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Address information registering/searching system in network system

  • US 4,996,524 A
  • Filed: 06/28/1989
  • Issued: 02/26/1991
  • Est. Priority Date: 06/30/1988
  • Status: Expired due to Fees
First Claim
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1. An address information registering/searching system in a network system in which a plurality of stations are connected to a trunk network, at least one branch network is connected to each station, and at least one node is connected to each branch network, a node address being assigned to each node, and a branch address being assigned to each branch network, suitable for transmitting data between a first node connected to a first branch network of a first station and a second node connected to a second branch network of a second station, first and second node address being assigned to said first and second nodes, and first and second branch addresses being assigned to said first and second branch networks, comprising:

  • first and second address table means each for storing a plurality of pieces of address information, each piece of address information including a node address assigned to a certain mode, a branch address assigned to a branch network to which said node is connected, and frequency data representing a search frequency of the address information, said first address table means storing address information having a high reference frequency relative to a first predetermined reference frequency and said second address table means storing address information having a low reference frequency relative to a second predetermined reference frequency;

    reading means for receiving a branch frame transmitted from said first node onto said first branch network, the branch frame including a first node address assigned to said first node as a source node address, a second node address assigned to said second node as a destination node address, and data, reading out the source node address from the branch frame and generating a first search command, and reading out the destination node address from the branch frame and generating a second search command;

    searching means for referring to said first address table means and selectively referring to said second address table means to search for first object address information in response to the first search command, the first object address information including the first node address and the first branch address, and referring to said first address table means and selectively referring to said second address table means to search for second object address information in response to the second search command, the second object address information including the second node address and the second branch address; and

    trunk transmitting means for generating a trunk frame including the first branch address written in the first object address information as a source branch address, the second branch address written in the second object address information as a destination branch address, and the branch frame and transmitting the generated trunk frame onto said trunk network.

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