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Call charging method in radio telephone system and radio telephone system employing the same method

  • US 5,521,968 A
  • Filed: 03/20/1995
  • Issued: 05/28/1996
  • Est. Priority Date: 04/20/1992
  • Status: Expired due to Fees
First Claim
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1. A call charging method in a radio telephone system for allowing a telephone call generated from a portable radio telephone via one of a plurality of radio controllers installed within a first telecommunication network to a second telecommunication network, said call charging method comprising the steps of:

  • receiving by said radio telephone an announcement signal from one of said plurality of radio controllers to determine a radio controller which is located nearest to said radio telephone;

    issuing by said radio telephone a position registration demand to said first telecommunication network or to said first and second telecommunication networks, when said radio telephone enters into a service area of a different radio controller;

    determining by said first telecommunication network, when said position registration demand is received whether said radio telephone is one of a plurality of terminals belonging to said first telecommunication network;

    sending by said first telecommunication network, when a radio telephone issuing a call is a terminal other than said terminals belonging to said fist telecommunication network, call charge information to said second telecommunication network;

    charging by said second telecommunication network, when said second telecommunication network has received said call charge information, said call to said radio telephone which issued said call; and

    charging by said second telecommunication network, when said second telecommunication network has not received said call charge information, said call to said first telecommunication network.

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