CN110830143B

CN110830143B - Service transmission method and device, optical transport network equipment and storage medium

Info

Publication number: CN110830143B
Application number: CN201810916576.0A
Authority: CN
Inventors: 张源斌; 苑岩
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2018-08-13
Filing date: 2018-08-13
Publication date: 2022-03-25
Anticipated expiration: 2038-08-13
Also published as: WO2020034966A1; CN110830143A

Abstract

The embodiment of the invention provides a service transmission method and a device, optical transport network equipment and a storage medium, wherein a service to be transmitted is mapped into an optical channel data unit, the optical channel data unit comprises payloads of M PCS coding blocks and expenses of N PCS coding blocks, and finally the obtained optical channel data unit is sent out through a transmission interface, namely the payload and the expenses of the optical channel data unit obtained through mapping are specifically mapped through the M/N proportional relation, a new optical channel data unit is obtained through the mapping mode, the structure is designed according to the transmission requirement required by a client service, based on the structure, the hardware realization is simpler when the optical transport network equipment is designed, and the transcoding processing of various types of services is convenient to perform, so that the processing efficiency and the transmission efficiency of high-speed compressed services are achieved, meanwhile, the consumption of transmission power consumption of the equipment is reduced, and the development cost of the equipment is reduced.

Description

Service transmission method and device, optical transport network equipment and storage medium

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to but not limited to a service transmission method and device, optical transport network equipment and a storage medium.

Background

The Optical Transport Network (OTN) standard is established by the international telecommunications union (ITU-T), and is an important standard for Optical transmission equipment, and almost all long-distance transmission networks are now composed of equipment based on the OTN standard.

When carrying out ethernet service transmission through an OTN, in the transmission process of the ethernet service, a required mapping level is that the ethernet service is first mapped to a low-order optical channel data unit ODUk, the low-order optical channel data unit ODUk is mapped to a high-order optical channel data unit ODUk, and an overhead ratio of 1/239 is added to each mapping, which finally results in that the corresponding OTN interface rate is higher than the ethernet rate, and a corresponding dual-rate optical module is also developed for use by the OTN interface. In addition, the currently defined OTN structure is based on bytes, while the ethernet service is based on PCS coding blocks (such as 66b), when the ethernet service is mapped to the optical channel data unit ODUk, 66b and bytes are not very matched, and the structure of the optical channel data unit ODUk based on bytes is also inconvenient for performing ethernet-like transcoding to adapt the forward error correction FEC and perform speed reduction processing.

According to the present situation and future estimation, more and more interfaces adopt an ethernet format, which means that the main customer service of future OTN devices will be ethernet service, and if the existing mapping mode is maintained, dual-rate optical modules still need to be developed, which causes higher cost, causes low transmission efficiency, and increases the power consumption of the OTN.

Disclosure of Invention

The embodiment of the invention provides a service transmission method and device, an optical transport network device and a storage medium, and mainly solves the technical problems that: the prior ONT transmission service is realized too complicated, and the power consumption and the efficiency are not good.

To solve the foregoing technical problem, an embodiment of the present invention provides a service transmission method, including:

mapping a service to be transmitted into an optical channel data unit, wherein the optical channel data unit comprises payloads of M PCS coding blocks and overheads of N PCS coding blocks; wherein N and M are positive integers greater than or equal to 1 and M is greater than N;

and sending the optical channel data unit mapped with the service to be transmitted out through a transmission interface.

In order to solve the above technical problem, an embodiment of the present invention further provides a service transmission apparatus, including:

the device comprises a mapping module, a data unit and a data processing module, wherein the mapping module is used for mapping a service to be transmitted into an optical channel data unit, and the optical channel data unit comprises payloads of M PCS coding blocks and overheads of N PCS coding blocks; wherein N and M are positive integers greater than or equal to 1 and M is greater than N;

and the sending module is used for sending the optical channel data unit mapped with the service to be transmitted out through a transmission interface.

In order to solve the above technical problem, an embodiment of the present invention further provides an optical transport network device, where the optical transport network device includes a processor, a memory, and a communication bus;

the communication bus is used for realizing connection communication between the processor and the memory;

the processor is configured to execute one or more programs stored in the memory to implement the steps of the traffic transmission method as described above.

To solve the above technical problem, an embodiment of the present invention further provides a computer-readable storage medium, where one or more computer programs are stored, and the one or more computer programs are executable by one or more processors to implement the steps of the service transmission method described above.

The invention has the beneficial effects that:

according to the service transmission method and device, the optical transport network device and the storage medium provided by the embodiment of the invention, the service to be transmitted is mapped into the optical channel data unit, the optical channel data unit comprises the payload of M PCS coding blocks and the overhead of N PCS coding blocks, and finally the obtained optical channel data unit is sent out through the transmission interface, namely the payload and the overhead of the optical channel data unit obtained by mapping are specifically mapped through the M/N proportional relation, a new optical channel data unit is obtained by the mapping mode, and the structure is designed according to the transmission requirement required by the customer service, based on the structure, the hardware realization is simpler when the optical transport network device is designed, and the transcoding processing of various types of services is convenient to be carried out, thereby achieving the processing efficiency and the transmission efficiency of high-speed compression service, meanwhile, the consumption of transmission power consumption of the equipment is reduced, and the development cost of the equipment is reduced.

Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic flow chart of a service transmission method according to a first embodiment of the present invention;

fig. 2 is another schematic flow chart of a service transmission method according to a second embodiment of the present invention;

fig. 3 is a schematic structural diagram of a service transmission apparatus according to a third embodiment of the present invention;

fig. 4 is another schematic structural diagram of a service transmission apparatus according to a third embodiment of the present invention;

fig. 5 is a schematic diagram of a first structure of an ODUk according to an embodiment of the present invention;

fig. 6 is a second structural schematic diagram of an ODUk provided in the embodiment of the present invention;

fig. 7 is a third structural diagram of an ODUk according to an embodiment of the present invention;

fig. 8 is a fourth schematic structural diagram of an ODUk provided in the embodiment of the present invention;

fig. 9 is a fifth structural schematic diagram of an ODUk provided in the embodiment of the present invention;

fig. 10 is a sixth structural schematic diagram of an ODUk provided in the embodiment of the present invention;

FIG. 11 is a schematic view of a 5G foreground scene according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an optical transport network device according to a fourth embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

in the related art, for signal transmission of an optical transport network, it has a standard signal format, including an optical channel transmission unit OTUk (k ═ 1,2,3,4), FlexO, and a new optical transport network signal defined in the future. The optical transport network signal is used for accommodating various non-OTN signals or a plurality of low-speed ODUi (i is 0,1,2,2e,3,4, flex) signals, and the ODUi rate is lower than the ODUk rate, and then the low-speed ODUi (i < k) signal is used for representing the ODUi signal with the lower ODUk rate than the ODUk signal rate; the non-OTN signal refers to various other signals other than the transport network signal, such as an SDH signal, an ethernet signal, a fabric channel signal, various Packet signals, and the like.

The optical transport network signal includes two parts of overhead and payload, and further describes the constituent parts of the optical transport network signal by taking the optical switching unit OTUk signal as an example. The OTUk signal is composed of OTUk, a remaining portion of the OTUk after removing the OTUk overhead is called an optical channel data unit ODUk, a remaining portion of the ODUk after removing the ODUk overhead is called an optical channel payload unit OPUk, a remaining portion of the OPUk after removing the OPUk overhead is called an OPUk payload, the OPUk payload can be used for accommodating a non-OTN signal or a plurality of low-speed ODUi (i < k) signals, and a signal composed of the ODUk is called an ODUk signal.

At present, in the process of mapping an ODUk signal step by step, the size, number, proportion, etc. of the overhead part inserted in the payload of the ODUk signal are all relatively fixed insertion manners, which results in that the finally obtained rate for transmitting the ODUk is greater than the rate required by the service itself, and is not in accordance with the rate requirement of the actual optical transport network device, and in order to adapt to this operation, in the current device setting, transmission interfaces with at least two rates are correspondingly provided, and as ethernet grid type services are more and more, the cost of the device is increased due to the compatible setting of such interfaces, and the power consumption of the device is also increased, which is not beneficial to the efficient transmission of the service, in order to solve the above-mentioned problems, the embodiment of the present invention provides a service transmission method, which calculates and inserts the overhead part inserted during ODUk mapping through the actual requirement of the service, namely, the insertion is carried out according to the proportion of the overhead part corresponding to the actual requirement of the service to be transmitted, thereby realizing the mapping conversion of the service.

Referring to fig. 1, a service transmission method provided in the embodiment of the present invention is mainly applied to customer service conversion of an OTN device in an optical transport network. Specifically, the method comprises the following steps:

s101: the method includes mapping a service to be transmitted into an optical channel data unit, where the service to be transmitted refers to a service based on a data stream format of a PCS coding block, that is, when an initial format of the service is not a PCS coding block, which needs to be converted to obtain a data stream of the PCS coding block, and when the initial format of the service is the PCS coding block, the service to be transmitted is an original service, and the PCS coding block includes at least one of 8b/10b and 64b/66 b.

The optical channel data unit ODUk mapped in this embodiment is not an existing ODUk structure, and in an actual application, the optical channel data unit includes payloads of M PCS coding blocks and overheads of N PCS coding blocks, where the payloads of M PCS coding blocks and the overheads of N PCS coding blocks may also be understood as total payloads of P × M PCS coding blocks and overheads of P × N PCS coding blocks, where the overheads of P × N PCS coding blocks are increased according to a relation between the payloads and the overheads by M/N, where M/N refers to a ratio of the payloads to the overheads, and the ratio may be specifically set according to actual needs of a service to be transmitted, where P, N and M are positive integers greater than or equal to 1, and M is greater than N.

S102: and sending the optical channel data unit mapped with the service to be transmitted out through a transmission interface.

In this embodiment, besides mapping the ODUk according to the service requirement corresponding to the service type, the ODUk may also be mapped after being comprehensively considered according to the service requirement and the transmission requirement of a transmission interface, where the transmission interface refers to an ONT interface on the optical transport network device.

In this embodiment, specifically, in the process of mapping the service to be transmitted to the optical channel data unit, the service to be transmitted is stored in the payload of the optical channel data unit, and the overhead is inserted between the mapped payloads, where the overhead is used to manage and maintain the optical channel data unit, and preferably, the service to be transmitted of the payload is managed or maintained.

