WO2011110112A1 - 业务恢复方法、系统和节点设备 - Google Patents
业务恢复方法、系统和节点设备 Download PDFInfo
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- WO2011110112A1 WO2011110112A1 PCT/CN2011/072176 CN2011072176W WO2011110112A1 WO 2011110112 A1 WO2011110112 A1 WO 2011110112A1 CN 2011072176 W CN2011072176 W CN 2011072176W WO 2011110112 A1 WO2011110112 A1 WO 2011110112A1
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- WIPO (PCT)
- Prior art keywords
- recovery
- service
- node
- time slot
- path
- Prior art date
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
Definitions
- the present invention relates to the field of network communication technologies, and in particular, to a service recovery method, system, and node device. Background technique
- OTN Optical Transport Network
- the OTN defines the electrical layer encapsulation structure.
- the client signal needs to be mapped to an Overhead Processing Unit (OPU).
- OPU can be encapsulated into an Optical Channel Data Unit (ODU).
- ODU can be encapsulated into an Optical Channel Transport Unit (OTU), or multiple low-order ODUs (low-rate ODUs) multiplexed into a high-order ODU (high-speed ODU), high-order ODU.
- OFTU Optical Channel Transport Unit
- the OTU can be transmitted using one wavelength.
- GPLS Multi-Protocol Label Switching
- Figure 1 is a flow chart of a method for service recovery in the prior art.
- the existing business recovery methods mainly include:
- the source node performs time slot allocation for the service, and then sends a path (Path) message to the downstream node along the direction from the source node to the destination node.
- the Path message carries the recovery path information and the allocated recovery time slot information.
- the intermediate node receives the Path message sent by the upstream node, parses the received Path message to obtain the recovery path information, and recovers the slot information, and allocates time slots for the service according to the slot information and the recovered slot information available to the node device itself. Determine the recovery channel and then establish the intersection of the recovery channels The connection, the update time slot information in the Path message is updated, and the updated Path message is sent to the downstream node along the direction from the source node to the destination node.
- the destination node receives the updated Path message sent by the upstream node, parses the received updated Path message to obtain the restoration path information and the recovery slot information, according to the slot information and the recovery slot information available to the node device itself.
- a time slot allocation is performed for the service, and a Reservation (Resv) message is returned to the upstream node along the direction of the destination node to the source node.
- Resv Reservation
- the intermediate node receives the Resv message sent by the downstream node, and returns a Resv message to the upstream node along the direction of the destination node to the source node.
- the source node receives the Resv message sent by the downstream node.
- the existing service recovery method requires the intermediate node to parse the complex Path message and forward the Path message, which consumes more system resources, resulting in slower service recovery.
- the present invention provides a method, system, and node device for service recovery, which enables a node on a path to perform service recovery without parsing a Path message.
- An embodiment of the present invention provides a service recovery method, including:
- the node device receives the recovery path establishment request, where the recovery path establishment request carries the recovery path number corresponding to the service that needs to be restored;
- the node device configures at least one recovery channel according to the currently available time slot, and sends a restoration path establishment request to the neighboring node according to the recovery path information.
- the embodiment of the invention further provides a service recovery method, including:
- the node device After detecting the fault of the service working path of the service, the node device acquires state information of the service recovery path of the service; If the status of the service recovery path is normal, the node device acquires a recovery path number corresponding to the service, and obtains, according to the recovery path number, the preset recovery path information corresponding to the service and the currently available time.
- the node device configures at least one recovery channel according to the currently available time slot; the node device sends a recovery path establishment request to the downstream node according to the recovery path information, where the recovery path establishment request carries the recovery path number .
- the embodiment of the invention further provides a node device, including:
- a first receiving unit configured to receive a recovery path establishment request, where the recovery path establishment request carries a recovery path number corresponding to the service that needs to be restored;
- a first recovery path obtaining unit configured to acquire preset restoration path information corresponding to the service according to the restoration path number
- a first recovery time slot obtaining unit configured to acquire, according to the restoration path number, a preset currently available time slot corresponding to the service
- a first determining unit configured to determine, according to the recovery path information, whether the node device is an end node of the service
- a first channel configuration unit configured to: when the first determining unit determines that the node device is not an end node of the service, configure at least two recovery channels according to the currently available time slot, and establish the at least two Cross-connections of recovery channels;
- the first request message sending unit is configured to: when the first determining unit determines that the node device is not an end node of the service, send the recovery path establishment request to the downstream node according to the restoration path information.
- the embodiment of the invention further provides a node device, including:
- a second receiving unit configured to receive a recovery path establishment request, where the recovery path establishment request carries a recovery path number corresponding to the service to be restored;
- a second recovery path obtaining unit configured to acquire preset restoration path information corresponding to the service according to the restoration path number
- a second recovery time slot obtaining unit configured to acquire, according to the restoration path number, a preset currently available time slot corresponding to the service
- a second determining unit configured to determine, according to the recovery path information, whether the node device is an end node of the service
- a second channel configuration unit configured to: when the second determining unit determines that the node device is an end node of the service, configure at least one recovery channel according to a currently available time slot;
- a second request message sending unit configured to: when the second determining unit determines that the node device is an end node of the service, send a restoration path establishment request to the neighboring node according to the recovery path information.
- the embodiment of the invention further provides a node device, including:
- a state obtaining unit configured to acquire state information of a service recovery path of the service after detecting a fault of a working path of the service
- a third recovery path acquiring unit configured to acquire a restoration path number corresponding to the service when the status of the service recovery path is normal, and obtain preset restoration path information corresponding to the service according to the recovery path number ;
- a third recovery time slot acquiring unit configured to acquire, according to the recovery path number, a preset currently available time slot resource corresponding to the service, when the status of the service recovery path is normal;
- a third channel configuration unit configured to configure at least one recovery channel according to the currently available time slot
- a third request message sending unit configured to send a recovery path establishment request to the downstream node according to the recovery path information, where the recovery path establishment request carries the recovery path number.
- the embodiment of the invention further provides a service recovery system, which comprises the node device as described above.
- the recovery path establishment request transmitted in the embodiment of the present invention only needs to carry the restoration path number, and does not need to carry the recovery path information and the recovery time slot information, as compared with the prior art, which needs to transmit and parse the Path message between the nodes.
- the node device directly uses the reserved time slot to recover the service according to the recovery path number, thereby speeding up the service recovery and effectively saving system resources.
- FIG. 1 is a schematic flowchart of a service recovery method in the prior art
- FIG. 2 is a flowchart of a service recovery method according to Embodiment 1 of the present invention.
- FIG. 3 is a flowchart of a method for obtaining a time slot currently available for a service according to a restoration path number according to Embodiment 1 of the present invention
- FIG. 5 is a schematic diagram of an application scenario of a service recovery method according to an embodiment of the present disclosure
- FIG. 6 is a schematic flowchart of a path recovery method according to Embodiment 3 of the present invention.
- FIG. 7 is a schematic structural diagram of a node device according to Embodiment 4 of the present invention.
- FIG. 8 is a schematic structural diagram of a first recovery slot acquiring unit in a node device according to Embodiment 4 of the present invention.
- FIG. 9 is a schematic structural diagram of a node device according to Embodiment 5 of the present invention.
- FIG. 10 is a schematic structural diagram of a second recovery slot acquisition unit in a node device according to Embodiment 5 of the present invention.
- FIG. 11 is a schematic structural diagram of a node device according to Embodiment 6 of the present invention.
- FIG. 12 is a schematic structural diagram of a service recovery system according to Embodiment 7 of the present invention. detailed description
- FIG. 2 is a flowchart of a service recovery method according to Embodiment 1 of the present invention.
- the service recovery method provided by the first embodiment of the present invention mainly includes the following steps:
- the node device receives the recovery path establishment request, and the recovery path establishment request carries the recovery path number corresponding to the service that needs to be restored.
- the node device may receive a recovery path establishment request sent by the upstream node device or the network management device, where the recovery path establishment request carries the recovery path number corresponding to the service to be restored, and the restoration path establishment request is used to trigger the service recovery process.
- the restoration path establishment request is sent by the source node
- the node device that receives the restoration path establishment request is an intermediate node or a destination node.
- the restoration path establishment request is sent by the network management device
- the node device that receives the restoration path establishment request may be a source node, an intermediate node, or a destination node.
- a node on both ends of a recovery path is referred to as an end node, and a node other than the end node on the recovery path is referred to as an intermediate node.
- the source node and the destination node in the embodiment of the present invention are opposite.
- the end node that triggers the service recovery process on the service recovery path is the source node, and the other end node on the recovery path is the destination node.
- the above-mentioned upstream refers to the order in which the recovery path establishment request is transmitted from the source node to the destination node, and the node that previously transmitted the restoration path establishment request is located upstream of the node that transmits the restoration path establishment request.
- the downstream refers to the sequence of transmitting the restoration path establishment request from the source node to the destination node, and the node transmitting the restoration path establishment request is located downstream of the node transmitting the restoration path establishment request.
- the node device acquires the preset recovery path information corresponding to the service and the currently available time slot according to the restoration path number.
- the node device may obtain the preset recovery path information corresponding to the service and the currently available time slot according to the restoration path number carried in the restoration path establishment request.
- the node device can pre-configure the correspondence between the recovery path number and the recovery path information of the service to be restored, and then, after receiving the restoration path establishment request, find the corresponding restoration path information according to the restoration path number.
- the recovery path information may include all nodes on the recovery path or only upstream nodes and/or downstream nodes of the node device. If the recovery path information includes only the upstream node and/or the downstream node of the node device, system resources can be saved, and the search efficiency can be effectively improved.
- the node device determines, according to the recovery path information, whether the node device is an end node of the service. Specifically, the node device may determine, according to the obtained recovery path information, whether the node device itself is an end node of the service that needs to be restored. If the node device is not an end node, that is, the node device that receives the restoration path establishment request is an intermediate node, step B4 is performed. If the node device is an end node, step B5 is performed. B4. The node device configures at least two recovery channels according to the currently available time slots of the service, establishes a cross connection of at least two recovery channels, and sends a recovery path establishment request to the downstream node according to the recovery path information.
- the intermediate node may configure at least two recovery channels according to the acquired time slots, and then establish a cross connection of at least two recovery channels.
- the two recovery channels respectively correspond to the uplink and downlink directions of the service.
- the intermediate node also sends the recovery path establishment request to the downstream node according to the obtained recovery path information, thereby triggering the downstream node to recover the service.
- the downstream node is still an intermediate node, after receiving the restoration path establishment request, the above steps B2-B4 are performed to complete the service recovery on the node, and finally the restoration path establishment request is transmitted to the destination node. If the downstream node is the destination node, the specific execution process is as follows.
- the node device configures at least one recovery channel according to the currently available time slot of the service, and sends a restoration path establishment request to the neighboring node according to the recovery path information.
- the node device is an end node. If the node device is the source node, the recovery path establishment request received by the source node is sent by the network management system, and the source node configures at least one recovery channel for the service according to the currently available time slot of the service, according to the recovery path information.
- the neighboring node (in this case, the downstream node of the source node) sends a recovery path establishment request. If the downstream node is an intermediate node, proceed to step B2-B4 to complete the service recovery on the node, and finally send the recovery path establishment request to the destination node. If the downstream node is the destination node, the specific execution process is as follows.
