CN110661745A - Overhead transmission method, device, equipment and computer readable storage medium - Google Patents

Overhead transmission method, device, equipment and computer readable storage medium Download PDF

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Publication number
CN110661745A
CN110661745A CN201810686869.4A CN201810686869A CN110661745A CN 110661745 A CN110661745 A CN 110661745A CN 201810686869 A CN201810686869 A CN 201810686869A CN 110661745 A CN110661745 A CN 110661745A
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overhead
frame
data
request
transmission
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CN110661745B (en
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蒙万洲
李雯雯
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ZTE Corp
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ZTE Corp
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40Network security protocols
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/06Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]

Abstract

The text discloses an overhead transmission method, an overhead transmission device, overhead transmission equipment and a computer readable storage medium, which belong to the technical field of communication, and the method comprises the following steps: extracting overhead data and buffering the overhead data into an overhead frame, wherein the overhead frame comprises: channel number, row number, and overhead data; packaging the overhead frame into a custom overhead data frame; serial transmission of overhead data is carried out according to the type of the custom overhead data frame, channel number row numbers and other identifiers are added before overhead and are cached in sequence, and the custom packet is packaged to carry out serial transmission of OTN overhead, so that insertion and extraction of overhead across an FPGA are realized, the structure is simple, the portability is high, and pins of OTN devices are greatly saved.

