When a voice call transmission is made from UE (100) existing in both a 3G femto area (101) and an LTE area (103), or when a voice call reception is made by the UE (100), circuit switched fall back from an MME (112) to a P-CSCF (108) is performed for the voice call transmission or the voice call reception by using a predetermined protocol.
申请公布号
WO2013183316(A1)
申请公布日期
2013.12.12
申请号
WO2013JP51045
申请日期
2013.01.21
申请人
NEC CORPORATION;MIYAGAWA, YUSUKE;KIDO, TAKAYUKI;AKIMOTO, TAKUO;NAKANISHI, YUKI;WATANABE, YASUHIRO
