QoS-driven rate control strategies for W-CDMA systems

The paper summarizes the development of a genetic-based rate control algorithm. The aspect of rate control design focused on is specifically for implementation on the link/network layers. In this respect, the underlying concept is to adjust the transmission rate dynamically, subject to variations in network conditions such that distinct QoS requirements from individual users are complied with. The novelty of this work is mainly from two points of view: the consideration of near-far effects in the assignment of transmission power; the dynamic allocation of bandwidth in accordance with the variations in network conditions which include, but are not limited to, traffic characteristics and network loading. Simulation results show that the proposed rate control algorithm not only reduces the undesirable outage probability, but also increase the overall system throughput due to a reduced number of necessary retransmissions.