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在3GPP R6版本中定义的MBMS(Multimedia Broadcast Multicast Services)是指无线网络中一个数据源向多个用户发送数据的点到多点(p-t-m)业务,可以在不改变网络结构的基础上实现网络资源共享。除了共享移动核心网和接入网资源,MBMS还可以共享更为紧张的空中接口资源以提高无线资源的利用率。MBMS的优势在于不仅能实现纯文本低速率的消息类组播和广播,还能实现高速率多媒体数据业务的组播和广播。
The Multimedia Broadcast Multicast Services (MBMS), defined in the 3GPP R6 release, refers to the point-to-multipoint (ptm) service in which a data source sends data to multiple users in a wireless network and can implement network resources without changing the network structure shared. In addition to sharing mobile core network and access network resources, MBMS can also share more intense air interface resources to improve the utilization of wireless resources. The advantage of MBMS lies in the fact that it not only can realize multicast and broadcast of message text at low rate of plain text, but also multicast and broadcast of high speed multimedia data service.