Automatic power save delivery (APSD) compatible with 802.11n frame aggregation and block acknowledgement
AssigneeNokia Corporation
InventorsJarkko Kneckt, Jari Jokela
Life of this patent
Estimating the term…
Abstract
A mechanism to create Automatic Power Save Delivery (APSD) compatible with 802.11n frame aggregation and block acknowledgement (ack) mechanisms is provided. Various methods of using block acknowledgments are provided. Additionally, bit handling for defining an unscheduled APSD (U-APSD) service period and ending it is explained. A method of aggregating a plurality of data frames into an aggregated data frame, starting a service period based on the transmitting of the aggregated frame, receiving an acknowledgement for the transmitted frame, and upon receiving the acknowledgement frame containing an indicator indicating end of service period, entering low power mode of operation is enabled.
Claims34
A method, comprising:
- receiving a trigger frame from a first station;
- triggering a service period based on receiving the trigger frame;
- and
- sending a termination bit to the first station, wherein the sending the termination bit to the first station is configured to result in an end of the service period.
A method, comprising:
- sending a trigger frame to a second station, wherein the trigger frame is configured to trigger a service period based upon reception thereof;
- receiving a termination bit from the second station;
- and
- ending the service period based on the termination bit.
A first station, comprising:
- a transmission unit configured to send a trigger frame to a second station, wherein the trigger frame is configured to trigger a service period based upon reception thereof;
- a reception unit configured to receive a termination bit from the second station;
- and
- a processor unit configured to end the service period based on the termination bit.
A first station, comprising:
- transmission means for sending a trigger frame to a second station, wherein the trigger frame is configured to trigger a service period based upon reception thereof;
- reception means for receiving a termination bit from the second station;
- and
- processor means for ending the service period based on the termination bit.
A second station, comprising:
- reception means for receiving a trigger frame from a first station;
- processor means for triggering a service period based on receiving the trigger frame;
- and
- transmission means for sending a termination bit to the first station, wherein the sending the termination bit to the first station is configured to result in an end of the service period.
A second station, comprising:
- a reception unit configured to receive a trigger frame from a first station;
- a processor unit configured to trigger a service period based on receiving the trigger frame;
- and
- a transmission unit configured to send a termination bit to the first station, wherein the sending the termination bit to the first station is configured to result in an end of the service period.
A method, comprising:
- transmitting an ACK frame from a first station;
- terminating a service period for delayed block acknowledgement using the ACK frame;
- when a block acknowledgement frame is received and indicates that all transmitted frames were received correctly, maintaining a current state instead of triggering a new service period;
- and
- when the block acknowledgement frame is received and indicates that not all the transmitted frames were received correctly, triggering the new service period.
Dependencies are inferred from the claim text.