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Cell selection for airborne mobile cellular communications equipment

  • US 10,111,152 B2
  • Filed: 12/09/2015
  • Issued: 10/23/2018
  • Est. Priority Date: 12/09/2015
  • Status: Active Grant
First Claim
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1. A method of handing over responsibility for serving a wireless communication equipment from a serving cell to a target cell in a cellular telecommunications system, wherein the wireless communication equipment is situated in a first aircraft that is in-flight, wherein the method is performed by a network node of the cellular telecommunications system, the method comprising:

  • determining an aircraft position, an aircraft velocity, and an aircraft direction for the first aircraft;

    for each candidate cell of a plurality of candidate cells, using at least one of the aircraft position, the aircraft velocity, and the aircraft direction to predict a level of Doppler shift that would result from a beam directed from the candidate cell to the first aircraft;

    selecting the target cell from the plurality of candidate cells by identifying which of the plurality of candidate cells minimizes an amount of change between the predicted Doppler shift and a present Doppler shift through a candidate handover from the serving cell to the candidate cell, and selecting the identified candidate cell as the target cell, wherein the present Doppler shift results from a beam directed from the serving cell to the first aircraft; and

    signaling the target cell to prepare for a handover of responsibility for serving the wireless communication equipment.

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