CN115314103A - A data transmission method, device and chip for optical transmission network - Google Patents

Abstract

The present application discloses a data transmission method, device and chip for an optical transport network, which are used to meet switching protection requirements in complex scenarios. The optical transport network includes at least a first OTN device, a second OTN device and a third OTN device, and a communication link for transmitting service data is established between any two communication links, and both the second OTN device and the third OTN device are It is connected to the switching side through a communication link. The second OTN device can collect the working status of the communication link involving the device, and collect the working status of each communication link of the third OTN device, and determine the relationship between the first OTN device and the switching side according to the working status of each communication link. which communication links are used to transmit service data between them. When a communication link or OTN device fails, it can switch the transmission path in time to prevent service interruption.

Description

A data transmission method, device and chip for an optical transmission network

technical field

The embodiments of the present application relate to the technical field of optical communication, and in particular, to a data transmission method, device, and chip for an optical transport network.

Background technique

Sub-network connection protection (SNCP) refers to pre-arranging a dedicated protection route for a subnet connection. Once a subnet fails, the dedicated protection route will replace the subnet to undertake the transmission task in the entire network. The SNCP is currently a key technology for hard pipe protection of an optical transport network (OTN). SNCP supports "same source, same sink", but cannot support "same source, different sinks", that is, it cannot meet the switching protection for two sinks corresponding to the same source, so it cannot meet the switching protection requirements in complex scenarios.

Contents of the invention

Embodiments of the present application provide a data transmission method, device, and chip for an optical transport network, which are used to realize switching protection requirements in complex scenarios.

In a first aspect, an embodiment of the present application provides a data transmission method for an optical transport network, which is applied to an optical transport network including at least a first optical transport network OTN device, a second OTN device, and a third OTN device, and the method includes : the second OTN device monitors the working status of the first communication link, the third communication link and the fourth communication link, and acquires the information of the second communication link and the fifth communication link from the third OTN device Working state; the first communication link is used to connect the second OTN device to the first OTN device, and the second communication link is used to connect the first OTN device to the third OTN device, so The third communication link is used to connect the second OTN device and the third OTN device, the fourth communication link is used to connect the second OTN device and the switching side, and the fifth communication link Used to connect the third OTN device with the switching side; the second OTN device communicates according to the first communication link, the second communication link, the third communication link, the fourth communication link and all the fifth communication links The working state of the link controls a transmission path for transmitting the service data between the first OTN device and the switching side. In the above method, a protection group is formed by the second OTN device and the third OTN device, wherein one OTN device is used to collect the working status of each communication link of the two OTN devices belonging to the same protection group, and then according to each communication link The working status of the path, such as a communication link failure, can switch the transmission path in time, so as to control the transmission of service data between the protected first OTN device and the switching side.

In a possible design, the method further includes: negotiating between the second OTN device and the third OTN device through the third communication link that the second OTN device is the master OTN device, so The third OTN device is the standby OTN device. Negotiation between the second OTN device and the third OTN device which OTN device is to be the master OTN device and which OTN device is to be the backup OTN device is simple and effective.

In a possible design, the second OTN device and the third OTN device negotiate which OTN device is to be the master OTN device and which OTN device is to be the backup OTN device through device priorities. For example, the priority of the second OTN device is higher than the priority of the third OTN device.

The master OTN device and the standby OTN device are negotiated between the second OTN device and the third OTN device through the size of the device identifier. For example, the identifier of the second OTN device is smaller than the identifier of the third OTN device, and the second OTN device acts as Master OTN device. For another example, the identifier of the second OTN device is greater than the identifier of the third OTN device, and the second OTN device serves as the master OTN device.

The second OTN device and the third OTN device can first negotiate which OTN device is the master OTN device according to the priority of the devices. When the priorities of the two devices are the same, they can further negotiate which OTN device according to the size of the device identifier. The device is the master OTN device.

In a possible design, acquiring the working statuses of the second communication link and the fifth communication link from the third OTN device includes: the second OTN device receiving the third OTN device Sending the working status of the second communication link and the working status of the fifth communication link through the third communication link. In the above design, the third OTN device can monitor the working status of each communication link of the device in real time, so as to report the working status of each communication link of the device to the second OTN device.

In a possible design, the second OTN device according to the working status of the first communication link, the second communication link, the third communication link, the fourth communication link and all the fifth communication links Controlling the transmission path through which the service data is transmitted between the first OTN device and the switching side includes: the second OTN device road, the fourth communication link, and the fifth communication link, and control the communication between any two communication links in the first communication link, the third communication link, and the fourth communication link connected state on the second OTN device, and send control information to the third OTN device, the control information indicating the second communication link, the third communication link, and the fifth A connectivity status on the third OTN device between any two communication links in the communication links. In the above design, the second OTN device sets the connection status between the three communication links of the device according to the working status of each communication link of the two devices, and controls the three communication links of the third OTN device through the control information The connectivity status between the paths, and then realize the switching of the transmission path in time according to the working status of each communication link, such as a communication link failure, so as to control the business between the protected first OTN equipment and the switching side Data transmission to prevent business interruption.

In a possible design, the control between any two communication links among the first communication link, the third communication link, and the fourth communication link is between the second OTN device The connected state on the network includes: when the first communication link has a fault, and the working states of the second communication link, the third communication link and the fourth communication link are all normal, controlling the connection between the third communication link and the fourth communication link, controlling the disconnection between the first communication link and the third communication link on the second OTN device, and Controlling the disconnection between the first communication link and the fourth communication link. In the above design, when the communication link between the first OTN device and the second OTN device fails, it can be forwarded to the second OTN device by the third OTN device through the third communication link, and then transmitted to the switching side, and the switching The side need not be aware of the failure of the first communication link.

In a possible design, the method further includes: when the first communication link is faulty, the second OTN device receives the OTN message sent by the third OTN device through the third communication link. A data frame, the OTN data frame carrying service data from the first OTN device; the second OTN device obtains the service data from the ONT data frame, and sends it to the switching side through the fourth communication link The business data.

In a possible design, when there is a fault in the first communication link, and the working states of the second communication link, the third communication link and the fourth communication link are all normal , the control information indicates that the second communication link is connected to the third communication link, the second communication link is not connected to the fifth communication link, and the third communication link There is no communication between the link and the fifth communication link.

In a possible design, the control between any two communication links among the first communication link, the third communication link, and the fourth communication link is between the second OTN device connectivity status on , including:

When there is a fault in the fourth communication link, and the working status of the first communication link, the third communication link, and the fifth communication link is normal, on the second OTN device, control the communicate between the first communication link and the third communication link, control the disconnection between the first communication link and the fourth communication link, and control the connection between the third communication link and the fourth communication link The fourth communication links are disconnected.

In a possible design, when the fourth communication link is faulty and the working states of the first communication link, the third communication link and the fifth communication link are normal, the The control information indicates that the second communication link is disconnected from the third communication link, and the communication link between the second communication link and the fifth communication link is controlled to be disconnected, and the third communication link The road communicates with the fifth communication link. In the above design, when the communication link between the second OTN device and the switching side fails, the data is received through the first communication link, then forwarded to the third OTN device through the third communication link, and then transmitted to the switching side .

In a possible design, the method further includes: the second OTN device receiving the OTN data frame from the first OTN device through the first communication link; when the fourth communication link fails , the second OTN device sends the OTN data frame to the third OTN device through the third communication link.

In a possible design, control the connection between any two communication links among the first communication link, the third communication link, and the fourth communication link on the second OTN device connectivity status, including:

controlling the switch state of the port used to transmit the service data on the second OTN device, where the port used to transmit the service data on the second OTN device includes the first communication link on the second OTN device The first port used to transmit the service data, the second port used to transmit the service data on the third communication link, or the third port used to transmit the service data on the fourth communication link One or more of the above, wherein there is a connection channel between any two of the first port, the second port and the third port;

The control information indicates the switch state of the port used to transmit the service data on the third OTN device; the port used to transmit the service data on the third OTN device includes the port on the third OTN device The fourth port of the second communication link for transmitting the service data, the fifth port of the third communication link for transmitting the service data, or the fifth communication link for transmitting the service data One or more of the sixth ports, there is a connection channel between any two of the fourth port, the fifth port and the sixth port.

In the above design, the second OTN device realizes connection or disconnection between any two communication links by controlling the switch states of the ports of the two OTN devices, which is simple and effective.

In a possible design, there is a fault in the first communication link, and the working states of the second communication link, the fourth communication link and the third communication link are all working normally , the second OTN device controls the switch state of the second port and the third port to be on, and the switch state of the first port is off; the control information indicates the switch state of the fourth port and the switch state of the fifth port The switch states are all on and the switch state of the sixth port is off. In the above design, when the communication link between the first OTN device and the second OTN device fails, it can be forwarded to the second OTN device by the third OTN device through the third communication link, and then transmitted to the switching side, and the switching The side need not be aware of the failure of the first communication link.

In a possible design, when there is a fault in the fourth communication link, and the working states of the first communication link, the fifth link and the third communication link are all working normally , the switch states of the first port and the second port configured by the second OTN device are both open, and the state of the third port is closed; the control information indicates that the switch state of the fourth port is closed, and the state of the first port is closed. Both the switch state of the fifth port and the switch state of the sixth port are on. In the above design, when the communication link between the second OTN device and the switching side fails, by setting the switch state of each port, the data is received through the first communication link, and then forwarded to the second OTN device through the third communication link. Three OTN equipment, and then transmitted to the switching side.

In a possible design, control the connection between any two communication links among the first communication link, the third communication link, and the fourth communication link on the second OTN device The connected state includes: controlling the connected state of any two ports used to transmit the service data on the second OTN device, where the port used to transmit the service data on the second OTN device includes the second The first port used to transmit the service data on the first communication link on the OTN device, the second port used to transmit the service data on the third communication link, or the second port used to transmit the service data on the fourth communication link One or more of the third ports of the service data; the control information indicates the connection status of any two ports used to transmit the service data on the third OTN device; the third OTN device The port used to transmit the service data on the third OTN device includes a fourth port used to transmit the service data on the second communication link on the third OTN device, and a fourth port used to transmit the service data on the third communication link. One or more of the fifth port or the sixth port on the fifth communication link for transmitting the service data. In the above design, the second OTN device controls the connection state between the ports on the two OTNs, so as to realize the connection or non-connection between the communication links, which is simple and effective.

In a possible design, there is a fault in the first communication link, and the working states of the second communication link, the fourth communication link and the third communication link are all working normally , the second OTN device controls the communication between the second port and the third port, the communication between the first port and the second port, and the communication between the first port and the third port. There is no communication between the ports; the control information indicates that there is communication between the fourth port and the fifth port, there is no communication between the fourth port and the sixth port, and the connection between the fifth port and the There is no communication between the sixth ports. In the above design, when the communication link between the first OTN device and the second OTN device fails, the connection status between any two ports can be set, so that the third OTN device forwards to On the second OTN device, it is then transmitted to the switch side, and the switch side does not need to sense the failure of the first communication link.

In a possible design, when there is a fault in the fourth communication link, and the working states of the first communication link, the fifth link and the third communication link are all working normally , the second OTN device controls communication between the first port and the second port, disconnection between the first port and the third port, and disconnection between the second port and the third port ; The control information indicates that the fifth port is connected to the sixth port, the fourth port is not connected to the fifth port, and the fourth port is connected to the sixth port. Not connected.

In the above design, when the communication link between the second OTN device and the switching side fails, by setting the connection state between any two ports, it is possible to receive data through the first communication link, and then through the third communication link The road is forwarded to the third OTN device, and then transmitted to the switching side.

In a possible design, control the connection between any two communication links among the first communication link, the third communication link, and the fourth communication link on the second OTN device Connected state, including: controlling the selection state of each of the first port, the second port and the third port used to transmit the service data on the second OTN device to select and receive data from the other two ports, the first The port is a port of the first communication link on the second OTN device, the second port is a port of the third communication link on the second OTN device, and the third port is a port of the fourth communication link on the second OTN device . The control information instructs each of the fourth port, the fifth port, and the sixth port on the third OTN device to select a selection state for receiving data from the other two ports. The fourth port is the port of the second communication link on the third OTN device, the fifth port is the port of the third communication link on the third OTN device, and the sixth port is the port of the fifth communication link on the third OTN device . In the above design, the second OTN device controls the selection states of the ports on the two OTNs to realize connectivity or disconnection between communication links, which is simple and effective.

In a possible design, there is a fault in the first communication link, and the working states of the second communication link, the fourth communication link and the third communication link are all working normally , the second OTN device controls the third port to select the second port for receiving service data, and the second port selects the third port for receiving service data. The control information instructs the fifth port to receive service data from the fourth port, and the fourth port receives service data from the fifth port. The sixth port may not receive service data. In the above design, when the communication link between the first OTN device and the second OTN device fails, the selection state of the port can be selected by setting the port, so that the third OTN device forwards to the second OTN through the third communication link on the device, and then transmit to the switching side, and the switching side does not need to sense the failure of the first communication link.