In this embodiment, the specific implementation steps of step S102 include:

and determining the proportion of payload to overhead according to the actual requirement of the service, and calculating the total size of the overhead to be inserted into the optical channel data unit.

And mapping and converting the service to be transmitted into the optical channel data unit according to the total overhead size obtained by calculation.

In practical application, the total overhead size includes a plurality of overheads, that is, the overhead portion is composed of at least one overhead, that is, at least one PCS coding block, and the insertion of the overhead is inserting the PCS coding block, so as to adjust the occupation situation of the payload and the overhead of the optical channel data unit, thereby obtaining a new ODUk for transmitting the client service by the user.

At this time, for the specific implementation process of step S102, the client service based on the PCS coding block is first mapped into the low-level optical channel payload unit, then the overhead is inserted into the low-level optical channel payload unit in the existing manner to be converted into the relatively high-level optical channel payload unit, and finally the high-level optical channel payload unit is mapped into the ODUk.

In this embodiment, before step S101, the method further includes:

determining whether the service to be transmitted is in a data stream format based on the PCS coding block, namely judging whether the service type meets the PCS coding block;

and if the service to be transmitted is not in the data stream format based on the PCS coding block, converting the data stream format of the service to be transmitted into the data stream format based on the PCS coding block.

If the service to be transmitted is in the data stream format based on the PCS coding block, keeping the data stream format of the service to be transmitted unchanged

In practical application, the service to be transmitted may include multiple types, for example, an ethernet type service, a non-ethernet service based on a PCS coding block, and even other client service types, and the purpose of determining the service type in this step is to facilitate compatible use of conversion of an ODUk corresponding to a subsequent step, because different client services (i.e., the service to be transmitted) have different requirements for transmission, some need to be transmitted fast, and some need to be transmitted slow.

The conversion in this step is to convert various client services into data streams composed based on PCS code blocks, and execute step S101 based on the converted data streams.

Further, when mapping into an ODUk, mapping is performed according to the determined ratio of payload to overhead, and the overhead of N PCS coding blocks is inserted into every M payloads of PCS coding blocks, thereby obtaining a frame structure meeting the service transmission requirement.

In this embodiment, in step S102, the adding in an M/N relationship according to the payload and the overhead includes:

continuously storing the overhead of the N PCS coding blocks into the payload of the M PCS coding blocks;

or the overhead of the N PCS coding blocks is discontinuously stored in the payloads of the M PCS-based coding blocks.

Further, the discontinuous storage of the overhead of the N PCS coding blocks in the payload of the M PCS coding blocks includes: and averagely storing the overhead of the N PCS coding blocks into the payloads of the M PCS coding blocks.

It can be understood that the sequence should be immediately that the overhead of the N PCS coding blocks is all inserted at a certain position in the payload of the M PCS coding blocks; the discontinuous mode refers to that the overhead of N PCS coding blocks is inserted into the payload of M coding blocks in an irregular or regular mode, and the average insertion (namely, the regular mode) refers to that the overhead of the N PCS coding blocks is uniformly distributed in the payload of the M PCS coding blocks, wherein the average distribution can be the uniform distribution of the positions of the M PCS coding blocks or the uniform distribution of the number of groups for regrouping the N PCS coding blocks; and the overhead is inserted in an irregular mode, namely, the overhead of N PCS coding blocks is irregularly divided into payloads of M PCS coding blocks.

In this embodiment, if the service to be transmitted is an ethernet type service, the converting the service to be transmitted into a data stream format based on a PCS coding block includes:

and performing series processing on the Ethernet type service to convert the Ethernet type service into a data stream based on a specific PCS coding block format, wherein the series processing comprises at least one of data header AM alignment, forward error correction code FEC removal and descrambling.

That is, a series of processes (AM alignment, FEC removal, descrambling, etc.) are first performed to restore the data stream based on a specific PCS coding block format (e.g., 66b/257b, etc.), and then overhead insertion is performed according to the step of step S102 to realize ODUk conversion.

If the service to be transmitted is a non-Ethernet service based on the PCS coding block, the step of converting the service to be transmitted into a data stream format based on the PCS coding block comprises the following steps:

and converting the non-ethernet service into a PCS coding block format, where the PCS coding block format is a format corresponding to a PCS coding block specified in the optical channel data unit ODUk.

That is, firstly, encoding conversion (for example, conversion from 8b/10b to 64b/66 b) is performed, the coding block format of the PCS is the same as that of the new ODU structure, and then overhead insertion is performed according to the step of step S102 to implement mapping of the ODUk.

In this embodiment, if the service to be transmitted is a service of an ethernet service type, the step of mapping the converted service to be transmitted to an optical channel data unit further includes: and carrying out speed regulation processing on the data stream transmitted by the service to be transmitted in a mode of deleting or increasing the inter-packet gap (IPG) between the data streams or part of control characters.

In practical application, whether to execute speed regulation processing or not may be selected according to actual requirements, if the client service does not need to be speed regulated, packet gaps are not deleted in the step process of executing steps S101 to S102, and if the speed regulation is needed, before the step of mapping the converted service to be transmitted to the optical channel data unit in the step process of converting the optical channel data unit, packet gaps IPG in a data stream are deleted or part of control characters in the data stream are controlled, so that the speed regulation operation is realized, and finally the speed regulated service is mapped to an ODUk.

