CN102625345B - A kind of application layer signalling route guard method and equipment - Google Patents
A kind of application layer signalling route guard method and equipment Download PDFInfo
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Abstract
The embodiment of the invention discloses the guard method of a kind of application layer signalling route, by the technical scheme that the application embodiment of the present invention proposes, by the state-detection that signaling node connects the signaling between its adjacent signaling node, Timeliness coverage connects fault, and when breaking down, the corresponding record of application and informing mechanism, make each relevant signaling node can obtain routing state information accurately, and select to replace route, thus, make signaling node can according to signalling route state information accurately when carrying out signaling message and forwarding, selection can reach route and carry out signaling message forwarding, solve the problem of the invalid transmission that brings of mechanism of existing signalling route and Message Time Delay, avoid bandwidth waste and the impact on upper-layer service.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the guard method of a kind of application layer signalling route and equipment.
Background technology
At existing LTE (Long Term Evolution, Long Term Evolution) in network, by SAE (SystemArchitecture Evolution, system framework evolution) for LTE user provides mobile management and service bearer passage, its network configuration as shown in Figure 1.
When LTE user roams into visited place MME (Mobile Management Entity, mobile management entity) under network element time, MME can upgrade and authorizing procedure to user attaching HSS (Home Subscriber Server, home subscriber server) launch position.These flow processs are all adopt Diameter (diameter protocol in SAE network, follow-on aaa protocol standard) realize, signaling protocol stack is Diameter/SCTP (Stream Control Transmission Protocol, SCTP)/IP (Internet Protocol, network interconnection agreement).Under LTE user in a HSS can roam into any one MME network element of the whole network, the user also namely under a MME may belong to any one HSS of the whole network, just there is full annexation between such the whole network MME and the whole network HSS.In order to maintenance management is convenient, realizing in Diameter message route, using DRA (Diameter Routing Agent, Diameter route agent) network element, to be transferred all signalings between MME and HSS by DRA, to avoid entirely connecting the whole network data configuring maintenance problem brought, apply the structural representation of the network system of DRA in prior art as shown in Figure 2.Wherein:
The Diameter nodes such as MME and HSS can regard source node or the destination node of Diameter signaling as, support Diameter/SCTP/IP protocol stack.
Wherein, the Diameter layer of source/destination node completes the interface signaling process process such as location updating, and the addressing of Diameter signaling and route.Diameter signaling addressing system specifically comprises IMSI (International Mobile Subscriber Identification Number, international mobile subscriber identity) addressing, domain name addressing and host name addressing.When adopting IMSI addressing, domain name addressing system, source node does not know the host name of destination node; When adopting host name addressing, source node must know the host name of destination node.Diameter does not have clear stipulaties signalling route mode, and just description can adopt active and standby route and load sharing routing mode.Diameter does not define routing mechanism, and Diameter node does not record, do not detect, be not delivered to the signalling route state of a destination node (whether can reach).
DRA can regard the via node of Diameter signaling as, also supports Diameter/SCTP/IP protocol stack.
Wherein, the Diameter layer of via node does not carry out interface signaling process process, only completes the addressing of Diameter signaling and route.Via node supports IMSI addressing, domain name addressing and host name addressing, and when adopting IMSI addressing, domain name addressing system, via node has needed address translation, and IMSI is become destination host name with domain name translation; When adopting host name addressing, via node has only needed signal switching.Via node also can adopt active and standby route and load sharing routing mode.Via node does not also record, do not detect, be not delivered to the signalling route state of a destination node (whether can reach).
In existing Diameter signalling route mechanism, 1 signaling message to be selected a signaling to connect according to routing algorithm to mail to 1 DRA by source node, the signaling tandem aspect formed by DRA node by this signaling message route to destination node.After DRA nodes some in signaling tandem aspect receive this signaling message, the SCTP signaling disconnecting between down hop DRA node detected, cannot deliver to this message, this node can return an errored response by upper hop node, tells that its this message cannot be delivered to destination.After upper hop node receives this errored response, check whether other routes (other routes of alternate routing or load sharing) are also had to this message, if any, other routes of selection are resend this message.This node does not record the route that this message cannot be sent to, and the follow-up message received directly is not selected to the re-transmission route of transmitted message yet, therefore still can continue to send from the route that cannot send to for the follow-up message that receives.
Realizing in process of the present invention, inventor finds prior art, and at least there are the following problems:
There is protection mechanism in above-mentioned Diameter signalling route mechanism, when the primary route arranged is unreachable, other routes can be selected to resend for a signaling message.But the message for follow-up transmission does not have route protection mechanism.This is that Diameter carries out the feature of Message routing as application layer protocol.
Based on such feature, when Diameter node or link failure, the errored response for message can realize the re-transmission of this message, ensures reliably to transmit, but subsequent message still can continue to transmit in unreachable route, size of message and Message Time Delay is caused to increase.
Summary of the invention
The object of the present invention is to provide the guard method of a kind of application layer signalling route and equipment, realize, to the timely detection of routing state, reducing the Message Time Delay caused because of erroneous retransmissions, for this reason, the embodiment of the present invention adopts following technical scheme:
The guard method of a kind of application layer signalling route, comprises the following steps:
Signaling node detects the connection status between self and each adjacent signaling node;
When the connection between described signaling node detects the signaling node that self is adjacent with at least one is broken down, the routing state of the route of the connection of breaking down described in what self stored by described signaling node respectively comprise is recorded as unreachable;
If described signaling node is transit node, whether the route of the connection of breaking down described in what described signaling node judged self to store respectively respectively comprise exists replacement route;
If judged result is not for exist, described signaling node to each adjacent signaling node broadcast state notification message of self, described routing state notification message indicate described signaling node and the described route do not existed between the destination node of replacing route unreachable.
