Reservation-based bandwidth allocation in a radio ATM LAN

The comparative performance of a number of reservation-based bandwidth sharing policies that could be used to maximize the link utilization and/or offer equally fair or preferential treatment to a class of supported users, is examined here in the context of a radio ATM LAN. Our analytical results, based on a recursion for the link occupancy distribution originally suggested by Kaufman (1981) and Roberts (1981) independently and subsequently extended to include finite source population models, are further extended here in the cases of equal sharing of the resources with retries, and a dynamic sharing mechanism in which, when the available capacity is exceeded, weighted reductions for the active users' rates and queueing are employed. Next, examining the application of the above sharing schemes in an indoor radio environment, we apply Reed Solomon based forward error correction (FEC) to recover radio-related packet losses. The performance and the effects of a fading-mitigating switched-antenna-diversity mechanism and the required packet-basis coding protection, are subsequently taken into account in order to establish the actual radio link throughput under the above circumstances.