Downlink throughput enhancement by combining packet scheduling with a simple power control scheme in CDMA data networks

|CDMA data networks such as the Qualcomm High Data Rate (HDR) are proposed in the midst of evolving to the 3rd generation wireless networks. The downlink transmission power is xed for all users in HDR systems unlikely IS-95 systems that are designed for the voice service only. The HDR systems endeavour to utilize the bandwidth eÆciently by selecting the optimal transmission rate for the current channel state, which yields similar e ects to the power control. There remains the possibility, however, to get additional bene ts from the power control. Inter-cell interference can be alleviated by reducing the transmission power to the users close to a basestation (BS) without sacri cing their transmission rates. In this paper, we propose a simple twolevel power control scheme that uses the full power and the reduced power alternately, and combine it with some packet scheduler to increase the system throughput. Simulation results show that the cell throughput has been improved by about 10-20%. Index Terms|CDMA data networks, HDR, downlink, throughput, power control, packet scheduler