WO2008031356A1 - A method for realizing the subnetwork connection protection with sub-layer monitoring of k rank optical channel data unit and an apparatus thereof - Google Patents

A method for realizing the subnetwork connection protection with sub-layer monitoring of k rank optical channel data unit and an apparatus thereof Download PDF

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Publication number
WO2008031356A1
WO2008031356A1 PCT/CN2007/070616 CN2007070616W WO2008031356A1 WO 2008031356 A1 WO2008031356 A1 WO 2008031356A1 CN 2007070616 W CN2007070616 W CN 2007070616W WO 2008031356 A1 WO2008031356 A1 WO 2008031356A1
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WO
WIPO (PCT)
Prior art keywords
tcm
unit
signal
oduk
service
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Application number
PCT/CN2007/070616
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English (en)
French (fr)
Inventor
Jun Yan
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to ES07801025.3T priority Critical patent/ES2541137T3/es
Priority to CN200780000275.3A priority patent/CN101313497B/zh
Priority to EP07801025.3A priority patent/EP2061164B1/en
Publication of WO2008031356A1 publication Critical patent/WO2008031356A1/zh
Priority to US12/401,234 priority patent/US20090175618A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • H04J3/14Monitoring arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/16Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1605Fixed allocated frame structures
    • H04J3/1652Optical Transport Network [OTN]

Definitions

  • the present invention relates to the field of optical transport networks, and in particular, to a sub-network connection protection method and apparatus for implementing k-level optical channel data unit sub-layer monitoring.
  • Optical Transport Network is a set of functional entities that can provide transmission, multiplexing, routing, monitoring, and survivability processing for the client layer signals mainly in the optical domain.
  • OTN Optical Transport Network
  • the optical transport network includes an optical channel (Och, Optical channel) layer and an optical multiplex section (0MS,
  • the Optical Multiplex Section layer and the Optical Transmission Section are first digitally encapsulated, then mapped to the OCh layer, multiplexed to the 0MS layer, and then transmitted over the optical cable via the 0TS layer.
  • Each subnet is generally classified into different operators, and may be managed and maintained by different operators. To ensure the quality of the respective signal transmission, each operator may adopt various protection methods for protection.
  • the inventor finds that the description of the subnetwork connection protection (SNCP) in the existing protocol only describes the requirement of the SNCP from the perspective of requirements, and does not specify how to implement the SNCP. There is no related description of the implementation method and device of the sub-network connection protection (SNC/S, SNCP with Sub-layer monitoring).
  • the OCh layer consists of three parts, namely a k-th order optical channel transmission unit (OTUk), a k-th order optical channel data unit (0DUk), and a k-th order optical channel payload unit (OPUk). Where k is the level and the standardization level is 1, 2, 3.
  • the present invention provides a method and apparatus for implementing ODUk sublayer monitoring subnet connection protection, which can implement ODUk SNC/S protection and achieve mutual cooperation between multiple SNC/S.
  • the present invention provides a method for implementing sub-connection protection of a k-th order optical channel data unit sub-layer.
  • the method includes: allocating a serial connection monitoring TCM for a k-th optical channel data unit ODUk service, and if different levels of TCM are allocated to the same node in the ODUK service, the different levels of TCM are specified in the same node.
  • the sequence is executed; the sub-layer monitoring sub-network connection protection SNC/S protection is configured for the ODUk service.
  • the present invention further provides an apparatus for implementing a k-th optical channel data unit sublayer monitoring subnet connection protection, comprising: a TCM allocation processing unit, configured to allocate a TCM for a specified ODUk service, if the same node in the 0DUK service The different levels of TCM are allocated, and the different levels of TCM are performed in the same order in the same node; the SNC/S protection configuration unit is configured to configure SNC/S protection for the ODUk service.
  • the present invention also provides a method for implementing a k-th optical channel data unit sub-layer monitoring subnet connection protection, including: configuring or designating an ODUk service, configuring a TCM for the ODUk service, and configuring SNC/S protection.
  • the present invention also provides a k-level optical channel data unit sub-layer monitoring sub-network connection protection device, including:
  • the tributary unit is configured to convert the user signal and the ODUk service signal, and process the ODUk service signal from the cross side to the source or sink function of the TCM, and then send it to the intersection side or the user side of the tributary unit; or After the user signal of the side is processed by the source or sink function of the TCM, it is sent to the intersection side or the user side of the branch unit;
  • a line unit for converting between the optical channel layer signal and the optical data unit signal, and processing the ODUk service signal from the cross side to the source or sink function of the TCM, and then sending it to the intersection side or the line side of the line unit; or
  • the OCh service signal on the line side is processed by the source or sink function of the TCM, and then sent to the intersection side or the line side of the line unit;
  • the cross unit for the cross connection of the ODUk service, sends the signal from the tributary unit to any one of the line units or the tributary unit; or sends the signal from the line unit to any one of the tributary units or the line unit;
  • the splitting unit is configured to split the multi-wavelength optical signal into a plurality of optical channel layer signals and output the signals to the line unit; the combining unit is configured to combine the plurality of optical channel layer signals and output the signals to one optical fiber for transmission.
  • the present invention monitors the TCM by assigning a serial connection in the SNC/S protection, and when the different nodes are assigned different levels of TCM, the different levels of the TCM are in the same node.
  • the SNC/S protection is implemented in the specified order, and the SNC/S is used together.
  • FIG. 1 is a flow chart of an embodiment of a SNC/S protection method according to the present invention.
  • FIG. 3 is a block diagram of an embodiment of a SNC/S protection device in the present invention.
  • FIG. 4 is a block diagram of a first embodiment of a protection device according to the present invention.
  • FIG. 5 is a schematic diagram of a node networking of an ODUk service according to the present invention.
  • FIG. 1 shows the flow chart for configuring SNC/S. The specific steps are as follows:
  • Step 100 Specify an ODUk service.
  • Step 101 Determine whether the ODMk service has been allocated for TCM, Tandem connect ion moni tor ing.
  • step 103 If yes, go to step 103; otherwise, go to step 102, assign TCM to this ODUk service, and how to implement TCM allocation, see Figure 2 for details;
  • Step 103 Configure the SNC protection monitoring mode.
  • the monitoring methods included in the SNC include /S, /N, / 1, where
  • SNC/I indicates the inherently monitored SNC, Inherent ly moni tored SNC,
  • SNC/N indicates non-intrusive surveillance SNC, non-intrusive moni tored SNC,
  • SNC/S indicates the sub-layer monitored SNC, sub-layer moni tored SNC
  • Step 104 Determine whether the configured monitoring mode is sub-layer monitoring (ie, is it SNC ⁇ S)? If yes, go to step 106; otherwise, go to step 105.
  • sub-layer monitoring ie, is it SNC ⁇ S
  • Step 105 Configure SNC parameters of other monitoring modes. For other monitoring modes other than /S, this patent does not cover.
  • Step 106 Configure SNC/S parameters.
  • the dual-issue node and the selective node protected by the SNC/S are obtained, and the working service path and the protection service path are obtained, and the TCM level corresponding to the protection is obtained, and the relationship between the protection and other SNC protections is determined.
  • Step 107 the end.
  • Figure 2 shows the flow chart of the OCMk service allocation TCM. The specific steps are as follows:
  • Step 200 Specify an ODUk service.
  • the user needs to select the 0DU service to be allocated by the TCM, and whether the TCM is used in one direction or the TCM is used in both directions.
  • Step 201 configure a level TCM.
  • Step 202 Non-intrusive monitoring configuration in the interval.
  • the user specifies a node that needs to perform non-intrusive monitoring.
