WO2022111323A1

WO2022111323A1 - Signal frame processing method and related device

Info

Publication number: WO2022111323A1
Application number: PCT/CN2021/130638
Authority: WO
Inventors: 葛金亮
Original assignee: 华为技术有限公司
Priority date: 2020-11-27
Filing date: 2021-11-15
Publication date: 2022-06-02
Also published as: CN114567410A

Abstract

A signal frame processing method and a related device. When switching of a transmission channel is needed, another transmission channel between a receiving device and a sending device may be created first, and the receiving device and the sending device of the same service may transmit service data by means of two transmission channels. After receiving service data from different transmission channels, the receiving device may sort the service data according to an original service order. Furthermore, when switching of the transmission channel is needed, after one of the transmission channels is disconnected, one transmission channel is still reserved between the receiving device and the sending device. Therefore, the service data may further continue to be transmitted by means of the transmission channel that is not disconnected, so that service interruption is avoided and user experience is improved.

Description

A kind of signal frame processing method and related equipment

This application claims the priority of the Chinese patent application filed on November 27, 2020 with the application number 202011364406.X and titled "A Signal Frame Processing Method and Related Equipment", the entire contents of which are by reference Incorporated in this application.

technical field

The embodiments of the present application relate to the field of optical communications, and in particular, to a signal frame processing method and related devices.

Background technique

Optical transport network (OTN, optical transport network) is an extremely important hard-pipe transmission technology, which has the characteristics of high bandwidth, large capacity, and high flexibility. In the OTN technology, service data can be mapped to a flexible optical service unit (OSUflex, flexible optical service unit) with a smaller granularity, and then transmitted through an optical service unit (OSU, optical service unit) pipeline.

As shown in Figure 1, the service data of each service is respectively transmitted to an optical data unit (ODU, optical data unit) through an OSU pipeline for bearing. When the service 4 that needs to occupy a bandwidth of 600M needs to be connected to the ODU0, because the remaining bandwidth of the ODU0-2 is 400M, the ODU0-2 cannot directly bear the service 4.

As shown in Figure 2, the service 2 that occupies 400M bandwidth can be disconnected and switched to ODU0-1 with the remaining bandwidth of 400M for carrying. After the handover, the remaining bandwidth of ODU0-2 is 800M. At this time, ODU0-2 can carry service 4 that occupies 600M bandwidth. However, during the service switching process, the user experience is affected because the service will be disconnected.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a signal frame processing method and related equipment, which are used to avoid service interruption and affect user experience when switching service transmission channels.

In a first aspect, an embodiment of the present application provides a method for processing a signal frame. The receiving device and the sending device of the same service transmit signal frames through a transmission channel. When the transmission channel needs to be switched, the following steps are performed: First, another transmission channel between the receiving device and the sending device is established. Further, signal frames can be transmitted between the receiving device and the transmitting device through two transmission channels. In the embodiment of the present application, the two transmission channels are respectively named as "first transmission channel" and "second transmission channel" to distinguish. It should be noted that the first transmission channel and the second transmission channel mentioned in this application refer to two different transmission channels of the same service. Specifically, the first transmission channel may refer to a working transmission channel, or may be a newly created transmission channel. Similarly, the second transmission channel mentioned in this application may refer to a newly-built transmission channel, or may be a working transmission channel.

The receiving device receives a first signal frame from the sending device through the first transmission channel, where the first signal frame includes a first data block and a first check block. And, the receiving device receives the second signal frame from the transmitting device through the second transmission channel, and the second signal frame includes the second data block. The first data block and the second data block are used to carry service data. There is a mapping relationship between the first check block and the second signal frame.

After receiving the first signal frame and the second signal frame from different transmission channels, the receiving device can complete the connection between the first signal frame and the second signal frame through the mapping relationship between the first check block and the second signal frame , and determine the arrangement order between the first signal frame and the second signal frame. At this time, outputting the first check block is meaningless for service data. Therefore, the receiving device can arrange the first data block and the second data block according to the above-mentioned arrangement order to obtain the target signal frame. Since the order in which the sending device sends the first signal frame and the second signal frame is based on the order of the service data, the order of the first data block and the second data block in the target signal frame is the same as that of the first signal frame. The same as the transmission sequence of the second signal frame.

In the existing optical network, only one transmission channel can transmit service data between the receiving device and the sending device of the same service. In the embodiment of the present application, when the transmission channel needs to be switched, another transmission channel between the receiving device and the sending device may be created first, and then the receiving device and the sending device of the same service can transmit services through the two transmission channels data. After receiving the service data from different transmission channels, the receiving device can sort the service data according to the original service order. Furthermore, when the transmission channel needs to be switched, after disconnecting one of the transmission channels, there is still a transmission channel reserved between the receiving device and the sending device. Therefore, the service data can also continue to be transmitted through the undisconnected transmission channel, which avoids service interruption and improves user experience.

Based on the first aspect, in an optional implementation manner, the second signal frame may further include a second check block. The first check block in the first signal frame and the second check block in the second signal frame have a first mapping relationship. The receiving device can complete the mutual search between the first check block and the second check block through the first mapping relationship, and sort the first data block and the second data block.

In this embodiment, the first check block and the second check block do not carry service data, so less bandwidth resources are required for transmitting the first check block and the second check block. The receiving device completes the sorting of the first data block and the second data block through the first check block and the second check block, which can reduce the occupation of network resources.

Based on the first aspect, in an optional implementation manner, the first check block carries the same service data as the second data block, that is, the payload of the first check block is equal to the payload of the second data block, and at the same time , a second mapping relationship exists between the first check block and the second data block. The receiving device may determine an arrangement order between the first signal frame and the second signal frame through the second mapping relationship, and sort the first data block and the second data block according to the arrangement order.

In this embodiment, since the first check block carries the same service data as the second data block, when the second data block is lost during processing, the service data carried in the first check block It can still be used for the output of business data, which improves the reliability of the solution.