In practical application, when an ODUk is mapped according to a rule that overheads of a fixed number N of PCS coding blocks are inserted every other fixed number M of PCS coding blocks, if an optical channel payload unit of a service includes p × M PCS coding blocks, overheads of p × N PCS coding blocks should be inserted, thereby forming a new optical channel data unit ODUk.

The payload area size of the new ODUk (i.e. the optical channel data unit ODUk) is p × M, the overhead area size is p × N, and the overhead ratio is N/(M + N). The determination of the ratio of N and M is related to the rate of the client service, for the client service with a higher rate, a lower overhead insertion ratio can be selected, for the client service with a lower rate, the overhead insertion ratio is higher, the determination of the ratio is calculated according to the actual needs of the service, and the method mainly aims to perform alarm detection on enough new ODUs within a fixed time so as to perform protection switching within a specified time and ensure that the rate of the new ODUk meets the rate requirement of the client service. For example, within 3ms, 30 new ODUk are needed, so that it can be determined whether there is an alarm such as LOF (Loss Of Frame), and the LOF alarm may cause protection switching, which requires time.

For the new ODUk, the overhead of N PCS-based coding blocks may or may not be continuous in the payload of M PCS coding blocks. For example, the overhead of N PCS coding blocks is stored in the payload of M PCS coding blocks on average.

In this embodiment, the ODUk structure may be configured in a row-column structure, or in a data stream structure, and when the ODUk structure is configured in a row-column structure and the overhead part is inserted in a continuous insertion manner, as shown in fig. 5 and 6; when the data stream structure arrangement is used and the break pin portion is inserted in a discontinuous insertion manner, as shown in fig. 7 and 8.

The ODUk obtained by the service transmission method provided in this embodiment is a brand new ODUk structure, and the ODUk structure is designed based on an ethernet PCS coding block, and the fixed period insertion is based on a PCS coding block ODU overhead. The ODU structure has a complete OAM function, the OAM function refers to Operation, management and Maintenance (OAM), OAM is called for short, meanwhile, based on the structural design of the Ethernet PCS coding block, hardware is enabled to be simpler to realize, meanwhile, various types of transcoding processing are facilitated, the purpose of compressing the rate is achieved, and meanwhile, the consumption of transmission power consumption of equipment can be reduced.

Example two:

a detailed description is given below to a service transmission method provided by the embodiment of the present invention with reference to specific service types, as shown in fig. 2 and 11, fig. 11 is a schematic diagram of a 5G forwarding scenario, interfaces of a 5G wireless device and an OTN device are ethernet-based eCPRI interfaces, each base station outputs 3 eCPRI interfaces, each eCPRI interface has a bandwidth of 25GE, and the following describes specific steps of mapping 25GE eCPRI to a new ODUk (i.e., the above ODUk) as follows:

s201: and the OTN equipment acquires the 25GE Ethernet data stream from an interface with the wireless equipment, frames the 25GE Ethernet data stream, removes FEC, removes CWM and the like, and recovers the data stream based on 66b blocks.

S202: and carrying out speed regulation processing on the data stream based on the 66b block by deleting the inter-packet gap IPG or partially controlling the block stream.

S203: the overhead insertion operation is performed on the processed 66b block.

In this step, specifically, according to the transmission rate requirement of the ethernet data stream of 25GE, the ratio of the overhead part to the payload part is determined, and the number of the overhead parts to be inserted is determined according to the ratio, for example, the overhead of 2 66b blocks is inserted every 476 66b blocks, that is, the ratio of the payload of the ODUk to the ODUk is 238/239 ═ 2/(2+476), and the overhead of the 2 66b blocks is evenly distributed in the overhead, or may be continuously inserted in 478 66b blocks.

In practical applications, if the ODUk includes 4 × 478 66b blocks in total, the overhead portion to be inserted is 4 × 2 66b block overhead.

S204: after inserting 4 × 2 66b block overheads, a new ODUk structure is formed, which is based on 66b blocks and adopts a representation of 4 × 478, as shown in fig. 9 (row-column structure).

S205: and mapping the new ODUk to an interface of a line crossing of the OTN equipment, and sending out the new ODUk through the line crossing.

S206: and the receiving end de-maps and recovers a new ODUk from the interface frame, performs framing and corresponding monitoring and maintenance information processing on the new ODUk through overhead, and deletes the overhead.

S207: and performing FEC encoding, CWM insertion and other processing on the 66b data stream with the overhead removed to recover the original client service.

In this embodiment, if the interfaces of the 4G wireless device and the OTN device are based on CPRI7 interfaces of 8b/10b, each base station outputs 3 CPRI7 interfaces, and the bandwidth of each CPRI7 interface is about 10G, the specific steps of mapping the 10G CPRI7 to a new ODUk are as follows:

step 1, the OTN device acquires a 10G data stream based on 8b/10b coding from an interface with the wireless device, and performs coding conversion from 8b/10b to 64b/66b on the data stream to form a data stream based on 66b blocks.

Step

2,2 overheads of 66b blocks are inserted every 952 66b blocks, that is, the ratio of the payload of the ODUk to the ODUk is 476/477, and the 2 overheads of 66b blocks are stored continuously.

