WO2012162982A1 - 一种aps业务通道切换方法、系统及自动保护倒换设备 - Google Patents

一种aps业务通道切换方法、系统及自动保护倒换设备 Download PDF

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Publication number
WO2012162982A1
WO2012162982A1 PCT/CN2011/079848 CN2011079848W WO2012162982A1 WO 2012162982 A1 WO2012162982 A1 WO 2012162982A1 CN 2011079848 W CN2011079848 W CN 2011079848W WO 2012162982 A1 WO2012162982 A1 WO 2012162982A1
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state
recovery
wtr
fault
failure
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English (en)
French (fr)
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万全高
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201180003984.3A priority Critical patent/CN103119893B/zh
Priority to ES11864603.3T priority patent/ES2655637T3/es
Priority to PCT/CN2011/079848 priority patent/WO2012162982A1/zh
Priority to EP11864603.3A priority patent/EP2557732B1/en
Priority to US13/667,419 priority patent/US8908506B2/en
Publication of WO2012162982A1 publication Critical patent/WO2012162982A1/zh
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to an APS service channel switching method, system, and automatic protection switching device.
  • ETH Automatic Protection Switching, APS
  • G.8031 which defines 1+1/1:1, unidirectional/bidirectional, recovery/non-recovery switching modes, and gives various application scenarios and processing procedures.
  • ETH Automatic Protection Switching, APS
  • G.8031 if current protection The group is in 1+1 bidirectional recovery or 1:1 bidirectional recovery protection mode.
  • the protection switchover will be triggered to switch the service from the working channel to the protection channel. After a period of time, if the working channel is restored, the SF alarm disappears, and the switchback is prevented from being caused by the fault of the working channel.
  • WTR Waiting for Recovery first
  • the duration of the WTR is determined by the WTR timer threshold (generally defined by the network maintainer).
  • the WTR timer threshold generally defined by the network maintainer.
  • the channel that is, when the two ends are different, the recovery end enters the WTR state after the fault, and after the WTR time is exhausted, both ends simultaneously switch back to the working channel.
  • the recovery end does not enter the WTR state, so the user cannot know the WTR state of the recovery end and then switch back to the working channel, and if the WTR time of the recovery end configuration is greater than the WTR time of the later recovery end configuration Then, the fault recovery first may occur when the WTR time is not exhausted and then cut back to the working channel, and the customer needs to be cut back to the working channel after the WTR time is recovered.
  • the object of the present invention is to provide an APS service channel switching method, which is intended to solve the problem that when the APS service channel is switched, the user cannot know the WTR state of the first recovery end and then switch back to the working channel, and if the WTR of the recovery end is configured first. If the time is greater than the WTR time configured on the recovery side, the failure may first return to the working channel when the WTR time is not exhausted, and the problem that the customer needs of the working channel after the WTR time has not been recovered after the working channel is restored is not satisfied. .
  • the present invention is implemented by the present invention.
  • the present invention provides an automatic protection switching APS service channel switching method, where the method includes:
  • the recovery terminal sends the information waiting for the recovery of the WTR state, and the current state of the fault recovery first is the first NR state, and the state before the first NR state is the SF state.
  • the first NR state is no request, the selected protection channel state, the SF state is a signal failure, and the protection channel state is selected;
  • the fault When the fault first recovers the WTR time exhausted information sent by the recovery end, and the fault first restores the WTR time, the fault first enters the second NR state, and the second NR state is no request. Select the working channel status.
  • the present invention further provides an automatic protection switching APS service channel switching method, where the method includes:
  • the recovery end When the recovery end receives the WTR time exhausted information sent by the recovery side after the failure, and the WTR time of the recovery end is exhausted after the failure, the recovery end enters the second NR state after the failure, and the second NR state is no request. Select the working channel status.
  • An embodiment of the present invention further provides an automatic protection switching APS service channel switching method, where the method includes:
  • the recovery terminal When the recovery terminal enters the WTR state after the failure, the information is sent to the recovery first recovery terminal to wait for recovery of the WTR state;
  • the fault first recovers the information of the WTR state sent by the recovery terminal after receiving the fault, and the fault first recovers before the current state of the recovery end is the first NR state and the state before the first NR state is the SF state.
  • the first NR state is no request
  • the SF state is a signal failure
  • the fault recovery first end and the fault recovery end are respectively cut back from the protection channel to the working channel.
