| 摘要 |
A mobile terminal (UE) used in a mobile communication network that includes a mobility management entity (MME) and a serving gateway (S-GW), receives paging from the MME, upon an arrival of an incoming call destined for the UE from outside of the mobile communication network, wherein the incoming call is notified to the S-GW though a specific S5/S8 bearer, which upon restarting of the MME, the S-GW maintains, while deleting other bearers, and the MME notified of the incoming call by a DDN (Downlink Data Notification) sent from the S-GW, upon detecting that an attach procedure is completed in the UE, sends back to the S-GW a DDN Acknowledge indicating a cause of an attachment of the UE, and in response to the paging, re-attaches to the mobile communication network. |
