Wireless communication device and method

Abstract

To ensure reliable communication of wireless LAN systems even in environments where other wireless communication systems with different signal formats exist. [Solution] The wireless communication device detects a frequency-hopping signal from a periodically operating frequency-hopping communication system, predicts a first interference timing that interferes with the frequency-hopping signal from the signal detection timing when the frequency-hopping signal is detected, and transmits a frame while avoiding the first interference timing. This technology can be applied to wireless communication systems.

Claims

1. A detection unit that detects frequency hopping signals from a periodically operating frequency hopping communication system, A communication control unit predicts a first interference timing that interferes with the frequency hopping signal from the signal detection timing at which the frequency hopping signal is detected, A transmitting unit that transmits a frame while avoiding the first interference timing, and A wireless communication device equipped with the following features.

2. The communication control unit performs control to include the information regarding the first interference timing in the frame and transmit it to another wireless communication device. The wireless communication device according to claim 1.

3. The communication control unit performs control to construct the frame so as to insert a silent period at the first interference timing. The wireless communication device according to claim 1.

4. The communication control unit performs control to reduce the transmission power and temporarily suspend the transmission of the frame during the silent period. The wireless communication device according to claim 3.

5. The communication control unit includes information in the frame header information indicating that the frame contains the silent period. The wireless communication device according to claim 3.

6. The communication control unit performs control to construct the frame such that the first interference timing coincides with the boundary of a MAC layer protocol data unit (MPDU). The wireless communication device according to claim 1.

7. The communication control unit performs control to configure the frames as an aggregated MAC layer protocol data unit (A-MPDU). The wireless communication device according to claim 1.

8. The communication control unit includes the information regarding the first interference timing in the delimiter portion of the A-MPDU. The wireless communication device according to claim 7.

9. The communication control unit calculates the first interference timing based on the offset information of the signal detection timing, the information on the duration of the frequency hopping signal, and the information on the period in which the frequency hopping signal was detected. The wireless communication device according to claim 1.

10. If the information transmitted from another wireless communication device that receives the frame contains information regarding a second interference timing in which the other wireless communication device interferes with the frequency hopping signal, the communication control unit calculates the second interference timing based on the information regarding the second interference timing. The wireless communication device according to claim 1.

11. The communication control unit performs control to transmit the frame while avoiding the second interference timing. The wireless communication device according to claim 10.

12. The communication control unit performs control to retransmit the frame that needs to be retransmitted, while avoiding the second interference timing. The wireless communication device according to claim 11.

13. Wireless communication device, Detect frequency-hopping signals from a periodically operating frequency-hopping communication system. From the signal detection timing at which the frequency hopping signal is detected, a first interference timing that interferes with the frequency hopping signal is predicted. Transmitting a frame while avoiding the first interference timing. Wireless communication method.

14. A receiving unit that receives a first frame from another wireless communication device which contains information regarding coexistence with frequency-hopping signals detected from a periodically operating frequency-hopping communication system, A communication control unit performs control to transmit a second frame to the other wireless communication device, avoiding a first interference timing in which the other wireless communication device interferes with the frequency hopping signal, based on the information regarding coexistence. A wireless communication device equipped with the following features.

15. The communication control unit extracts information regarding the first interference timing from the information regarding coexistence, and performs control to transmit the second frame to the other wireless communication device based on the information regarding the first interference timing. The wireless communication device according to claim 14.

16. When the communication control unit detects data destined for the other wireless communication device, it activates the detection unit that detects the frequency hopping signal and predicts a second interference timing in which it periodically interferes with the frequency hopping signal. The wireless communication device according to claim 14.

17. The system includes a transmitting unit that transmits the second frame containing information about the second interference timing. The wireless communication device according to claim 16.

18. The communication control unit generates the second frame by adding an element containing information about the second interference timing to the ACK information. The wireless communication device according to claim 16.

19. The communication control unit records the second interference timing information if there is undelivered data among the data addressed to it. The wireless communication device according to claim 18.

20. Wireless communication device, A first frame containing information about coexistence with frequency-hopping signals detected from a periodically operating frequency-hopping communication system is received from another wireless communication device. Based on the information regarding coexistence, control is performed to transmit a second frame to the other wireless communication device while avoiding the first interference timing in which the other wireless communication device interferes with the frequency hopping signal. Wireless communication method.

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