CN117915227B - Data transmission method, device and storage medium - Google Patents

Abstract

The disclosure relates to the field of communication technologies, and in particular, to a data transmission method, a data transmission device and a storage medium, which are used for improving the problem of low uplink data transmission efficiency caused by easily increasing burst overhead. The data transmission method comprises the following steps: the main gateway sends burst frames to the optical line terminal according to the transmission bandwidth; the transmission bandwidth includes a plurality of contiguous bandwidth portions configured for a plurality of gateways; the synchronous data block of the burst frame occupies a first part of a first bandwidth part of the plurality of bandwidth parts; the payload portion of the burst frame occupies a second portion of the first bandwidth portion and other bandwidth portions of the plurality of bandwidth portions other than the first bandwidth portion.

Description

Data transmission method, device and storage medium

Technical Field

The present disclosure relates to the field of communication technology, and in particular to a data transmission method, device and storage medium.

Background technique

At present, the networking mode of combining fiber to the remote (FTTR) and fiber to the home (FTTH) is applied. In this networking mode, the optical line terminal (OLT) in FTTH can allocate upstream bandwidth to the master gateway and slave gateway in FTTR, and configure burst overhead for data synchronization in the upstream bandwidth, so that the master gateway and slave gateway can transmit upstream data in burst mode.

However, the size of the uplink bandwidth is fixed. When the number of master gateways and slave gateways continues to increase, the proportion of burst overhead in the uplink bandwidth will become larger and larger, which may easily lead to the problem of low uplink data transmission efficiency.

Summary of the invention

The embodiments of the present application provide a data transmission method, device and storage medium, which are used to improve the problem of low uplink data transmission efficiency caused by the increase of burst overhead.

On the one hand, a data transmission method is provided, which is applied to a main gateway, comprising:

A burst frame is sent to an optical line terminal according to a transmission bandwidth; the transmission bandwidth includes a plurality of continuous bandwidth parts configured for a plurality of gateways; a synchronization data block of the burst frame occupies a first part of a first bandwidth part among the plurality of bandwidth parts; a payload part of the burst frame occupies a second part of the first bandwidth part, and other bandwidth parts among the plurality of bandwidth parts except the first bandwidth part.

On the other hand, a data transmission method is provided, which is applied to an optical line terminal, comprising:

The burst frame sent by the main gateway is received according to the transmission bandwidth; the transmission bandwidth includes multiple continuous bandwidth parts configured for multiple gateways; the synchronization data block of the burst frame occupies the first part of the first bandwidth part among the multiple bandwidth parts; the payload part of the burst frame occupies the second part of the first bandwidth part, and other bandwidth parts among the multiple bandwidth parts except the first bandwidth part.

In another aspect, there is provided a data transmission device, applied to a main gateway, comprising: a sending module;

A sending module is used to send a burst frame to an optical line terminal according to a transmission bandwidth; the transmission bandwidth includes a plurality of continuous bandwidth parts configured for a plurality of gateways; a synchronization data block of the burst frame occupies a first part of a first bandwidth part among the plurality of bandwidth parts; a payload part of the burst frame occupies a second part of the first bandwidth part, and other bandwidth parts among the plurality of bandwidth parts except the first bandwidth part.

In yet another aspect, there is provided a data transmission device, applied to an optical line terminal, comprising: a receiving module;

A receiving module is used to receive a burst frame sent by a main gateway according to a transmission bandwidth; the transmission bandwidth includes a plurality of continuous bandwidth parts configured for a plurality of gateways; a synchronization data block of the burst frame occupies a first part of a first bandwidth part among the plurality of bandwidth parts; a payload part of the burst frame occupies a second part of the first bandwidth part, and other bandwidth parts among the plurality of bandwidth parts except the first bandwidth part.

On the other hand, a data transmission device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store instructions executable by the processor; and the processor implements the data transmission method described in any of the above embodiments when executing the instructions.

On the other hand, a computer-readable storage medium is provided, on which computer instructions are stored. When the computer instructions are executed on a computer, the computer implements the data transmission method described in any of the above embodiments.

On the other hand, a computer program product is provided. The computer program product includes computer program instructions. When the computer program instructions are executed by a processor, the data transmission method described in any one of the above embodiments is implemented.

In an embodiment of the present application, the master gateway can send a burst frame to the optical line terminal through a plurality of continuous bandwidth parts configured for a plurality of gateways within the transmission bandwidth. The burst frame includes a synchronization data block, i.e., a burst overhead for data synchronization, which occupies the first part of the first bandwidth part of the plurality of bandwidth parts. Moreover, the payload part of the burst frame continuously occupies the second part of the first bandwidth part and other bandwidth parts of the plurality of bandwidth parts, and is used to transmit the payload data of the plurality of gateways.

Based on this, when the uplink bandwidth configured for multiple gateways in the network to which the main gateway belongs is continuous, the main gateway can transmit the uplink data of the multiple gateways to the optical line terminal through one burst frame, thereby realizing the uplink burst transmission of multiple gateways under one burst overhead. Compared with the method of retaining the burst overhead in the bandwidth portion configured for each gateway by the optical line terminal, resulting in multiple burst overheads, the present application can support the main gateway to transmit the uplink data of multiple gateways under the condition of generating one burst overhead.

Therefore, in the face of the increasing number of master gateways and slave gateways under the OLT, the present application can support the OLT to allocate continuous uplink bandwidth to the gateways in the FTTR network where the master gateway is located, and only configure one burst overhead, without adding other burst overheads for all gateways, avoiding the problem of the increasing proportion of burst overhead in the uplink bandwidth, and improving the utilization of the uplink bandwidth and the transmission efficiency of uplink data. Therefore, the present application can be used to improve the problem of low uplink data transmission efficiency caused by the easy increase of burst overhead.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solution in the present application, the drawings required for use in some embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only drawings of some embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

FIG1 is a schematic diagram of the structure of a networking system provided in some embodiments of the present application;

FIG2 is a schematic diagram of a structure of a burst frame provided in some embodiments of the present application;

FIG3 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG4 is a schematic diagram of the structure of another networking system provided in some embodiments of the present application;

FIG5 is a flow chart of a data transmission method provided by some embodiments of the present application;

FIG6 is a flow chart of another data transmission method provided in some embodiments of the present application;

FIG7 is a schematic diagram of a structure of a message provided in some embodiments of the present application;

FIG8 is a schematic diagram of the structure of another message provided in some embodiments of the present application;

FIG9 is a schematic flow chart of another data transmission method provided in some embodiments of the present application;

FIG10 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG11 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG12 is a schematic flow chart of another data transmission method provided in some embodiments of the present application;

FIG13 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG14 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG15 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG16 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG17 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG18 is a schematic diagram of the structure of another burst frame provided in some embodiments of the present application;

FIG19 is a schematic diagram of the structure of a data transmission device provided in some embodiments of the present application;

FIG20 is a schematic diagram of the structure of another data transmission device provided in some embodiments of the present application;

FIG. 21 is a schematic diagram of the structure of another data transmission device provided in some embodiments of the present application.

Detailed ways

The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

In the description of this application, unless otherwise specified, "/" means "or", for example, A/B can mean A or B. "And/or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "multiple" means two or more.

At present, the whole-house fiber optic networking mode of FTTR has gradually entered the stage of large-scale deployment. FTTR networking is similar to FTTH networking, adopting a point-to-multipoint network topology. Among them, FTTH networking includes OLT and multiple optical network units (ONUs). OLT and ONU are connected through an optical distribution network (ODN). FTTR networking includes a master gateway and multiple slave gateways. The master gateway and the slave gateway are connected through an indoor fiber distribution network (IFDN). The master gateway can also be called a main fiber unit (MFU). The slave gateway can also be called a sub fiber unit (SFU).

As shown in Figure 1, it is a schematic diagram of the structure of a networking system provided by an embodiment of the present application. In the case of a combined deployment of FTTH and FTTR, the OLT can be connected to multiple master gateways, and each master gateway can be connected to multiple slave gateways. Between the OLT and different slave gateways, the master gateway can provide an equal-latency forwarding channel through transparent forwarding or standard conversion forwarding, so that the slave gateway is also equivalent to the ONU under the OLT. In this case, the OLT can directly allocate bandwidth to the master gateway and the slave gateway to simplify the bandwidth allocation mode and reduce the bandwidth allocation delay.

When transmitting uplink data to the OLT, the slave gateway may send a burst frame carrying the uplink data to the master gateway in burst mode, and the master gateway may also send a burst frame carrying the uplink data of the slave gateway to the OLT in burst mode.

In burst mode, there is usually burst overhead. Burst overhead refers to the bandwidth resource overhead used for data synchronization within the bandwidth occupied by the burst frame, which generally includes protection time, burst preamble, and burst delimiter. The bandwidth of the protection time, burst preamble, and burst delimiter can generally be reserved by the OLT or the main gateway.

The protection time is used to avoid conflicts between adjacent burst frames. During the protection time, the ONU optical module of the device is generally in the process of closing, opening, or completely closed. The length of the protection time is generally greater than or equal to the sum of the time it takes for the ONU optical module to complete the opening process and the closing process.

The burst preamble is generally a specific bit pattern, which is used by the master gateway or OLT to recover the receiving clock from the upstream burst frame. The burst delimiter is generally a bit pattern of a specified length, which is used by the master gateway or OLT to identify the starting position of the payload in the burst frame. The length and pattern of the burst preamble and burst delimiter can generally be specified by the OLT or master gateway.

For example, as shown in Fig. 2, a schematic diagram of the structure of a burst frame provided in an embodiment of the present application is shown. In the G.9804.2 higher speed passive optical network (HSP) general transmission convergence layer standard of the International Telecommunication Union Telecommunication Standardization Sector (ITU-T), the size of an uplink physical layer (PHY) frame can be 125 microseconds (μs).

ONU1 and ONU2 can send PHY bursts (i.e., PHY bursts or burst frames) to OLT through bandwidths at different locations. There is a time interval between PHY bursts, i.e., protection time. The upstream physical synchronization block (PSBu) at the head of the PHY burst can be used to carry overheads such as burst preamble and burst delimiter. The part of the PHY burst after the PSBu can be used to carry the payload. Optionally, the bandwidth occupied by the burst overhead can be the same between different PHY bursts, and the bandwidth occupied by the payload can be different.

As shown in Figure 3, a schematic diagram of the structure of another burst frame provided by an embodiment of the present application. The PSBu of the PHY burst header may include four parts. The first part may be a mandatory part, used to carry a specified burst preamble and burst delimiter. The burst preamble may be composed of multiple continuous sub-parts as shown in the burst preamble pattern in Figure 3. The second part, the third part and the fourth part are optional parts.

In one possible manner, the length and pattern of the burst preamble and burst delimiter may be specified by an indication message, for example, the burst profile physical layer operations administration and maintenance (PLOAM) message in the ITU-T G.9804.2 standard.

Optionally, burst frames in standards such as 10-Gigabit Passive Optical Networks (XG-PON) and 10-Gigabit symmetric passive optical network (XGS-PON), or burst frames in the G.fin series of standards and other standards applicable to FTTR scenarios are similar to the structure of the burst frames described in the above-mentioned ITU-T G.9804.2 standard, and are not described one by one here. The data transmission method proposed in this application can be applicable to these multiple standards.

In burst mode, the bandwidth allocated by the OLT to the master gateway and the slave gateway takes burst overhead into consideration. That is, each master gateway generates burst overhead when sending a burst frame to the OLT. Each slave gateway also generates burst overhead when sending a burst frame to the master gateway. In addition, when the master gateway forwards the uplink data of the slave gateway to the OLT, the burst overhead of the slave gateway still exists in the bandwidth. In this case, as the number of master and slave gateways increases, the uplink bandwidth utilization rate usually decreases significantly, resulting in low uplink data transmission efficiency.

