The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2014
Filed:
Dec. 27, 2010
Laeyoung Kim, Gyeonggi-Do, KR;
Hyunsook Kim, Gyeonggi-Do, KR;
Taehyeon Kim, Gyeonggi-Do, KR;
Saso Stojanovski, Paris, FR;
Arnaud Vedrine, Paris, FR;
Laeyoung Kim, Gyeonggi-Do, KR;
Hyunsook Kim, Gyeonggi-Do, KR;
Taehyeon Kim, Gyeonggi-Do, KR;
Saso Stojanovski, Paris, FR;
Arnaud Vedrine, Paris, FR;
LG Electronics Inc., Seoul, KR;
Abstract
The present invention relates to a mobile communications system, and particularly, to a method for determining whether to keep or deactivate an activated Idle mode Signaling Reduction (ISR) feature for a terminal in a mobile communications system. In case of the UE's intra-SGSN mobility and intra-MME mobility, when deciding, by a mobility management node, ISR activation for a UE in an IMS network environment where heterogeneous mobile communications networks (e.g., E-UTRAN and UTRAN/GERAN) interwork with each other, considered are not only whether the mobility management node can support an ISR feature, and whether the UE can use IMS voice, but also conditions (information) on whether each mobility management can support IMS voice over PS session. This may allow an incoming voice call to the UE from the IMS network to be delivered through a first trial, to a domain (PS domain or CS domain) selected with consideration of access network situations.