University of Khartoum

Performance of Channel Assignment Strategies in Multi-Service Wireless Network

Performance of Channel Assignment Strategies in Multi-Service Wireless Network

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Title: Performance of Channel Assignment Strategies in Multi-Service Wireless Network
Author: Mohammed, Maha Mutasim Madani
Abstract: Call admission control (CAC) is use to decide whether or not to admit a new call or hand off call. Call admission control strategies for multimedia traffic in wireless networks serves two types: 1- narrowband customers, who need only one BBU (Basic Bandwidth Unit)-type1-. 2-wideband customers, which need more than one BBUs -type2-. We study here only three call admission control strategies complete sharing (CS), threshold and Reserved channel (RSC) or guard channel. These three types are applied to wireless network and their performances are compared. The new call blocking probability and hand off call blocking probability are highest for complete sharing because all of new calls and hand off calls share same channel. Blocking probability of handoff calls for guard channel strategy is lower than handoff blocking probability for threshold strategy, and that is due to the reserved numbers of BBUs from the channel to handoff calls in guard channel. Guard channel and threshold strategies are take care of handoff calls. Only in the case where arrival rate of the wideband customers is higher than the arrival rate of narrowband customers the handoff blocking probability of guard channel is higher than the threshold . Mean server utilization is highest for complete sharing then reserved channel and threshold are less mean server utilization.
URI: http://khartoumspace.uofk.edu/handle/123456789/18579
Date: 2005


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