In a possible design, when there is a fault in the fourth communication link, and the working states of the first communication link, the fifth link and the third communication link are all working normally , the second OTN device controls the first port to select the second port to receive service data, and the second port selects the first port to receive service data. The control information instructs the fourth port to select the sixth port to receive service data, and the sixth port selects the fourth port to receive service data. In the above design, when the communication link between the second OTN device and the switching side fails, the selection status of other ports is selected by setting the port, so as to receive data through the first communication link and then forward it through the third communication link to the third OTN device, and then transmitted to the switching side.

In a possible design, control the connection between any two communication links among the first communication link, the third communication link, and the fourth communication link on the second OTN device Connected state, including: controlling the selection state of each of the first port, the second port and the third port used to transmit the service data on the second OTN device to select to send service data to the other two ports, the first One port is the port of the first communication link on the second OTN device, the second port is the port of the third communication link on the second OTN device, and the third port is the port of the fourth communication link on the second OTN device port. The control information indicates the selection status of each of the fourth port, the fifth port and the sixth port used to transmit service data on the third OTN device to select to send service data to the other two ports. The fourth port is the port of the second communication link on the third OTN device, the fifth port is the port of the third communication link on the third OTN device, and the sixth port is the port of the fifth communication link on the third OTN device . In the above design, the second OTN device controls the selection states of the ports on the two OTNs to realize connectivity or disconnection between communication links, which is simple and effective.

In a possible design, there is a fault in the first communication link, and the working states of the second communication link, the fourth communication link and the third communication link are all working normally , the second OTN device controls the third port to select the second port to send service data, and the second port selects the third port to send service data. The control information instructs the fifth port to select the fourth port to send service data, and the fourth port selects the fifth port to send service data. The sixth port may not receive service data. In the above design, when the communication link between the first OTN device and the second OTN device fails, the selection state of the port can be selected by setting the port, so that the third OTN device forwards to the second OTN through the third communication link on the device, and then transmit to the switching side, and the switching side does not need to sense the failure of the first communication link.

In a possible design, when there is a fault in the fourth communication link, and the working states of the first communication link, the fifth link and the third communication link are all working normally , the second OTN device controls the first port to select the second port to send service data, and the second port selects the first port to send service data. The control information instructs the fourth port to select the sixth port to send service data, and the sixth port selects the fourth port to send service data. In the above design, when the communication link between the second OTN device and the switching side fails, the selection status of other ports is selected by setting the port, so as to receive data through the first communication link and then forward it through the third communication link to the third OTN device, and then transmitted to the switching side.

In a second aspect, an embodiment of the present application provides a data transmission method for an optical transport network, which is applied to an optical transport network including at least a first optical transport network OTN device, a second OTN device, and a third OTN device, and the method includes : the third OTN device receives the control information of the second OTN device, the control information indicates that between any two communication links in the second communication link, the third communication link, and the fifth communication link Connected state on the third OTN device; wherein, the second communication link is used to connect the first OTN device and the third OTN device, and the fifth communication link is used to connect the third OTN device The OTN device and the switching side; the third communication link is used to connect the second OTN device and the third OTN device; the third OTN device controls the second communication link according to the control information, A connection state between any two communication links in the third communication link and the fifth communication link. In the above design, the third OTN device sets the connection status of any two communication links through the control of the second OTN device, so that when a link of the second OTN device fails, it can realize forwarding services from the third OTN device Data, to achieve homogeneous and heteroclinic protection.

In a possible design, the method further includes: negotiating between the second OTN device and the third OTN device through the third communication link that the second OTN device is the master OTN device, so The third OTN device is the standby OTN device.

In a possible design, the method further includes: the third OTN device monitoring the working status of the second communication link and the fifth communication link; The second OTN device sends the working status of the second communication link and the fifth communication link, and the working status of the second communication link and the fifth communication link is used for the second OTN device to determine the control information. In the above design, the third OTN device monitors the working status of each communication link on the device in real time, and reports it to the second OTN device in real time, so that the second OTN device realizes communication link switching according to the working status of each communication link, Prevent business interruption.

In a possible design, when there is a fault in the first communication link, and the link states of the second communication link, the fourth communication link, and the third communication link are all normal, the The control information indicates that the second communication link is connected to the third communication link, the second communication link is not connected to the fifth communication link, and the third communication link is connected to the fifth communication link. The fifth communication link is disconnected, the first communication link is used to connect the first OTN device and the second OTN device, and the fourth communication link is used to connect the second OTN device. The OTN device and the switching side; the third OTN device controls communication between any two of the second communication link, the third communication link, and the fifth communication link according to the control information The connected state includes: the third OTN device controls the connection between the second communication link and the third communication link according to the control information, and controls the connection between the second communication link and the fifth communication link. The communication links are disconnected, and the disconnection between the third communication link and the fifth communication link is controlled. In the above design, when the communication link between the first OTN device and the second OTN device fails, it can be forwarded to the second OTN device by the third OTN device through the third communication link, and then transmitted to the switching side, and the switching The side need not be aware of the failure of the first communication link.

In a possible design, the method further includes: the third OTN device receiving the OTN data frame from the first OTN device through the second communication link; the third OTN device receiving the OTN data frame through the third The communication link sends the OTN data frame to the second OTN device.

In a possible design, when the fourth communication link is faulty and the working states of the first communication link, the third communication link and the fifth communication link are normal, the The control information indicates that the second communication link is not connected to the third communication link, the second communication link is not connected to the fifth communication link, and the third communication link communicate with the fifth communication link, the fourth communication link is used to connect the second OTN device and the switching side, and the first communication link is used to connect the first OTN device and the second OTN device; the third OTN device controls communication between any two of the second communication link, the third communication link, and the fifth communication link according to the control information The connected state includes: the third OTN device controls the disconnection between the second communication link and the third communication link according to the control information, and controls the connection between the second communication link and the third communication link. The five communication links are not connected, and the connection between the third communication link and the fifth communication link is controlled. In the above design, when the communication link between the second OTN device and the switching side fails, the data is received through the first communication link, then forwarded to the third OTN device through the third communication link, and then transmitted to the switching side .

In a possible design, the method further includes: the third OTN device receives the OTN data frame sent by the second OTN device through the third communication link, and the OTN data frame carries information from the first OTN device. Service data of the OTN device; the third OTN device obtains the service data from the ONT data frame, and sends the service data to the switching side through the fifth communication link.

In a possible design, the method further includes: when the third OTN device determines that the second OTN device is faulty, controlling the connection between the second communication link and the fifth communication link , controlling the disconnection between the second communication link and the third communication link, and controlling the disconnection between the third communication link and the fifth communication link. In the above design, when the third OTN device monitors that the second OTN device fails, it can switch the transmission path between the first OTN device and the switching side.

In the third aspect, the embodiment of the present application provides a data transmission device for an optical transport network, which is applied to the second OTN device. For the beneficial effect, please refer to the related description of the first aspect, which will not be repeated here. The device includes a main control unit and a crossover unit;

The main control unit is configured to monitor the working status of the first communication link, the third communication link and the fourth communication link, and acquire the working status of the second communication link and the fifth communication link from the third OTN device state;

The first communication link is used to connect the second OTN device to the first OTN device, the second communication link is used to connect the first OTN device to the third OTN device, and the third The communication link is used to connect the second OTN device and the third OTN device, the fourth communication link is used to connect the second OTN device and the switching side, and the fifth communication link is used to connect the third OTN device and the switching side;

The main control unit is further configured to control the setting of the cross-connection unit according to the working states of the first communication link, the second communication link, the third communication link, the fourth communication link and the fifth communication link The connection relationship between any two communication links in the first communication link, the third communication link and the fourth communication link, and control the second communication link, the third communication link and the fourth communication link on the third OTN device The connection relationship between any two communication links among the five communication links;

The crossover unit is configured to set the connection relationship between any two communication links among the first communication link, the third communication link and the fourth communication link under the control of the main control unit.

In a possible design, the device further includes a first line unit, a second line unit, and a branch unit; the first line unit is connected to the first OTN device through a first communication link, and the second line unit The unit is connected to the third OTN device through the third communication link, and the branch unit is used to connect to the switching side through the fourth communication link;

The main control unit is specifically configured to instruct the cross-connect unit to establish A cross connection between at least two communication units in the first line unit, the second line unit, and the branch unit.

In a possible design, the main control unit is specifically configured to control the crossover unit to establish a crossover between the second line unit and the branch unit when it is determined that the first communication link has a fault. connect;

Wherein, the cross-connection between the first line unit and the second line unit is not established, and the cross-connection between the first line unit and the branch unit is not established.

In a possible design, the main control unit is specifically configured to, when determining that there is a fault in the fourth communication link, control the cross-connect unit to establish a connection between the first line unit and the second line unit. cross connect;

Wherein, the cross-connection between the first line unit and the branch unit is not established, and the cross-connection between the second line unit and the branch unit is not established.

In a possible design, the main control unit is further configured to negotiate with the third OTN device through the third communication link that the second OTN device be the master OTN device, and the third OTN device To prepare OTN equipment.

In a possible design, the main control unit is specifically used for:

Obtain the working status of the first communication link from the first line unit, acquire the working status of the third communication link from the second line unit, and acquire the fourth communication link from the branch unit The working status of the link;

receiving the working status of the second communication link and the working status of the fifth communication link sent by the third OTN device.

In a possible design, the main control unit is specifically used for:

sending control information to the third OTN device, the control information indicating connectivity between any two communication links in the second communication link, the third communication link, and the fifth communication link relation.

In the fourth aspect, the embodiment of the present application provides a data transmission device for an optical transport network, which is applied to the third OTN equipment in the optical transport network. For the beneficial effect, please refer to the relevant description of the second aspect, and details are not repeated here. The optical transport network also includes a first OTN device and a second OTN device, and the device includes a main control unit and a cross-connect unit;

The main control unit is configured to receive control information from the second OTN device, the control information is used by the third OTN device to control the second communication link, the third communication link, and the fifth communication link The connectivity state on the third OTN device between any two communication links;

Wherein, the second communication link is used to connect the first OTN device and the third OTN device, and the fifth communication link is used to connect the third OTN device and the switching side; the third communication link The road is used to connect the second OTN device and the third OTN device; the second communication link, the second communication link and the fifth communication link are used for the first OTN device and the Transmission of business data between switching sides;

The main control unit is further configured to control the cross-connect unit to set the communication between any two communication links among the second communication link, the third communication link and the fifth communication link according to the control information. relation;

The crossover unit is configured to set a connection relationship between any two communication links among the second communication link, the third communication link and the fifth communication link under the control of the main control unit.

In a possible design, the device further includes a first line unit, a second line unit, and a branch unit; the first line unit is connected to the first OTN device through a second communication link, and the second line unit The unit is connected to the second OTN device through the third communication link, and the branch unit is used to connect the switching side through the fifth communication link;

The main control unit is specifically configured to instruct the cross unit to establish a cross connection between at least two communication units among the first line unit, the second line unit, and the branch unit according to the control information.

In a possible design, when there is a fault in the first communication link, and the link states of the second communication link, the fourth communication link, and the third communication link are all normal, the The control information indicates that the second communication link is connected to the third communication link, the second communication link is not connected to the fifth communication link, and the third communication link is connected to the fifth communication link. The fifth communication link is not connected; the first communication link is used to connect the first OTN device and the second OTN device, and the fourth communication link is used to connect the second OTN device. OTN equipment and the switching side;

The main control unit is specifically configured to control the cross unit to establish a cross connection between the first line unit and the second line unit according to the control information;

Wherein, the cross-connection between the first line unit and the branch unit is not established, and the cross-connection between the second line unit and the branch unit is not established.

In a possible design, when the fourth communication link is faulty, the control information indicates that the second communication link is disconnected from the third communication link, and the second communication link The link is not connected to the fifth communication link, and the third communication link is connected to the fifth communication link;

The main control unit is specifically configured to control the cross unit to establish a cross connection between the second line unit and the branch unit according to the control information;

Wherein, the cross connection between the first line unit and the second line unit is not established, and the cross connection between the first line unit and the branch unit is not established.

In a possible design, the main control unit is further configured to negotiate with the second OTN device through a third communication link that the second OTN device is the master OTN device, and the third OTN device is the backup OTN equipment.

In a possible design, the main control unit is also used for:

acquiring the working status of the second communication link from the first line unit, and acquiring the working status of the fifth communication link from the branch unit;

sending the working status of the second communication link and the working status of the fifth communication link to the third OTN device;

The working state of the second communication link and the working state of the fifth communication link are used by the second OTN device to determine the control information.

In a fifth aspect, the embodiment of the present application provides a chip. The chip includes: a processor and a communication interface. The communication interface is used for inputting and/or outputting information. The processor is configured to execute a computer program, so that the method provided by any design in the first aspect is executed.

In a sixth aspect, the embodiment of the present application provides a chip. The chip includes: a processor and a communication interface. The communication interface is used for inputting and/or outputting information. The processor is configured to execute a computer program, so that the method provided by any design in the second aspect is executed.

In a seventh aspect, the embodiment of the present application provides a communication system. The communication system includes the device provided by the above third aspect or any possible design of the third aspect and the device provided by the above fourth aspect or any possible design of the fourth aspect.

