WO2017118042A1

WO2017118042A1 - Method and apparatus for determining channel state

Info

Publication number: WO2017118042A1
Application number: PCT/CN2016/096235
Authority: WO
Inventors: 程炜; 赵刚
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-01-04
Filing date: 2016-08-22
Publication date: 2017-07-13
Also published as: CN106941388B; CN106941388A

Abstract

A method and apparatus for determining a channel state. The method comprises: comparing payload data of a payload region of a pre-set first frame in the current transmission frame with payload data of a payload region of a pre-set second frame in the previous transmission frame, wherein a position of the first frame in the current transmission frame corresponds to a position of the second frame in the previous transmission frame; and where a comparison result is that the payload data of the payload region of the first frame is the same as the payload data of the payload region of the second frame, determining that a state of a channel for transmitting the first frame is a state without bearing a service.

Description

Method and device for determining channel state

Technical field

This document relates to, but is not limited to, the field of communications, and in particular, to a method and apparatus for determining a channel state.

Background technique

With the development of communication, the information required to be transmitted is not only voice, but also text, data, images and video. In addition to the development of digital communication and computer technology, T1 (DS1) appeared in the 70s and 80s. Pulse code modulation) or E1 (30-channel pulse code modulation) carrier system (1.544 or 2.048 Mbps), X.25 frame relay, Integrated Services Digital Network (ISDN) and fiber-optic distributed data interface ( Fiber Distributing Data Interface (FDDI) and other network technologies. With the advent of the information society, people hope that modern information transmission networks can provide a variety of circuits and services quickly, economically and efficiently. The above-mentioned network technologies are only in the original due to the monotonicity of their services, the complexity of expansion, and the limitations of bandwidth. It is useless to modify or improve within the framework. The Synchronous Digital Hierarchy (SDH) technology was developed in this context.

Among a variety of broadband fiber access network technologies, access network systems using SDH technology are the most commonly used. The birth of SDH solves the problem of access bottleneck between users and the core network due to the bandwidth of the home media cannot keep up with the development of the backbone network and user service requirements, and at the same time improves the utilization of a large amount of bandwidth on the transmission network. rate. Since its introduction in the 1990s, SDH technology has become a mature, standard technology that has been widely adopted in backbone networks and at a lower price. Application in the access network can bring the huge bandwidth advantages and technical advantages of SDH technology in the core network into the access network field, and can fully utilize SDH synchronous multiplexing, standardized optical interfaces, powerful network management capabilities, and flexible network topology. The advantages of capacity and high reliability make the access network benefit in the long-term development of construction.

The information structure level adopted by SDH is called Synchronous Transport Module level n (N=1, 4, 16, 64, referred to as STM-N). The most basic module is STM-1, and four STM- 1 Synchronous multiplexing constitutes STM-4, 16 STM-1 or four STM-4 synchronous multiplexing constitutes STM-16, four STM-16 synchronous multiplexing constitutes STM-64, and even four STM-64 synchronous complex Used to form STM-256. SDH uses a block-like frame structure to carry information. Each frame consists of 9 lines in the vertical direction and 270×N columns in the horizontal direction. Each byte contains 8 bits. The entire frame structure is divided into segment overheads (Section OverHead, referred to as SOH) area, STM-N payload area and management unit pointer (AU PTR) area, the section overhead area is mainly used for network operation, management, maintenance and assignment to ensure that information can be transmitted normally and flexibly. It is further divided into Regenerator Section OverHead (RSOH) and Multiplex Section OverHead (MSOH); the payload area is used to store bits for information services and a small amount for channel maintenance. The managed channel overhead byte; the management unit pointer is used to indicate the exact location of the first byte of information in the payload area within the STM-N frame so that the payload can be correctly separated upon reception.

An Optical Transport Network (OTN) is another network that coexists with SDH. Compared with SDH, OTN has strong networking capabilities, good scalability, supports multiple upper-layer services or protocols, and completely transparent transmission of customer signals, and provides multi-level serial connection monitoring (Tandem Connection Monitor, referred to as For TCM) function and stronger forward error correction capability, OTN can also provide the same high bandwidth as Wavelength Division Multiplexing (WDM). Therefore, OTN will become the next generation transmission network, especially the main networking technology of the backbone layer. In terms of power domain, OTN not only absorbs the technical advantages of SDH, but also expands new functions. Based on the cross-functional function of Optical Channel Data Unit-k (ODUK), the circuit switching granularity is improved from 155M of SDH to 2.5G, 10G, and 40G, thereby achieving flexible scheduling and protection of large-particle services, and also supporting Forward Error Correction (FEC), which supports cascading monitoring of multi-layer and multi-domain networks, adopts asynchronous mapping and multiplexing, does not require network synchronization, and uses the most critical crossovers. Economic air separation technology. OTN is compatible with SDH and Asynchronous Transfer Mode (ATM) services. It can carry network protocol or Multi-Protocol Label Switching (IP/MPLS) and storage area network (Storage). Area Network, referred to as SAN), video (Video) and other large-granular businesses.

In the transmission network, network structures such as OTN and SDH use block frames as transmission carriers. This block frame has a fixed frame length, and ONT and SDH can monitor high-order channels and low-order channels through channel overhead bytes. . However, in actual use, since some types of access devices may be accessed on the user side, but the user services are not actually accessed, the overhead in the OTN or SDH frames is Normal, but the channel is not actually used and the payload is empty. It is often difficult for operators to grasp the use of the channel, especially the use of low-order channels, resulting in wasted channels.

