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Communication method and communication system

  • US 20030046580A1
  • Filed: 08/07/2002
  • Published: 03/06/2003
  • Est. Priority Date: 08/07/2001
  • Status: Abandoned Application
First Claim
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1. A method of communication, comprising the steps of:

  • providing first, second, and third data processors connected to each other via a first network;

    allowing said first data processor to store a network address of said second data processor and a protocol used for communication;

    allowing said second data processor to store a device ID of said first data processor, an identification code for accessing said first data processor from outside thereof, and said protocol in corresponding manner;

    allowing said first data processor to transmit a first data packet to said second data processor under said protocol, said first data packet containing said network address of said second data processor, data indicating that said packet is an initial data packet, and said device ID of said first data processor;

    allowing said first data processor to stand by for receiving a data packet from said second data processor after transmitting said first data packet;

    allowing said second data processor to receive said first data packet under said protocol;

    if said first data packet contains said data indicating that said packet is the initial data packet, allowing said second data processor to store a network address of a source sending said first data packet contained in said first data packet and to correspond the network address of the source to correspond to said device ID, in addition to said identification code stored in correlation to said device ID contained in said first data packet;

    if said first data packet does not contain said data indicating that said packet is the initial data packet, allowing said second data processor to verify whether or not said network address contained in correlation to said device ID contained in said first data packet is identical to said network address of the source sending said first data packet, said network address of the source being contained in said first data packet;

    allowing said second data processor to stand by for receiving a second data packet to be transmitted from said third data processor to said first data processor;

    allowing said second data processor to receive said second data packet to be transmitted from said third data processor while said step of allowing said second data processor to stand by for receiving said second data packet, said second data packet containing said identification code of said first data processor and said protocol;

    allowing said second data processor to identify said network address contained in correlation to said identification code contained in said second data packet;

    allowing said second data processor to transmit said second data packet to said network address of said first data processor under said protocol;

    allowing said first data processor to receive said second data packet under said protocol; and

    allowing said first data processor to transmit another data packet to said second data processor under said protocol after a predetermined time, said another data packet containing said network address of said second data processor and said device ID of said first data processor in the like manner as said first data packet, said another data packet not containing said data indicating that said packet is the initial data packet.

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