Patent ID: 9743335
Date: 2017-08-22
CPC Classifications: H04L,H04W

Claim:
1. A mobile station that communicates with a base station, the mobile station comprising: a distance calculation unit to calculate a distance between the mobile station itself and the base station; a reception power measurement unit to measure a reception power of a reception signal received from the base station; a transmission-path state determination unit to determine a transmission-path quality on a basis of a reception-power theoretical value corresponding to the distance and a reception power measured by the reception power measurement unit and select a communication parameter on the basis of the determined transmission-path quality; and a transmission processing unit to generate a transmission signal to be transmitted to the base station by using a communication parameter selected by the transmission-path state determination unit, wherein the transmission-path state determination unit retains, as candidates of the communication parameter, a first parameter, and a second parameter that is a parameter for performing communication capable of achieving a longer communication distance than communication using the first parameter, determines presence of rainfall, and selects the first parameter as the communication parameter when it is determined that there is no rainfall, the second parameter as the communication parameter when it is determined that there is rainfall, and the first parameter as the communication parameter regardless of the transmission-path quality in a maximum rain communication area that is an area in which communication with the base station is possible when there is rainfall with an assumed maximum quantity of rain.