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Predictive access-control and routing system for integrated services telecommunication networks

  • US 4,979,118 A
  • Filed: 03/10/1989
  • Issued: 12/18/1990
  • Est. Priority Date: 03/10/1989
  • Status: Expired due to Term
First Claim
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1. A predictive system for controlling access to and for routing traffic through a network comprising nodes wherein each node is adapted to communicate with each of the other nodes, an interconnection of said nodes constituting a network topology, said system comprising:

  • a network control center having a central computer;

    a plurality of nodes in said network, each of said nodes being an intelligent, software controlled switch having a routing table;

    each node having outgoing trunk groups connected thereto and being connected via a data link to said computer in said network control center;

    each of said nodes comprising;

    (a) means to measure a current occupancy state of each of said nodes outgoing trunk groups to determine instantaneous node-to-node link occupancies and to transmit said current state of link occupancies to said network control center;

    (b) means to count each of said nodes number of attempts as source node to reach each of said other nodes as a destination node during a time interval to determine source-destination arrival rates for said interval, and to send said source-destination arrival rates to said network control center;

    a routing topology comprising a set of a priori defined routes from each node as a source to every other node as a destination, each route having one or more links between nodes in said network;

    means to predict source-destination arrival rates for a succeeding time interval based on the actual arrival rates during a current time interval;

    means to predict trunk group occupancy on each link of said network at the end of a next succeeding time interval using as inputs said instantaneous link occupancy measurements, said predicted source-destination arrival rates, said network topology, and said routing topology;

    means to calculate traffic control variables for each source-destination pair of nodes wherein said traffic control variables specify a percentage of incoming traffic to be offered to each route of each source-destination pair for the next time interval;

    means to transmit said traffic control variables to said intelligent switches for use during the next time interval; and

    said intelligent switches updating said routing tables and allocating arriving traffic among said source-destination routes according to said traffic control parameters for the next time interval.

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