Wireless Resource Management And Related Issues In Hierarchical Cellular System

future wireless communication systems trend to provide multi-services to mobile users. The dissertation studies on the problems of resource management of wireless multi-services networks, which include admission control and optimal bandwidth allocation of multi-services in one-layer cellular networks, resource management and layer selection of multiservice hierarchical wireless networks. The major achievements in the dissertation are outlined as follows.> Multimedia traffic is classified into two classes: real-time traffic and non real-time traffic. An optimal call admission control algorithm (CAC-RA) is proposed which manage call admission control (CAC) and optimize resource allocation (RA) together by adopting Markov Decision Process approach, queuing theory and formulating a nonlinear programming model. The CAC-RA scheme is employed in a multi-service CDMA communication system in which the concept of equivalent bandwidth is introduced..> a new general bidirectional call-overflow scheme for a two-tier HCS, which allows calls to overflow between the macrocells and microcells and layer selection in hierarchical architecture based on the velocity of the mobile making the calls, is considered. In order to evaluate the performance of such hierarchical systems, an layer-united microcell (macrocell) model are developed. Considering the correlation between microcell layer and macrocell layer, the models is more practical and accurate.> A hierarchical cellular network carrying multiple service classes is considered, where dynamic channel assignment is implemented. In the dynamic channel assignment scheme, the bandwidth of data streaming services can be dynamically allocated according to the current traffic loading in the system. and the different Quality of Service (QoS) requirement from diverse applications is guaranteed through dual threshold bandwidth reservation (DTBR). Two two-state Markov Modulated Poisson Process (MMPP) are developed to approximate fast users traffic and slow users traffic respectively through the concept of user-classified (fast user and slow user) analytical method.> The performance of a hierarchical cellular network carrying multiple service classes under channel sharing and channel partitioning, where dynamic channel assignment is implemented , is researched. A microcell with high-traffic density is located at the center of the host macrocell. The user-classified analytical method in which users is classified to user 0 and user 1, is developed to calculate the system performance.> Two rate allocation schemes ( Fair Rate Allocation and Proportional Fair Rate Allocation ) and layer selection solutions of the forward and reverse link for adaptive multimedia services in hierarchical cellular network are developed. Two rate allocation schemes proposed jointly adapts the transmitted power, the quality of channel assigned to each MH for receiving/transmitting its data bits, and transmitted power for a base station and MHs. Based on the two rate allocation schemes of forward and reverse link and velocity of MH, layer selection solutions of forward and reverse link in hierarchical cellular network are developed accordingly to achieve the maximum of the total throughput in Hierarchical Cellular Structures (HCS).> A Hierarchical Celluar Ad Hoc Hybrid Network (HCA) is proposed, which integrate network achitecture both Hierarchical Celluar Structures (HCS) and Mobile Ad Hoc Network (MANET). A Markov Modulated Poisson Process (MMPP) model is developed to analyze the performance of such hybrid network. The capability of the network is enhanced and traffic of cellular is balanced, thereby calls blocking probability and forced termination probability are declined.