Wireless communication apparatus, communication system, communication method, and program

• US 20060193287A1
• Filed: 02/23/2006
• Published: 08/31/2006
• Est. Priority Date: 02/28/2005
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Usui, Shinji, Tagami, Daisuke, Sekine, Kohei, Ooshima, Satoru
• Application Number:
  US11/361,557
• Publication Number:
  US 20060193287A1
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless communication apparatus able to shorten a connection time between wireless communication apparatuses, including a wireless module activated after the end of download of firmware and becoming able to communicate with another apparatus for communication and a system control unit able to download the firmware after activation, wherein the wireless module includes a memory unit able to hold storage data even when power is turned off, and the system control unit downloads the firmware into the memory unit of the wireless module when the power of the wireless module is turned on and a communication system, a wireless communication method, and a program related to the same.

Claims

1. A wireless communication apparatus comprising:

a wireless module configured to be after an end of download of firmware and ready to communicate with another apparatus for communication; and

a system control unit configured to download the firmware after activation;

wherein

the wireless module includes a memory unit configured to hold storage data even if power is turned off, and

the system control unit downloads the firmware into the memory unit of the wireless module when the power of the wireless module is turned on.

2. A wireless communication apparatus as set forth in claim 1, wherein:

the memory unit stores and holds downloaded firmware even if the power of the wireless module is turned off.

3. A wireless communication apparatus as set forth in claim 1, wherein:

the system control unit downloads compressed firmware into the memory unit; and

the wireless module has a function of decompressing the compressed firmware.

4. A wireless communication apparatus comprising:

a wireless control unit configured to perform scan processing for an access point after activation and connecting with an apparatus for communication; and

a memory unit configured to hold previously set scan information;

wherein

the wireless control unit performs the scan processing based on the scan information.

5. A wireless communication apparatus as set forth in claim 4, wherein:

if the wireless control unit detects an access point, the wireless control unit updates the scan information in the memory unit before performing processing for the connection.

6. A wireless communication apparatus as set forth in claim 4, wherein:

the wireless control unit stores scan results in the memory unit.

7. A wireless communication apparatus as set forth in claim 4, wherein:

the wireless control unit scans access points of the same channel in the scan information all together.

8. A wireless communication apparatus as set forth in claim 4, wherein:

if when the scan information includes a plurality of access points, the wireless control unit scans the plurality of access points in a preset order of priority.

9. A wireless communication apparatus as set forth in claim 4, wherein:

the wireless control unit scans only specific channels in order of priority if scan information relating to a designated access point is present in the memory unit.

10. A wireless communication apparatus as set forth in claim 8, wherein:

the wireless control unit sets the highest priority on an access point at which connection is made successfully.

11. A wireless communication apparatus as set forth in claim 9, wherein:

the wireless control unit sets the highest priority on an access point at which connection is made successfully.

12. A wireless communication apparatus capable of shifting between an activation state and a power saving state, and wirelessly communicating data frames with an apparatus for communication;

the apparatus having a stream mode performing processing corresponding to stream traffic and a burst mode performing processing corresponding to burst traffic;

the apparatus comprising;

a statistical processing unit configured to take statistics of history of time information of received data frames;

a switch unit configured to judge, based on the statistical results of the statistical processing unit, whether traffic is a stream or burst, and selectively switching, in accordance with a result of the judgment, a mode to be processed between the stream mode and the burst mode; and

a control unit configured to perform power control by switching a control mode, in accordance with the stream mode or the burst mode, which is selected by the switch unit.

13. A wireless communication apparatus as set forth in claim 12, wherein:

the apparatus further has a transmitting unit configured to send a dedicated frame; and

the control unit contorols the transmitting unit to transmit a dedicated frame so as to notify a state of power control if shifting is made between the activation state and the power saving state.

14. A wireless communication apparatus as set forth in claim 13, wherein:

the control unit contorols the transmitting unit to transmit a NULL frame having a zero frame size with setting of data showing the activation state if the activation state is set.

15. A wireless communication apparatus as set forth in claim 13, wherein:

the control unit contorols the transmitting unit to transmit a NULL frame having a zero frame size with setting of data showing the power saving state if the power saving state is set.

16. A wireless communication apparatus as set forth in claim 12, wherein:

in the burst traffic, the control unit waits for frames for a present period immediately after transfer of data frames while keeping activation state.