A kind of signaling node, comprising:
Memory module, for storing the routing iinformation corresponding to described signaling node;
Detection module, for detecting the connection status between described signaling node and each adjacent signaling node;
Logging modle, when connection for detecting between the signaling node that described signaling node is adjacent with at least one when described detection module is broken down, described memory module is stored respectively comprise described in the routing state of the route of connection that breaks down be recorded as unreachable;
Judge module, for when described signaling node is transit node, judge that described memory module stores respectively respectively comprise described in the route of connection that breaks down whether there is replacement route;
Broadcast module, for when the judged result of described judge module is not for existing, to each adjacent signaling node broadcast state notification message of described signaling node, described routing state notification message indicates the route between described signaling node and the described destination node that there is not the route of replacing route unreachable.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By the technical scheme that the application embodiment of the present invention proposes, by the state-detection of signaling node to the connection between its adjacent signaling node, Timeliness coverage connects fault, and when breaking down, the corresponding record of application and informing mechanism, make each relevant signaling node can obtain routing state information accurately, and select to replace route, thus, make signaling node can according to routing state information accurately when carrying out signaling message and forwarding, selection can reach route and carry out signaling message forwarding, solve the problem of invalid transmission that existing routing mechanism brings and Message Time Delay, avoid bandwidth waste and the impact on upper-layer service.
Accompanying drawing explanation
Fig. 1 is the structural representation of SAE network of the prior art;
Fig. 2 is the schematic network structure applying DRA in prior art;
The schematic flow sheet of a kind of application layer signalling route guard method that Fig. 3 proposes for the embodiment of the present invention;
The schematic flow sheet of a kind of application layer signalling route guard method in fault recovery testing process that Fig. 4 embodiment of the present invention proposes;
The schematic flow sheet of the processing procedure of a kind of application layer signalling route guard method after receiving routing state notification message that Fig. 5 embodiment of the present invention proposes;
A kind of schematic diagram applying application layer signalling route guard method embody rule scene that Fig. 6 proposes for the embodiment of the present invention;
A kind of schematic diagram applying application layer signalling route guard method embody rule scene that Fig. 7 proposes for the embodiment of the present invention;
A kind of schematic diagram applying application layer signalling route guard method embody rule scene that Fig. 8 proposes for the embodiment of the present invention;
A kind of schematic diagram applying application layer signalling route guard method embody rule scene that Fig. 9 proposes for the embodiment of the present invention;
The structural representation of a kind of signaling node that Figure 10 proposes for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, carry out clear, complete description to the technical scheme in the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
As shown in Figure 3, be the schematic flow sheet of a kind of application layer signalling route guard method that the embodiment of the present invention proposes, specifically comprise the following steps:
Step S301, signaling node detect the connection status between self and each adjacent signaling node.
Step S302, when the connection between signaling node detects the signaling node that self is adjacent with at least one is broken down, the routing state respectively comprising the route of the connection of breaking down that self stores by signaling node is recorded as unreachable.
If this signaling node of step S303 is transit node, signaling node judges whether the route respectively comprising the connection of breaking down self stored exists replacement route respectively.
If judged result is not for exist, perform step S304;
If judged result is for existing, then terminate this operation.
Step S304, signaling node are to each adjacent signaling node broadcast state notification message of self, and the route of this routing state notification message instruction between this signaling node and the destination node that there is not the route of replacing route is unreachable.
By above-mentioned handling process, signaling node can detect the state of the connection between self and adjacent signaling node in time, when finding to connect fault, the routing state comprising the route that this fault connects stored this locality is labeled as unreachable, thus, complete this locality adjustment and the record of routing state.
Meanwhile, above-mentioned step S303 to step S304 is then the judgement handling process whether reported this fault.
If found the replacement route of unreachable route in step S303, so, this signaling node will without the need to reporting this fault further, because, the signaling message of the destination node being forwarded to some unreachable routes that what even if the signaling node receiving upper level sended over need, also corresponding forwarding can be completed by replacing route.For the signaling node of the upper level of this signaling message of transmission, this signaling message is all that the signaling node forwarding that there is unreachable route by this gives destination node, so the signaling node of upper level is without the need to knowing the situation of the connection of this fault or unreachable route.
And if do not find the replacement route of unreachable route in step S303, so, this signaling node needs to report further this fault, concrete reporting schemes is then the broadcast mode by step S304, be broadcast to all adjacent signaling nodes, corresponding signaling node is according to the corresponding fault message of situation record of self.In the case, if there is signaling node to need to send signaling message to the destination node of unreachable route, so, owing to having known that the signaling message mailing to this destination node does not exist unreachable route signaling node by this this is sent in advance, so, can not trigger this unreachable route and forward operation accordingly, but select other routes to carry out signaling message forwarding, avoid the invalid transmission of signaling message.
It is to be noted; in step S301; concrete detected rule can be time-based; such as periodically detect or timing detection; also can based on other conditions, such as event detection trigger or instruction triggers detect, in the application scenarios of reality; which kind of detected rule of embody rule can need according to actual scene and adjust, and such change does not affect protection scope of the present invention.
On the other hand, the repetitive operation that flow process in order to avoid above-mentioned steps S301 to step S304 connects for same fault, processing procedure in step S301 can only detect for the current connection of failure logging that do not have, and for the connection of fault being detected, then carry out the check processing continued according to following fault recovery testing process.
The routing state respectively comprising the route of the connection of breaking down self stored at signaling node be recorded as unreachable after, the embodiment of the present invention further provides fault recovery testing process, and its schematic flow sheet as shown in Figure 4, specifically comprises the following steps:
Step S401, signaling node detect the connection of breaking down.
Step S402, when signaling node detects the fault recovery of the connection of breaking down, the routing state respectively comprising the route of the connection of fault recovery that self stores by signaling node is recorded as and can reaches.
If this signaling node of step S403 is transit node, signaling node judges whether the route respectively comprising the connection of fault recovery self stored exists replacement route respectively.
If judged result for existing, then completes this fault recovery testing process;
If judged result is not for exist, then perform step S404.