For example, the GPON standard has an upstream transmission rate of 1.25 gigabits per second (Gbps), and the length of the burst overhead is 96 bits. Assume that 32 master gateways are connected to the OLT, and each master gateway is connected to 3 slave gateways. If all master gateways and slave gateways send upstream burst frames every 125μs, 19440 bytes of data can be transmitted upstream. In this case, the proportion of burst overhead in upstream transmission is about 31.6%.

In order to improve the problem of low uplink data transmission efficiency caused by the increase of burst overhead in the relevant bandwidth configuration mode, the embodiment of the present application proposes a data transmission method, in which the main gateway can send a burst frame to the optical line terminal through multiple continuous bandwidth parts configured for multiple gateways within the transmission bandwidth. The burst frame includes a synchronization data block, that is, a burst overhead for data synchronization, which occupies the first part of the first bandwidth part of the multiple bandwidth parts. In addition, the payload part of the burst frame continuously occupies the second part of the first bandwidth part and other bandwidth parts of the multiple bandwidth parts, and is used to transmit the payload data of the multiple gateways.

Based on this, when the uplink bandwidth configured for multiple gateways in the network to which the main gateway belongs is continuous, the main gateway can transmit the uplink data of the multiple gateways to the optical line terminal through a burst frame, thereby realizing uplink burst transmission of multiple gateways under one burst overhead. Compared with the method of retaining burst overhead in the bandwidth portion configured for each gateway by the optical line terminal, resulting in multiple burst overheads, the present application can support the main gateway to transmit the uplink data of multiple gateways under the condition of generating one burst overhead, thereby improving the uplink transmission efficiency and bandwidth utilization.

Therefore, in the face of the increasing number of master gateways and slave gateways under the OLT, the present application can support the OLT to allocate continuous uplink bandwidth to the gateways in the FTTR network where the master gateway is located, and only configure one burst overhead, without adding other burst overheads for all gateways, avoiding the problem of the increasing proportion of burst overhead in the uplink bandwidth, and improving the utilization of the uplink bandwidth and the transmission efficiency of uplink data. Therefore, the present application can improve the bandwidth allocation mechanism to improve the problem of low uplink data transmission efficiency caused by the easy increase of burst overhead.

In some embodiments of the present application, the data transmission method can be applied to the main gateway and OLT in the networking system. The networking system provided by the embodiments of the present application is described below.

Fig. 4 is a schematic diagram of a networking system 100 provided in an embodiment of the present application. As shown in Fig. 4 , the networking system 100 may include an OLT 10, a plurality of master gateways 20, and a plurality of slave gateways 30.

Among them, OLT10 can be connected to multiple master gateways 20 through a wired network (such as an optical fiber network) or a wireless network. The master gateway 20 can be connected to multiple slave gateways 30 managed by it through a wired network or a wireless network. The master gateway 20 can form a whole-house optical fiber network with the multiple slave gateways 30 managed by it.

The OLT 10 in FIG4 may be a terminal device for connecting to an optical fiber trunk line. In the networking system 100 shown in FIG4 , the OLT 10 may allocate bandwidth to the master gateway 20 and the slave gateway 30, and control the start time and window size of the master gateway 20 and the slave gateway 30 for sending uplink data. In addition, the OLT 10 may also be used to connect to upper-layer network elements to support data interaction between the master gateway 20 and the slave gateway 30 and an external network.

The master gateway 20 and the slave gateway 30 in FIG. 4 may have a communication function for transmitting uplink data.

For example, the OLT 10 may allocate a plurality of continuous bandwidth parts, i.e., transmission bandwidth, in the upstream bandwidth to the master gateway 20 and each slave gateway 30 connected to the corresponding master gateway 20, and the master gateway 20 further forwards the bandwidth parts belonging to the slave gateways 30 connected to the master gateway 20 to the corresponding slave gateways 30, wherein the first part and other bandwidth parts of these bandwidth parts are not forwarded to the slave gateways 30. The slave gateways 30 may send upstream data to the master gateway 20 based on the corresponding bandwidth parts. The master gateway 20 may send the synchronization data block of the burst frame in the first part of the first bandwidth part among the plurality of bandwidth parts, and send the upstream data of the master gateway 20 in the second part of the bandwidth part of the master gateway 20 and the first part of the non-first bandwidth part, and send the upstream data received by each slave gateway 30 in the second part of the bandwidth part of each slave gateway 30, thereby forming a large upstream burst sent by the master gateway 20. The OLT 10 can receive a large uplink burst sent within the transmission bandwidth in a burst mode, and on this basis continuously receive and identify the data sent within the second part of the first bandwidth part and other bandwidth parts, and assemble the master gateway 20 data transmitted within the first part of the bandwidth of other bandwidth parts as needed. If the transmission bandwidth includes the bandwidth part allocated to the master gateway 20, the master gateway 20 data transmitted within the first part of the bandwidth of other bandwidth parts and the data transmitted within the second part of the bandwidth part of the master gateway 20 are assembled as needed to obtain the uplink data of the master gateway 20 and each slave gateway 30.

In one possible manner, the master gateway 20 and the slave gateway 30 may have a Wi-Fi function, which may be used to establish a wireless connection with the terminal, receive uplink data from the terminal, and forward the uplink data from the terminal to the OLT 10. The master gateway 20 may directly forward the uplink data from the terminal to the OLT 10, and the slave gateway 30 may forward the uplink data from the terminal to the OLT 10 through the master gateway 20.

In the following, the data transmission method provided by the embodiment of the present application is described in conjunction with the networking system shown in FIG4. As shown in FIG5, a flow chart of a data transmission method provided by the embodiment of the present application is shown. The method shown in FIG5 can be applied to the networking system shown in FIG4. As shown in FIG5, the data transmission method may include: S501.

S501. The main gateway sends a burst frame to the optical line terminal according to the transmission bandwidth.

Corresponding to the process in S501 in which the master gateway sends burst frames to the optical line terminal within the transmission bandwidth, the optical line terminal receives the burst frames from the master gateway within the transmission bandwidth.

The transmission bandwidth may include a plurality of continuous bandwidth parts configured for a plurality of gateways. For example, the plurality of gateways may include a first gateway, a second gateway, and a third gateway, etc. Then the plurality of bandwidth parts may be a bandwidth part configured by the OLT for the first gateway, a bandwidth part configured by the OLT for the second gateway, and a bandwidth part configured by the OLT for the third gateway, etc. That is, the transmission bandwidth may include a bandwidth part configured by the OLT for the first gateway, a bandwidth part configured by the OLT for the second gateway, and a bandwidth part configured by the OLT for the third gateway, etc.

The multiple gateways may be any combination of multiple gateways belonging to the FTTR network where the master gateway is located. That is, the multiple gateways may include a master gateway and at least one slave gateway in the FTTR network where the master gateway is located. Alternatively, the multiple gateways may also include multiple slave gateways in the FTTR network where the master gateway is located. For example, the FTTR network where the master gateway is located may include one master gateway and three slave gateways. The multiple gateways may be the one master gateway and the three slave gateways, or any two of the three slave gateways, or the three slave gateways.

The synchronization data block of the burst frame can be used for data synchronization between the OLT and the main gateway, that is, the burst overhead of the main gateway sending uplink data to the OLT in burst mode, which may include protection time, burst preamble and burst delimiter, etc. The synchronization data block can occupy the first part of the first bandwidth part among multiple bandwidth parts. The first part is the part of the bandwidth part occupied by the burst overhead of the gateway corresponding to the bandwidth part in burst mode. For example, the bandwidth part corresponding to the first gateway in Figure 5 can be the first bandwidth part. The first part of the first bandwidth part is also the burst overhead of the bandwidth part of the first gateway.

The payload portion of the burst frame may occupy the second portion of the first bandwidth portion, and other bandwidth portions of the plurality of bandwidth portions. The second portion may be a portion of the bandwidth portion that is located after the first portion and is adjacent to the first portion. For example, in conjunction with FIG5 , the payload portion may occupy a portion of the bandwidth portion of the first gateway in FIG5 that is used to carry payload data, as well as a bandwidth portion of the second gateway and a bandwidth portion of the third gateway.

Combined with Figure 5, compared with the method in the related art in which the burst overhead of each bandwidth part is reserved when the main gateway sends uplink data to the OLT, the burst overhead of the bandwidth part of the first gateway is reserved in the present application, and the burst overhead of the bandwidth part of the second gateway and the burst overhead of the bandwidth part of the third gateway are no longer reserved. That is, the burst overhead of the first bandwidth part is reserved, and the burst overhead of other bandwidth parts is no longer reserved, and the burst overhead of other bandwidth parts is used to carry payload data to improve the uplink data transmission efficiency.

In a possible implementation, the payload part of the burst frame may include the first payload data of the main gateway and the second payload data of each gateway among the multiple gateways. The first payload data may occupy the first part of other bandwidth parts. That is, the payload data of the main gateway may occupy the burst overhead of other bandwidth parts for uplink transmission. The second payload data of each gateway may occupy the second part of the bandwidth part corresponding to the gateway in the transmission bandwidth. That is, the payload data of the gateway may be transmitted uplink through the second part of the corresponding bandwidth part.

For example, when the multiple bandwidth parts configured by the multiple slave gateways in the FTTR network where the master gateway is located are continuous, in addition to occupying the burst overhead of the first bandwidth part of the continuous multiple bandwidth parts to transmit synchronization data, the master gateway can occupy the burst overhead of other bandwidth parts of the multiple bandwidth parts to transmit its own payload data.

In conjunction with FIG5, when the master gateway is not any of the gateways in FIG5, the master gateway may occupy the burst overhead of the bandwidth portion of the second gateway and the third gateway to transmit the payload data, that is, the first payload data located in the uplink bandwidth corresponding to the two burst overheads. At the same time, the master gateway may transmit the second payload data of the first gateway, the second gateway, and the third gateway through the second portion of their respective bandwidth portions.

For another example, when the bandwidth portion of the master gateway is continuous with the bandwidth portion configured for the slave gateway in the FTTR network in which it is located, in addition to occupying the burst overhead of the first bandwidth portion of the two or more continuous bandwidth portions to transmit synchronization data, it can occupy the burst overhead of other bandwidth portions to transmit its own payload data.

In conjunction with FIG5, when the master gateway is the first gateway in FIG5, the master gateway can transmit part of the payload data through the second part of its bandwidth part, that is, the second payload data corresponding to the master gateway. In addition, the master gateway can also occupy the burst overhead of the bandwidth part of the slave gateway (that is, the second gateway and the third gateway) to transmit part of the payload data, that is, the first payload data located in the uplink bandwidth corresponding to the two burst overheads. At the same time, the master gateway can forward the payload data of the second gateway to the OLT through the second part of the bandwidth part of the second gateway, that is, the second payload data corresponding to the second gateway. The master gateway can forward the payload data of the third gateway to the OLT through the second part of the bandwidth part of the third gateway, that is, the second payload data corresponding to the third gateway.

In the case where the master gateway is the second gateway in FIG. 5 , the master gateway can transmit the payload data through the second part of its bandwidth part, i.e., the second payload data corresponding to the master gateway. In addition, the master gateway can also occupy the burst overhead of its bandwidth part to transmit the payload data, and occupy the burst overhead of the bandwidth part of the slave gateway (i.e., the third gateway) to transmit the payload data, i.e., the first payload data located in the uplink bandwidth corresponding to the two burst overheads. At the same time, the master gateway can forward the payload data of the first gateway to the OLT through the second part of the bandwidth part of the first gateway, i.e., the second payload data corresponding to the first gateway. The master gateway can forward the payload data of the third gateway to the OLT through the second part of the bandwidth part of the third gateway, i.e., the second payload data corresponding to the third gateway.

Based on the description of S501 above, it can be known that the main gateway can send a burst frame to the optical line terminal through multiple continuous bandwidth parts configured for multiple gateways within the transmission bandwidth. The burst frame includes a synchronization data block, that is, a burst overhead for data synchronization, which occupies the first part of the first bandwidth part in the multiple bandwidth parts. In addition, the payload part of the burst frame continuously occupies the second part of the first bandwidth part and other bandwidth parts in the multiple bandwidth parts, and is used to transmit the payload data of the multiple gateways.