  • An embodiment of the present invention further provides an automatic protection switching device, where the automatic protection switching device includes:
  • the WTR state unit is configured to enter a message waiting for the recovery of the WTR state sent by the recovery terminal after the fault recovery terminal receives the fault, and the current state of the fault recovery first is the first NR state, and the state before the first NR state is switched. When it is in the SF state, it enters the WTR state;
  • the switching unit is configured to: when the fault recovery first end receives the fault, the WTR time exhausted information sent by the recovery end, and when the fault first recovery end WTR time is exhausted, the fault first recovery end enters the second NR state, the second The NR state is no request, and the working channel state is selected.
  • An embodiment of the present invention further provides an automatic protection switching device, where the automatic protection switching device includes:
  • the information sending unit is configured to send information to enter the WTR state to the fault recovery first end when the recovery terminal enters the WTR state after the fault, so that the fault first recovery end enters the WTR state;
  • a switching unit configured to: when the recovery terminal receives the information that the WTR time is exhausted by the recovery terminal, and the WTR time of the recovery terminal is exhausted after the failure, the recovery terminal enters the second NR state after the failure, The second NR state is no request, and the working channel state is selected.
  • the embodiment of the present invention further provides an automatic protection switching device, where the system includes: a failure first recovery end and a fault recovery end, wherein
  • the failure first recovery end is configured to receive the information that the recovery terminal sends to wait for the recovery of the WTR state after the failure, and the current state of the failure recovery first is the first NR state, and the state before the first NR state is the SF state. , enters the WTR state, and receives the WTR time exhausted information sent by the recovery terminal after receiving the fault, and enters the second NR state when the WTR time of the fault recovery end is exhausted, the first NR state is no request, Selecting a protection channel state, the second NR state is a no-request, a selected working channel state, and the SF state is a signal failure and a selected protection channel state;
  • the recovery after the fault is used to send the information of entering the WTR state to the first recovery end when the WTR state is entered, so that the failure first recovers the WTR state, and when the failure first receives the WTR time consumption sent by the recovery end After the failure, the WTR time of the recovery end is exhausted, and the recovery end enters the second NR state after the failure.
  • the switch back to the working channel satisfies the customer demand that the WTR time is returned to the working channel after the working channel is restored.
  • FIG. 1 is a flowchart of an implementation of an APS service channel switching method according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of an implementation of an APS service channel switching method according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart of an implementation example of an implementation method of an APS service channel switching method according to Embodiment 2 of the present invention.
  • FIG. 4 is a flowchart of implementing an APS service channel switching method according to Embodiment 3 of the present invention.
  • FIG. 5 is a structural diagram of an automatic protection switching device according to Embodiment 5 of the present invention.
  • FIG. 6 is a structural diagram of an automatic protection switching device according to Embodiment 6 of the present invention.
  • the application scenario of the embodiment of the present invention may be: for multi-protocol label switching (Multi-Protocol Label) Automatic protection switching (Switching, MPLS), Ethernet (Ethernet, ETH), etc. (Automatic Protection Switching (APS), when a fault occurs at both ends of the protection group, and the fault occurs at the two ends when the fault occurs, the fault recovery first usually waits for the fault. When the WTR time of the recovery end is exhausted, the switch is directly switched from the protection channel. To the working channel, therefore, the fault recovery terminal directly switches from the protection channel to the work without going through the WTR time. In order to make the recovery terminal switch from the protection channel to the working channel after the WTR time, the failure can be received at the recovery side first.
  • Multi-Protocol Label Automatic protection switching
  • MPLS Automatic protection switching
  • Ethernet Ethernet, ETH
  • APS Automatic Protection Switching
  • FIG. 1 is a flow chart showing an implementation of an APS service channel switching method according to Embodiment 1 of the present invention, which is described in detail as follows:
  • the information sent by the recovery terminal enters the state of waiting for the recovery of the WTR state, and the current state of the fault recovery first is the first NR state, and the state before the first NR state is the SF state.
  • the information of the locally entered WTR state may be the WTR switching request information of the remote end, where the priority of the WTR switching request information received by the local fault first recovery terminal is higher than the priority of the other local switching request information.
  • state transition between states of the APS may be performed according to a preset state machine.
  • the WTR time exhausted information sent by the recovery end after the fault recovery end receives the fault and the WTR time exhausted by the fault first recovery end are two conditions for the fault first recovery end to enter the second NR state, and the execution thereof is performed. There is no sequence, you can recover the WTR time exhausted information sent by the recovery end after receiving the fault, and then wait for the WTR time of the recovery end to be exhausted.
  • the fault first enters the second NR state; it can also be the fault first.
