Method and apparatus for reducing power consumption of wireless LAN device
First Claim
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1. A method of reducing power consumption of a wireless local area network (LAN) device complying with the IEEE 802.1 in standard, the method comprising:
- (a) receiving at the wireless LAN device a high throughput (HT) frame complying with a TGnSync Alliance standard while the wireless LAN device is in a reception mode;
(b) judging whether the received HT frame is decodable by the wireless LAN device based on whether the wireless LAN device supports at least one transmission characteristic of the HT frame;
(c) if it is judged that the received HT frame is not decodable by the wireless LAN device, switching the wireless LAN device into a standby mode from the reception mode, and maintaining the wireless LAN device in the standby mode for a duration of the HT frame; and
(d) if it is judged that the received HT frame is decodable by the wireless LAN device, maintaining the wireless LAN device in the reception mode, and decoding the HT frame at the wireless LAN device,wherein a PHY header of the HT frame comprises at least a legacy signal field (L-SIG field) and an HT signal field (HT-SIG field), andwherein the L-SIG field includes a RATE field for informing a legacy device of a transmission rate for the legacy device, andwherein the HT-SIG field includes a modulation coding scheme (MCS) field informing an HT device of the transmission characteristics of the HT frame, and an HT LENGTH field informing the HT device of size of a MAC protocol data unit (MPDU) of the HT frame.
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Abstract
A method and apparatus for reducing the power consumption of a wireless LAN device that operates in a wireless network are disclosed. The method for reducing the power consumption includes receiving a high throughput (HT) frame; judging whether the received HT frame is decodable; and if the received HT frame is not decodable, switching the wireless LAN device into a standby mode, and maintaining the device in the standby mode for a duration of the HT frame.
26 Citations
25 Claims
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1. A method of reducing power consumption of a wireless local area network (LAN) device complying with the IEEE 802.1 in standard, the method comprising:
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(a) receiving at the wireless LAN device a high throughput (HT) frame complying with a TGnSync Alliance standard while the wireless LAN device is in a reception mode; (b) judging whether the received HT frame is decodable by the wireless LAN device based on whether the wireless LAN device supports at least one transmission characteristic of the HT frame; (c) if it is judged that the received HT frame is not decodable by the wireless LAN device, switching the wireless LAN device into a standby mode from the reception mode, and maintaining the wireless LAN device in the standby mode for a duration of the HT frame; and (d) if it is judged that the received HT frame is decodable by the wireless LAN device, maintaining the wireless LAN device in the reception mode, and decoding the HT frame at the wireless LAN device, wherein a PHY header of the HT frame comprises at least a legacy signal field (L-SIG field) and an HT signal field (HT-SIG field), and wherein the L-SIG field includes a RATE field for informing a legacy device of a transmission rate for the legacy device, and wherein the HT-SIG field includes a modulation coding scheme (MCS) field informing an HT device of the transmission characteristics of the HT frame, and an HT LENGTH field informing the HT device of size of a MAC protocol data unit (MPDU) of the HT frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18)
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9. A method of reducing power consumption of a wireless local area network (LAN) device complying with the IEEE 802.1 in standard, the method comprising:
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(a) receiving a high throughput (HT) frame complying with a TGnSync Alliance standard at the wireless LAN device while the wireless LAN device is in a reception mode; (b) judging whether the received HT flame is decodable by the wireless LAN device based on whether the wireless LAN device supports at least one transmission characteristic of the HT flame; (c) if it is judged that the received HT frame is not decodable by the wireless LAN device, judging whether a spoofing has occurred in the HT flame; and (d) if it is judged in (c) that the spoofing has occurred, switching the wireless LAN device into a standby mode from the reception mode, and maintaining the wireless LAN device in the standby mode for a legacy duration, wherein a PHY header of the HT frame comprises at least a legacy signal field (L-SIG field) and an HT signal field (HT-SIG field), and wherein the L-SIG field includes a RATE field for informing a legacy device of a transmission rate for the legacy device, and wherein the HT-SIG field includes a modulation coding scheme (MCS) field informing an HT device of the transmission characteristics of the HT frame, and an HT LENGTH field informing the HT device of the size of the (MPDU) of the HT frame. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 19)
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20. A wireless local area network (LAN) device complying with the IEEE 802.1 in standard, the wireless LAN device comprising:
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a radio frequency (RF) unit which receives a high throughput (HT) frame complying with a TGnSync Alliance standard while the wireless LAN device is in a reception mode; a decoding judgment unit which judges whether the received HT frame is decodable by the wireless LAN device based on whether the device supports at least one transmission characteristic of the HT frame; a mode switching unit which switches the wireless LAN device into a standby mode from a reception mode if it judged that the received HT frame is not decodable by the wireless LAN device, and maintains the wireless LAN device in the standby mode for a duration of the HT frame, and if it is judged that the received HT frame is decodable by the wireless LAN device, maintains the wireless LAN device in the reception mode to decode the HT frame; and a power source which supplies a corresponding power depending on a mode of the mode switching unit, wherein a PHY header of the HT frame comprises at least a legacy signal field (L-SIG field) and an HT signal field (HT-SIG field), and wherein the L-SIG field includes a RATE field for informing a legacy device of a transmission rate for the legacy device, and wherein the HT-SIG field includes a modulation coding scheme (MCS) field informing an HT device of the transmission characteristics of the HT frame, and an HT LENGTH field informing the HT device of the size of the (MPDU) of the HT frame. - View Dependent Claims (21, 22)
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23. A wireless local area network (LAN) device complying with the IEEE 802.1 in standard, the wireless LAN device comprising:
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a radio frequency (RF) unit which receives a high throughput (HT) frame complying with a TGnSync Alliance standard while the wireless LAN device is in a reception mode; a decoding judgment unit which judges whether the received HT frame is decodable by the wireless LAN device based on whether the wireless LAN device supports at least one transmission characteristic of the HT frame; a mode switching unit which judges whether a spoofing has occurred in the HT frame if it is judged that the received HT frame is not decodable by the wireless LAN device, and if it is judged that spoofing has occurred, switches the wireless LAN device into a standby mode from the reception mode, and maintains the wireless LAN device in the standby mode for a legacy duration; and power source which supplies a corresponding power depending on a mode of the mode switching unit, wherein a PHY header of the HT frame comprises at least a legacy signal field (L-SIG field) and an HT signal field (HT-SIG field), and wherein the L-SIG field includes a RATE field for informing a legacy device of a transmission rate for the legacy device, and wherein the HT-SIG field includes a modulation coding scheme (MCS) field informing an HT device of the transmission characteristics of the HT frame, and an HT LENGTH field informing the HT device of the size of the (MPDU) of the HT frame. - View Dependent Claims (24, 25)
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Specification