Systems and methods for receiving data at an access point
First Claim
Patent Images
1. A method of receiving data by a station, the method comprising:
- entering a standby mode;
waking up, from the standby mode, at a target beacon transmission time (TBTT) for receiving a beacon frame;
receiving the beacon frame after the waking up;
re-entering the standby mode after the receiving of the beacon frame;
waking up, after the re-entering of the standby mode, at a first time offset based on the TBTT for receiving a first rate traffic indication map (TIM) frame; and
receiving the first rate TIM frame after the first time offset.
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Abstract
Stations in standby mode periodically wake up to check for buffered data at the access points. Traditionally, the information is available by checking the periodic beacon frame for a traffic indication map (TIM). Unfortunately, the length of beacons has steadily increased with the progression of the various wireless standards requiring stations to wake up for longer periods to merely check for buffered data. Several approaches are disclosed which address this shortcoming, including the broadcast of TIM frames, the partial reception of beacon frames and the use of an embedded TIM frame within a beacon frame.
3 Citations
15 Claims
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1. A method of receiving data by a station, the method comprising:
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entering a standby mode; waking up, from the standby mode, at a target beacon transmission time (TBTT) for receiving a beacon frame; receiving the beacon frame after the waking up; re-entering the standby mode after the receiving of the beacon frame; waking up, after the re-entering of the standby mode, at a first time offset based on the TBTT for receiving a first rate traffic indication map (TIM) frame; and receiving the first rate TIM frame after the first time offset. - View Dependent Claims (2, 3, 4, 5)
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6. A station for receiving data, the station comprising:
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a processor; a memory comprising instructions; the instructions causing the processor to; enter a standby mode; wake up, from the standby mode, at a target beacon transmission time (TBTT) for receiving a beacon frame; receive the beacon frame after waking up; re-enter the standby mode after receiving the beacon frame; wake up, after re-entering the standby mode, at a first time offset based on the TBTT for receiving a first rate traffic indication map (TIM) frame; and receive the first rate TIM frame after the first time offset. - View Dependent Claims (7, 8, 9, 10)
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11. An access point comprising:
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a processor; a wireless network interface device; and a memory comprising instructions; the instructions causing the processor to cause the wireless network interface device to; enter a standby mode; wake up, from the standby mode, at a target beacon transmission time (TBTT) for receiving a beacon frame; receive the beacon frame after waking up; re-enter the standby mode after receiving the beacon frame; wake up, after re-entering the standby mode, at a first time offset based on the TBTT for receiving a first rate traffic indication map (TIM) frame; and receive the first rate TIM frame after the first time offset. - View Dependent Claims (12, 13, 14, 15)
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Specification