CN105429812A - Node state detection method and device - Google Patents
Node state detection method and device Download PDFInfo
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- CN105429812A CN105429812A CN201410466787.0A CN201410466787A CN105429812A CN 105429812 A CN105429812 A CN 105429812A CN 201410466787 A CN201410466787 A CN 201410466787A CN 105429812 A CN105429812 A CN 105429812A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
Abstract
The invention provides a node state detection method and device. The method comprises the steps of sending a state detection request message to a client, and determining that the node state of the client is available when a state detection response message sent as feedback by the client is received according to the state detection request message. The problem in the prior art that the state of an end node cannot be accurately obtained is solved. The node state detection method and device can accurately detect the state of an end node.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of node state detection method and device.
Background technology
Third generation partner program (3rdGenerationPartnershipProject, referred to as 3GPP) to the project of mobile wireless network of future generation System Architecture Evolution (SystemArchitectureEvolution, referred to as SAE).The framework of SAE, Fig. 1 is the schematic diagram of SAE framework in correlation technique, as shown in Figure 1, wherein contains following network element:
The wireless access network (EvolvedWirelessAccessNetwork, referred to as E-RAN) of evolution, can provide higher up-downgoing speed, lower transmission delay and more reliably wireless transmission.The network element comprised in E-RAN is eNodeB (EvolvedNodeB), for the access of terminal provides Radio Resource.
Home subscriber server (HomeSubscriberServer, referred to as HSS), for permanent storage user contracting data.
Mobile management entity (MobilityManagementEntity, referred to as MME), it is chain of command functional entity, the server of interim storage user data, be in charge of and store UE context (such as UE/ user ID, mobility management states, user security parameters etc.), for user distributes temporary mark, be responsible for carrying out authentication to this user when UE quarters at this tracing area or this network; All non-access layer informations between process MME and UE; Trigger the paging at SAE.
Gateway (ServingGateway, referred to as S-GW), this gateway is a user entity, is responsible for user face data route processing, and termination is in the downlink data of the UE of idle condition.The SAE of management and storage UE carries (bearer) context, such as IP bearer service parameter and network internal routing iinformation etc.Be the anchor point in 3GPP internal system user face, a user can only have a S-GW a moment;
Packet data network gateway (PacketDataNetworkGateway, referred to as PDNGW), be responsible for the gateway that UE accesses PDN, distributing user IP address is the mobility anchor point of 3GPP and non-3 GPP access system simultaneously.User can access multiple PDNGW at synchronization.
Strategy and conjunction charging regulation function entity (PolicyandChargingRuleFunctionality, referred to as PCRF), this functional entity mainly produces according to the configuration information of business information and user signing contract information and operator service quality (QualityofService, referred to as the QoS) rule and charging regulation that control user data delivery.This functional entity also can control the foundation that carries in Access Network and release.
In SAE framework, Fig. 2 is the schematic diagram communicated between MME and HSS in correlation technique, and as shown in Figure 2, the communication of MME and HSS network element is based on Diameter, and MME can be used as Diameter client, and HSS network element can be used as Diameter service end.When MME and HSS has directly transmission connection, by the monitoring of tools request message (DeviceWatchdogRequest between two peers include both, referred to as DWR) and monitoring of tools response message (DeviceWatchdogAnswer, referred to as DWA) detect correspondent network node availability.But DWR/DWA can only have between peers include both that directly transmission connects at two and transmit, between MME and HSS, directly do not transmit connection, during by the communication of Diameter agent node, MME or HSS cannot the node availability of direct perception the other side.The machine if such as MME network element is delayed, but during Diameter agent node normal operation, HSS still thinks that MME network element node is effective.
3GPP pays special attention to based on IP Multimedia System (IPMultimediaSubsystem at present, referred to as IMS) speech business VoLTE Disaster Tolerant Scheme, such as under P-CSCF delays machine situation, HSS needs Proxy Call Session Control Function (Proxy-CallSessionControlFunction by S6a interface notification, referred to as P-CSCF) machine of delaying informs to MME, notifies that UE selects a new P-CSCF to register by MME.And if HSS cannot the node availability of perception MME, send message toward MME by all means, UE can be caused cannot to reselect P-CSCF, cannot IMS speech business be carried out.
