MATHEMATICAL-ANALYSIS OF DYNAMIC CHANNEL SELECTION IN INDOOR MOBILE WIRELESS COMMUNICATION-SYSTEMS

Dynamic channel selection (DCS) is an algorithm for flexible resource sharing in mobile radio systems, The digital enhanced cordless telecom munications (DECT) standard implements a version of DCS based on time as well as frequency multiplexing, In this paper, mathematical models are developed to evaluate the probabilities of channel availability, d esired carrier power, and the carrier-to-interference ratio (CIR) for a constant traffic load. These results can be used to compute the call setup blocking probability. The models reported in this study are bas ed on a decentralized DCS according to the DECT standard specification s. The results show that blocking due to availability of a channel (re source blocking), not interference blocking, generally is the most imp ortant factor in overall call blocking. Furthermore, it is seen that t he resource blocking is sensitive to the implementation of the portabl e sets, Also, with homogeneous static traffic, this type of DCS can be as good as fixed channel allocation (FCA) with respect to resource bl ocking.