Method for switching servers of SIP (Session Initiation Protocol) communication terminal

Abstract

The invention relates to a method for switching servers of a SIP (Session Initiation Protocol) communication terminal, which comprises the steps of: a, transmitting registration information to the SIP servers by a switching device; b, starting different timers for switching the servers by the switching device according to the number of the configured SIP servers and the registration condition of current servers; c, starting the procedure of switching the servers when the failure response of the servers is received by the switching device; d, starting the procedure of switching the servers when logout fails or an error response is received; e, returning to transmit the registration information to the SIP servers after waiting for registration refreshing time if the information of a characteristic code of 2000K is received by the switching device; f, registering again when any non-registration affairs fail; and g, transmitting heartbeat information in definite time by the switching device so as to detect whether the servers fail or not. The method solves the problem of error switching caused by abnormal conditions of networks, and can correct the error switching in time and enable VOIP (Voice over Internet Protocol) services to be in a usable state all the time.

Description

【Technical field】 [0001] The present invention relates to network voice communication (voice over internet protocol, VOIP for short) communication, in particular to a method for switching servers in a session initiation protocol (Session Initiation Protocol, SIP for short) communication terminal system. 【Background technique】 [0002] With the popularization and development of broadband services, network bandwidth is no longer a technical constraint for VoIP communications. Due to the low cost of VOIP voice services, telecom operators are pushing VOIP voice services, so VOIP services will gradually replace the traditional Public Switched Telephone Network (PSTN). However, due to network communication failure due to physical line, software failure, server load or other reasons, the server is temporarily overloaded, or the server temporarily interrupts the service, etc., so there is a redundant design in the network architecture. A general VOIP server has a main server and a ...

AI Technical Summary

Problems solved by technology

[0004] 1. In the network equipment that uses the Dynamic Host Configuration Protocol (Dynamic Host Configuration Protocol, referred to as DHCP) or the point-to-point connection protocol (point-to-point protocol over ethernet, referred to as PPPOE) dial-up network device, the network address obtained again after the network is interrupted It may be inconsistent with the previous ones, the device cannot send a logout message after the network is disconnected

After regaining the network address, the device initiates registration with the new network address, but because the previous registration has not been canceled, some servers do not allow the same account to register with two network addresses at the same time, so that the device cannot be registered temporarily, and the user will not be able to use it. voice service

[0005] 2. When the device is refreshing the registration, the network is temporarily interrupted, and the interruption time just exceeds the registration transaction cycle. At this time, the device switches to the backup server and the network recovers. However, the actual situation is that the main server has not failed. At this time, the device When switching to the backup server, the backup server will not allow the device to register, but the message returned by the backup server to the device makes the terminal unable to determine what caused the failure to register, resulting in the terminal being unable to switch servers

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