Title:
MOBILE STATION, FLIGHT VEHICLE AND MOBILE COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP2020072417
Kind Code:
A
Abstract:
To suppress interference between cells of a down link and an up link between a large zone cell and a ground cell by an antenna of a mobile station between a communication relay device forming the large zone and a base station at a low altitude when the mobile station is positioned therebetween, and enable simultaneous connection to the large zone cell and the cell formed by the base station at a low altitude while enlarging frequency utilization efficiency.SOLUTION: The mobile station is used under such a state as to be positioned between a communication relay device forming a large zone cell and a base station at a low altitude, and includes a first antenna with a more upward directional beam than the horizontal direction and a second antenna with a more downward directional beam than the horizontal direction among a plurality of antennas used in the identical frequency band, and a radio communication section performing radio communication with the communication relay device of the large zone cell through the first antenna and performing radio communication with the base station at a low altitude through the second antenna by the same frequency band.SELECTED DRAWING: Figure 1
Inventors:
NAMATAME SHO
FUJII TAKASHI
FUJII TAKASHI
Application Number:
JP2018206441A
Publication Date:
May 07, 2020
Filing Date:
November 01, 2018
Export Citation:
Assignee:
SOFTBANK CORP
International Classes:
H04W88/02; H04W48/20; H04W84/06
Domestic Patent References:
| JP2018157522A | 2018-10-04 | |||
| JP2018056774A | 2018-04-05 | |||
| JP2005535201A | 2005-11-17 | |||
| JP2018093478A | 2018-06-14 | |||
| JP2017168898A | 2017-09-21 | |||
| JPH08298688A | 1996-11-12 | |||
| JP2005303858A | 2005-10-27 | |||
| JP2017120993A | 2017-07-06 |
Foreign References:
| WO2017185106A1 | 2017-10-26 | |||
| WO2014050355A1 | 2014-04-03 |
Attorney, Agent or Firm:
Toshi Kuroda
Nakamura Hiromichi
Nakamura Hiromichi