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Data communication and coherence in a distributed item tracking system

  • US 20030132855A1
  • Filed: 09/24/2002
  • Published: 07/17/2003
  • Est. Priority Date: 01/11/2002
  • Status: Abandoned Application
First Claim
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1. A method for communicating between nodes of a distributed system that tracks items, the method to be performed at a node within the distributed system, the method comprising:

  • at a first node;

    establishing a first mapping specifying associations between items and responsible nodes, wherein the first mapping specifies for at least two items different designated responsible nodes;

    receiving multiple instances of tag-read-data, each instance including information read from a tag bound to an item, the information read including a unique tag identifier read automatically from the tag, each instance also including a location of the corresponding tag and its bound item when the tag identifier was read from the tag, the multiple instances of tag-read-data collectively including information read from multiple tags bound to multiple items; and

    for each instance of tag-read-data, communicating the tag-read-data to one or more designated responsible nodes as specified by the mapping.

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