WO2012100711A1 - 一种应用层信令路由保护方法、设备、计算机程序和存储介质 - Google Patents

一种应用层信令路由保护方法、设备、计算机程序和存储介质 Download PDF

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Publication number
WO2012100711A1
WO2012100711A1 PCT/CN2012/070576 CN2012070576W WO2012100711A1 WO 2012100711 A1 WO2012100711 A1 WO 2012100711A1 CN 2012070576 W CN2012070576 W CN 2012070576W WO 2012100711 A1 WO2012100711 A1 WO 2012100711A1
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node
signaling
route
routing
signaling node
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PCT/CN2012/070576
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English (en)
French (fr)
Inventor
陈旭
李凯
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中国移动通信集团公司
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Publication of WO2012100711A1 publication Critical patent/WO2012100711A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/40Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a benefit protection method
  • S ⁇ System Architecture Evolution
  • the MME Mobile Management Entity
  • HSS Home Subscriber Server
  • the signaling protocol stack is Diameter/SCTP (Stream Control Transmission Protocol) / IP (Internet Protocol, Internet Protocol).
  • the UTE user in an HSS can roam to any MME network element in the entire network, that is, the user in one MME may belong to any HSS in the entire network, so that there is a full connection between the entire network MME and the entire network HSS.
  • the DIA Diameter Routing Agent
  • All the signaling between the MME and the HSS is transferred through the DRA to avoid the entire network. Data configuration maintenance problem.
  • FIG. 2 The schematic diagram of the network system using DRA in the prior art is shown in FIG. 2 . among them:
  • the Diameter node such as MME and HSS can be regarded as the source node or destination node of Diameter signaling, and supports the Diameter/SCTPZIP protocol stack.
  • the DBU protocol layer of the source/destination node performs interface signaling process processing such as location update, and Diameter signaling addressing and routing.
  • Diameter signaling addressing mode specifically includes IMSI
  • the source node When using IMSI addressing and domain name addressing, the source node does not know the host name of the destination node. When using host name addressing, the source node must know the master of the destination node. Machine name.
  • the D meter protocol does not specify the signaling routing mode. It only describes the active and standby routes and the load sharing routing mode.
  • the Diameter protocol does not define a routing mechanism. The Diameter node does not record, does not detect, and does not pass the signaling routing status of a destination node (whether it is reachable).
  • the DRA can be regarded as a relay node of Diameter signaling, and also supports Diameter/SCTP/IP. Among them, the Diameter node of the relay node does not perform interface signaling process processing, and only performs Diameter signaling addressing and routing.
  • the relay node supports IMSI addressing, domain name addressing, and host name addressing. When using IMSI addressing and domain name addressing, the relay node needs to complete address translation and translate the IMSI and domain name into the destination host name. When addressing, the relay node only needs to complete the signaling transfer.
  • the relay node can also adopt the primary and backup routes and the load sharing routing mode. The relay node also does not record, detect, or pass the signaling routing status of a destination node (whether reachable).
  • the source node selects one signaling message to send one signaling connection to one DRA according to the routing algorithm, and routes the signaling message through the signaling tandem layer formed by the DRA node. Go to the destination node.
  • a certain DRA node in the signaling tandem layer receives the signaling message, it detects that the SCTP signaling connection with the next hop DRA node is interrupted, and the message cannot be sent. The node will go up the hop node. Returns an error response telling it that the message could not be delivered to its destination. After receiving the error response, the previous hop node checks whether there are other routes (alternate routes or other routes for load sharing) for the message. If yes, the other routes will be selected to resend the message.
  • the node does not record the route that the message cannot be delivered, and does not directly select the retransmission route of the sent message for the subsequent received message. Therefore, the process of implementing the present invention is still possible for the subsequent received message from the undeliverable path.
  • the inventor has found that the prior art has at least the following problems:
  • the above-mentioned Diameter signaling routing mechanism has a protection mechanism for a signaling message. When the set primary route is unreachable, it can select another route to resend. However, there is no route protection mechanism for subsequent messages. This is a feature of the D meter protocol as an application layer protocol for message routing.
  • An object of the present invention is to provide an application layer signaling routing protection method, a device, a computer program, and a storage medium, to implement timely detection of a routing state, and to reduce message delay caused by error retransmission.
  • the example uses the following technical solutions:
  • An application layer signaling route protection method includes the following steps:
  • the signaling node detects the connection status between itself and each adjacent signaling node
  • the signaling node When the signaling node detects that the connection between itself and the at least one adjacent signaling node fails, the signaling node records the routing state of each of the routes including the faulty connection stored by itself as Unreachable;
  • the signaling node If the signaling node is a transit node, the signaling node respectively determines whether there is a replacement route for each route that includes the faulty connection stored by the signaling node;
  • the signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, where the routing status notification message indicates that the signaling node and the destination node that does not have a replacement route The route between the two is unreachable.
  • a signaling node comprising:
  • a storage module configured to store routing information corresponding to the signaling node
  • a detecting module configured to detect a connection state between the signaling node and each adjacent signaling node
  • a recording module configured to: when the detecting module detects the signaling node and at least one adjacent signaling node When the connection between the faults occurs, the routing state of each route including the faulty connection stored by the storage module is recorded as unreachable;
  • a judging module configured to determine, when the signaling node is a transit node, whether there is a replacement route for each route that includes the faulty connection stored by the storage module;
  • a broadcast module configured to: when the judgment result of the determining module is non-existent, broadcast a routing state notification message to each adjacent signaling node of the signaling node, where the routing state notification message indicates the signaling node and The route between the destination nodes of the route that does not have a replacement route is unreachable.
  • a computer program comprising instructions arranged, when executed by a processor, to cause said processor to perform said application layer signaling routing protection method as described above.
  • the technical solution proposed by the embodiment of the present invention has the following advantages: By applying the technical solution proposed by the embodiment of the present invention, the state of the connection between the adjacent signaling nodes by the signaling node Detection, timely detection of connection failures, and in the event of a failure, the corresponding record and notification mechanism is applied, so that each relevant signaling node can accurately obtain routing state information and select an alternate route, thereby enabling the signaling node to perform a signal When the message is forwarded, the reachable route can be used to forward the signaling message according to the accurate routing state information, which solves the problem of invalid transmission and message delay caused by the existing routing mechanism, and avoids bandwidth waste and impact on the upper layer service. . DRAWINGS
  • FIG. 1 is a schematic structural diagram of a SAE network in the prior art
  • FIG. 2 is a schematic diagram of a network structure of a DRA applied in the prior art
  • FIG. 3 is a schematic flow chart of an application layer signaling route protection method according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of an application layer signaling route protection method in a fault recovery detection process according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a processing procedure of an application layer signaling route protection method after receiving a route state notification message according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a specific application scenario of an application layer signaling routing protection method according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a specific application scenario of an application layer signaling routing protection method according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a specific application scenario of an application layer signaling route protection method according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram of a specific application scenario of an application layer signaling routing protection method according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a signaling node according to an embodiment of the present invention.
  • FIG. 3 it is a schematic flowchart of an application layer signaling route protection method according to an embodiment of the present invention, which specifically includes the following steps:
  • Step S30 The signaling node detects the connection status between itself and each adjacent signaling node.
  • Step S302 When the signaling node detects that the connection between itself and the at least one adjacent signaling node fails, the signaling node records the routing state of each route that includes the failed connection that is stored by the signaling node as unreachable.
  • Step S303 If the signaling node is a transit node, the signaling node respectively determines whether there is a replacement route for each route that is stored by the faulty connection.
  • step S304 is performed
  • Step S304 The signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, where the routing status notification message indicates that the route between the signaling node and the destination node of the route where the replacement route does not exist is unreachable.
  • the signaling node can detect the state of the connection between itself and the adjacent signaling node in time, and in the case of discovering the connection failure, mark the routing state of the locally stored route containing the faulty connection as Unreachable, thereby completing local adjustments and logging of routing status.
  • the signaling node does not need to report the fault further, because even if it is sent by the signaling node of the upper level, it needs to be forwarded to a certain one.
  • the signaling message of the destination node of the route can also be correspondingly forwarded by replacing the route.
  • the signaling message is forwarded to the destination node by the signaling node with the unreachable route, so the signaling node of the upper level does not need to be Know the faulty connection or unreachable route.
  • the signaling node needs to report the fault further, and the specific reporting manner is performed by the broadcaster of step S304. For example, broadcast to all adjacent signaling nodes, and the corresponding signaling node records the corresponding fault information according to its own situation. In this case, if there is a signaling node that needs to send a signaling message to the destination node of the unreachable route, then it is known in advance that the signaling message addressed to the destination node cannot pass through the signaling node with the unreachable route. The delivery is performed, so the corresponding forwarding operation will not be triggered for this unreachable route, but other routes are selected for signaling message forwarding, which avoids the invalid transmission of signaling messages.
  • the specific detection rule may be time-based, such as periodic detection or timing detection, or may be based on other conditions, such as event trigger detection or instruction trigger detection, in actual response.
  • the specific detection rule can be adjusted according to the actual scene requirements, and such changes do not affect the protection scope of the present invention.
  • step S30 may only detect the current connection without the fault record, and for the connection that has detected the fault, Then continue the detection process according to the following failure recovery detection process.
  • the embodiment of the present invention further provides a fault recovery detection process, which is shown in FIG. 4, and specifically includes the following steps. :
  • Step S401 The signaling node detects the faulty connection.
  • Step S402 When the signaling node detects the fault recovery of the faulty connection, the signaling node records the routing state of each route that is stored by the fault recovery connection as reachable.
  • Step S403 If the signaling node is a transit node, the signaling node respectively determines whether there is a replacement route for each route that is stored by the fault recovery connection.
  • step S404 is performed.
  • Step S404 The signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, where the routing status notification message indicates that the route between the signaling node and the destination node of the route without the replacement route is reachable.
  • the signaling node can detect in time whether the connection with the fault has been restored, and find the connection failure. In the case of recovery, the state of the route of the locally stored route containing the connection is restored to reachable, thereby completing the local adjustment and recording of the route state.
  • steps S403 to S404 are the processing flow of the judgment of whether or not the fault is reported.