- the destination node receives the recovery path establishment request sent by the upstream node (the intermediate node or the source node), and configures at least one recovery channel according to the currently available time slot of the service, according to the recovery path information.
- the neighboring node (the upstream node of the destination node at this time) sends a recovery path establishment request.
- the destination node can send or receive service data of the service through the recovery channel.
- the neighboring node of the destination node may be an upstream node of the destination node. If the upstream node is an intermediate node, the intermediate node transmits the received restoration path establishment request to the source node node by node along the direction of the destination node to the source node. If the upstream node is the source node, the source node directly receives the recovery path establishment request sent by the destination node. Finally, the source node can learn about the recovery of the service. The path has been established, and the source node can send or receive service data of the service through the recovery channel.
- FIG. 3 is a flowchart of a method for obtaining a preset currently available time slot corresponding to the service according to the restoration path number in the first embodiment of the present invention.
- the network management device or the end node may pre-calculate the recovery path information of the service and the time slot information of the recovery path, and then configure the recovery path information and the time slot information of the restoration path on the node device.
- the configuration process of protecting resource information (that is, recovering path information and time slot information of the restoration path) may be implemented by a network management device or by signaling of a control plane.
- a service may be configured with two or more time slots in advance.
- the process of obtaining the time slot currently available for the service according to the recovery path number may include:
- the node device may search for the preset mapping table according to the restoration path number to obtain the corresponding protection resource and the recovery bandwidth of the service, and the bandwidth of the time slot in the found protection resource is greater than or equal to the recovery bandwidth.
- the recovery bandwidth is the bandwidth required for service recovery of the service to be recovered.
- the node device obtains a currently available time slot whose bandwidth is equal to the recovery bandwidth from the protection resource, so as to configure a recovery channel for the service to be restored, and establish a cross connection of the recovery channel.
- the time slot with a large bandwidth is reserved, and the available time slot is obtained from the protection resource when needed.
- the embodiment of the present invention can increase the probability of successfully obtaining the available time slot, and then the probability is obtained. According to the obtained time slot, the recovery channel is quickly configured for the service to be restored, and the cross-connection of the recovery channel is established, thereby improving the stability of service recovery.
- FIG. 4 is a flowchart of a service recovery method according to Embodiment 2 of the present invention.
- the service recovery method provided by the second embodiment of the present invention if the current working path of the service fails, the service is restored.
- the service recovery method provided by the second embodiment of the present invention triggers the service recovery process by the source node, which specifically includes:
- the node device After detecting the fault of the working path of the service, the node device obtains the state information of the recovery path of the service.
- the source node After detecting the fault of the working path of the service, the source node obtains the state information of the recovery path preset by the service.
- the status information of the recovery path may include a status normal, a status failure, and the like.
- the service recovery path state is normal, and step E2 is performed.
- the node device that triggers the service recovery process may be a source node device or a destination node device.
- the node device acquires the recovery path number corresponding to the service to be restored, and obtains the preset recovery path information corresponding to the service and the currently available time slot according to the restoration path number.
- the source node when the current state of the service recovery path is normal, the source node obtains the recovery path number corresponding to the service to be restored, and then obtains the preset current available time corresponding to the service according to the restoration path number. Gap and recovery path information.
- the source node device may pre-configure the correspondence between the recovery path number of the service to be restored and the recovery path information and the currently available time slot, and further find the corresponding recovery path information according to the recovery path number.
- the recovery path information may include all the nodes on the recovery path or only the upstream node and/or the downstream node of the node device.
- only the downstream node of the source node may be included, thereby saving system resources and being effective. Improve search efficiency.
- the node device configures at least one recovery channel according to the currently available time slot.
- the source node configures at least one recovery channel for the service to be restored according to the acquired time slot, so as to transmit the service by using the restored channel.
- the node device sends a recovery path establishment request to the downstream node according to the recovery path information, where the recovery path establishment request carries the restoration path number.
- the source node sends a recovery path establishment request to the downstream node according to the obtained recovery path information, where the recovery path establishment request is used to trigger the downstream node to recover the service.
- the recovery path establishment request carries the recovery path number corresponding to the service to be restored. After receiving the restoration path establishment request, the downstream node triggers the recovery process of the service corresponding to the restoration path number.
- the source node restores the channel according to the currently available time slot of the service in the service recovery process, thereby completing service recovery on the node.
- the recovery path establishment request is sent to the downstream node, and the other nodes except the source node on the service recovery path are triggered to perform service recovery one by one, and finally the service recovery process is completed.
- the recovery path establishment request transmitted in the embodiment of the present invention does not need to carry the recovery path information and the recovery time slot information, and the node device directly uses the reserved time slot, as compared with the prior art, which needs to transmit and parse the Path message between the nodes. To restore business, it can speed up business recovery and save system resources.
- the node device when sending the restoration path establishment request, may transmit the restoration path establishment request through the optical channel transmission unit overhead or the high-order optical channel data unit overhead.
- the source node may pre-calculate the recovery path information of the service and the slot information available for the service, and then configure the restoration path information and the slot information on the node device.
- a service may be configured with two or more time slots in advance.
- the time slot (step E2) that is currently available for obtaining the service according to the recovery path number may be:
- the preset mapping table obtains the corresponding protection resource and the recovery bandwidth of the service, and the bandwidth of the time slot in the protection resource is greater than or equal to the recovery bandwidth, and then the source node obtains the bandwidth from the protection resource equal to the currently available time of the recovery bandwidth. Gap, in order to configure the recovery channel for the service, establish a cross-connection of the recovery channel.
- FIG. 5 is a schematic diagram of an application scenario of a service recovery method according to an embodiment of the present invention.
- the thin line indicates the working path of each service
- the thick line indicates an OTU link.
- the thick line in the pipe indicates one time slot in the OTU link, which can be used for service recovery.
- Service 1 and service 2 are ODU0 services and need to occupy 1 time slot.
- Service 3 is an ODU1 service and needs to occupy 2 time slots.
- the ODU0 service and the ODU1 service have different bandwidths, so different time slots are required.
- Service 1 has the highest priority, business has 2 times, and business 3 has the lowest.
- the source node or the network management device can pre-calculate the recovery path information and the time slot of the recovery path.
- the recovery path information of the above three services is as follows:
- Service 3 N5- (time slot 7/8) -N6- (time slot 3/4) -N8- (time slot 9/10) -N3 source node or network management device pre-configured and restored at each node through which the recovery path passes information.
- the recovery information includes the protection resources, recovery path number, and recovery path information of the service that needs to be recovered.
- the recovery information may also include the priority of the service that needs to be restored. In this application scenario, service 1 has the highest priority, service 2 has the second priority, and service 3 has the lowest priority.
- the recovery path information is the upstream node and/or downstream node of the node device.
- the node device When configuring the time slot of the service to be restored, if the node device is the end node of the service, configure a time slot of one dimension; if it is an intermediate node of the service, configure a time slot of two dimensions.
- the above "one dimension” is the OTU link in one direction, and the above “two dimensions” are the OTU links in two directions.
- service 1 needs to configure time slot 1 on end node N1
- service 1 needs to configure time slot 1 and time slot 3 on intermediate node N6.
- the recovery information configured by node N1 can be as shown in Table 1: Interest - protection resources recovery road adjacent protection recovery road adjacent
- Path number P point resource path number 10
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- P point service 1 ODU0
- the N1 node configures the protection resource for service 1 and service 2 in the 2# dimension, and configures the recovery path information of service 1 and service 2 to be adjacent node N6.
- the # dimension holds the endpoint information of service 1 and service 2.
- the endpoints of service 1 and service 2 are channel 11 and channel 12, respectively.
- the priority (10) of business 1 is higher than the priority of business 2 (20).
- the recovery information of the node N2 configuration can be as shown in Table 2:
- the node N2 is the end node of the service 1 and the service 2, and only needs to configure the protection resource in one dimension. Therefore, the N2 configures the time slot resource for the service 1 and the service 2 in the 2# dimension, and configures the service 1 and the service.
- the recovery path information of 2 is the neighboring node N8, and the endpoint information of the service 1 and the service 2 is stored in the 1# dimension, and the endpoints of the service 1 and the service 2 are the channel 21 and the channel 22, respectively.
- the priority of service 1 (10) is higher than the priority of service 2 (20).
- No. Service 3 ODU1 ) 30 Channel 33 Time slot 9/10 3 N8 where Node N3 is the end node of Service 3, and only needs to configure protection resources in one dimension. Therefore, when N3 is configured for Service 3 in the 2# dimension, The gap resource, and the recovery path information of the service 3 is the neighbor node N8, the endpoint information of the service 3 is stored in the 1# dimension, and the endpoint of the service 3 is the channel 33.
- the priority (30) of service 3 is lower than the priority of service 1 and service 2.
- the recovery information of the node N5 configuration is shown in Table 4.
- the node N5 is the end node of the service 3, and only needs to configure the protection resource in one dimension. Therefore, the N5 configures the time slot resource for the service 3 in the 2# dimension, and the recovery path information of the service 3 is the adjacent node. N6, in the 1# dimension, the endpoint information of the service 3 is stored, and the endpoint of the service 3 is the channel 53.
- the priority (30) of service 3 is lower than the priority of service 1, service 2.
- the recovery information of the node N6 configuration is shown in Table 5.
- the node N6 is an intermediate node and is configured from two dimensions.
- the time slot resources are respectively configured for the service 1, the service 2, and the service 3, and the recovery path information of the service 1, the service 2, and the service 3 is respectively configured as the adjacent nodes N1, N1, and N5;
- the protection resources are configured as the protection group 10, and the time slot resources in the protection group 10 are shared by the service 1, the service 2, and the service 3, and the recovery path information of the service 1, the service 2, and the service 3 is configured as the adjacent node.
- Included in protection group 10 Slot 3 and time slot 4 may also include more time slots.
- the priority of service 1 (10) is higher than the priority of service 2 (20).
- the priority (30) of service 3 is lower than the priority of service 1 and service 2.
- the recovery information of the node N8 configuration is shown in Table 6.
- node N8 is an intermediate node and is configured from two dimensions.
- the time slot resources are respectively configured for the service 1, the service 2, and the service 3, and the recovery path information of the service 1, the service 2, and the service 3 is respectively configured as the adjacent nodes N2, N2, and N3;
- the protection resources are configured as the protection group 10, and the time slot resources in the protection group 10 are shared by the service 1, the service 2, and the service 3, and the recovery path information of the service 1, the service 2, and the service 3 is configured as the adjacent node. N6.
- the protection resource 10 includes time slot 3 and time slot 4, and may also include more time slots.
- the priority (10) of service 1 is higher than the priority (20) of service 2.
- the priority (30) of service 3 is lower than the priority of service 1, service 2.
- FIG. 6 is a flowchart of a path recovery method according to Embodiment 3 of the present invention.
- the method provided by the embodiment of the present invention is based on the foregoing application scenario, and in this application scenario, the format of the recovery message is defined in advance.
- the recovery message format is as follows:
- the message type recovery path number is that the node device can use the OTU overhead or the overhead of the high-order ODU to transmit the foregoing recovery message, for example, one or more reserved (Reserve, RES) byte overhead, or automatic protection switching (Automatic Protection Switching) Protection Switching (APS) or Protection Communication Channel (PCC) overhead.
- the structure of the recovery message defined in the embodiment of the present invention is relatively simple, and the system resources of the device can be effectively saved.
- the embodiment of the present invention may adopt a simple advanced data link.
