A method to promote connectivity between a user agent (UA) and a packet data network (PDN) is provided. The method comprises determining a quality of service class identifier (QCI) to associate with a service data flow, determining a sense of change in at least one of a priority, a packet delay budget, and a packet error loss rate of the QCI to associate with the service data flow, and sending a request to establish a service data flow treatment, the request comprising the QCI and a QCI extension encapsulating the sense of change of the QCI.