System of wireless local area network based on transmit power control and method for controlling transmit power
First Claim
1. A wireless local area network (LAN) system based on transmit power control, comprising:
- an access point (AP) for broadcasting a beacon frame to an area that is outside a service coverage of a first transmit power by using a second transmit power, higher than the first transmit power, already set when it reaches a set period, and for increasing the first transmit power when there is an increase request to increase the first transmit power based on the beacon frame broadcast with the second transmit power; and
a station for requesting an increase in the first transmit power on the basis of a received beacon frame to make an association with the AP when the station receives the beacon frame broadcast from the AP with the second transmit power when the station is outside the service coverage of the first transmit power.
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Accused Products
Abstract
A system of a wireless local area network (LAN) based on transmit power control comprises: an access point (AP) for broadcasting a beacon frame to an area that is outside a service coverage of a first transmit power by using a second transmit power higher than the first transmit power already set when it reaches a set period, and for increasing the first transmit power if there is a request for increase of the first transmit power based on the beacon frame broadcast by the second transmit power; and a station which requests an increase in the first transmit power on the basis of the received beacon frame so as to enable the station to have an association with the AP. The increase is requested when the station receives the beacon frame broadcast from the AP with the second transmit power when the station is outside the service coverage of the first transmit power. The AP periodically transmits a strong beacon frame having local maximum transmit power (LMTP), and then provides a station existing outside the transmit power coverage of a current AP with basic service set (BSS) information. In this way, a newly approaching station can be provided with a basis for associating and communicating with the BSS with ease.
119 Citations
29 Claims
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1. A wireless local area network (LAN) system based on transmit power control, comprising:
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an access point (AP) for broadcasting a beacon frame to an area that is outside a service coverage of a first transmit power by using a second transmit power, higher than the first transmit power, already set when it reaches a set period, and for increasing the first transmit power when there is an increase request to increase the first transmit power based on the beacon frame broadcast with the second transmit power; and
a station for requesting an increase in the first transmit power on the basis of a received beacon frame to make an association with the AP when the station receives the beacon frame broadcast from the AP with the second transmit power when the station is outside the service coverage of the first transmit power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for controlling transmit power of an access point (AP), comprising the steps of:
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broadcasting a beacon frame to an area that is outside a service coverage of a first transmit power by using a second transmit power, higher than the first transmit power, already set when it reaches a set period; and
increasing the first transmit power when stations of the area that are outside the service coverage of the first transmit power receive the beacon frame broadcast by the second transmit power and request an increase in the first transmit power in order to make an association with the AP. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A method for controlling transmit power of a station in a wireless local area network (LAN) system, comprising the steps of:
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requesting an increase in first transmit power on the basis of a received beacon frame so as to make an association with an access point (AP) when a beacon frame broadcast with second transmit power, higher than the first transmit power, is received from the AP in a state of association with the AP outside a service coverage of the first transmit power of the AP; and
forming a link to the AP that transmits the frame with the increased first transmit power, and performing a new association with the AP. - View Dependent Claims (23, 24, 25, 26)
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27. A wireless local area network (LAN) system based on transmit power control, comprising:
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an access point (AP) for transmitting basic service set (BSS) information to an area that is outside a service coverage of first transmit power by using second transmit power higher than first transmit power, already set when it reaches a set period, and for increasing the first transmit power when there is an increase request to increase the first transmit power based on the BSS information transmitted with the second transmit power; and
a station for requesting the increase of the first transmit power on the basis of received BSS information so as to make an association with the AP when receiving the BSS information transmitted from the AP with the second transmit power when the station receiving the BSS information is outside the service coverage of the first transmit power.
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28. A method for controlling transmit power of an access point (AP), comprising the steps of:
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transmitting basic service set (BSS) information to an area that is outside a service coverage of first transmit power by using second transmit power, higher than the first transmit power, already set when it reaches a set period; and
increasing the first transmit power when stations that are outside the service coverage of the first transmit power receive the BSS information transmitted by the second transmit power and request increase of the first transmit power in order to make an association with the AP.
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29. A method for controlling transmit power of a station in a wireless local area network (LAN) system based on transmit power control, comprising the steps of:
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requesting an increase of first transmit power on the basis of received basic service set (BSS) information received in order to make an association with an access point (AP) when receiving the BSS information transmitted with second transmit power higher than the first transmit power, from the AP when the station is outside a service coverage of the first transmit power of the AP and is not associated with the AP; and
forming a link to the AP that transmits a frame with increased first transmit power, and performing a new association with the AP.
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Specification