Description

Overhead transmission method, device, equipment and computer readable storage medium
Technical Field
The present disclosure relates to the field of communications, and in particular, to an overhead transmission method, apparatus, device, and computer readable storage medium.
Background
In an Optical Transport Network (OTN), a powerful Network maintenance management function is implemented by overhead, and overhead processing plays an important role in the OTN, including: APS/PCC (automatic Protection Switching/Protection Communication Channel), GCC (General Communication Channel) and some reserved overhead are used to transmit the customized information related to the device or user. With the increasing speed and capacity of OTN devices, for large-capacity devices, resources of an FPGA (Field Programmable Gate Array) are increasingly strained, and overhead processing is relatively independent, and it is a common practice to implement overhead processing in one FPGA alone. If overhead information is transmitted in parallel, logic processing is more complex and occupies more hardware pins.
Disclosure of Invention
The invention aims to provide an overhead transmission method, an overhead transmission device, overhead transmission equipment and a computer readable storage medium, wherein identifiers such as channel number row numbers are added before overhead and are cached in sequence, and the identifiers are packaged into a custom packet to carry out serial transmission of OTN overhead, so that the cross-FPGA insertion and extraction of the overhead are realized, the structure is simple, the portability is high, and the OTN device pins are greatly saved.
The technical scheme adopted for solving the technical problems is as follows:
according to an aspect herein, there is provided an overhead transmission method, comprising:
extracting overhead data and buffering the overhead data into an overhead frame, wherein the overhead frame comprises: channel number, row number, and overhead data;
packaging the overhead frame into a custom overhead data frame;
and carrying out serial transmission of overhead data according to the type of the self-defined overhead data frame.
Optionally, before encapsulating the overhead frame into a custom overhead data frame, the method further includes:
and acquiring an overhead request and receiving an insertion data packet.
Optionally, the encapsulating the overhead frame into a custom overhead data frame includes:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
Optionally, the types of the custom overhead data frame include: a data frame, a request frame, a data request frame; correspondingly, the serial transmission of overhead data according to the type of the custom overhead data frame includes:
judging whether the type of the self-defined overhead data frame is a data frame, if so, extracting required overhead data according to the line number, and outputting a corresponding channel number, a request multiframe value and overhead data;
otherwise, the overhead request, the channel number and the request multiframe value are extracted and cached, the inserted data packet is subjected to framing operation, and the inserted data packet is packaged into an inserted overhead data frame for transmission.
According to another aspect herein, there is provided an overhead transmission apparatus comprising:
an extraction module, configured to extract overhead data and cache the overhead data as an overhead frame, where the overhead frame includes: channel number, row number, and overhead data;
the encapsulation module is used for encapsulating the overhead frame into a user-defined overhead data frame;
and the transmission module is used for carrying out serial transmission of the overhead data according to the type of the custom overhead data frame.
Optionally, the method further comprises:
and the inserting module is used for acquiring the overhead request and receiving the inserting data packet.
Optionally, the package module specifically includes:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
Optionally, the types of the custom overhead data frame include: a data frame, a request frame, a data request frame; accordingly, the transmission module comprises:
the judging unit is used for judging whether the type of the custom overhead data frame is a data frame;
the first transmission unit is used for extracting the required overhead data according to the line number and outputting the corresponding channel number, the request multiframe value and the overhead data when the type of the self-defined overhead data frame is a data frame;
and the second transmission unit is used for extracting and caching the overhead request, the channel number and the request multiframe value when the type of the self-defined overhead data frame is a request frame or a data request frame, performing framing operation on the inserted data packet, and packaging the inserted data packet into an inserted overhead data frame for transmission.
According to yet another aspect herein, there is provided an electronic device comprising a memory, a processor, and at least one application stored in the memory and configured to be executed by the processor, the application configured to perform the overhead transfer method described above.
According to yet another aspect herein, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the overhead transmission method described above.
An overhead transmission method, an overhead transmission device, overhead transmission equipment and a computer-readable storage medium in the embodiment of the invention are provided, and the method comprises the following steps: extracting overhead data and buffering the overhead data into an overhead frame, wherein the overhead frame comprises: channel number, row number, and overhead data; packaging the overhead frame into a custom overhead data frame; serial transmission of overhead data is carried out according to the type of the custom overhead data frame, channel number row numbers and other identifiers are added before overhead and are cached in sequence, and the custom packet is packaged to carry out serial transmission of OTN overhead, so that insertion and extraction of overhead across an FPGA are realized, the structure is simple, the portability is high, and pins of OTN devices are greatly saved.
Drawings
Fig. 1 is a flowchart of an overhead transmission method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of overhead data according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a custom overhead data frame according to an embodiment of the present invention;
fig. 4 is a flowchart of another overhead transmission method according to an embodiment of the present invention;
FIG. 5 is a flowchart of the method of step S30 in FIG. 1;
fig. 6 is a schematic structural diagram of an inserted overhead data frame according to an embodiment of the present invention;
fig. 7 is a block diagram illustrating an exemplary structure of an overhead transmission apparatus according to a second embodiment of the present invention;
fig. 8 is a block diagram illustrating an exemplary structure of another overhead transmission apparatus according to a second embodiment of the present invention;
fig. 9 is a block diagram illustrating an exemplary structure of the transmission module of fig. 7.
The objects, features, and advantages described herein will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer and more obvious, the present invention is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not restrictive.
Example one
