Techniques for wakeup signaling for a very low power WLAN device
First Claim
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1. A method of wakeup signaling for a very low power wireless local area network (WLAN) device, comprising:
- transmitting by an access point (AP) operable in said WLAN of a wake-up signal that can be received using low-power techniques at a receiver associated with said device;
wherein said AP is capable of negotiating with devices operating in said WLAN to determine a wake-up frequency per device and wherein said AP can then synthesize a wide-band wake-up packet containing multiple narrowband pilots for an individual device or groups of devices using orthogonal frequency division multiplexing (OFDM) and unused or unallocated subcarriers can be filled to maintain spectral flatness, andwherein a wake-up signal is embedded in unused subcarriers at an edge of an otherwise normal OFDM transmission and wherein said subcarriers are used in a WLAN packet and wherein said subcarriers are present only in a data field portion of said WLAN packet.
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Abstract
An embodiment of the present invention provides a method of wakeup signaling for a very low power wireless local area network device (WLAN) device, comprising transmitting by an access point operable in the WLAN of a wake-up signal that can be received using low-power techniques at a receiver associated with the device.
24 Citations
18 Claims
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1. A method of wakeup signaling for a very low power wireless local area network (WLAN) device, comprising:
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transmitting by an access point (AP) operable in said WLAN of a wake-up signal that can be received using low-power techniques at a receiver associated with said device; wherein said AP is capable of negotiating with devices operating in said WLAN to determine a wake-up frequency per device and wherein said AP can then synthesize a wide-band wake-up packet containing multiple narrowband pilots for an individual device or groups of devices using orthogonal frequency division multiplexing (OFDM) and unused or unallocated subcarriers can be filled to maintain spectral flatness, and wherein a wake-up signal is embedded in unused subcarriers at an edge of an otherwise normal OFDM transmission and wherein said subcarriers are used in a WLAN packet and wherein said subcarriers are present only in a data field portion of said WLAN packet. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer readable medium encoded with computer executable instructions, which when accessed, cause a machine to perform operations comprising:
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signaling a wakeup for a very low power wireless local area network (WLAN) device by transmitting from an access point (AP) operable in said WLAN of a wake-up signal that can be received using low-power techniques at a receiver associated with said device; wherein said AP is capable of negotiating with devices operating in said WLAN to determine a wake-up frequency per device and wherein said AP can then synthesize a wide-band wake-up packet containing multiple narrowband pilots for an individual device or groups of devices using orthogonal frequency division multiplexing (OFDM) and unused or unallocated subcarriers can be filled to maintain spectral flatness, and wherein a wake-up signal is embedded in unused subcarriers at an edge of an otherwise normal OFDM transmission and wherein said subcarriers are used in a WLAN packet and wherein said subcarriers are present only in a data field portion of said WLAN packet. - View Dependent Claims (7, 8, 9, 10)
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11. An apparatus, comprising:
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an access point (AP) operable in a wireless local area network (WLAN) and adapted to provide wakeup signaling for a very low power WLAN device by transmitting a wake-up signal that can be received using low-power techniques to a receiver associated with said device; wherein said AP is capable of negotiating with devices operating in said WLAN to determine a wake-up frequency per device and wherein said AP can then synthesize a wide-band wake-up packet containing multiple narrowband pilots for an individual device or groups of devices using orthogonal frequency division multiplexing (OFDM) and unused or unallocated subcarriers can be filled to maintain spectral flatness, and wherein a wake-up signal is embedded in unused subcarriers at an edge of an otherwise normal OFDM transmission and wherein said subcarriers are used in a WLAN packet and wherein said subcarriers are present only in a data field portion of said WLAN packet. - View Dependent Claims (12, 13, 14)
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15. An apparatus, comprising:
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a mobile device capable of communicating with an access point (AP) and operable in a wireless local area network (WLAN), said AP adapted to provide wakeup signaling for said mobile device by transmitting a wake-up signal that can be received using low-power techniques to a receiver associated with said mobile device; wherein said AP is capable of negotiating with devices operating in said WLAN to determine a wake-up frequency per device and wherein said AP can then synthesize a wide-band wake-up packet containing multiple narrowband pilots for an individual device or groups of devices using orthogonal frequency division multiplexing (OFDM) and unused or unallocated subcarriers can be filled to maintain spectral flatness, and wherein a wake-up signal is embedded in unused subcarriers at an edge of an otherwise normal OFDM transmission and wherein said subcarriers are used in a WLAN packet and wherein said subcarriers are present only in a data field portion of said WLAN packet. - View Dependent Claims (16, 17, 18)
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Specification