CN111885630B - Data transmission method and communication device - Google Patents

Abstract

The application discloses a data transmission method and a communication device. The method comprises the following steps: the method comprises the steps that a first network device receives a first data packet from a second network device, wherein the first data packet comprises first data and a first identifier, the first identifier is used for indicating that a link connected with the second network device in the second network is broken/interrupted, the first network device is a device in the first network, the second network device is a device on a first transmission path of the first data packet, the second network device is a device in the second network, and the first network and the second network are networks using different network protocols; the first network device sends the first data to devices in a second network through a second transmission path, and the devices on the second transmission path do not include the second network device. The embodiment of the application is applied to the process of intercommunication of the PeOTN network and the IPRAN network.

Description

Data transmission method and communication device

technical field

The present application relates to the technical field of communications, and in particular to a data transmission method and device.

Background technique

With the continuous development of the fifth generation (5th generation 5G) technology, the 5G bearer has begun to adopt the internet protocol radio access network (IPRAN) network and the packet enhanced optical transport network (PeOTN). ) network hybrid network to achieve data transmission. For example, devices at the access layer can communicate with each other through the PeOTN network; devices at the core layer can communicate with each other through the IPRAN network. Wherein, the PeOTN network and the IPRAN network may be connected through a user network interface (user network interface, UNI), so as to realize intercommunication between the PeOTN network and the IPRAN network.

Network protection is particularly important when failures occur in the mixed networking of the IPRAN network and the PeOTN network. The normal transmission of data between the IPRAN network and the PeOTN network can be guaranteed through network protection. But most of the existing network protection methods are aimed at single point of failure. For the protection of multi-point failures, for example, if the links on both sides of the aggregation layer device fail at the same time, there is no network protection method. Therefore, how to ensure the normal transmission of data becomes an urgent problem to be solved when multi-point failures occur in the mixed networking of the IPRAN network and the PeOTN network.

Contents of the invention

The present application provides a data transmission method and a communication device, which are used to ensure the normal transmission of data when multi-point faults occur in the mixed networking of the IPRAN network and the PeOTN network.

In order to achieve the above object, the application uses the following technical solutions:

In a first aspect, a data transmission method is provided, the method comprising:

The first network device in the first network receives the first data from the second network device connected to the first network device in the second network and is used to indicate that a link connected to the second network device in the second network fails. /Interrupt the first data packet of the first identification, the second network device is the device on the first transmission path of the first data packet, the first network and the second network are networks using different network protocols; the first network device passes The second transmission path sends the second data to devices in the second network, and the devices on the second transmission path do not include the second network device.

Based on the method in the first aspect, when the first network device receives the first identification from the second network device indicating that the link connected to the second network device in the second network is faulty/interrupted, the first network device may The first data is transmitted through the second transmission path. Since the devices on the second transmission path do not include the second network device, that is, the second transmission path can normally transmit the first data. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

In a second aspect, a communication device is provided, and the communication device includes a communication unit. A communication unit, configured to receive a first data packet from the second network device including the first data and a first identification indicating that a link connected to the second network device in the second network is faulty/interrupted, the first network The device is a device in the first network, the second network device is a device on the first transmission path of the first data packet, the second network device is a device in the second network, and the first network and the second network are different networks The communication unit is further configured to send the first data to devices in the second network through the second transmission path, and the devices on the second transmission path do not include the second network device.

In a third aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium, and when the instructions are executed, the method as described in the first aspect is implemented.

In a fourth aspect, a chip is provided, the chip includes at least one processor and a communication interface, the communication interface is coupled to the at least one processor, and the at least one processor is used to run computer programs or instructions, so as to implement the first aspect. Methods.

According to a fifth aspect, a data transmission method is provided, and the method includes: a second network device in the second network receives the second data from the first network device in the first network, and the first network device communicates with the second The network devices are connected by communication, the first network and the second network are networks using different network protocols; if the second network device detects that the link connected to the second network device in the second network is faulty/interrupted, the second network device sends The first network device sends a first data packet including first data and a first identifier for indicating that a link connected to the second network device in the second network is faulty/interrupted.

Based on the method in the fifth aspect, if the second network device detects that the link connected to the second network device in the second network is faulty/interrupted, the second network device sends a message to the first network device indicating that the link in the second network The identification or information indicating that the link connected to the second network device is faulty/interrupted, so that when the first network device receives the identification or information, it sends the first data to the device in the second network through other normal transmission paths. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

According to a sixth aspect, a communication device is provided, and the device includes a communication unit;

a communication unit, configured to receive a second data packet including first data and first address information from a first network device in the first network, the first network device is communicatively connected to the second network device, and the first address information is for receiving The address information of the device of the first data, the first network and the second network are networks using different network protocols;

The communication unit is further configured to, if the second network device detects that a link connected to the second network device in the second network is faulty/interrupted, send to the first network device including the first data and a link indicating that the link connected to the second network device in the second network The link connected to the second network is faulty/interrupted with the first identification of the first data packet.

In a seventh aspect, a computer-readable storage medium is provided, and instructions are stored in the computer-readable storage medium, and when the instructions are executed, the method according to the fifth aspect is implemented.

In an eighth aspect, a chip is provided, the chip includes at least one processor and a communication interface, the communication interface is coupled to the at least one processor, and the at least one processor is used to run computer programs or instructions, so as to implement the fifth aspect. Methods.

Wherein, the device or computer-readable storage medium or computer program product or chip provided above is used to execute the corresponding method provided above, therefore, the beneficial effects that it can achieve can refer to the corresponding method provided above The beneficial effects of the corresponding solution will not be repeated here.

Description of drawings

FIG. 1 is a simplified structural schematic diagram of a communication network provided by an embodiment of the present application;

FIG. 2 is a simplified structural schematic diagram of another communication network provided by an embodiment of the present application;

FIG. 3 is a simplified structural schematic diagram of another communication network provided by an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

FIG. 5 is a schematic flow diagram of a data transmission method provided by an embodiment of the present application;

FIG. 6 is a schematic flow diagram of another data transmission method provided by the embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication device 70 provided in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device 80 provided in an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a communication system provided by an embodiment of the present application.