Cannot direct perception peer node validity problem for solve between Diameter client and service end, domestic existing similar patent is disposed, but the method for description is different from the present invention.Be the state of the peers include both node be adjacent by the perception of Diameter agent node in prior art, and inform other peers include both.The drawback of this method is that Diameter agent node does not know the state of other peers include both the need of certain peers include both of perception, broadcast announcement of can only making no exception; And if having passed through multiple Diameter agent node between client and service end, so notify that quantity can become progression to increase.
In addition, 3GPP agreement requires HSS after restarting at present, needs to send reset message to MME, and it is unreliable that MME marks the user data that in this network element, this HSS is relevant, and MME needs to perform the associative operation after HSS is restarted.If the transmission path between HSS and MME is abnormal, such as certain agent node breaks down, and MME can be caused cannot to receive the reset message of HSS.
For can not the problem of state of Obtaining Accurate end node in correlation technique, at present effective solution be not yet proposed.
Summary of the invention
The invention provides a kind of node state detection method and device, can not the problem of state of Obtaining Accurate end node at least to solve in correlation technique.
According to an aspect of the present invention, provide a kind of node state detection method, comprising: send state-detection request message to client; When receiving the state-detection response message that described client is fed back according to described state-detection request message, determine that the node state of described client is available.
Preferably, send described state-detection request message to described client and comprise: the mode forwarded by one or more agent node, send described state-detection request message to described client.
Preferably, determine that the node state of described client is available comprising: carry in described state-detection response message described client restart number of times, restart number of times judge whether described client is the upstate of restarting according to described.
Preferably, also comprise after sending described state-detection request message to described client: judge whether to receive the state-detection response message that described client is fed back according to described state-detection request message.
According to a further aspect in the invention, provide a kind of node state detection method, comprising: send state-detection request message to service end; When receiving the state-detection response message that described service end is fed back according to described state-detection request message, determine that the node state of described service end is available.
Preferably, send described state-detection request message to described service end and comprise: the mode forwarded by one or more agent node, send described state-detection request message to described service end.
Preferably, determine that the node state of described service end is available comprising: carry in described state-detection response message described service end restart number of times, restart number of times judge whether described service end is the upstate of restarting according to described.
Preferably, after sending described state-detection request message to described service end, also comprise: judge whether to receive the state-detection response message that described service end is fed back according to described state-detection request message.
According to a further aspect in the invention, provide a kind of node state checkout gear, comprising: the first sending module, for sending state-detection request message to client; First determination module, for when receiving the state-detection response message that described client is fed back according to described state-detection request message, determines that the node state of described client is available.
Preferably, described first sending module comprises: the first transmitting element, for the mode forwarded by one or more agent node, sends described state-detection request message to described client.
Preferably, described first determination module comprises: the first judging unit, for carry in described state-detection response message described client restart number of times, restart number of times judge whether described client is the upstate of restarting according to described.
Preferably, described device also comprises: the first judge module, for judging whether to receive the state-detection response message that described client is fed back according to described state-detection request message.
According to a further aspect in the invention, provide a kind of node state checkout gear, comprising: the second sending module, for sending state-detection request message to service end; Second determination module, for when receiving the state-detection response message that described service end is fed back according to described state-detection request message, determines that the node state of described service end is available.
Preferably, described second sending module comprises: the second transmitting element, for the mode forwarded by one or more agent node, sends described state-detection request message to described service end.
Preferably, described second determination module comprises: the second judging unit, for carry in described state-detection response message described service end restart number of times, restart number of times judge whether described service end is the upstate of restarting according to described.
Preferably, described device also comprises: the second judge module, for judging whether to receive the state-detection response message that described service end is fed back according to described state-detection request message.
