WO2014075594A1 - 基于多环结构网络相交环的业务的传输保护方法及装置 - Google Patents

基于多环结构网络相交环的业务的传输保护方法及装置 Download PDF

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Publication number
WO2014075594A1
WO2014075594A1 PCT/CN2013/086852 CN2013086852W WO2014075594A1 WO 2014075594 A1 WO2014075594 A1 WO 2014075594A1 CN 2013086852 W CN2013086852 W CN 2013086852W WO 2014075594 A1 WO2014075594 A1 WO 2014075594A1
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Prior art keywords
node
ring
service
ring network
outgoing
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PCT/CN2013/086852
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English (en)
French (fr)
Inventor
程伟强
王磊
李晗
叶雯
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中国移动通信集团公司
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Publication of WO2014075594A1 publication Critical patent/WO2014075594A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/14—Monitoring arrangements

Definitions

  • the present application relates to the field of communication network technologies, and in particular, to a transmission protection method for a service based on a multi-ring structure network intersecting ring and a corresponding device thereof.
  • the multi-ring structure network is composed of at least two single-ring networks, which are a network topology commonly used in the field of communication technologies. Compared with other network topologies, multi-ring structure networks can improve network survivability to a large extent (Survivability), when a network device node or node link fails, the network self-healing in a very short time to maintain some tolerance. The level of service level). Since the multi-ring network structure includes multiple single-ring networks, there are mainly two relationships of separation and intersection between the two ring networks. When the two ring networks intersect, an intersecting ring is formed through the shared link, and the nodes intersecting the two ring networks are Interconnected nodes.
  • FIG. 1 In the environment of multi-replacement network intersecting ring, a way to realize service transmission protection is shown in Figure 1.
  • the network service Q in the figure is connected to the ring network by node 2, and the node 8 is out of the ring network 2.
  • the working channel of service Q is 2-1-5-4-8, which is connected through nodes 5 and 4.
  • the protection channel for the Q service is path M (consisting of M1 ⁇ M5) on ring 1 and path N (composed of N1 N5) on ring 2.
  • the Q traffic transmitted to the node 1 or the Q traffic of the node 2 is switched to the protection path M and sent back to the node 4, and the node 4 is based on the pre-established services Q and M, The association of N switches the Q traffic to ring 2 and continues to the destination node 8.
  • the foregoing service transmission protection mode needs to be performed according to the association of two or more paths pre-established between the upper and lower loops when implementing the cross-ring operation from the ring network 1 to the ring network 2, since these paths involve two ring networks globally.
  • the two adjacent rings are logically independent, which increases the complexity of the intersecting ring protection, and does not conform to the basic idea of MPLS.
  • the foregoing service transmission protection mode can only solve the problem of the interconnection node failure, and cannot solve the service transmission protection when the multi-node or the node link including the interconnection node failure is in an abnormal state. Summary of the invention
  • the embodiment of the present application provides a transmission protection method for a service based on a multi-ring network structure network intersecting ring and a corresponding device thereof, so as to avoid service transmission protection by reducing the global manner of the upper and lower ring networks, and reduce intersecting.
  • the complexity of ring span protection is a transmission protection method for a service based on a multi-ring network structure network intersecting ring and a corresponding device thereof, so as to avoid service transmission protection by reducing the global manner of the upper and lower ring networks, and reduce intersecting.
  • the service channel is transmitted to the interconnection node through the working channel or the protection channel of the ring network where the ringing node of the service is located, if the ringing node of the reachable service of the interconnected node is determined according to the state information of the intersecting ring topology, then The interconnecting node crosses the information of the outgoing ring node to the ring network where the outgoing ring node is located, and the interconnecting node shares the information of the outgoing ring node of the service in advance, and the ring network where the ringing node is located and the ring network where the outgoing ring node is located share the intersecting ring topology. Park status information;
  • the service is transmitted to the egress node through the working channel or protection channel of the ring network where the egress ring is located.
  • the ring network in which the interconnection node crosses the ring to the ring node according to the information of the outgoing ring node includes:
  • the working channel or protection channel label of the ring network where the ring-in node is located is carried out from the message, and the working channel or protection channel label of the ring network where the ring node is located is pushed into the bearer service.
  • the working channel or the protection channel of the ring network includes a ring channel logic layer, and the working channel or the protection channel label of the ring network where the ringing node is carried by the message carrying the service is stripped from the message, and the ring where the ring node is located
  • the message that the working channel or protection channel label of the network is pushed into the bearer service specifically includes:
  • the working channel or the protection channel label of the ring network where the ring-in node is carried is carried out from the ring channel logical layer of the message carrying the service, and the working channel or protection channel label of the ring network where the ring-out node is located is pushed into the bearer service.
  • the loop channel logic layer of the message is carried out from the ring channel logical layer of the message carrying the service, and the working channel or protection channel label of the ring network where the ring-out node is located is pushed into the bearer service.
  • the working channel or the protection channel of the ring network in which the ringing node of the service is located transmits the service to the interconnecting node, and specifically includes:
  • the switch works to the working channel or the protection channel of the ring network where the ring entry node is located, and transfers the service to the interconnect node through the switched working channel or protection channel; and / or,
  • the transmitting, by the working channel or the protection channel of the ring network where the ring-out node is located, the service to the outgoing ring node includes:
  • the ring network topology of the ring network where the ring-out node is located is in the preset state, it is switched to the working channel or protection channel of the ring network where the ring-out node is located, and the service is transmitted to the ring-out node through the switched working channel or protection channel.
  • the interconnection node pre-shares the information of the outgoing ring node of the service, and the pre-shared ring topology state information of the ring network where the ring-entry node is located and the ring network where the ring-out node is located includes:
  • An interconnecting node of a neighboring interconnect node sends the outbound node information configured through its own service to another interconnected node in real time or periodically to share the information of the outgoing loop node of the service; Or when the state of the node link changes, the state change of the node or the node link is notified to the other nodes of the ring network where the ring-in node is located, and the ring network of the ring-in node is located. After receiving the state change notification, the interconnecting node notifies the state change to each node of the ring network where the ring-out node is located to share the topology state information of the ring network where the ring-in node is located;
  • the state change of the read node or the node link is notified to the ring network where the ring-out node is located, node-by-node direction away from the node link direction that is changed from the state.
  • the node of the ring network where the ring-out node is located receives the state change notification and notifies the state change to each node of the ring network where the ring-entry node is located to share the topology state information of the ring network where the ring-out node is located.
  • the looping node that determines whether the service is reachable from the interconnected node according to the intersection ring topology state information is specifically:
  • the service self-interconnecting node is reachable to the outgoing node of the service according to the intersecting ring topology state information.
  • the embodiment of the present application further provides a transmission protection apparatus based on a service of an intersecting ring of a multi-ring structure network.
  • the device comprises: a first service transmission unit, a reachability determination unit, a cross-loop operation unit and a second service transmission unit, wherein:
  • the first service transmission unit is configured to transmit the service to the interconnection node by using a working channel or a protection channel of the ring network where the ingress ring node of the service is located, where the interconnection node shares the outgoing node information ij of the service in advance.
  • the reachability determining unit is configured to determine, according to the intersecting ring topology state information, whether the service self-connected node is reachable to the service ringing node;
  • the cross-loop operation unit is configured to: when the service channel is transmitted to the interconnection node by the working channel or the protection channel of the ring network where the ingress ring node of the service is located, if the reachability determination unit determines the service self according to the intersection ring topology state information
  • the outgoing node of the interconnected node can reach the ringing node of the service, and the interconnecting node crosses the ringing node information to the ring network where the outgoing ring node is located, and the ring network where the ringing node is located and the ring network where the outgoing ring node is located share the intersecting ring in advance.
  • Topological status information ;
  • the second service transmission unit is configured to transmit the service to the egress node through a working channel or a protection channel of the ring network where the egress ring node is located.
  • the cross-loop operation unit includes a label stripping sub-unit and a label push-in sub-unit, wherein: the label stripping sub-unit is configured to: the working channel or protection of the ring network where the ring-in node is carried by the message carrying the service The channel label is stripped from the message;
  • the label is pushed into the sub-unit, and is used to push the working channel or the protection channel label of the ring network where the ring-out node is located into the bearer service message.
  • the service working channel or the protection channel includes a ring channel logic layer
  • the label stripping sub-unit is specifically configured to: carry the working channel or the protection channel label of the ring network where the ring-in node that is carried by the bearer service message from the bearer service The ring channel logical layer of the message is stripped.
  • the label push subunit is specifically used to push the working channel or the protection channel label of the ring network where the ring node is located into the ring channel logic layer of the message carrying the service.
  • the first service transmission unit includes a first state determining subunit and a first service transmission subunit, where: the first state determining subunit is configured to determine a ring topology of a ring network where the ringing node is located Whether the state is a preset state, if yes, the switch is switched to the working channel or the protection channel of the ring network where the ring-in node is located; the first service transmission sub-unit is configured to transmit the service to the working channel or the protection channel after the switching Interconnected node; and/or,
  • the second service transmission unit includes a second state determination subunit and a second service transmission subunit, where: the second state determination subunit is configured to determine whether a ring network topology state of the ring network where the ring node is located is The preset state, if yes, is switched to the working channel or the protection channel of the ring network where the ring-out node is located; the second service transmission sub-unit is configured to transmit the service to the outgoing ring node through the switched working channel or the protection channel .
