CN114567410B

CN114567410B - Signal frame processing method and related equipment

Info

Publication number: CN114567410B
Application number: CN202011364406.XA
Authority: CN
Inventors: 葛金亮
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2024-05-17
Anticipated expiration: 2040-11-27
Also published as: CN114567410A; WO2022111323A1

Abstract

The embodiment of the application provides a signal frame processing method and related equipment. When the transmission channels need to be switched, another transmission channel between the receiving device and the transmitting device can be created first, and then the receiving device and the transmitting device of the same service can transmit service data through the two transmission channels. After receiving the service data from different transmission channels, the receiving device can sort the service data according to the original service sequence. Furthermore, when the transmission channels need to be switched, after one of the transmission channels is disconnected, one transmission channel still remains between the receiving device and the transmitting device. Therefore, the service data can be continuously transmitted through the transmission channel which is not disconnected, so that service interruption is avoided, and user experience is improved.

Description

Signal frame processing method and related equipment

Technical Field

The embodiment of the application relates to the field of optical communication, in particular to a signal frame processing method and related equipment.

Background

Optical transport networks (OTN, optical transport network) are a very important hard pipeline transmission technology at present, and have the characteristics of high bandwidth, large capacity, high flexibility and the like. In ONT technology, service data may be mapped to a flexible optical service unit (OSUflex, flexible optical service unit) with smaller granularity and then transmitted through an optical service unit (OSU, optical service unit) pipe.

As shown in fig. 1, the service data of each service is respectively transmitted to an optical channel data unit (ODU, optical data unit) through an OSU pipe for carrying. When a service 4 that needs to occupy 600M bandwidth needs to be accessed into ODU0, the ODU0-2 cannot directly carry the service 4 because the remaining bandwidth of ODU0-2 is 400M.

As shown in fig. 2, the service 2 occupying 400M of bandwidth may be disconnected and switched to the ODU0-1 with the remaining bandwidth of 400M for carrying. After the switching, the residual bandwidth of the ODU0-2 is 800M, and at this time, the ODU0-2 can carry the service 4 occupying 600M of bandwidth. However, in the service switching process, the service is disconnected, so that the user experience is affected.

Disclosure of Invention

The embodiment of the application provides a signal frame processing method and related equipment, which are used for avoiding service interruption and influencing user experience when switching a transmission channel of a service.

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

The receiving device receives a first signal frame from the transmitting device through a first transmission channel, the first signal frame including a first data block and a first check block. And, the receiving device receives a second signal frame from the transmitting device over the second transmission channel, the second signal frame comprising a second data block. Wherein the first data and the second data block are used for carrying service data. The first check block and the second signal frame have a mapping relation.

After receiving the first signal frame and the second signal frame from different transmission channels, the receiving device can complete the search between the first signal frame and the second signal frame through the mapping relation between the first check block and the second signal frame, and determine the arrangement sequence between the first signal frame and the second signal frame. At this time, outputting the first check block is meaningless for the service data. Therefore, the receiving device may arrange the first data block and the second data block in the arrangement order to obtain the target signal frame. Since the order in which the transmission device transmits the first signal frame and the second signal frame is in accordance with 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 the transmission order of the first signal frame and the second signal frame.

In the existing optical network, service data can be transmitted between a receiving device and a transmitting device of the same service only through one transmission channel. In the embodiment of the application, when the transmission channels are required to be switched, another transmission channel between the receiving device and the transmitting device can be created first, and then the receiving device and the transmitting device of the same service can transmit service data through the two transmission channels. After receiving the service data from different transmission channels, the receiving device can sort the service data according to the original service sequence. Furthermore, when the transmission channels need to be switched, after one of the transmission channels is disconnected, one transmission channel still remains between the receiving device and the transmitting device. Therefore, the service data can be continuously transmitted through the transmission channel which is not disconnected, so that service interruption is avoided, and user experience is improved.

Based on the first aspect, in an alternative 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 relation. The receiving device can complete the mutual searching between the first check block and the second check block through the first mapping relation, 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 that less bandwidth resources are required for transmitting the first check block and the second check block. The receiving device finishes the ordering of the first data block and the second data block through the first check block and the second check block, so that the occupation of network resources can be reduced.

Based on the first aspect, in an alternative 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 meanwhile, 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 relation, 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 in the processing process, the service data carried in the first check block can still be used for outputting the service data, thereby improving the reliability of the scheme.

Based on the first aspect, in an alternative implementation manner, the first mapping relation and the second mapping relation may exist between the first signal frame and the second signal frame at the same time. That is, the receiving device may search the first check block corresponding to the second check block through the first mapping relationship, and then search the second data block corresponding to the first check block according to the second mapping relationship, so as to complete the ordering of the first data block and 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, so as to provide more embodiments for searching the first signal frame and the second signal frame.

In an alternative embodiment, when the first transmission channel or the second transmission channel is disconnected, since a transmission channel remains between the receiving device and the transmitting device, a subsequent third signal frame may still be transmitted between the receiving device and the transmitting device through the transmission channel that is not disconnected. The third signal frame is used to represent a signal frame transmitted after the first and second signal frames.

