These exemplary embodiments utilize Sessions Initiation Protocol (SIP) for admission control. The use of the SIP allows a SIP server itself to perform the admission control function. The use of RSVP linkages is reduced. The use of SIP for admission control allows an application to communicate, or “talk,”...http://www.google.com.hk/patents/US20060039367?utm_source=gb-gplus-share專利 US20060039367 - SIP-based session control
