System architecture and channel assignment for microcellular mobile radio communications

A fixed channel assignment algorithm capable of allocating channels to variable size rectangular-shaped microcellular mobile and portable radio communications systems is presented. This geometry conforms well with the propagation conditions typical of low antenna-height base stations to be used in urban microcellular environments. Given the total number of available channels, the number of channels per channel set, blocking probability, traffic requirements of each cell, cochannel and adjacent channel separation requirements, and the number of TDMA time slots per channel for a service area of arbitrary shape and site, the algorithm allocates channel sets to each cell, calculates total capacity, and reports the number of used and unused channels and channel sets. Results of channel assignment for a 144-cell system under diversified sets of conditions are presented and the sensitivity of system capacity to the above mentioned parameters are reported