News
Highlights
Published on 24th June 2007
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Performance Modeling and Analysis of Handover
Mechanisms in Wireless Cellular Networks
Mr. Zaid Zaabanoot gave a seminar on the 4th of
June, 2007. His seminar, entitled “Performance
Modeling and Analysis Handover Mechanisms in Wireless
Cellular Networks” covered a whole study
of the subject where he presented the meaning of
the Analytical Model, and validation of the model
and a presentation of performance analysis. Handover
is when a mobile station moves across a cell boundary,
the channel in the earlier cell is released and
an idle channel is required in the target cell.
He said, “Handover failure in mobile service
is more serious than blocking a new call because
it means interruption of an ongoing conversation
or data transmission. This work develops an analytical
model for priority handover mechanisms where new
calls and handover calls are captured by two different
traffic arrival processes, respectively. The analytical
performance model is validated by simulation experiments.
Using the blocking probability of the new calls
and the drop probability for handover calls derived
from the analytical model, we investigate the optimized
number of channels assigned to handover calls with
the aim to minimize the drop probability under
given network scenarios.” He said that
one way of reducing the dropping probability of
a handover call is to reserve a fixed number of
channels exclusively for the handover calls. He
concluded that in his paper he had derived and
validated the analytical model for priority handover
mechanisms where new calls and handover calls are
captured by two different traffic arrival processes.
Also the model has then been used to optimize the number of channels assigned
to handover calls which minimize the drop probability of handover and the blocking
probability of new calls under given network scenarios.
He said, “Our future research will work on the performance analysis of
prioritized handover mechanism within multiple cells. Also we will queue the
handover arrivals to increase the QOS.”
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