Detailed ways

Before introducing the embodiments of the present application, some nouns involved in the embodiments of the present application are explained:

PeOTN network: refers to the combination of traditional optical transport network (OTN) and packet transport network (PTN) technology, not only has the packet processing capability of PTN, but also has the ultra-large capacity bandwidth and A network that can transmit data over long distances. Devices on the network side can use the PeOTN network to complete data collection and transmission tasks, improving network utilization. Wherein, devices in the PeOTN network may use a multi-protocol label switch transport profile (MPLS-TP) protocol to implement intercommunication.

IPRAN network: refers to the Internet protocol (internet protocol, IP)/MPLS and key technologies as the basis, mainly for mobile service bearer and also provides two-layer and three-layer channel service bearer, with the province as the unit, relying on China Telecom's next-generation bearer network (China Net Next Carrying Network, CN2) is an end-to-end service carrying network composed of the backbone layer. Among them, devices in the IPRAN network can use the MPLS protocol to implement intercommunication.

As shown in FIG. 1 , it is a simplified schematic diagram of a communication network provided by an embodiment of the present application. The communication network may include a service network element, a core layer, a convergence layer, and an access layer. Wherein, the service network element may include multiple network element devices, the core layer may include multiple core devices, and the core device may also be called a core node. The aggregation layer may include multiple aggregation devices, and the aggregation devices may also be called aggregation nodes. Among the plurality of convergence devices, the device type of the convergence device connected to the core device is different from the device type of the convergence device connected to the access layer among the plurality of convergence devices. The access layer may include multiple access devices. The plurality of access devices may include a primary access point and a terminal access point. Table 1 shows the functions, equipment types and grades, and infrastructure of the above-mentioned network element equipment, core equipment, convergence equipment, and access equipment.

Table 1

It should be noted that the device functions, device types and grades, and infrastructure of the devices in Table 1 are only exemplary. With the development of network technology, the device functions, device types, grades, and infrastructure of the devices can also be adjusted according to needs. configuration, without limitation. Of course, other devices may also be included in FIG. 1 and Table 1, for example, an active antenna processing unit (active antenna unit, AAU). Wherein, the function and basic structure of the AAU can refer to the existing technology, and will not be described in detail.

Hybrid networking of IPRAN network and PeOTN network: refers to the way of hybrid networking of IPRAN network and PeOTN network. Connected aggregation devices can be connected through PeOTN network communication; core layer devices, and aggregation devices connected to core layer devices in the aggregation layer can be connected through IPRAN network communication.

As shown in FIG. 2 , it is a simplified schematic diagram of another communication network provided by the embodiment of the present application. As shown in FIG. 2, the communication network may include network equipment 210, access equipment (such as access equipment 221, access equipment 222, and access equipment 223 in FIG. 2), aggregation equipment 230, aggregation equipment 240, and bearer equipment. 250. Wherein, the bearer device 250 may include a 5G bearer device and an IP bearer device.

Wherein, the network device 210 may be connected to the access device 220 through an Ethernet virtual private line (ethernet virtual private line, EVPL).

Wherein, the access device 220 and the converging device 230 may be connected through a PeOTN network. Static PWs and tunnels can be used to establish services between the access device 220 and the aggregation device 230 . For example, EVPL business.

It should be noted that there are active and standby PWs between the access device 221, the access device 222, and the access device 223, and each PW is configured with LSP1:1.

Wherein, the convergence device 230 and the convergence device 240 may be connected through a UNI interface. The aggregation device 240 may be connected through an IPRAN network.

It should be noted that, in this application, the core aggregation layer is configured with a three-layer virtual private network (layer virtual private network, L3 VPN). The access layer is configured with L2 VPN. Devices at the core aggregation layer can transmit services from the access layer to the L3 VPN through L2-to-L3 transfer. That is, the intercommunication between the PeOTN network and the IPRAN network is realized. Wherein, the manner of transferring from L2 to L3 may refer to the prior art, and details are not repeated here.

It should be noted that, in the embodiment of the present application, each service may be configured with a corresponding service virtual local area network (virtual local area network, vlan) according to the service type. When a network device sends a service to the core convergence layer through the access network, the IP address of the network device is in one-to-one correspondence with the downlink logical sub-interfaces of the IPRAN network in the core convergence layer.

The following describes the service transmission process between the IPRAN network and the PeOTN network:

1. When the PeOTN network sends services to the IPRAN network, the device at the access layer can encapsulate the service from the network device into a PW according to the port (port)+vlan, and transmit the service to the device at the aggregation layer (PeOTN network) through the tunnel, and the aggregation Layer equipment forwards the service to the IPRAN network;

2. When the IPRAN network sends a service to the PeOTN network, the device at the convergence layer (PeOTN network) identifies the downlink logical sub-interface of the IPRAN network and encapsulates the service into the PW. Then, the device at the aggregation layer sends the service to the access layer (PeOTN network) according to the downlink logical sub-interface and tunnel corresponding to the service. The device at the access layer identifies the port+vlan on the client side corresponding to the PW and sends it to the client side (or terminal or network device).

It should be noted that the layer-3 gateway between the device at the access layer and the device at the aggregation layer can be configured according to the N:1 model. That is, N VLANs at the access layer correspond to one sub-interface of the IPRAN. The sub-interface may be a Dot1q VLAN sub-interface or a super (super) vlan sub-interface, without limitation.

Network protection: Network protection means that when the network fails, in order to ensure the normal transmission of business data, the network can be protected through various network protection methods. For example, the multiple network protection modes may include tunnel protection, service protection, and so on. The following describes tunnel protection and service protection.

