Directional cell breathing: a module for congestion control and load balancing in WCDMA networks

Authors:
Khaled A. Ali;Hossam S. Hassanein;Abd-Elhamid M. Taha;Hussein T. Mouftah
Affiliations:
Queen's University, Kingston, ON, Canada;Queen's University, Kingston, ON, Canada;Queen's University, Kingston, ON, Canada;Ottawa University, Ottawa, ON, Canada
Venue:
Proceedings of the 2006 international conference on Wireless communications and mobile computing
Year:
2006

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Abstract

In this paper, we outline the basis of a novel cooperative module for congestion control and load balancing in WCDMA networks. Through carefully exploiting the capabilities of smart and directional antennas, we propose a controllable directional breathing where a base station's (BS) sectorized coverage is varied reactively in instances of congestion, and proactively in instances of exercising load balancing. This proposal, called Directional Cell Breathing (DCB), overcomes the drawbacks of non-sectorized and non-controllable WCDMA breathing management by optimizing the coverage level within each sector under constraints minding sectoral traffic load and interference bounds. Interference analysis is carried out to determine the eligibility of a cell to be considered in DCB if one of its adjacent cells becomes overloaded. This analysis is then used in a mathematical formulation to facilitate the optimization of the proposed scheme.