a method of operating a communication system for providing packet services , the method comprising receiving a session setup request for a session , processing the session setup request to select an end point for the session , determining a first resource group of a plurality of resource groups associated with the end point , determining a first profile of a plurality of profiles of the resource group , determining if the session will violate the first profile , and generating an authorization message for the session in response to determining that the session will not violate the first profile .