الفهرس 
Introduction and aim of workOnly 14 pages are availabe for public view
 |  | from | 240 |  |  |
| | | from | 240 | | |
Abstract
This thesis presents a queuing model for the reverse link (from mobiles to base station) in a single cell ATM/CDMA network. The proposed model is based on fluid flow approximation in which the equilibrium buffer fill distribution is described by a set of differential equations assuming ATM sources alternate asynchronously between exponentially distributed periods in ?on? and ?off? states. Experiments were conducted to assess the efficiency of the proposed fluid flow model for a wireless ATM/CDMA network by comparing the analytical model with the simulation model. Results from a various simulation experiments show a good agreement with the proposed queuing model. Power control may be considered a central mechanism for resource allocation and QoS guarantee in wireless ATM/CDMA networks. In this respect this thesis proposes and examines a power control scheme based on Gaussian approximation for a wireless ATM/CDMA network, with focus on the mobile to base link. In the proposed algorithm, the total received uplink power is minimized subject to maintaining an individual outage conditions for each connection. This minimization occurs over each active connection with the base station according to its class of service. Numerical results are used to study the impact of power control on the ATM queuing model and loss performance. Although the context in which this research effort conducted was a wireless ATM/CDMA network, the proposed power control technique developed here can be applied to other infrastructure wireless systems employing DSCDMA as their airinterface.