The wireless calling service system is a kind of one point to multipoint communication, 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.

因此，本课程讲述了CSCW的群组通信原理，讨论点对多点和多点对多点通信模型下的路由问题、可靠传输问题和安全问题。

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