WO2017005139A1

WO2017005139A1 - Synchronization method and device for receiving and transmitting ends in optical transmission system, and storage medium

Info

Publication number: WO2017005139A1
Application number: PCT/CN2016/088129
Authority: WO
Inventors: 杨宁
Original assignee: 深圳市中兴微电子技术有限公司
Priority date: 2015-07-03
Filing date: 2016-07-01
Publication date: 2017-01-12
Also published as: CN106330422A

Abstract

Provided in an embodiment of the invention is a synchronization method for receiving and transmitting ends in an optical transmission system. The method comprises: placing information for training a receiving end link in inter-control information required to be transmitted; encoding the inter-control information containing the information for training the receiving end link to obtain an encoded sequence, and modulating the sequence; and using the modulated sequence to complete a four-way handshake between the receiving and transmitting ends. Further provided in the embodiment of the invention are a synchronization device for the receiving and transmitting ends in the optical transmission system and computer storage medium.

Description

Synchronization method, device and storage medium between transceivers in optical transmission system

Technical field

The present invention relates to optical transmission technologies in the field of communications, and in particular, to a method, device and computer storage medium for synchronizing between transceivers in an optical transmission system.

Background technique

In the field of optical transmission technology, the current data transmission mainly adopts the wavelength division system. However, in the process of data transmission using the wavelength division system, there are problems such as chromatic dispersion, polarization film dispersion, and strong filtering effect, and the existing processing. The method is a digital signal processing method, also called 100G digital signal processing (DSP, Digital Signal Processing). The WDM system adopts 100G DSP processing technology. After power-on, the chip directly transmits data frames. The equalization and synchronization of the receiving end gradually converge on the user data. The data will be inserted at equal intervals to speed up the synchronization and equalization speed. The user data sent at the beginning is not wasted due to the synchronization equalization; and even if there is a pilot, in order to maximize the user's throughput, the pilot density is usually much smaller than the data density, thus making synchronization and The speed of equalization is relatively slow, which also causes a waste of user data at the beginning.

Summary of the invention

In view of the above, in order to solve the problems existing in the prior art, the embodiments of the present invention provide a method, a device, and a computer storage medium for synchronizing between transceivers in an optical transmission system, so as to avoid that user data sent at the beginning cannot be accurately received. .

The technical solution of the embodiment of the present invention is implemented as follows:

An embodiment of the present invention provides a method for synchronizing between transceivers in an optical transmission system, where the synchronization method includes:

Placing information for training the receiving end link into the interactive control information to be sent;

Encoding and modulating the interactive control information including the link information of the training receiver to obtain a coded modulated sequence;

The four-way handshake between the transceiver ends is completed by using the coded modulated sequence.

In the above solution, the information used to train the receiving end link includes:

Request data frame, response data frame, correct response message data frame.

In the above solution, the information for training the receiving end link is placed in the interaction control information to be sent, including:

The request data frame, the response data frame, and the correct response message data frame for training the receiving end link are respectively placed in the interactive control information to be sent.

In the above solution, the four-way handshake between the transceiver ends includes:

The sending end sends the request status to the receiving end; the receiving end returns a sequence of the response data frame to the sending end;

After receiving the sequence of the response data frame from the receiving end, the transmitting end sends a correct response message state to the receiving end; the receiving end returns a request data frame sequence to the transmitting end;

After receiving the sequence of request data frames from the receiving end, the transmitting end sends a response status to the receiving end; the receiving end returns a sequence of response data frames or a sequence of correct response message data frames to the transmitting end;

After receiving the correct response message data frame sequence from the receiving end, the transmitting end sends the data frame state to the receiving end, and sends the data frame state to the receiving end.

In the above solution, the number of appointments is: the number of correct response message data frames that are set in the interaction control information and received by the sender.

The embodiment of the invention provides a synchronization device between the transceiver terminals in the optical transmission system, and the synchronization device includes:

The information placing unit is configured to: put information for training the receiving end link into the interactive control information to be sent, and generate information for training the receiving end link;

a code modulation unit configured to encode and modulate the interaction control information including the link information of the training receiver to obtain a coded modulated sequence;

a main control unit configured to complete the four-way handshake between the transceiver ends by using the modulated sequence;

a sending and receiving unit, configured to send the coded modulated sequence, and receive the information sent by the opposite end;

And a storage unit configured to store information of the training receiver link and the modulated sequence.

