Gb接口MS在STANDBY状态下执行RAU后GMM状态是否转变为READY?

爱卫生

MS在附着后，如没有发起会话，READY TEIMER超时后会转入STANDBY状态，发起RAU后状态是否转变为READY状态？
根据规范说明：STANDBY状态下SGSN从MS接收一条LLC PDU后会发生状态迁移。
我理解RAU消息应属LLC PDU，所以RAU后，MS状态应迁移至READY状态，且此后如果马上有下行数据，应不用发起寻呼。
这样理解是否正确？
   这个，我个人觉得是正确的。RAU也属于LLC PDU。
另，RAU过程是否一定伴随有FLUSH-LL消息？
  理论上应该是。这个flush流程主要还是做流控的目的。它的触发条件楼上H大侠也提到了，只要SGSN检测到了小区的变化就会发，那RAU肯定小区就变了。以下是收到BSS的ack后SGSN应采取的行为：
  On receipt of a FLUSH-LL-ACK PDU by the SGSN, indicating that the LLC-PDU(s) associated with the old BVC have been "deleted", the SGSN should update the value of the bucket counter (B) for the MS and for the old BVC, B = max (B - N, 0). N is provided by FLUSH-LL-ACK PDU, indicating the number of octets deleted by the BSS.
On receipt of a FLUSH-LL-ACK PDU by the SGSN, indicating that the LLC-PDU(s) associated with the old BVC have been "transferred" within the NSE, the SGSN should update the value of the bucket counter (B) for the old BVC, B = max (B - N, 0). The value of B for the new BVC should also be updated, B = min (B + N, Bmax). N is provided by FLUSH-LL-ACK PDU, indicating the number of octets transferred by the BSS.
FLUSH-LL消息是否只在READY状态下才会出现？
  FLUSH-LL消息属于BSSGP层，理论上和用户MM状态无关。但实际上因为做RAU的时候，ready timer还不回那么快超时并且现网ready timer普遍偏大，所以应该是在ready状态下出现。