Providing Conformance of the Negotiated QoS using Traffic Conditioning for Heterogeneous Services in WCDMA Radio Access Networks

In order to provide negotiated QoS to the end users in next generation mobile networks, a traffic conditioner may be deployed to provide conformance of a service agreement. The traffic conditioning is performed by traffic shaping or/and policing. A framework of applying traffic conditioning in radio access network is proposed in this paper. The main idea of our traffic conditioning approach is to employ traffic shaping at each User Equipment (UE) and traffic policing at the Radio Network Controller (RNC). The traffic generated by the application is regulated by the token bucket traffic shaper at each UE, and the conformance of the traffic is policed at the RNC according to traffic policing policy. We investigate the impact of traffic shaping at various system load, as well as the tradeoffs between concerned QoS parameters for heterogeneous traffic classes. A system level simulation model based on the proposed framework is implemented. The numerical results regarding shaping delay, probability of non-compliance and packet loss ratio are also presented in this paper.