Based on the first aspect, in an optional implementation manner, a first mapping relationship and a second mapping relationship may exist simultaneously between the first signal frame and the second signal frame. That is, the receiving device can first search for the first check block corresponding to the second check block according to the first mapping relationship, and then search for the second data block corresponding to the first check block according to the second mapping relationship to complete the first data block. with the ordering of the second data block.

In this embodiment, the first mapping relationship and the second mapping relationship may exist between the signal frames at the same time, which provides more implementation manners for searching the first signal frame and the second signal frame.

Based on the first aspect, in an optional implementation manner, when the first transmission channel or the second transmission channel is disconnected, since there is still a transmission channel between the receiving device and the sending device, the receiving device and the sending device still have one transmission channel. Between devices, the subsequent third signal frame can still be transmitted through the undisconnected transmission channel. The third signal frame is used to represent the signal frame transmitted after the first signal frame and the second signal frame.

In this embodiment, after one of the transmission channels is disconnected, the service data may continue to be transmitted through the undisconnected transmission channel, thereby avoiding service interruption and improving user experience.

Based on the first aspect, in an optional implementation manner, the first mapping relationship may be: the payload of the first check block is the same as the payload of the second check block. In another optional implementation manner, the first mapping relationship may be: the payload of the specific area of the first parity block is the same as the payload of the specific area of the second parity block. In another optional implementation manner, the first mapping relationship may be: the value of the valid value field in the first check block is equal to the cyclic redundancy check (CRC, cyclic redundancy check) of the second check block Checksum.

Based on the first aspect, in an optional implementation manner, the second mapping relationship may be: the value of the valid value range in the first check block is equal to the checksum of the CRC algorithm of the second data block.

In a second aspect, an embodiment of the present application provides a method for processing a signal frame. The receiving device and the sending device of the same service transmit signal frames through a transmission channel. When the transmission channel needs to be switched, the following steps are performed: First, another transmission channel between the receiving device and the sending device is established. Further, signal frames can be transmitted between the receiving device and the transmitting device through two transmission channels.

The sending device sends a first signal frame to the receiving device through the first transmission channel, where the first signal frame includes a first data block and a first check block. And, the receiving device receives the second signal frame from the transmitting device through the second transmission channel, and the second signal frame includes the second data block. The first data block and the second data block are used to carry service data. There is a mapping relationship between the first check block and the second signal frame. The mapping relationship can be used by the receiving device to sort the first data block and the second data block to obtain the target signal frame. Since the order in which the sending device sends the first signal frame and the second signal frame is based on the order of service data, the arrangement order of the first data block and the second data block is equal to the order of the first signal frame and the second signal frame. send order.

Based on the second aspect, in an optional implementation manner, the second signal frame may further include a second check block. The first check block in the first signal frame and the second check block in the second signal frame have a first mapping relationship. The receiving device can complete the mutual search between the first check block and the second check block through the first mapping relationship, and sort the first data block and the second data block.

Based on the second aspect, in an optional implementation manner, the first check block carries the same service data as the second data block, that is, the payload of the first check block is equal to the payload of the second data block, and at the same time , a second mapping relationship exists between the first check block and the second data block. The receiving device may determine an arrangement order between the first signal frame and the second signal frame through the second mapping relationship, and sort the first data block and the second data block according to the arrangement order.

Based on the second aspect, in an optional implementation manner, when the first transmission channel or the second transmission channel is disconnected, since there is still a transmission channel between the receiving device and the sending device, the receiving device and the sending device still have one transmission channel. Between devices, the subsequent third signal frame can still be transmitted through the undisconnected transmission channel. The third signal frame is used to represent the signal frame transmitted after the first signal frame and the second signal frame.

Based on the second aspect, in this embodiment, the mapping relationship between the first check block and the second signal frame is provided. For details, please refer to the content of the first aspect, which will not be repeated here.

In a third aspect, an embodiment of the present application provides a receiving device. The receiving device includes: a receiving unit and a processing unit. The receiving unit is configured to receive a first signal frame from a sending device through a first transmission channel, where the first signal frame includes a first data block and a first check block. The receiving unit is further configured to receive a second signal frame from the sending device through the second transmission channel, where the second signal frame includes a second data block, and the first check block and the second signal frame have a mapping relationship. a processing unit, configured to sort the first data block and the second data block according to the mapping relationship to obtain a target signal frame, and the arrangement order of the first data block and the second data block is equal to the the sending sequence of the first signal frame and the second signal frame.

Based on the third aspect, in an optional implementation manner, the second signal frame further includes a second check block, and a mapping relationship between the first check block and the second signal frame includes: the first check block A check block and the second check block have a first mapping relationship.

Based on the third aspect, in an optional implementation manner, the payload of the first check block is equal to the payload of the second data block, and the first check block and the second signal frame exist The mapping relationship includes: a second mapping relationship exists between the first check block and the second data block.

Based on the third aspect, in an optional implementation manner, the processing unit is specifically configured to determine the first check block corresponding to the second check block according to the first mapping relationship; according to the second mapping The relationship determines the second data block corresponding to the first check block; and sorts the first data block and the second data block.

Based on the third aspect, in an optional implementation manner, the receiving unit is specifically configured to receive data from the sending device through the undisconnected transmission channel when the first transmission channel or the second transmission channel is disconnected The third signal frame is a signal frame transmitted after the first signal frame and the second signal frame.

Based on the third aspect, in this embodiment, the mapping relationship between the first check block and the second signal frame is provided. For details, please refer to the content of the first aspect, which will not be repeated here.

In a fourth aspect, an embodiment of the present application provides a sending device. The sending device includes a first sending unit and a second sending unit. The first sending unit is configured to send a first signal frame to the receiving device through a first transmission channel, where the first signal frame includes a first data block and a first check block. A second sending unit, configured to send a second signal frame to the receiving device through the second transmission channel, where the second signal frame includes a second data block. There is a mapping relationship between the first check block and the second signal frame, and the mapping relationship is used by the receiving device to sort the first data block and the second data block to obtain a target signal frame, The arrangement order of the first data block and the second data block is equal to the transmission order of the first signal frame and the second signal frame.