  • the device includes a shared information configuration unit, configured to configure an interconnecting node of each intersecting ring of the multi-ring structure network, so that the information of the outgoing node of the shared service between the adjacent interconnected nodes, and the ring network where the incoming ring node is located
  • the ring network in which the ring node is located shares the intersecting ring topology state information
  • the shared information configuration unit specifically includes the outbound node information sharing subunit and the ring network topology state sharing subunit, where:
  • the outbound node information sharing subunit is configured to send the outbound node information of the service configured by one of the interconnected nodes of the adjacent interconnecting node to another interconnected node in real time or periodically;
  • the ring network topology state sharing sub-unit is configured to change a state of the node or the node link to a node link direction that changes away from the state when the state of the node or the node link of the ring network where the ring-in node is located changes. Notifying the other nodes of the ring network where the ringing node is located on a node-by-node basis; after receiving the state change notification, the interconnecting node of the ring network where the ringing node is located notifies the state change to each node of the ring network where the ring-out node is located;
  • the ring network topology sharing sub-unit is further configured to change a state of the node or the node link to a node link that changes away from the state when the state of the node or the node link of the ring network where the ring-out node is located changes.
  • the direction is notified to the other nodes of the ring network where the ring-out node is located, and the state-of-the-art node of the ring network where the ring-out node is located receives the state change notification, and then notifies the node of the ring network where the ring-in node is located.
  • the reachability determining unit is configured to determine, at the ingress ring node or the interconnecting node, whether the service self-interconnecting node is reachable by the ringing node according to the intersecting ring topology state information.
  • the ring node information is shared between the interconnected nodes and the intersecting ring topology state information between the ring network and the ring network where the ring-out node is located.
  • the interconnect node can reach the ring node.
  • the read interconnect node uses the information of the outgoing ring node to transmit to the ring network where the outgoing ring node is located.
  • the embodiment of the present application shares the ring node information between the interconnected nodes, the neighboring interconnected node can be regarded as a virtual node, and the interconnected node that the service determined by the service configuration should pass through fails.
  • the other interconnecting nodes can implement the cross-ring according to the information of the outgoing ring node.
  • the cross-ring mode does not need to be associated with the global of the two single-ring networks of the intersecting ring, so that the two ring networks are logically independent. It reduces the transmission protection complexity of intersecting ring-based services and conforms to the basic idea of MPLS.
  • FIG. 1 is a schematic diagram of service transmission protection in a multi-ring structure network intersecting ring environment
  • FIG. 2 is a flowchart of an embodiment of a transmission protection method based on a multi-ring network intersecting ring
  • FIG. 3 (a) is the application Schematic diagram of the service transmission process under the normal condition of the intersecting ring
  • FIG. 3 (b) is a schematic diagram of the service transmission process in the case of the interconnection node failure of the present application
  • FIG. 3 (c) is the non-interconnected node link failure situation of the present application.
  • Figure 3 (d) is a schematic diagram of the service transmission process in the case where the link between the interconnected node and the non-interconnected node are both faulty;
  • FIG. 4 is a structural block diagram of an embodiment of a transmission protection apparatus for a multi-ring network intersecting ring based service according to the present application.
  • FIG. 2 there is shown a flow of an embodiment of a transmission protection method for a multi-ring network intersecting ring based service of the present application.
  • This embodiment includes:
  • Step S201 Configuring an interconnection node of the intersecting ring of the multi-ring structure network, so that the ring-out node information of the service sharing between the adjacent interconnection nodes, and the ring network state where the ring network where the ring-entry node is located and the ring network where the ring-out node is located are shared. ;
  • the "service based on each intersecting ring of the multi-ring and multi-ring network” in this embodiment refers to any node in a ring network of the multi-ring network entering the ring, and in another adjacent ring network of the multi-ring network, ⁇ A node outbound business.
  • the nodes on the ring network can be divided into three categories: one is the ingress node of the access service, and the other is the intermediate ring node of the transmission service.
  • the third type is the outgoing node of the output service.
  • These three types of nodes play their respective roles in the process of transmitting a single network service.
  • any node on the ring network It is possible to have the functions of three types of nodes at the same time.
  • the multi-ring structure network includes a plurality of single-ring networks.
  • the intersections of adjacent ring networks are usually two or more.
  • the intersection points are interconnection nodes, and the interconnection nodes share the link to belong to a ring network.
  • the node also belongs to the node on the other ring network.
  • the operation of these interconnected nodes on the two ring networks is not of course shared, and they are independent when they work on each ring.
  • they need to be configured.
  • the purpose of the configuration is to make two adjacent interconnected nodes share the information of the outgoing ring nodes, and to make the two ring networks of the intersecting rings through the interconnecting nodes. It is possible to share the state information of the entire intersecting ring.
  • the configuration method for sharing the information about the ring node and the network of the ringing node and the network where the ringing node is located is not limited, and may be manually configured or by means of an automated device. Pre-set rules are configured, such as using network management software.
  • the specific configuration of the information about the shared ring node is not limited. However, in the actual application, the present application preferably completes the information configuration of the shared ring node as follows: One interconnected node of the adjacent interconnect node will be configured. The outgoing node information of its own service is sent to another interconnected node in real time or periodically, so that neighboring interconnected nodes can know each other's outgoing node information.
  • an interaction time mechanism of the information about the outgoing node between adjacent interconnected nodes may be configured, for example, may be performed in real time or periodically.
  • the configuration of the interconnecting ring topology state information is not limited to the configuration of the interconnecting node and the looping node in the ring network.
  • the present application preferably completes the configuration as follows:
  • the state change of the node or the node link is notified to the entry link node by node toward the node link direction that is away from the state change.
  • the other node of the ring network where the point is located; the interconnecting node of the ring network where the ring-input node is located receives the status change notification and notifies the status change to each node of the ring network where the ring-out node is located;
  • the state change of the node or the node link is notified to the link node by node direction away from the node link direction that is changed from the state.
  • the other nodes of the ring network where the point is located; the interconnection node of the ring network where the ring-out node is located receives the status change notification and notifies the status change to each node of the ring network where the ring-in node is located.
  • the above configuration process is based on the fact that the interconnected node is both in the ring network where the ring-in node is located and also in the ring-out node.
  • the "double identity" of the interconnected node will be known in the ring network where the ring-in node is located.
  • the state information of the ring is notified to the nodes in the ring network where the ring-out node is located, and the topology state information of the ring network learned in the ring network where the ring-out node is located is notified to each node in the ring network where the ring-out node is located, so that Each node of the two single ring networks can grasp the network topology state of the entire intersecting ring.
  • various message transmission protocols may be used for message transmission, such as adopting the APS protocol.
  • Step S202 When the service is transmitted to the interconnection node through the working channel or the protection channel of the ring network where the ring-entry node is located, if it is determined according to the intersecting ring topology state information that the service can reach the ring-out node from the interconnected node, then the interconnection is performed.
  • the node crosses the ring according to the information of the outgoing ring node to the ring network where the outgoing ring node is located;
  • the service may be transmitted to the interconnected node through the working channel or protection channel of the ring network where the ring-entry node resides.
  • the first ring is the ring network where the ring-in node is located.
  • the topology of the ring network is normal.
  • the service is directly transmitted to the interconnection node through the working channel of the ring network.
  • the topology state of the ring network of the ring network where the ring-entry node is located appears in a preset state.
  • the switching between the working channel and the protection channel between the preset state or the non-preset state may be at the ingress node of the service, or in front of a certain fault node in the service transmission process.
  • the switching mode in the former case is the Steering protection mode of the ring network
  • the switching mode in the latter case is the Wrapping protection mode of the ring network.
  • the service When the service is transmitted to the interconnection node through the working channel or the protection channel of the ring network where the ring node is located, whether the service based on the topology information of the intersecting ring determines whether the service node can reach the ring node or not depends on whether the ring node is reachable.
  • the cross-ring is implemented, that is, the ring network where the ring-in node is located is switched to the ring network where the ring-out node is located.
  • the judgment based on the intersecting ring topology state information whether the service self-interconnect node can reach the ring-out node can be in the link is performed (similar to the Steering protection method described above), and can also be performed at the interconnection node when the service is transmitted to the interconnection node (similar to the aforementioned Wrapping protection method). It is worth noting that: In the former case (determination of reachability at the ingress node), the "interconnecting node" to which the service of this step is transmitted is the direct interconnect node to which the service is transmitted, in the latter case.
  • the "interconnect node" to which the service of this step is transmitted is the last interconnected node with reachability, and the service received by the read interconnect node may be judged not at other interconnected nodes. The time is transferred to the service of the interconnection node.
  • the cross-ring is implemented at the interconnected node.
  • the embodiment performs the cross-ring operation by using the information of the out-of-loop node, which can be implemented as follows: The working channel or the protection channel label of the ring network where the ring-in node is carried is carried by the message carrying the service from The message is stripped, and the working channel or protection channel label of the ring network where the ring node is located is pushed into the bearer service.
  • a service channel may include multiple logical layers, such as a PW layer, a service layer, and a ring channel logic layer.
  • the above-mentioned cross-loop operation is mainly performed at the logical layer of the ring channel, and If the working channel or the protection channel label of the ring network where the ring-in node is carried is separated from the ring channel logical layer of the message carrying the service, the other layer of the inner layer does not cross-loop.
  • the working channel or protection channel label of the ring network where the ring node is located pushes the ring channel logic layer of the message carrying the service.
  • Step S203 The service is transmitted to the exit node through the working channel or the protection channel of the ring network where the ring-out node is located;
  • this step is used to transmit the service to the outgoing ring node and the above-mentioned ringing node through the working channel or protection channel of the ring network where the ringing node is located.
  • the transmission mode of the services in the ring network is similar, that is, there may be different situations: First, the ring network topology of the ring network where the ring-out node is located is normal.
  • the service is directly transmitted to the egress node by reading the working channel of the ring network;
  • the second is that the ring network topology of the ring network where the ring-out node is located is in a preset state. If the default state is that the node or node link of the ring network where the ring-out node is located fails, the switch needs to be switched to the ring network.
