Patent ID: 8121028

Claim:
A communication system comprising: a modem coupled to a cable modem termination system; a device coupled to the modem configured to transmit an alias and a dynamic Internet Protocol (IP) address for the modem to a database, and to transmit an invite message for a session, wherein the alias identifies the device and not the dynamic IP address of the modem, and the invite message indicates a destination and the alias; a proxy system configured to receive the invite message and transfer a quality request wherein the quality request indicates the alias; a policy system configured to receive the quality request, determine a quality level for the session and transmit a quality message to the cable modem termination system indicating the alias and the quality level; and the cable modem termination system configured to receive the quality message, transmit a query to the database indicating the alias, receive the dynamic IP address for the modem in response to the query, identify traffic for the session using the dynamic IP address for the modem, and apply the quality level to the traffic.