In this embodiment, after one of the transmission channels is disconnected, the service data may further be continuously transmitted through the transmission channel that is not disconnected, so as to avoid service interruption and improve user experience.

Based on the first aspect, in an optional implementation manner, the first mapping relationship may be: the payload of the first parity block is the same as the payload of the second parity block. In another alternative embodiment, the first mapping relationship may be: the payload of the specific region of the first parity block is the same as the payload of the specific region of the second parity block. In yet another alternative embodiment, 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) checksum of said second check block.

Based on the first aspect, in an optional implementation manner, the second mapping relationship may be: the value of the valid value field 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 transmitting device of the same service transmit the signal frames through a transmission channel. When the transmission channel needs to be switched, the following steps are executed: first, another transmission channel between the receiving device and the transmitting device is established. Further, the signal frames can be transmitted between the receiving device and the transmitting device through two transmission channels.

The transmitting device transmits a first signal frame to the receiving device through a first transmission channel, the first signal frame including a first data block and a first check block. And, the receiving device receives a second signal frame from the transmitting device over the second transmission channel, the second signal frame comprising a second data block. Wherein the first data and the second data block are used for carrying service data. The first check block and the second signal frame have a mapping relation. The mapping relationship may be used for 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 transmission device transmits the first signal frame and the second signal frame is in accordance with the order of the service data, 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 second aspect, in an alternative embodiment, 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 relation. The receiving device can complete the mutual searching between the first check block and the second check block through the first mapping relation, and sort the first data block and the second data block.

Based on the second aspect, in an alternative embodiment, 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, there is a second mapping relationship 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 relation, and sort the first data block and the second data block according to the arrangement order.

Based on the second aspect, in an alternative embodiment, when the first transmission channel or the second transmission channel is disconnected, since a transmission channel is still reserved between the receiving device and the transmitting device, a subsequent third signal frame may still be transmitted through the transmission channel that is not disconnected between the receiving device and the transmitting device. The third signal frame is used to represent a signal frame transmitted after the first and second signal frames.

Based on the second aspect, in this embodiment, a mapping relationship between the first check block and the second signal frame is provided, and details of the first aspect are referred to herein, which are not described in detail.

In a third aspect, an embodiment of the present application provides a receiving apparatus. The receiving apparatus includes: a receiving unit and a processing unit. The receiving unit is configured to receive a first signal frame from a transmitting 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 transmitting device through a 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. And the processing unit is used for sequencing the first data block and the second data block according to the mapping relation to obtain a target signal frame, and the arrangement sequence of the first data block and the second data block is equal to the transmission 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 the mapping relationship between the first check block and the second signal frame includes: and the first check block and the second check block have a first mapping relation.

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 mapping relationship between the first check block and the second signal frame includes: and a second mapping relation 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, according to the first mapping relationship, the first check block corresponding to the second check block; determining the second data block corresponding to the first check block according to the second mapping relation; the first data block and the second data block are ordered.

Based on the third aspect, in an optional implementation manner, the receiving unit is specifically configured to receive, when the first transmission channel or the second transmission channel is disconnected, a third signal frame from the transmitting device through a transmission channel that is not disconnected, where 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, a mapping relationship between the first check block and the second signal frame is provided, and details of the first aspect are specifically referred to, and will not be described herein.

In a fourth aspect, an embodiment of the present application provides a transmitting apparatus. The transmission apparatus includes a first transmission unit and a second transmission unit. The first transmitting unit is configured to transmit 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. And a second transmitting unit, configured to transmit a second signal frame to the receiving device through the second transmission channel, where the second signal frame includes a second data block. The first check block and the second signal frame have a mapping relation, the mapping relation is used for the receiving device to sequence the first data block and the second data block to obtain a target signal frame, and the arrangement sequence of the first data block and the second data block is equal to the transmission sequence 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 the mapping relationship between the first check block and the second signal frame includes: and the first check block and the second check block have a first mapping relation.

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 mapping relationship between the first check block and the second signal frame includes: and a second mapping relation 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 send, when the first transmission channel or the second transmission channel is disconnected, a third signal frame to the receiving device through a transmission channel that is not disconnected, 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, a mapping relationship between the first check block and the second signal frame is provided, and details of the first aspect are specifically referred to, and will not be described herein.

In a fifth aspect, an embodiment of the present invention provides a chip. The chip comprises a processor and a transceiver interface, the transceiver interface and the processor are connected with each other through a line, and the transceiver interface is used for executing the steps related to the transceiver of the signal frames, which are shown in the first aspect. The processor is configured to perform the steps associated with the process shown in the first aspect above.

In a sixth aspect, an embodiment of the present invention provides a chip. The chip comprises a processor and a transceiver interface, the transceiver interface and the processor are connected with each other through a line, and the transceiver interface is used for executing the steps related to the transceiver of the signal frames, which are shown in the first aspect. The processor is configured to perform the steps associated with the process shown in the first aspect above.

In a seventh aspect, an embodiment of the present application provides an optical network device. The optical transmission device includes: chip and optical transceiver. The chip and the optical transceiver are connected to each other through a line, and the chip is configured to perform the signal frame processing method described 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. The optical transmission device includes: chip and optical transceiver. The chip and the optical transceiver are connected to each other through a line, and the chip is configured to perform the signal frame processing method described 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 transmitting device of the fourth aspect. The receiving device in the optical network system may perform the method of any one of the possible implementation manners of the first aspect and the first aspect; the transmitting device in the optical network system may perform the method of any one of the possible implementations of the second aspect and the second aspect.

