In the document, the procedure of RRC Connection Setup is the main object of research , some abnormal cases and the allocation of the radio resource are also analyzed.

• 文章的研究对象是RRC子层连接建立过程,即信令连接建立过程,详细分析了该过程的具体流程和可能出现的异常情况,并对资源的分配做了简要描述。