A Cross-Layer Resource Allocation Algorithm with Finite Queue for OFDMA System

A novel cross-layer wireless resource allocation scheme is proposed for Orthogonal Frequency Division Multiplex Access (OFDMA) system based on IEEE 802.16e Wireless MAN. With the assumption of a finite queue model, a distinct scheduling priority is defined for each user integrates MAC QoS requirements, queue status and PHY Channel State Information (CSI). Using these scheduling priorities, a scheduling rule for mixed traffics is proposed. Simulation results indicate that the proposed algorithm is efficient in terms of average system throughput, packet losing probability, and system fairness, while improving each user´s QoS performance.