By the present invention, adopt and send state-detection request message to client; When receiving the state-detection response message that described client is fed back according to described state-detection request message, determine that the node state of described client is available, solving in correlation technique can not the problem of state of Obtaining Accurate end node, accurately can detect the state of end node.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of SAE framework in correlation technique;
Fig. 2 is the schematic diagram communicated between MME and HSS in correlation technique;
Fig. 3 is the flow chart one according to the detection method of the embodiment of the present invention;
Fig. 4 is the flowchart 2 of the detection method according to the embodiment of the present invention;
Fig. 5 is the block diagram one according to the checkout gear of the embodiment of the present invention;
Fig. 6 is the block diagram one of checkout gear according to the preferred embodiment of the invention;
Fig. 7 is the block diagram two of checkout gear according to the preferred embodiment of the invention;
Fig. 8 is the block diagram two according to the checkout gear of the embodiment of the present invention;
Fig. 9 is the block diagram three of checkout gear according to the preferred embodiment of the invention;
Figure 10 is the block diagram four of checkout gear according to the preferred embodiment of the invention;
Figure 11 is the flow chart one of detection method according to the preferred embodiment of the invention;
Figure 12 is the flowchart 2 of detection method according to the preferred embodiment of the invention;
Figure 13 is the flow chart 3 of detection method according to the preferred embodiment of the invention;
Figure 14 is the flow chart four of detection method according to the preferred embodiment of the invention.
Embodiment
Hereinafter also describe the present invention in detail with reference to accompanying drawing in conjunction with the embodiments.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
Provide a kind of detection method in the present embodiment, Fig. 3 is the flow chart one according to the detection method of the embodiment of the present invention, and as shown in Figure 3, this flow process comprises the steps:
Step S302, sends state-detection request message to client;
Step S304, when receiving the state-detection response message that this client is fed back according to this state-detection request message, determines that the node state of this client is available.
Pass through above-mentioned steps, state-detection request message is sent to client, when receiving the state-detection response message that this client is fed back according to this state-detection request message, determine that the node state of this client is available, solving in correlation technique can not the problem of state of Obtaining Accurate end node, accurately can detect the state of end node.
As preferred embodiment, Diameter is when by one or more Diameter agent node communication, by the mode that one or more agent node forwards, send this state-detection request message to this client, the validity of Diameter client node can be directly detected.
As preferred embodiment, carry in state-detection response message this client restart number of times, restart number of times judge whether this client is the upstate of restarting according to this, namely perception whether can occur to restart to client, guaranteed the correct associative operation after client node is restarted that performs.
Preferably, also comprising after sending state-detection request message to client: judge whether to receive the state-detection response message that this client feed back according to this state-detection request message, whether the state according to the result determination user endpoints of judgement is available.
The another aspect of the embodiment of the present invention provides a kind of node state detection method, and Fig. 4 is the flowchart 2 of the node state detection method according to the embodiment of the present invention, and as shown in Figure 4, this flow process comprises the steps:
Step S402, sends state-detection request message to service end;
Step S404, when receiving the state-detection response message that this service end is fed back according to this state-detection request message, determines that the node state of this service end is available.
Pass through above-mentioned steps, state-detection request message is sent to service end, when receiving the state-detection response message that this service end is fed back according to this state-detection request message, determine that the node state of this service end is available, solving in correlation technique can not the problem of state of Obtaining Accurate end node, accurately can detect the state of end node.
As preferred embodiment, Diameter is when by one or more Diameter agent node communication, by the mode that one or more agent node forwards, send this state-detection request message to this service end, the validity of Diameter service end node can be directly detected.
As preferred embodiment, determine that the node state of this service end is available comprising: carry in this state-detection response message this service end restart number of times, restart number of times judge whether this service end is the upstate of restarting according to this, namely perception whether can occur to restart to service end, guaranteed the correct associative operation after service end node is restarted that performs.
Preferably, after sending state-detection request message to service end, judge whether to receive the state-detection response message that this service end feed back according to this state-detection request message, whether the state according to the result determination service end node of judgement is available.
