US 9,872,296 B2 · Techniques for beam shaping at a millimeter wave base station and a wireless device and fast antenna subarray selection at a wireless device

Abstract

Methods, systems, and devices are described for wireless communication at a user equipment (UE). A wireless communications system may improve UE discovery latency by dynamically selecting and switching beam forming codebooks at the millimeter wave base station and the wireless device. Selecting an optimal beam forming codebook may allow the wireless communication system to improve link margins between the base station without compromising resources. In some examples, a wireless device may determine whether the received signals from the millimeter wave base station satisfy established signal to noise (SNR) thresholds, and select an optimal beam codebook to establish communication. Additionally or alternately, the wireless device may further signal the selected beam codebook to the millimeter wave base station and direct the millimeter wave base station to adjust its codebook based on the selection.

Claims56

Dependent claims

A method of communications at a wireless device, the method comprising:

receiving, at the wireless device, a first signal from a millimeter wave base station, the first signal beamformed on a plurality of beamforming vectors from a first codebook;
scanning a plurality of antenna subarrays, each of the plurality of antenna subarrays comprising a different subset of a plurality of antennas of the wireless device, to identify a quality of the first signal as received by each of the plurality of antenna subarrays;
and
selecting one of the plurality of antenna subarrays based at least in part on the identified quality of the first signal as received by at least one of the plurality of antenna subarrays.

1 more element

An apparatus for wireless communications, comprising:

a processor;
memory in electronic communication with the processor;
and
instructions stored in the memory;
wherein the instructions are executable by the processor to:
receive, at a wireless device, a first signal from a millimeter wave base station, the first signal beamformed on a plurality of beamforming vectors from a first codebook;
scan a plurality of antenna subarrays, each of the plurality of antenna subarrays comprising a different subset of a plurality of antennas of the wireless device, to identify a quality of the first signal as received by each of the plurality of antenna subarrays;
and
select one of the plurality of antenna subarrays based at least in part on the identified quality of the first signal as received by at least one of the plurality of antenna subarrays.

6 more elements

A non-transitory computer-readable medium storing code for communication at a wireless device, the code comprising instructions executable to:

receive, at the wireless device, a first signal from a millimeter wave base station, the first signal beamformed on a plurality of beamforming vectors from a first codebook;
scan a plurality of antenna subarrays, each of the plurality of antenna subarrays comprising a different subset of a plurality of antennas of the wireless device, to identify a quality of the first signal as received by each of the plurality of antenna subarrays;
and
select one of the plurality of antenna subarrays based at least in part on the identified quality of the first signal as received by at least one of the plurality of antenna subarrays.

1 more element

Dependencies are inferred from the claim text.

Techniques for beam shaping at a millimeter wave base station and a wireless device and fast antenna subarray selection at a wireless device

Life of this patent

Techniques for beam shaping at a millimeter wave base station and a wireless device and fast antenna subarray selection at a wireless device

Life of this patent

Abstract

Claims56