Invention Grant
- Patent Title: Distance estimation method, transmission power control method, user apparatus, and base station
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Application No.: US14761756Application Date: 2014-02-04
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Publication No.: US09781584B2Publication Date: 2017-10-03
- Inventor: Satoshi Nagata , Qun Zhao , Yongbo Zeng , Yongsheng Zhang
- 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: JP2013-023393 20130208
- International Application: PCT/JP2014/052525 WO 20140204
- International Announcement: WO2014/123103 WO 20140814
- Main IPC: H04W8/00
- IPC: H04W8/00 ; H04W52/02 ; H04W24/02 ; H04W64/00 ; G01S11/06 ; H04W88/04 ; H04W88/08
Abstract:
A distance estimation method for, by causing a first user apparatus to receive a discovery signal from a second user apparatus, estimating a distance between the first user apparatus and the second user apparatus is provided. The distance estimation method includes a step of receiving from the second user apparatus the discovery signal including transmission power information of the discovery signal, a step of obtaining the transmission power information from the discovery signal, and a step of estimating the distance between the first user apparatus and the second user apparatus from receive power information of the discovery signal at the first user apparatus and the transmission power information.
Public/Granted literature
- US20150358802A1 DISTANCE ESTIMATION METHOD, TRANSMISSION POWER CONTROL METHOD, USER APPARATUS, AND BASE STATION Public/Granted day:2015-12-10
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