CN103685166A - Method and device for switching between main server and standby server for session initiation protocol terminal - Google Patents
Method and device for switching between main server and standby server for session initiation protocol terminal Download PDFInfo
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Abstract
The invention discloses a method and device for switching between a main server and a standby server for an SIP (session initiation protocol) terminal. The method comprises the following steps: when the SIP terminal is registered successfully to the main server, invitation information is sent to the main server and feedback from the main server is waited; when wrong gateway information fed back by the main server is received within scheduled time or any response information fed back by the main server is still not received through transmitting the invitation information more than once, the main server is switched to the standby server. According to the invention, after INVITE information is sent through SIP calling, whether the switching can be conducted between the main server and the standby server is judged according to calling state, and problems such as insensitivity of detecting server, heartbeat or relatively poor intercommunity of notifying messages and relatively high requirement on network in conventional SIP signaling are solved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to method and device that a kind of initial session protocol terminal is switched active/standby server.
Background technology
SIP(Session Initiated Protocol, initial session protocol) terminal is switched in the situation that active/standby server is certain sip server node failure and can also be continued to provide service.Angle from networking, need sip terminal can belong to the management of two or more sip servers, these sip servers adopt active/standby working mechanism, and under normal circumstances, sip terminal is only subject to the control of master server, once master server breaks down, sip terminal just according to pre-configured address information to standby server registration, standby server is taken over master server and is controlled, thereby guarantees that system works do not interrupt, this kind of working method is active and standby switching, claims again disaster tolerance or dual-homed.
In the active and standby handoff technique of existing sip server, there are following problems:
Modal switching mode is that sip terminal is used registration to refresh detection server state, but SIP term of validity is generally grown (0.5 hour ~ 1 hour), if current server breaks down, the state of aware services device can affect audio call within the refresh cycle in time.
Another kind of common mode is to adopt heartbeat mechanism to detect server state, and this mode needs sip terminal and server all to support same heartbeat message, and heartbeat is timed sending, take certain network traffics.
Also having a kind of mode is to be switched by sip server notice sip terminal, this mode needs sip server and sip terminal all to support specific notification message (there is no at present standard), versatility a little less than, and be (such as the power-off suspension) that can not initiate a message during server failure under many circumstances, so which is not very reliable.
Summary of the invention
In view of above-mentioned analysis, the present invention aims to provide method and the device that a kind of initial session protocol terminal is switched active/standby server, in order to solve, in existing SIP signaling, detect that server is insensitive, heartbeat or notification message interoperability is poor, to problems such as network requirement are higher.
Object of the present invention is mainly achieved through the following technical solutions:
The invention provides a kind of method that initial session protocol sip terminal switches active/standby server, comprising:
When sip terminal is successfully registered to after master server, to master server, send invitation message and wait for the feedback of master server;
Within the scheduled time, receive the wrong gateway messages of master server feedback, or through repeatedly retransmitting invitation message, still do not receive any response message of master server feedback, be switched to standby server.
Further, preset time-out time and the re-transmission time of invitation message, while not receiving any response message of master server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of master server, until receive response message or the predetermined time-out time of master server, finish; If still do not receive any response message of master server feedback when predetermined time-out time finishes, be switched to standby server.
Further, preset number of retransmissions and the re-transmission time of invitation message, while not receiving any response message of master server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of master server, until receive response message or the predetermined number of retransmissions of master server, finish; If still do not receive any response message of master server feedback when predetermined number of retransmissions finishes, be switched to standby server.
Wherein, the described predetermined re-transmission time is the time series increasing progressively.
Further, also comprise:
Sip terminal is switched to after standby server registration success, to standby server, sends invitation message;
Within the scheduled time, receive the wrong gateway messages of standby server feedback, or when repeatedly retransmitting invitation message and still do not receive any response message of standby server feedback, be switched to master server.
Further, preset time-out time and the re-transmission time of invitation message, while not receiving any response message of standby server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback for server, until receive response message or the predetermined time-out time of standby server, finishing; If still do not receive any response message of standby server feedback when predetermined time-out time finishes, be switched to master server.
Further, preset number of retransmissions and the re-transmission time of invitation message, while not receiving any response message of standby server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback for server, until receive response message or the predetermined number of retransmissions of standby server, finishing; If still do not receive any response message of standby server feedback when predetermined number of retransmissions finishes, be switched to master server.
