Wireless communication device and control method therefor

• US 7,577,450 B2
• Filed: 03/23/2006
• Issued: 08/18/2009
• Est. Priority Date: 03/24/2005
• Status: Active Grant

• Current Assignee: Sony Computer Entertainment Incorporated (Sony Group Corp.)
• Original Assignee: Sony Computer Entertainment Incorporated (Sony Group Corp.)
• Inventors: Miyazaki, Yoshio
• Primary Examiner(s): ZEWDU, MELESS NMN
• Application Number:
  US11/387,450
• Publication Number:
  US 20060217125A1
• Time in Patent Office: 1,244 Days
• Field of Search: 455/41.2, 455/62, 455/63.1, 455/67.11, 455/67.7, 455/68, 455/103, 455/158.1, 455/166.1, 4552261-2262, 455/434, 4554521-4522, 455/453, 455/455, 455463-464, 455509-517, 455/528, 455/1, 455/114.2, 455/188.1, 455/278.1, 455/296, 455446-451, 455/550.1, 455/556.2, 455560-561, 370/450, 370/454, 370/459, 375/150, 375/316, 375/346, 375/E1.021
• US Class Current: 455/464
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

A wireless communication device for carrying out wireless communication using any one of a plurality of channels, wherein for at least some of the plurality of channels, energy threshold values for determining whether or not a channel is busy is set for each channel. With respect to these energy threshold values, generally an energy threshold value set in at least one channel is set different to an energy threshold value set in another channel.

Claims

1. A communication apparatus, comprising:

a wireless communication device for carrying out wireless communication using one of a plurality of channels, wherein

for at least some of the plurality of channels, an energy threshold value is set for each channel in order to determine whether or not a respective channel is busy, and wherein an energy threshold value that has been set in at least one channel, in the at least some of the plurality channels is different from an energy threshold value set in other channels of the at least some of the plurality of channels; and

wherein, among selectable communication speed setting values are determined for the at least some of the plurality of channels based on the energy threshold values, and a selectable communication speed setting value, that has been determined in at least one channel, in the at least some of the plurality of channels, is different from a selectable communication speed setting value determined in other channels of the at least some of the plurality of channels.

2. The communication apparatus of claim 1, wherein the energy threshold values are set by selecting any one of a plurality of candidate energy threshold values.

3. A wireless communication device for carrying out wireless communication using one of a plurality of channels, comprising:

a diving and setting section for dividing each of said plurality of channels into a plurality of groups, and for setting energy threshold values for determining whether or not a channel is busy in each of the groups,

a selecting section for selecting a channel used in wireless communication, and

an acquiring and control section for acquiring an energy threshold value being set in a group corresponding to the selected channel, and carrying out control so that signal transmission is restricted while a signal in excess of the acquired energy threshold value is being received in the selected channel.

4. An apparatus for wireless communication, comprising:

a wireless communication device for carrying out the wireless communication selectively using one of a plurality of channels, wherein the device determines when a selected channel is not busy using one of energy threshold values, the energy threshold values are arranged as different steps in the plurality of channels, and wherein the device detects a first energy threshold value step which causes erroneous determination that a respective channel, in the plurality of channels is busy, detects a second energy threshold value step that is adjacent to the first energy threshold value step, and sets the second energy threshold value step for determining whether or not the selected channel is busy.

5. A method for carrying out wireless communication using one of a plurality of channels in a wireless communication device including a controller, comprising:

dividing by the controller each of said plurality of channels into a plurality of groups, wherein energy threshold values are set for determining whether or not a channel is busy for each of the plurality of groups,

selecting by the controller a channel used in the wireless communication, and

acquiring by the controller an energy threshold value set in a group in the plurality of groups corresponding to the selected channel, and carrying out control so that a signal transmission is restricted while a signal in excess of the acquired energy threshold value is being received in the selected channel.