Patent ID: 9712394
Date: 2017-07-18
CPC Classifications: H04L,H04W

Claim:
1. A sensor network system provided with a plurality of sensor nodes and configured to decide a parent node for each of the plurality of sensor nodes so as to form a network topology having a tree structure using each of the plurality of sensor nodes as a node, wherein each sensor node of the plurality of sensor nodes comprises: a memory storing instructions; and a processing device configured to execute the instructions to: detect a physical quantity, generate a pre-aggregation packet that is a packet containing sensor data representing the detected physical quantity, and transmit the generated pre-aggregation packet to the parent node of the sensor node; receive pre-aggregation packets transmitted by respective child nodes owned by the sensor node, generate a post-aggregation packet containing sensor data contained by the respective received pre-aggregation packets, and transmit the generated post-aggregation packet to the parent node of the sensor node; and receive the post-aggregation packet transmitted by each of the child nodes owned by the sensor node, and transmit the received post-aggregation packet to the parent node of the sensor node, the processing device further configured to execute the instructions to form the network topology, wherein with respect to each sensor node of the plurality of sensor nodes, a number of the child nodes owned by the sensor node is within a first value range of a value obtained by multiplying a first containing number by a natural number, the first containing number being a maximum number of sensor data that one packet is configured to contain.