The present invention also provides a kind of initial session protocol sip terminal to switch the device of active/standby server, comprising:
Sending module, for being successfully registered at sip terminal after master server or standby server, sending invitation message and waits for master server or the feedback of standby server to master server or standby server;
Judging treatmenting module, for receiving in the given time the wrong gateway messages of master server or standby server feedback, or while still not receiving any response message of master server or standby server feedback through repeatedly retransmitting invitation message, be switched to standby server or master server.
Further, preset time-out time and the re-transmission time of invitation message, described judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again trigger described sending module and send invitation message and wait for master server or the feedback of standby server, until receive response message or the predetermined time-out time of master server or standby server, finish; If still do not receive any response message of master server or standby server feedback when predetermined time-out time finishes, be switched to standby server or master server.
Further, preset number of retransmissions and the re-transmission time of invitation message, described judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again send invitation message and wait for master server or the feedback of standby server, until receive response message or the predetermined number of retransmissions of master server or standby server, finish; If still do not receive any response message of master server or standby server feedback when predetermined number of retransmissions finishes, be switched to standby server or master server.
Beneficial effect of the present invention is as follows:
The present invention is called out and is sent after INVITE by sip terminal, according to call state, judge whether server carries out active and standby switching, overcome in existing SIP signaling, detect that server is insensitive, heartbeat or notification message interoperability is poor, to the problem such as network requirement is higher.
Other features and advantages of the present invention will be set forth in the following description, and, the becoming apparent from specification of part, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in the specification write, claims and accompanying drawing.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for the invention embodiment;
Fig. 2 is in the inventive method embodiment, and sip terminal is switched to a kind of schematic flow sheet of standby server from master server;
Fig. 3 is in the inventive method embodiment, and sip terminal is switched to the another kind of schematic flow sheet of standby server from master server;
Fig. 4 is in the inventive method embodiment, a kind of schematic flow sheet of sip terminal from standby Server switching to master server;
Fig. 5 is in the inventive method embodiment, the another kind of schematic flow sheet of sip terminal from standby Server switching to master server;
Fig. 6 is the structural representation of device embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specifically describe the preferred embodiments of the present invention, wherein, accompanying drawing forms the application's part, and together with embodiments of the present invention for explaining principle of the present invention.
First by reference to the accompanying drawings 1 to 5 couple of the inventive method embodiment is elaborated.
As shown in Figure 1, Fig. 1 is the schematic flow sheet of the present invention's the first embodiment of the method, specifically can comprise:
Step 101: when sip terminal is successfully registered to after master server, send invitation message and wait for the feedback of master server to master server;
Step 102: receive the wrong gateway messages of master server feedback within the scheduled time, or still do not receive any response message of master server feedback through repeatedly retransmitting invitation message, be switched to standby server;
Step 103: when sip terminal is switched to after standby server registration success, send invitation message to standby server;
Step 104: receive the wrong gateway messages of standby server feedback within the scheduled time, or when repeatedly retransmitting invitation message and still do not receive any response message of standby server feedback, be switched to master server.
To respectively the inventive method embodiment be illustrated below.
As shown in Figure 2, Fig. 2 is in the inventive method embodiment, and sip terminal is switched to a kind of schematic flow sheet of standby server from master server, specifically can comprise:
Step 201:SIP endpoint registration, after master server success, starts dialing, and the backward master server that dialled sends INVITE(and invites) message, and start overtime timer and retransmission timer, wait for the feedback of master server; If now master server power-off or suspension, will not feed back any response message;
Any response message that does not receive master server feedback in sip terminal is after retransmission timer is overtime, again sends INVITE to master server, and starts retransmission timer; If when sip terminal does not still receive any response message of master server feedback after retransmission timer is overtime, again send INVITE, until it is overtime to receive response message or the overtime timer of master server, stop sending INVITE; If still do not receive any response message of master server feedback when overtime timer stops, execution step 202;
Step 202: be switched to standby server and register;
Step 203: standby server is replied 200OK message, agrees this sip terminal registration.
It should be noted that, the object that setting overtime timer and retransmission timer also repeatedly send INVITE is in order to guarantee reliability, determines it is that power-off or suspension etc. have occurred master server.In order to realize this purpose, except 101 the mode of taking steps, can also take another kind of mode to realize, preset retransmission counter and the retransmission timer of invitation message, while not receiving any response message of master server feedback after retransmission timer is overtime, again send INVITE and wait for the feedback of master server, until receive response message or the retransmission counter of master server, stop counting; If still do not receive any response message of master server feedback when retransmission counter stops counting, be switched to standby server.
In addition, the duration of overtime timer can be set as required, for example 32 seconds; The duration of retransmission timer can be the time series increasing progressively, for example, 0.5 second, 1 second, 2 seconds ...., the number of times of retransmission counter also can be set as required, for example 7 ~ 11 times.
