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International Journal of Wireless and Microwave Technologies(IJWMT)

ISSN: 2076-1449 (Print), ISSN: 2076-9539 (Online)

Published By: MECS Press

IJWMT Vol.1, No.5, Oct. 2011

Reduction of Feedback Based-on User Traffic Rate in OFDM Relay System

Full Text (PDF, 257KB), PP.31-38


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Author(s)

Qian-Bin Chen,Guang-Jian Jiang,Lun Tang

Index Terms

Feedback reduction; traffic rate; OFDM; relay

Abstract

In order to reduce feedback while maintaining user performance in multiuser orthogonal frequency division multiplexing (OFDM) relay system, feedback mechanism based on user traffic rate is proposed. From the aspects of feedback outage probability, user weighted channel gain related to user traffic rate is compared with the system threshold. The higher user traffic rate is, the bigger the user traffic weight becomes. So the high traffic rate user has greater probability to be fed back, which can support different traffic rate. Simulation results show that the proposed feedback mechanism can bring more feedback sub-carriers to the user with high traffic rate.

Cite This Paper

Qian-Bin Chen,Guang-Jian Jiang,Lun Tang,"Reduction of Feedback Based-on User Traffic Rate in OFDM Relay System", IJWMT, vol.1, no.5, pp.31-38, 2011.

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