  • Step 203 whether to configure another level of TCM? Yes, then perform step 201; otherwise, perform steps
  • Step 204 prompting the user to allocate the result, including the distribution result of the TCMs of the respective levels in different nodes and the order relationship of the processing of the TCMs in the same node and the positional relationship with the cross function.
  • Step 205 the user confirms whether to agree. If the user agrees to the foregoing allocation, the network management sends the result of the automatic allocation and configuration to the node device, and then performs step 207; otherwise, step 206 is performed.
  • Step 206 The user adjusts each function, and provides a graphical interface for the user to adjust the relationship of each function, such as adjusting the allocation of different levels of TCM between different nodes and processing in the same node.
  • Step 207 related configuration of other TCMs, after the previous step is determined, according to the distribution result of the TCM in the previous step, for each level of TCM, a corresponding configuration interface is provided to the user according to the usage of different nodes.
  • TCM For source nodes that use a certain level of TCM, the user is required to set the properties of the transmission, including the configuration of TTI (TriI Trace Ident if ier).
  • the user is required to set the receiving aspect attribute, and the setting receiving aspect attribute includes one or more of the following contents: whether the configuration enables the maintenance signal for the subsequent ODUk path. Insert, configure whether to pass the signal failure and signal degradation information of the TCM to the subsequent layer, configure the path identifier identifier mismatch (TIM, Trace Identifier Mismatch), and the subsequent action enable setting and loss of tandem connection (LTC, Loss of tandem connection)
  • TIM path identifier identifier mismatch
  • LTC Loss of tandem connection
  • TTI path trace identifier
  • BIP-8-8 alarm gate P ⁇ configure whether to lock LCK, Locked defect ⁇ Open indication ( 0CI , Open connection indication ) as an insertion
  • the condition of the alarm indication (AIS, Alarm Indication Signal).
  • the maintenance of the maintenance signal is performed according to the configuration and the previously received signal condition for the overhead and payload of the status field (STAT), wherein the definition of the maintenance signal is met.
  • STAT the definition of 16.5 in G. 709.
  • the configuration transmits the signal failure and signal degradation information of the TCM to the subsequent layer, when the defect of the follow-up service path signal failure (aTSF, Trail Signal Fail) and the follow-up service signal failure (aSSF, Server Signal Failure) is detected.
  • aTSF follow-up service path signal failure
  • ASSF follow-up service signal failure
  • SSF Server Signal Failure
  • the maintenance signal AIS is inserted into the overhead and payload of the STAT, and the TSF/SSF information is transmitted to the subsequent layer.
  • the open indication (0CI) is configured as a condition for inserting an alarm indication AIS
  • the AIS is inserted when a 0CI defect is detected.
  • TCM For intermediate nodes that use a certain level of TCM, no other configuration is required if non-intrusive monitoring is enabled. If configured to enable non-intrusive monitoring, you also need to configure: Configure whether to pass the TCM signal failure and signal degradation information to subsequent levels, configure TIM subsequent action enable settings and serial connection loss LTC follow-up enable settings, set The TCM should receive the TTI, set the TIM detection mode of the TCM, and set the BIP-8 alarm threshold of the TCM.
  • Step 208 enabling or disabling the TCM.
  • the source node and the sink node using the TCM function can be individually enabled or disabled for each level of TCM. If it is configured to be enabled, it is processed according to the set TCM attribute. For the source node using a certain level of TCM, the configured TTI is inserted into the overhead of the TCM at this level, and BIP-8 is calculated and inserted into the overhead. In addition, according to the corresponding source function, BDI (Backward defect indicator), ⁇ (Backward error indicator), BIAE (Backward incoming ignit error) insertion . For a sink node that uses a certain level of TCM, the TCM is monitored according to the configured TCM-related attributes, and the TCM alarm performance of the level is reported. If the protection group associated with the level TCM is configured, the data is started. Some defects obtained by TCM are used as protection switching conditions for protection switching. If configured as disabled, the level TCM is not processed. 209, the end.
  • the protection device 20 includes: a cross unit 21, a branch unit 22, a line unit 23, a demultiplexing unit 24, and a multiplex unit 25, wherein, according to the actual It is required that the branch unit 22 further includes branch units 221, 222 22n, the line unit 23 includes 231, 232 23n, the splitting unit 24 includes a branching unit 241 24n, and the combining unit 25 includes 251 25n; wherein, the function of each unit And their relationship is shown in Figure 4 for an embodiment of the apparatus.
  • the 4 is an embodiment of an SNC/S protection device including a cross unit 11, a tributary unit 12, a line unit 13, a demultiplexing unit 14, and a multiplex unit 15, wherein the line unit 11 includes a line unit 131, a line unit 132, and a line unit 133.
  • the multiplex unit 15 includes a multiplex unit 151, a multiplex unit 152, and a multiplex unit 153. The details are described separately below.
  • the tributary unit 12 is used to perform conversion between the user signal and the ODUk service signal.
  • One end of the branch unit 12 is a user side for input of a user signal and an output of a user signal; the other end is a cross side, and the cross unit 11 is connected for input and output of an ODUk service signal.
  • the path of the ODUk service signal is configurable. That is, in the tributary unit 12, the signal sent from the cross side or the user side can be processed by the source or sink function of the TCM, and then sent to the intersection side or the user of the tributary unit 12. side. For example, after the user signal enters the tributary unit 12, the unit performs an ODKk level-to-customer signal adaptation source function processing, an ODUkP hierarchical termination source function processing, and one or more ODUk serial connection monitoring sub-layers on the input user signal.
  • the TCM function is optional in the tributary unit 12 and may include one or more TCM levels, up to six TCM levels.
  • the line unit 13 is used to complete the conversion between the optical channel layer signal and the optical data unit signal.
  • One end of the line unit 13 is an intersection side, and the connection cross unit 11 is used for input and output of the ODUk service signal; the other end is a line side for receiving the optical channel layer signal input by the demultiplexing unit 14 and the optical channel layer signal Lose
  • the multiplex unit 15 is sent out.
  • the path of the ODUk service signal is configurable, that is, the line unit 13 can process the signal sent from the cross side or the line side to the source or sink function of the TCM, and then to the intersection side or the line side of the line unit 13.
  • the line unit 13 performs one or more ODUk serial connection connection on the input ODUk signal to monitor the sublayer to the ODUk level of the adaptation source function processing, one or Multiple ODUkT hierarchical termination source function processing, K-order optical channel transmission unit OTUk level to ODUk level adaptation source function processing, OTUk level termination source function processing, optical channel layer OCh level to OTUk level adaptation source processing, and
  • the end source function of the OCh layer is processed, etc., and then sent to the multiplex unit 15; when the signal enters the line unit from the demultiplexing unit 14, that is, the line unit 13 performs the OCh level termination of the optical channel layer signal input by the demultiplexing unit 14.
  • OCh level to OTUk level adaptation sink function processing OCh level to OTUk level adaptation sink function processing, OTUk level termination sink function processing, OTUk level to ODUk level adaptation sink function, one or more ODUk serial connection monitoring sublayer termination sink function, The one or more ODUk serial connection monitoring sublayers are processed to the ODUk level of the adaptation sink function and then sent to the cross unit 11.
  • the TCM function is optional in the line unit 13, and may include one or more TCM levels, and can handle up to 6 TCM levels.
  • the cross unit 11 completes the ODUk service cross connection, and can send the signal output from the tributary unit 12 to any one of the line units 13, and sends the signal outputted by the line unit 13 to any one of the tributary units 12.
  • the branching unit 14 divides the multi-wavelength optical signal into a plurality of optical channel layer signals and outputs them to the line unit 13.
  • the multiplex unit 15 combines the signals of the plurality of optical channel layers and outputs the signals to one optical fiber for transmission.
