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Dynamic channel assignment with cumulative co-channel interference

Published: 01 October 2004 Publication History

Abstract

This paper studies the problem of centralized dynamic channel assignment (DCA) in wireless cellular systems under space and time-varying channel demand. The objective is to minimize the number of channels required to satisfy demand while also satisfying co-channel interference constraints. Cumulative co-channel interference constraints govern channel reuse, via a threshold decision criterion based on the carrier-to-interference ratio. The paper makes two contributions. First, it provides an empirical bound on the difference between the minimal number of channels required based only on geographic reuse distance versus the cumulative interference case in the context of linearly increasing demand. The bound is characterized using only the reuse distance. It is obtained with an Integer Programming (IP) based strategy that uses channel assignments for one demand state to assign channels for the next state. Geographic locality constraints are applied to limit reassignments. The impact of cumulative interference constraints is observed to be small for small geographic localities. Second, the paper presents a new, fast DCA heuristic that is based on the characteristic channel reuse patterns used by the IP-based strategy. The heuristic and IP-based method yield similar results for the zero blocking condition. The DCA heuristic is applied to the problem of estimating the blocking probabilities of call arrivals modeled by a two state discrete-time Markov chain and uniformly distributed holding times. The blocking performance for an ensemble of spatial load imbalance distributions is uniquely characterized using the heuristic and IP solutions.

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Published In

cover image ACM SIGMOBILE Mobile Computing and Communications Review
ACM SIGMOBILE Mobile Computing and Communications Review  Volume 8, Issue 4
October 2004
78 pages
ISSN:1559-1662
EISSN:1931-1222
DOI:10.1145/1052871
Issue’s Table of Contents
Permission to make digital or hard copies of part or all 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 third-party components of this work must be honored. For all other uses, contact the Owner/Author.

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Association for Computing Machinery

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Publication History

Published: 01 October 2004
Published in SIGMOBILE Volume 8, Issue 4

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  • (2016)Pinball attacks: Exploiting channel allocation in wireless networks2016 IEEE International Conference on Communications (ICC)10.1109/ICC.2016.7510986(1-6)Online publication date: May-2016
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