Radio base station, radio communication system and radio communication method

Patent metadata

Field	Value
Publication number	US-2016205667-A1
Application number	US-201414916670-A
Country	US
Kind code	A1
Filing date	Sep 2, 2014
Priority date	Sep 6, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present invention is designed so that a radio base station controls base station parameters dynamically, in accordance with changes in the surrounding propagation environment. The radio base station according to the present invention has a surrounding environment information acquiring section that acquires surrounding environment information, which is information about the environment in a service area, a propagation environment information extraction section that extracts propagation environment information, which is information about electric wave propagation, based on the surrounding environment information, and a base station parameter generating section that generates base station parameters, which are information about the control of electric waves to transmit and receive, based on the propagation environment information.

First claim

1 . A radio base station comprising:
a surrounding environment information acquiring section that acquires surrounding environment information, which is information about environment in a service area; a propagation environment information extraction section that extracts propagation environment information, which is information about electric wave propagation, based on the surrounding environment information; and a base station parameter generating section that generates base station parameters, which are information about control of electric waves to transmit and receive, based on the propagation environment information.

2 . The radio base station according to claim 1 , wherein the base station parameter generating section estimates a propagation path by using the propagation environment information, and generates base station parameters that are suitable for transmitting the electric waves.

3 . The radio base station according to claim 1 , wherein:
the surrounding environment information acquiring section acquires a still image and/or a moving image of the surrounding environment; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on the still image and/or the moving image acquired.

4 . The radio base station according to claim 1 , further comprising a plurality of antenna elements,
wherein the surrounding environment information acquiring section transmits a beam, which is formed by using a given antenna element among the plurality of antenna elements, and receives a reflected wave of the beam by using at least one antenna element that is different from or the same as the given antenna element among the plurality of antenna elements; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on the reflected wave that is acquired.

5 . The radio base station according to claim 1 , further comprising a laser range scan sensor, wherein:
the surrounding environment information acquiring section executes laser scan with the laser range scan sensor; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on a result of the laser scan.

6 . The radio base station according to claim 1 , further comprising a database that stores at least one of the surrounding environment information, the propagation environment information and the base station parameters,
wherein, when there is information in the database that is the same as or similar to information that is acquired, the propagation environment information and the base station parameters are acquired from the database based on the same or similar information, instead of extracting the propagation environment information and generating parameters based on the information that is acquired.

7 . The radio base station according to claim 1 , further comprising a data acquisition control section that controls operation timings of the surrounding environment information acquiring section, the propagation environment information extraction section and the base station parameter generating section,
wherein the data acquisition control section makes an interval for acquiring data long with respect to an object that is located semi-statically, and makes the interval for acquiring data short with respect to an object that is located dynamically.

8 . The radio base station according to claim 1 , wherein the propagation environment information is acquired by using information about a geographic location or surrounding environment that is fed back from the user terminal.

9 . A radio communication system comprising:
a radio base station that acquires surrounding environment information, which is information about environment in a service area; a propagation environment information extraction section that extracts propagation environment information, which is information about electric wave propagation, based on the surrounding environment information acquired in the radio base station; and a base station parameter generating section that generates base station parameters, which are information about control of electric waves to transmit and receive, based on the propagation environment information.

10 . A radio communication method for a radio base station and a user terminal, comprising, in the radio base station, the steps of:
acquiring surrounding environment information, which is information about environment in a service area; extracting propagation environment information, which is information about electric wave propagation, based on the surrounding environment information; and generating base station parameters, which are information about control of electric waves to transmit and receive, based on the propagation environment information.

11 . The radio base station according to claim 2 , wherein:
the surrounding environment information acquiring section acquires a still image and/or a moving image of the surrounding environment; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on the still image and/or the moving image acquired.

12 . The radio base station according to claim 2 , further comprising a plurality of antenna elements,
wherein the surrounding environment information acquiring section transmits a beam, which is formed by using a given antenna element among the plurality of antenna elements, and receives a reflected wave of the beam by using at least one antenna element that is different from or the same as the given antenna element among the plurality of antenna elements; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on the reflected wave that is acquired.

13 . The radio base station according to claim 2 , further comprising a laser range scan sensor, wherein:
the surrounding environment information acquiring section executes laser scan with the laser range scan sensor; and the propagation environment information extraction section extracts the propagation environment information of a surrounding object based on a result of the laser scan.

14 . The radio base station according to claim 2 , further comprising a database that stores at least one of the surrounding environment information, the propagation environment information and the base station parameters,
wherein, when there is information in the database that is the same as or similar to information that is acquired, the propagation environment information and the base station parameters are acquired from the database based on the same or similar information, instead of extracting the propagation environment information and generating parameters based on the information that is acquired.

15 . The radio base station according to claim 2 , further comprising a data acquisition control section that controls operation timings of the surrounding environment information acquiring section, the propagation environment information extraction section and the base station parameter generating section,
wherein the data acquisition control section makes an interval for acquiring data long with respect to an object that is located semi-statically, and makes the interval for acquiring data short with respect to an object that is located dynamically.

16 . The radio base station according to claim 2 , wherein the propagatio

Assignees

• Ntt Docomo Inc

Inventors

• Shen Jiyun
• Suyama Satoshi
• Okumura Yukihiko
• Imai Tetsuro

Classifications

• H04B17/309

  Measuring or estimating channel quality parameters · CPC title

• H04B17/30

  of propagation channels · CPC title

• H04W72/04 Primary

  Wireless resource allocation · CPC title

• H04W88/08

  Access point devices · CPC title

• H04B17/391

  Modelling the propagation channel · CPC title