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Method, apparatus and system for distributing multicast data

  • US 20040264463A1
  • Filed: 03/02/2004
  • Published: 12/30/2004
  • Est. Priority Date: 06/26/2003
  • Status: Active Grant
First Claim
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1. A method for distributing data multicast sent from a source addressed to a receiving terminal which does not support a multicast function via gateway, the multicast distribution method comprising the steps of:

  • detecting a data request packet sent from receiving terminal registered in a first network to the source at a first gateway located on transfer path of packet between the receiving terminal and the source;

    retaining address of the receiving terminal included in the data request packet;

    detecting registration message which the receiving terminal issued to a second network;

    sending a receive state information packet including information relating address information of the source and destination address information of data multicast sent to a second gateway located on transfer path of packet between the second network and the source;

    sending from the second gateway a distribution request packet of multicast data based on received receive state information packet to the source; and

    converting address information of multicast data packet sent from the source to address of the receiving terminal and sending it to the receiving terminal.

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