The wireless calling service system is a kind of one pointtomultipointcommunication, which has the problem of channel collision.
无线呼叫服务系统为点对多点通信，存在信道冲突问题。
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This course introduces the theory of group communication of CSCW. We discuss the route, reliable transfer and security problems under point-to-multipoint, multipoint-to-multipoint communication.