DocumentCode :
3347541
Title :
Throughput Maximization for OFDMA Cooperative Relaying Networks with Fair Subchannel Allocation
Author :
Li, Hongxing ; Luo, Hanwen ; Wang, Xinbing ; Li, Chisheng
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiao Tong Univ., Shanghai
fYear :
2009
fDate :
5-8 April 2009
Firstpage :
1
Lastpage :
6
Abstract :
In this paper, we consider the dynamic subchannel allocation problem in OFDMA-based selective relaying networks. Our goal is to maximize the total throughput under the constraint of total transmission power, while guaranteeing fairness on subchannel occupation by multiple destination nodes (users). Since the optimal solution to this optimization problem is extremely computationally complex to obtain, we decompose the original optimization problem into two subproblems. Firstly, we assign subchannels to the users with the best equivalent channel gains for them under the assumption of equal power distribution among all subchannels. Secondly, water-filling method is adopted to distribute the power to the determined links. Simulation results show that the performance of the proposed algorithm approaches asymptotically to that of the optimal one, while reducing computational complexity from exponential to linear with the numbers of subchannels, relay nodes and users. It is also shown that subchannel permutation (SP) scheme brings additional throughput gain to DF cooperative transmission.
Keywords :
OFDM modulation; channel allocation; optimisation; OFDMA cooperative relaying networks; OFDMA-based selective relaying networks; equal power distribution; fair subchannel allocation; multiple destination nodes; subchannel permutation scheme; throughput maximization; water-filling method; Bit error rate; Communications Society; Decoding; OFDM; Peer to peer computing; Power distribution; Power system relaying; Relays; Resource management; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
ISSN :
1525-3511
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
Type :
conf
DOI :
10.1109/WCNC.2009.4917991
Filename :
4917991
Link To Document :
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