  • the protection channel transmits the service to the egress node through the protection channel. If the default state is that the node or node link of the ring network where the egress node is located disappears, the protection channel is switched back to the working channel.
  • the working channel transmits the traffic to the outgoing node.
  • the switching mode in the former case is the Steering protection mode of the ring network
  • the switching mode in the latter case is the ring network mode. Wrapping protection.
  • the foregoing step S201 is a preparatory work that needs to be performed before the service protection transmission protection step, and may be configured once before performing multiple service transmissions, and the subsequent services may implement service protection transmission based on the read configuration, or may transmit one for each service.
  • the business is configured separately.
  • the solution of the present application may include only the contents of the two steps S202 and S203, that is, when the service is transmitted to the interconnection node through the working channel or the protection channel of the ring network where the ring node is located, if Determining, according to the intersecting ring top state information, the outgoing node of the service that is reachable from the interconnected node, the interconnecting node pre-shares the service according to the information of the outgoing ring node to the ring network where the outgoing ring node is located The ringing node information, the ring network where the ringing node is located and the ring network where the ringing node is located pre-shared the ring topology state information; the service is transmitted to the outbound node through the working channel or the protection channel of the ring network where the ringing node is located.
  • the embodiment of the present application can achieve at least the following technical effects:
  • the ring node information is shared between the interconnect nodes in this embodiment, the information about the ring node can be easily implemented across the ring, thereby making the adjacent interconnect node actually become a "virtual node", that is, under control
  • the control plane is configured for one node (ie, the virtual node), and each interconnected node of the bottom layer can be configured accordingly, thereby reducing configuration traffic. It is beneficial to improve the transmission protection efficiency of the intersecting ring service;
  • the embodiment of the present application allows the ring network where the ring-in node is located and the ring network where the ring-out node is located to share the network topology state of the entire intersecting ring, so that the reachability of the self-exit ring node of the interconnected node can be entered.
  • the judgment is made at the ring node, and the judgment can be made at the faulty node or the previous node of the faulty link, and the respective advantages of the ringer Steering protection mode and the Wrapping protection mode are integrated, and the flexibility of the service transmission protection is improved.
  • the figure shows the traffic transmission process under normal conditions of the intersecting ring.
  • the figure includes two ring networks Ring ID1 (EDHGFE) and Ring ID2 (ABCDEA), where node E and node D are the interconnection nodes of the two ring networks, and each ring network is provided with two-way (clockwise and counterclockwise) The working channel and protection channel of the policy).
  • the figure shows two service lines for data to be transmitted, namely the uplink service line AEDH and the downlink service line HDEA.
  • the interconnection node Under normal circumstances, when the uplink service is transmitted to the interconnection node E through Ring ID2, the interconnection node performs the service reachability judgment, that is, whether the interconnection node E can reach the exit node H after the E node crosses the ring, due to the normal situation.
  • the interconnecting node E is reachable to the node H.
  • the interconnecting node E uses the outbound ring node information to perform the cross-ring operation to switch the uplink service transmission to the Ring lD1, and then delivers the uplink service to the outgoing ring node 11 through the working channel of the ring. .
  • the downlink service implements the service transmission in a similar manner: from the node H of the Rmg ID 1 to the ring, after the cross-ring operation of the interconnection node D reaches the Rmg ID2, and then reaches the outgoing link through the working channel of the Ring ID2, *, A.
  • FIG. 3(b) shows the traffic transmission process when one of the two interconnected nodes (Node E) fails.
  • the traffic on the intersecting ring performs service transmission protection across the ring through the interconnected node D that has not failed.
  • the interconnection node E fails, the uplink service is switched from the working channel to the protection channel at the node A of the Ring ID2, and the service data is sent to the node D through the nodes B and C, due to the interconnection node E (the service book can be used here)
  • the passing interconnected node is called the primary interconnecting node, and the other interconnecting nodes are the standby interconnecting nodes.
  • the fault is unreachable.
  • the interconnected node D node acts as the standby interconnecting node to determine the reachability of the node H. After determining that the node H can be reached, The interconnection node D switches the uplink service to RinglDL. Note that: After switching to Ring ID1, the service transmission will be reversed to the counterclockwise direction of RmglDl due to the failure of the working channel of Ring ID1 in the clockwise direction (the fault caused by the interconnection node E). When the transmission is transmitted on the protection channel and transmitted to the node F, it is switched back to the working channel in the clockwise direction to send the service data to the exit node H. For the same reason, the downlink service is handled in a similar manner. To avoid duplication, it is not repeated here.
  • the reachability judgment is performed, that is, whether the self-connected node E can reach the exit node H, because the fault occurs in the Ring ID2, the Ring ID1 is not affected, the exit point H node is reachable, and the interconnect node E performs the cross-ring operation.
  • Cross-ring operation to Rmg ID2 due to the working channel failure of Ring ID2 in the counterclockwise direction, the service switched to Rmg ID2 will be switched to the clockwise protection channel, and the node 0, C, B will reach the exit node A point.
  • the failure scenario See Figure 3(d), which shows the interconnected node link (the ED link between the interconnected node E and the interconnected node D) and the non-interconnected node.
  • the service transmission process when the link (the EA link between the interconnection node E and the node A) is faulty.
  • the primary interconnect node performs the reachability judgment to determine whether the interconnected node crosses the ring. If it is reachable, the primary interconnected node crosses the opposite ring; if it is unreachable, it continues to transmit the service data to the working channel. Prepare the interconnected nodes, and make a similar judgment after the cross-loop.
  • FIG. 4 there is shown a block diagram of an embodiment of a transmission protection apparatus for a service based on a multi-ring network intersecting ring of the present application.
  • the device embodiment includes: a shared information configuration unit 401, a first service transmission unit 402, a reachability determination unit 403, a cross-loop operation unit 404, and a second service transmission unit 405, where:
  • a shared information configuration unit 401 configured to configure an interconnecting node of the intersecting ring of the multi-ring structure network Information about the outgoing node of the shared service between the neighboring interconnected nodes, and the state information of the ring topology of the ring network where the ringing node is located and the ring network where the ringing node is located;
  • the first service transmission unit 402 is configured to transmit the service to the interconnection node by using a working channel or a protection channel of the ring network where the ring node is located;
  • the reachability determining unit 403 is configured to determine, according to the intersecting ring topology state information, whether the service self-connected node is reachable to the service ringing node;
  • the cross-loop operation unit 404 is configured to: when the service is transmitted to the interconnection node through the working channel or the protection channel of the ring network where the ring-in node is located, if the reachability determination unit determines, according to the intersecting ring topology state information, the service is available from the interconnected node.
  • the interconnected node crosses the ring to the ring network where the ring node is located according to the information of the outgoing ring node;
  • the second service transmission unit 405 is configured to transmit the service to the egress node through the working channel or the protection channel of the ring network where the ring-out node is located.
  • the working process of the embodiment of the device is: the shared information configuration unit 401 shares the ring node information between the adjacent interconnect nodes by configuring the interconnected nodes of the intersecting ring of the multi-ring structure network, and the ring network where the ring-in node and the ring-out node are located After the intersecting ring topology state information is shared, when the first service transmission unit 402 transmits the service to the interconnection node through the working channel or the protection channel of the ring network where the ring node is located, if the reachability determination unit 403 is based on the intersecting ring topology state The information judged service can reach the egress node from the interconnected node, and the trigger cross-loop operation unit 404 uses the egress node information to cross the ring to the ring network where the egress node is located, and then the second service transmission unit 405 passes the egress link.
  • the working channel or protection channel of the ring where the point is located transmits the service to the outgoing node.
  • the shared information configuration unit of the embodiment of the device may be configured once before the service transmission protection work is performed, and the subsequent service transmission process is implemented based on the configuration, and may be separately configured for each service transmission. That is to say, in the former case, for the transmission protection of some services, only the first service transmission unit 402, the reachability determination unit 403, the cross-loop operation unit 404, and the second of the apparatus embodiment are required.
  • the device of the service transmission unit 405 can achieve the purpose of the invention.
  • the first service transmission unit 402 is configured to transmit the service through the working channel or the protection channel of the ring network where the ring-entry node is located.
  • the interconnecting node shares the outgoing node information of the service in advance;
  • the reachability determining unit 403 is configured to determine, according to the intersecting ring topology state information, whether the service self-connected node can reach the outgoing ring node; 404, used to ring the ring where the service passes through the ring node
  • the reachability determining unit judges that the service can reach the ringing node from the interconnecting node according to the intersecting ring topology state information, the read interconnecting node crosses the ring according to the information of the outgoing ring node.
  • the ring network where the ring-out node is located, the ring network where the ring-in node is located and the ring network where the ring-out node is located pre-shared with the ring topology state information;
  • the second service transmission unit 405 is configured to use the working channel of the ring network where the ring-out node is located Or the protection channel transmits traffic to the outgoing node.
  • the neighboring node is configured to share the information of the ring node between the interconnected nodes and the topology information of the intersecting ring shared between the ring node and the ring network where the ring node is located, when the service is transmitted to the interconnect node,
  • the interconnecting node can reach the egress node, and the interconnecting node uses the information of the egress ring node to transmit to the ring network where the egress ring node is located.
  • the neighboring interconnection node can be regarded as a virtual node, and the interconnection node that the service determined by the service configuration should pass through fails.
  • another interconnecting node may implement a cross-ring according to the information of the outgoing ring node, and the cross-ring mode does not need to be associated with the global of the two single ring networks of the intersecting ring, so that the two ring networks are logically independent, thereby It reduces the transmission protection complexity of intersecting ring-based services and conforms to the basic idea of MPLS.
  • the cross-loop operating unit in the above device embodiment has different internal structures depending on the different cross-ring implementations.