  • the node networking diagram utilizes the processes described in FIG. 1 and FIG. 2 when processing SNC/S protection, and the protection device described in FIG. 3 and FIG. 4 is utilized, and the following is directed to an ODUk. The specific process of service configuration SNC/S protection is described in detail.
  • Step 100 Specify an ODUk service.
  • Step 101 Determine whether a serial connection monitoring (TCM) allocation has been performed on the ODUk service of this section. If the TCM is not assigned, step 102 is executed, that is, 200 shown in FIG. 2 is executed.
  • TCM serial connection monitoring
  • Step 200 Specify an ODUk service, configured to use TCM in one direction or in both directions.
  • the user specifies that the ODUk service just configured is a one-way use TCM.
  • Step 201 configure TCM1.
  • TCM1 applies to domain 1, and the scope of use is FG.
  • Step 202 Non-intrusive monitoring configuration in the interval. For example, user configuration does not require non-intrusive monitoring.
  • Step 203 Is there another level of TCM to be configured? For example, if the user selects yes, then step is performed.
  • Step 201 configure TCM2.
  • User Configuration TCM2 is applied to Domain 2 and is used in FGHL.
  • Step 202 Non-intrusive monitoring configuration in the interval. For example, user configuration does not require non-intrusive monitoring.
  • Step 203 Is there another level of TCM to be configured? For example, if the user selects No, step 204 is performed. Step 204, prompting the user to assign a result, that is, prompting the relationship of each level of the TCM and the relationship with the cross function.
  • the NMS displays the previous configuration results for TCM1 and TCM2. Two FCMs are used at the F node. If the F node is selected, the TCM function displayed on the F node is completed by the device shown in Figure 3 and 4. The flow execution order is first TCM1 and then TCM2. The source function of TCM1 is completed in the branch unit, and the source function of TCM2 is completed in the line unit.
  • Step 205 the user confirms whether to agree. For example, the user chooses to agree.
  • the NMS sends the configuration to the device.
  • the TCM1 is in the operation mode.
  • the receiving node of the G node is in the operating mode.
  • the TCM2 in the sending direction of the F node is in the operating mode.
  • the receiving direction of the L node is TCM2. Then step 207 is performed.
  • Step 207 related configuration of other TCMs.
  • the corresponding configuration interface is provided to the user according to the usage of different nodes.
  • TTI For node F that starts to use TCM1, ask the user to configure the attributes of TCM1 transmission: TTI should be sent. For node F that starts to use TCM2, please configure the attributes of TCM2 transmission: TTI should be sent.
  • the parameters of the G-configuration of the sink node such as the BIP8 threshold, the receivable TTI, the path tracking identifier mismatch follow-up enable, the LTC insertion alarm indication AIS, etc.; for the TCM2, the F-direction of the F-node is configured as the operation mode.
  • the node L configuration related parameters such as ⁇ 8 threshold, should be issued, receivable TTI, road Trail tracking identifier mismatch follow-up enable, LTC insert AI S, etc.
  • Step 208 enabling or disabling the TCM.
  • the user configures the TCM1 function to be disabled.
  • the system internally disables the prohibition of the TCM1 to be sent to the sink node G that uses the TCM.
  • the system internally disables the prohibition of the TCM1 source function.
  • the user is configured to disable the TCM2 function.
  • the system internally disables the prohibition of the TCM2 to be sent to the sink node G using the TCM.
  • the system internally disables the prohibition of the TCM2 to the use of the TCM2 source function.
  • the source node of TCM? the TCM function is disabled first, and then the SNC/S related functions are configured and then enabled;
  • Step 209 the end. Then proceed to step 103 shown in Figure 1.
  • Step 103 Configure the SNC protection monitoring mode. For example, the user selects the monitoring mode for sub-layer monitoring.
  • Step 104 Determine whether the monitoring mode is configured as sub-layer monitoring (/S)? Yes, then perform the steps
  • Step 106 Configure SNC/S parameters. By performing this step, the SNC/S protected dual-node and the selective node are obtained, and the working service path and the protection service path are obtained.
  • Protection 1 Dual-node? Select the node G, the working service path is FG, use TCM1; protect the service path to FBCG, use TCM1.
  • Protection 2 Dual-node? , Select node L, work service path is FGHL, use TCM2; protect business path to FJKL, use TCM2.
  • the source functions of TCM1 and TCM2 are required at the F node, and the signal flows along the F node.
  • the functions of the respective functional units are: signals from the line unit 131 to the intersecting unit 11 to the line unit 132, and the TCM1 is executed at the line unit 131.
  • the source function performs the source function of the TCM 2 at the line unit 132. It is equivalent to controlling the execution sequence between different levels of TCM and between TCM and cross unit 11. The result is that according to the signal flow direction, the source function of TCM1 is processed first, then to the cross unit 11, and then the source function of TCM2 is processed.
  • the functional units that pass the signal to the direction of the B node are:
  • Wave splitting unit 14 line unit 131, cross unit 11, branch unit 12, cross unit 11, line unit 131, multiplex unit 151;
  • the functional units that pass the signal to the G node are:
  • Wave splitting unit 14 line unit 131, cross unit 11, branch unit 12, cross unit 11, line Road unit 132, multiplex unit 152;
  • the functional units that pass the signal to the J node are:
  • a splitting unit 14 a line unit 131, a cross unit 11, a branch unit 12, a cross unit 11, a line unit 133, a multiplex unit 153;
  • TCM1 is processed in the branch unit, and 1 ⁇ 2 is processed in the line unit 131, 132, 133;
  • the process may be specified by the user configuration, or may be automatically allocated by the system;
  • the TCM related configuration and SNC/S related configuration have been completed, so at this time, the user configuration enables TCM1, and the user configuration enables TCM2;
  • Step 107 ending;
  • the different levels of TCMs are executed in the same order in the same node.
  • the units that perform different levels of TCM are determined according to the signal flow direction and the positional relationship between the units in the same node; and further, different levels of TCMs are executed in the same node in a specified order.
  • the signal flow direction of TCM1 is FG and FBCG, and the functional unit used is the branch unit 12 shown in FIG. 4, and the signal flow direction of TCM2 is FGHL, FJKL, and the functional unit used is the line unit 131 shown in FIG. , 132, 1 33;
  • the ODUk service signal passes the source function of the TCM1 after the F node passes the signal.
  • the signal is also sent to the 7 B, G, J directions, of which only the J direction is correct.
  • the G node it will be found that the signals from the two service paths of FG and FBCG have the LTC alarm of TCM1. The alarm indicates that the signals coming from the two service paths have signal failure, but the signal quality. The same is true, no protection switching occurs.
  • the TIM alarm is detected at the G node. If the TIM insertion AIS function is configured as disabled, no signal indication is inserted down the G node.
  • the L-node will find that the signals from the two service paths FGHL and FJKL are normal. From the previous assumptions, we know that only the signal from FJKL is correct, the signal from FGHL. It is wrong. Therefore, according to the description of the TCM function in the prior art in the above assumption, the protection switching can lead to erroneous conclusions.
  • the F node receives the signal of the E node direction, and the signal is sent to three different directions of B, G, and J;
  • the signal from the tributary unit 12 is only sent to the line unit 133, and the line unit 117 and the line unit 132 receive an erroneous signal from the cross unit 11, and do not contain the correct customer service.
  • the TCM1 is not processed correctly by the tributary unit 12.
  • the signals of the G node and the B node sent by the F node received by the G node are all LTC alarms;
  • the H node will find that the G node has an AI S defect, and the signal from the K node has no AI S defect. Therefore, the K direction signal is selected.
