MOBILE COMMUNICATION METHOD AND CALL SESSION CONTROL SERVER DEVICE

摘要

A mobile communication method according to the present invention includes the steps of: causing an MME to restart with a bearer for a UE established between an S-GW and a P-GW; causing a P/S-CSCF to transmit a terminating signal addressed to the UE to the S-GW via the P-GW; causing the S-GW to notify the P/S-CSCF via the P-GW that the MME has restarted; causing the P/S-CSCF to hold the terminating signal addressed to the UE; and causing the P/S-CSCF to transmit the terminating signal addressed to the UE to the S-GW via the P-GW after the UE is registered with an IMS again.