Abstract
This paper illustrates a channel sub-rating allocation policy for finite population cellular system. In this policy, certain channels are permitted to tran- siently divide into two channels at half the original rate to adapt handoff calls. As a result, one half can be employed to serve the existing call and the other half to serve the handoff request so that we can get rid of forced termination of calls. We propose two system models based on fractional guard channel and sub-rating channel allocation policies with and without queueing of handoff calls which give a significant improvement in the QoS of the cellular network. New call blocking probability, handoff call forced termination probability and the degraded call quality are also investigated to examine the effects of the sub-rating on the QoS. Our policies have the least forced termination probability and the call incompletion probability when compared with the other policies.
Highlights
In wireless network, call admission control plays a significant role in providing quality of service
The proposed policy which combines fractional guard channel and sub-rating with and without queueing of handoff calls gives a significant improvement in the Quality of Service (QoS) of the cellular network
We have presented a finite population channel sub-rating policy
Summary
Call admission control plays a significant role in providing quality of service. A good channel allocation policy has to balance the handoff dropping and new call blocking in order to provide the desired Quality of Service (QoS) requirement [1,2,3,4,5]. Channel assignment policy called the sub-rating is brought in to address handoff call problem in the personnel cellular system [6]. Using the channel sub-rating, it is shown that the forced termination probability is greatly reduced with a little increase of new call blocking probability [8]. The proposed policy which combines fractional guard channel and sub-rating with and without queueing of handoff calls gives a significant improvement in the QoS of the cellular network.
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