Based on this, when the uplink bandwidth configured for multiple gateways in the network to which the main gateway belongs is continuous, the main gateway can transmit the uplink data of the multiple gateways to the optical line terminal through a burst frame, thereby realizing the uplink transmission of multiple gateways under one burst overhead. Compared with the method of retaining the burst overhead in the bandwidth portion configured for each gateway by the optical line terminal, resulting in multiple burst overheads, the present application can support the main gateway to transmit the uplink data of multiple gateways under the condition of generating one burst overhead.

Therefore, in the face of the increasing number of master gateways and slave gateways under the OLT, the present application can support the OLT to allocate continuous uplink bandwidth to the gateways in the FTTR network where the master gateway is located, and only configure one burst overhead, without configuring other burst overheads for all gateways, avoiding the problem of the increasing proportion of burst overhead in the uplink bandwidth, and improving the utilization of the uplink bandwidth and the transmission efficiency of uplink data. Therefore, the present application can improve the bandwidth allocation mechanism to improve the problem of low uplink data transmission efficiency caused by the easy increase of burst overhead.

In one embodiment, as shown in FIG6 , a flow chart of another data transmission method provided by an embodiment of the present application is provided. The data transmission method can be used to support the master gateway to determine that multiple bandwidth parts configured in the network are continuous, thereby realizing uplink data transmission by occupying burst overhead. The data transmission method includes: S601.

S601. The OLT sends a first message to a primary gateway.

Among them, the first message can be used to indicate multiple continuous bandwidth parts configured for multiple gateways in the network where the main gateway is located, and instruct the main gateway to use the first part of other bandwidth parts for data transmission, that is, allowing the main gateway to use the first part of the non-first bandwidth part in the transmission bandwidth for data transmission.

Corresponding to the process of S601, the main gateway receives the first message sent by the OLT, and can obtain multiple continuous bandwidth parts indicated by the first message, and use the first part of the transmission bandwidth that is not the first bandwidth part for data transmission according to the instruction of the optical line terminal.

In one possible manner, the first message may be a bandwidth map (BWmap) message. FIG. 7 shows a schematic diagram of the structure of a message, namely, the structure of a BWmap message taking ITU-T G.9804.2 as an example. As shown in FIG. 7 , the BWmap message may occupy N times 8 bytes. Among them, allocation structure 1, allocation structure 2, ..., allocation structure N are respectively allocated to gateway 1, gateway 2, ..., gateway N, and may occupy 8 bytes respectively. Bandwidth allocation identifier (allocation identifier, Alloc-ID) is a bandwidth allocation entity belonging to each gateway and may occupy 14 bits. Flags may be used to indicate dynamic bandwidth report upstream (DBRu) and PLOAM upstream (PLOAMu). Flags may occupy 2 bits, and DBRu and PLOAMu may occupy 1 bit respectively. Start time (StartTime) indicates the beginning of the bandwidth and may occupy 16 bits. Grant size (GrantSize) indicates the length of the bandwidth and may occupy 16 bits. Forced wake-up indication (FWI) can occupy 1 bit. Burst Profile can occupy 2 bits. DBRu, PLOAMu, FWI, and Burst Profile are option flags for bandwidth allocation. Header error check (HEC) is an error check field and can occupy 13 bits.

In one possible implementation, in order to improve the problem of low utilization of upstream bandwidth, the OLT may aggregate the upstream bandwidths of different gateways in the same FTTR network. For example, when allocating bandwidth to multiple gateways in the same FTTR network, the OLT may determine multiple continuous bandwidth parts from the upstream bandwidth, allocate the multiple bandwidth parts to the multiple gateways one by one, and determine to allow the main gateway to use the first part of the multiple bandwidth parts that is not the first bandwidth part for upstream data transmission. Furthermore, the OLT may send a first message to the main gateway to indicate that the multiple bandwidth parts are configured correspondingly to the multiple gateways, and allow the main gateway to use the first part of the multiple bandwidth parts that is not the first bandwidth part for upstream data transmission.

After receiving the first message from the OLT, the main gateway can parse the first message, determine that multiple bandwidth parts are allocated one-to-one to the multiple gateways, and determine that the first part of the multiple bandwidth parts other than the first bandwidth part is allowed to be used for uplink data transmission according to the configuration of the OLT.

Furthermore, the master gateway can determine that the multiple bandwidth parts are continuous based on the start and end positions of each bandwidth part, as well as the start time and window size of the burst overhead of each bandwidth part. Based on this, when the master gateway transmits uplink data in burst mode, it can occupy the burst overhead of other bandwidth parts except the first bandwidth part to transmit payload data.

In a possible implementation, when the master gateway forwards the indication information about bandwidth allocation to the slave gateway, it can send the bandwidth portion allocated to the slave gateway to the slave gateway, but does not send the allocation information about the uplink bandwidth corresponding to these burst overheads to the slave gateway. That is, when the OLT allocates bandwidth to each slave gateway, it still reserves the uplink bandwidth resources corresponding to the burst overheads such as the protection time, burst preamble and transmission delimiter in the current manner, and the slave gateway still sends burst transmission to the master gateway in the current manner.

For example, after the master gateway determines that the multiple bandwidth parts are allocated one-to-one with the multiple gateways, it can send indication information to the slave gateways among the multiple gateways to indicate the bandwidth parts allocated to the slave gateways. Therefore, the uplink bandwidth received by the slave gateway in the present application may include implicitly allocated burst overhead. Based on this, in the case of supporting uplink burst transmission from the slave gateway, the slave gateway in the present application may not perceive the uplink bandwidth corresponding to these burst overheads allocated by the OLT to the master gateway.

In one possible approach, when indicating that the primary gateway is allowed to use the first part of the non-first bandwidth part in the transmission bandwidth for data transmission, the first part of each non-first bandwidth part can be indicated by explicit configuration or by implicit configuration.

Furthermore, the OLT may also indicate through a predefined parameter that the master gateway is allowed to use the first part of the non-first bandwidth part in the transmission bandwidth for data transmission. The predefined parameter may have two values. The first value (for example, 0) may be used to indicate that the master gateway is not allowed to use the first part of the non-first bandwidth part in the multiple bandwidth parts for uplink data transmission. The second value (for example, 1) may be used to indicate that the master gateway is allowed to use the first part of the non-first bandwidth part in the multiple bandwidth parts for uplink data transmission. Based on this, the OLT may set the value of the predefined parameter to the second value in the first message or other interactive messages to indicate that the master gateway is allowed to use the first part of the non-first bandwidth part in the multiple bandwidth parts for uplink data transmission.

In a possible manner, when the first part of each non-first bandwidth part is indicated by explicit configuration, the predefined parameter can also be used to instruct the master gateway to implicitly configure the first part of each non-first bandwidth part to each slave gateway.

For example, when indicating the first part of each non-first bandwidth part by implicit configuration, the OLT can specify the size of the burst overhead, that is, the required bandwidth of the protection time, burst preamble and burst delimiter, and indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway. That is, the first message may include the first indication information and the second indication information. The first indication information can be used to indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway. The second indication information can be used to indicate the required bandwidth of the synchronization data block.

Based on this, when the master gateway obtains the continuous multiple bandwidth parts indicated by the first message, it can determine the start and end positions of each bandwidth part according to the first indication information and the second indication information. For example, the master gateway can move the start position of the second part of a bandwidth part forward by the size of the bandwidth required for the synchronization data block to obtain the start position of the bandwidth part. Furthermore, the master gateway can determine whether the start and end positions of each bandwidth part are continuous. If the start position of a bandwidth part is connected to the end position of an adjacent bandwidth part, and/or the end position of the bandwidth part is connected to the start position of an adjacent bandwidth part, the master gateway can determine that the start and end positions of each bandwidth part are continuous, and obtain the continuous multiple bandwidth parts indicated by the first message. Among them, the start position of a bandwidth part can be a position with a required bandwidth of a synchronization data block spaced from the start position of the second part of the bandwidth part, and the end position of the bandwidth part can be the end position of the second part of the bandwidth part. Furthermore, the master gateway identifies the first part of the multiple continuous bandwidth parts that is not the first bandwidth part.

For another example, when it is implemented by explicitly configuring the bandwidth, the OLT can allocate the first part of the non-first bandwidth part among the multiple bandwidth parts to the main gateway, and generate bandwidth allocation indication information for indicating the bandwidth allocation method. That is, the first message can also include third indication information. The third indication information can be used to indicate the start and end positions of the first part of other bandwidth parts corresponding to the main gateway, that is, the first part of the non-first bandwidth part is displayed and configured to the main gateway. Further, the OLT can send a first message carrying the third indication information to the main gateway. Accordingly, the main gateway can receive the first message carrying the third indication information sent by the OLT, and parse the first message to obtain the third indication information to directly identify the first part of the non-first bandwidth part among the multiple continuous bandwidth parts.

In addition, the master gateway may also directly determine whether the start and end positions of the second part of the bandwidth part corresponding to each gateway and the start and end positions of the first part of other bandwidth parts are continuous. If the start and end positions of the second part of the bandwidth part corresponding to each gateway and the start and end positions of the first part of other bandwidth parts are continuous, the master gateway may determine that the multiple bandwidth parts are continuous, that is, the multiple continuous bandwidth parts indicated by the first message are obtained.

In a possible manner, the master gateway may also send a second message to a slave gateway among the multiple gateways. The second message may include second indication information and fourth indication information. The second indication information may be used to indicate the required bandwidth of the synchronization data block. The fourth indication information may be used to indicate the start and end positions of the second part of the bandwidth part corresponding to the slave gateway. Based on this, after receiving the second message from the slave gateway, the bandwidth used for data transmission and the bandwidth used for sending burst overhead may be identified based on the fourth indication information.

In a possible example, as shown in Figure 8, a schematic diagram of the structure of a message provided in an embodiment of the present application is provided. The predefined parameter may be an R field in the embedded operations administration and maintenance (Embedded OAM) domain of a superframe under the ITU-T G.9804.2 standard, which is used to indicate whether the primary gateway is allowed to perform burst transmission through the first part of other bandwidth parts.

The R field of the operation control (OC) structure in the Embedded OAM domain is a reserved field with a value of 0. By defining the R field, when its value is 0, it can be used to indicate that the master gateway is not allowed to perform burst transmission through the first part of other bandwidth parts. When its value is 1, it can be used to indicate that the master gateway is allowed to perform burst transmission through the first part of other bandwidth parts, that is, the uplink bandwidth corresponding to the burst overhead of the bandwidth parts other than the first bandwidth part in the continuous multiple bandwidth parts.

The R field is located in the 51-bit OC body of the OC structure. The size of the PON identifier type (PIT) field in the OC body is 8 bits. The size of the PON identifier (PON-ID) field is 32 bits. The size of the R field is 1 bit. The size of the C field is also 1 bit. The size of the transmit optical level (TOL) field is 9 bits. Among them, the PIT field can be divided into a 1-bit RE field, a 3-bit ODN class field, a 1-bit downstream (DS) forward error correction (FEC) field, a 1-bit protocol indication field P, and a 2-bit link type (Link Type) field. The PON-ID field can be divided into a 28-bit administrative label (Administrative Label) field and a 4-bit downstream wavelength channel (DWLCH ID) field.

In one possible manner, whether the master gateway is allowed to perform burst transmission through the first part of the other bandwidth part may also be indicated by a message in an existing PLOAM and an optical network unit management and control interface (ONU management and controlInterface, OMCI). The predefined parameters may be implemented by redefining the reserved fields in these messages to indicate to the master gateway that the master gateway is allowed to perform burst transmission through the first part of the other bandwidth part. Alternatively, a new message may be defined in PLOAM and OMCI as the first message to indicate to the master gateway that the master gateway is allowed to perform burst transmission through the first part of the other bandwidth part.