Step 3, according to the method of step 2, after inserting 4 × 2 overhead blocks of 66b, a new ODUk is formed, where the ODUk is based on the 66b blocks and adopts a representation mode of 1 × 3816, as shown in fig. 10 (data flow structure)

And 4, mapping the new ODUk to an interface of a line crossing of the OTN equipment, and sending out the new ODUk through the line crossing.

And step 5, the receiving end de-maps and recovers a new ODUk from the interface, frames the new ODUk through overhead and processes corresponding monitoring and maintenance information, and the overhead is deleted.

And 6, processing the data stream 66b with the overhead removed from 64b/66b to 8b/10b to restore the original customer service.

In this embodiment, if the interface between the dedicated line device and the OTN device is an STM-64 interface, the specific implementation steps of mapping the STM-64 service to a new ODUk are as follows

And step 11, acquiring the STM-64 data stream from an interface of the OTN equipment and the private line equipment, and forming the data stream based on the 66b block by adopting a method of adding a 2-bit synchronous head to each 8 bytes of the STM-64 data stream.

Step 12, 2 overheads of 66b blocks are inserted every 476 66b blocks, that is, the ratio of the payload of the ODUk to the ODUk is 238/239, and the 2 overheads of 66b blocks are continuously stored.

Step 13, according to the method in step 12, after 2 × 2 66b block overheads are inserted, a new ODU is formed, and the ODUk adopts a representation mode of 2 × 478.

And step 14, mapping the new ODUk to an interface of a line intersection of the OTN equipment, and sending the new ODUk out through the line intersection.

Step 15, the receiving end de-maps and recovers a new ODU from the interface, performs framing and corresponding monitoring and maintenance information processing on the new ODUk through overhead, and deletes the overhead.

And step 16, processing the data stream 66b with the overhead removed by 66b to 64b to restore the original customer service.

In this embodiment, if the interface between the dedicated line device and the OTN device is an STM-64 interface, the specific step of mapping the STM-64 service to a new ODUk is as follows:

step 21, the OTN device acquires an STM-64 data stream from an interface with the dedicated line device, and maps an STM-64 service to the ODU2 in a conventional manner.

Step 22, performing byte structure-based transcoding to the ODU2 based on a 66b block, that is, adding a 2-bit sync header every 8 bytes to form a new ODUk.

And step 23, mapping the new ODUk to an interface frame of the line intersection of the OTN device, and sending out the new ODUk through the line intersection.

And step 24, the receiving end de-maps and recovers a new ODUk from the interface, performs framing and corresponding monitoring and maintenance information processing on the new ODUk through overhead, and then transcodes the new ODUk to the byte-based conventional ODU.

Step 25, demapping the client service from the conventional ODUk.

In this embodiment, if the interface between the dedicated line device and the OTN device is a 10GE interface based on an ethernet, but the 10GE service falls to the ground only when reaching the far end, that is, the OTN device at the opposite end needs to perform ODU cross processing, the mapping from the 10GE dedicated line to a new ODUk specifically includes the following steps:

step 31, the OTN device acquires the ethernet data stream of 10GE from the interface with the private line device, and maps the ethernet data stream to the ODU2e according to a conventional mapping manner.

Step 32, add 2-bit sync header to ODU2e every 8 bytes to form a new ODUk based on 66b block.

And step 33, mapping the new ODUk to an interface frame of the line intersection of the OTN device, and sending out the new ODUk through the line intersection.

Step 34, the receiving end de-maps and recovers a new ODUk from the interface frame, fixes the new ODUk through overhead, and performs transcoding from 66b to 64b after the new ODUk is fixed, so as to recover the original ODU2 e.

Step 35, the original ODU2e is subjected to cross processing and sent to a further location.

The service transmission method provided by this embodiment obtains a new optical channel data unit through the conversion of the service transmission method, and the frame structure is designed according to the transmission rate required by the customer service, so that the hardware implementation in designing the optical transport network device is simpler based on the frame structure, and the transcoding processing of various types of services is also facilitated, thereby achieving the processing efficiency and transmission efficiency of high-speed compression service, and simultaneously reducing the consumption of the transmission power consumption of the device and the development cost of the device.

Example three:

the embodiment provides a service transmission apparatus, which can be applied to various optical transport network devices, and as shown in fig. 3, the apparatus includes: a mapping module 301 and a sending module 302, wherein:

a mapping module 301, configured to map the converted service to be transmitted to an optical channel data unit.

The service to be transmitted refers to a service based on a data stream format of a PCS coding block, that is, when an initial format of the service is not a PCS coding block, the data stream of the PCS coding block needs to be obtained through conversion, when the initial format of the service is the PCS coding block, the service to be transmitted is an original service, the PCS coding block includes at least one of 8b/10b and 64b/66b, in practical application, the PCS coding block may also be other combinations, and is not limited to the above 8b/10b and 64b/66b, that is, the coding block for realizing coding through a physical coding sublayer may all be a combination of 8b/10b and 64b/66b, that is, the coding block for realizing coding through a physical coding sublayer

In practical applications, the payload of the M PCS coding blocks and the overhead of the N PCS coding blocks can also be understood as the overhead of the payload of P × M PCS coding blocks and P × N PCS coding blocks in total, wherein P, N and M are positive integers greater than or equal to 1 and M is greater than N; here, the optical channel data unit should be understood as a new optical channel data unit ODUk obtained by the service transmission method provided by the embodiment of the present invention, rather than an existing ODUk.