Based on the fourth aspect, in an optional implementation manner, the second signal frame further includes a second check block, and a mapping relationship between the first check block and the second signal frame includes: the first check block A check block and the second check block have a first mapping relationship.

Based on the fourth aspect, in an optional implementation manner, the payload of the first check block is equal to the payload of the second data block, and the first check block and the second signal frame exist The mapping relationship includes: a second mapping relationship exists between the first check block and the second data block.

Based on the fourth aspect, in an optional implementation manner, the sending unit is further configured to, when the first transmission channel or the second transmission channel is disconnected, send an The receiving device sends a third signal frame, where the third signal frame is a signal frame transmitted after the first signal frame and the second signal frame.

Based on the fourth aspect, in this embodiment, the mapping relationship between the first check block and the second signal frame is provided. For details, please refer to the content of the first aspect, which will not be repeated here.

In a fifth aspect, an embodiment of the present invention provides a chip. The chip includes a processor and a transceiving interface, the transceiving interface and the processor are connected to each other through a line, and the transceiving interface is used to perform the steps related to the transceiving of the signal frame shown in the first aspect above. The processor is configured to execute the processing-related steps shown in the first aspect above.

In a sixth aspect, an embodiment of the present invention provides a chip. The chip includes a processor and a transceiving interface, the transceiving interface and the processor are connected to each other through a line, and the transceiving interface is used to perform the steps related to the transceiving of the signal frame shown in the first aspect above. The processor is configured to execute the processing-related steps shown in the first aspect above.

In a seventh aspect, an embodiment of the present application provides an optical network device. Optical transmission equipment includes: chips and optical transceivers. Wherein, the chip and the optical transceiver are connected to each other through a line, and the chip is used for executing the signal frame processing method shown in the first aspect or any embodiment of the first aspect.

In an eighth aspect, an embodiment of the present application provides an optical network device. Optical transmission equipment includes: chips and optical transceivers. Wherein, the chip and the optical transceiver are connected to each other through a line, and the chip is used for executing the signal frame processing method shown in the second aspect or any embodiment of the second aspect.

In a ninth aspect, an embodiment of the present application provides an optical network system. The optical network system includes the receiving device of the third aspect and the sending device of the fourth aspect. The receiving device in the optical network system may perform the first aspect and any one of the possible implementation methods of the first aspect; the sending device in the optical network system may perform any one of the second aspect and the second aspect. method of implementation.

Description of drawings

Fig. 1 is an application scenario diagram in the existing OTN network;

2 is a schematic diagram of transmission channel switching in an existing OTN network;

FIG. 3 is a schematic structural diagram of an optical transmission system applied in an embodiment of the present application;

Fig. 4 is a kind of hardware structure schematic diagram of OTN equipment;

5 is a schematic structural diagram of a possible signal frame in the application;

6 is a schematic structural diagram of a data block and a check block in the application;

FIG. 7 is an application scenario diagram of a transmission channel switching provided by the present application;

FIG. 8 is a schematic diagram of an embodiment of a method for processing a signal frame in the present application;

FIG. 9 is a schematic diagram of the mapping relationship between the first check block and the second check block in this application;

10 is a schematic diagram of a sorting of the first data block and the second data block in the embodiment of the present application;

11 is another schematic diagram of sorting the first data block and the second data block in an embodiment of the present application;

12 is another schematic diagram of sorting the first data block and the second data block in an embodiment of the present application;

13 is a schematic diagram of still another sorting of the first data block and the second data block in the embodiment of the present application;

FIG. 14 is a schematic structural diagram of an embodiment of a receiving device in an embodiment of the application;

FIG. 15 is an exemplary structural diagram of an embodiment of a sending device in an embodiment of the application;

FIG. 16 is a schematic structural diagram of a possible optical transmission device in an embodiment of the present application;

FIG. 17 is a schematic structural diagram of a chip provided by an embodiment of the present application.

Detailed ways

Embodiments of the present application provide a signal frame processing method and related equipment, which are used to avoid service interruption when a transmission channel needs to be switched.

The embodiments of the present application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Those of ordinary skill in the art know that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

The terms "first", "second" and the like in the description and claims of the present application and the drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, and this is only a distinguishing manner used when describing objects with the same attributes in the embodiments of the present application. Furthermore, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or elements is not necessarily limited to those steps or elements expressly listed, Rather, other steps or units not expressly listed or inherent to the process, method, product or apparatus may be included.

The embodiments of the present application are applicable to an optical network, for example, an optical transport network (OTN, optical transport network) or a flexible Ethernet (FlexE, flex Ethernet). In order to facilitate understanding of the technical solutions of the present invention, in the embodiments of the present application, OTN is used as an example for description. The optical transport network is usually formed by connecting multiple devices through optical fibers, and can be formed into different topology types such as linear, ring, or mesh according to specific needs.

FIG. 3 is a schematic diagram of a network architecture applicable to this embodiment of the present application. The OTN shown in FIG. 3 includes two OTN networks (respectively OTN network 1 and OTN network 2). Each OTN network includes a certain number of OTN devices (indicated by N in FIG. 3 ). The links between devices in the OTN network are intra-domain links, and the links between devices between OTN networks are inter-domain links. According to actual needs, an OTN device may have one or more functions. Generally speaking, OTN devices are divided into optical layer devices, electrical layer devices and optoelectronic hybrid devices. An optical layer device refers to a device capable of processing optical layer signals, such as an optical amplifier (OA, optical amplifier). The electrical layer device refers to a device capable of processing electrical layer signals, for example, a device capable of processing ODU signals. An optoelectronic hybrid device refers to a device capable of processing optical layer signals and electrical layer signals. It should be noted that, according to specific integration needs, one OTN device can integrate a variety of different functions. The technical solutions provided in this application are applicable to OTN devices of different shapes and degrees of integration.

