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Mobile telephone system capable of effectively utilizing GPS information even if direct reception by a mobile telephone apparatus is difficult

  • US 20020022490A1
  • Filed: 04/20/2001
  • Published: 02/21/2002
  • Est. Priority Date: 04/20/2000
  • Status: Active Grant
First Claim
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1. A mobile telephone system comprising:

  • a mobile telephone base station (20) connected to a telephone network (40); and

    a mobile telephone apparatus (10) which comprises a first GPS unit (6) for receiving a GPS wave as a first received GPS signal to obtain position data of said mobile telephone apparatus by information processing with reference to said first received GPS signal and a radio section (3) connected to said first GPS unit for transmitting, by radio communication, the position data of said mobile telephone apparatus to said mobile telephone base station to make said mobile telephone base station inform said telephone network of the position data of said mobile telephone apparatus;

    said mobile telephone base station comprising a mobile telephone base section (22) for transmitting, by radio communication, position information of said mobile telephone base station to said mobile telephone apparatus to enable said mobile telephone apparatus to use the position information of said mobile telephone base station instead of the position data of said mobile telephone apparatus.

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