WO2012167490A1 - 一种通道组保护方法和系统、节点设备 - Google Patents
一种通道组保护方法和系统、节点设备 Download PDFInfo
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- WO2012167490A1 WO2012167490A1 PCT/CN2011/077755 CN2011077755W WO2012167490A1 WO 2012167490 A1 WO2012167490 A1 WO 2012167490A1 CN 2011077755 W CN2011077755 W CN 2011077755W WO 2012167490 A1 WO2012167490 A1 WO 2012167490A1
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- channel group
- protection
- working channel
- node device
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000013507 mapping Methods 0.000 claims abstract description 73
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 238000012795 verification Methods 0.000 claims description 62
- 238000012790 confirmation Methods 0.000 claims description 23
- 238000012546 transfer Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 15
- 238000010586 diagram Methods 0.000 description 32
- 230000000875 corresponding effect Effects 0.000 description 28
- 238000012423 maintenance Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 11
- 230000006870 function Effects 0.000 description 8
- 238000004891 communication Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- RGNPBRKPHBKNKX-UHFFFAOYSA-N hexaflumuron Chemical compound C1=C(Cl)C(OC(F)(F)C(F)F)=C(Cl)C=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F RGNPBRKPHBKNKX-UHFFFAOYSA-N 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
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Classifications
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-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
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
-
- 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
- H04J2203/0057—Operations, administration and maintenance [OAM]
- H04J2203/006—Fault tolerance and recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a channel group protection method, a node device, and a channel group protection system. Background technique
- Protection switching is a survivability technology.
- Survivability technology is a technology that improves the reliability performance of a network by providing the ability to recover services from service interruptions. This technology can be applied to all places where services are provided. For communication networks, providing protection switching is a necessary function.
- SDH Synchronous Digital Hierarchy, SDH sequence bad 1 J
- SONET Synchronous Optical Networking, Synchronous Optical Network
- the ability of the protection channel and the working channel to resist failure is generally the same, so the probability of failure of the protection channel and the working channel should be the same, if one protection channel is used to protect the protection of N working channels.
- the ⁇ : ⁇ protection mode existing in the prior art is an individual protection type, that is, a purlin protection channel protection raft working channel, which has some problems as described below:
- ⁇ protection When a large number of service signals are transmitted through the same working channel (working channel W as shown in Figure 1), individual protection is used (the protection channel shown in Figure 1 is used to protect the working channel W). The processing time is too long, and the time from the switching of the service channel W to the protection channel is timed out.
- FC Fiber Channel, Fibre Channel
- other services when the line capacity When the amount is very low, virtual concatenation is required in the SDH network.
- the inverse multiplexing technology is required to transmit the service. This requires high delay between transmission lines, and the service requires overall switching (such as As shown in Figure 2, the services on the working channels W1, W2, and W3 need to be switched. The current individual switching technology cannot support the overall switching requirements. Summary of the invention
- the technical problem to be solved by the embodiments of the present invention is to provide a channel group protection method, a node device, and a system, which can effectively ensure a highly correlated working channel, in view of the fact that the individual switching mode existing in the prior art cannot meet the requirements of service switching.
- a group fails, it can be switched to the qualified protection channel group at the same time. It can also improve the efficiency of channel group switching and save channel switching time.
- An embodiment of the present invention provides a channel group protection method, where the channel group is located between a first node device and a second node device, and the method includes:
- the first node device When the first node device detects that the working channel in the working channel group is faulty, it searches for the protection channel group for the working channel group according to the mapping relationship between the working channel group and the protection channel group;
- the second node device bridges the protection channel in the protection channel group found by the first node device with the working channel in the work channel group;
- the first node device transfers the entire service transmitted on all the working channels in the working channel group to the bridged protection channel for transmission.
- the embodiment of the invention provides a node device, including:
- a storage module configured to store a mapping relationship between the working channel group and the protection channel group between the node device and another node device;
- a search module configured to: find a protection for the working channel group according to a mapping relationship between the working channel group and the protection channel group maintained in the storage module when the working channel in the working channel group is faulty Channel group
- a sending module configured to send a switching request to the other node device by using the protection channel in the protection channel group that is found by the searching module, where the switching request carries the identifier of the working channel group, and the identifier of the working channel, One of the identification of the protection channel group and the identification of the protection channel;
- a service switching module configured to receive bridging confirmation information sent by the another node device after the protection channel in the protection channel group is bridged with the working channel in the working channel group, and respond to the bridge The confirmation information is switched to the bridged protection channel for transmission of all the services transmitted on all the working channels in the working channel group.
- the embodiment of the invention further provides a node device, including:
- a storage module configured to store a mapping relationship between the working channel group and the protection channel group between the node device and another node device;
- a receiving module configured to receive a switching request sent by the other node device through the protection channel, where the switching request carries the identifier of the working channel group, the identifier of the working channel, the identifier of the protection channel group, and the identifier of the protection channel One of them;
- a bridge module configured to verify a mapping relationship between the working channel and the protection channel, and after the verification is passed, bridge the protection channel in the protection channel group and the working channel of the working channel group, and A node device returns a bridge confirmation message.
- the embodiment of the present invention further provides a channel group protection system, including: a first node device and a second node device;
- the first node device and the second node device are configured to store a mapping relationship between the working channel group and the protection channel group between the first node device and the second node device;
- the first node device is further configured to: when detecting that the working channel in the working channel group is faulty, find a protection channel group for the working channel group according to a mapping relationship between the working channel group and the protection channel group; The protection channel in the identified protection channel group sends a switching request to the second node device; the second node device is further configured to verify the mapping relationship between the working channel and the protection channel after receiving the switching request; Passing the protection channel in the protection channel group and the working channel of the working channel group to bridge;
- the first node device is further configured to switch the entire service transmitted on all the working channels in the working channel group to the bridged protection channel for transmission.
- the channel group protection method, the node device, and the channel group protection system provided by the embodiments of the present invention, because the working channel and the protection channel are grouped, when the working channel group fails and requires overall switching, the corresponding corresponding channel can be quickly found.
- the protection channel performs service switching, which improves the efficiency of channel group switching and saves channel switching time, so that service transmission can quickly return to normal.
- FIG. 1 is a schematic diagram of a service on a single working channel in an individual protection mode in the prior art
- FIG. 2 is a schematic diagram of a service on a plurality of working channels in an individual protection mode in the prior art
- FIG. 3 is a schematic diagram of a configuration of a channel group protection system provided by the present invention
- FIG. 5 is a schematic diagram of a specific composition of a first node device according to the first embodiment of the present invention.
- FIG. 6 is a schematic diagram of an embodiment of a storage module in a first node device provided by the present invention.
- FIG. 7 is a schematic diagram of a configuration of a search module in a first node device provided by the present invention
- FIG. 8 is a schematic diagram of Embodiment 1 of a sending module sending a switching request of a first node device in the present invention
- FIG. 10 is a schematic diagram of Embodiment 3 of a sending module sending a switching request by a sending module of a first node device according to the present invention
- FIG. 11 is a schematic diagram of a composition of a service switching module of a first node device according to the present invention
- FIG. 12 is a schematic diagram of a second embodiment of a first node device according to the present invention
- Embodiment 13 is a schematic structural diagram of Embodiment 1 of a second node device provided by the present invention.
- FIG. 14 is a schematic diagram of a configuration of a storage module of a second node device according to the present invention
- FIG. 15 is a schematic diagram of a configuration of a bridge module of a second node device provided by the present invention
- FIG. 18 is a schematic flowchart of an embodiment of a method for searching for a protection channel group in a channel group protection method provided by the present invention
- FIG. 19 is a schematic flowchart of an embodiment of a method for performing a service switching method by a first node device in a channel group protection method provided by the present invention
- FIG. 20 is a schematic flowchart diagram of an embodiment of a method for performing channel bridging by a first node device in a channel group protection method according to the present invention.
- the technical problem to be solved by the present invention is to provide a channel group protection method and system, and a corresponding node device, which can effectively ensure that when a highly relevant working channel group fails, it can simultaneously switch to a qualified protection channel group. It can also improve the efficiency of channel group switching and save time for channel switching, so that service transmission can quickly return to normal.
- the working channel and the protection channel in the present invention refer to a channel for performing service transmission between two network nodes.
- the functions and functions of the node devices respectively located at the working channel or the protection channel are the same, but the functions and functions are different when they are used as the initiator and the receiver of the switching request.
- the node devices at the two ends implement the channel group protection technology provided by the present invention, the operations performed by the node devices are different, and the first node device and the second node device are respectively distinguished to show a more intuitive understanding of the embodiment of the present invention. .
- the first node device and the second node device in the embodiment of the present invention maintain the protection relationship between the working channel group and the protection channel group, and the protection channel group and the working channel group are determined, when the working channel in the working channel group appears When the service is switched and the service switching needs to be high, the service transmitted on the entire working channel group can be switched to the protection channel group.
- how the first node device and the second node device group the working channel and the protection channel and match the relationship between them; when the working channel fails, how to determine the working channel that needs to be located Whether the group needs to be switched overall; and how to find the corresponding protection channel group for the working channel group that needs to be switched overall; how does the first node device send the switching request after the protection channel group is found to make the second node device work channel and protection The channel is bridged; and how the first node device switches traffic to the protection channel for transmission.
- FIG. 3 is a schematic structural diagram of a channel group protection system according to the present invention.
- the system provided in this embodiment includes a first node device 1 and a second node device 2.
- the first node device 1 and the second node device 2 are configured to store the first node device 1 and the second node device a mapping relationship between the working channel group and the protection channel group between the standby devices 2;
- the first node device 1 is further configured to: when detecting that a working channel in the working channel group is faulty, find a protection channel group for the working channel group according to a mapping relationship between the working channel group and the protection channel group; The protection channel in the protection channel group sends a switching request to the second node device 2.
- the second node device 2 is further configured to: after receiving the switching request, verify the mapping relationship between the working channel and the protection channel; when the verification passes, the protection channel and the working channel group in the protection channel group The working channel is bridged.
- the first node device 1 is further configured to switch the services transmitted on all the working channels in the working channel group to the bridged protection channel for transmission.
- Both the first node device 1 and the second node device 2 need to group the working channel and the protection channel between them to form a working channel group and a protection channel group, and maintain and store the working channel group and the protection channel group and both.
- the protection resource table of the mapping relationship preferably, the first node device 1 and the second node device 2 also maintain a protection channel group status table indicating the usage status of each protection channel in the protection channel group, and the following describes how to work. Channels and protection channels are grouped.
- FIG. 4 is a schematic diagram of an embodiment of grouping a working channel and a protection channel in the present invention.
- the present invention adopts a protection channel group to protect the mode of the working channel group. First, the working channel and the protection channel are grouped. The principle of grouping can be determined or negotiated by the first node device 1 and the second node device 2, for example, the same bearer will be carried.
- the working channel of the service is divided into one working channel group, or the working channel through the same service layer path is divided into one working channel group.
- Wl, W2, and W3 are classified into WG1 group
- W4, W5, and W6 are classified into WG2 group
- W7, W8, and W9 are classified into WG3 group
- W10 and other working channels have no correlation, and can be themselves.
- each of the protection resource tables is locally maintained, and the protection resource table is responsible for recording the working channel and the protection channel group in the working channel group. Mapping between protection channels, first node device 1 and second node Point device 2 needs to maintain the same protection resource table.
- the protection resource table maintained on the first node device 1 and the second node device 2 is shown.
- PG1 is the protection channel group of WG1, and can also be used as the protection channel group of WG2; PG2 is the protection channel group of WG3, and W10 has little correlation with other working channels, so it can be a group separately.
- WG4 it is configured with a protection channel group PG3, which contains only one protection channel P7.
- the PG4 contains two protection channels P8 and P9, which are configured as protection channels for the WG5.
- the working channel can be set to its priority.
- W1 has a priority of 1
- W5 has a priority of 6.
- its priority can also be set to "missing. "", indicating that its priority can be random.
- W1 and W2 in WG1 can be independently switched, although they have been classified into WG1, they can be switched separately as a group to maximize compatibility with the individual switching mode in the prior art, and to meet some needs for individual switching. The need for a working channel.
- the first node device 1 and the second node device 2 also have a maintenance protection channel group status table.
- the protection channel group status table maintained on the first node device 1 and the second node device 2 of the present invention.
- the protection channel group status table is used to record the usage status of the protection channel.
- the first node device 1 and the second node device 2 located at both ends of the protection channel need to maintain the same protection channel group status table.
- the status of the channel group should be in a fault or disabled state, such as protection channel P8 in PG4 in Table 2, which is in a fault or disabled state. Therefore, the corresponding PG4 is in a fault or disabled state and cannot be used as a protection channel for WG5. However, there is no fault in the P9. When there is a working channel that requires individual switching, it can still be switched to the P9 for service transmission.
