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.
网关的作用就是在应用层实现协议之间的相互转换。
A gateway is utilized to realize the protocol conversion at application level.
网关的作用就是在应用层实现协议之间的相互转换。
A gateway is utilized to realize the protocol conversion at application level.
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