Step S404, signaling node are to each adjacent signaling node broadcast state notification message of self, and the route of this routing state notification message instruction between this signaling node and the destination node that there is not the route of replacing route can reach.
Similar with aforesaid explanation, by the handling process of above-mentioned step S401 to step S404, whether signaling node can detect the connection that self there is fault in time and recover, when finding to connect fault recovery, the routing state comprising the route of this connection that this locality stores is reverted to and can reach, thus, complete this locality adjustment and the record of routing state.
Meanwhile, above-mentioned step S403 to step S404 is then the judgement handling process whether reported this fault.
If found the replacement route of the route reverting to reachable state in step S403, so, can be determined by the explanation in aforesaid step S303, when this route is marked as unreachable, be not broadcast to other adjacent signaling node, therefore, when this route recovery is reachable state, also just there is no need to notify corresponding signaling node, only needed local routing state change and record.
Contrary, if there is no the replacement route finding to revert to the route of reachable state in step S403, so, can be determined by the explanation in aforesaid step S303 equally, when this route is marked as unreachable, this signaling node is notified of each adjacent signaling node by the mode of broadcast, therefore, when this route recovery is the routing state that can reach, same needs carry out such notice, namely by step S404, adopt mode that is similar and step S304, the notice that routing state becomes is carried out by routing state notification message, just unreachable in steps in S304 of the content of notice, change reaching in step S404 into.
By above-mentioned fault recovery testing process, when making fault connect recovery, signaling node can Timeliness coverage, and the routing state of the relevant route stored this locality recovers, and carry out reporting of corresponding routing state information change as required, thus, the network route of being correlated with is recovered, when making corresponding signaling node need to carry out signaling message transmission to this destination node reverting to the route of reachable state, this route still can be normally utilized to carry out signaling message forwarding.
It is further noted that; link detection in step S401 can adopt the detected rule be similar in step S301 to carry out equally; and; the rule of its application can be identical with the rule in step S301; also can be different; ensure the difference between fault detect and fault recovery detection; such as; make the sense cycle of fault recovery testing process shorter; the recovery of fault can be found in the very first time; or only after fault restoration, detected by the corresponding fault recovery of instruction triggers, such change does not affect protection scope of the present invention.
In the application of reality, the detection operation in above-mentioned step S301 and step S401 can have been come by SCTP layer message, and also can be undertaken by other agreements, the change of type of message can't affect protection scope of the present invention.
By aforesaid description, signaling node self is detected and triggers the flow process broadcasted and be illustrated, in same network system, signaling node can to adjacent signaling node broadcast state notification message, also the routing state notification message that adjacent signaling node is broadcasted likely is received, below, the handling process after signaling node receives routing state notification message is described, its schematic flow sheet as shown in Figure 5, specifically comprises the following steps:
The content of step S501, signaling node identification routing state notification message.
When signaling node identification routing state notification message indicates the route between adjacent signaling node and at least one destination node unreachable, perform step S502;
When signaling node identification routing state notification message indicates the route between adjacent signaling node and at least one destination node to reach, perform step S506.
Step S502, signaling node judge whether self stores the route being arrived at least one destination node by adjacent signaling node.
If judged result is yes, perform step S503;
If judged result is no, then directly terminates this operation, can not operate further according to this routing state notification message.
Because when judged result is no, show not exist in this signaling node any to should the routing iinformation of destination node in routing state notification message, therefore, any signaling message being sent to this destination node that needs all can not be forwarded by this signaling node, and this signaling node also carries out record with regard to there is no need to the route corresponding to this destination node.
The routing state respectively arriving the route of at least one destination node by adjacent signaling node that self stores by step S503, signaling node is recorded as unreachable.
If this signaling node of step S504 is transit node, whether the route respectively arriving at least one destination node by adjacent signaling node that signaling node judges self to store respectively exists replacement route.
If judged result is not for exist, perform step S505;
If judged result is for existing, then directly terminate this operation, the reason of this operation of concrete end is see the explanation in aforesaid step S303.
Step S505, signaling node are to each adjacent signaling node broadcast state notification message of self, and this routing state notification message indicates the route between this signaling node and at least one destination node unreachable.
Step S506, signaling node judge whether self stores the route being arrived at least one destination node by adjacent signaling node;
If judged result is yes, perform step S507;
If judged result is no, then directly terminate this operation, can not operate further according to this routing state notification message, corresponding reason is see step S502.
The routing state respectively arriving the route of at least one destination node by adjacent signaling node that self stores by step S507, signaling node is recorded as and can reaches.
If this signaling node of step S508 is transit node, whether the route respectively arriving at least one destination node by adjacent signaling node that signaling node judges self to store respectively exists replacement route.
If judged result is not for exist, perform step S509;
If judged result is for existing, then directly terminate this operation, the reason of this operation of concrete end is see the explanation in aforesaid step S403.
Step S509, signaling node are to each adjacent signaling node broadcast state notification message of self, and this routing state notification message indicates the route between this signaling node and at least one destination node to reach.
By above-mentioned explanation, the routing state record of the local route stored of message adjustment that the signaling node that this signaling node is adjacent according to self is broadcasted, and where necessary, further report operation.
In conjunction with the local fault detect described by aforesaid step S301 to step S304, local fault recovery described by step S401 to step S404 detects, and receive the record after broadcast and report flow described by step S501 to step S509, the fault message record of each signaling node this locality in network can be realized, and when there is route association, fault message transmission is realized between the signaling node of each association, by such process, can make signaling node in time for fault Route Selection replaces route, and when not replacing route, report upper level signaling node, the selection of replacing route is carried out by upper level signaling node, by such backtracking mode, as long as exist in any one-level signaling node in signaling message forward-path and replace route, would not occur that signaling message is sent to the signaling node that there is routing failure and can not by situation about normally forwarding, thus, effectively reduce inactive signaling transmission of messages, shorten signaling message time delay.
In concrete enforcement scene, the structure of above-mentioned routing state notification message, specifically comprises the host name of at least one destination node, sends the host name of the signaling node of described routing state notification message and routing state; Wherein, whether routing state can be reached by the route of this signaling node to destination node for recording.
