An efficient subcarrier and power allocation algorithm for dual-service provisioning in OFDMA based wibro systems

Authors:
Mohmmad Anas;Kanghee Kim;Jee Hwan Ahn;Kiseon Kim
Affiliations:
Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea;Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea;Electronics and Telecommunications Research Institute (ETRI), Daejeon, Republic of Korea;Department of Information and Communications, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
Venue:
ICOIN'05 Proceedings of the 2005 international conference on Information Networking: convergence in broadband and mobile networking
Year:
2005

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Abstract

This paper investigates the problem of resource allocation for quality of service (QoS) support in Orthogonal Frequency Division Multiple Access (OFDMA) based WiBro systems. We identify the key QoS parameters as data rate and bit error rate (BER), which are used to determine the individual traffic demands. We propose a resource allocation algorithm to provide dual-service, Guaranteed Performance (GP) and Best Effort (BE) differentiated on the basis of required QoS. Subcarrier assignment and power allocation are carried out sequentially to reduce the complexity, and GP users are given priority over BE users in assigning subcarrier and allocating power. We present the simulation results of the proposed algorithms applied to frequency selective Rayleigh fading channel with additive white Gaussian noise (AWGN) and OFDMA.