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Communications system and packet structure

  • US 20050010759A1
  • Filed: 05/25/2004
  • Published: 01/13/2005
  • Est. Priority Date: 06/18/2003
  • Status: Active Grant
First Claim
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1. A communications system where a transmitter transmits, to a receiver, message data as a plurality of packets, wherein each of the packets includes a data region comprising:

  • transmission object data that is one of division portions into which the message data is divided so that each of the division portions is contained within each of the packets;

    authentication information that is used for executing substitution detection to the transmission object data; and

    control information that at least indicates what kind of a constituent of the message data the transmission object data is, wherein, when the receiver receives each of the packets, the receiver executes, using the authentication information received, a substitution detection of whether the transmission object data received is normal data that is really sent from the transmitter, and restructures the message data from the transmission object data received based on the control information received.

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