A sending module 302, configured to send the optical channel data unit obtained by conversion by the mapping module 301 through a transmission interface.

In this embodiment, as shown in fig. 4, the apparatus further includes a determining module 303 and a converting module 304, where the two modules are mainly used to determine whether the service to be transmitted satisfies a condition, and when not, convert the service to be transmitted into a data stream format based on a PCS coding block, and when satisfying, directly use original format data; the service to be transmitted may be an ethernet type service or a non-ethernet service based on PCS coding block, and may even be other customer service types, etc.

Further, the determining module 303 is configured to determine whether the service to be transmitted is in a data stream format based on the PCS coding block, that is, determine whether the service type satisfies the PCS coding block;

the conversion module 304 is configured to convert the data stream format of the service to be transmitted into the data stream format based on the PCS coding block if the service to be transmitted is not the data stream format based on the PCS coding block;

and if the service to be transmitted is based on the data stream format of the PCS coding block, keeping the data stream format of the service to be transmitted unchanged.

In this embodiment, the mapping module 301 specifically includes a manner of setting a payload and an overhead according to the payload and the overhead in an M/N relationship:

In this embodiment, the mapping module 301 determines a ratio of payload to overhead according to the actual requirement of the service, and calculates the total size of the overhead to be inserted into the optical channel data unit.

In practical applications, if the service to be transmitted is an ethernet type service, the conversion module 304 is further configured to perform a series of processing on the ethernet type service to convert the ethernet type service into a data stream based on a specific PCS coding block format, where the series of processing includes at least one of data header AM alignment, forward error correction FEC removal, and descrambling.

In this embodiment, when mapping an optical channel data unit, the mapping module 301 stores the service to be transmitted in the payload of the optical channel data unit, and manages and maintains the optical channel data unit by inserting the overhead.

In this embodiment, for an ethernet type service, in the process of mapping the converted service to be transmitted to the optical channel data unit, the speed regulation may also be selected according to actual requirements, specifically, the speed regulation processing is performed on the data stream transmitted by the service to be transmitted in a manner of deleting or increasing the inter-packet gap IPG between the data streams or a part of control characters.

Or, the speed can be selected not to be regulated, and when the speed is not regulated, the service based on the PCS coding block is directly mapped into the ODUk, and the speed regulation processing is not needed in the middle.

If the service to be transmitted is a non-ethernet service based on a PCS coding block, the conversion module 304 is further configured to convert the non-ethernet service into a PCS coding block format, where the PCS coding block format is a format corresponding to a PCS coding block specified in the optical channel data unit.

In the service transmission apparatus provided in this embodiment, a service to be transmitted is converted into a data stream format based on PCS coding blocks, and the converted service to be transmitted is mapped into an optical channel data unit, where the optical channel data unit includes payloads of P multiplied by M PCS coding blocks and overheads of P multiplied by N PCS coding blocks, the overheads of P multiplied by N PCS coding blocks are increased in an M/N relationship according to the payloads and the overheads, and finally, an obtained optical channel data unit is sent out through a transmission interface, where the ODUk structure is designed based on ethernet PCS coding blocks, and a fixed period is inserted based on the overheads of PCS coding blocks. The ODU structure has a complete OAM function, the OAM function refers to Operation, management and Maintenance (OAM), OAM is called for short, meanwhile, based on the structural design of the Ethernet PCS coding block, hardware is enabled to be simpler to realize, meanwhile, various types of transcoding processing are facilitated, the purpose of compressing the rate is achieved, and meanwhile, the consumption of transmission power consumption of equipment can be reduced.

Example four:

the present embodiment provides an optical transport network device, and as shown in fig. 12, a processor 401, a memory 402, a communication bus 403;

the communication bus 403 is used for realizing communication connection between the processor 401 and the memory 402;

processor 401 is configured to execute one or more programs stored in memory 402 to implement the steps of:

mapping a service to be transmitted into an optical channel data unit, wherein the optical channel data unit comprises payloads of M PCS coding blocks and overheads of N PCS coding blocks; n and M are positive integers greater than or equal to 1, M is greater than N, the coding blocks comprise at least one of 8b/10b and 64b/66b, and in practical application, the PCS coding blocks can also be other combinations;

In this embodiment, the payload of the M PCS coding blocks and the overhead of the N PCS coding blocks are combined by at least one of the following ways:

mode 1, continuously storing the overhead of the N PCS coding blocks into the payload of the M PCS coding blocks;

and 2, discontinuously storing the overhead of the N PCS coding blocks into the payloads of the M PCS-based coding blocks.

As for the mode 2, in a discontinuous setting, the overhead of the N PCS coding blocks may be stored in the payload of the M PCS coding blocks on average.

In this embodiment, before the processor 401 performs the step of mapping the service to be transmitted into the optical channel data unit, the processor further performs the following steps:

determining whether the service to be transmitted is in a data stream format based on the PCS coding block, namely judging whether the type of the service meets the data stream format of the PCS coding block;

The step of mapping the service to be transmitted to the optical channel data unit is specifically realized by the following method: and storing the service to be transmitted into the payload of the optical channel data unit, and managing and maintaining the optical channel data unit by inserting the overhead.

