Patent ID: 7512418

Claim:
A base station for transmitting a first signal to each of a plurality of sensor nodes, comprising: a base station controller including a first memory for storing the first signal to be transmitted to each of the plurality of sensor nodes, a first CPU connected with the first memory, a first interface controller connected with the first memory and the first CPU, and a wired communication unit for wired communication; and a base station wireless section carrying out communication with the plurality of sensor nodes, the base station wireless section including a second memory a second CPU connected with the second memory, a second interface controller connected with the second memory and the second CPU, and a wireless communication module connected to the second memory, wherein the number of the first signals stored in the second memory is smaller than the number stored in the first memory, wherein each of the sensor nodes comprises a third memory, a third CPU connected with the third memory, a third interface controller connected with the third memory and the third CPU, and a third wireless communication module connected with the third memory, and wherein the second memory is identical to the third memory. the second CPU is identical to the third CPU, the second interface controller is identical to the third interface controller, and the third wireless communication module is identical to the wireless communication module.