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Method for sending and receiving a Boolean function over a network

  • US 7,117,270 B2
  • Filed: 07/19/2002
  • Issued: 10/03/2006
  • Est. Priority Date: 08/15/2001
  • Status: Expired due to Fees
First Claim
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1. A method for transmitting predicates in a publish-subscribe network, comprising:

  • receiving an expression including Boolean-valued predicates relating to a subscription;

    encoding the expression into a message for transmission in the network for use in content-based routing wherein the encoding step includes converting the expression into a corresponding disjunctive normal form, converting the disjunctive normal form into a corresponding sequence of bit-string encodings of attribute tests, simplifying AND expressions in the disjunctive normal form to contain range filters and membership tests and translating not-equal parameters in the expression to positive form; and

    transmitting the message to at least one router in a network core in order to provide content-based routing for the subscription.

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