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Method for controlling transmission power and aircraft anti-collision system for implementing such a method

  • US 10,132,923 B2
  • Filed: 06/09/2016
  • Issued: 11/20/2018
  • Est. Priority Date: 06/10/2015
  • Status: Expired due to Fees
First Claim
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1. A method for controlling a transmission power of response request messages carried out by a TCAS system for preventing a collision of a first aircraft and a second aircraft, said system being of a type comprising an anti-collision apparatus with which said first aircraft is provided and a transponder with which said second aircraft is provided, said method comprising the following steps which are carried out by the anti-collision apparatus:

  • transmitting request messages in a form of radiofrequency signals which carry said messages, andreceiving radiofrequency signals which carry response messages which are transmitted by said transponder in response to the request messages,said method further comprising the following steps which are carried out by said transponder;

    receiving radiofrequency signals which carry request messages which are transmitted by said anti-collision apparatus, andtransmitting radiofrequency signals which carry response messages in response to request messages,measuring at least one value, referred to as a quality value, of a variable which represents the quality of reception by a reception channel of the radiofrequency signals which carry request messages transmitted by the anti-collision apparatus, andencapsulating data which represent said at least one quality value in said response message and,a further step, carried out by said anti-collision apparatus;

    controlling a transmission power of the radiofrequency signals which carry said request messages in accordance with the at least one quality value which is encapsulated in the response messages which are transmitted by said transponder,wherein the control step comprises;

    comparing the quality value with a threshold value,increasing the transmission power of a next request message to be transmitted when a quality represented by the quality value is less than the quality represented by the threshold value, anddecreasing the transmission power of the next request message to be transmitted when the quality represented by the quality value is greater than the quality of the threshold value,further comprising establishing aeronautical data and modifying the threshold value in accordance with values of said aeronautical data.

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