Patent ID: 8249077

Claim:
A method for establishing an internet protocol multimedia subsystem communication session having a predetermined quality of service comprising: receiving a request to establish an internet protocol multimedia subsystem communication session between a calling party and a called party; allocating resources for the communication session based on predetermined configuration information related to the calling party and the called party, the predetermined configuration information based on prior peering business agreements pertaining to codecs and media both the calling party and the called party support and a predetermined quality of service for the internet protocol multimedia subsystem communication session; and determining a signal path for the internet protocol multimedia subsystem communication session, wherein the request to establish an internet protocol multimedia subsystem communication session is received from user equipment associated with the calling party, the allocating resources is in response to receiving the request from the user equipment associated with the calling party, the user equipment associated with the calling party is configured to not respond to messages from user equipment associated with the called party with messages indicating the type of codec and media for use during the communication session, and the user equipment associated with the called party is configured to not expect a response from the user equipment associated with the calling party indicating the type of codec and media for use during the communication session.