In this embodiment, when the processor 401 executes a program to implement a function of mapping a service to be transmitted to the optical channel data unit according to a payload and an overhead in an M/N relationship, the function may specifically be implemented by the following steps:

The payload area size of the new ODUk is p × M, the overhead area size is p × N, and the overhead ratio is N/(M + N). Wherein N and M are positive integers greater than or equal to 1, M is greater than N, and p is a positive integer greater than or equal to 1. The determination of the ratio of N and M is related to the rate of the client service, for the client service with a higher rate, a lower overhead insertion ratio can be selected, and for the client service with a lower rate, the overhead insertion ratio is higher. For example, within 3ms, 30 new ODUs are needed, so that it can be determined whether there is an alarm such as LOF (Loss Of Frame), where the LOF alarm may cause protection switching, and the protection switching has a requirement on time.

For the new ODU, the overhead of N PCS-based coding blocks may or may not be continuous in the payload of M PCS-based coding blocks. For example, the overhead of N PCS-based coding blocks is stored in the payload of M PCS-based coding blocks on average, and the specific structure is shown in fig. 5-8.

In this embodiment, if the service to be transmitted is an ethernet type service, before the converting the optical channel payload unit mapped with the service to be transmitted into the optical channel data unit according to the transmission rate, the method further includes: and performing series processing on the Ethernet type service to convert the Ethernet type service into a data stream based on a specific PCS coding block format, wherein the series processing comprises at least one of data header AM alignment, forward error correction code FEC removal and descrambling.

That is, a data stream based on a specific PCS coding block format (e.g., 66b/257b, etc.) is recovered through a series of processing (AM alignment, FEC removal, descrambling, etc.), optionally, the data stream may be subjected to speed regulation processing by deleting IPG or a part of control characters between the data streams, then, according to a proportional relationship that N overheads based on PCS coding blocks are inserted every M PCS coding blocks, overheads are inserted, N overheads inserted for M PCS coding blocks in an ODUk payload may be continuously stored or may not be continuous in an ODUk, that is, N overheads are distributed in M PCS coding blocks, and a new ODUk structure is formed after p × N overheads are inserted, where the ODUk structure may be represented in a data stream form or in a row-column structure form.

In this embodiment, if the service to be transmitted is a non-ethernet service based on a PCS coding block, before converting the optical channel payload unit mapped with the service to be transmitted into the optical channel data unit according to the transmission rate, the method further includes: and converting the non-Ethernet service into a PCS coding block format, wherein the PCS coding block format is a format corresponding to a PCS coding block specified in the optical channel data unit.

That is, firstly, performing code conversion (for example, conversion from 8b/10b to 64b/66 b), and having the same PCS coding block format as the new ODU structure, then inserting N overheads based on the PCS coding block overheads every M PCS coding blocks, where the N overheads inserted for the M PCS coding blocks in the ODUk payload may be continuously stored or may not be continuous in the ODUk, that is, the N overheads are distributed in the M PCS coding blocks, and a new ODUk structure is formed after inserting p × N overheads, where the ODUk structure may be represented in a data stream form or in an expression form of a row-column structure.

In this embodiment, the service to be transmitted may be service types in other formats in addition to two service types, namely, an ethernet type service and a non-ethernet service based on a PCS coding block, and the specific steps of the processing method for other service types are as follows:

firstly, transcoding a client service to form a data stream based on PCS coding blocks, then inserting overheads according to a proportional relation that N overheads based on PCS coding blocks are inserted into every M PCS coding blocks, wherein the N overheads inserted into M PCS coding blocks in an ODU payload can be continuously stored or not, namely the N overheads are distributed in the M PCS coding blocks, and a new ODUk structure is formed after p × N overheads are inserted, and the ODUk structure can be represented in a data stream mode or in a row-column structure mode.

Or mapping to a conventional ODU in a conventional manner, where the ODUk is based on a byte format, and then performing transcoding (for example, operations such as adding a sync header to a plurality of consecutive bytes) of the conventional ODUk based on a PCS coding block to form a new ODUk structure.

For the case that the ODUk interworking is to be based on the ODUk interworking and the ODUk carries the ethernet service, although the ethernet data stream based on the PCS coding block (for example, 66b block) is carried in the ODUk payload, the data stream based on the PCS coding block in the ODUk payload is not identified, that is, the service is mapped to the conventional byte-based ODUk in the conventional manner, and then the conventional ODUk is transcoded based on the PCS coding block (for example, operations such as adding a sync header to a plurality of bytes continuously, and the like), so as to form a new ODUk structure.

Accordingly, embodiments of the present invention also provide a computer-readable storage medium including volatile or non-volatile, removable or non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, computer program modules or other data. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact disk Read-Only Memory), Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

The computer-readable storage medium in this embodiment may be used to store one or more computer programs, and the stored one or more computer programs may be executed by a processor to implement at least one step of the service transmission method in the foregoing embodiment one or embodiment two.