  • the present invention configures the TCM in the SNC/S protection, configures related content that the TCM needs to be configured when the multi-level TCM is used together, and the sequence of execution of different levels of TCM and the positional relationship between the TCM and the ODUk service cross function. SNC/S protection is implemented and the problem of cooperation between multiple SNC/S is solved.
  • the present invention further discloses another embodiment of implementing a k-th optical channel data unit sub-layer monitoring sub-network connection protection device, including: a TCM allocation processing unit, configured to allocate a TCM for a specified ODUk service, if The same node in the 0DUK service allocates different levels of TCMs, and the different levels of TCMs are executed in the same order in the same node; and the SNC/S protection configuration unit is configured to configure the SNC for the ODUk service. /S protection.
  • the TCM allocation unit specifically includes: a TCM allocation unit, configured to allocate a used TCM for each node in the ODUk service; and a TCM execution unit, configured to execute a TCM allocated to each node, if the same is allocated to the same.
  • the TCMs of different levels of the nodes execute the different levels of TCMs in the specified order within the same node.
  • the TCM execution unit reference may be made to the internal structure of the SNC/S protection device shown in FIG. 3, which mainly includes a tributary unit, a line unit, a cross unit, a splitting unit, and a multiplex unit, if assigned to the same node.
  • Different TCM levels each unit performing different levels of TCM performs different levels of TCM according to the signal flow direction and the relative positional relationship between the units in a specified order.

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Description

实现 k阶光通道数据单元子层监视子网连接保护方法及装置 本申请要求于 2006 年 9 月 11 日提交中国专利局、 申请号为 200610152098. 8 ,发明名称为 "实现 k阶光通道数据单元子层监视子网连接保 护方法及装置"的中国专利申请的优先权,其全部内容通过引用结合在本申请 中。
技术领域
本发明涉及光传送网领域,尤其涉及一种实现 k阶光通道数据单元子层监 视的子网连接保护方法及装置。
背景技术
光传送网络(OTN, Opt ica l Transpor t Network )是一组可以为客户层信 号提供主要在光域上进行传送、 复用、 选路、 监控和生存性处理的功能实体, 是传统的点到点传输的波分复用技术的发展。
光传送网络包括光信道(Och, Optical channel)层、 光复用段(0MS,
Optical Multiplex Section)层、 和光传输段层 (OTS, Optical Transmission Section) , 客户层信号首先进行数字包封, 然后映射到 OCh层, 再复用到 0MS 层, 之后经 0TS层在光缆上传输。 各子网一般分属于不同的运营商, 也可能由 不同的运营商进行相应的管理和维护, 为保证各自信号传输的质量,各运营商 可能采用各种保护方式进行保护。在实现本发明过程中,发明人发现现有协议 中对子网连接保护 ( SNCP, Subnetwork Connection Protection ) 的描述, 只 是从需求角度出发,描述了对 SNCP的需求,对于如何实现 SNCP则没有具体说 明, 对于采用子层监视方式的子网连接保护 (SNC/S , SNCP with Sub-layer monitoring ) 的实现方法及其装置, 也没有相关的描述。
OCh层由三部分组成, 即 k阶光通道传送单元( OTUk )、 k阶光通道数据单 元(0DUk )、 k阶光通道净荷单元( OPUk )。 其中 k表示级别, 标准化的级别有 1, 2 , 3。
发明内容
本发明提供一种实现 ODUk子层监视子网连接保护的方法及装置, 能够实 现 ODUk SNC/S保护,并实现了多个 SNC/S之间的相互配合。
本发明提供一种实现 k阶光通道数据单元子层监视子网连接保护的方法, 包括: 为 k阶光通道数据单元 ODUk业务分配串接连接监视 TCM,如果为所述 ODUK 业务中同一个节点分配不同级别的 TCM,则所述不同级别 TCM在所述同一个节点 内按照指定的先后次序执行; 为所述 ODUk业务配置子层监视子网连接保护 SNC/S保护。
本发明还提供一种实现 k阶光通道数据单元子层监视子网连接保护的装 置,包括: TCM分配处理单元,用于为指定的 ODUk业务分配 TCM,如果为所述 0DUK 业务中同一个节点分配不同级别的 TCM,则所述不同级别的 TCM在所述同一个节 点内按照指定的先后次序执行; SNC/S保护配置单元, 用于为所述 ODUk业务配 置 SNC/S保护。
本发明还提供一种实现 k阶光通道数据单元子层监视子网连接保护的方 法, 包括: 配置或者指定一 ODUk业务, 为此 ODUk业务配置 TCM, 以及配置 SNC/S 保护。
本发明还提供一种实现 k阶光通道数据单元子层监视子网连接保护装置, 包括:
支路单元, 用于用户信号与 ODUk业务信号间的转换,将来自交叉侧的 ODUk 业务信号进行 TCM的源或者宿功能处理后 , 再送到支路单元的交叉侧或者用户 侧; 或者将来自用户侧的用户信号进行 TCM的源或者宿功能处理后, 再送到支 路单元的交叉侧或者用户侧;
线路单元,用于光通道层信号与光数据单元信号间的转换,将来自交叉侧 的 ODUk业务信号进行 TCM的源或者宿功能处理后 , 再送到线路单元的交叉侧或 者线路侧; 或者将来自线路侧的 OCh业务信号进行 TCM的源或者宿功能处理后, 再送到线路单元的交叉侧或者线路侧;
交叉单元, 用于 ODUk业务的交叉连接,将从来自支路单元的信号送给任意 一个线路单元或支路单元;或者将来自线路单元的信号送给任意一个支路单元 或线路单元;
分波单元, 用于将多波长光信号分成多个光通道层信号输出给线路单元; 合波单元,用于将多个光通道层信号合并到一起,输出到一根光纤中传送。 从以上技术方案可以看出,本发明通过在 SNC/S保护中分配串接连接监视 TCM、 以及在为同一节点分配不同级别 TCM时, 所述不同级别 TCM在同一节点 内按照指定的先后次序执行,从而实现了 SNC/S保护, 以及多个 SNC/S之间配 合使用。
附图说明
图 1为本发明中 SNC/S保护方法的实施例流程图;
图 1为本发明中配置串接连接监视的实施例流程图;
图 3为本发明中 SNC/S保护装置的实施例框图;
图 4为本发明中保护装置的具体实施方式一的框图;
图 5为本发明中一 ODUk业务的节点组网示意图。
具体实施方式
下面, 结合附图对本发明各实施例进行伴细描述。
如图 1所示为配置 SNC/S的流程图, 其具体步骤如下:
步骤 100, 指定 ODUk业务。
步骤 101,判断是否已经对本条 ODUk业务进行了串接连接监视( TCM, Tandem connect ion moni tor ing )分配?