  • the cross-loop operation unit 404 may include a label stripping sub-unit 4041 and a label-pushing sub-unit 4042, where: the label stripping unit 4041 is configured to carry the service channel or the protection channel of the ring network where the ring-in node is located carrying the message carrying the service. The label is stripped from the message; the label is pushed into the sub-unit 4042, and is used to push the working channel or the protection channel label of the ring network where the ring-out node is located into the message carrying the service.
  • the label stripping sub-unit 4041 is specifically configured to use the working channel or the protection channel of the ring network where the ring-in node that carries the service carries the ring network.
  • the label is stripped from the ring channel logical layer of the message carrying the service, and the label push-in sub-unit 4042 is specifically configured to push the working channel or the protection channel label of the ring network where the ring-out node is located into the ring channel logic layer of the message carrying the service.
  • the first service transmission unit 402 may include a first state determination subunit.
  • the first state determining sub-unit 4021 is configured to determine whether the ring network topology state of the ring network where the ring-entry node is located is a preset state, and if yes, switch to the ring-in node.
  • the working channel or the protection channel of the ring network is configured to transmit the service to the interconnection node by using the switched working channel or the protection channel.
  • the second service transmission unit 405 may also have the above-mentioned similar structure, that is, may include the second state determination sub-unit 4051 and the second service transmission sub-unit 4052, where: the second state determination sub-unit 4051 is configured to Determining whether the ring topology of the ring network where the ring node is located is a preset state, if yes, switching to the working channel or protection channel of the ring network where the ring node is located; the second service transmission subunit 4052 is used for switching The subsequent working channel or protection channel transmits the traffic to the outgoing node.
  • the shared information configuration unit 401 of the above device embodiment may have different structures for implementing sharing functions for different shared information.
  • the shared information configuration unit 401 may include the outgoing loop node information sharing subunit 4011 and the ring network topology state sharing subunit 4012, and the former is used for the outbound node of the service of one interconnected node that is configured to pass through the adjacent interconnected node.
  • the information is sent to another interconnected node in real time or periodically to achieve sharing between the outbound node information; the latter is used when the state of the node or node link of the ring network where the incoming ring node of the multi-ring structure network is located changes And changing the state change of the node or the node link to the other node of the ring network where the ring-in node is located, and changing the state of the node to the node that is far from the state change; receiving the state change at the interconnecting node of the ring network where the ring-in node is located After the notification, the state change is notified to each node of the ring network where the ring-out node is located, so that the ring network where the ring-out node is located shares the information of the network extension of the ring network where the ring-in node is located.
  • the ring network topology sharing sub-unit 4012 can also be used in the ring-out node of the multi-ring structure network.
  • the state change of the read node or the node link is notified to the other nodes of the ring network where the ring-out node is located, and the node is in the direction of the node link away from the state change;
  • the interconnection node of the ring network where the ring node is located notifies the status change to each node of the ring network where the ring entry node is located.
  • the message transmission between nodes in the foregoing sharing process can be performed by using the APS protocol.
  • each unit may be implemented in the same software or software and/or hardware when implementing the present application.
  • all the functional units can be formed into a whole device for controlling the service transmission protection in the entire intersecting ring, and all the functional units can be distributed to the ring network nodes of the intersecting rings, and the respective functional units of the nodes cooperate with each other.
