Channel allocation or assignment problems havebeen studied intensively in the literature for the last 25 years.Current directions of this work appear to be in the area ofself-organizing or distributed allocation methods, and the typeof cellular arrays involved are moving toward complex mixed orhierarchical structures rather than simple arrays of macrocells ormicrocells. Channel segregation is a distributed dynamic channelallocation method, which has been shown to work well in simplearrays. Hence we investigate how transportable this approach isto mixed cellular systems. Further, we investigate the gains offeredby hybrids of channel segregation and fixed channel allocation andstudy the stability of the channel segregation approach. Resultsare given that indicate that channel segregation (or hybrids) is astable allocation method that performs very well unchanged forcertain mixed cellular layouts.
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