Further, when the destination node do not existed corresponding to the route of replacing route that signaling node judges self to store is multiple, signaling node can be divided into following two kinds to the operation of each adjacent signaling node broadcast state notification message of self:
(1) send respectively
Signaling node broadcasts many routing state notification messages respectively to each adjacent signaling node of self, carries the information of each multiple destination node in each routing state notification message respectively.
(2) send simultaneously
Signaling node, to each adjacent signaling node broadcast state notification message of self, carries the information of whole multiple destination node in routing state notification message.
In actual applications, which kind of send mode that embody rule is above-mentioned, can't affect protection scope of the present invention.
So far, by above-mentioned each handling process, signaling node completes the record of routing state, when receiving signaling message to be forwarded, avoid selecting routing state to be that inaccessible route forwards, but select routing state to be that the route that can reach forwards, to ensure the normal transmission of signaling message, corresponding handling process is as follows:
When signaling node receives signaling message to be forwarded, signaling node determines the destination node of signaling message to be forwarded, the routing state of each route corresponding with the destination node of signaling message to be forwarded that signaling node identification self stores, and be that the route that can reach forwards signaling message to be forwarded to destination node by routing state.
As front, if in this signaling node to the routing state of some adjacent signaling nodes be unreachable, and do not replace route, so will notify adjacent signaling node, therefore, after notified message, each adjacent signaling node can not send should the signaling message of destination node of fault route to this signaling node, complete signaling message forwarding by replacing route, such processing mode effectively avoids time delay and bandwidth waste.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By the technical scheme that the application embodiment of the present invention proposes, by the state-detection of signaling node to the connection between its adjacent signaling node, Timeliness coverage connects fault, and when breaking down, the corresponding record of application and informing mechanism, make each relevant signaling node can obtain routing state information accurately, and select to replace route, thus, make signaling node can according to routing state information accurately when carrying out signaling message and forwarding, selection can reach route and carry out signaling message forwarding, solve the problem of invalid transmission that existing routing mechanism brings and Message Time Delay, avoid bandwidth waste and the impact on upper-layer service.
Below, in conjunction with concrete application scenarios, be that the technical scheme that force proposes is described in further detail to the present invention.
Embodiment one
In the present embodiment, connect situation about breaking down to relatively simple route end to be described.
For convenience of explanation, the embodiment of the present invention proposes a kind of concrete application scenarios, as shown in Figure 6, accordingly, the realization flow of the technical scheme that the embodiment of the present invention proposes in this application scenarios specifically comprises the following steps annexation in this application scenarios between each signaling node:
Step S601, node A detect that by SCTP layer the signaling of the adjacent node (node 2) of self connects unavailable, and the routing state that node A arrives node 2 at local record is unreachable.
Route record due to the connection comprised between node A and node 2 in node A only has the route between node A and node 2, so other routes that node A stores are unaffected.
Further, because the route between node A and node 2 does not exist replacement route, so node A needs its other adjacent nodes of this signalling trouble, namely continue to perform step S602.
Step S602, node A (are signaling message newly-increased in the embodiment of the present invention by Diameter signaling message, i.e. aforesaid routing state notification message) broadcast through the route inaccessible information of node A to node 2 to all adjacent nodes (node 1, Node B, node C and node D), notify that the message arriving node 2 is not issued oneself by these nodes again.
In the application of reality, the concrete form of the Diameter signaling message that node A broadcasts can be as shown in table 1:
Table 1 Diameter signaling message form schematic diagram
| Destination node host name | Via node host name | Routing state |
| Node 2 | Node A | Unreachable |
Step S603, each adjacent node (node 1, Node B, node C and node D) are after receiving the Diameter signaling message of broadcast, and record arrives the routing state (unreachable by the route of node A) of node 2.
In the present embodiment, the route being arrived node 2 by node A is all stored in node 1, Node B, node C and node D, so, can think that above-mentioned each node all performs the operation of step S603, but if there is no such route, such as, if node 1 is as peripheral node, do not store the route being arrived node 2 by node A, so, node 1 can not record such routing state, namely disregard the Diameter signaling message of broadcast.
Further, owing to all there is the replacement route arriving node 2 in node 1, Node B, node C and node D, so, the notification message broadcast of this fault can not be proceeded.
Step S604, when Node-B receiver is the signaling message of the host name of node 2 to destination address, Node B checks routing table and routing state, find that the route being issued node 2 by node A is unreachable, so, can not be the signaling message of node 2 to node A sending destination location, but select other available route (other routes of alternate routing or load sharing) to send this signaling message.
In application scenarios as shown in Figure 6, it can be send this signaling message by node C to node 2 that the road selected by Node B has, and namely the route being arrived node 2 by node C is the replacement route being reached the route of node 2 by node A.
Similar, if node C or node D receives the signaling message that destination address is the host name of node 2, corresponding handling process is similar to step S604, no longer repeat at this, on the other hand, if node 1 needs to send signaling message to node 2, so, corresponding selection flow process of replacing route equally can with reference to above-mentioned step S604.
In actual applications, consider the situation about sending to that fails that broadcast likely occurs, the adjacent node of node A does not likely receive the Diameter signaling message of node A broadcast, namely node A still likely receives from a certain adjacent node (as node D) signaling message that destination address is node 2, in such cases, node A initiatively will send Diameter signaling message to node D, again notify that node D is unreachable by the route between node A to node 2.
In addition, it is further noted that, because the detection connecting fault is mutual, while node A detects fault, in node 2, this fault can be detected equally, but due to node 2 be not the transit node in current network, but a terminal node, therefore, node 2 only needs record trouble, and does not need to broadcast.
Further, connect for the fault between node A and node 2, node A can proceed corresponding detection, and to verify whether the fault of this connection is recovered, corresponding fault recovery testing process as shown in Figure 7, specifically comprises the following steps:
Step S701, when by SCTP layer, node A detects that the signaling self arriving node 2 connects available, node A records and arrives the routing state of node 2 for reaching.
