Title :
Priority-Based Resource Allocation for RT and NRT Traffics in OFDMA Systems
Author_Institution :
Dept. of Commun., Opt. & Mater., Tech. Univ. of Denmark, Lyngby
Abstract :
In this paper, we address the problem of adaptive radio resource allocation and QoS provisioning for real-time (RT) and non-real-time (NRT) services in OFDMA systems. The proposed algorithm tightly couples the subchannel allocation and packet scheduling together through an integrated cross-layer approach in which each packet is assigned a priority value by taking both the instantaneous channel condition and the QoS requirements into account. An efficient suboptimal algorithm with low computational complexity is proposed to solve the linear optimization problem. Simulation results show that the proposed algorithm can greatly improve the system performance in terms of high spectral efficiency and low outage probability compared to the traditional TDMA algorithm, thus is very suitable for the downlink of current OFDMA systems.
Keywords :
channel allocation; computational complexity; frequency division multiple access; optimisation; quality of service; scheduling; time division multiple access; OFDMA systems; QoS; computational complexity; integrated cross-layer approach; linear optimization problem; nonreal-time services; packet scheduling; priority-based resource allocation; real time services; spectral efficiency; subchannel allocation; traditional TDMA algorithm; Adaptive optics; Bit rate; Computational modeling; Delay; Downlink; Optical materials; Quality of service; Real time systems; Resource management; Scheduling algorithm;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
DOI :
10.1109/WICOM.2007.204