  • step S403 If the replacement route of the route that is restored to the reachable state is found in step S403, it can be determined by the description in the foregoing step S303 that when the route is marked as unreachable, it is not broadcast to other neighbors.
  • the signaling node therefore, when the route is restored to the reachable state, there is no need to notify the corresponding signaling node, and only need to complete the local routing state change and record.
  • step S403 if the replacement route of the route that is restored to the reachable state is not found in step S403, it can be determined by the foregoing description in step S303 that the signaling node has passed when the route is marked as unreachable.
  • the manner of the broadcast notifies the neighboring signaling nodes. Therefore, when the route is restored to the reachable route state, the notification is also required, that is, by step S404, a route similar to step S304 is adopted, and the route is adopted.
  • the status notification message is notified that the routing status is changed, but the content of the notification is unreachable in step S304, and is changed to reachable in step S404.
  • the signaling node when the faulty connection is restored, the signaling node can discover in time, and restore the routing state of the related route stored locally, and perform the reporting of the change of the routing state information as needed, thereby making The related network route can be restored, so that the corresponding signaling node needs to send the signaling message to the destination node that is restored to the reachable state.
  • connection detection in step S401 can also be performed in a manner similar to the detection rule in step S301, and the rule of the method can be the same as the rule in step S301, or can be different to ensure fault detection and
  • the difference between the fault recovery detections is, for example, making the detection period of the fault recovery detection process shorter, so that the recovery of the fault can be found at the first time, or the fault recovery detection is triggered by the instruction only after the fault is repaired.
  • the changes do not affect the scope of protection of the present invention.
  • the detecting operations in the foregoing steps S301 and S401 may be performed by using an SCTP layer message, or may be performed by other protocols, and the change of the message type does not affect the protection scope of the present invention.
  • the process of detecting the signaling node itself and triggering the broadcast is said.
  • the signaling node can broadcast the routing status notification message to the adjacent signaling node, and may also receive the routing status notification message broadcast by the adjacent signaling node, and below, the signaling node
  • the process flow after receiving the route state notification message is described.
  • the process diagram is as shown in FIG. 5, and specifically includes the following steps:
  • Step S501 The signaling node identifies the content of the route state notification message.
  • step S502 is performed;
  • step S506 is performed.
  • Step S502 The signaling node determines whether it stores a route that reaches the at least one destination node through the adjacent signaling node.
  • step S503 is performed
  • the judgment result is no, it indicates that there is no routing information corresponding to the destination node in the routing state notification message in the signaling node, therefore, any signaling message that needs to be sent to the destination node will not By forwarding through the signaling node, the signaling node does not need to record the route corresponding to the destination node.
  • Step S503 The signaling node records, as the unreachable, the routing state of each route that is stored by the neighboring signaling node and reaches the at least one destination node.
  • Step S504 If the signaling node is a transit node, the signaling node respectively determines whether there is a replacement route for each route that is stored by the neighboring signaling node to reach the at least one destination node.
  • step S505 is performed
  • Step S505 The signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, where the routing status notification message indicates that the routing between the signaling node and the at least one destination node is unreachable.
  • Step S506 The signaling node determines whether it has stored at least one through the adjacent signaling node. Routing of destination nodes;
  • step S507 is performed
  • step S502 If the judgment result is no, the operation is directly ended, and the message is not further notified according to the route status notification. For the corresponding reason, see step S502.
  • Step S507 The signaling node records, as the reachable, the routing state of each route that is stored by the neighboring signaling node and reaches the at least one destination node.
  • Step S508 If the signaling node is a transit node, the signaling node respectively determines whether there is a replacement route for each route that is stored by the adjacent signaling node to reach the at least one destination node.
  • step S509 is performed
  • Step S509 The signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, where the routing status notification message indicates that the routing between the signaling node and the at least one destination node is reachable.
  • the signaling node adjusts the routing state record of the locally stored route according to the message broadcast by the neighboring signaling node, and performs a further reporting operation when necessary.
  • the local fault information of each signaling node in the network can be recorded, and in the case of the route association, the fault information is transmitted between the associated signaling nodes.
  • the signaling node can be faulted in time. Routing replaces the route, and when there is no replacement route, reports the upper-level signaling node, and the upper-level signaling node selects the alternative route.
  • the structure of the foregoing routing state notification message specifically includes: a host name of at least one destination node, a host name of a signaling node that sends the routing state notification message, and a routing state; wherein, the routing state is used by Record whether the route to the destination node through the signaling node is reachable.
  • the signaling node determines that the destination node corresponding to the route that does not have the replacement route stored by the signaling node is multiple
  • the operation of the signaling node to broadcast the routing state notification message to each of its neighboring signaling nodes may be divided into The following two:
  • the signaling node broadcasts a plurality of routing state notification messages to each of the neighboring signaling nodes, and each routing state notification message carries information of each of the plurality of destination nodes.
  • the signaling node broadcasts a routing status notification message to each of its neighboring signaling nodes, and the routing status notification message carries information of all the multiple destination nodes.
  • the signaling node completes the record of the routing state, and when receiving the signaling message to be forwarded, avoids selecting the route whose routing state is unreachable, but selects the routing state as reachable.
  • the route is forwarded to ensure the normal transmission of signaling messages.
  • the signaling node When the signaling node receives the signaling message to be forwarded, the signaling node determines the destination node of the signaling message to be forwarded, and the signaling node identifies the routing state of each route corresponding to the destination node of the signaling message to be forwarded. And forwarding the to-be-forward signaling message to the destination node by using a route whose route state is reachable.
  • the adjacent signaling node will be notified, therefore, after receiving the notification message, each The adjacent signaling node will not send the signaling message of the destination node corresponding to the faulty route to the signaling node, and complete the signaling message forwarding by replacing the route.
  • Such a processing manner effectively avoids delay and bandwidth waste.
  • the technical solution proposed by the embodiment of the present invention has the following advantages:
  • the state of the connection between the adjacent signaling nodes by the signaling node Detection, timely detection of connection failures, and in the event of a failure the corresponding record and notification mechanism is applied, so that each relevant signaling node can accurately obtain routing state information and select an alternate route, thereby enabling the signaling node to perform a signal
  • Embodiment 1 The technical solutions proposed in the embodiments of the present invention are further described in detail below with reference to specific application scenarios. Embodiment 1
  • the embodiment of the present invention provides a specific application scenario, where the connection relationship between the signaling nodes in the application scenario is as shown in FIG. 6, and correspondingly, the technical solution proposed by the implementation of the present invention is in the application.
  • the implementation process in the scenario specifically includes the following steps:
  • Step S601 Node A detects that the signaling connection of its neighboring node (Node 2) is unavailable through the SCTP layer, and the routing state of Node A locally arriving at Node 2 is unreachable.
  • Step S602 the node A passes all the neighboring nodes (node 1, node B, node C, and node) through the Diameter signaling message (which is a new signaling message in the embodiment of the present invention, that is, the foregoing routing state notification message).
  • Diameter signaling message broadcast by the node A can be as shown in Table 1:
  • each neighboring node (node, node B, node C, and node D) records the routing state of the node 2 after receiving the broadcast Diameter signaling message (the path through node A) By unreachable).
  • the node, the node B, the node C, and the node D all store the route that reaches the node 2 through the node A. Therefore, it can be considered that each of the above nodes performs the operation of step S603, but if it does not exist Such a route, for example, if node 1 is the destination node and does not store the route that arrives at node 2 through node A, then node 1 will not record such a route state, ie, the broadcast Diameter signaling message will not be processed.
  • node B since there are alternative routes to node 2 in node 1, node B, node C, and node D, the notification message broadcast of the failure will not continue.
  • Step S604 when the node B receives the signaling message of the host name whose destination address is the node 2, the node B checks the routing table and the routing state, and finds that the route sent by the node A to the node 2 is unreachable, so Node A sends a signaling message whose destination address is node 2, but selects another available route (alternate route or other route for load sharing) to send the signaling message.
  • the path selected by the node B may be that the signaling message is sent to the node 2 through the node C, and the route that reaches the node 2 through the node C is the route that reaches the node 2 through the node A. Replacement route.
  • the corresponding processing flow is similar to the step S604, and is not repeated here, on the other hand, if the node! [The signaling message needs to be sent to the node 2, and the selection process of the corresponding replacement route can also refer to the above step S604.
  • the neighboring node of the node A may not receive the D meter signaling message broadcast by the node A, that is, the node A may still be A neighboring node (such as node D) receives a signaling message whose destination address is node 2.
  • node A will actively send a D-receipt signaling message to node D, and notify node D again through node A.
  • the route between node 2 is unreachable.
  • connection failures since the detection of connection failures is mutual, when node A detects a failure, the failure can also be detected in node 2, but since node 2 is not a transit node in the current network, It is a terminal node, so node 2 only needs to record the fault without broadcasting. Further, for the faulty connection between node A and node 2, node A will continue to perform corresponding detection to verify whether the fault of the connection is restored.
  • the corresponding fault recovery detection process is as shown in FIG. 7, which specifically includes the following steps. :
  • Step S701 When the node A detects that the signaling connection to the node 2 is available through the SCTP layer, the node A records the reachable state of the route to the node 2 as reachable.
  • the path including the connection between the node A and the node 2 in the node A has only the route between the node A and the node 2, the other routes stored by the node A are not affected.
  • step S702 since there is no replacement route for the route between the node A and the node 2, the node A needs to notify the neighboring other nodes that the fault has been recovered, that is, the process proceeds to step S702.
  • Step S702 After the node A finds that the route bundle reaching the node 2 is reachable, the neighboring node (node 1, node B, node C, and Node D) broadcasts the reachable information through node A to node 2, notifying these nodes that they can send messages to node 2 to themselves.
  • the specific format of the Diameter signaling message broadcast by the node A can be as shown in Table 2:
  • Step S703 Each neighboring node (node) U node B, node C, and node D) records the routing state of the arriving node 2 (accessible by the route of node A) after receiving the broadcast Diameter signaling message.
  • Step S704 when the node B receives the signaling message of the host name whose destination address is the node 2, the node ⁇ looks at the routing table and the routing state, and finds that the route sent by the node to the node 2 is reachable, so Node A sends a signaling message whose destination address is Node 2.