In view of the problem that the operator in the related art is difficult to accurately know the use of the channel and the channel is wasted, no solution has been proposed yet.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiment of the invention provides a method and a device for determining a channel state, which can accurately know the usage of the channel and reduce the waste of the channel.

An embodiment of the present invention provides a method for determining a channel state, including: saving payload data of a payload area of a first frame in a current transmission frame and a payload area of a payload area of a second frame in a previous transmission frame. Data comparison, wherein the last transmission frame is the transmission frame closest to the current transmission frame, the position of the first frame in the current transmission frame and the position of the second frame in the previous transmission frame Corresponding to; in the case where the comparison result is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, determining a channel for transmitting the first frame The status is un-beared business status.

Optionally, the method further includes: when the current transmission frame is a synchronous transmission module N-level STM-N frame, determining the first frame by: demultiplexing the STM-N frame into N STM-1 frames; determining one of the N STM-1 frames as the first frame.

Optionally, the method further includes determining a location of the payload area of the first frame by: determining a type of the first frame; determining, according to a type of the first frame, the first frame The location of the payload area.

Optionally, determining, according to the type of the first frame, a location of the payload area of the first frame includes at least one of the following: when the type of the first frame is a fourth-order management unit AU-4, Decoding the first frame to obtain a location of the management unit pointer AU-PTR in the first frame; determining a location of the AU-PTR as a location of a payload area of the first frame; when the first When the type of the frame is the third-order tributary unit TU-3, the first frame is parsed to obtain the third-order virtual in the first frame. a location of the container VC-3; determining a location of the VC-3 as a location of a payload area of the first frame; when the type of the first frame is a twelve-order tributary unit TU-12, The first frame is parsed to obtain the location of the twelve-order virtual container VC-12 in the first frame; and the location of the VC-12 is determined as the location of the payload area of the first frame.

Optionally, the method further includes: when the current transmission frame is an optical conversion unit OTU frame, determining a location of the payload area of the first frame by: positioning an overhead field according to a frame in a current transmission frame. The pointer in the determination determines the location of the payload area of the first frame.

Optionally, the method further includes: determining, when the current transmission frame is an OTU frame, a location of a payload area of the first frame by determining a mapping type of the first frame; The mapping type of the first frame determines the location of the payload area of the first frame.

Optionally, determining the location of the payload area of the first frame according to the mapping type of the first frame includes: when the mapping type of the first frame is a synchronization mapping, positioning the first according to a byte count Position of the payload area of the frame; when the mapping type of the first frame is asynchronous mapping, determining the location of the payload area of the first frame according to the positive adjustment byte and the negative adjustment byte.

An embodiment of the present invention further provides a channel status determining apparatus, including:

And a comparison module, configured to compare the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame, where the previous transmission frame is a transmission frame closest to the current transmission frame, the position of the first frame in the current transmission frame and the position of the second frame in the previous transmission frame;

a first determining module, configured to determine, when the comparison result of the comparison module is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame The state of the channel transmitting the first frame is an un-beared service state.

Optionally, the device further includes

The second determining module is configured to: when the current transmission frame is a synchronous transmission module N-level STM-N frame, determine the first frame by:

a first demultiplexing unit, configured to demultiplex the STM-N frame into N STM-1 frames;

a first determining unit, configured to determine that one of the N STM-1 frames is a STM-1 frame Said the first frame.

Optionally, the device further includes

The third determining module is configured to determine a location of the payload area of the first frame by:

a second determining unit, configured to determine a type of the first frame;

And a third determining unit, configured to determine a location of the payload area of the first frame according to the type of the first frame.

Optionally, the third determining unit includes at least one subunit:

a first determining subunit, configured to parse the first frame to obtain a management unit pointer AU-PTR in the first frame when the type of the first frame is a fourth-order management unit AU-4 a location; determining a location of the AU-PTR as a location of a payload area of the first frame;

a second determining subunit, configured to: when the type of the first frame is a third-order tributary unit TU-3, parse the first frame to obtain a third-order virtual container VC in the first frame Position of 3; determining a location of the VC-3 as a location of a payload area of the first frame;

a third determining subunit, configured to parse the first frame to obtain a twelve-order virtual container in the first frame when the type of the first frame is a twelve-order tributary unit TU-12 The location of the VC-12; determining the location of the VC-12 as the location of the payload area of the first frame.

Optionally, the apparatus further includes: a fourth determining module, configured to: when the current transmission frame is an OTU frame, determine a location of the payload area of the first frame by: a fourth determining unit, setting To determine the mapping type of the first frame, the fifth determining unit is configured to determine a location of the payload area of the first frame according to a mapping type of the first frame.

Optionally, the fifth determining unit includes: a positioning subunit, configured to: when the mapping type of the first frame is a synchronization mapping, locate a location of a payload area of the first frame according to a byte count; And determining a subunit, configured to determine a location of the payload area of the first frame according to the positive adjustment byte and the negative adjustment byte when the mapping type of the first frame is an asynchronous mapping.

Optionally, the device further includes

And a fifth determining module, configured to: when the current transmission frame is an OTU frame, determine a location of the payload area of the first frame according to a pointer in a frame positioning overhead field in the current transmission frame.

Embodiments of the present invention also provide a computer readable storage medium storing computer executable instructions for performing any of the methods described above.