1. Tunnel protection can also be called label switching path (label switching path, LSP) 1:1 protection, which is a basic protection mode of the IPRAN network. Tunnel protection refers to establishing the LSP backup tunnel while establishing the LSP primary tunnel, and delivering the LSP backup tunnel to the forwarding device at the same time. When the primary tunnel fails, services can be quickly switched to the backup tunnel.

2. Service protection refers to the protection mode that the equipment at the access layer adopts pseudowire (Pseudo wire, PW) redundancy, and the aggregation core layer adopts virtual private network fast reroute (VPN FRR). Wherein, PW redundancy refers to establishing a backup PW and a bypass PW (BypassPW) at the same time as establishing an active PW. When the main PW fails, the service can be switched to the backup PW, and then sent from the BypassPW to the network device receiving the service.

At present, when a single point of failure occurs in the mixed network of the above-mentioned IPRAN network and PeOTN network, various protection methods can be used to protect it, for example, the failure of the protection aggregation IPRAN equipment, the failure of the connecting link between IPRAN and PeOTN, the failure of the PeOTN convergence point equipment, and the failure of the IPRAN Link or node failure in the network, link or node failure in the PeOTN network, etc. For the various protection modes, reference may be made to the prior art, and details are not repeated here.

For example, the core aggregation layer can configure label distribution protocol (label distribution protocol, LDP) FRR/traffic engineering hot standby (traffic engineering hot standby, TE HSB) to provide link protection according to the deployment of the tunnel layer LDP/RSVP-TE protocol. , configure VPN FRR to provide node protection.

For another example, if a link at the core aggregation layer fails, LDP FRR/TE Hotstandby can be used to switch to the backup LSP to ensure normal service transmission.

For another example, if the aggregation layer fails, it can be switched to the next hop protection through VPN FRR. If the core node fails, the upstream traffic VPN FRR switches to the next protection route, and the core network downstream traffic is protected by the active and standby routes.

For another example, if the interconnection link of the access layer fails, the IPRAN network and the PeOTN network can be protected by address resolution protocol (address resolution protocol, ARP) dual transmission or virtual router redundancy protocol (virtual routerredundancy protocol, VRRP).

For another example, if the link at the access layer fails, the PeOTN network can adopt PW redundancy or LSP 1:1 protection.

It should be noted that the above-mentioned single point fault and single point fault protection method are only exemplary, and may also include other single point faults and single point fault protection methods, which are not limited.

If the hybrid network of the IPRAN network and the PeOTN network mentioned above has a multi-point fault, since the IPRAN network and the PeOTN network use different network protocols, it is difficult to protect the multi-point fault.

In the following, the communication network shown in FIG. 3 will be combined with a description of a multi-point failure and a protection method when a multi-point failure occurs.

In the communication network shown in FIG. 3 , the communication network may include a first network 310 and a second network 320 . Wherein, the first network 310 may include a first network device 311 , a first network device 312 , a first network device 313 , a first network device 314 , a first network device 315 , and a first network device 316 . The second network 320 may include a second network device 321 , a second network device 322 , a second network device 323 , a second network device 324 , and a second network device 325 . The first network 310 may be communicatively connected with the second network 320 . For example, the first network device 314 is connected to the second network device 323 , and the first network device 313 is connected to the second network device 325 . Wherein, the first network device 314 and the second network device 323 may be connected through the UNI1 interface, and the first network device 313 and the second network device 325 may be connected through the UNI2 interface. Of course, the first network device 314 and the second network device 323, and the first network device 313 and the second network device 325 may also be connected through other interfaces, which are not limited.

Wherein, the first network device 311 is connected to the first network device 316 through the link 1 and connected to the first network device 312 through the link 6 . The first network device 316 is connected to the first network device 315 through the link 2 . The first network device 315 is connected to the first network device 314 through the link 3 . The first network device 314 is connected to the first network device 313 through a link 4 . The first network device 313 is connected to the first network device 312 through a link 5 .

Wherein, the second network device 321 is connected to the second network device 322 through the link 11 , and is connected to the second network device 324 through the link 12 . The second network device 322 is connected to the second network device 323 through the link 10 and connected to the second network device 324 through the link 12 . The second network device 323 is connected to the second network device 325 through the link 7 . The second network device 325 is connected to the second network device 324 through the link 8 .

In this embodiment of the application, multi-point failure may refer to the failure/interruption of link 3 and link 4 connected to the first network device 314, or may refer to link 3 and link 3 connected to the first network device 313. Failure/interruption of link 4, or, may refer to failure/interruption of link 7 and link 10 connected to the second network device 323, or may refer to link 7 and link 10 connected to the second network device 325. Road 8 is faulty/interrupted.

Wherein, the first network 310 may be an IPRAN network, and the second network 320 may be a PeOTN network. Alternatively, the second network 320 may be an IPRAN network, and the first network 310 may be a PeOTN network, without limitation. In the following, description will be made by taking the first network 310 as an IPRAN network and the second network 320 as a PeOTN network as an example.

In a possible implementation manner, a port between the IPRAN network and the PeOTN network or a detection protocol on a link in the network may be bound to each other. When the links connected to devices in network 1 (such as IPRAN network) fail at the same time, for example, link 7 and link 10 fail/interrupt, network 2 (such as PeOTN network) can trigger the shutdown of the connection between the two networks Interconnect port lasers, or trigger the detection protocol of the link between network 1 and network 2 to go down (down), and send a message to the device in network 1 (such as the first network device 314) to indicate the connection between network 1 and network 2 Link failure alarm information. Devices in network 1 receive the alarm information and can determine that the link between network 1 and network 2 is faulty. Therefore, the equipment in the network 1 can change the transmission path, or it can be described as that the equipment in the network 1 can trigger protection switching to change the transmission path.

Based on this technical solution, when the link in network 1 fails, the protocol down of the link between network 1 and network 2 can be triggered, so that the devices in network 2 can perceive the link between network 1 and network 2. The path fails, that is, the devices in the network 2 can determine that the original transmission path cannot transmit data. Therefore, the devices in the network 2 can change the transmission path to ensure the normal transmission of data.