  • the WTR time of the recovery end is exhausted first, and then waits for the WTR time exhausted information sent by the recovery end after the failure recovery end receives the failure, and the recovery first enters the second NR state.
  • the WTR time of the first recovery end of the fault and the WTR time of the first recovery end of the fault may be pre-configured according to actual conditions, and the present invention is not limited thereto.
  • the mode of the APS is a 1+1 bidirectional recovery switching mode or a 1:1 bidirectional recovery switching mode.
  • FIG. 2 is a flowchart of an implementation of an APS service channel switching method according to Embodiment 2 of the present invention.
  • the application scenario of this embodiment may be the same as that in Embodiment 1, where the fault recovery first and the fault recovery end
  • the interactive mode describes the process of APS service channel switching:
  • the fault first recovers the information of the WTR state sent by the recovery end after receiving the fault, and the fault first recovers when the current state of the fault recovery first is the first NR state, and the state before the first NR state is the SF state.
  • two switching nodes in the network are taken as an example, where East (East) The side switching node is the fault recovery first, and the west (West) side switching node is the fault recovery end.
  • the APS mode of each node is 1+1 bidirectional recovery switching mode or 1:1 bidirectional recovery switching mode, from top to bottom.
  • the time axis, and the WTR time of the recovery front is 5 min, and the WTR time of the recovery end after the fault is 2 min, as follows:
  • the east end waits for the recovery time to be exhausted first.
  • the WTR time of the fault recovery first end is greater than the WTR time of the recovery end after the fault, and of course, the WTR time of the fault recovery first end may be smaller than the WTR time of the recovery end after the fault, which may be specifically performed according to actual conditions. It is not necessary to limit the invention here.
  • Table 1 shows the APS state transition of the Middle East and West segments of Embodiment 2 of the present invention:
  • the west end enters the second NR state, and the east end also enters the second state.
  • the NR state makes the west end return to the working channel after the WTR time, which satisfies the customer demand that the WTR time is returned to the working channel after the working channel is restored.
  • FIG. 4 is a flowchart showing an implementation of an APS service channel switching method provided by Embodiment 3 of the present invention, which is described in detail as follows:
  • the mode of the APS is a 1+1 bidirectional recovery switching mode or a 1:1 bidirectional recovery switching mode.
  • the recovery end when the recovery end receives the WTR time exhaustion information sent by the failure recovery end, and the WTR time of the recovery end is exhausted after the failure, the recovery end enters the second NR state after the failure, so that If the WTR time of the recovery end configuration is greater than the WTR time of the recovery end configuration, the WTR time of the recovery end is exhausted before the two ends are cut back to the working channel, which satisfies the WTR time after the working channel is restored. Channel requirements.
  • FIG. 5 is a structural diagram of an automatic protection switching device according to Embodiment 5 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, wherein the automatic protection switching device includes a WTR status unit 51 and Switching unit 52.
  • the resumed terminal sends information waiting to resume the WTR state, and the fault first recovers the current state of the recovery end as the first NR state, and the state before the first NR state is the SF state, the WTR state unit 51 causes the fault recovery first to enter the WTR state.
  • the WTR state unit 51 can perform state transition between the states of the APS according to a preset state machine.
  • the switching unit 52 causes the fault first recovery end to enter the second NR state, wherein the second NR The status is no request, and the working channel status is selected.
  • the WTR time exhausted information sent by the recovery end after the fault recovery end receives the fault and the WTR time exhausted by the fault first recovery end are two conditions for the fault first recovery end to enter the second NR state, and the execution thereof is performed.
  • the WTR time exhausted by the recovery end after receiving the fault is recovered first, and then the WTR time of the recovery end is exhausted, and the switching unit 52 causes the fault recovery first to enter the second NR state;
  • the WTR time of the first recovery end of the fault may be exhausted first, and then the information of the WTR time exhausted by the recovery end after the failure recovery end receives the failure is waited for, and the switching unit 52 causes the failure first recovery end to enter the second NR state.
  • the mode of the APS is a 1+1 bidirectional recovery switching mode or a 1:1 bidirectional recovery switching mode.
  • the WTR state is entered, and when the WTR times of both ends are exhausted, the fault first recovers into the second NR state, so that the user can clearly know the WTR state of the first recovery end. If the WTR time of the first recovery end is greater than the WTR time of the rear recovery end configuration, the WTR time of the recovery end is not exhausted until the WTR time is exhausted, and the WTR time is returned to the working channel, and the WTR time is recovered after the working channel is restored. Customer needs to the work channel.
