According to network structure, a sensor network
can be nonhierarchical, hierarchical or location based.
In this paper, we assume that sensor nodes are evenly deployed in the sensor network
and do not move after being deployed.
Different from the general wireless sensor networks
(WSNs) , a wireless sensor network
deployed on a coal mine robot consists of a number of small sensor nodes.
2013  developed a wireless sensor network
for outdoor air pollution monitoring and tested the designed prototype on the real-time basis.
Du, "Improving wireless sensor network
lifetime through power aware organization," Wireless Networks, vol.
To enhance the lifetime of network, a good MAC protocol for the wireless sensor network
must be energy efficient.
In this special issue, we concentrate mainly on security and privacy as well as the emerging applications of wireless sensor network
. It aims to bring together researchers and practitioners from wireless and sensor networking, security, cryptography, and distributed computing communities, with the goal of promoting discussions and collaborations.
In this paper, sensors are radars, and the sensor network
is built facing multisensor cross cueing.
The proposed architecture consists of Sand Level Sensor Network
, environmental monitoring node, and Gateway.
Therefore, wireless sensor network
has the sensor and micro-electromechanical and wireless communications in one of three technologies (Yang, 2016).
Libelium is a wireless sensor network
platform provider that delivers, open-source, low-power consumption devices that are easy to program and implement for Smart Cities solutions and a wide range of M2M and sensor projects.
In large sensor network
, finding optimal aggregation tree is NP-Hard problem to reduction weighted set covering problem.