Drawings

FIG. 1 is an application scenario diagram of a conventional ONT network;

fig. 2 is a schematic diagram of transmission channel switching in a conventional ONT network;

FIG. 3 is a schematic diagram of an optical transmission system according to an embodiment of the present application;

FIG. 4 is a schematic diagram of a hardware configuration of an OTN device;

FIG. 5 is a schematic diagram of a possible signal frame structure according to the present application;

FIG. 6 is a schematic diagram of the structure of a data block and a check block according to the present application;

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

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

FIG. 9 is a diagram illustrating a mapping relationship between a first check block and a second check block according to the present application;

FIG. 10 is a schematic diagram illustrating an ordering of a first data block and a second data block according to an embodiment of the present application;

FIG. 11 is a schematic diagram illustrating another ordering of a first data block and a second data block according to an embodiment of the present application;

FIG. 12 is a schematic diagram of still another ordering of a first data block and a second data block according to an embodiment of the present application;

FIG. 13 is a schematic diagram of still another ordering of a first data block and a second data block according to an embodiment of the present application;

fig. 14 is a diagram showing an example of the structure of an embodiment of a receiving apparatus in the embodiment of the present application;

fig. 15 is a diagram showing an example of the structure of an embodiment of a transmitting apparatus in the embodiment of the present application;

fig. 16 is a schematic structural view of one possible optical transmission device according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

The embodiment of the application provides a signal frame processing method and related equipment, which are used for avoiding service interruption when a transmission channel needs to be switched.

Embodiments of the present application will now be described with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the present application. As one of ordinary skill in the art can know, with the development of technology and the appearance of new scenes, the technical scheme provided by the embodiment of the application is also applicable to similar technical problems.

The terms first, second and the like in the description and in the claims and drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate, merely to describe the manner in which objects of the same nature are distinguished in describing embodiments of the present application. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

Embodiments of the present application are applicable to optical networks, 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 solution of the present application, in the embodiment of the present application, an OTN is taken as an example for illustration. The optical transport network is typically formed by connecting a plurality of devices through optical fibers, and may be formed into different topology types such as a line type, a ring type, or a mesh type according to specific needs.

Fig. 3 presents a schematic view of a network architecture applicable to an embodiment of the application. The OTN as shown in fig. 3 includes two OTN networks (OTN network 1 and OTN network 2, respectively). Each OTN network includes a certain number of OTN devices (denoted by N in fig. 3), links between devices within the OTN network are intra-domain links, and links between devices between the OTN networks are inter-domain links. An OTN device may have one or more functions according to actual needs. Generally, OTN devices are classified into optical layer devices, electrical layer devices, and opto-electronic hybrid devices. An optical layer device refers to a device capable of processing an optical layer signal, such as: optical amplifiers (OA, optical amplifier). An electrical layer device refers to a device capable of processing an electrical layer signal, such as: an apparatus capable of processing an ODU signal. An opto-electronic hybrid device refers to a device that has the capability to process both optical layer signals and electrical layer signals. It should be noted that, according to specific integration requirements, one OTN device may integrate multiple different functions. The technical scheme provided by the application is suitable for OTN equipment with different forms and integration levels.

Fig. 4 is a schematic diagram of a hardware structure of the OTN device. Specifically, the ONT device includes a power supply 401, a fan 402, an auxiliary board 403, and possibly 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 and communication board 407. It should be noted that, depending on the specific needs, the types and numbers of veneers specifically included in an ONT device may not be the same. For example, a network device acting as a core node may not have a tributary board 404. There may be multiple tributary boards 404 for the network device as an edge node. The power supply 401 is used to supply power to the device, and may include a main power supply and a standby power supply. The fan 402 is used to dissipate heat from the device. The auxiliary class board 403 is used for providing auxiliary functions such as external alarms or accessing an external clock. Tributary board 404, cross board 406, and line board 405 are primarily for processing electrical layer signals (e.g., first signal frames and second signal frames in the present application) of an optical network. The tributary board 404 is used to implement receiving and transmitting of various customer services, such as packet service, ethernet service, and forwarding service. Still further, the bypass board 404 may be divided into a client side module and a processor. The client-side optical module may be an optical transceiver, for receiving and/or transmitting client signals. The processor is used for realizing the mapping and demapping processing of the client signal to the electric layer signal. The cross board 406 is used to implement 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 processing of the circuit-side electrical layer signals. Specifically, the wiring board 405 may be divided into a line-side optical module and a processor. The line-side optical module may be a line-side optical transceiver, and is configured to receive and/or transmit electrical layer signals. The processor is used for multiplexing and demultiplexing the electrical layer signals at the line side or mapping and demapping processing. The system control and communication class board 407 is used to implement system control and communication. Specifically, information can be collected from different single boards through the back board, or a control instruction can be sent to the corresponding single boards. It should be noted that the specific components (e.g., processor) may be one or more, and the application is not limited in any way, unless specifically stated. It should also be noted that, the embodiment of the present application does not limit the type of the boards included in the device, and the specific functional design and number of the boards. It should be noted that, the signal frame processing method of the present application may be implemented on the circuit board 405, or the tributary board 404 and the circuit board 405 may be integrated together to implement the signal frame processing method of the present application.

