research centers


Search results: Found 25

Listing 1 - 10 of 25 << page
of 3
>>
Sort by

Article
Clustering Approach to Minimize the Consumed Energy in WSNs
النظرية العنقودية لتقليل استهلاك الطاقة في شبكات الاستشعار اللاسلكية

Author: Mohammed Saad Talib
Journal: journal of kerbala university مجلة جامعة كربلاء ISSN: 18130410 Year: 2017 Volume: 15 Issue: 2 Pages: 70-78
Publisher: Kerbala University جامعة كربلاء

Loading...
Loading...
Abstract

Saving energy or energy consumption represents the essential problem in the process of designing, deploying and operating any "wireless sensor networks" (WSN). Most of the available produced sensors depend on a "limited power supply" battery in all their operations. Most of the sensors can perform the process of sensing, "data processing" and "wireless communication". Sensors can achieve various duties in WSNs according to their wanted applications.In most applications sensors are ordered into sets called clusters according to the network objective and its requirements. Clustering achieved many advantages, so it represents the first preferable approach in designing or improving any WSN. Each cluster includes one leader sensor node known as a "cluster head" (CH) and the other sensors known as member nodes. In most applications the sensor node with higher energy is preferred to be a CH to perform the process of data transmission and data processing while those with low energy are preferred to achieve the sensing task as cluster members. Simulation being the unique tool in evaluating and estimating the performance metrics of any new designed WSN.In this study, a main effort is made to study the effect of clustering approaches on the WSNs consumed energy. Many clustering approaches is simulated and evaluated with a developed suggested clustering approach. Three approaches were suggested, built and simulated to estimate the WSNs lifetime with their important behaviors parameters. Net Logo (5.2.1) as "multi-agent programming language" is suggested to be the simulation tool in this study.

توفير الطاقة او استهلاكها هي المشكلة الاساسية في عملية تصميم ونشر شبكات الاستشعار اللاسلكي (WSN) ,فمعظم اجهزة الاستشعار المتاحة تعتمد على بطارية ذات قدرة محددة لتزويدها بالطاقة في كافة عملياتها. يمكن لجميع اجهزة الاستشعار اداء عملية معالجة البيانات, والاستشعارعن بعد و تناقل البيانات . كما ان اجهزة الاستشعار تؤدي واجبات مختلفة في شبكات الاستشعار اللاسلكي وفقاً للحاجة ونوع الشبكة. في معظم تطبيقات اجهزة الاستشعاراللاسلكية يتم ترتيبها على شكل مجموعات او عناقيد وفقاً لهدف الشبكة ومتطلباتها. حققت عملية العنقدة العديد من المزايا ولذلك اصبحت تمثل النهج والخيار الاول عند تصميم او تحسين شبكات الاستشعار اللاسلكي. كل مجموعة (عنقود) تحتوي على عقدة استشعار تسمى العقدة الرئيسية (رئيس المجموعة) والعقد الاخرى في المجموعة تسمى العقد الاعضاء. في معظم التطبيقات يفضل استخدام عقد الاستشعار ذات الطاقة العالية لتنفيذ عملية نقل ومعالجة البيانات في حين يفضل استخدام عقد الاستشعار ذات الطاقة المنخفضة لتحقيق مهمة الاستشعار وتعمل كاحد اعضاء المجموعة. المحاكاة هي الاداة الفريدة التي يمكن استخدامها في تقييم وتقدير مقاييس اداء وسلوك اي تصميم جديد لشبكات الاستشعار اللاسلكي. تناولت هذه الدراسة مناقشة تأثير اسلوب العنقدة على الطاقة المستهلكة في شبكات الاستشعار اللاسلكي. تمت محاكاة وتقييم العديد من اساليب العنقدة المتوفرة مع تطوير اسلوب عنقدة مقترح. تم اقتراح وبناء ومحاكاة ثلاثة اساليب لتقدير اعمار شبكات الاستشعار اللاسلكي مع جميع معلمات سلوكياتها. تم استخدام برنامج ال (Net Logo 5.2.1 ) كلغة برمجة" multi-agent " ليكون اداة المحاكاة في هذه الدراسة.


