METHOD AND SYSTEM FOR SIP CALL PROCESS TO ENSURE QOS USING VOIP PBX

摘要

The present invention relates to an SIP call processing method and an SIP call processing system to guarantee a dynamic QoS for each subscriber in a VoIP-based voice communication system. The SIP call processing method to guarantee a QoS by using the same VoIP exchange according to one implementation example of the present invention comprises the following steps: a step wherein a transmission terminal transmits an SIP invite message for a reception terminal to a voice over internet protocol (VoIP) exchange; a step wherein the VoIP exchange checks a quality of service (QoS) level of the transmission terminal a QoS level of the reception terminal, selects either the QoS level of the transmission terminal or the QoS level of the reception terminal, and maps a differentiated services code point (DSCP) code by using the selected QoS level; and a step wherein the VoIP exchange transmits an SIP invite message containing the DSCP code to the reception terminal. [Reference numerals] (AA) Start;(BB) End;(S110) Store a QoS level for each subscriber in a VoIP exchanger;(S120) Request for making a call from a transmission terminal;(S130) Request for a Qos level of the transmission terminal or a reception terminal;(S140) VolP exchanger determines a QoS level;(S150) Map a DSCP code based on the QoS level;(S160) Deliver a calling request including the DSCP code to the reception terminal;(S170) Deliver a response to the calling request including the DSCP code to the transmission terminal;(S180) Transmission terminal and reception terminal display the DSCP code transmitted from the VolP exchanger to an RTP packet