FIG. 4 is a schematic diagram of a hardware structure of an OTN device. Specifically, the OTN device includes a power supply 401, a fan 402, an auxiliary board 403, and may also include a tributary board 404, a circuit board 405, a cross board 406, an optical layer processing board (not shown in the figure), and a system control board and communication board 407. It should be noted that, according to specific needs, an OTN device may contain different types and numbers of boards. For example, a network device that is a core node may not have tributary board 404 . A network device that is an edge node may have multiple tributary boards 404 . Among them, the power source 401 is used to supply power to the device, and may include main and backup power sources. Fan 402 is used to dissipate heat from the device. The auxiliary board 403 is used to provide auxiliary functions such as external alarms or access to an external clock. The tributary board 404, the cross board 406 and the circuit board 405 are mainly used for processing electrical layer signals of the optical network (eg, the first signal frame and the second signal frame in this application). Among them, the tributary board 404 is used to realize the reception and transmission of various customer services, such as packet services, Ethernet services, and fronthaul services. Further, the tributary board 404 can be divided into client-side optical modules and processors. The client-side optical module may be an optical transceiver for receiving and/or transmitting client signals. The processor is used to implement the mapping and demapping processing of the client signal to the electrical layer signal. The cross board 406 is used to realize the exchange of electrical layer signals, and complete the exchange of one or more types of electrical layer signals. The circuit board 405 mainly implements the processing of electrical layer signals on the circuit side. Specifically, the circuit board 405 can be divided into a line-side optical module and a processor. The line-side optical module may be a line-side optical transceiver for receiving and/or transmitting electrical layer signals. The processor is used to implement multiplexing and demultiplexing, or mapping and de-mapping processing of electrical layer signals on the line side. The system control and communication board 407 is used to implement system control and communication. Specifically, information can be collected from different boards through the backplane, or control instructions can be sent to the corresponding board. It should be noted that, unless otherwise specified, there may be one or more specific components (eg, processors), which are not limited in this application. It should also be noted that the embodiments of the present application do not impose any restrictions on the types of boards included in the device, and the specific functional design and quantity of the boards. It should be noted that the signal frame processing method of the present application may be specifically implemented on the circuit board 405, or the tributary circuit board 404 and the circuit board 405 may be integrated to implement the signal frame processing method of the present application.

FIG. 5 is a schematic structural diagram of a possible signal frame in the present application. As shown in FIG. 5 , a signal frame (for example, an optical payload unit k (optical payload unit k, OPUk) frame 501 ) is divided into a plurality of payload blocks (PB, payload block) 5011 . The payload block 5011 includes an overhead area and a payload area, and the payload area is used to carry service data, which is then carried in the OPUk 501 through a channel identifier (tributary port number, TPN).

As shown in FIG. 6 , the check block 601 provided in the embodiment of the present application is a special payload block. The check block 601 itself may not carry service data (it may also carry service data, for details, please refer to the description of the subsequent embodiments). A special identifier 6011 exists in the overhead area in the check block 601, which is used to distinguish the check block 601 from the payload block carrying service data. In order to facilitate the distinction and description, in this embodiment of the present application, a payload block carrying service data is referred to as a data block, and a payload block containing a special identifier is referred to as a check block. When the signal frame received by the receiving device includes the check block 601, the receiving device will not directly output the signal frame. The receiving device needs to search for other signal frames that have a mapping relationship with the signal frame first. Specifically, the check block in the signal frame may have this mapping relationship. In this embodiment of the present application, the receiving device may complete the mutual search between signal frames through the above-mentioned mapping relationship. The data blocks 602 carrying the service data in the signal frame are sorted to obtain the target signal frame arranged according to the original service data sequence.

In the existing OTN network, the receiving device and the sending device of the same service transmit service data through a transmission channel. After receiving the business data, the receiving device can directly output it, so there is no need to design the search and sorting of the business data. FIG. 7 is an application scenario diagram of the present application. As shown in FIG. 7 , in the embodiment of the present application, when the transmission channel needs to be switched, another transmission channel between the sending device and the receiving device may be established first, and then the sending device and the receiving device of the same service can pass through the two transmission channels. A transmission channel is established to establish a connection. The sending device sends signal frames to the receiving device through two transmission channels. After receiving the signal frames from two different transmission channels, the receiving device can splicing different signal frames according to the order of service data through the mapping relationship between the signal frames to obtain the target signal frame. When switching of transmission channels is required, one of the transmission channels is disconnected, and service data can still be transmitted through the other transmission channel, thereby avoiding service interruption.

Specifically, after receiving the first signal frame and the second signal frame, the receiving device may search for each other through the first check block in the first signal frame and the second check block in the second signal frame to complete the data block. sorting between. It is also possible to perform mutual search between the check block in the first signal frame and the data block in the second signal frame to complete the sorting between the data blocks. The above two embodiments will be described separately below.

1. The first check block and the second check block search each other to complete the sorting of the data blocks.

FIG. 8 is a schematic diagram of an embodiment of a method for processing a signal frame in the present application. In this example, the processing method of the signal frame includes the following steps.

801. Establish a second transmission channel between the receiving device and the sending device;

In this application, taking OTN as an example, the corresponding transmission channel is an OSU pipe. When a service transmits service data through an OSU pipe, when the transmission channel needs to be switched, another new OSU pipe with the same bandwidth as the original service can be created to connect the service sending device and receiving device.

It should be noted that the first transmission channel and the second transmission channel described in this application are two different transmission channels of the same service. Specifically, the first transmission channel or the second transmission channel may refer to a working transmission channel, or may be a newly created transmission channel. For ease of understanding, the embodiments of the present application are described by taking the currently working transmission channel as the first transmission channel as an example. At the same time, the newly established transmission channel is used as the second transmission channel.

802. The sending device sends the first signal frame to the receiving device through the first transmission channel;

In this application, the first signal frame sent by the sending device may include a first data block and a first check block. Among them, the data block is used to carry service data. The check block is a special data block, and the check block itself may not carry service data. There is a special identifier in the overhead area in the check block, which is used to distinguish the check block from the data block carrying service data.

