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Power-line data transmission method and system utilizing relay stations

  • US 5,835,005 A
  • Filed: 07/12/1995
  • Issued: 11/10/1998
  • Est. Priority Date: 07/13/1994
  • Status: Expired due to Fees
First Claim
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1. A power-line data transmission system in which a plurality of nodes each having a power-line communication device are connected together by an electric power line and data is transmitted between the nodes by power-line communication, each of the nodes comprising:

  • a data transmission possible/impossible information storing means for storing information indicating whether an associated node can perform data transmission with all other nodes;

    a data transmission possible/impossible judging means for judging based on the data transmission possible/impossible information whether the associated node can perform data transmission with a target station node;

    a link establishing means for establishing a direct link with the target station node when the data transmission possible/impossible judging means judges that the associated node can perform data transmission with the target station node; and

    a relay station search means for searching for a relay station node with which the associated node can perform data transmission and which can establish a link to the target station node while referring to the data transmission possible/impossible information, when the data transmission possible/impossible judging means judges that the associated node cannot perform data transmission with the target station node.

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