Fig. 5 is a schematic diagram of a possible signal frame structure according to the present application. As shown in fig. 5, a signal frame, e.g., an optical payload unit k (optical payload unit k, OPUk) frame 501, is divided into a plurality of Payload Blocks (PB) 5011. The payload block 5011 includes an overhead area and a payload area, where the payload area is used to carry service data, and then carried in the OPUk501 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 (or may carry service data, see the description of the following embodiments for details). The overhead area in the check block 601 has a special identification 6011 for distinguishing the check block 601 from the payload block carrying the traffic data. For convenience of distinguishing description, in the 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 a signal frame received by the receiving apparatus includes the check block 601, the receiving apparatus does not directly output the signal frame. The receiving device needs to first find other signal frames having a mapping relation with the signal frame. Specifically, the mapping relationship may exist for a check block in a signal frame. In the embodiment of the application, the receiving equipment can complete the mutual searching among the signal frames through the mapping relation. And sorts the data blocks 602 carrying the service data in the signal frames to obtain the target signal frames arranged according to the original service data sequence.

In the existing OTN network, the receiving device and the transmitting device of the same service transmit service data through a transmission channel. The receiving device can directly output the service data after receiving the service data, so that the searching and sequencing of the service data do not need to be designed. Fig. 7 is an application scenario diagram of the present application. As shown in fig. 7, in the embodiment of the present application, when a transmission channel needs to be switched, another transmission channel between a sending device and a receiving device may be established first, so that the sending device and the receiving device of the same service may establish connection through the two transmission channels. The transmitting device transmits a signal frame to the receiving device through two transmission channels. After receiving the signal frames from the two different transmission channels, the receiving device can splice the different signal frames according to the sequence of the service data through the mapping relation between the signal frames to obtain the target signal frames. When switching of the transmission channels is needed, one of the transmission channels is disconnected, and the service data can still be transmitted through the other transmission channel, so that service interruption is avoided.

Specifically, after the receiving device receives 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, so as to complete the ordering between the data blocks. The sorting among the data blocks can also be completed by searching the check blocks in the first signal frame and the data blocks in the second signal frame. The following describes the above two embodiments separately.

1. The first check block and the second check block are searched mutually, and sorting among the data blocks is completed.

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

801. Establishing a second transmission channel between the receiving equipment and the transmitting equipment;

In the present application, taking OTN as an example, the corresponding transmission channel is an OSU channel. In the process of transmitting service data through one OSU pipeline, when a transmission channel needs to be switched, another new OSU pipeline with the same size as the original service bandwidth can be created first, and the service transmitting device and the service receiving device are connected.

It should be noted that, in the present application, the first transmission channel and the second transmission channel are two different transmission channels of the same service. Specifically, the first transmission channel or the second transmission channel may refer to a transmission channel that is in operation, or may be a newly-built transmission channel. For ease of understanding, embodiments of the present application will be described taking a currently operating transmission channel as the first transmission channel as an example. And simultaneously, taking the newly established transmission channel as a second transmission channel.

802. The transmitting device transmits a first signal frame to the receiving device through a first transmission channel;

In the present application, the first signal frame sent by the sending device may include a first data block and a first check block. Wherein the data block is used for bearing service data. The check block is a special data block, and the check block itself may not bear service data. The overhead area in the check block has a special identification for distinguishing the check block from the data block carrying the service data.

The number of the first data blocks is not limited by the present application. In practical applications, the first data block may refer to one data block, or may be a generic name of a plurality of data blocks included in the first signal frame. For convenience of the following description, the present application is described with the first data block as a generic term of the data block No. 1 and the data block No. 2. Similarly, the present application is not limited to the number of second data blocks. For convenience of the following description, the present application will be described with reference to the second data block as a generic term of the data block No.3 and the data block No. 4.

803. The transmitting device transmits a second signal frame to the receiving device through a second transmission channel;

In this embodiment, the second signal frame may include a second data block and a second check block. For convenience of the following description, in this and the following embodiments, the first check block is named as a C code, and the second check block is named as an S code. Referring to fig. 10 or fig. 11, a specific interaction scenario between a transmitting device and a receiving device according to the present application is described in connection with step 802.

Specifically, in order to ensure accuracy of the service data, the sequence in which the transmitting device transmits the first signal frame and the second signal frame is transmitted according to the original sequence of the service data. Meanwhile, in order to facilitate sorting of the data blocks through the mapping relation of the check blocks, the C code in the first signal frame can be sent after the data block number 2 and the data block number 1. 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 may be sent before the data block No. 4 and the data block No. 3, that is, in this case, in the second signal frame, the positional relationship between the check block and the data block may be (4, 3, S).

Further, the first check block has a mapping relation with a 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 realize mutual searching of the first check block and the second check block through the mapping relation.