According to a further aspect in the invention, provide a kind of node state checkout gear, this device is used for realizing above-described embodiment and preferred implementation, has carried out repeating no more of explanation.As used below, term " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
Fig. 5 is the block diagram one of the node state checkout gear according to the embodiment of the present invention, as shown in Figure 5, comprising: the first sending module 52, first determination module 54, carries out brief description below to modules.
First sending module 52, for sending state-detection request message to client;
First determination module 54, for when receiving the state-detection response message that this client is fed back according to this state-detection request message, determines that the node state of this client is available.
Fig. 6 is the block diagram one of checkout gear according to the preferred embodiment of the invention, and as shown in Figure 6, the first sending module 52 comprises:
First transmitting element 62, for the mode forwarded by one or more agent node, sends this state-detection request message to this client.
Fig. 7 is the block diagram two of checkout gear according to the preferred embodiment of the invention, and as shown in Figure 7, the first determination module 54 comprises:
First judging unit 72, for carry in this state-detection response message this client restart number of times, restart number of times judge whether this client is the upstate of restarting according to this.
Preferably, described device also comprises: the first judge module, for judging whether to receive the state-detection response message that client is fed back according to state-detection request message.
The another aspect of the embodiment of the present invention, additionally provide a kind of node state checkout gear, Fig. 8 is the block diagram two of the node state checkout gear according to the embodiment of the present invention, as shown in Figure 8, comprise: the second sending module 82, second determination module 84, brief description is carried out to modules below.
Second sending module 82, for sending state-detection request message to service end;
Second determination module 84, for when receiving the state-detection response message that this service end is fed back according to this state-detection request message, determines that the node state of this service end is available.
Fig. 9 is the block diagram three of checkout gear according to the preferred embodiment of the invention, and as shown in Figure 9, the second sending module 82 comprises:
Second transmitting element 92, for the mode forwarded by one or more agent node, sends this state-detection request message to this service end.
Figure 10 is the block diagram four of node state checkout gear according to the preferred embodiment of the invention, and as shown in Figure 10, the second determination module 84 comprises:
Second judging unit 102, for carry in this state-detection response message this service end restart number of times, restart number of times judge whether this service end is the upstate of restarting according to this.
Preferably, described device also comprises: the second judge module, for judging whether to receive the state-detection response message that service end is fed back according to state-detection request message.
Below in conjunction with preferred embodiment, the embodiment of the present invention is described.
Embodiments provide a kind of node state detection method, make Diameter client/service end when by one or more Diameter agent node communication, Diameter service end/client node validity can be directly detected, and can whether occur to restart in perception opposite end.Be applicable to Diameter client be directly connected with Diameter service end, or act on behalf of by one/multiple Diameter the scene connected.Mainly comprise: Diameter client/service end is to Diameter service end/client timed sending state-detection request message.Diameter service end/client receives state-detection message, detects response message to Diameter client/service end return state.Optionally, what state-detection response message can comprise Diameter service end/client restarts number of times.Diameter client/service end receives state-detection response message, judges that Diameter service end/client node is effective.Optionally, Diameter client/service end judge in state-detection response message restart number of times from preserve before different, can think that Diameter service end/client occurred to restart during this period, Diameter client/service end performs the relevant treatment that opposite end is restarted.
Figure 11 is the flow chart one of detection method according to the preferred embodiment of the invention, and as shown in figure 11, client and service end, by an agent node communication, send state-detection request message by client to service end, specifically comprise the following steps:
Step S1102, client and service end complete session establishment;
Step S1104, client, after the T1 time, is initiated state-detection request message to service end, is comprised source node client host name and destination node service end host name in message;
Step S1106, state-detection request message, according to the destination node host name comprised in message, is routed to service end by agent node;
Step S1108, after service end receives state-detection request message, detect response message to client return state, the destination node host name in message is set to the source node host name in request message; Optionally, service end comprises this network element and restarts number of times in state-detection response message;
Step S1110, state-detection response message, according to the destination node host name comprised in message, is routed to client by agent node;
Step S1112, after client receives state-detection response message, judges that this message is the response of state-detection request that local terminal sends, then the decision state solicitation message service end node of specifying is effective.Optionally, to restart number of times different for restart number of times and this service end of preserving before this node that client judges in state-detection response message, then judge that this service end occurred to restart, the relevant action that client executing service end is restarted.
