Energy efficiency is an important problem in wireless sensor networks. In this paper, we consider the energy efficiency problem in a heterogeneous wireless sensor network which consists of energy-constrained sensor nodes and resource-rich relay nodes. We firstly formulate the minimum relayconnected sensor cover (MRCSC) problem for heterogeneous sensor networks. The purpose of this problem is to...

energy consumption is considered as a critical issue in wireless sensor networks (wsns). batteries of sensor nodes have limited power supply which in turn limits services and applications that can be supported by them. an efcient solution to improve energy consumption and even trafc in wsns is data aggregation (da) that can reduce the number of transmissions. two main challenges for da are: (i)...

This paper presents a wireless sensor network protocol for a car parking monitoring system. A wireless sensor network for the purpose is composed of multiple sensor nodes, a sink node, a gateway, and a server. Each of the sensor nodes is equipped with a 3-axis AMR sensor and deployed in the center of a parking space. The sensor node reads its sensor values periodically and transmits the data to...

Wireless sensor networks (WSNs), as an integral part of most Internet Things (IoT) devices, are currently proliferating providing a new paradigm emerging technologies. It is estimated that the number globally connected products will increase exponentially in next decade. Therefore, it not surprising finding applications different areas such smart homes, cities, industry, e-health, defense, secu...