According to the embodiment of the present invention, the payload data of the payload area of the first frame in the current transmission frame is compared with the payload data of the payload area of the second frame in the previous transmission frame, where the previous transmission is performed. The frame is a transmission frame that is closest to the current transmission frame, and the position of the first frame in the current transmission frame corresponds to the position of the second frame in the previous transmission frame; If the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, determining that the state of the channel used for transmitting the first frame is an un-beared service state The method of comparing whether the payload data of the first frame in the current transmission frame is the same as the frame payload data of the corresponding position in the previous transmission frame, determining the state of the channel transmitting the first frame, and accurately knowing the channel The use situation, thereby reducing the waste of the channel, thereby achieving the effect of improving the accuracy of the use of the learned channel.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flow chart of a method of determining a channel state according to an embodiment of the present invention;

2 is a block diagram showing the structure of a channel state determining apparatus according to an embodiment of the present invention;

3 is a block diagram 1 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention;

4 is a block diagram 2 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention;

5 is a block diagram 3 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention;

6 is a block diagram 4 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention;

7 is a block diagram 5 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention;

FIG. 8 is a structural block diagram of an apparatus for detecting a channel usage according to Embodiment 1 of the present invention; FIG.

9 is a flow chart of a method of detecting a channel usage according to a first embodiment of the present invention;

Figure 10 is a block diagram showing the structure of an apparatus for determining the use of an SDH channel according to Embodiment 2 of the present invention;

11 is a schematic diagram showing a frame structure of an STM-N frame according to an embodiment of the present invention;

12 is a structural diagram of SDH multiplexing frame mapping in an SDH channel according to an embodiment of the present invention;

FIG. 13 is a structural block diagram of an apparatus for determining an operation of an OTN channel according to Embodiment 3 of the present invention; FIG.

14 is a schematic structural diagram of an OTN frame (G.709 frame) according to an embodiment of the present invention;

FIG. 15 is a structural diagram of an OTN multiplexing map according to an embodiment of the present invention.

Embodiments of the invention

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

In this embodiment, a method for determining a channel state is provided. FIG. 1 is a flowchart of a method for determining a channel state according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, comparing the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame, where the previous transmission frame is the current distance Transmitting the most recent transmission frame of the frame, the position of the first frame in the current transmission frame and the position of the second frame in the previous transmission frame;

Step S104, in a case where the comparison result is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, determining that the state of the channel for transmitting the first frame is an unbeared service status.

Through the above steps, comparing whether the payload data of the first frame in the current transmission frame is the same as the frame payload data of the corresponding position in the previous transmission frame, determining the state of the channel transmitting the first frame, and accurately knowing the channel The use of the device reduces the waste of the channel, thereby improving the efficiency of the channel and saving operating costs.

In an optional embodiment, when the current transmission frame is a synchronous transmission module N-level STM-N frame, the foregoing method may further include: determining, by using the following manner, the first frame: demultiplexing the STM-N frame into N STM-1 frame; determining one STM-1 frame of the N STM-1 frames as the first frame. In the In an optional embodiment, since the STM-1 frame transmitted in the channel exists in the form of multiplexing into STM-N, whether the payload data of the STM-1 frame in the current transmission frame is the same as the previous transmission frame. When the payload data of the corresponding STM-1 frame is the same for comparison judgment, the STM-N frame needs to be demultiplexed into N STM-1 frames.

When the current transmission frame is an OTUk frame, the foregoing method may further include: determining, by using the following manner, the first frame: demultiplexing the OTUk frame into k OTU1 frames; determining that one of the k OTU1 frames is the first frame. In this alternative embodiment, since the OTU1 frame transmitted in the channel exists in the form of multiplexing into OTUk, whether the payload data of the OTU1 frame in the current transmission frame corresponds to the OTU1 corresponding to the previous transmission frame. When the payload data of the frame is the same for comparison and judgment, the OTUk frame needs to be demultiplexed into k OTU1 frames.

In an optional embodiment, the location of the payload area of the first frame may be determined by determining a type of the first frame; determining a location of the payload area of the first frame according to the type of the first frame. In this alternative embodiment, by demultiplexing the STM-N frames into N STM-1 frames, the location of the payload area in the STM-1 frame can be determined by the type of STM-1 frame.

In another optional embodiment, determining the location of the payload area of the first frame according to the type of the first frame may include at least one of the following methods: when the type of the first frame is a fourth-order management unit (AU-4, Administrative Unit level 4), parsing the first frame to obtain the position of the management unit pointer AU-PTR in the first frame; determining the position of the AU-PTR as the location of the payload area of the first frame; when the first frame When the type is a third-order tributary unit (TU-3, Tnbutary Unit level 3), the first frame is parsed to obtain the position of the third-order virtual container (VC-3, Virtual Container level 12) in the first frame; Determining the location of the VC-3 as the location of the payload area of the first frame; when the type of the first frame is a TU-12 (Tnbutary Unit level 12), parsing the first frame to obtain The position of the 12th-order virtual container (VC-12, Virtual Container level 12) in the first frame; the position of the VC-12 is determined as the location of the payload area of the first frame. In this optional embodiment, the type of the first frame may be AU-4, TU-3, TU-12, and according to different first frame types, the location of the pointer corresponding to the type is found, and the pointer is determined according to the pointer. The location of the payload data for the first frame of the type.

