Radio communication device for avoiding frequency collision among different radio control schemes

• US 20020142779A1
• Filed: 03/29/2002
• Published: 10/03/2002
• Est. Priority Date: 03/29/2001
• Status: Active Grant

• Current Assignee: Kioxia Corporation
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Takagi, Masahiro, Inoue, Atsushi, Goto, Masataka, Esaka, Naoki
• Granted Patent: US 7,085,535 B2
• Time in Patent Office: Days
• US Class Current: 455/450
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/542 using measured or perceived quality

Abstract

A radio communication device is provided with a unit for acquiring a prediction information for a frequency, time or direction to be used by each one of the first radio control scheme of the radio communication device and a second radio control scheme of another surrounding radio communication device, and a unit for obtaining a predicted frequency, time or direction for which interferences between radio communications by the first radio control scheme and radio communications by the second radio control scheme are predicted to occur according to the prediction information, and control the radio communication unit to carry out radio communications by avoiding the predicted frequency, time or direction.

Claims

1. A radio communication device, comprising:

a radio communication unit configured to carry out radio communications by a first radio control scheme;

an acquisition unit configured to acquire a prediction information for at least one of a frequency, a time and a direction to be used by each one of the first radio control scheme of the radio communication device and a second radio control scheme of another radio communication device located within a communication possible range of the radio communication device; and

a collision avoiding unit configured to obtain a predicted frequency, a predicted time or a predicted direction for which interferences between radio communications by the first radio control scheme and radio communications by the second radio control scheme are predicted to occur according to the prediction information, and control the radio communication unit to carry out radio communications by avoiding the predicted frequency, the predicted time or the predicted direction.

2. The radio communication device of claim 1, wherein the acquisition unit acquires the predicted information for the first radio control scheme according to prescribed basic information specifying operations of the first radio control scheme.

3. The radio communication device of claim 2, wherein the prescribed basic information includes a timestamp, a hopping rate, a hopping set, a hopping pattern, and a hopping index when the first radio control scheme is a frequency hopping scheme.

4. The radio communication device of claim 2, wherein the prescribed basic information includes a channel number when the first radio control scheme is a spectrum direct spreading scheme.

5. The radio communication device of claim 2, wherein the prescribed basic information includes a master clock offset and a master Bluetooth address when the first radio control scheme is Bluetooth.

6. The radio communication device of claim 1, wherein the acquisition unit acquires the predicted information for the second radio control scheme according to prescribed basic information specifying operations of the second radio control scheme that is received from the another radio communication device.

7. The radio communication device of claim 6, wherein the prescribed basic information includes a timestamp, a hopping rate, a hopping set, a hopping pattern, and a hopping index when the second radio control scheme is a frequency hopping scheme.

8. The radio communication device of claim 6, wherein the prescribed basic information includes a channel number when the second radio control scheme is a spectrum direct spreading scheme

9. The radio communication device of claim 6, wherein the prescribed basic information includes a master clock offset and a master Bluetooth address when the second radio control scheme is Bluetooth.

10. The radio communication device of claim 1, wherein the radio communication unit is also configured to exchange the predicted information for the first radio control scheme acquired by the radio communication device, with the another radio communication device.

11. The radio communication device of claim 1, wherein the radio communication unit is also configured to exchange the prediction information for the second radio control scheme acquired by the another radio communication device, with the another radio communication device.

12. The radio communication device of claim 1, wherein the collision avoiding unit controls the radio communication unit to delay a transmission of frames to be transmitted by the radio communication unit.

13. The radio communication device of claim 1, wherein the collision avoiding unit controls the radio communication unit to shorten a frame length of frames to be transmitted by the radio communication unit.

14. The radio communication device of claim 1, wherein the collision avoiding unit controls the radio communication unit to transmit prescribed data for commanding a control to interrupt data transmission for a prescribed period of time to any other radio communication device using the first radio control scheme, before the predicted time.

15. The radio communication device of claim 1, wherein the collision avoiding unit controls the radio communication unit to temporarily change a modulation scheme from a normally used modulation scheme to a modulation scheme with higher interference tolerance at the predicted time.

16. A radio communication control method for a radio communication device having a radio communication unit configured to carry out radio communications by a first radio control scheme, the method comprising:

acquiring a prediction information for at least one of a frequency, a time and a direction to be used by each one of the first radio control scheme of the radio communication device and a second radio control scheme of another radio communication device located within a communication possible range of the radio communication device;

obtaining a predicted frequency, a predicted time or a predicted direction for which interferences between radio communications by the first radio control scheme and radio communications by the second radio control scheme are predicted to occur according to the prediction information; and

controlling the radio communication unit to carry out radio communications by avoiding the predicted frequency, the predicted time or the predicted direction.

17. A computer program product for causing a computer to function as a radio communication device having a radio communication unit configured to carry out radio communications by a first radio control scheme, the computer program product comprising:

a first computer program code for causing the computer to acquire a prediction information for at least one of a frequency, a time and a direction to be used by each one of the first radio control scheme of the radio communication device and a second radio control scheme of another radio communication device located within a communication possible range of the radio communication device;

a second computer program code for causing the computer to obtain a predicted frequency, a predicted time or a predicted direction for which interferences between radio communications by the first radio control scheme and radio communications by the second radio control scheme are predicted to occur according to the prediction information; and

a third computer program code for causing the computer to control the radio communication unit to carry out radio communications by avoiding the predicted frequency, the predicted time or the predicted direction.