Title:
A wireless communication method, a base transceiver station, and a radio communications system
Document Type and Number:
Japanese Patent JP6045812
Kind Code:
B2
Abstract:
The present invention is designed to shorten the time that a user terminal takes to detect the common control/reference signals while coverage of the common control/reference signals transmitted from a small base station is secured. As the radio communication method of the invention, a radio communication method is provided in which beam forming information for forming transmission beams directed from the small base station (20) to the user terminal (30) are generated based on position-related information of the user terminal (30) acquired by communication between the macro base station (10) and the user terminal (30) using a coverage carrier and position-related information of the small base station, and the small base station (20) precodes at least one of a common control signal and a reference signal that are common in a small cell (C2) based on the beam forming information and transmits the precoded signal from a plurality of transmitting antennas using a capacity carrier.
Inventors:
Benjabul Anus
Yoshihisa Kishiyama
Yoshihisa Kishiyama
Application Number:
JP2012102933A
Publication Date:
December 14, 2016
Filing Date:
April 27, 2012
Export Citation:
Assignee:
Ntt docomo, Inc.
International Classes:
H04W16/28; H04B7/10; H04J11/00; H04J99/00; H04W16/32
Domestic Patent References:
| JP2001054157A |
Foreign References:
| WO2010137917A2 |
Attorney, Agent or Firm:
Hiroyoshi Aoki
Amada Masayuki
Yoshimasa Okada
Tsutomu Mizoguchi
Amada Masayuki
Yoshimasa Okada
Tsutomu Mizoguchi