A Study On Mbms Wireless Technology

At present, mobile communications technology in global is developing very fast, in the evolution of the second generation of digital mobile communication system to the third generation of digital mobile communications system, wcdma systerm is compatible with gsm system,so wcdma system is the first evolution selection for gsm operator.As the third generation mobile communication system, the main differences between it and the second generation of mobile communication system are the transmission of sound, the speed of data and providing a richer sound as well as the data services, it can realize free roams without the slit better in global and handle many kinds of media forms such as the processing image, music, the video streaming at a high speed, providing multiple message services including the homepage browsing, the teleconference, electronic commerce and so on.Simultaneously, it is also compatible with the second generation of mobile communication system. In practical application,it can switch with GSM communication system freedomly.The intention of this article is to guarantee provides multimedia broadcast multicast network in 3G which the richer multimedia data services can operate.MBMS supports the multimedia broadcast services and the multicast service, not only it broadcast the multimedia video informations directly to all users, but also it transmit them to a group of charge signed user for watching,and it can help the operator to develop many kinds of commercial uses such as the multimedia advertisements, wideband mobile phone, shopping online. The operator may develop the handset television service at the lower network deployement cost.This article started with the the characteristic of MBMS and the way to realizing,explained in detail the channel disposition related to MBMS, as well as the traits of the key technologies and the process of realizing, has carried on the confirmation through a group of simulated data to MBMS existence some critical questions, finally provided some reference disposition to operator.This article realized the plan through the actual simulated data to the MBMS system to carry on the confirmation, the partial data had already obtained the practical application, along with the 3G application popularization, the multimedia services will develop more and more quickly.