  • FIG. 6 is a structural diagram of an automatic protection switching device according to Embodiment 6 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown, wherein the automatic protection switching device includes an information sending unit 61 and Switching unit 62.
  • the information transmitting unit 61 sends the information of entering the WTR state to the failure recovery first end, so that the failure first recovery end enters the WTR state.
  • the switching unit 62 causes the recovery terminal to enter the second NR state, the second NR.
  • the status is no request, and the working channel status is selected.
  • the mode of the APS is a 1+1 bidirectional recovery switching mode or a 1:1 bidirectional recovery switching mode.
  • the APS service channel switching system includes: a fault first recovery end and a fault recovery end.
  • the above-mentioned failure first receives the information of the waiting for recovery of the WTR state sent by the recovery terminal after receiving the failure, and the WTR is entered when the current state of the recovery first is the first NR state and the state before the first NR state is the SF state.
  • the fault first recovers to enter the second NR state, and the first NR state is no request,
  • the protection channel state is selected, and the second NR state is a no-request, a selected working channel state, and the SF state is a signal failure and a selected protection channel state.
  • the information of the WTR state is sent to the fault recovery first end, so that the fault recovery first enters the WTR state, and when the fault is received, the WTR time exhausted information sent by the recovery terminal is received.
  • the WTR time of the recovery end is exhausted after the fault, the fault first enters the second NR state.
  • the included units are only divided according to functional logic, but are not limited to the foregoing divisions, as long as the corresponding functions can be implemented; in addition, the specific names of the functional units are only for It is convenient to distinguish one from another and is not intended to limit the scope of protection of the present invention.
  • APS service channel switching method can be completed by using hardware related to the program instruction.
  • the program can be stored in a readable storage medium such as a random access memory, a magnetic disk, an optical disk, or the like.

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Abstract

本发明属于通信技术领域，提供一种APS业务通道切换方法、系统及自动保护倒换设备，所述方法包括：当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到所述第一NR状态之前的状态为SF状态时，则进入WTR状态；当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态。使得用户可以清楚的获知先恢复端的WTR状态，且在先恢复端配置的WTR时间大于后恢复端配置的WTR时间时，到故障先恢复端的WTR时间耗尽才回切到工作通道，满足工作通道恢复后经过WTR时间才回切到工作通道的客户需求。