As shown in fig. 1, in this embodiment, an overhead transmission method includes:
s10, extracting overhead data and buffering the overhead data into overhead frames, wherein the overhead frames comprise: channel number, row number, and overhead data;
s20, packaging the overhead frame into a self-defined overhead data frame;
and S30, carrying out serial transmission of overhead data according to the type of the self-defined overhead data frame.
In this embodiment, identifiers such as a channel number and a line number are added before overhead and cached in sequence, and the identifiers are encapsulated into a custom packet to perform serial transmission of the OTN overhead, so that insertion and extraction of the overhead across an FPGA are realized, the structure is simple, the portability is high, and pins of OTN devices are greatly saved.
In this embodiment, the overhead data is extracted from the overhead interface, and is written into the buffer memory according to the sequence of the channel number, the line number, and the overhead data, and is transmitted to the encapsulation unit together after waiting for enough frame data, where fig. 2 is a schematic structural diagram of each line of overhead data.
In this embodiment, fig. 3 is a schematic structural diagram of a custom overhead data frame, where a frame header portion includes bytes such as a packet type field, a request channel number, and a request multiframe, where the packet type indicates a type of the overhead frame, and there are three types of the data frame, the request frame, and the data request frame, a payload portion is an overhead to be transmitted, a length of the overhead data may be set according to a requirement, and finally, a check byte of 4 bytes is included.
As shown in fig. 4, in this embodiment, step S20 is preceded by:
s101, acquiring an overhead request and receiving an insertion data packet.
The insertion data packet is overhead data which is processed by the feedback end and then sent to the initiating end, there is a delay from sending an overhead request to receiving the insertion data packet, and in order to continuously insert the overhead into the service, a part of the overhead data needs to be cached. In order to avoid the occurrence of empty and full cache, a cache waterline and proper request interval control are designed.
In the present embodiment, step S20 includes:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
Specifically, according to the overhead request and the cache waterline (one frame of data information), the type of the overhead frame is determined, the jump of the state machine is started, the packaging process is started, if the overhead request is received, the request channel number and the multiframe value MFAS are latched, and meanwhile, a response signal is returned. The sending unit of the initiating end sends the custom overhead frame to the feedback end; the feedback end receives the self-defined overhead data frame of the initiating end, sends the self-defined overhead data frame to the deframing unit, analyzes the overhead information in the self-defined overhead data frame, and outputs an effective channel number, a line number and overhead data.
In this embodiment, the types of the custom overhead data frame include: a data frame, a request frame, a data request frame; accordingly, as shown in fig. 5, step S30 includes:
s31, judging whether the type of the self-defined overhead data frame is a data frame, if so, entering the step S32, extracting the required overhead data according to the line number, and outputting the corresponding channel number, the request multiframe value and the overhead data;
otherwise, step S33 is executed to extract and buffer the overhead request, the channel number and the request multi-frame value, and perform framing operation on the inserted data packet, and package the data packet into an inserted overhead data frame for transmission.
In this embodiment, since the overhead is transmitted in rows, only the first row can extract the multiframe value MFAS, the channel number is used as the write address in the first row using the RAM, the MFAS is stored in the RAM, and the channel number is used as the read address in the subsequent 2,3,4 rows to read the MFAS information from the RAM.
In this embodiment, step S33 specifically includes: extracting and caching the request indication, the request channel number and the request multiframe value, maintaining a state machine, and reading out the cached overhead request information when the framing unit is idle and the cache is not empty; selecting overhead bytes to be inserted according to the request channel number and the request multiframe, and outputting the overhead bytes to be inserted to a framing unit; starting a state machine to perform framing operation when the overhead insertion request is effective, and packaging the overhead to be inserted into an overhead data frame according to the format of the figure 6; wherein the frame header part comprises the frame length, as shown in fig. 6. The payload part comprises a request channel number, an overhead byte for requesting insertion, overhead enable and the like, and the length of the inserted overhead can be set according to requirements. The check byte is a 4 byte CRC check.
In this embodiment, step S33 is followed by: the sending unit sends the custom insertion overhead frame to an initiating end; the initiating end receives the insertion overhead frame of the feedback end and sends the frame to the decapsulating unit; decapsulating the inserted overhead frame to obtain overhead information, latching a channel number, storing the overhead information and the channel number into a cache, reading overhead data after caching a frame, and outputting the overhead data to an inserted cache control unit; buffering the insertion cost into the RAM corresponding to each path of cost according to the latched channel number, storing enough frame cost, and outputting the cost data with the channel number consistent with the cost insertion request channel number to a cost insertion unit after the MFAS values are equal; the overhead to be inserted is loaded into the OTN frame. Whether to insert is determined according to the overhead insertion enabling, and the enabling signal is configured by software.
Example two
As shown in fig. 7, in this embodiment, an overhead transmission apparatus includes:
an extracting module 10, configured to extract overhead data and buffer the overhead data into an overhead frame, where the overhead frame includes: channel number, row number, and overhead data;
an encapsulation module 20, configured to encapsulate the overhead frame into a custom overhead data frame;
and the transmission module 30 is configured to perform serial transmission of the overhead data according to the type of the custom overhead data frame.
In this embodiment, identifiers such as a channel number and a line number are added before overhead and cached in sequence, and the identifiers are encapsulated into a custom packet to perform serial transmission of the OTN overhead, so that insertion and extraction of the overhead across an FPGA are realized, the structure is simple, the portability is high, and pins of OTN devices are greatly saved.
In this embodiment, the overhead data is extracted from the overhead interface, and is written into the buffer memory according to the sequence of the channel number, the line number, and the overhead data, and is transmitted to the encapsulation unit together after waiting for enough frame data, where fig. 2 is a schematic structural diagram of each line of overhead data.