In a possible manner, the OLT may simultaneously indicate through a first message that multiple bandwidth portions are configured correspondingly to multiple gateways, and that the first portion of the transmission bandwidth that is not the first bandwidth portion is configured correspondingly to the primary gateway. Alternatively, the OLT may also indicate through a first message that multiple bandwidth portions are configured correspondingly to multiple gateways, and indicate through a message different from the first message that the primary gateway is allowed to use the first portion of the transmission bandwidth that is not the first bandwidth portion for data transmission.

Based on the description of S601 above, it can be known that the OLT can indicate the uplink bandwidth corresponding to the burst overhead that can be used by the main gateway. Furthermore, after receiving the indication information, the main gateway can judge the multiple bandwidth parts. Under the condition of considering the uplink bandwidth corresponding to the burst overhead, if multiple consecutive bandwidth parts are allocated to multiple gateways in the network to which they belong, it can be determined that in addition to retaining the burst overhead in the first bandwidth part, the subsequent burst overhead can be used to transmit the uplink data of the main gateway to support the main gateway to occupy the burst overhead of other bandwidth parts to transmit uplink data. Based on this. The main gateway can aggregate multiple burst frames of multiple gateways into a large burst frame to reduce the proportion of bandwidth resources used for burst overhead in the uplink bandwidth.

Therefore, the present application can reuse the uplink bandwidth corresponding to the burst overhead of the bandwidth parts other than the first bandwidth part in multiple bandwidth parts, that is, while the slave gateway uses it to transmit the burst protection time, burst preamble and burst delimiter to the master gateway, the master gateway can use it to transmit uplink data to the OLT, thereby increasing the uplink bandwidth that can be allocated by the OLT and reducing the increase in burst overhead caused by the increase in the number of slave gateways, effectively improving the uplink bandwidth utilization, and also improving the effectiveness of the combined deployment of FTTH and FTTR.

In one embodiment, when multiple gateways include a master gateway, in order to support the master gateway to send payload data at different positions in a burst frame, an embodiment of the present application provides an optional implementation method, including: step A.

Step A: When the main gateway is included in the plurality of gateways, the main gateway splits the payload data of the main gateway into the third payload data and other first payload data.

The third payload data may include the second payload data of the main gateway and the first payload data of the second part of the bandwidth portion corresponding to the main gateway. Other first payload data may be used to represent the first payload data of the second part of the bandwidth portion corresponding to the main gateway.

In one possible manner, when a bandwidth corresponding to a first payload data and a bandwidth corresponding to a second payload data of a main gateway are continuous, the bandwidth corresponding to the first payload data and the bandwidth corresponding to the second payload data of the main gateway can be spliced into a large bandwidth, and the main gateway can send the continuous first payload data and the second payload data of the main gateway within this large bandwidth.

In a possible implementation, if multiple gateways include a main gateway, it can be indicated that the multiple continuous bandwidth parts include the bandwidth part allocated to the main gateway by the OLT. In this case, in addition to transmitting the payload data through the second part of its bandwidth part, the main gateway can also transmit the payload data through the uplink bandwidth corresponding to the burst overhead of other bandwidth parts. That is, the main gateway can split the payload data into a third payload data, and other first payload data. For example, the main gateway can obtain the third payload data by splitting it according to the size of the second part of its bandwidth part and the first part continuous with the second part of its bandwidth part, and can split the other payload data into other first payload data according to the size of the uplink bandwidth corresponding to the burst overhead. Subsequently, the main gateway can send these data subframes in the order of the bandwidth of each part, so that the OLT can assemble them in the order of reception.

In one embodiment, when the multiple gateways do not include a master gateway, in order to support the master gateway to send payload data at different positions in a burst frame, an embodiment of the present application provides an optional implementation method, including: step B.

Step B: When the multiple gateways do not include the main gateway, the main gateway splits the payload data of the main gateway into first payload data corresponding to the first part of each non-first bandwidth part.

In a possible manner, the first part of each non-first bandwidth part is also at least one first part, that is, the main gateway can split the payload data of the main gateway into at least one first payload data corresponding to the at least one first part.

In a possible implementation, if the multiple gateways do not include the master gateway, it can be indicated that the multiple continuous bandwidth parts do not include the bandwidth part allocated to the master gateway by the OLT. In this case, the master gateway can transmit the payload data through the uplink bandwidth corresponding to the burst overhead of other bandwidth parts. Then the master gateway can split the payload data into at least one first payload data. For example, the master gateway can split the data frame corresponding to the payload data into at least one data subframe according to the window size of the burst overhead of other bandwidth parts in the multiple bandwidth parts.

In one embodiment, as shown in Fig. 9, it is a flowchart of another data transmission method provided by the embodiment of the present application. In the case of transmitting uplink data, the data transmission method provided by the embodiment of the present application may include: S901-S904.

S901. The slave gateway sends a burst subframe on a bandwidth portion corresponding to the slave gateway.

Corresponding to the process of S901, the master gateway receives the burst subframe sent by the slave gateway on the bandwidth portion corresponding to the slave gateway.

The burst subframe may include a synchronization data block of the burst subframe and second payload data from the gateway.

In a possible implementation, the bandwidth portion corresponding to the slave gateway may be any one of a plurality of continuous bandwidth portions, that is, the bandwidth portion allocated by the OLT to the slave gateway is any one of a plurality of bandwidth portions. The slave gateway may send a burst subframe to the master gateway through the corresponding bandwidth portion to efficiently transmit uplink data in burst mode.

S902: When the bandwidth portion corresponding to the slave gateway is the first bandwidth portion in the transmission bandwidth, the master gateway sends a synchronization data block of a burst frame on the first portion of the bandwidth portion corresponding to the slave gateway.

Corresponding to the process of S902, the OLT receives the synchronization data block of the burst frame sent by the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In a possible implementation, if the bandwidth portion corresponding to the slave gateway is the first bandwidth portion in the transmission bandwidth, the master gateway may send a synchronization data block of a burst frame on the first portion of the bandwidth portion corresponding to the slave gateway to support the OLT in recovering the receiving clock corresponding to the master gateway and identifying the starting position of the payload on the transmission bandwidth. Based on this, the OLT may start to continuously receive subsequent payloads on the transmission bandwidth, thereby realizing the transmission of uplink data in the network where the master gateway is located.

S903: When the bandwidth portion corresponding to the slave gateway is not the first bandwidth portion in the transmission bandwidth, the master gateway sends the first payload data of the master gateway on the first portion of the bandwidth portion corresponding to the slave gateway.

Corresponding to the process of S903 , the OLT receives the first payload data of the master gateway sent by the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In a possible implementation, if the bandwidth portion corresponding to the slave gateway is not the first bandwidth portion in the transmission bandwidth, it can indicate that the master gateway has transmitted synchronization data through the first portion of the first bandwidth portion in the transmission bandwidth, that is, the OLT can already identify the starting position of the payload in the transmission bandwidth and is continuously receiving uplink data without the need to perform data synchronization again. In this case, the master gateway can send the first payload data of the master gateway on the first portion of the bandwidth portion corresponding to the slave gateway, so that the OLT continuously receives the first payload data of the master gateway sent by the master gateway on the first portion of the bandwidth portion corresponding to the slave gateway.

S904: The master gateway forwards the second payload data of the slave gateway on the second part of the bandwidth part corresponding to the slave gateway.

Corresponding to the process of S904, the OLT receives the second payload data of the slave gateway sent by the master gateway on the second part of the bandwidth part corresponding to the slave gateway.

In a possible implementation, the master gateway can recover the clock through the burst preamble of the burst subframe sent by the slave gateway, and search for the burst delimiter to obtain the second payload data of the slave gateway. Furthermore, the master gateway can forward the second payload data of the slave gateway to the OLT in the second part of the bandwidth part corresponding to the slave gateway. Accordingly, the OLT can continuously receive the second payload data of the slave gateway sent by the master gateway in the second part of the bandwidth part corresponding to the slave gateway.

In a possible example, as shown in Fig. 10, a schematic diagram of a burst frame structure provided in an embodiment of the present application is shown. Assume that the multiple gateways may include slave gateway 1, slave gateway 2 and slave gateway 3 connected to the master gateway.

The bandwidth portion corresponding to gateway 1 is the first bandwidth portion on the transmission bandwidth, and the bandwidth portion corresponding to gateway 2 and the bandwidth portion corresponding to gateway 3 are non-first bandwidth portions on the transmission bandwidth.

The OLT can allocate three continuous bandwidth parts to slave gateway 1, slave gateway 2 and slave gateway 3 to aggregate these upstream bandwidths. Each bandwidth part includes a burst overhead part and a payload bearing part. Among them, the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the OLT. The payload bearing part is explicitly allocated, for example, allocated through BWmap. The OLT can also notify the main gateway that the first part of the non-first bandwidth part in the transmission bandwidth can be used by setting the R bit of the OC body to 1. After the main gateway receives the first message from the OLT, it can parse the first message to obtain these bandwidth allocation information and store it locally. In addition, the main gateway can determine that the three bandwidth parts are continuous upstream bandwidths based on the fact that the starting and ending positions of the three bandwidth parts are connected end to end. That is, the end position of the bandwidth part of slave gateway 1 is connected to the starting position of the bandwidth part of slave gateway 2, and the end position of the bandwidth part of slave gateway 2 is connected to the starting position of the bandwidth part of slave gateway 3. Generally, the length of the protection time of the burst overhead is specified in the standard. The burst preamble and burst delimiter are configured by the OLT through the Burst_Profile message and the flag in the BWmap. Therefore, the master gateway obtains the length of the first part of its own bandwidth part and the length of the first part of the bandwidth part of the slave gateway in the network to which it belongs, and forms the size and start and end position of the corresponding bandwidth part with the corresponding payload bearing part. In addition, the master gateway can determine that the bandwidth part of slave gateways 2 and 3 is a continuous bandwidth part other than the first bandwidth part, and can occupy the burst overhead of slave gateways 2 and 3 to transmit uplink data. Of course, the OLT can also normally allocate the bandwidth part of slave gateway 1, that is, the corresponding part of the bandwidth of the burst overhead is implicitly allocated, that is, reserved by the OLT, and the payload bearing part is explicitly allocated. Through BWmap allocation, the corresponding bandwidth of the burst overhead part of slave gateways 2 and 3 is explicitly allocated to the master gateway, and the bandwidth of the payload bearing part of slave gateways 2 and 3 is explicitly allocated to slave gateways 2 and 3 respectively.

The master gateway can send indication information to slave gateway 1, slave gateway 2 and slave gateway 3 respectively to indicate the corresponding bandwidth parts allocated by OLT, wherein the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the master gateway, and the payload bearing part is explicitly allocated and allocated through BWmap. Slave gateway 1, slave gateway 2 and slave gateway 3 can parse the indication information to obtain their respective bandwidth parts, and send burst frames through their respective bandwidth parts. Each burst frame can include burst overhead and payload data. After the master gateway receives three burst frames from slave gateway 1, slave gateway 2 and slave gateway 3, it can recover the clock through the burst preambles of the three burst frames and search for burst delimiters to obtain the payload data of slave gateway 1, slave gateway 2 and slave gateway 3.

As shown in FIG10 , in the traditional uplink transmission mode, even if the bandwidth allocated by the OLT to the slave gateway 1, the slave gateway 2 and the slave gateway 3 is continuous, when the master gateway forwards the uplink data of the slave gateway 1, the slave gateway 2 and the slave gateway 3 to the OLT, it still needs to send the burst overhead in the uplink bandwidth of the slave gateway 1, the slave gateway 2 and the slave gateway 3 respectively.

As shown in Figure 11, it is a structural diagram of another burst frame provided by an embodiment of the present application. Under the transmission mode provided by the present application, the master gateway can transmit burst overhead, i.e., protection time, burst preamble, and burst delimiter, etc., before forwarding the uplink data of the slave gateway 1 to the OLT, and send the payload data of the slave gateway 1, and send the first payload data 1 of the master gateway itself within the uplink bandwidth corresponding to the burst overhead of the slave gateway 2, and send the payload data of the slave gateway 2, and continue to send the first payload data 2 of the master gateway itself within the uplink bandwidth corresponding to the burst overhead of the slave gateway 3, and send the payload data of the slave gateway 3.