如果是则执行步骤 103; 否则执行步骤 102, 对本条 ODUk业务分配 TCM, 其 具体如何实现 TCM的分配, 详细见图 2;
步骤 103, 配置 SNC保护监视方式。
SNC包含的监视方式包括 /S, /N, / 1, 其中,
SNC/I表示固有监视的 SNC, Inherent ly moni tored SNC,
SNC/N表示非介入监视的 SNC, non-intrus ive moni tored SNC,
SNC/S表示子层监视的 SNC, sub-layer moni tored SNC;
步骤 104 , 判断配置的监视方式是否为子层监视 (即是否为 SNC〃S )?如果 是则执行步骤 106; 否则执行步骤 105。
步骤 105, 配置其他监视方式的 SNC参数,对于选择了 /S以外的其他监视方 式, 本专利不涉及。
步骤 106, 配置 SNC/S参数。 通过执行此步骤得到 SNC/S保护的双发节点和 选收节点, 得到工作业务路径和保护业务路径、 得到本保护对应的 TCM级别, 确定了本保护与其他 SNC保护的关系。
步骤 107, 结束。 图 2所示为 ODUk业务分配 TCM的流程图 , 其具体步骤如下:
步骤 200, 指定某个 ODUk业务, 在此步骤中, 需要用户选择进行 TCM分配的 0DU业务, 并明确是单向使用 TCM还是双向使用 TCM。
步骤 201, 配置某个级别 TCM。
步骤 202, 区间内非介入监视配置, 在 ODUk业务路径上, 在使用此级别 TCM 的节点范围内, 用户指定需要进行非介入监视的节点。
步骤 203,是否还要配置其他级别 TCM?是则再执行步骤 201; 否则执行步骤
204。
步骤 204,提示用户分配结果, 包括各个等级 TCM在不同节点间的分配结果 和各个等级 TCM在同一个节点内处理的先后次序关系及与交叉功能的位置关 系。
步骤 205, 由用户确认是否同意。 如果用户同意前述的分配, 则网管把前 面自动分配和配置的结果下发给节点设备, 然后执行步骤 207; 否则执行步骤 206。
步骤 206 , 用户调整各个功能,提供图形界面让用户调整各个功能的关系, 如可调整不同级别的 TCM在不同节点间的分配及在同一个节点内处理的次序。
步骤 207, 其他 TCM的相关配置, 前一步确定后, 据前一步骤对 TCM的分 配结果, 对每个级别的 TCM, 根据在不同节点的使用情况提供相应的配置界面 给用户。
对于使用某个等级 TCM的源节点, 则要用户设置发送方面的属性, 包括配 置应发 TTI ( Trai l Trace Ident if ier , 路径踪迹标识符)等。
对于使用某个等级 TCM的宿节点, 则要用户设置接收方面的属性, 所述设 置接收方面的属性包括下述内容中的一个或多个: 配置是否使能对后续 ODUk 路径进行维护信号的下插, 配置是否把 TCM的信号失效和信号劣化信息传递到 后续层次, 配置路径踪迹标识符失配(TIM, Trace Identifier Mismatch )后 继行动使能设置和串接连接丢失(LTC, Loss of tandem connection )后续行 动使能设置, 设置 TCM应收路径跟踪标识(TTI ), 设置 TCM的 TIM检测模式, 设 置 TCM的 8位比特间插奇偶校验( BIP-8 )告警门 P艮,配置是否把锁定的缺陷( LCK, Locked defect )^ 开路指示 ( 0CI , Open connection indication )作为插入 告警指示 ( AIS, Alarm Indication Signal ) 的条件。
如果配置使能对后续 ODUk路径进行维护信号的下插, 则对状态域(STAT ) 等开销和净荷根据配置和前面接收到的信号情况进行维护信号的插入, 其中, 对维护信号的定义符合 G. 709中 16. 5的定义。
如果配置把 TCM的信号失效和信号劣化信息传递到后续层次, 则当检测到 作为后续行动路径信号失效(aTSF, Trail Signal Fail ),后续行动服务信号 失效( aSSF, Server Signal Failure )的缺陷时向后续层次传递 TSF/SSF信息。
如果配置了 LTC后续行动使能, 则当发现 LTC缺陷时,对 STAT等开销和净荷 进行维护信号 AIS的插入, 并向后续层次传递 TSF/SSF信息。
如果配置把锁定的缺陷( LCK )作为插入告警指示 AIS的条件, 则当检测到
LCK缺陷时插入 AIS。
如果配置把开路指示(0CI )作为插入告警指示 AIS的条件,则当检测到 0CI 缺陷时插入 AIS。
对于使用某个等级 TCM的中间节点, 如果没有配置使能非介入监视, 则不 需要其他配置。 如果配置为使能非介入监视, 则还需要配置: 配置是否把 TCM 的信号失效和信号劣化信息传递到后续层次, 配置 TIM后继行动使能设置和串 接连接丢失 LTC后续行动使能设置,设置 TCM应收 TTI ,设置 TCM的 TIM检测模式, 设置 TCM的 BIP-8告警门限。
步骤 208, 使能或禁止 TCM。
可对每个级别的 TCM对使用 TCM功能的源节点和宿节点分别配置使能或禁 止。 如果配置为使能, 则按照设置的 TCM属性进行处理, 对于使用某个等级 TCM 的源节点, 把配置的应发 TTI插入到该级别 TCM的开销中, 计算 BIP-8并插入到 开销中, 另外 据对应的源功能的情况进行 BDI ( Backward defect indicator , 后向缺陷指示) ,ΒΕΙ ( Backward error indicator , 后向误码指示) , BIAE ( Backward incoming al ignment error , 后向进入定位错误) 的插入。 对于 使用某个等级 TCM的宿节点, 根据配置的 TCM相关的属性, 对 TCM进行监视, 并 上报该级别 TCM告警性能,如果配置了与该级别 TCM相关的保护组, 则开始«艮 据该级别 TCM得到的一些缺陷作为保护倒换条件进行保护倒换。 如果配置为禁 止, 则不对该级别 TCM进行处理。 209 , 结束。
如图 3所示, 为本发明 SNC/S保护装置 20的框图 , 该保护装置 20包括: 交叉单元 21、 支路单元 22、 线路单元 23、 分波单元 24和合波单元 25 , 其中, 根据实际需要, 支路单元 22还包括支路单元 221、 222 22n, 线路单元 23包括 231、 232 23η, 分波单元 24包括分波单元 241 24η, 合波 单元 25包括 251 25η; 其中, 各个单元的作用及其相互关系参见图 4所 示的关于该装置的一实施例。
图 4所示, 为 SNC/S保护装置的一实施例, 该装置 10包括交叉单元 11、 一个支路单元 12、 一个线路单元 13、 分波单元 14和一个合波单元 15 , 其中, 线路单元 11 包括线路单元 131、 线路单元 132、 线路单元 133, 合波单元 15 包括合波单元 151、合波单元 152以及合波单元 153。 下面分别予以详细描述。
支路单元 12用于完成用户信号与 ODUk业务信号间的转换。支路单元 12的一 端为用户侧, 用于用户信号的输入和用户信号的输出; 另一端为交叉侧, 连接 交叉单元 11 , 用于 ODUk业务信号的输入和输出。
