| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce a processing load of a packet switching center device and a serving gateway device by reducing an amount of signal transmitted and received between the packet switching center device and the serving gateway device when multiple PDN connections are disconnected. <P>SOLUTION: In a method for requesting a change of PDN connection set from an S-GW 15 as an origin to a UE, a request is made from an SGSN 22 of an area where the UE stays in a mobile communication system employing a second communication scheme to the S-GW 15 of an area where the UE stayed in a mobile communication system employing a first communication scheme. The SGSN 22 sends the S-GW 15 a change signal allowing setting PDN connection information subject to be changed and PDN connection information subject to be disconnected and a timer activation request for PDN connection disconnection, and the S-GW 15 activates a timer in response to the timer activation request, and disconnects the PDN connection subject to be disconnected based on the PDN connection information subject to be disconnected set in the change signal when the timer expires. <P>COPYRIGHT: (C)2012,JPO&INPIT |
