Patent ID: 7330470
Filing Date: 2008-02-12
Classification: H04L

Abstract:
1. A router for serving a communication terminal which sends a REGISTER message including a user identifier and a terminal identifier and for performing Quality of Service (QoS) control for each user under an instruction from a Session Initiation Protocol (SIP) server; the router being used in a network system comprising: a SIP server for storing a terminal identifier of the communication terminal, a router identifier of the router serving the communication terminal, and a certain QoS type, in association with the user identifier, and for instructing the router identified by the corresponding router identifier to perform QoS control in accordance with the QoS type corresponding to the user identifier or the terminal identifier; the router comprising: means for judging whether a received packet or a received message is a SIP message; means for analyzing and determining whether the message judged to be a SIP message is a REGISTER message, for adding the router identifier of the router to the REGISTER message including the user identifier and terminal identifier given by the communication terminal if the message is a SIP message and a REGISTER message, and for transferring the REGISTER message including the added router identifier to the SIP server so that the terminal identifier and router identifier stored in association with the user identifier are updated in the SIP server; means for receiving a QoS control instruction corresponding to the QoS type associated with the user identifier or the updated terminal identifier, from the SIP server; and means for performing QoS control for each user under the received instruction.