Same, because there is the route recording and only have between node A and node 2 on the road of the connection comprised between node A and node 2 in node A, so other routes that node A stores are unaffected.
Further, because the route between node A and node 2 does not exist replacement route, so node A needs its other the adjacent nodes of message informing this fault recovered, namely continue to perform step S702.
Step S702, node A find oneself arrive node 2 route from unreachable become can reach after, by the information that Diameter signaling message (i.e. aforesaid routing state notification message) can reach to the route of node 2 to all adjacent nodes (node 1, Node B, node C and node D) broadcast through node A, notify that the message of arrival node 2 can be issued oneself by these nodes.
In the application of reality, the concrete form of the Diameter signaling message that node A broadcasts can be as shown in table 2:
Table 2 Diameter signaling message form schematic diagram
| Destination node host name | Via node host name | Routing state |
| Node 2 | Node A | Can reach |
Step S703, each adjacent node (node 1, Node B, node C and node D) are after receiving the Diameter signaling message of broadcast, and record arrives the routing state (can be reached by the route of node A) of node 2.
Further, owing to all there is the replacement route arriving node 2 in node 1, Node B, node C and node D, so the broadcast that can not proceed this fault reports.
Step S704, when Node-B receiver is the signaling message of the host name of node 2 to destination address, Node B checks routing table and routing state, find that the route being issued node 2 by node A can be reached, so, can be the signaling message of node 2 to node A sending destination location.
Certainly, state due to other routes is similarly and can reaches, so Node B also can select other available route (other routes of alternate routing or load sharing) to send this signaling message, and concrete selective rule can adjust according to actual needs.
Similar, if node C or node D receives the signaling message that destination address is the host name of node 2, corresponding handling process is similar to step S704, no longer repeat at this, on the other hand, if node 1 needs to send signaling message to node 2, so, corresponding selection flow process of replacing route equally can with reference to above-mentioned step S704.
It needs to be noted, if in the application scenarios shown in Fig. 6, two connections arriving node 2 are all broken down, namely there is scene as shown in Figure 8, , so, arbitrary node in network all can not find and replace route accordingly, therefore, each node all can trigger the broadcast of corresponding fault, and transmit step by step, nodes at different levels in network all will know reached at the route not having to send signaling message to node 2, when a node (such as node 3) needs to send signaling message to node 2, to directly know that signaling message is unreachable, avoid the failed transmission of signaling message.
Embodiment two
In the present embodiment, the middle situation about breaking down that connects of the route that relative embodiment one is more complicated is described.
For convenience of explanation, the embodiment of the present invention proposes a kind of concrete application scenarios, as shown in Figure 9, accordingly, the realization flow of the technical scheme that the embodiment of the present invention proposes in this application scenarios specifically comprises the following steps annexation in this application scenarios between each signaling node:
Step S901, Node B detect that by SCTP layer the signaling of the adjacent node (node A) of self connects unavailable, and the routing state that Node B arrives node A at local record is unreachable.
Due in the routing iinformation that stores in Node B, there is the route recorded except between Node B and node A on the road comprising the connection between Node B and node A, also comprise Node B arrives node 1 route by node A, and Node B arrives the route of node 2 by node A, so Node B needs to replace route to above-mentioned three routing inquiries.
If Node B does not all inquire replacement route for above-mentioned three routes, so, Node B needs its other adjacent nodes of this signalling trouble, namely continues to perform step S902.
Step S902, Node B pass through Diameter signaling message (i.e. aforesaid routing state notification message) to all adjacent nodes (due to the connection fault to node A, so, the adjacent node only surplus node E of Node B) broadcast is through the route inaccessible information of Node B to node A, node 1 and node 2, and the message arriving node A, node 1 or node 2 is not issued oneself by notice node E again.
In the application of reality, the concrete form of the Diameter signaling message that Node B is broadcasted can comprise two kinds, namely aforesaid respectively send and send simultaneously.
Wherein, the Diameter signaling message form sent respectively is as shown in table 3:
The Diameter signaling message form schematic diagram that table 3 sends respectively
| Destination node host name | Via node host name | Routing state |
| Node A | Node B | Unreachable |
| Destination node host name | Via node host name | Routing state |
| Node 1 | Node B | Unreachable |
| Destination node host name | Via node host name | Routing state |
| Node 2 | Node B | Unreachable |
And the Diameter signaling message form sent is as shown in table 4 simultaneously:
The Diameter signaling message form schematic diagram that table 4 sends simultaneously
| Destination node host name | Via node host name | Routing state |
| Node A, node 1, node 2 | Node B | Unreachable |
Step S903, each adjacent node (node E) are after receiving the Diameter signaling message of broadcast, and record arrives the routing state (being by the route of Node B unreachable) of node A, node 1 and node 2.
In the present embodiment, the route being arrived node A, node 1 and node 2 by Node B is stored respectively in node E, so, can think that node E performs the operation of step S903 to above-mentioned three routes, but if there is no wherein any one or more route, such as, if node E does not store the route being arrived node A by Node B, so, node E can not record the routing state arriving node A, namely disregard about the inaccessible information of node A in the Diameter signaling message of broadcast.
Further, owing to there is the replacement route arriving node 2 in node E, so the broadcast that can not proceed the inaccessible fault of route of this node 2 reports.
But owing to there is not the replacement route arriving node A and node 1 in node E, node E to its other adjacent node broadcasts Diameter signaling messages, will notify that the route that it arrives node A and node 1 is unreachable.
After such process, Node B can not receive the signaling message arriving node A, node 1 and node 2 again.
Meanwhile, because node E has reported it to arrive the inaccessible message of route of node A and node 1 equally, so node E can not receive the signaling message arriving node A and node 1 equally again.
