Communication apparatus, communication method, and non-transitory computer-readable storage medium

• US 10,244,576 B2
• Filed: 10/06/2016
• Issued: 03/26/2019
• Est. Priority Date: 10/07/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Nakagawa, Toshiyuki
• Primary Examiner(s): Solinsky, Peter G
• Application Number:
  US15/286,939
• Publication Number:
  US 20170105242A1
• Time in Patent Office: 901 Days
• Field of Search: 370329
• CPC Class Codes: H04L 25/08 Modifications for reducing interference; Modifications for reducing effects due to line faults ; Receiver end arrangements for detecting or overcoming line faults
• CPC Class Codes: H04L 67/142 Managing session states for stateless protocols; Signalling session states; State transitions; Keeping-state mechanisms
• CPC Class Codes: H04L 69/326 in the transport layer [OSI layer 4] H04L69/16 takes precedence
• CPC Class Codes: H04W 76/25 Maintenance of established connections
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A communication apparatus establishes a communication session with another communication apparatus in a predetermined wireless channel; a determination unit configured to determine a detection of an interference radio wave in the predetermined wireless channel; and a transmission unit configured to, if the communication session is established by the establishment unit, transmit at a predetermined interval a signal for maintaining the communication session, wherein the transmission unit, in response to the detection of the interference radio wave in the predetermined wireless channel being determined by the determination unit, transmits the signal regardless of the predetermined interval.

Claims

1. A communication apparatus, comprising:

at least one memory storing instructions; and

at least one processor that, upon execution of the instructions stored in the at least one memory, causes the communication apparatus to;

establish a communication session with another communication apparatus in a predetermined wireless channel;

determine a detection of a radar wave in the predetermined wireless channel;

transmit, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

transmit the predetermined signal even before the predetermined interval comes in response to the detection of the radar wave in the predetermined wireless channel being determined so as to maintain the communication session.

2. The communication apparatus according to claim 1, wherein the communication apparatus detects the radar wave in the predetermined wireless channel, and performs the determination based on the detection of the radar wave.

3. The communication apparatus according to claim 2, wherein the communication apparatus notifies the other communication apparatus that the radar wave is detected.

4. The communication apparatus according to claim 1, wherein the communication apparatus:

receives in the predetermined wireless channel from the other communication apparatus a notification indicating that the radar wave is detected, and

performs the determination based on the notification received from the other communication apparatus.

5. The communication apparatus according to claim 1, wherein the communication apparatus sets a wireless channel in which the communication apparatus performs communication with the other communication apparatus, and

wherein in a case where the detection of the radar wave in the set wireless channel is determined, the communication apparatus switches the wireless channel in which communication is performed with the other communication apparatus to another wireless channel.

6. The communication apparatus according to claim 5, wherein the predetermined interval is longer than a period required for the communication apparatus to switch to the other wireless channel.

7. The communication apparatus according to claim 1, wherein the communication session is a transport layer communication session.

8. The communication apparatus according to claim 1, wherein the communication session is a communication session for transmitting/receiving video data.

9. A communication apparatus, comprising:

at least one memory storing instructions; and

at least one processor that, upon execution of the instructions stored in the at least one memory, causes the communication apparatus to;

establish a communication session with another communication apparatus in a predetermined wireless channel;

determine a detection of a radar wave in the predetermined wireless channel;

receive, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

maintain the communication session even if the communication apparatus does not receive the predetermined signal at the predetermined interval based on the detection of the radar wave in the predetermined wireless channel being determined, in a case where the communication session is established and the detection of the radar wave in the predetermined wireless channel is determined.

10. The communication apparatus according to claim 9, wherein the communication apparatus

detects the radar wave in the predetermined wireless channel, and

performs the determination based on the detection of the radar wave.

11. The communication apparatus according to claim 10, wherein the communication apparatus notifies the other communication apparatus that the radar wave is detected.

12. The communication apparatus according to claim 9, wherein the communication apparatus:

receives a notification indicating that the radar wave is detected in the predetermined wireless channel from the other communication apparatus, and

performs the determination based on the notification received from the other communication apparatus.

13. The communication apparatus according to claim 9, wherein the communication apparatus sets a wireless channel in which the communication apparatus performs communication with the other communication apparatus, and

wherein in a case where the detection of the radar wave in the set wireless channel is determined, the communication apparatus switches the wireless channel in which communication is performed with the other communication apparatus to another wireless channel.

14. The communication apparatus according to claim 13, wherein the predetermined interval is longer than a period required for the communication apparatus to switch to the other wireless channel.

15. The communication apparatus according to claim 9, wherein the communication session is a transport layer communication session.

16. The communication apparatus according to claim 9, wherein the communication session is a communication session for transmitting/receiving video data.

17. A communication method comprising:

establishing a communication session in a predetermined wireless channel;

determining a detection of a radar wave in the predetermined wireless channel;

transmitting, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

transmitting the predetermined signal even before the predetermined interval comes in response to detection of the radar wave in the predetermined wireless channel being determined so as to maintain the communication session.

18. A communication method comprising:

establishing a communication session in a predetermined wireless channel;

determining a detection of a radar wave in the predetermined wireless channel;

receiving, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

maintaining, in a case where the communication session is established and detection of the radar wave in the predetermined wireless channel is determined, the communication session even if a communication apparatus does not receive the predetermined signal at the predetermined interval based on the detection of the radar wave in the predetermined wireless channel being determined.

19. A non-transitory computer-readable storage medium storing a computer program for controlling a computer to execute a communication method, the method comprising:

establishing a communication session in a predetermined wireless channel;

determining a detection of a radar wave in the predetermined wireless channel;

transmitting, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

transmitting the predetermined signal even before the predetermined interval comes in response to detection of the radar wave in the predetermined wireless channel being determined so as to maintain the communication session.

20. A non-transitory computer-readable storage medium storing a computer program for controlling a computer to execute a communication method, the method comprising:

establishing a communication session in a predetermined wireless channel;

determining a detection of a radar wave in the predetermined wireless channel;

receiving, in a case where the communication session is established, a predetermined signal for maintaining the communication session at a predetermined interval; and

maintaining, in a case where the communication session is established and detection of the radar wave in the predetermined wireless channel is determined, the communication session even if a communication apparatus does not receive the predetermined signal at the predetermined interval based on the detection of the radar wave in the predetermined wireless channel being determined.