However, in the above solution, when multiple links of network 1 fail, a link failure between network 1 and network 2 is triggered, and devices in network 2 can perform protection switching. However, when troubleshooting, the O&M personnel need to check multiple links of the network 1 and the link between the network 1 and the network 2, thereby increasing the workload of the O&M personnel.

Based on this, an embodiment of the present application provides a data transmission method, the method includes: the first network device in the first network receives the first data from the second network device connected to the first network device in the second network; and a first data packet with a first identifier used to indicate that a link connected to the second network device in the second network is faulty/interrupted, the second network device is a device on the first transmission path of the first data packet, and the second network device is a device on the first transmission path of the first data packet. The first network and the second network are networks using different network protocols; the first network device sends the second data packet to the devices in the second network through the second transmission path, and the devices on the second transmission path do not include the second network device.

Based on the method provided in the embodiment of the present application, when the first network device receives the first identifier from the second network device indicating that the link connected to the second network device in the second network is faulty/interrupted, the first The network device can transmit the first data through the second transmission path. Since the devices on the second transmission path do not include the second network device, that is, the second transmission path can normally transmit the first data. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

The method provided by the embodiment of the present application will be described below with reference to the drawings in the description.

In addition, FIG. 3 is only an exemplary drawing, and the number of devices included in FIG. 3 is not controlled, and in addition to the devices shown in FIG. 3 , the communication network may also include other devices, for example, an SDN controller. Wherein, a software defined network (software defined network, SDN) controller may be used to collect topology information and link state information of the entire network. It can also be used to assign a label or identification to each network device in the network.

Wherein, the topology information may include routing information among multiple network devices. Link state information may include bandwidth, data transmission rate, delay, etc. of routes between multiple network devices.

For example, the routing information between the first network device 311 and the second network device 321 may include: first network device 311→first network device 316→first network device 315→first network device 314→second network device 323→ Second network device 322→second network device 321, first network device 311→first network device 312→first network device 313→second network device 325→second network device 324→second network device 321, etc.

In addition, the name of each network device in FIG. 3 is not limited, and each network device may be named other than the names shown in FIG. 3 without limitation.

In specific implementation, each device shown in FIG. 3 may adopt the composition structure shown in FIG. 4 , or include the components shown in FIG. 4 . FIG. 4 is a possible structural diagram of a communication device provided by an embodiment of the present application. The communication device is, for example, the aforementioned first network device and second network device. The communication device 400 may be a chip or a system-on-a-chip in the first network device or the second network device. As shown in FIG. Further, the communication device 400 may further include a memory 405 . Wherein, the processor 401, the transmitter 402, the receiver 403, and the physical interface 404 may be connected through a communication line.

Wherein, the processor 401 is a central processing unit (central processing unit, CPU), a general-purpose processor, a network processor (network processor, NP), a digital signal processor (digital signal processing, DSP), a microprocessor, a microcontroller, Programmable logic device (programmable logic device, PLD) or any combination thereof. The processor 401 may also be other devices with processing functions, such as circuits, devices or software modules, without limitation.

The transmitter 402 and the receiver 403 are used to communicate with other devices or other communication networks. The other communication network may be an Ethernet, a radio access network (radio access network, RAN), a wireless local area network (wireless local area networks, WLAN), and the like. The transmitter 402 and the receiver 403 may be modules, circuits, transceivers or any device capable of realizing communication. The transmitter 402 and the receiver 403 may be physically independent from each other or integrated together.

Transmitter 402 may transmit data packets to neighboring devices via physical interface 404 . The receiver 403 may receive data packets sent by adjacent devices through the physical interface 404 .

The memory 405 is used for storing instructions. Wherein, the instruction may be a computer program.

Wherein, the memory 405 may be a read-only memory (read-only memory, ROM) or other types of static storage devices capable of storing static information and/or instructions, or may be a random access memory (random access memory, RAM) or capable of storing Other types of dynamic storage devices for information and/or instructions can also be electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) ) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disc storage media or other magnetic storage devices, etc., without limitation.

It should be noted that the memory 405 may exist independently of the processor 401 or may be integrated with the processor 401 . The memory 405 may be used to store a routing table, and may also store instructions or program codes or some data. The memory 405 may be located in the communication device 400 or outside the communication device 400, without limitation. The processor 401 is configured to execute instructions stored in the memory 405 to implement the data transmission provided by the following embodiments of the present application.

In an example, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 4 .

As an optional implementation manner, the communications apparatus 400 includes multiple processors, for example, in addition to the processor 401 in FIG. 4 , it may further include a processor 406 .

It should be noted that the communication device 400 may be a router, a switch, an embedded device, a chip system or a device having a structure similar to that shown in FIG. 4 . In addition, the composition structure shown in FIG. 4 does not constitute a limitation to the communication device. In addition to the components shown in FIG. 4, the communication device may include more or less components than those shown in the illustration, or combine certain components , or different component arrangements.

In the embodiment of the present application, the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.

In addition, actions, terms, etc. involved in various embodiments of the present application may refer to each other without limitation. In the embodiment of the present application, the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited.

The terms "first", "second" and "third" in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to limit a specific order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

The following describes the data transmission method provided by the embodiment of the present application by taking the communication network architecture shown in FIG. 3 as an example. Each device in the following embodiments may have the components shown in FIG. 4 , which will not be described in detail.

The actions and terms involved in the various embodiments of the present application may refer to each other without limitation. In the embodiment of the present application, the names of messages exchanged between various devices or the names of parameters in messages are just examples, and other names may also be used in specific implementations, which are not limited. The actions involved in the various embodiments of the present application are just examples, and other names may also be used in specific implementations, for example, the "included in" described in the embodiments of the present application may also be replaced with "carried on" or "carried in".

Figure 5 provides a data transmission method for the embodiment of the present application, as shown in Figure 5, the method includes:

Step 501, a first network device receives a first data packet from a second network device.

