| US 7,593,752 B2 | ||
| Sensor node, base station, and sensor network system | ||
| Koji Ara, Kodaira (Japan); Yuji Ogata, Hachioji (Japan); Shunzo Yamashita, Musasino (Japan); and Takanori Shimura, Chiba (Japan) | ||
| Assigned to Hitachi, Ltd., Tokyo (Japan) | ||
| Filed on Mar. 21, 2007, as Appl. No. 11/723,691. | ||
| Application 11/723691 is a continuation of application No. 11/208658, filed on Aug. 23, 2005. | ||
| Claims priority of application No. 2005-022375 (JP), filed on Jan. 31, 2005. | ||
| Prior Publication US 2007/0281758 A1, Dec. 06, 2007 | ||
| Int. Cl. H04M 1/00 (2006.01) | ||
| U.S. Cl. 455—561 [455/67.11] | 9 Claims |
| 1. A sensor network system, comprising:
a sensor node comprising a first sensor configured to detect at least one of data of a temperature, acceleration, and illuminance,
a first CPU for receiving first data which is at least one of data of a temperature, acceleration, and illuminance detected
by the first sensor, a first memory in which software executed by the CPU is installed, a first wireless communication module
for transmitting the first data obtained by the first sensor, and a first interface controller; and
a base station comprising a second wireless communication module for receiving the first data transmitted from the first wireless
communication module of the sensor node, a second memory for storing the data to be transmitted to the sensor node, a second
CPU for controlling the data stored in the second memory to be transmitted to the sensor node, a second sensor configured
to detect at least one of data of a temperature, acceleration, and illuminance, and a second interface controller, wherein
the first sensor, the first CPU, the first memory, the first wireless communication module and the first interface controller
are connected through a first bus, and
the second sensor, the second CPU, the second memory, the second wireless communication module and the second interface controller
are connected through a second bus,
wherein the base station has a third memory which is connected through an interface to the second memory and stores commands
to be transmitted to the sensor node,
the second memory stores a portion of the commands stored in the third memory, and
when the base station receives the first data from the sensor node, if the command to be transmitted to the sensor node is
stored in the second memory, the command stored in the second memory is transmitted to the sensor node.
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