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Power efficient paging for mobile users in a terrestrial and satellite communications system

  • US 5,910,777 A
  • Filed: 01/22/1997
  • Issued: 06/08/1999
  • Est. Priority Date: 01/22/1997
  • Status: Expired due to Fees
First Claim
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1. In a mobile communication system in which a ground station communicates data with mobile stations at a message transmission energy level, a power efficient method of paging a mobile station from the ground station comprising the steps of:

  • a) assigning a unique digital address to each mobile station;

    b) mapping each unique digital address into a unique member of an orthogonal signal set;

    c) transmitting the unique member of the orthogonal signal corresponding to the mobile being paged to some or all mobile stations at a paging energy level lower than the message transmission energy level, andd) each mobile station correlating a received orthogonal signal set against the orthogonal function corresponding to its address using a correlator for identifying the orthogonal function, whereby a page is recognized by signal detection without the need for message decoding.

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