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Transmission of interconnection information for next generation cordless telephone networks

  • US 5,259,021 A
  • Filed: 03/09/1993
  • Issued: 11/02/1993
  • Est. Priority Date: 04/08/1991
  • Status: Expired due to Fees
First Claim
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1. A two-way communication system having a public telephone network to portable telephone interconnection device for allocating at least one communication channel, out of a plurality of predetermined radio communication channels, among a plurality of portable telephones, said interconnection device having the capability of interconnecting a predetermined maximum number of phone lines linked with a predetermined number of a radio communication channel subset of said plurality of predetermined radio communication channels, said system comprising:

  • each of said plurality of requesting portable telephones comprising;

    transmitting means for transmitting a message representing a request to communicate on one of said radio communication channels;

    means for receiving a signal representing a time duration approximation indicating an average phone-line access wait time estimate during which time other portable telephones may communicate prior to said requesting portable telephone being allowed to communicate; and

    means for indicating said average wait time estimate; and

    said public telephone network to portable telephone interconnection device comprising;

    a predetermined corresponding plurality of transceiving means, operating over said subset, for providing communication links with said communication channel subset and said predetermined maximum number of phone lines and for interconnecting as many of said plurality of portable telephones to the public telephone network, as connectable, when one channel of said communication channel subset becomes available;

    monitoring means for monitoring said communication links of said plurality of transceiving means with said phone lines to determine an availability of portable telephones to public telephone network interconnections for approximating how long is said wait time, based on past statistics, in order to provide said average wait time estimate for apprising a requesting user of said requesting portable telephone of said approximate duration until an available communication channel out of said subset becomes free; and

    information transceiving means, operating over said one of said plurality of predetermined radio communication channels, for interconnecting said portable telephone to and responsive to said monitoring means for transmitting information to said requesting portable telephone for indicating that the number of portable telephone to public telephone network interconnections equals said predetermined maximum number of phone lines, said information including said average wait time estimate, said information transmitted over said one of said communication channels not currently linked with said predetermined number of phone lines to serve as a temporary information link for receiving said request, said information transceiving means dropping said temporary information link with said requesting portable telephone when said available communication channel of said predetermined subset of communication channels becomes available to provide said grant to communicate.

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