Radio communication method, system and a terminal station

• US 20060192708A1
• Filed: 02/02/2006
• Published: 08/31/2006
• Est. Priority Date: 02/04/2005
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Tandai, Tomoya, Takeda, Daisuke, Adachi, Tomoko, Utsunomiya, Yoriko, Ogura, Koji, Sato, Kazumi
• Granted Patent: US 7,940,869 B2
• Time in Patent Office: Days
• US Class Current: 342/57
• CPC Class Codes: G01S 7/021 Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals

Abstract

Radio communication system includes terminal including unit detecting radar wave transmitted through second-frequency channel, first-and-second-frequency channels through which radar wave fails to be transmitted being simultaneously utilized or one of first-and-second-frequency channels being utilized, unit generating radar-detection information including information indicating detection time when detecting unit detects radar wave, and information indicating frequency channel through which radar wave is transmitted, and unit transmitting radar-detection information, and base station including unit receiving radar-detection information, unit generating radar-occurrence information based on received-radar-detection information, radar-occurrence information including information indicating occurrence time when radar wave occurs, information indicating period of occurrence of radar wave, and information indicating frequency channel through which radar wave is transmitted, and unit transmitting radar-occurrence information, terminal further including unit receiving radar-occurrence information, and unit communicating with other terminals through second-frequency channel without using base station when radar wave fails to occur, based on received-radar-occurrence information.

Claims

1. A radio communication system comprising:

a terminal station including;

a detection unit configured to detect a radar wave transmitted through a second frequency channel, a first frequency channel and the second frequency channel through which the radar wave fails to be transmitted being simultaneously utilized or one of the first frequency channel and the second frequency channel being utilized;

a detection information generation unit configured to generate radar detection information including information indicating a detection time when the detection unit detects the radar wave, and information indicating the frequency channel through which the radar wave is transmitted; and

a detection information transmission unit configured to transmit the radar detection information; and

a base station including;

a detection information receiving unit configured to receive the radar detection information;

an occurrence information generation unit configured to generate radar occurrence information based on the received radar detection information, the radar occurrence information including information indicating an occurrence time when the radar wave occurs, information indicating a period of occurrence of the radar wave, and information indicating the frequency channel through which the radar wave is transmitted; and

an occurrence information transmission unit configured to transmit the radar occurrence information,

the terminal station further including;

an occurrence information receiving unit configured to receive the radar occurrence information; and

a communication unit configured to communicate with other terminal stations through the second frequency channel without using the base station when the radar wave fails to occur, based on the received radar occurrence information.

2. The system according to claim 1, wherein the occurrence information generation unit generates the radar occurrence information based on the radar detection information from the terminal station.

3. The system according to claim 1, wherein the detection information transmission unit transmits the radar detection information by using a frame dedicated to the radar detection information, or by connecting the radar detection information to another frame.

4. The system according to claim 1, wherein the detection information transmission unit transmits the radar detection information simultaneously using the first frequency channel and the second frequency channel, or using the first frequency channel.

5. The system according to claim 1, wherein the detection information generation unit generates the radar detection information including a plurality of radar detection information elements each including information indicating a detection time when the detection unit detects a radar wave, and information indicating the frequency channel in which the radar wave occurs.

6. The system according to claim 1, wherein the detection information generation unit generates the radar detection information including a plurality of radar detection information elements each including at least one of information indicating a detection time when the detection unit detects a radar wave, information indicating a duration time of the radar wave, and information indicating an intensity of the radar wave.

7. The system according to claim 1, wherein the base station further includes:

a scan unit configured to scan sequentially a plurality of third frequency channels supported by the base station;

a detection unit configured to detect a radar wave in each of the third frequency channels; and

a detection information generation unit configured to generate radar detection information which includes information indicating a detection time when the detection unit detects the radar wave, and information indicating the frequency channel in which the radar wave occurs, and

wherein the occurrence information generation unit refers to the generated radar detection information to generate the radar occurrence information.

8. The system according to claim 7, wherein the base station further includes an update unit configured to update the radar occurrence information generated referring to the generated radar detection information, using the radar detection information received from the terminal station.

9. The system according to claim 1, wherein the occurrence information transmission unit transmits the radar occurrence information using a report frame periodically transmitted.

10. The system according to claim 1, wherein the occurrence information generation unit generates the radar occurrence information including a plurality of radar detection information elements each including information indicating a detection time when the detection unit detects a radar wave, and information indicating the frequency channel in which the radar wave occurs.

11. The system according to claim 1, wherein the occurrence information generation unit generates the radar occurrence information including a plurality of radar detection information elements each including at least one of information indicating a detection time when the detection unit detects a radar wave, and information indicating a duration time of the radar wave.

