Position-based packet data scheduling for multi-class CDMA downlinks

We previously proposed a method to control the downlink packet flow at the base stations of CDMA wireless networks where we maximize data throughput while ensuring fairness among users. In this work, we investigate important issues for realistic implementations. Firstly, we evaluate the network performance when cell subdivision into zones is used for the purpose of complexity reduction. We show up to 50% reduction, for a minimal loss in total throughput. Secondly, a modified algorithm is proposed to support multi-class users. The results provided show that priority for distant users requesting high data rates can be maintained with no significant decrease in total throughput. Finally, the compromise between short-term fairness ensured by our algorithm and long-term fairness taking benefit of mobility is also studied.