It should be noted that the present application does not limit the number of the first data blocks. In practical applications, the first data block may refer to one data block, or may be a collective term for multiple data blocks included in the first signal frame. In order to facilitate subsequent descriptions, the present application uses the first data block as a general term for the No. 1 data block and No. 2 data block for description. Similarly, the present application also does not limit the number of second data blocks. For the convenience of subsequent descriptions, this application uses the second data block as a general term for the No. 3 data block and the No. 4 data block for description.

803. The sending device sends a second signal frame to the receiving device through the second transmission channel;

In this embodiment, the second signal frame may include a second data block and a second check block. To facilitate subsequent descriptions, in this embodiment and subsequent embodiments, the first check block is named C code, and the second check block is named S code. With reference to the description of step 802, for a specific interaction scenario between the sending device and the receiving device of the present application, reference may be made to FIG. 10 or FIG. 11 .

Specifically, in order to ensure the accuracy of the service data, the order in which the sending device sends the first signal frame and the second signal frame is sent according to the original order of the service data. Meanwhile, in order to facilitate sorting of data blocks according to the mapping relationship of the check blocks, in the first signal frame, the C code can be sent after the No. 2 data block and the No. 1 data block. That is, in the first signal frame at this time, the positional relationship between the check block and the data block may be (C, 2, 1). In the second signal frame, the S code can be sent before the No. 4 data block and the No. 3 data block, that is, in the second signal frame, the positional relationship between the check block and the data block can be (4, 3, S ).

Further, the above-mentioned first check block has a mapping relationship with the second check block in the second signal frame. Specifically, after the receiving device receives the first check block and the second check block, the receiving device can search for each other between the first check block and the second check block through the mapping relationship.

FIG. 9 is a schematic diagram of a partial mapping relationship between check blocks provided by an embodiment of the present application. As shown in Figure 9, the present application provides the following mapping relationships between check blocks.

A: The payload of C code is the same as that of S code;

B: The payload of the specific area of the C code is the same as the payload of the specific area of the S code;

C: The value of the effective value field (Value field) of the C code is the cyclic redundancy check (CRC, cyclic redundancy check) checksum of the S code. The specific CRC algorithm method is not limited in this application.

D: The Value area of the S code carries the secret key, and the value of the Value area of the C code is the value calculated by using the secret key in the S code combined with the encryption algorithm. The specific encryption algorithm method is not limited in this application.

E: The value of the Value field of the C code is the same as the value of the Value field of the next data block of the S code.

F: The value of the Value area of the C code is the CRC checksum of a data block following the S code. The specific CRC algorithm method is not limited in this application.

G: The value area of the S code carries the secret key, and the value of the value area of the C code is the value calculated by using the secret key in the S code combined with the encryption algorithm. The encrypted original data is the value of a data block after the S code. The specific encryption The algorithm method is not limited in this application.

It should be noted that the above mapping relationship is only an example. In practical applications, other mapping relationships may also be used. Its function is to enable the receiving device to search for the corresponding check block through the mapping relationship, thereby splicing the signal frame.

804. The receiving device sorts the first data block and the second data block to obtain a target signal frame;

Since there is a mapping relationship between the C code in the first signal frame and the S code in the second signal frame, when the receiving device receives the first signal frame and the second signal frame, it can map the first signal frame according to the mapping relationship. frame and the second signal frame to search. The first data block and the second data block are sorted according to the initial service data sequence to obtain the target signal frame.

It should be noted that, because in the embodiment of the present application, the receiving device can implement a two-way search between check blocks based on the mapping relationship. That is, the C code can be searched through the S code, and the S code can also be searched through the C code. For ease of description, in this embodiment and subsequent embodiments, a one-way search manner of searching for a C code by using an S code is used as an example for description.

Specifically, although the sending device sends the first signal frame and the second signal frame according to the initial sequence of the service data. However, in practical applications, because the two transmission channels often have different time delays, the receiving device will receive different timings of the first signal frame and the second signal frame. Generally, there are two situations. The following descriptions are given in conjunction with the accompanying drawings:

A: As shown in Figure 10, when the delay of the first transmission channel is greater than that of the second transmission channel, the receiving device will first receive the second signal frame from the second transmission channel, including the No. 3 data block and No. 4 data block and size S. After the receiving device receives the S code, it will start to search for the corresponding C code. However, at this time, the C code has not yet arrived due to the large delay of the first transmission channel. After the receiving device receives the No. 1 data block, the No. 2 data block and the C code from the first transmission channel, the receiving device can find the C code corresponding to the S code through the mapping relationship.

Since the No. 1 data block, No. 2 data block and C code belong to the first signal frame (C, 2, 1), and No. 3 data block, No. 4 data block and S code belong to the second signal frame (4, 3 , S). After the S code searches the C code, the receiving device can determine that the first signal frame (C, 2, 1) and the second signal frame (4, 3, S) belong to the data of the same service. At this time, the receiving device aligns the first signal frame and the second signal frame according to the C code and the S code, and then sorts them to obtain (4, 3, S, C, 2, 1). Meanwhile, in this embodiment, the function of the check block is to assist the first data block and the second data block to complete sorting, and the check block does not carry service data. Therefore, the C code and S code output by the receiving device are meaningless, that is, in the target signal frame, the existence of the check block is not required, and the target signal frame only includes the data block (4, 3, 2, 1).

In this application, since the target signal frame obtained by the receiving device sorting the first data block and the second data block includes complete and correctly ordered service data, the receiving device can output the target signal frame.

B: As shown in Figure 11, when the delay of the second transmission channel is greater than that of the first transmission channel, the receiving device will first receive the first signal frame from the first transmission channel, including the No. 1 data block and No. 2 data block and C code. Since the present application takes the one-way search method of searching for the C code from the S code as an example, after the receiving device first receives the C code, it still needs to wait for the S code to be received. After the receiving device receives the No. 3 data block, the No. 4 data block and the S code from the second transmission channel, the receiving device can use the S code to find the corresponding C code through the mapping relationship. For a specific way of sorting the first data block and the second data block, reference may be made to the description of the scenario A in step 804, which will not be repeated here.