Fig. 9 is a schematic diagram of a partial mapping relationship between check blocks according to an embodiment of the present application. As shown in fig. 9, the present application provides several mapping relationships between check blocks as follows.

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

b: the payload of the specific region of the C code is the same as the payload of the specific region of the S code;

C: the Value of the effective Value field (Value area) of the C code is the cyclic redundancy check (CRC, cyclic redundancy check) checksum of the S code, and the specific CRC algorithm mode is not limited in the present application.

The S code Value area carries a secret key, the Value of the C code Value area is a Value calculated by combining the secret key in the S code with an encryption algorithm, and the specific encryption algorithm mode is not limited.

E: the Value of the Value area of the C code is the same as the Value of the Value area of the data block after the S code.

F: the Value of the Value area of the C code is the CRC checksum of the data block after the S code, and the application is not limited by a specific CRC algorithm mode.

G: the Value of the S code Value area carries a secret key, the Value of the C code Value area is a Value calculated by combining the secret key in the S code with an encryption algorithm, the encrypted original data is the Value of a data block after the S code, and the specific encryption algorithm mode is not limited.

It should be noted that the above-described mapping relationship is only an example. In practical applications, other mapping relationships are also possible. The method has the effect that the receiving equipment can search the corresponding check block through the mapping relation, so that the signal frames are spliced.

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

Because the mapping relation exists between the C code in the first signal frame and the S code in the second signal frame, after the receiving device receives the first signal frame and the second signal frame, the first signal frame and the second signal frame can be searched according to the mapping relation. And sorting the first data block and the second data block according to the initial service data sequence to obtain the target signal frame.

It should be noted that, in the embodiment of the present application, the receiving device may implement bidirectional searching between check blocks based on the mapping relationship. The C code can be searched by the S code, and the S code can be searched by the C code. For convenience of description, this embodiment and the following embodiments will be described by taking a unidirectional searching manner of searching for a C code by an S code as an example.

Specifically, although the transmitting apparatus transmits the first signal frame and the second signal frame in the initial order of the traffic data. However, in practical applications, because the two transmission channels often have different time delays, the receiving device may receive the first signal frame and the second signal frame with different time sequences, which generally may be two cases. The following description is made with reference to the accompanying drawings:

A: as shown in fig. 10, when the delay of the first transmission channel is greater than that of the second transmission channel, the receiving device receives the second signal frame from the second transmission channel, including the data block No. 3, the data block No. 4 and the S code. After receiving the S code, the receiving device starts to search the corresponding C code. However, at this time, the C code has not yet arrived because of the larger delay of the first transmission channel. After receiving the data block 1, the data block 2 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 relation.

Since data block No. 1, data block No. 2 and code C belong to the first signal frame (C, 2, 1) and data block No. 3, data block No. 4 and code S belong to the second signal frame (4, 3, S). After searching the C code by the S code, the receiving device can determine the data of the first signal frame (C, 2, 1) and the second signal frame (4, 3, S) belonging to the same service. At this time, the receiving device aligns and sorts the first signal frame and the second signal frame according to the C code and the S code, and obtains (4, 3, S, C,2, 1). Meanwhile, in this embodiment, the check block is used to assist the first data block and the second data block to complete the sorting, and the check block does not carry service data. The C-code and S-code output by the receiving device are therefore meaningless, i.e. the presence of check blocks is not required in the target signal frame, which only comprises data blocks (4, 3,2, 1).

In the application, the target signal frame obtained by sequencing the first data block and the second data block by the receiving device comprises complete service data with correct sequencing, so the receiving device can output the target signal frame.

B: as shown in fig. 11, when the delay of the second transmission channel is greater than that of the first transmission channel, the receiving device receives the first signal frame from the first transmission channel, including the data block 1, the data block 2 and the C code. The application takes the unidirectional searching mode of searching the C code by the S code as an example, so that the receiving equipment needs to wait for receiving the S code after receiving the C code. After receiving the data block No. 3, the data block No. 4 and the S code from the second transmission channel, the receiving device can search the corresponding C code by using the S code through the mapping relationship. The specific manner of ordering the first data block and the second data block may refer to the description of the scenario a in step 804, which is not described herein.

In consideration of the problem of time delay difference between the first transmission channel and the second transmission channel in practical application, the scheme of the application can set proper buffer memory in the receiving equipment to solve the influence caused by time delay.

805. Disconnecting the first transmission channel;

After the receiving device obtains the target signal frame, it indicates that the switching of the service data is completed. Subsequent service data can be transmitted through the second transmission channel between the sending device and the receiving device. Therefore, the original first transmission channel can be disconnected.

806. Transmitting other signal frames between the receiving device and the transmitting device through a second transmission channel;

At this time, the original first transmission channel is cut off, and the newly-built second transmission channel can still bear subsequent service data, so that the condition of service data interruption does not exist.

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 transmitted through the two transmission channels respectively. Wherein the first signal frame comprises a first check block and the second signal frame comprises a second check block. After receiving the signal frames from the two transmission channels, the receiving device sorts the first data block and the second data block according to the mapping relation of the first check block and the second check block, and then obtains the target signal frame. At this time, the two transmission channels can both bear the service data between the receiving device and the transmitting device, so that after the original first transmission channel is disconnected, the subsequent service data can still be continuously transmitted through the second transmission channel, and the condition of service data interruption is avoided.

