Research On Network Convergence Of Mobile Broadcast/Multicast Services

In recent years, more and more people are interested in mobile TV services. Since mobile TV services would consume huge radio resources, broadcast/multicast technology has been introduced to the mobile system. On one hand,3GPP has proposed Broadcast/Multicast services(MBMS) technology, and then proposed E-MBMS technology to enhance the capability of MBMS in the System Architecture Evolution/Long Term Evolution(SAE/LTE).On the other hand, traditional terrestrial broadcasting systems has also been evolving to support the mobile terminals, and a serious of terrestrial broadcasting standards have been proposed to support mobile TV services.Compared with the mobile system,the terrestrial broadcasting system can support mobile TV services with cheaper price, but it can not provide uplink channel to support interactive services.DVB-H (Digital Video Broadcasting for Handheld) is such a standard developed by the DVB Project for handheld devices,which is based on DVB-T standard for terrestrial reception, but has improved its capabilities in energy consumption, reliable reception and smart display sizes in the mobile environment. WLAN can provide unicast link for mobile TV services and it is one of the supplementary wireless resources for the mobile system to support data services.Thus the integeration of mobile system and terrestrial system to support mobile TV service becomes a hot topic to study in the field of network convergence research. Research on network convergence of mobile broadcast/multicast services based on MBMS/E-MBMS,DVB-H and WLAN networks is done in this thesis. This thesis gave a detailed research on converged network technology to support mobile TV services.Firstly, introduction of different standards that support mobile TV, especially standards focused on MBMS/E-MBMS and DVB-H are presented. Secondly, analysis on different technologies for network convergence with MBMS/E-MBMS, WLAN and DVB-H are given. Thirdly, converged network architecture to integrate E-MBMS,DVB-H, WLAN and other networks is introduced according to IEEE 802.21.In the end, research on converged network selection and handover decision based on Multiple Attribute Decision Making method is presented based on AHP and ITOPSIS, and results on converged network selection policies are shown. That is, for one thing, use AHP method for weight calculation of different kinds of values with concideration of the type of services and the terminal velocity.For another, use ITOPSIS method to selcect the best network from different candidate networks.Base on above results, we take a simulation in different scences and verified the effectivity and practicability for network selection and handover decision.