Adaptive use of receiver diversity

Patent metadata

Field	Value
Publication number	US-10110294-B2
Application number	US-201514952319-A
Country	US
Kind code	B2
Filing date	Nov 25, 2015
Priority date	Mar 14, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A method for adaptively disabling receiver diversity is provided. The method can include a wireless communication device determining an active data traffic pattern; defining a threshold channel quality metric based at least in part on a threshold channel quality needed to support a threshold quality of service for the active data traffic pattern; comparing a measured channel quality to the threshold channel quality metric; and disabling receiver diversity in an instance in which the measured channel quality metric satisfies the threshold channel quality metric.

First claim

What is claimed is:

1. A method to configure receiver diversity for a wireless communication device, the method comprising:
by an apparatus of the wireless communication device:
comparing a physical layer channel quality measurement to a physical layer channel quality metric threshold;
comparing an application layer measurement to an application layer measurement threshold; and
enabling receiver diversity to cause the wireless communication device to use multiple receiver signal chains to receive signals from a wireless network when (i) the physical layer channel quality measurement satisfies the physical layer channel quality metric threshold for disabling receiver diversity and (ii) the application layer measurement fails to satisfy the application layer measurement threshold for disabling receiver diversity,
wherein the physical layer channel quality metric threshold is based at least in part on the application layer measurements.

2. The method of claim 1 , further comprising:
enabling receiver diversity to cause the wireless communication device to use multiple receiver signal chains to receive signals from the wireless network when the physical layer channel quality measurement fails to satisfy the physical layer channel quality metric threshold for disabling receiver diversity.

3. The method of claim 1 , further comprising:
disabling receiver diversity to cause the wireless communication device to use at most a single receiver signal chain to receive signals from the wireless network when (i) the physical layer channel quality measurement satisfies the physical layer channel quality metric threshold for disabling receiver diversity and (ii) the application layer measurement satisfies the application layer measurement threshold for disabling receiver diversity.

4. The method of claim 1 , further comprising:
determining an active data traffic pattern associated with an active application implemented on the wireless communication device,
wherein the physical layer channel quality metric threshold is based at least in part on a physical layer channel quality needed to support the active data traffic pattern associated with the active application.

5. The method of claim 4 , wherein the application layer measurement threshold is based at least in part on an application layer quality of service (QoS) needed to support the active application.

6. The method of claim 4 , wherein the active data traffic pattern comprises one or more of: a data rate, a frequency of data communication, a packet size, or a packet inter-arrival time.

7. The method of claim 4 , wherein the physical layer channel quality metric threshold is based at least in part on a physical layer channel quality required to sustain at least a minimum channel quality indicator (CQI) to support the active data traffic pattern.

8. The method of claim 1 , wherein the physical layer channel quality metric threshold comprises a signal-to-interference-plus-noise ratio (SINR) threshold.

9. The method of claim 1 , wherein the application layer measurement threshold is based at least in part on a round trip time (RTT) measured at an application layer.

10. The method of claim 1 , wherein the application layer measurement threshold is based at least in part on a packet loss rate (PLR) measured at an application layer.

11. The method of claim 1 , wherein the physical layer channel quality metric threshold is based at least in part on a measured indication of loading of a base station serving the wireless communication device.

12. The method of claim 1 , wherein the application layer measurement fails to satisfy the application layer measurement threshold when a measured round trip time (RTT) exceeds a RTT threshold.

13. The method of claim 1 , wherein the application layer measurement fails to satisfy the application layer measurement threshold when a measured packet loss rate (PLR) exceeds a PLR threshold.

14. An apparatus comprising processing circuitry configurable to cause a wireless communication device to:
compare a physical layer channel quality measurement to a physical layer channel quality metric threshold;
compare an application layer measurement to an application layer measurement threshold; and
enable receiver diversity to cause the wireless communication device to use multiple receiver signal chains to receive signals from a wireless network when (i) the physical layer channel quality measurement satisfies the physical layer channel quality metric threshold for disabling receiver diversity and (ii) the application layer measurement fails to satisfy the application layer measurement threshold for disabling receiver diversity,
wherein the physical layer channel quality metric threshold is based at least in part on the application layer measurements.

15. The apparatus of claim 14 , wherein the processing circuitry is further configurable to cause the wireless communication device to:
enable receiver diversity to cause the wireless communication device to use multiple receiver signal chains to receive signals from the wireless network when the physical layer channel quality measurement fails to satisfy the physical layer channel quality metric threshold for disabling receiver diversity.

16. The apparatus of claim 14 , wherein the processing circuitry is further configurable to cause the wireless communication device to:
disable receiver diversity to cause the wireless communication device to use at most a single receiver signal chain to receive signals from the wireless network when (i) the physical layer channel quality measurement satisfies the physical layer channel quality metric threshold for disabling receiver diversity and (ii) the application layer measurement satisfies the application layer measurement threshold for disabling receiver diversity.

17. The apparatus of claim 14 , wherein the processing circuitry is further configurable to cause the wireless communication device to:
determine an active data traffic pattern associated with an active application implemented on the wireless communication device,
wherein the physical layer channel quality metric threshold is based at least in part on a physical layer channel quality needed to support the active data traffic pattern associated with the active application.

18. The apparatus of claim 17 , wherein the application layer measurement threshold is based at least in part on an application layer quality of service (QoS) needed to support the active application.

19. The apparatus of claim 17 , wherein the physical layer channel quality metric threshold is based at least in part on a physical layer channel quality required to sustain at least a minimum channel quality indicator (CQI) to support the active data traffic pattern.

20. A non-transitory computer-readable medium storing instructions that, when executed by processing circuitry of a wireless communication device, cause the wireless communication device to:
compare a physical layer channel quality measurement to a physical layer channel quality metric threshold;
compare an application layer measurement to an application layer measurement threshold; and
enable receiver diversity to cause the wireless communication device to use multiple receiver signal chains to receive signals from a wireless network when (i) the physical layer channel quality measurement satisfies the physical layer channel quality metric threshold for disabling receiver diversity and (ii) the application layer measurement fails to satisfy the application layer m

Assignees

• Apple Inc

Inventors

• Nimmala Srinivasan
• Damji Navid
• Tabet Tarik
• Su Li
• Xing Longda
• Ji Zhu

Classifications

• H04B7/0822

  according to predefined selection scheme · CPC title

• H04B7/0871

  using different reception schemes, at least one of them being a diversity reception scheme · CPC title

• H04B7/0877 Primary

  switching off a diversity branch, e.g. to save power · CPC title

• H04B7/0814

  based on current reception conditions, e.g. switching to different antenna when signal level is below threshold · CPC title

• H04W52/0225

  using monitoring of external events, e.g. the presence of a signal · CPC title