2. And the first check block and the second data block are searched mutually, and sorting among the data blocks is completed.

The processing flow provided in this embodiment is similar to that of the embodiment corresponding to fig. 8. Another processing method of a signal frame provided in the present embodiment is described below based on fig. 8. In this example, the processing method of the signal frame includes the following steps.

901. Establishing a second transmission channel between the receiving equipment and the transmitting equipment;

902. the transmitting device transmits a first signal frame to the receiving device through a first transmission channel;

903. The transmitting device transmits a second signal frame to the receiving device through a second transmission channel;

Steps 901 to 903 in this embodiment are similar to steps 801 to 803 described above, and detailed descriptions thereof are omitted herein. In this embodiment, in addition to the mapping relationship between the first check block and the second check block, the mapping relationship also exists between the first check block in the first signal frame and the second data block in the second signal frame. The mapping relationship between the check block and the data block may be specifically referred to the contents from section a to section G in step 803. Meanwhile, the first check block needs to include the same service data as the second data block. I.e. the data blocks and check blocks in the first signal frame are (C ₄,C₃, 2, 1) and the data blocks and check blocks in the second signal frame are (4, 3, s). Wherein the C ₄ code is the check code of the data block number 4, and the payload of the C ₄ code is equal to the payload of the data block number 4; the C ₃ code is the check code of the data block number 3, and the payload of the C ₃ code is equal to the payload of the data block number 3. A specific interaction scenario between the transmitting device and the receiving device in this embodiment may refer to fig. 12 or fig. 13.

Similarly, the receiving device can realize bidirectional searching between the check block and the data block based on the mapping relation. The data blocks No. 4 and No. 3 can be searched by the codes C ₄ and C ₃, and the codes C ₄ and C ₃ can also be searched by the data blocks No. 4 and No. 3. For convenience of description, this embodiment and the following embodiments will take a unidirectional searching manner of searching the data blocks No. 4 and No. 3 by using the C ₄ code and the C ₃ code as an example for explanation.

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

step 904 is similar to step 804, and in practical applications, because the two transmission channels often have different time delays, the receiving device will receive the first signal frame and the second signal frame with different time sequences, which generally results in two situations. The following description is made with reference to the accompanying drawings:

A: as shown in fig. 12, when the delay of the first transmission channel is greater than that of the second transmission channel, the receiving device receives the second signal frame from the second transmission channel, including the data block No. 3, the data block No. 4, and two S codes. Taking a unidirectional searching mode of searching the data blocks of No. 4 and No. 3 through the codes of C ₄ and C ₃ as an example, after receiving the data blocks of No. 4 and No. 3, the receiving device needs to start searching the corresponding codes of C ₄ and C ₃ through two codes of S. But at this time, the C ₄ code and the C ₃ code have not yet arrived because of the larger delay of the first transmission channel. After the receiving device receives the number 1 data block, the number 2 data block, and the number C ₄ code and the number C ₃ code from the first transmission channel, the receiving device can find the number C ₄ code and the number C ₃ code corresponding to the number S code through the mapping relationship.

Since data block No. 1, data block No. 2, code C ₄ and code C ₃ belong to the first signal frame (C ₄,C₃, 2, 1) and data block No. 3, data block No. 4 and two S codes belong to the second signal frame (4, 3, S). After searching the C code by the S code, the receiving device can determine the data of the first signal frame (C ₄,C₃, 2, 1) and the second signal frame (4, 3, S) belonging to the same service. Because the mapping relationship exists among the C ₄ code, the C ₃ code, the data block number 4 and the data block number 3, at this time, the receiving device obtains (4, 3, C ₄,C₃, 2, 1) according to the data block number 4 and the data block number 3 corresponding to the alignment of the C ₄ code and the C ₃ code. Meanwhile, in this embodiment, the check block is used to assist the first data block and the second data block in completing the sorting. The receiving device is therefore not required to output the C ₄ code and the C ₃ code, i.e. the presence of check blocks is not required in the target signal frame, which only includes the data blocks (4, 3,2, 1).

B: as shown in fig. 13, when the delay of the second transmission channel is greater than that of the first transmission channel, the receiving device receives the first signal frame from the first transmission channel, including the data block No. 1, the data block No. 2, the C ₄ code and the C ₃ code. When the receiving device receives the C ₄ code and the C ₃ code, it may directly start searching the corresponding data block No. 4 and data block No. 3. But now, due to the larger delay of the second transmission channel, the data block No. 4 and the data block No. 3 have not arrived yet. After receiving the data block number 4 and the data block number 3 and the two S codes from the second transmission channel, the receiving device may find the data block number 4 and the data block number 3 corresponding to the code number C ₄ and the code number C ₃ according to the mapping relationship, and complete the sorting, to obtain (4, 3, C ₄,C₃, 2, 1). Similarly, the receiving device does not need to output the check code, so that the target signal frame only comprises the data blocks (4, 3,2, 1).

Note that, in section B of step 904 of this example, in the case where the receiving device first receives the first signal frame, the receiving device may directly find the second data block directly through the first check block, and sort the second data block, and in this case, the check block in the second signal frame is not needed.

