WO2020147661A1

WO2020147661A1 - Signal transmission method and apparatus, network device and computer-readable storage medium

Info

Publication number: WO2020147661A1
Application number: PCT/CN2020/071506
Authority: WO
Inventors: 陶程; 王春光; 王科; 刘子超
Original assignee: 中兴通讯股份有限公司
Priority date: 2019-01-14
Filing date: 2020-01-10
Publication date: 2020-07-23
Also published as: CN111435898A; CN111435898B

Abstract

Disclosed are a signal transmission method and apparatus, a network device and a computer-readable storage medium. The method comprises: mapping a data service at a client side into a first-type frame; mapping the first-type frame into a second-type frame by means of GMP mapping, wherein the mapping of the first-type frame into the second-type frame by means of GMP mapping is performed taking timeslots as units, an overhead of the second-type frame comprises a JC field, and the JC field is used for transmitting a target parameter of the data service; and sending the target parameter of the data service to a clock chip by means of the overhead of the second-type frame, wherein the target parameter is used for recovering, by means of the clock chip, a reference clock at the client side.

Description

Signal transmission method and device, network equipment and computer readable storage medium

This application claims the priority of the Chinese patent application filed with the Chinese Patent Office with application number 201910032224.3 on January 14, 2019. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to optical transmission technology, such as a signal transmission method and device, network equipment, and computer-readable storage medium.

Background technique

With the rapid development of Internet and mobile Internet applications, many countries around the world have rushed to develop the technology development of the 5th Generation (5G) network. Both China and the European Union have invested a lot of funds and R&D efforts for this, and it is expected to start in 2020 5G commercial services. According to the 5G promotion work deployment proposed by the Ministry of Industry and Information Technology and the 5G commercial plans of the three major operators, China will start the second phase of 5G network testing in 2017, and conduct large-scale trial networking in 2018, and on this basis, in 2019 Start 5G network construction, and officially launch commercial services as soon as 2020.

In the optical transport network (Optical Transport Network, OTN) use scenario for 5G bearers, there are higher requirements for data transmission delay and jitter. In the OTN mapping method, the delay caused by the commonly used General Mapping Procedure (GMP) mapping is closely related to the amount of data buffered in the First Input First Output (FIFO). In low-speed service processing, the FIFO bit width is low, while in the 5G bearer system, the data processing bit width is greatly increased. According to the original processing method, the amount of data buffered in the FIFO is large, and the corresponding delay is large. It cannot meet the requirements for low latency in the 5G system.

Summary of the invention

The embodiments of the present application provide a signal transmission method and device, network equipment, and computer-readable storage medium.

The signal transmission method provided by the embodiment of the present application includes:

The data service on the client side is mapped to the first type of frame; the first type of frame is mapped to the second type of frame through GMP mapping, and the first type of frame is mapped to the second type of frame through the GMP mapping. The second type of frame is based on a time slot as a unit, and the overhead of the second type of frame includes a Justification Control (JC) field, and the JC field is used to transmit the target parameter of the data service;

The target parameter of the data service is sent to a clock chip through the overhead of the second type of frame, where the target parameter is used by the clock chip to restore the client-side reference clock.

The signal transmission device provided by the embodiment of the present application includes:

The first mapping unit is configured to map the data service on the client side into the first type of frame;

The second mapping unit is configured to map the first type of frame to the second type of frame through GMP mapping, and the mapping of the first type of frame to the second type of frame through the GMP mapping is based on It is performed in units of time slots, and the overhead of the second type frame includes a JC field, and the JC field is used to transmit the target parameter of the data service;

The transmission unit is configured to send the target parameter of the data service to the clock chip through the overhead of the second type frame, wherein the target parameter is used by the clock chip to restore the client-side reference clock.

The computer-readable storage medium provided by the embodiment of the present application is configured to store a computer program, and the computer program enables a computer to execute the above-mentioned signal transmission method.

The network device provided by the embodiment of the present application includes a processor and a memory, where the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned signal transmission method.