Further, because node E has reported it to arrive the inaccessible message of route of node A and node 1 directly to node 3, so, when node 3 needs to send signaling message to node A and node 1, will directly know that signaling message is unreachable.
Step S904, when to receive destination address be the signaling message of the host name of node 2 to node E, node E checks routing table and routing state, find that the route being issued node 2 by Node B is unreachable, so, can not be the signaling message of node 2 to Node B sending destination location, but select other available route (other routes of alternate routing or load sharing) to send this signaling message.
In application scenarios as shown in Figure 9, it can be send this signaling message by node D, node C to node 2 that the road selected by node E has, and is namely the replacement route being reached the route of node 2 by Node B by node D, node C to node 2.
In actual applications, consider the situation about sending to that fails that broadcast likely occurs, the adjacent node of node E does not likely receive the Diameter signaling message of node E broadcast, namely node E still likely receives from a certain adjacent node (as node 3) signaling message that destination address is node 1, in such cases, node E initiatively will send Diameter signaling message to node 3, again notifies that node 3 is unreachable by the route between node E to node 1.
In addition, it is further noted that, because the detection connecting fault is mutual, while Node B detects fault, this fault can be detected equally in node A, in actual applications, because node A is a transit node equally, so, node A can adopt above-mentioned flow process to carry out failure logging and broadcast equally, namely the route between local record self to Node B is unreachable, and judging whether to there is replacement route, if this locality does not store replacement route, then can broadcast this fault, as shown in Figure 9, because the connection to Node B is broken down, so, node A actual needs sends Diameter signaling message to node 1 and node 2, if and this locality of node 2 stores replacement route (such as by node C, node D, node E arrives the route of Node B), then node 2 can not carry out broadcast operation, and for node 1, although it does not store the replacement route arriving Node B, but, it has been the terminal of broadcast, so, also broadcast can no longer be proceeded, concrete handling process is see above-mentioned explanation, do not repeat them here.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By the technical scheme that the application embodiment of the present invention proposes, by the state-detection of signaling node to the connection between its adjacent signaling node, Timeliness coverage connects fault, and when breaking down, the corresponding record of application and informing mechanism, make each relevant signaling node can obtain routing state information accurately, and select to replace route, thus, make signaling node can according to routing state information accurately when carrying out signaling message and forwarding, selection can reach route and carry out signaling message forwarding, solve the problem of invalid transmission that existing routing mechanism brings and Message Time Delay, avoid bandwidth waste and the impact on upper-layer service.
In order to realize the technical scheme of the embodiment of the present invention, the embodiment of the present invention additionally provides a kind of signaling node, and its structural representation as shown in Figure 10, comprising:
Memory module 101, for storing the routing iinformation corresponding to signaling node;
Detection module 102, for detecting the connection status between signaling node and each adjacent signaling node;
Logging modle 103, when the connection for detecting between the signaling node that signaling node is adjacent with at least one when detection module 102 is broken down, the routing state respectively comprising the route of the connection of breaking down memory module 101 stored is recorded as unreachable;
Judge module 104, for when this signaling node is transit node, judges whether the route respectively comprising the connection of breaking down that memory module 101 stores exists replacement route respectively;
Broadcast module 105, for when the judged result of judge module 104 is not for existing, to each adjacent signaling node broadcast state notification message of signaling node, the route between routing state notification message indication signaling node and the destination node that there is not the route of replacing route is unreachable.
Wherein, the routing state respectively comprising the route of the connection of breaking down that memory module 101 stores by logging modle 103 be recorded as unreachable after, each functional module can also realize corresponding fault recovery testing process, is described as follows:
Detection module 102, also for detecting the connection of breaking down;
Logging modle 103, also for when detection module 102 detects the fault recovery of the connection of breaking down, the routing state respectively comprising the route of the connection of fault recovery memory module 101 stored is recorded as and can reaches;
Judge module 104, also for when this signaling node is transit node, judges whether the route respectively comprising the connection of fault recovery that memory module 101 stores exists replacement route respectively;
Broadcast module 105, also for when the judged result of judge module 104 is not for existing, to each adjacent signaling node broadcast state notification message of signaling node, the route between routing state notification message indication signaling node and the destination node that there is not the route of replacing route can reach.
Further, this signaling node also comprises:
Receiver module 106, the routing state notification message that each adjacent signaling node for receiving signaling node sends;
Memory module 101, also for when the routing state notification message received by receiver module 106 indicates the route between adjacent signaling node and at least one destination node unreachable, inquire about self and whether store the route being arrived at least one destination node by adjacent signaling node;
Logging modle 103, also for when the Query Result of memory module 101 is for being, the routing state respectively arriving the route of at least one destination node by adjacent signaling node memory module 101 stored is recorded as unreachable;
Judge module 104, also for when this signaling node is transit node, whether the route respectively arriving at least one destination node by adjacent signaling node judging that memory module 101 stores respectively exists replacement route;
Broadcast module 105, also for when the judged result of judge module 104 is not for existing, to each adjacent signaling node broadcast state notification message of signaling node, the route between routing state notification message indication signaling node and at least one destination node is unreachable.
In the application scenarios that another kind is concrete, memory module 101, also for when the routing state notification message received by receiver module 106 indicates the route between adjacent signaling node and at least one destination node to reach, inquire about self and whether store the route being arrived at least one destination node by adjacent signaling node;
Logging modle 103, also for when the Query Result of memory module 101 is for being, the routing state respectively arriving the route of at least one destination node by adjacent signaling node memory module 101 stored is recorded as and can reaches;
Judge module 104, also for when this signaling node is transit node, whether the route respectively arriving at least one destination node by adjacent signaling node judging that memory module 101 stores respectively exists replacement route;
Broadcast module 105, also for when the judged result of judge module 104 is not for existing, to each adjacent signaling node broadcast state notification message of signaling node, the route between routing state notification message indication signaling node and at least one destination node can reach.
