USER EQUIPMENT AND MOBILE COMMUNICATION METHOD

WIPO Patent Application WO/2014/038598

A1

Provided are user equipment capable of, even when having made a transition from LTE to 3G by SRVCC while receiving announcement sound from the network side in response to a call request to a terminating terminal, continuing the output of the announcement sound, and a mobile communication method. UE (100A) executes continuation processing (SRVCC) of a 3G sound communication service if the connection destination of the user equipment makes a transition from LTE to 3G. Further, the UE (100A) receives announcement sound via LTE or 3G, and outputs the announcement sound after making a request to call a party at the other end and before starting to call the party. The UE (100A) outputs the announcement sound even after making the transition to 3G if the continuation processing of the sound communication service is executed during a period when the announcement sound is being outputted.

TANAKA ITSUMA (JP)
OHASHI AKI (JP)
HIMENO HIROMI (JP)
SAKURAMOTO HIDEYUKI (JP)

PCT/JP2013/073822

March 13, 2014

September 04, 2013

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NTT DOCOMO INC (JP)

H04W88/02; H04W48/18; H04W68/12

"3rd Generation Partnership Project;Technical Specification Group Services and System Aspects;IP Multimedia Subsystem (IMS) Service Continuity Stage 2(Release 12)", 3GPP TS 23.237 V12.0.0 (2012-06), 3GPP, June 2012 (2012-06-01), pages 1 - 165, XP055250894
NTT DOCOMO: "SRVCC before ringing(brSRVCC)", 3GPP SA WG2 MEETING #93 S2-124078, 12 October 2012 (2012-10-12), XP050683756
See also references of EP 2894936A4

MIYOSHI, Hidekazu et al. (JP)
Hidekazu Miyoshi (JP)

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