Description

一种APS业务通道切换方法、系统及自动保护倒换设备 技术领域
本发明涉及通信技术领域，尤其涉及一种APS业务通道切换方法、系统及自动保护倒换设备。
背景技术
对于以太网（Ethernet，ETH）的自动保护倒换（Automatic Protection Switching，APS）G.8031，其定义了1＋1/1：1、单向/双向、恢复/非恢复倒换模式，并给出了各种应用场景及处理过程，按照G.8031定义，如果当前保护组处于1＋1双向恢复或1：1双向恢复保护模式下，当发现工作通道失效，有信号故障（Signal Fail， SF）告警时，将会触发保护倒换，将业务由工作通道切换到保护通道，经过一段时间后，若工作通道恢复， 则SF告警消失，为防止工作通道故障抖动引起回切， 自动保护倒换 （Automatic Protection Switching ，APS）将先进入等待恢复（Wait to Restore ，WTR）状态，WTR的持续时间由WTR定时器门限决定(一般由网络维护者自行定义)，在WTR时间内，如果工作通道一直再没有出现SF告警，APS将跳出WTR状态进入无请求状态（No Request，NR）（r/b=null），此时，业务重新回切到工作通道。
现有技术中，按照G.8031/G.8131协议，在1＋1/1：1双向恢复模式倒换处理过程中，当两端故障不同时恢复时，故障先恢复端响应故障后恢复端的SF(r/b=normal)状态进入NR(r/b=normal)状态；故障后恢复端接收到故障先恢复端进入NR（r/b=normal）的信息，进入WTR状态，等到WTR定时器耗尽时，进入到NR(r/b=null)状态；此时故障先恢复端响应故障后恢复端的NR（r/b=null）也进入NR（r/b=null）状态，两端回切到工作通道，即，当两端不同时恢复时，故障后恢复端进入WTR状态，WTR时间耗尽后，两端同时回切到工作通道。
按照现有技术所提供的技术方案，发现现有技术中存在如下技术问题：
现有技术的技术方案中，先恢复端没有进入进WTR状态，因此用户无法获知先恢复端的WTR状态就回切到工作通道，且若先恢复端配置的WTR时间大于后恢复端配置的WTR时间，则故障先恢复端可能出现WTR时间没有耗尽就回切到工作通道的情况，不满足工作通道恢复后经过WTR时间回切到工作通道的客户需求。
 技术问题
本发明的目的是提供一种APS业务通道切换方法，旨在解决现有技术的APS业务通道切换时，用户无法获知先恢复端的WTR状态就回切到工作通道，且若先恢复端配置的WTR时间大于后恢复端配置的WTR时间，则故障先恢复端可能出现WTR时间没有耗尽就回切到工作通道的情况，不满足工作通道恢复后经过WTR时间回切到工作通道的客户需求的问题。
 技术解决方案
本发明是这样实现的，本发明提供一种自动保护倒换APS业务通道切换方法，所述方法包括：
当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到所述第一NR状态之前的状态为SF状态时，则进入WTR状态，所述第一NR状态为无请求、选保护通道状态，SF状态为信号故障、选保护通道状态；
当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
本发明提供还提供一种自动保护倒换APS业务通道切换方法，所述方法包括：
当故障后恢复端进入WTR状态时，向故障先恢复端发送进入等待恢复WTR状态的信息，以使故障先恢复端进入WTR状态；
当故障后恢复端接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
本发明实施例还提供一种自动保护倒换APS业务通道切换方法，所述方法包括：
当故障后恢复端进入WTR状态时，向故障先恢复端发送进入等待恢复WTR状态的信息；
故障先恢复端接收故障后恢复端发送的进入WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则故障先恢复端进入WTR状态，所述第一NR状态为无请求、选保护通道状态NR（r/b=normal），SF状态为信号故障、选保护通道状态SF（r/b=normal）；
以两端WTR时间后耗尽的为准，将故障先恢复端和故障后恢复端分别从保护通道回切到工作通道。
本发明实施例还提供一种自动保护倒换设备，所述自动保护倒换设备包括：
WTR状态单元，用于当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到所述第一NR状态之前的状态为SF状态时，则进入WTR状态；
切换单元，用于当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
本发明实施例还提供一种自动保护倒换设备，所述自动保护倒换设备包括：
信息发送单元，用于当故障后恢复端进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态；
切换单元，用于当故障后恢复端接收到所述故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
本发明实施例还提供一种自动保护倒换设备，所述系统包括：故障先恢复端和故障后恢复端，其中，
所述故障先恢复端，用于接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则进入WTR状态，并当接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，进入第二NR状态，所述第一NR状态为无请求、选保护通道状态，所述第二NR状态为无请求、选工作通道状态，所述SF状态为信号故障、选保护通道状态；
所述故障后恢复端，用于当进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态，并当接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态。
 有益效果
本发明与现有技术相比，有益效果在于：故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端当前状态为第一NR状态NR（r/b=normal）、切换到第一NR状态之前的状态为SF（r/b=normal）时，则进入WTR状态，并且当两端的WTR时间都耗尽时，故障先恢复端进入第二NR状态NR（r/b=null），使得用户可以清楚的获知先恢复端的WTR状态，且在先恢复端配置的WTR时间大于后恢复端配置的WTR时间的情况下，等到故障先恢复端的WTR时间耗尽才回切到工作通道，满足了工作通道恢复后经过WTR时间才回切到工作通道的客户需求。
