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Lost call detection display pager with repeat call discrimination capability

  • US 5,572,197 A
  • Filed: 04/26/1994
  • Issued: 11/05/1996
  • Est. Priority Date: 04/26/1993
  • Status: Expired due to Fees
First Claim
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1. A radio display pager comprising:

  • receiver means for receiving from a paging station a sequence of repeat calls and non-repeat calls addressed to the radio pager, each of said repeat and non-repeat calls containing a message and a message number identifying the message, the message numbers of repeat calls containing identical messages being equal to each other;

    first memory means for storing the message numbers of calls received by the receiver means;

    second memory means;

    mismatch detector means for comparing a call currently received by the receiver means with each of the calls previously stored in the first memory means for detecting a mismatch therebetween;

    lost call detector means responsive to the detection of a mismatch by the mismatch detector means for detecting the message number of a lost call which may exist between a call currently received by the receiver means and a call stored last in the first memory means storing the detected message number into the second memory means as a lost message number, and removing from the second memory means the lost message number when a call having the same message number is received by the receiver means; and

    display means for displaying the message number which remains in said second memory means.

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