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Method and system for location-updating of subscriber mobile stations in a mobile radio network by a combination of mobile initiated location updating of some mobile stations and network-initiated location updating of others

  • US 5,561,840 A
  • Filed: 06/09/1994
  • Issued: 10/01/1996
  • Est. Priority Date: 05/25/1992
  • Status: Expired due to Fees
First Claim
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1. A method for location updating in a cellular radio network comprising base stations and mobile stations of a cellular system, the mobile stations having an automatic mobile station-initiated location updating, cordless base stations and cordless telephones of a cordless telephone system connected to said cellular network, the cordless telephone system having no automatic location updating, a home location register for storing location and subscriber data on all mobile and cordless subscribers of the cellular radio network, service areas each comprising a mobile services switching center and a visitor location register, the visitor location register storing location and subscriber data on those of said mobile and cordless subscribers visiting the respective service area, said location updating method comprising:

  • updating the location of cordless subscribers by a network-initiated location updating procedure, said procedure comprising;

    sending, at suitable intervals not involving call set-up, a cordless subscriber paging command from the home location register to the visitor location register indicated by the location data of the respective cordless subscriber in the home location register,paging, by the visitor location register, the respective cordless subscriber in response to said cordless subscriber paging command,updating, in response to receiving a paging response from the respective cordless telephone, the location data of the respective cordless subscriber in the visitor location register, and sending positive paging acknowledgement from the visitor location register to the home location register,erasing, in response to not receiving a paging response from the respective cordless telephone, the location data of the respective cordless telephone in the visitor location register, and sending a negative acknowledgement from the visitor location register to the home location register.

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