ODUk业务信号的路径是可配置的, 即在支路单元 12中,可以把交叉侧或者 用户侧送来的信号进行 TCM的源或者宿功能处理后 , 再送到支路单元 12的交叉 侧或者用户侧。 例如, 当用户信号进入支路单元 12后, 该单元对输入的用户信 号进行 ODUk层次到客户信号的适配源功能处理、 ODUkP层次终结源功能处理、 一个或多个 ODUk串接连接监视子层到 ODUk层次的适配源功能处理、及一个或多 个 ODUkT层次的终结源处理, 此后再送到交叉单元 11; 当 ODUk信号从交叉单元 11进入支路单元 12后, 该单元对输入的 ODUk信号进行一个或多个 ODUkT层次的 终结宿功能处理、一个或者多个 ODUk串接连接监视子层到 ODUk层次的适配宿功 能处理、 ODUk层次的终结宿功能处理、 ODUk层次到客户信号的适配宿功能处理 等, 此后再送到用户侧。
其中, TCM功能在支路单元 12是可选的, 可以包含一个或者多个 TCM级别, 最多可以出来 6个 TCM级别。
线路单元 13用于完成光通道层信号与光数据单元信号间的转换。线路单元 1 3的一端为交叉侧, 连接交叉单元 11 , 用于 ODUk业务信号的输入和输出; 另一 端为线路侧,用于接收分波单元 14输入的光通道层信号以及将光通道层信号输 出给合波单元 15。
ODUk业务信号的路径是可配置的,即线路单元 13可以把交叉侧或者线路侧 送来的信号进行 TCM的源或者宿功能处理后 , 再送到线路单元 13的交叉侧或者 线路侧。 例如, 当 ODUk信号从交叉单元 11进入所述线路单元 1 3后, 线路单元 13 对输入的 ODUk信号进行一个或多个 ODUk串接连接监视子层到 ODUk层次的适配 源功能处理、 一个或者多个 ODUkT层次终结源功能处理、 k阶光信道传送单元 OTUk层次到 ODUk层次的适配源功能处理、 OTUk层次的终结源功能处理、光通道 层 OCh层次到 OTUk层次的适配源处理、和 OCh层次的终结源功能处理等,此后再 送到合波单元 15; 当信号从分波单元 14进入线路单元时, 即线路单元 13对分波 单元 14输入的光信通道层信号进行 OCh层次的终结宿功能处理、 OCh层次到 OTUk 层次的适配宿功能处理、 OTUk层次的终结宿功能处理、 OTUk层次到 ODUk层次的 适配宿功能、一个或多个 ODUk串接连接监视子层的终结宿功能、和一个或者多 个 ODUk串接连接监视子层到 ODUk层次的适配宿功能处理之后再送到交叉单元 11。
其中, TCM功能在线路单元 13是可选的, 可以包含一个或者多个 TCM级别, 最多可以处理 6个 TCM级别。
交叉单元 11完成 ODUk业务交叉连接,能够把支路单元 12向其输出的信号送 给任意一个线路单元 13,把线路单元 13向其输出的信号送给任意一个支路单元 12。
分波单元 14 , 将多波长光信号分成多个光通道层信号输出给线路单元 13。 合波单元 15 , 将多个光通道层信号合并到一起, 输出到一根光纤中传送。 如图 5所示的节点组网示意图, 其在处理 SNC/S保护时会利用到图 1、 图 2 所述的流程, 会利用到图 3、 图 4所述的保护装置, 下面针对一 ODUk业务配置 SNC/S保护的具体过程进行详细说明。
参见图 1、 图 2所示,
步骤 100, 指定 ODUk业务。
用户指定 ODUk业务的源节点为 A,宿节点为?、指定 ODUk业务中间经过的节 点为 EFGHL,并为源节点 A和宿节点 P配置参数, 如 BIP - 8门限、 TTI、 应收 ΤΤΙ、 路径跟踪标识符失配后续行动使能等。 步骤 101,判断是否已经对本条 ODUk业务进行了串接连接监视( TCM )分配? 若没有分配 TCM, 则执行步骤 102, 即执行图 2所示的 200。
步骤 200, 指定 ODUk业务, 配置为单向还是双向使用 TCM。 例如, 用户指定 刚刚配置的 ODUk业务为单向使用 TCM。
步骤 201, 配置 TCM1。 例如, 用户配置 TCM1应用于域 1, 使用范围为 FG。 步骤 202, 区间内非介入监视配置。 例如, 用户配置不需要非介入监视。 步骤 203, 是否还要配置其他级别 TCM?例如, 用户选择是, 则再执行步骤
201。
步骤 201, 配置 TCM2。 用户配置 TCM2应用于域 2, 使用范围为 FGHL。
步骤 202, 区间内非介入监视配置。 例如, 用户配置不需要非介入监视。 步骤 203,是否还要配置其他级别 TCM?例如,用户选择否,则执行步骤 204。 步骤 204 ,提示用户分配结果, 即提示各个等级 TCM的关系及与交叉功能关 系。
网管显示前面对 TCM1和 TCM2的配置结果, 在 F节点开始使用了两个 TCM级 另 用户如果选择 F节点, 则显示在 F节点 TCM功能通过如图 3、 4所示的设备完 成, 据信号流向执行顺序为先 TCM1、后 TCM2。 其中 TCM1的源功能在支路单元 完成, TCM2的源功能在线路单元完成。
步骤 205, 由用户确认是否同意。 例如, 用户选择同意。 网管向设备下发 配置 F节点的发方向 TCM1为操作模式, 配置 G节点的收方向 TCM1为操作模式, 配 置 F节点的发方向 TCM2为操作模式, 配置 L节点的收方向 TCM2为操作模式。 然后 执行步骤 207。
步骤 207, 其他 TCM的相关配置。 对每个级别的 TCM, 根据在不同节点的使 用情况提供相应的配置界面给用户。
对开始使用 TCM1的节点 F,请用户配置 TCM1发送方面的属性: 应发 TTI等。 对开始使用 TCM2的节点 F,请用户配置 TCM2发送方面的属性: 应发 TTI等。
并对 TCM1的源节点?、 宿节点 G配置相关的参数, 如 BIP8门限、 应收 TTI、 路径跟踪标识符失配后续行动使能、 LTC下插告警指示 AI S等; 对于 TCM2 , 配置 F节点的发方向 TCM2为操作模式, 配置 L节点的收方向 TCM2为操作模式, 并对 TCM2的源节点?、 宿节点 L配置相关参数, 如 ΒΙΡ8门限、 应发 ΤΤΙ、 应收 TTI、 路 径跟踪标识符失配后续行动使能、 LTC下插 AI S等。
步骤 208, 使能或禁能 TCM。 例如, 用户配置禁止 TCM1功能, 系统内部把对 TCM1的禁止转换为对 TCM1宿功能的禁止下发给使用 TCM的宿节点 G,系统内部把 对 TCM1的禁止转换为对 TCM1源功能的禁止下发给使用 TCM的源节点?。用户配置 禁止 TCM2功能,系统内部把对 TCM2的禁止转换为对 TCM2宿功能的禁止下发给使 用 TCM的宿节点 G,系统内部把对 TCM2的禁止转换为对 TCM2源功能的禁止下发给 使用 TCM的源节点?。 本实施例中, 先禁止 TCM功能, 等到 SNC/S相关的功能都配 置好后再使能;
步骤 209, 结束。 然后继续执行图 1所示步骤 103。
步骤 103, 配置 SNC保护监视方式。 例如, 用户选择监视方式为子层监视的
SNC。
步骤 104 , 判断是否配置了监视方式为子层监视的(/S )?是, 则执行步骤
106。
步骤 106, 配置 SNC/S参数。 通过执行此步骤得到 SNC/S保护的双发节点和 选收节点, 得到工作业务路径和保护业务路径。
保护 1 : 双发节点?、 选收节点 G, 工作业务路径为 FG, 使用 TCM1 ; 保护业 务路径为 FBCG, 使用 TCM1。
保护 2 : 双发节点?、 选收节点 L, 工作业务路径为 FGHL, 使用 TCM2; 保护 业务路径为 FJKL, 使用 TCM2。
