Title :
A low complexity resource allocation method for relay OFDMA systems
Author :
Song, Gaojun ; Liu, Hongwu
Author_Institution :
Inf. Eng. Sch., Nanchang Hangkong Univ., Nanchang, China
Abstract :
In this paper, the resources allocation for the Orthogonal Frequency Division Multiple Access (OFDMA) based two-hop relay network is addressed. Due to a high degree of users mobility, the Base Station is assumed to have only a statistical knowledge of the users channels. Based on the outage capacities connected to the user rates, a relay selection, sub-carrier and power allocation method that minimizes the total transmitted power is proposed. The optimum solutions for the resources allocation are derived based on a dual formulation and a simple sub-optimal algorithm is proposed. Simulation results show that the presented algorithm may improve radio resource allocation efficiency and reduce the average transmit power.
Keywords :
OFDM modulation; resource allocation; base station; dual formulation; low complexity resource allocation; power allocation; radio resource allocation efficiency; relay OFDMA systems; sub-carrier; sub-optimal algorithm; two-hop relay network; users mobility; Base stations; Complexity theory; Joints; Land mobile radio cellular systems; Optimization; Relays; Resource management; OFDMA; Outage capacity; Relay; resources allocation;
Conference_Titel :
Information Theory and Information Security (ICITIS), 2010 IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-6942-0
DOI :
10.1109/ICITIS.2010.5689731
