الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Future generation wireless networks are envisioned to provide ubiquitous networking to a wide number of mobile users, promising them the ability to access the various data networks anywhere and anytime. Such networks have motivated the research into efficient management and allocation of the wireless network’s limited resources. Mobile communication systems should use limited resources in an efficient and convenient manner. One way for achieving that is to guarantee the Quality of Services (QoS) required by each user, and in the same time maximizes their revenue by maximizing the number of the users (calls) admitted to the network. Provisioning connection-level QoS in wireless cellular networks seems to be difficult due to the limited bandwidth, the highly fluctuating wireless environment and the user’s mobility. This thesis presented a new framework for an efficient call admission control and bandwidth allocation scheme, with controlled QoS degradation. The thesis also describes how such networks should adapt their available resources to satisfy the various QoS demands for each user among the networks. The proposed framework combines Control Services Degradation with Borrowing Channel Mechanisms for improving QoS provisioning in wireless networks. The desired QoS for each user is provided, channels according to the priority level of users are assigned, which is determined by users’ bandwidth request. Such mechanism may improve the bandwidth utilization and at the same time increase the reliability.