As shown in Figure 3, Fig. 3 is in the inventive method embodiment, and sip terminal is switched to the another kind of schematic flow sheet of standby server from master server, specifically can comprise:
Step 301: after sip terminal is registered to master server success, start dialing, the sip terminal backward master server that dialled sends INVITE; Now, master server network is normal, but can not normal process call out because of fault;
Step 302: master server feedback 502Bad Gateway message is to sip terminal; Wherein, 502Bad Gateway message is gateway error message, when server is during as gateway or proxy server, need to be linked into certain descending server and complete request, this descending server sends this response and represents that it is for invalid gateway, so server can be realized the object that allows registration terminal be switched to another server by 502Bad Gateway message;
Step 303: when sip terminal still receives the 502Bad Gateway message of master server feedback in the given time, be switched to standby server and register;
Step 304: standby server is replied 200OK message, agrees this sip terminal registration.
As shown in Figure 4, Fig. 4 is in the inventive method embodiment, and a kind of schematic flow sheet of sip terminal from standby Server switching to master server, specifically can comprise:
Step 401:SIP endpoint registration, after standby server success, starts dialing, and the backward standby server that dialled sends INVITE(and invites) message, and start overtime timer and retransmission timer, wait for the feedback of standby server; If now standby server power-off or suspension, will not feed back any response message;
In sip terminal is after retransmission timer is overtime, do not receive any response message of standby server feedback, again send INVITE to standby server, and start retransmission timer; If when sip terminal does not still receive any response message of standby server feedback after retransmission timer is overtime, again send INVITE, until it is overtime to receive response message or the overtime timer of standby server, stop sending INVITE; If still do not receive any response message of standby server feedback when overtime timer stops, execution step 402;
Step 402: be switched to master server and register;
Step 403: master server is replied 200OK message, agrees this sip terminal registration.
It should be noted that, the object that setting overtime timer and retransmission timer also repeatedly send INVITE is in order to guarantee reliability, determines it is that power-off or suspension etc. have occurred standby server.In order to realize this purpose, except 101 the mode of taking steps, can also take another kind of mode to realize, preset retransmission counter and the retransmission timer of invitation message, while not receiving any response message of standby server feedback after retransmission timer is overtime, again send INVITE and wait for the feedback for server, until receive response message or the retransmission counter of standby server, stopping counting; If still do not receive any response message of standby server feedback when retransmission counter stops counting, be switched to master server.
As shown in Figure 5, Fig. 5 is in the inventive method embodiment, and the another kind of schematic flow sheet of sip terminal from standby Server switching to master server, specifically can comprise:
Step 501:SIP endpoint registration, after standby server success, starts dialing, and sip terminal dial and backwardly for server, sent INVITE; Now, standby server network is normal, but can not normal process call out because of fault;
Step 502: standby server feedback 502Bad Gateway message is to sip terminal;
Step 503: when sip terminal still receives the 502Bad Gateway message of standby server feedback in the given time, be switched to standby server and register;
Step 504: standby server is replied 200OK message, agrees this sip terminal registration.
Next device is elaborated described in 6 pairs of embodiment of the present invention by reference to the accompanying drawings.
As shown in Figure 6, Fig. 6 is the structural representation installing described in the embodiment of the present invention, specifically can comprise:
Sending module, is responsible for being successfully registered to after master server or standby server at sip terminal, to master server or standby server, sends invitation message and waits for master server or the feedback of standby server;
Judging treatmenting module, be responsible for receiving in the given time the wrong gateway messages of master server or standby server feedback, or while still not receiving any response message of master server or standby server feedback through repeatedly retransmitting invitation message, be switched to standby server or master server.
If preset time-out time and the re-transmission time of invitation message, judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again trigger described sending module and send invitation message and wait for master server or the feedback of standby server, until receive response message or the predetermined time-out time of master server or standby server, finish; If still do not receive any response message of master server or standby server feedback when predetermined time-out time finishes, be switched to standby server or master server.
If preset number of retransmissions and the re-transmission time of invitation message, judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again send invitation message and wait for master server or the feedback of standby server, until receive response message or the predetermined number of retransmissions of master server or standby server, finish; If still do not receive any response message of master server or standby server feedback when predetermined number of retransmissions finishes, be switched to standby server or master server.
