Dynamic Priority-based Resource Allocation for Uplinks in IEEE 802.16 Wireless Communication Systems

摘要

In this paper, a dynamic priority-based resource allocation (DPRA) scheme is proposed for uplinks in IEEE 802.16 wireless communication systems. The goal of the DPRA scheme is to maximize the system throughput while satisfying diverse QoS requirements. Four types of multimedia traffic are considered, where these multimedia traffic are given urgency degrees via dynamic priority values, and the radio resources are allocated according to their priority values. Also the DPRA scheme performs consistent allocation for packets with multimedia traffic in aspects of subchannel, modulation order, and power. Simulation results show that the proposed DPRA scheme outperforms the conventional algorithm in system throughput by an amount of 15%. The rtPS packet dropping rate of DPRA scheme is 70% lower than other schemes and satisfies QoS requirements. Besides, the proposed DPRA scheme can achieve less computational complexity and lower transmission overhead.