- PG1 is used as the protection channel group of WG1 and WG2 at the same time, when it is occupied by WG1, its idle state is identified as N, and the occupied state is identified as Y. If WG2 also has the overall switching requirement at this time, it can be based on Priority to protect the channel group preemption, combined with Table 1, we can see that WG3 The priority of the working channel is smaller than the priority of the working channel in WG2. Therefore, WG2 can preempt the PG2 in the idle state at this moment, and switch the service transmitted on the working channel of WG2 to the protection channel group PG2 originally belonging to WG3 for transmission. .
- FIG. 5 is a schematic diagram of a specific composition of a first node device according to Embodiment 1 of the present invention.
- the first node device 1 provided in this embodiment includes: a storage module 10, a search module 11, a sending module 12, and a service switching module 13.
- the storage module 10 is configured to store a mapping relationship between the working channel group and the protection channel group between the first node device 1 and another node device (ie, the second node device 2). Use status.
- the searching module 11 is configured to detect, according to the mapping relationship between the working channel group and the protection channel group maintained in the storage module 10, when the working channel in the working channel group is faulty, Find the protection channel group.
- the sending module 12 is configured to send, by using the protection channel in the protection channel group that is found by the searching module 11, a switching request to another node device, where the switching request carries the identifier of the working channel group, and the working channel One of the identification, the identification of the protection channel group, and the identification of the protection channel.
- the service switching module 13 is configured to receive the bridge confirmation information sent by the another node device after the protection channel in the protection channel group is bridged with the working channel in the working channel group, and respond to the bridge confirmation information.
- the services transmitted on all working channels in the channel group are switched over to the protection channel for transmission.
- the first node device 1 further includes:
- the grouping module 14 is configured to divide the working channel carrying the same service into one working channel group, or divide the working channel through the same service layer path into one working channel group, and configure at least one protection for each working channel group. Channel group.
- FIG. 6 is a schematic diagram of an embodiment of a storage module 10 in a first node device 1 according to the present invention. Intention.
- the storage module 10 includes: a protection resource maintenance unit 100 and a state maintenance unit 101.
- the protection resource maintenance unit 100 is configured to store a mapping relationship between the working channel group and the protection channel group.
- the mapping relationship between the working channel and the protection channel stored in the protection resource maintenance unit 100 of the storage module 10 is as shown in Table 1.
- the usage status of the protection channel in the protection channel group stored in the state maintenance unit 101 is as shown in Table 2.
- the status of the occupied and disabled states is not mentioned here.
- the search module 11 searches for a suitable protection channel group for the working channel group according to the protection channel group status table maintained in the status maintenance unit 101. However, before finding the protection channel group, it is also necessary to determine whether the working channel group needs to be switched overall. The following describes how to determine whether the working channel group needs to be switched overall and find the implementation process of the protection channel.
- FIG. 7 is a schematic structural diagram of Embodiment 2 of a first node device according to the present invention.
- the first node device 1 provided in this embodiment includes, in addition to the modules in the first embodiment, the following:
- the fault detection module 15 is configured to detect, when the working channel in the working channel group is a working channel carrying the same service, whether any working channel in the working channel group is faulty; When any working channel in the working channel group fails, it is confirmed that the working channel group needs to be switched overall; or when the working channel in the working channel group is a working channel that passes the same service layer path, the work is detected. Whether the number of failed working channels in the channel group exceeds a predetermined value; specifically, when the number of working channels in the working channel group exceeds a predetermined value, it is confirmed that the working channel group needs to be integrally switched.
- a working channel in the working channel group detects that there is a fault at its local or remote end, or if there is a switching request command at the local or remote end, the working channel is considered to be a fault working channel.
- the searching module 11 of the first node device 1 searches for the idle state in the state storage unit 101 according to the mapping relationship between the protection channel group and the working channel group stored in the protection resource maintenance unit 100.
- Protection channel group when there is no idle protection channel group, select the protection channel group of the working channel group with lower priority than the working channel group that needs to be switched overall as needed The protection channel group of the working channel group that is switched overall.
- a switching request is then sent to the second node device 2 through the protection channel in the protection channel group.
- PG1 is used as the protection channel group of WG1 and WG2 at the same time. Therefore, when it is occupied by WG1, its idle state is identified as N, and the occupied state is identified as Y.
- the protection channel group can be preempted according to the priority.
- the priority of the working channel in WG3 is smaller than the priority of the working channel in WG2. Therefore, WG2 can preempt the PG2 in the idle state at this moment.
- PG2 acts as a protection channel for WG2 to further transfer the traffic transmitted on the working channel of WG2 to the protection channel group PG2 belonging to WG3 for transmission.
- the first node device 1 determines the selected protection channel group, it carries the identification of the working channel group that needs to be switched overall, and the identification of the working channel, the identification of the protection channel group, and the identification of the protection channel in the switching.
- the request is sent to the second node device 2.
- the APS Auto Protection Switching
- the sending module 12 in FIG. 5 can send the switching request to the second node device 2 in the following three manners. Accordingly, the second node device 2 also has three ways to verify the between the working channel and the protection channel. The relationship is as follows:
- the first node device 1 sends an APS message on each protection channel of the protection channel group, and the APS message sent on the single protection channel carries the identifier of the working channel group, and sends the APS message.
- the mapping relationship between the channel groups is to find the identifiers of the working channel group and the working channel corresponding to the protection channel that receives the APS message, and the identifier of the working channel group that is found by the school insurance and the identifier of the identified working channel group. Whether the same is the same, and the identifier of the working channel that is found is the same as the identifier of the identified working channel. If the two verification results are the same, the verification is passed.
- FIG. 8 is a schematic diagram of Embodiment 1 of the sending module 12 of the first node device 1 in the present invention.
- the transmitting module of the first node device 1 Insert the ID of the faulty WG ( WG1 ) and the ID of each working channel in the WG1 (Wl or W2) into the reserved bytes of the APS message, and then send the APS message on each protection channel in PG1, optionally,
- the APS message carries the same fault request type.
- the second node device 2 After receiving the corresponding APS information on each protection channel of the protection channel group, the second node device 2 identifies the ID of the WG (WG1) and the ID of the working channel (Wl and W2) from the APS message, and then according to the table stored locally.
- the mapping relationship between the working channel group and the protection channel group in 1 searches for the IDs of the WGs and WGs corresponding to the protection channels P1 and P2 that receive the APS message, and verifies the ID of the WG found and the identified Whether the ID of the WG (WG1) is the same, and verifying whether the ID of the found working channel is the same as the ID (Wl and W2) of the identified working channel, if both of the above verification results are The same, the verification passed.
- the APS message is extended as follows:
- Mode 2 The first node device 1 sequentially selects a protection channel from the protection channel group to send an APS message, where the APS message carries the identifier of the working channel group and the identifier of all protection channels in the protection channel group. ;
- the second node device 2 receives the APS message on the protection channel selected by the first node device 1, and identifies the identifier of the working channel group carried in the APS message and the identifier of all the protection channels, according to the working channel group and the protection channel group.
- FIG. 9 is a schematic diagram of Embodiment 2 of the sending module 12 sending a switching request according to the present invention.
- the transmitting module of the first node device 1 selects a protection channel P1 in PG1, and inserts the ID of the WG (WG1) and all the PG1 in the APS message. Protect the channel ID (P1 and P2).
- the second node device 2 receives the APS message on the protection channel P2 selected by the first node device 1, and identifies the ID of the WG (WG1) carried in the APS message and the IDs (P1 and P2) of all protection channels, according to the local
- the stored mapping relationship between the working channel group and the protection channel group in Table 1 is used to find the ID of the WG corresponding to the PG1 where the protection channel P1 selected by the first node device 1 is located, and all the protection channels included in the found PG1.
- the APS message is extended as follows:
- Manner 3 In the mapping relationship between the protection channel and the working channel, the number of the protection channel and the working channel are equal and the corresponding relationship is fixed, and the correspondence between the protection channel group and the working channel group is fixed; Selecting a protection channel in the protection channel group to send an APS message, where the APS message carries the identifier of the working channel group and the identifier of the protection channel group;
- the second node device 2 receives the APS message on the protection channel selected by the first node device 1, and identifies the working channel group identifier and the protection channel group identifier carried in the APS message, according to the working channel group and the protection channel group. Mapping relationship, finding the protection of the protection channel selected by the first node device The identifier of the channel group and the identifier of the working channel group corresponding to the found protection channel group, and verifying whether the identifier of the found working channel group is the same as the identifier of the identified working channel group, and if The above two verification results are the same, and the verification is passed.
- FIG. 10 shows a third embodiment of the sending module 12 for transmitting a switching request.
- the sending module of the first node device 1 is at PG1.
- Select a protection channel and insert the ID of the WG ( WG1 ) and the ID of the PG ( PG1 ) in the APS message.
- the second node device 2 After receiving the APS message, the second node device 2 identifies the ID of the WG (WG1) carried in the APS message and the ID (WG2) of the protection channel group.
- the mapping relationship between the working channel in WG1 and the protection channel in PG1 is fixed.
- the second node device 2 searches for the ID of the PG in which the protection channel P1 selected by the first node device 1 is located according to the mapping relationship between the working channel group and the protection channel group in the table 1 stored locally, and the found
- the ID of the WG corresponding to the PG checks whether the found ID is the same as the ID (PG1) of the identified PG. If the two verification results are the same, the verification passes.
- the APS message is extended as follows:
- the second node device 2 After verifying the mapping relationship between the working channel and the protection channel, the second node device 2 determines whether to bridge each working channel in the working channel group and each protection channel in the protection channel group, and the bridge is completed. A node device 1 returns a corresponding bridge acknowledgement message, and if the bridge is not completed, a new switch request is returned to the first node device 1. How to implement service switching when the first node device 1 receives the bridge acknowledgement message or the new switch request returned by the second node device 2 will be described in detail below.
- FIG. 11 is a schematic structural diagram of an embodiment of a service switching module 13 according to the present invention.
- the service switching module 13 provided in this embodiment includes: a receiving unit 130, a service switching unit 131, and a receiving unit 130, configured to receive, from the second node device 2, a protection channel in the protection channel group and a working channel in the working channel group. A bridge confirmation message returned after bridging.
- the service switching unit 131 is configured to: after receiving the bridge confirmation message returned by the second node device 2, the receiving unit 130 switches the service transmitted on the working channel to the protection channel in the found protection channel group for transmission. Optionally, after the service switching is completed, the first node device 1 sends a message that the local node has completed the service switching to the second node device 2.
- a new switching request is sent to the first node device 1, and the first node device 1 also needs to process the new switching request.
- FIG. 12 is a schematic structural diagram of Embodiment 2 of the first node device 1 according to the present invention.
- the first node device 1 provided in the second embodiment includes, in addition to the foregoing storage module 10, the search module 11, the sending module 12, the service switching module 13, the grouping module 14, and the fault detecting module 15,
- the method includes: a receiving module 16, and a bridging module 17.
- the receiving module 16 is configured to receive a switching request from the second node device 2, where the switching request carries the indication information that the working channel and the protection channel are not bridged, and the working channel and the protection channel group in the new working channel group The mapping relationship between the protection channels.
- the bridging module 17 is configured to verify the mapping relationship between the working channel and the protection channel after receiving the switching request from the second node device 2; when the verification is yes, the working channel and protection of the working channel group The protection channels in the channel group are bridged.
- the specific operation of the bridging module 15 is the same as the operation of the second node device 2 receiving the switching request, so the specific details of the second node device 2 will be described in detail below. Function and structure.
- FIG. 13 is a schematic structural diagram of Embodiment 1 of a second node device 2 according to the present invention.
- the second node device 2 in this embodiment includes: a storage module 20, a receiving module 21, and a bridge module 22.
- the storage module 20 is configured to store a mapping relationship between the working channel group and the protection channel group between the first node device 1 and the second node device 2; optionally, the storage module 20 further stores the protection The usage status of each protection channel in the channel group.
- the receiving module 21 is configured to receive a switching request sent by the first node device 1 through the protection channel, where the switching request carries the identifier of the working channel group, the identifier of the working channel, the identifier of the protection channel group, and the protection channel.
- the switching request carries the identifier of the working channel group, the identifier of the working channel, the identifier of the protection channel group, and the protection channel.
- the logos One of the logos.
- the first node device 1 sends the switching request in three manners by using the foregoing APS message. Accordingly, the receiving module 21 of the second node device 2 receives the switching request in two ways, as follows:
- the APS message is received on the protection channel selected by the first node device 1 in sequence.
