| Summary: | 碩士 === 長庚大學 === 電機工程學系 === 101 === Recently, the increasing prevalence and convenience of mobile devices has been accelerating the development of mobile applications, especially multimedia streaming services, over wireless cellular networks. However, most of researches focus on the topic of improving the QoS of voice/data services. Thus, in this thesis we will design frequency planning mechanisms for supporting mobile IPTV services over wireless cellular networks. The proposed frequency planning mechanisms can support both voice/data and mobile IPTV services on 3G/4G or WiMAX mobile networks. The mechanisms are designed to provide mobile IPTV services over wireless cellular networks while preserve the quality of conventional voice/data services. A higher frequency allocation priority is assigned for voice/data services in our proposed schemes to maintain the QoS of voice/data services. Therefore, whenever the requests of voice/data services arrive and the available bandwidth is not enough, the service of the mobile IPTV channel with the least number of users must be terminated to release bandwidth for voice/data services. In addition, in order to reduce the inter-cell interference among neighboring cells, the soft frequency reuse scheme is utilized. That is, the frequency reuse pattern of 3 is employed to allocate cell-edge bands, while the frequency reuse pattern of 1 is adopted for cell-center bands. In addition to the static frequency allocation scheme mentioned above, a dynamic frequency allocation mechanism that can coordinate the frequency allocation among cell-edge bands of neighboring cells for load balancing is proposed. Numerical results will demonstrate that our proposed frequency planning mechanisms can really improve the performance of mobile IPTV services without compromising the quality of voice/data services, as compared with conventional unicast or broadcast IPTV services.
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