Title :
A Joint Power and Rate Control Algorithm and Fairness Enhancement for Multiuser OFDM System
Author :
Xiaoyu Wei ; Larsson, Peter
Abstract :
A joint adaptive power and adaptive rate (APAR) control algorithm for OFDM systems that aims at sum-rate maximization, subject to certain power and rate constraints, is presented in this paper. In the basic optimization framework, the overall system throughput is the main objective, but as such it lacks user fairness consideration. Two scheduling schemes that allow adjusting the trade-off between fairness and throughput are proposed and combined with the APAR scheme for fairness enhancement. Simulation results show that enhanced system performance and balanced efficiency-fairness trade-off can be achieved by the proposed schemes in downlink.
Keywords :
OFDM modulation; multi-access systems; optimisation; scheduling; adaptive power control algorithm; adaptive rate control algorithm; balanced efficiency-fairness trade-off; enhanced system performance; fairness enhancement; multiuser OFDM system; scheduling schemes; sum-rate maximization; Adaptive control; Constraint optimization; Control systems; Iterative algorithms; OFDM; Programmable control; Resource management; Scheduling algorithm; System performance; Throughput;
Conference_Titel :
Vehicular Technology Conference, 2008. VTC 2008-Fall. IEEE 68th
Conference_Location :
Calgary, BC
Print_ISBN :
978-1-4244-1721-6
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2008.391