- High-Level Data Link Control (HDLC) format encapsulation used for message transmission and reception.
- the recovery message encapsulation format is as follows:
- the recovery message can also be encapsulated in IP.
- the recovery message can be transmitted by the control channel (the control channel can be implemented by the overhead of the OTU/ODU, or can be implemented by using a control channel other than the OTU, for example.
- the Ethernet link between nodes) the recovery message encapsulation format is as follows:
- the status of the service recovery path includes:
- the protection resource status is normal at the initial time; at some point, the OTU link between N3 and N8 fails, resulting in failure, that is, the slot 9/10 is invalid, and the time slot 9/10 is required for the recovery path of service 3, Therefore, the two endpoints of the service 3 need to be able to know the fault and update the recovery path status of the service 3 to "failed". In this case, the service 3 is forbidden to automatically trigger the recovery process, that is, when the service 3 is faulty, the recovery path is prohibited. .
- N3 finds the recovery information (Table 3 above), and finds that the service 3 is configured with the time slot in the failed OTU link, and N3 is the end of the service 3, so the recovery path status of the service 3 is updated to "failed".
- N8 detects the OTU link failure, finds the recovery information (Table 6 above), and finds that the time slot in the failed OTU link is configured for the recovery path of service 3, and N8 is not the endpoint of service 3, so N8 and N6 are utilized.
- N5 receives the "Recovery Path Setup Request" message from service 3 of N6, finds the recovery information of N5 (Table 4 above), finds that it is the endpoint of service 3, and according to the recovery path status message of the received service 3, And the state of time slots 7, 8 or the current state of its corresponding OTU link
- the node device needs to select the worst state according to the received recovery path state message and the current state of the recovery path of the service associated with the message, and send it to the next node and directly transmit it to the end node.
- the end node can obtain the worst protection resource status as the status information of its recovery path.
- the status can be ranked from bad to good in the following order: invalid, occupied by high-priority services, degraded by signals, occupied by low-priority services, and normal.
- the result of the recovery path state maintained by the service endpoint can be as follows: 1) In the recovery path, as long as the resource of one segment fails, the state of the recovery path is "invalid,;
- the improved service recovery process in Embodiment 3 of the present invention includes:
- the node N1 After detecting the fault of the working path of the service, the node N1 obtains the state information of the service recovery path.
- the source node obtains state information of the service recovery path of the service 1.
- the status of the service recovery path is normal, and step S2 is performed.
- the node N1 obtains the recovery path number corresponding to the service 1, and obtains the preset recovery path information corresponding to the service 1 and the currently available time slot according to the restoration path number.
- the node N1 can look up the foregoing table 1, and obtain the recovery path information of the time slot 1 and the service 1 that are currently available for the service 1 .
- the recovery path information of service 1 is node N6, and node N6 is the downstream node of node N1 on the restoration path.
- the node N1 configures a recovery channel for the service 1 according to the obtained time slot, and sends a restoration path establishment request to the node N6.
- the node N1 configures the acquired time slot (slot 1) as an ODU0 channel, transmits the service 1 by using the ODU0 channel, and sends a recovery path establishment request to the downstream node (the node N6), triggering the N6 to perform the service recovery process.
- the recovery path number carried in the restoration path establishment request is 1, indicating that service 1 needs to be restored.
- the node N6 receives the restoration path establishment request, and obtains the service 1 corresponding according to the restoration path number. Recovery path information and currently available time slots.
- the node N6 searches the table 5 according to the recovery path number 1 in the recovery path establishment request (1# dimension) sent by the N1, and the node (node N1) that sends the restoration path establishment request, and learns that the 1# dimension is assigned to the service 1
- the protection resource used is the time slot 1
- the time slot allocated to the service 1 is the protection group 10. Since all the time slots in the protection group 10 are in normal state and there is no service occupation, the lowest number is selected from the protection group 10.
- the time slot (time slot 3) is used as the time slot in which the service 1 is available in the 2# dimension.
- the embodiment of the present invention may further preset a time slot selection rule in the protection resource, for example, selecting a time slot with a time slot number from small to large according to a service priority, or selecting a service priority from low to high. Select a time slot with a slot number from small to large.
- the time slot selection rule in the preset protection resource can make it unnecessary for the neighboring node devices to negotiate to determine how to select the time slot, which can further accelerate the service recovery speed.
- the node N6 obtains the recovery path information of the service 1 according to the recovery path number lookup table 5, and the recovery path information includes a plurality of adjacent nodes (N1, N8).
- the node N6 determines, according to the recovery path information, whether the node itself is an end node of the service 1. In the embodiment of the present invention, if the node N6 has the upstream node N1 and the downstream node N8, it indicates that the node N6 is not an end node, and step S6 is performed.
- Node N6 configures two recovery channels for service 1, and establishes a cross-connection.
- the node N6 configures the time slot 1 and the time slot 3 to be ODU0 channels respectively, and establishes a cross connection between the two ODU0 channels, so that the node N6 implements service recovery.
- the node N6 sends a recovery path establishment request to the node N8, and sends a message that the recovery path is occupied by the high priority service to the node N5.
- the node N6 sends a recovery path establishment request to the downstream node N8 on the service 1 recovery path by using the overhead or control channel between the N1 and the N6, and triggers the service recovery process of the node N8.
- the time slot 3 is occupied by the service 1, and the time slot 3 is also shared by the service 3.
- the priority of the service 1 is higher than the priority of the service 3. Therefore, the node N6 updates the recovery path state of the service 3, that is, uses N6 and N5.
- N5 receives the message and updates the service 3 recovery path status to "occupied by high priority service”.
- the time slot 3 is also shared by the service 2, but the service 2 only needs to occupy one time slot, and also the time slot 4 is available, so the recovery path state of the service 2 does not change.
- the node N8 receives the restoration path establishment request, and obtains the recovery path information of the service 1 and the currently available time slot according to the restoration path number.
- the node N8 receives the recovery path establishment request (2# dimension) sent by the N6, searches the foregoing table 6 according to the recovery path number 1, and obtains the protection resource used by the 1# dimension allocated to the service 1 as the time slot 5, 2# dimension allocation.
- the protection resource used by the service 1 is the protection group 10. Since all the time slots in the protection group 10 are normal and there is no service occupation, the time slot with the smallest number (slot 3) is selected as the service 1 from the protection group 10. Dimensional protection resources.
- the node N8 obtains the restoration path information of the service 1 according to the restoration path number.
- the recovery path information of the service 1 includes a plurality of adjacent nodes (N6, N2).
- the node N8 determines, according to the recovery path information, whether the node itself is an end node of the service 1. In the embodiment of the present invention, if the node N8 has the upstream node N6 and the downstream node N2, it is indicated that the node N8 is not an end node, and step S10 is performed.
- Node N8 configures two recovery channels for service 1, and establishes a cross connection.
- the node N8 configures the time slot 5 and the time slot 3 to be ODU0 channels respectively, and establishes a cross connection between the two ODU0 channels, so that the node N8 implements service recovery.
- the node N8 sends a recovery path establishment request to the node N2, and sends a message that the recovery path is occupied by the high priority service to the node N3.
- the node N8 sends a recovery path establishment request to the downstream node N2 on the service 1 recovery path by using the overhead or control channel between the N2 and the N8, and triggers the service recovery process of the node N2.
- time slot 3 is occupied by service 1. Since the time slot 3 is also shared by the service 3, and the priority of the service 1 is higher than the priority of the service 3, according to the rule of the previous embodiment, the N8 updates the recovery path state of the service 3, that is, between the N8 and the N3.
- the node N3 receives the message and updates the service 3 recovery path status to "occupied by the high priority service".
- time slot 3 is also shared by the service 2, but the service 2 only needs to occupy one time slot, and also the time slot 4 is available, so the recovery path state of the service 2 does not change. 512.
- the node N2 receives the restoration path establishment request, and obtains the recovery path information of the service 1 and the currently available time slot according to the restoration path number.
- the node N2 receives the restoration path establishment request sent by the node N8, and searches the foregoing table 2 according to the restoration path number to obtain the recovery path information of the time slot 5 and the service 1 that are currently available for the service 1.
- the recovery path information of the service 1 is the node N8, and the node N8 is the upstream node of the node N2 on the restoration path.
- the node N2 determines, according to the recovery path information, whether the node itself is an end node of the service 1. In the embodiment of the present invention, the node N2 only has the upstream node N8, and the node N2 is the end node, and step S14 is performed.
- the node N2 configures the recovery channel for the service 1 according to the time slot.
- the node N2 configures the time slot 5 as an ODU0 channel, receives service data from the ODU0 channel, and transmits the service 1 by using the ODU0 channel to implement service recovery on the destination node.
- Node N2 sends a recovery path establishment request to node N8.
- the node N2 returns a recovery path establishment request of the service 1 to the neighboring node, that is, the upstream node N8, according to the restoration path information.
- the node N8 After receiving the restoration path establishment request, the node N8 finds that the recovery path of the service 1 has been established, and forwards the received restoration path establishment request to the upstream node N6, and finally the N1 receives the recovery path establishment request of the service 1, and finds the service 1 The recovery path has been established. N1 can send or receive service data from the ODU0 channel, and the recovery process of service 1 is completed.
- N1 and N2 can initiate the service recovery process at the same time, that is, the end nodes N1 and N2 are in the same phase.
- the neighboring node sends a recovery path establishment request, and the process of the intermediate node processing the restoration path establishment request is described in the processing procedure of the intermediate node in the foregoing steps S4-S11, and details are not described herein again.
- the end nodes N1 and N2 After receiving the recovery path establishment request sent by the peer, the end nodes N1 and N2 finally complete the path recovery of the service 1.
- the service recovery of the two nodes at both ends can further accelerate the service recovery speed.
- FIG. 7 is a schematic structural diagram of a node device according to Embodiment 4 of the present invention.
- the node device provided in Embodiment 4 of the node device of the present invention includes:
- the first receiving unit 110 is configured to receive a restoration path establishment request, where the restoration path number corresponding to the service that needs to be restored is included in the restoration path establishment request;
- the first recovery path obtaining unit 120 is configured to obtain preset recovery path information corresponding to the service according to the restoration path number;
- a first recovery time slot obtaining unit 130 configured to acquire, according to the restoration path number, a preset currently available time slot corresponding to the service
- the first determining unit 140 is configured to determine, according to the restoration path information, whether the node device is an end node of the service;
- the first channel configuration unit 150 is configured to: when the first determining unit 140 determines that the node device is not the end node of the service, configure at least two recovery channels according to the currently available time slot, and establish an intersection of at least two recovery channels. Connection
- the first request message sending unit 160 is configured to, when the first determining unit 140 determines that the node device is not an end node of the service, send a restoration path establishment request to the downstream node according to the restoration path information.
- the node device provided in the fourth embodiment of the present invention can be used in the foregoing first embodiment of the service recovery method.
- FIG. 8 is a schematic structural diagram of a first recovery slot acquisition unit in a node device according to Embodiment 4 of the present invention.
- the first recovery time slot obtaining unit 130 in the node device may specifically include:
- the first searching module 131 is configured to search for a preset mapping table according to the recovery path number to obtain a recovery bandwidth of the corresponding protection resource and the service, where the bandwidth of the time slot in the protection resource is greater than or equal to the recovery bandwidth.
- the first obtaining module 132 uses The currently available time slot from which the bandwidth is equal to the recovery bandwidth is obtained from the protection resource.