参见图 4, 在 F节点需要 TCM1和 TCM2的源功能, 在 F节点沿信号流向, 各个 功能单元的功能为:信号从线路单元 131到交叉单元 11到线路单元 132,在线路 单元 131执行 TCM1的源功能,在线路单元 132执行 TCM2的源功能。相当于控制了 不同级别 TCM间和 TCM与交叉单元 11之间的执行顺序 , 结果就是按照信号流向 , 先处理 TCM1的源功能,再到交叉单元 11 , 再处理 TCM2的源功能。
向 B节点方向信号经过的功能单元依次为:
分波单元 14 , 线路单元 131, 交叉单元 11 , 支路单元 12 , 交叉单元 11 , 线 路单元 131, 合波单元 151 ;
向 G节点方向信号经过的功能单元依次为:
分波单元 14 , 线路单元 131, 交叉单元 11 , 支路单元 12 , 交叉单元 11 , 线 路单元 132, 合波单元 152;
向 J节点方向信号经过的功能单元依次为:
分波单元 14 , 线路单元 131, 交叉单元 11 , 支路单元 12 , 交叉单元 11 , 线 路单元 133, 合波单元 153;
在 F节点对 TCM1和 TCM2进行源功能的处理,则在支路单元处理 TCM1,在线路 单元 131、 132、 133处理1 ^2;
确定 TCM信号流向及在设备中工作路径和保护路径分别使用的功能单元, 该过程可由用户配置指定, 也可以由系统自动分配;
得到本保护对应的 TCM级别, 确定了本保护与其他 SNC保护的关系。
到这时, TCM相关配置和 SNC/S相关配置都已经完成, 所以, 这时用户配置 使能 TCM1 , 用户配置使能 TCM2;
步骤 107, 结束;
通过上述实施例可以看出 ,如果为 0DUK业务中同一个节点分配不同级别的 TCM,则不同级别 TCM在所述同一个节点内按照指定的先后次序执行。具体而言, 根据信号流向以及同一节点内各单元之间的位置关系 , 确定执行不同级别 TCM 的单元; 进而, 在同一节点内按照指定的先后次序执行不同级别的 TCM。
TCM1的信号流向为 FG和 FBCG,其使用的功能单元为如图 4所示的支路单元 12 , TCM2的信号流向为 FGHL、 FJKL, 其使用的功能单元为如图 4所示的线路单 元 131、 132、 1 33;
假设, ODUk业务信号在经过 F点向下传送时, 只有路径 FJKL传送的信号是 正确的,那么,按照现有技术中关于 TCM的描述, ODUk业务信号在 F节点经过 TCM1 的源功能后, 信号被送到了 B、 G、 J三个方向, 其中只有 J方向才是正确的, 再 经过 TCM2的源功能, 信号也被送到 7 B、 G、 J三个方向, 其中只有 J方向才是正 确的, 这时, 在 G节点, 会发现从 FG、 FBCG两条业务路径过来的信号都有 TCM1 的 LTC告警, 该告警表明从这两条业务路径过来的信号都有信号失效, 但是, 信号质量是一样的, 不发生保护倒换, 同时, 在 G节点还会检测到 TIM告警, 假 如 TIM下插 AI S功能配置为禁止, 所以在 G节点不向下插入任何信号指示;
此时, 在 L节点会发现 FGHL、 FJKL两条业务路径过来的信号都是正常的, 而从前面的假设我们知道只有从 FJKL过来的信号是正确的 ,从 FGHL过来的信号 是错误的, 因此, 依据上述假设中现有技术关于 TCM功能的描述来进行保护倒 换, 会得出错误的结论。
本发明实施例中, 在 F节点接收 E节点方向的信号, 该信号会送到 B、 G、 J 三个不同的方向;
假设, 因为交叉单元 11的错误,从支路单元 12过来的信号只是送到了线路 单元 133, 线路单元 1 31和线路单元 132从交叉单元 11接收到的是错误的信号, 没有包含正确的客户业务,也没有经过支路单元 12对 TCM1进行正确的处理,这 时,在 G节点收到的 F节点发出的 G节点方向和 B节点方向的信号都是有 LTC告警; 利用本发明实施例提到的针对 TCM的配置, 若将 LTC下插 AI S使能, 则到 H 节点会发现 G节点方向有 AI S缺陷, K节点方向过来的信号没有 AI S缺陷, 因此, 选收 K方向信号。
可见, 本发明通过在 SNC/S保护中配置 TCM、 配置在多级别 TCM配合使用时 TCM需要配置的相关内容、 以及不同级别 TCM执行的先后次序及指定 TCM与 ODUk 业务交叉功能的位置关系等, 实现了 SNC/S保护, 并解决了多个 SNC/S之间配合 使用的问题。
此外, 本发明还公开了一种实现 k阶光通道数据单元子层监视子网连接保 护装置的另外一个实施例, 包括: TCM分配处理单元, 用于为指定的 ODUk业务 分配 TCM,如果为所述 0DUK业务中同一个节点分配不同级别的 TCM, 所述不同级 别的 TCM在所述同一个节点内按照指定的先后次序执行;以及 SNC/S保护配置单 元, 用于为所述 ODUk业务配置 SNC/S保护。
其中, 所述 TCM分配单元具体包括: TCM分配单元, 用于为所述 ODUk业务中 的各节点分配所使用的 TCM; 以及 TCM执行单元, 用于执行分配给各节点的 TCM, 如果分配给同一节点不同级别的 TCM, 则在所述同一节点内部按照指定的先后 次序执行所述不同级别的 TCM。 所述 TCM执行单元的具体结构可以参考前述图 3 所示的 SNC/S保护装置内部结构, 主要包括支路单元、 线路单元、 交叉单元、 分波单元以及合波单元, 如果分配给同一节点的 TCM级别不同, 则述执行不同 级别 TCM的各单元, 根据信号流向以及所述各单元之间的相对位置关系按照指 定的先后次序执行不同级别的 TCM。
以上所述仅为本发明的较佳实施例而已, 并不用以限制本发明, 凡在本发 明的精神和原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发 明的保护范围之内。

Claims

权 利 要 求
1、一种实现 k阶光通道数据单元子层监视子网连接保护的方法,其特征在 于, 包括:
为 k阶光通道数据单元 ODUk业务分配串接连接监视 TCM, 如果为所述 0DUK 业务中同一个节点分配不同级别的 TCM,则所述不同级别 TCM在所述同一个节点 内按照指定的先后次序执行;
为所述 ODUk业务配置子层监视子网连接保护 SNC/S保护。
2、 根据权利要求 1所述的方法, 其特征在于, 在所述为 ODUk业务分配 TCM 之前还包括: 指定 ODUk业务;
所述指定 0DUK业务包括: 指定 ODUk业务的源节点和宿节点、指定或者由系 统自动生成 ODUk业务中间经过的节点; 为所述源节点和宿节点配置 TCM相关参 数。
3、 根据权利要求 1所述的方法, 其特征在于, 所述为 ODUk业务配置 SNC/S 保护包括: 为所述 ODUk业务配置一个或者多个 SNC/S保护。
4、 根据权利要求 1所述的方法, 其特征在于, 所述为 ODUk业务配置 SNC/S 保护包括:
指定 SNC/S保护的双发节点和选收节点、 确定工作业务路径、 指定或者由 系统自动生成保护业务路径, 以及在所述 SNC/S保护中使用的 TCM级别。
5、根据权利要求 4所述的方法, 其特征在于, 在所述工作业务路径和保护 业务路径中分别配置有一个 SNC/S保护级别的 TCM。
6、 根据权利要求 1所述的方法, 其特征在于, 所述为 ODUk业务分配 TCM包 括:
当为所述 ODUk业务分配的 TCM有多个级别时 ,将 TCM的信号失效和信号劣化 信息在同一节点内不同层次间传递配置为使能或者禁止; 将 TCM的故障信息在 不同节点间通过维护信号传递配置为使能或者禁止。