The present embodiment also provides a computer program, which may be distributed on a computer readable medium and executed by a computing device to implement at least one step of the service transmission method in the first or second embodiment, and in some cases, at least one step shown or described may be executed in a different order than that described in the above embodiments.

The present embodiment also provides a computer program product, which includes a computer readable device, where the computer readable device stores thereon the computer program as shown above, and in the present embodiment, the computer readable device may include the computer readable storage medium as shown above.

To sum up, the service transmission method and apparatus provided in the embodiments of the present invention, an optical transport network device, and a storage medium convert a service to be transmitted into a data stream format based on PCS coding blocks, map the converted service to be transmitted into an optical channel data unit, where the optical channel data unit includes a payload of P times M PCS coding blocks and a cost of P times N PCS coding blocks, where the cost of P times N PCS coding blocks is increased according to a relationship between the payload and the cost by M/N, and finally send out an obtained optical channel data unit through a transmission interface, so as to obtain a new optical channel data unit through such a mapping manner, and the structure is designed according to a transmission requirement required by a client service, and based on such a structure, hardware implementation in designing the optical transport network device is simpler, and transcoding processing of various types of services is facilitated, therefore, the processing efficiency and the transmission efficiency of the high-speed compression service are achieved, the transmission power consumption of the equipment is reduced, and the development cost of the equipment is reduced.

It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.

In addition, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.

The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims

1. A service transmission method comprises the following steps:

mapping a service to be transmitted into an optical channel data unit, wherein the optical channel data unit comprises a payload and an overhead, and the ratio of the number of PCS (personal communications System) coding blocks included in the payload to the number of PCS coding blocks included in the overhead is M/N; wherein N and M are positive integers greater than or equal to 1 and M is greater than N;

2. The traffic transmission method of claim 1, wherein the PCS coding block includes at least one of 8b/10b, 64b/66 b.

3. The traffic transmission method according to claim 1, wherein the mapping the traffic to be transmitted to the optical channel data unit includes storing the traffic to be transmitted in a payload of the optical channel data unit, and performing management and maintenance on the optical channel data unit by inserting the overhead.

4. The traffic transmission method according to claim 1, wherein the method further comprises:

determining whether the service to be transmitted is in a data stream format based on a PCS coding block;

if the service to be transmitted is not in the data stream format based on the PCS coding block, converting the data stream format of the service to be transmitted into the data stream format based on the PCS coding block;

5. The traffic transmission method according to claim 4, wherein the payload of the M PCS coding blocks and the overhead of the N PCS coding blocks are combined by at least one of:

or discontinuously storing the overhead of the N PCS coding blocks into the payload of the M PCS coding blocks.

6. The traffic transmission method of claim 5, wherein the discontinuous depositing of the overhead of the N PCS coding blocks into the payload of the M PCS coding blocks comprises: and averagely storing the overhead of the N PCS coding blocks into the payloads of the M PCS coding blocks.

7. The service transmission method according to claim 3, wherein if the service to be transmitted is a service of an ethernet service type, the step of mapping the converted service to be transmitted into an optical channel data unit further includes: and carrying out speed regulation processing on the data stream transmitted by the service to be transmitted in a mode of deleting or increasing the inter-packet gap (IPG) between the data streams or part of control characters.

8. A traffic transmission apparatus, comprising:

the device comprises a mapping module, a data unit and a control module, wherein the mapping module is used for mapping a service to be transmitted into an optical channel data unit, the optical channel data unit comprises a payload and an overhead, and the ratio of the number of PCS (personal communications systems) coding blocks included in the payload to the number of PCS coding blocks included in the overhead is M/N; wherein N and M are positive integers greater than or equal to 1 and M is greater than N;

9. The traffic transmission apparatus according to claim 8, wherein the mapping module is configured to store the traffic to be transmitted in a payload of the optical channel data unit, and perform management and maintenance on the optical channel data unit by inserting the overhead.

10. The traffic transmitting device according to claim 8, wherein the traffic transmitting device further comprises a judging module and a converting module, wherein:

the judging module is used for determining whether the service to be transmitted is in a data stream format based on the PCS coding block;

the conversion module is used for converting the data stream format of the service to be transmitted into the data stream format based on the PCS coding block when the judgment module judges that the service to be transmitted is not the data stream format based on the PCS coding block; and when the judging module judges that the service to be transmitted is based on the data stream format of the PCS coding block, keeping the data stream format of the service to be transmitted unchanged.

11. The traffic transmitting device of claim 10, wherein the mapping module continuously stores the overhead for the N PCS coding blocks in the payload of the M PCS coding blocks; or the overhead of the N PCS coding blocks is not continuously stored in the payload of the M PCS coding blocks.

12. The service transmission apparatus according to claim 10, wherein if the service to be transmitted is an ethernet service type service, the conversion module is configured to perform speed adjustment processing on the data stream transmitted by the service to be transmitted by deleting or increasing an inter-packet gap IPG or a part of control characters between the data streams.

13. An optical transport network device comprising a processor, a memory and a communication bus;

the processor is configured to execute one or more programs stored in the memory to implement the steps of the traffic transmission method according to any of claims 1 to 7.

14. A computer readable storage medium storing one or more computer programs, the one or more computer programs being executable by one or more processors to implement the steps of the traffic transmission method as claimed in any one of claims 1 to 7.