  • the overall functionality of the device embodiment is implemented.
  • This application can be used in a variety of general purpose or special purpose computing system environments or configurations.
  • personal computer server computer, handheld or portable device, tablet device, multiprocessor system, microprocessor based system, set-top box, programmable consumer electronics device, network PC, small computer, mainframe computer, A distributed computing environment, including any of the above systems or devices.
  • the application can be described in the general context of computer-executable instructions executed by a computer, such as a program module.
  • program modules include routines, programs, objects, components, data structures, and the like that perform particular tasks or implement particular abstract data types.
  • the present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices that are connected through a communication network.
  • program modules can be located in both local and remote computer storage media including storage devices.

Abstract

本申请实施例公开了一种基于多环结构网络相交环的业务的传输保护方法。该方法包括：当通过入环环网的工作通道或保护通道将业务传输到互联节点时，如果根据相交环拓扑状态信息判断出业务自该互联节点可达业务的出环节点，则在该互联节点根据出环节点信息跨环，所述互联节点预先共享业务的出环节点信息，所述入环节点所在环网与出环节点所在环网预先共享相交环拓扑状态信息；通过出环环网的工作通道或保护通道将业务传输到出环节点。本申请实施例还公开了一种基于多环结构网络相交环的业务的传输保护装置。本申请实施例可以避免通过上下环路关联环网全局的方式实现业务传输保护，减少相交环跨环保护的复杂度。

Description

基于多环结构网络相交环的业务的传输保护方法及装置 本申请要求于 2012年 11 月 16 日提交中国国家知识产 i、 申请号为 201210466778.2、 发明名称为 "基于多环结构网各相交环的业务的传输保护方 法及装置"的中国专利申请的优先权，该在先申请的全部内容通过引用结合在 本申请中。
技术领域 本申请涉及通信网络技术领域，特别是涉及一种基于多环结构网珞相交环 的业务的传输保护方法及其对应的装置。
背景技术
多环结构网絡由至少两个单环网组成，这种网络架构是通信技术领域常用 的一种网絡拓朴结构。相对于其他网络拓朴结构， 多环结构网络能够较大程度 地提高网絡生存性（Survivability, 指网络设备节点或节点链路发生故障时， 网络在极短时间内自愈以维持某种可容忍的服务水平的能力）。 由于多环网络 结构包含多个单环网， 两个环网之间主要存在相离和相交两种关系， 两个环网 相交时通过共用链路形成相交环， 两个环网上相交的节点为互联节点。
在多换结构网絡相交环的环境下， 一种实现业务传输保护的方式如图 1 所示。 图中的网絡业务 Q由节点 2入环网 1、 节点 8出环网 2, 业务 Q的工作 通道为 2-1-5-4-8，经过互联节点 5和 4。对于 Q业务的保护通道在环网 1上为 路径 M (由 M1~M5组成）， 在环网 2上为路径 N (由 N1 N5组成）。 当互联 节点 5出现故障等非正常状态时， 传送到节点 1的 Q业务或者在节点 2的 Q 业务切换到保护路径 M上反向发送至节点 4， 节点 4根据预先建立的业务 Q 与 M、 N的关联关系把 Q业务切换到环 2上继续传送到目的节点 8。
上述业务传输保护方式在实现由环网 1到环网 2的跨环操作时，需要根据 上下环路间预先建立的两奈或多条路径的关联进行，由于这些路径涉及到两个 环网全局， 使两个相邻环网逻辑上不独立， 增加了相交环跨环保护的复杂度， 不符合 MPLS的基本思想。此外，上述业务传输保护方式仅能解决互联节点的 故障问题，不能解决包含互联节点故障在内的多节点或节点链路出现非正常状 态时的业务传输保护。 发明内容
为解决上述技术问题，本申请实施例提供了一种基于多环网结构网絡相交 环的业务的传输保护方法及其相应装置，以避免通过关联上下环网全局的方式 实现业务传输保护， 减少相交环跨环保护的复杂度。
本申请实施例提供的基于多环结构网络相交环的业务的传输保护方法包 括：
当通过业务的入环节点所在环网的工作通道或保护通道将业务传输到互 联节点时，如果根据相交环拓朴状态信息判断出业务自该互联节点可达业务的 出环节点， 则在该互联节点根据出环节点信息跨环到出环节点所在环网， 所述 互联节点预先共享业务的出环节点信息，所述入环节点所在环网与出环节点所 在环网预先共享相交环拓朴状态信息；
通过出环节点所在环网的工作通道或保护通道将业务传输到出环节点。 优选地，所述在该互联节点根据出环节点信息跨环到出环节点所在环网包 括：
将承载业务的消息携带的入环节点所在环网的工作通道或保护通道标签 从消息中剥离，将出环节点所在环网的工作通道或保护通道标签推入承载业务 的消息。
进一步优选地， 环网工作通道或保护通道包括环通道逻辑层， 所述将承载 业务的消息携带的入环节点所在环网的工作通道或保护通道标签从消息中剥 离，将出环节点所在环网的工作通道或保护通道标签推入承载业务的消息具体 包括：
将承载业务的消息携带的入环节点所在环网的工作通道或保护通道标签 从承载业务的消息的环通道逻辑层剥离，将出环节点所在环网的工作通道或保 护通道标签推入承载业务的消息的环通道逻辑层。
优选地，所述通过业务的入环节点所在环网的工作通道或保护通道将业务 传输到互联节点具体包括：
当入环节点所在环网的环网拓朴状态为预设状态时，倒换到入环节点所在 环网的工作通道或保护通道，通过倒换后的工作通道或保护通道将业务传输到 互联节点； 和 /或， 所述通过出环节点所在环网的工作通道或保护通道将业务传输到出环节 点具体包括：
当出环节点所在环网的环网拓朴状态为预设状态时，倒换到出环节点所在 环网的工作通道或保护通道，通过倒换后的工作通道或保护通道将业务传输到 出环节点。
优选地， 所述所述互联节点预先共享业务的出环节点信息， 所述入环节点 所在环网与出环节点所在环网预先共享相交环拓朴状态信息包括：
相邻互联节点的一个互联节点将配置经过自身的业务的出环节点信息实 时或周期性地发送给另一个互联节点以实现业务的出环节点信息的共享； 当入环节点所在环网的节点或节点链路的状态改变时，将该节点或节点链 路的状态改变朝远离状态改变的节点链路方向逐节点通知到所述入环节点所 在环网的其他节点；入环节点所在环网的互联节点接收到状态改变通知后将状 态改变通知到出环节点所在环网的各节点以实现入环节点所在环网的拓朴状 态信息的共享；
当出环节点所在环网的节点或节点链路的状态改变时，将读节点或节点链 路的状态改变朝远离状态改变的节点链路方向逐节点通知到所述出环节点所 在环网的其他节点；出环节点所在环网的互联节点接收到状态改变通知后将状 态改变通知到入环节点所在环网的各节点以实现出环节点所在环网的拓朴状 态信息的共享。
优选地，根据相交环拓朴状态信息判断业务自互联节点是否可达业务的出 环节点具体为：
在入环节点处或互联节点处根据相交环拓朴状态信息判断业务自互联节 点是否可达业务的出环节点。
本申请实施例还提供了一种基于多环结构网絡相交环的业务的传输保护 装置。 该装置包括： 第一业务传输单元、 可达性判断单元、 跨环操作单元和第 二业务传输单元， 其中：
所述第一业务传输单元，用于通过业务的入环节点所在环网的工作通道或 保护通道将业务传输到互联节点， 所述互联节点预先共享业务的出环节点信 ij . 所述可达性判断单元，用于根据相交环拓朴状态信息判断业务自互联节点 是否可达业务的出环节点；
所述跨环操作单元，用于在通过业务的入环节点所在环网的工作通道或保 护通道将业务传输到互联节点时，如果可达性判断单元根据相交环拓朴状态信 息判断出业务自该互联节点可达业务的出环节点，则在该互联节点根据出环节 点信息跨环到出环节点所在环网，所述入环节点所在环网与出环节点所在环网 预先共享相交环拓朴状态信息；
所述第二业务传输单元，用于通过出环节点所在环网的工作通道或保护通 道将业务传输到出环节点。
优选地，所述跨环操作单元包括标签剥离子单元和标签推入子单元，其中： 所述标签剥离子单元，用于将承载业务的消息携带的入环节点所在环网的 工作通道或保护通道标签从消息中剥离；
所述标签推入子单元，用于将出环节点所在环网的工作通道或保护通道标 签推入承载业务的消息。
进一步优选地， 所述业务工作通道或保护通道包括环通道逻辑层， 所述标 签剥离子单元具体用于将承载业务的消息携带的入环节点所在环网的工作通 道或保护通道标签从承载业务的消息的环通道逻辑层剥离，所述标签推入子单 元具体用于将出环节点所在环网的工作通道或保护通道标签推入承载业务的 消息的环通道逻辑层。
优选地，所述第一业务传输单元包括第一状态判断子单元和第一业务传输 子单元， 其中： 所述第一状态判断子单元， 用于判断入环节点所在环网的环网 拓朴状态是否为预设状态，如果是， 则倒换到入环节点所在环网的工作通道或 保护通道； 所述第一业务传输子单元， 用于通过倒换后的工作通道或保护通道 将业务传输到互联节点； 和 /或，
所述第二业务传输单元包括第二状态判断子单元和第二业务传输子单元， 其中： 所述第二状态判断子单元， 用于判断出环节点所在环网的环网拓朴状态 是否为预设状态，如果是，则倒换到出环节点所在环网的工作通道或保护通道； 所述第二业务传输子单元，用于通过倒换后的工作通道或保护通道将业务传输 到出环节点。 优选地， 所述装置包括共享信息配置单元， 用于配置多环结构网各相交环 的互联节点，使相邻互联节点间共享业务的出环节点信息， 以及使入环节点所 在环网与出环节点所在环网共享相交环拓朴状态信息，该共享信息配置单元具 体包括出环节点信息共享子单元和环网拓朴状态共享子单元， 其中：
所述出环节点信息共享子单元，用于将配置经过相邻互联节点的一个互联 节点的业务的出环节点信息实时或周期性地发送给另一个互联节点；
