回落流程走到Securitymodecomplete

回落信令走到Securitymodecomplete，下面就没了

Securitymodecomplete的解析是这样的：

LTE Radio Resource Control (RRC) protocol
  Non-Access-Stratum (NAS)PDU
    0000 .... = Security header type: (0) Plain NAS message, not security protected
    .... 0111 = Protocol discriminator: (7) EPS mobility management messages
    NAS EPS Mobility Management Message Type: (0x5e) Security mode complete
    Mobile identity - IMEISV - IMEISV (3520420675105908)
      Element ID: 0x23
      Length: 9
      0011 .... :  Identity Digit 1: 3
      .... 0... = Odd/even indication: (0) Even number of identity digits
      .... .011 = Mobile Identity Type: (3) IMEISV
      BCD Digits: 3520420675105908
      1111 .... :  Filler
    Extraneous Data