阅读说明：本技术 映射开销传送/接收方法、装置、otn设备及存储介质 (Mapping overhead transmitting/receiving method, device, OTN equipment and storage medium ) 是由 张源斌 苑岩 于 2018-08-13 设计创作，主要内容包括：本发明实施例提供一种映射开销传送/接收方法、装置、OTN设备及存储介质，通过按照通用映射规程，将光通道数据单元映射至光传送网接口帧的服务信号帧净荷区；将通用映射规程的映射开销填充至服务信号帧净荷区；将光传送网接口帧传送出去。从而在未来降低服务信号帧的开销部分的占比的情况下，可以保证映射开销在服务信号帧中的存放，保证业务的顺利传送。(The embodiment of the invention provides a mapping overhead transmitting/receiving method, a device, an OTN device and a storage medium, wherein an optical channel data unit is mapped to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure; filling the mapping overhead of the general mapping procedure into a payload area of a service signal frame; and transmitting the optical transmission network interface frame. Therefore, under the condition of reducing the occupation ratio of the overhead part of the service signal frame in the future, the storage of mapping overhead in the service signal frame can be ensured, and the smooth transmission of services is ensured.)

1. A mapping overhead transport method, comprising:

mapping the optical channel data unit to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure;

padding a mapping overhead of the generic mapping procedure to the service signal frame payload region;

and transmitting the optical transmission network interface frame.

2. The mapping overhead transport method of claim 1, wherein the service signal frame payload area is comprised of data blocks, the data blocks including padding data blocks and traffic data blocks, and wherein mapping the optical channel data units to the service signal frame payload area of the optical transport network interface frame comprises:

and mapping the optical channel data unit to the service data block in the service signal frame payload area of the optical transport network interface frame.

3. The mapping overhead transmission method of claim 2, wherein the padding of the mapping overhead of the generic mapping procedure to the service signal frame payload region comprises:

and filling the mapping overhead of the general mapping procedure into one or N filling data blocks of the payload area of the service signal frame, wherein N is an integer greater than 1.

4. The mapping overhead transmission method of claim 3, wherein the padding of the mapping overhead of the generic mapping procedure into one or N of the padding data blocks of the service signal frame payload region comprises:

padding mapping overhead of the generic mapping procedure into a first of the padding data blocks of the service signal frame payload region;

or, the mapping overhead of the general mapping procedure is filled into the region formed by the first N filling data blocks of the payload region of the service signal frame.

5. The mapping overhead transmission method of any of claims 1 to 4, wherein the padding of the mapping overhead of the generic mapping procedure to the service signal frame payload region comprises:

and after checking and/or forward error correction coding the mapping overhead of the general mapping procedure, filling the mapping overhead into the payload area of the service signal frame.

6. A mapping overhead receiving method, comprising:

receiving an optical transport network interface frame;

acquiring the mapping overhead of a general mapping procedure from a service signal frame payload area of the optical transport network interface frame;

and carrying out demapping processing according to the general mapping procedure.

7. The map overhead receiving method of claim 6, wherein the service signal frame payload area is comprised of data blocks, the data blocks including a padding data block and a traffic data block; the demapping according to the general mapping procedure includes:

and carrying out demapping processing according to the general mapping procedure, and acquiring an optical channel data unit from the service data block.

8. The mapping overhead receiving method of claim 7, wherein the obtaining of the mapping overhead of the generic mapping procedure from the service signal frame payload region of the optical transport network interface frame comprises:

and acquiring the mapping overhead of a general mapping procedure from one or N padding data blocks in a payload area of a service signal frame of the optical transport network interface frame, wherein N is an integer greater than 1.

9. The mapping overhead receiving method of claim 8, wherein the obtaining the mapping overhead of the generic mapping procedure from one or N of the padding data blocks of the payload region of the service signal frame of the optical transport network interface frame comprises:

acquiring mapping overhead of a general mapping procedure from a first padding data block in a payload area of a service signal frame of the optical transport network interface frame;

or, obtaining the mapping overhead of the general mapping procedure from the region formed by the first N filling data blocks in the payload region of the service signal frame of the optical transport network interface frame.

10. The mapping overhead receiving method according to any of claims 6 to 9, further comprising, before performing demapping processing according to the general mapping procedure:

and carrying out checking processing and/or forward error correction decoding processing on the mapping overhead.