 附图说明
图1为本发明实施一提供的APS业务通道切换方法的实现的流程图；
图2为本发明实施二提供的APS业务通道切换方法的实现的流程图；
图3为本发明实施二提供的APS业务通道切换方法的实现示例的实现的流程图；
图4为本发明实施三提供的APS业务通道切换方法的实现的流程图；
图5为本发明实施例五提供的自动保护倒换设备的结构图；
图6为本发明实施例六提供的自动保护倒换设备的结构图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
以下结合具体实施例对本发明的实现进行详细描述：
实施例一
本发明实施例的应用场景可以为：对于多协议标签交换（Multi-Protocol Label Switching ，MPLS）、以太网 （Ethernet，ETH）等的自动保护倒换（Automatic Protection Switching，APS），当保护组中的两端发生信号故障后，且发生故障的两端不同时恢复故障时，故障先恢复端通常等故障后恢复端的WTR时间耗尽时，直接从保护通道切换到工作通道，因而，故障先恢复端没有经过WTR时间就直接从保护通道切换到工作，为了使故障后恢复端经过WTR时间后才从保护通道切换到工作通道，可以在故障先恢复端接收到故障后恢复端发送的进入等待恢复WTR状态的信息后，根据自身的情况，也相应的进入WTR状态，从而使得故障先恢复端也经过WTR时间后才回切到工作通道，其中，对于故障先恢复端和故障后恢复端的确认过程如下：在APS倒换组的两端发生信号故障后，当保护倒换组的一端检测到故障恢复，且接收到对端发送的报文信号为处于SF状态，则确定该端为故障为先恢复的端；当保护倒换组的一端检测到故障恢复，且接收到对端的报文信号为无请求、选保护通道状态，则确定该端为故障后恢复的端。图1示出了本发明实施一提供的APS业务通道切换方法的实现的流程图，详述如下：
S101，当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则进入WTR状态，所述第一NR状态为无请求、选保护通道状态NR（r/b=normal），SF状态为信号故障、选保护通道状态SF（r/b=normal）。
在本发明实施例中，本地进入WTR状态的信息可以是远端的WTR倒换请求信息，其中，本地故障先恢复端接收的WTR倒换请求信息的优先级高于本地其它的倒换请求信息的优先级。
在本发明实施例中，可以根据预设的状态机进行APS各个状态之间的状态转换。
S102，当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
在本发明实施例中，故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息和故障先恢复端的WTR时间耗尽为故障先恢复端进入第二NR状态的两个条件，其执行并无先后顺序，可以故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息，然后等待故障先恢复端的WTR时间耗尽，故障先恢复端进入第二NR状态；也可以是故障先恢复端的WTR时间先耗尽，然后等待故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息，故障先恢复端进入第二NR状态。
值得注意的是，可以根据实际的情况预配置故障先恢复端的WTR时间和故障先恢复端的WTR时间，在此不用以限制本发明。
需要指出的是，本发明实施例中APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
在本发明实施例中，故障先恢复端接收故障后恢复端发送的进入WTR状态的信息，且当前状态为NR（r/b=normal）、切换到第一NR状态之前的状态为SF（r/b=normal）时，则进入WTR状态，并且当两端的WTR时间都耗尽时，故障先恢复端进入第二NR状态，使得用户可以清楚的获知先恢复端的WTR状态，且在先恢复端配置的WTR时间大于后恢复端配置的WTR时间的情况下，等到故障先恢复端的WTR时间耗尽才回切到工作通道，满足了工作通道恢复后经过WTR时间才回切到工作通道的客户需求。
实施例二
图2示出了本发明实施二提供的APS业务通道切换方法的实现的流程图，本实施例的应用场景可以是与实施例一相同的应用场景，其中以故障先恢复端和故障后恢复端交互方式对APS业务通道切换的过程进行说明：
S201中，当故障后恢复端进入WTR状态时，向故障先恢复端发送进入WTR状态的信息。
S202，故障先恢复端接收故障后恢复端发送的进入WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则故障先恢复端进入WTR状态，所述第一NR状态为无请求、选保护通道状态NR（r/b=normal），SF状态为信号故障、选保护通道状态SF（r/b=normal）。
S203，以两端WTR时间后耗尽的为准，将故障先恢复端和故障后恢复端分别从保护通道回切到工作通道。
为了便于理解，以下以一个具体的实现示例对本发明实施例的方式进行解释，但不以此实现示例为限，请参阅图3，以网络中的两个倒换节点为例，其中，东（East）侧倒换节点为故障先恢复端，西（West）侧倒换节点为故障后恢复端，每一个节点的APS的模式为1＋1双向恢复倒换模式或者1：1双向恢复倒换模式，从上至下为时间轴，且设置故障先恢复端的WTR时间为5min，故障后恢复端的WTR时间为2min，详述如下：
T1时刻，两端工作故障，两端进入故障状态，即SF(r/b=normal)；
T2时刻，西端（WEST）工作通道故障恢复，进入第一NR状态NR(r/b=normal)，东端（EAST）保持SF状态SF(r/b=normal)；
T3时刻，东端（EAST）工作通道故障恢复，并收到西端的处于第一NR状态NR(r/b=normal)的信息，则东端进入WTR状态WTR（r/b=normal）；
T4时刻，西端当前状态为第一NR状态NR(r/b=normal)，当收到东端为WTR状态WTR（r/b=normal）的信息时，则当判断西端当前状态的为第一NR状态、并且切换到第一NR状态之前的状态为SF状态SF(r/b=normal)时，则西端进入WTR状态WTR（r/b=normal）；