In an eighth aspect, the embodiment of the present application provides a communication system. The communication system includes the above-mentioned chip of the fifth aspect and the above-mentioned chip of the sixth aspect.

In a ninth aspect, the embodiment of the present application provides a computer-readable storage medium. A software program is stored in the storage medium, and when the software program is read and executed by one or more processors, the method provided by any possible design of any one of the first to second aspects can be realized.

In a tenth aspect, the embodiment of the present application provides a computer program product including instructions. When it runs on a computer, the computer is made to execute the method provided by any possible design of any one of the first to fourth aspects above.

Description of drawings

FIG. 1 is a schematic diagram of an optical transport network architecture in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a possible OTN device in an embodiment of the present application;

Fig. 3 is a kind of SNCP protection schematic diagram in the embodiment of the present application;

FIG. 4A is a schematic diagram of another optical transport network architecture in the embodiment of the present application;

FIG. 4B is a schematic diagram of another optical transport network architecture in the embodiment of the present application;

FIG. 5A is a schematic diagram of a hello message in the embodiment of the present application;

FIG. 5B is a schematic diagram of a protocol message format in the embodiment of the present application;

FIG. 6 is a schematic diagram of another optical transport network architecture in an embodiment of the present application;

FIG. 7A is a schematic diagram of port sending and receiving in the embodiment of the present application;

Figure 7B is a schematic diagram of the MC-SNCP group in the embodiment of the present application;

FIG. 8A is a schematic diagram of a control information format in an embodiment of the present application;

FIG. 8B is a schematic diagram of another control information format in the embodiment of the present application;

FIG. 8C is a schematic diagram of another control information format in the embodiment of the present application;

FIG. 8D is a schematic diagram of another control information format in the embodiment of the present application;

FIG. 9A is a schematic flowchart of a data transmission method in scenario 1 of the embodiment of the present application;

FIG. 9B is a schematic diagram of a data transmission process in scenario 1 of the embodiment of the present application;

FIG. 9C is a schematic diagram of another data transmission process in scenario 1 of the embodiment of the present application;

FIG. 10A is a schematic flowchart of a data transmission method in scenario 2 of the embodiment of the present application;

FIG. 10B is a schematic diagram of a data transmission process in scenario 3 of the embodiment of the present application;

FIG. 11A is a schematic flowchart of a data transmission method in scenario 3 of the embodiment of the present application;

FIG. 11B is a schematic diagram of a data transmission process in scenario 3 of the embodiment of the present application;

FIG. 12A is a schematic flowchart of a data transmission method in scenario 4 of the embodiment of the present application;

FIG. 12B is a schematic diagram of a data transmission process in Scenario 4 of the embodiment of the present application;

FIG. 13 is a schematic structural diagram of an OTN device in an embodiment of the present application;

FIG. 14 is a schematic structural diagram of another OTN device in the embodiment of the present application;

FIG. 15 is a schematic structural diagram of another OTN device in the embodiment of the present application;

FIG. 16A is a schematic diagram of a protocol message format in an embodiment of the present application;

FIG. 16B is a schematic diagram of another protocol message format in the embodiment of the present application;

FIG. 17 is a schematic structural diagram of a data transmission device in an embodiment of the present application;

FIG. 18 is a schematic structural diagram of another data transmission device in an embodiment of the present application.

Detailed ways

The embodiment of the present application is applicable to an optical network, for example, an optical transport network (optical transport network, OTN). An optical transport network is usually formed by connecting multiple OTN devices through optical fibers, and can be composed of different topologies such as line, ring, and mesh according to specific needs. The OTN shown in Figure 1 is composed of two OTN networks. Each OTN consists of a certain number of OTN devices, one of which includes N1-N4, and the other includes N5-N7. According to actual needs, an OTN device may have different functions. Generally speaking, OTN equipment is divided into optical layer equipment, electrical layer equipment, and optical-electrical hybrid equipment. An optical layer device refers to a device capable of processing optical layer signals, such as an optical amplifier (optical amplifier, OA) and an optical add-drop multiplexer (optical add-drop multiplexer, OADM). The OA may also be called an optical line amplifier (optical line amplifier, OLA), which is mainly used to amplify an optical signal to support transmission over a longer distance under the premise of ensuring a specific performance of the optical signal. The OADM is used to transform the space of the optical signal so that it can be output from different output ports (also called directions sometimes). Electrical-layer devices refer to devices that can process electrical-layer signals, for example, devices that can process OTN signals. Optical hybrid equipment refers to equipment capable of processing optical layer signals and electrical layer signals. It should be noted that, according to specific integration requirements, one OTN device can integrate various functions. The technical solution provided by this application is applicable to OTN equipment of different forms and integration levels. The OTN equipment involved in the embodiment of the present application may be called a network node, or a node for short.

Fig. 2 is a schematic structural diagram of a possible OTN device. The OTN device here may refer to any OTN device (N1-N7) in FIG. 1 . Specifically, an OTN device includes power supplies, fans, auxiliary boards, and may also include tributary boards, line boards, cross-connect boards, optical layer processing boards, and system control and communication boards (or main control boards for short). ). Among them, the power supply is used to supply power to the OTN equipment, and may include main and backup power supplies. Fans are used to cool the device. Auxiliary boards are used to provide auxiliary functions such as external alarms or access to external clocks. Tributary boards, cross-connect boards, and line boards are mainly used to process OTN electrical layer signals. Wherein, the tributary board is used to implement receiving and sending of various customer services, such as synchronous digital hierarchy (synchronous digital hierarchy, SDH) service, packet service, Ethernet service, and fronthaul service. Furthermore, the tributary board can be divided into client-side optical modules and signal processors. Wherein, the client-side optical module may be an optical transceiver for receiving and/or sending service data. The signal processor is used to realize the mapping and de-mapping processing of business data to data frames. The cross-connect board is used to realize the exchange of data frames and complete the exchange of one or more types of data frames. The circuit board mainly implements the processing of data frames on the line side. Specifically, the circuit board can be divided into a line-side optical module and a signal processor. Wherein, the line-side optical module may be a line-side optical transceiver for receiving and/or sending data frames. The signal processor is used to implement multiplexing and demultiplexing, or mapping and demapping processing of data frames on the line side. System control and communication boards are used to implement system control and communication. Specifically, information can be collected from different single boards through the backplane, or control commands can be sent to corresponding single boards. It should be noted that, unless otherwise specified, there may be one or more specific components (for example: signal processors), which are not limited in this application. It should also be noted that the embodiment of the present application does not impose any restrictions on the types of boards included in the device, as well as the specific functional design and quantity of the boards. As an example, the tributary board may include a packet board or an OTN-based Ethernet (Ethernet over OTN, EoO) single board.

It should be noted that the type and number of boards contained in each OTN device may be different. For example, the OTN equipment serving as a core node may not have a tributary board. An OTN device serving as an edge node may have multiple tributary boards.

The technical concepts involved in the embodiments of the present application will first be described below.

(1) OTN data frame, the data frame structure used by the OTN device in the embodiment of the present application may be an OTN data frame (also called an OTN transmission frame, or OTN frame for short), which is used to carry various service data, and can Realize the management and monitoring of business data. The OTN frame may be an optical data unit k (optical data unit k, ODUk), ODUCn, ODUflex, or an optical channel transport unit k (optical transport unit k, OTUk), OTUCn, or a flexible OTN (flexibleOTN, FlexO) frame, etc. Among them, the difference between ODU frame and OTU frame is that OTU frame includes ODU frame and OTU overhead; k represents different rate levels, for example, k=1 represents 2.5Gbps, k=4 represents 100Gbps; Cn represents variable rate, specifically A positive integer multiple of 100Gbps. Unless otherwise specified, the ODU frame refers to any one of ODUk, ODUCn or ODUflex, and the OTU frame refers to any one of OTUk, OTUCn or FlexO. The OTN frame may also be a flexible optical service unit (flexible optical service unit, OSUflex) or the like. It should also be pointed out that with the development of OTN technology, new types of OTN frames may be defined, which are also applicable to this application. (2) The multi-chassis link aggregation group (MC-LAG) is a mechanism for achieving cross-device link aggregation, which can realize link aggregation between multiple devices, thereby reducing link reliability from The board level is raised to the device level to form a dual-active system. The basic idea of MC-LAG technology is to allow two devices to perform link aggregation negotiation with other devices that need to be connected in the same state. From the perspective of the device that needs to be connected, it is like establishing a link aggregation with one device. relation.

(3) A plurality refers to two or more than two. "And/or" describes the association relationship of associated objects, and there may be three kinds of relationships. For example, A and/or B may mean: A exists alone, A and B exist simultaneously, and B exists alone.

(4) The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

(5) In the embodiment of the present application, terms such as first, second, and third may be used to describe various OTN devices, links, and the like. However, these OTN equipment and links should not be limited to these terms. These terms are only used to distinguish different OTN equipment or different links from each other.

A possible SNCP protection is described below. The SNCP protection based on the OTN data frame is a technical solution adopted in the OTN network to protect the transmitted service data. FIG. 3 is an example diagram of a possible basic principle of SNCP protection based on OTN data frames. On the OTN device, dual transmission of service data at the sender can be implemented through the OTN cross-connect board. For example, in the transmission direction of OTN device 1→OTN device 2 in Figure 3, OTN cross-connect board 1 can transmit a working signal flow and a protection signal flow to OTN device 2, that is, the "1+1" networking deployment mode (or Called "1+1" protection mode). Similarly, in the transmission direction from OTN device 2 → OTN device 1, a working signal flow and a protection signal flow can also be sent through the OTN cross-connect board 2 . In addition, on the OTN device, it is also possible to implement selective collection of service data at the receiving end through the OTN cross-connect board. For example, in FIG. 3 , the OTN device 1 can selectively receive the working signal flow and reject the protection signal flow, so that the cross-connection of the protection signal flow on the OTN cross-connect board 1 is not established. Similarly, the OTN device 2 in FIG. 3 can selectively receive the working signal flow and reject the protection signal flow. In addition, when the working signal flow is abnormal, the receiving end can selectively receive service data on the protection signal flow through the protection switching protocol. In this way, the SNCP protection based on the OTN data frame can be realized through the dual-send selective reception and protection switching protocol between network devices.

SNCP protection can also adopt a "1:1" protection mode. The difference between the "1:1" protection mode and the "1+1" protection mode is that in the "1:1" protection mode, the transmission direction from OTN equipment 1 to OTN equipment 2 passes through OTN cross-connect board 1 to the OTN equipment. 2. It is enough to transmit one working signal flow. When the working signal flow is abnormal, the sending end sends it through another signal channel. The protection mode of "1+1" adopts the method of double transmission and selective reception, and the protection mode of "1:1" adopts the method of single transmission and single reception.

It can be seen from the above that a possible SNCP protection scheme described above only supports "same source and same sink", but cannot support "same source and different sinks", that is, it cannot satisfy the switching protection corresponding to two sinks at the same source. Therefore, the switching protection requirements in complex scenarios cannot be met. In addition, it can be seen from Figure 3 that the service of the tributary board is sent to two line boards of the same device, and then reaches the switching side through the same device. If the device fails or is powered off, the service will be interrupted.

Embodiments of the present application provide a data processing method and device for an optical transport network, which are used to support same-source and different-destination. Among them, the method and the device are based on the same technical conception. Since the principle of solving the problem of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.

Referring to FIG. 4A and FIG. 4B , it is a schematic diagram of an optical transport network system architecture provided by an embodiment of the present application. An optical transport network system includes multiple OTN devices. In FIG. 4A and FIG. 4B , three OTN devices are taken as an example, which are respectively a first OTN device, a second OTN device and a third OTN device. A communication link is established between any two OTN devices of the first OTN device, the second OTN device, and the third OTN device. In this embodiment of the present application, for the sake of distinction, the communication link between the first OTN device and the second OTN device is called the first communication link, that is, the first OTN device and the second OTN are connected through the first communication link, which can It is understood that the first communication link refers to a communication link established between the first OTN device and the second OTN device for transmitting service data between the first OTN device and the switching side. The communication link between the first OTN device and the third OTN device is called the second communication link, that is, the first OTN device and the third OTN device are connected through the second communication link. It can be understood that the second communication link is Refers to the communication link established between the first OTN device and the third OTN device for transmitting service data between the first OTN device and the switching side. The communication link between the second OTN device and the third OTN device is called a third communication link, that is, the second OTN device and the third OTN device are connected through the third communication link. Exemplarily, the third communication link may include a service channel and a control channel, the service channel is used to transmit service data between the first OTN device and the switching side, and the control channel may be used between the second OTN device and the third OTN device Control information or status information of the service channel is transmitted between them.

In some embodiments, the optical transport network system may further include other OTN devices, for example, the first OTN device and the second OTN device may be connected through other OTN devices. The first OTN device and the third OTN device may also be connected through other OTN devices. The second OTN device and the third OTN device form an SNCP group, which may also be called an improved SNCP group, or a multi classis sub-network connection protection (MC-SNCP) group. The MC-SNCP group is an SNCP group spanning two OTN devices, the master and the slave. Exemplarily, the MC-SNCP group in the embodiment of the present application may adopt a 1:1 or 1+1 deployment manner. In the subsequent description, the 1+1 deployment method is used as an example.

