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Mobile telecommunications for aircraft and land based vehicles

  • US 5,557,656 A
  • Filed: 03/06/1992
  • Issued: 09/17/1996
  • Est. Priority Date: 03/06/1992
  • Status: Expired due to Term
First Claim
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1. A structural cellular telephone system using a designated plurality of radio channels, some of the channels being control channels and some of the channels being voice channels, said system havinga) a plurality of cells, each cell having a base station including a tower located proximate a center thereof,b) each base station equipped to simultaneously transmit and receive on the plurality of voice channels, and at least one control channel,c) a plurality of mobile stations operating within the cells,d) each mobile station being equipped to transmit and receive on some of the channels, ande) at least one mobile switching center connected to each of said base stations,f) said mobile switching centers including means for switching any of the mobile stations from one cell to another,g) each of the mobile stations being equipped to receive instructions from the base stations to determine selections of said channels,wherein the improvement comprises:

  • h) some of the mobile stations being on aircraft and some of the mobile stations being on land vehicles,i) some of said base stations having an air capability to transmit and receive signals on the channels in an aircraft horizontal polarized radiation,j) all said base stations having capability to transmit and receive signals on the channels in a land vertical polarized radiation,l) the voice channels to be used for aircraft horizontal polarized radiation selected from all of the voice channels, and the voice channels to be used for land vertical polarized radiation selected from all of the voice channels,m) each of the cells having a land effective transmission range from the base station,n) all cells having a base station having said air capability having an air effective transmission range which is greater than the land effective transmission range of all cells.

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