Patent ID: 9497183
Filing Date: 2016-11-15
CPC Classification: H04L,H04W

Claim Text:
1. A method for authorizing access by a user device to at least one service offered over an Internet Protocol (IP) network, comprising: receiving, by a server, a SIP message from the user device, wherein the SIP message includes information that indicates that the user device is configured to support the at least one service; retrieving from a database, by the server, policy data associated with the user device; validating, by the server, based on the policy data that the user device is authorized to advertise the at least one service and the at least one service is available for access by the user device; and when said validating determines that the at least one service is unauthorized or unavailable for access by the user device, modifying, by the server, the received message to generate a modified message, modifying said received message including omitting from said modified message information corresponding to the at least one service that is unauthorized or unavailable for access by the user device while including information from said received message indicating one or more authorized and available services for the user device; forwarding, by the server, the modified message to a second user device or to a network server; and dynamically updating the policy data associated with the user device based on a change in at least one parameter associated with the user device or the IP network.