Method and apparatus for controlling power consumption of stations on a CSMA/CA-based wireless LAN
First Claim
1. A method of controlling power consumption of a station when it receives a wireless local area network signal using a hierarchical structure having a first layer and a second layer, the method comprising:
- extracting information on frame transmission speed and transmission period information on the first and second layers from the wireless signal;
determining a power-controlled period for each of the first and second layers based on the extracted information;
reducing the power consumption of the first and second layers by switching an original mode of the first and second layers to a predetermined mode during the power-controlled period if a reception address included in the extracted information is not identical to an address of the station; and
maintaining the power consumption of the first and second layers at the original mode only when the reception address included in the extracted information is identical to the address of the station,wherein the first layer is an RF layer and the second layer is a baseband layer, andwherein in the predetermined mode, all the elements of the RF layer except for a PLL (Phase Locked Loop) and a first register are powered down and all the elements of the baseband layer except for a second register are powered down.
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Accused Products
Abstract
A method and apparatus controls power consumption of stations having a hierarchical structure when the stations transmit and receive a wireless signal to and from one another on a CSMA/CA wireless LAN. The controlling involves extracting information on frame transmission speed and transmission period information on first and second layers of the hierarchical structure from the wireless signal; determining a power-controlled period for each of the first and second layers based on the extracted information; and reducing the power consumption of the first and second layers by switching a current mode of the first and second layers to a predetermined mode for the power-controlled period if a reception address included in the extracted information is not identical to an address of the station.
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Citations
14 Claims
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1. A method of controlling power consumption of a station when it receives a wireless local area network signal using a hierarchical structure having a first layer and a second layer, the method comprising:
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extracting information on frame transmission speed and transmission period information on the first and second layers from the wireless signal; determining a power-controlled period for each of the first and second layers based on the extracted information; reducing the power consumption of the first and second layers by switching an original mode of the first and second layers to a predetermined mode during the power-controlled period if a reception address included in the extracted information is not identical to an address of the station; and maintaining the power consumption of the first and second layers at the original mode only when the reception address included in the extracted information is identical to the address of the station, wherein the first layer is an RF layer and the second layer is a baseband layer, and wherein in the predetermined mode, all the elements of the RF layer except for a PLL (Phase Locked Loop) and a first register are powered down and all the elements of the baseband layer except for a second register are powered down. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for controlling power consumption of a station when it receives a wireless local area network signal using a hierarchical structure, the apparatus comprising:
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a first layer of the hierarchical structure, the first layer for converting the wireless signal into a baseband signal; a second layer of the hierarchical structure, the second layer for restoring an original signal from the baseband signal; and a received power controller, which determines a power-controlled period for each of the first and second layers and reduces the power consumed by the first and second layers during the power-controlled period by switching an original mode of the first and second layers to a predetermined mode when a reception address included in the restored original signal is not identical to an address of the station, and maintaining the power consumption of the first and second layers at the original mode only when the reception address is identical to the address of the station, wherein the first layer is an RF layer and the second layer is a baseband layer, and wherein in the predetermined mode, all the elements of the RF layer except for a PLL (Phase Locked Loot)) and a first register are powered down and all the elements of the baseband layer except for a second register are powered down. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification