公开(公告)号：US20180220483A1

公开(公告)日：2018-08-02

申请号：US15747810

申请日：2016-08-04

Applicant: NEC CORPORATION

Inventor： Sadafuku HAYASHI

IPC: H04W76/15 ,  H04W36/00 ,  H04W76/30 ,  H04W16/32

CPC classification number: H04W76/15 ,  H04W16/32 ,  H04W36/0027 ,  H04W76/25 ,  H04W76/30 ,  H04W88/08 ,  H04W92/20

Abstract: An apparatus and a method which make it possible to suppress occurrence of an unnecessary operation in a case of an SCG bearer. The apparatus includes: a communication processing unit configured to communicate with a terminal apparatus over a Master Cell Group (MCG) bearer for dual connectivity of the terminal apparatus; a request unit configured to request a secondary base station, which communicates with the terminal apparatus over a Secondary Cell Group (SCG) bearer for the dual connectivity, to report activity-related information related to an activity of the terminal apparatus in an SCG of the secondary base station; and an information acquisition unit configured to acquire the activity-related information reported by the secondary base station.

公开(公告)号：US20180167909A1

公开(公告)日：2018-06-14

申请号：US15889653

申请日：2018-02-06

Applicant: NEC CORPORATION

Inventor： Masato SHINDO ,  Sadafuku HAYASHI

IPC: H04W72/00 ,  H04W76/40 ,  H04W4/06 ,  H04L12/18 ,  H04W88/12 ,  H04W92/20 ,  H04W28/16

CPC classification number: H04W72/005 ,  H04L12/189 ,  H04W4/06 ,  H04W28/16 ,  H04W76/40 ,  H04W88/12 ,  H04W92/20

Abstract: A mobile communication system according to the present invention is a mobile communication system including base stations each of which forms a cell and transmits MBMS data to a mobile station existing in the cell, and control stations each of which controls the base station connected thereto, wherein the control stations include at least a control station and a second control station that determines a frequency and timing for transmitting the MBMS data in the cell and instructs the first control station of the determined frequency and timing, and wherein each of the first and second control stations establishes time synchronization with another control station and instructs the connected base station to set the cell to the frequency determined by the second control station and transmits the MBMS data to the connected base station in accordance with the transmission timing determined by the second control station.