In the above solution, the information insertion unit is further configured to: generate a request data frame, a response data frame, and a correct response message data frame of the training receiver link.

In the above solution, the information placing unit is further configured to: respectively insert, in the interaction control information to be sent, a request data frame, a response data frame, and a correct response message data frame for training the receiving end link. .

In the foregoing solution, the main control unit is further configured to:

In the above solution, the synchronization device further includes:

a counting unit configured to count a sequence of received correct response message data frames;

a setting unit configured to: in the interaction control information, set a sending end to receive the receiving end The number of correct response message data frames.

An embodiment of the present invention provides a computer storage medium, where the computer storage medium stores a computer program for performing a synchronization method between the transceivers in the optical transmission system described above.

The method, device and computer storage medium for synchronizing between the transceivers in the optical transmission system provided by the embodiment of the present invention complete the link in the process of four handshakes by using the interactive control information of the link information of the training receiver. The link between the two peer nodes is quickly established; and the saved time for establishing the link can be used to send data, which increases the throughput of the user data. Meanwhile, the embodiment of the present invention intelligently adopts a four-way handshake mechanism. It is convenient for the receiving end to know when to receive the data frame, so that the stability of the whole system can be improved; furthermore, the interactive control information including the link information of the training receiving end can make the receivers at both ends in a good state, and can guarantee the first A data frame is successfully decoded, which simplifies some processes in which the receiving end judges whether the received data is a data frame, and simplifies the scheduling of the entire receiver, directly or indirectly to increase user throughput.

DRAWINGS

FIG. 1 is a schematic flowchart of an implementation method of a synchronization method between transceivers in an optical transmission system according to an embodiment of the present disclosure;

2 is a schematic diagram of a swim lane of a four-way handshake in a method for synchronizing between transceivers in an optical transmission system according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a synchronization device between transceivers in an optical transmission system according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a synchronization device between transceivers in another optical transmission system according to an embodiment of the present invention.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The synchronization process of data transmission between receivers at both ends in a wavelength division system using 100G DSP is introduced as an example.

FIG. 1 is a schematic flowchart of a method for synchronizing a transmitting and receiving end in an optical transmission system according to an embodiment of the present disclosure. As shown in FIG. 1 , a method for synchronizing transceivers in an optical transmission system according to this embodiment includes:

Step 101: The receiver at the transmitting end puts information for training the link of the receiving end into the interactive control information to be sent;

Here, the information for training the receiving end link includes the following information: a request data frame, a response data frame, and an Acknowledgement (Ack) data frame.

The placing the information for training the receiving end link in the interaction control information to be sent includes: inserting, in the interaction control information to be sent, a request data frame for training the receiving end link, Respond to the data frame and correctly answer the message data frame.

Here, the location of the request data frame, the response data frame, and the correct response message data frame that are specifically used for training the receiving end link is not limited, and may be any three fixed positions. The order in which data frames are placed is not limited; the specific placement location is as long as the sender and receiver are pre-negotiated.

Step 102: The receiver at the transmitting end encodes and modulates the interaction control information including the link information of the training receiver to obtain a coded modulated sequence.

Step 103: The receiver of the transmitting end and the receiver of the receiving end complete the four-way handshake between the transmitting and receiving ends by using the coded modulated sequence.

As an embodiment, FIG. 2 is a schematic diagram of a four-way handshake in a synchronization method between transceivers in an optical transmission system according to an embodiment of the present invention. The specific four-way handshake is performed between a receiver at the transmitting end and a receiver at the receiving end. . As shown in FIG. 2, the information for training the receiving end link includes: a request data frame, a response data frame, and a correct response message data frame, the transceiver end The four-way handshake process includes:

Step 201a: The sending end sends a request status to the receiving end.

Step 201b: The receiving end returns a sequence of response data frames to the transmitting end.

Step 202a: After receiving the sequence of the response data frame from the receiving end, the transmitting end sends a correct response message state to the receiving end.

Step 202b: The receiving end returns a sequence of request data frames to the transmitting end.