- the second node device 2 further includes a bridge module 22, configured to verify the mapping relationship between the working channel and the protection channel after the receiving module 21 receives the switching request from the first node device 1, and after the verification is passed, The protection channel in the protection channel group and the working channel of the working channel group are bridged, and the bridge confirmation information is returned to the first node device.
- a bridge module 22 configured to verify the mapping relationship between the working channel and the protection channel after the receiving module 21 receives the switching request from the first node device 1, and after the verification is passed, The protection channel in the protection channel group and the working channel of the working channel group are bridged, and the bridge confirmation information is returned to the first node device.
- the second node device 2 further includes:
- the grouping module 23 is configured to divide the working channel carrying the same service into one working channel group, or divide the working channel through the same service layer path into one working channel group, and configure at least one protection for each working channel group. Channel group.
- the sending module 24 is configured to check, by the bridge module 22, the mapping relationship between the working channel and the protection channel, and when the verification fails, to the second node device 2 by using the protection channel in the protection channel group Sending a switching request, the switching request carries the indication information that the working channel and the protection channel are not bridged, and the mapping relationship between the working channel in the new working channel group and the protection channel in the protection channel group.
- FIG. 14 is a schematic structural diagram of an embodiment of a storage module 20 of a second node device 2 according to the present invention.
- the storage module 20 of the second node device 2 is the same as the storage module 10 in the first node device 1, and further includes: a protection resource maintenance unit 200 and a state maintenance unit 201.
- the protection resource maintenance unit 200 is configured to store a mapping relationship between the working channel group and the protection channel group.
- the state maintenance unit 201 is configured to store a usage state of the protection channel in the protection channel group.
- the specific functions and functions of the storage module 20 of the second node device 2 are the same as those of the storage module 10 in the first node device 1, and details are not described herein again.
- FIG. 15 is a schematic structural diagram of an embodiment of a bridge module 22 of a second node device 2 according to the present invention.
- the bridging module 22 provided in this embodiment specifically includes: a verifying unit 220 and a bridging unit 221 .
- the verification unit 220 is configured to verify, after the receiving module 21 receives the switching request, the mapping relationship between the working channel and the protection channel according to the switching request received by the receiving module.
- the bridging unit 221 is configured to bridge the working channel of the working channel group and the protection channel in the protection channel group when the verification unit 220 passes the verification, and return a bridge confirmation message to the first node device 1.
- the verification unit 220 can verify the mapping relationship between the working channel and the protection channel in three ways, as follows:
- the working channel and the protection channel between the second node device and the first node device are grouped according to the embodiment of the present invention.
- the working channel group fails and requires overall switching, the corresponding protection channel can be quickly found.
- Service switching can improve the efficiency of channel group switching and save time for channel switching, so that service transmission can be quickly restored to normal.
- the channel group protection technology provided by the present invention is not limited to specific network technologies and protection technologies, and is applicable to SDH (Synchronous Digital Hierarchy), OTN (Optical Transmission Network), MPLS-TP (Multi- Protocol Label Switch_Transport Profile, Multi-Protocol Label Switching - Transport Domain), ETN (ETHERNET, Ethernet) and other transport technologies.
- FIG. 16 is a schematic flowchart diagram of Embodiment 1 of a channel group protection method according to the present invention.
- the channel group in this embodiment is located between the first node device and the second node device, and the method includes:
- Step 100 When the first node device detects that the working channel in the working channel group is faulty, the first node device searches for the protection channel group according to the mapping relationship between the working channel group and the protection channel group.
- Step 101 The second node device bridges the protection channel in the protection channel group found by the first node device with the working channel in the working channel group.
- Step 102 The entire service transmitted on all the working channels in the working channel group is switched to the bridged protection channel for transmission.
- the method provided in this embodiment can be implemented in the channel group protection system shown in FIG.
- the above working channel and protection channel refer to the channel for service transmission between two network nodes.
- the following describes in detail that the first node device 1 and the second node device 2 respectively group the working channel and the protection channel, and preset the working channel group and the protection channel group between the first node device 1 and the second node device 2; The process of mapping relationships.
- FIG. 17 is a working channel and a protection channel in a channel group protection method according to the present invention.
- Step 201 Configure at least one protection channel group for each working channel group; wherein, the number of protection channels in the protection channel group is greater than or equal to the number of working channels in the protected working channel group.
- the working channel and the protection channel are grouped as shown in FIG. 4, and after the grouping is completed, the protection resource table and the protection channel group status table are simultaneously maintained on the first node device 1 and the second node device 2, as specifically as Table 1 and Table 2 are shown; the method embodiment may be implemented by the first node device 1 as shown in FIG. 5 to FIG. 6 , and details are not described herein again.
- the following describes how the first node device 1 judges that the working channel group needs to be switched overall due to the failure of the working channel, and finds the protection channel for the working channel group that needs to be switched.
- the working channel group in the working channel group is 7
- the working channel in the working channel group is the working channel group passing the same service layer path, when the number of working channels in the working channel group exceeds a predetermined value, it is confirmed that the working channel group needs to be switched overall.
- a working channel in the working channel group detects that there is a fault at its local or remote end, or if there is a switching request command at the local or remote end, the working channel is considered to be a fault working channel.
- W-SFG Wl-TSF or W2-TSF or W3-TSF
- P-SFG Pl-TSF or P2-TSF or P3-TSF.
- SFG indicates a signal path group failure (Signal Fail Group); TSF indicates a path signal failure (Trail Signal Fail);
- the above expression means that when any one of the working channels such as W1 or W2 or W3 fails (denoted as: Wl-TSF or W2-TSF orW3-TSF), the entire working channel group signal is invalidated (denoted as: W-SFG), requires overall switching. Similarly, when P1 or P2 or P3, etc. If a path signal fails (denoted as: Pl-TSF or P2-TSF or P3-TSF), the entire protection channel group path signal is invalidated (denoted as: P-SFG), and overall switching is required.
- W-SFG X% of the Wi-TSF
- X% of the Wi-TSF is the percentage of the working channel in which the TSF indication appears to occupy the total number of working channels in the entire working channel group. If the value of X% reaches a predetermined value, for example, 60%, the working channel is judged. The group path signal is invalid (denoted as W-SFG). Similarly, X% of the Pi-TSF refers to the percentage of the protection channel that appears in the TSF indication to the total number of protection channels in the entire protection channel group. If the value of X% is reached. The predetermined value determines that the protection channel group path signal is invalid (denoted as P-SFG).
- TDF path signal failure
- protection channel protection channel
- TSD Traffic Signal Degrade
- FIG. 18 is a schematic flowchart diagram of an embodiment of a method for searching for a protection channel group in a channel group protection method according to the present invention.
- the method provided in this embodiment includes:
- Step 300 Find an idle protection channel group in at least one protection channel group that is mapped to the working channel group.
- Step 301 When there is no idle protection channel group, select a protection channel group of the working channel group having a lower priority than the working channel group that needs to be integrally switched as a protection channel group of the working channel group that needs to be integrally switched.
- the protection channel group of the lowest priority working channel group can be selected as the protection channel group of the working channel group that needs to be switched overall, and other work than the overall switching needs can be selected.
- the protection channel group of the working channel group with the lower priority of the channel group serves as the protection channel group of the working channel group that needs to be switched overall.
- WG2 If WG2 also has the overall switching demand at this time, The protection channel group preemption according to the priority, the priority of the working channel in WG3 is smaller than the priority of the working channel in WG2. Therefore, WG2 can preempt the PG2 in the idle state at present, and use PG2 as the protection channel of WG2, so as to further WG2 The traffic transmitted on the working channel is switched to the protection channel group PG2 belonging to WG3 for transmission.
- the first node device 1 at one end of the working channel group that needs to be integrally switched sends a switching request to the second node device 2 at the other end through the identified protection channel in the protection channel group; the switching request Carrying the identifier of the working channel group, or further carrying the target of the working channel or the label of the protection channel group or the label f of the protection channel.
- the APS Automatic Protection Switching
- the existing standard is extended to complete the switching request delivery.
- the first node device 1 sends an APS message and the second node device 2 verifies the mapping relationship between the working channel and the protection channel according to the APS, and specifically includes the following three methods:
- the first node device 1 sends an APS message on each protection channel of the protection channel group, where the APS message carries the identifier of the working channel group and the identifier of the working channel corresponding to the protection channel that sends the APS message.
- the second node device 2 receives the APS message on each protection channel, and identifies the identifier of the working channel group and the identifier of the working channel carried in the APS message, according to the mapping relationship between the working channel group and the protection channel group. Querying the identifiers of the working channel group and the working channel corresponding to the protection channel that receives the APS message, and verifying whether the identifier of the working channel group that is found is the same as the identifier of the identified working channel group, and verifying the search The identifier of the working channel that is obtained is the same as the identifier of the identified working channel. If the two verification results are the same, the verification is passed.
- the second node device 2 bridges the working channel of the working channel group and the protection channel in the protection channel group, and returns a bridge confirmation message to the first node device 1, the first node After receiving the bridge confirmation message returned by the second node device 2, the device 1 switches the entire service transmitted on the working channel to the protection channel in the found protection channel group for transmission;
- the second node device 2 passes the protection channel in the protection channel group to the The first node device 1 sends a switching request, where the switching request carries the indication information that the working channel and the protection channel are not bridged, and the mapping relationship between the working channel in the new working channel group and the protection channel in the protection channel group. .
- Mode 2 The first node device 1 selects a protection channel from the protection channel group to send an APS message, where the APS message carries the identifier of the working channel group and the identifiers of all protection channels in the protection channel group.
- the second node device 2 receives the APS message on the protection channel selected by the first node device 1, and identifies the identifier of the working channel group carried in the APS message and the identifier of all the protection channels, according to the working channel group and the protection channel group.
- the mapping between the working channel group corresponding to the protection channel group in which the protection channel selected by the first node device 1 is located, and the identifiers of all the protection channels included in the found protection channel group are verified. Whether the identifier of the working channel group is the same as the identifier of the identified working channel group, and verifying whether the identifiers of all the protected channels that are found are the same as the identifiers of all the identified protection channels, if the above Both verification results are the same and the verification is passed.
- the second node device 2 bridges the working channel of the working channel group and the protection channel in the protection channel group, and returns a bridge confirmation message to the first node device 1, the first node After receiving the bridge confirmation message returned by the second node device 2, the device 1 switches the entire service transmitted on the working channel to the protection channel in the found protection channel group for transmission;
- the second node device 2 sends a switching request to the first node device 1 through the protection channel in the protection channel group, where the switching request carries an indication that the working channel and the protection channel are not bridged. Information and the mapping between the working channels in the new working channel group and the protection channels in the protection channel group.
- Manner 3 In the mapping relationship between the protection channel and the working channel, the number of the protection channel and the working channel are equal and the corresponding relationship is fixed, and the correspondence between the protection channel group and the working channel group is fixed; Selecting a protection channel in the protection channel group to send an APS message, where the APS message carries the identifier of the working channel group and the identifier of the protection channel group;
- the second node device 2 receives the APS message on the protection channel selected by the first node device 1, and identifies the working channel group identifier and the protection channel group identifier carried in the APS message, according to the working channel.
- the mapping between the group and the protection channel group, the identifier of the protection channel group where the protection channel selected by the first node device 1 is located, and the identifier of the working channel group corresponding to the found protection channel group are verified.
- the identification of the working channel group is the same as the identification of the identified working channel group, and is the same. If the two verification results are the same, the verification is passed.
- the second node device 2 bridges the working channel of the working channel group and the protection channel in the protection channel group, and returns a bridge confirmation message to the first node device 1, the first node After receiving the bridge confirmation message returned by the second node device 2, the device 1 switches the entire service transmitted on the working channel to the protection channel in the found protection channel group for transmission;
- the second node device 2 sends a switching request to the first node device 1 through the protection channel in the protection channel group, where the switching request carries an indication that the working channel and the protection channel are not bridged. Information and the mapping between the working channels in the new working channel group and the protection channels in the protection channel group.
- FIG. 19 is a schematic flowchart diagram of a flow of a method for performing a service switching method by a first node device 1 in a channel group protection method according to the present invention.
- the method provided in this embodiment includes:
- Step 400 The first node device 1 receives the bridge acknowledgement message returned by the second node device 2.
- Step 401 The first node device 1 performs overall transmission of the service transmitted on the working channel to the protection channel in the bridged protection channel group for transmission.
- the method further includes:
- Step 402 After completing the service switching, the first node device 1 sends a message that the local completed service switching is sent to the second node device 2.
- the second node device 2 does not complete the bridging of the protection channel and the working channel, and sends a new switching request to the first node device 1, the first node device 1 also needs to process the new switching request.