Wherein, the first network device may be a network device connected to the second network 320 in FIG. 3 , for example, the first network device may be the first network device 314 or the first network device 313 in FIG. 3 .

Wherein, the second network device may be a network device connected to the first network device in FIG. 3 , and the second network device may be a network device on the first transmission path of the first data packet. The first transmission path is used to transmit the first data. For example, when the first transmission path is first network device 311→first network device 316→first network device 315→first network device 314→second network device 323→second network device 322→second network device 321 , the second network device may be the second network device 323. When the first transmission path is first network device 311→first network device 312→first network device 313→second network device 325→second network device 324→second network device 321, the second network device may be the first Two network devices 325 .

Wherein, the first data packet includes first data and a first identifier. The first identifier is used to indicate that a link connected to the second network device in the second network is faulty/interrupted. The link connected to the second network device in the second network refers to a link between the second network device and an adjacent network device in the second network. That is, the second network device cannot send data to other network devices in the second network. For example, the links connected to the second network device 323 may include link 10 and link 7 . Links connected to the second network device 325 may include Link7 and Link8. The first data may also include other information, for example, destination address information of the first data packet. The target address information may be an identifier or an IP address of the network device receiving the first data, without limitation. The identifier of the network device and the IP address are used to uniquely identify a network device.

Wherein, the first data may be data sent by the device in the first network to the second network when the device in the first network receives a request from the device in the second network.

For example, when the second network is a PeOTN network and the first network is an IPRAN network, the second network may be a network in the access layer, and the first network may be a network in the core aggregation layer. If the access layer receives the first service request from the terminal for requesting the first data, the access layer may forward the first service request to the core convergence layer. Correspondingly, when the core convergence layer receives the first service request from the access layer, it can obtain the first data (for example, obtain the first data from the network or server corresponding to the first service), and send the first service request to the access layer. data.

An example, taking the second network device 321 as the sink network device and the first network device 311 as the source network device as an example, after the first network device 311 receives the first service request, it can obtain the first data and pass the first The transmission path sends the data packet including the first data to the second network device 321 .

Wherein, the source network device refers to the network device that acquires the first data, and the sink network device refers to the network device that receives the first data. The source network device and the sink network device are devices in different networks.

If a device in the access layer detects that a multi-point failure occurs, it may send the first data packet to the core layer. For example, when the second network device 323 on the first transmission path receives the first data from the first network device 314, if the second network device 323 detects that all the links 7 and 10 are faulty/interrupted, it can send The first network device sends the first data packet.

Wherein, the first identifier may be used to indicate that a link connected to the second network device in the second network is faulty/interrupted.

In an example, the first identifier may include multiple bits. Each bit in the multiple bits corresponds to a link, and different states of a link correspond to different bit values. For example, when the bit value is 0, it indicates that the link corresponding to the bit is faulty/interrupted; when the bit value is 1, it indicates that the link corresponding to the bit is normal. For example, the bit corresponding to link 3 is 0011-X, the bit corresponding to link 4 is 0100-X, the bit corresponding to link 5 is 0101-X, the bit corresponding to link 7 is 0111-X, and the bit corresponding to link 8 is The bit of link 10 is 1000-X, and the bit corresponding to link 10 is 1011-X. X is used to indicate the state of the link. For example, when the value of X is 1, it indicates that the link is normal; when the value of X is 0, it indicates that the link is faulty/interrupted.

For example, when the link 7 and the link 10 connected to the second network device 323 fail/interrupt, the first identifier may be 0111-0~1011-0; when the link 7 and the link connected to the second network device 325 When the link 8 is faulty/interrupted, the first identifier may be 0111-0 to 1000-0.

In another example, the first identifier may be a preset symbol, for example, the first identifier may be a VLAN number, such as VLAN4000. Certainly, the first mark may also be other symbols, which are not limited.

Step 502, the first network device sends the first data to the device in the second network through the second transmission path.

Wherein, the devices on the second transmission path do not include the second network device. For example, when the first transmission path is first network device 311→first network device 316→first network device 315→first network device 314→second network device 323→second network device 322→second network device 321, When the second network device is 323, the second transmission path may be the first network device 313→the second network device 325→the second network device 324→the second network device 321. The device in the second network may be the second network device 325 .

It should be noted that, when the first network device receives the first data packet including the first identifier, it may send the first data and the first address information to a network device connected to the second network in the first network. Wherein, the first address information may be address information of a network device receiving the first data. After receiving the first data, the network device connected to the second network in the first network can continue to send the first data to the second network until the first data is sent to the network device corresponding to the first address information, so that the data can be guaranteed normal transmission.

For example, when the first network device 314 receives the first data packet from the second network device 323 , the first network device 314 may send a data packet including the first data to the first network device 313 . After receiving the data packet including the first data from the first network device 314 , the first network device 313 may send the data packet to the second network device 325 . Since the link connected to the second network device 325 is normal, normal transmission of data can be guaranteed.

For another example, when the first network is an IPRAN network and the second network is a PeOTN network, when the first network device receives the first data packet, the first network device may forward the first data to the first network device in a PW forwarding manner. A network device in the network connected to the second network. Wherein, the PW forwarding manner may refer to the prior art, and will not be described in detail.

Based on the method in FIG. 5, when the first network device receives the first identification from the second network device indicating that the link connected to the second network device in the second network is faulty/interrupted, the first network device can pass The second transmission path transmits the first data. Since the devices on the second transmission path do not include the second network device, that is, the second transmission path can normally transmit the first data. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

In a possible implementation of the method shown in Figure 5, the implementation of the data transmission method provided by the present application may also include:

If the first network device receives the first data packet from the second network device, the first network device may also send the first indication information to the source network device.

Wherein, the source network device refers to the network device that acquires the first data. For example, the source network device may be any network device in FIG. 3 , for example, it may be the first network device 311 .