The second OTN device and the third OTN device are also connected to the switching side. A fourth communication link is established between the second OTN device and the switching side, and a fifth communication link is established between the third OTN device and the switching side.

It should be noted that the switching side may include one or more switching devices. The switching device may be a router, a switch, a network bridge, and other devices with routing or switching functions. In some embodiments, the second OTN device and the third OTN device may be respectively connected to the same switching device on the switching side. In some embodiments, the switching side includes at least two switching devices. For ease of description, the switching device connected to the second OTN device is called switching device 1 , and the switching device connected to the third OTN device is called switching device 2 . One of the switching device 1 and the switching device 2 is the active switching device, and the other is the standby switching device, as shown in FIG. 4B . As an optional manner, when the second OTN device is the master device, the switching device 1 is the master device; when the third OTN device is the backup device, the switching device 2 is the master device. It can be understood that the second OTN device is connected to switching device 1, and the third OTN device is connected to switching device 2, that is, a fourth communication link is established between the second OTN device and switching device 1, and the third OTN device is connected to switching device 1. A fifth communication link is established between the devices 2 .

In an example, a communication link may be established between the second OTN device and the third OTN device and the switching device by using a cross-device link aggregation group (multi-chassis link aggregation group, MC-LAG) technology. The MC-LAG technology can be used to establish a communication link between the switching device 1 and the switching device 2, so that an MC-LAG group can be formed between the switching device 1 and the switching device 2.

In another example, a virtual router redundancy protocol (virtual router redundancy protocol, VRRP) technology may also be used to establish a communication link between the second OTN device and the third OTN device and the switching device. The VRRP technology can be used to establish a communication link between the switching device 1 and the switching device 2, so that a VRRP group can be formed between the switching device 1 and the switching device 2.

It should be noted that communication links between the second OTN device and the third OTN device and the switching side may also be established using other protocols that support active/standby control, which is not specifically limited in this embodiment of the present application.

In the subsequent description, the establishment of a communication link between the second OTN device and the third OTN device and the switching side using MC-LAG technology is taken as an example. Based on this, the fourth communication link can also be called the first MC-LAG link , the fifth communication link may be referred to as a second MC-LAG link. The first MC-LAG link refers to a communication link established between the second OTN device and the switching side for transmitting service data between the first OTN device and the switching side. The second MC-LAG link refers to a communication link established between the third OTN device and the switching side for transmitting service data between the first OTN device and the switching side.

One OTN device among the second OTN device and the third OTN device serves as the master OTN device, and the other OTN device serves as the standby OTN device. The second OTN device and the third OTN device may determine which OTN device serves as the master OTN device through negotiation. For example, the second OTN device and the third OTN device negotiate which OTN device is to be the master OTN device through a third communication link, such as a control channel included in the third communication link.

In some embodiments, the second OTN device and the third OTN device may negotiate which OTN device is to be the master OTN device by comparing priorities. For example, the second OTN device and the third OTN device may send negotiation packets to each other through the third communication link. The negotiation message includes information for indicating the priority, such as an identifier (Identifier, ID) of the priority. For example, the larger the priority ID, the higher the priority, or the smaller the priority ID, the higher the priority. Taking the second OTN device as the master OTN device as an example, the priority of the second OTN device is higher than that of the third OTN device.

In some other embodiments, the second OTN device and the third OTN device may negotiate which OTN device is to be the master OTN device by comparing the sizes of the device identifiers. For example, the second OTN device and the third OTN device may send negotiation packets to each other through the third communication link, and the negotiation packets include their own device IDs. For example, the OTN device with a larger device identifier acts as the active OTN device, and the OTN device with a smaller device identifier acts as the backup OTN device; taking the second OTN device as the active OTN device An identifier of the third OTN device. For another example, an OTN device with a larger device identifier is used as a backup OTN device, and an OTN device with a smaller device identifier is used as a backup OTN device. Taking the second OTN device as the master OTN device as an example, the identifier of the second OTN device is smaller than the identifier of the third OTN device.

In some other embodiments, the second OTN device and the third OTN device send negotiation packets to each other through the third communication link, and the negotiation packets include their own device IDs and priority IDs. When the second OTN device and the third OTN device determine through negotiation that they have the same priority, they can determine which OTN device is to be the master OTN device according to the size of the identifier of the device.

Exemplarily, the negotiation packet may be a hello packet. Hello packet includes device ID and priority ID. Referring to FIG. 5A , the identifier of the device is identified by NEID, which may occupy 4 bytes (Byte, B). Priority ID can occupy 2 bytes.

It should be noted that the second OTN device and the third OTN device may negotiate the active OTN device and the standby OTN device through other selection principles, which is not specifically limited in this embodiment of the present application.

The second OTN device as the master OTN device can collect the working status of each communication link, specifically obtain the first communication link, the second communication link, the first MC-LAG link, the second MC-LAG link, and the first The working status of the three communication links. Then control the transmission link through which the service data is transmitted between the first OTN device and the switching side according to the working status of each communication link.

In some embodiments, the second OTN device may be responsible for monitoring the working states of the first communication link, the first MC-LAG link and the third communication link. For example, the second OTN device can monitor the service status of the line side in real time according to the OTN data frame sent by the first OTN device through the first communication link (for example, a service channel). For example, if a signal degradation (signal degrade, SD) signal or a signal failure (signal fail, SF) signal is received through the first communication link, it is determined that there is a fault in the first communication link, that is, the working state is a fault state (may simply be referred to as glitches). For another example, the second OTN device may monitor the working status of the second MC-LAG link in real time. The second OTN device can monitor the working status of the third communication link in real time.

In some other embodiments, the third OTN device as the standby OTN device can monitor the link state information of the device in real time, such as the working status of the second communication link and the second MC-LAG link, and then send the second OTN device Sending the monitored working status of the second communication link and the second MC-LAG link, so that the second OTN device receives the working status of the second communication link and the second MC-LAG link from the third OTN device. As an example, referring to FIG. 5B , the third OTN device may send the working status of the second communication link and the second MC-LAG link to the second OTN device by using the first protocol packet format. In FIG. 5B , the state of the second communication link is represented by the OTN state field, and the working state of the second MC-LAG link is represented by the tributary board state field. As an example, the format of the first protocol packet may further include an MC-SNCP group ID.

As an example, different MC-SNCP groups may be configured between the second OTN device and the third OTN device for service data transmitted by different receiving devices and sending devices. For example, as shown in FIG. 6 , both the fourth OTN device and the second OTN device need to send service data to the switching side. The second OTN device and the third OTN device can be configured as an MC-SNCP group for the service data transmitted between the fourth OTN device and the switching side, and can be configured as an MC-SNCP group for the service data transmitted between the first OTN device and the switching side. Another MC-SNCP group.

Different SNCP groups may be configured between the second OTN device and the third OTN device for different service data transmitted by the same receiving device and transmitting device. For example, an MC-SNCP group can be configured between the second OTN device and the third OTN device for service data 1 transmitted between the first OTN device and the switching side, and between the second OTN device and the third OTN device can be the first OTN device Configure another MC-SNCP group with the service data 2 transmitted on the switching side.

The port of the first communication link on the second OTN device and the port of the second communication link on the third OTN device belong to the MC-SNCP group, and the port of the first communication link on the second OTN device and the port of the second communication link on the third OTN device belong to the MC-SNCP group. There is a mapping relationship between the ports of the two communication links and the MC-SNCP group ID. As an example, the port of the third communication link on the second OTN device and the port of the third communication link on the third OTN also belong to the MC-SNCP group, and the port of the third communication link on the second OTN device and the port of the third There is a mapping relationship between the port of the third communication link on the three OTNs and the MC-SNCP group ID.

Exemplarily, the port of the first MC-LAG link and the port of the second MC-LAG link may belong to the MC-LAG protection group. It can be understood that multiple different MC-LAG groups can be configured on the second OTN device and the third OTN device, and the services transmitted between the second OTN device and the third OTN device for different receiving end devices and originating devices Data is configured with different MC-LAG groups. Different MC-LAG groups are configured between the second OTN device and the third OTN device for different service data transmitted by the same receiving device and transmitting device.

The second OTN device and the third OTN device are configured with an MC-SNCP group and an MC-LAG group. The configuration mentioned here may be configuration by a manager, or the network management device delivers configuration information to the second OTN device and the third OTN device. Exemplarily, the configuration information may include a mapping relationship between the MC-SNCP group ID and the port of the first communication link of the second OTN device and the port of the second communication link of the third OTN device. The configuration information may also include a mapping relationship between the MC-LAG group ID and the port of the first MC-LAG link of the second OTN device and the port of the second MC-LAG link of the third OTN device. Exemplarily, the configuration information may also include the correspondence between the MC-SNCP group ID and the MC-LAG group ID. Therefore, the second OTN device and the third OTN device determine the MC-SNCP group and the MC-LAG group according to the configuration information, and establish an association relationship between the MC-SNCP group and the MC-LAG group. For example, the second OTN device and the third OTN device All OTN devices store the mapping relationship between the MC-SNCP group ID and the MC-LAG group ID.

For example, the working state of the second communication link may be represented by different values. In FIG. 5B , ox00 represents the state of loss of connectivity verification (LOCV), 0x01 represents the state of alarm indication signal (AIS), 0x02 represents the state of SD, and 0x03 represents the state of SF. For another example, the state of the second MC-LAG link may be represented by different values. In FIG. 5B , 0x00 indicates ETH signal loss (loss, los), 0x01 indicates MC-LAG master, and 0x02 indicates MC-LAG backup.

In a possible implementation manner, the second OTN device serving as the master OTN device can control the transmission path of the service data transmitted between the first OTN device and the switching side according to the working status of each communication link. For example, according to the working status of each communication link, the communication status between any two communication links of the first communication link, the third communication link and the first MC-LAG link on the second OTN device is controlled, and the communication status of the second communication link is controlled. The connection state between any two communication links among the second communication link, the third communication link, and the second MC-ALG link on the three OTN devices. Exemplarily, the connection state may include connected and not connected. It can be understood that the connection between the two communication links means that service data is received through one of the two communication links, and the service data is sent through the other communication link. The disconnection of the two communication links can be understood as, after the service data is received through one of the communication links, it will not be sent through the other communication link.

In some embodiments, the second OTN device serving as the master OTN device can control whether the two communication links are connected by configuring the switch states of the ports of the two communication links.

The second OTN device as the master OTN device can configure the switching status of ports on the second OTN device for forwarding service data transmitted between the first OTN device and the switching side according to the working status of each communication link. The port on the second OTN device used to forward the service data transmitted between the first OTN device and the switching side includes the port used to transmit service data on the first communication link, the port used to transmit service on the first MC-LAG link A data port, or one or more of the ports used to transmit business data on the third communication link. For ease of description, the port on the first communication link of the second OTN device is called the first port, the port used to transmit service data on the first MC-LAG link is called the third port, and the third communication link A port used to transmit service data on the road is called a second port. A connection channel may be established between any two of the first port, the second port and the third port.

The second OTN device as the master OTN device can also configure the switching status of ports on the third OTN device for forwarding service data transmitted between the first OTN device and the switching side according to the working status of each communication link. The port used to transmit service data on the third OTN device includes a fourth port used to transmit service data on the second communication link on the third OTN device, a fifth port used to transmit service data on the third communication link, or One or more of the sixth ports on the fifth communication link are used to transmit service data, and there is a connection channel between any two of the fourth port, the fifth port and the sixth port. The second OTN device serving as the master OTN device also sends control information to the third OTN device. For ease of distinction, the control information sent by the second OTN device to the third OTN device is referred to as control information 1 herein. The control information 1 indicates the switch state of the port used to transmit service data on the third OTN device. The port used to transmit the service data on the third OTN device includes the port used to transmit the service data on the second communication link, the port used to transmit the service data on the second MC-LAG link, or the port used to transmit the service data. One or more ports used to transmit the service data on the third communication link.

Exemplarily, the second OTN device can determine the port of the first communication link and the port of the second communication link according to the MC-SNCP group ID, and determine the first MC-LAG group ID according to the MC-SNCP group ID. The port of the LAG link and the port of the second MC-LAG link are further configured to configure the switching status of each port on the second OTN device and the third OTN device.

In some other embodiments, the second OTN device serving as the master OTN device can control whether the two communication links are connected by configuring the connection states of the ports of the two communication links.

The second OTN device controls the connection status of any two ports on the second OTN device for transmitting service data. For example, the communication state between any two ports of the first port, the second port and the third port is controlled. The second OTN device also sends control information to the third OTN device. For ease of distinction, the control information sent by the second OTN device to the third OTN device is referred to as control information 2 herein. The control information 2 indicates the connection state of any two ports used to transmit service data on the third OTN device; for example, control the connection state between any two ports of the first port, the second port and the third port.

