Adaptive Scheduling at Mobiles for Wireless Networks with Multiple Priority Traffic and Multiple Transmission Channels

Abstract

This paper considers scheduling algorithms for an infrastructure network where: (i) multiple channels are available per cell and (ii) mobile reservation and basestation scheduling protocol is used for medium access. The paper describes adaptive scheduling algorithms implemented at the mobile which modify the allocation provided by the base station. The motivation to do this is that under certain conditions, a mobile may wish to re-allocate its transmission slots between its priority queues based on the current queue status and other information. We propose an aging priority scheme where sessions who were forced to give up their allocated slots are provided increasing priority. The overall performance improvement for higher priority packets and corresponding performance degradation for lower priority packets is studied using discrete event simulation.