Considering the problem of the delay gap between the first transmission channel and the second transmission channel in practical applications, in the solution of the present application, an appropriate buffer can be set in the receiving device to solve the impact of the delay.

805. Disconnect the first transmission channel;

After the receiving device obtains the target signal frame, it indicates that the switching of service data has been completed. Between the sending device and the receiving device, subsequent service data can already be transmitted through the second transmission channel. Therefore, the original first transmission channel can be disconnected.

806. Between the receiving device and the sending device, transmit other signal frames through the second transmission channel;

At this time, the original first transmission channel is cut off, and the newly created second transmission channel can still carry subsequent service data, so there will be no interruption of service data.

In this embodiment, when the original transmission channel needs to be switched, a new transmission channel may be created first, and the first signal frame and the second signal frame are respectively transmitted through the two transmission channels. The first signal frame includes a first check block, and the second signal frame includes a second check block. After receiving the signal frame from the two transmission channels, the receiving device sorts the first data block and the second data block according to the mapping relationship between the first check block and the second check block to obtain the target signal frame. Since both transmission channels can carry service data between the receiving device and the sending device at this time, after the original first transmission channel is disconnected, subsequent service data can still continue to be transmitted through the second transmission channel, avoiding the need for Business data outages.

2. The first check block and the second data block search each other to complete the sorting between the data blocks.

The processing flow provided in this embodiment is similar to the embodiment corresponding to FIG. 8 . The following describes another signal frame processing method provided by this embodiment based on FIG. 8 . In this example, the processing method of the signal frame includes the following steps.

901. Establish a second transmission channel between the receiving device and the sending device;

902. The sending device sends the first signal frame to the receiving device through the first transmission channel;

903. The sending device sends a second signal frame to the receiving device through the second transmission channel;

Steps 901 to 903 in this embodiment are similar to the foregoing steps 801 to 803, and details are not described here. It should be noted that, in this embodiment, in addition to the mapping relationship between the first check block and the second check block, the first check block in the first signal frame and the second check block in the second signal frame There is also a mapping relationship between data blocks. For the mapping relationship between the check block and the data block, specific reference may be made to the contents described in subsections A to G in step 803 . Meanwhile, the first check block needs to include the same service data as the second data block. That is, the data block and check block in the first signal frame are (C ₄ , C ₃ , 2, 1), and the data block and check block in the second signal frame are (4, 3, S, S). The C ₄ code is the check code of the No. 4 data block, the payload of the C ₄ code is equal to the payload of the No. 4 data block; the C ₃ code is the check code of the No. 3 data block, and the payload of the C ₃ code is equal to 3 The payload of the numbered data block. For a specific interaction scenario between the sending device and the receiving device in this embodiment, reference may be made to FIG. 12 or FIG. 13 .

Likewise, the receiving device can implement a two-way search between the check block and the data block based on the above-mentioned mapping relationship. That is, the data blocks No. 4 and 3 can be searched through the C ₄ code and the C ₃ code, and the C ₄ code and the C ₃ code can also be searched through the No. 4 and No. 3 data blocks. For the convenience of description, in this embodiment and subsequent embodiments, the unidirectional search manner of searching for the No. 4 and No. 3 data blocks by using the C ₄ code and the C ₃ code is used as an example for description.

904. The receiving device sorts the first data block and the second data block to obtain a target signal frame;

Step 904 is similar to step 804. In practical applications, because the two transmission channels often have different time delays, the receiving device may receive different timings of the first signal frame and the second signal frame. Generally, there are two situations. The following descriptions are given in conjunction with the accompanying drawings:

A: As shown in Figure 12, when the delay of the first transmission channel is greater than that of the second transmission channel, the receiving device will first receive the second signal frame from the second transmission channel, including the No. 3 data block and No. 4 data block and two S sizes. Taking the one-way search method of searching for data blocks No. 4 and No. 3 through C ₄ code and C ₃ code as an example, after receiving the No. 4 and No. 3 data blocks, the receiving device needs to start the search for the corresponding C through two S codes. ₄ yards and C ₃ yards. But at this time, due to the large delay of the first transmission channel, the C ₄ code and the C ₃ code have not yet arrived. After the receiving device receives the No. 1 data block, No. 2 data block C ₄ code and C ₃ code from the first transmission channel, the receiving device can find the C ₄ code and C ₃ code corresponding to the S code through the mapping relationship .

Since the No. 1 data block, No. 2 data block, C ₄ code and C ₃ code belong to the first signal frame (C ₄ , C ₃ , 2, 1), the No. 3 data block, No. 4 data block and two S The codes all belong to the second signal frame (4, 3, S, S). After the S code searches the C code, the receiving device can determine that the first signal frame (C ₄ , C ₃ , 2, 1) and the second signal frame (4, 3, S, S) belong to the same service data. Since the _C4 code, the C3 code and the No.4 data block and the _No.3 data block have a mapping relationship, at this time, the receiving device aligns the corresponding No.4 data block and _No.3 data block according to the _C4 code and the C3 code, and obtains ( _4,3 , _C4 , C3, 2,1). Meanwhile, in this embodiment, the function of the check block is to assist the first data block and the second data block to complete the sorting. Therefore, the receiving device does not need to output the C ₄ code and the C ₃ code, that is, the target signal frame does not need the existence of the check block, and the target signal frame only includes the data block (4, 3, 2, 1).

