Packet Fair Queueing Scheduling Based on Multirate Multipath-Transparent CDMA for Wireless Networks

The traditional layered approach to wireless networks (network, data link, and physical layer) utilizes suboptimally the limited available capacity. We propose a Quality of Service wireless framework based on the joint design of a packet fair queuing scheduler, demand-assignment Medium Access Control (MAC) protocol, and Multirate Multipath-Transparent CDMA-based physical layer. The unique code assignment procedure allows a direct mapping of the packet fair schedule to the physical layer transmission/reception, and supports transmission (service) rates of arbitrarily fine resolution. Judiciously designed user codes combat the harsh time-varying fading environment, and parsimonious code description minimizes overhead in the MAC. Simulations illustrate the merits of our designs. Keywords—packet fair queueing, multi-rate CDMA, multi-carrier systems, wireless packet multiple access