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Idle mode measurement

  • US 6,731,931 B1
  • Filed: 02/16/1999
  • Issued: 05/04/2004
  • Est. Priority Date: 06/24/1998
  • Status: Expired due to Term
First Claim
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1. A method of setting signal characteristics in a cellular telecommunications system in which cells are made available to a user terminal by more than one satellite concurrently, comprising:

  • in an idle mode when no call is being made, making a plurality of cell reception measurements at a user terminal, said measurements corresponding to the quality of reception of channels transmitted over first and second communication paths via first and second satellites, respectively, the first and second satellites being in non-geosynchronous orbits;

    on changing to dedicated mode, reporting information relating to the measurements made in the idle mode to a location remote from the user terminal;

    using said measurements at said remote location as a basis for selecting one of the first and second communication paths for a calls; and

    using said measurements at said remote location as a basis for setting initial characteristics of signals transmitted to the user terminal for the call to thereby permit communication between the user terminal and the selected one of the first and second satellites.

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