此后一段时间，由于东端WTR时间为2min,西段WTR时间为5min，因此，东端等待恢复时间先耗尽，当东端的WTR时间耗尽时，且收到西端处于WTR状态WTR（r/b=normal）的信息时，进入第一NR状态NR（r/b=normal）；
T5时刻，西端的WTR时间耗尽，收到对端为第一NR状态NR（r/b=normal），则进入第二NR状态NR(r/b=null)，此时，东端当前第一NR状态NR（r/b=normal），收到西端进入第二NR状态NR(r/b=null)，东端也进入NR(r/b=null)状态，此时两端的均进入第二NR状态。
需要说明的是，本发明实施例中设置故障先恢复端的WTR时间大于故障后恢复端的WTR时间，当然，也可设置故障先恢复端的WTR时间小于故障后恢复端的WTR时间，具体可以根据实际情况进行设定，在此不用以限制本发明。
为了便于理解，表1示出了本发明实施例二中东端和西段的APS状态跳转的情况：
表1 东端和西段APS状态跳转情况
WEST EAST
SF(r/b= normal) SF(r/b= normal)
NR （ r/b=normal ） SF(r/b= normal)
NR （ r/b=normal ） WTR （ r/b=normal ）
WTR （ r/b=normal ） WTR （ r/b=normal ）
WTR （ r/b=normal ） NR （ r/b=normal ）
NR(r/b=null) NR （ r/b=normal ）
NR(r/b=null) NR(r/b=null)
本发明实施例中，西端接收东端发送的进入等待恢复WTR状态的信息，且当前状态为第一NR状态NR（r/b=normal），切换到第一NR状态之前的状态为SF（r/b=normal）时，则进入WTR状态，并且东端的WTR时间耗尽时，不进行通道切换，当西端的WTR时间耗尽时，西端进入第二NR状态，同时响应东端也进入第二NR状态，使得西端也经过WTR时间后才回切到工作通道，满足了工作通道恢复后都经过WTR时间才回切到工作通道的客户需求。
实施例三
图4示出了本发明实施三提供的APS业务通道切换方法的实现的流程图，详述如下：
S401中，当故障后恢复端进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态。
S402，当故障后恢复端接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态，第二NR状态为无请求、选工作通道状态。
在本发明实施例中，APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
本发明实施例中，当故障后恢复端接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，则故障后恢复端进入第二NR状态，使得先恢复端配置的WTR时间大于后恢复端配置的WTR时间的情况下，等到故障先恢复端的WTR时间耗尽两端才回切到工作通道，满足了工作通道恢复后经过WTR时间才回切到工作通道的需求。
实施例五
图5示出了本发明实施例五提供的自动保护倒换设备的结构图，为了便于说明，仅示出了与本发明实施例相关的部分，其中，上述自动保护倒换设备包括WTR状态单元51和切换单元52。
当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，WTR状态单元51使故障先恢复端进入WTR状态。
在本发明实施例中，WTR状态单元51可以根据预设的状态机进行APS各个状态之间的状态转换。
当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，切换单元52使故障先恢复端进入第二NR状态，其中，第二NR状态为无请求、选工作通道状态。
在本发明实施例中，故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息和故障先恢复端的WTR时间耗尽为故障先恢复端进入第二NR状态的两个条件，其执行并不先后顺序，可以故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息，然后等待故障先恢复端的WTR时间耗尽，切换单元52使故障先恢复端进入第二NR状态；也可以是故障先恢复端的WTR时间先耗尽，然后等待故障先恢复端接收故障后恢复端发送的WTR时间耗尽的信息，切换单元52使故障先恢复端进入第二NR状态。
需要指出的是，本发明实施例中APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
在本发明实施例中，故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且当前状态为第一NR状态NR（r/b=normal）、切换到第一NR状态之前的状态为SF（r/b=normal）时，则进入WTR状态，并且当两端的WTR时间都耗尽时，故障先恢复端进入第二NR状态，使得用户可以清楚的获知先恢复端的WTR状态，且在先恢复端配置的WTR时间大于后恢复端配置的WTR时间的情况下，等到故障先恢复端的WTR时间耗尽才回切到工作通道，满足了工作通道恢复后经过WTR时间才回切到工作通道的客户需求。
实施例六
图6示出了本发明实施例六提供的自动保护倒换设备的结构图，为了便于说明，仅示出了与本发明实施例相关的部分，其中，上述自动保护倒换设备包括信息发送单元61和切换单元62。
当故障后恢复端进入WTR状态时，信息发送单元61向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态。
当故障后恢复端接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，切换单元62使故障后恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
需要指出的是，本发明实施例中APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
实施例七
本发明实施例提供的了一种APS业务通道切换系统，上述APS业务通道切换系统包括：故障先恢复端和故障后恢复端。
