Adapting radios of millimeter-wave devices

• US 10,051,685 B1
• Filed: 05/22/2017
• Issued: 08/14/2018
• Est. Priority Date: 05/22/2017
• Status: Active Grant

• Current Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Original Assignee: Hewlett Packard Enterprise Development LP (Hewlett-Packard Enterprise Company)
• Inventors: Pefkianakis, Ioannis, Sur, Sanjib
• Primary Examiner(s): Trinh, Tan H
• Application Number:
  US15/601,443
• Time in Patent Office: 449 Days
• Field of Search: 455 411, 455 412, 455 69, 455522, 455424, 4552761, 455 75, 455 68, 4554141, 4554221, 455 6711, 4555621, 455 91, 455519, 342368, 370295, 370237, 370338, 370328, 375224, 375267
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/086 using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal

Abstract

Examples described herein relate to adapting a radio of a millimeter-wave device. In some such examples, the millimeter-wave device is to include a first radio to operate at a first beam direction based on a first set of channel state information (CSI). The millimeter-wave device is also to include a second radio to measure a second set of CSI. The millimeter-wave device is then to include a set of instructions to adapt the first radio to operate at an adapted beam direction based on a third set of CSI. The third set of CSI is to include a signal strength at the adapted beam direction that the millimeter-wave device is to determine based on the first set of CSI and the second set of CSI.

Claims

1. A millimeter-wave device, comprising:

a first radio to operate at a current beam direction based on a first set of channel state information (CSI) corresponding to a millimeter-wave channel; and

a second radio to measure a second set of CSI;

wherein the millimeter-wave device includes a set of instructions to;

adapt the first radio to operate at an adapted beam direction based on a third set of CSI including an adapted signal strength at the adapted beam direction that the millimeter-wave device is to determine based on the first set of CSI and the second set of CSI; and

verify one of the adapted beam direction and the adapted signal strength by probing for a feedback signal in the millimeter-wave channel in response to determining that the adapted signal strength at the adapted beam direction exceeds a predetermined threshold.

2. The millimeter-wave device of claim 1, wherein:

the first radio is a millimeter-wave radio that is to operate by beamforming; and

the first radio includes a set of phased arrays of antennas to perform beamforming.

3. The millimeter-wave device of claim 1, wherein:

the second radio is a Wi-Fi radio to operate based on an initial set of CSI; and

the second radio is to measure the second set of CSI in part by receiving the feedback signal.

4. The millimeter-wave device of claim 1, wherein:

the millimeter-wave device is to determine the adapted beam direction of the first radio based on determining a direction of maximum signal strength for the second radio.

5. The millimeter-wave device of claim 1, wherein:

the millimeter-wave device is to determine an adapted physical-layer (PHY) rate of the first radio based on mapping from the signal strength at the adapted beam direction.

6. A method comprising:

operating a first radio of a millimeter-wave device at a current beam direction of the first radio based on a first set of parameters corresponding to a millimeter-wave channel of a wireless device;

measuring, by a second radio of the millimeter-wave device, a second set of parameters corresponding to a different channel of the wireless device;

determining, based on the first set of parameters and the second set of parameters and by the millimeter-wave device, an adapted beam direction of the first radio and an adapted signal strength to the wireless device at the adapted beam direction of the first radio;

verifying one of the adapted beam direction and the adapted signal strength by probing for a feedback signal in the millimeter-wave channel in response to a determination that the adapted signal strength at the adapted beam direction exceeds a predetermined threshold; and

adapting the first radio to operate at the adapted beam direction of the first radio.

7. The method of claim 6, including:

transmitting, by the first radio, an adapted signal at the adapted beam direction.

8. The method of claim 6, including:

determining, by the millimeter-wave device and based on the second set of parameters, a spatial distribution of signal strengths corresponding to the second radio.

9. The method of claim 6, including:

determining the adapted beam direction based on identifying by the millimeter-wave device a direction of maximum signal strength corresponding to the second radio.

10. A non-transitory computer-readable storage medium, containing thereon instructions that, when executed, cause a processing resource to:

operate a millimeter-wave radio of a millimeter-wave device at a current beam direction based on a first set of parameters corresponding to a millimeter-wave channel;

measure, by a Wi-Fi radio of the millimeter-wave device, a second set of parameters corresponding to a Wi-Fi channel;

determine, based on the first set of parameters and the second set of parameters, a third set of parameters corresponding to the millimeter-wave channel of the first radio, including an adapted beam direction of the millimeter-wave radio and an adapted signal strength of an adapted millimeter-wave signal at the adapted beam direction;

verify one of the adapted beam direction and the adapted signal strength by probing for a feedback signal in the millimeter-wave channel in response to determining that the adapted signal strength at the adapted beam direction exceeds a predetermined threshold; and

adapt the millimeter-wave radio to operate based on the third set of parameters.

11. The non-transitory computer-readable storage medium of claim 10, including thereon instructions that, when executed, cause a processing resource to:

determine, based on the second set of parameters, a spatial distribution of signal strengths corresponding to the Wi-Fi channel of the Wi-Fi radio; and

determine the adapted beam direction of the millimeter-wave radio based on the spatial distribution of signal strengths corresponding to the Wi-Fi channel of the Wi-Fi radio.

12. The non-transitory computer-readable storage medium of claim 10, including thereon instructions that, when executed, cause a processing resource to:

determine the adapted signal strength of the adapted millimeter-wave signal at the adapted beam direction of the first radio, based on comparing the current beam direction of the first set of parameters to the adapted beam direction of the third set of parameters.

13. The non-transitory computer-readable storage medium of claim 10, including thereon instructions that, when executed, cause a processing resource to:

determine, based on mapping from the adapted signal strength at the adapted beam direction, an adapted physical-layer (PHY) rate for the millimeter-wave radio.

14. The non-transitory computer-readable storage medium of claim 10, wherein:

the second set of parameters includes a parameter selected from a group consisting of compressed beamforming feedback (CBF) and signal-to-noise ratio (SNR).