BRIEF DESCRIPTION

FIG. 1 is a schematic flowchart of a signal transmission method provided by an embodiment of this application;

2 is a schematic diagram of signal transmission between multiple modules provided by an embodiment of the application;

FIG. 3 is a schematic diagram of time slot division in the payload of an optical network flexible (Flexible-OTN, FlexO) interface frame provided by an embodiment of the application;

Figure 4 is a schematic diagram of GMP mapping sigma-delta calculation provided by an embodiment of the application;

5 is a schematic diagram of the structural composition of a signal transmission device provided by an embodiment of the application;

Fig. 6 is a schematic structural diagram of a network device provided by an embodiment of the present application.

detailed description

In order to understand the features and technical contents of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below with reference to the drawings. The accompanying drawings are for reference only and are not intended to limit the embodiments of the present application.

Fig. 1 is a schematic flowchart of a signal transmission method provided by an embodiment of the application. As shown in Fig. 1, the method includes the following steps.

Step 101: Map the data service on the client side to the first type of frame;

Step 102: Map the first type frame to the second type frame through GMP mapping, and the mapping of the first type frame to the second type frame through the GMP mapping is based on a time slot unit In progress, the overhead of the second type frame includes a JC field, and the JC field is used to transmit the target parameter of the data service.

In the embodiment of the present application, the first type of frame may be a flexible rate optical digital unit (ODUflex) frame, and the second type of frame may be called a FlexO interface frame or a FlexO frame.

In this embodiment of the application, the target parameter is Cn.

In the embodiment of the present application, when the GMP mapping is mapped based on the time slot as a unit, the calculation frequency of the GMP mapping is greater than or equal to the first threshold, and the container size selected by the GMP mapping is greater than or equal to the second threshold. In one embodiment, a larger container can be selected in the GMP mapping in combination with a higher mapping calculation frequency to reduce the jitter of the FIFO waterline.

In the embodiment of the present application, the number of time slots occupied by the first type frames obtained by mapping data services of different rates is different, and the JC fields corresponding to all the time slots occupied by the first type frames are used to transmit the data The target parameters of the business.

In the embodiment of the present application, the JC fields corresponding to all the time slots occupied by the frame of the first type transmit the target parameters of the data service, which is implemented in one of the following two ways.

Manner 1: The JC field corresponding to all the time slots occupied by the first type frame is used to transmit the size of the data container occupied by each time slot, and the size of the data container occupied by each time slot is k*Cn /N, k is a coefficient, Cn is the target parameter, and N is the number of time slots occupied by the first type frame carrying the data service.

Manner 2: The JC fields corresponding to all time slots occupied by the first type frame are used to transmit the data container size occupied by N time slots, and the data container size occupied by the N time slots is k*Cn , K is the coefficient, Cn is the target parameter, and N is the number of time slots occupied by the first type frame carrying the data service.

In the embodiment of the present application, when the frame of the first type is mapped to the frame of the second type through the GMP mapping, the method may further include the following steps.

According to the first parameter, a sigma-delta calculation is performed on each time slot particle to generate a data filling envelope, and the value of the first parameter is rounded to k*Cn/N The obtained value, or the value of the first parameter, is a value obtained by rounding k*Cn.

sigma-delta calculation is an algorithm defined in G.709.

Here, the first parameter is Δ(Cm).

In the embodiment of this application, the payload part of the second type frame is divided into T_n_ts time slots, and through the JC field included in the overhead of the second type frame, every T_n_frame second type frame is used to transmit T_n_oh The target parameter of the time slot, the target parameter of the T_n_ts time slot is transmitted through T_n_frame*(T_n_ts/T_n_oh) second type frames, wherein the update period of the JC field is T_n_frame*(T_n_ts/T_n_oh) second type frames .

In an embodiment, in an update period of the JC field, the number of time slot particles occupied by the first type frame is determined according to the ratio of the transmission rate of the first type frame to the second type frame.

In one embodiment, the second type frame has D_ts_num time slots that can carry service data, and within the N time slots occupied by the first type frame, each time slot has T_n_frame*(T_n_ts/T_n_oh )*D_ts_num/T_n_ts time slot particles, the number of time slot particles that can be filled in the first type frame is:

T_n_frame*(T_n_ts/T_n_oh)*D_ts_num/T_n_ts*N.