In sum, the embodiment of the present invention provides a kind of initial session protocol terminal to switch method and the device of active/standby server, by SIP, is called out and is sent after INVITE, according to call state, judges whether server carries out active and standby switching.Compared with prior art, the embodiment of the present invention overcome in existing SIP signaling, detect that server is insensitive, heartbeat or notification message interoperability is poor, to the problem such as network requirement is higher, network and terminal do not need to support heartbeat and notification message, only with call state, just can judge whether to carry out active and standby switching, practicality is good, and flow process is succinctly reliable.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1. initial session protocol sip terminal switches a method for active/standby server, it is characterized in that, comprising:
When sip terminal is successfully registered to after master server, to master server, send invitation message and wait for the feedback of master server;
Within the scheduled time, receive the wrong gateway messages of master server feedback, or through repeatedly retransmitting invitation message, still do not receive any response message of master server feedback, be switched to standby server.
2. method according to claim 1, it is characterized in that, preset time-out time and the re-transmission time of invitation message, while not receiving any response message of master server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of master server, until receive, when the response message of master server or predetermined time-out time finish, stop sending invitation message; If still do not receive any response message of master server feedback when predetermined time-out time finishes, be switched to standby server.
3. method according to claim 1, it is characterized in that, preset number of retransmissions and the re-transmission time of invitation message, while not receiving any response message of master server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of master server, until receive, when the response message of master server or predetermined number of retransmissions finish, stop sending invitation message; If still do not receive any response message of master server feedback when predetermined number of retransmissions finishes, be switched to standby server.
4. according to the method in claim 2 or 3, it is characterized in that, the described predetermined re-transmission time is the time series increasing progressively.
5. according to the method described in any one in claim 1 to 3, it is characterized in that, also comprise:
Sip terminal is switched to after standby server registration success, to standby server, sends invitation message;
Within the scheduled time, receive the wrong gateway messages of standby server feedback, or when repeatedly retransmitting invitation message and still do not receive any response message of standby server feedback, be switched to master server.
6. method according to claim 5, it is characterized in that, preset time-out time and the re-transmission time of invitation message, while not receiving any response message of standby server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of standby server, until receive, when the response message of standby server or predetermined time-out time finish, stop sending invitation message; If still do not receive any response message of standby server feedback when predetermined time-out time finishes, be switched to master server.
7. method according to claim 5, it is characterized in that, preset number of retransmissions and the re-transmission time of invitation message, while not receiving any response message of standby server feedback within the predetermined re-transmission time, again send invitation message and wait for the feedback of standby server, until receive, when the response message of standby server or predetermined number of retransmissions finish, stop sending invitation message; If still do not receive any response message of standby server feedback when predetermined number of retransmissions finishes, be switched to master server.
8. initial session protocol sip terminal switches a device for active/standby server, it is characterized in that, comprising:
Sending module, for being successfully registered at sip terminal after master server or standby server, sending invitation message and waits for master server or the feedback of standby server to master server or standby server;
Judging treatmenting module, for receiving in the given time the wrong gateway messages of master server or standby server feedback, or while still not receiving any response message of master server or standby server feedback through repeatedly retransmitting invitation message, be switched to standby server or master server.
9. device according to claim 8, it is characterized in that, preset time-out time and the re-transmission time of invitation message, described judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again trigger described sending module and send invitation message and wait for master server or the feedback of standby server, until receive, when the response message of master server or standby server or predetermined time-out time finish, stop sending invitation message; If still do not receive any response message of master server or standby server feedback when predetermined time-out time finishes, be switched to standby server or master server.
10. device according to claim 8, it is characterized in that, preset number of retransmissions and the re-transmission time of invitation message, described judging treatmenting module specifically for, while not receiving any response message of master server or standby server feedback within the predetermined re-transmission time, again send invitation message and wait for master server or the feedback of standby server, until receive, when the response message of master server or standby server or predetermined number of retransmissions finish, stop sending invitation message; If still do not receive any response message of master server or standby server feedback when predetermined number of retransmissions finishes, be switched to standby server or master server.
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| CN201210327419.9A CN103685166A (en) | 2012-09-06 | 2012-09-06 | Method and device for switching between main server and standby server for session initiation protocol terminal |
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| CN111884847B (en) * | 2020-07-20 | 2022-06-28 | 北京百度网讯科技有限公司 | Method and device for processing fault |
| CN112532452A (en) * | 2020-11-30 | 2021-03-19 | 厦门亿联网络技术股份有限公司 | Switching method, device and equipment of communication terminal main and standby servers and storage medium |
| CN112532452B (en) * | 2020-11-30 | 2023-10-31 | 厦门亿联网络技术股份有限公司 | Method, device, equipment and storage medium for switching main server and standby server of communication terminal |
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