WIRELESS COMMUNICATION METHOD, AND WIRELESS COMMUNICATION DEVICE AND SYSTEM USING THE SAME

• US 20100216480A1
• Filed: 02/01/2010
• Published: 08/26/2010
• Est. Priority Date: 02/26/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JEONG, Hae-joo, PARK, Chan-sub, LEE, June-hee
• Granted Patent: US 9,137,782 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

A wireless communication method in a cognitive radio (CR) environment, and a wireless communication device and a wireless communication system using the same are provided. A communication method includes receiving channel information indicating a channel used by an external device, searching for available channels, and performing communication through the available channel. Accordingly, interference between devices can be avoided, available channels can be found more rapidly, and wireless resources can be used more efficiently.

Claims

1. A communication method, comprising:

receiving channel information indicating a channel used by at least one external device in a frequency band assigned to the at least one external device;

searching for an available channel in a portion of the frequency band with reference to the channel information; and

performing communication through the available channel.

2. The communication method according to claim 1, wherein the searching operation comprises searching for the available channel in the portion of the frequency band not including the channel assigned to the at least one external device.

3. The communication method according to claim 1, wherein the receiving operation comprises receiving the channel information from the at least one external device through a channel which is not used by the at least one external device, in the frequency band assigned to the at least one external device.

4. The communication method according to claim 1, wherein the receiving operation comprises receiving updated channel information from the at least one external device if the channel used by the at least one external device changes.

5. The communication method according to claim 1, further comprising:

generating information on the available channel which changes over time based on the channel information,

wherein the performing communicating comprises performing communication by changing a channel in use by using the information on the available channel.

6. The communication method according to claim 5, wherein the available channel is one of a plurality of available channels, and the performing communicating by changing the channel in use comprises performing communication by changing the channel in use to one of the plurality of available channels.

7. The communication method according to claim 1, wherein the channel used by the at least one external device varies according to a region, and

the receiving comprises receiving the channel information for a current region through the Internet.

8. The communication method according to claim 1, wherein the at least one external device comprises a television (TV) or a radio.

9. A wireless communication device, comprising:

a communication unit which receives channel information indicating a channel used by at least one external device, in a frequency band assigned to the at least one external device; and

a control unit which searches for an available channel in a portion of the frequency band with reference to the channel information.

10. The wireless communication device according to claim 9, wherein the control unit searches for the available channel in the frequency band not including the channel assigned to the at least one external device.

11. The wireless communication device according to claim 9, wherein the control unit receives the channel information from the at least one external device through a channel which is not used by the at least one external device in the frequency band assigned to the at least one external device.

12. The wireless communication device according to claim 9, wherein if the channel used by the at least one external device changes, the at least one external device transmits updated channel information to the wireless communication device.

13. The wireless communication device according to claim 9, further comprising:

an available channel information generation unit which generates information on the available channel which changes over time based on the channel information,

wherein the control unit sets a channel to be used by the wireless communication device using the information on the available channel.

14. The wireless communication device according to claim 13, wherein the available channel is one of a plurality of available channels, and the control unit sets one of the plurality of available channels as the channel to be used by wireless communication device.

15. The wireless communication device according to claim 9, further comprising:

an Internet interface through which the wireless communication device accesses the Internet,

wherein the channel used by the at least one external device varies according to a region, and the control unit receives channel information for a current region through the Internet.

16. The wireless communication device according to claim 9, wherein the at least one external device comprises a television (TV) or a radio.

17. A wireless communication system, comprising:

at least one first device which generates channel information indicating a channel in use in an assigned frequency band, and transmits the channel information if a channel information transmission request is received; and

at least one second device which transmits the channel information transmission request to the at least one first device, and changes a channel to be used based on the channel information received from the at least one first device.