COMMUNICATION APPARATUS, COMMUNICATION METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

• US 20170105242A1
• Filed: 10/06/2016
• Published: 04/13/2017
• 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
• Granted Patent: US 10,244,576 B2
• Time in Patent Office: Days
• 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:

an establishment unit configured to establish 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.

2. The communication apparatus according to claim 1,

further comprising a detection unit configured to detect the interference radio wave in the predetermined wireless channel,

wherein the determination unit performs the determination based on the detection of the interference radio wave by the detection unit.

3. The communication apparatus according to claim 2, further comprising a notification unit configured to notify the other communication apparatus that the interference radio wave was detected by the detection unit.

4. The communication apparatus according to claim 1,

further comprising a reception unit configured to receive in the predetermined wireless channel from the other communication apparatus a notification indicating that the interference radio wave was detected,

wherein the determination unit performs the determination based on the notification received by the reception unit.

5. The communication apparatus according to claim 1,

further comprising a setting unit configured to set a wireless channel in which the communication apparatus performs communication with the other communication apparatus,

wherein if the detection of the interference radio wave in the set wireless channel is determined by the determination unit, the setting unit 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 setting unit 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:

an establishment unit configured to establish 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;

a reception unit configured to, if the communication session is established by the establishment unit, receive at a predetermined interval a signal for maintaining the communication session; and

a maintaining unit configured to, if the communication session is established by the establishment unit, and the detection of the interference radio wave in the predetermined wireless channel is determined by the determination unit, maintain the communication session even if the reception unit does not receive the signal for the predetermined interval.

10. The communication apparatus according to claim 9,

further comprising a detection unit configured to detect the interference radio wave in the predetermined wireless channel,

wherein the determination unit performs the determination based on the detection of the interference radio wave by the detection unit.

11. The communication apparatus according to claim 10, further comprising a notification unit configured to notify the other communication apparatus that the interference radio wave was detected by the detection unit.

12. The communication apparatus according to claim 9,

further comprising a reception unit configured to receive a notification indicating that the interference radio wave was detected in the predetermined wireless channel from the other communication apparatus,

wherein the determination unit performs the determination based on the notification received by the reception unit.

13. The communication apparatus according to claim 9,

further comprising a setting unit configured to set a wireless channel in which the communication apparatus performs communication with the other communication apparatus,

wherein if the detection of the interference radio wave in the set wireless channel is determined by the determination unit, the setting unit 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 setting unit 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 an interference radio wave in the predetermined wireless channel;

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

in response to detection of an interference radio wave being determined in the predetermined wireless channel, transmitting the signal regardless of the predetermined interval.

18. A communication method comprising:

establishing a communication session in a predetermined wireless channel;

determining a detection of an interference radio wave in the predetermined wireless channel;

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

if the communication session is established, and detection of the interference radio wave in the predetermined wireless channel is determined, maintaining the communication session even if the signal for the predetermined interval is not received.

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 an interference radio wave in the predetermined wireless channel;

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

in response to detection of an interference radio wave being determined in the predetermined wireless channel, transmitting the signal regardless of the predetermined interval.

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 an interference radio wave in the predetermined wireless channel;

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

if the communication session is established, and detection of the interference radio wave in the predetermined wireless channel is determined, maintaining the communication session even if the signal for the predetermined interval is not received.