In some other embodiments, the second OTN device as the master OTN device can control the selection status of whether the port of the communication link of the second OTN device or the third OTN device sends service data to the other two ports. Whether a communication link is connected. Referring to FIG. 7A , each port can choose to receive data from the other two ports, and after each port receives data, it can choose whether to send data to the other two ports. For example, after the first port receives service data, it can choose to send it to the second port or the third port. For another example, after the second port receives service data, it can choose to send it to the first port or the third port. For another example, after the third port receives service data, it can choose to send it to the first port or the second port.

The second OTN device serving as the master OTN device also sends control information 3 to the third OTN device. The control information 3 indicates the selection state of whether each port on the third OTN device sends service data to the other two ports. For example, after the fourth port receives service data, it can choose to send it to the fifth port or the sixth port. For another example, after the fifth port receives service data, it can choose to send it to the fourth port or the sixth port. For another example, after the sixth port receives service data, it can choose to send it to the fourth port or the fifth port.

In some other embodiments, the second OTN device as the main OTN device can select the selection state of which interface receives service data from the other two ports by configuring the port of the communication link of the second OTN device or the third OTN device. Realize whether the two communication links are connected or not. Referring to FIG. 8A , each port can receive data from the other two ports, and after receiving data, each port can send data to the other two ports. For example, the first port can choose to receive from the second port or the third port. For another example, the second port may choose to receive from the first port or the third port. For another example, the third port may choose to receive from the first port or the second port.

The second OTN device serving as the master OTN device also sends control information 4 to the third OTN device. The control information 4 indicates the selection status of each port on the third OTN device to select to receive service data from the other two ports. For example, controlling the fourth port may choose to receive from the fifth port or the sixth port. For another example, controlling the fifth port may choose to receive from the fourth port or the sixth port. For another example, controlling the sixth port may choose to receive from the fourth port or the fifth port.

In a possible example, the first OTN device may be connected to the network side device, and the first port used to transmit service data on the first communication link of the second OTN device may be called a network-to-network interface (network-to-network interface). networkinterface, NNI). The switching side may be connected to the user side equipment, and the third port configured on the second OTN equipment for transmitting service data on the first MC-LAG link may be called a user-to-network interface (UNI). The second port used to transmit service data on the third communication link configured by the second OTN device may be called a data network interface (data network interface, DNI). Similarly, the third OTN equipment is also configured with UNI, NNI and DNI. For ease of distinction, referring to Figure 7B, the UNI on the second OTN device is called UNI-1 (the third port), the UNI on the third OTN device is called UNI-2 (the sixth port), and the UNI on the second OTN device is called UNI-2 (the sixth port). The NNI of the OTN device is called NNI-1 (first port), the NNI of the third OTN device is called NNI-2 (fifth port), and the DNI of the second OTN device is called DNI-1 (second port) , and the DNI of the third OTN device is called DNI-2 (first port).

As an example, the control information 1 may be transmitted in the message format shown in FIG. 8A. In FIG. 8A , the UNI switch represents the switch state of the port used to transmit service data on the second MC-LAG communication link, that is, the switch state of UNI-2. The NNI switch indicates the switch state of the port used to transmit service data on the second communication link, that is, the switch state of NNI-2. The DNI switch is used to indicate the switch state of the port used to transmit service data on the third communication link, that is, the switch state of DNI-2. For example, the switch state can be represented by different values, 0 means off, 1 means on, or 0 means on, 1 means off, which is not specifically limited in the present application.

As another example, the control information 2 may be transmitted in the message format shown in FIG. 8B. In FIG. 8B, UNI-NNI represents the connection state between UNI-2 and NNI-2. NNI-DNI indicates the connection state between NNI-2 and DNI-2. UNI-DNI indicates the connectivity status between UNI-2 and DNI-2. For example, the connectivity status can be characterized by different values, 0 means not connected, 1 means connected, or 0 means connected, 1 means not connected, which is not specifically limited in the present application.

As yet another example, the control information 3 may be transmitted in the message format shown in FIG. 8C . In FIG. 8C , the UNI switch indicates that UNI-2 chooses to send to NNI-2 or DNI-2. The NNI switch indicates that NNI-2 chooses to send to UNI-2 or DNI-2. DNI indicates that DNI-2 chooses to send to UNI-2 or NNI-2. For example, different values are used to indicate different ports selected. As an example, the value of the UNI switch is 0x00, indicating that NNI-2 is selected, and the value of the UNI switch is 0x01, indicating that DNI-2 is selected. The value of the NNI switch is 0x00, indicating that UNI-2 is selected, and the value of 0x01, indicating that DNI-2 is selected. The value of the DNI switch is 0x00, indicating that UNI-2 is selected, and the value of 0x01, indicating that NNI-2 is selected.

Exemplarily, each port can also choose not to send, and can indicate not to send by not adding a value, or a default value means not to send, or 0x02 means not to send, etc.

As another example, the control information 4 may be transmitted in the message format shown in FIG. 8D . In Fig. 8D, the UNI switch indicates that UNI-2 chooses to receive from NNI-2 or DNI-2. The NNI switch indicates that NNI-2 chooses to receive from UNI-2 or DNI-2. DNI indicates that DNI-2 chooses to receive from UNI-2 or NNI-2. For example, different values are used to indicate different ports selected. As an example, the value of the UNI switch is 0x00, indicating that NNI-2 is selected, and the value of the UNI switch is 0x01, indicating that DNI-2 is selected. The value of the NNI switch is 0x00, indicating that UNI-2 is selected, and the value of 0x01, indicating that DNI-2 is selected. The value of the DNI switch is 0x00, indicating that UNI-2 is selected, and the value of 0x01, indicating that NNI-2 is selected. Exemplarily, each port can also choose not to receive, and can indicate not to receive by not adding a value, or a default value indicates not to receive, or 0x02 indicates not to receive, etc.

In the embodiment of the present application, there may be various scenarios for transmitting service data between the first OTN device and the switching side. In Scenario 1, neither the first communication link nor the first MC-LAG link is faulty. In scenario 2, the first communication link is faulty, and the transmission link of service data needs to be switched. In scenario 3, the first MC-LAG link is faulty, and the service data transmission link needs to be switched. Scenario 4, the second OTN device is faulty, and the transmission link of service data needs to be switched.

The above scenarios will be described below with reference to the accompanying drawings.

In Scenario 1, neither the first communication link nor the first MC-LAG link is faulty, and the service data transmitted between the first OTN device and the switching side can pass through the master OTN device. Referring to FIG. 9A , it is a schematic flowchart of an OTN data transmission method provided by an embodiment of the present application. Take the 1+1 networking deployment mode as an example.

901. After a third communication link is established between the second OTN device and the third OTN device, negotiate which OTN device between the second OTN device and the third OTN device serves as the master OTN device and which serves as the standby OTN device. Here, the second OTN device is used as the master OTN device as an example.

902. The second OTN device serves as the master OTN device, and can set the connectivity status of each communication link of the device. For example, the second OTN device sets that the first communication link is connected to the first MC-LAG link, the first communication link is not connected to the third communication link, and the third communication link is not connected to the first MC-LAG link. .

In an example, it is taken as an example that the second OTN device as the master OTN device can control whether two communication links are connected by configuring switch states of ports of the two communication links. The second OTN device controls the port DNI-1 on the third communication link of the second OTN device to close, the port NNI-1 of the first communication link of the second OTN device to open, and the first MC-LAG of the second OTN device Port UNI-1 of the link is turned on. For example, when the 1+1 deployment mode is adopted, the second OTN device controls the opening of the port NNI-2 of the second communication link of the third OTN device and the closing of the port UNI-2 of the second MC-LAG link, and the third OTN device The port DNI-2 of the third communication link is opened. Exemplarily, the second OTN device sends control information 1-1 to the third OTN device, and the control information 1-1 indicates the working status of ports used to transmit service data on each communication link on the third OTN device. The control information 1-1 indicates that the port UNI-2 on the second MC-LAG link of the third OTN device is closed, and controls the port NNI-2 on the second communication link of the third OTN device and the port UNI-2 on the second communication link of the third OTN device. Port DNI-2 of the three communication links is opened. Under the control of the second OTN device, the transmission link (main link) between the first OTN device and the switching side is: first OTN device -> first communication link -> second OTN device -> first MC-LAG link -> switch side, see Figure 9B.

The first OTN device can send OTN data frames to the second OTN device and the third OTN device respectively in a dual transmission mode, and the third OTN device sends the OTN data frames to the second OTN device through DNI-2 after receiving the OTN data frames . The second OTN device performs selective reception, and selects to receive the OTN data frame from the NNI-1, and the DNI-1 port is closed, and no longer receives the OTN data frame sent by the third OTN device.

In another example, it is taken as an example that the master OTN device can control whether the two communication links are connected by configuring the connection states of the ports of the two communication links. The second OTN device may control NNI-1 to be connected to UNI-1, control NNI-1 to be disconnected from UNI-1, and control DNI-1 to be disconnected from UNI-1. The second OTN device sends control information 1-2 to the third OTN device, the control information 1-2 indicates that NNI-2 is connected to DNI-2, NNI-2 is not connected to UNI-2, and NNI-2 is not connected to UNI-2 . See Figure 9C.

In yet another example, it is taken as an example that the master OTN device can control whether two communication links are connected by configuring whether a port of a communication link sends service data to other two ports of the same OTN device. The second OTN device can control NNI-1 to send service data to UNI-1, control UNI-1 to send service data to NNI-1, and control DNI-1 not to send service data. The second OTN device sends control information 1-3 to the third OTN device, and the control information 1-3 instructs NNI-2 to choose to send to DNI-2, and UNI-2 will not receive the service data, so the third OTN device controls UNI -2 The port to choose to send can be set arbitrarily or by default. DNI-2 will not receive the service data between the first OTN equipment and the switching side.

In another example, it is taken as an example that the master OTN device can control whether the two communication links are connected by configuring the port of the communication link to select and receive the service data of the port of the other two ports of the same OTN device. The second OTN device can control UNI-1 to receive service data from NNI-1, control NNI-1 to receive service data from UNI-1, and control DNI-1 not to receive service data. The second OTN device sends control information 1-4 to the third OTN device, the control information 1-4 instructs DNI-2 to choose to receive service data from NNI-2, and UNI-2 chooses to receive service data from DNI-2 or control UNI-2 Business data is not received. NNI-2 will also not receive the service data between the first OTN equipment and the switching side.

As a possible example, after the second OTN device negotiates with the third OTN device that the second OTN device acts as the primary OTN device and the third OTN device acts as the backup OTN device, the third OTN device can autonomously configure the second communication The switch state of the port of the link is closed and the switch state of the port of the second MC-LAG link is closed.

903. The second OTN device monitors the working status of each communication link of the device in real time.

904. The third OTN device monitors the working status of each communication link of the device in real time, and sends the monitored working status of each link to the device to the second OTN device. Before the second OTN device determines that any link included in the main link or any OTN device fails, it determines to use the main link to transmit service data between the first OTN device and the switching side.

In Scenario 2, the first communication link fails, and transmission link switching needs to be performed. Referring to FIG. 10A , it is a schematic flowchart of an OTN data transmission method provided by an embodiment of the present application.

1001. After a third communication link is established between the second OTN device and the third OTN device, negotiate which OTN device between the second OTN device and the third OTN device serves as the master OTN device and which serves as the backup OTN device. Here, the second OTN device is used as the master OTN device as an example.

1002. The second OTN device serves as the master OTN device, and can set the connectivity status of each communication link of the device. For example, the second OTN device sets that the first communication link is connected to the first MC-LAG link, the first communication link is not connected to the third communication link, and the third communication link is not connected to the first MC-LAG link. . For the setting method, refer to 902, which will not be repeated here.

1003. The second OTN device monitors the working status of each communication link of the device in real time.

1004. The third OTN device monitors the working status of each communication link of the device in real time, and sends the monitored working status of each link to the device to the second OTN device.

1005. When the second OTN device monitors that the first communication link fails, and receives the working status indication of each communication link from the third OTN device through the third communication link, the second communication link is normal, and determines to switch the first OTN The transmission link between the device and the switching side.

The second OTN device controls communication between the third communication link and the first MC-LAG link, and controls the first communication link and the third communication link on the second OTN device. and controlling the disconnection between the first communication link and the first MC-LAG link. The second OTN device controls the connection between the third communication link and the second communication link on the third OTN device, and controls the connection between the second communication link and the second MC-LAG link. and controlling the disconnection between the third communication link and the second MC-LAG link. The second OTN device may send control information 2-1 to the third OTN device, and the control information 2-1 indicates that the third communication link is connected with the second communication link and controls the second communication link Not communicating with the second MC-LAG link, and controlling the disconnection between the third communication link and the second MC-LAG link. Referring to Figure 10B, when the first communication link fails, the second OTN device can switch the transmission link between the first OTN device and the switch side from the main link to the first backup link, and the first backup link can Yes: first OTN equipment -> second communication link -> third OTN equipment -> third communication link -> second OTN equipment -> first MC-LAG link -> switching side.

In the first possible example, the second OTN device configures the working state of the port of the first communication link on the device as off, which can be understood as the switch state of NNI-1 is off. Configure the working state of the port of the first MC-LAG link of this device to be open, which can be understood as the switch state of UNI-1 is open. Configuring the working state of the port of the third communication link on the device to be on may be understood as the switch state of the DNI-1 being on.

