A cross-layer design for QoS support in the 3GPP2 wireless systems

Due to the non-stationary wireless links and the rapid increase of new types of applications that require different levels of QoS parameters, the support for better QoS for the emerging 3GPP2 multimedia wireless applications is strongly needed. These parameters include: priority, delay, data loss, and data rate. Many possible combinations of system parameters have been specified in the current 1/spl times/EV-DV standard. However, there are no specifications about the dynamic resource allocations, i.e. the selection of optimal combination of system parameters such as the number of Walsh codes, the number of time slots, the modulation scheme, and the channel code rate. In this paper, a suite of cross-layer design modules for QoS support in the 1/spl times/EV-DV system is proposed. Our proposed design is composed of several modules build on top of each other. They include the priority admission control which admits users according to their QoS priority profiles, the resource allocation control module which is responsible for allocating the optimal combination of all system parameters, and the resource scheduling control module which aims at achieving a better overall throughput gain and guarantees the QoS requested by different users' service levels. The proposed dynamic resource allocation scheme is based on the effective capacity concept. Performance evaluation of the proposed cross-layer design has been carried out under a mix of traffic types.