Mitigating spectral emission conditions for high transmission output power during degraded antenna peak gain

Patent metadata

Field	Value
Publication number	US-11051252-B2
Application number	US-201916538533-A
Country	US
Kind code	B2
Filing date	Aug 12, 2019
Priority date	Dec 7, 2018
Publication date	Jun 29, 2021
Grant date	Jun 29, 2021

Abstract

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a memory and at least one processor coupled to the memory. The at least one processor may be configured to determine a retransmission rate associated with retransmission of one or more packets by the communications device. The at least one processor may be configured to determine a measurement associated with antenna gain of at least one antenna of the apparatus. The at least one processor may be configured to adjust a transmission power of the apparatus based on the retransmission rate and based on the measurement.

First claim

What is claimed is:

1. A communications device configured for wireless communications, the communications device comprising:
a memory; and
at least one processor coupled to the memory and configured to:
determine a retransmission rate associated with retransmissions of one or more packets by the communications device, wherein the retransmission rate is determined based on a number of the one or more packets retransmitted by the communications device or based on a number of received requests for the retransmissions of the one or more packets within a configured time period;
determine a measurement associated with an antenna gain of at least one antenna of the communications device; and
adjust a transmission power of the communications device based on the retransmission rate and based on the measurement, wherein the transmission power is adjusted by increasing the transmission power of the communications device when the retransmission rate satisfies a first threshold and when the measurement satisfies a second threshold or by decreasing the transmission power of the communications device when the retransmission rate fails to satisfy a first threshold or when the measurement fails to satisfy a second threshold.

2. The communications device of claim 1 , wherein the measurement associated with the antenna gain comprises at least one of a voltage standing wave ratio (VSWR) measurement or a decibel (dB) measurement indicating reflected radio frequency (RF) power.

3. The communications device of claim 1 ,
wherein the increased transmission power exceeds a threshold transmission power configured for the communications device based on an adjacent channel power (ACP) standard.

4. The communications device of claim 1 ,
wherein the decreased transmission power is decreased from an increased transmission power that exceeds a threshold transmission power configured for the communications device based on an adjacent channel power (ACP) standard, and the decreased transmission power is lower than the threshold transmission power.

5. The communications device of claim 1 , further comprising:
a power detection circuit configured to detect the measurement, wherein
the at least one processor is configured to determine the measurement based on activation of the power detection circuit for the detection of the measurement, and is configured to adjust the transmission power based on a correspondence between the detected measurement and the adjusted transmission power.

6. The communications device of claim 1 , further comprising:
a receiver circuit configured to detect a reflected signal via the at least one antenna, wherein
the at least one processor is configured to determine the measurement based on the reflected signal, and is configured to adjust the transmission power based on at least one of a differential error vector magnitude (DEVM) or an adjacent channel power (ACP) associated with the reflected signal.

7. The communications device of claim 1 , further comprising:
a comparator circuit configured to detect the measurement, and to deactivate an attenuator when the detected measurement satisfies a second threshold,
wherein, when the retransmission rate satisfies a first threshold, the at least one processor is configured to determine the measurement and to adjust the transmission power based on activation of the comparator circuit for the detection of the measurement and the deactivation of the attenuator.

8. The communications device of claim 1 , further comprising:
a comparator circuit configured to detect the measurement, and to increase a gain of an external power amplifier connected with the at least one antenna when the detected measurement satisfies a second threshold,
wherein, when the retransmission rate satisfies a first threshold, the at least one processor is configured to determine the measurement and to adjust the transmission power based on activation of the comparator circuit for the detection of the measurement and the increase of the gain of the external power amplifier.

9. The communications device of claim 1 , further comprising:
at least one other antenna associated with a receive chain that is different from a transmit chain associated with the at least one antenna,
wherein the at least one processor is configured to determine the measurement based on a reflected signal detected via the at least one other antenna.

10. A method of a communications device configured for wireless communications, the method comprising:
determining, a retransmission rate associated with retransmissions of one or more packets by the communications device, wherein the retransmission rate is determined based on a number of the one or more packets retransmitted by the communications device or based on a number of received requests for the retransmissions of the one or more packets within a configured time period;
determining a measurement associated with an antenna gain of at least one antenna of the communications device; and
adjusting a transmission power of the communications device based on the retransmission rate and based on the measurement, wherein the transmission power is adjusted by increasing the transmission power of the communications device when the retransmission rate satisfies a first threshold and when the measurement satisfies a second threshold or by decreasing the transmission power of the communications device when the retransmission rate fails to satisfy a first threshold or when the measurement fails to satisfy a second threshold.

11. The method of claim 10 , wherein the measurement associated with the antenna gain comprises at least one of a voltage standing wave ratio (VSWR) measurement or a decibel (dB) measurement indicating reflected radio frequency (RF) power.

12. The method of claim 10 ,
wherein the increased transmission power exceeds a threshold transmission power configured for the communications device based on an adjacent channel power (ACP) standard.

13. The method of claim 10 ,
wherein the decreased transmission power is decreased from an increased transmission power that exceeds a threshold transmission power configured for the communications device based on an adjacent channel power (ACP) standard, and the decreased transmission power is lower than the threshold transmission power.

14. The method of claim 10 , further comprising:
detecting, by a power detection circuit, the measurement, wherein
the determining the measurement is based on activating the power detection circuit for the detecting of the measurement, and the adjusting the transmission power is based on a correspondence between the detected measurement and the adjusted transmission power.

15. The method of claim 10 , further comprising:
detecting, by a receiver circuit, a reflected signal via the at least one antenna, wherein
the determining the measurement is based on the reflected signal, and the adjusting the transmission power is based on at least one of a differential error vector magnitude (DEVM) or an adjacent channel power (ACP) associated with the reflected signal.

16. The method of claim 10 , further comprising:
detecting, by a comparator circuit, the measurement; and
deactivating, by the comparator circuit, an attenuator when the detected measurement satisfies a second threshold,
wherein, when the retransmission rate satisfies a first threshold, the determining the measurement and the adjusting the transmission power is based on activating the comparator circuit for the detecting the measurement and the deactivating the attenuator.

17. The metho

Assignees

• Qualcomm Inc

Inventors

• Mofidi Mahbod
• Kolsrud Arild
• Fukuoka Yoshiro
• Bicakci Ara
• Kohlmann Michael
• Jones Steven

Classifications

• H04W52/20 Primary

  using error rate · CPC title

• H04W4/80

  Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication · CPC title

• H04B17/12

  of transmit antennas, e.g. of the amplitude or phase · CPC title

• H04W24/08

  Testing, {supervising or monitoring} using real traffic · CPC title

• H04W52/241 Primary

  taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo · CPC title