Based on this, the master gateway forwards the payload data of slave gateway 1, slave gateway 2 and slave gateway 3 to the OLT through the second part of each of the three burst frames, and can also occupy the burst overhead in the burst frames of slave gateway 2 and slave gateway 3 to transmit the uplink data of the master gateway.

Compared to the traditional transmission method of three burst frames that generate three burst overheads arriving at the OLT, the transmission method provided in the embodiment of the present application can synthesize the three burst frames from gateway 1, gateway 2 and gateway 3 as three burst subframes into one large burst frame, so that one large burst frame that generates one burst overhead arrives at the OLT, and the one large burst frame includes the payload data transmitted by the master gateway in the two burst overheads of slave gateway 2 and slave gateway 3, that is, the uplink bandwidth corresponding to the latter two burst overheads is replaced by the payload data of the main gateway by carrying the burst overhead.

Based on the above example, it can be seen that the present application can reduce 3 burst overheads to 1 burst overhead, achieving a reduction of about 66% in the amount of uplink bandwidth resources occupied by the burst overhead. Moreover, the greater the number of multiple gateways, the more obvious the reduction in the amount of uplink bandwidth resources occupied by the burst overhead. Therefore, the present application can improve the uplink bandwidth utilization, thereby improving the uplink data transmission efficiency.

In one embodiment, as shown in Fig. 12, it is a flowchart of another data transmission method provided by the embodiment of the present application. In the case of transmitting uplink data, the data transmission method provided by the embodiment of the present application may include: S1001-S1002.

S1001. When the bandwidth part corresponding to the main gateway is the first bandwidth part in the transmission bandwidth, the main gateway sends the synchronization data block of the burst frame on the first part of the bandwidth part corresponding to the main gateway, and sends the second payload data of the main gateway on the second part of the bandwidth part corresponding to the main gateway.

Corresponding to the process of S1001, the OLT receives the synchronization data block of the burst frame sent by the master gateway on the first part of the bandwidth part corresponding to the master gateway, and receives the second payload data of the master gateway sent by the master gateway on the second part of the bandwidth part corresponding to the master gateway.

In a possible implementation, when multiple gateways include a master gateway, the bandwidth portion allocated by the OLT to the master gateway may be the first bandwidth portion among the multiple bandwidth portions. In this case, the master gateway may send the synchronization data block of the burst frame on the first portion of the bandwidth portion corresponding to the master gateway. Based on this, the OLT may receive the synchronization data block of the burst frame sent by the master gateway on the first portion of the bandwidth portion corresponding to the master gateway to restore the receiving clock corresponding to the master gateway and identify the starting position of the payload on the transmission bandwidth. Furthermore, the OLT may receive the second payload data of the master gateway sent by the master gateway on the second portion of the bandwidth portion corresponding to the master gateway, and begin to continuously receive other payloads on the transmission bandwidth, thereby realizing the transmission of uplink data within the network where the master gateway is located.

S1002: When the bandwidth portion corresponding to the main gateway is not the first bandwidth portion in the transmission bandwidth, the main gateway sends continuous first payload data and second payload data of the main gateway on the first part and the second part of the bandwidth portion corresponding to the main gateway.

Corresponding to the process of S1002, the OLT receives first payload data and second payload data of the master gateway continuously sent by the master gateway on the first part and the second part of the bandwidth part corresponding to the master gateway.

In a possible implementation, when multiple gateways include a master gateway, the bandwidth portion allocated by the OLT to the master gateway may be a non-first bandwidth portion among the multiple bandwidth portions. In this case, the master gateway has transmitted synchronization data through the first portion of the first bandwidth portion in the transmission bandwidth, that is, the OLT has been able to identify the starting position of the payload in the transmission bandwidth and is continuously receiving uplink data without the need to synchronize data again. The master gateway can then send continuous first payload data and second payload data of the master gateway on the first portion and the second portion of the bandwidth portion corresponding to the master gateway, so that the OLT can continuously receive the payload data of the master gateway on the bandwidth portion corresponding to the master gateway.

In one possible manner, when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are continuous, that is, when the first part of the bandwidth part corresponding to the slave gateway is immediately after the second part of the bandwidth part corresponding to the master gateway, the master gateway can also send the first payload data of the master gateway continuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway. In this case, after receiving the data on the bandwidth part corresponding to the master gateway, the OLT can also continuously receive the first payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In one possible manner, when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are discontinuous, the master gateway may send the first payload data of the master gateway discontinuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway. In this case, the OLT may receive the first payload data of the master gateway discontinuous with the second payload data of the master gateway in the first part of the bandwidth part corresponding to the slave gateway.

In a possible example, as shown in FIG13, a schematic diagram of the structure of another burst frame provided in an embodiment of the present application is provided. Assume that the master gateway is connected to slave gateway 1, slave gateway 2, and slave gateway 3. The multiple gateways include the master gateway, and slave gateway 2 and slave gateway 3 connected to the master gateway. The OLT currently does not allocate an uplink bandwidth to the slave gateway 1. Of course, the OLT can also allocate an uplink bandwidth of the non-first bandwidth part to the slave gateway 1, and its processing logic is the same as that of the slave gateways 2 and 3.

The bandwidth portion corresponding to the master gateway is the first bandwidth portion on the transmission bandwidth, and the bandwidth portion corresponding to the slave gateway 2 and the bandwidth portion corresponding to the slave gateway 3 are non-first bandwidth portions on the transmission bandwidth.

The OLT can allocate three continuous bandwidth parts to the master gateway, slave gateway 2 and slave gateway 3 to aggregate these upstream bandwidths. Each bandwidth part includes a burst overhead part and a payload bearing part, wherein the corresponding part of the bandwidth of the burst overhead is implicitly allocated, that is, reserved by the OLT, and the payload bearing part is explicitly allocated, allocated through BWmap, and the OLT also informs the master gateway that the first part of the non-first bandwidth part in the transmission bandwidth can be used by setting the R bit of the OC body to 1. After receiving the first message from the OLT, the master gateway can parse the first message to obtain these bandwidth allocation information and store them locally. In addition, the master gateway can connect the start and end positions of the three bandwidth parts head to tail and determine that the three bandwidth parts are continuous upstream bandwidths. Generally, the protection time length of the burst overhead is specified in the standard, and the burst preamble and burst delimiter are configured by the OLT through the Burst_Profile message and the flag in the BWmap. Therefore, the master gateway obtains the length of the first part of its own bandwidth part and the length of the first part of the bandwidth part of the slave gateway in the network to which it belongs, and forms the size and start and end positions of the corresponding bandwidth part with the corresponding payload bearing part. In addition, the master gateway can determine that the bandwidth portion of slave gateways 2 and 3 is a continuous bandwidth portion other than the first bandwidth portion, and can occupy the burst overhead of slave gateways 2 and 3 to transmit uplink data. Of course, the OLT can also allocate the bandwidth portion of the master gateway normally, that is, the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the OLT, and the payload bearing portion is explicitly allocated. Through BWmap allocation, the bandwidth corresponding to the burst overhead portion of slave gateways 2 and 3 is explicitly allocated to the master gateway, and the bandwidth of the payload bearing portion of slave gateways 2 and 3 is explicitly allocated to slave gateways 2 and 3 respectively.

The master gateway can send indication information to slave gateway 2 and slave gateway 3 respectively to indicate the bandwidth portion allocated by OLT respectively, wherein the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the master gateway, and the payload bearing portion is explicitly allocated and allocated through BWmap. Slave gateway 2 and slave gateway 3 can parse the indication information to obtain their respective bandwidth portions. Based on this, the master gateway, slave gateway 2 and slave gateway 3 can each transmit burst frames in the allocated bandwidth portion. Each burst frame can include burst overhead and payload data. After receiving the burst frames from slave gateway 2 and slave gateway 3, the master gateway can recover the clock through their respective burst preambles and search for burst delimiters to obtain the payload data of slave gateway 2 and slave gateway 3.

As shown in FIG13 , in the conventional uplink transmission mode, even if the bandwidth portions allocated by the OLT to the master gateway, slave gateway 2 and slave gateway 3 are continuous, when the master gateway performs burst transmission to the OLT in burst mode, in addition to occupying the burst overhead of its bandwidth portion to transmit synchronous data, when forwarding the uplink data of slave gateways 2 and 3 to the OLT, it is still necessary to send the burst overhead in the uplink bandwidth of slave gateways 2 and 3 respectively.

As shown in FIG. 14, it is a structural diagram of another burst frame provided by an embodiment of the present application. Under the transmission mode provided by the present application, the master gateway first sends a burst overhead, i.e., protection time, burst preamble, and burst delimiter, etc., to the OLT, and then occupies the second part of its bandwidth part to send its payload data. After receiving the burst frame from the slave gateway 2, the master gateway can recover the clock through its burst preamble and search for the burst delimiter, obtain the payload data of the slave gateway 2, and send the payload data of the master gateway itself through the upstream bandwidth corresponding to the burst overhead of the slave gateway 2, and form payload 1 with the payload data occupying the second part of the bandwidth part of the master gateway, and send the payload data of the slave gateway 2 through the second part of the bandwidth part of the slave gateway 2. After receiving the burst frame from the slave gateway 3, the master gateway can recover the clock through its burst preamble and search for the burst delimiter, obtain the payload data of the slave gateway 3, and send the payload data of the master gateway itself (i.e., payload 2) through the upstream bandwidth corresponding to the burst overhead of the slave gateway 3, and send the payload data of the slave gateway 3 through the second part of the bandwidth part of the slave gateway 3.

Based on this, the master gateway sends the payload data of the master gateway, slave gateway 2 and slave gateway 3 to the OLT through the second part of each of the three burst frames, and can also occupy the burst overhead in the burst frames of slave gateway 2 and slave gateway 3 to transmit the uplink data of the master gateway.

Compared with the traditional transmission method of three burst frames that generate three burst overheads when arriving at the OLT, the transmission method provided in the embodiment of the present application can synthesize the three burst frames of the master gateway, slave gateway 2 and slave gateway 3 as three burst subframes into one large burst frame, so that one large burst frame that generates one burst overhead arrives at the OLT, and the one large burst frame includes the payload data transmitted by the master gateway in the two burst overheads of slave gateway 2 and slave gateway 3, that is, the uplink bandwidth corresponding to the latter two burst overheads is replaced by the payload data of the main gateway by carrying the burst overhead.

In another possible example, as shown in FIG15, a schematic diagram of the structure of another burst frame provided in an embodiment of the present application is provided. Assume that the master gateway is connected to slave gateway 1, slave gateway 2, and slave gateway 3. The multiple gateways include the master gateway, and slave gateway 1 and slave gateway 3 connected to the master gateway. The OLT currently does not allocate an uplink bandwidth to the slave gateway 2. Of course, the OLT can also allocate an uplink bandwidth of the non-first bandwidth part to the slave gateway 2, and its processing logic is the same as that of the slave gateways 2 and 3.

Among them, the bandwidth portion corresponding to the slave gateway 1 is the first bandwidth portion on the transmission bandwidth, and the bandwidth portion corresponding to the master gateway and the bandwidth portion corresponding to the slave gateway 3 are non-first bandwidth portions on the transmission bandwidth.