Article
Heterogeneous-Aware Optimization in WSN
امثلة وعي اللاتجانس في شبكات الاستشعار اللاسلكي

Author: Aseel H. Al-Nakkash اسيل حميد مجيد
Journal: Al-Ma'mon College Journal مجلة كلية المامون ISSN: 19924453 Year: 2018 Issue: 32 Pages: 248-268
Publisher: AlMamon University College كلية المامون الجامعة

Loading...
Loading...
Abstract

Enabling (Wireless Sensor Network) WSN to efficiently handling complex functions needs judicious design for the network routing protocol. Heterogeneous network was proved to be outperforming homogenous network in terms of life time. In this work, Particle Swarm Optimization (PSO) was employed to optimize the parameters that govern the heterogeneity levels ( initial energy, number of advance and intermediate nodes,….) in order to increase network stability and life time under the constraint of the cost materialized by the overall network initial energy. The proposed algorithm simulation was tested for two and three levels of heterogeneity and for two scenarios; fixed network nodes density and fixed node initial energy. The optimization results show that, the maximum network stability was achieved by increasing the nodes' initial energy to (0.6J), even that was at the cost of decreasing the number of network nodes to (61) nodes only. On the other hand, longest network life time equals to (6357) rounds can be verified when configuring some nodes in two heterogeneity levels with the maximum bound of extra energy level proposed in this work. A significant enhancement especially in network life time is noticed compared to previous protocols under the same constraints. 65% and 101% of life time are achieved for first and second scenario respectively comparing to un-optimized SEP protocol, while 68% and 24% of life time are achieved for first and second scenario respectively comparing to un-optimized SEP-E protocol.

إن تمكيين شبكات الاستشعار اللاسلكية من معالجة الوظائف المعقدة يحتاج الى تصميم عادل للبروتوكول الذي يقوم بتوجيه البيانات عبر هذه الشبكات. الدراسات السابقة أثبتت أن الشبكات الهجينة قد تفوقت في أدائها عن الشبكات المتجانسة في إطالة عمر الشبكة. في هذا العمل وظفت خوارزمية سرب الطيور للأمثلة لغرض أمثلة المعاملات التي تحكم مستوى التهجين (الطاقة الأبتدائية للمستشعرات, عدد المستشعرات المتقدمة والوسطية......) لزيادة استقرار الشبكة واطالة عمرها تحت محدد الكلفة المتثمل بالطاقة الابتدائية الكلية للشبكة. أن محاكاة الخورازمية المقترحة قد تم فحصها لمستويين وثلاثة مستويات من التهجين وبأفتراض حالتين: ثبوت العدد الكلي للمستشعرات وثبوت الطاقة الأبتدائية للمستشعرات. أن نتائج الأمثلة بينت أن أعلى قيمة للأستقرار يمكن الحصول عليها بزيادة الطاقة الأبتدائية للمستشعرات الى ( 0.6J) حتى لو كان على حساب تقليل عدد المستشعرات الكلي الى (61 ) مستشعر فقط. من جهة أخرى, أن أطول عمر للشبكة ( مساوي الى 6357 ) يمكن أن يتحقق عند المستوي الثاني للتهجين وعند زيادة الطاقة الأبتدائية لبعض المستشعرات الى القيم العليا المفروضة في هذا العمل. كما يمكن ملاحظة تحسن كبير خصوصا في عمر الشبكة بالمقارنة مع البروتوكلات السابقة تحت المحددات نفسها. 65% و 101% زيادة في عمر الشبكة قد تحقق قي الحالة الأولى والثانية على التوالي بالمقارنة مع SEP بروتوكول الغير ʼمأمثل, في حين أن 68% و 24% زيادة في عمر الشبكة قد تحقق قي الحالة الأولى والثانية على التوالي بالمقارنة مع SEP-E بروتوكول الغير ʼمأمثل.

Keywords

WSN --- Heterogeneous --- PSO --- LEACH --- SEP.


Article
Wirelessly Controlled Irrigation System

Author: Zain-Aldeen S. A.Rhman
Journal: Iraqi Journal for Electrical And Electronic Engineering المجلة العراقية للهندسة الكهربائية والالكترونية ISSN: 18145892 Year: 2014 Volume: 10 Issue: 2 Pages: 89-99
Publisher: Basrah University جامعة البصرة

Loading...
Loading...
Abstract

In the city of Basrah, there is an urgent need to use the water for irrigation process more efficiently for many reasons: one of them, the high temperature in long summer season and the other is the lack of sources fresh water sources. In this work, a smart irrigation system based wireless sensor networks (WSNs) is implemented. This system consists of the main unit that represented by an Arduino Uno board which include an ATmega328 microcontroller, different sensors as moisture sensors, temperature sensors, humidity sensors, XBee modules and solenoid valve. Zigbee technology is used in this project for implementing wireless technology. This system has two modes one manual mode, the other is a smart mode. The set points must be changed manually according to the specified season to satisfy the given conditions for the property irrigation, and the smart operation of the system will be according to these set points.