905. Disconnecting the first transmission channel;

906. Transmitting other signal frames between the receiving device and the transmitting device through a second transmission channel;

steps 905 and 906 in this embodiment are similar to steps 805 and 806 described above, and detailed description thereof will be omitted herein.

In this embodiment, the first check block in the first signal frame includes the service data of the second data block in the second signal frame, so when the second data block in the second signal frame is lost in the implementation process in this example, the first check block may be replaced by the first check block, and the first check block is output as the service data, thereby improving the reliability of the scheme.

Fig. 14 is a receiving apparatus according to an embodiment of the present application. The receiving device may be any of the receiving devices described in fig. 8, 10 to 13 above. The receiving apparatus includes: a receiving unit 1401 and a processing unit 1402. The receiving unit 1401 is configured to receive a first signal frame from a transmitting 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 further receive a second signal frame from the transmitting device through a second transmission channel, wherein the second signal frame comprises a second data block. Meanwhile, a mapping relationship may exist between the first check block and the second signal frame. For a specific implementation of the function of the receiving unit 1401, reference may be made to step 802 and step 803 shown in fig. 8, or step 902 and step 903, which will not be described in detail herein.

And a processing unit 1402, configured to sort the first data block and the second data block according to the mapping relationship, so as to obtain a target signal frame. The order in which the transmission device transmits the first signal frame and the second signal frame is the same as the order of the traffic data, and thus the arrangement order of the first data block and the second data block in the resulting target signal frame should also be equal to the transmission order of the first signal frame and the second signal frame. For a specific implementation of the function of the processing unit 1402, reference may be made to step 804 or step 904 shown in fig. 8, which is not described herein.

In this embodiment, the mapping relationship between the first check block and the second signal frame can refer to the related descriptions of steps 802 to 803 and steps 902 to 903 shown in fig. 8, and will not be described herein.

Optionally, the processing unit 1402 may also first find a first check block corresponding to the second check block according to the first mapping relationship. And searching a second data block corresponding to the first check block according to the second mapping relation, and sequencing the first data block and the second data block. Specific implementation may refer to step 904, which is not described herein.

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

In this embodiment, the receiving device may perform the operations performed by the receiving device in any one of the embodiments shown in fig. 8, which are not described herein.

Fig. 15 is a diagram of a transmitting device according to an embodiment of the present application. The transmitting device may be any one of the transmitting devices described in fig. 8, 10 to 13. The transmitting apparatus includes: a first transmission unit 1501 and a second transmission unit 1502. Wherein the first sending unit 1501 is configured to send a first signal frame to a receiving device through a first transmission channel. Wherein the first signal frame comprises a first check block and a first data block carrying traffic data. The second transmitting unit 1502 is configured to transmit a second signal frame to the receiving device through a second transmission channel, where the second signal frame includes a second data block. Meanwhile, a mapping relationship may exist between the first check block and the second signal frame. The mapping relation is used for ordering the first data block and the second data block by the receiving equipment to obtain a target signal frame. The order in which the transmission device transmits the first signal frame and the second signal frame is the same as the order of the traffic data. Therefore, in the resulting 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 specific implementation, reference may be made to step 802 and step 803 shown in fig. 8, or step 902 and step 903, which are not described herein.

In this embodiment, the mapping relationship between the first check block and the second signal frame can be specifically described with reference to steps 802 to 803 and steps 902 to 903 shown in fig. 8, which are not described herein.

Optionally, after the first transmission channel or the second transmission channel is disconnected, at least one transmission channel remains between the receiving device and the transmitting device. Thus, the transmitting device may still transmit the third signal frame to the receiving device via the transmission channel that is not disconnected. The third signal frame refers to a signal frame transmitted after the first signal frame and the second signal frame. For specific implementation, please refer to the related description of step 805 or step 905, which is not described herein.

In this embodiment, the transmitting device may perform the operations performed by the transmitting device in any one of the embodiments shown in fig. 8, which are not described herein in detail.

Fig. 16 is a schematic diagram of one possible optical transmission device. The optical transmission device includes a chip 1601, an optical transceiver 1602. Optionally, the optical transmission device may further comprise a memory (not shown in the figure). The chip 1601, optical transceiver 1602 and memory are interconnected by wires. The memory is used for storing program instructions and data. The optical transmission device may be the receiving device shown in fig. 14 or the transmitting device shown 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, where the optical transceiver 1602 is configured to perform the signal frame transceiving operation in the steps shown in fig. 8. The chip 1601 is configured to perform operations other than signal frame transmission and reception in the steps shown in fig. 8.