- FIG. 20 is a schematic flowchart diagram of an embodiment of a method for performing channel bridging by a first node device 1 in a channel group protection method according to the present invention.
- the method of this embodiment includes:
- Step 500 The first node device 1 receives the switching request returned by the second node device 2.
- Step 501 The first node device 1 checks the mapping relationship between the working channel and the protection channel.
- the first node device 1 checks the mapping relationship between the working channel and the protection channel, and the second node device 2 - I will not repeat them here.
- Step 502 When the check is yes, the first node device 1 bridges the working channel of the working channel group and the protection channel in the protection channel group, and returns a bridge confirmation message to the second node device 2.
- Embodiments The channel group protection method provided by the present invention, because the working channel and the protection channel between the second node device 2 and the first node device 1 are grouped, can be fast when the working channel group fails and requires overall switching
- the service can be switched to the corresponding protection channel to improve the efficiency of channel group switching and save channel switching time, so that service transmission can be quickly restored to normal.
- SDH Serial Digital Hierarchy
- tic Optic Transmission Network
- MPLS-TP Multi-Protocol Label Switch. Transport Profile
- ETN ETHERNET
- Ethernet technology Ethernet technology and other fields of transmission technology.
- the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
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Abstract
本发明公开了一种通道组保护方法、节点设备和系统,所述方法包括:第一节点设备侦测到工作通道组中的工作通道出现故障时,根据工作通道组与保护通道组之间的映射关系,为所述工作通道组查找保护通道组;第二节点设备将第一节点设备查找到的保护通道组中的保护通道和所述工作通道组中的工作通道进行桥接;并且第一节点设备将该工作通道组中的所有工作通道上传送的业务整体倒换到已桥接的保护通道进行传送。实施本发明提供的通道组保护技术、由于将第二节点设备与第一节点设备之间的工作通道和保护通道进行了分组,在工作通道组出现故障需要整体倒换的时候,可以快速的查找到与其对应的保护通道进行业务的倒换,提升了通道倒换的效率,有利于业务的正常传送。
Description
一种通道组保护方法和系统、 节点设备 技术领域
本发明涉及通信技术领域, 尤其涉及一种通道组保护方法、 节点设备以及 通道组保护系统。 背景技术
保护倒换是一种可生存性技术, 可生存性技术是通过提供从服务中断中恢 复服务的能力来提高网络的可靠性性能的技术。 这种技术可以应用于所有提供 服务的场所, 对于通讯网络来说, 提供保护倒换更是一个必要的功能。
保护倒换在通讯网络中有着广泛的应用。 例如 SDH ( Synchronous Digital Hierarchy, 同步数字序歹1 J )或 SONET ( Synchronous Optical Networking , 同步光 网络) 中提供了 1+1 保护, 1:Ν 保护, 两纤环 /四纤环复用段保护, SNCP ( Sub-network Connection Protection, 子网连接保护)保护和 DNI ( Dual-node interconnection , 双节点互连)保护, 以及 ΟΤΝ ( Optical transport network, 光传 送网) 的保护等。
在通信网络中, 保护通道和工作通道的抗失效的能力一般情况下是相同的, 因此保护通道和工作通道失效的概率也应该是相同的, 如果采用 1 条保护通道 保护 N条工作通道的保护模式(称为: 1:N保护模式), 当 N比较大的情况下, 多条工作通道争用一条保护通道的概率还是^艮大的。 此时, 网络中将不能提供 对于某些工作通道的保护, 因此, 在通信网络中推行 Μ:Ν保护模式是十分必要 的 ( 1<=Μ<=Ν )。
现有技术中存在的 Μ:Ν保护模式, 均为个体保护类型,也即 Μ条保护通道 保护 Ν条工作通道, 其存在如下描述的一些问题:
第一, 对于 Μ:Ν保护: 当大量业务信号通过相同工作通道(如图 1所示的 工作通道 W )传送时, 采用个体保护 (图 1中所示的保护通道 Ρ用于保护工作 通道 W )会导致处理时间过长, 业务从工作通道 W倒换到保护通道 Ρ的时间超 时。
第二, 对于以太网业务, FC ( Fiber Channel, 光纤通道)等业务, 当线路容
量很低时, 在 SDH网络中要求采用虚级联, 在 OTN网络中则要求采用反向复 用技术来传送业务, 这对传输线路之间延迟的要求很高, 且业务要求整体倒换 (如图 2所示的, 工作通道 Wl、 W2、 W3上的业务都需要倒换)。 目前的个体 倒换技术还无法支持整体倒换的要求。 发明内容
本发明实施例所要解决的技术问题是针对现有技术中存在的个体倒换模式 无法满足业务倒换的需求, 提供一种通道组保护方法、 节点设备及系统, 可以 有效保证相关性很强的工作通道组发生故障时, 能够同时倒换到符合条件的保 护通道组上, 还能够提升通道组倒换的效率, 节约通道倒换的时间。
本发明实施例提供一种通道组保护方法, 所述通道组位于第一节点设备和 第二节点设备之间, 该方法包括:
第一节点设备侦测到工作通道组中的工作通道出现故障时, 根据工作通道 组与保护通道组之间的映射关系, 为所述工作通道组查找保护通道组;
第二节点设备将第一节点设备查找到的保护通道组中的保护通道和所述工 作通道组中的工作通道进行桥接; 并且
第一节点设备将该工作通道组中的所有工作通道上传送的业务整体倒换到 已桥接的保护通道进行传送。
本发明实施例提供了一种节点设备, 包括:
存储模块, 用于存储所述节点设备与另一节点设备之间的工作通道组与保 护通道组之间的映射关系;
查找模块, 用于侦测到所述工作通道组中的工作通道出现故障时, 根据所 述存储模块中维护的工作通道组与保护通道组之间的映射关系, 为所述工作通 道组查找保护通道组;
发送模块, 用于通过所述查找模块查找到的保护通道组中的保护通道向另 一节点设备发送倒换请求, 其中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通道组的标识、 保护通道的标识的其中一种;
业务倒换模块, 用于接收所述另一节点设备将保护通道组中的保护通道与 工作通道组中的工作通道进行桥接完成后发出的桥接确认信息, 并响应所述桥
接确认信息将该工作通道组中的所有工作通道上传送的业务整体倒换到已桥接 的保护通道进行传送。
本发明实施例还提供了一种节点设备, 包括:
存储模块, 用于存储所述节点设备与另一节点设备之间的工作通道组与保 护通道组之间的映射关系;
接收模块, 用于接收来自另一节点设备通过保护通道发送的倒换请求; 其 中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通道 组的标识、 保护通道的标识的其中一种;
桥接模块, 用于对工作通道和保护通道的映射关系进行校验, 校验通过后, 将所述保护通道组中的保护通道和所述工作通道组的工作通道进行桥接, 并向 所述另一节点设备返回桥接确认信息。
相应地, 本发明实施例还提供了一种通道组保护系统, 包括: 包括第一节 点设备和第二节点设备;
所述第一节点设备和第二节点设备用于存储所述第一节点设备与第二节点 设备之间的工作通道组与保护通道组之间的映射关系;
所述第一节点设备还用于侦测到工作通道组中的工作通道出现故障时, 根 据工作通道组与保护通道组之间的映射关系, 为所述工作通道组查找保护通道 组; 并通过查找到的保护通道组中的保护通道向第二节点设备发送倒换请求; 所述第二节点设备还用于在接收到倒换请求后, 对工作通道和保护通道的 映射关系进行校验; 在校验通过时, 将所述保护通道组中的保护通道和所述工 作通道组的工作通道进行桥接;
所述第一节点设备还用于将所述工作通道组中的所有工作通道上传送的业 务整体倒换到已桥接的保护通道进行传送。
本发明实施例提供的通道组保护方法、 节点设备和通道组保护系统, 由于 将工作通道和保护通道进行了分组, 在工作通道组出现故障需要整体倒换的时 候, 可以快速的查找到与其对应的保护通道进行业务的倒换, 提升了通道组倒 换的效率, 节约通道倒换的时间, 使得业务传送可以快速恢复正常。 附图说明
例或现有技术描述中所需要使用的附图作筒单地介绍, 显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1 是现有技术中的个体保护模式下单个工作通道上的业务需要倒换的示 意图;
图 2是现有技术中的个体保护模式下多个工作通道上的业务需要倒换的示 意图;
图 3是本发明提供的一种通道组保护系统的组成示意图; 图 5是本发明提供的第一节点设备实施例一的具体组成示意图;
图 6是本发明提供的第一节点设备中存储模块实施例的示意图;
图 7是本发明提供的第一节点设备中查找模块实施例的组成示意图; 图 8是本发明中第一节点设备的发送模块发送倒换请求实施例一的示意图; 图 9是本发明中第一节点设备的发送模块发送倒换请求实施例二的示意图; 图 10是本发明中第一节点设备的发送模块发送倒换请求实施例三的示意 图;
图 11是本发明提供的第一节点设备的业务倒换模块实施例的组成示意图; 图 12是本发明提供的第一节点设备实施例二的组成示意图;
图 13是本发明提供的第二节点设备实施例一的组成示意图;
图 14是本发明提供的第二节点设备的存储模块实施例的组成示意图; 图 15是本发明提供的第二节点设备的桥接模块实施例的组成示意图; 图 16是本发明提供的通道组保护方法实施例一的流程示意图 方法实施例的流程示意图;
图 18是本发明提供的通道组保护方法中查找保护通道组的方法实施例的流 程示意图;
图 19是本发明提供的通道组保护方法中第一节点设备进行业务倒换方法流 程实施例的流程示意图;
图 20是本发明提供的通道组保护方法中第一节点设备进行通道桥接方法实 施例的流程示意图。 具体实施方式
本发明所要解决的技术问题在于提供一种通道组保护方法和系统, 以及相 应的节点设备, 可以有效保证相关性很强的工作通道组发生故障时, 能够同时 倒换到符合条件的保护通道组上, 还可以能够提升通道组倒换的效率, 节约通 道倒换的时间, 使得业务传送可以快速恢复正常。
首先需要说明的是, 本发明中的工作通道和保护通道是指两个网络节点之 间进行业务传送的通道。 分别位于工作通道或保护通道两端的节点设备所具备 的功能和作用其实是相同的, 只是在作为倒换请求发起方和接收方的时候, 其 功能和作用有所不同, 本发明实施例中为了清楚说明两端的节点设备在实现本 发明提供的通道组保护技术时, 各自进行的操作有所不同, 分别用第一节点设 备和第二节点设备以示区分, 以便更为直观的理解本发明实施例。