Step 203a: After receiving the sequence of request data frames from the receiving end, the transmitting end sends a response status to the receiving end.

Step 203b: The receiving end returns a sequence of response data frames or a sequence of correct response message data frames to the transmitting end.

Steps 204a to 204b: after receiving the number of the correct response message data frame sequence from the receiving end, the transmitting end sends the data frame state to the receiving end; and in the state of transmitting the data frame, the data is always sent to the receiving end;

Here, if the agreed number is not reached, steps 202a, 202b, 203a and 203b are repeatedly performed;

The number of the agreement is the number of correct response message data frames that are set in the interaction control information and received by the sender.

In the process shown in FIG. 2, step 201a and step 201b are first handshakes, steps 202a and 202b are second handshakes, steps 203a and 203b are third handshakes, and steps 204a and 204b are fourth. Second handshake.

The synchronization method between the transceivers in the optical transmission system provided by the embodiment of the present invention completes the link in the four-way handshake process through the interaction control information with the link information of the training receiver, which helps the two nodes of the peer The link is quickly established; the time for establishing the link can be used to send data and increase the throughput of the user data. The embodiment of the present invention can improve the stability of the entire system and simplify the scheduling of the entire receiver, directly or indirectly to facilitate the increase. Large user throughput.

In order to achieve the above method, the embodiment of the present invention further provides a synchronization device between the transceiver terminals in the optical transmission system. In this embodiment, the synchronization device is placed in the receiver. As shown in FIG. 3, the synchronization device includes :

The information placing unit 301 is configured to: put information for training the receiving end link into the interaction control information to be sent;

In this embodiment, the information placing unit 301 is placed in a receiver at the transmitting end;

The code modulation unit 302 is configured to encode and modulate the interaction control information including the link information of the training receiver to obtain a coded and modulated sequence;

In this embodiment, the code modulation unit 302 is respectively placed in the receiver of the transmitting end and the receiver of the receiving end;

In addition, in order to decode and modulate the sequence sent by the opposite end, it is also necessary to provide a decoding modulation unit, and the decoding modulation unit can use the decoding modulation function of the receiver itself;

That is to say, the code modulation unit 302 and the decoding modulation unit need to be placed in the receiver of the transceiver.

The main control unit 303 is configured to complete the four-way handshake between the transceiver ends by using the coded modulated sequence;

In this embodiment, the main control unit 303 needs to be placed in both the receiver of the transmitting end and the receiver of the receiving end;

The sending and receiving unit 304 is configured to send the coded modulated sequence, and receive information sent by the opposite end;

In this embodiment, the transmitting and receiving unit 304 needs to be placed in both the receiver of the transmitting end and the receiver of the receiving end; when placed at the receiver of the transmitting end, the coded modulated sequence needs to be sent and received by the opposite end. Information; when placed at the receiver of the receiving end, configured to receive information sent by the opposite end;

The storage unit 305 is configured to store information of the training receiving end link and the coded modulated sequence Column

In this embodiment, the storage unit 305 is placed in a receiver at the transmitting end.

As an embodiment, the information placing unit 301 generates information for training the link of the receiving end, and puts information for training the link of the receiving end into the interactive control information to be sent, the training receiving end chain The information of the path is stored in the storage unit 305; then, the code modulation unit 302 encodes and modulates the interactive control information including the link information of the training receiver to obtain a coded modulated sequence, and the storage unit 305 decodes the coded sequence. The main control unit 303 completes the four-way handshake between the transceivers by using the coded modulated sequence, and the sending and receiving unit 304 transmits the message sent by the peer receiver to the main control unit 303, and sends the main control unit 303. The control information is sent to the peer receiver.

The embodiment of the present invention provides a preferred implementation manner. The information insertion unit 301 is specifically configured to generate a request data frame, a response data frame, and a correct response message data frame for training the receiving end link. A request data frame, a response data frame, and a correct response message data frame for training the receiving end link are respectively placed in the interactive control information to be sent.

