题目内容

5G无线协议栈的用户面包括哪些层次？

A. SDAP
B. PDCP
C. RLC
D. RRC

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5G的一个无线帧长度为__，每个无线帧由个子帧构成，每个子帧长度为，一个系统帧内的子帧编号范围为_。

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