Multiply the ratio of the transmission rate of the first type frame to the second type frame by the number of time slot particles and divide by N to obtain the number of time slot particles occupied by the first type frame in the update period , And used as the first parameter of the data filling envelope in the GMP mapping. Or, multiply the ratio of the transmission rate of the first type frame to the second type frame by the number of time slot particles to obtain the number of time slot particles occupied by the first type frame in the update period, and As the first parameter of the data filling envelope in the GMP mapping.

In the embodiment of this application, the filling envelope is calculated once for each time slot particle occupied by the first type frame, and when the target time slot particle belongs to the time slot occupied by the first type frame, the calculation is performed once The data in the GMP mapping fills the envelope.

Step 103: Send the target parameter of the data service to the clock chip through the overhead of the second type of frame, where the target parameter is used by the clock chip to restore the client-side reference clock.

In an embodiment, step 102 is the work of mapping and sending to the optical fiber interface (line port transmission), and step 103 includes demapping and clock recovery (line port reception). The demapping here corresponds to the corresponding envelope recovery in the mapping direction in step 102 to extract data, and the clock chip is used to recover the clock.

In the technical solution of the embodiment of the present application, the data service on the client side is mapped to the first type of frame; the first type of frame is mapped to the second type of frame through GMP, and the first type of frame is passed through the The GMP mapping to the second type of frame is based on the unit of time slot, and the overhead of the second type of frame includes the JC field, and the JC field is used to transmit the target parameter of the data service; The overhead of the second type of frame sends the target parameter of the data service to the clock chip, and the target parameter is used by the clock chip to restore and implement the client-side reference clock. In this way, while supporting multiple customer service access, smaller particles are used for filling and data judgment during GMP mapping, which reduces the jitter amplitude of the data buffer fifo waterline, thereby reducing the delay on the data transmission path. Time and jitter: The clock chip is used to recover the clock through Cn information, which avoids the conversion of Cn information within the digital logic and optimizes the clock path.

FIG. 2 is a schematic diagram of signal transmission between multiple modules according to an embodiment of the application. As shown in FIG. 2, the dotted line represents the clock path, and the solid line represents the data path.

The signal transmission process of the clock path: (1) Cn extraction module: extract Cn information according to the client side received and recovered clock through the sigma-delta algorithm, (2) JC overhead module: encode the Cn information into the JC overhead of the FlexO interface frame ( The JC field in the overhead is referred to as JC overhead); (3) JC overhead extraction module: extracts the JC overhead from the FlexO interface frame and obtains the Cn information transmitted in the overhead after decoding; (4) Cn information interface module: to the clock chip Provide an interface for Cn information; (5) Clock processing chip: The clock can be recovered according to the numerator and denominator information of Cn. In one embodiment, the client-side serializer/deserializer (Serializer/Deserializer, SerDes) receives the recovered clock and the local system clock through the sigma-delta algorithm in the Cn extraction module to calculate the Cn information, and the JC overhead module The Cn information is encoded and inserted into the JC overhead of the FlexO interface frame. The FlexO interface frame is sent from the line side SerDes, and the Cn information is transmitted in the FlexO interface frame. After the line side receives the FlexO interface frame, the frame format of the FlexO interface frame The overhead information of the JC field is extracted in the JC overhead extraction module FlexO on the receiving side to obtain the Cn information transmitted from the line side to the opposite end. This information is buffered in the Cn information interface module and read through software or the SPI interface of the chip. Or provide it to the clock chip in other ways. In the clock chip, the clock is recovered according to the Cn information and the base frequency clock of the board input to the clock chip as the reference clock of the SerDes on the client side. The SerDes generates the client sending clock according to the clock. Complete the clock transfer. The value of the Cn information transmitted in the FlexO overhead JC field is divided into two types. The first method refers to the size of the data container occupied by each time slot in the time slot occupied by the ODUflex frame carrying the data service, and the JC overhead corresponding to the time slot occupied by the ODUflex frame carrying the data service is equal to Pass this value, namely k*Cn/N; the second type is the size of the data container occupied by N time slots, and the JC overhead corresponding to the time slot occupied by the ODUflex frame carrying the data service is passed this value, namely k *Cn.

