Title:
SYNCHRONIZATION METHOD, MOBILE STATION DEVICE, AND BASE STATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/033928
Kind Code:
A1
Abstract:
In order to exhibit sufficient performance of a communications system using Massive-MIMO, a mobile station device is provided that controls the transmission direction of a transmission beam for synchronization signals by using beamforming using a plurality of antenna elements, and sends synchronization signals. The mobile station device is characterized by comprising: a synchronization signal processing unit (62) that generates synchronization signals including identification information for the mobile station device and changes, at prescribed time intervals, the beamforming weight for the synchronization signals; and a transmission unit (63) that sends the synchronization signals generated in accordance with each beamforming weight, by using an uplink.
Inventors:
SHEN JIYUN (JP)
SUYAMA SATOSHI (JP)
OKUMURA YUKIHIKO (JP)
SUYAMA SATOSHI (JP)
OKUMURA YUKIHIKO (JP)
Application Number:
PCT/JP2014/073068
Publication Date:
March 12, 2015
Filing Date:
September 02, 2014
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04W56/00; H04W16/28; H04W72/04
Domestic Patent References:
| WO2012149559A1 | 2012-11-01 |
Foreign References:
| JP2011514761A | 2011-05-06 | |||
| JP2013017237A | 2013-01-24 |
Other References:
"Requirements for Evolved UTRA and Evolved UTRAN", 3GPP TR 25.913
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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