An aggressive dynamic channel assignment strategy for a microcellular environment

A new aggressive distributed dynamic channel assignment strategy for microcellular telephone networks is proposed. Channels are assigned in carrier groups, where carriers are acquired and released according to a carrier acquisition and release criterion. Whenever a call is in jeopardy of a forced termination, or handoff failure, the serving cell may force a cell in the surrounding neighborhood to relinquish a carrier to service the call. This aggressive strategy actually improves the arrangement of carriers throughout the network. Simulations show this strategy to decrease the probability of forced termination at the expense of a slight increase in the probability of new call blocking over most ranges of offered traffic. Improvements are shown for two different channel selection criteria: one using simple carrier orderings, and a more complex one called dynamic resource acquisition