A Study on Distributed Control Dynamic Channel Assignment Strategies in Sector Cell Layout Systems

Satoru FUKUMOTO  Kazunori OKADA  Duk-Kyu PARK  Shigetoshi YOSHIMOTO  Iwao SASASE  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E79-A    No.7    pp.975-982
Publication Date: 1996/07/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Multi-dimensional Mobile Informatin Network)
dynamic channel assignment,  distributed control dynamic channel assignment,  sector cell layout system,  channel searching on direction of sector,  mean number of channel changes,  

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In estimating the performances of Distributed control Dynamic Channel Assignment (DDCA) strategies in sector cell layout systems, we find that sector cell layout systems with DDCA achieved a large system capacity. Moreover, we also indicate the problem, which is the increase of occurrences of cochannel interference, raised by using DDCA in sector cell layout systems. The new channel assignment algorithm, which is called Channel Searching on Direction of Sector (CSDS), is proposed to cope with the problem. CSDS assigns nominal channels to each sector according to their direction so that the same frequency channel tends to be used in sectors having the same direction. We show, by simulations, that CSDS is an adequate algorithm for sector cell layout systems because it significantly improves performance on co-channel interference while only slightly decreasing system capacity.