Research On E-MBMS Technology In Heterogeneous Wireless Network

With the rapid development of mobile communication technology in recent years, mobile multimedia services are more and more popular, Some Related standardization organizations have proposed corresponding specifications for more effective cellular mobile network based on multicast and broadcast services. The Multimedia Broadcast Multicast Service (MBMS) proposed by 3GPP is a service which sends data from one source to multiple users. With the continuous development of multimedia technology, MBMS can not meet the growing business needs of customers, therefore E-MBMS proposed by 3GPP is presented to enhance the downlink high-speed multimedia broadcast and multicast capability to support MBMS.Network convergence technology can greatly enhance the performance of cellular networks, not only for the traditional services but also for the new services. As is known to all,3G and WLAN heterogeneous network convergence become a hot research topic in recent years. How to take full advantages of the complementary characteristics of different networks is a great significance.This thesis introduces the concept of heterogeneous networks and MBMS and focuses on how to provide multimedia broadcast multicast services in heterogeneous network environment. It analyzes key technology of the E-MBMS and presents the existing problems in E-MBMS. To solve the problems that E-MBMS is lack of uplink feedback, a method and a process for user terminals to send feedback information to the network are proposed. Then a dynamic optimization allocation scheme based on user feedback information for MBSFN is proposed. The performance analysis shows the efficiency of the proposed MBSFN dynamic optimization scheme.