Description: In cellular systems, a primary goal is the reduction of
handover failures in the system. Channel allocation policies
that address this by setting aside guard channels for the
exclusive use of handover requests suffer from a lower utilization
of the scarce channel resources. We define a class
of non-reserving policies that efficiently utilize the channels.
Within this c.lass, we identify a Most Critical First policy
that is optimal with respect to handover failure probabiiity.
Moreover, this policy is shown to have the best channel
utlization in its class as well. The proofs of optimality are
accompanied by the description of a technique to realize the
policy in practice. Simulation results that demonstrate its
improvement over previous policies are presented as well.
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