- the node device provided by the embodiment of the present invention can obtain the available time slots with the bandwidth that meets the requirements, and the probability of successfully obtaining the available time slots can be increased according to the embodiment of the present invention.
- the obtained time slot quickly establishes a recovery channel, thereby improving the stability of service recovery.
- FIG. 9 is a schematic structural diagram of a node device according to Embodiment 5 of the present invention.
- the node device provided in Embodiment 5 of the node device of the present invention includes:
- the second receiving unit 210 is configured to receive a restoration path establishment request, where the restoration path number corresponding to the service that needs to be restored is included in the restoration path establishment request;
- the second restoration path obtaining unit 220 is configured to obtain preset recovery path information corresponding to the service according to the restoration path number;
- a second recovery time slot obtaining unit 230 configured to acquire, according to the restoration path number, a preset currently available time slot corresponding to the service
- the second determining unit 240 is configured to determine, according to the restoration path information, whether the node device is an end node of the service;
- the second channel configuration unit 250 is configured to: when the second determining unit determines that the node device is an end node of the service, configure at least one recovery channel according to the currently available time slot;
- the second request message sending unit 260 is configured to, when the second determining unit 240 determines that the node device is an end node, send a restoration path establishment request to the neighboring node according to the restoration path information.
- the node device provided in the fifth embodiment of the present invention can be used in the foregoing first embodiment of the service recovery method.
- FIG. 10 is a schematic structural diagram of a second recovery slot acquisition unit in a node device according to Embodiment 5 of the present invention.
- the second recovery time slot obtaining unit 230 may specifically include:
- the second search module 231 is configured to search for a preset mapping table according to the restoration path number to obtain a recovery bandwidth of the corresponding protection resource and the service, where the bandwidth of the time slot in the protection resource is greater than or equal to the recovery bandwidth; The currently available time slot from which the bandwidth is equal to the recovery bandwidth is obtained from the protection resource.
- FIG. 11 is a schematic structural diagram of a node device according to Embodiment 6 of the present invention.
- the node device provided in Embodiment 6 of the present invention mainly includes:
- the state obtaining unit 310 is configured to acquire state information of the service recovery path of the service after detecting a fault of the working path of the service;
- the third restoration path obtaining unit 320 is configured to acquire a restoration path number corresponding to the service when the status of the service recovery path is normal, and obtain preset restoration path information corresponding to the service according to the restoration path number;
- the third recovery time slot obtaining unit 330 is configured to acquire, according to the recovery path number, a preset currently available time slot resource corresponding to the service when the status of the service recovery path is normal;
- a third channel configuration unit 340 configured to configure at least one recovery channel according to a currently available time slot
- the third request message sending unit 350 is configured to send a recovery path establishment request to the downstream node according to the restoration path information, where the recovery path establishment request carries the restoration path number.
- the node device provided in the sixth embodiment of the present invention can be used in the foregoing second embodiment of the service recovery method.
- the third recovery time slot obtaining unit 330 may specifically include:
- a third search module configured to search for a preset mapping table according to the recovery path number to obtain a recovery bandwidth of the corresponding protection resource and the service, where a bandwidth of the time slot in the protection resource is greater than or equal to a recovery bandwidth; and a third acquiring module, configured to The currently available time slot in the protection resource is equal to the recovery bandwidth.
- the node device provided by the embodiment of the present invention is described in detail above.
- the embodiment of the present invention further provides a service recovery system corresponding to the device embodiment.
- FIG. 12 is a schematic structural diagram of a service recovery system according to Embodiment 7 of the present invention.
- the service recovery system provided by the seventh embodiment of the present invention includes the first node device 300 and the second node device 400.
- the specific structure of the first node device 300 is the same as that of the node device provided in the fourth embodiment.
