Patent ID: 7761561

Claim:
A sensor net server connected to a management computer, a client computer, and a plurality of sensor nodes, comprising: a processing unit for configuring a logic node for a connected one of said plurality of sensor nodes; and a storage unit for storing said logic node provided with physical node use information indicating whether or not said connected sensor node is in use, and logic node use information indicating whether or not said sensor node is provided as said logic node, wherein, when a replacement request of said sensor node is received, said processing unit specifies the sensor node to be replaced from said replacement request, selects a sensor node configured as the logic node which is provided with the physical node use information indicating that said sensor node is not in use and the logic node use information indicating said sensor node is provided as a logic node from said storage unit, specifies said selected sensor node as the destination replacing sensor node in order to replace said replaced sensor node with said replacing sensor node, wherein said processing unit specifies the logic node of the replaced sensor node based on said replacement request, and outputs the configuration information of said replaced sensor node provided in said specified logic node to said replacing sensor node, wherein said processing unit, after having output the configuration information of said replaced sensor node, puts a MAC address of the logic node of said replaced sensor node to a MAC address of the logic node of said replacing sensor node in order to delete the logic node of said replacing sensor node, and wherein the management computer transmits various requests to the sensor net server, and the client computer performs various processing based on environment information measured by the sensor nodes.