Fig. 17 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip has integrated therein a processor 1701 and one or more communication interfaces 1702 for implementing the functions of the chip 1601 described above. When a memory is integrated into the chip (not shown), the chip may perform the method steps of any one or more of the preceding embodiments. When the memory is not integrated in the chip, the memory can be connected with an external memory through an interface. The chip implements the actions performed by the optical transmission device in the above embodiments according to the program codes stored in the external memory.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logic function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. The processor in various embodiments of the application may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The general purpose processor may be a microprocessor or any conventional processor or the like. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random-access memory (RAM, random access memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Claims

1. A method of processing a signal frame, the method comprising:

The method comprises the steps that a receiving device receives a first signal frame from a sending device through a first transmission channel, wherein the first signal frame comprises a first data block and a first check block, and the first check block included in the first signal frame is used for indicating the receiving device to search other signal frames with mapping relation with the first signal frame;

the receiving device receives a second signal frame from the transmitting device through a second transmission channel, wherein the second signal frame comprises a second data block, and the first check block and the second signal frame have a mapping relation;

And the receiving equipment sorts the first data block and the second data block according to the mapping relation to obtain a target signal frame, wherein the arrangement sequence of the first data block and the second data block is equal to the transmission sequence of the first signal frame and the second signal frame.

2. The method of claim 1, wherein the second signal frame further comprises a second check block, wherein the mapping between the first check block and the second signal frame comprises:

and the first check block and the second check block have a first mapping relation.

3. The method of claim 2, wherein the payload of the first check block is equal to the payload of the second data block, wherein the mapping of the first check block to the second signal frame comprises:

And a second mapping relation exists between the first check block and the second data block.

4. The method of claim 3, wherein the receiving device ordering the first data block and the second data block according to the mapping relationship comprises:

the receiving equipment determines the first check block corresponding to the second check block according to the first mapping relation;

The receiving equipment determines the second data block corresponding to the first check block according to the second mapping relation;

the receiving device orders the first data block and the second data block.

5. The method according to any one of claims 1 to 4, further comprising:

If the first transmission channel or the second transmission channel is disconnected, the receiving device receives a third signal frame from the transmitting device through the transmission channel which is not disconnected, wherein the third signal frame is a signal frame transmitted after the first signal frame and the second signal frame.

6. The method according to any one of claims 2 to 4, wherein the first mapping relation includes:

the payload of the first check block is the same as the payload of the second check block.

7. The method according to any one of claims 2 to 4, wherein the first mapping relation includes:

the payload of the specific region of the first parity block is the same as the payload of the specific region of the second parity block.

8. The method according to any one of claims 2 to 4, wherein the first mapping relation includes: the value of the valid value field in the first check block is equal to the checksum of the Cyclic Redundancy Check (CRC) algorithm of the second check block.

9. The method of claim 3 or 4, wherein the second mapping relationship comprises: the value of the valid value field in the first check block is equal to the checksum of the CRC algorithm of the second data block.

10. A method of processing a signal frame, the method comprising:

the method comprises the steps that a sending device sends a first signal frame to a receiving device through a first transmission channel, wherein the first signal frame comprises a first data block and a first check block, and the first check block included in the first signal frame is used for indicating the receiving device to search other signal frames with mapping relation with the first signal frame;

the sending device sends a second signal frame to the receiving device through a second transmission channel, the second signal frame comprises a second data block, a mapping relation exists between the first check block and the second signal frame, the mapping relation is used for the receiving device to sequence the first data block and the second data block to obtain a target signal frame, and the sequence of the first data block and the second data block is equal to the sending sequence of the first signal frame and the second signal frame.

11. The method of claim 10, wherein the second signal frame further comprises a second check block, wherein the mapping between the first check block and the second signal frame comprises: and the first check block and the second check block have a first mapping relation.

12. 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, wherein the mapping between the first check block and the second signal frame comprises: and a second mapping relation exists between the first check block and the second data block.

13. The method according to any one of claims 10 to 11, further comprising: if the first transmission channel or the second transmission channel is disconnected, the transmitting device transmits a third signal frame to the receiving device through the transmission channel which is not disconnected, wherein the third signal frame is a signal frame transmitted after the first signal frame and the second signal frame.

14. The method of 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.

15. The method of claim 11, wherein the first mapping relationship comprises: the payload of the specific region of the first parity block is the same as the payload of the specific region of the second parity block.

16. The method of claim 11, wherein the first mapping relationship comprises: the value of the valid value field in the first check block is equal to the checksum of the Cyclic Redundancy Check (CRC) algorithm of the second check block.

17. The method of claim 12, wherein the second mapping relationship comprises: the value of the valid value field in the first check block is equal to the checksum of the CRC algorithm of the second data block.

18. A chip, characterized in that the chip comprises a processor and a transceiver interface, the transceiver interface and the processor are connected to each other by a line, the transceiver interface is configured to receive a first signal frame and a second signal frame according to any one of claims 1 to 9, and the processor is configured to process the first signal frame and the second signal frame acquired by the transceiver interface, and perform the method according to any one of claims 1 to 9.

19. A chip comprising a processor and a transceiver interface, the transceiver interface and the processor being interconnected by a line, the processor being configured to perform the method of any one of claims 10 to 17, the transceiver interface being configured to transmit the first signal frame and the second signal frame of any one of claims 10 to 17.

20. An optical network device, comprising: a chip and an optical transceiver, the chip and the optical transceiver being connected to each other by a wire; the chip being for performing the method of any one of claims 1 to 9.

21. An optical network device, comprising: a chip and an optical transceiver, the chip and the optical transceiver being connected to each other by a wire;

The chip being for performing the method of any one of claims 10 to 17.

22. An optical network system, characterized in that it comprises the optical network device of claim 20 and the optical network device of claim 21.