|
When a mobile moves away from the base station, the
receiveddecreases. In order to maintain the quality of
communication service, thee handed off to another idle channel
on which the received power level is higher.e of limited
channels of a cellular mobile communication system, the handoff
call mightided with a channel and be forced to terminate before
completion. Forced terminationsy users to be interruptions of
service. The phenomenon is considerably more obtrusive than new-
callhould therefore be avoided as much as possible. In this
thesis, an analytical model with guard channelshandoff calls,
and with finite handoff-call queue and finite new-call queue,
is presented. In addition, in order to keep the new-call
blocking probability not too high explore the trade-off between
termination probability andng probability, another analytical
modal with new-call and handoff-call guard channels is
presented. In this thesis, we utilize the transition
characteristics of from the aspect of queue observer to replace
Mason's formula, by the complexity of calculation increases on
an exponential rate, simple iterative matrix computations.
Furthermore, we classify according to the number of calls in
progress to analyze the handoff problem. From the numerical
results, it is found that have more notable effects on system
performance than finitet new-call guard channels is suitable
for a system in which the is longer and the number of mobiles
is fewer.
|