| 摘要 |
The present invention relates to a message transmission method and system capable of transmitting differential data, which is implemented to improve data transmission rate by transmitting only differential data between the previously transmitted data and the current transmitting data when transmitting the data from a transmitting side to a receiving side. According to the present invention, there is provided a method for transmitting differential data in a message transmission system including at least one stations for transmitting and receiving packet data to and from a transmission media by means of a media access control, and a plurality of transceivers coupled to the stations for communicating with the stations through the transmission media and performing a variety of applications by using the packet data received from the stations, wherein the differential data is data representing difference between a previously transmitted data and a current transmitted data, comprising the steps of: (a) receiving tuning channel request data including a channel ID from the plurality of transceivers; (b) generating a latest message buffer based on the channel ID received from the plurality of transceivers; (c) determining as to whether data representing a request for sending a latest message has been received from any one of the stations; (d) receiving data presenting differential data request signal from a corresponding transceiver connected to the station, in case it is determined that the data representing a request for sending a latest message has been received at step (c); (e) comparing the data received from the corresponding transceiver with message data stored in the latest message buffer; (f) generating the differential data by using different portions between each the compared data as a result of comparison at step (e); and (g) transmitting, in a multicast mode, the differential data generated at step (f) to the stations. According to the present invention, it is possible to realize the message transmission method and system capable of transmitting the differential data, in which the data transmission rate can be improved by transmitting only differential data between the previously transmitted data and the current transmitting data so that the amount of data transmission can be reduced and the data transmission load can be relieved.
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