In an optional embodiment, when the current transmission frame is an optical transform unit (out, Optical Transform Unit) frame, the determining method of the channel state may further include determining the location of the payload area of the first frame by: According to the pointer in the frame positioning overhead field in the current transmission frame The position of the payload area of the first frame.

The position pointed by the pointer in the frame positioning overhead field is the location of the payload area of the first frame.

In another optional embodiment, the payload area of the first frame is obtained according to a pointer in the frame positioning overhead field of the first frame.

When receiving the current transmission frame, the number of received bytes is counted. When the mapping type of the first frame is synchronous mapping, when the number of bytes of statistics reaches the position pointed by the pointer in the frame positioning overhead field, then Subsequent received payload area; when the mapping type of the first frame is asynchronous mapping, when the number of bytes counted reaches the position pointed by the pointer in the frame positioning overhead field and the sum of the positive adjustment bytes, or the number of bytes counted When the sum of the position pointed by the pointer in the frame positioning overhead field and the negative adjustment byte is reached, the subsequently received payload area is obtained.

In an optional embodiment, when the current transmission frame is an OTU frame, the determining method of the channel state may further include: determining a location of the payload area of the first frame by: determining a mapping type of the first frame; The mapping type of the first frame determines the location of the payload area of the first frame. In this alternative embodiment, the current transmission frame may be an OTU frame, and the location of the payload data of the OUT frame may be obtained according to the mapping type of the OTU frame.

In another optional embodiment, determining the location of the payload area of the first frame according to the mapping type of the first frame may include: when the mapping type of the first frame is a synchronization mapping, positioning the first frame according to the byte count The location of the payload area; when the mapping type of the first frame is asynchronous mapping, the location of the payload area of the first frame is determined according to the positive adjustment byte and the negative adjustment byte. In this alternative embodiment, the mapping manner of the OUT frame may be a synchronous mapping or an asynchronous mapping. According to different mapping manners, different methods for determining the location of the payload data of the OUT frame may be obtained.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the foregoing embodiment can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware, but in many cases. The former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, can be embodied in the form of a software product stored in a storage medium (such as a read only memory (ROM, Read). Only Memory) or Random Access Memory (RAM), including a number of instructions to make a terminal device (may be A mobile phone, computer, server, or network device, etc.) performs the methods described in various embodiments of the present invention.

In the embodiment, a device for determining the state of the channel is provided, and the device is configured to implement the above-mentioned embodiments and optional embodiments, and details are not described herein. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a block diagram showing the structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes a comparing module 22 and a first determining module 24, which will be described below.

The comparing module 22 is configured to compare the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame, where the previous transmission frame For the transmission frame closest to the current transmission frame, the position of the first frame in the current transmission frame corresponds to the position of the second frame in the previous transmission frame; the first determining module 24 is connected to the comparison module 22, and is set to When the comparison result of the comparison module 22 is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, the state of the channel for transmitting the first frame is determined to be un-beared service. status.

3 is a block diagram of an optional structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes a second determining module 32, in addition to all the modules shown in FIG. The device will be described.

The second determining module 32 is connected to the comparing module 22, and includes a first demultiplexing unit 34 and a first determining unit 36, configured to pass the first solution when the current transmission frame is a synchronous transmission module N-level STM-N frame. The first frame is determined by the unit 34 and the first determining unit 36, and the second determining module 32 will be described below.

The first demultiplexing unit 34 is configured to demultiplex the STM-N frame into N STM-1 frames; the first determining unit 36 is connected to the first demultiplexing unit 34, and is configured to determine N STM-1 One STM-1 frame in the frame is the first frame.

4 is a block diagram 2 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a third determining module 42 in addition to all the modules shown in FIG. The device will be described below.

The third determining module 42 is coupled to the second determining module 32 and the comparing module 22, and includes a second determining unit 44 and a third determining unit 46, configured to determine the first frame by the second determining unit 44 and the third determining unit 46. The position of the payload area is described below for the third determining module 42.

The second determining unit 44 is configured to determine the type of the first frame; the third determining unit 46 is coupled to the second determining unit 44, and is configured to determine the location of the payload area of the first frame according to the type of the first frame.

5 is a block diagram 3 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 5, the third determining unit 46 includes a first determining subunit 52, a second determining subunit 54, and a third determining. At least one of the subunits 56, the third determining unit 46 is described below.

The first determining sub-unit 52 is configured to parse the first frame to obtain the position of the management unit pointer AU-PTR in the first frame when the type of the first frame is AU-4; determine the position of the AU-PTR as The location of the payload area of the first frame; the second determining sub-unit 54 is configured to parse the first frame to obtain the location of the VC-3 in the first frame when the type of the first frame is TU-3; Determining the location of the VC-3 as the location of the payload area of the first frame; the third determining sub-unit 56 is configured to parse the first frame to obtain the first frame when the type of the first frame is TU-12 The location of the VC-12; determine the location of the VC-12 as the location of the payload area of the first frame.

Optionally, the device includes a fourth determining module 62 in addition to all the modules shown in FIG. 2, which will be described below.

6 is a block diagram of a preferred structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 6, the apparatus includes a fourth determining module 62 in addition to all the modules shown in FIG. The device is described.

The fourth determining module 62 is connected to the comparing module 22, and includes a fourth determining unit 64 and a fifth determining unit 66, configured to determine, by the fourth determining unit 64 and the fifth determining unit 66, when the current transmission frame is an OTU frame. The position of the payload area of one frame, the fourth determination module 62 will be described below.

