COMMUNICATION APPARATUS AND CONTROL METHOD

• US 20090311964A1
• Filed: 06/11/2009
• Published: 12/17/2009
• Est. Priority Date: 06/16/2008
• Status: Abandoned Application

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yamamoto, Tetsuya
• Application Number:
  US12/483,105
• Publication Number:
  US 20090311964A1
• Time in Patent Office: Days
• US Class Current: 455/63.300
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

A communication apparatus which performs communication under control of a base station includes a detection unit to detect a signal sent from another wireless system interfering with a first frequency channel, a disconnection unit to disconnect communication performed in the first frequency channel when the signal interfering with the first frequency channel is detected, a determination unit to determine whether the base station is communicating using the first frequency channel when the communication has been disconnected, and a control unit, when it is determined that the base station is not communicating using the first frequency channel, to search for a second frequency channel used by the base station and communicate with the base station by using the second frequency channel and/or when the it is determined that the base station is communicating using the first frequency channel, to notify a user that communication has been disconnected.

Claims

1. A communication apparatus which performs communication under control of a base station, the communication apparatus comprising:

a detection unit configured to detect a signal sent from another wireless system interfering with a first frequency channel;

a disconnection unit configured to disconnect communication performed in the first frequency channel when the detection unit detects the signal interfering with the first frequency channel;

a determination unit configured to determine whether the base station is communicating using the first frequency channel when the disconnection unit has disconnected communication; and

a control unit configured, when the determination unit determines that the base station is not communicating using the first frequency channel, to search for a second frequency channel which is used by the base station and communicate with the base station by using the searched second frequency channel and/or when the determination unit determines that the base station is communicating using the first frequency channel, to notify a user that communication has been disconnected.

2. The communication apparatus according to claim 1, further comprising an interruption unit configured to interrupt transfer of data when communication is disconnected while the data is being transferred.

3. The communication apparatus according to claim 2, further comprising a restarting unit configured to restart the transfer of data which is interrupted by the interruption unit when communication is restarted by using a frequency channel different from the first frequency channel.

4. The communication apparatus according to claim 1, wherein when the determination unit determines that the base station is communicating using the first frequency channel, the determination unit repeats the determination.

10. The communication apparatus according to claim 1, further comprising a requesting unit configured to request the base station to detect a signal from the other wireless system when the detection unit detects a signal from the other wireless system.

11. The communication apparatus according to claim 1, wherein a signal from the other wireless system is a radar signal.

5. A communication apparatus which performs communication under control of a base station, the communication apparatus comprising:

a detection unit configured to detect a signal sent from another wireless system interfering with a first frequency channel;

a disconnection unit configured, when the detection unit detects the signal interfering with the first frequency channel, to disconnect communication using the first frequency channel regardless of whether the base station is communicating using the first frequency channel;

an identification unit configured, when communication has been disconnected by the disconnection unit, to identify whether the base station includes a dynamic frequency selection function; and

a control unit configured to change a process according to a result of the identification by the identification unit.

6. The communication apparatus according to claim 5, wherein if it is identified by the identification unit that the base station includes the dynamic frequency selection function, the control unit determines whether the base station has changed its channel until the base station changes its channel.

7. The communication apparatus according to claim 6, wherein if it is identified by the identification unit that the base station does not include the dynamic frequency selection function, the control unit maintains a disconnected state of communication with the base station without making the determination of whether the base station is communicating using the first frequency channel.

8. The communication apparatus according to claim 5, wherein the control unit displays information according to identification by the identification unit.

9. The communication apparatus according to claim 8, wherein if it is identified by the identification unit that the base station does not include the dynamic frequency selection function, the control unit notifies a user that communication between the communication apparatus and the base station is to be disconnected in a predetermined time period.

12. A method for controlling a communication apparatus which performs communication under control of a base station, the method comprising:

detecting a signal sent from another wireless system interfering with a first frequency channel;

disconnecting communication using the first frequency channel when the signal interfering with the first frequency channel is detected;

determining whether the base station is communicating using the first frequency channel when communication has been disconnected;

when it is determined that the base station is not communicating using the first frequency channel, searching for a second frequency channel which is used by the base station and communicating with the base station by using the searched second frequency channel; and

/or

when it is determined that the base station is communicating using the first frequency channel, notifying a user that communication has been disconnected.

13. A method for controlling a communication apparatus which performs communication under control of a base station, the method comprising:

detecting a signal sent from another wireless system interfering with a first frequency channel;

when the signal interfering with the first frequency channel is detected, disconnecting communication using the first frequency channel regardless of whether the base station is communicating using the first frequency channel;

when communication has been disconnected, identifying whether the base station includes a dynamic frequency selection function; and

changing a process according to a result of the identification.

14. A computer-readable storage medium storing a program to cause a communication apparatus which performs communication under control of a base station, to function as

a detection unit configured to detect a signal sent from another wireless system interfering with a first frequency channel;

a disconnection unit configured to disconnect communication performed in the first frequency channel when the detection unit detects the signal interfering with the first frequency channel;

a determination unit configured to determine whether the base station is communicating using the first frequency channel when the disconnection unit has disconnected communication; and

a control unit configured, when the determination unit determines that the base station is not communicating using the first frequency channel, to search for a second frequency channel which is used by the base station and communicate with the base station using the searched second frequency channel and/or when the determination unit determines that the base station is communicating using the first frequency channel, to notify a user that communication has been disconnected.

15. A computer-readable storage medium storing a program to cause a communication apparatus which performs communication under control of a base station, to function as

a detection unit configured to detect a signal sent from another wireless system interfering with a first frequency channel;

a disconnection unit configured, when the detection unit detects the signal interfering with the first frequency channel, to disconnect communication using the first frequency channel regardless of whether the base station is communicating using the first frequency channel;

an identification unit configured, when communication has been disconnected by the disconnection unit, to identify whether the base station includes a dynamic frequency selection function; and

a control unit configured to change a process according to a result of the identification by the identification unit.