Keywords

Smart irrigation --- WSN --- Arduino Uno --- Moisture.


Article
Mitigate Congestion of Wireless Sensor Network using Genetic Algorithm

Authors: Shuruq Khalid abed-alrydi --- Hussein Attya Lafta
Journal: Journal of University of Babylon مجلة جامعة بابل ISSN: 19920652 23128135 Year: 2015 Volume: 23 Issue: 2 Pages: 536-549
Publisher: Babylon University جامعة بابل

Loading...
Loading...
Abstract

Wireless Sensor Networks(WSN) are used in many application areas such as industrial and civilian. Sensors will be shared by multiple applications to collect several types of data. Not all data be equivalence in the important, some data may be more important than other so loss this data may cause problems . Packet losses and retransmissions resulting from congestion and cause loss important data and decrease the lifetime of sensor nodes. This problem need for control to reduce the loss data, energy consuming and etc. The main aim of this paper is to discuss how can use genetic algorithm(GA) to optimize the parameters that can affect on congestion in WSN and then evaluate the performance of network used AODV,DSDV,DSR and NOAH routing protocols by using NS-2 simulator.

تستخدم المتحسسات اللاسلكية اليوم في عدة تطبيقات مثل التطبيقات الصناعية و المدنية وغيرها. يشارك المتحسس بعدة تطبيقات لتجميع عدة أنواع من البيانات. ليس كل أنواع البيانات بنفس الأهمية بعض البيانات تكون أكثر أهمية من الأخرى لذلك فقدان هذه البيانات يسبب مشاكل . فقدان البيانات وإعادة الإرسال ناتج عن الازدحام ويسبب فقدان بيانات مهمة وتقليل عمر عقدة المتحسس. هذه المشكلة تحتاج إلى سيطرة لتقليل فقدان البيانات , استهلاك الطاقة وغيرها.الهدف الرئيسي لهذا البحث هو كيف يمكن تكيف عمل الخوارزمية الجينية للحصول على أفضل قيم للمعاملات التي تؤثر في الازدحام في الشبكات المتحسسات اللاسلكية ومن ثم تقيم عمل ألشبكه للبروتوكولات AODV, DSDV,DSR و NOAH باستخدام محاكي الشبكات NS-2.

Keywords

WSN --- GA --- protocols --- AODV --- DSDV --- DSR --- NOAH


Article
Hardware Implementation of Wireless Sensor Network Using Arduino and Zigbee Protocol

Authors: Mahmood F. Mosleh --- Duaa SH. Talib
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 5 Part (A) Engineering Pages: 816-829
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

This paper presents a designed and implemented Wireless Sensor Network (WSN) based on Arduino and IEEE 802.15.4/Zigbee standards. This network consists offour end nodes; each one is connected to an individual type of sensors (lighting, temperature, motion, and distance) to form a safety network for building offices, factories, homes…etc. Also there is a fifth node in this network to collect the information from each node and send it to the base station which is a computer to be process the data and take the appropriate decision according to the program established by the user. Results confirmed that the network performs its functions with high efficiency and gave accurate readings of the surrounding circumstances. Stable reading of temperature and lighting had been achieved in the implemented network. Also, the motion and distance sensors gave good results depending onthe presence ofobjectsclose tothemore peoplemovingnear. In addition, the network is characterized by high flexibility and ease of programing that can be used to give various applications such aswarning of fire by setting a threshold level of temperature to enable an alarm when exceeding such level. It can also be used to preventtheftsbydetectingmovements ofthe humanbody with distance sensor. Inaddition, other uses can be implemented such as controlling heating and lightingdevicesin homes andotherbuildings.