OLT can allocate three continuous bandwidth parts to slave gateway 1, master gateway and slave gateway 3 to aggregate these upstream bandwidths. Each bandwidth part includes a burst overhead part and a payload bearing part, wherein the corresponding bandwidth of the burst overhead is implicitly allocated, that is, reserved by OLT, and the payload bearing part is explicitly allocated, allocated through BWmap, and OLT also informs the master gateway that the first part of the non-first bandwidth part in the transmission bandwidth can be used by setting the R bit of the OC body to 1. After receiving the first message from OLT, the master gateway can parse the first message to obtain these bandwidth allocation information and store them locally. In addition, the master gateway can connect the start and end positions of the three bandwidth parts head to tail and determine that the three bandwidth parts are continuous upstream bandwidths. Generally, the protection time length of the burst overhead is specified in the standard, and the burst preamble and burst delimiter are configured by OLT through the Burst_Profile message and the flag in BWmap. Therefore, the master gateway obtains the length of the first part of its own bandwidth part and the length of the first part of the bandwidth part of the slave gateway in the network to which it belongs, and forms the size and start and end positions of the corresponding bandwidth part with the corresponding payload bearing part. In addition, the master gateway can determine that the bandwidth part of the master gateway and slave gateway 3 is a continuous bandwidth part other than the first bandwidth part, and can occupy the burst overhead of the master gateway and slave gateway 3 to transmit uplink data. Alternatively, the bandwidth corresponding to the burst overhead of slave gateway 1 can be implicitly allocated, that is, reserved by the OLT, and the payload bearing part is explicitly allocated through BWmap. The bandwidth corresponding to the burst overhead part of the master gateway and slave gateway 3 is explicitly allocated to the master gateway, and the bandwidth of the payload bearing part of slave gateway 1, master gateway and slave gateway 3 is explicitly allocated to slave gateway 1, master gateway and slave gateway 3 respectively.

The master gateway can send indication information to slave gateway 1 and slave gateway 3 respectively to indicate the corresponding bandwidth parts allocated by OLT, wherein the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the master gateway, and the payload bearing part is explicitly allocated and allocated through BWmap. Slave gateway 1 and slave gateway 3 can parse the indication information to obtain their respective bandwidth parts. Based on this, the master gateway, slave gateway 1 and slave gateway 3 can each transmit burst frames in the allocated bandwidth part. Each burst frame can include burst overhead and payload data. After receiving the burst frames from slave gateway 1 and slave gateway 3, the master gateway can recover the clock through their respective burst preambles and search for burst delimiters to obtain the payload data of slave gateway 1 and slave gateway 3.

As shown in FIG15 , in the conventional uplink transmission mode, even if the bandwidth portions allocated by the OLT to the slave gateway 1, the master gateway and the slave gateway 3 are continuous, when the master gateway performs burst transmission to the OLT in the burst mode, in addition to occupying the burst overhead of its bandwidth portion to transmit synchronous data, when forwarding the uplink data of the slave gateway 1 and the slave gateway 3 to the OLT, it is still necessary to send the burst overhead in the uplink bandwidth of the slave gateway 1 and the slave gateway 3 respectively.

As shown in FIG. 16, it is a structural diagram of another burst frame provided by an embodiment of the present application. Under the transmission mode provided by the present application, after the master gateway receives the burst frame from the slave gateway 1, it can recover the clock through the burst preamble in its burst overhead (i.e., the first part) and search for the burst delimitation, obtain the payload data of the slave gateway 1, and forward the protection time, burst preamble and burst delimitation parts to the OLT, as well as forward the payload data of the slave gateway 1. Then, the master gateway can occupy its bandwidth part to send its payload data to the OLT. After the master gateway receives the burst frame from the slave gateway 3, it can recover the clock through its burst preamble and search for the burst delimitation, obtain the payload data of the slave gateway 3, and send the payload data of the master gateway itself through the uplink bandwidth corresponding to the burst overhead of the slave gateway 3, and send the payload data of the slave gateway 3 through the second part of the bandwidth part of the slave gateway 3. In this case, the master gateway can transmit the payload 3 through the burst overhead part of its bandwidth part, the payload bearing part, and the burst overhead part of the bandwidth part of the slave gateway 3.

Based on this, the master gateway sends the payload data of slave gateway 1, master gateway and slave gateway 3 to OLT through the second part of each of the three burst frames, and can also occupy the burst overhead in the burst frames of the master gateway and slave gateway 3 to transmit the uplink data of the master gateway.

Compared with the traditional transmission method of three burst frames that generate three burst overheads when arriving at the OLT, the transmission method provided in the embodiment of the present application can synthesize the three burst frames of the master gateway, slave gateway 2 and slave gateway 3 as three burst subframes into one large burst frame, so that one large burst frame that generates one burst overhead arrives at the OLT, and the one large burst frame includes the payload data transmitted by the master gateway in the two burst overheads of the master gateway and the slave gateway 3, that is, the uplink bandwidth corresponding to the latter two burst overheads is replaced by the payload data of the main gateway by carrying the burst overhead.

In another possible example, as shown in FIG17, a schematic diagram of the structure of another burst frame provided in an embodiment of the present application is provided. Assume that the master gateway is connected to slave gateway 1, slave gateway 2, and slave gateway 3. The multiple gateways include the master gateway, and slave gateway 1 and slave gateway 2 connected to the master gateway. The OLT currently does not allocate an uplink bandwidth to the slave gateway 3. Of course, the OLT can also allocate an uplink bandwidth of the non-first bandwidth part to the slave gateway 3, and its processing logic is the same as that of the slave gateways 1 and 2.

The bandwidth portion corresponding to the slave gateway 1 is the first bandwidth portion on the transmission bandwidth, and the bandwidth portion corresponding to the slave gateway 2 and the bandwidth portion corresponding to the master gateway are non-first bandwidth portions on the transmission bandwidth.

OLT can allocate three continuous bandwidth parts to slave gateway 1, slave gateway 2 and master gateway to aggregate these upstream bandwidths. Each bandwidth part includes a burst overhead part and a payload bearing part, wherein the corresponding part of the bandwidth of the burst overhead is implicitly allocated, that is, reserved by OLT, and the payload bearing part is explicitly allocated, allocated through BWmap, and OLT also informs the master gateway that the first part of the non-first bandwidth part in the transmission bandwidth can be used by setting the R bit of the OC body to 1. After receiving the first message from OLT, the master gateway can parse the first message to obtain these bandwidth allocation information and store them locally. In addition, the master gateway can connect the start and end positions of the three bandwidth parts head to tail and determine that the three bandwidth parts are continuous upstream bandwidths. Generally, the protection time length of the burst overhead is specified in the standard, and the burst preamble and burst delimiter are configured by OLT through the Burst_Profile message and the flag in BWmap. Therefore, the master gateway obtains the length of the first part of its own bandwidth part and the length of the first part of the bandwidth part of the slave gateway in the network to which it belongs, and forms the size and start and end positions of the corresponding bandwidth part with the corresponding payload bearing part. In addition, the master gateway can determine that the bandwidth portion of slave gateway 2 and the master gateway is a continuous bandwidth portion other than the first bandwidth portion, and can occupy the burst overhead of slave gateway 2 and the master gateway to transmit uplink data. Alternatively, the bandwidth corresponding to the burst overhead of slave gateway 1 can be implicitly allocated, that is, reserved by the OLT, and the payload bearing portion is explicitly allocated through BWmap. The bandwidth corresponding to the burst overhead portion of the master gateway and slave gateway 2 is explicitly allocated to the master gateway, and the bandwidth of the payload bearing portion of slave gateway 1, slave gateway 2 and the master gateway is explicitly allocated to slave gateway 1, slave gateway 2 and the master gateway respectively.

The master gateway can send indication information to slave gateway 1 and slave gateway 2 respectively to indicate the bandwidth portion allocated by OLT respectively, wherein the bandwidth corresponding to the burst overhead is implicitly allocated, that is, reserved by the master gateway, and the payload bearing portion is explicitly allocated and allocated through BWmap. Slave gateway 1 and slave gateway 2 can parse the indication information to obtain their respective bandwidth portions. Based on this, slave gateway 1, slave gateway 2 and the master gateway can each transmit burst frames in the allocated bandwidth portion. Each burst frame can include burst overhead and payload data. After receiving the burst frames from slave gateway 1 and slave gateway 2, the master gateway can recover the clock through their respective burst preambles and search for burst delimiters to obtain the payload data of slave gateway 1 and slave gateway 2.

As shown in FIG17 , in the traditional uplink transmission mode, even if the bandwidth allocated by the OLT to the slave gateway 1, the slave gateway 2 and the master gateway is continuous, when the master gateway performs burst transmission to the OLT in burst mode, in addition to occupying the burst overhead of its bandwidth portion to transmit synchronous data, when forwarding the uplink data of the slave gateway 1 and the slave gateway 2 to the OLT, it is still necessary to send the burst overhead in the uplink bandwidth of the slave gateway 1 and the slave gateway 2 respectively.

As shown in Figure 18, it is a structural diagram of another burst frame provided by an embodiment of the present application. Under the transmission mode provided by the present application, after the master gateway receives the burst frame from the slave gateway 1, it can recover the clock through the burst preamble in its burst overhead (i.e., the first part) and search for the burst delimiter, obtain the payload data of the slave gateway 1, and forward the protection time, burst preamble, burst delimiter and other parts to the OLT, as well as forward the payload data of the slave gateway 1. After the master gateway receives the burst frame from the slave gateway 2, it can recover the clock through its burst preamble and search for the burst delimiter, obtain the payload data of the slave gateway 2, and send the payload data of the master gateway itself (i.e., payload 4) through the uplink bandwidth corresponding to the burst overhead of the slave gateway 2, and send the payload data of the slave gateway 2 through the second part of the bandwidth part of the slave gateway 2. Then, the master gateway can occupy its bandwidth part to send its payload data (i.e., payload 5) to the OLT.

Based on this, the master gateway sends the payload data of slave gateway 1, slave gateway 2 and the master gateway to the OLT through the second part of each of the three burst frames, and can also occupy the burst overhead in the burst frames of slave gateway 2 and the master gateway to transmit the uplink data of the master gateway.

Compared to the traditional transmission method of three burst frames that generate three burst overheads arriving at the OLT, the transmission method provided in the embodiment of the present application can synthesize the three burst frames of the slave gateway 1, the slave gateway 2 and the master gateway as three burst subframes into one large burst frame, so that one large burst frame that generates one burst overhead arrives at the OLT, and the one large burst frame includes the payload data transmitted by the master gateway in the two burst overheads of the slave gateway 2 and the master gateway, that is, the uplink bandwidth corresponding to the latter two burst overheads is replaced by the payload data of the carrying master gateway by the carrying burst overhead.

Based on the above example, it can be seen that the present application can reduce 3 burst overheads to 1 burst overhead, achieving a reduction of about 66% in the amount of uplink bandwidth resources occupied by the burst overhead. Moreover, the greater the number of multiple gateways, the more obvious the reduction in the amount of uplink bandwidth resources occupied by the burst overhead. Therefore, the present application can improve the uplink bandwidth utilization, thereby improving the uplink data transmission efficiency.

In one embodiment, when multiple gateways include a master gateway, in order to support the OLT to obtain complete payload data of the master gateway, the embodiment of the present application provides an optional implementation method, including: step C.

Step C: When there are multiple gateways including a master gateway, the OLT assembles the first payload data transmitted on the first part of all non-first bandwidth parts and the second payload data transmitted on the second part of the bandwidth part corresponding to the master gateway to obtain the payload data of the master gateway.

In a possible example, in combination with the above-mentioned Figure 16, when the OLT receives uplink data within the transmission bandwidth, it first recovers the clock through the burst preamble in the burst overhead corresponding to the slave gateway 1 and searches for the burst delimiter, and continuously receives the second payload data of the slave gateway 1 in the second part of the bandwidth part of the slave gateway 1, receives the first payload data of the master gateway in the first part of the bandwidth part of the master gateway, receives the second payload data of the master gateway in the second part of the bandwidth part of the master gateway, receives the first payload data of the master gateway in the first part of the bandwidth part of the slave gateway 3, and receives the second payload data of the slave gateway 3 in the second part of the bandwidth part of the slave gateway 3.

In this case, the OLT can combine the first payload data received in the first part of the bandwidth part of the main gateway, the second payload data received in the second part of the bandwidth part of the main gateway, and the first payload data received in the first part of the bandwidth part of the slave gateway 3 to obtain the payload data of the main gateway, i.e., payload 3.

In a possible example, in combination with the above-mentioned Figure 18, when the OLT receives uplink data within the transmission bandwidth, it first recovers the clock through the burst preamble in the burst overhead corresponding to the slave gateway 1 and searches for the burst delimiter, and continuously receives the second payload data of the slave gateway 1 in the second part of the bandwidth part of the slave gateway 1, receives the first payload data of the master gateway in the first part of the bandwidth part of the slave gateway 2, receives the second payload data of the slave gateway 2 in the second part of the bandwidth part of the slave gateway 2, receives the first payload data of the master gateway in the first part of the bandwidth part of the master gateway, and receives the second payload data of the master gateway in the second part of the bandwidth part of the master gateway.

In this case, the OLT can combine the first payload data received in the first part of the bandwidth part of the slave gateway 2, the first payload data received in the first part of the bandwidth part of the master gateway, and the second payload data received in the second part of the bandwidth part of the master gateway, that is, combine payload 4 and payload 5 to obtain the payload data of the master gateway.

In one embodiment, when the multiple gateways do not include a master gateway, in order to support the OLT to obtain complete payload data of the master gateway, the embodiment of the present application provides an optional implementation method, including: step D.

Step D: When the multiple gateways do not include the main gateway, the OLT assembles the first payload data transmitted on the first part of all non-first bandwidth parts to obtain the payload data of the main gateway.

In a possible example, in combination with the above-mentioned Figure 11, when the OLT receives uplink data within the transmission bandwidth, it first recovers the clock through the burst preamble in the burst overhead corresponding to the slave gateway 1 and searches for the burst delimiter, and continuously receives the second payload data of the slave gateway 1 in the second part of the bandwidth part of the slave gateway 1, receives the first payload data of the master gateway in the first part of the bandwidth part of the slave gateway 2, receives the second payload data of the slave gateway 2 in the second part of the bandwidth part of the slave gateway 2, receives the first payload data of the master gateway in the first part of the bandwidth part of the slave gateway 3, and receives the second payload data of the slave gateway 3 in the second part of the bandwidth part of the slave gateway 3.

In this case, the OLT may combine the first payload data received in the first part of the bandwidth portion of the slave gateway 2 and the first payload data received in the first part of the bandwidth portion of the slave gateway 3 to obtain the payload data of the master gateway.

In a possible example, in combination with the above-mentioned Figure 14, when the OLT receives uplink data within the transmission bandwidth, it first recovers the clock through the burst preamble in the burst overhead corresponding to the master gateway and searches for the burst delimiter, and continuously receives the second payload data of the master gateway in the second part of the bandwidth part of the master gateway, receives the first payload data of the master gateway in the first part of the bandwidth part of slave gateway 2, receives the second payload data of slave gateway 2 in the second part of the bandwidth part of slave gateway 2, receives the first payload data of the master gateway in the first part of the bandwidth part of slave gateway 3, and receives the second payload data of slave gateway 3 in the second part of the bandwidth part of slave gateway 3.

In this case, the OLT can combine the second payload data of the main gateway received in the second part of the bandwidth part of the main gateway, the first payload data received in the first part of the bandwidth part of the slave gateway 2, and the first payload data received in the first part of the bandwidth part of the slave gateway 3, that is, combine payload 1 and payload 2 to obtain the payload data of the main gateway.

It is understandable that the main gateway and optical line terminal in the networking system include hardware structures and/or software modules corresponding to the execution of each function in order to realize the above functions. Those skilled in the art should easily realize that, in combination with the algorithm steps of each example described in the embodiments of the present application, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

The embodiment of the present application can divide the functional modules of the main gateway and the optical line terminal in the networking system according to the above method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

In the case of dividing each functional module in accordance with each function in the form of software, FIG19 shows a schematic diagram of the structure of a data transmission device 200. As shown in FIG19, the data transmission device 200 may include: a sending module 1301. The data transmission device 200 may be applied to the main gateway in the networking system shown in FIG4, and is used to execute the data transmission method executed by the main gateway in the above method embodiment.

The sending module 1301 is used to send a burst frame to the optical line terminal according to the transmission bandwidth; the transmission bandwidth includes multiple continuous bandwidth parts configured for multiple gateways; the synchronization data block of the burst frame occupies the first part of the first bandwidth part among the multiple bandwidth parts; the payload part of the burst frame occupies the second part of the first bandwidth part, and other bandwidth parts among the multiple bandwidth parts except the first bandwidth part.

In a possible embodiment, the payload part includes first payload data of the main gateway and second payload data of each of the multiple gateways; the first payload data occupies a first part of other bandwidth parts; and the second payload data of each gateway occupies a second part of the bandwidth part corresponding to the gateway in the transmission bandwidth.

In a possible embodiment, the plurality of gateways include a slave gateway; the apparatus further includes: a receiving module 1302;

The receiving module 1302 is used to receive a burst subframe sent by the slave gateway on the bandwidth portion corresponding to the slave gateway, where the burst subframe includes a synchronization data block of the burst subframe and second payload data of the slave gateway;

The sending module 1301 is specifically configured to send second payload data from the slave gateway on a second portion of the bandwidth portion corresponding to the slave gateway.

In a possible embodiment, the sending module 1301 is specifically used to: when the bandwidth part corresponding to the slave gateway is not the first bandwidth part in the transmission bandwidth, send the first payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway; or, when the bandwidth part corresponding to the slave gateway is the first bandwidth part in the transmission bandwidth, send the synchronization data block of the burst frame on the first part of the bandwidth part corresponding to the slave gateway.

In a possible embodiment, the sending module 1301 is specifically used to: when the bandwidth part corresponding to the main gateway is not the first bandwidth part in the transmission bandwidth, send continuous first payload data and second payload data of the main gateway on the first part and the second part of the bandwidth part corresponding to the main gateway; or, when the bandwidth part corresponding to the main gateway is the first bandwidth part in the transmission bandwidth, send the synchronization data block of the burst frame on the first part of the bandwidth part corresponding to the main gateway, and send the second payload data of the main gateway on the second part of the bandwidth part corresponding to the main gateway.

In a possible embodiment, the sending module 1301 is specifically used to: when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are continuous, send the first payload data of the master gateway continuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway; when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are discontinuous, send the first payload data of the master gateway discontinuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In a possible embodiment, the device further includes a processing module 1303. The processing module 1303 is configured to split the payload data of the main gateway into third payload data and other first payload data when the multiple gateways include a main gateway; the third payload data includes the second payload data of the main gateway and the continuous first payload data of the second part of the bandwidth portion corresponding to the main gateway occupied by the first part; the other first payload data is used to represent the discontinuous first payload data of the second part of the bandwidth portion corresponding to the main gateway occupied by the first part;

The processing module 1303 is further configured to, when the multiple gateways do not include the master gateway, split the payload data of the master gateway into first payload data corresponding to the first part of each non-first bandwidth part.

In a possible embodiment, the receiving module 1302 is further used to receive a first message sent by the optical line terminal, obtain multiple continuous bandwidth parts indicated by the first message, and use the first part of the transmission bandwidth that is not the first bandwidth part for data transmission according to the instruction of the optical line terminal.

In a possible embodiment, the first message includes first indication information and second indication information; the first indication information is used to indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway; the second indication information is used to indicate the required bandwidth of the synchronization data block; the receiving module 1302 is specifically used to: determine the start and end positions of each bandwidth part according to the first indication information and the second indication information; the starting position of the bandwidth part is the position that is separated from the starting position of the second part of the bandwidth part by the required bandwidth, and the ending position of the bandwidth part is the ending position of the second part of the bandwidth part; when the start and end positions of each bandwidth part are continuous, multiple continuous bandwidth parts are obtained.

In a possible embodiment, the first message also includes third indication information, and the third indication information is used to indicate the starting and ending positions of the first part of other bandwidth parts corresponding to the main gateway; the receiving module 1302 is specifically used to: when the starting and ending positions of the second part of the bandwidth part corresponding to each gateway and the starting and ending positions of the first part of the other bandwidth parts are continuous, obtain multiple continuous bandwidth parts.

In a possible embodiment, the sending module 1301 is also used to send a second message to a slave gateway among the multiple gateways; the second message includes second indication information and fourth indication information; the second indication information is used to indicate the required bandwidth of the synchronization data block; the fourth indication information is used to indicate the start and end positions of the second part of the bandwidth part corresponding to the slave gateway. In the case of dividing each functional module in accordance with each function in the form of software, Figure 20 shows a structural schematic diagram of another data transmission device 300. As shown in Figure 20, the data transmission device 300 may include: a receiving module 1401. The data transmission device 300 can be applied to the optical line terminal in the networking system in Figure 4, and is used to execute the data transmission method performed by the optical line terminal in the above method embodiment.

The receiving module 1401 is used to receive the burst frame sent by the main gateway according to the transmission bandwidth; the transmission bandwidth includes multiple continuous bandwidth parts configured for multiple gateways; the synchronization data block of the burst frame occupies the first part of the first bandwidth part among the multiple bandwidth parts; the payload part of the burst frame occupies the second part of the first bandwidth part, and other bandwidth parts among the multiple bandwidth parts except the first bandwidth part.

In a possible embodiment, the payload part includes first payload data of the main gateway and second payload data of each of the multiple gateways; the first payload data occupies a first part of other bandwidth parts; and the second payload data of each gateway occupies a second part of the bandwidth part corresponding to the gateway in the transmission bandwidth.

In a possible embodiment, the device further includes: a sending module 1402;

The sending module 1402 is used to send a first message to the main gateway, where the first message is used to indicate multiple continuous bandwidth parts configured for multiple gateways in the network where the main gateway is located, and instruct the main gateway to use the first part of other bandwidth parts for data transmission.

In a possible embodiment, the first message includes first indication information and second indication information; the first indication information is used to indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway; and the second indication information is used to indicate the required bandwidth of the synchronization data block.

In a possible embodiment, the first message further includes third indication information, where the third indication information is used to indicate the start and end positions of the first part of the other bandwidth parts corresponding to the primary gateway.

In a possible embodiment, the multiple gateways include a slave gateway; a receiving module 1401, specifically configured to:

The second payload data of the slave gateway sent by the master gateway is received on the second part of the bandwidth part corresponding to the slave gateway.

In a possible embodiment, the receiving module 1401 is specifically used to: when the bandwidth part corresponding to the slave gateway is not the first bandwidth part in the transmission bandwidth, receive the first payload data of the master gateway sent by the master gateway on the first part of the bandwidth part corresponding to the slave gateway; or, when the bandwidth part corresponding to the slave gateway is the first bandwidth part in the transmission bandwidth, receive the synchronization data block of the burst frame sent by the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In a possible embodiment, the multiple gateways also include a master gateway, and the receiving module 1401 is specifically used to: when the bandwidth part corresponding to the master gateway is not the first bandwidth part in the transmission bandwidth, receive the first payload data and the second payload data of the master gateway sent continuously by the master gateway on the first part and the second part of the bandwidth part corresponding to the master gateway; or, when the bandwidth part corresponding to the master gateway is the first bandwidth part in the transmission bandwidth, receive the synchronization data block of the burst frame sent by the master gateway on the first part of the bandwidth part corresponding to the master gateway, and receive the second payload data of the master gateway sent by the master gateway on the second part of the bandwidth part corresponding to the master gateway.

In a possible embodiment, the receiving module 1401 is specifically used to: when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are continuous, receive the first payload data of the master gateway continuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway; when the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are discontinuous, receive the first payload data of the master gateway discontinuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway.

In a possible embodiment, the device further includes: a processing module 1403;

The processing module 1403 is used to assemble the first payload data transmitted on the first part of all non-first bandwidth parts and the second payload data transmitted on the second part of the bandwidth part corresponding to the main gateway to obtain the payload data of the main gateway when the multiple gateways include the main gateway. In a possible embodiment, the processing module 1403 is also used to assemble the first payload data transmitted on the first part of all non-first bandwidth parts to obtain the payload data of the main gateway when the multiple gateways do not include the main gateway.