- the specific structure of the second node device 400 is the same as that of the node device provided in the foregoing fifth and sixth embodiments. For details, refer to the foregoing fifth embodiment and the sixth embodiment, and the description is not repeated here.
- the program which can be implemented by a computer program to instruct related hardware, can be stored in a computer readable storage medium, which, when executed, can include the flow of an embodiment of the methods described above.
- 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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Description
业务恢复方法、 系统和节点设备
本申请要求于 2010 年 08 月 09 日提交中国专利局、 申请号为 201010252063.8、 发明名称为"业务恢复方法、 系统和节点设备"的中国专利申 请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及网络通信技术领域, 具体涉及一种业务恢复方法、 系统和节 点设备。 背景技术
光传送网络 ( Optical Transport Network, OTN )技术是新一代的标准化数
OTN定义了电层封装结构,客户信号需要映射到开销处理单元( Overhead Processing Unit, OPU ), OPU可以封装到一个光通道数据单元( Optical channel Data Unit, ODU )。 ODU 可以封装到一个光通道传送单元 ( Optical Channel Transport Unit, OTU ), 或者多个低阶 ODU (低速率等级的 ODU )复用到一 个高阶 ODU (高速路等级的 ODU ), 高阶 ODU再封装到一个 OTU。 OTU可 以利用一个波长传输。
现有技术中为提高 ODU业务的可靠性, 在当前的 ODU业务工作路径故 障时, 利用通用多协议标签交换( Generalized Multi-Protocol Label Switching, GMPLS )协议建立备用信令路径, 用于传送客户业务。
参见图 1, 图 1是现有技术中业务恢复方法的流程图。
其中, 现有的业务恢复方法主要包括:
Al、 源节点为业务进行时隙分配, 然后沿着源节点至目的节点的方向, 向下游节点发送路径(Path ) 消息, 该 Path消息中携带恢复路径信息、 分配 的恢复时隙信息。
A2、 中间节点接收上游节点发送的 Path消息,解析接收到的 Path消息获 得恢复路径信息和恢复时隙信息, 根据节点设备本身可用的时隙信息和恢复 时隙信息为该业务进行时隙分配, 确定恢复通道, 然后建立恢复通道的交叉
连接, 更新 Path消息中的恢复时隙信息, 沿着源节点至目的节点的方向, 向 下游节点发送更新后的 Path消息。
A3、 最终, 目的节点接收上游节点发送的更新后的 Path消息, 解析接收 到的更新后的 Path消息获得恢复路径信息和恢复时隙信息, 根据节点设备本 身可用的时隙信息和恢复时隙信息为该业务进行时隙分配, 沿着目的节点至 源节点的方向, 向上游节点返回预留 (Reservation, Resv ) 消息。
A4、 中间节点接收下游节点发送的 Resv消息, 沿着目的节点至源节点的 方向, 向上游节点返回 Resv消息。
A5、 最终, 源节点接收到下游节点发送的 Resv消息。
至此, 实现业务恢复。
现有的业务恢复方法需要中间节点解析复杂的 Path消息并转发 Path消 息, 消耗较多的系统资源, 导致业务恢复速度较慢。 发明内容
本发明提供了一种业务恢复的方法、 系统以及节点设备, 该技术方案使 得路径上的节点不需要解析 Path消息即可实现业务恢复。
为解决上述技术问题, 本发明实施例是采用如下技术方案来实现的。 本发明实施例提供一种业务恢复方法, 包括:
节点设备接收恢复路径建立请求, 所述恢复路径建立请求中携带需要恢 复的业务对应的恢复路径编号;
所述节点设备根据所述恢复路径编号获取预置于所述节点设备的与所述 业务对应的恢复路径信息和当前可用的时隙;
所述节点设备根据所述当前可用的时隙, 配置至少一个恢复通道, 根据 所述恢复路径信息向相邻节点发送恢复路径建立请求。
本发明实施例还提供一种业务恢复方法, 包括:
节点设备在检测到业务的业务工作路径故障后, 获取所述业务的业务恢 复路径的状态信息;
若所述业务恢复路径的状态正常, 则所述节点设备获取与所述业务对应 的恢复路径编号, 根据所述恢复路径编号获取预置的与所述业务对应的恢复 路径信息和当前可用的时隙;
所述节点设备根据所述当前可用的时隙配置至少一个恢复通道; 所述节点设备根据所述恢复路径信息向下游节点发送恢复路径建立请 求, 所述恢复路径建立请求中携带所述恢复路径编号。
本发明实施例还提供一种节点设备, 包括:
第一接收单元, 用于接收恢复路径建立请求, 所述恢复路径建立请求中 携带需要恢复的业务对应的恢复路径编号;
第一恢复路径获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第一恢复时隙获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的当前可用的时隙;
第一判断单元, 用于根据所述恢复路径信息判断所述节点设备是否为所 述业务的端节点;
第一通道配置单元, 用于在所述第一判断单元判断所述节点设备不是所 述业务的端节点时, 则根据所述当前可用的时隙配置至少两个恢复通道, 建 立所述至少两个恢复通道的交叉连接;
第一请求消息发送单元, 用于在所述第一判断单元判断所述节点设备不 是所述业务的端节点时, 根据所述恢复路径信息向下游节点发送所述恢复路 径建立请求。
本发明实施例还提供一种节点设备, 包括:
第二接收单元, 用于接收恢复路径建立请求, 所述恢复路径建立请求中 携带需要恢复的业务对应的恢复路径编号;
第二恢复路径获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第二恢复时隙获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的当前可用的时隙;
第二判断单元, 用于根据所述恢复路径信息判断所述节点设备是否为所 述业务的端节点;
第二通道配置单元, 用于在所述第二判断单元判断所述节点设备是所述 业务的端节点时, 才艮据当前可用的时隙配置至少一个恢复通道;
第二请求消息发送单元, 用于在所述第二判断单元判断所述节点设备是 所述业务的端节点时, 根据所述恢复路径信息向相邻节点发送恢复路径建立 请求。
本发明实施例还提供一种节点设备, 包括:
状态获取单元, 用于在检测到业务的工作路径故障后, 获取所述业务的 业务恢复路径的状态信息;
第三恢复路径获取单元, 用于在所述业务恢复路径的状态正常时, 获取 与所述业务对应的恢复路径编号, 根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第三恢复时隙获取单元, 用于在所述业务恢复路径的状态正常时, 根据 所述恢复路径编号获取预置的与所述业务对应的当前可用的时隙资源;
第三通道配置单元, 用于根据所述当前可用的时隙配置至少一个恢复通 道;
第三请求消息发送单元, 用于根据所述恢复路径信息向下游节点发送恢 复路径建立请求, 所述恢复路径建立请求中携带所述恢复路径编号。
本发明实施例还提供一种业务恢复系统, 其包括如上所述的节点设备。 与现有技术中需要在节点之间传送、 解析 Path消息相比, 本发明实施例 中传送的恢复路径建立请求只需要携带恢复路径编号, 而不需要携带恢复路 径信息和恢复时隙信息, 由节点设备根据恢复路径编号直接使用预留的时隙 来恢复业务, 因而可以加快业务恢复速度, 有效节省系统资源。 附图说明
为了更清楚地说明本发明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的前提下, 还可以根据这些附图获得其它的附图。
图 1是现有技术中业务恢复方法的流程示意图;
图 2是本发明实施例一提供的业务恢复方法的流程图;
图 3 是本发明实施例一中根据恢复路径编号获取业务当前可用的时隙的 方法流程图;
图 4是本发明实施例二提供的业务恢复方法的流程图;
图 5是本发明实施例提供的业务恢复方法的应用场景示意图;
图 6是本发明实施例三提供的路径恢复方法的流程示意图;
图 7是本发明实施例四提供的节点设备的结构示意图;
图 8是本发明实施例四提供的节点设备中第一恢复时隙获取单元的结构 示意图;
图 9是本发明实施例五提供的节点设备的结构示意图;
图 10是本发明实施例五提供的节点设备中第二恢复时隙获取单元的结构 示意图;
图 11是本发明实施例六提供的节点设备的结构示意图;
图 12是本发明实施例七提供的业务恢复系统的结构示意图。 具体实施方式
本发明提供了一种业务恢复方法、 系统和节点设备。 为了更好的理解本 发明的技术方案, 下面结合附图对本发明提供的实施例进行详细地描述。 参见图 2, 图 2是本发明实施例一提供的业务恢复方法的流程图。
在本发明实施例中, 若业务当前的工作路径发生故障, 则进行业务恢复, 本发明实施例一提供的业务恢复方法主要包括以下步骤:
Bl、 节点设备接收恢复路径建立请求, 恢复路径建立请求中携带需要恢 复的业务对应的恢复路径编号。
具体的, 节点设备可以接收上游节点设备或网络管理设备发送的恢复路 径建立请求, 恢复路径建立请求中携带需要恢复的业务对应的恢复路径编号, 恢复路径建立请求用于触发业务恢复过程。
在本发明实施例中, 若恢复路径建立请求由源节点发送, 则接收到恢复 路径建立请求的节点设备为中间节点或目的节点。 若恢复路径建立请求由网 络管理设备发送, 则接收到恢复路径建立请求的节点设备可以为源节点、 中 间节点或目的节点。 需要说明的是, 本发明实施例将一条恢复路径上两侧端 部的节点称作端节点, 将恢复路径上除端节点之外的节点称之为中间节点。 本发明实施例中的源节点和目的节点是相对的, 该业务恢复路径上触发业务 恢复过程的端节点为源节点, 该恢复路径上另一个端节点为目的节点。 上述 的上游是指按照从源节点向目的节点传送恢复路径建立请求的先后次序, 前 一传送恢复路径建立请求的节点位于后一传送恢复路径建立请求的节点的上 游。 相对应的, 下游是指按照从源节点向目的节点传送恢复路径建立请求的 先后次序, 后一传送恢复路径建立请求的节点位于前一传送恢复路径建立请 求的节点的下游。 与上述相类似的描述适用于下文的相关内容。
B2、 节点设备根据恢复路径编号获取预置的与业务对应的恢复路径信息 和当前可用的时隙。
具体的, 节点设备可以根据恢复路径建立请求中携带的恢复路径编号来 获取预置的与该业务对应的恢复路径信息和当前可用的时隙。
其中, 节点设备上可以预先配置需要恢复的业务的恢复路径编号和恢复 路径信息之间的对应关系, 进而在接收到恢复路径建立请求后, 根据恢复路 径编号查找到对应的恢复路径信息。
另外, 恢复路径信息中可以包括恢复路径上的所有节点或者仅包括该节 点设备的上游节点和 /或下游节点。 若恢复路径信息仅包括节点设备的上游节 点和 /或下游节点, 则可以节省系统资源, 有效提高查找效率。
B3、节点设备根据恢复路径信息判断本节点设备是否为该业务的端节点。 具体的, 节点设备可以根据获取的恢复路径信息判断节点设备本身是否 为需要恢复的业务的端节点。 若节点设备不是端节点, 即接收到恢复路径建 立请求的节点设备为中间节点, 则执行步骤 B4。 若节点设备为端节点, 则执 行步骤 B5。
B4、 节点设备根据该业务当前可用的时隙, 配置至少两个恢复通道, 建 立至少两个恢复通道的交叉连接, 根据恢复路径信息向下游节点发送恢复路 径建立请求。
具体的, 中间节点可以根据获取的时隙配置至少两个恢复通道, 然后建 立至少两个恢复通道的交叉连接。 其中, 两个恢复通道分别对应该业务的上、 下行方向。
中间节点还根据获取的恢复路径信息向下游节点发送该恢复路径建立请 求, 进而触发下游节点对该业务进行恢复。
若下游节点还是中间节点, 则在接收到恢复路径建立请求后, 执行上述 步骤 B2-B4, 完成该节点上的业务恢复, 最终将恢复路径建立请求传送到目 的节点。 若下游节点是目的节点, 则具体执行过程如下述内容。
