服务器创建数个虚拟信道供用户登录并互相通信。

The server creates several virtual channels that people log into to communicate with each other.

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文中介绍为了在有扰信道中提供可靠数据传输服务，通信网关在应用层使用经过改良的连续ARQ协议机制实现数据重传。

In order to provide reliable data transmission service on disturbed channels, a modified Go-Back-N ARQ protocol is used to retransmit data by a communication gateway.

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无线呼叫服务系统为点对多点通信，存在信道冲突问题。

The wireless calling service system is a kind of one point to multipoint communication, which has the problem of channel collision.

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