  • Node B can also choose other The available routes (alternate routes or other routes of load sharing) send the signaling message, and the specific selection rules can be adjusted according to actual needs.
  • step S704 the corresponding processing flow is similar to that of step S704, and is not repeated here.
  • the node 1 needs to go to the node 2
  • the signaling process is sent.
  • the selection process of the corresponding replacement route can also refer to step S704 described above.
  • each node will trigger the corresponding fault broadcast, and pass it step by step. All the nodes in the network will know that there is no reachable route capable of sending signaling messages to node 2, when a node (such as a node) 3) When a signaling message needs to be sent to the node 2, the signaling message is directly notified that the signaling message is unreachable, and the invalid transmission of the signaling message is avoided.
  • the implementation of the present invention provides a specific application scenario.
  • the connection relationship between the signaling nodes in the application scenario is as shown in FIG. 9.
  • the technical solution proposed by the embodiment of the present invention is applicable to the application.
  • the implementation process in the scenario specifically includes the following steps:
  • Step S90 Node B detects that the signaling connection of its neighbor node (Node A) is unavailable through the SCTP layer, and Node B records the route status of node A to the node A as unreachable.
  • the path including the connection between the Node B and the Node A has a record in addition to the route between the Node B and the Node A, and a route from the Node B to the Node 1 through the Node A, and Node B reaches the route of node 2 through node A. Therefore, node B needs to replace the route with the above three route queries.
  • Node B does not query the alternative route for the above-mentioned routing, then Node B needs to notify the neighboring other nodes of the failure, that is, proceed to step S902.
  • Step S902 the node B passes all the neighboring nodes through the Diameter signaling message (ie, the foregoing routing state notification message) (due to the connection failure to the node A, the neighboring nodes of the node B only The remaining nodes E) broadcast the information that the route from the node B to the node A, the node 1 and the node 2 are unreachable, and notify the node E not to send the message to the node A, the node 1 or the node 2 to itself.
  • the Diameter signaling message ie, the foregoing routing state notification message
  • the specific format of the Diameter signaling message broadcasted by the Node B may include two types, that is, the foregoing separately sent and simultaneously transmitted.
  • Table 3 shows the format of D metei: signaling message respectively sent
  • Step S903 After receiving the broadcast Diameter signaling message, each neighboring node (Node E) records the routing state to the node A, the node 1 and the node 2 (both routes through the node B are unreachable).
  • the node E stores the route to the node A, the node 1 and the node 2 through the node B, so that the node E can perform the operation of step S903 on the three routes, but if not There is any one or more routes in it. For example, if node E does not store the route that arrives at node A through node B, then node E will not record the routing state to node A, that is, the Diameter signaling to the broadcast. Information about the unreachable node A in the message is not processed.
  • node E will broadcast a Diameter signaling message to other neighboring nodes to inform them that the route to node A and node 1 is unreachable.
  • Node B After such processing, Node B will no longer receive signaling messages arriving at Node A, Node 1, and Node 2.
  • the node E since the node E also reports the message that the route to the node A and the node 1 is unreachable, the node E also does not receive the signaling message to the node A and the node 1.
  • the node E directly reports to the node 3 that the route to the node A and the node is unreachable, when the node 3 needs to send a signaling message to the node A and the node 1, the signaling message is directly learned. Unreachable.
  • Step S904 When the node E receives the signaling message of the host name whose destination address is the node 2, the node E checks the routing table and the routing state, and finds that the route sent by the node B to the node 2 is unreachable, so The node B sends a signaling message whose destination address is node 2, but selects another available route (alternate route or other route of load sharing) to send the signaling message.
  • the path selected by the node E may be that the signaling message is sent to the node 2 through the node D and the node C, and the node D and the node C reach the node 2 through the node B.
  • the neighboring node of the node E may not receive the Diameter signaling message broadcast by the node E, that is, the node E may still be from a certain
  • the neighboring node (such as node 3) receives the signaling message whose destination address is node 1, in which case the node E will actively send the Diameter signaling message to the node 3, and notify the node 3 to pass the node E to the node 1 again.
  • the route between the two is unreachable.
  • node A since the detection of connection failures is mutual, when node B detects a failure, node A can also detect the failure. In actual case, node A is also a turn. The node is connected to the node. Therefore, the node A can also use the above process to record and broadcast the fault. That is, the route between the local and the node B is unreachable, and the replacement route is determined. If the replacement route is not stored locally, Broadcasting the fault, as shown in Figure 9, since the connection to Node B has failed, Node A actually needs to go to Node I and the node.
  • the Diameter signaling message is sent, and if the node 2 stores the replacement route locally (for example, the route that reaches the node B through the node C, the node D, and the node E), the node 2 will not perform the broadcasting operation, and for the node 1, Although it does not store the replacement route to the node B, it is already the end point of the broadcast. Therefore, the broadcast may not be continued.
  • the replacement route for example, the route that reaches the node B through the node C, the node D, and the node E
  • the technical solution proposed by the two embodiments of the present invention has the following advantages:
  • the state of the connection between the adjacent signaling nodes by the signaling node Detection, timely detection of connection failures, and in the event of a failure, apply appropriate logging and notification mechanisms, so that each relevant signaling node can accurately obtain routing status information, and select alternate routing, and the signaling node is in the process
  • the routing information can be forwarded according to the accurate routing state information, and the signaling message is forwarded to solve the problem of invalid transmission and message delay caused by the existing routing mechanism, thereby avoiding bandwidth waste and upper layer services. Impact.
  • an embodiment of the present invention further provides a signaling node, and a schematic structural diagram thereof is shown in FIG. 10, including:
  • the storage module 101 is configured to store routing information corresponding to the signaling node.
  • the detecting module 102 is configured to detect a connection state between the signaling node and each adjacent signaling node, and the recording module 103 is configured to: when the detecting module 102 detects the signaling node and the at least one adjacent signaling node When the connection fails, the routing status of each route including the failed connection stored by the storage module 101 is recorded as unreachable;
  • the determining module 104 is configured to determine, when the signaling node is a transit node, whether there is a replacement route for each route that includes the faulty connection stored by the storage module 101;
  • the broadcast module 105 is configured to: when the judgment result of the determining module 104 is non-existent, broadcast a routing state notification message to each adjacent signaling node of the signaling node, where the routing state notification message indicates that the signaling node and the route without the replacement route exist.
  • the route between the destination nodes is unreachable.
  • each functional module can also implement a corresponding fault recovery detection process, which is specifically described as follows:
  • the detecting module 102 is further configured to detect the faulty connection;
  • the recording module 03 is further configured to record, when the detecting module 102 detects the fault recovery of the faulty connection, the routing state of each route including the fault recovery connection stored by the storage module 10 as reachable;
  • the determining module 104 is further configured to: determine, when the signaling node is a transit node, whether there is a replacement route for each route that includes the fault recovery connection stored by the storage module 101;
  • the broadcast module 105 is further configured to: when the judgment result of the determining module 04 is absent, broadcast a routing state notification message to each adjacent signaling node of the signaling node, where the routing state notification message indicates that the signaling node does not have an alternate route The route between the destination nodes of the route is reachable.
  • the signaling node further includes:
  • the receiving module 106 is configured to receive the routing-like storage module 101 sent by each adjacent signaling node of the signaling node, and is further configured to: when the receiving module receives the routing status notification message, indicate the adjacent signaling node and When the route between the at least one destination node is unreachable, the query itself stores a route that reaches the at least one destination node through the adjacent signaling node;
  • the recording module 103 is further configured to: when the query result of the storage module 101 is YES, record the routing state of each route that is stored by the storage module 101 and reach the at least one destination node by the adjacent signaling node as unreachable;
  • the determining module 104 is further configured to: when the signaling node is a transit node, determine whether there is a substitute path for each route that the storage module 101 stores to reach the at least one destination node by using the adjacent signaling node:
  • the broadcast module 105 is further configured to: when the judgment result of the determining module 104 is non-existent, broadcast a routing state notification message to each adjacent signaling node of the signaling node, where the routing state notification message indicates that the signaling node and the at least one destination node The route between the two is unreachable.
  • the storage module 101 is further configured to: when the route state notification message received by the receiving module 106 indicates that the route between the adjacent signaling node and the at least one destination node is reachable, query the self. Whether to store a route to at least one destination node through the adjacent signaling node;
  • the recording module 103 is further configured to: when the query result of the storage module 101 is yes, the routing state of each route that is stored by the storage module 101 and reaches the at least one destination node through the adjacent signaling node. Record as reachable;
  • the determining module 104 is further configured to: when the signaling node is a transit node, determine whether each route that is stored by the storage module 101 to reach the at least one destination node by using the adjacent signaling node exists for the broadcast module 05, and is further used for When the judgment result of the determining module 104 is non-existent, the routing status notification message is broadcast to each adjacent signaling node of the signaling node, and the routing status notification message indicates that the route between the signaling node and the at least one destination node is reachable.
  • the broadcast module 105 is specifically configured to: separately report to each phase of the signaling node.
  • the neighboring signaling node broadcasts multiple routing state notification messages, and each routing state notification message carries information of each of the multiple destination nodes; or
  • the routing status notification message is broadcast to each adjacent signaling node of the signaling node, and the routing status notification message carries information of all the multiple destination nodes.
  • the receiving module 106 is further configured to receive a signaling message to be forwarded, and the signaling node further includes:
  • the forwarding module 107 is configured to query, when the receiving module 106 receives the signaling message to be forwarded, the routing state of each route corresponding to the destination node of the to-be-forwarded signaling message stored by the storage module 101, and the routing status is The route to the destination forwards the signaling message to be forwarded to the destination node.
  • the technical solution proposed by the embodiment of the present invention has the following advantages:
  • the state of the connection between the adjacent signaling nodes by the signaling node Detection, timely detection of connection failures, and in the event of a failure, the corresponding record and notification mechanism is applied, so that each relevant signaling node can accurately obtain routing state information and select an alternate route, thereby enabling the signaling node to perform a signal
  • the reachable route can be selected to perform signaling message forwarding according to the accurate routing state information, and the problem of invalid transmission and message delay caused by the existing routing mechanism is solved, and the signaling message forwarding efficiency is improved.
