Mobile communication method, mobile management node, and serving gateway apparatus
AssigneeNEC Corporation
InventorsKatsutoshi Nishida, Toshiyuki Tamura
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Abstract
A mobile communication method according to the present invention includes the steps of: starting, by a UE, re-attach processing for MME#2, upon receiving “Paging”; transmitting, by MME#1, “DDN Ack” including “EPS Bearer ID#1” included in “DDN” and “Cause=Re-Attach Success” (information indicating that re-attach processing is successful), to S-GW#1 specified by S-GW address #1 included in the “DDN”; and releasing, by S-GW#1, a PDN connection #1 between S-GW#1 and P-GW#1, upon receiving the “DDN Ack”, the PDN connection #1 corresponding to the “EPS Bearer ID#1” included in the “DDN Ack”.
Claims4
A mobile communication method in a mobile communication system, the method comprising:
- performing, by a mobility management node, a restart;
- maintaining, by a serving gateway (SGW), some specific bearers between said SGW and a packet data network gateway (PGW);
- sending, by said SGW, Downlink Data Notification message to said mobility management node for paging a mobile terminal (UE);
- and
- requesting, by said mobility management node, said SGW to release said maintained bearer by sending a Downlink Data Notification Acknowledge message which includes a cause that said mobile terminal has re-attached.
A mobile communication system, the system comprising:
- a serving gateway (SGW) that is configured to maintain some specific bearers between said SGW and a packet data network gateway (PGW) if a mobility management node has restarted and send a Downlink Data Notification message to said mobility management node for paging a mobile terminal (UE);
- and
- said mobility management node that is configured to request said SGW to release said maintained bearers by sending a Downlink Data Notification Acknowledge message which includes a cause that said mobile terminal has re-attached.
Dependencies are inferred from the claim text.