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

fYear

2010

fDate

17-19 Dec. 2010

Firstpage

1054

Lastpage

1057

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Theory and Information Security (ICITIS), 2010 IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-6942-0

Type

conf

DOI

10.1109/ICITIS.2010.5689731

Filename

5689731