| 摘要 |
A method for predicting a channel environment in a WPAN(Wireless Personal Area Network) and reserving transmission time is provided to guarantee stable multimedia transmission by increasing the reliability of data transmission through accurately predicting a channel environment. Starting a data transaction with a receiving station, a transmitting station measures a transmission distance from the receiving station(S402). The transmitting station confirms a data rate corresponding to the measured transmission distance from a predefined table(S403). Then the transmitting station measures the ARSS(Average Received Signal Strength) to determine the final data rate(S404) and compares the ARSS with a URSS(Upper bound RSS) and an LRSS(Lower bound RSS)(S405). If the ARSS is larger than or equal to the URSS, the transmitting station determines the confirmed data rate, obtained from the table, as the final data rate(S406). In case the ARSS is smaller than the URSS and larger than the LRSS, the transmitting station determines a data rate lower than the confirmed data rate as the final data rate(S407). If the ARSS is smaller than or equal to the LRSS, the transmitting station determines the lowest data rate of the table as the final data rate(S408). The transmitting station stores the determined data rate in a DRP(Distributed Reservation Protocol) IE(Information Element) and executes the next DRP reservation according to the determined data rate(S409).
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