  • the implementation of the present invention can be implemented by hardware, or by means of a general hardware platform of software plus.
  • the technical solution of the embodiment of the present invention may be in the form of a software product.
  • the software product can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), and includes a plurality of instructions for making a computer device (which can be a personal computer, a server, Or the network device or the like) performs the method described in each implementation scenario of the embodiment of the present invention.
  • modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario.
  • the modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.
  • serial numbers of the foregoing embodiments of the present invention are merely for description, and do not represent the advantages and disadvantages of the implementation scenarios.

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Description

本发明涉及通信技术领域, 特别是涉及一利 由保护方法 计算
: ¾坟不
在现有的 ίΈ ( Long Term Evolution ,长期演进:)网络中,由 S ΑΕ ( System Architecture Evolution , 进) 为 Έ用户提供移动性管理和业务
Figure imgf000003_0001
当 ΙΤΕ用户漫游到拜访地 MME (Mobile Management Entity, 移动管理 实体 ) 网元下时, MME会向用户归属 HSS (Home Subscriber Server, 归属 ^户服务器) 发起位置更新和鉴权流程。 这些流程在 SAE 网络中都是采用 Diameter协议(直径协议, 下一代的 AAA协议标准)实现的, 信令协议栈为 Diameter/SCTP ( Stream Control Transmission Protocol, 流控制传输协议 ) /IP (Internet Protocol, 网络互联协议)。 由于一个 HSS中 UTE用户可以漫游到 全网任何一个 MME网元下, 也即一个 MME下的用户可能归属于全网任何 一个 HSS, 这样全网 MME与全网 HSS之间就存在全连接关系。 为了维护管 理方便, 在实现 Diameter消息路由中会使用 DRA (Diameter Routing Agent, Diameter路由代理) 网元, 通过 DRA来转接 MME与 HSS之间的所有信令, 以避免全连接带来的全网数据配置维护问题,现有技术中应用 DRA的网络系 统的结构示意图如图 2所示。 其中:
MME和 HSS等 Diameter节点可以看作 Diameter信令的源节点或目的节 点, 支持 Diameter/SCTPZIP协议栈。
其中, 源 /目的节点的 D meter协议层完成位置更新等接口信令流程处 理, 以及 Diameter信令寻址和路由。 Diameter信令寻址方式具体包括 IMSI
(International Mobile Subscriber Identification Number, 国际移动用户 i只另码) 寻址、 域名寻址及主机名寻址。采用 IMSI寻址、 域名寻址方式时, 源节点不 知道目的节点的主机名; 采用主机名寻址时, 源节点必须知道目的节点的主 机名。 D meter协议没有明确规定信令路由方式, 只是描述可以釆用主备路 由及负荷分担路由方式。 Diameter协议没有定义路由机制, Diameter节点不 记录、 不检测、 不传递到一个目的节点的信令路由状态 (是否可达)。
DRA可以看作 Diameter信令的中继节点,也支持 Diameter/SCTP/IP ^议 其中, 中继节点的 Diameter ^议层不进行接口信令流程处理, 仅完成 Diameter信令寻址和路由。中继节点支持 IMSI寻址、域名寻址及主机名寻址, 釆用 IMSI寻址、 域名寻址方式时, 中继节点需要完成地址翻译, 将 IMSI和 域名翻译成目的主机名; 采^主机名寻址时, 中继节点仅需完成信令转接。 中继节点也可以采用主备路由及负荷分担路由方式。 中继节点也不记录、 不 检測、 不传递到一个目的节点的信令路由状态 (是否可达)。
在现有的 Diamete 信令路由机制中, 源节点根据路由算法将 1条信令消 息选择一条信令连接发往 1个 DRA, 通过 DRA节点组成的信令汇接层面将 这条信令消息路由到目的节点。当信令汇接层面中某一个 DRA节点收到这条 信令消息后, 检测到与下一跳 DRA节点之间的 SCTP信令连接中断, 无法送 到该消息, 该节点会向上一跳节点返回一条错误响应, 告诉其该消息无法送 达到目的地。 上一跳节点收到这条错误响应后, 检查对该消息是否还有其他 路由 (备用路由或负荷分担的其他路由), 如有, 将选择其他路由重新发送该 条消息。 该节点不记录这条消息无法送达的路由, 也不对后续收到的消息直 接选择已发送消息的重传路由, 因此对于后续收到消息仍会从无法送达的路 在实现本发明的过程中, 发明人发现现有技术至少存在如下问题: 上述 Diameter信令路由机制对于一条信令消息而言存在保护机制, 当设 置的主 ^路由不可达时, 可以将其选择其他路由重新发送。 但对于后续发送 的消息没有路由保护机制。 这是 D meter协议作为应用层协议进行消息路由 的特点。
基于这样的特点, 当 Diameter节点或链路出现故障时, 对于消息的错误 响应可以实现该消息的重传, 保证可靠传送, 但后续消息扔会持续向不可达 路由上传送, 导致消息量和消息时延增加。 本发明的目的在于提供一种应用层信令路由保护方法、 设备 ^计算机程 序和存储介质, 实现对路由状态的及时检测, 减少因错误重传而导致的消息 时延, 为此, 本发明实施例采用如下技术方案:
一种应用层信令路由保护方法, 包括以下步骤:
信令节点检测自身与各相邻信令节点之间的连接状态;
当所述信令节点检测到自身与至少一个相邻的信令节点之间的连接发生 故障时, 所述信令节点将自身存储的各包括所述发生故障的连接的路由的路 由状态记录为不可达;
如果所述信令节点为转接节点, 所述信令节点分别判断自身所存储的各 包括所述发生故障的连接的路由是否存在替换路由;
如果判断结果为不存在, 所述信令节点向自身的各相邻信令节点广播路 由状态通知消息, 所述路由状态通知消息指示所述信令节点与所述不存在替 换路由的目的节点之间的路由不可达。
一种信令节点, 包括:
存储模块, 用于存储所述信令节点所对应的路由信息;
检测模块, ^于检测所述信令节点与各相邻信令节点之间的连接状态; 记录模块, 用于当所述检测模块检测到所述信令节点与至少一个相邻的 信令节点之间的连接发生故障时, 将所述存储模块所存储的各包括所述发生 故障的连接的路由的路由状态记录为不可达;
判断模块, 用于在所述信令节点为转接节点时, 分别判断所述存储模块 所存储的各包括所述发生故障的连接的路由是否存在替换路由;
广播模块, 用于在所述判断模块的判断结果为不存在时, 向所述信令节 点的各相邻信令节点广播路由状态通知消息, 所述路由状态通知消息指示所 述信令节点与所述不存在替换路由的路由的目的节点之间的路由不可达。
一种包括指令的计算机程序, 当被处理器执行时所述指令被安排成使得 所述处理器执行上述的应用层信令路由保护方法。
一种存储上述的计算机程序的存储介质。 与现有技术相比, 本发明实施例所提出的技术方案具有以下优点: 通过应用本发明实施例所提出的技术方案, 通过信令节点对其相邻的信 令节点之间的连接的状态检测, 及时发现连接故障, 并在出现故障时, 应用 相应的记录和通知机制, 使得各相关的信令节点能够准确的获取路由状态信 息, 并选择替换路由, 从而, 使信令节点在进行信令消息转发时可以根据准 确的路由状态信息, 选择可达路由进行信令消息转发, 解决现有的路由机制 所带来的无效传送和消息时延的问题, 避免带宽浪费和对上层业务的影响。 附图说明
图 1为现有技术中的 SAE网络的结构示意图;
图 2为现有技术中应用 DRA的网络结构示意图;
图 3为本发明实施例所提出的一种应用层信令路由保护方法的流程示意 图;
图 4本发明实施例所提出的一种应用层信令路由保护方法在故障恢复检 测过程中的流程示意图;
图 5本发明实施例所提出的一种应用层信令路由保护方法在接收到路由 状态通知消息后的处理过程的流程示意图;
图 6为本发明实施例所提出的一种应用应用层信令路由保护方法具体应 用场景的示意图;
图 7为本发明实施例所提出的一种应用应用层信令路由保护方法具体应 用场景的示意图;
8为本发明实施例所提出的一种应用应用层信令路由保护方法具体应 用场景的示意图;
图 9为本发明实施例所提出的一种应用应用层信令路由保护方法具体应 用场景的示意图;
图 10为本发明实施例所提出的一种信令节点的结构示意图。
