Dynamic adaptive and non-adaptive mode switching

Patent metadata

Field	Value
Publication number	US-9681422-B2
Application number	US-201514692221-A
Country	US
Kind code	B2
Filing date	Apr 21, 2015
Priority date	Dec 31, 2014
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

A method of operating a transceiver may comprise operating in an adaptive mode in which transmissions from the transceiver are halted after detection of interference, performing a clear channel assessment (CCA), as a result of the CCA, detecting energy from an interferer above a predetermined threshold, and switching operation to a non-adaptive mode in which the transceiver is configured to alternate transmission periods and idle periods according to a duty cycle. Then, the method may comprise performing an energy detect, as a result of the energy detect, subsequently detecting the energy from the interferer below the predetermined threshold, and switching operation to the adaptive mode.

First claim

The invention claimed is:

1. A method of operating a transceiver, the method comprising:
operating in an adaptive mode in which transmissions from the transceiver are halted after detection of interference;
performing a clear channel assessment (CCA);
as a result of the CCA, detecting energy from an interferer above a predetermined threshold;
in response to the detection, switching operation to a non-adaptive mode in which the transceiver is configured to alternate transmission periods and idle periods according to a duty cycle;
subsequent to switching operation to the non-adaptive mode, performing an energy detect;
as a result of the energy detect, subsequently detecting the energy from the interferer below the predetermined threshold; and
in response to the subsequent detection, switching operation to the adaptive mode.

2. The method of claim 1 , wherein the duty cycle is determined based at least on the following equation:

DC
=

10

1
-

dBm
10

where DC is the duty cycle as a decimal and dBm is the transmit power in milliwatt decibels.

3. The method of claim 2 , wherein the duty cycle is 10%.

4. The method of claim 1 , wherein each cycle of the duty cycle is under 50 milliseconds.

5. The method of claim 1 , wherein the interferer is one of a UNIVERSAL SERIAL BUS (USB) 3.0 device, a depth camera, or a WLAN-enabled device.

6. The method of claim 1 , wherein the transceiver is part of a WLAN-enabled device.

7. The method of claim 1 , wherein the WLAN-enabled device is a computing device.

8. The method of claim 7 , wherein the computing device is a console computing device, mobile computing device, mobile communication device, or personal computer.

9. A wireless local area network (WLAN)-enabled device comprising memory and a processing subsystem, the processing subsystem comprising a wireless communication chip and a processor configured to execute a chip driver, the wireless communication chip comprising a transceiver and firmware, wherein the processing subsystem is configured to:
operate the transceiver in an adaptive mode in which transmissions are halted after detection of interference;
perform a clear channel assessment (CCA);
as a result of the CCA, detect energy from an interferer above a predetermined threshold;
in response to the detection, switch operation to a non-adaptive mode in which the transceiver is configured to alternate transmission periods and idle periods according to a duty cycle;
subsequent to switching operation to the non-adaptive mode, perform an energy detect;
as a result of the energy detect, subsequently detect the energy from the interferer below the predetermined threshold; and
in response to the subsequent detection, switch operation to the adaptive mode.

10. The WLAN-enabled device of claim 9 , wherein the duty cycle is determined based at least on the following equation:

DC
=

10

1
-

dBm
10

where DC is the duty cycle as a decimal and dBm is the transmit power in milliwatt decibels.

11. The WLAN-enabled device of claim 10 , wherein the duty cycle is 10%.

12. The WLAN-enabled device of claim 9 , wherein each cycle of the duty cycle is under 50 milliseconds.

13. The WLAN-enabled device of claim 9 , wherein the interferer is one of a UNIVERSAL SERIAL BUS (USB) 3.0 device, a depth camera, or a second WLAN-enabled device.

14. The WLAN-enabled device of claim 9 , wherein the WLAN-enabled device is a computing device.

15. The WLAN-enabled device of claim 9 , wherein the computing device is a console computing device, mobile computing device, mobile communication device, or personal computer.

16. A wireless local area network (WLAN)-enabled device comprising memory and a processing subsystem, the processing subsystem comprising a wireless communication chip and a processor configured to execute a chip driver, the wireless communication chip comprising a transceiver and firmware, wherein the processing subsystem is configured to:
operate the transceiver in an adaptive mode in which transmissions are halted after detection of interference;
perform a clear channel assessment (CCA);
as a result of the CCA, detect energy from an interferer above a predetermined threshold;
in response to the detection, switch operation to a non-adaptive mode in which the transceiver is configured to alternate transmission periods and idle periods according to a duty cycle;
subsequent to switching operation to the non-adaptive mode, perform an energy detect;
as a result of the energy detect, subsequently detect the energy from the interferer below the predetermined threshold; and
in response to the subsequent detection, switch operation of the transceiver to the adaptive mode; wherein
the WLAN-enabled device is a computing device; and
the duty cycle is determined based at least on the following equation:

DC
=

10

1
-

dBm
10

 where DC is the duty cycle as a decimal and dBm is the transmit power in milliwatt decibels.

Assignees

• Microsoft Technology Licensing Llc

Inventors

• Nakahara Mike
• Adermann Stanley William

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W74/0816 Primary

  with collision avoidance · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title

• H04W76/048

  Electricity · mapped topic