Invention Grant
- Patent Title: User device, base station, communication method, and instruction method
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Application No.: US15578398Application Date: 2016-04-06
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Publication No.: US10893489B2Publication Date: 2021-01-12
- Inventor: Kei Andou , Kazuki Takeda , Tooru Uchino , Kunihiko Teshima
- Applicant: NTT DOCOMO, INC.
- Applicant Address: JP Tokyo
- Assignee: NTT DOCOMO, INC.
- Current Assignee: NTT DOCOMO, INC.
- Current Assignee Address: JP Tokyo
- Agency: Osha Bergman Watanabe & Burton LLP
- Priority: JP2015-164257 20150821
- International Application: PCT/JP2016/061319 WO 20160406
- International Announcement: WO2017/033490 WO 20170302
- Main IPC: H04W52/36
- IPC: H04W52/36 ; H04W72/04 ; H04W16/32 ; H04W52/38 ; H04W52/14 ; H04W52/34
Abstract:
A user device for a radio communication system supports uplink carrier aggregation. The user device includes a transmitter that transmits an uplink signal to a base station by using a first component carrier and a second component carrier having a TTI length shorter than a TTI length of the first component carrier, and a calculator that calculates a lower limit and an upper limit of a maximum transmission power of the uplink signal according to predetermined formulas using one of a subframe of the first component carrier and a subframe of the second component carrier as a reference subframe.
Public/Granted literature
- US20180213489A1 USER DEVICE, BASE STATION, COMMUNICATION METHOD, AND INSTRUCTION METHOD Public/Granted day:2018-07-26
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