B: As shown in Figure 13, when the delay of the second transmission channel is greater than that of the first transmission channel, the receiving device will first receive the first signal frame from the first transmission channel, including the No. 1 data block and No. 2 data block , C ₄ and C ₃ . After receiving the C ₄ code and the C ₃ code first, the receiving device can directly start to search for the corresponding No. 4 data block and No. 3 data block. However, at this time, due to the large delay of the second transmission channel, the No. 4 data block and the No. 3 data block have not yet arrived. After the receiving device receives the No. 4 data block, No. 3 data block and two S codes from the second transmission channel, the receiving device can find the No. 4 data block and the No. 4 data block corresponding to the C ₄ code and the C ₃ code through the mapping relationship. Data block No. 3, and complete the sorting, get (4, 3, C ₄ , C ₃ , 2, 1). Similarly, the receiving device does not need to output the check code, so the target signal frame only includes data blocks (4, 3, 2, 1).

It should be noted that, in subsection B of step 904 of this example, in the case that the receiving device receives the first signal frame first, the second data block can be directly searched through the first check block, and sorted, In this case, the check block in the second signal frame does not need to be used.

905. Disconnect the first transmission channel;

906. Between the receiving device and the sending device, transmit other signal frames through the second transmission channel;

Steps 905 and 906 in this embodiment are similar to the foregoing steps 805 and 806, and details are not described here.

In this embodiment, the first check block in the first signal frame includes service data of the second data block in the second signal frame. Therefore, when the second data block in the second signal frame occurs during the implementation of this example, When the block is lost, it can be replaced by the first check block, and the first check block is output as service data, which improves the reliability of the solution.

FIG. 14 is a receiving device provided by an embodiment of the present application. The receiving device may be the receiving device described in any of the above-mentioned FIG. 8 , FIG. 10 to FIG. 13 . The receiving device includes: a receiving unit 1401 and a processing unit 1402 . The receiving unit 1401 is configured to receive a first signal frame from a sending device through a first transmission channel, where the first signal frame includes a first check block and a first data block carrying service data. The receiving unit 1401 may also receive a second signal frame from the sending device through the second transmission channel, where the second signal frame includes a second data block. At the same time, there may be a mapping relationship between the first check block and the second signal frame. For the specific implementation of the function of the receiving unit 1401, reference may be made to steps 802 and 803 shown in FIG. 8, or steps 902 and 903, and details are not repeated here.

The processing unit 1402 is configured to sort the first data block and the second data block according to the above-mentioned mapping relationship to obtain a target signal frame. The order in which the sending device sends the first signal frame and the second signal frame is the same as the order of the service data. Therefore, in the obtained target signal frame, the arrangement order of the first data block and the second data block should also be equal to the first data block. The transmission order of the signal frame and the second signal frame. For a specific implementation manner of the function of the processing unit 1402, reference may be made to step 804 or step 904 shown in FIG. 8, and details are not repeated here.

In this embodiment, for the mapping relationship between the first check block and the second signal frame, reference may be made to the related descriptions of steps 802 to 803 and steps 902 to 903 shown in FIG. 8 , and details are not repeated here.

Optionally, the processing unit 1402 may first search for the first check block corresponding to the second check block according to the first mapping relationship. Then, according to the second mapping relationship, a second data block corresponding to the first check block is found, and the first data block and the second data block are sorted. For a specific implementation manner, reference may be made to step 904, which will not be repeated here.

Optionally, after the first transmission channel or the second transmission channel is disconnected, at least one transmission channel still remains between the receiving device and the sending device. Therefore, the receiving unit 1401 can still receive the third signal frame from the sending device through the undisconnected transmission channel. The third signal frame is a signal frame transmitted after the first signal frame and the second signal frame. For a specific implementation manner, reference may be made to the relevant description of step 805 or step 905 in this embodiment of the present application, and details are not repeated here.

In this embodiment, the receiving device may perform the operations performed by the receiving device in any of the foregoing embodiments shown in FIG. 8 , and details are not repeated here.

FIG. 15 is a sending device provided by an embodiment of the present application. The sending device may be the sending device described in any of the above-mentioned FIG. 8 and FIG. 10 to FIG. 13 . The sending device includes: a first sending unit 1501 and a second sending unit 1502 . The first sending unit 1501 is configured to send the first signal frame to the receiving device through the first transmission channel. The first signal frame includes a first check block and a first data block carrying service data. The second sending unit 1502 is configured to send a second signal frame to the receiving device through the second transmission channel, where the second signal frame includes a second data block. Meanwhile, there may be a mapping relationship between the first check block and the second signal frame. The mapping relationship is used by the receiving device to sort the first data block and the second data block to obtain the target signal frame. The sequence in which the sending device sends the first signal frame and the second signal frame is the same as the sequence of the service data. Therefore, in the obtained target signal frame, the arrangement order of the first data block and the second data block should also be equal to the transmission order of the first signal frame and the second signal frame. For a specific implementation manner, reference may be made to steps 802 and 803 shown in FIG. 8 , or steps 902 and 903, and details are not repeated here.

Optionally, after the first transmission channel or the second transmission channel is disconnected, at least one transmission channel still remains between the receiving device and the sending device. Therefore, the sending device can still send the third signal frame to the receiving device through the undisconnected transmission channel. The third signal frame refers to a signal frame transmitted after the first signal frame and the second signal frame. For a specific implementation manner, please refer to the relevant description of step 805 or step 905, which will not be repeated here.

In this embodiment, the sending device may perform the operations performed by the sending device in any of the foregoing embodiments shown in FIG. 8 , and details are not described herein again.

FIG. 16 is a schematic structural diagram of a possible optical transmission device. The optical transmission device includes a chip 1601 and an optical transceiver 1602 . Optionally, the optical transmission device may further include a memory (not shown in the figure). The chip 1601, the optical transceiver 1602 and the memory are connected to each other by wires. Among them, the memory is used to store program instructions and data. It should be noted that the optical transmission device may be the receiving device described in FIG. 14 or the sending device described in FIG. 15 .

In practical applications, the chip 1601 and the optical transceiver 1602 may be specifically located in the tributary board 404 or the circuit board 405 shown in FIG. 4 , and the optical transceiver 1602 is used to perform the transceiving operation of the signal frame in the steps shown in FIG. 8 . The chip 1601 is configured to perform other operations in the steps shown in FIG. 8 above except for signal frame transmission and reception.