17. A wireless communication apparatus as set forth in claim 12, further comprising:

an alliance processing unit configured to operate in connection with an apparatus to be communicated with and change an interval of a beacon signal to be transmitted at the time of stream traffic.

18. A communication system capable of wirelessly communicating with one or more other wireless communication apparatuses, wherein:

each of the wireless communication apparatuses has

a wireless module, which is activated after an end of download of firmware and becomes ready to communicate with another apparatus for communication;

the wireless communication apparatus has a system control unit configured to download the firmware after the activation;

the wireless module includes a memory unit configured to hold storage data even if a power is turned off; and

the system control unit downloads the firmware into the memory unit of the wireless module if a power of the wireless module is turned on.

19. A communication system enabling communication of a plurality of wireless communication apparatuses, wherein:

each of the wireless communication apparatuses has a wireless control unit configured to scan for an access point after an activation and connecting with an apparatus for communication;

the wireless communication apparatus has a memory unit configured to hold previously set scan information; and

the wireless control unit performs the scan processing based on the scan information.

20. A communication system as set forth in claim 19, wherein:

if the scan information includes a plurality of access points, the wireless control unit scans the plurality of access points in a preset order of priority; and

the wireless control unit scans only specific channels in order of priority if scan information relating to a designated access point is present in the memory unit.

21. A communication system as set forth in claim 20, wherein:

the wireless control unit sets the highest priority to an access point at which succeeded in connection; and

the wireless control unit sets a lower priority, if there is no access point in a channel at which succeeded in connection with a previous access point to the channel.

22. A communication system allowing communicate between a plurality of wireless communication apparatuses, wherein:

each of the wireless communication apparatuses has a stream mode performing processing corresponding to stream traffic and has a burst mode performing processing corresponding to burst traffic;

the wireless communication apparatus has a statistical processing unit configured to take statistics of history of time information of received data frames;

a switch unit configured to judge, based on statistical results of the statistical processing, whether the traffic is a stream or burst, and selectively switching, in accordance with a result of the judgment, a mode to be processed between the stream mode and the burst mode; and

a control unit configured to perform power control by switching a contorol mode, in accordance with the stream mode or the burst mode, which is selected by the switch unit.

23. A communication method in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses, the method comprising the steps of:

activating parts of the system other than a wireless module;

turning a power of the wireless module;

downloading firmware, for activating the wireless module, into a memory unit configured to hold storage data, even if the power is turned off;

activating after an end of the download of the firmware; and

communicating with an apparatus for communication after a scan operation.

24. A communication method in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses, the method comprising the steps of:

scanning an access point based on previously set scan information after activation; and

,

updating information in a memory unit before connection processing, when detecting an access point.

25. A communication method in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses;

the apparatus having a stream mode performing processing corresponding to stream traffic and a burst mode performing processing corresponding to burst traffic;

the method comprising the steps of;

taking statistics of a history of time information of received data frames;

judging, based on the statistical results, whether traffic is a stream or burst;

selectively switching, in accordance with a result of the judgment, a mode to be processed between the stream mode and the burst mode; and

controlling by switching a control mode, in accordance with the stream mode or the burst mode, which is selected.

26. A computer program written in a computer readable format to be run on a computer, the program configured to enable a processing in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses, the processing comprising the steps of:

activating parts of the system other than a wireless module;

turning a power of the wireless module;

downloading firmware, for activating the wireless module, into a memory unit configured to hold storage data, even if the power is turned off;

activating after an end of the download of the firmware; and

communicating with an apparatus for communication after a scan operation.

27. A computer program written in a computer readable format to be run on a computer, the program configured to enable a processing in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses, the processing comprising the steps of:

scanning an access point based on previously set scan information after activation; and

, updating scan information in a memory unit before connection processing, when detecting an access point.

28. A computer program written in a computer readable format to be run on a computer, the program configured to enable a processing in a wireless communication apparatus for wirelessly communicating with one or more other wireless communication apparatuses;

the apparatus having a stream mode performing processing corresponding to stream traffic and a burst mode performing processing corresponding to burst traffic;

the processing comprising the steps of;

taking statistics of history of time information of received data frames;

judging, based on the statistical results, whether traffic is a stream or burst;

selectively switching, in accordance with a result of the judgment, a mode to be processed between the stream mode and the burst mode; and

controlling by switching a control mode, in accordance with the stream mode or the burst mode, which is selected.