中文摘要：

基于单频网的多小区MBMS越来越受到人们的重视，但是多小区MBMS的性能受限于单频网的拓扑结构、用户的业务分布等因素，因此如何有效地进行单频网组网是一个亟待解决的问题。提出了一种半动态组网方法，该方法根据用户的移动性和预先设定的吞吐量门限值，判断是否需要更新网络拓扑机构，以保证单频网的性能。仿真结果表明：提出的方法在吞吐量方面优于传统的静态组网方法，且其更新网络拓扑结构频率也大大低于动态组网方式。该方法操作简单，更适合于实际多播系统的应用。

英文摘要：

Multi cell MBMS based SFN plays a more important role than before. But the performance of multi cell MBMS is limited with SFN configuration, users＇ service distribution and other factors. So it is an urgent problem that how to configure SFN effectively. We have proposed a semi-dynamic configuration scheme. This scheme judges whether to renew the network based on the movement of users and the threshold set first to guarantee the SFN per- formance. Simulation results show that the semi-dynamic configuration we proposed is better than the traditional static configuration in terms of throughout, and the frequency of changing network configuration is significantly low- er than dynamic configuration. This scheme can be operated simply and be more suitable for practical MBMS system application.