7、 根据权利要求 6所述的方法, 其特征在于, 当所述 TCM的信号失效和信 号劣化信息在同一节点内不同层次间传递配置为使能时,需要进一步分配不同 级别 TCM在同一节点内执行的先后次序 ,以及指定 TCM与 ODUk业务交叉单元之间 的位置关系。
8、 根据权利要求 6所述的方法, 其特征在于, 当所述 TCM的故障信息在不 同节点间通过维护信号传递配置为使能时, 需要进一步将所述 TCM的故障信息 配置为: 串接连接丢失作为告警指示的插入条件。
9、 根据权利要求 1所述的方法, 其特征在于, 还包括:
对为所述 0DUK业务分配的各级别 TCM分别配置使能或禁止, 如果配置为使 能, 则按照配置的 TCM属性进行处理; 如果配置为禁止, 则对该级别 TCM不进行 处理。
10、 根据权利要求 9所述的方法, 其特征在于:所述按照配置的 TCM属性进 行处理, 包括如下处理中的一个或多个: 对于使用 TCM的源节点, 执行光通道 数据单元 TCM终结源功能和光通道数据单元 TCM到光通道数据单元适配源功能; 对于使用某个等级 TCM的宿节点,执行光通道数据单元 TCM终结宿功能和光通道 数据单元 TCM到光通道数据单元适配宿功能;如果配置了与该级别 TCM相关的保 护组, 则开始 据该级别 TCM得到的缺陷作为保护倒换条件进行保护倒换。
11、 根据权利要求 1至 10中任意一项所述的方法, 其特征在于, 所述不同 级别 TCM在所述同一个节点内按照指定的先后次序执行包括:
根据信号流向以及同一节点内各单元之间的位置关系 ,确定执行不同级别 TCM的单元;
在同一节点内按照指定的先后次序执行不同级别的 TCM。
12、 一种实现 k阶光通道数据单元子层监视子网连接保护的装置, 其特征 在于, 包括:
TCM分配处理单元, 用于为指定的 ODUk业务分配 TCM,如果为所述 0DUK业务 中同一个节点分配不同级别的 TCM,则所述不同级别的 TCM在所述同一个节点内 按照指定的先后次序执行;
SNC/ S保护配置单元 , 用于为所述 ODUk业务配置 SNC/S保护。
1 3、 根据权利要求 11所述的装置, 其特征在于, 所述 TCM分配单元具体包 括:
TCM分配单元, 用于为所述 ODUk业务中的各节点分配所使用的 TCM;
TCM执行单元, 用于执行分配给各节点的 TCM,如果分配给同一节点不同级 别的 TCM, 则在所述同一节点内部按照指定的先后次序执行所述不同级别的 TCM。
14、 根据权利要求 1 3所述的装置, 其特征在于, 所述 TCM执行单元包括: 支路单元, 用于用户信号与 ODUk业务信号间的转换,将来自交叉侧的 ODUk 业务信号进行 TCM的源或者宿功能处理后 , 再送到支路单元的交叉侧或者用户 侧; 或者将来自用户侧的用户信号进行 TCM的源或者宿功能处理后, 再送到支 路单元的交叉侧或者用户侧;
线路单元,用于光通道层信号与光数据单元信号间的转换,将来自交叉侧 的 ODUk业务信号进行 TCM的源或者宿功能处理后 , 再送到线路单元的交叉侧或 者线路侧; 或者将来自线路侧的 OCh业务信号进行 TCM的源或者宿功能处理后, 再送到线路单元的交叉侧或者线路侧;
交叉单元, 用于 ODUk业务的交叉连接,将来自支路单元的信号送给任意一 个线路单元或支路单元;或者将来自线路单元的信号送给任意一个支路单元或 线路单元;
分波单元, 用于将多波长光信号分成多个光通道层信号输出给线路单元; 合波单元,用于将多个光通道层信号合并到一起,输出到一根光纤中传送; 如果分配给同一节点的 TCM级别不同, 则上述执行不同级别 TCM的各单元, 根据信号流向以及所述各单元之间的相对位置关系按照指定的先后次序执行 不同级别的 TCM。
15、 一种实现 k阶光通道数据单元子层监视子网连接保护的方法, 其特征 在于, 包括:
配置或者指定一 ODUk业务, 为此 ODUk业务配置 TCM, 以及配置 SNC/S保护。
16、 根据权利要求 15所述的方法, 其特征在于, 所述为 ODUk业务配置 TCM 包括:
当在 ODUk业务中配置的 TCM有多个级别时,将 TCM的信号失效和信号劣化信 息在同一节点内不同层次间传递配置为使能或者禁止, 将 TCM的故障信息在不 同节点间通过维护信号传递配置为使能或者禁止。
17、 根据权利要求 16所述的方法, 其特征在于, 当 TCM的信号失效和信号 劣化信息在同一节点内不同层次间传递配置为使能时,需要进一步配置不同级 别 TCM执行的先后次序及指定 TCM与 ODUk业务交叉功能的位置关系。
18、 一种实现 k阶光通道数据单元子层监视子网连接保护的装置, 其特征 在于, 包括:
支路单元, 用于用户信号与 ODUk业务信号间的转换,将来自交叉侧的 ODUk 业务信号进行 TCM的源或者宿功能处理后 , 再送到支路单元的交叉侧或者用户 侧; 或者将来自用户侧的用户信号进行 TCM的源或者宿功能处理后, 再送到支 路单元的交叉侧或者用户侧;
线路单元,用于光通道层信号与光数据单元信号间的转换,将来自交叉侧 的 ODUk业务信号进行 TCM的源或者宿功能处理后 , 再送到线路单元的交叉侧或 者线路侧; 或者将来自线路侧的 OCh业务信号进行 TCM的源或者宿功能处理后, 再送到线路单元的交叉侧或者线路侧;
交叉单元, 用于 ODUk业务的交叉连接,将从来自支路单元的信号送给任意 一个线路单元或支路单元;或者将来自线路单元的信号送给任意一个支路单元 或线路单元;
分波单元, 用于将多波长光信号分成多个光通道层信号输出给线路单元; 合波单元,用于将多个光通道层信号合并到一起,输出到一根光纤中传送。
19、根据权利要求 18所述的装置,其特征在于,如果分配给同一节点的 TCM 级别不同, 则上述执行不同级别 TCM的各单元, 根据信号流向以及所述各单元 之间的相对位置关系按照指定的先后次序执行不同级别的 TCM。
20、 根据权利要求 18或 19所述的装置, 其特征在于,
当用户信号进入支路单元, 所述支路单元用于对所述用户信号进行 ODUk 层次到客户信号的适配源功能处理、 ODUkP层次终结源功能处理、 一个或多个 ODUk串接连接监视子层到 ODUk层次的适配源功能处理、 及一个或多个 ODUkT层 次的终结源处理, 之后送到交叉单元;
当 ODUk信号从交叉单元进入支路单元,所述支路单元用于对 ODUk输入信号 进行一个或多个 ODUkT层次的终结宿功能处理、 一个或者多个 ODUk串接连接监 视子层到 ODUk层次的适配宿功能处理、 ODUk层次的终结宿功能处理、 ODUk层次 到客户信号的适配宿功能处理, 之后送到客户侧;
当 ODUk信号从交叉单元进入所述线路单元,所述线路单元用于对所述 ODUk 信号进行一个或多个 ODUk串接连接监视子层到 ODUk层次的适配源功能处理、一 个或者多个 ODUkT层次终结源功能处理、 k阶光信道传送单元 OTUk层次到 ODUk 层次的适配源功能处理、 OTUk层次的终结源功能处理、光通道层 OCh层次到 OTUk 层次的适配源处理、 和 OCh层次的终结源功能处理, 之后送到合波单元;
当光通道层信号从分波单元进入线路单元,所述线路单元用于对所述光通 道层进行 OCh层次的终结宿功能处理、 OCh层次到 OTUk层次的适配宿功能处 理、 OTUk层次的终结宿功能处理、 OTUk层次到 ODUk层次的适配宿功能、 一个 或多个 ODUk串接连接监视子层的终结宿功能、和一个或者多个 ODUk串接连接 监视子层到 ODUk层次的适配宿功能处理之后送到交叉单元。
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