A NETWORK FOR UTILIZING SESSION INITIATION PROTOCOL FOR IDENTIFYING USER EQUIPMENT RESOURCE RESERVATION SETUP PROTOCOL CAPABILITIES

摘要

A network for utilizing session initiation protocol for identifying UE(user equipment) resource reservation setup protocol capabilities is provided to supply a mechanism to inform RSVP(Resource Reservation Setup Protocol) capabilities of a UE and a GGSN(Gateway General packet radio System) each other before any communication takes place using an RSVP. An apparatus adopted in a network for call setup includes a P-CSCF(Proxy-Call State Control Function) unit and an S-CSCF(Serving-Call State Control Function). The P-CSCF unit receives an SIP(Session Initiation Protocol) message integrating an SDP(Session Description Protocol) including bandwidth requirements from call initiate UE and media characteristics of transmitted media types and forwards the SIP message to the S-CSCF unit after removing UE requests not to be allowed by a network policy. The S-CSCF unit forwards the message to a remote network including terminal UE in the message after removing requested selections which the UE does not initiate.