Wireless link control and recovery using positional data

Patent metadata

Field	Value
Publication number	US-2018091202-A1
Application number	US-201615279499-A
Country	US
Kind code	A1
Filing date	Sep 29, 2016
Priority date	Sep 29, 2016
Publication date	Mar 29, 2018
Grant date	—

Abstract

Beamforming is used in wireless link communication to improve a wireless link through increased channel capacity and diversity by focusing a beam, such as from multiple antennas, in the direction of the receiver. Where the receiver may be capable of measurements relevant to beamforming, more particularly measurements that vary or are otherwise dependent upon changes in beamforming settings, reference to such measurements and corresponding beamforming settings may improve performance. In this Disclosure, a sink device transmits a data stream to a source device, wherein said data stream comprises the position of the sink device. The data stream may further comprise data such as link quality, heading information, or discretized location. The source device stores this data in a memory. When the wireless link deteriorates, the source device assesses its memory to select a candidate beamforming setting with some indicia of success, such as those that correspond closely to the sink device's position, the most recently used beamforming settings, or beamforming settings that previously resulted in a satisfactory wireless link quality.

First claim

What is claimed is:

1 . A method of wireless link control in a source device, comprising:
establishing a wireless link with a sink device; controlling the wireless link according to an applied beamforming setting; evaluating the applied beamforming setting based on a quality of the wireless link; storing an entry comprising the applied beamforming setting and a position of the sink device; selecting a candidate beamforming setting based on at least one stored entry; and controlling the wireless link to apply the candidate beamforming setting as the applied beamforming setting.

2 . A method of wireless link control in a sink device, comprising:
establishing a wireless link with a source device; determining a position of the sink device relative to the source device; determining a quality of a wireless link corresponding to the applied beamforming setting; transmitting the position of the sink device and the quality of the wireless link to the source device.

3 . The method of claim 2 , further comprising determining a quality of the wireless link corresponding to the applied beamforming setting using a Received Signal Strength Indication.

4 . The method of claim 2 , further comprising determining a quality of the wireless link corresponding to the applied beamforming setting using a Forward Error Correction Decoder.

5 . The method of claim 2 , further comprising determining a quality of the wireless link corresponding to the applied beamforming setting using a Bit Error Rate.

6 . The method of claim 2 , further comprising determining a quality of the wireless link corresponding to the applied beamforming setting using acknowledgement/non-acknowledgement counters.

7 . The method of claim 2 , further comprising the sink device transmitting the position of the sink device relative to the source device in the sink device's user traffic data.

8 . The method of claim 1 , further comprising the source device performing a beamforming training, wherein the source device:
attempts an array of beamforming settings; stores for each of one or more attempted beamforming settings, an entry comprising the beamforming setting and a quality of the wireless link corresponding to the beamforming setting; and selects a candidate beamforming setting based on at least one stored entry.

9 . The method of claim 1 , further comprising the source device selecting a candidate beamforming setting in response to a wireless link deterioration.

10 . The method of claim 9 , further comprising the wireless link deterioration being determined by assessing Received Signal Strength Indication.

9 . method of claim 9 , further comprising the wireless link deterioration being determined by assessing Forward Error Correction Decoder.

12 . The method of claim 9 , further comprising the wireless link deterioration being determined by assessing Bit Error Rate.

13 . The method of claim 9 , further comprising the wireless link deterioration being determined by assessing ACK/NACK counters.

14 . The method of claim 1 , further comprising the source device selecting a beamforming setting with the closest proximity to the current position as the candidate beamforming setting.

15 . The method of claim 2 , further comprising the determined position including at least one of:
three points on an x, y, and z plane; three degrees of rotational vectors; or six degrees of personal freedom information.

16 . The method of claim 15 , further comprising the determined position of the sink device being a discretized position.

17 . The method of claim 16 , further comprising the discretized position being discretized to an angular precision or resolution of plus or minus 5 degrees, or plus or minus 10 cm.

18 . The method of claim 1 , further comprising storing with the entry comprising the applied beamforming setting and the determined position, at least one of:
the quality of the wireless link the evaluation of the applied beamforming setting the time that the beamforming setting was applied; or the chronology of the beamforming setting with respect to an earlier applied beamforming setting.

19 . The method of any of claim 1 , wherein the source device selects a candidate beamforming setting based on having provided the best signal strength.

20 . The method of claim 1 , wherein the source device selects the candidate beamforming setting based on error rate.

21 . The method of claim 1 , further comprising employing an algorithm to search the stored entries to select a candidate beamforming setting.

22 . The method of claim 1 , further comprising the source device storing data from at least two sink devices.

23 . An apparatus for wireless link control comprising a source device, wherein the source device is configured to:
control a wireless link with a sink device according to an applied beamforming setting; evaluate the applied beamforming setting based on a quality of the wireless link; store an entry comprising the applied beamforming setting and a position of the sink device; select a candidate beamforming setting based on at least one stored entry; and control the wireless link to apply the candidate beamforming setting as the applied beamforming setting;

24 . An apparatus for wireless link control comprising a sink device, wherein the sink device is configured to:
determine a position of the sink device relative to the source device; determine a quality of a wireless link corresponding to the applied beamforming setting; and transmit the position of the sink device and the quality of the wireless link to the source device.

25 . The Apparatus of claim 24 , further comprising the sink device being a head mounted display.

Assignees

• Intel Ip Corp

Inventors

• Azogui Tal
• Frishman Yaniv
• Kuwahara Atsuo
• Harel Tom

Classifications

• H04W40/14

  based on stability · CPC title

• H04W4/023

  using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W40/20

  based on geographic position or location · CPC title

• H04W40/12

  based on transmission quality or channel quality · CPC title