| 摘要 |
PROBLEM TO BE SOLVED: To improve the connection possibility between a master station and a slave station to improve the throughput of data transmission and to reduce the power consumption of the slave station by allowing the slave station to detect the receiving field strength of a signal received from the master station and to adjust the transmission power of a signal to the master station in accordance with the detected receiving field strength. SOLUTION: When slave stations (UM) 3 receive an informative signal from a master station (CM) 1, they decide whether or not this receiving field strength is larger than a reference value, lowers the transmission power of a signal to be transmitted to the CM 1 when it is larger than the reference value and increase the transmission power of the signal to be transmitted to the CM 1 when it is smaller than the reference value. That is, the UMs 3 transmit a signal with large transmission power when the CM 1 is far away, and transmit the signal with small transmission power when the CM 1 is near to prevent the dissipation of transmission power because the receiving field strength is connected with being in inverse proportion to the square of distance. Then, the UMs 3 can perform radio communication due to a TDD procedure with power saving. |
