| Summary: | 博士 === 國立中山大學 === 資訊工程研究所 === 87 === Personal communication Services provide communication services any time, any place, with anybody, and in any form. PCS aims to provide personalized voice, multimedia data (text, graphic, image, and video) communication services that can be accessed regardless of location, network, and time. However, current PCS System (2nd generation) are limited to voice and low-speed data, and roaming are almost limited to the same radio technology system. The mobile telecommunications industry is working towards a new generation of services. The next generation wireless systems have the goal of offering heterogeneous services to the users that may roam to access various geographical and network boundaries.
The rate of data transmission will be faster by several orders of magnitude, and the capacity will be much greater for the next decade. A successful implementation of a third generation mobile system will enable a user to receive a constant quality of service and coverage for voice, data, graphical, and video-based information, and independent of their access network. This means that flexible bit rate services up to 2 Mbit/s will be available on the cellular and satellite networks. It will integrate services currently available across different mobile networks and access Pico-cell, Micro-cell, and Macro-cell, and allow global roaming.
In this dissertation, we propose an architecture that enables full handset mobility to track the locations of the handsets so that incoming calls can be delivered to the target handset. We propose an analytic model to derive the mis-routing probabilities as function of the link disconnection time distribution. These equations can be used as the design guideline to select the micro-ware equipment for the wireless system.
In order to reduce the number of lost calls in the GSM system, we propose an efficient VLR identification algorithm for the HLR failure is recovery procedure, which utilizes mobile station movement information to speedup the recovery procedure. The third generation wireless communication system is a family of systems, which will support the multi-mode and multi-band services.
The software-defined radio is expected to offer a flexile and powerful solution to support these new services. We focus on the mobility and radio resource management of the future generation wireless system using the software-defined radio technology.
|
|---|
