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The major focus of this paper is distributed call admission control in mobile/wareless networks the purpose of which is to limit the call hand-off dropping probability an loss systems OT the cell overload probability in lossless systems. Hand-off dropping or cell overload are consequences of congestion in wireless networks. OUT call admission control algorithm takes into consideration the number of calls in adjacent cells in addition to the number of calls in the cell where a new call request is made, in order to make a call admission decision. This is done by every base station in a distributed manner without the involvement of the network call processor. The admission rule is simple enough that the admission decision can be made in real time. Furthermore, we show that OUT distributed call admission control scheme limits the hand-off dropping or the cell overload probability to a predefined level aimost independent of load conditions. This is an important requirement of future wireless/mo bile networks with quality-of-service provisioning. 0-7803-3002-1 /95 $4.00 0 1 995 IEEE

Wireless communication has become a ubiquitous part of modern life, from global cellular telephone systems to local and even personal-area networks. This 2004 book provides a tutorial introduction to digital mobile wireless networks, illustrating theoretical underpinnings with a wide range of real-world examples. The book begins with a review of propagation phenomena, and goes on to examine channel allocation, modulation techniques, multiple access schemes, and coding techniques. GSM and IS-95 systems are reviewed and 2.5G and 3G packet-switched systems are discussed in detail. Performance analysis and accessing and scheduling techniques are covered, and the book closes with a chapter on wireless LANs and personal-area networks. Many worked examples and homework exercises are provided and a solutions manual is available for instructors. The book is an ideal text for electrical engineering and computer science students taking courses in wireless communications. It will also be an invaluable reference for practising engineers.

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