Abstract:

A cross-layer radio resource allocation scheme is proposed with guaranteed divers quality of service ( QoS) for multi-user orthogonal frequency division multiplex （OFDM） system. In order to maximize the system throughput under satisfying the QoS requirement of real-time and non-real-time services, packet scheduling, subchannel allocation and adaptive modulation and coding （AMC）schemes are jointly designed. The channel dependent earliest due date (CD-EDD) and minimum rate request(MRR) disciplines are employed for the resource allocation for real-time and non-real-time services respectively. The performance of the proposed algorithm is evaluated on the IEEE 802.16 standard-based dynamical system-level simulation. The results reveal that the proposed algorithm can perform better than maximum signal noise ratio strategy in terms of average packet delay and user fairness with the near throughput.

Key words: IEEE 802.16, cross-layer, orthogonal frequency division multiple access, quality of service