Here, for the main control unit 303, for the convenience of description, the main control unit of the transmitting end is set to 303-1, and the main control unit of the receiving end is set to 303-2, and the specific configuration is:

The transmitting end main control unit 303-1 sends a request status to the receiving end main control unit 303-2;

The receiving end main control unit 303-2 returns a sequence of response data frames to the transmitting end main control unit 303-1;

After receiving the sequence of the response data frame from the receiving end main control unit 303-2, the transmitting end main control unit 303-1 sends a correct response message status to the receiving end main control unit 303-2;

The receiving end main control unit 303-2 returns a request data frame sequence to the transmitting end main control unit 303-1;

After receiving the sequence of request data frames from the receiving end main control unit 303-2, the transmitting end main control unit 303-1 sends a response status to the receiving end main control unit 303-2;

The receiving end main control unit 303-2 returns a sequence of response data frames to the transmitting end main control unit 303-1 or Correct response message data frame sequence;

After receiving the agreed number of the correct response message data frame sequence from the receiving end main control unit 303-2, the transmitting end main control unit 303-1 transmits the data frame state to the receiving end main control unit 303-2; In the state of the data frame, the data is always sent to the receiving end main control unit 303-2;

As shown in FIG. 4, the synchronization device between the transceivers in the optical transmission system further includes:

The counting unit 307 is configured to count the sequence of the received correct response message data frames;

Here, the counting unit 307 is placed in the receiver of the transmitting end to perform statistics on the sequence of correct response message data frames sent by the receiving end;

The setting unit 306 is configured to set, in the interaction control information, the number of correct response message data frames that the transmitting end receives at the receiving end.

Specifically, as shown in FIG. 4, the synchronization device between the transceiver end of the optical transmission system provided by this embodiment, the information insertion unit 301, the generated request data frame, the response data frame of the training receiver link, The correct response message data frame is placed in a fixed position of the interactive control information to be sent, and the code modulation unit 302 encodes and modulates the interactive control information including the link information of the training receiver to obtain a coded modulated sequence; Then, the transmitting and receiving unit 304 transmits the coded and modulated sequence to the receiver of the opposite end; after that, the receiving end main control unit 303 performs the four-way handshake by using the coded modulation sequence, and sends in the process of performing the four-way handshake. The counting unit 307 of the terminal counts the sequence of correct response message data frames received by the transmitting and receiving unit 304. When the number reaches the agreed number set by the setting unit 306 in the transmitting end, the main control unit 303 of the transmitting end is notified to start transmitting data.

In addition, in an actual application, the information placing unit 301, the code modulating unit 302, the main control unit 303, the transmitting and receiving unit 304, the storage unit 305, the setting unit 306, and the counting unit 307 may all be configured by a central processing unit located in the terminal. (Central Processing Unit, CPU), Micro Processor Unit (MPU), Digital Signal Processor (DSP), or Field Programmable Gate Array (Field Programmable Gate Array, FPGA) and other implementations.

The synchronization device between the transceivers in the optical transmission system provided by the embodiment of the present invention completes the link in the process of four handshakes by using the interactive control information with the link information of the training receiver, which helps the two peers. Quickly establish links between nodes, and save time for establishing links, which can be used to send data and increase the throughput of user data. At the same time, the smart four-way handshake mechanism is convenient for the receiving end to synchronize when to know the data frame. This improves the stability of the entire system. Furthermore, the interactive control information including the link information of the training receiver makes the receivers at both ends in good condition, which can ensure the decoding of the first data frame successfully, and simplify the judgment of the receiving end. Whether the received data is a process of data frames, streamlining the scheduling of the entire receiver, directly or indirectly to increase user throughput.

An embodiment of the present invention provides a computer storage medium, where the computer storage medium stores a computer program, and the computer program is used in a method for synchronizing between transceivers in the optical transmission system described in the foregoing embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, such as: multiple units or components may be combined, or Can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, or direct coupling, or communication connection of the components shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms. of.

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

In addition, each functional unit in each embodiment of the present invention may be integrated in one processing order. In the meta element, each unit may be separately used as a unit, or two or more units may be integrated into one unit; the integrated unit may be implemented in the form of hardware or a hardware plus software functional unit. Formal realization.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing storage device includes the following steps: The foregoing storage medium includes: a removable storage device, a read-only memory (ROM), a magnetic disk, or an optical disk, and the like, which can store program codes.