FIG. 17 is a schematic structural diagram of a chip provided by an embodiment of the present application. The chip integrates a processor 1701 and one or more communication interfaces 1702 for realizing the functions of the above-mentioned chip 1601 . When a memory is integrated in the chip (not shown in the figure), the chip may perform the method steps of any one or more of the foregoing embodiments. When the memory is not integrated in the chip, it can be connected with the external memory through the interface. The chip implements the actions performed by the optical transmission device in the above embodiment according to the program codes stored in the external memory.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not implement. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of 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 components displayed as units may or may not be physical units, that is, may be located in one place, or may be 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 in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. The processors in various embodiments of the present application may be general-purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. A general purpose processor may be a microprocessor or any conventional processor or the like. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, read-only memory), random access memory (RAM, random access memory), magnetic disk or optical disk and other media that can store program codes .

Claims

A method for processing signal frames, characterized in that the method comprises:

The receiving device receives a first signal frame from the sending device through the first transmission channel, where the first signal frame includes a first data block and a first check block;

The receiving device receives a second signal frame from the sending device through the second transmission channel, the second signal frame includes a second data block, and there is a mapping relationship between the first check block and the second signal frame ;

The receiving device sorts the first data block and the second data block according to the mapping relationship to obtain a target signal frame, and the sorting order of the first data block and the second data block is equal to the The transmission order of the first signal frame and the second signal frame.
The method according to claim 1, wherein the second signal frame further comprises a second check block, and a mapping relationship between the first check block and the second signal frame comprises:

The first check block and the second check block have a first mapping relationship.
The method according to claim 1 or 2, wherein the payload of the first check block is equal to the payload of the second data block, and the first check block and the second signal frame Existing mapping relationships include:

The first check block and the second data block have a second mapping relationship.
The method according to claim 3, wherein the receiving device sorting the first data block and the second data block according to the mapping relationship comprises:

The receiving device determines, according to the first mapping relationship, the first check block corresponding to the second check block;

The receiving device determines, according to the second mapping relationship, the second data block corresponding to the first check block;

The receiving device sorts the first data block and the second data block.
The method according to any one of claims 1 to 4, wherein the method further comprises:

If the first transmission channel or the second transmission channel is disconnected, the receiving device receives a third signal frame from the sending device through the undisconnected transmission channel, and the third signal frame is in the The signal frame transmitted after the first signal frame and the second signal frame.
The method according to any one of claims 2 to 4, wherein the first mapping relationship comprises:

The payload of the first parity block is the same as the payload of the second parity block.
The method according to any one of claims 2 to 4, wherein the first mapping relationship comprises:

The payload of the specific area of the first parity block is the same as the payload of the specific area of the second parity block.
The method according to any one of claims 2 to 4, wherein the first mapping relationship comprises: the value of the valid value range in the first check block is equal to the cycle of the second check block The checksum of the redundancy check CRC algorithm.
The method according to claim 3 or 4, wherein the second mapping relationship comprises: a value of a valid value field in the first check block is equal to a checksum of a CRC algorithm of the second data block .
A method for processing signal frames, characterized in that the method comprises:

The sending device sends a first signal frame to the receiving device through the first transmission channel, where the first signal frame includes a first data block and a first check block;

The sending device sends a second signal frame to the receiving device through the second transmission channel, where the second signal frame includes a second data block, and there is a mapping between the first check block and the second signal frame The mapping relationship is used by the receiving device to sort the first data block and the second data block to obtain a target signal frame, and the arrangement order of the first data block and the second data block Equal to the transmission order of the first signal frame and the second signal frame.
The method according to claim 10, wherein the second signal frame further comprises a second check block, and a mapping relationship between the first check block and the second signal frame comprises: the first check block The check block and the second check block have a first mapping relationship.
The method according to claim 10 or 11, wherein the payload of the first check block is equal to the payload of the second data block, the first check block and the second signal frame The existence of a mapping relationship includes: a second mapping relationship exists between the first check block and the second data block.
The method according to any one of claims 10 to 12, wherein the method further comprises: if the first transmission channel or the second transmission channel is disconnected, the sending device passes the The disconnected transmission channel sends a third signal frame to the receiving device, where the third signal frame is a signal frame transmitted after the first signal frame and the second signal frame.
The method according to claim 11, wherein the first mapping relationship comprises: the payload of the first check block is the same as the payload of the second check block.
The method according to claim 11, wherein the first mapping relationship comprises: the payload of the specific area of the first parity block is the same as the payload of the specific area of the second parity block.
The method according to claim 11, wherein the first mapping relationship comprises: a value of a valid value field in the first check block is equal to a cyclic redundancy check (CRC) algorithm of the second check block checksum.
The method according to claim 12, wherein the second mapping relationship comprises: a value of a valid value field in the first check block is equal to a checksum of a CRC algorithm of the second data block.
A chip, characterized in that the chip includes a processor and a transceiver interface, the transceiver interface and the processor are connected to each other through a line, and the transceiver interface is used to receive the transceiver according to any one of claims 1 to 9. a first signal frame, a second signal frame, and a third signal frame, and the processor is configured to process the first signal frame, the second signal frame, and the third signal frame acquired by the transceiver interface , performing the method as claimed in any one of claims 1 to 9.
A chip, characterized in that the chip includes a processor and a transceiver interface, the transceiver interface and the processor are connected to each other through a line, and the processor is configured to execute the method described in any one of claims 10 to 17 method, wherein the transceiver interface is used for sending the first signal frame, the second signal frame and the third signal frame according to any one of claims 10 to 17.
An optical network device, characterized in that it includes: a chip and an optical transceiver, the chip and the optical transceiver are connected to each other through a line; Methods.
An optical network device, comprising: a chip and an optical transceiver, wherein the chip and the optical transceiver are connected to each other through lines;

The chip is used to perform the method as claimed in any one of claims 10 to 17.
An optical network system, characterized in that the optical network system comprises the receiving device according to any one of claims 1 to 9 and the sending device according to any one of claims 10 to 17 .