| 摘要 |
PROBLEM TO BE SOLVED: To allow a master unit to be changed at appropriate timing in a radio communication system comprising a plurality of radio communication terminals capable of functioning as master units ans slave units.SOLUTION: A radio communication system (plant growing environment measuring system) determines a sensor communication terminal 1 functioning as a master unit at every prescribed timing among a plurality of radio communication terminals (sensor communication terminals) 1 capable of functioning as master units or slave units, obtains, per sensor communication terminal 1, its terminal state (remaining amount of its battery) respectively, and changes timing to determine the master unit on the basis of the respective terminal state (remaining amount of its battery). |
