wbl070818 发表于 2012-10-30 06:57
请问爱总,什么情况下MS回进入到GMM-DEREG状态?
与很多种情况。都在TS24008中描述。很多属于异常流程。 举个例子,MS发起的去附着流程的异常情况在TS24.008的4.7.4.1.4中描述,例如提到:“If the detach procedure is performed due to the removal of the SIM/USIM the MS shall abort the detach procedure and enter the state GMM-DEREGISTERED.” 也就是说,如果是因为MS拔SIM/USIM卡所触发的detach流程,那么MS应该终止这个去附着流程并进入到GMM-DEREGISTERED状态。 又比如后面介绍RAU流程的异常环境时,又提到:“# 9 (MS identity cannot be derived by the network);
The MS shall set the GPRS update status to GU2 NOT UPDATED (and shall store it according to subclause 4.1.3.2), enter the state GMM-DEREGISTERED, and shall delete any P-TMSI, P-TMSI signature, RAI and GPRS ciphering key sequence number. ” 也就是RAU如果收到了带有CC原因值为9的RAU Reject消息也应进入GMM-DEREG状态。 这样的场景有很多。没法一一列举。 |