下面将结合本发明中的附图, 对本发明中的技术方案进行清楚、 完整的 描述, 显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的实施 例。 基于本发明中的实施例, 本领域普通技术人员在没有做出创造性劳动的 前提下所获得的所有其他实施俩, 都属于本发明保护的范围。
如图 3所示, 为本发明实施例所提出的一种应用层信令路由保护方法的 流程示意图, 具体包括以下步骤:
歩骤 S30 信令节点检测自身与各相邻信令节点之间的连接状态。 步骤 S302、 当信令节点检測到自身与至少一个相邻的信令节点之间的连 接发生故障时, 信令节点将自身存储的各包括发生故障的连接的路由的路由 状态记录为不可达。
歩骤 S303、 如果该信令节点为转接节点, 信令节点分别判断自身所存储 的各包括发生故障的连接的路由是否存在替换路由。
如果判断结果为不存在, 执行步骤 S304 ;
如果判断结果为存在, 则结束本次操作。
歩骤 S304、 信令节点向自身的各相邻信令节点广播路由状态通知消息, 该路由状态通知消息指示经过该信令节点与不存在替换路由的路由的目的节 点之间的路由不可达。
通过上述的处理流程, 信令节点可以及时检测自身与相邻的信令节点之 间的连接的状态, 在发现连接故障的情况下, 将本地存储的包含该故障连接 的路由的路由状态标记为不可达, 从而, 完成路由状态的本地调整和记录。
同时, 上述的步骤 S303至步骤 S304则是对该故障是否进行上报的判断 处理流程。
如果步骤 S303中发现了不可达路由的替换路由, 那么, 该信令节点将无 需对该故障进行进一歩上报, 因为, 即使收到上一级的信令节点发送过来的 需要转发到某一个不可达路由的目的节点的信令消息, 也可以通过替换路由 完成相应的转发。 对于发送该信令消息的上一级的信令节点来说, 该信令消 息都是通过这一存在不可达路由的信令节点转发给了目的节点, 所以, 上一 级的信令节点无需知道该故障连接或者不可达路由的情况。
而如果步骤 S303中没有发现不可达路由的替换路由, 那么, 该信令节点 需要对该故障进行进一步上报,具体的上报方式则是通过步骤 S304的广播方 式, 广播给所有相邻的信令节点, 相应的信令节点根据自身的情况记录相应 的故障信息。 在此情况下, 如果有信令节点需要向不可达路由的目的节点发 送信令消息, 那么, 由于提前已经获知了发往这个目的节点的信令消息不能 通过这个存在不可达路由的信令节点迸行送达, 所以, 将不会对这个不可达 路由触发相应的转发操作, 而是选择其他路由进行信令消息转发, 避免了信 令消息的无效传送。
需要指出的是, 在歩骤 S30 中, 具体的检测规则可以是基于时间的, 例 如周期性检测或定时检测, 也可以是基于其他条件的, 例如事件触发检测或 指令触发检测, 在实际的应^场景中, 具体应用哪种检测规则可以根据实际 场景需要而进行调整, 这样的变化并不影响本发明的保护范围。
另一方面, 为了避免上述步骤 S30 至步骤 S304的流程对于同一故障连 接的重复操作,步骤 S30 中的处理过程可以只针对当前的没有故障记录的连 接进行检测, 而对于已检测到故障的连接, 则根据以下的故障恢复检测流程 进行继续的检测处理。
在信令节点将自身存储的各包括发生故障的连接的路由的路由状态记录 为不可达之后, 本发明实施例进一步提出了故障恢复检测流程, 其流程示意 图如图 4所示, 具体包括以下步骤:
歩骤 S401、 信令节点对发生故障的连接进行检测。
步骤 S402、 当信令节点检测到发生故障的连接的故障恢复时, 信令节点 将自身存储的各包括故障恢复的连接的路由的路由状态记录为可达。
步骤 S403、 如果该信令节点为转接节点, 信令节点分别判断自身所存储 的各包括故障恢复的连接的路由是否存在替换路由。
如果判断结果为存在, 则完成本次故障恢复检测流程;
如果判断结果为不存在, 则执行歩骤 S404。
步骤 S404、 信令节点向自身的各相邻信令节点广播路由状态通知消息, 该路由状态通知消息指示经过该信令节点与不存在替换路由的路由的目的节 点之间的路由可达。
与前述的说明相类似, 通过上述的歩骤 S401至歩骤 S404的处理流程, 信令节点可以及时检测自身存在故障的连接是否已经恢复, 在发现连接故障 恢复的情况下, 将本地存储的包含该连接的路由的路由状态恢复为可达, 从 而, 完成路由状态的本地调整和记录。
同时, 上述的步骤 S403至歩骤 S404则是对该故障是否进行上报的判断 处理流程。
如果歩骤 S403中发现了恢复为可达状态的路由的替换路由, 那么, 由前 述的歩骤 S303中的说明可以确定, 在该路由被标记为不可达时, 并没有广播 给其他的相邻的信令节点, 因此, 在该路由恢复为可达状态时, 也就没有必 要通知相应的信令节点, 只需要完成本地的路由状态变更和记录即可。
相反的, 如果步骤 S403中没有发现恢复为可达状态的路由的替换路由, 那么, 同样由前述的步骤 S303中的说明可以确定, 在该路由被标记为不可达 时, 本信令节点已经通过广播的方式通知了各相邻的信令节点, 因此, 在该 路由恢复为可达的路由状态时, 同样需要进行这样的通知, 即通过歩骤 S404, 采用类似于步骤 S304的方式,通过路由状态通知消息进行路由状态变成的通 知, 只是通知的内容有步骤 S304中的不可达, 改为了歩骤 S404中的可达。
通过上述的故障恢复检测流程, 使故障连接恢复时, 信令节点可以及时 发现, 并将本地存储的相关路由的路由状态进行恢复, 并根据需要进行相应 的路由状态信息变更的上报, 从而, 使得相关的网络路由得以恢复, 使相应 的信令节点需要向该恢复为可达状态的路由的目的节点进行信令消息发送 时, 依旧可以正常地利用这条路由进行信令消息转发。
需要进一歩指出的是,步骤 S401中的连接检测同样可以采用类似于步骤 S301 中的检测规则进行, 并且, 其应 ^的规则可以与步骤 S301 中的规则相 同, 也可以不同, 保证故障检测和故障恢复检测之间的区别, 倒如, 使故障 恢复检测过程的检测周期更短, 以便能在第一时间发现故障的恢复, 或者只 在故障修复后, 通过指令触发相应的故障恢复检测, 这样的变化并不影响本 发明的保护范围。
在实际的应 ^中, 上述的歩骤 S301和歩骤 S401中的检测操作可以通过 SCTP层消息来完成,也可以通过其他协议进行,消息类型的变化并不会影响 本发明的保护范围。
通过前述的描述, 对信令节点自身进行检测并触发广播的流程进行了说 明, 在同一个网络系统中, 信令节点能够向相邻的信令节点广播路由状态通 知消息, 也有可能接收到相邻的信令节点所广播的路由状态通知消息, 下面, 对信令节点接收到路由状态通知消息后的处理流程进行说明, 其流程示意图 如图 5所示, 具体包括以下步骤:
步骤 S501、 信令节点识别路由状态通知消息的内容。
当信令节点识别路由状态通知消息指示相邻信令节点与至少一个目的节 点之间的路由不可达时, 执行步骤 S502 ;
当信令节点识别路由状态通知消息指示相邻信令节点与至少一个目的节 点之间的路由可达时, 执行步骤 S506。
歩骤 S502、 信令节点判断自身是否存储了通过相邻信令节点到达至少一 个目的节点的路由。
如果判断结果为是, 执行步骤 S503 ;
如果判断结果为否, 则直接结束本次操作, 不会根据该路由状态通知消 息进行进一步操作。
因为在判断结果为否的情况下, 表明本信令节点中并不存在任何对应该 路由状态通知消息中的目的节点的路由信息, 因此, 任何需要发向该目的节 点的信令消息都不会通过本信令节点进行转发, 本信令节点也就没有必要对 该目的节点所对应的路由进行记录。
步骤 S503、 信令节点将自身存储的各通过相邻信令节点到达至少一个目 的节点的路由的路由状态记录为不可达。
步骤 S504、 如果该信令节点为转接节点, 信令节点分别判断自身所存储 的各通过相邻信令节点到达至少一个目的节点的路由是否存在替换路由。
如果判断结果为不存在, 执行歩骤 S505 ;
如果判断结果为存在, 则直接结束本次操作, 具体的结束本次操作的理 由参见前述的步骤 S303中的说明。
歩骤 S505、 信令节点向自身的各相邻信令节点广播路由状态通知消息, 该路由状态通知消息指示该信令节点与至少一个目的节点之间的路由不可 达。
步骤 S506、 信令节点判断自身是否存储了通过相邻信令节点到达至少一 个目的节点的路由;
如果判断结果为是, 执行步骤 S507;
如果判断结果为否, 则直接结束本次操作, 不会根据该路由状态通知消 息迸行进一步操作, 相应的理由参见歩骤 S502。
步骤 S507、 信令节点将自身存储的各通过相邻信令节点到达至少一个目 的节点的路由的路由状态记录为可达。
步骤 S508、 如果该信令节点为转接节点, 信令节点分别判断自身所存储 的各通过相邻信令节点到达至少一个目的节点的路由是否存在替换路由。
如果判断结果为不存在, 执行步骤 S509 ;
如果判断结果为存在, 则直接结束本次操作, 具体的结束本次操作的理 由参见前述的步骤 S403中的说明。
歩骤 S509、 信令节点向自身的各相邻信令节点广播路由状态通知消息, 该路由状态通知消息指示该信令节点与至少一个目的节点之间的路由可达。
通过上述的说明, 本信令节点根据自身相邻的信令节点所广播的消息调 整本地存储的路由的路由状态记录, 并在必要时, 进行进一步的上报操作。
结合前述的步骤 S301 至歩骤 S304所描述的本地故障检测, 歩骤 S401 至歩骤 S404所描述的本地故障恢复检测,以及步骤 S501至步骤 S509所描述 的接收到广播后的记录和上报流程, 可以实现网络中各信令节点本地的故障 信息记录, 并在存在路由关联的情况下, 在各关联的信令节点之间实现故障 信息传递, 通过这样的处理, 可以使信令节点及时为故障路由选择替换路由, 并在没有替换路由时, 上报上一级信令节点, 由上一级信令节点进行替换路 由的选择, 通过这样的回溯方式, 只要在信令消息转发路径中的任何一级信 令节点中存在替换路由, 就不会出现信令消息被发送到存在路由故障的信令 节点而不能被正常转发的情况, 从而, 有效地减少了无效信令消息传输, 缩 短了信令消息时延。