本发明实施例中的第一节点设备和第二节点设备上都维护由工作通道组和 保护通道组, 保护通道组与工作通道组之间的保护关系确定, 当工作通道组中 的工作通道出现故障, 需要进行业务倒换并且该业务倒换对延时性要求很高的 时候, 可以将整个工作通道组上传送的业务倒换到保护通道组上进行。 本发明 实施例中, 将具体说明第一节点设备和第二节点设备如何对工作通道和保护通 道进行分组并匹配它们之间的关系; 在工作通道出现故障时, 如何判断需要将 其所在工作通道组是否需要整体倒换; 以及如何为需要整体倒换的工作通道组 查找相应的保护通道组; 在查找到保护通道组之后, 第一节点设备如何发送倒 换请求以使第二节点设备对工作通道与保护通道进行桥接; 以及第一节点设备 如何将业务倒换到保护通道上进行传送。
下面结合图 3~图 15 , 对本发明提供的通道组保护系统以及其中的第一节点 设备和第二节点设备的具体组成进行详细描述。
参见图 3 , 图 3为本发明提供的一种通道组保护系统的组成示意图。 本实施 例提供的系统包括第一节点设备 1和第二节点设备 2。
第一节点设备 1和第二节点设备 2用于存储第一节点设备 1与第二节点设
备 2之间的工作通道组与保护通道组之间的映射关系;
第一节点设备 1 还用于侦测工作通道组中的工作通道出现故障时, 根据工 作通道组与保护通道组之间的映射关系, 为所述工作通道组查找保护通道组; 并通过查找到的保护通道组中的保护通道向第二节点设备 2发送倒换请求。
第二节点设备 2还用于在接收到倒换请求后, 对工作通道和保护通道的映 射关系进行校验; 在校验通过时, 将所述保护通道组中的保护通道和所述工作 通道组的工作通道进行桥接。
第一节点设备 1 还用于将所述工作通道组中的所有工作通道上传送的业务 整体倒换到已桥接的保护通道进行传送。
第一节点设备 1和第二节点设备 2都需要对它们之间的工作通道和保护通 道分别进行分组, 形成工作通道组和保护通道组, 并且维护存储有工作通道组 和保护通道组以及两者之间的映射关系的保护资源表,优选地, 第一节点设备 1 和第二节点设备 2还会维护表示保护通道组中各个保护通道的使用状态的保护 通道组状态表, 下面说明如何对工作通道和保护通道进行分组。
参见图 4,图 4为本发明中对工作通道和保护通道进行分组实施例的示意图。 第一节点设备 1和第二节点设备 2之间有多条工作通道,分别为 Wl、 W2、 W3、 W4、 W5、 W6、 W7、 W8、 W9、 W10; 同时, 第一节点设备 1和第二节点设备 2之间还有多条保护通道 Pl、 P2、 P3、 P4、 P5、 P6、 P7。 本发明采用保护通道 组保护工作通道组的模式, 首先将工作通道和保护通道进行分组, 分组的原则 可以由第一节点设备 1和第二节点设备 2 自定义或协商决定, 例如将承载同一 个业务的工作通道分为一个工作通道组, 或者将通过相同服务层路径的工作通 道分为一个工作通道组。 具体如图 4所示, 将 Wl、 W2、 W3 归为 WG1组, W4、 W5、 W6归为 WG2组, W7、 W8、 W9归为 WG3组, W10和其他的工作 通道没有相关性,可以自己成为一组 WG4;对于保护通道来讲,可以将 Pl、 P2、 P3归为 PG1组, P4、 P5、 P6归为 PG2组, P7可以自成一组 PG3; :¾口图 4所示, 第一节点设备 1和第二节点设备 2对工作通道和保护通道的分组是一致的。
优选地, 第一节点设备 1和第二节点设备 2对工作通道和保护通道进行分 组后, 各自在本地维护保护资源表, 该保护资源表负责记录工作通道组中的工 作通道和保护通道组中的保护通道之间的映射关系, 第一节点设备 1 和第二节
点设备 2需要维护相同的保护资源表。
如表 1所示, 为第一节点设备 1和第二节点设备 2上维护的保护资源表。
表 1: 保护资源表
如表 1中所示, PG1为 WG1的保护通道组, 同时也可以作为 WG2的保护 通道组; PG2为 WG3的保护通道组, W10与其他工作通道的相关性不大, 因此 可以单独成为一组记为 WG4, 为其配置保护通道组 PG3 , 该 PG3中只包含一个 保护通道 P7。 PG4包含两个保护通道 P8和 P9, 其配置为 WG5的保护通道。对 于每一个工作通道组中的工作通道, 可以设定其优先级, 如表 1中所示, W1的 优先级为 1 , W5的优先级为 6, 当然也可以将其优先级设置为"缺省", 表示可 以其优先级为随机的。
如果 WG1中的 W1和 W2可以独立倒换, 虽然其已经归类到 WG1中, 但 也可以单独作为一组进行倒换, 以最大程度的兼容现有技术中的个体倒换模式, 满足一些需要进行个体倒换的工作通道的需要。
优选地, 第一节点设备 1和第二节点设备 2还有维护保护通道组状态表,
以便在工作通道组中的工作通道出现故障时, 在该保护通道组状态表中查找相 应的保护通道组进行倒换。
参见表 2,为本发明的第一节点设备 1和第二节点设备 2上维护的保护通道 组状态表。
表 2: 保护通道组状态表
如表 2所示, 保护通道组状态表用来记录保护通道的使用状态, 位于保护 通道两端的第一节点设备 1和第二节点设备 2需要维护相同的保护通道组状态 表。
通道组的状态应该处于故障或被禁用状态,例如表 2中的 PG4中的保护通道 P8, 其处于故障或被禁用状态, 因此, 对应的 PG4处于故障或被禁用状态, 不能作 为 WG5的保护通道, 但是其中的 P9没有出现故障, 当有工作通道需要进行个 体倒换时, 仍然可以倒换到 P9上进行业务传送。
另外, PG1由于同时作为 WG1和 WG2的保护通道组, 因此, 当其被 WG1 占用时, 其空闲状态标识为 N, 占用状态标识为 Y, 如果这时候 WG2也出现了 整体倒换需求, 则可以根据优先级进行保护通道组抢占, 结合表 1可知, WG3
中的工作通道的优先级小于 WG2中工作通道的优先级, 因此, WG2可以抢占 此刻处于空闲状态的 PG2, 将 WG2 的工作通道上传送的业务倒换到原本属于 WG3的保护通道组 PG2上进行传送。
上述详细说明了第一节点设备 1和第二节点设备 2上需要维护的保护资源 表和保护通道组状态表的具体内容, 以下将具体说明第一节点设备 1 和第二节 工作通道组进行业务倒换。
参见图 5, 图 5为本发明提供的第一节点设备实施例一的具体组成示意图。 本实施例提供的第一节点设备 1 , 包括: 存储模块 10、 查找模块 11、 发送模块 12、 业务倒换模块 13。
存储模块 10, 用于存储第一节点设备 1与另一节点设备 (即第二节点设备 2 )之间的工作通道组与保护通道组之间的映射关系。 用状态。
查找模块 11 , 用于侦测到所述工作通道组中的工作通道出现故障时, 根据 所述存储模块 10中维护的工作通道组与保护通道组之间的映射关系, 为所述工 作通道组查找保护通道组。
发送模块 12,用于通过所述查找模块 11查找到的保护通道组中的保护通道 向另一节点设备发送倒换请求; 其中, 该倒换请求中携带所述工作通道组的标 识, 和工作通道的标识、 保护通道组的标识、 保护通道的标识的其中一种。
业务倒换模块 13, 用于接收所述另一节点设备将保护通道组中的保护通道 与工作通道组中的工作通道进行桥接完成后发出的桥接确认信息, 并响应所述 桥接确认信息将该工作通道组中的所有工作通道上传送的业务整体倒换到所述 保护通道进行传送。
可选地, 所述第一节点设备 1还包括:
分组模块 14, 用于将承载同一个业务的工作通道分为一个工作通道组, 或 将通过相同 良务层路径的工作通道分为一个工作通道组, 并为每个工作通道组 配置至少一个保护通道组。
参见图 6, 图 6为本发明提供的第一节点设备 1中存储模块 10实施例的示
意图。 本实施例中, 存储模块 10包括: 保护资源维护单元 100、 状态维护单元 101。
保护资源维护单元 100, 用于存储工作通道组与保护通道组之间的映射关 系。 存储模块 10的保护资源维护单元 100存储的工作通道和保护通道之间的映 射关系如表 1所示, 状态维护单元 101 中存储的保护通道组中的保护通道的使 用状态如表 2中的空闲、 占用、 禁用状态所示, 在此不再赘述。
查找模块 11根据该状态维护单元 101中维护的保护通道组状态表, 为工作 通道组查找合适的保护通道组, 但在其查找保护通道组之前, 还需要判断该工 作通道组是否是需要整体倒换, 下面就将介绍如何判断工作通道组是否需要整 体倒换, 并为其查找保护通道的实现过程。
参见图 7, 图 7为本发明提供的第一节点设备实施例二的组成示意图。如图 7所示, 本实施提供的第一节点设备 1除了包括实施例一中的各个模块之外, 还 包括:
故障侦测模块 15 , 用于在所述工作通道组中的工作通道为承载同一个业务 的工作通道时, 侦测所述工作通道组中任一工作通道是否出现故障; 具体的, 当所述工作通道组中任一工作通道出现故障时, 确认该工作通道组需要整体倒 换; 或用于在所述工作通道组中的工作通道为通过相同服务层路径的工作通道 时, 侦测所述工作通道组中出现故障的工作通道的数量是否超过一预定值; 具 体地, 当所述工作通道组中出现故障的工作通道的数量超过一预定值时, 确认 该工作通道组需要整体倒换。
需要说明的是, 当工作通道组中的一个工作通道检测到其本端或远端存在 故障, 或者本端或远端存在倒换请求命令时, 则认为该工作通道为故障工作通 道。
在确认工作通道组需要整体倒换时, 第一节点设备 1的查找模块 11根据保 护资源维护单元 100 中存储的保护通道组与工作通道组之间的映射关系, 在状 态存储单元 101 中查找空闲的保护通道组; 当没有空闲的保护通道组时, 选择 比需要整体倒换的工作通道组的优先级低的工作通道组的保护通道组作为需要
整体倒换的工作通道组的保护通道组。 然后通过该保护通道组中的保护通道向 第二节点设备 2发送倒换请求。
结合表 1和表 2举例说明, 表 1中可知, PG1由于同时作为 WG1和 WG2 的保护通道组, 因此, 当其被 WG1占用时, 其空闲状态标识为 N, 占用状态标 识为 Y, 如果这时候 WG2也出现了整体倒换需求, 则可以根据优先级进行保护 通道组抢占, WG3 中的工作通道的优先级小于 WG2中工作通道的优先级, 因 此, WG2可以抢占此刻处于空闲状态的 PG2 , 将 PG2作为 WG2的保护通道, 以便进一步将 WG2 的工作通道上传送的业务倒换到属于 WG3 的保护通道组 PG2上进行传送。
一旦第一节点设备 1 确定选择的保护通道组后, 它会将需要整体倒换的工 作通道组的标识、 以及工作通道的标识、 保护通道组的标识、 保护通道的标识 中的一种携带在倒换请求中发送给第二节点设备 2。 本实施例中对 APS ( Automatic Protection Switching , 自动保护倒换 )消息机制进行扩展来完成倒换 请求传递。
具体地, 图 5中的发送模块 12可以通过以下三种方式将倒换请求发送到第二 节点设备 2, 相应地, 第二节点设备 2也有三种方式来校验工作通道和保护通道 之间的关系, 具体如下:
方式 1: 所述第一节点设备 1在保护通道组的各个保护通道上发送 APS消息, 所述单个保护通道上发送的 APS消息的携带有所述工作通道组的标识,以及发送 该 APS消息的保护通道对应的工作通道的标识;第二节点设备在各个保护通道上 分别接收所述 APS消息,识别所述 APS消息中携带的工作通道组的标识和工作通 道的标识,根据工作通道组与保护通道组之间的映射关系查找接收所述 APS消息 的保护通道对应的工作通道组和工作通道的标识, 校险查找到的所述工作通道 组的标识与识别出的所述工作通道组的标识是否相同, 并且校验查找到的所述 工作通道的标识与识别出的所述工作通道的标识是否相同, 如果上述两个校验 结果都是相同, 校验通过
具体请参见图 8, 图 8是本发明中第一节点设备 1的发送模块 12发送倒换请求 实施例一的示意图。
如图 8所示, 当 WG1中的 W1和 W2发生故障时, 第一节点设备 1的发送模块
将故障 WG的 ID ( WG1 ) , 以及该 WG1中各个工作通道的 ID ( Wl或 W2 )插入到 APS消息的保留字节中,然后在 PG1内的各个保护通道上发送 APS消息,可选地, 该 APS消息中携带相同故障请求类型。 第二节点设备 2分别在保护通道组的各个 保护通道上接收对应 APS信息后, 从 APS消息中识别 WG的 ID ( WG1 )以及工作 通道的 ID ( Wl和 W2 ), 然后根据其本地存储的表 1中的工作通道组与保护通道 组之间的映射关系, 查找接收所述 APS消息的保护通道 P1和 P2对应的 WG和 WG 的 ID, 校验查找到的所述 WG的 ID与识别出的所述 WG的 ID ( WG1 )是否相同, 并且校验查找到的所述工作通道的 ID与识别出的所述工作通道的 ID ( Wl和 W2 ) 是否相同, 如果上述两个校验结果都是相同, 校验通过。