The fourth determining unit 64 is configured to determine a mapping type of the first frame, and the fifth determining unit 66 is connected to the fourth determining unit 64, configured to determine a location of the payload area of the first frame according to the mapping type of the first frame.

7 is a block diagram 5 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention. As shown in FIG. 7, the fifth determining unit 66 includes a positioning subunit 72 and a fourth determining subunit 74. The fifth determining unit 66 will be described.

The positioning sub-unit 72 is configured to: when the mapping type of the first frame is a synchronization mapping, locate the location of the payload area of the first frame according to the byte count; and the fourth determining sub-unit 74 is configured to use the mapping type of the first frame. For asynchronous mapping, the position of the payload area of the first frame is determined according to the positive adjustment byte and the negative adjustment byte.

Optionally, the device includes a fifth determining module, which is connected to the comparing module 22, and is configured to set a frame positioning overhead according to the current transmission frame when the current transmission frame is an OTU frame, in addition to all the modules shown in FIG. A pointer in the field determines the location of the payload area of the first frame.

Preferred embodiments of the method and apparatus for determining the channel state of the present invention are given below.

Embodiment 1

Embodiment 1 of the present invention provides a method and device for detecting channel usage, which is a method and device for detecting channel usage, which overcomes the problem that the carrier is difficult to grasp and causes channel waste to be used in the related art. Device).

Embodiment 1 of the present invention adopts the following technical solutions:

FIG. 8 is a structural block diagram of an apparatus for detecting a channel usage according to a first embodiment of the present invention. As shown in FIG. 8, the apparatus may include a receiving module 82 (corresponding to the second determining module 32 in the foregoing embodiment), and a payload. The positioning module 84 (corresponding to the third determining module 42 and/or the fourth determining module 62 in the above embodiment), the payload storage module 86 and the payload comparison module 88 (corresponding to the comparison module 22 and the first determination in the above embodiment) Module 24) The following modules:

The receiving module 82 is configured to: frame, demultiplex, descramble, etc. the current transmission frame;

The payload location module 84 is connected to the receiving module 82, configured to parse the overhead information, and locate the location of the payload in the channel;

The payload storage module 86 is connected to the payload positioning module 84 and configured to store the parsed payload portion in a random access memory (RAM).

Payload comparison module 88: connected to RAM and payload location module 84, set to RAM The payload in the previous frame is compared with the current frame data. If the comparison result is the same, it is determined that the current channel does not carry the service; if the comparison result is different, it is determined that the current channel carries the service.

FIG. 9 is a flowchart of a method for detecting a channel usage according to the embodiment of the present invention. FIG. 9 is a flowchart of detecting a usage of a transmission channel according to Embodiment 1 of the present invention. The method includes the following steps:

Step S802: The receiving module 82 finds the starting position of the frame according to the frame positioning overhead in the block frame, thereby determining the position of each byte in the frame.

Step S804: In the payload positioning module 84, the specific location of the payload in the channel is parsed according to the overhead byte.

Step S806: The payload storage module 86 stores the extracted payload in the byte order according to the byte order.

Step S808: The payload comparison module 88 compares the payload byte in the current frame with the previous frame byte stored in the RAM, and outputs a comparison result. If the comparison result is the same, it is determined that the service is not carried in the current channel, and the result is sent to the CPU module, indicating that the current channel is not loaded with data; if the comparison result is different, then the judgment is made according to the actual situation.

Advantageous Effects: Compared with the related technologies, the method and apparatus of the first embodiment of the present invention achieve the effect of allowing the operator to better grasp the channel usage, save operating costs, and improve the channel utilization efficiency.

Embodiment 2

In the second embodiment of the present invention, the use of the SDH channel is determined.

FIG. 10 is a structural block diagram of a device for determining the usage of an SDH channel according to Embodiment 2 of the present invention. As shown in FIG. 10, in the second embodiment of the present invention, the device includes: an SDH receiving module 92, and an AU-4 pointer parsing module 942. , VC-4 data storage module 962, VC-4 data storage module 982, TU-3 pointer parsing module 944, VC-3 data storage module 964, VC-3 data comparison module 984, TU-12 pointer parsing module 946, VC -12 data storage module 966, VC-12 data comparison module 986. The SDH receiving module 92 includes a framing unit, a demultiplexing unit, and a descrambling unit.

According to the apparatus shown in FIG. 9, the determining side of the use condition of the SDH channel of the second embodiment of the present invention The process of the law is as follows:

After the STM-N frame enters the apparatus of the second embodiment of the present invention, it first enters the framing unit of the SDH receiving module 92. The framing unit determines the position of the STM-N frame header according to the A1 and A2 fields in the STM-N frame, that is, the position where the A1 and A2 fields start is the position of the STM-N frame header. A1 and A2 have fixed values, that is, there are fixed bit patterns, A1:11110110 (f6H), A2:00101000 (28H). Detecting every byte in the signal stream, when it is found that 3N f6Hs appear consecutively, followed by 3N 28H bytes (3 in each of the A1 and A2 bytes in the STM-1 frame), it is determined that now At the beginning, an STM-N frame is received, and the receiving end distinguishes different STM-N frames by locating the starting point of each STM-N frame to achieve the purpose of separating different frames. When N=1, the STM- is distinguished. 1 frame. The resulting fp signal is aligned with the last A1 byte in this framing unit as an indication of the header of the subsequent demultiplexing unit.

