Delay Statistics and Throughput Performance for Multi-Rate Wireless Networks Under Multiuser Diversity

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Executive Summary

An analytical framework for radio link level performance evaluation under scheduling and Automatic Repeat reQuest (ARQ)-based error control in a multi-rate wireless network is presented. The multi-rate transmission is assumed to be achieved through Adaptive Modulation and Coding (AMC) in a correlated fading channel. The analytical framework, which is developed based on a vacation queueing model, can be applied to any scheduling scheme as long as the evolution of the joint service/vacation and channel processes can be determined. The exact statistics of queue length and delay are obtained and the radio link level throughput is calculated under both saturated and non-saturated buffer scenarios.

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