Step S1114 ~ step S1122, client again initiates state-detection request message after the T1 time, processes same step S1104 ~ step S1112.
Figure 12 is the flowchart 2 of node state detection method according to the preferred embodiment of the invention, and as shown in figure 12, service end and client, by an agent node communication, send state-detection request message by service end to client, specifically comprise the following steps:
Step S1202, client and service end complete session establishment;
Step S1204, service end, after the T1 time, is initiated state-detection request message to client, is comprised the host name of source node service end host name and destination node client in message;
Step S1206, state-detection request message, according to the destination node host name comprised in message, is routed to client by agent node;
Step S1208, after client receives state-detection request message, detect response message to service end return state, the destination node host name in message is set to the source node host name in request message; Optionally, client comprises this network element and restarts number of times in state-detection response message;
Step S1210, state-detection response message, according to the destination node host name comprised in message, is routed to client by agent node;
Step S1212, after service end receives state-detection response message, judges that this message is the response of state-detection request that local terminal sends, then the decision state solicitation message client node of specifying is effective.Optionally, to restart number of times different for restart number of times and this client of preserving before this node that service end judges in state-detection response message, then judge that this client occurred to restart, service end performs the relevant action that client is restarted.
Step S1214 ~ step S1222, service end again initiates state-detection request message after the T1 time, processes same step S1204 ~ step S1212.
Figure 13 is the flow chart 3 of node state detection method according to the preferred embodiment of the invention, and as shown in figure 13, client sends state-detection request message to service end, when service end is without response, comprises the following steps:
Step S1302, client and service end complete session establishment;
Step S1304, client is after the T1 time, and initiate state-detection request message to service end, comprise source node client host name and destination node service end host name in message, client does not receive state-detection response message;
Step S1306, client is after the T1 time, and again initiate state-detection request message to service end, comprise source node client host name and destination node service end host name in message, client does not still receive state-detection response message;
Step S1308, client, according to this collocation strategy, does not receive state-detection response message yet after sending several times state-detection request message, then judges that this service end node is invalid;
Step S1310, service end is recovered;
Step S1312, client, after the T1 time, is again initiated state-detection request message to service end, is comprised source node client host name and destination node service end host name in message;
Step S1314, after service end receives state-detection request message, detect response message to client return state, the destination node host name in message is set to the source node host name in request message;
Step S1316, after client receives state-detection response message, judges that this message is the response message of state-detection request that local terminal sends, then the decision state solicitation message service end node of specifying is effective.
Figure 14 is the flow chart four of node state detection method according to the preferred embodiment of the invention, and as shown in figure 14, client sends state-detection request message to service end, and service end restarts number of times when changing, and comprises the following steps:
Step S1402, client and service end complete session establishment;
Step S1404, client, after the T1 time, is initiated state-detection request message to service end, is comprised source node client host name and destination node service end host name in message;
Step S1406, after service end receives state-detection request message, detect response message to client return state, the destination node host name in message is set to the source node host name in request message, and comprises local terminal and restart number of times=N;
Step S1408, after client receives state-detection response message, judges that this message is the response message of state-detection request that local terminal sends, then the decision state solicitation message service end node of specifying is effective, and service end is restarted times N is saved in this locality;
Step S1410, service end restarts rear recovery, and local terminal is restarted and become N+1;
Step S1412, client, after the T1 time, is again initiated state-detection request message to service end, is comprised source node host name and destination node client host name in message;
Step S1414, after service end receives state-detection request message, detect response message to client return state, the destination node host name in message is set to the source node host name in request message, and comprises local terminal and restart number of times=N+1;
Step S1416, after client receives state-detection response message, judges that this message is the response of state-detection request that local terminal sends, then the decision state solicitation message service end node of specifying is effective;
Step S1418, client judges to restart number of times and local this service end node preserved by the service end node comprised in state-detection response message, and to restart number of times unequal, judge that this service end node occurred to restart, perform the relevant action relevant to this service end node.
