RRC lies in the 3rd sublayer of air interface protocol stack, the main function of which is the control and management of radio resource.

无线资源控制(RRC)子层位于空中接口协议栈的第3层，它主要完成无线资源的控制和管理功能。

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RRC lies in the 3 rd sublayer of air interface protocol stack, the main function of which is the control and management of radio resource.

无线资源控制子层位于空中接口协议栈的第3层，它主要完成无线资源的控制和管理功能。

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For requiration of this service, research of air interface protocol stack of mobile station, as a key point TETRA system, became an important direction.

为了满足这种需求，作为TETRA系统核心内容的移动台空中接口协议栈的开发就成为一个重要的研究方向。

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