WO2017118042A1 - Procédé et appareil pour déterminer un état de canal - Google Patents

Procédé et appareil pour déterminer un état de canal Download PDF

Info

Publication number
WO2017118042A1
WO2017118042A1 PCT/CN2016/096235 CN2016096235W WO2017118042A1 WO 2017118042 A1 WO2017118042 A1 WO 2017118042A1 CN 2016096235 W CN2016096235 W CN 2016096235W WO 2017118042 A1 WO2017118042 A1 WO 2017118042A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
determining
location
payload area
payload
Prior art date
Application number
PCT/CN2016/096235
Other languages
English (en)
Chinese (zh)
Inventor
程炜
赵刚
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017118042A1 publication Critical patent/WO2017118042A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0614—Systems characterised by the synchronising information used the synchronising signal being characterised by the amplitude, duration or polarity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0623—Synchronous multiplexing systems, e.g. synchronous digital hierarchy/synchronous optical network (SDH/SONET), synchronisation with a pointer process
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
    • H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
    • H04J2203/0003—Switching fabrics, e.g. transport network, control network

Definitions

  • T1 DS1
  • 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.
  • ISDN Integrated Services Digital Network
  • FDDI Fiber Distributing Data Interface
  • 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.
  • SOH Segment OverHead
  • STM-N payload area STM-N payload area
  • management unit pointer AU PTR
  • 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
  • OTN Optical Transport Network
  • SDH SDH-based Virtual Private Network
  • 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.
  • WDM Wavelength Division Multiplexing
  • OTN Optical Channel Data Unit-k
  • FEC Forward Error Correction
  • 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. .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • An embodiment of the present invention further provides a channel status determining apparatus, including:
  • 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 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.
  • 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
  • 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 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.
  • 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.
  • 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.
  • 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.
  • the device further includes
  • 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.
  • 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.
  • FIG. 1 is a flow chart of a method of determining a channel state according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing the structure of a channel state determining apparatus according to an embodiment of the present invention
  • FIG. 3 is a block diagram 1 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention.
  • FIG. 4 is a block diagram 2 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention.
  • FIG. 5 is a block diagram 3 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention.
  • FIG. 6 is a block diagram 4 of an optional structure of a channel state determining apparatus according to an embodiment of the present invention.
  • FIG. 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.
  • FIG. 11 is a schematic diagram showing a frame structure of an STM-N frame according to an embodiment of the present invention.
  • FIG. 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.
  • 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.
  • 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.
  • 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.
  • the STM-N frame needs to be demultiplexed into N STM-1 frames.
  • 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.
  • 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.
  • the OTUk frame needs to be demultiplexed into k OTU1 frames.
  • 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.
  • the location of the payload area in the STM-1 frame can be determined by the type of STM-1 frame.
  • 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
  • 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.
  • 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.
  • the payload area of the first frame is obtained according to a pointer in the frame positioning overhead field of the first frame.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the term “module” may implement a combination of software and/or hardware of a predetermined function.
  • 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • 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.
  • the device includes a fourth determining module 62 in addition to all the modules shown in FIG. 2, which will be described below.
  • FIG. 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
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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).
  • RAM random access memory
  • 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.
  • 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.
  • 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.
  • the device in the second embodiment of the present invention, 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.
  • 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).
  • FIG. 11 is a schematic diagram showing the frame structure of an STM-N frame.
  • the signal of the STM-N frame is a frame structure of 9 rows ⁇ 270 ⁇ N columns.
  • 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.
  • the frame structure of the STM-1 signal is a block frame of 9 rows ⁇ 270 columns. As seen from FIG.
  • the signal stream processed by the demultiplexing unit enters the descrambling unit.
  • 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 Brass and Telephone Consultative Committee (ITU-T) regulates the scrambling of non-return-to-zero (NRZ) codes using a standard level 7 scrambler.
  • 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.
  • 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.
  • 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.
  • RAM1 Random Access Memory
  • SSRAM Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • 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.
  • 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.
  • TU-3 pointer offset range 0 to 764.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the flow of the method for determining the usage of the OTN channel in the third embodiment of the present invention is as follows:
  • 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).
  • the receiving end locates the starting point of each frame. Different frames are distinguished to achieve the purpose of separating different frames.
  • 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.
  • the OPU storage module 126 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.
  • 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.
  • each of the foregoing modules may be implemented by software or hardware.
  • 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.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • the state of the channel for transmitting the first frame is determined to be un-beared traffic.
  • 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 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 processor executes the above-mentioned S1-S2 according to the stored program code in the storage medium.
  • 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.
  • 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.
  • the invention is not limited to any specific combination of hardware and software.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil pour déterminer un état de canal. Le procédé comprend les étapes suivantes : comparer des données utiles d'une région de données utiles d'une première trame préréglée dans la trame de transmission courante à des données utiles d'une région de données utiles d'une seconde trame préréglée dans la trame de transmission précédente, une position de la première trame dans la trame de transmission courante correspondant à une position de la seconde trame dans la trame de transmission précédente; et lorsqu'un résultat de comparaison montre que les données utiles de la région de données utiles de la première trame sont les mêmes que les données utiles de la région de données utiles de la seconde trame, déterminer qu'un état d'un canal pour transmettre la première trame est un état sans porter de service.
PCT/CN2016/096235 2016-01-04 2016-08-22 Procédé et appareil pour déterminer un état de canal WO2017118042A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201610005054.6 2016-01-04
CN201610005054.6A CN106941388B (zh) 2016-01-04 2016-01-04 通道状态的确定方法及装置

