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Capacity Planning for Group-Mobility Users in OFDMA Wireless Networks

EURASIP Journal on Wireless Communications and Networking volume 2006, Article number: 075820 (2006) Cite this article

Abstract

Because of the random nature of user mobility, the channel gain of each user in a cellular network changes over time causing the signal-to-interference ratio (SNR) of the user to fluctuate continuously. Ongoing connections may experience outage events during periods of low SNR. As the outage ratio depends on the SNR statistics and the number of connections admitted in the system, admission capacity planning needs to take into account the SNR fluctuations. In this paper, we propose new methods for admission capacity planning in orthogonal frequency-division multiple-access (OFMDA) cellular networks which consider the randomness of the channel gain in formulating the outage ratio and the excess capacity ratio. Admission capacity planning is solved by three optimization problems that maximize the reduction of the outage ratio, the excess capacity ratio, and the convex combination of them. The simplicity of the problem formulations facilitates their solutions in real time. The proposed planning method provides an attractive means for dimensioning OFDMA cellular networks in which a large fraction of users experience group-mobility.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering (ECE), University of British Columbia (UBC), Vancouver, BC, V6T 1Z4, Canada

    Ki-Dong Lee & Victor C. M. Leung

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  1. Ki-Dong Lee
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  2. Victor C. M. Leung
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Correspondence to Ki-Dong Lee.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Lee, KD., Leung, V.C.M. Capacity Planning for Group-Mobility Users in OFDMA Wireless Networks. J Wireless Com Network 2006, 075820 (2006). https://doi.org/10.1155/WCN/2006/75820

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  • DOI: https://doi.org/10.1155/WCN/2006/75820

Keywords

  • Wireless Network
  • Problem Formulation
  • User Experience
  • Cellular Network
  • User Mobility