在具体的实施场景中, 上述的路由状态通知消息的结构, 具体包括至少 一个目的节点的主机名、 发送所述路由状态通知消息的信令节点的主机名, 以及路由状态; 其中, 路由状态用于记录通过该信令节点到目的节点的路由 是否可达。 进一步的, 当信令节点判断自身所存储的不存在替换路由的路由所对应 的目的节点为多个时, 信令节点向自身的各相邻信令节点广播路由状态通知 消息的操作可以分为以下两种:
( 1 ) 分别发送
信令节点分别向自身的各相邻信令节点广播多条路由状态通知消息, 各 路由状态通知消息中分别携带各多个目的节点的信息。
( 2 ) 同时发送
信令节点向自身的各相邻信令节点广播路由状态通知消息, 路由状态通 知消息中携带全部多个目的节点的信息。
在实际应用中, 具体应用上述的哪种发送方式, 并不会影响本发明的保 护范围。
至此, 通过上述的各处理流程, 信令节点完成了路由状态的记录, 在接 收到待转发的信令消息时, 避免选择路由状态为不可达的路由进行转发, 而 是选择路由状态为可达的路由进行转发, 以保证信令消息的正常传输, 相应 的处理流程如下:
当信令节点接收到待转发信令消息时, 信令节点确定待转发信令消息的 目的节点, 信令节点识别自身存储的与待转发信令消息的目的节点相对应的 各路由的路由状态, 并通过路由状态为可达的路由向目的节点转发待转发信 令消息。
如前,如果本信令节点中到某一个相邻的信令节点的路由状态为不可达, 且没有替换路由, 那么将会通知相邻的信令节点, 因此, 收到通知消息后, 各相邻的信令节点将不会向这个信令节点发送对应该故障路由的目的节点的 信令消息, 通过替换路由完成信令消息转发, 这样的处理方式有效的避免时 延和带宽浪费。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优点: 通过应用本发明实施例所提出的技术方案, 通过信令节点对其相邻的信 令节点之间的连接的状态检测, 及时发现连接故障, 并在出现故障时, 应用 相应的记录和通知机制, 使得各相关的信令节点能够准确的获取路由状态信 息, 并选择替换路由, 从而, 使信令节点在进行信令消息转发时可以根据准 确的路由状态信息, 选择可达路由进行信令消息转发, 解决现有的路由机制 所带来的无效传送和消息时延的问题, 避免带宽浪费和对上层业务的影响。
下面, 结合具体的应用场景, 对本发明实施例所提出的技术方案进行进 一步的详细说明。 实施例一
在本实施例中, 对相对比较简单的路由末端连接发生故障的情况进行说 明。
为了便于说明, 本发明实施例提出一种具体的应用场景, 该应用场景中 各信令节点之间的连接关系如图 6所示, 相应的, 本发明实施俩所提出的技 术方案在该应用场景中的实现流程具体包括以下歩骤:
歩骤 S601 节点 A通过 SCTP层检测到自身的相邻节点 (节点 2 ) 的信 令连接不可用, 节点 A在本地记录到达节点 2的路由状态为不可达。
由于节点 A中包含节点 A与节点 2之间的连接的路由记录只有节点 A与 节点 2之间的路由, 所以, 节点 A所存储的其他路由不受影响。
并且, 由于节点 A与节点 2之间的路由并不存在替换路由, 所以, 节点 A需要将该故障通知其相邻的其他节点, 即继续执行歩骤 S602。
歩骤 S602、 节点 A通过 Diameter信令消息 (为本发明实施例中新增的 信令消息, 即前述的路由状态通知消息)向所有相邻的节点(节点 1、节点 B、 节点 C和节点 D)广播经过节点 A到节点 2的路由不可达的信息, 通知这些 节点不要再将到达节点 2的消息发给自己。
在实际的应 ^中,节点 A所广播的 Diameter信令消息的具体格式可以如 表 1所示:
表 i Diameter信令消息格式示意图
Figure imgf000013_0001
步骤 S603、 各相邻节点 (节点 、 节点 B、 节点 C和节点 D) 在接收到 播的 Diameter信令消息后, 记录到达节点 2的路由状态(通过节点 A的路 由不可达)。
在本实施例中, 节点 、 节点 B、 节点 C和节点 D中都存储了通过节点 A到达节点 2的路由, 所以, 可以认为上述的各节点都执行了歩骤 S603的操 作, 但如果不存在这样的路由, 例如, 如果节点 1作为终点节点, 并没有存 储通过节点 A到达节点 2的路由,那么,节点 1将不会记录这样的路由状态, 即对广播的 Diameter信令消息不予处理。
进一歩的, 由于节点 1、 节点 B、 节点 C和节点 D中都存在到达节点 2 的替换路由, 所以, 将不会继续进行该故障的通知消息广播。
步骤 S604、 当节点 B接收到目的地址为节点 2的主机名的信令消息时, 节点 B查看路由表及路由状态, 发现通过节点 A发给节点 2的路由不可达, 所以, 将不会向节点 A发送目的地址为节点 2的信令消息, 而是选择其他的 可用路由 (备用路由或负荷分担的其他路由) 发送该信令消息。
在如图 6所示的应用场景中, 节点 B所选择的路有可以是通过节点 C向 节点 2发送该信令消息,通过节点 C到达节点 2的路由即是通过节点 A达到 节点 2的路由的替换路由。
类似的, 如果节点 C或者节点 D接收到目的地址为节点 2的主机名的信 令消息, 相应的处理流程与步骤 S604相似, 在此不再重复, 另一方面, 如果 节点! [需要向节点 2发送信令消息, 那么, 相应的替换路由的选择流程同样 可以参考上述的歩骤 S604。
在实际应 ffi中, 考虑到广播消息有可能出现的未能成功送达的情况, 节 点 A的相邻节点有可能没有收到节点 A广播的 D meter信令消息,即节点 A 还是有可能从某一相邻节点(如节点 D)收到目的地址为节点 2的信令消息, 在此种情况下,节点 A将主动向节点 D发送 D meter信令消息,再次通知节 点 D通过节点 A到节点 2之间的路由不可达。
另外, 需要进一步指出的是, 由于连接故障的检测是相互的, 在节点 A 检测到故障的同时, 节点 2中同样可以检测到该故障, 但由于节点 2并不是 当前网络中的转接节点, 而是一个终端节点, 因此, 节点 2只需要记录故障, 而不需要进行广播。 进一歩的, 对于节点 A和节点 2之间的故障连接, 节点 A会继续进行相 应的检测, 以验证该连接的故障是否恢复, 相应的故障恢复检测过程如图 7 所示, 具体包括以下步骤:
歩骤 S701、 当节点 A通过 SCTP层检测到自身到节点 2的信令连接可用 时, 节点 A记录到达节点 2的路由状态为可达。
同样的, 由于节点 A中包含节点 A与节点 2之间的连接的路有记录只有 节点 A与节点 2之间的路由, 所以, 节点 A所存储的其他路由不受影响。
并且, 由于节点 A与节点 2之间的路由并不存在替换路由, 所以, 节点 A 需要将该故障已经恢复的消息通知其相邻的其他节点, 即继续执行歩骤 S702。
步骤 S702、节点 A发现自己到达节点 2的路由丛不可达变为可达后, 通 过 Diameter信令消息 (即前述的路由状态通知消息) 向所有相邻节点 (节点 1、 节点 B、 节点 C和节点 D) 广播经过节点 A到节点 2的路由可达的信息, 通知这些节点可以将到达节点 2的消息发给自己。
在实际的应用中,节点 A所广播的 Diameter信令消息的具体格式可以如 表 2所示:
表 2 Diameter信令消息格式示
Figure imgf000015_0001
步骤 S703、 各相邻节点 (节点 ] U 节点 B、 节点 C和节点 D) 在接收到 广播的 Diameter信令消息后, 记录到达节点 2的路由状态(通过节点 A的路 由可达)。
进一步的, 由于节点 1、 节点 B、 节点 C和节点 D中都存在到达节点 2 的替换路由, 所以, 将不会继续进行该故障的广播上报。
步骤 S704、 当节点 B接收到目的地址为节点 2的主机名的信令消息时, 节点] Β查看路由表及路 ώ状态, 发现通过节点 Α发给节点 2的路由可达, 所 以, 可以向节点 A发送目的地址为节点 2的信令消息。
当然, 由于其他路由的状态同样为可达, 所以, 节点 B也可以选择其他 的可用路由 (备用路由或负荷分担的其他路由) 发送该信令消息, 具体的选 择规则可以根据实际需要进行调整。
类似的, 如果节点 C或者节点 D接收到目的地址为节点 2的主机名的信 令消息, 相应的处理流程与步骤 S704相似, 在此不再重复, 另一方面, 如果 节点 1需要向节点 2发送信令消息, 那么, 相应的替换路由的选择流程同样 可以参考上述的步骤 S704。
需要特别指出的是, 如果在图 6所示的应用场景中, 到达节点 2的两条 连接均出现故障, 即出现如图 8所示的场景,, 那么, 网络中的任意节点都将 不能找到相应的替换路由, 因此, 各节点都会触发相应的故障广播, 并逐级 传递, 网络中的各级节点都将获知没有能够向节点 2发送信令消息的可达路 由, 当一个节点 (例如节点 3 ) 需要向节点 2发送信令消息时, 将直接获知 信令消息不可达, 避免了信令消息的无效传输。
在本实施例中, 对相对实施倒一更加复杂的路由中间连接发生故障的情 况进行说明
为了便于说明, 本发明实施倒提出一种具体的应用场景, 该应用场景中 各信令节点之间的连接关系如图 9所示, 相应的, 本发明实施例所提出的技 术方案在该应用场景中的实现流程具体包括以下歩骤:
歩骤 S90 节点 B通过 SCTP层检测到自身的相邻节点 (节点 A) 的信 令连接不可用, 节点 B在本地记录到达节点 A的路由状态为不可达。
由于节点 B中所存储的路由信息中,包含节点 B与节点 A之间的连接的 路有记录除了节点 B与节点 A之间的路由, 还包括节点 B通过节点 A到达 节点 1的路由, 以及节点 B通过节点 A到达节点 2的路由, 所以, 节点 B需 要对上述三条路由查询替换路由。
如果节点 B对于上述≡条路由都没有查询到替换路由, 那么, 节点 B需 要将该故障通知其相邻的其他节点, 即继续执行歩骤 S902。
