Communication device and method for echo signals management

Patent metadata

Field	Value
Publication number	US-11575411-B2
Application number	US-202117412501-A
Country	US
Kind code	B2
Filing date	Aug 26, 2021
Priority date	Sep 21, 2018
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

A communication device includes a donor receiver that receives a plurality of first beam of input radio frequency (RF) signals. The communication device further includes a service transmitter that transmits a plurality of second beam of RF signals in a first radiation pattern to a user equipment (UE). The communication device further includes control circuitry that detects an amount and a direction of reflected RF signals at the donor receiver. The control circuitry applies polarization to the plurality of second beam of RF signals and calibrates the polarization to minimize the reflected RF signals at the donor receiver. A second radiation pattern is generated for the plurality of second beam of RF signals and communicated to the UE based on the calibrated polarization.

First claim

What is claimed is:

1. A communication device, comprising:
a donor receiver (Rx) configured to receive a plurality of first beam of input radio frequency (RF) signals;
a service transmitter (Tx) configured to transmit a plurality of second beam of RF signals in a first radiation pattern to a user equipment (UE); and
control circuitry configured to:
detect an amount and a direction of reflected RF signals at the donor Rx in an environment surrounding the communication device;
apply polarization to the plurality of second beam of RF signals transmitted to the UE;
calibrate the polarization of the plurality of second beam of RF signals;
generate a second radiation pattern different from the first radiation pattern for at least the plurality of second beam of RF signals based on a frequency ripple of a radio channel and the amount and the direction of the reflected RF signals in the environment detected at the donor Rx; and
control communication of the at least the second beam of RF signals in the generated second radiation pattern via the service Tx to the UE based on the calibrated polarization.

2. The communication device of claim 1 , wherein the communication device is at least one of a repeater device, a RF signal booster device, an Evolved-universal terrestrial radio access-New radio Dual Connectivity (EN-DC) device, a New Radio (NR)-enabled relay node, or a mmWave-enabled communication device.

3. The communication device of claim 1 , wherein the control circuitry is further configured to monitor a radio channel that comprises measurement of a frequency ripple of the radio channel and a transmitter signal strength indicator (TSSI).

4. The communication device of claim 1 , wherein the control circuitry is further configured to detect a loop gain based on a measured frequency ripple of the radio channel and a transmitter signal strength indicator (TSSI), wherein the loop gain indicates a current system state of the communication device that is at least one of a stable system state, a quasi-stable system state, or an unstable system state.

5. The communication device of claim 4 , wherein the control circuitry is further configured to:
adjust a forward gain related to the service Tx from a first level to a second level; and
detect a change in the amount and the direction of reflected RF signals from the environment at the donor Rx based on the adjusted forward gain; and
re-calibrate the polarization in accordance to the detected change in the amount and the direction of reflected RF signals to reduce the reflected RF signals at the donor Rx.

6. The communication device of claim 5 , wherein the control circuitry is further configured to reduce the forward gain to lower the loop gain towards less than or equal to zero decibels (dB) based on the unstable system state, wherein the current system state of the communication device is restored to the quasi-stable system state from the unstable system state based on the reduction in the forward gain.

7. The communication device of claim 5 , wherein the control circuitry is further configured to reduce the forward gain to lower the loop gain to less than zero decibels (dB) based on the quasi-stable system state of the communication device,
wherein the current system state of the communication device is restored to the stable system state from the quasi-stable system state based on the reduction in the forward gain and an echo suppression operation at the communication device, and
wherein the echo suppression operation comprises a change in a radiation pattern of one or more beams of RF signals transmitted from the service Tx that includes the second beam of RF signals and re-calibration of the polarization to minimize the signals that are reflected back to the donor Rx.

8. The communication device of claim 5 , wherein, in the stable system state of the communication device, the control circuitry is further configured to adjust the forward gain such that the second radiation pattern of at least the second beam of RF signals is optimized for maximization of a coverage and minimization of the reflected RF signals.

9. The communication device of claim 1 , wherein the reflected RF signals corresponds to RF signals which are previously transmitted by the service Tx and re-appears at the donor Rx.

10. The communication device of claim 1 , wherein the generated second radiation pattern corresponds to a wide beam pattern in an event the amount of reflected RF signals is zero.

11. A method, comprising:
in a communication device that includes a donor receiver (Rx), a service transmitter (Tx), and control circuitry:
receiving, by the donor Rx, a plurality of first beam of input radio frequency (RF) signals;
transmitting, by the service Tx, a plurality of second beam of RF signals in a first radiation pattern to a user equipment (UE);
detecting, by the control circuitry, an amount and a direction of reflected RF signals at the donor Rx in an environment surrounding the communication device; applying, by the control circuitry, polarization to the plurality of second beam of RF signals transmitted to the UE;
calibrating, by the control circuitry, the polarization of the plurality of second beam of RF signals at the donor Rx;
generating, by the control circuitry, a second radiation pattern for at least the plurality of second beam of RF signals based on the calibrated polarization of the plurality of second beam of RF signals, a frequency ripple of a radio channel and according to the amount and the direction of the reflected RF signals in the environment detected at the donor Rx; and
controlling, by the control circuitry, communication of the at least the second beam of RF signals in the generated second radiation pattern via the service Tx to the UE based on the calibrated polarization.

12. The method of claim 11 , further comprising monitoring, by the control circuitry, a radio channel that comprises measurement of a frequency ripple of the radio channel and a transmitter signal strength indicator (TSSI).

13. The method of claim 11 , further comprising detecting, by the control circuitry, a loop gain based on a measured frequency ripple of the radio channel and a transmitter signal strength indicator (TSSI), wherein the loop gain indicates a current system state of the communication device that is at least one of a stable system state, a quasi-stable system state, or an unstable system state.

14. The method of claim 13 , further comprising:
adjusting, by the control circuitry, a forward gain related to the service Tx from a first level to a second level; and
detecting, by the control circuitry, a change in the amount and the direction of reflected RF signals from the environment at the donor Rx based on the adjusted forward gain; and
re-calibrating, by the control circuitry, the polarization in accordance to the detected change in the amount and the direction of reflected RF signals to reduce the reflected RF signals at the donor Rx.

15. The method of claim 14 , further comprising reducing, by the control circuitry, the forward gain to lower the loop gain towards less than or equal to zero decibels (dB) based on the unstable system state, wherein the current system state of the communication device is restored to the quasi-stable system state from the unstable system state based on the reduction in the forward gain.

16. The method of claim 14 , further comprising reducing, by the control circuitry, the forward gain to lower the loop gain to less than zero decibels (dB) based on the quasi-stable system state of the communication device,
wherein the

Assignees

• Movandi Corp

Inventors

• Rofougaran Ahmadreza
• Rofougaran Maryam
• Gharavi Sam
• Zou Qiyue “Jack”
• Wang Alan
• Shirinfar Farid
• Boers Mike

Classifications

• H04W76/15

  Setup of multiple wireless link connections · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04B7/086

  using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming · CPC title

• H04B7/1555

  Selecting relay station antenna mode, e.g. selecting omnidirectional -, directional beams, selecting polarizations · CPC title

• H04W52/42

  in systems with time, space, frequency or polarisation diversity · CPC title