Wherein, the first indication information may be used to indicate the second transmission path, and the second transmission path is used for sending data. Alternatively, the first indication information may be used to indicate to update the transmission path. Wherein, the network devices on the second transmission path and the updated transmission path do not include the second network device with a link failure.

For example, when the first indication information is used to indicate the second transmission path, the first indication information may include identification information of multiple network devices, and the multiple network devices are network devices of the second transmission path. When the first indication information is used to indicate to update the transmission path, the first indication information may include one or more identification bits, and when the one or more identification bits are the first value, it indicates that the transmission path for sending the first data is updated. For example, the first value may be T1, indicating that the transmission path is updated.

Based on this possible implementation, when the source network device receives the first indication information, the source network device may update the current transmission path when subsequently sending data to devices in the second network, so as to ensure normal transmission of subsequent data.

In another possible implementation of the method shown in FIG. 3, if the second network device detects that the link connected to the second network device in the second network returns to normal, the second network device sends a message to the first network device Second instruction message. When the first network device receives the second indication information from the second network device, the first network device may send third indication information to the source network device.

Wherein, both the second indication information and the second indication information may be used to indicate that the link connected to the second network device in the second network returns to normal. For example, the second indication information may include a second identifier. The description of the second identifier may refer to the first identifier, and details are not repeated here.

It should be noted that, after receiving the third indication information, the source network device may send data according to the current transmission path, or may update the current transmission path to the first transmission path, without limitation.

Based on this possible implementation, when the source network device receives that the link in the second network is back to normal, the source network device increases the selectivity of the transmission path when sending data to the second network.

The method shown in FIG. 5 will be described in detail below in conjunction with the communication network in FIG. 3 .

As shown in Figure 6, another data transmission method provided by the embodiment of the present application includes:

Step 601, the first network device sends a second data packet to the second network device. Correspondingly, the second network device receives the second data packet from the first network device.

Wherein, the second data packet includes the first data. Certainly, the second data packet may include other information, for example, may also include the first address information. The first address information may be a network device receiving the first data in the second network. For example, the first address information may be address information of the second network device 321 . For example, the first address information may be an IP address, or an identifier of the second network device, without limitation.

Step 602, the second network device detects whether a link connected to the second network device in the second network is faulty/interrupted.

In a possible implementation manner, the second network device may actively send a request through the link connected to the second network device, and the request is used to detect whether the link connected to the second network device in the second network is normal. For example, the second network device may periodically send requests through all links connected to the second network device in the second network, or, after receiving the data packet sent by the first network device, the second network device may, if the The data packet includes a transmission path, and the second network device can send the data packet according to the transmission path; if the second network device does not receive a response from the adjacent network device for receiving the data packet, the second network device can determine that it is connected to the adjacent network The link between the devices is down/broken.

In yet another possible implementation manner, the network device connected to the second network device may periodically send heartbeat information to the second network device through a corresponding link. If the second network device does not receive the heartbeat information of the network devices corresponding to all the links within the preset time, the second network device may determine that the link connected to the second network device fails, or, the link connected to the second network device The network device corresponding to the link is faulty. That is, the second network device cannot continue to forward the first data.

In a case where the second network device detects that a link connected to the second network device in the second network is faulty/interrupted, the second network device may generate the first identifier. In order to prevent loss of the first data, the second network device may encapsulate the first identifier and the first data into a first data packet.

If the second network device detects that a link connected to the second network device in the second network is faulty/interrupted, step 603 is executed.

Step 603, the second network device sends the first data packet to the first network device. Correspondingly, the first network device receives the first data packet from the second network device.

Step 604, the first network device sends the first data to the device in the second network through the second transmission path. Correspondingly, devices in the second network receive the first data.

Wherein, step 603 and step 604 may refer to step 501 and step 502 in FIG. 3 , and details are not repeated here.

Step 605, the first network device sends the first indication information to the source network device. Correspondingly, the source network device receives the first indication information from the first network device.

Step 606, the source network device updates the transmission path.

Wherein, the updated transmission path does not include the second network device.

Wherein, the description of step 605 and step 606 may refer to the first possible implementation manner shown in FIG. 3 , and details are not repeated here.

Step 607 (optional), the second network device detects whether the link connected to the second network device in the second network returns to normal.

Wherein, if it returns to normal, the second network device performs step 608 and step 609 .

Step 608 (optional), the second network device sends second indication information to the first network device. Correspondingly, the first network device receives the second indication information from the second network device.

Step 609 (optional), the first network device sends third indication information to the source network device. Correspondingly, the source network device receives third indication information from the first network device.

Wherein, the description of step 607, step 608 and step 609 may refer to the second possible implementation manner shown in FIG. 3, and details are not repeated here.

It should be noted that, in this embodiment of the application, when a multi-point failure occurs in the second network, the device in the first network sends data to the second network as an example. When a multi-point failure occurs in the second network, the second network When the devices in the second network send data to the first network, because there is a communication relationship between the devices in the second network, each device in the second network can actively change the transmission path when it detects that a multi-point failure occurs in the network. Alternatively, the devices in the second network may change the transmission path or the next-hop device after receiving instructions from other devices. Thus, the normal transmission of data can be guaranteed.

Wherein, when the first network sends multi-point faults, and the devices in the second network send data to the first network, the method shown in the above-mentioned embodiments may be referred to, and details are not repeated here.

Based on the method in FIG. 6, when the first network device receives the first identification from the second network device indicating that a link adjacent to the second network device in the second network is faulty/interrupted, the first network device may The first data is transmitted through the second transmission path. Since the devices on the second transmission path do not include the second network device, that is, the second transmission path can normally transmit the first data. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

The solutions in the above embodiments of the present application can be combined under the premise of no contradiction.

The embodiment of the present application can divide the communication device into functional modules or functional units according to the above method example, for example, each functional module or functional unit can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented not only in the form of hardware, but also in the form of software function modules or functional units. Wherein, the division of modules or 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 the case of dividing each functional module corresponding to each function, FIG. 7 shows a schematic structural diagram of a communication device 70. The communication device 70 may be the first network device, or may be a chip applied to the first network device. The communication device 70 may be used to perform the functions of the communication device involved in the above-mentioned embodiments. The communication device 70 shown in FIG. 7 may include: a communication unit 702 and a processing unit 701 , and may also include a storage unit 703 . The schematic structural diagram shown in FIG. 7 may be used to illustrate the structure of the first network device involved in the foregoing embodiments.

When the structural diagram shown in FIG. 7 is used to illustrate the structure of the first network device involved in the above-mentioned embodiments, the processing unit 701 is configured to control and manage the actions of the first network device, for example, the communication unit 702 is configured to receiving a first data packet from a second network device including first data and a first identifier indicating that a link connected to the second network device in the second network is faulty/interrupted, the first network device being the first network device The second network device is a device on the first transmission path of the first data packet, the second network device is a device in the second network, and the first network and the second network are different networks.

The communication unit 702 is further configured to send the first data to devices in the second network through the second transmission path, and the devices on the second transmission path do not include the second network device.

In a possible design, the communication unit 702 is further configured to send first indication information to the source network device corresponding to the first data packet, where the first indication information is used to indicate to update the transmission path of the first data, or, the first indication The information is used to indicate that a link connected to the second network device in the second network is faulty/interrupted.

In a possible design, the communication unit 702 is also configured to send a second data packet to the second network device, the second data packet includes the first data and the first address information, and the first address information is the device receiving the first data address information.

Wherein, for a specific implementation manner of the communication device 70, reference may be made to the behavior function of the first network device in the data transmission method shown in FIG. 5 or FIG. 6 .

As yet another implementable manner, the processing unit 701 in FIG. 7 may be replaced by a processor, and the processor may integrate functions of the processing unit 701 . The communication unit 702 in FIG. 7 may be replaced by a transceiver or a transceiver unit, and the transceiver or transceiver unit may integrate the functions of the communication unit 702 .

Further, when the processing unit 701 is replaced by a processor, and the communication unit 702 is replaced by a transceiver or a transceiver unit, the communication device 70 involved in the embodiment of the present application may be the communication device shown in FIG. 4 .

In the case of dividing each functional module corresponding to each function, FIG. 8 shows a schematic structural diagram of a communication device 80. The communication device 80 may be a second network device or a chip applied to the second network device. The communication device 80 may be used to perform the function of communicating with the second network device involved in the above embodiments. The communication device 80 shown in FIG. 8 may include: a communication unit 802 and a processing unit 801 , and may further include a storage unit 803 . The schematic structural diagram shown in FIG. 7 may be used to illustrate the structure of the second network device involved in the foregoing embodiments.

When the schematic structural diagram shown in FIG. 8 is used to illustrate the structure of the first network device involved in the above embodiment, the processing unit 801 is configured to control and manage the actions of the second network device, for example, the communication unit 802 is configured to receiving a second data packet including first data and first address information from a first network device in the first network, the first network device communicates with the second network device, and the first address information is the device receiving the first data The address information of the first network and the second network are networks using different network protocols.

The communication unit 802 is further configured to, if the second network device detects that a link connected to the second network device in the second network is faulty/interrupted, send to the first network device including the first data and instructions for the second network The first data packet of the first identification in which the link connected to the second network is faulty/interrupted.

Wherein, for a specific implementation manner of the communication device 80, reference may be made to the behavior function of the second network device in the data transmission method shown in FIG. 6 .

As yet another implementable manner, the processing unit 801 in FIG. 8 may be replaced by a processor, and the processor may integrate functions of the processing unit 801 . The communication unit 802 in FIG. 8 may be replaced by a transceiver or a transceiver unit, and the transceiver or transceiver unit may integrate the functions of the communication unit 802 .

Further, when the processing unit 801 is replaced by a processor, and the communication unit 802 is replaced by a transceiver or a transceiver unit, the communication device 80 involved in this embodiment of the present application may be the communication device shown in FIG. 4 .

FIG. 9 is a structural diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 9, the system may include: a first network device 901, a second network device 902, and the like.

Wherein, the first network device 901 may be used to execute the steps of the first network device in FIG. 5 and FIG. 6 . The second network device 902 may perform the steps of the second network device in FIG. 6 . The first network device 901 has the functions of the first network device shown in FIG. 5 and FIG. 6 . The second network device 902 has the functions of the second network device shown in FIG. 6 .

Specifically, in this possible design, the specific implementation process of the first network device 901 can refer to the execution process of the first network device involved in the method embodiment shown in Figure 5 and Figure 6 above, and the specific implementation process of the second network device 902 Refer to the above-mentioned FIG. 6 method embodiment related to the execution process of the second network device.

Based on the system shown in FIG. 9, when the first network device receives the first identification from the second network device indicating that the link connected to the second network device in the second network is faulty/interrupted, the first network device The first data may be transmitted through the second transmission path. Since the devices on the second transmission path do not include the second network device, that is, the second transmission path can normally transmit the first data. In this way, when a multi-point failure occurs in the second network, the first network device can normally send the data required by the second network device to the devices in the second network, ensuring the data exchange between the first network and the second network. Normal transmission.

The embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer programs to instruct related hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments . The computer-readable storage medium may be an internal storage unit of the first network device or the second network device (including the data sending end and/or the data receiving end) of any of the foregoing embodiments, for example, the first network device or the second network device hard disk or memory. The above-mentioned computer-readable storage medium may also be an external storage device of the above-mentioned first network device or the second network device, such as a plug-in hard disk equipped on the above-mentioned first network device or the second network device, a smart media card (smart media card) , SMC), secure digital (securedigital, SD) card, flash memory card (flash card), etc. Further, the computer-readable storage medium may also include both an internal storage unit of the first network device or the second network device and an external storage device. The above-mentioned computer-readable storage medium is used to store the above-mentioned computer program and other programs and data required by the above-mentioned first network device or the second network device. The computer-readable storage medium described above can also be used to temporarily store data that has been output or will be output.

It should be noted that the terms "first" and "second" in the specification, claims and drawings of the present application are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, methods, products or apparatuses.

It should be understood that in this application, "at least one (item)" means one or more, "multiple" means two or more, and "at least two (items)" means two or three And three or more, "and/or", is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and/or B" can mean: only A exists, only B exists, and A exists at the same time and B, where A and B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c ", where a, b, c can be single or multiple.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be one physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places . Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, 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.

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application should be covered within the protection scope of the application . Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (14)

1. A data transmission method, comprising:

a first network device receives a first data packet from a second network device, wherein the first data packet comprises first data and a first identifier, the first identifier is used for indicating that a plurality of links connected with the second network device in a second network are failed/interrupted, the first network device is a device in the first network, the second network device is a device in the second network, the first network and the second network are networks using different network protocols, and the second network device is a device on a first transmission path of the first data packet; the first network is an internet protocol radio access network IPRAN network, the second network is a packet enhanced optical transport network PeOTN network, and the first network equipment and the second network equipment are connected through a UNI interface;

The first network device acquires the first data from the first data packet, and forwards the first data to the network device connected with the second network in the first network through a PW forwarding mode, so that the network device sends the first data to the device in the second network through a second transmission path, and the device on the second transmission path does not include the second network device.

2. The data transmission method according to claim 1, characterized in that the method further comprises:

the first network device sends first indication information to the source network device corresponding to the first data packet, where the first indication information is used to indicate updating of a transmission path of the first data.

3. The data transmission method according to claim 1 or 2, characterized in that the method further comprises:

the first network device sends a second data packet to the second network device, wherein the second data packet comprises the first data and first address information, and the first address information is address information of a device receiving the first data.

4. The data transmission method according to claim 1 or 2, wherein the first network is a PeOTN network and the second network is an IPRAN network.

5. A method of data transmission, the method comprising:

the method comprises the steps that second network equipment receives a second data packet from first network equipment, wherein the second data packet comprises first data, the first network equipment is equipment in a first network, the second network equipment is equipment in a second network, the first network equipment is in communication connection with the second network equipment, and the first network and the second network are networks using different network protocols; the first network is an internet protocol radio access network IPRAN network, the second network is a packet enhanced optical transport network PeOTN network, and the first network equipment and the second network equipment are connected through a UNI interface;

if the second network device detects that a plurality of links connected with the second network device in the second network fail/break, the second network device sends a first data packet to the first network device, where the first data packet includes the first data and a first identifier, the first identifier is used to indicate that a plurality of links connected with the second network device in the second network fail/break, and the first network device is used to obtain the first data from the first data packet, and forward the first data to a network device connected with the second network in the first network by using a PW forwarding manner, so that the network device sends the first data to a device in the second network through a second transmission path, and a device on the second transmission path does not include the second network device.

6. The data transmission method according to claim 5, wherein the first network is a packet-enhanced optical transport network PeOTN network and the second network is an internet protocol radio access network IPRAN network.

7. A communication apparatus, characterized in that it is applied to a first network device, includes a communication unit,

the communication unit is configured to receive a first data packet from a second network device, where the first data packet includes first data and a first identifier, where the first identifier is used to indicate that multiple links connected to the second network device in a second network fail/break, the first network device is a device in the first network, the second network device is a device in the second network, and the first network and the second network are networks using different network protocols, and the second network device is a device on a first transmission path of the first data packet; the first network is an internet protocol radio access network IPRAN network, the second network is a packet enhanced optical transport network PeOTN network, and the first network equipment and the second network equipment are connected through a UNI interface;

The communication unit is further configured to obtain the first data from the first data packet, and forward the first network to a network device connected to the second network in the first network by using a PW forwarding manner, so that the network device sends the first data to a device in the second network through a second transmission path, where the device on the second transmission path does not include the second network device.

8. The communication device of claim 7, wherein the communication device is configured to,

the communication unit is further configured to send first indication information to a source network device corresponding to the first data packet, where the first indication information is used to indicate updating a transmission path of the first data.

9. The communication apparatus according to claim 7 or 8, wherein the communication unit is further configured to send a second data packet to the second network device, the second data packet including the first data and first address information, the first address information being address information of a device that receives the first data.

10. The communication apparatus according to claim 7 or 8, wherein the first network is a packet-enhanced optical transport network, peOTN, network and the second network is an internet protocol radio access network, IPRAN, network.

11. A communication apparatus, for use with a second network device, the communication apparatus comprising: a communication unit;

the communication unit is configured to receive a second data packet from a first network device, where the second data packet includes first data, the first network device is a device in a first network, the second network device is a device in a second network, the first network device is communicatively connected to the second network device, and the first network and the second network are networks that use different network protocols; the first network is an internet protocol radio access network IPRAN network, the second network is a packet enhanced optical transport network PeOTN network, and the first network equipment and the second network equipment are connected through a UNI interface;

the communication unit is configured to send a first data packet to the first network device if a failure/interruption of multiple links connected to the second network device in the second network is detected, where the first data packet includes the first data and a first identifier, the first identifier is used to indicate that a failure/interruption of multiple links connected to the second network device in the second network occurs, and the first network device is configured to obtain the first data from the first data packet and forward the first data to a network device connected to the second network in the first network by using a PW forwarding manner, so that the network device sends the first data to a device in the second network through a second transmission path, and a device on the second transmission path does not include the second network device.

12. The communication apparatus of claim 11, wherein the first network is a packet-enhanced optical transport network, peOTN, network and the second network is an internet protocol radio access network, IPRAN, network.

13. A computer readable storage medium having instructions stored therein which, when executed, implement the method of any one of claims 1 to 4, or claim 5 or 6.

14. A chip comprising at least one processor and a communication interface coupled to the at least one processor, the at least one processor for running a computer program or instructions to implement the method of any one of claims 1 to 4 or claim 5 or claim 6.

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