In this embodiment, fig. 3 is a structural diagram of a custom overhead data frame, where a frame header portion includes bytes such as a packet type field, a request channel number, and a request multiframe, where the packet type indicates a type of the overhead frame, and there are three types of the data frame, the request frame, and the data request frame, a payload portion is an overhead to be transmitted, a length of the overhead data may be set according to a requirement, and finally a check byte of 4 bytes is included.
As shown in fig. 8, in this embodiment, the overhead transmission apparatus further includes:
and the inserting module 40 is used for acquiring the overhead request and receiving the inserting data packet.
The insertion data packet is overhead data which is processed by the feedback end and then sent to the initiating end, there is a delay from sending an overhead request to receiving the insertion data packet, and in order to continuously insert the overhead into the service, a part of the overhead data needs to be cached. In order to avoid the occurrence of empty and full cache, a cache waterline and proper request interval control are designed.
In this embodiment, the package module specifically includes:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
Specifically, according to the overhead request and the cache waterline (one frame of data information), the type of the overhead frame is determined, the jump of the state machine is started, the packaging process is started, if the overhead request is received, the request channel number and the multiframe value MFAS are latched, and meanwhile, a response signal is returned. The sending unit of the initiating end sends the custom overhead frame to the feedback end; the feedback end receives the self-defined overhead data frame of the initiating end, sends the self-defined overhead data frame to the deframing unit, analyzes the overhead information in the self-defined overhead data frame, and outputs an effective channel number, a line number and overhead data.
In this embodiment, the types of the custom overhead data frame include: a data frame, a request frame, a data request frame; accordingly, as shown in fig. 9, the transmission module includes:
a judging unit 31, configured to judge whether the type of the custom overhead data frame is a data frame;
a first transmission unit 32, configured to, when the type of the custom overhead data frame is a data frame, extract required overhead data according to a row number, and output a corresponding channel number, a requested multiframe value, and overhead data;
and a second transmission unit 33, configured to, when the type of the custom overhead data frame is a request frame or a data request frame, extract and buffer the overhead request, the channel number, and the request multi-frame value, perform framing operation on the inserted data packet, and encapsulate the extracted data packet into an inserted overhead data frame for transmission.
In this embodiment, since the overhead is transmitted in rows, only the first row can extract the multiframe value MFAS, the channel number is used as the write address in the first row using the RAM, the MFAS is stored in the RAM, and the channel number is used as the read address in the subsequent 2,3,4 rows to read the MFAS information from the RAM.
In this embodiment, the workflow of the second transmission unit: extracting and caching the request indication, the request channel number and the request multiframe value, maintaining a state machine, and reading out the cached overhead request information when the framing unit is idle and the cache is not empty; selecting overhead bytes to be inserted according to the request channel number and the request multiframe, and outputting the overhead bytes to be inserted to a framing unit; starting a state machine to perform framing operation when the overhead insertion request is effective, and packaging the overhead to be inserted into an overhead data frame according to the format of the figure 6; wherein the frame header part comprises the frame length, as shown in fig. 6. The payload part comprises a request channel number, an overhead byte for requesting insertion, overhead enable and the like, and the length of the inserted overhead can be set according to requirements. The check byte is a 4 byte CRC check.
In this embodiment, the workflow of the second transmission unit further includes: the sending unit sends the custom insertion overhead frame to an initiating end; the initiating end receives the insertion overhead frame of the feedback end and sends the frame to the decapsulating unit; decapsulating the inserted overhead frame to obtain overhead information, latching a channel number, storing the overhead information and the channel number into a cache, reading overhead data after caching a frame, and outputting the overhead data to an inserted cache control unit; buffering the insertion cost into the RAM corresponding to each path of cost according to the latched channel number, storing enough frame cost, and outputting the cost data with the channel number consistent with the cost insertion request channel number to a cost insertion unit after the MFAS values are equal; the overhead to be inserted is loaded into the OTN frame. Whether to insert is determined according to the overhead insertion enabling, and the enabling signal is configured by software.
EXAMPLE III
In this embodiment, an electronic device includes a memory, a processor, and at least one application stored in the memory and configured to be executed by the processor, the application configured to perform the overhead transfer method of embodiment one.
Example four
Embodiments of the present invention provide a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the method embodiments as described in any of the above overhead transmission method embodiments.
It should be noted that the above device, apparatus, and computer-readable storage medium embodiments and method embodiments belong to the same concept, and specific implementation processes thereof are described in detail in the method embodiments, and technical features in the method embodiments are all correspondingly applicable in the device embodiments, which is not described herein again.
An overhead transmission method, an overhead transmission device, overhead transmission equipment and a computer-readable storage medium in the embodiment of the invention are provided, and the method comprises the following steps: extracting overhead data and buffering the overhead data into an overhead frame, wherein the overhead frame comprises: channel number, row number, and overhead data; packaging the overhead frame into a custom overhead data frame; the serial transmission of overhead data is carried out according to the type of the custom overhead data frame, the marks such as channel number row numbers are added before the overhead and are cached in sequence, and the custom packet is packaged to carry out the serial transmission of the OTN overhead, so that the cross-FPGA insertion and extraction of the overhead are realized, the structure is simple, the portability is high, and the OTN device pins are greatly saved.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, and are not to be construed as limiting the scope of the invention. Any modifications, equivalents and improvements which may occur to those skilled in the art without departing from the scope and spirit of the present invention are intended to be within the scope of the claims.

