| 摘要 |
A method of performing a handover according to the invention includes a step A of causing an MME to transmit "Forward Reloc Req" to an SGSN, and a step B of causing the MME to release a PS bearer which has been used for the voice communications and the packet communications of the UE#1 in the mobile transmission network accommodating the E-UTRAN, when detecting that a handover from E-UTRAN to UTRAN/GERAN for voice communications of a UE#1 is completed after detecting that establishment of a PS bearer is refused in the SGSN.
|