12. A radio communication method comprising:

detecting, in a terminal station, a radar wave transmitted through a second frequency channel, a first frequency channel and the second frequency channel through which the radar wave fails to be transmitted being simultaneously utilized or one of the first frequency channel and the second frequency channel being utilized;

generating, in the terminal station, radar detection information including information indicating a detection time when detecting the radar wave, and information indicating the frequency channel through which the radar wave is transmitted;

transmitting the radar detection information from the terminal station;

receiving the radar detection information by a base station;

generating radar occurrence information by the base station based on the received radar detection information, the radar occurrence information including information indicating an occurrence time when the radar wave occurs, information indicating a period of occurrence of the radar wave, and information indicating the first frequency channel through which the radar wave is transmitted;

transmitting the radar occurrence information from the base station;

receiving the radar occurrence information by the terminal station; and

accessing other terminal stations by the terminal station through the second frequency channel without using the base station when the radar wave fails to occur, based on the received radar occurrence information.

13. The method according to claim 12, wherein the generating the radar occurrence information includes generating the radar occurrence information based on the radar detection information from the terminal station.

14. The method according to claim 12, wherein the transmitting the radar detection information includes transmitting the radar detection information by using a frame dedicated to the radar detection information, or by connecting the radar detection information to another frame.

15. The method according to claim 12, wherein the transmitting the radar detection information includes transmitting the radar detection information simultaneously using the first frequency channels, or using another of the first frequency channels.

16. The method according to claim 12, wherein the generating the radar detection information includes generating radar detection information which includes a plurality of radar detection information elements, the radar detection information elements each including information indicating a detection time when a radar wave is detected, and information indicating the frequency channel in which the radar wave occurs.

17. The method according to claim 12, wherein the generating the radar detection information includes generating radar detection information which includes a plurality of radar detection information elements, the radar detection information elements each including at least one of information indicating a detection time when a radar wave is detected, information indicating a duration time of the radar wave, and information indicating an intensity of the radar wave.

18. The method according to claim 12, further comprising:

scanning sequentially, by the base station, a plurality of third frequency channels supported by the base station;

detecting a radar wave in each of the third frequency channels by the base station; and

generating, by the base station, radar detection information which includes information indicating a detection time when the radar wave is detected, and information indicating the frequency channel in which the radar wave occurs, and

wherein the generating the occurrence information includes generating the radar occurrence information referring to the generated radar detection information.

19. The method according to claim 18, further comprising updating, by the base station, the radar occurrence information generated referring to the generated radar detection information, using the radar detection information received from the terminal station.

20. The method according to claim 12, wherein the transmitting the radar occurrence information includes transmitting the radar occurrence information using a report frame periodically transmitted.

21. The method according to claim 12, wherein the generating the radar occurrence information includes generating radar occurrence information which includes a plurality of radar detection information elements, the radar detection information elements each including information indicating a detection time when a radar wave is detected, and information indicating the frequency channel in which the radar wave occurs.

22. The method according to claim 12, wherein the generating the radar occurrence information includes generating radar occurrence information which includes a plurality of radar detection information elements, the radar detection information elements each including at least one of information indicating a detection time when a radar wave is detected, and information indicating a duration time of the radar wave.

23. A terminal station comprising:

a detection unit configured to detect a radar wave transmitted through a second frequency channel, a first frequency channel and the second frequency channel through which the radar wave fails to be transmitted being simultaneously utilized or one of the first frequency channel and the second frequency channel being utilized;

a detection information generation unit configured to generate radar detection information including information indicating a detection time when the detection unit detects the radar wave, and information indicating the frequency channel through which the radar wave is transmitted;

a detection information transmission unit configured to transmit the radar detection information;

an occurrence information receiving unit configured to receive a radar occurrence information transmitted from a base station, which is adaptable to the receiving unit, the radar occurrence information being including information indicating an occurrence time when the radar wave occurs, information indicating a period of occurrence of the radar wave, and information indicating the frequency channel through which the radar wave is transmitted; and

a communication unit configured to communicate with other terminal stations through the second frequency channel without using the base station when the radar wave fails to occur, based on the received radar occurrence information.

24. A radio communication method comprising:

detecting, in a terminal station, a radar wave transmitted through a second frequency channel, a first frequency channel and the second frequency channel through which the radar wave fails to be transmitted being simultaneously utilized or one of the first frequency channel and the second frequency channel being utilized;

generating, in the terminal station, radar detection information including information indicating a detection time when the detection unit detects the radar wave, and information indicating the frequency channel through which the radar wave is transmitted;

transmitting the radar detection information from the terminal station;

receiving a radar occurrence information transmitted from a base station, which is adaptable to the terminal station, the radar occurrence information being including information indicating an occurrence time when the radar wave occurs, information indicating a period of occurrence of the radar wave, and information indicating the frequency channel through which the radar wave is transmitted; and

communicating with other terminal stations through the second frequency channel without using the base station when the radar wave fails to occur, based on the received radar occurrence information.