Hybrid power save delivery method in a wireless local area network for real time communication
First Claim
1. A method of performing power save operation in a wireless local area network (WLAN) by a mobile station, a recurring service period schedule set up between the mobile station and an access point including regularly scheduled service periods for a reserved traffic stream, the reserved traffic stream identified by a reserved traffic stream identifier, the mobile station having a WLAN subsystem that is initially in a low power mode, the method comprising:
- powering up the WLAN subsystem of the mobile station;
commencing a scheduled service period;
receiving from the access point at the end of a scheduled service period an indication that the access point has more reserved data of a reserved traffic stream in a buffer of the access point at an end of the scheduled service period;
placing the WLAN subsystem into low power mode at the end of the scheduled service period commencing an unscheduled service period to retrieve the remaining data buffered at the access point for the mobile station, comprising;
powering up the WLAN subsystem;
transmitting a polling frame to the access point, the polling frame including the reserved traffic stream identifier;
receiving at least one response frame form the access point in response to transmitting the polling frame; and
placing the WLAN subsystem into low power mode after receiving the at least one response frame.
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Accused Products
Abstract
A mobile station establishes a schedule by which data is exchanged with an access point. The schedule allows the mobile station to use a low power mode at times outside of the scheduled service periods. However, the mobile station may occasionally need to retrieve additional data from the access point, or transmit additional data to the access point, and so initiates an unscheduled service period to do so.
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Citations
14 Claims
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1. A method of performing power save operation in a wireless local area network (WLAN) by a mobile station, a recurring service period schedule set up between the mobile station and an access point including regularly scheduled service periods for a reserved traffic stream, the reserved traffic stream identified by a reserved traffic stream identifier, the mobile station having a WLAN subsystem that is initially in a low power mode, the method comprising:
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powering up the WLAN subsystem of the mobile station;
commencing a scheduled service period;
receiving from the access point at the end of a scheduled service period an indication that the access point has more reserved data of a reserved traffic stream in a buffer of the access point at an end of the scheduled service period;
placing the WLAN subsystem into low power mode at the end of the scheduled service period commencing an unscheduled service period to retrieve the remaining data buffered at the access point for the mobile station, comprising;
powering up the WLAN subsystem;
transmitting a polling frame to the access point, the polling frame including the reserved traffic stream identifier;
receiving at least one response frame form the access point in response to transmitting the polling frame; and
placing the WLAN subsystem into low power mode after receiving the at least one response frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of retrieving data from an access point by a mobile station in a wireless local area network (WLAN), the reserved data corresponding to a reserved traffic stream and identified by a reserved traffic stream identifier, the method comprising:
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performing a scheduled transaction between the mobile station and access point during a scheduled service period, the mobile station transitioning from a low power WLAN mode to an active WLAN mode to commence the scheduled transaction, and then transitioning from the active WLAN mode to a low power WLAN mode upon completion the scheduled transaction; and
performing an unscheduled transaction between the mobile station and access point during an unscheduled service period, the mobile station transitioning from a low power WLAN mode to an active WLAN mode to initiate the unscheduled transaction, and then transitioning from the active WLAN mode to a low power WLAN mode upon completing the unscheduled transaction;
- View Dependent Claims (11, 12, 13, 14)
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Specification