11. A mapping overhead transmitting apparatus, comprising:

the mapping module is used for mapping the optical channel data unit to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure;

a padding module for padding the mapping overhead of the generic mapping procedure into the service signal frame payload region;

and the transmission module is used for transmitting the optical transmission network interface frame.

12. A mapping overhead receiving apparatus, comprising:

the receiving module is used for receiving the optical transport network interface frame;

an obtaining module, configured to obtain a mapping overhead of a general mapping procedure from a service signal frame payload area of the otn interface frame;

and the demapping module is used for performing demapping processing according to the general mapping procedure.

13. An optical transport network device comprising 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 mapping overhead transmission method according to any one of claims 1 to 5 or the steps of the mapping overhead reception method according to any one of claims 6 to 10.

14. A computer readable storage medium, characterized in that the computer readable storage medium stores one or more programs which are executable by one or more processors to implement the steps of the mapping overhead transmission method according to any one of claims 1 to 5 or the steps of the mapping overhead reception method according to any one of claims 6 to 10.

Technical Field

The present invention relates to the field of communications, and in particular, to a mapping overhead transmitting/receiving method, apparatus, OTN device, and storage medium.

Background

An Optical Transport Network (OTN) standard is established by the International telecommunications Union (ITU-T), which 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.

In the definition of optical transport network signals in the related art, client service data is mapped to obtain an OTN interface frame, wherein the amount of client service data embodied in the form of mapping overhead is stored in an overhead portion of a service signal frame of the OTN interface frame, and a proportionality coefficient between a service signal frame and a payload portion of the service signal frame is at a higher ratio, so that a requirement for storing mapping overhead in the overhead portion of the service signal frame can be met, and the proportionality coefficient may be adjusted in the future to achieve a goal of reducing a line interface rate, so that the proportion of the overhead portion of the service signal frame is reduced, and at this time, bandwidth resources of the overhead portion are contracted, and further, the mapping overhead cannot be stored in the overhead portion of the service signal frame due to insufficient bandwidth resources.

Disclosure of Invention

The mapping overhead transmitting/receiving method, the device, the OTN equipment and the storage medium provided by the embodiment of the invention aim to solve the problem that mapping overhead cannot be stored in an overhead part of a service signal frame due to the fact that the occupation ratio of the overhead part of the service signal frame is reduced for reducing the line interface rate in the related technology.

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

mapping the optical channel data unit to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure;

filling the mapping overhead of the general mapping procedure into a payload area of a service signal frame;

and transmitting the optical transmission network interface frame.

The embodiment of the invention also provides a mapping overhead receiving method, which comprises the following steps:

receiving an optical transport network interface frame;

acquiring the mapping overhead of the general mapping procedure from a service signal frame payload area of an optical transport network interface frame;

and carrying out demapping processing according to a general mapping procedure.

The embodiment of the present invention further provides a mapping overhead transmitting apparatus, including:

the mapping module is used for mapping the optical channel data unit to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure;

a stuffing module for stuffing the mapping overhead of the general mapping procedure to a service signal frame payload region;

and the transmission module is used for transmitting the optical transmission network interface frame.

The embodiment of the present invention further provides a mapping overhead receiving apparatus, including:

the receiving module is used for receiving the optical transport network interface frame;

the acquisition module is used for acquiring the mapping overhead of the general mapping procedure from a service signal frame payload area of an optical transport network interface frame;

and the demapping module is used for performing demapping processing according to the general mapping procedure.

The embodiment of the invention also provides optical transport network equipment, which comprises 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 mapping overhead transmission method as claimed in any one of the above, or the steps of the mapping overhead reception method as claimed in any one of the above.

Embodiments of the present invention also provide a computer-readable storage medium, where one or more programs are stored, and the one or more programs may be executed by one or more processors to implement the steps of the mapping overhead transmission method according to any one of the above items or the steps of the mapping overhead reception method according to any one of the above items.

