Title :
Joint routing and subcarrier allocation for OFDMA-based relay systems
Author :
Han, Jing ; Lv, Jingyang ; Liang, Tong ; Zhang, Jietao
Author_Institution :
Dept. of Inf. Eng., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
A new resource allocation scheme for joint routing and subcarrier allocation is proposed in the orthogonal frequency division multiple access (OFDMA)-based relay system. The objective of the scheme is to maximize the system throughput while guaranteeing the user QoS (quality of service) requirements. The optimization problem is tackled in a graph-theoretic perspective. The simulation results reveal that the proposed scheme is an optimal solution to the problem and achieves better system performance compared to conventional heuristic methods while keeping the computational complexity relatively low.
Keywords :
OFDM modulation; computational complexity; frequency division multiple access; graph theory; quality of service; resource allocation; telecommunication network routing; OFDMA-based relay systems; QoS requirements; computational complexity; graph-theoretic perspective; heuristic methods; joint routing-subcarrier allocation; optimization problem; orthogonal frequency division multiple access system; quality of service; resource allocation; Computational complexity; Computational modeling; Frequency conversion; Graph theory; Quality of service; Relays; Resource management; Routing; System performance; Throughput; OFDMA; graph theory; routing; subcarrier allocation;
Conference_Titel :
Communications and Networking in China, 2008. ChinaCom 2008. Third International Conference on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4244-2373-6
Electronic_ISBN :
978-1-4244-2374-3
DOI :
10.1109/CHINACOM.2008.4685096