B5、 节点设备根据该业务当前可用的时隙, 配置至少一个恢复通道, 根 据恢复路径信息向相邻节点发送恢复路径建立请求。
具体的, 节点设备为端节点存在两种情况。 若节点设备为源节点, 则源 节点接收到的恢复路径建立请求由网络管理系统发送, 源节点则根据该业务 当前可用的时隙, 对该业务配置至少一个恢复通道, 根据该恢复路径信息向 相邻节点 (此时为源节点的下游节点)发送恢复路径建立请求。 若下游节点 是中间节点, 则继续执行步骤 B2-B4, 完成该节点上的业务恢复, 最终将恢 复路径建立请求发送到目的节点。 若下游节点是目的节点, 则具体执行过程 如下述内容。
若节点设备为目的节点, 目的节点接收到由上游节点 (中间节点或者源 节点)发送的恢复路径建立请求, 根据该业务的当前可用的时隙, 配置至少 一个恢复通道, 根据该恢复路径信息向相邻节点 (此时为目的节点的上游节 点)发送恢复路径建立请求。 至此, 目的节点可以通过该恢复通道发送或接 收该业务的业务数据。
其中, 目的节点的相邻节点可以为目的节点的上游节点。 若上游节点是 中间节点, 则中间节点沿着目的节点至源节点的方向将接收到的恢复路径建 立请求逐节点传送到源节点。 若上游节点是源节点, 则源节点直接接收由目 的节点发送的恢复路径建立请求。 最终, 使得源节点可以获知该业务的恢复
路径已经建立完毕, 进而源节点可以通过该恢复通道发送或接收该业务的业 务数据。
与现有技术中需要在节点之间传送、 解析 Path消息相比, 本发明实施例 中传送的恢复路径建立请求只需要携带恢复路径编号, 而不需要携带恢复路 径信息和恢复时隙信息, 由节点设备根据恢复路径编号直接使用预留的时隙 来恢复业务, 因而可以加快业务恢复速度。 另外, 本发明实施在进行路径恢 复时传递的恢复路径建立请求, 恢复路径建立请求只需要携带恢复路径编号, 和现有技术中节点设备需要解析复杂的 Path消息相比, 本发明实施例还可以 有效节省节点设备的系统资源。 参见图 3,图 3是本发明实施例一中根据恢复路径编号获取预置的与该业 务对应的当前可用的时隙的方法流程图。
在本发明实施例中, 网络管理设备或端节点可以预先计算业务的恢复路 径信息和恢复路径的时隙信息, 然后将恢复路径信息和恢复路径的时隙信息 在节点设备上进行配置。 其中, 保护资源信息 (即恢复路径信息和恢复路径 的时隙信息) 的配置过程可以由网络管理设备来实现, 也可以由控制平面的 信令来实现。 在本发明实施例中, 一条业务可以预先配置两个或两个以上的 时隙, 此时上述根据恢复路径编号获取该业务当前可用的时隙 (步骤 B2 ) 的 过程可以包括:
Dl、 根据恢复路径编号查找预置的映射表, 获得对应的保护资源和该业 务的恢复带宽, 保护资源中的时隙的带宽大于或等于恢复带宽。
具体的, 节点设备可以根据恢复路径编号查找预置的映射表获得对应的 保护资源和该业务的恢复带宽, 查找到的保护资源中的时隙的带宽大于或等 于恢复带宽。 其中, 恢复带宽为需要恢复的业务进行业务恢复时所需的带宽。
D2、 从保护资源中获取带宽等于恢复带宽的当前可用的时隙。
具体的, 节点设备从保护资源中获取带宽等于该恢复带宽的当前可用的 时隙, 以便于对需要恢复的业务配置恢复通道, 建立恢复通道的交叉连接。
本发明实施例通过预留带宽较大的时隙, 进而在需要时从保护资源中获 取可用的时隙, 本发明实施例可以增加成功获取可用的时隙的机率, 进而才艮
据获取的时隙对需要恢复的业务快速配置恢复通道, 建立恢复通道的交叉连 接, 从而提高业务恢复的稳定性。 参见图 4, 图 4是本发明实施例二提供的业务恢复方法的流程图。
在本发明实施例二提供的业务恢复方法中, 若业务当前的工作路径发生 故障, 则进行业务恢复, 本发明实施例二提供的业务恢复方法由源节点触发 业务恢复过程, 具体包括:
El、 节点设备在检测到业务的工作路径故障后, 获取该业务的恢复路径 的状态信息。
具体的, 源节点在检测到业务的工作路径故障后, 获取该业务预置的恢 复路径的状态信息。 其中, 恢复路径的状态信息可以包括状态正常、 状态失 效等。 本发明实施例中业务恢复路径状态正常, 则执行步骤 E2。 需要指出的 是, 触发业务恢复过程的节点设备可以为源节点设备, 也可以为目的节点设 备。
E2、 若业务的恢复路径的状态正常, 则节点设备获取与需要恢复的业务 对应的恢复路径编号, 根据恢复路径编号获取预置的与业务对应的恢复路径 信息和当前可用的时隙。
在本发明实施例中, 源节点在业务恢复路径当前的状态为正常时, 获取 需要恢复的业务对应的恢复路径编号, 然后根据该恢复路径编号获取预置的 与该业务对应的当前可用的时隙和恢复路径信息。
其中, 源节点设备上可以预先配置需要恢复的业务的恢复路径编号和恢 复路径信息和当前可用的时隙之间的对应关系, 进而根据恢复路径编号查找 到对应的恢复路径信息。
另外, 恢复路径信息中可以包括恢复路径上的所有节点或者仅包括该节 点设备的上游节点和 /或下游节点, 本发明实施例中可以仅包括源节点的下游 节点, 则可以节省系统资源, 有效提高查找效率。
E3、 节点设备根据当前可用的时隙配置至少一个恢复通道。
具体的, 源节点根据获取的时隙对需要恢复的业务配置至少一个恢复通 道, 以便于利用恢复的通道传送该业务。
E4、 节点设备根据恢复路径信息向下游节点发送恢复路径建立请求, 恢 复路径建立请求中携带恢复路径编号。
具体的, 源节点还根据获取的恢复路径信息向下游节点发送恢复路径建 立请求, 该恢复路径建立请求用于触发下游节点对该业务进行恢复。
其中, 恢复路径建立请求中携带需要恢复的业务对应的恢复路径编号。 下游节点在接收到恢复路径建立请求后, 触发该恢复路径编号对应的业务的 恢复过程。
在本发明实施例二提供的业务恢复方法中, 源节点在业务恢复过程中根 据业务当前可用的时隙配置恢复通道, 从而完成本节点上的业务恢复。 本发 明实施例通过向下游节点发送恢复路径建立请求, 可以触发业务恢复路径上 的除源节点之外的其它节点逐个进行业务恢复, 最终完成业务恢复过程。 与 现有技术中需要在节点之间传送、 解析 Path消息相比, 本发明实施例中传送 的恢复路径建立请求不需要携带恢复路径信息和恢复时隙信息, 节点设备直 接使用预留的时隙来恢复业务, 因而可以加快业务恢复速度, 有效节省系统 资源。
在本发明实施例中, 节点设备在发送恢复路径建立请求时, 可以将恢复 路径建立请求通过光通道传送单元开销或高阶光通道数据单元开销进行传 输。
在本发明实施例二提供的业务恢复方法中, 源节点可以预先计算业务的 恢复路径信息和该业务可用的时隙信息, 然后将恢复路径信息和时隙信息在 节点设备上进行配置。 在本发明实施例中, 一条业务可以预先配置两个或两 个以上的时隙, 此时上述根据恢复路径编号获取业务当前可用的时隙 (步骤 E2 ) 的具体可以为: 根据恢复路径编号查找预置的映射表, 获得对应的保护 资源和该业务的恢复带宽, 保护资源中的时隙的带宽大于或等于该恢复带宽, 然后源节点从保护资源中获取带宽等于恢复带宽的当前可用的时隙, 以便于 对该业务配置恢复通道, 建立恢复通道的交叉连接。
本发明实施例通过预留多个时隙, 即保护资源中的带宽大于或等于该业 务的恢复带宽, 进而在需要时从保护资源中获取业务当前可用的时隙, 本发 明实施例可以增加成功获取可用的时隙的机率, 进而根据获取的时隙对需要
恢复的业务快速配置恢复通道, 建立恢复通道的交叉连接, 从而提高业务恢 复的稳定性。 为更详细的理解本发明实施例, 下面给出本发明实施例的具体应用场景。 参见图 5, 图 5是本发明实施例提供的业务恢复方法的应用场景示意图。 如图 5所示,细线条表示各业务的工作路径,粗管道表示一个 OTU链路, 管道中的粗线条表示 OTU链路中的 1个时隙, 可以用于业务的恢复。
其中,业务 1、业务 2为 ODU0业务,需要占用 1个时隙;业务 3为 ODU1 业务, 需要占用 2个时隙, ODU0业务和 ODU1业务具有不同的带宽, 因此 需要不同的时隙。 业务 1优先级最高, 业务 2次之, 业务 3最低。
源节点或网络管理设备可以预先计算恢复路径信息和恢复路径的时隙。 上述三条业务的恢复路径信息如下:
业务 1 : N1- (时隙 1 ) -N6- (时隙 3 ) -N8- (时隙 5 ) -N2
业务 2: N1- (时隙 2 ) -N6- (时隙 4 ) -N8- (时隙 6 ) -N2
业务 3: N5- (时隙 7/8 ) -N6- (时隙 3/4 ) -N8- (时隙 9/10 ) -N3 源节点或网络管理设备在恢复路径经过的各个节点预先配置恢复信息。 恢复信息包括需要恢复的业务的保护资源、 恢复路径编号和恢复路径信息。 可选的, 恢复信息中还可以包括需要恢复的业务的优先级。 在本应用场景中, 业务 1优先级最高, 业务 2优先级次之, 业务 3优先级最低。 恢复路径信息 为节点设备的上游节点和 /或下游节点。
在配置需要恢复的业务的时隙时, 如果是该节点设备是业务的端节点, 则配置一个维度的时隙; 如果是业务的中间节点, 则配置两个维度的时隙。 上述 "一个维度" 即一个方向的 OTU链路, 上述 "两个维度" 为两个方向的 OTU链路。 例如业务 1在端节点 N1上需配置时隙 1, 业务 1在中间节点 N6 上需要配置时隙 1和时隙 3。
径编号 "P点 资源 径编号 "P点 业务 1 ( ODU0 ) 10 通道 11 时隙 1 1 N6 业务 2 ( ODU0 ) 20 通道 12 时隙 2 2 N6 其中, 节点 N1是业务 1和业务 2的端节点, 只需要在一个维度上配置保 护资源, 因而 N1节点在 2#维度中对业务 1和业务 2配置了保护资源, 并配 置了业务 1和业务 2的恢复路径信息是相邻节点 N6,在 1#维度保存的是业务 1和业务 2的端点信息, 业务 1和业务 2的端点分别为通道 11和通道 12。 业 务 1的优先级(10 ) 高于业务 2的优先级(20 )。
节点 N2配置的恢复信息可以如表 2所示:
表 2
其中, 节点 N2是业务 1和业务 2的端节点, 只需要在一个维度上配置保 护资源, 因而 N2在 2#维度中对业务 1和业务 2配置了时隙资源, 并配置了 业务 1和业务 2的恢复路径信息是相邻节点 N8,在 1#维度保存的是业务 1和 业务 2的端点信息, 业务 1和业务 2的端点分别为通道 21和通道 22。 业务 1 的优先级(10 ) 高于业务 2的优先级(20 )。
节点 N3配置的恢复信息如表 3所示:
表 3
编号 业务 3( ODU1 ) 30 通道 33 时隙 9/10 3 N8 其中, 节点 N3是业务 3的端节点, 只需要在一个维度上配置保护资源, 因而 N3在 2#维度中对业务 3配置了时隙资源, 并配置了业务 3的恢复路径 信息是相邻节点 N8, 在 1#维度保存的是业务 3的端点信息, 业务 3的端点为 通道 33。 业务 3的优先级(30 )低于业务 1、 业务 2的优先级。
节点 N5配置的恢复信息如表 4所示。
表 4
其中, 节点 N5是业务 3的端节点, 只需要在一个维度上配置保护资源, 因而 N5在 2#维度中对业务 3配置了时隙资源, 并配置了业务 3的恢复路径 信息是相邻节点 N6, 在 1#维度保存的是业务 3的端点信息, 业务 3的端点为 通道 53。 业务 3的优先级(30 )低于业务 1、 业务 2的优先级。
节点 N6配置的恢复信息如表 5所
其中,节点 N6是中间节点,从两个维度进行配置。在 1#维度中对业务 1、 业务 2和业务 3分别配置了时隙资源, 并配置了业务 1、 业务 2和业务 3的恢 复路径信息分别是相邻节点 Nl、 N1和 N5; 在 2#维度中配置的是保护资源为 保护组 10, 保护组 10中的时隙资源由业务 1、 业务 2和业务 3共享, 并配置 了业务 1、 业务 2和业务 3的恢复路径信息是相邻节点 N8。保护组 10中包括
时隙 3和时隙 4, 还可以包括更多的时隙。 业务 1的优先级(10 ) 高于业务 2 的优先级( 20 )。 业务 3的优先级( 30 )低于业务 1、 业务 2的优先级。
节点 N8配置的恢复信息如表 6所示。
表 6
其中,节点 N8是中间节点,从两个维度进行配置。在 1#维度中对业务 1、 业务 2和业务 3分别配置了时隙资源, 并配置了业务 1、 业务 2和业务 3的恢 复路径信息分别是相邻节点 N2、 N2和 N3; 在 2#维度中配置的是保护资源为 保护组 10, 保护组 10中的时隙资源由业务 1、 业务 2和业务 3共享, 并配置 了业务 1、 业务 2和业务 3的恢复路径信息是相邻节点 N6。保护资源 10中包 括时隙 3和时隙 4, 还可以包括更多的时隙。 业务 1的优先级(10 )高于业务 2的优先级( 20 )。 业务 3的优先级( 30 )低于业务 1、 业务 2的优先级。 参见图 6, 图 6是本发明实施例三提供的路径恢复方法的流程图。