其中, 对 APS消息扩展如下:
第二节点设备 2在第一节点设备 1选择的保护通道上接收该 APS消息,识别该 APS消息中携带的工作通道组的标识以及所有保护通道的标识,根据工作通道组 与保护通道组之间的映射关系, 查找第一节点设备 1选择的保护通道所在的保护 通道组对应的工作通道组的标识以及所述查找到的保护通道组包含的所有保护 通道的标识, 校验所述查找到的工作通道组的标识与所述识别出的工作通道组 的标识是否相同, 并且校验所述查找到的所有保护通道的标识与所述识别出的
所有保护通道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。 具体请参见图 9, 图 9所示的是本发明中发送模块 12发送倒换请求实施例二 的示意图。
如图 9所示, 当 WG1中的 W1和 W2发生故障时, 第一节点设备 1的发送模块 在 PG1内选择一个保护通道 P1 , 在 APS消息中插入 WG的 ID ( WG1 )和 PG1包含 的所有保护通道的 ID ( P1和 P2 )。 第二节点设备 2在第一节点设备 1选择的保护通 道 P2上接收该 APS消息, 识别该 APS消息中携带的 WG的 ID ( WG1 ) 以及所有保 护通道的 ID ( P1和 P2 ) , 根据其本地存储的表 1中的工作通道组与保护通道组之 间的映射关系, 查找第一节点设备 1选择的保护通道 P1所在的 PG1对应的 WG的 ID以及所述查找到的 PG1包含的所有保护通道的 ID,校验所述查找到的 WG的 ID 与所述识别出的 WG的 ID ( WG1 )是否相同, 并且校验所述查找到的所有保护通 道的 ID与所述识别出的所有保护通道的 ID ( P1^P2 )是否相同, 如果上述两个 校验结果都是相同, 校验通过。
其中, 对 APS消息扩展如下:
方式 3: 在所述保护通道与工作通道之间的映射关系中,保护通道与工作通 道的数量相等且对应关系固定, 保护通道组与工作通道组的对应关系固定; 第 一节点设备 1从所述保护通道组中选择一个保护通道发送 APS消息,该 APS消 息中携带有所述工作通道组的标识以及所述保护通道组的标识;
第二节点设备 2在第一节点设备 1选择的保护通道上接收该 APS消息, 识 别该 APS消息中携带的工作通道组标识和保护通道组的标识, 根据工作通道组 与保护通道组之间的映射关系, 查找第一节点设备选择的保护通道所在的保护
通道组的标识以及该查找到的保护通道组对应的工作通道组的标识, 校验所述 查找到的工作通道组的标识与所述识别出的工作通道组的标识是否相同, 并且 同, 如果上述两个校验结果都是相同, 校验通过。
具体请参见图 10, 图 10所本发明中发送模块 12发送倒换请求实施例三的示 如图 10所示, 当 WG1中的 W1和 W2发生故障时, 第一节点设备 1的发送模块 在 PG1内选择一个保护通道, 在 APS消息中插入 WG的 ID ( WG1 ) 和 PG的 ID ( PG1 )。 第二节点设备 2接收到 APS消息后, 识别该 APS消息中携带的 WG的 ID ( WG1 ) , 以及保护通道组的 ID ( WG2 )。在本方案中, WG1中的工作通道和 PG1 中的保护通道之间的映射关系固定。 因此, 第二节点设备 2根据其本地存储的表 1中的工作通道组与保护通道组之间的映射关系, 查找第一节点设备 1选择的保 护通道 P1所在的 PG的 ID以及该查找到的 PG对应的 WG的 ID, 校验所述查找到的 的 ID与所述识别出的 PG的 ID ( PG1 )是否相同, 如果上述两个校验结果都是相 同, 校验通过。
其中, 对 APS消息扩展如下:
第二节点设备 2对工作通道和保护通道之间的映射关系进行校验后, 决定 是否将工作通道组中的各个工作通道和保护通道组中的各个保护通道进行桥 接, 桥接完成, 则向第一节点设备 1返回对应的桥接确认消息, 桥接未完成, 则向第一节点设备 1返回新的倒换请求。
以下将详细描述第一节点设备 1在接收到第二节点设备 2返回的桥接确认 消息或新的倒换请求时, 如何实现业务倒换。
参见图 11 , 图 11为本发明提供的业务倒换模块 13实施例的组成示意图。 本实施例提供的业务倒换模块 13具体包括: 接收单元 130、 业务倒换单元 131、 接收单元 130,用于接收来自第二节点设备 2将保护通道组中的保护通道与 工作通道组中的工作通道进行桥接后返回的桥接确认消息。
业务倒换单元 131 ,用于在接收单元 130接收到第二节点设备 2返回的桥接 确认消息后, 将工作通道上传送的业务倒换到查找到的保护通道组中的保护通 道中进行传送。 可选的, 第一节点设备 1 还在完成业务倒换后, 发出本地已完 成业务倒换的消息给第二节点设备 2。
可选地, 如果第二节点设备 2未完成桥接, 会向第一节点设备 1发送新的 倒换请求, 则第一节点设备 1还需要处理该新的倒换请求。
参见图 12, 图 12为本发明提供的第一节点设备 1实施例二的组成示意图。 如图 12所示, 实施例二中提供的第一节点设备 1 , 除了包括上述存储模块 10、 查找模块 11、 发送模块 12、 业务倒换模块 13、 分组模块 14、 故障侦测模块 15 以外, 还包括: 接收模块 16、 桥接模块 17。
接收模块 16, 用于接收来自第二节点设备 2的倒换请求, 该倒换请求中携 带其未将工作通道和保护通道进行桥接的指示信息以及新的工作通道组中的工 作通道和保护通道组中的保护通道之间的映射关系。
桥接模块 17, 其用于在接收到来自第二节点设备 2的倒换请求后, 对工作 通道和保护通道的映射关系进行校验; 在校验为是时, 将工作通道组的工作通 道和保护通道组中的保护通道进行桥接。
第一节点设备 1的接收模块 14接收到新的倒换请求时, 其桥接模块 15的 具体操作与第二节点设备 2接收到倒换请求的操作相同, 因此以下将详细描述 第二节点设备 2的具体功能和结构。
参见图 13, 图 13为本发明提供的第二节点设备 2实施例一的组成示意图。 本实施例中的第二节点设备 2, 包括: 存储模块 20、接收模块 21、桥接模块 22。
存储模块 20, 用于存储第一节点设备 1与第二节点设备 2之间的工作通道 组与保护通道组之间的映射关系; 可选地, 所述存储模块 20还存储有所述保护
通道组中的各个保护通道的使用状态。
接收模块 21 ,用于接收来自第一节点设备 1通过保护通道发送的倒换请求, 其中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通 道组的标识、 保护通道的标识的其中一种。
具体的, 第一节点设备 1是通过上述的 APS消息, 通过三种方式发送倒换 请求, 相应地, 第二节点设备 2的接收模块 21接收倒换请求的方式有二种, 分 别如下:
用于在保护通道组的各个保护通道上接收 APS消息; 或
用于在第一节点设备 1按序选择的保护通道上接收 APS消息。
第二节点设备 2还包括桥接模块 22,用于在所述接收模块 21接收到来自第 一节点设备 1 的倒换请求后, 对工作通道和保护通道的映射关系进行校验, 校 验通过后, 将所述保护通道组中的保护通道和所述工作通道组的工作通道进行 桥接, 并向所述第一节点设备返回桥接确认信息。
可选地, 第二节点设备 2还包括:
分组模块 23, 用于将承载同一个业务的工作通道分为一个工作通道组, 或 将通过相同 良务层路径的工作通道分为一个工作通道组, 并为每个工作通道组 配置至少一个保护通道组。
发送模块 24,用于在所述桥接模块 22对工作通道和保护通道之间的映射关 系进行校验, 且校验未通过时, 通过保护通道组中的保护通道向所述第二节点 设备 2发送倒换请求, 该倒换请求中携带其未将工作通道和保护通道进行桥接 的指示信息以及新的工作通道组中的工作通道和保护通道组中的保护通道之间 的映射关系。
参见图 14, 图 14为本发明提供的第二节点设备 2的存储模块 20实施例的 组成示意图。
本实施例中, 第二节点设备 2的存储模块 20与第一节点设备 1中的存储模 块 10相同, 也包括: 保护资源维护单元 200和状态维护单元 201。
保护资源维护单元 200, 用于存储工作通道组与保护通道组之间的映射关 系。
状态维护单元 201 , 用于存储保护通道组中保护通道的使用状态。
第二节点设备 2的存储模块 20的具体功能和作用与第一节点设备 1中的存 储模块 10相同, 在此不再赘述。
参见图 15 , 图 15为本发明提供的第二节点设备 2的桥接模块 22实施例的 组成示意图。 本实施例提供的桥接模块 22具体包括: 校验单元 220和桥接单元 221。
校验单元 220, 用于在接收模块 21接收到倒换请求后, 用于根据所述接收 模块接收的倒换请求, 对工作通道和保护通道的映射关系进行校验。
桥接单元 221 , 用于在校验单元 220校验通过时, 将工作通道组的工作通道 和保护通道组中的保护通道进行桥接, 向第一节点设备 1返回桥接确认消息。
校验单元 220对工作通道和保护通道之间的映射关系进行校验有三种方式, 如下:
1 )识别所述接收模块 21在各个保护通道上接收的 APS消息中携带的工作 通道组的标识和工作通道的标识, 根据所述存储模块中存储的工作通道组与保 护通道组之间的映射关系, 查找接收所述 APS消息的保护通道对应的工作通道 组和工作通道的标识, 校验查找到的所述工作通道组的标识与识别出的所述工 作通道组的标识是否相同, 并且校验查找到的所述工作通道的标识与识别出的 所述工作通道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
具体实现过程可见图 8对应的实施例, 在此不再赘述;
2 )识别接收模块 22在第一节点设备 1选择的保护通道上发送的 APS消息 中携带的工作通道组的标识以及所有保护通道的标识, 根据工作通道组与保护 通道组之间的映射关系, 查找另一节点设备选择的保护通道所在的保护通道组 对应的工作通道组的标识以及所述查找到的保护通道组包含的所有保护通道的 标识, 校验所述查找到的工作通道组的标识与所述识别出的工作通道组的标识 是否相同, 并且校验所述查找到的所有保护通道的标识与所述识别出的所有保 护通道是否相同, 如果上述两个校验结果都是相同, 校验通过。
具体实现过程可见图 9对应的实施例, 在此不再赘述;
3 )识别所述接收模块 22在第一节点设备 1选择的保护通道上发送的 APS 消息中携带的工作通道组标识和保护通道组的标识, 根据工作通道组与保护通 道组之间的映射关系, 查找另一节点设备选择的保护通道所在的保护通道组的
标识以及该查找到的保护通道组对应的工作通道组的标识, 校验所述查找到的 工作通道组的标识与所述识别出的工作通道组的标识是否相同, 并且校验所述 上述两个校验结果都是相同, 校验通过。
本发明实施例提供的第二节点设备与第一节点设备之间的工作通道和保护 通道进行了分组, 在工作通道组出现故障需要整体倒换的时候, 可以快速的查 找到与其对应的保护通道进行业务的倒换, 能够提升通道组倒换的效率, 节约 通道倒换的时间, 使得业务传送可以快速恢复正常。 本发明提供的通道组保护 技术, 不受限于具体网络技术以及保护技术, 适用于 SDH ( Synchronous Digital Hierarchy, 同步数字系列)、 OTN ( Optic Transmission Network, 光传送网络)、 MPLS-TP ( Multi-Protocol Label Switch_Transport Profile, 多协议标签交换 -传送 域)、 ETN ( ETHERNET, 以太网)等传送技术领域。
上述实施例描述了本发明提供的通道组保护系统及其中的第一节点设备和 第二节点设备的具体实现, 以下将结合图 16~图 20描述本发明提供的通道组保 护方法的实施例。
参见图 16, 图 16为本发明提供的通道组保护方法实施例一的流程示意图。 本实施例的通道组位于第一节点设备和第二节点设备之间, 所述方法包括:
步骤 100, 第一节点设备侦测到工作通道组中的工作通道出现故障时,根据 工作通道组与保护通道组之间的映射关系, 为该工作通道组查找保护通道组。
步骤 101 ,第二节点设备将第一节点设备查找到的保护通道组中的保护通道 和所述工作通道组中的工作通道进行桥接。
步骤 102,将该工作通道组中的所有工作通道上传送的业务整体倒换到已桥 接的保护通道进行传送。
本实施例提供的方法, 可以在图 4所示的通道组保护系统中实施。
上述工作通道和保护通道是指两个网络节点之间进行业务传送的通道。 下 面具体说明第一节点设备 1和第二节点设备 2对工作通道和保护通道分别进行 分组, 并且在第一节点设备 1和第二节点设备 2上预置工作通道组与保护通道 组之间的映射关系的流程。
参见图 17,图 17为本发明提供的通道组保护方法中对工作通道和保护通道
进行分组的方法实施例的流程示意图。 本实施例提供的方法包括: 步骤 200,将节点设备之间承载同一个业务的工作通道分为一个工作通道组 或将节点设备之间通过相同服务层路径的工作通道分为一个工作通道组。
