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Energy hole is regarded as one of the challenging issues in wireless sensor networks (WSNs). According to this problem, nodes that are closer to the sink lose their energy earlier than other nodes. Consequently, it leads to the early breakdown of the network. One approach for preventing this problem is to use mobile sink rather than one or more sinks with fixed positions. Also, using fuzzy logic and...
Present research work propose the design of a low energy and high throughput, hierarchical clustering based routing protocol for smart home sensor network application. Proposed protocol perform dynamic cluster head selection based on multiple node characteristics like node residual energy, node distance from sink and node average distance from neighbour nodes. Cluster head distribution is even and...
One of the major concern of Wireless Sensor Networks (WSNs) is to minimize the energy consumption of the sensor nodes. In multi-hop clustering, sensor nodes closer to the Base Station (BS) deplete their energy faster as compared to far away nodes. Transmission of own data as well as other nodes data by the nearer nodes is the prime cause for this uneven energy consumption. Hence, the nodes closer...
This paper discusses the time synchronization issue in wireless sensor networks. An event-triggered average consensus time synchronization algorithm is proposed. This algorithm uses the average time message from one node's one-hop neighbors to update the clock parameters of the node. And it achieved acceptable synchronization accuracy. We also proposed an event-trigger mechanism to reduce the communication...
Time synchronization over a distributed BLE wireless network poses several challenging problems which may affect the accuracy of time stamping of events recorded by BLE devices. In this paper, we study the accuracy of a time synchronization scheme based on generation of an event in the application program at the time of BLE connection establishment. We discuss the background of the problem, explain...
Internet of Things (IoT) has revolutionized the traditional Internet where only human-centric services were offered. It has enabled objects to have the ability to connect and communicate through the Internet. IoT has several applications such as smart water management systems. However, they require high energy-efficient sensor nodes that are able to communicate across long distance. This motivates...
Recently, the demand for wireless networks to treat periodic traffic is increasing, which includes healthcare wireless sensor networks. This tendency causes the problem of continual packet collisions among different periodic flows. In this paper, we propose a new formula for predicting whether two heterogeneous periodical flows from different source nodes have overlapping packet transfer durations...
One of the most well-known clustering methods for wireless sensor network is, no doubt, the so-called low energy adaptive clustering hierarchy (LEACH) because it is simple and easy to implement. Although LEACH tries to provide a fair selection mechanism by randomly selecting a number of sensors as the cluster-heads, it does not take into account the distribution of sensors, the main reason that LEACH...
Mobile e-health is one of the Internet of Things application that assists the healthcare organization in providing better healthcare services. Development of wireless sensor networking area has greatly increased the feasibility of a mobile e-health system since it provides wireless communication technology with promising sensor network applications. However, mobile e-health is subjected to a lot of...
In this paper, we analyze different options to use hardware-based current measurement for time synchronization of Bluetooth Low Energy (BLE) devices. The BLE devices have a specific current draw pattern based on the status of their radio. Using appropriate circuit, the changes in the current pattern can be detected. Based on this principle, we propose several different ways to tackle the time synchronization...
In a Wireless Sensor Network (WSN), there are a large number of nodes whose power supply and computational capability are limited. The nodes in a wireless sensor network can be fixed or move randomly. Thus in these networks, to forward a data packet from one node to another needs to use specific strategies with very different characteristics. Accordingly the data forwarding strategy among nodes plays...
A nodes scheduling method applying for high density and large-scale WSN is put forward by using probabilistic coverage sensing model in this paper-that is the Distributed Probabilistic Coverage Sets Configuration Method (DPCS). In this method, the nodes with dense distribution are divided into several non-overlapping coverage sets by adopting distributed self-organization method. In the process of...
Wireless Sensor Network (WSN) are spread everywhere throughout the world and are ordinarily used to gather physical data from the encompassing scene. WSN play a focal part in the Internet of Things (IoT) vision. WSN is rising as a noticeable component in the middleware connecting together the Internet of Things (IoT) and the Web of Things (WoT). But the integration of WSN to WoT brings new challenges...
Several monitoring oriented applications in Wireless Sensor Networks (WSNs) are characterized by the necessity of two data-reporting modes: time-driven and event-driven. The former is used mainly for constantly supervising an area and the latter for event detection and target tracking. By switching between both modes a WSN can improve its energy-efficiency and accuracy of measurement processes, compared...
The quality of water resources has a direct impact on the daily life of mankind and the sustainable development of society. However, with the rapid development of national industrialization, the current industrial wastewater discharge and improper handling have become more and more serious, especially for the growing domestic water pollution today, it is an urgent need for an efficient water quality...
This paper describes the design of the automated data measuring system of technical electric energy metering based on a network of autonomous wireless current sensors. The detailed information of the energy consumption of the technical object read from the proposed sensors and processed with the information part enables taking justified decisions on energy saving. The hardware of the measuring system...
A Wireless Sensor Network consists of enormous amount of sensor nodes. These sensor nodes sense the information from the sensing region and transmit to the sink. From the sink a client can access the required information. Essential part of the wireless sensor network is the sensor nodes that are driven with the batteries. Prolonging the network lifetime is very difficult and expensive in many conditions...
In this paper a data acquisition system based on wireless sensor networks to support the biomechanical gait analysis will be presented. The system is composed by sensor nodes that can be fasten to the limbs of a person. Each node contains the ESP8266 platform connected to a MPU6050 module that includes a gyroscope and an accelerometer. The system starts working in a self-adjusting (auto calibration)...
As smart embedded devices tend to become more and more ubiquitous, interconnecting these gadgets with the existing network infrastructure by using simple application layer protocols is highly needed. This article presents a new approach for a specialized web transfer protocol widely available in the Internet of Things used in conjunction with a set of newly designed wireless sensor nodes. The application...
In past years, mobile ad hoc networks (MANETs) widespread use in many applications, including for some mission-critical applications, and has become one of the major concerns such as security MANETs. MANETs due to some unique characteristics, prevention methods are not alone enough to protect them need, Therefore, the detection is possible for an attacker to breach system security, such as the need...
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