所述环网拓朴状态共享子单元，用于在入环节点所在环网的节点或节点链 路的状态改变时，将该节点或节点链路的状态改变朝远离状态改变的节点链路 方向逐节点通知到所述入环节点所在环网的其他节点；在入环节点所在环网的 互联节点接收到状态改变通知后，将状态改变通知到出环节点所在环网的各节 点；
所述环网拓朴状态共享子单元，还用于在出环节点所在环网的节点或节点 链路的状态改变时，将该节点或节点链路的状态改变朝远离状态改变的节点链 路方向逐节点通知到所述出环节点所在环网的其他节点；在出环节点所在环网 的互联节点接收到状态改变通知后，将状态改变通知到入环节点所在环网的各 节点。
优选地，所述可达性判断单元具体用于在入环节点处或互联节点处根据相 交环拓朴状态信息判断业务自互联节点是否可达业务的出环节点。
本申请实施例的互联节点间共享出环节点信息以及入环节点和出环节点 所在环网间共享相交环拓朴状态信息， 当业务传输到互联节点时， 如果该互联 节点可达出环节点，则在读互联节点利用出环节点信息跨环到出环节点所在环 网传输。与现有技术相比，由于本申请实施例在互联节点间共享出环节点信息， 相邻互联节点可被视为一个虛拟节点，在通过业务配置确定的业务本该经过的 互联节点出现故障等非正常状态时，另外的互联节点可根据该出环节点信息实 现跨环,这种跨环方式无需关联到相交环的两个单环网的全局，使两个环网逻 辑上各自独立， 从而降低了基于相交环的业务的传输保护复杂度， 符合 MPLS 的基本思想。
附图说明 为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面描述 中的附图仅仅是本申请中记载的一些实施例， 对于本领域普通技术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为现有技术在多环结构网络相交环环境下的业务传输保护示意图； 图 2为基于多环网络相交环的业务的传输保护方法实施例的流程图； 图 3 ( a ) 为本申请在相交环正常情况下的业务传输过程示意图； 图 3 ( b ) 为本申请在互联节点故障情形下的业务传输过程示意图； 图 3 ( c ) 为本申请在非互联节点链路故障情形下的业务传输示意图； 图 3 ( d ) 为本申请在互联节点链路和非互联节点链路均故障情形下的业 务传输过程示意图；
图 4 为本申请的基于多环网珞相交环的业务的传输保护装置实施例的结 构框图。
具体实施方式 为了使本技术领域的人员更好地理解本申请中的技术方案，下面将结合本 申请实施例中的附图， 对本申请实施例中的技术方案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本申请一部分实施例， 而不是全部的实施例。 基 于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获 得的所有其他实施例， 都应当属于本申请保护的范围。
参见图 2， 该图示出了本申请的基于多环网珞相交环的业务的传输保护方 法实施例的流程。 该实施例包括：
步骤 S201 : 配置多环结构网络相交环的互联节点， 使相邻互联节点间共 享业务的出环节点信息，以及使入环节点所在环网与出环节点所在环网共享相 交环拓朴状态信息；
本实施例的 "基于多环多环网各相交环的业务"指在多环网絡的一个环网 内的任何一个节点入环，而在多环网絡的另一个相邻环网内的任^■一个节点出 环的业务。基于此，对于单个环网而言，根据传输业务过程中发挥作用的不同， 环网上的节点可划分为三类： 一类是接入业务的入环节点，一类是传输业务的 中间环节点， 第三类是输出业务的出环节点。这三类节点在传输单个网絡业务 过程中各自发挥自身的作用， 但是， 就环网整体而言， 环网上的任何一个节点 均可能同时具有三类节点的功能。
多环结构网絡包括多个单环网，相邻环网相交后的交点通常为两个， 也可 以为多个， 这些交点为互联节点， 互联节点通过共用链路， 使其既属于一个环 网上的节点， 也属于另一个环网上的节点。 但是， 这些互联节点在两个环网上 的工作情况并不当然共享， 当他们各在一个环上工作时， 具有独立性。 为了使 互联节点在两个环网中均 "可见"， 需要对其进行配置， 配置的目的是使两个 相邻互联节点共享出环节点信息，以及通过互联节点使相交环的两个环网能够 共享整个相交环的拓 4卜状态信息。
对于相邻互联节点间共享出环节点信息以及入环节点和出环节点所在网 絡共享相交环拓朴状态信息的配置手段本实施例不作特别限定，可以采用手工 配置， 也可以借助于自动化设备按照预设规则进行配置， 比如采用网管软件。 对于相邻互联节点间共享出环节点信息的具体配置方式也不作限定，但在实际 应用过程中，本申请优选如下方式完成共享出环节点的信息配置： 相邻互联节 点的一个互联节点将配置经过自身的业务的出环节点信息实时或周期性地发 送给另一个互联节点，从而使得相邻互联节点间可以相互知道各自业务的出环 节点信息。 此外， 还可以配置相邻互联节点间出环节点信息的交互时间机制， 比如可以实时进行或者周期性进行。 同样地，对于通过配置互联节点使入环节 点和出环节点所在环网共享相交环拓朴状态信息的具体配置方式也不作限定， 但在实际应用过程中， 本申请优选如下方式完成配置：
当多环结构网絡的入环节点所在环网的节点或节点链路的状态改变时，将 该节点或节点链路的状态改变朝远离状态改变的节点链路方向逐节点通知到 所述入环节点所在环网的其他节点；入环节点所在环网的互联节点接收到状态 改变通知后将状态改变通知到出环节点所在环网的各节点；
当多环结构网络的出环节点所在环网的节点或节点链路的状态改变时，将 该节点或节点链路的状态改变朝远离状态改变的节点链路方向逐节点通知到 所述出环节点所在环网的其他节点；出环节点所在环网的互联节点接收到状态 改变通知后将状态改变通知到入环节点所在环网的各节点。
上述配置过程基于互联节点既处于入环节点所在环网内，也处于出环节点 内， 通过互联节点的 "双重身份"将在入环节点所在环网内获知的该环网的拓 朴状态信息通知到出环节点所在环网内的各节点，将在出环节点所在环网内获 知的该环网的拓朴状态信息通知到出环节点所在环网内的各节点，这样， 两个 单环网的每个节点均可掌握整个相交环的网絡拓朴状态。在实现上述拓朴状态 消息的相互通知过程中，可以采用各种消息传输协议进行消息传输， 比如采用 APS协议等。
步骤 S202: 当通过入环节点所在环网的工作通道或保护通道将业务传输 到互联节点时，如果根据相交环拓朴状态信息判断出业务自该互联节点可达出 环节点， 则在该互联节点根据出环节点信息跨环到出环节点所在环网；
当业务从一个环网的入环节点进入环网后，本步骤通过入环节点所在环网 的工作通道或保护通道将业务传输到互联节点可能存在不同的情况：一是入环 节点所在环网的环网拓朴状态正常，这时通过该环网的工作通道直接将业务传 输到互联节点； 二是入环节点所在环网的环网拓朴状态出现预设状态，如果预 设状态表现为入环节点所在环网的节点或节点链路发生故障，这时则需要倒换 到该环网的保护通道，通过保护通道将业务传输到互联节点； 如果预设状态表 现为入环节点所在环网的节点或节点链路故障消失状态，这时则会由保护通道 倒换回工作通道， 通过工作通道将业务传输到互联节点。 还值得说明的是： 在 预设状态或非预设状态之间进行工作通道与保护通道之间的倒换可以在业务 的入环节点处， 也可以在业务传输过程中的某个故障节点的前一个节点处，前 者情形下的倒换方式为环网的 Steering保护方式，后者情形下的倒换方式为环 网的 Wrapping保护方式。
当通过入环节点所在环网的工作通道或保护通道将业务传输到互联节点 时，根据基于相交环拓朴状态信息判断的业务自该互联节点是否可达出环节点 的结果决定是否在读互联节点处实现跨环，即从入环节点所在的环网切换到出 环节点所在环网。由于入环节点所在环网与出环节点所在环网之间共享相交环 拓朴状态信息，这种基于相交环拓朴状态信息进行业务自互联节点是否可达出 环节点的判断可在入环节点处进行（类似于前述的 Steering保护方式）， 也可 以在业务传输到互联节点时， 在该互联节点处进行（类似于前述的 Wrapping 保护方式）。 值得说明的是： 在前一种情形下（入环节点处判断可达性）， 本步 骤的业务传输到的 "互联节点"是业务传输到的直接互联节点， 在后一种情形 下 （在互联节点处判断可达性）， 本步骤的业务传输到的 "互联节点" 是最后 具有可达性的互联节点，读互联节点接收到的业务可能是在其他互联节点处经 过判断不可达时转送到本互联节点的业务。
当获知业务传输到的互联节点具有可达性（即自该互联节点可达业务的出 环节点）时， 在该互联节点处实现跨环。 对于 "跨环" 的方式， 本实施例通过 利用出环节点信息进行跨环操作， 具体可以按照如下方式实现： 将承载业务的 消息携带的入环节点所在环网的工作通道或保护通道标签从消息中剥离，将出 环节点所在环网的工作通道或保护通道标签推入承载业务的消息。当在某些多 环结构网絡中， 业务通道可能包含多个逻辑层， 比如 PW层、 业务层和环通道 逻辑层等， 这种情况下， 上述跨环操作主要在环通道逻辑层进行， 而对更为内 层的其他层上不进行跨环， 即： 将承载业务的消息携带的入环节点所在环网的 工作通道或保护通道标签从承载业务的消息的环通道逻辑层剥离，将出环节点 所在环网的工作通道或保护通道标签推入承载业务的消息的环通道逻辑层。
步骤 S203: 通过出环节点所在环网的工作通道或保护通道将业务传输到 出环节点；
当业务从一个环网的互联节点下环，跨环到出环节点所在环网后， 本步骤 通过出环节点所在环网的工作通道或保护通道将业务传输到出环节点与上述 入环节点环网内业务的传输方式相似， 即可能存在不同的情况： 一是出环节点 所在环网的环网拓朴状态正常，这时通过读环网的工作通道直接将业务传输到 出环节点； 二是出环节点所在环网的环网拓朴状态出现预设状态， 如果预设状 态表现为出环节点所在环网的节点或节点链路发生故障，这时则需要倒换到该 环网的保护通道，通过保护通道将业务传输到出环节点； 如果预设状态表现为 出环节点所在环网的节点或节点链路故障消失状态，这时则会由保护通道倒换 回工作通道， 通过工作通道将业务传输到出环节点。 同样地， 在预设状态或非 在业务传输过程中的某个故障节点的前一个节点处，前者情形下的倒换方式为 环网的 Steering保护方式， 后者情形下的倒换方式为环网的 Wrapping保护方 式。
通过本实施例的前述步骤实现本申请的发明目的过程中， 还值得说明的 是： 上述步骤 S201是在业务保护传输保护步骤之前需要进行的准备性质的工 作，可以在进行多个业务传输前一次性配置完毕， 以后的业务基于读配置实现 业务保护传输， 也可以每传输一个业务进行单独配置。 在前一种情况下， 本申 请的方案可以仅包括后续的 S202、 S203两个步骤的内容， 即： 当通过入环节 点所在环网的工作通道或保护通道将业务传输到互联节点时，如果根据相交环 拓朴状态信息判断出业务自该互联节点可达业务的出环节点，则在该互联节点 根据出环节点信息跨环到出环节点所在环网，所述互联节点预先共享业务的出 环节点信息，所述入环节点所在环网与出环节点所在环网预先共享相交环拓朴 状态信息；通过出环节点所在环网的工作通道或保护通道将业务传输到出环节 点。
本实施例通过配置相邻的互联节点，使互联节点间共享出环节点信息以及 入环节点和出环节点所在环网间共享相交环拓朴状态信息，当业务传输到互联 节点时，如果该互联节点可达出环节点， 则在该互联节点利用出环节点信息跨 环到出环节点所在环网传输。 与现有技术相比， 本申请实施例至少可以取得如 下技术效果：
