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Recently, several studies have considered the use of mobile sink (MS) for data gathering in wireless sensor networks. As, it can enhance lifetime of the sensor network by distributing load among the sensors. In some delay-critical applications, a mobile sink is allowed to move along a predefined path. However, due to the predefined path and relatively slower speed of mobile sink, data gathering from...
Wireless Sensor Networks (WSNs) have a wide variety military applications including battlefield surveillance, enemy tracking, and target classification. In this paper, we propose a WSN architecture based on a mobile sink. The proposed architecture differentiates the regular data from the critical data, and leverages this difference to reduce the energy consumption in WSNs. We formally modeled the...
Crowd sensing exploits users' smart devices and human mobility to collect information on a large scale. To realize a crowd sensing campaign, sensing tasks with spatio-temporal requirements are distributed to the devices that can provide the requested information. Typically, the distribution of sensing tasks relies on a centralized communication infrastructure such as cloud servers. However, such an...
Innovations in technology that have enabled efficient wireless tiny devices propelled the concept of Internet of Things. It is expected that mobile data traffic will experience 8-fold growth between 2015 and 2020 and the number of mobile connected devices will reach 11.6 billion by 2020. Main factors of this exponential growth and wide acceptance are the integration of several technologies and communications...
Data reduction is one of the most attractive way to conserve the limited energy resources of wireless sensor networks (WSNs). It aims to remove unnecessary data transmission. Therefore, data prediction and reduction mechanisms must be deployed at the source node in order to eliminate the redundant sensed data before sending them to the sink. In this paper, an energy efficient periodic distributed...
Wireless Sensor Networks (WSNs) are getting popular day by day. But due to the constrained of resources and limited battery supply of sensor nodes, this becomes the major areas of research. Earlier the LEACH protocol proposed contributes a lot in terms of reducing energy consumption among sensor nodes. Later on concept of rendezvous nodes (RZ) and mobile sink was combined with LEACH to reduce energy...
Recent advances in technology propelled the development of resource constrained tiny devices and the concept of Internet of Things (IoT). Potential applications spanning various fields of science from environmental to medical have been emerged. Different architectures, routing protocols, performance issues and goals have been suggested. In this work, we review fundamental concepts, recent developments...
Wireless sensor networks have emerged as the major criteria that enable the Internet of things evolution. They have wide application range from special domain to civilian and scientific domain thus it is attracted a lot of research. Since security is of the crucial importance of wireless sensor networks, there are existed several authentication techniques for digital right management, and watermarking...
These days wireless sensor networks are being used in many different fields. Limited energy and efficient usage of energy are the most important factors that should be considered in these networks. Node clustering increases the efficacy of the energy consumption. Each cluster has a cluster head(CH) that is a member of that cluster and its duty is sending and receiving data in the network. So finding...
Localization is a very important issue to wireless sensor networks. The sensor node requires accurate location information in order to achieve the purpose of real-time monitoring and transmission of information. The more the sensor nodes and GPS modules are used in localization, the higher the localization accuracy can achieve, but employing more sensor nodes also leads to high costs. Thus, how to...
Wireless Mesh Network (WMN) is an upcoming technology that supplements wired infrastructure with wireless backbone to provide Internet connectivity to mobile nodes (MN) or users in residential areas and offices. Here the each wireless backbone node operates both as a wireless router that forwards packets of other nodes & as a wireless bridge transmitting the packets of its clients WMN has the...
In mobile wireless sensor networks (MWSNs), each sensor has the ability not only to sense and transmit data but also to move to some specific location. Because the movement of sensors consumes much more power than that in sensing and communication, the problem of scheduling mobile sensors to cover all targets and maintain network connectivity such that the total movement distance of mobile sensors...
The widespread use of mobile devices has led to the continuous innovation of information service technology. This paper analyzes the problems of service implementation in the absence of infrastructure, and proposes a service optimization solution in wireless mobile network environment, which is designed from three levels of service deployment service framework and service optimization, and effectively...
Unattended Wireless Sensor Networks (UWSN) are usually deployed in human-hostile environments. Such architectures raise a challenge to data protection for two main reasons. First, sensors have limited capacities in terms of performance and memory, so not all cryptographic mechanisms can be applied. Moreover, the measurements cannot be immediately gathered, so they have to be kept inside the devices...
The recent advances in wireless energy transfer technology provide a promising way to solve the problem of limited battery capacity of sensor nodes in wireless sensor networks. Adoption of mobile charger in the wireless rechargeable sensor networks (WRSNs) makes it easier to charge sensor nodes rather than charging with energy harvesting schemes. However, many existing energy replenishment schemes...
Sink mobility has been proven to be an effective way for minimizing delay in data delivery and mitigating the hot spot problem in wireless sensor networks (WSNs). However, there is an impact of the path selection for the mobile sink on the data delivery delay. Hence selection of optimal number of halting positions called rendezvous points (RPs) and their locations are challenging in WSNs. In this...
Wireless sensor networks (WSN) are widely used various applications such as disaster management, search and rescue operation, wild life monitoring, remote patient monitoring, structural health monitoring etc. It provides bridge between the real physical and virtual worlds. In many scenarios, the coverage area of the WSN will be very large and a multi-hop adhoc network needs to be maintained for the...
The coverage of interest points (targets) by mobile sensors in Wireless Sensor Networks is a very important and challenging problem. As the sensors are deployed randomly, initial placements of sensors may not guarantee coverage of all targets. In this paper, we consider the problem of covering all the targets in the surveillance region by relocating a subset of the sensors with the objective of minimizing...
The paper discusses a solution to allow permanent access to a cloud for the devices in mobile wireless sensor networks. Concepts like Dew Computing DC distributes the cloud infrastructure but has a lack of mobility. Seamless connectivity for applications and services is ensured by implementing a mobility system over different access technologies relying on dynamic context-based routing mechanism in...
This paper presents an IoT (Internet of Things) system designed to allow the monitoring and control of parameters of the users' vehicles, anytime and anywhere in the world, through the Internet. The system prototype was developed and tested using an electric vehicle (EV) and the respective sensor systems. The main components of the proposed IoT system are: a Bluetooth Low Energy (BLE) intra-vehicular...
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