Invention Grant
- Patent Title: User terminal, radio base station, radio communication method, and radio communication system
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Application No.: US15107142Application Date: 2014-12-15
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Publication No.: US10560889B2Publication Date: 2020-02-11
- Inventor: Kazuki Takeda , Kazuaki Takeda , Tooru Uchino , Satoshi Nagata
- Applicant: NTT DOCOMO, INC.
- Applicant Address: JP Tokyo
- Assignee: NTT DOCOMO, INC.
- Current Assignee: NTT DOCOMO, INC.
- Current Assignee Address: JP Tokyo
- Agency: Osha Liang LLP
- Priority: JP2013-268332 20131226
- International Application: PCT/JP2014/083070 WO 20141215
- International Announcement: WO2015/098583 WO 20150702
- Main IPC: H04W48/18
- IPC: H04W48/18 ; H04L5/00 ; H04L1/00 ; H04W72/12 ; H04W76/15 ; H04W88/02 ; H04W88/08

Abstract:
A user terminal that communicates with a plurality of cell groups (CG), each group being formed with one or more cells to use different frequency bands, and a control section that selects at least one cell, from the cells where uplink control signals can be allocated, which are configured in each CG, and controls the cell to transmit the uplink control signals. When information to indicate cross-carrier scheduling (CCS) is included in a downlink control signal, the control section decides whether or not the cell having received the downlink control signal and the cell that is designated by the information to indicate CCS belong to the same CG, and selects the cell based on this decision. Thus, the decrease of overall system performance can be reduced even when CCS and uplink control signal transmission in secondary cells are employed at the same time.
Public/Granted literature
- US20170041865A1 USER TERMINAL, RADIO BASE STATION, RADIO COMMUNICATION METHOD, AND RADIO COMMUNICATION SYSTEM Public/Granted day:2017-02-09
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