Patent ID: 7764708

Claim:
A data transmission system for nodes connected to a network, the data transmission system comprising: a header-information adding device including: (a) a header information adding unit; and (b) a packet transmitting unit; wherein: (a) the header information adding unit adds information unique to: (i) a sending node, wherein a first data format is associated with the sending node; and (ii) a receiving node, wherein a second data format is associated with the receiving node; (b) said added information is added to a header of a transmission packet sent from the sending node to the receiving node; (c) the packet transmitting unit transmits the transmission packet; and (d) the added information includes: (i) at least one of a first device type and a first model type of the sending node; and (ii) at least one of a second device type and a second model type of the receiving node; and a data format converting device including: (a) a packet receiving unit; (b) a unique-information detecting unit; and (c) a data-format converting unit; wherein: (a) the packet receiving unit receives the transmission packet transmitted by the packet transmitting unit; (b) the unique-information detecting unit detects the information unique to the sending node and the receiving node from the header of the received transmission packet; and (c) the data-converting unit: (i) refers to information stored in memory to recognize: (A) the first data format of the sending node by using said at least one first device type and said first model type added by the header information adding unit; and (B) the second data format of the receiving node by using said at least one second device type and said second model type added by the header information adding unit; and (ii) converts the first data format of the transmission packet transmitted by the sending node into the second data format of the transmission packet received by the receiving node based on (A) said at least one first device type and said first model type added by the header information adding unit; and (B) said at least one second device type and said second model type added by the header information adding unit.