In the case of implementing the functions of the above-mentioned integrated modules in the form of hardware, the embodiment of the present application provides another possible structure of the data transmission device involved in the above-mentioned embodiment. As shown in Figure 21, as a data transmission device, the data transmission device 400 may include: a processor 1501, a bus 1504. Optionally, the data transmission device 400 may also include a memory 1502; optionally, the data transmission device 400 may also include a communication interface 1503.

For example, some or all functions of the modules such as the sending module 1301, the receiving module 1302, and the processing module 1303 included in the data transmission device 200 in FIG. 19 may also be implemented by the processor 1501. For another example, some or all functions of the modules such as the receiving module 1401, the sending module 1402, and the processing module 1403 included in the data transmission device 300 in FIG. 20 may also be implemented by the processor 1501.

Processor 1501 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present application. The processor 1501 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the embodiments of the present application. Processor 1501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

The communication interface 1503 is used to connect to other devices via a communication network, which may be Ethernet, wireless access network, wireless local area network (WLAN), etc.

The memory 1502 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or 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.

As a possible implementation, the memory 1502 may exist independently of the processor 1501, and the memory 1502 may be connected to the processor 1501 via a bus 1504 to store instructions or program codes. When the processor 1501 calls and executes the instructions or program codes stored in the memory 1502, the data transmission method provided in the embodiment of the present application can be implemented.

In another possible implementation, the memory 1502 may also be integrated with the processor 1501 .

The bus 1504 may be an extended industry standard architecture (EISA) bus, etc. The bus 1504 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, FIG21 only uses one thick line, but does not mean that there is only one bus or one type of bus.

Some embodiments of the present application provide a computer-readable storage medium (for example, a non-transitory computer-readable storage medium), which stores computer program instructions. When the computer program instructions are executed on a computer, the computer executes the data transmission method described in any of the above embodiments.

Exemplarily, the above-mentioned computer-readable storage medium may include, but is not limited to: magnetic storage devices (e.g., hard disks, floppy disks or magnetic tapes, etc.), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards and flash memory devices (e.g., erasable programmable read-only memories (EPROMs), cards, sticks or key drives, etc.).

The various computer-readable storage media described herein can represent one or more devices and/or other machine-readable storage media for storing information.

The term "machine-readable storage medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

An embodiment of the present application provides a computer program product including instructions. When the computer program product is run on a computer, the computer is enabled to execute the data transmission method described in any one of the above embodiments.

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

Claims (22)

1. A data transmission method, characterized in that it is applied to a main gateway, comprising: A burst frame is sent to an optical line terminal according to a transmission bandwidth; the transmission bandwidth includes a plurality of continuous bandwidth parts configured for a plurality of gateways; a synchronization data block of the burst frame occupies a first part of a first bandwidth part among the plurality of bandwidth parts; a payload part of the burst frame occupies a second part of the first bandwidth part, and other bandwidth parts among the plurality of bandwidth parts except the first bandwidth part; the payload part includes first payload data of the main gateway and second payload data of each gateway among the plurality of gateways; the first payload data occupies a first part of the other bandwidth parts; and the second payload data of each gateway occupies a second part of the bandwidth part corresponding to the gateway in the transmission bandwidth. 2. The method according to claim 1, wherein the plurality of gateways include a slave gateway; the method further comprising: receiving a burst subframe sent by the slave gateway on the bandwidth portion corresponding to the slave gateway, wherein the burst subframe includes a synchronization data block of the burst subframe and second payload data of the slave gateway; The step of sending a burst frame to an optical line terminal according to the transmission bandwidth comprises: The second payload data of the slave gateway is sent on a second portion of the bandwidth portion corresponding to the slave gateway. 3. The method according to claim 2, wherein the step of sending a burst frame to an optical line terminal according to the transmission bandwidth further comprises: In the case where the bandwidth portion corresponding to the slave gateway is not the first bandwidth portion in the transmission bandwidth, sending the first payload data of the master gateway on the first portion of the bandwidth portion corresponding to the slave gateway; or, In a case where the bandwidth portion corresponding to the slave gateway is the first bandwidth portion in the transmission bandwidth, the synchronization data block of the burst frame is sent on the first portion of the bandwidth portion corresponding to the slave gateway. 4. The method according to claim 2, wherein the plurality of gateways further comprises the master gateway, and the sending of burst frames to the optical line terminal according to the transmission bandwidth further comprises: In the case where the bandwidth portion corresponding to the master gateway is not the first bandwidth portion in the transmission bandwidth, sending continuous first payload data and second payload data of the master gateway on the first part and the second part of the bandwidth portion corresponding to the master gateway; or, When the bandwidth part corresponding to the master gateway is the first bandwidth part in the transmission bandwidth, the synchronization data block of the burst frame is sent on the first part of the bandwidth part corresponding to the master gateway, and the second payload data of the master gateway is sent on the second part of the bandwidth part corresponding to the master gateway. 5. The method according to claim 4, wherein the step of sending a burst frame to an optical line terminal according to the transmission bandwidth further comprises: In the case where the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are continuous, sending the first payload data of the master gateway continuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway; When the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are discontinuous, the first payload data of the master gateway that is discontinuous with the second payload data of the master gateway is sent on the first part of the bandwidth part corresponding to the slave gateway. 6. The method according to claim 1, characterized in that the method further comprises: In the case where the multiple gateways include the master gateway, the payload data of the master gateway is split into third payload data and other first payload data; the third payload data includes the second payload data of the master gateway and first payload data that occupies a second continuous portion of the first portion of the bandwidth portion corresponding to the master gateway; the other first payload data is used to represent the first payload data that occupies a second discontinuous portion of the first portion of the bandwidth portion corresponding to the master gateway; In a case where the plurality of gateways do not include the master gateway, the payload data of the master gateway is split into first payload data corresponding to the first part of each non-first bandwidth part. 7. The method according to claim 1, characterized in that the method further comprises: A first message sent by the optical line terminal is received, the multiple continuous bandwidth parts indicated by the first message are acquired, and a first part of the transmission bandwidth that is not the first bandwidth part is used for data transmission according to the instruction of the optical line terminal. 8. The method according to claim 7, characterized in that the first message includes first indication information and second indication information; the first indication information is used to indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway; the second indication information is used to indicate the required bandwidth of the synchronization data block; the obtaining of the plurality of continuous bandwidth parts indicated by the first message comprises: Determine the starting and ending positions of each bandwidth part according to the first indication information and the second indication information; the starting position of the bandwidth part is a position that is spaced from the starting position of the second part of the bandwidth part by the required bandwidth, and the ending position of the bandwidth part is an ending position of the second part of the bandwidth part; When the start and end positions of the bandwidth parts are continuous, a plurality of continuous bandwidth parts are obtained. 9. The method according to claim 8, characterized in that the first message further includes third indication information, and the third indication information is used to indicate the starting and ending positions of the first part of the other bandwidth part corresponding to the main gateway. 10. The method according to claim 8, further comprising: A second message is sent to a slave gateway among the multiple gateways; the second message includes the second indication information and fourth indication information; the second indication information is used to indicate the required bandwidth of the synchronization data block; the fourth indication information is used to indicate the starting and ending positions of the second part of the bandwidth part corresponding to the slave gateway. 11. A data transmission method, characterized in that it is applied to an optical line terminal, the method comprising: A burst frame sent by a main gateway is received according to a transmission bandwidth; the transmission bandwidth includes a plurality of continuous bandwidth parts configured for a plurality of gateways; a synchronization data block of the burst frame occupies a first part of a first bandwidth part among the plurality of bandwidth parts; a payload part of the burst frame occupies a second part of the first bandwidth part, and other bandwidth parts among the plurality of bandwidth parts except the first bandwidth part; the payload part includes first payload data of the main gateway and second payload data of each gateway among the plurality of gateways; the first payload data occupies a first part of the other bandwidth parts; and the second payload data of each gateway occupies a second part of the bandwidth part corresponding to the gateway in the transmission bandwidth. 12. The method according to claim 11, characterized in that the method further comprises: A first message is sent to the master gateway, where the first message is used to indicate a plurality of continuous bandwidth portions configured for a plurality of gateways in the network where the master gateway is located, and to instruct the master gateway to use a first portion of the other bandwidth portions for data transmission. 13. The method according to claim 12 is characterized in that the first message includes first indication information and second indication information; the first indication information is used to indicate the start and end positions of the second part of the bandwidth part corresponding to each gateway; the second indication information is used to indicate the required bandwidth of the synchronization data block. 14. The method according to claim 13, characterized in that the first message further includes third indication information, and the third indication information is used to indicate the start and end positions of the first part of the other bandwidth part corresponding to the primary gateway. 15. The method according to claim 11, wherein the plurality of gateways include a slave gateway; and the step of receiving a burst frame sent by a master gateway according to a transmission bandwidth comprises: The second payload data of the slave gateway sent by the master gateway is received on a second part of the bandwidth part corresponding to the slave gateway. 16. The method according to claim 15, wherein the receiving the burst frame sent by the main gateway according to the transmission bandwidth further comprises: In a case where the bandwidth portion corresponding to the slave gateway is not the first bandwidth portion in the transmission bandwidth, receiving the first payload data of the master gateway sent by the master gateway on the first portion of the bandwidth portion corresponding to the slave gateway; or, In a case where the bandwidth portion corresponding to the slave gateway is the first bandwidth portion in the transmission bandwidth, the synchronization data block of the burst frame sent by the master gateway is received on the first part of the bandwidth portion corresponding to the slave gateway. 17. The method according to claim 15, wherein the plurality of gateways further comprises the master gateway, and the receiving the burst frame sent by the master gateway according to the transmission bandwidth further comprises: In the case where the bandwidth portion corresponding to the master gateway is not the first bandwidth portion in the transmission bandwidth, receiving first payload data and second payload data of the master gateway continuously sent by the master gateway on the first part and the second part of the bandwidth portion corresponding to the master gateway; or, In the case where the bandwidth part corresponding to the main gateway is the first bandwidth part in the transmission bandwidth, the synchronization data block of the burst frame sent by the main gateway is received on the first part of the bandwidth part corresponding to the main gateway, and the second payload data of the main gateway sent by the main gateway is received on the second part of the bandwidth part corresponding to the main gateway. 18. The method according to claim 17, wherein the receiving the burst frame sent by the main gateway according to the transmission bandwidth further comprises: In the case where the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are continuous, receiving the first payload data of the master gateway continuous with the second payload data of the master gateway on the first part of the bandwidth part corresponding to the slave gateway; When the second part of the bandwidth part corresponding to the master gateway and the first part of the bandwidth part corresponding to the slave gateway are discontinuous, the first part of the bandwidth part corresponding to the slave gateway receives the first payload data of the master gateway discontinuous with the second payload data of the master gateway. 19. The method according to claim 11, characterized in that the method further comprises: In the case where the multiple gateways include the master gateway, the first payload data transmitted on the first part of all non-first bandwidth parts and the second payload data transmitted on the second part of the bandwidth part corresponding to the master gateway are assembled to obtain the payload data of the master gateway. 20. The method according to claim 11, characterized in that the method further comprises: In the case that the plurality of gateways do not include the master gateway, the first payload data transmitted on the first parts of all non-first bandwidth parts are assembled to obtain the payload data of the master gateway. 21. A data transmission device, characterized in that it comprises: a memory and a processor; the memory and the processor are coupled; the memory is used to store instructions executable by the processor; when the processor executes the instructions, it executes the method described in any one of claims 1-10, or executes the method described in any one of claims 11-20. 22. A computer-readable storage medium, characterized in that computer instructions are stored on the computer-readable storage medium, and when the computer instructions are executed on a computer, the computer executes the method as described in any one of claims 1-10, or the computer executes the method as described in any one of claims 11-20.