The signal stream processed by the framing unit will then enter the demultiplexing unit. FIG. 11 is a schematic diagram showing the frame structure of an STM-N frame. As shown in FIG. 11, the signal of the STM-N frame is a frame structure of 9 rows×270×N columns. Here, N is consistent with the N phase of STM-N, and the value range is 1, 4, 16, 64..., indicating that the signal is formed by interleaving multiplexing of N STM-1 signals. It can be seen that the frame structure of the STM-1 signal is a block frame of 9 rows × 270 columns. As seen from FIG. 11, when N STM-1 signals are inter-multiplexed into STM-N signals by byte interleaving, only The column of the STM-1 signal is inter-multiplexed by byte, and the number of lines is constant to 9 lines. The STM-N frames in the demultiplexing unit will be demultiplexed into N STM-1 frames, which are processed separately in the subsequent descrambling unit.

Then, the signal stream processed by the demultiplexing unit enters the descrambling unit. In the SDH, the scrambling code is used at the origin to prevent the signal from appearing in the transmission with a long connection “0” or a long connection “1”, which is easy to receive the signal from the signal. Extract timing information. Therefore, the signal needs to be descrambled at the receiving end. The International Telegraph and Telephone Consultative Committee (ITU-T) regulates the scrambling of non-return-to-zero (NRZ) codes using a standard level 7 scrambler. The scrambling code generator polynomial is 1+X6+X7, and the scrambling code sequence length is 27-1=127 (bit). The advantage of this method is that the pattern is the simplest, does not increase the line signal rate, has no optical power penalty, does not require encoding, the originator needs a scrambler, and the receiving end uses the same standard descrambler to receive the originating service. Achieve optical path interconnection in a multi-vendor equipment environment. The descrambling unit will descramble all bytes except the first line.

Then, the signal processed by the descrambling unit enters the AU-4 pointer parsing module 942, and the location of the management unit-pointer (AU-PTR) is in the 4th row and the 1st column of the STM-1 frame. 9 bytes, indicating that the first byte J1 of VC-4 is at the specific location of the AU-4 payload, so that the receiving end can correctly separate the VC-4 accordingly. The AU-4 pointer parsing module 942 calculates the specific location of the VC-4 in the AU-4 according to the H1 and H2 pointers in the STM-N frame, and generates a pl_au4 signal for the VC-4 data storage module 962 to indicate VC. -4 location of the payload. 12 is a SDH multiplex frame mapping structure diagram in the SDH channel. As shown in FIG. 12, in a VC-4 data, VC-4 data may be carried, or three VC-3 data may be carried, or 63 VC-12 data. The AU-4 pointer parsing module 942 extracts the H4 byte at the same time. If the subsequent TU-12 pointer parsing module 946 needs to analyze the TU-12, the H4 byte is required to provide the multiframe number.

Then, after the signal processed by the AU-4 pointer parsing module 942 enters the VC-4 storage module 962, the payload of the VC-4 is written into the random access memory according to the pl_au4 signal provided by the AU-4 pointer parsing module 942 ( Random Access Memory (referred to as RAM)1, RAM1 is controlled by paging, and two pages are alternately read and written. When one page is written, the other page is read. This RAM1 and the RAM2 and RAM3 used in the subsequent modules can use the internal RAM of the Field-Programmable Gate Array (FPGA) or the external synchronous static random access memory (Synchronous Static Random External RAM such as Access Memory (SSRAM) and Synchronous Dynamic Random Access Memory (SDRAM).

The VC-4 data comparison module 982 then reads the VC-4 data of the previous frame from the RAM 1 and compares this data with the current data. If the comparison results are the same, it means that the current channel carries VC-4 particles, and the VC-4 particles do not carry valid data. At this time, an indication signal is generated and sent to the CPU module, indicating that the VC-4 does not carry valid data. If the comparison results are different, it indicates that the current channel may carry TU-3 or TU-12 particles, or the VC-4 particles have carried valid data. The data will be further processed.

Next, the data of the lower-order channel needs to be analyzed, and the TU-3 pointer parsing module 944 is first entered. A pointer of 3 bytes (H1, H2, H3) is added to the frame of VC-3 - TU-3 tributary unit pointer (Tributary Unit 3 Pointer), which is abbreviated as TU-3 pointer offset range of 0 to 764. ,Such as If the parsed pointer is greater than 764, it is considered that the invalid TU-3 pointer is extracted, indicating that the TU-12 particle may be loaded, and the pointer resolution of the TU-12 is directly performed. If a valid pointer is extracted, the TU-3 pointer parsing module 944 will parse out the specific location of the VC-3 based on the TU-3 pointer. And generating a pl_tu3 signal is provided to the VC-3 data storage module 964 to indicate the location of the VC-3 payload.

The VC-3 data storage module 964 writes the payload of the VC-3 into the RAM 2 according to the pl_tu3 signal provided in the TU-3 pointer parsing module 944, and the RAM 2 is controlled by paging, and the two pages are alternately read and written. When one page is written, the other page is read.

Thereafter, in the VC-3 data comparison module 984, the VC-3 data comparison module 984 reads the VC-3 data of the previous frame from the RAM 2 and compares this data with the current data. If the comparison results are the same, it means that the current channel carries VC-3 particles, and the VC-3 particles do not carry valid data. At this time, an indication signal is generated and sent to the CPU module, indicating that the VC-3 does not carry valid data. If the comparison results are different, it indicates that valid data has been carried in the VC-3 particles.

