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Reliable message delivery system

  • US 5,396,537 A
  • Filed: 10/19/1992
  • Issued: 03/07/1995
  • Est. Priority Date: 09/30/1992
  • Status: Expired due to Term
First Claim
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1. A method in a communication system for reliably delivering messages to at least one portable selective call receive from a communication controller the method comprising within the communication controller, the steps of:

  • (a) storing messages comprising address cyclical redundancy codes (CRCs), and message data;

    (b) transmitting the messages over a first communication medium for reception by at least one portable selective call receiver, wherein the CRCs transmitted within the messages are unique according to corresponding message data and are used to identify the corresponding message data;

    (c) receiving a message reconciliation request from one portable selective call receiver of the at least one portable selective call receiver over a second communication medium, different than the first communication medium, the message reconciliation request identifying a predetermined address for the one portable selective call receiver;

    (d) reconciling stored messages with the one portable selective call receiver over the second communication medium using the CRCs to identify the transmitted messages to determine a reception status of the transmitted messages for the one portable selective call receiver; and

    (e) transmitting to the one portable selective call receiver, over the second communication medium, at least the message data of the transmitted messages having a reception status indicating that the one portable selective call receiver failed to receive the transmitted messages for reliably delivering messages to the at least one portable selective call receiver in the communication system.

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