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:
Mar. 20, 2018
Filed:
Feb. 19, 2015
Ntt Docomo, Inc., Tokyo, JP;
Yusuke Ohwatari, Tokyo, JP;
Kazuaki Takeda, Tokyo, JP;
Yousuke Sano, Tokyo, JP;
Yukihiko Okumura, Tokyo, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
Some OFDM symbols transmitted temporally continuously by a base station include data signals that are not orthogonal to each other and are directed to user devices. A reference signal is arranged in the OFDM symbols temporally intermittently. The base station determines, according to reception qualities at user devices, downlink data signal transmission powers for transmitting downlink data signals. The base station reduces a downlink data signal transmission power in an OFDM symbol in which the reference signal is arranged to be lower than a downlink data signal transmission power in an OFDM symbol in which the reference signal is not arranged. The base station determines a downlink reference signal transmission power to be higher than the downlink data signal transmission power of a data signal in the OFDM symbol in which the reference signal is not arranged.