As an example, the control information 2-1 may include first indication information, second indication information, and third indication information. The first indication information is used to indicate that the switch state of the port used to transmit service data on the second communication link of the third OTN device is on, and it can be understood that the switch state of NNI-2 is on. The second indication information is used to indicate that the switch state of the port used to transmit service data on the second MC-LAG link of the third OTN device is closed, which can be understood as the switch state of UNI-2 is closed. The third indication information is used to indicate that the switch state of the port used to transmit service data on the third communication link of the third OTN device is on, which can be understood as the switch state of DNI-2 is on.

In the second possible example, the second OTN device configures that NNI-1 and UNI-1 on the device are not connected, NNI-1 and DNI-1 are not connected, and DNI-1 and UNI-1 are connected. The control information 2-1 indicates that the NNI-2 is connected to the DNI-2, the DNI-2 is not connected to the UNI-2, and the NNI-2 is not connected to the UNI-2.

In a third possible example, the second OTN device configures DNI-1 to send service data to UNI-1, and UNI-1 sends service data to DNI-1. The control information 2-1 instructs NNI-2 to choose to send service data to DNI-2, and DNI-2 chooses to send service data to NNI-2. Exemplarily, in this scenario, the switching side receives service data from UNI-1 and sends service data from UNI-1, so that UNI-2 does not send or receive any service data.

In a fourth possible example, the second OTN device configures UNI-1 to receive service data from DNI-1. Configure DNI-1 to receive service data from UNI-1. The control information 2-1 instructs NNI-2 to choose to receive service data from DNI-2, and DNI-2 chooses to receive service data from NNI-2. Exemplarily, in this scenario, the switching side receives service data from UNI-1 and sends service data from UNI-1, so that UNI-2 does not send or receive any service data.

Take the transmission of service data by the first OTN device to the switching side as an example. After the primary link is switched to the first standby link, refer to steps 1006-1008 for the data transmission process.

1006. The first OTN device sends the OTN data frame to the third OTN device through the second communication link.

1007. After receiving the OTN data frame from the first OTN device, the third OTN device sends the OTN data frame to the second OTN device through the third communication link.

1008. The second OTN device receives the OTN data frame from the third OTN device, obtains service data from the OTN data frame, and then sends the service data to the switching side through the first MC-LAG link. Thus, the switching side receives service data from the first OTN device.

In scenario 3, the first MC-LAG link fails, and transmission link switching is required. Referring to FIG. 11A , it is a schematic flowchart of an OTN data transmission method provided by an embodiment of the present application.

1101. After a third communication link is established between the second OTN device and the third OTN device, negotiate which OTN device between the second OTN device and the third OTN device serves as the master OTN device and which serves as the backup OTN device. Here, the second OTN device is used as the master OTN device as an example.

1102. The second OTN device serves as the master OTN device, and can set the connectivity status of each communication link of the device. For example, the second OTN device sets that the first communication link is connected to the first MC-LAG link, the first communication link is not connected to the third communication link, and the third communication link is not connected to the first MC-LAG link. . For the setting method, refer to 902, which will not be repeated here.

1103. The second OTN device monitors the working status of each communication link of the device in real time.

1104. The third OTN device monitors the working status of each communication link of the device in real time, and sends the monitored working status of each link to the device to the second OTN device.

1105. When the second OTN device monitors that the first MC-LAG link fails, and receives the working status indication of each communication link from the third OTN device through the third communication link that the second MC-LAG link is normal, determine Switch the transmission link between the first OTN device and the switching side. The second OTN device sends control information 3-1 to the third OTN device, and the control information 3-1 indicates that any two of the second communication link, the second MC-LAG link, and the third communication link on the third OTN device connectivity of communication links.

The second OTN device controls communication between the first communication link and the third communication link, controls the first communication link and the first MC-LAG link on the second OTN device and controlling the disconnection between the third communication link and the first MC-LAG link. The control information 3-1 indicates that the third communication link is disconnected from the second communication link, controls the disconnection between the second communication link and the second MC-LAG link, and Controlling communication between the third communication link and the second MC-LAG link. As an example, as shown in Figure 11B, when the first MC-LAG link fails, the second OTN device can switch the transmission link between the first OTN device and the switching side from the primary link to the second standby link , the second backup link can be: first OTN equipment -> first communication link -> second OTN equipment -> third communication link -> third OTN equipment -> second MC-LAG link -> swap side.

In the first example, the second OTN device configures the working state of the port of the first communication link on the device as open, which can be understood as the switch state of NNI-1 is open. Configure the working state of the port of the first MC-LAG link of this device to be closed, which can be understood as the switch state of UNI-1 is closed. Configuring the working state of the port of the third communication link on the device to be on may be understood as the switch state of the DNI-1 being on. As an example, the control information 3 may include fourth indication information, fifth indication information, and sixth indication information. The fourth indication information is used to indicate that the state of the port used to transmit service data on the second communication link is closed, which can be understood as the switch state of NNI-2 is closed. The fifth indication information is used to indicate that the state of the port used to transmit service data on the second MC-LAG link is open, and it can be understood that the switch state of UNI-2 is open. The sixth indication information is used to indicate that the state of the port used to transmit service data on the third communication link is open, which can be understood as the switch state of DNI-2 is open.

In the second possible example, the second OTN device configures that the NNI-1 on the device is connected to the UNI-1, the NNI-1 is not connected to the DNI-1, and the DNI-1 is not connected to the UNI-1. The control information 3-1 indicates that there is no communication between NNI-2 and DNI-2, there is communication between DNI-2 and UNI-2, and there is no communication between NNI-2 and UNI-2.

In a third possible example, the second OTN device configures NNI-1 to send service data to DNI-1, and DNI-1 sends service data to NNI-1. Control information 3-1 instructs DNI-2 to choose to send service data to UNI-2, and UNI-2 chooses to send service data to DNI-2. Exemplarily, in this scenario, NNI-2 does not send service data to DNI-2 and UNI-2.

In a fourth possible example, the second OTN device configures DNI-1 to receive service data from NNI-1, and configures NNI-1 to receive service data from DNI-1. The control information 3-1 instructs DNI-2 to choose to receive service data from UNI-2, and UNI-2 chooses to receive service data from DNI-2. Exemplarily, in this scenario, NNI-2 does not receive service data from DNI-2 and UNI-2.

Take the transmission of service data by the first OTN device to the switching side as an example. After the main link is switched to the second standby link, refer to steps 1106-1108 for the data transmission process.

1106. The first OTN device sends the OTN data frame to the second OTN device through the first communication link.

1107. The second OTN device sends the OTN data frame to the third OTN device through the third communication link after receiving the OTN data frame from the first OTN device according to the connection state between the first communication link and the third communication link .

1108. The third OTN device receives the OTN data frame from the second OTN device, obtains service data from the OTN data frame according to the working state of UNI-2, and then according to the connection between the third communication link and the first MC-LAG link The state sends the service data to the switching side through the second MC-LAG link. Thus, the switching side receives service data from the first OTN device.

In Scenario 4, the second OTN device fails, and transmission link switching needs to be performed. Referring to FIG. 12A , it is a schematic flowchart of an OTN data transmission method provided by an embodiment of the present application.

1201. After a third communication link is established between the second OTN device and the third OTN device, negotiate which OTN device between the second OTN device and the third OTN device serves as the master OTN device and which serves as the standby OTN device. Here, the second OTN device is used as the master OTN device as an example.

1202. The second OTN device serves as the master OTN device, and can set the connectivity status of each communication link of the device. For example, the second OTN device sets that the first communication link is connected to the first MC-LAG link, the first communication link is not connected to the third communication link, and the third communication link is not connected to the first MC-LAG link. . For the setting method, refer to 902, which will not be repeated here.

1203. The second OTN device monitors the working status of each communication link of the device in real time.

1204. The third OTN device monitors the working status of each communication link of the device in real time, and sends the monitored working status of each link to the device to the second OTN device.

1205. When the third OTN device detects that the second OTN device fails through the third communication link, upgrade the third OTN device from the backup OTN device to the active OTN device. Set the connectivity status of each communication link of the device. For example, it is set that the second communication link is connected to the second MC-LAG link, the second communication link is not connected to the third communication link, and the third communication link is not connected to the second MC-LAG link.

As an example, heartbeat messages may be exchanged between the second OTN device and the third OTN device to monitor whether the peer device fails.

Referring to Figure 12B, when the second OTN device fails, the third OTN device can switch the transmission link between the first OTN device and the switching side from the main link to the third backup link, and the third backup link can be : first OTN equipment -> second communication link -> third OTN equipment -> second MC-LAG link -> switching side.

In the first possible example, the third OTN device sets the state of the port used to transmit the service data on the second communication link to open, which can be understood as the switch state of NNI-2 is open. Setting the switch state of the port used to transmit the service data on the second MC-LAG to open may be understood as the switch state of UNI-2 is open. Setting the state of the port used to transmit the service data on the third communication link to be off may be understood as the switch state of DNI-2 is on.

In the second possible example, the third OTN device sets that UNI-2 is connected to NNI-2, UNI-2 is not connected to DNI-2, and NNI-2 is not connected to DNI-2.

In a third possible example, the third OTN device configures UNI-2 to receive service data from NNI-2, and NNI-2 receives service data from UNI-2. DNI-2 may not receive service data.

In the fourth possible example, the third OTN device sets NNI-2 to send service data to UNI-2, and UNI-2 sends service data to NNI-2, and DNI-2 will not receive service data. Therefore, for DNI- 2 It can be configured not to send business data to the other two ports, or configured randomly.

In the embodiment of the present application, the active OTN device or the standby OTN device may include a cross-connect unit and a main control unit. The main control unit can complete the communication between any two communication links by controlling the OTN cross-connection of the cross-connection unit. As an example, the UNI, NNI, and DNI may be set on cross-connect boards of each OTN device. The active OTN device or the standby OTN device may further include at least two line units. The branch unit may include one or more branch boards, and the main control unit may include one or more main control boards. A cross-connect unit may include one or cross-connect board, and a line unit may include one or line board. Take the second OTN equipment including OTN line board 1-1, OTN cross-connect board 1, and OTN tributary board 1 as an example. The third OTN equipment includes OTN line board 2-1, OTN cross-connect board 2 and OTN line board 2 as examples.

In a possible example, as shown in FIG. 13 , the second OTN device further includes an OTN line board 1-2, and the third OTN device further includes an OTN line board 2-2. Three ports are configured on the OTN cross-connect board 1 of the second OTN device, and three ports are configured on the OTN cross-connect board 2 of the third OTN device. The OTN line board 1-2 of the second OTN device is connected to the OTN line board 2-2 of the third OTN device.

In another possible example, as shown in FIG. 14 , the second OTN device may further include a main control board 1 , and the third OTN device may further include a main control board 2 . The main control board is the device control information processing board in the OTN device. The second OTN device serves as the master OTN device, and the main control board 1 of the second OTN device works in the "master mode". The third OTN device serves as the backup OTN device, and the main control board 2 of the third OTN device works in the "standby mode".

In some embodiments, the main control board 1 and the main control board 2 use a set protocol to exchange information. For example, the set protocol may be a newly defined protocol. The newly defined protocol may be called the MC-SNCP protocol, and may of course be named by other names, which is not specifically limited in this embodiment of the present application. In the subsequent description, the MC-SNCP protocol is used as an example.

A control channel can be established between the main control board 1 and the main control board 2, and the control channel is used to transmit control information and/or the working status of each link of the standby OTN device. The control channel adopts MC-SNCP agreement. The control channel may be called a data communication network (data communication network, DCN) channel, and may also be named by other names, which is not specifically limited in this application.

The main control board 1 is used to collect status information of each communication link on the second OTN device, including status information of the first communication link, status of the third communication link and status information of the first MC-LAG link. The main control board 1 can obtain the state information of the first communication link from the OTN line board 1-1, and obtain the state information of the first MC-LAG link from the OTN tributary board 1. When the second OTN device adopts the structure shown in FIG. 13 , the main control board 1 can acquire the status information of the third communication link from the OTN line board 1-2.

The main control board 2 is used to collect status information of each communication link on the third OTN device, including status information of the second communication link, status information of the third communication link and status information of the second MC-LAG link. The main control board 2 can obtain the state information of the second communication link from the OTN line board 2 - 1 , and obtain the state information of the second MC-LAG link from the OTN tributary board 2 . When the third OTN device adopts the structure shown in FIG. 13 , the main control board 2 can acquire the state information of the third communication link from the OTN line board 2-2.

The main control board 2 is further configured to send the acquired state information of the second communication link and state information of the second MC-LAG link to the second OTN device through the control channel. The main control board 2 may send the state information of the second communication link and the state information of the second MC-LAG link to the main control board 1 of the second OTN device through the MC-SNCP protocol message format. Exemplarily, the format of the MC-SNCP protocol message used to transmit link state information may be shown in FIG. 5B .

