The Effect of Mobility on Wireless Sensor Networks PDF Download

Author: Ibrahim Hasir
Publisher:
ISBN:
Category : Intelligent sensors
Languages : en
Pages : 55

View

Book Description

Author: Oday Dakhil Hassan Jerew
Publisher:
ISBN:
Category :
Languages : en
Pages : 260

View

Book Description
The primary aim of this thesis is to study the benefits and limitations of using a mobile base station for data gathering in wireless sensor networks. The case of a single mobile base station and mobile relays are considered.

Author: Veria Havary-Nassab
Publisher:
ISBN:
Category :
Languages : en
Pages :

View

Book Description

Author: Ankur Mukesh Mehta
Publisher:
ISBN:
Category :
Languages : en
Pages : 184

View

Book Description
The combination of mobility with wireless networks greatly expands the application space of both robots and distributed sensor networks; such a pervasive system can enable seamless integration between the digital and physical worlds. However, there are a number of issues in both robotic and wireless sensor network (WSN) fields that demand research, and their integration generates further challenges. A fundamental open problem in robotic systems is the issue of self-contained localization. Especially difficult when considering small scale flying robots, the ability to determine one's position using only on-board sensing is necessary for autonomous robots. GINA, a small wireless inertial measurement unit weighing only 1.6~g was designed to calculate the 6 degree of freedom position of a rigid body. Together with necessary software and hardware, the resulting WARPWING platform served as a highly capable and versatile flight controller for micro air vehicles (MAVs). As an open source hardware project, WARPWING further enabled other unrelated research projects by abstracting away the electronic system design. As designed, the WARPWING platform was used to control small flying robots. Rocket systems can be used to deliver microelectronic sensor nodes into low earth orbit (LEO) as tiny satellites; analysis of the mechanical parameters demonstrates the feasibility of using a small scale multistage solid fuel guided chemical rocket to deliver a small payload into an orbital trajectory given a suitable controller. Helicopters, similar to rockets, employ attitude control to effect stability and guidance, and so share similar control requirements. Off the shelf toy helicopters can be used as a mechanical airframe; replacing the control electronics with the GINA board enables the design of autonomous MAVs. Purely inertial operation of the GINA board provided stability control, but accumulated drift inhibited guidance control. To calculate position, the state estimator was augmented with additional vision-based sensors such as the VICON motion capture system or an on-board smart camera aimed at an infrared beacon. The GINA board, containing a wireless enabled processor, was also a platform for WSN research. The key design parameter in WSN systems is power consumption; minimizing energy requirements extends node and system lifetime or lowers required battery mass. A time synchronized, channel hopping (TSCH) medium access control (MAC) protocol, standardized as the IEEE 802.15.4e specification, combines time division multiple access with frequency diversity to ensure reliable, robust low power communication across environmental conditions. This TSCH protocol can be augmented with a variable data rate coding scheme at the physical (PHY) layer to further improve power saving and scalability. The environmental conditions that enable higher data rates also allow wireless communication with imprecise frequency references. A modified PHY layer with frequency offset compensation can be used to implement crystal-free radios with on-board LC oscillators. Enabling multi-hop networking to mobile MAVs required combining the previous two research thrusts. A helicopter augmented with a payload bay could deploy GINA nodes as wireless repeaters along a flight path, and communicate along them to a base station acting as its controller. The base station can be further connected to the internet; a mobile phone application was used to interface to a remote helicopter over a hybrid multi-hop path, passing downstream control commands and receiving upstream video images. To maintain the performance and reliability benefits of TSCH mesh networks in the presence of such MAV elements, the protocols designed for stationary networks were redesigned with extensions optimized for mobile nodes. This work on an integrated system as well as the separate subsystems paves the path towards networked robots. Future work can focus on system-level solutions to fully implement the vision of smart pervasive mobile swarms.

Author: David Munoz
Publisher: Academic Press
ISBN: 0080921930
Category : Technology & Engineering
Languages : en
Pages : 297

View

Book Description
This book is the definitive guide to the techniques and applications of position location, covering both terrestrial and satellite systems. It gives all the techniques, theoretical models, and algorithms that engineers need to improve their current location schemes and to develop future location algorithms and systems. Comprehensive coverage is given to system design trade-offs, complexity issues, and the design of efficient positioning algorithms to enable the creation of high-performance location positioning systems. Traditional methods are also reexamined in the context of the challenges posed by reconfigurable and multihop networks. Applications discussed include wireless networks (WiFi, ZigBee, UMTS, and DVB networks), cognitive radio, sensor networks and multihop networks. Features - Contains a complete guide to models, techniques, and applications of position location - Includes applications to wireless networks, demonstrating the relevance of location positioning to these "hot" areas in research and development - Covers system design trade-offs and the design of efficient positioning algorithms, enabling the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms David Muñoz is Director and César Vargas is a member of the Center for Electronics and Telecommunications, Tecnológico de Monterrey, Mexico. Frantz Bouchereau is a senior communications software developer at The MathWorks Inc. in Natick, MA. Rogerio Enríquez-Caldera is at Instituto Nacional de Atrofisica, Optica y Electronica (INAOE), Puebla, Mexico. - Contains a complete guide to models, techniques and applications of position location - Includes applications to wireless networks (WiFi, ZigBee, DVB networks), cognitive radio, sensor networks and reconfigurable and multi-hop networks, demonstrating the relevance of location positioning to these 'hot' areas in research and development - Covers system design trade-offs, and the design of efficient positioning algorithms enables the creation of future location positioning systems - Provides a theoretical underpinning for understanding current position location algorithms, giving researchers a foundation to develop future algorithms

Author: Subir Kumar Sarkar
Publisher: Artech House
ISBN: 1608074692
Category : Computers
Languages : en
Pages : 279

View

Book Description
Due to significant advantages, including convenience, efficiency and cost-effectiveness, the implementation and use of wireless ad hoc and sensor networks have achieved steep growth in recent years. This book presents the advances made in these popular technologies, providing expert guidance to practitioners and researchers in the field.