上述故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则进入WTR状态，并当接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第一NR状态为无请求、选保护通道状态，所述第二NR状态为无请求、选工作通道状态，所述SF状态为信号故障、选保护通道状态。
上述故障后恢复端当进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态，并当接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态。
综上所述，本发明实施例的有意效果在于：
故障先恢复端接收故障后恢复端发送的进入WTR状态的信息，且当前状态为NR（r/b=normal）、切换到第一NR状态之前的状态为SF（r/b=normal）时，则进入WTR状态，并且当两端的WTR时间都耗尽时，故障先恢复端进入第二NR状态，使得用户可以清楚的获知先恢复端的WTR状态，且在先恢复端配置的WTR时间大于后恢复端配置的WTR时间的情况下，等到故障先恢复端的WTR时间耗尽才回切到工作通道，满足了工作通道恢复后经过WTR时间才回切到工作通道的客户需求。
上述系统和设备实施例中，所包括的各个单元只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；另外，各功能单元的具体名称也只是为了便于相互区分，并不用于限制本发明的保护范围。
本领域技术人员可以理解，本发明实施例提供的APS业务通道切换方法中，其全部或部分步骤是可以通过程序指令相关的硬件来完成。比如可以通过计算机运行程来完成。该程序可以存储在可读取存储介质，例如，随机存储器、磁盘、光盘等。

Claims (10)

  1. 一种自动保护倒换APS业务通道切换方法，其特征在于，所述方法包括：
    当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到所述第一NR状态之前的状态为SF状态时，则进入WTR状态，所述第一NR状态为无请求、选保护通道状态，SF状态为信号故障、选保护通道状态；
    当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
  2. 根据权利要求1所述的方法，其特征在于，所述APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
  3. 一种自动保护倒换APS业务通道切换方法，其特征在于，所述方法包括：
    当故障后恢复端进入WTR状态时，向故障先恢复端发送进入等待恢复WTR状态的信息，以使故障先恢复端进入WTR状态；
    当故障后恢复端接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
  4. 根据权利要求3所述的方法，其特征在于，所述APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
  5. 一种自动保护倒换APS业务通道切换方法，其特征在于，所述方法包括：
    当故障后恢复端进入WTR状态时，向故障先恢复端发送进入等待恢复WTR状态的信息；
    故障先恢复端接收故障后恢复端发送的进入WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则故障先恢复端进入WTR状态，所述第一NR状态为无请求、选保护通道状态NR（r/b=normal），SF状态为信号故障、选保护通道状态SF（r/b=normal）；
    以两端WTR时间后耗尽的为准，将故障先恢复端和故障后恢复端分别从保护通道回切到工作通道。
  6. 一种自动保护倒换设备，其特征在于，所述自动保护倒换设备包括：
    WTR状态单元，用于当故障先恢复端接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到所述第一NR状态之前的状态为SF状态时，则进入WTR状态；
    切换单元，用于当故障先恢复端接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，故障先恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
  7. 如权利要求6所述的自动保护倒换设备，其特征在于，所述APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
  8. 一种自动保护倒换设备，其特征在于，所述自动保护倒换设备包括：
    信息发送单元，用于当故障后恢复端进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态；
    切换单元，用于当故障后恢复端接收到所述故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态，所述第二NR状态为无请求、选工作通道状态。
  9. 如权利要求8所述的自动保护倒换设备，其特征在于，所述APS的模式为1＋1双向恢复倒换模式或1：1双向恢复倒换模式。
  10. 一种APS业务通道切换系统，其特征在于，所述系统包括：故障先恢复端和故障后恢复端，其中，
    所述故障先恢复端，用于接收故障后恢复端发送的进入等待恢复WTR状态的信息，且故障先恢复端的当前状态为第一NR状态、切换到第一NR状态之前的状态为SF状态时，则进入WTR状态，并当接收到故障后恢复端发送的WTR时间耗尽的信息，且故障先恢复端的WTR时间耗尽时，进入第二NR状态，所述第一NR状态为无请求、选保护通道状态，所述第二NR状态为无请求、选工作通道状态，所述SF状态为信号故障、选保护通道状态；
    所述故障后恢复端，用于当进入WTR状态时，向故障先恢复端发送进入WTR状态的信息，以使故障先恢复端进入WTR状态，并当接收到故障先恢复端发送的WTR时间耗尽的信息，且故障后恢复端的WTR时间耗尽时，故障后恢复端进入第二NR状态。
PCT/CN2011/079848 2011-09-20 2011-09-20 一种aps业务通道切换方法、系统及自动保护倒换设备 Ceased WO2012162982A1 (zh)

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