歩骤 S902、节点 B通过 Diameter信令消息(即前述的路由状态通知消息) 向所有相邻的节点 (由于到节点 A的连接故障, 所以, 节点 B的相邻节点只 剩节点 E)广播经过节点 B到节点 A、节点 1和节点 2的路由不可达的信息, 通知节点 E不要再将到达节点 A、 节点 1或节点 2的消息发给自己。
在实际的应^中, 节点 B所广播的 Diameter信令消息的具体格式可以包 括两种, 即前述的分别发送和同时发送。
其中, 分别发送的 Diameter信令消息格式如表 3所示:
表 3 分别发送的 D metei:信令消息格式示意图
Figure imgf000017_0001
而同时发送的 Diameter信令消息格式如表 4所示:
表 4 同时发送的 D metei:信令消息格式示意图
Figure imgf000017_0002
步骤 S903、各相邻节点(节点 E)在接收到广播的 Diameter信令消息后, 记录到达节点 A、 节点 1和节点 2的路由状态 (均为通过节点 B的路由不可 达)。
在本实施例中, 节点 E中分别存储了通过节点 B到达节点 A、 节点 1和 节点 2的路由, 所以, 可以认为节点 E对上述的三条路由都执行了歩骤 S903 的操作, 但如果不存在其中的任意一条或多条的路由, 例如, 如果节点 E并 没有存储通过节点 B到达节点 A的路由, 那么, 节点 E将不会记录到达节点 A的路由状态, 即对广播的 Diameter信令消息中关于节点 A不可达的信息不 予处理。
进一步的, 由于节点 E中存在到达节点 2的替换路由, 所以, 将不会继 续进行该节点 2的路由不可达的故障的广播上报。
但是, 由于节点 E中不存在到达节点 A和节点 1的替换路由, 节点 E将 会向其相邻的其他节点广播 Diameter信令消息,通知其到节点 A和节点 1的 路由不可达。
通过这样的处理后, 节点 B将不会再收到到达节点 A、 节点 1和节点 2 的信令消息。
同时,由于节点 E同样上报了其到节点 A和节点 1的路由不可达的消息, 所以, 节点 E同样不会再接收到到达节点 A和节点 1的信令消息。
进一歩的, 由于节点 E直接向节点 3上报了其到节点 A和节点 的路由 不可达的消息, 所以, 当节点 3需要向节点 A和节点 1发送信令消息时, 将 直接获知信令消息不可达。
歩骤 S904、 当节点 E接收到目的地址为节点 2的主机名的信令消息时, 节点 E查看路由表及路由状态, 发现通过节点 B发给节点 2的路由不可达, 所以, 将不会向节点 B发送目的地址为节点 2的信令消息, 而是选择其他的 可用路由 (备用路由或负荷分担的其他路由) 发送该信令消息。
在如图 9所示的应用场景中, 节点 E所选择的路有可以是通过节点 D、 节点 C向节点 2发送该信令消息, 通过节点 D、 节点 C向节点 2即是通过节 点 B达到节点 2的路由的替换路由。
在实际应用中, 考虑到广播消息有可能出现的来能成功送达的情况, 节 点 E的相邻节点有可能没有收到节点 E广播的 Diameter信令消息, 即节点 E 还是有可能从某一相邻节点 (如节点 3 ) 收到目的地址为节点 1的信令消息, 在此种情况下, 节点 E将主动向节点 3发送 Diameter信令消息, 再次通知节 点 3通过节点 E到节点 1之间的路由不可达。
另外, 需要进一歩指出的是, 由于连接故障的检测是相互的, 在节点 B 检测到故障的同时, 节点 A中同样可以检测到该故障, 在实际应 ^中, 由于 节点 A同样是一个转接节点, 所以, 节点 A可以同样采用上述流程进行故障 记录和广播, 即在本地记录自身到节点 B之间的路由不可达, 并在判断是否 存在替换路由, 如果本地没有存储替换路由, 则会广播该故障, 如图 9所示, 由于到节点 B的连接己经发生故障, 所以, 节点 A实际需要向节点 I和节点 2发送 Diameter信令消息, 而如果节点 2的本地存储了替换路由 (例如通过 节点 C、节点 D、节点 E到达节点 B的路由),则节点 2将不会进行广播操作, 而对于节点 1, 虽然其没有存储到达节点 B的替换路由, 但是, 其已经是广 播的终点, 所以, 也可以不再继续进行广播, 具体的处理流程参见上述说明, 在此不再赘述。
与现有技术相比, 本发明实施俩所提出的技术方案具有以下优点: 通过应用本发明实施例所提出的技术方案, 通过信令节点对其相邻的信 令节点之间的连接的状态检测, 及时发现连接故障, 并在出现故障时, 应用 相应的记录和通知机制, 使得各相关的信令节点能够准确的获取路由状态信 息, 并选择替换路由, 丛而, 使信令节点在迸行信令消息转发时可以根据准 确的路由状态信息, 选择可达路由进行信令消息转发, 解决现有的路由机制 所带来的无效传送和消息时延的问题, 避免带宽浪费和对上层业务的影响。 为了实现本发明实施例的技术方案, 本发明实施例还提供了一种信令节 点, 其结构示意图如图 10所示, 包括:
存储模块 101, 用于存储信令节点所对应的路由信息;
检测模块 102 , 用于检测信令节点与各相邻信令节点之间的连接状态; 记录模块 103, 用于当检测模块 102检测到信令节点与至少一个相邻的 信令节点之间的连接发生故障时, 将存储模块 101所存储的各包括发生故障 的连接的路由的路由状态记录为不可达;
判断模块 104, 用于在该信令节点为转接节点时, 分别判断存储模块 101 所存储的各包括发生故障的连接的路由是否存在替换路由;
广播模块 105, 用于在判断模块 104的判断结果为不存在时, 向信令节 点的各相邻信令节点广播路由状态通知消息, 路由状态通知消息指示信令节 点与不存在替换路由的路由的目的节点之间的路由不可达。
其中, 记录模块 103将存储模块 101所存储的各包括发生故障的连接的 路由的路由状态记录为不可达之后, 各功能模块还可以实现相应的故障恢复 检测过程, 具体说明如下:
检测模块 102 , 还用于对发生故障的连接进行检测; 记录模块 03, 还用于当检測模块 102检測到发生故障的连接的故障恢 复时, 将存储模块 10 所存储的各包括故障恢复的连接的路由的路由状态记 录为可达;
判断模块 104, 还用于在该信令节点为转接节点时, 分别判断存储模块 101所存储的各包括故障恢复的连接的路由是否存在替换路由;
广播模块 105, 还用于在判断模块】04的判断结果为不存在时, 向信令 节点的各相邻信令节点广播路由状态通知消息, 路由状态通知消息指示信令 节点与不存在替换路由的路由的目的节点之间的路由可达。
进一歩的, 该信令节点还包括:
接收模块 106, 用于接收到信令节点的各相邻信令节点所发送的路由状 存储模块 101, 还用于当接收模块】06所接收到的路由状态通知消息指 示相邻信令节点与至少一个目的节点之间的路由不可达时, 查询自身是否存 储了通过相邻信令节点到达至少一个目的节点的路由;
记录模块 103, 还用于在存储模块 101 的查询结果为是时, 将存储模块 101 所存储的各通过相邻信令节点到达至少一个目的节点的路由的路由状态 记录为不可达;
判断模块 104, 还用于在该信令节点为转接节点时, 分别判断存储模块 101 所存储的各通过相邻信令节点到达至少一个目的节点的路由是否存在替 换路 :
广播模块 105, 还用于在判断模块 104的判断结果为不存在时, 向信令 节点的各相邻信令节点广播路由状态通知消息, 路由状态通知消息指示信令 节点与至少一个目的节点之间的路由不可达。
在另一种具体的应用场景中, 存储模块 101 , 还用于当接收模块 106所 接收到的路由状态通知消息指示相邻信令节点与至少一个目的节点之间的路 由可达时, 查询自身是否存储了通过相邻信令节点到达至少一个目的节点的 路由;
记录模块 103, 还用于在存储模块 101 的查询结果为是时, 将存储模块 101 所存储的各通过相邻信令节点到达至少一个目的节点的路由的路由状态 记录为可达;
判断模块 104, 还用于在该信令节点为转接节点时, 分别判断存储模块 101 所存储的各通过相邻信令节点到达至少一个目的节点的路由是否存在替 广播模块 05, 还用于在判断模块 104的判断结果为不存在时, 向信令 节点的各相邻信令节点广播路由状态通知消息, 路由状态通知消息指示信令 节点与至少一个目的节点之间的路由可达。
需要进一步指出的是, 当判断模块】04判断存储模块 101所存储的不存 在替换路由的路由所对应的目的节点为多个时, 广播模块 105 , 具体用于: 分别向信令节点的各相邻信令节点广播多条路由状态通知消息, 各路由 状态通知消息中分别携带各多个目的节点的信息; 或,
向信令节点的各相邻信令节点广播路由状态通知消息, 路由状态通知消 息中携带全部多个目的节点的信息。
另一方面, 接收模块 106, 还用于接收待转发信令消息, 信令节点, 还 包括:
转发模块 107, 用于在接收模块 106接收到待转发信令消息时, 查询存 储模块 101所存储的与待转发信令消息的目的节点相对应的各路由的路由状 态, 并通过路由状态为可达的路由向目的节点转发待转发信令消息。
与现有技术相比, 本发明实施例所提出的技术方案具有以下优点: 通过应用本发明实施例所提出的技术方案, 通过信令节点对其相邻的信 令节点之间的连接的状态检测, 及时发现连接故障, 并在出现故障时, 应用 相应的记录和通知机制, 使得各相关的信令节点能够准确的获取路由状态信 息, 并选择替换路由, 从而, 使信令节点在进行信令消息转发时可以根据准 确的路由状态信息, 选择可达路由进行信令消息转发, 解决现有的路由机制 所带来的无效传送和消息时延的问题, 提高信令消息转发效率。 通过以上的实施方式的描述, 本领域的技术人员可以清楚地了解到本发 明实施倒可以通过硬件实现, 也可以借助软件加 ^要的通用硬件平台的方式 来实现。 基于这样的理解, 本发明实施例的技术方案可以以软件产品的形式 体现出来,该软件产品可以存储在一个非易失性存储介质(可以是 CD- ROM, U 盘, 移动硬盘等) 中, 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, 或网络设备等) 执行本发明实施例各个实施场景所述的 方法。
