Power saving mechanism for wireless LANs via schedule information vector
First Claim
1. A system for saving power in a wireless network, comprising:
- an access point;
one or more stations; and
an SIV frame comprising;
one or more schedules of wake-up times, corresponding to the one or more stations;
wherein the access point originates and transmits the SIV frame of the scheduled wake-up time to the one or more stations, wherein the one or more stations selectively awake from a sleep mode for data transmission therewith based on the schedule, wherein at least one of the one or more stations determines whether uplink data is to be transmitted from the at least one of the one or more stations to the access point in response to receiving a beacon indicating an identity of the at least one of the one or more stations, keeping the at least one of the one or more stations awake, the at least one of the one or more stations receives a request from the access point to indicate whether the at least one of the one or more stations has uplink data to be transmitted to the access point, and the at least one of the one or more stations sends to the access point prior to receiving the SIV frame an indication that uplink data is to be transmitted to the access point, and where in the at least one of the one or more stations transmits the uplink data to the access point according to the SIV frame.
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Accused Products
Abstract
A new protocol system and method is described that utilizes a Schedule Information Vector (SIV) protocol for saving power in wireless local area networks. The protocol includes an access point, one or more stations, and an SIV frame including an association ID for identifying one of the stations and a scheduled wake-up time for the identified station. The access point originates and transmits the SIV frame protocol of the scheduled wake-up time to the stations. The SIV frame protocol of the wireless network is further operable to dynamically adjust the scheduled wake-up times of the stations, a sequence of the wake-up times, a periodic wake-up time, a plurality of wake-up times, and a duration of the wake-up times of the stations. These adjustments may be made based on network traffic, traffic buffering times, data priorities, data length, and data rates.
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Citations
33 Claims
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1. A system for saving power in a wireless network, comprising:
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an access point; one or more stations; and an SIV frame comprising; one or more schedules of wake-up times, corresponding to the one or more stations; wherein the access point originates and transmits the SIV frame of the scheduled wake-up time to the one or more stations, wherein the one or more stations selectively awake from a sleep mode for data transmission therewith based on the schedule, wherein at least one of the one or more stations determines whether uplink data is to be transmitted from the at least one of the one or more stations to the access point in response to receiving a beacon indicating an identity of the at least one of the one or more stations, keeping the at least one of the one or more stations awake, the at least one of the one or more stations receives a request from the access point to indicate whether the at least one of the one or more stations has uplink data to be transmitted to the access point, and the at least one of the one or more stations sends to the access point prior to receiving the SIV frame an indication that uplink data is to be transmitted to the access point, and where in the at least one of the one or more stations transmits the uplink data to the access point according to the SIV frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A method of saving power in a wireless network comprising an access point, a station, and an SIV frame, the method comprising:
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awaking the station from a sleep mode to monitor a beacon from the access point; determining whether a station'"'"'s association ID is indicated in the beacon; returning the station to the sleep mode if the station'"'"'s association ID is not indicated; keeping the station awake if the station'"'"'s association ID is indicated; determining whether uplink data is to be transmitted from the station if the station'"'"'s association ID is indicated; receiving a contention communication from the access point and responding with a reservation request if there is uplink data to be transmitted from the station to the access point prior to receiving the SIV frame; transferring the SIV frame containing schedule data to the station; returning the station to the sleep mode and awakening the station for data transmission therewith based on the schedule data; determining whether uplink data is to be transmitted from the station to the access point; receiving a request from the access point to indicate whether the station has uplink data to be transmitted from the station to the access point; sending an indication from the station to the access point prior to receiving the SIV frame that uplink data is to be transmitted to the access point; and transmitting the uplink data to the access point according to the SIV frame. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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21. A method of saving power in a wireless network comprising an access point, a station, and an SIV frame, the method comprising:
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awaking the station from a sleep mode to monitor a beacon from the access point; determining whether a station'"'"'s association ID is indicated in the beacon; returning the station to the sleep mode if the station'"'"'s association ID is not indicated; receiving the SIV frame containing schedule data from the access point; returning the station to the sleep mode and awakening the station for data transmission therewith based on the schedule data; determining whether uplink data is to be transmitted from the station to the access point if the station'"'"'s association ID is indicated in the beacon; and keeping the station awake; and receiving a CC from the access point and sending an RR back from the station to the access point prior to receiving the SIV. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification