| 摘要 |
After sensor nodes are deployed, and in the case that a high load is applied to a broker node which contains individual sensor nodes, the load is distributed to a low-load broker node which receives the same semantic information. A sensor network system is configured so as to include sensor nodes which create semantic information using numeric data sensed in a defined information format; broker nodes which forward the semantic information created by the sensor nodes; and server nodes which register filter conditions for the acquired semantic information with the broker nodes. When a broker node containing sensor nodes goes into a high load state, using the registered filter conditions, the sensor network system searches for a broker node in a low load state which can forward the semantic information forwarded by the high load broker node, and switches the sensor node containment relationship from the high load broker node to the low load broker node. |
