| Summary: | 博士 === 國立清華大學 === 資訊工程學系 === 96 === Next generation wireless networks are expected to be all-IP networks which integrate Internet and the diverse cellular networks. In this thesis, we focus on the two critical issues in next-generation all-IP wireless networks: mobility management and energy-efficiency.
As the first step, we study the mobility management protocols and propose Reconfigurable Architecture and Mobility Platform (RAMP). The proposed RAMP allows both mobile users and network operators to negotiate and execute their desirable protocols dynamically. Results from the analytic models, network simulations, and testbed experiments then verify the performance of RAMP. Moreover, energy efficiency is also crucial to wireless networks, especially for the high-speed data transmissions in next-generation wireless systems. We evaluate and quantify the energy conservation mechanisms in 3GPP and 3GPP2. The proposed analytic models then provide a practical method to configure the proper timer lengths.
WiMAX is one of the promising standards for the next-generation wireless access networks. Based on the study of energy efficiency and mobility management, we propose the Fast Intra-Network and Cross-layer Handover (FINCH) protocol to support fast and efficient handover in the mobile WiMAX. Paging extension for FINCH also enhances the energy efficiency of the mobile WiMAX devices. Analytic and simulation results demonstrate that FINCH can reduce not only the handover latency but also the end-to-end latency for MIP. FINCH is designed for real-time services in frequent handover environment, which is important for future mobile WiMAX networks. In addition, FINCH is a generic protocol that is especially beneficial for the integration of the heterogeneous networks in next-generation wireless networks.
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