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Cross-layer Resource Allocation Algorithm for OFDMA System

HE Hai-lang

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Abstract

OFDM,for its high spectral efficiency and ability in mitigating the effects of multi-path channel propagation,is reguarded as the core technology in LTE and 4G.OFDM-based OFDMA is a promising access method,in which multiple users are allowed to transmit signals simultaneously on different sub-carriers.The cross-layer resource allocation algorithm for OFDMA systems is studied,and the cross-layer resource allocation algorithm with rate proportional fairness is analyzed.Simulation results show that this algorithm could achieve fairly high system throughout and relatively low service delay,while ensuring the fairness between among the users.

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What this paper is about

OFDM,for its high spectral efficiency and ability in mitigating the effects of multi-path channel propagation,is reguarded as the core technology in LTE and 4G.OFDM-based OFDMA is a promising access method,in which multiple users are allowed to transmit signals simultaneously on different sub-carriers.The cross-layer resource allocation algorithm for OFDMA systems is studied,and the cross-layer resource allocation algorithm with rate proportional fairness is analyzed.Simulation results show that this algorithm could achieve fairly high system throughout and relatively low service delay,while ensuring the fairness between among the users.

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Available abstract

OFDM,for its high spectral efficiency and ability in mitigating the effects of multi-path channel propagation,is reguarded as the core technology in LTE and 4G.OFDM-based OFDMA is a promising access method,in which multiple users are allowed to transmit signals simultaneously on different sub-carriers.The cross-layer resource allocation algorithm for OFDMA systems is studied,and the cross-layer resource allocation algorithm with rate proportional fairness is analyzed.Simulation results show that this algorithm could achieve fairly high system throughout and relatively low service delay,while ensuring the fairness between among the users.

Key concepts: Computer science, Orthogonal frequency-division multiplexing, Resource allocation, Orthogonal frequency-division multiple access, Spectral efficiency, Computer network, Channel (broadcasting), Physical layer

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