( 1 ) 由于本实施例在互联节点间共享出环节点信息， 即使互联节点存在 故障等非正常状态，跨换操作也可以通过其他互联节点实现， 而无需关联到相 交环的每个单环网的全局，使两个相邻环网逻辑上独立，减少了相交环业务保 护的复杂度， 更加符合 MPLS的基本思想；
( 2 ) 由于本实施例的互联节点间共享出环节点信息， 具有出环节点信息 即可方便地实现跨环， 由此使相邻互联节点实际上成为了一个 "虛拟节点"， 即在控制平面， 多个互联节点对于配置操作而言不可见，在控制平面针对一个 节点（即该虛拟节点）进行配置，底层的每个互联节点的即可实现相应的配置， 从而减少了配置业务量， 有利于提高相交环业务的传输保护效率；
( 3 ) 由于本申请实施例通过互联节点使入环节点所在环网与出环节点所 在环网共享整个相交环的网络拓朴状态，使得互联节点自出环节点的可达性即 可在入环节点处进行判断，也可在故障节点或故障链路的前一个节点处进行判 断， 综合了环网 Steering保护方式和 Wrapping保护方式的各自优点， 提高了 业务传输保护的灵活性。 为更进一步阐释上述实施例的技术方案， 下面以一个详细的实例进行说 明。 参见图 3 ( a )， 该图示出了相交环正常情况下的业务传输过程。 该图包括 两个环网 Ring ID1 ( EDHGFE )和 Ring ID2 ( ABCDEA )， 其中节点 E和节点 D是这两个环网的互联节点，每个环网内设置有双向（顺时针方向和逆时针方 针的工作通道和保护通道）。 该图示出了两条待传输数据的业务线， 即上行业 务线 AEDH和下行业务线 HDEA。 在正常情况下， 当上行业务通过 Ring ID2 传输到互联节点 E时， 互联节点进行业务可达性判断， 即判断在 E节点跨环 后由互联节点 E是否可达出环节点 H, 由于正常情况下，互联节点 E到节点 H 的可达， 互联节点 E 利用出环节点信息进行跨环操作将上行业务传输切换至 Ring lDl上， 然后通过该环的工作通道将上行业务送达出环节点11。 同理， 下 行业务按照类似方式实现业务传输： 从 Rmg ID 1的节点 H入环， 通过互联节 点 D的跨环操作后到达 Rmg ID2, 然后通过 Ring ID2的工作通道到达出环节 ,*、 A。 下面分别描述几种代表性故障情形下的业务传输保护问题。
对于互联节点故障的情形： 参见图 3 ( b ), 该图示出了两个互联节点中的 一个互联节点（节点 E )故障时的业务传输过程。 在该情形下相交环上的业务 通过未出现故障的互联节点 D进行跨环实现业务传输保护。 在互联节点 E出 现故障时， 上行业务在 Ring ID2的节点 A由工作通道倒换到保护通道， 将业 务数据经节点 B、 C到送达互联节点 D点， 由于互联节点 E (这里可将业务本 该经过的互联节点称为主互联节点，其他互联节点为备互联节点）出现故障不 可达， 互联节点 D节点作为备互联节点进行到节点 H的可达性判断， 经判断 能够达到节点 H后， 互联节点 D将上行业务切换至 RinglDL 需要注意的是： 当切换到 Ring ID1后， 由于 Ring ID1顺时针方向的工作通道出现故障 （互联 节点 E导致的故障）， 业务传输将倒换到 RmglDl的逆时针保护通道上传输， 传输到节点 F时，再倒换回顺时针方向的工作通道，从而将业务数据送达到出 环节点 H。 同理， 对于下行业务按照类似方式处理， 为避免重复， 这里不再重 复。
对于非互联节点链路故障情形： 参见图 3 ( c ), 该图示出了非互联节点链 路（节点 E和节点 A间的 EA链路）故障时的业务传输过程。 在读情形下， 业务传输过程与单环网故障时相同， 即在故障链路所在的环网内进行保护倒 换。 节点 E和节点 A间的 EA链路故障情况下， 上行业务和下行业务传输过 程分别为： （ 1 )上行业务在 RingID2通过保护通道将业务数据传输到互联节点 E, 然后倒换回工作通道， 再进行可达性判断， 即判断自互联节点 E是否可达 出环节点 H, 由于故障发生在 Ring ID2， Ring ID1不受影响， 出环点 H节点 可达，互联节点 E进行跨环操作将业务切换到 Ring ID1 ,然后沿顺时针方向的 工作通道经节点？、 G到达节点 H下环； （2 )下行业务在 Ring lDl l通过工作 通道将业务数据传输到互联节点 E，由于 Rmg ID2上互联节点到业务下环点节 点 A可达， 在互联节点 E进行跨环操作到 Rmg ID2, 由于 Ring ID2逆时针方 向的工作通道故障， 切换到 Rmg ID2的业务将倒换到顺时针方向的保护通道， 经过节点0、 C, B到达出环节点 A点。
对于互联节点链路和非互联节点链路均故障情形： 参见图 3 ( d ), 该图示 出了互联节点链路（互联节点 E和互联节点 D之间的 ED链路）和非互联节 点链路（互联节点 E和节点 A之间的 EA链路 ) 均故障时的业务传输过程。 在读情形下， 主互联节点进行可达性判断， 确定是否在本互联节点跨环， 如果 可达， 则在主互联节点跨到对环； 如果不可达， 则继续通过工作通道将业务数 据传输到备互联节点， 进行类似判断后跨环。 在互联节点 E和互联节点 D之 间的 EA链路以及互联节点 E和节点 A之间的 EA链路同时故障情况下，下行 业务到达互联节点 E时， 判断节点 A不可达， 则在 Ring ID1继续将业务数据 送到备互联节点 D, 互联节点 D经判断后可跨环， 跨环后在 Ring ID2经过节 点0、 C、 B， 到节点 A下环。 以上内容是对本申请方法实施例的描述，相应地，本申请还提供了装置实 施例。 参见图 4， 该图示出了本申请基于多环网珞相交环的业务的传输保护装 置实施例的结构框图。 该装置实施例包括： 共享信息配置单元 401、 第一业务 传输单元 402、 可达性判断单元 403、 跨环操作单元 404和第二业务传输单元 405 , 其中：
共享信息配置单元 401 , 用于配置多环结构网珞相交环的互联节点， 使相 邻互联节点间共享业务的出环节点信息，以及使入环节点所在环网与出环节点 所在环网共享相交环拓朴状态信息；
第一业务传输单元 402， 用于通过入环节点所在环网的工作通道或保护通 道将业务传输到互联节点；
可达性判断单元 403， 用于根据相交环拓朴状态信息判断出业务自互联节 点是否可达业务的出环节点；
跨环操作单元 404, 用于在业务通过入环节点所在环网的工作通道或保护 通道传输到互联节点时，如果可达性判断单元根据相交环拓朴状态信息判断出 业务自该互联节点可达出环节点，则在该互联节点根据出环节点信息跨环到出 环节点所在环网；
第二业务传输单元 405, 用于通过出环节点所在环网的工作通道或保护通 道将业务传输到出环节点。
本装置实施例的工作过程是：共享信息配置单元 401在通过配置多环结构 网珞相交环的互联节点使相邻互联节点间共享出环节点信息以及使入环节点 与出环节点所在环网共享相交环拓朴状态信息后， 当第一业务传输单元 402 通过入环节点所在环网的工作通道或保护通道将业务传输到互联节点时，如果 可达性判断单元 403 基于相交环拓朴状态信息判断的业务自互联节点可达出 环节点，则触发跨环操作单元 404利用出环节点信息在该互联节点跨环到出环 节点所在环网，然后由第二业务传输单元 405通过出环节点所在环网的工作通 道或保护通道将业务传输到出环节点。 这里需要说明的是： 本装置实施例的共 享信息配置单元可以在业务传输保护工作进行之前一次性配置完毕，后续的业 务传输过程基于该配置实现，也可以在每进行一次业务传输单独进行配置。也 就是说， 在前一种情形下， 对于某些业务的传输保护而言， 仅需要本装置实施 例的第一业务传输单元 402、 可达性判断单元 403、 跨环操作单元 404和第二 业务传输单元 405组成的装置即可实现发明目的，该情形下，各个组成单元的 职能分配为： 第一业务传输单元 402， 用于通过入环节点所在环网的工作通道 或保护通道将业务传输到互联节点，所述互联节点预先共享业务的出环节点信 息； 可达性判断单元 403， 用于根据相交环拓朴状态信息判断出业务自互联节 点是否可达出环节点； 跨环操作单元 404， 用于在业务通过入环节点所在环网 的工作通道或保护通道传输到互联节点时，如果可达性判断单元根据相交环拓 朴状态信息判断出业务自该互联节点可达出环节点，则在读互联节点根据出环 节点信息跨环到出环节点所在环网，所述入环节点所在环网与出环节点所在环 网预先共享相交环拓朴状态信息； 第二业务传输单元 405， 用于通过出环节点 所在环网的工作通道或保护通道将业务传输到出环节点。
本装置实施例通过配置相邻的互联节点，使互联节点间共享出环节点信息 以及入环节点和出环节点所在环网间共享相交环拓朴状态信息，当业务传输到 互联节点时，如果该互联节点可达出环节点， 则在该互联节点利用出环节点信 息跨环到出环节点所在环网传输。 与现有技术相比， 由于本装置实施例在互联 节点间共享出环节点信息，相邻互联节点可被视为一个虛拟节点，在通过业务 配置确定的业务本该经过的互联节点出现故障等非正常状态时，另外的互联节 点可根据该出环节点信息实现跨环，这种跨环方式无需关联到相交环的两个单 环网的全局，使两个环网逻辑上各自独立，从而降低了基于相交环的业务的传 输保护复杂度， 符合 MPLS的基本思想。
上述装置实施例中的跨环操作单元依据不同的跨环实现方式其具有不同 的内部结构。 比如， 跨环操作单元 404可以包括标签剥离子单元 4041和标签 推入子单元 4042， 其中： 标签剥离单元 4041， 用于将承载业务的消息携带的 入环节点所在环网的工作通道或保护通道标签从消息中剥离；标签推入子单元 4042，用于将出环节点所在环网的工作通道或保护通道标签推入承载业务的消 息。 当在某些多环结构网絡中的业务工作通道或保护通道包括环通道逻辑层， 上述标签剥离子单元 4041具体用于将承载业务的消息携带的入环节点所在环 网的工作通道或保护通道标签从承载业务的消息的环通道逻辑层剥离，标签推 入子单元 4042具体用于将出环节点所在环网的工作通道或保护通道标签推入 承载业务的消息的环通道逻辑层。
基于上述类似道理，第一业务传输单元 402可以包括第一状态判断子单元
4021和第一业务传输子单元 4022, 其中： 第一状态判断子单元 4021 , 用于判 断入环节点所在环网的环网拓朴状态是否为预设状态，如果是， 则倒换到入环 节点所在环网的工作通道或保护通道； 第一业务传输子单元 4022, 用于通过 倒换后的工作通道或保护通道将业务传输到互联节点。不仅第一传输业务单元 可以具有上述结构，对于第二业务传输单元 405也可以具有上述类似结构， 即 可以包括第二状态判断子单元 4051和第二业务传输子单元 4052， 其中： 第二 状态判断子单元 4051， 用于判断出环节点所在环网的环网拓朴状态是否为预 设状态， 如果是， 则倒换到出环节点所在环网的工作通道或保护通道； 第二业 务传输子单元 4052， 用于通过倒换后的工作通道或保护通道将业务传输到出 环节点。