The signal transmission process of the data path: (1) Client-side service transcoding and mapping module: complete the mapping of client-side services to a unified ODUflex frame; (2) GMP mapping and FlexO framing module: complete ODUflex frame to FlexO interface frame (3) GMP de-mapping and FlexO interface frame positioning module: complete the de-mapping of FlexO interface frames to ODUflex frames; (4) client-side service recovery module: complete the de-mapping of ODUflex frames to client-side services. In one embodiment, the client-side access service completes the mapping from the client service to the ODUflex frame through the transcoding module and the Bit-synchronous Mapping Procedure (BMP) mapping method. For example, the 25GE service passes 66B-257B transcoding and BMP. Mapping to ODUflex, CPRI7 services are mapped to ODUflex through 10B-66B transcoding and BMP, and GE services are mapped to ODU0 through the Frame Mapped Generic Framing Procedure (GFP-F). In the GMP mapping (the mapping from the first type of frame to the second type of frame) module, the system bus bandwidth is calculated according to the current system clock and the bus bit width, and the sigma-delta algorithm is used according to the ratio of the bandwidth to the FlexO SerDes sending data bandwidth As shown in the generation of an envelope for carrying Flexo data in the system, the GMP mapping is performed based on the FlexO data envelope.

The payload part of the FlexO interface frame is divided into T_n_ts (24) time slots, as shown in Figure 3, the particle size of each time slot is TS_bit_num (128bit), and each frame has D_ts_num (5136) time slots that can carry data. , FlexO's frame format is that each frame is composed of P_bit_num (128*5140) bits data, and the frame head alignment mark (Alignment Marker, AM) and overhead (overhead, OH) are at the top of each frame, occupying a total of OH_bit_num (2 *128+2*128) bits, the payload part is D_bit_num=P_bit_num-OH_bit_num, that is, 128*(5140-4)btis. In the FlexO overhead JC field, every T_n_frame(8) multi-frame transmits the Cn of T_n_oh(3) time slots. To complete a FlexO JC overhead of T_n_ts(24) time slots requires T_n_frame*(T_n_ts/T_n_oh)(64) Multi-frame, namely T_n_frame*(T_n_ts/T_n_oh) (64) multi-frame is a JC update period. Cn uses JC to transmit. When the data service needs to occupy N time slots, the JC overhead corresponding to the occupied time slot is transmitted with the same value. This value is the ratio of the customer service rate to the FlexO rate multiplied by the coefficient k, and After each update cycle, Cn is calculated in accordance with the calculation regulations in the G.709 standard to produce JC1, JC2, JC3, JC4, JC5, and JC6. JC1, JC2, JC3, JC4, JC5, JC6 are passed through FlexO's JC overhead.

For the first method mentioned in the clock path above, in a JC update period, when the data service needs to occupy N time slots, the ratio of the data service to the frame transmission rate of the bearer interface is calculated to calculate the data service occupation The number of time slot particles, such as 25GE service, occupies 24 time slots (N=24), each time slot occupies 13359 time slot particles; CPRI7 service, occupies 8 time slots (N=8), each time slot occupies 12950 time slot particles. When GMP mapping is performed on ODUflex, the data filling envelope is calculated. In the N time slots occupied by the data service, each time slot has T_n_frame*(T_n_ts/T_n_oh)(64)*D_ts_num(5136)/T_n_ts( 24) TS_bit_num (128bit)bits time slot particles, the positions that can be filled by data services are T_n_frame*(T_n_ts/T_n_oh)(64)*D_ts_num(5136)/T_n_ts(24)*N time slot particles, according to the actual client side The proportional relationship between the service rate and the FlexO interface frame rate is multiplied by the number of particles mentioned above and divided by N to obtain the number of time slot particles occupied by the customer service in each time slot in the entire update cycle, which is used as the GMP calculation data filling envelope ΔCm. For example, 25GE service occupies 13359 time slot particles in each time slot in the entire multiframe, ΔCm=13359, and CPRI7 service occupies 12590 time slot particles in each time slot in the entire multiframe, ΔCm=12590. Each time slot particle that can be occupied by a data service is subject to GMP sigma-delta calculation to generate a filling envelope. Whenever this 128 time slot particle is the time slot occupied by the ODUflex frame currently carrying the data service, the sigma -The delta algorithm is calculated once to generate the GMP mapped data envelope. The method of generating the GMP-mapped data envelope is when the Cm obtained by the sigma-delta algorithm is greater than or equal to P_server (maximum number of data ntities in the server payload area), the current time The slot is valid data, and the read FIFO enable is generated; when the Cm obtained by the sigma-delta algorithm is less than P_server, the current time slot is filled with data, and the read FIFO enable is not generated. When the read enable is valid, the data buffered in the FIFO is The business is mapped into the FlexO payload, as shown in Figure 4.

