OPTICAL SPACE COMMUNICATION DEVICE, COMMUNICATION METHOD THEREOF AND OPTICAL SPACE COMMUNICATION SYSTEM

• US 20120230701A1
• Filed: 02/08/2012
• Published: 09/13/2012
• Est. Priority Date: 03/07/2011
• Status: Abandoned Application

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: MURATA, SHIGERU, ITO, SATOAKI, KAKIMOTO, YUKITERU
• Application Number:
  US13/368,545
• Publication Number:
  US 20120230701A1
• Time in Patent Office: Days
• US Class Current: 398/140
• CPC Class Codes: H04B 10/1123 Bidirectional transmission

Abstract

A optical space communication device, including: a transmission module transmitting an optical signal to a specific opposite communication device whose position is known, a reception module receiving the optical signal transmitted from a plurality of indefinite opposite communication devices, and a central communication control device controlling the transmission module and the reception module.

Claims

1. An optical space communication device, comprising:

a transmission module transmitting an optical signal to a specific opposite communication device whose position is known,

a reception module receiving said optical signal transmitted from a plurality of indefinite opposite communication devices, and

a central communication control device controlling said transmission module and said reception module.

2. The optical space communication device according to claim 1, wherein said central communication control device calculates a direction of said opposite communication device in accordance with a position information of self device and said opposite communication device, and performs a feed-forward control of a transmission direction.

3. The optical space communication device according to claim 1, wherein a plural of said reception module are provided to receive said optical signal which conies from arbitrary direction.

4. The optical space communication device according to claim 1, wherein said optical signal transmitted from said transmission module comprises said position information of self device, and said central communication control device detects a position of said opposite communication device from said position information comprised in said optical signal of said opposite communication device received by said reception module.

9. An optical space communication system, comprising:

a plural of said optical space communication device according to claim 1;

wherein a mesh type network is configured with each optical space communication device.

10. The optical space communication system according to claim 9, wherein said central communication control device calculates a direction of said opposite communication device in accordance with a position information of self device and said opposite communication device, and performs a feed-forward control of a transmission direction.

11. The optical space communication device according to claim 1, wherein a plural of said transmission module are provided to transmit said optical signal to arbitrary direction.

12. The optical space communication device according to claim 1, wherein said reception module comprising:

a collecting lens collecting said optical signal transmitted from a plural of directions at the same time,

a photo detector detecting said optical signal focused by said collecting lens with a prescribed angle,

a readout device separating and outputting said optical signal detected by said plural of a photo detector.

13. The optical space communication device according to claim 1, wherein said transmission module comprising:

a deflection unit controlling a beam direction of said optical signal for transmission,

a spread angle control unit controlling a spread angle of a beam of said optical signal for transmission.

14. The optical space communication device according to claim 1, wherein said spread angle control unit controls said optical signal to output a narrow spread angle beam toward an opposite communication device at a long distance and to output a wide spread angle beam toward an opposite communication device at a short distance.

15. The optical space communication device according to claim 1, wherein said optical space communication device is a mobile unit.

5. A communication method of an optical space communication device, wherein said optical space communication device comprises:

a transmission module transmitting an optical signal,

a reception module receiving said optical signal, and

a central communication control device controlling said transmission module and said reception module;

wherein said central communication control device performs;

instructing said transmission module to transmit said optical signal to a specific opposite communication device whose position is known, and

instructing said reception module to receive said optical signal transmitted from a plurality of indefinite opposite communication devices.

6. The communication method according to claim 5, wherein said central communication control device calculates a direction of said opposite communication device in accordance with a position information of self device and said opposite communication device, and performs a feed-forward control of a transmission direction.

7. The communication method according to claim 5, wherein a plural of said reception module are provided to receive said optical signal which comes from arbitrary direction.

8. The communication method according to claim 5, wherein said optical signal transmitted from said transmission module comprises said position information of self device, and

said central communication control device detects a position of said opposite communication device from said position information comprised in said optical signal of said opposite communication device received by said reception module.

16. A communication method of an optical space communication device according to claim 5,

wherein said central communication control device instructs said transmission module to transmit said optical signal to a specific opposite communication device whose position is known, and instructs said reception module to receive said optical signal transmitted from a plurality of indefinite opposite communication devices, and

a plural of said transmission module are provided to transmit said optical signal to arbitrary direction.

17. A communication method of an optical space communication device according to claim 5, wherein said reception module comprising:

a collecting lens collecting said optical signal transmitted from a plural of directions at the same time,

a photo detector detecting said optical signal focused by said collecting lens with a prescribed angle,

a readout device separating and outputting said optical signal detected by said plural of a photo detector.

18. A communication method of an optical space communication device according to claim 5, wherein said transmission module comprising:

a deflection unit controlling a beam direction of said optical signal for transmission,

a spread angle control unit controlling a spread angle of a beam of said optical signal for transmission.

19. A communication method of an optical space communication device according to claim 5,

wherein said spread angle control unit controls said optical signal to output a narrow spread angle beam toward an opposite communication device at a long distance and to output a wide spread angle beam toward an opposite communication device at a short distance.

20. A communication method of an optical space communication device according to claim 5,

wherein said optical space communication device is a mobile unit.