本发明实施例提供的方法基于上述应用场景, 并且在本应用场景中, 预 先定义恢复消息的格式。 恢复消息格式如下:
消息类型 恢复路径编号 其中, 节点设备可以利用 OTU开销或者高阶 ODU的开销来传送上述恢复 消息, 例如可以采用 1个或多个预留 (Reserve , RES )字节开销, 或自动保护 倒换 ( Automatic Protection Switching, APS )或保护通信通道 ( Protection Communication Channel, PCC )开销等。 本发明实施例定义的恢复消息的结 构较简单, 可以有效节省设备的系统资源。
本发明实施例在传送上述消息的过程中, 可以采用简单的高级数据链路
控制 ( High-Level Data Link Control, HDLC )格式封装, 用于消息的发送与 接收, 此时恢复消息封装格式如下:
HDLC封装 消息类型 恢复路径编号 当然,恢复消息也可以采用 IP封装,此时恢复消息可以采用控制通道传送 (控制通道可以用 OTU/ODU的开销实现, 也可以利用 OTU之外的控制通道实 现, 例如节点间的以太网链路), 恢复消息封装格式如下:
本应用场景中定义以下恢复消息类型:
和上述消息类型相对应, 业务恢复路径的状态包括:
1)正常;
2)低优先级业务占用;
3)信号降级;
4)高优先级业务占用;
5)失效。
假设初始时保护资源状态正常; 某时刻 N3与 N8之间的 OTU链路发生 故障,导致失效,即时隙 9/10失效,由于业务 3的恢复路径需要用到时隙 9/10,
因此业务 3的两个端点需要能知道该故障, 并将业务 3的恢复路径状态更新 为 "失效",此时将禁止业务 3 自动触发恢复过程, 即业务 3工作路径故障时, 禁止建立恢复路径。
N3与 N8之间的 OTU链路发生故障时,链路两端的节点可以检测到该故 障, 即 N3、 N8可以检测到该故障。 此时 N3查找恢复信息 (上述表 3 ), 发 现为业务 3配置了失效 OTU链路中的时隙, 并且 N3是业务 3的端点, 因此 将业务 3的恢复路径状态更新为 "失效"。
业务 3的另一个端点 N5发现业务 3恢复路径失效的方法如下:
1) N8检测到 OTU链路失效, 查找恢复信息 (上述表 6 ), 发现为业务 3 的恢复路径配置了失效 OTU链路中的时隙, 并且 N8不是业务 3的端点, 因 此利用 N8和 N6之间的开销, 或者是控制通道, 发送业务 3的 "恢复路径建 立请求" 消息 (消息类型 = 5, 恢复路径编号 = 3 )到 N6。
2) N6收到来自 N8的业务 3的 "恢复路径建立请求" 消息(表 5中的 2# 维度), 根据接收到的业务 3的恢复路径建立请求, 以及时隙 3、 4的状态, 或其对应的 OTU链路的目前状态(状态为 "正常"), 选择最坏的状态(恢复 路径状态失效)发往另一维度(表 5中的 1#维度); 即查找 N6的恢复信息(表 5 ), 利用 N6和 N5之间的开销, 或者是控制通道, 发送业务 3的 "恢复路径 建立请求" 消息 (消息类型 = 5, 恢复路径编号 = 1 )。
3) N5收到来自 N6的业务 3的 "恢复路径建立请求" 消息, 查找 N5的 恢复信息 (上述表 4 ), 发现自己是业务 3的端点, 根据接收到的业务 3的恢 复路径状态消息, 以及时隙 7、 8的状态, 或其对应的 OTU链路的目前状态
(状态为 "正常"), 选择最坏的状态作为业务 3 的恢复路径状态 (恢复路径 状态失效)。
在上述步骤中, 节点设备需要根据接收到的恢复路径状态消息, 以及消 息关联的业务的恢复路径的当前状态, 选择最坏的状态发往下一个节点, 一 直传送到端节点。 这样端节点可以获取最坏的保护资源状态作为其恢复路径 的状态信息。 其中, 状态可以按照以下顺序由坏到好排列: 失效, 被高优先 级业务占用, 信号降级, 被低优先级业务占用, 正常。
在本应用场景中, 业务端点维护的恢复路径状态的结果可以如下:
1)恢复路径中, 只要有一个区段的资源失效, 则该恢复路径状态为 "失 效,,;
2)否则, 只要有一个区段的资源被高优先级业务占用, 则该恢复路径状 态为 "被高优先级业务占用";
3)否则, 只要有一个区段的资源信号降级, 则该恢复路径状态为 "信号 降级";
4)否则, 只要有一个区段的资源被低优先级业务占用, 则该恢复路径状 态为 "被低优先级业务占用";
5)否则, 恢复路径状态为 "正常"。
需要指出的是, 上述状态定义是一个较优的例子, 也可以有其它状态定 义方法, 例如不需要信号降级的状态。
在本应用场景中, 若业务 1 的工作路径发生故障, 需要触发业务的恢复 过程。 如图 6所示, 本发明实施例三提高的业务恢复过程包括:
51、节点 N1在检测到业务的工作路径故障后, 获取业务恢复路径的状态 信息。
具体的, 源节点 (节点 N1 )获取业务 1的业务恢复路径的状态信息。 本 发明实施例中业务恢复路径的状态为正常, 则执行步骤 S2。
52、节点 N1获取与业务 1对应的恢复路径编号,根据恢复路径编号获取 预置的与业务 1对应的恢复路径信息和当前可用的时隙。
具体的, 节点 N1可以查找上述表 1, 获得业务 1当前可用的时隙为时隙 1以及业务 1的恢复路径信息。 此时, 业务 1的恢复路径信息为节点 N6, 节 点 N6即为恢复路径上节点 N1的下游节点。
53、 节点 N1根据获取的时隙对业务 1配置一个恢复通道, 向节点 N6发 送恢复路径建立请求。
具体的, 节点 N1将获取的时隙(时隙 1 )配置为一个 ODU0通道, 将业务 1 利用该 ODU0通道传送, 并向下游节点(节点 N6 )发送恢复路径建立请求, 触 发 N6进行业务恢复过程。 其中, 该恢复路径建立请求中携带的恢复路径编号 为 1, 表明业务 1需要恢复。
54、节点 N6接收恢复路径建立请求,根据恢复路径编号获取业务 1对应
的恢复路径信息和当前可用的时隙。
具体的, 节点 N6根据 N1发送的恢复路径建立请求( 1#维度) 中的恢复 路径编号 1、 发送恢复路径建立请求的节点 (节点 N1 )来查找表 5, 得知 1# 维度分配给业务 1使用的保护资源为时隙 1, 2#维度分配给业务 1使用的时隙 为保护组 10, 由于保护组 10中所有时隙状态正常, 没有业务占用, 因此从保 护组 10中选择编号最小的时隙 (时隙 3 )作为业务 1在 2#维度可用的时隙。
其中, 本发明实施例还可以预置保护资源中的时隙选择规则, 例如按照 业务优先级从高到低, 选择时隙编号从小到大的时隙; 或者按照业务优先级 从低到高, 选择时隙编号从小到大的时隙。 预置保护资源中的时隙选择规则 可以使得相邻的节点设备之间不需要协商确定如何选择时隙, 可以进一步加 快业务恢复速度。
另夕卜,节点 N6还根据恢复路径编号查找表 5来获得业务 1的恢复路径信 息, 此时恢复路径信息中包括多个相邻节点 (Nl、 N8 )。
55、 节点 N6根据恢复路径信息判断节点本身是否为业务 1的端节点。 在本发明实施例中, 节点 N6存在上游节点 N1和下游节点 N8, 则说明 节点 N6不是端节点, 执行步骤 S6。
56、 节点 N6对业务 1配置两个恢复通道, 建立交叉连接。
具体的,节点 N6配置时隙 1和时隙 3分别为 ODU0通道,并建立这两个 ODU0通道的交叉连接, 从而节点 N6实现业务恢复。
S7、 节点 N6向节点 N8发送恢复路径建立请求, 向节点 N5发送恢复路 径被高优先级业务占用消息。
具体的, 节点 N6利用 N1和 N6之间的开销或控制通道, 向业务 1恢复 路径上的下游节点 N8发送恢复路径建立请求,触发节点 N8的业务恢复过程。
此时, 时隙 3被业务 1 占用, 并且时隙 3也被业务 3共享, 业务 1的优 先级高于业务 3的优先级, 因此节点 N6更新业务 3的恢复路径状态, 即利用 N6与 N5之间的开销, 或控制通道, 发送业务 3的 "恢复路径被高优先级业 务占用" 消息 (消息类型 = 4, 恢复路径编号 = 3 )给 N5。 N5收到该消息, 更新业务 3恢复路径状态为 "被高优先级业务占用"。
其中, 时隙 3也被业务 2共享, 但是业务 2只需占用一个时隙, 而且还 有时隙 4可用, 因此业务 2的恢复路径状态不变。
58、节点 N8接收恢复路径建立请求,根据恢复路径编号获取业务 1的恢 复路径信息和当前可用的时隙。
具体的, 节点 N8接收 N6发送的恢复路径建立请求(2#维度), 根据恢 复路径编号 1查找上述表 6, 获得 1#维度分配给业务 1使用的保护资源为时 隙 5, 2#维度分配给业务 1使用的保护资源为保护组 10, 由于保护组 10中所 有时隙状态正常,没有业务占用,因此从保护组 10中选择编号最小的时隙(时 隙 3 )作为业务 1在 2#维度的保护资源。
节点 N8根据恢复路径编号获取业务 1的恢复路径信息。 此时, 业务 1的 恢复路径信息中包括多个相邻节点 (N6、 N2 )。
59、 节点 N8根据恢复路径信息判断节点本身是否为业务 1的端节点。 在本发明实施例中, 节点 N8存在上游节点 N6以及下游节点 N2, 则说 明节点 N8不是端节点, 执行步骤 S10。
510、 节点 N8对业务 1配置两个恢复通道, 建立交叉连接。
具体的,节点 N8配置时隙 5和时隙 3分别为 ODU0通道,并建立这两个 ODU0通道的交叉连接, 从而节点 N8实现业务恢复。
511、 节点 N8向节点 N2发送恢复路径建立请求, 向节点 N3发送恢复路 径被高优先级业务占用消息。
具体的, 节点 N8利用 N2和 N8之间的开销或控制通道, 向业务 1恢复 路径上的下游节点 N2发送恢复路径建立请求,触发节点 N2的业务恢复过程。
此时, 时隙 3被业务 1 占用。 由于时隙 3也被业务 3共享, 而且业务 1 的优先级高于业务 3的优先级, 因此根据上一个实施例的规则, N8更新业务 3的恢复路径状态, 即利用 N8与 N3之间的开销, 或控制通道, 发送业务 3 的 "恢复路径被高优先级业务占用"消息(消息类型 = 4, 恢复路径编号 = 3 ) 给节点 N3。 节点 N3收到该消息, 更新业务 3恢复路径状态为 "被高优先级 业务占用"。
需要指出的是, 时隙 3也被业务 2共享, 但是业务 2只需占用一个时隙, 而且还有时隙 4可用, 因此业务 2的恢复路径状态不变。
512、 节点 N2接收恢复路径建立请求, 根据恢复路径编号获取业务 1的 恢复路径信息和当前可用的时隙。
具体的, 节点 N2接收节点 N8发送的恢复路径建立请求, 根据恢复路径 编号查找上述表 2,获得业务 1当前可用的时隙为时隙 5以及业务 1的恢复路 径信息。 此时, 业务 1的恢复路径信息为节点 N8, 节点 N8即为恢复路径上 节点 N2的上游节点。
513、 节点 N2根据恢复路径信息判断节点本身是否为业务 1的端节点。 在本发明实施例中, 节点 N2只存在上游节点 N8, 则说明节点 N2是端 节点, 执行步骤 S14。
514、 节点 N2才艮据时隙对业务 1配置恢复通道。
具体的, 节点 N2将时隙 5配置为一个 ODU0通道, 从该 ODU0通道接 收业务数据, 以及利用该 ODU0通道传送业务 1, 从而实现目的节点上的业 务恢复。
S 15、 节点 N2向节点 N8发送恢复路径建立请求。
具体的, 节点 N2根据恢复路径信息向相邻节点, 即上游节点 N8, 返回 业务 1的恢复路径建立请求。
节点 N8在接收到恢复路径建立请求后,发现业务 1的恢复路径已经建立, 则将接收到恢复路径建立请求转发给上游节点 N6, 最终 N1收到业务 1的恢 复路径建立请求, 发现业务 1的恢复路径已经建立, N1可以从 ODU0通道发 送或接收业务数据, 至此业务 1的恢复过程完成。
在本应用场景中, 若业务 1的端节点 (Nl、 N2 ) 同时检测到业务 1工作 路径失效的情况下, N 1、 N2可以同时发起业务恢复过程, 即端节点 N 1和 N2 均向相邻节点发送恢复路径建立请求, 中间节点处理恢复路径建立请求的过 程参见上述步骤 S4-S11中的中间节点的处理过程,在此不再赘述。端节点 N1 和 N2在接收到对方发送的恢复路径建立请求后,最终完成业务 1的路径恢复。 与节点 N1或 N2单独发送恢复路径建立请求相比, 两端节点分别进行业务恢 复可以进一步加快业务恢复速度。
以上对本发明实施例提供的业务恢复方法进行了详细描述, 下面再给出 和上述方法实施例对应的装置。
参见图 7, 图 7是本发明实施例四提供的节点设备的结构示意图。
本发明节点设备实施例四提供的节点设备包括:
第一接收单元 110, 用于接收恢复路径建立请求, 恢复路径建立请求中携 带需要恢复的业务对应的恢复路径编号;
第一恢复路径获取单元 120,用于根据恢复路径编号获取预置的与业务对 应的恢复路径信息;
