Scientific Context. Recently, there was a growing interest in wireless sensor technologies. Such technologies have large-scale applications such as earthquake monitoring or military applications and small-scale services such as home automation. Sensors are small devices that can generate data about the environment (for example, measure of temperature) and can used them for specific services (fo...

Heterogeneous wireless sensor network (heterogeneous WSN) consists of sensor nodes with different ability, such as different computing power and sensing range. Compared with homogeneous WSN, deployment and topology control are more complex in heterogeneous WSN. In this paper, a deployment and topology control method is presented for heterogeneous sensor nodes with different communication and se...

Recently, Internet of Things (IoT) technologies are developing technology with a variety applications. The (IoTs) is defined as network ordinary objects such TVs, smartphones, actuators and sensors that smartly connected together to enable new types communication between people things well themselves. Wireless sensor networks (WSNs) play an important part in technology. A contribution wireless ...

A web of sensor nodes consisting of randomly distributed devices, used to monitor physical or environmental conditions is termed as a wireless sensor network. Sensor nodes discover, store, analyze, and transmit the data from the surroundings to the base station. Transmission of packets is the most crucial task for the networks among all the tasks of a sensor node. But transmission of data consu...

Distributed and collaborative wireless sensor networks (WSN) plays key role in developing Smart Environment. A Smart Environment needs information about its surroundings as well as about its internal working; this information's are monitored and collected by the network of wireless sensors. The futuristic application of distributed WSN includes : Animal monitoring, Vehicle monitoring, Enemy mon...

In this paper we analyze the performance of 802.15.4 Wireless Sensor Network (WSN) and derive the queue size trade off for different modulation schemes like: Minimum Shift Keying (MSK), Quadrature Amplitude Modulation of 64 bits (QAM_64) and Binary Phase Shift Keying (BPSK) at the radio transmitter of different types of devices in IEEE 802.15.4 for WSN. It is concluded that if queue size at the...

Next generation network will consist of different types of wireless networks like WSN, Wi-Fi, WiMAX, UMTS, LTE and etc. Wireless Sensor Network (WSN) finds unique and special application as compared to the said networks because sensors are deployed in a very secret, awkward and hostile environment like battle field etc. Various wireless sensor nodes are interconnected and form a Wireless Sensor...

In the recent years, the technology of wireless sensor networks has gained a lot of importance. Wireless sensor networks are a special case of ad-hoc wireless networks. A wireless sensor network is a collection of sensor nodes that communicate through wireless links to work together to carry out functions. The sensor nodes’ basic function is to monitor the physical and environmental changes in ...

a Wireless Sensor Network is collection of sensor nodes organized in co- operative way. In node each has sensing, communication and computational capabilities. can be deployed throughout physical space, providing dense sensing quite close to phenomena. this paper there review on WSN challenges realistic situations where face the problems deployment, energy consumption, & routing protocols n...

An ad hoc network is a foundation less system . It is also called as a decentralized system in which accumulation of devices are provided with wireless communication interface. A wireless sensor network (WSN) is topographically circulated self-administering sensors. It is used to monitoring physical or ecological conditions. For example temperature, sound, weight and at the same time send the a...