Mobile communication method, mobile management node, and serving gateway apparatus

Abstract

A mobile communication method in a mobile communication system according to the present invention in which when MME# 1 is restarted in a first state in which a PDN connection # 1 including one or more EPS bearers # 1 is set among a UE, an S-GW# 1, and a P-GW# 1, the first state transitions to a second state in which the PDN connection # 1 is released between the UE and the S-GW# 1 and the connection is maintained only between the S-GW# 1 and the P-GW# 1, the mobile communication method including the step of not transmitting, by the MME# 1, “ Paging” whose destination is the UE upon receiving “DDN” including IMSI of the UE after detecting that re-attach processing for the mobile station has been executed in the second state.

1 . A mobile communication method in a mobile communication system in which when a first mobile management node is restarted in a first state in which a connection including one or more bearers is set among a mobile station, a first serving gateway apparatus, and a first packet data network gateway apparatus, the first state transitions to a second state in which the connection is released between the mobile station and the first serving gateway apparatus and the connection is maintained only between the first serving gateway apparatus and the first packet data network gateway apparatus, the mobile communication method comprising:
 not transmitting, by the first mobile management node, a paging signal whose destination is the mobile station upon receiving a downlink data notification signal including identification information of the mobile station after detecting that re-attach processing for the mobile station is completed in the second state.   
     
     
         2 . The mobile communication method according to  claim 1 , further comprising:
 notifying, by the first mobile management node, the first serving gateway apparatus that the re-attaching processing for the mobile station is completed when not transmitting the paging signal whose destination is the mobile station; and   releasing, by the first serving gateway apparatus, the connection between the first serving gateway apparatus and the first packet data network gateway apparatus in response to the notification.   
     
     
         3 . A mobile management node that operates as a first mobile management node for use in a mobile communication system in which when the first mobile management node is restarted in a first state in which a connection including one or more bearers is set among a mobile station, a first serving gateway apparatus, and a first packet data network gateway apparatus, the first state transitions to a second state in which the connection is released between the mobile station and the first serving gateway apparatus and the connection is maintained only between the first serving gateway apparatus and the first packet data network gateway apparatus,
 the mobile management node being configured not to transmit a paging signal whose destination is the mobile station upon receiving a downlink data notification signal including identification information of the mobile station after detecting that re-attach processing for the mobile station is completed in the second state.   
     
     
         4 . The mobile management node according to  claim 3 , wherein the mobile management node is configured to notify the first serving gateway apparatus that the re-attach processing for the mobile station is completed when not transmitting the paging signal whose destination is the mobile station.