步骤 201 , 为每个工作通道组配置至少一个保护通道组; 其中, 所述保护通 道组中的保护通道的数量大于等于其保护的工作通道组中的工作通道的数量。
具体地对工作通道和保护通道进行分组如图 4所示, 并且在分组完成后, 需 要在第一节点设备 1和第二节点设备 2上同时维护保护资源表和保护通道组状 态表, 具体如表 1和表 2所示; 本方法实施例可以由如图 5~图 6所示的第一节 点设备 1实现, 在此不再赘述。
下面就将介绍第一节点设备 1 如何判断工作通道组因其中的工作通道发生 故障需要整体倒换, 并为需要整体倒换的工作通道组查找保护通道的实现过程。
具体地, 对于工作通道组中工作通道为 7|载同一个业务的工作通道组时, 侦 测到该工作通道组中的任一工作通道出现故障, 即确认该工作通道组发生故障 需要整体倒换; 对于工作通道组中的工作通道为通过相同服务层路径的工作通 道组时, 当该工作通道组中出现故障的工作通道的数量超过一预定值, 即确认 该工作通道组发生故障需要整体倒换。
需要说明的是, 当工作通道组中的一个工作通道检测到其本端或远端存在故 障, 或者本端或远端存在倒换请求命令时, 则认为该工作通道为故障工作通道。
上述判断工作通道组是否需要整体倒换的情形具体如下:
1 ) 当承载同一个业务的工作通道组中任一工作通道出现故障时, 采用 G.808.1标准 11.1.2章节定义的运算逻辑 1的算法判断该工作通道组是否需要整体 倒换:
W-SFG = Wl-TSF or W2-TSF or W3-TSF
P-SFG = Pl-TSF or P2-TSF or P3-TSF。
其中, SFG表示工作通道组信号失效(Signal Fail Group ); TSF表示路径信 号失效( Trail Signal Fail );
上述表达式的意思是, 当 Wl或者 W2或者 W3等工作通道中任意一个路径信 号失效(记为: Wl-TSF or W2-TSF orW3-TSF ), 则导致整个工作通道组信号失 效(记为: W-SFG ), 需要整体倒换。 同理, 当 P1或者 P2或者 P3等保护通道中任
意一个路径信号失效(记为: Pl-TSF or P2-TSF or P3-TSF ), 则导致整个保护通 道组路径信号失效(记为: P-SFG ), 需要整体倒换。
2 )通过相同服务层路径的工作通道组中出现故障的工作通道的数量超过一 预定值时, 采用 G.808.1标准 11丄2章节定义的运算逻辑 3的算法判断该工作组是 否需要整体倒换:
W-SFG = X% of the Wi-TSF
P-SFG = X% of the Pi-TSF
其中, X% of the Wi-TSF是指出现 TSF指示的工作通道占到整个工作通道组 中所有工作通道数量的百分比, 如果 X%的值达到预定的值, 例如 60%, 则判断 该工作通道组路径信号失效(记为 W-SFG ),同理, X% of the Pi-TSF是指出现 TSF 指示的保护通道占到整个保护通道组中所有保护通道数量的百分比, 如果 X%的 值达到预定的值, 则判断该保护通道组路径信号失效(记为 P-SFG )。
以上是以工作通道(保护通道) 出现路径信号失效(TSF )为例说明如何判 断工作通道组(保护通道组)需要整体倒换, 用表示工作通道或保护通道路出 现路径信号劣化(Trail Signal Degrade, TSD ) 的指示信号, 依据相同的原理可 以判断整个工作通道组或保护通道组是否需要整体倒换。
下面将描述当工作通道组中的工作通道出现故障时, 为该工作通道组查找 保护通道组的方法流程。
参见图 18,图 18为本发明提供的通道组保护方法中查找保护通道组的方法 实施例的流程示意图。 本实施例提供的方法, 包括:
步骤 300,在与工作通道组呈映射关系的至少一个保护通道组中查找空闲的 保护通道组。
步骤 301 , 当没有空闲的保护通道组时, 选择比所述需要整体倒换的工作通 道组优先级低的工作通道组的保护通道组作为需要整体倒换的工作通道组的保 护通道组。
需要说明的是, 当没有空闲的保护通道组时, 可以选择最低优先级的工作 通道组的保护通道组作为需要整体倒换的工作通道组的保护通道组, 也可以选 择其他比需要整体倒换的工作通道组的优先级低的工作通道组的保护通道组作 为需要整体倒换的工作通道组的保护通道组。 结合表 1和表 2举例说明, 表 1
中可知, PG1 由于同时作为 WG1和 WG2的保护通道组, 因此, 当其被 WG1 占用时, 其空闲状态标识为 N, 占用状态标识为 Y, 如果这时候 WG2也出现了 整体倒换需求, 则可以根据优先级进行保护通道组抢占, WG3中的工作通道的 优先级小于 WG2中工作通道的优先级, 因此, WG2可以抢占此刻处于空闲状 态的 PG2, 将 PG2作为 WG2的保护通道, 以便进一步将 WG2的工作通道上传 送的业务倒换到属于 WG3的保护通道组 PG2上进行传送。
一旦确定选择的保护通道组后, 需要整体倒换的工作通道组一端的第一节 点设备 1通过查找到的保护通道组中的保护通道向另一端的第二节点设备 2发 送倒换请求; 该倒换请求中携带所述工作通道组的标识, 或进一步携带有工作 通道的标只或保护通道组的标只或保护通道的标 f、。
本实施例中对现有标准定义的 APS ( Automatic Protection Switching , 自动保 护倒换 ) 消息机制上进行扩展来完成倒换请求传递。
第一节点设备 1发送 APS消息以及第二节点设备 2根据该 APS对工作通道 和保护通道之间的映射关系进行校验具体包括以下三种方式:
方式 1: 第一节点设备 1在保护通道组的各个保护通道上发送 APS消息, 所述 APS消息携带有所述工作通道组的标识, 以及发送该 APS消息的保护通道对应 的工作通道的标识;
第二节点设备 2在各个保护通道上分别接收所述 APS消息, 识别所述 APS 消息中携带的工作通道组的标识和工作通道的标识, 根据工作通道组与保护通 道组之间的映射关系, 查找接收所述 APS消息的保护通道对应的工作通道组和 工作通道的标识, 校验查找到的所述工作通道组的标识与识别出的所述工作通 道组的标识是否相同, 并且校验查找到的所述工作通道的标识与识别出的所述 工作通道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
其具体实现过程如图 8所示, 在此不再赘述。
校验通过时, 所述第二节点设备 2将所述工作通道组的工作通道和保护通 道组中的保护通道进行桥接, 向所述第一节点设备 1 返回桥接确认消息, 所述 第一节点设备 1收到所述第二节点设备 2返回的桥接确认消息后, 将工作通道 上传送的业务整体倒换到查找到的保护通道组中的保护通道中进行传送;
校验未通过时, 所述第二节点设备 2通过保护通道组中的保护通道向所述
第一节点设备 1 发送倒换请求, 该倒换请求中携带其未将工作通道和保护通道 进行桥接的指示信息以及新的工作通道组中的工作通道和保护通道组中的保护 通道之间的映射关系。
方式 2: 第一节点设备 1从所述保护通道组中选择一个保护通道发送 APS 消息, 该 APS消息中携带有所述工作通道组的标识以及所述保护通道组中所有 保护通道的标识;
所述第二节点设备 2在第一节点设备 1选择的保护通道上接收该 APS消息, 识别该 APS消息中携带的工作通道组的标识以及所有保护通道的标识, 根据工 作通道组与保护通道组之间的映射关系, 查找第一节点设备 1 选择的保护通道 所在的保护通道组对应的工作通道组的标识以及所述查找到的保护通道组包含 的所有保护通道的标识, 校验所述查找到的工作通道组的标识与所述识别出的 工作通道组的标识是否相同, 并且校验所述查找到的所有保护通道的标识与所 述识别出的所有保护通道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
其具体实现过程如图 9所示, 在此不再赘述。
校验通过时, 所述第二节点设备 2将所述工作通道组的工作通道和保护通 道组中的保护通道进行桥接, 向所述第一节点设备 1 返回桥接确认消息, 所述 第一节点设备 1收到所述第二节点设备 2返回的桥接确认消息后, 将工作通道 上传送的业务整体倒换到查找到的保护通道组中的保护通道中进行传送;
校验未通过时, 所述第二节点设备 2通过保护通道组中的保护通道向所述 第一节点设备 1 发送倒换请求, 该倒换请求中携带其未将工作通道和保护通道 进行桥接的指示信息以及新的工作通道组中的工作通道和保护通道组中的保护 通道之间的映射关系。
方式 3: 在所述保护通道与工作通道之间的映射关系中,保护通道与工作通 道的数量相等且对应关系固定, 保护通道组与工作通道组的对应关系固定; 第 一节点设备 1从所述保护通道组中选择一个保护通道发送 APS消息,该 APS消 息中携带有所述工作通道组的标识以及所述保护通道组的标识;
所述第二节点设备 2在第一节点设备 1选择的保护通道上接收该 APS消息, 识别该 APS消息中携带的工作通道组标识和保护通道组的标识, 根据工作通道
组与保护通道组之间的映射关系, 查找第一节点设备 1 选择的保护通道所在的 保护通道组的标识以及该查找到的保护通道组对应的工作通道组的标识, 校验 所述查找到的工作通道组的标识与所述识别出的工作通道组的标识是否相同, 否相同, 如果上述两个校验结果都是相同, 校验通过。
其具体实现过程如图 10所示, 在此不再赘述。
校验通过时, 所述第二节点设备 2将所述工作通道组的工作通道和保护通 道组中的保护通道进行桥接, 向所述第一节点设备 1 返回桥接确认消息, 所述 第一节点设备 1收到所述第二节点设备 2返回的桥接确认消息后, 将工作通道 上传送的业务整体倒换到查找到的保护通道组中的保护通道中进行传送;
校验未通过时, 所述第二节点设备 2通过保护通道组中的保护通道向所述 第一节点设备 1 发送倒换请求, 该倒换请求中携带其未将工作通道和保护通道 进行桥接的指示信息以及新的工作通道组中的工作通道和保护通道组中的保护 通道之间的映射关系。
以下将详细描述本发明提供的第一节点设备 1在接收到第二节点设备 2返 回的桥接确认消息或新的倒换请求时, 进行业务倒换的流程。
参见图 19,图 19为本发明提供的通道组保护方法中第一节点设备 1进行业 务倒换方法流程实施例的流程示意图。 本实施例提供的方法, 包括:
步骤 400, 第一节点设备 1收第二节点设备 2返回的桥接确认消息。
步骤 401 ,第一节点设备 1将工作通道上传送的业务整体倒换到已桥接的保 护通道组中的保护通道中进行传送。
可选的, 该方法还包括:
步骤 402, 第一节点设备 1在完成业务倒换后, 发出本地已完成业务倒换的 消息给第二节点设备 2。
下面将描述如果第二节点设备 2未完成对保护通道与工作通道的桥接, 向 第一节点设备 1发送新的倒换请求, 则第一节点设备 1还需要处理该新的倒换 请求。
参见图 20,图 20为本发明提供的通道组保护方法中第一节点设备 1进行通 道桥接方法实施例的流程示意图。
本实施例的方法, 包括:
步骤 500, 第一节点设备 1收第二节点设备 2返回的倒换请求。
步骤 501 ,第一节点设备 1对工作通道和保护通道之间的映射关系进行校验; 第一节点设备 1 对工作通道和保护通道之间的映射关系进行校验的过程和第二 节点设备 2—致, 在此不再赘述。
步骤 502, 校验为是时, 第一节点设备 1将工作通道组的工作通道和保护通 道组中的保护通道进行桥接, 向第二节点设备 2返回桥接确认消息。
实施例本发明提供的通道组保护方法、 由于将第二节点设备 2与第一节点 设备 1之间的工作通道和保护通道进行了分组, 在工作通道组出现故障需要整 体倒换的时候, 可以快速的查找到与其对应的保护通道进行业务的倒换, 能够 提升通道组倒换的效率, 节约通道倒换的时间, 使得业务传送可以快速恢复正 常。 适用于 SDH ( Synchronous Digital Hierarchy , 同步数字系列)、 ΟΤΝ ( Optic Transmission Network , 光传输网络)、 MPLS-TP ( Multi-Protocol Label Switch .Transport Profile, 多协议标签交换 -传送域)、 ETN ( ETHERNET, 以太网)等 传送技术领域。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程, 是可以通过计算机程序来指令相关的硬件来完成, 所述的程序可存储于一计算 机可读取存储介质中, 该程序在执行时, 可包括如上述各方法的实施例的流程。 其中, 所述的存储介质可为磁碟、 光盘、 只读存储记忆体(Read-Only Memory, ROM )或随机存储记忆体(Random Access Memory, RAM )等。
以上所述是本发明的优选实施模式, 应当指出, 对于本技术领域的普通技 术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进和润饰, 这 些改进和润饰也视为本发明的保护范围。