Alternatively, the above-described integrated unit of the present invention may be stored in a computer readable storage medium if it is implemented in the form of a software function module and sold or used as a standalone product. Based on such understanding, the technical solution of the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product stored in a storage medium, including a plurality of instructions. A computer device (which may be a personal computer, server, or network device, etc.) is caused to perform all or part of the methods described in various embodiments of the present invention. The foregoing storage medium includes various media that can store program codes, such as a mobile storage device, a ROM, a magnetic disk, or an optical disk.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Industrial applicability

In the embodiment of the present invention, information for training the link of the receiving end is placed into the interactive control information to be sent; the interactive control information including the link information of the training receiving end is encoded to obtain a coded sequence, and the modulation station is obtained. Using the modulated sequence to complete the four-way handshake between the transceivers; thus, by avoiding that the user data sent at the beginning cannot be accurately received Achieve increased user throughput.

Claims

A method for synchronizing between transceivers in an optical transmission system, the synchronization method comprising:

Placing information for training the receiving end link into the interactive control information to be sent;

Encoding and modulating the interactive control information including the link information of the training receiver to obtain a coded modulated sequence;

The four-way handshake between the transceiver ends is completed by using the coded modulated sequence.
The synchronization method according to claim 1, wherein the information for training the receiving end link comprises:

Request data frame, response data frame, correct response message data frame.
The synchronization method according to claim 2, wherein the inserting information for training the receiving end link into the interactive control information to be transmitted includes:

The request data frame, the response data frame, and the correct response message data frame for training the receiving end link are respectively placed in the interactive control information to be sent.
The synchronization method according to claim 3, wherein the four-way handshake between the transceivers comprises:

The sending end sends the request status to the receiving end; the receiving end returns a sequence of the response data frame to the sending end;

After receiving the sequence of the response data frame from the receiving end, the transmitting end sends a correct response message state to the receiving end; the receiving end returns a request data frame sequence to the transmitting end;

After receiving the sequence of request data frames from the receiving end, the transmitting end sends a response status to the receiving end; the receiving end returns a sequence of response data frames or a sequence of correct response message data frames to the transmitting end;

After receiving the correct response message data frame sequence from the receiving end, the transmitting end sends the data frame state to the receiving end, and sends the data frame state to the receiving end.
The synchronization method according to claim 4, wherein the number of appointments is: set to In the interaction control information, the sender receives the number of correct response message data frames at the receiving end.
A synchronization device between transceivers in an optical transmission system, the synchronization device comprising:

The information placing unit is configured to: put information for training the receiving end link into the interactive control information to be sent, and generate information for training the receiving end link;

a code modulation unit configured to encode and modulate the interaction control information including the link information of the training receiver to obtain a coded modulated sequence;

a main control unit configured to complete the four-way handshake between the transceiver ends by using the modulated sequence;

a sending and receiving unit, configured to send the coded modulated sequence, and receive the information sent by the opposite end;

And a storage unit configured to store information of the training receiver link and the modulated sequence.
The synchronization device according to claim 6, wherein the information placing unit is configured to generate a request data frame, a response data frame, and a correct response message data frame for training the receiving end link.
The synchronization device according to claim 7, wherein the information placing unit is configured to: respectively insert a request data frame and a response data for training the receiving end link in the interactive control information to be transmitted Frame, correct response message data frame.
The synchronization device according to claim 8, wherein the main control unit is configured to:

The sending end sends the request status to the receiving end; the receiving end returns a sequence of the response data frame to the sending end;

After receiving the sequence of the response data frame from the receiving end, the transmitting end sends a correct response message state to the receiving end; the receiving end returns a request data frame sequence to the transmitting end;

After receiving the sequence of request data frames from the receiving end, the transmitting end sends a response status to the receiving end; the receiving end returns a sequence of response data frames or a sequence of correct response message data frames to the transmitting end;

The sender receives the correct response message from the receiving end, and the number of data frame sequences reaches the agreed number. After that, the data frame state is sent to the receiving end; and in the state in which the data frame is transmitted, the data is always transmitted to the receiving end.
The synchronization device of claim 9, wherein the synchronization device further comprises:

a counting unit configured to count a sequence of received correct response message data frames;

And a setting unit configured to set, in the interaction control information, a number of correct response message data frames that the transmitting end receives at the receiving end.
A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 1 to 5.