第一恢复时隙获取单元 130,用于根据恢复路径编号获取预置的与业务对 应的当前可用的时隙;
第一判断单元 140,用于根据恢复路径信息判断节点设备是否为该业务的 端节点;
第一通道配置单元 150,用于在第一判断单元 140判断节点设备不是该业 务的端节点时, 则才艮据当前可用的时隙配置至少两个恢复通道, 建立至少两 个恢复通道的交叉连接;
第一请求消息发送单元 160,用于在第一判断单元 140判断节点设备不是 该业务的端节点时, 根据恢复路径信息向下游节点发送恢复路径建立请求。
本发明实施例四提供的节点设备可以使用在前述相对应的业务恢复方法 第一实施例中, 详细过程参见上述方法实施例, 在此不再重复描述。
参见图 8,图 8是本发明实施例四提供的节点设备中第一恢复时隙获取单 元的结构示意图。
在本发明实施例中, 节点设备中第一恢复时隙获取单元 130具体可以包 括:
第一查找模块 131,用于根据恢复路径编号查找预置的映射表获得对应的 保护资源和业务的恢复带宽, 保护资源中的时隙的带宽大于或等于恢复带宽; 第一获取模块 132,用于从保护资源中获取带宽等于恢复带宽的当前可用 的时隙。
本发明实施例提供的节点设备通过预留多个时隙, 进而在需要时从保护 资源中获取带宽满足要求的可用时隙, 本发明实施例可以增加成功获取可用 的时隙的机率, 进而根据获取的时隙快速建立恢复通道, 从而提高业务恢复 的稳定性。
参见图 9, 图 9是本发明实施例五提供的节点设备的结构示意图。
本发明节点设备实施例五提供的节点设备包括:
第二接收单元 210, 用于接收恢复路径建立请求, 恢复路径建立请求中携 带需要恢复的业务对应的恢复路径编号;
第二恢复路径获取单元 220,用于根据恢复路径编号获取预置的与业务对 应的恢复路径信息;
第二恢复时隙获取单元 230,用于根据恢复路径编号获取预置的与业务对 应的当前可用的时隙;
第二判断单元 240,用于根据恢复路径信息判断节点设备是否为业务的端 节点;
第二通道配置单元 250,用于在第二判断单元判断节点设备是该业务的端 节点时, 才艮据当前可用的时隙配置至少一个恢复通道;
第二请求消息发送单元 260,用于在第二判断单元 240判断节点设备为端 节点时, 根据恢复路径信息向相邻节点发送恢复路径建立请求。
本发明实施例五提供的节点设备可以使用在前述相对应的业务恢复方法 第一实施例中, 详细过程参见上述方法实施例, 在此不再重复描述。
参见图 10,图 10是本发明实施例五提供的节点设备中第二恢复时隙获取 单元的结构示意图。
在本发明实施例五提供的节点设备中, 第二恢复时隙获取单元 230具体 可以包括:
第二查找模块 231,用于根据恢复路径编号查找预置的映射表获得对应的 保护资源和业务的恢复带宽, 保护资源中的时隙的带宽大于或等于恢复带宽; 第二获取模块 232,用于从保护资源中获取带宽等于恢复带宽的当前可用 的时隙。
参见图 11, 图 11是本发明实施例六提供的节点设备的结构示意图。
本发明实施例六提供的节点设备主要包括:
状态获取单元 310, 用于在检测到业务的工作路径故障后, 获取该业务的 业务恢复路径的状态信息;
第三恢复路径获取单元 320, 用于在业务恢复路径的状态正常时, 获取与 该业务对应的恢复路径编号, 根据恢复路径编号获取预置的与该业务对应的 恢复路径信息;
第三恢复时隙获取单元 330, 用于在业务恢复路径的状态正常时,根据恢 复路径编号获取预置的与该业务对应的当前可用的时隙资源;
第三通道配置单元 340, 用于根据当前可用的时隙配置至少一个恢复通 道;
第三请求消息发送单元 350,用于根据恢复路径信息向下游节点发送恢复 路径建立请求, 恢复路径建立请求中携带恢复路径编号。
本发明实施例六提供的节点设备可以使用在前述相对应的业务恢复方法 第二实施例中, 详细过程参见上述方法实施例, 在此不再重复描述。
在本发明实施例六提供的节点设备中, 第三恢复时隙获取单元 330具体 可以包括:
第三查找模块, 用于根据恢复路径编号查找预置的映射表获得对应的保 护资源和业务的恢复带宽, 保护资源中的时隙的带宽大于或等于恢复带宽; 第三获取模块, 用于从保护资源中获取带宽等于恢复带宽的当前可用的 时隙。
以上对本发明实施例提供的节点设备进行了详细介绍, 本发明实施例还 提供和装置实施例对应的业务恢复系统。
参见图 12, 图 12是本发明实施例七提供的业务恢复系统的结构示意图。 本发明实施例七提供的业务恢复系统包括第一节点设备 300和第二节点 设备 400,其中第一节点设备 300的具体结构和上述实施例四提供的节点设备 相同, 详情参见上述实施例四。 第二节点设备 400 的具体结构和上述实施例 五、 六提供的节点设备相同, 详情参见上述实施例五和实施例六, 在此不再 重复描述。
需要说明的是, 上述装置和系统内的各单元之间的信息交互、 执行过程 等内容, 由于与本发明方法实施例基于同一构思, 具体内容可参见本发明方 法实施例中的叙述, 此处均不再重复描述。
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, 的程序可存储于计算 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, 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。
以上对本发明实施例提供的业务恢复方法、 节点设备以及业务恢复系统 进行了详细介绍, 对于本领域的一般技术人员, 依据本发明实施例的思想, 在具体实施方式及应用范围上均会有改变之处, 本说明书内容不应理解为对 本发明的限制。
Claims
1、 一种业务恢复方法, 其特征在于, 包括:
节点设备接收恢复路径建立请求, 所述恢复路径建立请求中携带需要恢 复的业务对应的恢复路径编号;
所述节点设备根据所述恢复路径编号获取预置于所述节点设备的与所述 业务对应的恢复路径信息和当前可用的时隙;
所述节点设备根据所述当前可用的时隙配置至少一个恢复通道, 根据所 述恢复路径信息向相邻节点发送恢复路径建立请求。
2、 根据权利要求 1所述的方法, 其特征在于, 所述节点设备获得所述回 复路径信息后, 根据所述恢复路径信息判断所述节点设备是否为所述业务的 端节点;
若所述节点设备不是所述业务的端节点, 则所述节点设备根据所述当前 可用的时隙配置至少两个恢复通道, 建立所述至少两个恢复通道的交叉连接。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述根据所述恢复路 径编号获取预置于所述节点设备的与所述业务对应的当前可用的时隙, 具体 包括:
根据所述恢复路径编号查找预置的映射表获得所述恢复路径编号对应的 保护资源和所述业务的恢复带宽, 所述保护资源中的时隙的带宽大于或等于 所述恢复带宽, 该映射表包括所述恢复路径编号以及所述保护资源和所述业 务的恢复带宽;
从所述保护资源中获取带宽等于所述恢复带宽的当前可用的时隙。
4、 根据权利要求 1或 2或 3所述的方法, 其特征在于,
所述恢复路径信息包括恢复路径上的所有节点。
5、 根据权利要求 1或 2或 3所述的方法, 其特征在于,
所述恢复路径信息包括所述节点设备的上游节点和 /或下游节点。
6、 根据权利要求 1或 2或 3所述的方法, 其特征在于,
所述恢复路径建立请求通过光通道传送单元开销或高阶光通道数据单元 开销进行传输。
7、 一种业务恢复方法, 其特征在于, 包括: 节点设备在检测到业务的业务工作路径故障后, 获取所述业务的业务恢 复路径的状态信息;
若所述业务恢复路径的状态正常, 则所述节点设备获取与所述业务对应 的恢复路径编号, 根据所述恢复路径编号获取预置于所述节点设备的与所述 业务对应的恢复路径信息和当前可用的时隙;
所述节点设备根据所述当前可用的时隙配置至少一个恢复通道; 所述节点设备根据所述恢复路径信息向下游节点发送恢复路径建立请 求, 所述恢复路径建立请求中携带所述恢复路径编号。
8、 根据权利要求 7所述的方法, 其特征在于, 所述获取预置的与所述业 务对应的当前可用的时隙, 具体包括:
根据所述恢复路径编号查找预置的映射表获得对应的保护资源和所述业 务的恢复带宽, 所述保护资源中的时隙的带宽大于或等于所述恢复带宽, 该 映射表包括所述恢复路径编号以及所述保护资源和所述业务的恢复带宽; 从所述保护资源中获取带宽等于所述恢复带宽的当前可用的时隙。
9、 根据权利要求 7或 8所述的方法, 其特征在于,
所述恢复路径信息包括恢复路径上的所有节点; 或者,
所述恢复路径信息包括所述节点设备的上游节点和 /或下游节点。
10、 根据权利要求 7或 8所述的方法, 其特征在于,
所述恢复路径建立请求通过光通道传送单元开销或高阶光通道数据单元 开销进行传输。
11、 一种节点设备, 其特征在于, 包括:
第一接收单元, 用于接收恢复路径建立请求, 所述恢复路径建立请求中 携带需要恢复的业务对应的恢复路径编号;
第一恢复路径获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第一恢复时隙获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的当前可用的时隙;
第一判断单元, 用于根据所述恢复路径信息判断所述节点设备是否为所 述业务的端节点; 第一通道配置单元, 用于在所述第一判断单元判断所述节点设备不是所 述业务的端节点时, 则根据所述当前可用的时隙配置至少两个恢复通道, 建 立所述至少两个恢复通道的交叉连接;
第一请求消息发送单元, 用于在所述第一判断单元判断所述节点设备不 是所述业务的端节点时, 根据所述恢复路径信息向下游节点发送所述恢复路 径建立请求。
12、 根据权利要求 11所述的节点设备, 其特征在于, 所述第一恢复时隙 获取单元包括:
第一查找模块, 用于根据所述恢复路径编号查找预置的映射表获得对应 的保护资源和所述业务的恢复带宽, 所述保护资源中的时隙的带宽大于或等 于所述恢复带宽, 该映射表包括所述恢复路径编号、 所述保护资源和所述业 务的恢复带宽的对应关系;
第一获取模块, 用于从所述保护资源中获取带宽等于所述恢复带宽的当 前可用的时隙。
13、 一种节点设备, 其特征在于, 包括:
第二接收单元, 用于接收恢复路径建立请求, 所述恢复路径建立请求中 携带需要恢复的业务对应的恢复路径编号;
第二恢复路径获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第二恢复时隙获取单元, 用于根据所述恢复路径编号获取预置的与所述 业务对应的当前可用的时隙;
第二判断单元, 用于根据所述恢复路径信息判断所述节点设备是否为所 述业务的端节点;
第二通道配置单元, 用于在所述第二判断单元判断所述节点设备是所述 业务的端节点时, 才艮据当前可用的时隙配置至少一个恢复通道;
第二请求消息发送单元, 用于在所述第二判断单元判断所述节点设备是 所述业务的端节点时, 根据所述恢复路径信息向相邻节点发送恢复路径建立 请求。
14、 根据权利要求 13所述的节点设备, 其特征在于, 所述第二恢复时隙 获取单元包括:
第二查找模块, 用于根据所述恢复路径编号查找预置的映射表获得对应 的保护资源和所述业务的恢复带宽, 所述保护资源中的时隙的带宽大于或等 于所述恢复带宽;
第二获取模块, 用于从所述保护资源中获取带宽等于所述恢复带宽的当 前可用的时隙。
15、 一种节点设备, 其特征在于, 包括:
状态获取单元, 用于在检测到业务的工作路径故障后, 获取所述业务的 业务恢复路径的状态信息;
第三恢复路径获取单元, 用于在所述业务恢复路径的状态正常时, 获取 与所述业务对应的恢复路径编号, 根据所述恢复路径编号获取预置的与所述 业务对应的恢复路径信息;
第三恢复时隙获取单元, 用于在所述业务恢复路径的状态正常时, 根据 所述恢复路径编号获取预置的与所述业务对应的当前可用的时隙资源;
第三通道配置单元, 用于根据所述当前可用的时隙配置至少一个恢复通 道;
第三请求消息发送单元, 用于根据所述恢复路径信息向下游节点发送恢 复路径建立请求, 所述恢复路径建立请求中携带所述恢复路径编号。
16、 根据权利要求 15所述的节点设备, 其特征在于, 所述第三恢复时隙 获取单元包括:
第三查找模块, 用于根据所述恢复路径编号查找预置的映射表获得对应 的保护资源和所述业务的恢复带宽, 所述保护资源中的时隙的带宽大于或等 于所述恢复带宽;
第三获取模块, 用于从所述保护资源中获取带宽等于所述恢复带宽的当 前可用的时隙。
17、 一种业务恢复系统, 其特征在于, 包括:
如权利要求 11或 12所述的节点设备以及如权利要求 13到 16任一项所述 的节点设备。
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