Smart max power control to mitigate excessive radiated power

Patent metadata

Field	Value
Publication number	US-11824574-B2
Application number	US-202017105222-A
Country	US
Kind code	B2
Filing date	Nov 25, 2020
Priority date	Nov 25, 2020
Publication date	Nov 21, 2023
Grant date	Nov 21, 2023

Abstract

In an exemplary embodiment, a vehicle is provided that includes an antenna and a telematics system. The telematics system is configured to be coupled to the antenna, and includes a processor that is configured to at least facilitate: determining whether power to an antenna of the vehicle would result in radiated power emissions that would exceed a regulatory requirement; and reducing power to the antenna when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement.

First claim

What is claimed is:

1. A method comprising:
determining, via location sensor data, a geographic location in which the vehicle is being operated;
determining, via the processor, a regulatory requirement for radiated power emissions for a jurisdiction associated with the geographic location;
determining a current frequency of operation of an antenna of the vehicle;
determining, via a processor of a telematics unit of a vehicle, whether power to the antenna of the vehicle would result in radiated power emissions that would exceed the regulatory requirement, based on the current frequency of the antenna and stored data regarding a magnitude of radiated power emissions associated with the current frequency in addition to the regulatory requirement radiated power emissions requirements of the jurisdiction in which the vehicle is currently located, the jurisdiction comprising one jurisdiction out of a plurality of jurisdictions through which the vehicle may travel and having different respective radiated power emissions requirements;
providing power to the antenna in accordance with a default maximum power for the current frequency of operation, via instructions provided by the processor, when it is determined that the power to the antenna would not result in radiated power emissions that would exceed the regulatory requirement; and
reducing power to the antenna, via instructions provided by the processor, when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement.

2. The method of claim 1 , further comprising:
obtaining sensor data from one or more sensors as to whether the antenna is connected to a telematics unit of a vehicle;
wherein the reducing of power to the antenna is performed only upon a further condition that the antenna is connected to the telematics unit, and wherein power to the antenna is provided in accordance with the default maximum power when the antenna is not connected.

3. The method of claim 1 , further comprising:
determining, via location sensor data obtained via a satellite-based location network, a geographic location in which the vehicle is being operated;
wherein the step of determining whether power to the antenna would result in radiated power emissions that would exceed a regulatory requirement is based on regulatory requirements of a particular jurisdiction corresponding to the geographic location; and
wherein the step of reducing power to the antenna is performed when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirements of the particular jurisdiction.

4. The method of claim 1 , wherein the step of reducing power to the antenna comprises:
reducing a maximum power limit to the antenna for a radio frequency or radio access technology (RAT) at which the telematics system is operating, when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement.

5. The method of claim 4 , wherein the step of reducing power to the antenna comprises:
reducing the maximum power limit to the antenna only for the radio frequency or RAT at which the telematics system is operating, and not for other radio frequencies/RATs, when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement.

6. The method of claim 4 , wherein the maximum power limit to the antenna is reduced by a magnitude that is determined based on a table stored in a non-transitory computer memory as to power reductions required for a particular type of the vehicle for a plurality of different combinations of radio frequencies in which the telematics unit may be operating and jurisdictions in which the vehicle may travel.

7. The method of claim 6 , wherein the table is generated based on testing in a laboratory using one or more vehicles of a same type as the vehicle with respective telematics units operating at a plurality of different radio frequencies/RATs, with antenna gain for the antenna measured at each of the plurality of frequencies/RATs.

8. A system comprising:
a non-transitory computer readable storage medium storing a computer program configured to at least facilitate:
determining, via location sensor data, a geographic location in which the vehicle is being operated;
determining, via the processor, a regulatory requirement for radiated power emissions for a jurisdiction associated with the geographic location;
determining a current frequency of operation of an antenna of the vehicle;
determining, via a processor of a telematics unit of a vehicle, whether power to the antenna of the vehicle would result in radiated power emissions that would exceed the regulatory requirement, based on the current frequency of the antenna and stored data regarding a magnitude of radiated power emissions associated with the current frequency in addition to radiated power emissions requirements of the jurisdiction in which the vehicle is currently located, the jurisdiction comprising one jurisdiction out of a plurality of jurisdictions through which the vehicle may travel and having different respective radiated power emissions requirements;
providing power to the antenna in accordance with a default maximum power for the current frequency of operation, via instructions provided by the processor, when it is determined that the power to the antenna would not result in radiated power emissions that would exceed the regulatory requirement; and
reducing power to the antenna, via instructions provided by the processor, when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement; and

a processor coupled to the non-transitory computer readable storage medium and configured to execute the program.

9. The system of claim 8 , wherein the program is further configured to at least facilitate:
obtaining sensor data from one or more sensors as to whether the antenna is connected to a telematics unit of a vehicle; and
performing the reducing of power to the antenna only upon a further condition that the antenna is connected to the telematics unit, and wherein power to the antenna is provided instead in accordance with the default maximum power when the antenna is not connected.

10. The system of claim 8 , wherein the program is further configured to at least facilitate:
determining, via location sensor data obtained via a satellite-based location network, a geographic location in which the vehicle is being operated;
determining whether power to the antenna would result in radiated power emissions that would exceed a regulatory requirement based on regulatory requirements of a particular jurisdiction corresponding to the geographic location; and

reducing power to the antenna when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirements of the particular jurisdiction.

11. The system of claim 8 , wherein the program is further configured to at least facilitate:
reducing a maximum power limit to the antenna for a radio frequency or radio access technology (RAT) at which the telematics system is operating, when it is determined that the power to the antenna would result in radiated power emissions that would exceed the regulatory requirement.

12. The system of claim 11 , wherein the program is further configured to at least facilitate:
reducing the maximum power limit to the antenna by a magnitude that is determined based on a table stored in a

Assignees

• Gm Global Tech Operations Llc

Inventors

• Oh Jang Hwan
• Knish George
• Noori Aziz U
• Mandziuk Michael Lawrence

Classifications

• H04B1/1607 Primary

  Supply circuits (converters H02M; filters therefor H02M1/14; voltage stabilisers G05F1/46) · CPC title

• H04W4/40

  for vehicles, e.g. vehicle-to-pedestrians [V2P] · CPC title

• H04W52/00

  Power management {, e.g. Transmission Power Control [TPC] or power classes} · CPC title

• H04W4/48

  for in-vehicle communication · CPC title

• H04W4/025

  using location based information parameters · CPC title