It is further noted that when judge module 104 judges that the destination node do not existed corresponding to the route of replacing route that memory module 101 stores is multiple, broadcast module 105, specifically for:
Each adjacent signaling node respectively to signaling node broadcasts many routing state notification messages, carries the information of each multiple destination node in each routing state notification message respectively; Or,
To each adjacent signaling node broadcast state notification message of signaling node, in routing state notification message, carry the information of whole multiple destination node.
On the other hand, receiver module 106, also for receiving signaling message to be forwarded, signaling node, also comprises:
Forwarding module 107, for when receiver module 106 receives signaling message to be forwarded, the routing state of each route corresponding with the destination node of signaling message to be forwarded that inquiry memory module 101 stores, and be that the route that can reach forwards signaling message to be forwarded to destination node by routing state.
Compared with prior art, the technical scheme that the embodiment of the present invention proposes has the following advantages:
By the technical scheme that the application embodiment of the present invention proposes, by the state-detection of signaling node to the connection between its adjacent signaling node, Timeliness coverage connects fault, and when breaking down, the corresponding record of application and informing mechanism, make each relevant signaling node can obtain routing state information accurately, and select to replace route, thus, make signaling node can according to routing state information accurately when carrying out signaling message and forwarding, selection can reach route and carry out signaling message forwarding, solve the problem of invalid transmission that existing routing mechanism brings and Message Time Delay, improve signaling message forward efficiency.
Through the above description of the embodiments, those skilled in the art can be well understood to the embodiment of the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, the technical scheme of the embodiment of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform each method implementing described in scene of the embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is a schematic diagram preferably implementing scene, the module in accompanying drawing or flow process might not be that the enforcement embodiment of the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device implemented in scene can carry out being distributed in the device of enforcement scene according to implementing scene description, also can carry out respective change and being arranged in the one or more devices being different from this enforcement scene.The module of above-mentioned enforcement scene can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality implementing scene.
Be only the several concrete enforcement scene of the embodiment of the present invention above, but the embodiment of the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into the business limited field of the embodiment of the present invention.
Claims (12)
1. the guard method of application layer signalling route, is characterized in that, be applied in the network comprising multiple signaling node, the method comprises the following steps:
Signaling node detects the connection status between self and each adjacent signaling node, and wherein said signaling node detects the mode of the connection status between self and each adjacent signaling node, is specially: detected by SCTP layer message;
When the connection between described signaling node detects the signaling node that self is adjacent with at least one is broken down, the routing state of the route of the connection of breaking down described in what self stored by described signaling node respectively comprise is recorded as unreachable;
If described signaling node is transit node, whether the route of the connection of breaking down described in what described signaling node judged self to store respectively respectively comprise exists replacement route;
If judged result is not for exist, described signaling node is to each adjacent signaling node broadcast state notification message of self, and described routing state notification message indicates the route between described signaling node and the described destination node that there is not the route of replacing route unreachable;
Wherein, when the routing state notification message that the adjacent signaling node that described signaling node receives self sends, described method also comprises:
The content of routing state notification message described in described signaling node identification;
When the route described in described signaling node identification between the routing state notification message described adjacent signaling node of instruction and at least one destination node is unreachable, described signaling node judges self whether to store the route being arrived at least one destination node described by described adjacent signaling node;
If judged result is yes, what self stored by described signaling node is respectively recorded as unreachable by the routing state of the route of described adjacent signaling node arrival at least one destination node described;
If described signaling node is transit node, whether the route respectively arriving at least one destination node described by described adjacent signaling node that described signaling node judges self to store respectively exists replacement route;
If judged result is not for exist, described signaling node is to each adjacent signaling node broadcast state notification message of self, and described routing state notification message indicates the route between described signaling node and at least one destination node described unreachable.
2. the method for claim 1, is characterized in that, the routing state of the route of the connection of breaking down described in what self stored by described signaling node respectively comprise be recorded as unreachable after, also comprise:
Described signaling node detects described connection of breaking down;
When the fault recovery of the connection of breaking down described in described signaling node detects, the routing state respectively comprising the route of the connection of described fault recovery that self stores by described signaling node is recorded as and can reaches;
If described signaling node is transit node, described signaling node judges whether the route respectively comprising the connection of described fault recovery self stored exists replacement route respectively;
If judged result is not for exist, described signaling node is to each adjacent signaling node broadcast state notification message of self, and described routing state notification message indicates the route between described signaling node and the described destination node that there is not the route of replacing route to reach.
3. method as claimed in claim 2, is characterized in that, is describedly specially the mode that described connection of breaking down detects:
Detected by SCTP layer message.
4. the method for claim 1, is characterized in that, after the content of routing state notification message described in described signaling node identification, also comprises:
When the route described in described signaling node identification between the routing state notification message described adjacent signaling node of instruction and at least one destination node can reach, described signaling node judges self whether to store the route being arrived at least one destination node described by described adjacent signaling node;
If judged result is yes, what self stored by described signaling node is respectively recorded as can be reached by the routing state of the route of described adjacent signaling node arrival at least one destination node described;
If described signaling node is transit node, whether the route respectively arriving at least one destination node described by described adjacent signaling node that described signaling node judges self to store respectively exists replacement route;
If judged result is not for exist, described signaling node is to each adjacent signaling node broadcast state notification message of self, and described routing state notification message indicates the route between described signaling node and at least one destination node described to reach.
5. as the method in claim 1,2 or 4 as described in any one, it is characterized in that, described routing state notification message, specifically comprises:
The host name of at least one destination node, send the host name of the signaling node of described routing state notification message and routing state;
Wherein, whether described routing state can be reached by the route of described signaling node to destination node for recording.
6. as the method in claim 1,2 or 4 as described in any one, it is characterized in that, when the destination node do not existed corresponding to the route of replacing route that described signaling node judges self to store is multiple, described signaling node, to each adjacent signaling node broadcast state notification message of self, specifically comprises:
Described signaling node broadcasts many routing state notification messages respectively to each adjacent signaling node of self, carries the information of each described multiple destination node in each described routing state notification message respectively; Or,
Described signaling node, to each adjacent signaling node broadcast state notification message of self, carries the information of whole described multiple destination node in described routing state notification message.