Further, the main control board 1 determines the transmission link for transmitting service data between the first OTN device and the switching side according to the obtained state information of each link on the second OTN device and the state information of each link on the third OTN device . When it is determined that the transmission link needs to be switched, the switching board 1 may be configured to establish a cross-connection among at least two communication boards in the OTN line board 1-1, the OTN line board 1-2, and the tributary board 1. And send the control information to the third OTN equipment through the control channel. The control information is used to instruct the third OTN device to control the switch board 2 to establish a cross-connection among at least two communication boards among the OTN line board 2-1, the OTN line board 2-2, and the tributary board 2.

In some embodiments, when the main control board 1 determines that the first communication link has a fault, the control cross board 1 establishes the cross connection between the OTN line board 1-2 and the tributary board 1; wherein, The cross-connection between the OTN line board 1-1 and the OTN line board 1-2 has not been established, and the cross-connection between the OTN line board 1-1 and the tributary board 1 has not been established. The main control board 2 controls the cross-connection board 2 according to the control information to establish a cross-connection between the OTN line board 2-1 and the OTN line board 2-2; wherein, the OTN line board 2-1 and the tributary board 2 The cross-connection between them has not been established, and the cross-connection between the OTN line board 2-2 and the tributary board 2 has not been established.

In some other embodiments, when the main control board 1 determines that the fourth communication link is faulty, the control cross board 1 establishes a cross connection between the line board 1-1 and the line board 1-2. connection; wherein, the cross-connection between the circuit board 1-1 and the tributary board 1 is not established, and the cross-connection between the circuit board 1-2 and the tributary board 1 is not established.

The main control board 2 is specifically configured to control the cross board 2 to establish a cross connection between the line board 2-2 and the tributary board 2 according to the control information; wherein, the line board 2- The cross connection between 1 and the circuit board 2-2 has not been established, and the cross connection between the circuit board 2-1 and the tributary board 2 has not been established.

Specifically, the main control board 1 establishes a cross-connection or does not establish a cross-connection through the three ports on the cross-connection board 1, UNI-1, NNI-1, and DNI1, so that any two communication links on the second OTN device are connected or not connected. . The main control board 2 establishes a cross-connection or does not establish a cross-connection through the three ports on the cross-connection board 2, UNI-2, NNI-2 and DNI-2, so as to realize the connection or disconnection of any two communication links on the third OTN device.

Exemplarily, the main control board 1 may send the control information to the main control board 2 of the third OTN device in an MC-SNCP protocol format. As an example, after receiving the control information, the main control board 2 configures the switch state of each port on the switch board 2 or the connection state between two ports or the selection state of each port according to the indication of the control information. Exemplarily, the format of the MC-SNCP protocol message used to transmit the control information may be shown in FIG. 8A , FIG. 8B , FIG. 8C or FIG. 8D . The main control board 1 configures the switch state of each port on the switch board 1, and controls the switch state of each port on the switch board 2 of the third OTN device or the connection state between two ports or the selection state of each port through control information, For specific control methods and sent control information, refer to the relevant descriptions in Scenario 1-Scene 3.

In a possible scenario, when the main control board 2 of the third OTN device determines that the second OTN device fails, such as power failure, it may update its own working mode to "main mode". Then configure the switching status of the ports on switch board 2 of the device. For specific configuration methods, refer to the relevant description of Scenario 4, which will not be repeated here.

In a possible implementation manner, as shown in FIG. 15 , both the main control board 1 and the main control board 2 may include an MC-SNCP protocol module and an MC-LAG protocol module. For ease of distinction, the MC-SNCP protocol module included in the main control board 1 is called MC-SNCP protocol module 1, and the MC-SNCP protocol module included in the main control board 2 is called MC-SNCP protocol module 2. The MC-LAG protocol module included in the main control board 1 is called MC-LAG module 1 , and the MC-LAG protocol module included in the main control board 2 is called MC-LAG module 2 . Main control board 1 and main control board 2 save the association relationship between MC-SNCP group and MC-LAG group through configuration. The configuration mentioned here may be configured by a manager, or the network management device sends configuration information to the main control board 1 and the main control board 2 . Exemplarily, the configuration information may include the mapping relationship between the MC-SNCP group ID and the NNI-1 of the second OTN device and the NNI-2 of the third OTN device. The configuration information may also include the mapping relationship between the MC-LAG group ID and the UNI-1 port of the second OTN device and the UNI-2 port of the third OTN device. Exemplarily, the configuration information may also include the correspondence between the MC-SNCP group ID and the MC-LAG group ID. Therefore, the main control board 1 and the main control board 2 determine the MC-SNCP group and the MC-LAG group according to the configuration information, and establish the association relationship between the MC-SNCP group and the MC-LAG group. For example, the main control board 1 and the main control board Both boards 2 store the mapping relationship between the MC-SNCP group ID and the MC-LAG group ID.

It can be understood that multiple different LAG groups can be configured on the second OTN device and the third OTN device, and the configuration of service data transmitted between the second OTN device and the third OTN device for different receiving end devices and originating devices There are different MC-LAG groups. Different MC-LAG groups are configured between the second OTN device and the third OTN device for different service data transmitted by the same receiving device and transmitting device.

The MC-SNCP protocol module 1 is responsible for collecting the working status of the first communication link and the working status of the third communication link on the second OTN device. Specifically, the MC-SNCP protocol module 1 can acquire the working status of the first communication link from the OTN line board 1-1. Optionally, the MC-SNCP protocol module 1 may also acquire the working status of the third communication link from the OTN line board 1-2. MC-LAG module 1 is responsible for collecting the working status of the first MC-LAG link on the second OTN device. Specifically, the MC-LAG module 1 is responsible for obtaining the working status of the first MC-LAG link from the OTN tributary board 1 on the second OTN device. Further, the MC-LAG module 1 sends the acquired working status of the first MC-LAG link to the MC-SNCP module 1 . Exemplarily, the MC-LAG module 1 may notify the MC-SNCP module 1 of the working status of the first MC-LAG link by using the protocol message format shown in FIG. 16A or FIG. 16B .

The working state of the first MC-LAG link may include one or more of an MC-LAG working link, an MC-LAG backup (backup) link, or an ETH signal los. As an example, different values of the MC-LAG state may be used to identify different working states, for example, 0x00 represents the ETH signal los. 0x01 indicates the MC-LAG working link, 0x02 indicates the MC-LAG standby link, etc.

Similarly, the MC-SNCP protocol module 2 is responsible for collecting the working status of the second communication link and the working status of the third communication link on the third OTN device. Specifically, the MC-SNCP protocol module 2 can acquire the working status of the second communication link from the OTN line board 2-1. Optionally, the MC-SNCP protocol module 2 may also acquire the working status of the third communication link from the OTN line board 2-2. The MC-LAG module 2 is responsible for collecting the working status of the second MC-LAG link on the third OTN device. Specifically, the MC-LAG module 2 is responsible for obtaining the working status of the second MC-LAG link from the OTN tributary board 2 on the third OTN device. Further, the MC-LAG module 2 sends the acquired working status of the second MC-LAG link to the MC-SNCP module 2 . Exemplarily, the MC-LAG module 2 may notify the MC-SNCP module 2 of the working status of the second MC-LAG link by using the protocol packet format shown in FIG. 16A or FIG. 16B . The working state of the second MC-LAG link may include one or more of the MC-LAG working link, the MC-LAG backup link, or the ETH signal los.

Further, the SNCP protocol module 2 sends the collected link status information to the SNCP protocol module 1, including, for example, the working status of the second communication link and the working status of the second MC-LAG link. Exemplarily, the format of the MC-SNCP protocol message used to transmit link state information may be shown in FIG. 5B . The SNCP protocol module 1 determines the transmission path of service data between the first OTN device and the switching side according to the obtained state information of each link. Exemplarily, the SNCP protocol module 1 determines the corresponding MC-LAG group ID according to the MC-SNCP group ID, according to the corresponding relationship between the MC-SNCP group ID and NNI-1 and NNI-2, and the relationship between the MC-LAG group ID and the UNI- The mapping relationship between 1 and UNI-2 determines the ports that need to set the switch status, so as to realize the control of the switch status of NNI-1, NNI-2, UNI-1 and UNI-2.

Based on the same inventive concept as the foregoing embodiments, the embodiments of the present application further provide a data transmission device. Specifically, the device may be a main control unit or a main control board. Referring to FIG. 17 , the apparatus may include a receiving unit 1701 , a processing unit 1702 , and a sending unit 1703 . The data transmission apparatus is specifically used to implement the method steps performed by the second OTN device in Figure 9A, Figure 10A, Figure 11A or Figure 12A, or implement the method steps performed by the third OTN device in Figure 9A, Figure 10A, Figure 11A or Figure 12A .

In one scenario, when applied to a second OTN device, the receiving unit 1701 is configured to perform a receiving action, such as receiving a working status of a link from a third OTN device. The processing unit 1702 is configured to configure the connection status of the communication link, and the sending unit 1703 is configured to send control information to the third OTN device, and the overlapping parts will not be repeated here.

In one scenario, when applied to the third OTN device, the receiving unit 1701 is configured to perform a receiving action, such as receiving control information from the second OTN device. The processing unit 1702 is configured to configure the connection status of the communication link, and the sending unit 1703 is configured to send the link status information to the second OTN device, and repeated descriptions are omitted here.

The division of units in the embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processor, or physically exist separately, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

The embodiment of the present application also provides another data transmission device structure, such as an OTN equipment structure. As shown in FIG. 18 , a network device 1800 may include a communication interface 1810 , a processor 1820 and a memory 1830 . The data transmission apparatus may serve as the second OTN device or the third OTN device.

The receiving unit 1701 , the processing unit 1702 , and the sending unit 1703 shown in FIG. 17 above may all be implemented by the processor 1820 . The processor 1820 receives service data or control information status information through the communication interface 1810, and is used to implement the method performed by the second OTN device in FIG. 9A, FIG. 10A, FIG. 11A, or FIG. The method performed by the third OTN device in FIG. 11A or FIG. 12A .

In the implementation process, each step of the processing flow can be completed by the integrated logic circuit of the hardware in the processor 1820 or the instructions in the form of software to complete the second OTN device or the third OTN device described in FIG. 9A, FIG. 10A, FIG. 11A or FIG. 12A The method implemented by the device.

In the embodiment of the present application, the communication interface 1810 may be a circuit, a bus, a transceiver, or any other device that can be used for information exchange. Wherein, for example, the other device may be a device connected to the network device 1800, for example, when the network device 1800 is applied to a communication board, the other device may be a packet switching side or an OTN device.

The processor 1820 in the embodiment of the present application may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may realize or execute Various methods, steps and logic block diagrams disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software units in the processor. The program codes executed by the processor 1820 to implement the above methods may be stored in the memory 1830 . The memory 1830 is coupled to the processor 1820 . The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules. Processor 1820 may cooperate with memory 1830 . The memory 1830 can be a non-volatile memory, such as a hard disk (hard disk drive, HDD) or a solid-state drive (solid-state drive, SSD), etc., and can also be a volatile memory (volatile memory), such as a random access memory (random -access memory, RAM). The memory 1830 is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. Wherein, the storage 1830 may be applied to the network device 1800 in a plug-in form.

In this embodiment of the present application, a specific connection medium among the communication interface 1810, the processor 1820, and the memory 1830 is not limited. In the embodiment of the present application, in FIG. 18, the memory 1830, the processor 1820, and the communication interface 1810 are connected through a bus. The bus is represented by a thick line in FIG. 18. The connection mode between other components is only for schematic illustration. It is not limited. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 18 , but it does not mean that there is only one bus or one type of bus.

Based on the above embodiments, the embodiment of the present application further provides a computer storage medium. A software program is stored in the storage medium, and when the software program is read and executed by one or more processors, the method provided by any one or more embodiments above can be implemented. The computer storage medium may include: various media capable of storing program codes such as U disk, mobile hard disk, read-only memory, random access memory, magnetic disk or optical disk.

Based on the above embodiments, the embodiment of the present application further provides a chip. The chip includes a processor configured to implement the functions involved in any one or more of the above embodiments, such as acquiring or processing the data frames involved in the above methods. Optionally, the chip further includes a memory for necessary program instructions and data executed by the processor. The chip may consist of chips, or may include chips and other discrete devices.

It should be understood that embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction means. The instruction means implements the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the scope of the embodiments of the present application. In this way, if the modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and equivalent technologies, the present application also intends to include these modifications and variations.