本领域技术人员可以理解附图只是一个优选实施场景的示意图, 險图中 的模块或流程并不一定是实施本发明实施例所必须的。
本领域技术人员可以理解实施场景中的装置中的模块可以按照实施场景 描述进行分布于实施场景的装置中, 也可以迸行相应变化位于不同于本实施 场景的一个或多个装置中。 上述实施场景的模块可以合并为一个模块, 也可 以迸一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述, 不代表实施场景的优劣。
以上公开的仅为本发明实施例的几个具体实施场景, 但是, 本发明实施 例并非局限于此, 任何本领域的技术人员能思之的变化都应落入本发明实施 倒的业务限制范围。

Claims

u 一种应用层信令路由保护方法, 其特征在于, 包括以下步骤: 信令节点检测自身与各相邻信令节点之间的连接状态;
当所述信令节点检测到自身与至少一个相邻的信令节点之间的连接发生 故障时, 所述信令节点将自身存储的各包括所述发生故障的连接的路由的路 由状态记录为不可达;
如果所述信令节点为转接节点, 所述信令节点分别判断自身所存储的各 包括所述发生故障的连接的路由是否存在替换路由;
如果判断结果为不存在, 所述信令节点向自身的各相邻信令节点广播路 由状态通知消息, 所述路由状态通知消息指示所述信令节点与所述不存在替 换路由的路由的目的节点之间的路由不可达。
2、 如权利要求 1所述的方法, 其特征在于, 所述信令节点将自身存储的 各包括所述发生故障的连接的路由的路由状态记录为不可达之后, 还包括: 所述信令节点对所述发生故障的连接进行检测;
当所述信令节点检测到所述发生故障的连接的故障恢复时, 所述信令节 点将自身存储的各包括所述故障恢复的连接的路由的路由状态记录为可达; 如果所述信令节点为转接节点, 所述信令节点分别判断自身所存储的各 包括所述故障恢复的连接的路由是否存在替换路由;
如果判断结果为不存在, 所述信令节点向自身的各相邻信令节点广播路 由状态通知消息, 所述路由状态通知消息指示所述信令节点与所述不存在替 换路由的路由的目的节点之间的路由可达。
3、 如权利要求 1或 2所述的方法, 其特征在于, 所述信令节点检测自身 与各相邻信令节点之间的连接状态, 或对所述发生故障的连接进行检测的方 式具体为:
通过流控制传输协议 SCTP层消息进行检测。
4、 如权利要求 1所述的方法, 其特征在于, 当所述信令节点接收到自身 的相邻信令节点发送的路由状态通知消息时, 所述方法还包括:
所述信令节点识别所述路由状态通知消息的内容; 当所述信令节点识别所述路由状态通知消息指示所述相邻信令节点与至 少一个目的节点之间的路由不可达时, 所述信令节点判断自身是否存储了通 过所述相邻信令节点到达所述至少一个目的节点的路由;
如果判断结果为是, 所述信令节点将自身存储的各通过所述相邻信令节 点到达所述至少一个目的节点的路由的路由状态记录为不可达;
如果所述信令节点为转接节点, 所述信令节点分别判断自身所存储的各 通过所述相邻信令节点到达所述至少一个目的节点的路由是否存在替换路 如果判断结果为不存在, 所述信令节点向自身的各相邻信令节点广播路 由状态通知消息, 所述路由状态通知消息指示所述信令节点与所述至少一个 目的节点之间的路由不可达。
5、 如权利要求 4所述的方法, 其特征在于, 所述信令节点识别所述路由 状态通知消息的内容之后, 还包括:
当所述信令节点识别所述路由状态通知消息指示所述相邻信令节点与至 少一个目的节点之间的路由可达时, 所述信令节点判断自身是否存储了通过 所述相邻信令节点到达所述至少一个目的节点的路由;
如果判断结果为是, 所述信令节点将自身存储的各通过所述相邻信令节 点到达所述至少一个目的节点的路由的路由状态记录为可达;
如果所述信令节点为转接节点, 所述信令节点分别判断自身所存储的各 通过所述相邻信令节点到达所述至少一个目的节点的路由是否存在替换路 如果判断结果为不存在, 所述信令节点向自身的各相邻信令节点广播路 由状态通知消息, 所述路由状态通知消息指示所述信令节点与所述至少一个 目的节点之间的路由可达。
6、 如权利要求 1、 2、 4或 5中任意一项所述的方法, 其特征在于, 所述 路由状态通知消息, 具体包括:
至少一个目的节点的主机名、 发送所述路由状态通知消息的信令节点的 主机名, 以及路由状态;
其中, 所述路由状态用于记录通过所述信令节点到目的节点的路由是否 可达。
7、 如权利要求 1、 2、 4或 5中任意一项所述的方法, 其特征在于, 当所 述信令节点判断自身所存储的不存在替换路由的路由所对应的目的节点为多 个时, 所述信令节点向自身的各相邻信令节点广播路由状态通知消息, 具体 包括:
所述信令节点分别向自身的各相邻信令节点广播多条路由状态通知消 息, 各所述路由状态通知消息中分别携带各所述多个目的节点的信息; 或, 所述信令节点向自身的各相邻信令节点广播路由状态通知消息, 所述路 由状态通知消息中携带全部所述多个目的节点的信息。
8、 如权利要求 1、 2、 4或 5中任意一项所述的方法, 其特征在于, 还包 括:
当所述信令节点接收到待转发信令消息时, 所述信令节点确定所述待转 发信令消息的目的节点;
所述信令节点识别自身存储的与所述待转发信令消息的目的节点相对应 的各路由的路由状态;
所述信令节点通过路由状态为可达的路由向所述目的节点转发所述待转 发信令消息。
9、 一种信令节点, 其特征在于, 包括:
存储模块, 用于存储所述信令节点所对应的路由信息;
检测模块, ^于检测所述信令节点与各相邻信令节点之间的连接状态; 记录模块, 用于当所述检测模块检测到所述信令节点与至少一个相邻的 信令节点之间的连接发生故障时, 将所述存储模块所存储的各包括所述发生 故障的连接的路由的路由状态记录为不可达;
判断模块, 用于在所述信令节点为转接节点时, 分别判断所述存储模块 所存储的各包括所述发生故障的连接的路由是否存在替换路由;
广播模块, 用于在所述判断模块的判断结果为不存在时, 向所述信令节 点的各相邻信令节点广播路由状态通知消息, 所述路由状态通知消息指示所 述信令节点与所述不存在替换路由的路由的目的节点之间的路由不可达。
10、 如权利要求 9所述的信令节点, 其特征在于, 所述检测模块, 还用于对所述发生故障的连接进行检测;
所述记录模块, 还用于当所述检测模块检测到所述发生故障的连接的故 障恢复时, 将所述存储模块所存储的各包括所述故障恢复的连接的路由的路 由状态记录为可达;
所述判断模块, 还用于在所述信令节点为转接节点时, 分别判断所述存 储模块所存储的各包括所述故障恢复的连接的路由是否存在替换路由;
所述广播模块, 还用于在所述判断模块的判断结果为不存在时, 向所述 信令节点的各相邻信令节点广播路由状态通知消息, 所述路由状态通知消息 指示所述信令节点与所述不存在替换路由的路由的目的节点之间的路由可 达。
1 1、 如权利要求 9所述的信令节点, 其特征在于, 还包括:
接收模块, 用于接收到所述信令节点的各相邻信令节点所发送的路由状 所述存储模块, 还用于当所述接收模块所接收到的路由状态通知消息指 示所述相邻信令节点与至少一个目的节点之间的路由不可达时, 查询自身是 否存储了通过所述相邻信令节点到达所述至少一个目的节点的路由;
所述记录模块, 还用于在所述存储模块的查询结果为是时, 将所述存储 模块所存储的各通过所述相邻信令节点到达所述至少一个目的节点的路由的 路由状态记录为不可达;
所述判断模块, 还用于分别判断所述存储模块所存储的各通过所述相邻 信令节点到达所述至少一个目的节点的路由是否存在替换路由;
所述广播模块, 还用于在所述判断模块的判断结果为不存在时, 向所述 信令节点的各相邻信令节点广播路由状态通知消息, 所述路由状态通知消息 指示所述信令节点与所述至少一个目的节点之间的路由不可达。
12、 如权利要求 11所述的信令节点, 其特征在于,
所述存储模块, 还用于当所述接收模块所接收到的路由状态通知消息指 示所述相邻信令节点与至少一个目的节点之间的路由可达时, 查询自身是否 存储了通过所述相邻信令节点到达所述至少一个目的节点的路由;
所述记录模块, 还用于在所述存储模块的查询结果为是时, 将所述存储 模块所存储的各通过所述相邻信令节点到达所述至少一个目的节点的路由的 路由状态记录为可达;
所述判断模块, 还用于在所述信令节点为转接节点时, 分别判断所述存 储模块所存储的各通过所述相邻信令节点到达所述至少一个目的节点的路由 是否存在替换路 [:1:];
所述广播模块, 还用于在所述判断模块的判断结果为不存在时, 向所述 信令节点的各相邻信令节点广播路由状态通知消息, 所述路由状态通知消息 指示所述信令节点与所述至少一个目的节点之间的路由可达。
13、 如权利要求 9至 12中任意一项所述的信令节点, 其特征在于, 当所 述判断模块判断所述存储模块所存储的不存在替换路由的路由所对应的目的 节点为多个时, 所述广播模块, 具体用于:
分别向所述信令节点的各相邻信令节点广播多条路由状态通知消息, 各 所述路由状态通知消息中分别携带各所述多个目的节点的信息; 或,
向所述信令节点的各相邻信令节点广播路由状态通知消息, 所述路由状 态通知消息中携带全部所述多个目的节点的信息。
14、 如权利要求 11所述的信令节点, 其特征在于, 所述接收模块, 还用 于接收待转发信令消息, 所述信令节点, 还包括:
转发模块, 用于在所述接收模块接收到待转发信令消息时, 查询所述存 储模块所存储的与所述待转发信令消息的目的节点相对应的各路由的路由状 态,并通过路由状态为可达的路由向所述目的节点转发所述待转发信令消息。
15、 一种包括指令的计算机程序, 当被处理器执行时所述指令被安排成 使得所述处理器执行如权利要求 1至 8中任意一项所述的方法。
16、 一种存储如权利要求 15所述的 算机程序的存储介质。
PCT/CN2012/070576 2011-01-28 2012-01-19 一种应用层信令路由保护方法、设备、计算机程序和存储介质 WO2012100711A1 (zh)

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