If the pointer of the TU-12 needs to be parsed, the TU-12 pointer parsing module 946 is entered. The TU pointer in the STM-N frame (indicating the location of the TU-12 payload area) is used to indicate the specific location of the first byte V5 of the VC-12 in the TU-12 payload so that the receiving end can correctly separate the VC12. The TU-12 pointer provides a flexible and dynamic method for the positioning of VC12 within the TU-12 multiframe. The position of the TU-PTR is located at V1, V2, V3, and V4 of the TU-12 multiframe. The TU-12 pointer parsing module 946 parses out the payload of the VC-12 based on the pointer value. And generating a pl_tu12 signal is provided to the VC-12 data storage module 966 to indicate the location of the VC-12 payload.

The VC-12 data storage module 966 writes the payload of the VC-12 into the RAM3 according to the pl_tu12 signal provided by the TU-12 pointer parsing module 946, and the RAM3 is controlled by paging, and the two pages are alternately read and written. When one page is written, the other page is read.

In the VC-12 data comparison module 986, the VC-12 data comparison module 986 will read the VC-12 data of the previous frame from the RAM 3 and compare this data with the current data. If the comparison result is the same, it means that the current channel carries VC-12 particles, and the VC-12 particles do not carry valid data. At this time, an indication signal is generated and sent to the CPU module, indicating that the VC-12 does not carry valid data. If the comparison results are different, it indicates that valid data has been carried in the VC-12 particles.

Embodiment 3

In the third embodiment of the present invention, an OTN transmission channel is taken as an example to describe a method and an apparatus for using an OTN transmission channel.

FIG. 13 is a structural block diagram of a device for determining the usage of an OTN channel according to Embodiment 3 of the present invention. As shown in FIG. 13, the device of the third embodiment includes: an OTU frame receiving module 122, an OPU positioning module 124, and an OPU storage module. 126 and OPU comparison module 128, the device will be described below.

The OTU frame receiving module 122 includes a framing unit configured to receive and frame the OTU frame.

The OPU positioning module 124 is connected to the OTU frame receiving module 122 and configured to locate the payload location of the OPU frame.

The OPU storage module 126 is connected to the OPU positioning module 124 and the RAM, and is configured to store the payload data in the OPU frame into the RAM;

The OPU comparison module 128 is connected to the OPU positioning module 124 and the OPU storage module 126, and is configured to read the payload data of the previous frame from the RAM, compare the data with the current data, and if the comparison result is the same, the current The channel does not carry valid data. At this time, an indication signal is generated and sent to the CPU module, indicating that the channel does not carry valid data. If the comparison result is different, it indicates that valid data has been carried in the current channel.

According to the apparatus for determining the usage of the OTN channel shown in FIG. 13, the flow of the method for determining the usage of the OTN channel in the third embodiment of the present invention is as follows:

After the OTU frame enters the apparatus of the third embodiment of the present invention, it first enters the framing unit of the OTU frame receiving module 122. The framing unit determines the position of the frame header based on the frame positioning overhead byte. 14 is a schematic diagram of an OTN frame structure (G.709 frame). The OA1 and OA2 fields in the OTN frame are used to determine the position of the OTN frame header, that is, the position where the OA1 and OA2 fields start is the position of the OTN frame header. OA1, OA2 have fixed values, that is, there are fixed bit patterns, OA1:11110110 (f 6H), OA2:00101000 (28H). Detecting every byte in the signal stream, when it is found that three f6Hs appear consecutively, followed by three 28H bytes, it is determined that a frame is now received, and the receiving end locates the starting point of each frame. Different frames are distinguished to achieve the purpose of separating different frames. In this module, the generated fp signal is aligned with the last A1 byte as the frame header of the subsequent OPU positioning module 124. Instructions.

The signal processed by the OTU frame receiving module 122 then enters the OPU positioning module 124. The OPU positioning module 124 determines whether it is a synchronous mapping or an asynchronous mapping according to the JC byte in the OUT frame. If the synchronization mapping directly locates the payload according to the byte count. The position, if asynchronous mapping is used, the payload position is calculated based on the positive adjustment byte and the negative adjustment byte, and a pl signal is generated and sent to the payload storage module.

After the signal processed by the OPU positioning module 124 enters the OPU storage module 126, the OPU storage module 126 writes the payload into the RAM according to the pl signal provided by the OPU1 positioning module 124, and the RAM is controlled by paging, and the two pages are alternately replaced. Do read and write operations, when one page is written, another page is read. This RAM and the RAM used in the subsequent modules can use the internal RAM of the FPAG, or an external RAM such as an external SSRAM or SDRAM.

Then, in the OPU comparison module 128, the OPU comparison module 128 reads the payload data of the previous frame from the RAM and compares this data with the current data. If the comparison result is the same, it means that the current channel does not carry valid data. At this time, an indication signal is generated and sent to the CPU module, indicating that the channel does not carry valid data. If the comparison result is different, it indicates that valid data has been carried in the current channel. Figure 15 is a diagram showing the structure of an OTN multiplexing map.

It should be noted that each of the foregoing modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1, comparing the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame that is closest to the current transmission frame, where The position of the frame in the current transmission frame corresponds to the position of the second frame in the previous transmission frame;

S2. In a case where the comparison result is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, the state of the channel for transmitting the first frame is determined to be un-beared traffic.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a U disk, a Read-Only Memory (ROM), a RAM, a mobile hard disk, a magnetic disk, or an optical disk, and the like. The medium of the program code.