Author: Shafiullah Khan
Publisher: CRC Press
ISBN: 1466506067
Category : Computers
Languages : en
Pages : 549

View

Book Description
Wireless sensor networks (WSNs) utilize fast, cheap, and effective applications to imitate the human intelligence capability of sensing on a wider distributed scale. But acquiring data from the deployment area of a WSN is not always easy and multiple issues arise, including the limited resources of sensor devices run with one-time batteries. Additional WSN concerns include the external environment, routing, data aggregation, and ensuring quality of service (QoS) and security. Solutions have been developed for various types of application scenarios, but many problems still remain as open research challenges. Wireless Sensor Networks: Current Status and Future Trends covers the various issues associated with WSNs, including their structure, activities, and applications. Bringing together the contributions of researchers and experts in the field, this book explores: Applications of WSNs, data-centric storage, environmental forest monitoring, and the fundamentals of wireless body area networks Mobile medium access control (MAC) protocols, cooperative diversity sensor systems, and WSNs operating in IEEE 802.11 networks Location and position estimation in WSNs, techniques used in localization algorithms, and localization schemes Energy-centric simulation and design space exploration The fundamentals of MAC protocols and specific requirements and problems Protocols and data gathering Privacy and security issues in WSNs, solutions based on watermarking, and proposed work on intrusion detection systems (IDS) in WSNs Reviewing current trends in research and development as well as future expectations in the relevant areas, this book is a valuable reference for students, graduates, academics, researchers of computer science, and engineers, whether working in professional organizations or research institutions.

Author: Fabio Sebastiano
Publisher:
ISBN: 9789461910257
Category :
Languages : en
Pages :

View

Book Description

Author: Yang Lu
Publisher:
ISBN:
Category : Network communications
Languages : en
Pages :

View

Book Description
With the technological advances in the wireless sensor networks, there is increasing interest to connect them to the Internet to share real-time measurements from WSN nodes to "anyone, anywhere, any time." IETF (Internet Control Message Protocol) has proposed standards that will enable IPv6-based sensor networks. Recent research has studied the performance of routing protocol (and standard) working on IPv6 for WSN (i.e., RPL (Routing Protocol for Low-power and Lossy networks) and 6LowPAN (IPv6 layer over low-power wireless personal area networks (LoWPAN)) in TinyOS for statically distributed WSN and showed its comparative network performance with respect to the de facto routing protocol standard for TinyOS and WSN. This thesis extends such research effort to study the effect of node mobility on the performance of routing protocol (RPL on 6LowPAN). Original RPL implementation in TinyOS has to be modified to accommodate node mobility. Results from the experiments show that mobility does have negative effect on network latency and packet delivery ratio. In summary, we observe the pattern that the higher the speed of the mobile node, the worse the network performance. The conclusion is that the current RPL routing protocol and standard can only be used in a mobile network environment with low speed mobility. Suggestions on how to modify and improve RPL to be used in a mobile environment are listed based on my experience in implementing and evaluating RPL on a mobile sensor network.

Author: Jinpeng Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

View

Book Description
Wireless Sensor Networks (WSNs) technology is one of the building blocks ofthe Internet of Things (IoT). Due to their features of easy deployment and flexibility,they are used in many application domains. Low-Power and Lossy Networks(LLNs) are a special type of WSNs in which nodes are largely resources constrained.For LLNs, convergecast is one of the basic traffic modes, where all traffic in the networkis destined to a predefined destination called the sink. While considering theIoT application domains, convergecast is not the only traffic mode in the network.The sink needs to send commands to certain sensors to perform actions. In this application,anycast is another basic traffic mode. In anycast, the traffic from the sinkis destined to any member of a group of potential receivers in the network.Traditionally LLNs are formed by static sensor nodes and rarely change positions.Due to the strict resource constraints in computation, energy and memory ofLLNs, most routing protocols only support static network. However, mobility hasbecome an important requirement for many emerging applications. In these applications,certain nodes are free to move and organize themselves into a connectednetwork. The topology would continuously change due to the movement of nodesand radio links instability. This is a hard task for most routing protocols of LLNs toadapt rapidly to the movement and to reconstruct topology in a timely manner.The goal of this thesis is to propose an efficient mobility support for routingprotocols in LLNs. We focus on convergecast and anycast, which are the most usedtraffic modes in LLNs, in mobile network scenarios.We propose an enhancement mechanism, named RL (RSSI and Level), to supportrouting protocols in convergecast LLNs in mobility. This mechanism helps routingprotocol make faster decisions for detecting mobility and updating next-hop neighborsbut suffers from high overhead. We propose a dynamic control message managementto enhance the overhead performance of RL and implement it on top ofRouting Protocol for Low-power and Lossy network (RPL) and we named it RRD(RSSI, Rank and Dynamic). After taking into account hysteresis of the coveragezone of the transmission range of nodes, we optimized RRD. This enhanced versionis called RRD+. Based on RRD+, we proposed MRRD+ (Multiple, RSSI, Rankand Dynamic) to support multiple sinks in convergecast LLNs in mobility. ADUP(Adaptive Downward/Upward Protocol) is a routing solution that supports bothconvergecast and anycast in LLNs concurrently.We evaluated the performance of our contributions in both simulation usingCooja simulator and experiment (only for ADUP) on TelosB motes. The resultsobtained in both simulation and experiment confirm the efficiency of our routingprotocols.