Research Article
QoS-Driven Power Control for Downlink Multiuser Communications Over Parallel Fading Channels in Mobile Wireless Networks
@INPROCEEDINGS{10.1145/1577222.1577250, author={Qinghe Du and Xi Zhang}, title={QoS-Driven Power Control for Downlink Multiuser Communications Over Parallel Fading Channels in Mobile Wireless Networks}, proceedings={4th International ICST Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness}, publisher={ACM}, proceedings_a={QSHINE}, year={2007}, month={8}, keywords={Multiuser downlink communications resource allocation ef- fective capacity wireless networks optimization.Design Performance.}, doi={10.1145/1577222.1577250} }- Qinghe Du
Xi Zhang
Year: 2007
QoS-Driven Power Control for Downlink Multiuser Communications Over Parallel Fading Channels in Mobile Wireless Networks
QSHINE
ACM
DOI: 10.1145/1577222.1577250
Abstract
We propose a power adaptation scheme for downlink mul- tiuser communications over parallel fading channels in mo- bile wireless networks. This model can be applied to the case of time division or frequency division downlink transmis- sion over broadcast channels in cellular networks. Speci¯- cally, our proposed scheme aims at optimizing the sum of the weighted e®ective capacity over all users each with a spec- i¯ed statistical delay quality of services (QoS) constraint, called QoS exponent. Using a two-step method, we derive the optimal power adaptation policy for the above problem. Numerical evaluations are also presented to investigate the impact of the delay QoS on optimizing the weighted sum e®ective capacity and that on the power allocation across di®erent users.
