Radar management based on interference detected over an air interface

Patent metadata

Field	Value
Publication number	US-2021195435-A1
Application number	US-201916723765-A
Country	US
Kind code	A1
Filing date	Dec 20, 2019
Priority date	Dec 20, 2019
Publication date	Jun 24, 2021
Grant date	—

Abstract

Certain aspects of the present disclosure provide techniques for radar management based on interference detected over an air interface. A method that may be performed by a base station (BS) or a user equipment (UE) includes measuring received power at each of a plurality of receive-beams. The method may also include determining whether the measured power received at one or more of the plurality of receive-beams satisfies a threshold condition. If the measured power received at the one or more of the plurality of receive-beams satisfies the threshold condition, the method may also include selecting a directional transmit beam based on a direction of one of the one or more of the plurality of receive-beams that satisfy the threshold condition, and transmitting a radar waveform over the directional transmit beam.

First claim

1 . A method of detecting interference by a network entity, comprising:
measuring received power at each of a plurality of receive-beams; determining whether the measured power received at one or more of the plurality of receive-beams satisfies a threshold condition; if the measured power received at the one or more of the plurality of receive-beams satisfies the threshold condition:
selecting a directional transmit beam based on a direction of one of the one or more of the plurality of receive-beams that satisfy the threshold condition; and
transmitting a radar waveform over the directional transmit beam.

2 . The method of claim 1 , wherein selecting the directional transmit beam further comprises determining which of the one or more of the plurality of receive-beams, having measured power that satisfies the threshold condition, is associated with the lowest measured power relative to the other of the one or more of the plurality of receive-beams, wherein the selected directional transmit beam has the same direction as the receive-beam having the lowest measured power relative to the other of the one or more of the plurality of receive-beams.

3 . The method of claim 1 , wherein each of the plurality of receive-beams is characterized by an azimuth offset relative to the other receive-beams.

4 . The method of claim 1 , further comprising measuring the received power at each of the plurality of receive-beams during a single slot, wherein each of the plurality of receive-beams is measured contiguously and for a duration of at least two symbols.

5 . The method of claim 4 , wherein the single slot is a random access channel (RACH) slot in a time division duplex (TDD) carrier.

6 . The method of claim 5 , further comprising, if the measured power received at the one or more of the plurality of receive-beams does not satisfy the threshold condition, measuring received power at each of the plurality of receive-beams during a next RACH slot.

7 . The method of claim 4 , wherein:
the single slot comprises a plurality of symbols; the plurality of receive-beams comprise at least a first receive-beam and a second receive-beam, wherein the first receive-beam has a duration of a first two symbols of the plurality of symbols, and wherein the second receive-beam has a duration of a second two symbols of the plurality of symbols; and the directional transmit beam has a duration of a third two symbols of the plurality of symbols.

8 . The method of claim 1 , wherein measuring received power at each of the plurality of receive-beams comprises measuring a power-to-interference ratio at each of the plurality of receive-beams.

9 . The method of claim 1 , wherein the network entity is a base station (BS) or a user equipment (UE).

10 . A network entity configured to detect interference over an air interface, comprising:
a memory; and a processor, wherein the processor is communicatively coupled to the memory and configured to:
measure received power at each of a plurality of receive-beams;
determine whether the measured power received at one or more of the plurality of receive-beams satisfies a threshold condition;
if the measured power received at the one or more of the plurality of receive-beams satisfies the threshold condition, the processor is further configured to:
select a directional transmit beam based on a direction of one of the one or more of the plurality of receive-beams that satisfy the threshold condition; and
transmit a radar waveform over the directional transmit beam.

11 . The network entity of claim 10 , wherein the processor, being configured to select the directional transmit beam, is further configured to:
determine which of the one or more of the plurality of receive-beams, having measured power that satisfies the threshold condition, is associated with the lowest measured power relative to the other of the one or more of the plurality of receive-beams, wherein the selected directional transmit beam has the same direction as the receive-beam having the lowest measured power relative to the other of the one or more of the plurality of receive-beams.

12 . The network entity of claim 10 , wherein each of the plurality of receive-beams is characterized by an azimuth offset relative to the other receive-beams.

13 . The network entity of claim 10 , wherein the processor is further configured to measure the received power at each of the plurality of receive-beams during a single slot, wherein each of the plurality of receive-beams is measured contiguously and for a duration of at least two symbols.

14 . The network entity of claim 13 , wherein the single slot is a random access channel (RACH) slot in a time division duplex (TDD) carrier.

15 . The network entity of claim 14 , wherein if the measured power received at the one or more of the plurality of receive-beams does not satisfy the threshold condition, the processor is further configured to measure received power at each of the plurality of receive-beams during a next RACH slot.

16 . The network entity of claim 13 , wherein:
the single slot comprises a plurality of symbols; the plurality of receive-beams comprise at least a first receive-beam and a second receive-beam, wherein the first receive-beam has a duration of a first two symbols of the plurality of symbols, and wherein the second receive-beam has a duration of a second two symbols of the plurality of symbols; and the directional transmit beam has a duration of a third two symbols of the plurality of symbols.

17 . The network entity of claim 10 , wherein measuring received power at each of the plurality of receive-beams comprises measuring a power-to-interference ratio at each of the plurality of receive-beams.

18 . The network entity of claim 10 , wherein the network entity is a base station (B S) or a user equipment (UE).

19 . An apparatus for detecting interference, comprising:
means for measuring received power at each of a plurality of receive-beams; means for determining whether the measured power received at one or more of the plurality of receive-beams satisfies a threshold condition; if the measured power received at the one or more of the plurality of receive-beams satisfies the threshold condition:
means for selecting a directional transmit beam based on a direction of one of the one or more of the plurality of receive-beams that satisfy the threshold condition; and
means for transmitting a radar waveform over the directional transmit beam.

20 . The apparatus of claim 19 , further comprising:
means for determining which of the one or more of the plurality of receive-beams, having measured power that satisfies the threshold condition, is associated with the lowest measured power relative to the other of the one or more of the plurality of receive-beams, wherein the selected directional transmit beam has the same direction as the receive-beam having the lowest measured power relative to the other of the one or more of the plurality of receive-beams.

21 . The apparatus of claim 19 , wherein each of the plurality of receive-beams is characterized by an azimuth offset relative to the other receive-beams.

22 . The apparatus of claim 19 , further comprising means for measuring the received power at each of the plurality of receive-beams during a single slot, wherein each of the plurality of receive-beams is measured contiguously and for a duration of at least two symbols.

23 . The apparatus

Assignees

• Qualcomm Inc

Inventors

• Rimini Roberto
• Imana Eyosias Yoseph

Classifications

• H04W16/28 Primary

  using beam steering · CPC title

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04B1/3838

  Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use · CPC title

• G01S7/023

  Interference mitigation, e.g. reducing or avoiding non-intentional interference with other HF-transmitters, base station transmitters for mobile communication or other radar systems, e.g. using electro-magnetic interference [EMI] reduction techniques (auxiliary means for detecting or identifying radar signals or the like G01S7/021; means for anti-jamming G01S7/36) · CPC title

• G01S7/006

  using shared front-end circuitry, e.g. antennas (G01S13/765, G01S13/825 take precedence) · CPC title