上述装置实施例的共享信息配置单元 401 针对不同的共享信息可以具有 不同的结构实现共享功能。 比如，共享信息配置单元 401可以包括所述出环节 点信息共享子单元 4011和环网拓朴状态共享子单元 4012, 前者用于将配置经 过相邻互联节点的一个互联节点的业务的出环节点信息实时或周期性地发送 给另一个互联节点，从而实现出环节点信息之间的共享； 后者用于在多环结构 网络的入环节点所在环网的节点或节点链路的状态改变时，将该节点或节点链 路的状态改变朝远离状态改变的节点链路方向逐节点通知到所述入环节点所 在环网的其他节点； 在入环节点所在环网的互联节点接收到状态改变通知后， 将状态改变通知到出环节点所在环网的各节点，从而实现出环节点所在环网对 入环节点所在环网的网絡拓 4卜信息的共享。 同样地 , 为实现入环节点所在环网 对出环节点所在环网的网絡拓朴信息的共享， 环网拓朴状态共享子单元 4012， 还可以用于在多环结构网絡的出环节点所在环网的节点或节点链路的状态改 变时，将读节点或节点链路的状态改变朝远离状态改变的节点链路方向逐节点 通知到所述出环节点所在环网的其他节点；在出环节点所在环网的互联节点接 收到状态改变通知后，将状态改变通知到入环节点所在环网的各节点。在实现 前述的共享过程中节点之间的报文传输可采用 APS协议进行。
为了描述的方便， 描述以上装置时以功能分为各种单元分别描述。 当然， 在实施本申请时可以把各单元的功能在同一个或多个软件和 /或硬件中实现。 比如，可以将全部功能单元形成一个整体装置， 用于控制整个相交环内的业务 传输保护，还可以将全部功能单元分散到各个相交环的环网节点上， 由这些节 点各自的功能单元相互配合实现本装置实施例的整体功能。
通过以上的实施方式的描述可知，本领域的技术人员可以清楚地了解到本 申请可借助软件加必需的通用硬件平台的方式来实现。基于这样的理解，本申 请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形 式体现出来，读计算机软件产品可以存储在存储介质中，如 ROM/RAM、磁碟、 光盘等，包括若干指令用以使得一台计算机设备（可以是个人计算机，服务器， 或者网络设备等 )执行本申请各个实施例或者实施例的某些部分所述的方法。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相 似的部分互相参见即可， 每个实施例重点说明的都是与其他实施例的不同之 处。 尤其， 对于系统实施例而言， 由于其基本相似于方法实施例， 所以描述得 比较筒单，相关之处参见方法实施例的部分说明即可。 以上所描述的系统实施 例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是 物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元， 即可以 位于一个地方， 或者也可以分布到多个网络单元上。 可以根据实际的需要选择 其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在 不付出创造性劳动的情况下， 即可以理解并实施。
本申请可用于众多通用或专用的计算系统环境或配置中。 例如： 个人计算 机、 服务器计算机、 手持设备或便携式设备、 平板型设备、 多处理器系统、 基 于微处理器的系统、 置顶盒、 可编程的消费电子设备、 网各 PC、 小型计算机、 大型计算机、 包括以上任何系统或设备的分布式计算环境等等。
本申请可以在由计算机执行的计算机可执行指令的一般上下文中描述，例 如程序模块。一般地，程序模块包括执行特定任务或实现特定抽象数据类型的 例程、 程序、 对象、 组件、 数据结构等等。 也可以在分布式计算环境中实践本 申请，在这些分布式计算环境中， 由通过通信网絡而被连接的远程处理设备来 执行任务。在分布式计算环境中，程序模块可以位于包括存储设备在内的本地 和远程计算机存储介质中。
以上所述仅是本申请的具体实施方式，应当指出，对于本技术领域的普通 技术人员来说， 在不脱离本申请原理的前提下， 还可以做出若干改进和润饰， 这些改进和润饰也应视为本申请的保护范围。

Claims

权 利 要 求
1、 一种基于多环结构网各相交环的业务的传输保护方法， 其特征在于， 该方法包括：
当通过业务的入环节点所在环网的工作通道或保护通道将业务传输到互 联节点时，如果根据相交环拓朴状态信息判断出业务自该互联节点可达业务的 出环节点， 则在读互联节点根据出环节点信息跨环到出环节点所在环网， 所述 互联节点预先共享业务的出环节点信息，所述入环节点所在环网与出环节点所 在环网预先共享相交环拓朴状态信息；
通过出环节点所在环网的工作通道或保护通道将业务传输到出环节点。
2、 根据权利要求 1所述的方法， 其特征在于， 所述在该互联节点根据出 环节点信息跨环到出环节点所在环网包括：
将承载业务的消息携带的入环节点所在环网的工作通道或保护通道标签 从消息中剥离，将出环节点所在环网的工作通道或保护通道标签推入承载业务 的消息。
3、 根据权利要求 2所述的方法， 其特征在于， 环网工作通道或保护通道 包括环通道逻辑层，所述将承载业务的消息携带的入环节点所在环网的工作通 道或保护通道标签从消息中剥离，将出环节点所在环网的工作通道或保护通道 标签推入承载业务的消息具体包括：
将承载业务的消息携带的入环节点所在环网的工作通道或保护通道标签 从承载业务的消息的环通道逻辑层剥离，将出环节点所在环网的工作通道或保 护通道标签推入承载业务的消息的环通道逻辑层。
4、 根据权利要求 1至 3中任何一项所述的方法， 其特征在于， 所述通过 业务的入环节点所在环网的工作通道或保护通道将业务传输到互联节点具体 包括：
当入环节点所在环网的环网拓朴状态为预设状态时，倒换到入环节点所在 环网的工作通道或保护通道，通过倒换后的工作通道或保护通道将业务传输到 互联节点； 和 /或，
所述通过出环节点所在环网的工作通道或保护通道将业务传输到出环节 点具体包括： 当出环节点所在环网的环网拓朴状态为预设状态时，倒换到出环节点所在 环网的工作通道或保护通道，通过倒换后的工作通道或保护通道将业务传输到 出环节点。
5、 根据权利要求 1至 3中任何一项所述的方法， 其特征在于， 所述互联 节点预先共享业务的出环节点信息，所述入环节点所在环网与出环节点所在环 网预先共享相交环拓朴状态信息包括：
相邻互联节点的一个互联节点将配置经过自身的业务的出环节点信息实 时或周期性地发送给另一个互联节点以实现业务的出环节点信息的共享； 当入环节点所在环网的节点或节点链路的状态改变时，将该节点或节点链 路的状态改变朝远离状态改变的节点链路方向逐节点通知到所述入环节点所 在环网的其他节点；入环节点所在环网的互联节点接收到状态改变通知后将状 态改变通知到出环节点所在环网的各节点以实现入环节点所在环网的拓朴状 态信息的共享；
当出环节点所在环网的节点或节点链路的状态改变时，将该节点或节点链 路的状态改变朝远离状态改变的节点链路方向逐节点通知到所述出环节点所 在环网的其他节点；出环节点所在环网的互联节点接收到状态改变通知后将状 态改变通知到入环节点所在环网的各节点以实现出环节点所在环网的拓朴状 态信息的共享。
6、 根据权利要求 1至 3中任何一项所述的方法， 其特征在于， 根据相交 环拓朴状态信息判断业务自互联节点是否可达业务的出环节点具体为：
在入环节点处或互联节点处根据相交环拓朴状态信息判断业务自互联节 点是否可达业务的出环节点。
7、 一种基于多环结构网各相交环的业务的传输保护装置， 其特征在于， 该装置包括： 第一业务传输单元、 可达性判断单元、跨环操作单元和第二业务 传输单元， 其中：
所述第一业务传输单元，用于通过业务的入环节点所在环网的工作通道或 保护通道将业务传输到互联节点， 所述互联节点预先共享业务的出环节点信 所述可达性判断单元，用于根据相交环拓朴状态信息判断业务自互联节点 是否可达业务的出环节点；
所述跨环操作单元，用于在通过业务的入环节点所在环网的工作通道或保 护通道将业务传输到互联节点时，如果可达性判断单元根据相交环拓朴状态信 息判断出业务自该互联节点可达业务的出环节点，则在该互联节点根据出环节 点信息跨环到出环节点所在环网，所述入环节点所在环网与出环节点所在环网 预先共享相交环拓朴状态信息；
所述第二业务传输单元，用于通过出环节点所在环网的工作通道或保护通 道将业务传输到出环节点。
8、 根据权利要求 7所述的装置， 其特征在于， 所述跨环操作单元包括标 签剥离子单元和标签推入子单元， 其中：
所述标签剥离子单元，用于将承载业务的消息携带的入环节点所在环网的 工作通道或保护通道标签从消息中剥离；
所述标签推入子单元，用于将出环节点所在环网的工作通道或保护通道标 签推入承载业务的消息。
9、 根据权利要求 8所述的装置， 其特征在于， 所述业务工作通道或保护 通道包括环通道逻辑层，所述标签剥离子单元具体用于将承载业务的消息携带 的入环节点所在环网的工作通道或保护通道标签从承载业务的消息的环通道 逻辑层剥离，所述标签推入子单元具体用于将出环节点所在环网的工作通道或 保护通道标签推入承载业务的消息的环通道逻辑层。
10、 根据权利要求 7至 9中任何一项所述的装置， 其特征在于， 所述第一业务传输单元包括第一状态判断子单元和第一业务传输子单元， 其中： 所述第一状态判断子单元， 用于判断入环节点所在环网的环网拓朴状态 是否为预设状态，如果是，则倒换到入环节点所在环网的工作通道或保护通道； 所述第一业务传输子单元，用于通过倒换后的工作通道或保护通道将业务传输 到互联节点； 和 /或，
所述第二业务传输单元包括第二状态判断子单元和第二业务传输子单元， 其中： 所述第二状态判断子单元， 用于判断出环节点所在环网的环网拓朴状态 是否为预设状态，如果是，则倒换到出环节点所在环网的工作通道或保护通道； 所述第二业务传输子单元，用于通过倒换后的工作通道或保护通道将业务传输 到出环节点。
11、 根据权利要求 7至 9中任何一项所述的装置， 其特征在于， 所述装置 包括共享信息配置单元， 用于配置多环结构网各相交环的互联节点，使相邻互 联节点间共享业务的出环节点信息，以及使入环节点所在环网与出环节点所在 环网共享相交环拓朴状态信息，该共享信息配置单元具体包括出环节点信息共 享子单元和环网拓朴状态共享子单元， 其中：
所述出环节点信息共享子单元，用于将配置经过相邻互联节点的一个互联 节点的业务的出环节点信息实时或周期性地发送给另一个互联节点以实现业 务的出环节点信息的共享；
所述环网拓朴状态共享子单元，用于在入环节点所在环网的节点或节点链 路的状态改变时，将该节点或节点链路的状态改变朝远离状态改变的节点链路 方向逐节点通知到所述入环节点所在环网的其他节点；在入环节点所在环网的 互联节点接收到状态改变通知后，将状态改变通知到出环节点所在环网的各节 点以实现入环节点所在环网的拓朴状态信息的共享；
所述环网拓朴状态共享子单元，还用于在出环节点所在环网的节点或节点 链路的状态改变时，将该节点或节点链路的状态改变朝远离状态改变的节点链 路方向逐节点通知到所述出环节点所在环网的其他节点；在出环节点所在环网 的互联节点接收到状态改变通知后，将状态改变通知到入环节点所在环网的各 节点以实现出环节点所在环网的拓朴状态信息的共享。
12、 根据权利要求 7至 9中任何一项所述的装置， 其特征在于， 所述可达 性判断单元具体用于在入环节点处或互联节点处根据相交环拓朴状态信息判 断业务自互联节点是否可达业务的出环节点。
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