For the second method mentioned in the clock path above, in a JC update cycle, when the data service needs to occupy N time slots, the time occupied by the data service is calculated according to the ratio of the data service to the frame transmission rate of the bearer interface. The number of slot particles, such as 25GE service, occupies 24 time slots (N=24), a total of 320626.2383 time slot particles, and each time slot occupies 320626.2383/N time slot particles; CPRI7 service occupies 8 time slots (N = 8), a total of 10367.4611 time slot particles are occupied, and each time slot occupies 103607.4611/N time slot particles. When GMP mapping is performed on ODUflex, the data filling envelope is calculated. In the N time slots occupied by the data service, each time slot has T_n_frame*(T_n_ts/T_n_oh)(64)*D_ts_num(5136)/T_n_ts( 24) TS_bit_num(128bit)bits time slot particles, the positions that can be filled by data services are T_n_frame*(T_n_ts/T_n_oh)(64)*D_ts_num(5136)/T_n_ts(24)*N time slot particles, according to the actual client side The proportional relationship between the service rate and the FlexO interface frame rate is multiplied by the number of particles mentioned above to obtain the number of time slot particles occupied by the customer service in the entire update period, which is used as the ΔCm of the GMP calculation data filling envelope. For example, the 25GE service occupies 320626 time slot particles in the entire multiframe, ΔCm=320626, and the CPRI7 service occupies 103607 time slot particles in the entire multiframe, ΔCm=103607. Each 128-bit time slot particle that can be occupied by a data service must perform GMP sigma-delta calculation to generate a filling envelope. Whenever this 128-bit time slot particle is the time slot occupied by the ODUflex frame currently carrying the data service, The sigma-delta algorithm calculates once to generate the GMP mapped data envelope. The method of generating the GMP mapped data envelope is: when the Cm obtained by the sigma-delta algorithm is greater than or equal to P_server, the current time slot is valid data, and the read FIFO is enabled; when the Cm obtained by the sigma-delta algorithm is less than P_server, the current The time slot is filled with data and no read FIFO enable is generated. When the read enable is valid, the data service buffered in the FIFO is mapped to the FlexO payload. As shown in Figure 4.

The FlexO interface frame is sent to the optical port of the route through SerDes, and on the receiving side of the line, after processing by modules such as framing, the overhead position is calculated according to the frame structure, and the overhead such as JC is extracted. Calculate the system bus bandwidth according to the current system clock and bus bit width, and use the sigma-delta algorithm to generate an envelope for carrying FlexO data in the system according to the ratio of the bandwidth to the FlexO SerDes sending data bandwidth. As shown in GMP demapping It is based on the FlexO data envelope, which is the same as the previous GMP mapping module. The GMP demapping module performs sigma-delta calculation based on the integer part of the Cm value extracted from the JC overhead and the aforementioned FlexO data envelope to obtain the ODUflex valid data indication envelope in the FlexO interface frame, and writes this envelope as the write indication FIFO is used as the line side to receive and recover the ODUflex frame. The ODUflex frame is demapped and decoded by the client-side service recovery module in Figure 2 to obtain client-side data, which is sent to the client port through the client-side SerDes under the client's sending clock.

