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System for location multicasting and database management for mobile sessions in any computer subnetworks without using a home router of a home subnetwork

  • US 5,862,345 A
  • Filed: 08/15/1996
  • Issued: 01/19/1999
  • Est. Priority Date: 02/07/1996
  • Status: Expired due to Term
First Claim
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1. A mobile host for use in a computer network formed of a plurality of interconnected subnetworks which includes a home subnetwork for said mobile host and which are each connected to a respective plurality of other mobile hosts;

  • said mobile host comprising;

    means for periodically transmitting a multicast packet containing a location identifier to a respective one of the plurality of subnetworks to which the mobile host is currently attached, when said one of the subnetworks is not said home subnetwork, for delivery to said other mobile hosts that are connected to said respective one of the subnetworks without using a home router of said home subnetwork;

    means for receiving at least another multicast packet from another mobile host via said one of the subnetworks;

    a database for storing the location identifier of the received multicast packet; and

    means for transmitting a data packet to said one of the subnetworks together with a location identifier when the destination of the data packet corresponds to said stored location identifier and for transmitting said data packet without a location identifier to said one of the subnetworks when said destination has no corresponding stored location identifier.

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