Learning mechanism to configure power save parameters for automatic power save delivery

• US 20070238438A1
• Filed: 03/30/2006
• Published: 10/11/2007
• Est. Priority Date: 03/30/2006
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Ginzburg, Boris, Alon, Ayelet
• Granted Patent: US 7,668,129 B2
• Time in Patent Office: Days
• US Class Current: 455/343.200
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A mechanism to configure power save parameters of a wireless client station. When data frames carrying voice, video, or other multimedia traffic are received at the client station via a wireless link, a frame rate of the received data frames is measured for a period of time. Then a power save parameter of the client station is configured based on the measuring to adjust delivery of the data frames to the client station during a power save state of the client station.

Claims

1. A method, comprising:

receiving data frames carrying voice, video, or other multimedia traffic at a client station via a wireless link;

measuring a frame rate of the received data frames for a period of time; and

configuring a power save parameter of the client station based on the measuring to adjust a delivery characteristic of the data frames to the client station during a power save state of the client station.

2. The method of claim 1, wherein the power save state comprises an unscheduled power save delivery state using trigger and deliver mechanisms for receiving the data frames over the wireless link.

3. The method of claim 2, wherein configuring the power save parameter of the client station comprises setting a trigger rate of the client station according to an estimation of the frame rate of the received data frames.

4. The method of claim 1, wherein measuring the frame rate of the received data frames comprises:

entering the client station into a learning state;

indicating to an access point via the wireless link that the client station has entered an active mode of operation to freely receive the data frames from the access point; and

counting a number of the data frames received during the period of time while in the learning state.

5. The method of claim 4, wherein freely receiving the data frames comprises receiving the data frames without first transmitting one of a PS-poll frame or a trigger frame.

6. The method of claim 4, further comprising:

exiting the learning state and entering the client station into the power save state if;

(1) a learning timer expires, (2) the data frames received during the learning state are recognized as voice or video traffic, and (3) the frame rate is determined to be within a valid rate range; and

indicating to the access point that the client station has entered the power save state.

7. The method of claim 6, further comprising returning the client station to the learning state if the frame rate of the data frames received during the power save state becomes greater than expected.

8. The method of claim 6, further comprising exiting the power save state and entering the client station into a legacy state of operation, if:

(1) a received or transmit timer within the client station expires, (2) the frame rate of the data frames received during the power save state exceeds a maximum rate, or (3) any of background type traffic or best effort type traffic is received from the access point while in the power save state.

9. The method of claim 4, further comprising:

exiting the learning state and returning the client station to a legacy state of operation if;

(1) a learning timer expires and the data frames received during the learning state are not recognized as voice or video traffic, (2) the learning timer expires and the frame rate is determined to be outside a valid rate range, or (3) any of background type traffic or best effort type traffic is received from the access point while in the learning state.

10. A machine-readable storage medium that provides instructions that, if executed by a machine, will cause the machine to perform operations comprising:

receiving data frames carrying voice or video traffic at a client station via a wireless link;

measuring a frame rate of the received data frames for a period of time; and

configuring a power save parameter of the client station based on the measuring to adjust a delivery characteristic of the data frames to the client station during a power save state of the client station.

11. The machine-readable storage medium of claim 10 wherein the power save state comprises an unscheduled power save delivery state and wherein configuring the power save parameter of the client station comprises setting a trigger rate of the client station to approximately equal the frame rate of the received data frames.

12. The machine-readable storage medium of claim 10 wherein measuring the frame rate of the received data frames comprises:

entering the client station into a learning state;

indicating to an access point via the wireless link that the client station has entered an active mode of operation to freely receive the data frames from the access point; and

counting a number of the data frames received during the period of time while in the learning state.

13. The machine-readable storage medium of claim 12, further providing instructions that, if executed by the machine, will cause the machine to perform further operations, comprising:

exiting the learning state and entering the client station into the power save state if;

(1) a learning timer expires, (2) the data frames received during the learning state are recognized as voice or video traffic, and (3) the frame rate is determined to be within a valid rate range; and

indicating to the access point that the client station has entered the power save state.

14. The machine-readable storage medium of claim 13, further providing instructions that, if executed by the machine, will cause the machine to perform further operations, comprising:

returning the client station to the learning state if the frame rate of the data frames received during the power save state becomes greater than expected.

15. The machine-readable storage medium of claim 13, further providing instructions that, if executed by the machine, will cause the machine to perform further operations, comprising:

exiting the power save state and entering the client station into a legacy state of operation, if;

(1) a received or transmit timer within the client station expires, (2) the frame rate of the data frames received during the power save state exceeds a maximum rate, or (3) any of background type traffic or best effort type traffic is received from the access point while in the power save state.

16. The machine-readable storage medium of claim 12, further providing instructions that, if executed by the machine, will cause the machine to perform further operations, comprising:

exiting the learning state and returning the client station to a legacy state of operation if;

(1) a learning timer expires and the data frames received during the learning state are not recognized as voice or video traffic, (2) the learning timer expires and the frame rate is determined to be outside a valid rate range, or (3) any of background type traffic or best effort type traffic is received from the access point while in the learning state.

17. A wireless client station, comprising:

a dipole antenna;

a processor to execute instructions, the processor coupled to the dipole antenna; and

a memory to store the instructions, the memory coupled to the processor to provide the instructions thereto, which when executed by the processor cause the wireless client station to perform operations comprising;

receiving data frames carrying voice or video traffic via the dipole antenna;

measuring a frame rate of the received data frames for a period of time; and

configuring a power save parameter of the wireless client station based on the measured frame rate to adjust delivery of the data frames to the wireless client station during a power save state of the wireless client station.

18. The wireless client station of claim 17, wherein measuring the frame rate of the received data frames comprises:

entering the wireless client station into a learning state;

indicating to an access point via a wireless link that the wireless client station has entered an active mode of operation to freely receive the data frames from the access point; and

counting a number of the data frames received during the period of time while in the learning state.

19. The wireless client station of claim 18, wherein the memory stores further instructions, which when executed by the processor cause the wireless client station to perform further operations comprising:

exiting the learning state and entering the wireless client station into the power save state if;

(1) a learning timer expires, (2) the data frames received during the learning state are recognized as voice or video traffic, and (3) the frame rate is determined to be within a valid rate range; and

indicating to the access point that the wireless client station has entered the power save state.

20. The wireless client station of claim 19, wherein the memory stores further instructions, which when executed by the processor cause the wireless client station to perform further operations comprising:

returning the wireless client station to the learning state if the frame rate of the data frames received during the power save state becomes greater than expected.

21. The wireless client station of claim 19, wherein the memory stores further instructions, which when executed by the processor cause the wireless client station to perform further operations comprising:

exiting the power save state and entering the wireless client station into a legacy state of operation, if;

(1) a received or transmit timer within the wireless client station expires, (2) the frame rate of the data frames received during the power save state exceeds a maximum rate, or (3) any of background type traffic or best effort type traffic is received from the access point while in the power save state.

22. The wireless client station of claim 18, wherein the memory stores further instructions, which when executed by the processor cause the wireless client station to perform further operations comprising:

exiting the learning state and returning the wireless client station to a legacy state of operation if;

(1) a learning timer expires and the data frames received during the learning state are not recognized as voice or video traffic, (2) the learning timer expires and the frame rate is determined to be outside a valid rate range, or (3) any of background type traffic or best effort type traffic is received from the access point while in the learning state.