The technical solution of the embodiment of the present application realizes the reprinting, sending, transmission and reception of various customer services to the FlexO interface frame on the line side and the recovery of customer services. The GMP mapping in this method does not perform FlexO's continuous M*128bit time slot particles, all of which are data service signals or all filling bits, but take 128bit time slot particles as the unit for calculation and judgment, reducing the continuous 128*M when mapping The delay jitter caused by the filling bit is optimized from the data path; the clock chip is used to avoid the conversion of Cn information in the digital logic, and the ratio information is directly provided to the external clock chip for clock recovery, which is performed on the clock path了Optimized.

Fig. 5 is a schematic structural composition diagram of a signal transmission device provided by an embodiment of the application. As shown in Fig. 5, the signal transmission device includes:

The first mapping unit 501 is configured to map the data service on the client side into the first type of frame.

The second mapping unit 502 is configured to map the first type of frame to the second type of frame through GMP mapping, and the mapping of the first type of frame to the second type of frame through the GMP mapping is Performed on a time slot basis, the overhead of the second type frame includes a JC field, and the JC field is used to transmit the target parameter of the data service.

The transmitting unit 503 is configured to send the target parameter of the data service to the clock chip through the overhead of the second type frame, and the target parameter is used by the clock chip to restore the client-side reference clock.

The transmitting unit transmits the overhead of the second type of frame while transmitting the second type of frame, and sends the target parameter of the data service to the clock chip through the overhead of the second type of frame.

Those skilled in the art should understand that the realization function of each unit in the signal transmission device shown in FIG. 5 can be understood with reference to the relevant description of the aforementioned signal transmission method. The function of each unit in the signal transmission device shown in FIG. 5 can be realized by a program running on the processor, or by a specific logic circuit, such as programmable logic (Field Programmable Gata Array, FPGA), etc. .

Fig. 6 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device 600 shown in FIG. 6 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

In an embodiment, as shown in FIG. 6, the network device 600 may further include a memory 620. The processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.

The memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.

The embodiment of the present application also provides a computer-readable storage medium configured to store a computer program.

In an embodiment, the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For brevity, I won't repeat them here.

In an embodiment, the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program causes the computer to execute each method implemented by the mobile terminal/terminal device in the embodiment of the present application. For the sake of brevity, the corresponding process will not be repeated here.

An embodiment of the present application also provides a computer program product, including computer program instructions.

In an embodiment, the computer program product can be applied to the network device in the embodiment of the application, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the application. For brevity, This will not be repeated here.

In one embodiment, the computer program product can be applied to the mobile terminal/terminal device in the embodiment of the present application, and the computer program instructions cause the computer to execute the corresponding implementation of the mobile terminal/terminal device in each method of the embodiment of the present application. For the sake of brevity, the process will not be repeated here.

The embodiment of the application also provides a computer program.

In an embodiment, the computer program can be applied to the network device in the embodiment of the present application. When the computer program runs on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, I will not repeat them here.

In one embodiment, the computer program can be applied to the mobile terminal/terminal device in the embodiment of the present application. When the computer program runs on the computer, the computer executes each method in the embodiment of the present application. For the sake of brevity, the corresponding process implemented by the device will not be repeated here.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the multiple examples described in the embodiments disclosed in this document can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application of the technical solution and design constraints. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and conciseness of the description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the unit is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical, or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or multiple units may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application essentially or part of the contribution to the existing technology or part of the technical solution can be embodied in the form of a software product, the computer software product is stored in a storage medium, including Several instructions are used to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

Claims

A signal transmission method, including:

Map the data service on the client side to the first type of frame;

The frame of the first type is mapped to the frame of the second type through the general mapping procedure GMP, wherein the mapping of the frame of the first type to the frame of the second type through the GMP mapping is based on a time slot For a unit, the overhead of the second type frame includes an adjustment control JC field, and the JC field is used to transmit the target parameter of the data service;

The target parameter of the data service is sent to a clock chip through the overhead of the second type of frame, where the target parameter is used by the clock chip to restore the client-side reference clock.
The method according to claim 1, wherein the calculation frequency of the GMP mapping is greater than or equal to a first threshold, and the container size selected by the GMP mapping is greater than or equal to a second threshold.
The method according to claim 1 or 2, wherein the number of time slots occupied by the first type frames obtained by mapping data services of different rates is different,