Claims (10)

1. An overhead transmission method, comprising:
extracting overhead data and buffering the overhead data into an overhead frame, wherein the overhead frame comprises: channel number, row number, and overhead data;
packaging the overhead frame into a custom overhead data frame;
and carrying out serial transmission of overhead data according to the type of the self-defined overhead data frame.
2. The overhead transmission method according to claim 1, wherein encapsulating the overhead frame as a custom overhead data frame further comprises:
and acquiring an overhead request and receiving an insertion data packet.
3. The overhead transmission method of claim 2, wherein said encapsulating the overhead frame into a custom overhead data frame comprises:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
4. The overhead transmission method of claim 3, wherein the type of the custom overhead data frame comprises: a data frame, a request frame, a data request frame; correspondingly, the serial transmission of overhead data according to the type of the custom overhead data frame includes:
judging whether the type of the self-defined overhead data frame is a data frame, if so, extracting required overhead data according to the line number, and outputting a corresponding channel number, a request multiframe value and overhead data;
otherwise, the overhead request, the channel number and the request multiframe value are extracted and cached, the inserted data packet is subjected to framing operation, and the inserted data packet is packaged into an inserted overhead data frame for transmission.
5. An overhead transmission apparatus, comprising:
an extraction module, configured to extract overhead data and cache the overhead data as an overhead frame, where the overhead frame includes: channel number, row number, and overhead data;
the encapsulation module is used for encapsulating the overhead frame into a user-defined overhead data frame;
and the transmission module is used for carrying out serial transmission of the overhead data according to the type of the custom overhead data frame.
6. The overhead transmission device of claim 5, further comprising:
and the inserting module is used for acquiring the overhead request and receiving the inserting data packet.
7. The overhead transmission device according to claim 6, wherein the encapsulation module specifically includes:
obtaining a cache waterline from the overhead frame;
and packaging the overhead frame into a user-defined overhead data frame according to the overhead request and the cache waterline.
8. The overhead transport device of claim 7, wherein the types of the custom overhead data frames comprise: a data frame, a request frame, a data request frame; accordingly, the transmission module comprises:
the judging unit is used for judging whether the type of the custom overhead data frame is a data frame;
the first transmission unit is used for extracting the required overhead data according to the line number and outputting the corresponding channel number, the request multiframe value and the overhead data when the type of the self-defined overhead data frame is a data frame;
and the second transmission unit is used for extracting and caching the overhead request, the channel number and the request multiframe value when the type of the self-defined overhead data frame is a request frame or a data request frame, performing framing operation on the inserted data packet, and packaging the inserted data packet into an inserted overhead data frame for transmission.
9. An electronic device comprising a memory, a processor, and at least one application stored in the memory and configured to be executed by the processor, wherein the application is configured to perform the overhead transport method of any of claims 1-4.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the overhead transmission method according to any one of claims 1 to 4.
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王尧: "一种基于FPGA实现的OTN协议解析方法", 《第三十二届中国(天津)2018IT、网络、信息技术、电子、仪器仪表创新学术会议论文集》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114051023A (en) * 2021-11-11 2022-02-15 烽火通信科技股份有限公司 Method, device and equipment for processing frame overhead of optical service unit and readable storage medium
CN114051023B (en) * 2021-11-11 2023-05-23 烽火通信科技股份有限公司 Method, device, equipment and readable storage medium for processing frame overhead of optical service unit
CN116582412A (en) * 2023-07-06 2023-08-11 北京晟芯网络科技有限公司 OTN cross-chip sending and receiving overhead and request method, device and medium
CN116582412B (en) * 2023-07-06 2023-11-24 北京晟芯网络科技有限公司 OTN cross-chip sending and receiving overhead and request method, device and medium

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