Claims
1、 一种通道组保护方法, 所述通道组位于第一节点设备和第二节点设备之 间, 其特征在于, 包括:
第一节点设备侦测到工作通道组中的工作通道出现故障时, 根据工作通道 组与保护通道组之间的映射关系, 为所述工作通道组查找保护通道组;
第二节点设备将第一节点设备查找到的保护通道组中的保护通道和所述工 作通道组中的工作通道进行桥接; 并且
第一节点设备将该工作通道组中的所有工作通道上传送的业务整体倒换到 已桥接的保护通道进行传送。
2、 如权利要求 1所述的通道组保护方法, 其特征在于, 还包括: 将承载同 一个业务的工作通道分为一个工作通道组; 为每个工作通道组配置至少一个保 护通道组; 所述侦测到工作通道组中的工作通道出现故障包括: 侦测到工作通 道组中的任一工作通道出现故障。
3、 如权利要求 1所述的通道组保护方法, 其特征在于, 还包括: 将通过相 同服务层路径的工作通道分为一个工作通道组; 为每个工作通道组配置至少一 个保护通道组;
所述侦测到工作通道组中的工作通道出现故障包括:所述工作通道组中出现 故障的工作通道的数量超过一预定值。
4、 如权利要求 1至 3中任一项所述的通道组保护方法, 其特征在于, 为所 述工作通道组查找到保护通道组之后, 还包括:
第一节点设备通过查找到的保护通道组中的保护通道向第二节点设备发送 倒换请求, 其中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标 识、 保护通道组的标识、 保护通道的标识的其中一种;
第二节点设备根据接收到的所述倒换请求对工作通道和保护通道的映射关 系进行校验, 校验通过后, 将所述保护通道组中的保护通道和所述工作通道组 的工作通道进行桥接。
5、 如权利要求 4所述的通道组保护方法, 其特征在于, 所述倒换请求为自 动保护倒换 APS消息; 第一节点设备发送所述 APS消息和第二节点设备进行校 验的步骤包括:
所述第一节点设备在保护通道组的各个保护通道上发送 APS 消息, 所述 APS消息携带有所述工作通道组的标识, 以及发送该 APS消息的保护通道对应 的工作通道的标识;
所述第二节点设备在各个保护通道上分别接收所述 APS 消息, 识别所述 APS 消息中携带的工作通道组的标识和工作通道的标识, 根据工作通道组与保 护通道组之间的映射关系, 查找接收所述 APS消息的保护通道对应的工作通道 组和工作通道的标识, 校验查找到的所述工作通道组的标识与识别出的所述工 作通道组的标识是否相同, 并且校验查找到的所述工作通道的标识与识别出的 所述工作通道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
6、 如权利要求 4所述的通道组保护方法, 其特征在于, 所述倒换请求为自 动保护倒换 APS消息; 第一节点设备发送所述 APS消息和第二节点设备进行校 验的步骤包括:
第一节点设备从所述保护通道组中选择一个保护通道发送所述 APS消息, 道的标识;
所述第二节点设备在第一节点设备选择的保护通道上接收该 APS消息, 识 别该 APS消息中携带的工作通道组的标识以及所有保护通道的标识, 根据工作 通道组与保护通道组之间的映射关系, 查找第一节点设备选择的保护通道所在 的保护通道组对应的工作通道组的标识以及所述查找到的保护通道组包含的所 有保护通道的标识, 校验所述查找到的工作通道组的标识与所述识别出的工作 通道组的标识是否相同, 并且校验所述查找到的所有保护通道的标识与所述识 别出的所有保护通道的标识是否相同, 如果上述两个校验结果都是相同, 校验 通过。
7、 如权利要求 4所述的通道组保护方法, 其特征在于, 在所述保护通道与 工作通道之间的映射关系中, 保护通道与工作通道的数量相等且对应关系固定, 保护通道组与工作通道组的对应关系固定; 所述倒换请求为自动保护倒换 APS 消息; 第一节点设备发送所述 APS消息和第二节点设备进行校验的步骤包括: 第一节点设备从所述保护通道组中选择一个保护通道发送该 APS消息, 该 APS消息中携带有所述工作通道组的标识以及所述保护通道组的标识;
所述第二节点设备在第一节点设备选择的保护通道上接收该 APS消息, 识 别该 APS消息中携带的工作通道组标识和保护通道组的标识, 根据工作通道组 与保护通道组之间的映射关系, 查找第一节点设备选择的保护通道所在的保护 通道组的标识以及该查找到的保护通道组对应的工作通道组的标识, 校验所述 查找到的工作通道组的标识与所述识别出的工作通道组的标识是否相同, 并且 校验所述查找 ^
同, 如果上述两个校验结果都是相同, 校验通过。
8、 一种节点设备, 其特征在于, 包括:
存储模块, 用于存储所述节点设备与另一节点设备之间的工作通道组与保 护通道组之间的映射关系;
查找模块, 用于侦测到所述工作通道组中的工作通道出现故障时, 根据所 述存储模块中维护的工作通道组与保护通道组之间的映射关系, 为所述工作通 道组查找保护通道组;
发送模块, 用于通过所述查找模块查找到的保护通道组中的保护通道向另 一节点设备发送倒换请求;
业务倒换模块, 用于接收所述另一节点设备根据所述倒换请求将保护通道 组中的保护通道与工作通道组中的工作通道进行桥接完成后发出的桥接确认信 息, 并响应所述桥接确认信息将该工作通道组中的所有工作通道上传送的业务 整体倒换到已桥接的保护通道进行传送。
9、 如权利要求 8所述的节点设备, 其特征在于, 所述节点设备还包括: 分组模块, 用于将承载同一个业务的工作通道分为一个工作通道组, 并为 每个工作通道组配置至少一个保护通道组;
故障侦测模块, 用于在所述工作通道组中的工作通道为承载同一个业务的 工作通道时, 侦测所述工作通道组中任一工作通道是否出现故障。
10、 如权利要求 8所述的节点设备, 其特征在于, 所述节点设备还包括: 分组模块, 用于将通过相同服务层路径的工作通道分为一个工作通道组, 并为每个工作通道组配置至少一个保护通道组;
故障侦测模块, 用于在所述工作通道组中的工作通道为通过相同服务层路 径的工作通道时, 侦测所述工作通道组中出现故障的工作通道的数量是否超过 一预定值。
11、 如权利要求 8至 10中任一项所述的节点设备, 其特征在于, 所述倒换 请求为自动保护倒换 APS消息, 所述发送模块用于在保护通道组的各个保护通 道上发送 APS消息, 所述 APS消息携带有所述工作通道组的标识, 以及发送该 APS消息的保护通道对应的工作通道的标识; 或
用于从所述保护通道组中选择一个保护通道发送所述 APS消息,该 APS消 识; 或
用于从所述保护通道组中选择一个保护通道发送该 APS消息,该 APS消息 中携带有所述工作通道组的标识以及所述保护通道组的标识。
12、 一种节点设备, 其特征在于, 包括:
存储模块, 用于存储所述节点设备与另一节点设备之间的工作通道组与保 护通道组之间的映射关系;
接收模块, 用于接收来自另一节点设备通过保护通道发送的倒换请求; 其 中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通道 组的标识、 保护通道的标识的其中一种;
桥接模块, 用于对工作通道和保护通道的映射关系进行校验, 校验通过后, 将所述保护通道组中的保护通道和所述工作通道组的工作通道进行桥接, 并向 所述另一节点设备返回桥接确认信息。
13、 如权利要求 12所述的节点设备, 其特征在于, 所述节点设备还包括: 分组模块, 用于将承载同一个业务的工作通道分为一个工作通道组, 并为 每个工作通道组配置至少一个保护通道组。
14、 如权利要求 12所述的节点设备, 其特征在于, 所述节点设备还包括: 分组模块, 用于将通过相同服务层路径的工作通道分为一个工作通道组, 并为每个工作通道组配置至少一个保护通道组。
15、 如权利要求 12至 14中任一项所述的节点设备, 其特征在于, 所述桥 接模块, 包括:
校验单元, 用于根据所述接收模块接收的倒换请求, 对工作通道和保护通 道的映射关系进行校验;
桥接单元, 用于在所述校验单元校验通过后, 将所述保护通道组中的保护 通道和所述工作通道组的工作通道进行桥接。
16、 如权利要求 15所述的节点设备, 其特征在于, 所述倒换请求为自动保 护倒换 APS消息;
所述接收模块用于在各个保护通道上分别接收所述 APS消息,所述 APS消 息携带有所述工作通道组的标识, 以及发送该 APS消息的保护通道对应的工作 通道的标识;
所述桥接模块的校验单元用于识别所述 APS消息中携带的工作通道组的标 识和工作通道的标识, 根据所述存储模块中存储的工作通道组与保护通道组之 间的映射关系, 查找接收所述 APS消息的保护通道对应的工作通道组和工作通 道的标识, 校验查找到的所述工作通道组的标识与识别出的所述工作通道组的 标识是否相同, 并且校验查找到的所述工作通道的标识与识别出的所述工作通 道的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
17、 如权利要求 15所述的节点设备, 其特征在于, 所述倒换请求为自动保 护倒换 APS消息;
所述接收模块用于在所述另一节点设备选择的保护通道上接收所述 APS消 息; 该 APS消息中携带有所述工作通道组的标识以及所述保护通道组中所有保 护通道的标识;
所述桥接模块的校验单元用于识别该 APS消息中携带的工作通道组的标识 以及所有保护通道的标识, 根据工作通道组与保护通道组之间的映射关系, 查 找另一节点设备选择的保护通道所在的保护通道组对应的工作通道组的标识以 及所述查找到的保护通道组包含的所有保护通道的标识, 校验所述查找到的工 作通道组的标识与所述识别出的工作通道组的标识是否相同, 并且校验所述查 两个校验结果都是相同, 校验通过。
18、 如权利要求 15所述的节点设备, 其特征在于, 所述倒换请求为自动保 护倒换 APS消息;
所述接收模块用于在另一节点设备选择的保护通道上接收所述 APS消息; 则所述桥接模块中的校验单元用于识别该 APS消息中携带的工作通道组标 识和保护通道组的标识, 根据工作通道组与保护通道组之间的映射关系, 查找 另一节点设备选择的保护通道所在的保护通道组的标识以及该查找到的保护通 道组对应的工作通道组的标识, 校险所述查找到的工作通道组的标识与所述识 别出的工作通道组的标识是否相同, 并且校验所述查找到的保护通道组的标识 与所述识别出的保护通道组的标识是否相同, 如果上述两个校验结果都是相同, 校验通过。
19、 一种通道组保护系统, 其特征在于, 包括: 包括第一节点设备和第二 节点设备;
所述第一节点设备和第二节点设备用于存储所述第一节点设备与第二节点 设备之间的工作通道组与保护通道组之间的映射关系; 所述第一节点设备还用于侦测到工作通道组中的工作通道出现故障时, 根 据工作通道组与保护通道组之间的映射关系, 为所述工作通道组查找保护通道 组; 并通过查找到的保护通道组中的保护通道向第二节点设备发送倒换请求; 所述第二节点设备还用于在接收到倒换请求后, 对工作通道和保护通道的 映射关系进行校验; 在校验通过时, 将所述保护通道组中的保护通道和所述工 作通道组的工作通道进行桥接;
所述第一节点设备还用于将所述工作通道组中的所有工作通道上传送的业 务整体倒换到已桥接的保护通道进行传送。
20、 如权利要求 19所述的系统, 其特征在于, 所述第一节点设备包括: 存储模块, 用于存储所述节点设备与第二节点设备之间的工作通道组与保 护通道组之间的映射关系;
查找模块, 用于侦测到所述工作通道组中的工作通道出现故障时, 根据所 述存储模块中维护的工作通道组与保护通道组之间的映射关系, 为所述工作通 道组查找保护通道组;
发送模块, 用于通过所述查找模块查找到的保护通道组中的保护通道向第 二节点设备发送倒换请求, 其中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通道组的标识、 保护通道的标识的其中一种;
业务倒换模块, 用于接收所述第二节点设备将保护通道组中的保护通道与 工作通道组中的工作通道进行桥接完成后发出的桥接确认信息, 并响应所述桥 接确认信息将该工作通道组中的所有工作通道上传送的业务整体倒换到已桥接 的保护通道进行传送。
21、 如权利要求 19或 20所述的系统, 其特征在于, 所述第二节点设备包 括:
存储模块, 用于存储所述节点设备与第一节点设备之间的工作通道组与保 护通道组之间的映射关系;
接收模块, 用于接收来自第一节点设备通过保护通道发送的倒换请求; 其 中, 该倒换请求中携带所述工作通道组的标识, 和工作通道的标识、 保护通道 组的标识、 保护通道的标识的其中一种;
桥接模块, 用于对工作通道和保护通道的映射关系进行校验, 校验通过后, 将所述保护通道组中的保护通道和所述工作通道组的工作通道进行桥接, 并向 所述第一节点设备返回桥接确认信息。
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