The JC fields corresponding to all the time slots occupied by the first type frame are used to transmit the size of the data container occupied by each time slot, wherein the size of the data container occupied by each time slot is k*Cn/ N, k are coefficients, Cn is the target parameter, and N is the number of time slots occupied by the first type frame; or,

The JC fields corresponding to all time slots occupied by the first type frame are used to transmit the data container size occupied by N time slots, where the data container size occupied by the N time slots is k*Cn, k is the coefficient, Cn is the target parameter, and N is the number of time slots occupied by the first type frame.
The method according to claim 3, wherein, in the process of mapping the frame of the first type to the frame of the second type through the GMP mapping, the method further comprises:

According to the first parameter, a sigma-delta calculation is performed on each time slot particle to generate a data filling envelope, wherein the value of the first parameter is rounded to k*Cn/N The obtained value, or the value of the first parameter, is a value obtained by rounding k*Cn.
The method according to any one of claims 1 to 4, wherein the payload part of the second type frame is divided into T_n_ts time slots, and through the JC field included in the overhead of the second type frame, every T_n_frame Two frames of the second type are used to transmit the target parameters of T_n_oh time slots, and the target parameters of T_n_ts time slots are transmitted through T_n_frame*(T_n_ts/T_n_oh) frames of the second type, wherein the update period of the JC field is T_n_frame* (T_n_ts/T_n_oh) second type frames.
The method according to claim 5, further comprising:

In an update period of the JC field, the number of time slot particles occupied by the first type frame is determined according to the ratio of the transmission rate of the first type frame to the second type frame.
The method according to claim 3 or 6, wherein the second type frame has D_ts_num time slots that can carry service data, and the method further comprises:

In the N time slots occupied by the first type frame, each time slot has T_n_frame*(T_n_ts/T_n_oh)*D_ts_num/T_n_ts time slot particles, and the number of time slot particles that can be filled by the first type frame for:

T_n_frame*(T_n_ts/T_n_oh)*D_ts_num/T_n_ts*N;

Multiply the ratio of the transmission rate of the first type frame to the second type frame by the number of time slot particles and divide by N to obtain the number of time slot particles occupied by the first type frame in the update period , And used as the first parameter of the data filling envelope in the GMP mapping.
The method according to claim 3 or 6, wherein the second type frame has D_ts_num time slots that can carry service data, and the method further comprises:

In the N time slots occupied by the first type frame, each time slot has T_n_frame*(T_n_ts/T_n_oh)*D_ts_num/T_n_ts time slot particles, and the number of time slot particles that can be filled by the first type frame for:

T_n_frame*(T_n_ts/T_n_oh)*D_ts_num/T_n_ts*N;

Multiply the ratio of the transmission rate of the first type frame to the second type frame by the number of time slot particles to obtain the number of time slot particles occupied by the first type frame in the update period, which is used as the total number of time slot particles. The data fills the first parameter of the envelope in the GMP mapping.
The method according to claim 7 or 8, wherein the filling envelope is calculated once for each time slot particle occupied by the first type frame, and the target time slot particle belongs to the first type frame occupied In the case of timeslots, the data filling envelope in the GMP mapping is calculated once.
A signal transmission device includes:

The first mapping unit is configured to map the data service on the client side into the first type of frame;

The second mapping unit is configured to map the first type frame to the second type frame through GMP mapping, wherein the first type frame is mapped to the second type frame through the GMP mapping It is performed on a time slot basis, and the overhead of the second type frame includes a JC field, and the JC field is used to transmit the target parameter of the data service;

The transmission unit is configured to send the target parameter of the data service to the clock chip through the overhead of the second type frame, wherein the target parameter is used by the clock chip to restore the client-side reference clock.
A computer-readable storage medium configured to store a computer program, wherein the computer program causes a computer to execute the method according to any one of claims 1 to 9.
A network device, comprising: a processor and a memory, wherein the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory, and execute any one of claims 1 to 9 The method described.