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Personal information management system with paging link

  • US 5,548,814 A
  • Filed: 10/28/1992
  • Issued: 08/20/1996
  • Est. Priority Date: 02/25/1991
  • Status: Expired due to Term
First Claim
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1. A method for communicating data with portable data units, comprising the steps of:

  • providing a plurality of network nodes interconnected by a network communication link, each of the network nodes having a memory associated therewith for storing information and a transmitter associated therewith for transmitting information over a wireless communication link within a predetermined RF range about the associated network node;

    providing a receiver at each of the network nodes for receiving over the wireless communication link information from a sending one of the personal data units within the RF range of the associated network node, and storing the received information in the memory of the associated one of the network nodes;

    receiving predetermined recipient information for a predetermined recipient portable data unit at one of the network nodes;

    locating the one of the network nodes in which transmit range the predetermined recipient portable data unit is disposed, the step of locating comprising the steps of;

    storing predetermined recipient information at one of the network nodes in the associated memory,generating a paging message having associated therewith routing information as to which of the network nodes has the predetermined recipient information stored thereat,transmitting the paging message over a paging channel that has an RF range substantially greater than the transmit range of each of the network nodes,receiving the paging message over the paging channel at the recipient portable data unit,generating a Ready-to-Receive message at the recipient portable data unit, the Ready-to-Receive message having associated therewith routing information extracted from the paging message defining the one of the network nodes having the predetermined recipient information stored thereat,transmitting the Ready-to-Receive message over the wireless communication link to the one of the network nodes in whose RF range the recipient portable data trait is disposed, andthe one of the network nodes receiving the Ready-to-Receive message comprising the located the of said network nodes and transmitting a Request-to-Send message to the one of the network nodes at which the predetermined recipient information is stored, indicating that the transmitting network node is the located one of the network nodes;

    transferring the predetermined recipient information to the located one of the network nodes for storage in the associated memory thereof, andtransferring the stored predetermined recipient information to the predetermined recipient portable data unit from the transmitter associated with the located one of the network nodes over the associated wireless communication link.

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