دانلود مقاله SecLooCI: A comprehensive security middleware architecture for shared wireless sensor networks- انتشار 2014

اختصاصی از فی توو دانلود مقاله SecLooCI: A comprehensive security middleware architecture for shared wireless sensor networks- انتشار 2014 دانلود با لینک مستقیم و پر سرعت .

Ad Hoc Networks

Available online 14 October 2014

Jef Maerien⇑, Sam Michiels, Danny Hughes, Christophe Huygens, Wouter Joosen

Abstract

WSNs are trending towards dynamic environments that enable multiple parties to concurrently deploy and exploit multiple applications on shared nodes. The node owners want to share their nodes’ capabilities in order to increase return on investment, provide value added services, and easily share sensor node services. These concepts drive an evolving view on the software support that is required to service all stakeholders. For example, trust establishment, access control and security policy enforcement must be addressed. The node middleware must be extended to enable such shared usage of nodes while ensuring security. This paper presents the SecLooCI WSN middleware, which enables secure multi-party interactions on top of resource constrained sensor nodes. A prototype implementation for AVR Ravens running the Contiki OS shows the feasibility of the model for this low power micro-controller class of devices. This demonstrates that resource constrained sensor nodes are able to support secure node sharing.

 

Keywords

• Security middleware;
• Wireless sensor networks;
• Security;
• Shared infrastructure

دانلود مقاله Performance Evaluation of Network Coding in IEEE 802.11 Wireless Ad Hoc Networks - انتشار 2014

اختصاصی از فی توو دانلود مقاله Performance Evaluation of Network Coding in IEEE 802.11 Wireless Ad Hoc Networks - انتشار 2014 دانلود با لینک مستقیم و پر سرعت .

Ad Hoc Networks

Volume 16, May 2014, Pages 131–141

Kyu-Hwan Lee, Sunghyun Cho, Jae-Hyun Kim

Abstract
We evaluate the practical network coding (NC) gain in a wireless ad hoc networks.
First, we introduce how network coding can be applied to IEEE 802.11
ad hoc networks. Next, we find obstructive factors by which the NC gain
may decrease as compared with the theoretical NC gain. Finally, through
the performance evaluation, we analyze why a performance difference occurs
between practical and theoretical NC gains owing to the suggested obstructive
factors. According to the simulated results, even though there is some
overhead caused by the characteristics of the media access control (MAC)
protocol and control signals to apply NC to wireless ad hoc networks, the
practical NC gain is almost the same as the theoretical gain in an ideal environment
for NC. However, in the NC system with the hidden node problem,
the NC gain decreases because of packet collision. In the NC system using
a promiscuous mode where packet overhearing is possible, nodes consume
more power than the conventional system because of overhearing packets.
For instance, when the number of overhearing nodes not related to NC is set
to 15, the power reduction rate is −38.04%. Furthermore, under the network
conditions inappropriate for NC, such as asymmetric flows and scarce coding
structures, the NC gain can be considerably reduced. For example, in
5x5 and 7x7 grid topology networks, the load reduction rate by NC are only
4.12% and 7.01%, respectively. Therefore, research to solve the suggested
obstructive factors is necessary to achieve sufficient NC gain in a practicalwireless network such as an IEEE 802.11 ad hoc networks.

Keywords: Network coding, Wireless ad hoc network, Wireless LAN,
Performance evaluation.

دانلود مقاله Wireless Sensor Network Applications: A Study in Environment Monitoring System

اختصاصی از فی توو دانلود مقاله Wireless Sensor Network Applications: A Study in Environment Monitoring System دانلود با لینک مستقیم و پر سرعت .

Wireless Sensor Network Applications: A Study in Environment

International S ymposium on R obotics and Intelligent S ensors 2012 (IR IS 2012)
Monitoring System
Mohd Fauzi Othmana, Khairunnisa Shazalib*

Abstract
Development in the technology of sensor such as Micro Electro Mechanical Systems (MEMS), wireless communications, embedded
systems, distributed processing and wireless sensor applications have contributed a large transformation in Wireless Sensor Network
(WSN) recently. It assists and improves work performance both in the field of industry and our daily life. Wireless Sensor Network has
been widely used in many areas especially for surveillance and monitoring in agriculture and habitat monitoring. Environment monitoring
has become an important field of control and protection, providing real-time system and control communication with the physical world.
An intelligent and smart Wireless Sensor Network system can gather and process a large amount of data from the beginning of the
monitoring and manage air quality, the conditions of traffic, to weather situations. In this paper, we discuss and review wireless sensor
network applications for environmental monitoring. In order to implement a good monitoring system, there are several requirements to be
followed. From the studies, it has been proved to be an alternative way to replace the conventional method that uses men force to monitor
the environment. It is also proven that these approaches can improve the system performance, provide a convenient and efficient method
and can also fulfill functional requirements.

دانلود مقاله Fault-tolerant routing mechanism based on network coding in wireless mesh networks

اختصاصی از فی توو دانلود مقاله Fault-tolerant routing mechanism based on network coding in wireless mesh networks دانلود با لینک مستقیم و پر سرعت .

Title: Fault-tolerant routing mechanism based on network coding in wireless mesh networks 

Author(S) :Yuhuai Peng, Qingyang Song,Yao Yu, Fei Wang

Journal/Conference Name: Journal of Network and Computer Applications

:Volume

Year: 2013

:Issue

Pages: all

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مقاله شبکه های حسگر بی سیم و روش های انتشار اطلاعات در آن Wireless Sensor Network

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موضوعات مورد بحث :
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دروس مربوطه :
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