Access point device and method for setting channel of the same

An access point device, comprising:

• a wireless transmission and reception unit transmitting information of the access point where the wireless transmission and reception unit is located at or receiving information of peripheral access point devices wirelessly;
• a control unit searching channel numbers used by the peripheral access point devices from the information from the wireless transmission and reception unit, deciding an optimal channel number from among the channel numbers except for the used channel numbers, and setting the optimal channel number as a designated channel number;
• the control unit, when searching channel numbers used by the peripheral access point devices, receiving beacon frames from the peripheral access point devices for a predetermined time, extracting the channel numbers from the beacon frames, and storing the extracted channel numbers;
• and
• an operator terminal managing and controlling the control unit.

An access point device, comprising:

• a wireless transmission and reception unit transmitting information of the access point where the wireless transmission and reception unit is located at or receiving information of peripheral access point devices wirelessly;
• a control unit searching channel numbers used by the peripheral access point devices from the information from the wireless transmission and reception unit, deciding an optimal channel number from among the channel numbers except for the used channel numbers, and setting the optimal channel number as a channel number;
• the control unit, when searching channel numbers used by the peripheral access point devices, receiving beacon frames from the peripheral access point devices for a predetermined time, extracting the channel numbers from the beacon frames, and storing the extracted channel numbers;
• the control unit, when determining the optimal channel number, selecting one of the channel numbers except for the used channel numbers, deciding whether the channel numbers obtained by subtracting ‘1’ and ‘2’ from the selected channel number and the channel numbers obtained by adding ‘1’ and ‘2’ to the selected channel number have been used, and setting the selected channel number as the optimal channel number when the channel numbers have not been used;
• and
• an operator terminal managing and controlling the control unit.

A method for setting a channel of an access point device, comprising:

• a peripheral search step for receiving information from peripheral access point devices, and searching channel numbers used by the peripheral access point devices;
• the peripheral search step comprising the steps of a probe request frame transmission step transmitting a probe request frame to the peripheral access point devices, a probe response frame reception step receiving probe response frames from the peripheral access point devices for a predetermined time, and a channel number extraction step extracting channel numbers from the received probe response frames and storing the extracted channel numbers;
• an optimal channel number decision step for selecting one of the channel numbers except for the used channel numbers, and deciding whether the selected channel number is an optimal channel number;
• and
• a channel setting step for setting the selected channel number as a channel number when the selected channel number is the optimal channel number.

A method for setting a channel of an access point device, comprising:

• a peripheral search step receiving information from peripheral access point devices, and searching channel numbers used by the peripheral access point devices;
• the peripheral search step comprising the steps of a beacon frame reception step receiving beacon frames transmitted from the peripheral access point devices for a predetermined time, and a channel number extraction step extracting the channel numbers from the beacon frames and storing the extracted channel numbers;
• an optimal channel number decision step selecting one of the channel numbers except for the used channel numbers, and deciding whether the selected channel number is an optimal channel number;
• and
• a channel setting step setting the selected channel number as a channel number when the selected channel number is the optimal channel number.

A method for setting a channel of an access point device, comprising:

• a peripheral search step receiving information from peripheral access point devices, and searching channel numbers used by the peripheral access point devices;
• the peripheral search step comprising the steps of a probe request frame transmission step transmitting a probe request frame to the peripheral access point devices, a probe response frame reception step receiving probe response frames from the peripheral access point devices for a predetermined time, and a channel number extraction step extracting channel numbers from the received probe response frames and storing the extracted channel numbers;
• an optimal channel number decision step selecting one of the channel numbers except for the used channel numbers, and deciding whether the selected channel number is an optimal channel number;
• the optimal channel number decision step comprising selecting one of the channel numbers except for the used channel numbers, and deciding whether the channel numbers obtained by subtracting 1 and 2 from the selected channel number and the channel numbers obtained by adding 1 and 2 to the selected channel number have been used;
• and
• a channel setting step setting the selected channel number as a designated channel number when the selected channel number is the optimal channel number.

An apparatus, comprising:

• a first unit transmitting information of the access point where the first unit is located at or receiving information of peripheral access point devices wirelessly;
• a second unit searching channel numbers used by the peripheral access point devices from the information from the first unit, deciding an optimal channel number from the channel numbers except for the used channel numbers, and setting the optimal channel number as a channel number, when searching the channel numbers, the second unit transmitting a probe request frame to the peripheral access point devices, receiving probe response frames from the peripheral access point devices for a predetermined time, and extracting the channel numbers from the received probe response frames;
• and
• a third unit managing and controlling the second unit.

An apparatus, comprising:

• a first unit transmitting information of the access point where the first unit is located at or receiving information of peripheral access point devices wirelessly;
• a second unit searching channel numbers used by the peripheral access point devices received from the first unit, the second unit receiving beacon frames from the peripheral access point devices for a predetermined time and extracting the channel numbers from the beacon frames and storing the extracted channel numbers when searching the channel numbers;
• the second unit deciding an optimal channel number from the channel numbers except for the used channel numbers, and setting the optimal channel number as a channel number;
• and
• a third unit managing and controlling the second unit.

The computer-readable storage medium encoded with computer-executable instructions for performing a method, composed of:

• transmitting a probe request frame after setting a basic service set identifiers field of the probe request frame as broadcast basic service set identifiers;
• receiving probe response frames from peripheral access point devices for a predetermined time, and searching channel numbers used by the peripheral access point devices;
• extracting channel numbers from the received probe response frames, and storing the extracted channel numbers;
• extracting the channel numbers from direct sequence parameter sets of frame bodies of the probe response frames;
• selecting one of the channel numbers except for the used channel numbers, and deciding whether the selected channel number is an optimal channel number;
• and
• setting the selected channel number as a channel number when the selected channel number is the optimal channel number.

The computer-readable storage medium encoded with computer-executable instructions for performing a method, composed of:

• transmitting a probe request frame to the peripheral access point devices;
• receiving beacon frames transmitted from the peripheral access point devices for a predetermined time, searching channel numbers used by the peripheral access point devices, and
• extracting channel numbers from direct sequence parameter sets of frame bodies of the beacon frames;
• extracting the channel numbers from the beacon frames, and storing the extracted channel numbers;
• selecting one of the channel numbers except for the used channel numbers, and deciding whether the selected channel number is an optimal channel number;
• and
• setting the selected channel number as a channel number when the selected channel number is the optimal channel number.

The computer-readable storage medium encoded with computer-executable instructions for performing a method composed of:

• transmitting a probe request frame to the peripheral access point devices;
• receiving information from peripheral access point devices, and searching channel numbers used by the peripheral access point devices;
• extracting channel numbers from the received probe response frames;
• selecting one of the channel numbers except for the used channel numbers;
• deciding whether the channel numbers obtained by subtracting one and two from the selected channel number and the channel numbers obtained by adding one and two to the selected channel number have been used;
• and
• setting the selected channel number as a channel number when the selected channel number is the optimal channel number.