Mobility

A Cross-Layer Design of Wireless IP Systems Using Effective Bandwidth and MQAM Adaptive Modulation

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Executive Summary

In this paper, the authors introduce an effective bandwidth-based Call Admission Control (CAC) with adaptive modulation technique to manage the traffic in a wireless IP-based network. Furthermore, in order to efficiently use the physical resources of the network, they take advantage of an adaptive MQAM (M-ary Quadrature Amplitude Modulation) to match transmission rates to the time-varying channel conditions. This cross-layer architecture has been examined for the self-similar traffic model. The results show that by simultaneous implementation of the effective bandwidth algorithm in the data-link layer and adaptive modulation technique in the physical layer, the performance of the wireless network in terms of the number of rejected calls and system throughput improves.

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