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Better CCI mitigation with optimized frequency reuse in multi-cell OFDMA systems

Published: 02 October 2006 Publication History

Abstract

In this paper, we investigate subcarrier assignment in downlink multi-cell Orthogonal Frequency Division Multiple Access (OFDMA) systems. As user bit rates are in continuous increase, the limitation of the available spectrum requires more and more efficient subcarrier assignment schemes. Assigning subcarriers is especially expensive in terms of bandwidth for users undergoing severe Co-Channel Interference (CCI) as they demand high bandwidths. In our study, we mitigate the interference impact with a particular frequency reuse partitioning strategy. We propose a new centralized and low-complexity algorithm that minimizes the outage probability in the entire system. With this algorithm, adaptive frequency reuse factors are applied according to users' bandwidth requirement. Simulation results show that our approach is particularly efficient for services that demand high bit rates.

References

[1]
Koffman, I. Roman, V.: Broadband Wireless Access Solutions Based on OFDM Access in IEEE 802.16. IEEE Comm. Magazine (April 2002).
[2]
Wong, C. Y. Cheng, R. S. Letaief, K. B. Murch, R. D.: Multi-user Subcarrier Allocation for OFDM Transmission using Adaptive Modulation. IEEE Journal on Selected Area in Communications Vol. 17 (Octobre 1999) 1747--1757.
[3]
Kivanc, D. Guoqing Li. Liu, H.: Computationally efficient bandwidth allocation and power control for OFDMA. Wireless Communications, IEEE Transactions on, Volume 2, Issue 6, (Nov. 2003) 1150--1158.
[4]
Li, G. Liu, H.: Downlink dynamic resource allocation for multi-cell OFDMA system. Vehicular Technology Conference, 2003. VTC 2003-Fall. 2003 IEEE 58th, Volume 3, 6-9 (Oct. 2003) 1698--1702.
[5]
Kwon, H. Lee, W. I. Lee, B. G.: Low-Overhead Resource Allocation with Load Balancing in Multi-cell OFDMA Systems. IEEE Vehicular Technology Conference Proceedings, 2005. VTC 2005-Spring (2005).
[6]
Lucatti, D. Pattavina, A. Trecordi, V.: Bounds and performance of reuse partitioning in cellular networks. INFOCOM '96. 15th Annual Joint Conference of the IEEE Computer Societies. Networking the Next Generation. Proceedings IEEE Volume 1, 24-28 (March 1996) 59--66.
[7]
Choi, J. Silvester, J. A.: A fair-optimal channel borrowing scheme in multi-service cellular networks with reuse partitioning. Universal Personal Communications, 1998. ICUPC '98. IEEE 1998 International Conference on Volume 1, 5-9 (Oct. 1998) 261--265.

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  1. Better CCI mitigation with optimized frequency reuse in multi-cell OFDMA systems

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        cover image ACM Conferences
        MobiWac '06: Proceedings of the 4th ACM international workshop on Mobility management and wireless access
        October 2006
        206 pages
        ISBN:159593488X
        DOI:10.1145/1164783
        Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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        Published: 02 October 2006

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        Author Tags

        1. OFDMA
        2. co-channel interference
        3. multi-cell
        4. reuse partitioning
        5. subcarrier assignment

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        MobiWac '06 Paper Acceptance Rate 18 of 60 submissions, 30%;
        Overall Acceptance Rate 83 of 272 submissions, 31%

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