Optionally, in the embodiment, the processor executes the above-mentioned S1-S2 according to the stored program code in the storage medium.

For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the foregoing embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program in a storage and a memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The above technical solution accurately knows the use of the channel, thereby reducing the waste of the channel, thereby improving the use efficiency of the channel and saving operating costs.

Claims

A method for determining a channel status includes:

Comparing the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame, wherein the last transmission frame is the closest to the current transmission frame a transmission frame, a position of the first frame in the current transmission frame and a position of the second frame in the previous transmission frame;

In a case where the comparison result is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame, determining that the state of the channel for transmitting the first frame is The business status is not carried.
The method of claim 1 further comprising

When the current transmission frame is a synchronous transmission module N-level STM-N frame, the first frame is determined by:

Demultiplexing the STM-N frame into N STM-1 frames;

Determining one of the N STM-1 frames as the first frame.
The method of claim 2, the method further comprising determining a location of a payload area of the first frame by:

Determining the type of the first frame;

Determining a location of a payload area of the first frame according to a type of the first frame.
The method according to claim 3, wherein determining the location of the payload area of the first frame according to the type of the first frame comprises at least one of the following methods:

When the type of the first frame is the fourth-order management unit AU-4, parsing the first frame to obtain a location of the management unit pointer AU-PTR in the first frame; determining the AU-PTR The location is the location of the payload area of the first frame;

When the type of the first frame is the third-order tributary unit TU-3, parsing the first frame to obtain a position of the third-order virtual container VC-3 in the first frame; determining the VC The position of -3 is the location of the payload area of the first frame;

When the type of the first frame is a 12th-order tributary unit TU-12, the first frame is parsed to obtain a position of the 12th-order virtual container VC-12 in the first frame; The location of VC-12 is the location of the payload area of the first frame.
The method according to claim 1, further comprising determining a location of a payload area of the first frame when the current transmission frame is an OTU frame:

Determining a mapping type of the first frame;

Determining a location of a payload area of the first frame according to a mapping type of the first frame.
The method according to claim 5, wherein determining the location of the payload area of the first frame according to the mapping type of the first frame comprises:

When the mapping type of the first frame is a synchronization mapping, locate a location of a payload area of the first frame according to a byte count;

When the mapping type of the first frame is an asynchronous mapping, the location of the payload area of the first frame is determined according to the positive adjustment byte and the negative adjustment byte.
The method of claim 1 further comprising

When the current transmission frame is an optical conversion unit OTU frame, the location of the payload area of the first frame is determined according to a pointer in a frame positioning overhead field in the current transmission frame.
A channel status determining device includes:

And a comparison module, configured to compare the payload data of the payload area of the first frame in the current transmission frame with the payload data of the payload area of the second frame in the previous transmission frame, where the previous transmission frame is a transmission frame closest to the current transmission frame, the position of the first frame in the current transmission frame and the position of the second frame in the previous transmission frame;

a first determining module, configured to determine, when the comparison result of the comparison module is that the payload data of the payload area of the first frame is the same as the payload data of the payload area of the second frame The state of the channel transmitting the first frame is an un-beared service state.
The apparatus according to claim 8, further comprising: a second determining module, configured to determine the first frame by the following unit when the current transmission frame is a synchronous transmission module N-level STM-N frame:

a first demultiplexing unit, configured to demultiplex the STM-N frame into N STM-1 frames;

The first determining unit is configured to determine that one of the N STM-1 frames is the first frame.
The apparatus of claim 9, further comprising a third determining module configured to determine a location of a payload area of the first frame by:

a second determining unit, configured to determine a type of the first frame;

And a third determining unit, configured to determine a location of the payload area of the first frame according to the type of the first frame.
The apparatus of claim 10, wherein the third determining unit comprises at least one of the following subunits:

a first determining subunit, configured to parse the first frame to obtain a management unit pointer AU-PTR in the first frame when the type of the first frame is a fourth-order management unit AU-4 a location; determining a location of the AU-PTR as a location of a payload area of the first frame;

a second determining subunit, configured to: when the type of the first frame is a third-order tributary unit TU-3, parse the first frame to obtain a third-order virtual container VC in the first frame Position of 3; determining a location of the VC-3 as a location of a payload area of the first frame;

a third determining subunit, configured to parse the first frame to obtain a twelve-order virtual container in the first frame when the type of the first frame is a twelve-order tributary unit TU-12 The location of the VC-12; determining the location of the VC-12 as the location of the payload area of the first frame.
The apparatus according to claim 8, further comprising: a fourth determining module, configured to determine a location of a payload area of the first frame by the following unit when the current transmission frame is an OTU frame:

a fourth determining unit, configured to determine a mapping type of the first frame;

And a fifth determining unit, configured to determine a location of the payload area of the first frame according to a mapping type of the first frame.
The apparatus of claim 12, wherein the fifth determining unit comprises:

a positioning subunit, configured to when the mapping type of the first frame is a synchronization mapping, according to a byte Counting the location of the payload area of the first frame;

And a fourth determining subunit, configured to determine, when the mapping type of the first frame is an asynchronous mapping, determining a location of the payload area of the first frame according to the positive adjustment byte and the negative adjustment byte.
The apparatus according to claim 8, further comprising: a fifth determining module, configured to determine, according to a pointer in a frame positioning overhead field in a current transmission frame, when the current transmission frame is an OTU frame The location of the payload area of a frame.