从附着和PDP激活流程看Local和Foreigh TLLI的变化

Mr_Muscle

我的理解是：
当Attach Accept之后，虽然MS已经收到了新的P-TMSI，但是仍用foreign TLLI进行传递消息，直到SGSN发送下来的消息中包含了TLLI_Current和TLLI_Old，当BSS收到这个消息之后，就会通知MS下个消息开始使用Local TLLI进行通信。
也就是这句话的意思了
An SGSN provides the BSSGP with a current TLLI, identifying the MS. If an SGSN provides a second TLLI, indicating that an MS has recently changed its TLLI, this shall be considered as the "old" TLLI. A BSS uses the "old" TLLI to locate an MS's existing context. Subsequent uplink data transfers for this MS shall reference the current TLLI, and not the old TLLI.