Claims (34)

1. A data transmission method for an optical transport network, characterized in that it is applied to an optical transport network comprising at least a first optical transport network OTN device, a second OTN device and a third OTN device, the method comprising: The second OTN device monitors the working status of the first communication link, the third communication link and the fourth communication link, and obtains the working status of the second communication link and the fifth communication link from the third OTN device state; The first communication link is used to connect the second OTN device to the first OTN device, the second communication link is used to connect the first OTN device to the third OTN device, and the third The communication link is used to connect the second OTN device and the third OTN device, the fourth communication link is used to connect the second OTN device and the switching side, and the fifth communication link is used to connect The third OTN device and the switching side; The second OTN device controls the communication between the first OTN device and A transmission path for transmitting the service data between the switching sides. 2. The method of claim 1, further comprising: The second OTN device negotiates with the third OTN device through the third communication link that the second OTN device is an active OTN device, and the third OTN device is a backup OTN device. 3. The method according to claim 1 or 2, wherein obtaining the working status of the second communication link and the fifth communication link from the third OTN device comprises: The second OTN device receives the working status of the second communication link and the working status of the fifth communication link sent by the third OTN device through the third communication link. 4. The method according to any one of claims 1-3, characterized in that, the second OTN device according to the first communication link, the second communication link, the third communication link, the fourth communication link The link and the working state of the fifth communication link control the transmission path through which the service data is transmitted between the first OTN device and the switching side, including: The second OTN device controls the first communication link according to the working status of the first communication link, the second communication link, the third communication link, the fourth communication link, and the fifth communication link , the connection state between any two communication links in the third communication link and the fourth communication link on the second OTN device, and send control information to the third OTN device, the The control information indicates a connectivity state on the third OTN device between any two communication links among the second communication link, the third communication link, and the fifth communication link. 5. The method according to claim 4, characterized in that said controlling communication between any two communication links in said first communication link, said third communication link and said fourth communication link The connectivity status on the second OTN device includes: When the first communication link is faulty and the working states of the second communication link, the third communication link and the fourth communication link are all normal, the second OTN device controlling the communication between the third communication link and the fourth communication link, controlling the disconnection between the first communication link and the third communication link, and controlling the first communication link There is no communication between the road and the fourth communication link. 6. the method as claimed in claim 4 or 5, is characterized in that, described method also comprises: When the first communication link is faulty, the second OTN device receives the OTN data frame sent by the third OTN device through the third communication link, and the OTN data frame carries the information from the first OTN device business data; The second OTN device acquires the service data from the ONT data frame, and sends the service data to the switching side through the fourth communication link. 7. The method according to any one of claims 4-6, wherein there is a fault in the first communication link, and the second communication link, the third communication link and the When the working status of the fourth communication link is normal, the control information indicates that the second communication link is connected to the third communication link, and the second communication link is connected to the fifth communication link. The links are not connected, and the third communication link and the fifth communication link are not connected. 8. The method according to claim 4, characterized in that said controlling communication between any two communication links in said first communication link, said third communication link, and said fourth communication link The connectivity status on the second OTN device includes: When there is a fault in the fourth communication link, and the working status of the first communication link, the third communication link, and the fifth communication link is normal, on the second OTN device, control the communicate between the first communication link and the third communication link, control the disconnection between the first communication link and the fourth communication link, and control the connection between the third communication link and the fourth communication link The fourth communication links are disconnected. 9. The method according to claim 4 or 8, wherein there is a fault in the fourth communication link, and the first communication link, the third communication link and the fifth communication link When the working state is normal, the control information indicates that there is no communication between the second communication link and the third communication link, and the connection between the second communication link and the fifth communication link is controlled Not connected, the third communication link is connected to the fifth communication link. 10. The method according to any one of claims 4, 8-9, further comprising: The second OTN device receives an OTN data frame from the first OTN device through the first communication link; When the fourth communication link fails, the second OTN device sends the OTN data frame to the third OTN device through the third communication link. 11. A data transmission method for an optical transport network, characterized in that it is applied to the optical transport network comprising at least a first optical transport network OTN device, a second OTN device and a third OTN device, the method comprising: The third OTN device receives control information of the second OTN device, where the control information indicates that any two communication links among the second communication link, the third communication link, and the fifth communication link are The connected state on the third OTN device; wherein, the second communication link is used to connect the first OTN device and the third OTN device, and the fifth communication link is used to connect the third OTN device The device and the switching side; the third communication link is used to connect the second OTN device and the third OTN device; The third OTN device controls a connection state between any two communication links among the second communication link, the third communication link, and the fifth communication link according to the control information. 12. The method of claim 11, further comprising: It is negotiated between the third OTN device and the second OTN device through the third communication link that the second OTN device is an active OTN device, and the third OTN device is a backup OTN device. 13. The method of claim 11 or 12, further comprising: The third OTN device monitors the working status of the second communication link and the fifth communication link; The third OTN device sends the working status of the second communication link and the fifth communication link to the second OTN device, and the working status of the second communication link and the fifth communication link The status is used by the second OTN device to determine the control information. 14. The method according to any one of claims 11-13, wherein there is a failure in the first communication link, and the second communication link, the fourth communication link and the third communication link When the link states of the links are all normal, the third OTN device controls any two of the second communication link, the third communication link, and the fifth communication link according to the control information Connected state between, including: The third OTN device controls the communication between the second communication link and the third communication link, and controls the communication between the second communication link and the fifth communication link according to the control information. disconnected, and controlling disconnection between the third communication link and the fifth communication link; Wherein, the first communication link is used for connecting the first OTN device and the second OTN device, and the fourth communication link is used for connecting the second OTN device and the switching side. 15. The method of claim 14, further comprising: The third OTN device receives the OTN data frame from the first OTN device through the second communication link; The third OTN device sends the OTN data frame to the second OTN device through the third communication link. 16. The method according to any one of claims 11-13, wherein there is a fault in the fourth communication link, and the first communication link, the third communication link and the fifth communication link When the working state of the communication link is normal, the third OTN device controls any two of the second communication link, the third communication link, and the fifth communication link according to the control information Connected state between, including: The third OTN device, according to the control information, controls the disconnection between the second communication link and the third communication link, and controls the connection between the second communication link and the fifth communication link are disconnected, and controlling the communication between the third communication link and the fifth communication link; Wherein, the fourth communication link is used for connecting the second OTN device and the switching side, and the first communication link is used for connecting the first OTN device and the second OTN device. 17. The method of claim 16, further comprising: The third OTN device receives the OTN data frame sent by the second OTN device through the third communication link, and the OTN data frame carries service data from the first OTN device; The third OTN device acquires the service data from the ONT data frame, and sends the service data to the switching side through the fifth communication link. 18. The method according to any one of claims 11-17, further comprising: When the third OTN device determines that the second OTN device is faulty, it controls the connection between the second communication link and the fifth communication link, and controls the communication between the second communication link and the third communication link. The communication links are disconnected, and the disconnection between the third communication link and the fifth communication link is controlled. 19. A data transmission device for an optical transport network, characterized in that it is applied to a second OTN device, and the device includes a main control unit and a cross-connect unit; The main control unit is configured to monitor the working status of the first communication link, the third communication link and the fourth communication link, and acquire the working status of the second communication link and the fifth communication link from the third OTN device state; The first communication link is used to connect the second OTN device to the first OTN device, the second communication link is used to connect the first OTN device to the third OTN device, and the third The communication link is used to connect the second OTN device and the third OTN device, the fourth communication link is used to connect the second OTN device and the switching side, and the fifth communication link is used to connect the third OTN device and the switching side; The main control unit is further configured to control the setting of the cross-connection unit according to the working states of the first communication link, the second communication link, the third communication link, the fourth communication link and the fifth communication link The connection relationship between any two communication links in the first communication link, the third communication link and the fourth communication link, and control the second communication link, the third communication link and the fourth communication link on the third OTN device The connection relationship between any two communication links among the five communication links; The crossover unit is configured to set the connection relationship between any two communication links among the first communication link, the third communication link and the fourth communication link under the control of the main control unit. 20. The device according to claim 19, further comprising a first line unit, a second line unit, and a branch unit; the first line unit is connected to the first OTN through a first communication link equipment, the second line unit is connected to a third OTN device through a third communication link, and the branch unit is used to connect to the switching side through a fourth communication link; The main control unit is specifically configured to instruct the cross-connect unit to establish A cross connection between at least two communication units in the first line unit, the second line unit, and the branch unit. 21. The device according to claim 20, wherein the main control unit is specifically configured to, when it is determined that the first communication link has a fault, control the cross unit to establish the connection between the second line unit and the Cross-connection between tributary units; Wherein, the cross-connection between the first line unit and the second line unit is not established, and the cross-connection between the first line unit and the branch unit is not established. 22. The device according to claim 20, wherein the main control unit is specifically configured to, when it is determined that the fourth communication link has a fault, control the cross-connect unit to establish the connection between the first line unit and the a cross-connect between the second line units; Wherein, the cross-connection between the first line unit and the branch unit is not established, and the cross-connection between the second line unit and the branch unit is not established. 23. The apparatus according to any one of claims 20-22, wherein the main control unit is further configured to negotiate with the third OTN device through the third communication link on the second OTN The device is an active OTN device, and the third OTN device is a standby OTN device. 24. The device according to any one of claims 20-24, wherein the main control unit is specifically used for: Obtain the working status of the first communication link from the first line unit, acquire the working status of the third communication link from the second line unit, and acquire the fourth communication link from the branch unit The working status of the link; receiving the working status of the second communication link and the working status of the fifth communication link sent by the third OTN device. 25. The device according to any one of claims 19-24, wherein the main control unit is specifically used for: sending control information to the third OTN device, the control information indicating connectivity between any two communication links in the second communication link, the third communication link, and the fifth communication link relation. 26. A data transmission device for an optical transport network, characterized in that it is applied to a third OTN device in the optical transport network, and the optical transport network also includes a first OTN device and a second OTN device, and the device includes a main control unit and cross unit; The main control unit is configured to receive control information from the second OTN device, the control information indicating that between any two communication links in the second communication link, the third communication link, and the fifth communication link connectivity status on the third OTN device; Wherein, the second communication link is used to connect the first OTN device and the third OTN device, and the fifth communication link is used to connect the third OTN device and the switching side; the third communication link The road is used to connect the second OTN device and the third OTN device; the second communication link, the second communication link and the fifth communication link are used for the first OTN device and the Transmission of business data between switching sides; The main control unit is further configured to control the cross-connect unit to set the communication between any two communication links among the second communication link, the third communication link and the fifth communication link according to the control information. relation; The crossover unit is configured to set a connection relationship between any two communication links among the second communication link, the third communication link and the fifth communication link under the control of the main control unit. 27. The device according to claim 26, further comprising a first line unit, a second line unit, and a branch unit; the first line unit is connected to the first OTN via a second communication link equipment, the second line unit is connected to the second OTN device through the third communication link, and the branch unit is used to connect the switch side through the fifth communication link; The main control unit is specifically configured to instruct the cross unit to establish a cross connection between at least two communication units among the first line unit, the second line unit, and the branch unit according to the control information. 28. The apparatus of claim 27, wherein there is a failure in the first communication link, and the link states of the second communication link, the fourth communication link, and the third communication link are When both are normal, the control information indicates that the second communication link is connected to the third communication link, and the second communication link is not connected to the fifth communication link, so There is no communication between the third communication link and the fifth communication link; the first communication link is used to connect the first OTN device and the second OTN device, and the fourth communication link For connecting the second OTN device and the switching side; The main control unit is specifically configured to control the cross unit to establish a cross connection between the first line unit and the second line unit according to the control information; Wherein, the cross-connection between the first line unit and the branch unit is not established, and the cross-connection between the second line unit and the branch unit is not established. 29. The device according to claim 27, wherein when the fourth communication link is faulty, the control information indicates that there is no connection between the second communication link and the third communication link. connected, the second communication link is not connected to the fifth communication link, and the third communication link is connected to the fifth communication link; The main control unit is specifically configured to control the cross unit to establish a cross connection between the second line unit and the branch unit according to the control information; Wherein, the cross connection between the first line unit and the second line unit is not established, and the cross connection between the first line unit and the branch unit is not established. 30. The device according to any one of claims 27-29, wherein the main control unit is further configured to negotiate with the second OTN device through a third communication link that the second OTN device be The master OTN device, and the third OTN device is a backup OTN device. 31. The device according to any one of claims 27-30, wherein the main control unit is further configured to: acquiring the working status of the second communication link from the first line unit, and acquiring the working status of the fifth communication link from the branch unit; sending the working status of the second communication link and the working status of the fifth communication link to the third OTN device; The working state of the second communication link and the working state of the fifth communication link are used by the second OTN device to determine the control information. 32. A chip characterized by a processor and a communication interface, said communication interface for inputting and/or outputting information; The processor is configured to execute a computer program, so that the method according to any one of claims 1-10 is executed, or the method according to any one of claims 11-18 is executed. 33. A data transmission device, comprising a processor and a memory, wherein: The memory is used to store program codes; The processor is configured to read and execute the program code stored in the memory, so as to realize the method according to any one of claims 1-10, or realize the method according to any one of claims 11-18 . 34. An optical transport network system, characterized by comprising a first optical transport network OTN device, a second OTN device, and a third OTN device, the first OTN device and the second OTN communicate through a first communication link connected, the first OTN device is connected to the third OTN device through a second communication link, the second OTN device is connected to the third OTN device through a third communication link, and the second The OTN device is connected to the switching side through a fourth communication link, and the third OTN device is connected to the switching side through a fifth communication link; the first communication link, the second communication link, the The third communication link, the fourth communication link, and the fifth communication link are used to transmit service data between the first OTN device and the switching side; the second OTN device is used to implement the following: The method according to any one of claims 1-10, wherein the third OTN device is configured to implement the method according to any one of claims 11-18.

Images