7., as the method in claim 1,2 or 4 as described in any one, it is characterized in that, also comprise:
When described signaling node receives signaling message to be forwarded, described signaling node determines the destination node of described signaling message to be forwarded;
The routing state of each route corresponding with the destination node of described signaling message to be forwarded that described signaling node identification self stores;
Described signaling node is that the route that can reach forwards described signaling message to be forwarded to described destination node by routing state.
8. a signaling node, is characterized in that, comprising:
Memory module, for storing the routing iinformation corresponding to described signaling node;
Detection module, for detecting the connection status between described signaling node and each adjacent signaling node, wherein being detected the mode of the connection status between described signaling node and each adjacent signaling node, being specially: detected by SCTP layer message;
Logging modle, when connection for detecting between the signaling node that described signaling node is adjacent with at least one when described detection module is broken down, described memory module is stored respectively comprise described in the routing state of the route of connection that breaks down be recorded as unreachable;
Judge module, for when described signaling node is transit node, judge that described memory module stores respectively respectively comprise described in the route of connection that breaks down whether there is replacement route;
Broadcast module, for when the judged result of described judge module is not for existing, to each adjacent signaling node broadcast state notification message of described signaling node, described routing state notification message indicates the route between described signaling node and the described destination node that there is not the route of replacing route unreachable;
Receiver module, the routing state notification message that each adjacent signaling node for receiving described signaling node sends;
Wherein, described memory module, time also for indicating the route between described adjacent signaling node and at least one destination node unreachable when the routing state notification message received by described receiver module, inquire about the route self whether storing and arrived at least one destination node described by described adjacent signaling node;
Described logging modle, also for when the Query Result of described memory module is for being, what described memory module stored is respectively recorded as unreachable by the routing state of the route of described adjacent signaling node arrival at least one destination node described;
Described judge module, whether the route respectively arriving at least one destination node described by described adjacent signaling node also for judging that described memory module stores respectively exists replacement route;
Described broadcast module, also for when the judged result of described judge module is not for existing, to each adjacent signaling node broadcast state notification message of described signaling node, described routing state notification message indicates the route between described signaling node and at least one destination node described unreachable.
9. signaling node as claimed in claim 8, is characterized in that,
Described detection module, also for detecting described connection of breaking down;
Described logging modle, during fault recovery also for the connection of breaking down described in detecting when described detection module, the routing state respectively comprising the route of the connection of described fault recovery described memory module stored is recorded as and can reaches;
Described judge module, also for when described signaling node is transit node, judges whether the route respectively comprising the connection of described fault recovery that described memory module stores exists replacement route respectively;
Described broadcast module, also for when the judged result of described judge module is not for existing, to each adjacent signaling node broadcast state notification message of described signaling node, described routing state notification message indicates the route between described signaling node and the described destination node that there is not the route of replacing route to reach.
10. signaling node as claimed in claim 8, is characterized in that,
Described memory module, when also can reach for the route between the routing state notification message described adjacent signaling node of instruction received by described receiver module and at least one destination node, inquire about the route self whether storing and arrived at least one destination node described by described adjacent signaling node;
Described logging modle, also for when the Query Result of described memory module is for being, what described memory module stored is respectively recorded as can be reached by the routing state of the route of described adjacent signaling node arrival at least one destination node described;
Described judge module, also for when described signaling node is transit node, whether the route respectively arriving at least one destination node described by described adjacent signaling node judging that described memory module stores respectively exists replacement route;
Described broadcast module, also for when the judged result of described judge module is not for existing, to each adjacent signaling node broadcast state notification message of described signaling node, described routing state notification message indicates the route between described signaling node and at least one destination node described to reach.
11. as the signaling node in claim 8 to 10 as described in any one, it is characterized in that, when described judge module judges that the destination node do not existed corresponding to the route of replacing route that described memory module stores is multiple, described broadcast module, specifically for:
Each adjacent signaling node respectively to described signaling node broadcasts many routing state notification messages, carries the information of each described multiple destination node in each described routing state notification message respectively; Or,
To each adjacent signaling node broadcast state notification message of described signaling node, in described routing state notification message, carry the information of whole described multiple destination node.
12. signaling nodes as claimed in claim 8, it is characterized in that, described receiver module, also for receiving signaling message to be forwarded, described signaling node, also comprises:
Forwarding module, for when described receiver module receives signaling message to be forwarded, inquire about the routing state of each route corresponding with the destination node of described signaling message to be forwarded that described memory module stores, and be that the route that can reach forwards described signaling message to be forwarded to described destination node by routing state.
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| CN106487682A (en) * | 2015-08-27 | 2017-03-08 | 中国移动通信集团公司 | A kind of Diameter signaling network route method and device |
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| CN103685035B (en) * | 2012-09-26 | 2018-04-27 | 深圳市腾讯计算机系统有限公司 | Route renewing method, interchanger and system |
| CN113497794B (en) * | 2020-04-03 | 2023-04-18 | 华为技术有限公司 | Method and device for switching route |
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| CN101207616A (en) * | 2006-12-21 | 2008-06-25 | 中兴通讯股份有限公司 | Method for extending IP signaling system M3UA route supervising function |
| CN101383840A (en) * | 2007-09-05 | 2009-03-11 | 华为技术有限公司 | Network, device and message transmitting method based on M3UA protocol networking |
| CN101771773A (en) * | 2008-12-26 | 2010-07-07 | 中兴通讯股份有限公司 | Maintaining method and system of M3UA signaling route |
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| CN101207616A (en) * | 2006-12-21 | 2008-06-25 | 中兴通讯股份有限公司 | Method for extending IP signaling system M3UA route supervising function |
| CN101383840A (en) * | 2007-09-05 | 2009-03-11 | 华为技术有限公司 | Network, device and message transmitting method based on M3UA protocol networking |
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