Publications (1)

Publication Number Publication Date
WO2017118042A1 true WO2017118042A1 (fr) 2017-07-13

Family

ID=59273069

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/096235 WO2017118042A1 (fr) 2016-01-04 2016-08-22 Procédé et appareil pour déterminer un état de canal

Country Status (2)

Country Link
CN (1) CN106941388B (fr)
WO (1) WO2017118042A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412692A (zh) * 2018-10-30 2019-03-01 中国科学院国家授时中心 一种分布式光纤授时系统及其sagnac效应补偿方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1674478A (zh) * 2004-03-23 2005-09-28 华为技术有限公司 虚容器帧分析的方法及装置
CN101291179A (zh) * 2007-04-17 2008-10-22 华为技术有限公司 一种光传送网中客户信号传送方法及相关设备
US20100226370A1 (en) * 2009-03-06 2010-09-09 Hitachi, Ltd. Network system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1798145A (zh) * 2004-12-24 2006-07-05 华为技术有限公司 同步光纤网或同步数字体系帧承载的净荷检测方法
US7873732B2 (en) * 2005-04-28 2011-01-18 International Business Machines Corporation Maintaining service reliability in a data center using a service level objective provisioning mechanism
CN101729188B (zh) * 2008-10-14 2016-10-05 华为技术有限公司 发送和接收映射开销的方法、装置
CN101465706A (zh) * 2008-12-29 2009-06-24 华为技术有限公司 一种同步数字序列信号的传输方法、装置和系统
CN103731223B (zh) * 2012-10-16 2016-09-28 中兴通讯股份有限公司 一种时钟恢复方法及装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1674478A (zh) * 2004-03-23 2005-09-28 华为技术有限公司 虚容器帧分析的方法及装置
CN101291179A (zh) * 2007-04-17 2008-10-22 华为技术有限公司 一种光传送网中客户信号传送方法及相关设备
US20100226370A1 (en) * 2009-03-06 2010-09-09 Hitachi, Ltd. Network system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109412692A (zh) * 2018-10-30 2019-03-01 中国科学院国家授时中心 一种分布式光纤授时系统及其sagnac效应补偿方法
CN109412692B (zh) * 2018-10-30 2021-05-18 中国科学院国家授时中心 一种分布式光纤授时系统及其sagnac效应补偿方法

Also Published As

Publication number Publication date
CN106941388A (zh) 2017-07-11
CN106941388B (zh) 2019-11-29

Similar Documents

Publication Publication Date Title
US11234055B2 (en) Service data processing method and apparatus
US11233571B2 (en) Method for processing low-rate service data in optical transport network, apparatus, and system
US7106968B2 (en) Combined SONET/SDH and OTN architecture
US7602814B2 (en) Systems and methods for mapping and multiplexing wider clock tolerance signals in optical transport network transponders and multiplexers
US8494363B2 (en) Signal format conversion apparatus and methods
US8699886B2 (en) Externally synchronized optical transport network systems and associated methods
EP4027650A1 (fr) Procédé et dispositif de traitement de données de service dans un réseau de transport optique, et système associé
US9838109B2 (en) Method and device for realizing optical channel data unit shared protection ring
US20070264015A1 (en) Uniform Switching System and Method for Synchronous Optical Network and Optical Transport Network
WO2008122218A1 (fr) Procédé de multiplexage et de démultiplexage de service de faible débit binaire
US10931578B2 (en) Method for processing data in ethernet, device, and system
US7227844B1 (en) Non-standard concatenation mapping for payloads
JP2010206625A (ja) 光伝送装置及び光伝送方法
WO2017118042A1 (fr) Procédé et appareil pour déterminer un état de canal
EP4391438A1 (fr) Procédé de communication, appareil correspondant et support de stockage
WO2020051851A1 (fr) Procédé et appareil de transmission de données dans un réseau de transport optique
US9226050B2 (en) Transmission apparatus and transmission method
US8824507B2 (en) Transmitting apparatus and signal transmitting method
JP2002176408A (ja) マルチフレーム多重伝送装置
JP2012249028A (ja) 伝送装置及びデータ伝送方法
Dhadwal et al. SONET/SDH: Review of technology and developments
JP6101306B2 (ja) 光伝送装置及び光伝送方法
Dutta et al. Grooming mechanisms in SONET/SDH and next-generation SONET/SDH
Dhull et al. Analyzing Bandwidth spectrum in SONET & SDH
SECTOR et al. ITU-Tg. 709/Y. 1331

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16883172

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16883172

Country of ref document: EP

Kind code of ref document: A1