The invention has the beneficial effects that:

the embodiment of the invention provides a mapping overhead transmitting/receiving method, a device, an OTN device and a storage medium, wherein an optical channel data unit is mapped to a service signal frame payload area of an optical transport network interface frame according to a general mapping procedure; filling the mapping overhead of the general mapping procedure into a payload area of a service signal frame; and transmitting the optical transmission network interface frame. Therefore, under the condition of reducing the occupation ratio of the overhead part of the service signal frame in the future, the storage of mapping overhead in the service signal frame can be ensured, and the smooth transmission of services is ensured.

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 flowchart of a mapping overhead transmission method according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of an OTN interface frame provided in the first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a service signal frame provided in the first embodiment of the present invention;

fig. 4 is a flowchart of a mapping overhead receiving method according to a second embodiment of the present invention;

fig. 5 is a schematic diagram of a service transmission scenario provided in the third embodiment of the present invention;

fig. 6 is a flowchart of a customer service data interaction method provided in the third embodiment of the present invention;

fig. 7 is a schematic structural diagram of an OTN interface frame provided in the third embodiment of the present invention;

fig. 8 is a schematic structural diagram of a service signal frame provided in the third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a communication system according to a fourth embodiment of the present invention;

fig. 10 is a schematic structural diagram of a mapping overhead transmitting apparatus according to a fourth embodiment of the present invention;

fig. 11 is a schematic structural diagram of a mapping overhead receiving apparatus according to a fourth embodiment of the present invention;

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

Detailed Description

The Optical transport network has its standard signal format, including an Optical channel transport Unit (OTUk, Optical channel transport Unit-k, k ═ 1,2,3,4), a flexible interconnect interface FlexO, and a new Optical transport network signal defined in the future. The Optical transport network signal is used for carrying various non-OTN signals or multiple low-speed Optical Channel Data Unit (ODUi, Optical Channel Data Unit-i, i ═ 0,1,2,2e,3,4, flex) signals, and the ODUi rate is lower than the Optical Channel Data Unit (ODUk, Optical Channel Data Unit-k), and then the low-speed ODUi (i < k) signal is used to represent the ODUi signal with a lower rate than the ODUk rate; the non-OTN signal refers to various other signals besides the optical transmission network signal, such as a Synchronous Digital Hierarchy Signal (SDH), an Ethernet signal (Ethernet), a Fibre channel signal (Fibre channel), various Packet signals, and the like.

The optical transport network signal includes two parts of an overhead and a payload, and the following takes OTUk as an example to further describe the constituent parts of the optical transport network signal. The OTUk signal is composed of OTUk, a remaining portion of the OTUk after removing the overhead of the OTUk is called an optical channel data Unit ODUk, a remaining portion of the ODUk after removing the overhead of the ODUk is called an optical channel Payload Unit OPUk (optical channel Payload Unit-k), a remaining portion of the OPUk after removing the overhead of the OPUk is called an OPUk Payload, the OPUk Payload can be used for carrying a non-OTN signal or a plurality of low-speed ODUi (i < k) signals, and a signal composed of ODUk is called an ODUk signal.

The Mapping method currently used for loading the non-OTN signal into the OPUk payload mainly includes Asynchronous Mapping Procedure (AMP), Bit-synchronous Mapping Procedure (BMP), and General Mapping Procedure (GMP), where the use of BMP has a great limitation, i.e., OTUk and non-OTN signal rates are required to be completely synchronized and the rate ratio value conforms to a specific relationship, and the AMP and GMP do not require the OTUk and non-OTN signal rate to be synchronized, especially GMP, non-OTN signal or low-speed ODUi signal (i < k) to be loaded into OTUk. For Packet signals in non-OTN signals, the existing optical transport network signal definition specifies that various Packet signals are mapped into oduflex (GFP) by Generic Framing procedure (GFP-F) and then into the time slots of OPUk.

According to the current standard, the GMP mapping overhead needs to occupy 6 bytes, the 6 bytes are stored in the overhead part of the OPU, the scaling factor of the current ODU and ODU payload is 239/238, the overhead proportion is about 0.4%, and the scaling factor is at a higher proportion, and in the future, the scaling factor may be adjusted to achieve the purpose of reducing the line interface rate, so that the overhead proportion is reduced, the bandwidth resource of the overhead part will shrink at this time, and the GMP mapping overhead occupies 6 bytes, which may cause the situation that the mapping overhead cannot be stored due to insufficient bandwidth.

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.