Bandwidth oscillations control and quality of service in CDMA-2000 interconnections

The common 'finite-burst' mode of wireless links scheduling in CDMA-2000 data networks is featured with rate variations causing system bandwidth swings and degraded system performances. The shared nodes at the CDMA-2000 data network are constructed with rate mismatch allowing large traffic variations at the bottleneck node whereas the feeding node is largely underutilized. The CDMA-2000 data network standard offers a single level of service, which cannot differentiate between today's applications' distinct QoS requirements.; We investigate RED performances in the context of CDMA-2000 as a function of its controls' configuration space using both formal mathematics and simulations. RFD's transient response is examined using fluid-flow approximation, and a non-linear estimator on the overflow-based drop burst size is derived. We extend previous performance evaluation studies of the bandwidth-swings effects via simulations, allowing various TCP versions as well as unresponsive traffic (UDP) through the system. We identify the system's distinct areas of operation as a function of the bottleneck's RED controls. We perform bottleneck RED queue tune-up via simulation and identify its superior settings.; We evaluate the 3GPP2 proposal of backpressure in CDMA-2000 for protecting the bottleneck queue during congestion scenarios. We propose a feedback flow-control model for tandem nodes at CDMA-2000. We demonstrate the performance benefits and stress the pertaining costs.; We evaluate the DiffServ architecture for CDMA-2000 data-networks. We propose a QoS model that adapts the DiffServ building blocks to the CDMA-2000 distinct architecture and constraints by employing our feedback flow-control mechanism.