SIP-based user registration method, system, terminal and server

摘要

A session initiation protocol (SIP)-based user registration method, a system, a terminal, and a server are provided. The method includes the following blocks. A terminal sends a registration request message (303) carrying a user number to a registrar; and then, the terminal receives a message (304) returned by the registrar. When the message indicates that the user number has already been registered on other terminal and it is determined to replace the registration on the other terminal (305), the terminal sends a message (306,308) requesting to replace a previous registration to the registrar adapted to request to replace the registration on the other terminal with the current registration. Another SIP-based user registration method is provided. The method includes the following blocks. A registration request message (303) carrying a user number is received sent by a terminal; after discovering the user number has already been registered on other terminal, a message (304) indicating that the user number has already been registered on the other terminal is sent to the terminal; and then, on receiving a message (306,308) of requesting to replace a previous registration returned by the terminal, the terminal sending the request is registered, and the registration on the other terminal are deregistered and further information (310) is sent to inform that the registration on the other terminal has been deregistered. Through the present invention, the user may register on the other terminal before deregistering the original registration.