A STUDY ON DISTRIBUTED CONTROL DYNAMIC CHANNEL ASSIGNMENT STRATEGIES IN SECTOR CELL LAYOUT SYSTEMS

In estimating the performances of Distributed control Dynamic Channel Assignment (DDCA) strategies in sector cell layout systems, we find th at sector cell layout systems with DDCA achieved a large system capaci ty. Moreover, we also indicate the problem, which is the increase of o ccurrences of co-channel interference, raised by using DDCA in sector cell layout systems. The new channel assignment algorithm, which is ca lled Channel Searching on Direction of Sector (CSDS), is proposed to c ope with the problem. CSDS assigns nominal channels to each sector acc ording 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 bec ause it significantly improves performance on co-channel interference while only slightly decreasing system capacity.