Keywords

WSN --- Arduino --- IEEE 802.15.4/Zigbee


Article
Distance Estimation Based on RSSI and Log-Normal Shadowing Models for ZigBee Wireless Sensor Network

Author: Salim Latif Mohammed
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2016 Volume: 34 Issue: 15 Part (A) Engineering Pages: 2950-2959
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

In the last few years, a mobile wireless sensor and its application in wireless sensor network (WSN) are commonly used. Localization of a mobile sensor node is considered a critical issue in some WSN applications. In this paper, an outdoor environments experiment was carried out to measure the distance between the mobile node and the coordinator node in a simple point-to-point ZigBee WSN. The distance was determined based on the measured Received Signal Strength Indicator (RSSI) of the mobile node by the coordinator node. In addition, a Log-Normal Shadowing Model (LNSM) was derived for outdoor condition. Moreover, the parameters of the propagation channel such as standard deviation and a path loss exponent were estimated. The RSSI was measured and analysed for outdoor environments for a distance range 1-100 m. The measurements were carried out by using 2.4 GHz ZigBee wireless protocol based on XBee series 2 modules. The results disclosed that the mean absolute error (MAE) of 3.44 and 6.72 m for a distance range 0-65 m and 0-100 m, respectively. These results point that the LNSM is only suited for short distance.

Keywords

Distance estimation --- LNSM --- RSSI --- WSN --- ZigBee.


Article
Performance Evaluation of IEEE 802.15.4 Based Wireless Sensor Network for Small-Scale Application

Authors: Ziyad K. Farej --- Ali M. Abdul-hameed
Journal: Tikrit Journal of Engineering Sciences مجلة تكريت للعلوم الهندسية ISSN: 1813162X 23127589 Year: 2017 Volume: 24 Issue: 3 Pages: 26-33
Publisher: Tikrit University جامعة تكريت

Loading...
Loading...
Abstract

This paper evaluates the performance of IEEE 802.15.4 standard Wireless Sensor Networks (WSN) in star topology small scale applications. The performance of the network is analyzed in terms of end to end delay, maximum throughput and number of network devices with respect to payload. This analysis which is devoted for biomedical application is performed theoretically and compared with practical analysis using the network simulator Opnet modeler (version 14.5) in order to validate theoretical analysis.


Article
Design of Oil Pipeline Monitoring System based on Wireless Sensor Network

Authors: Faez F. Shareef --- Waleed F. Shareef --- Nasheed F. Mossa
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2018 Volume: 18 Issue: 2 Pages: 53-62
Publisher: University of Technology الجامعة التكنولوجية

Loading...
Loading...
Abstract

The oil export industry dominates the economy of the world and itdepends heavily on oil pipelines. Exposed pipelines are prone to malfunctioningdue to intentional or unintentional tampering and vandalism, which is usuallycaused by damaging form of either knocking or drilling. Continuous structurehealth monitoring (SHM) of pipelines using conventional methods is difficultand expensive due to the extensive length of the pipelines and the harshenvironment. Recent development in printed electronic circuits andmicrocontrollers open new possibilities in the field of monitoring and haveproven their practicality in vibration monitoring process. This paper presents amonitoring system for pipeline heal of the structure based on the wirelesssensor network. The system senses the pipeline vibration and relays the data toa base station for the procession. A WSN consists of three nodes is designed andimplemented. Each node is built around 32-bit ARM core microcontroller, andequipped with an accelerometer to measure the pipeline vibration. Themeasurements of each sensor are collected wirelessly through ZigBee protocolto a base station. Results on a 2 m pipeline sample show the ability of thesystem to precisely detect damaging events e.g. knocking and drilling to thepipeline.


Article
Encryption of Data Transmitted Through Structure-free Wireless Sensor Networks

Authors: Zainab Shaker --- KhaldunI.Aref --- Hussain Kamel Chaiel
Journal: Journal of Education for Pure Science- University of Thi-Qar مجلة التربية للعلوم الصرفة- جامعة ذي قار ISSN: 20736592 Year: 2018 Volume: 8 Issue: 2 Pages: 245-260
Publisher: Thi-Qar University جامعة ذي قار

Loading...
Loading...
Abstract

AbstractRecently, the technology has been developed and wireless networks have received greatinterest in drawing the world's attention to the family. Wireless sensor networks are a set of sensornodes specific resources that collaboratively working on the transfer or follow differentphenomena(Chemical and physical) such as (sound, heat ... etc) and then transmit the informationmonitored wirelessly by connecting sensor nodes with each other until they reach the base station.There are two types of building mechanisms for wireless sensor network (WSN);structure-based andstructure-free. The first is suffering from many problems which can be overcome when dealing withthe other type. Most of the environments that deal with wireless sensor networks are difficult toreach and dangerous. Therefore, they are subject to many security breaches. These violations canlead to severe consequences and difficult to deal with in case they occur. Therefore, security must beprovided through the network in one way or another taking into account that achieving securitythrough the network is not easy because of the resources identified, especially as the security is themain issue and the first in many applications.In this paper, the structure-free typeis applied and in order to achieve security, data transmittedthrough the network is encrypted using the Elliptic Curves Diffie-Hellman(ECDH) and the Rivest-Shamir-Adleman(RSA) algorithms.Simulation results demonstrate that the power consumption of thestructure-free wireless sensor network with data encrypted by ECDH and RSAalgorithms.The resultsshow that the power consumption by ECDH algorithm is better that RSA type with nearly 13%.

