Resource control for wireless data services

The next generation of wireless networks is expected to support high bandwidth multimedia and data applications. However, challenging issues such as scarce wireless bandwidth, harsh communication environments, and limited energy source for mobile terminals still remain. In wireless communications, bandwidth and battery energy are deemed two of the most valuable resources. This dissertation addresses these issues from the perspective of resource control.;In the first part, a channel condition adaptive resource allocation technique is presented. Channel resources are assigned to the mobiles that are experiencing good channel conditions and are suspended for those mobiles that are in bad channel condition for a period of time (dormant period). We study five different resource scheduling (assignment) policies. The channel condition is characterized by a first order Markov model. Results show that the proposed control scheme outperforms the non-adaptive data transmission control scheme in terms of the power consumption and the channel resource utilization.;In the second part, we propose and study a Zone Based Resource Assignment (ZBRA) scheme for data services in mobile networks. In the ZBRA scheme, a cell is partitioned into two concentric zones; the base station assigns two different data rates to mobile terminals depending on their location. We study the ZBRA scheme by evaluating the blocking probability and the power consumption efficiency. In addition, we study the effect of mobility on the system performance. With the same blocking probability, the ZBRA scheme achieves significant conservation on battery energy over the conventional Single Rate system.;In the third part, we propose and study a Multi-Rate Resource Control (MRRC) scheme for non-real time data applications in mobile cellular networks. The MRRC scheme adapts to the dynamically changing system load by adjusting resource assignments for mobiles. We evaluate the blocking probability, the forced termination probability, and the system throughput. Furthermore, we study the effect of Handoff To Cell area Ratio (HTCR) on MRRC performance. A streamlined analytical model is introduced to evaluate the MRRC scheme for a 2-cells case. Numerical results are presented for the 2-cells case; simulation results are presented for a 10-cells case.