By above-mentioned steps, make Diameter client and Diameter service end when by one or more Diameter agent node communication, Diameter client/service end can the validity of direct aware services end/client node.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (16)
1. a node state detection method, is characterized in that, comprising:
State-detection request message is sent to client;
When receiving the state-detection response message that described client is fed back according to described state-detection request message, determine that the node state of described client is available.
2. method according to claim 1, is characterized in that, sends described state-detection request message comprise to described client:
By the mode that one or more agent node forwards, send described state-detection request message to described client.
3. method according to claim 1, is characterized in that, determines that the node state of described client is available comprising:
Carry in described state-detection response message described client restart number of times, restart number of times judge whether described client is the upstate of restarting according to described.
4. method according to claim 1, is characterized in that, also comprises after sending described state-detection request message to described client:
Judge whether to receive the state-detection response message that described client is fed back according to described state-detection request message.
5. a node state detection method, is characterized in that, comprising:
State-detection request message is sent to service end;
When receiving the state-detection response message that described service end is fed back according to described state-detection request message, determine that the node state of described service end is available.
6. method according to claim 5, is characterized in that, sends described state-detection request message comprise to described service end:
By the mode that one or more agent node forwards, send described state-detection request message to described service end.
7. method according to claim 5, is characterized in that, determines that the node state of described service end is available comprising:
Carry in described state-detection response message described service end restart number of times, restart number of times judge whether described service end is the upstate of restarting according to described.
8. method according to claim 5, is characterized in that, after sending described state-detection request message to described service end, also comprises:
Judge whether to receive the state-detection response message that described service end is fed back according to described state-detection request message.
9. a node state checkout gear, is characterized in that, comprising:
First sending module, for sending state-detection request message to client;
First determination module, for when receiving the state-detection response message that described client is fed back according to described state-detection request message, determines that the node state of described client is available.
10. device according to claim 9, is characterized in that, described first sending module comprises:
First transmitting element, for the mode forwarded by one or more agent node, sends described state-detection request message to described client.
11. devices according to claim 9, is characterized in that, described first determination module comprises:
First judging unit, for carry in described state-detection response message described client restart number of times, restart number of times judge whether described client is the upstate of restarting according to described.
12. devices according to claim 9, is characterized in that, described device also comprises:
First judge module, for judging whether to receive the state-detection response message that described client is fed back according to described state-detection request message.
13. 1 kinds of node state checkout gears, is characterized in that, comprising:
Second sending module, for sending state-detection request message to service end;
Second determination module, for when receiving the state-detection response message that described service end is fed back according to described state-detection request message, determines that the node state of described service end is available.
14. devices according to claim 13, is characterized in that, described second sending module comprises:
Second transmitting element, for the mode forwarded by one or more agent node, sends described state-detection request message to described service end.
15. devices according to claim 13, is characterized in that, described second determination module comprises:
Second judging unit, for carry in described state-detection response message described service end restart number of times, restart number of times judge whether described service end is the upstate of restarting according to described.
16. devices according to claim 13, is characterized in that, described device also comprises:
Second judge module, for judging whether to receive the state-detection response message that described service end is fed back according to described state-detection request message.
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| CN201410466787.0A CN105429812A (en) | 2014-09-12 | 2014-09-12 | Node state detection method and device |
| PCT/CN2015/072128 WO2015154580A1 (en) | 2014-09-12 | 2015-02-03 | Node state detection method and device |
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| CN201410466787.0A CN105429812A (en) | 2014-09-12 | 2014-09-12 | Node state detection method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015154580A1 (en) | 2015-10-15 |
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