DEVICE AND METHOD

• US 20170188293A1
• Filed: 02/05/2015
• Published: 06/29/2017
• Est. Priority Date: 04/22/2014
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: MIZUSAWA, Nishiki
• Granted Patent: US 10,292,092 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

[Object] To make it possible to start use of a frequency band used in a wireless LAN in a cellular system more quickly.

[Solution] Provided is a device including: an acquisition unit configured to acquire a result of discovery of a wireless local area network (LAN) access point that uses a frequency band; and a control unit configured to control monitoring of a radar wave in the frequency band based on the result of the discovery before use of the frequency band by a base station of a cellular system starts.

Claims

1. A device comprising:

an acquisition unit configured to acquire a result of discovery of a wireless local area network (LAN) access point that uses a frequency band; and

a control unit configured to control monitoring of a radar wave in the frequency band based on the result of the discovery before use of the frequency band by a base station of a cellular system starts.

2. The device according to claim 1,

wherein, when a wireless LAN access point that uses the frequency band is discovered, the control unit controls the monitoring in a manner that the monitoring is not performed before use of the frequency band by the base station starts.

3. The device according to claim 2,

wherein, when a wireless LAN access point that uses the frequency band is discovered, the control unit does not trigger the monitoring.

4. The device according to claim 2,

wherein, when a wireless LAN access point that uses the frequency band is discovered, the control unit starts use of the frequency band by the base station without the monitoring.

5. The device according to claim 1,

wherein, when a wireless LAN access point that uses the frequency band is not discovered, the control unit controls the monitoring in a manner that the monitoring is performed before use of the frequency band by the base station starts.

6. The device according to claim 5,

wherein, when a wireless LAN access point that uses the frequency band is discovered, the control unit triggers the monitoring.

7. The device according to claim 5,

wherein, when no radar waves are detected during the monitoring, the control unit starts use of the frequency band by the base station.

8. The device according to claim 4,

wherein the use of the frequency band by the base station is use of the frequency band according to carrier sense multiple access/collision avoidance (CSMA/CA).

9. The device according to claim 4,

wherein the use of the frequency band by the base station is use of the frequency band as a secondary component carrier of carrier aggregation.

10. The device according to claim 1,

wherein the monitoring is monitoring for a predetermined period.

11. The device according to claim 10,

wherein the monitoring is channel availability check of dynamic frequency selection (DFS).

12. The device according to claim 1, further comprising

a discovery unit configured to discover a wireless LAN access point that uses the frequency band.

13. The device according to claim 12,

wherein the discovery unit detects a frame transmitted by a wireless LAN access point and thus discovers a wireless LAN access point that uses the frequency band.

14. The device according to claim 13,

wherein the frame includes a beacon frame transmitted by a wireless LAN access point.

15. The device according to claim 13,

wherein the frame includes a probe response frame transmitted by a wireless LAN access point.

16. The device according to claim 1,

wherein the discovered wireless LAN access point is an access point that is positioned in the vicinity of the base station

17. The device according to claim 1,

wherein the frequency band is a wireless LAN channel.

18. The device according to claim 17,

wherein the channel is a channel for which DFS is requested.

19. The device according to claim 1,

wherein the device is the base station, a base station device for the base station or a module for the base station device.

20. A method comprising:

acquiring a result of discovery of a wireless LAN access point that uses a frequency band; and

controlling, by a processor, monitoring of a radar wave in the frequency band based on the result of the discovery before use of the frequency band by a base station of a cellular system starts.