الخلاصةفي الآونة الاخیرة تطورت التكنلوجیا ولاقت شبكات الاستشعار اللاسلكیة اھتماما بالغا لفت انتباه العالم بأسرة . انھا عبارةعن مجموعة من عقد الاستشعار محددة الموارد (الطاقة والذاكرة ... الخ) التي تعمل بشكل تعاوني على نقل او متابعة الظواھرالمختلفة (الفیزیائیة او الكیمیائیة المحددة) مثل (الصوت والحرارة ... الخ) من ثم نقل تلك المعلومات المرصودة لاسلكیا من خلالتواصل عقد الاستشعار مع بعضھا البعض لحین وصولھا الى المحطة الاساسیة . ھناك نوعین من الیات بناء شبكات الاستشعاراولھما یعاني من العدید من المشاكل والتي یمكن تجاوزھا عند التعامل مع .structure- free و structure- based اللاسلكیة ھماالنوع الاخر . اغلب البیئات التي تتعامل شبكات الاستشعار اللاسلكیة صعبة الوصول وخطیرة لذا فھي معرضة للعدید من الخروقاتالامنیة وھذه الخروقات قد تؤدي الى نتائج وخیمة وصعبة المعالجة في حال حدوثھا لذا ولابد من توفیر الامن خلال الشبكة بطرقةاو بأخرى مع الاخذ بعین الاعتبار ان تحقیق الامن خلال الشبكة لیس بالھین مطلقا بسبب الموارد المحددة . خصوصا وان قضیةتحقیق الامن ھي القضیة الاساسیة والاولى في العدید من التطبیقات.ولغرض تحقیق الامن تم تشفیر البیانات المنقولة خلال الشبكة باستخدام structure-free خلال ھذا البحث تم العمل على مبدأتستخدم اختبارات المحاكاة الحاسوبیة لإظھا .Rivest-Shamir-Adleman و Elliptic Curves Diffie-Hellman خوارزمیةعند تشفیرالبیانات المنقولة خلال الشبكة بواسطة خوارزمیة structure-free wireless sensor network راستھلاك الطاقة فيتم .RSA أفضلبنسبة ۱۳ ٪ تقریبا مقارنتا مع خوارزمیة ECDH وأظھرتالنتائجأناستھلاكالطاقةفي خوارزمیة .ECDH,RSAخلال المحاكاة . MATLAB R2017-a استخدام

Keywords

Keywords:WSN --- Base Station --- Encryption --- RSA --- ECDH


Article
PCA Classification of vibration signals in WSN based oil pipeline monitoring system

Authors: Waleed F. Shareef --- Nasheed F. Mossa
Journal: Journal of Al-Qadisiyah for Computer Science and Mathematics مجلة القادسية لعلوم الحاسوب والرياضيات ISSN: 20740204 / 25213504 Year: 2019 Volume: 11 Issue: 1 Pages: Comp Page 60-71
Publisher: Al-Qadisiyah University جامعة القادسية

Loading...
Loading...
Abstract

Using wireless sensor network technology in structure health monitoring applications results in generating large amount of data. To sift through this data and extract useful information an extensive data analysis should be applied. In this paper, a Wireless Sensor Network (WSNs) is proposed for the oil pipeline monitoring system with proposed method for event detection and classification. The method depends on the Principal Component Analysis (PCA). It applied to features extracted from vibration signals of the monitored pipeline. These vibration signals are collected while applying damage events (knocking and drilling) to the oil pipeline. PCA is applied to features extracted from both time domain and frequency domain. The results manifest that this method is able to detect the existence of damage and also to distinguish between the different levels of harmful events applied to the pipeline.

Listing 1 - 10 of 25 << page
of 3
>>
Sort by
Narrow your search

Resource type

article (25)


Language

English (25)


Year
From To Submit

2019 (1)

2018 (7)

2017 (7)

2016 (4)

2015 (1)

More...