Yüksek Lisans Tezleri
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/15956
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Master Thesis Design, implementation and evaluation of a low energy consumption method for wireless sensor networks(2014) Sarhan, Khalid JamelThe aim of this thesis is to save the energy of the nodes. The first goal of this thesis is to reduce the total energy consumption of the wireless sensor network. The second goal is to increase the reliability of the protocol along with improving the network latency as compared with previous cluster-based protocols. The network area is divided to four region. First region send information directly to base station. Second region has cluster heads and this cluster heads collect information and then send to rechargeable sensor and then this sensor send to base station. These cluster heads are selected on the basis of a probability. The third region has rechargeable node and this sensor collect information and then send to base station. Fourth region (same second region) has cluster heads and this cluster heads collect information and then send to rechargeable sensor and then this sensor send to base station. Proposed protocol performance is compared with LEACH (Low Energy Adaptive Clustering Hierarchy). The performance of proposed method is overcome than the previous works.Master Thesis Comparison of consensus algorithms in wireless sensor networks(2019) Sulaiman, AbdulmajeedKablosuz sensör ağları geniş bir uygulama yelpazesinde, çok farklı türden veriyi takip etmek için kullanılmaktadır. Yakın gelecekte, Nesnelerin Interneti kavramının geniş kabulü ile kullanım alanı daha da artacak olan bu ağlarda önemli problemlerden biri de ağdaki sensörlerin takip edilen değerler konusunda hemfikir olmalarını sağlamaktır. Bu amaca yönelik olarak farklı uzlaşı algoritmaları geliştirilmiştir. Bu algoritmalar, düşük hesaplama karmaşıklığı, hızlı yakınsama, düşük enerji sarfiyatı gibi farklı kriterleri sağlamayı amaçlamaktadırlar. Bunun yanı sıra, hareketli otonom cihazların belli bir noktada buluşmaları gibi başka alanlarda da uzlaşı algoritmaları kullanılmaktadır. Bu tezde amacımız, farklı kriterlere göre tasarlanmış uzlaşı algoritmalarının benzetimler ışığında karşılaştırmalarını sunmak, ve kullanım alanlarına göre her birinin diğerlerine göre avantajlarını ve dezavantajlarını ortaya çıkarmaktır.Master Thesis An efficient energy scheme for hybrid clustering wireless sensor networks(2015) Saleem, Ahmed M.Kablosuz algılayıcı ağlarda kümeleme, enerji optimizasyonu için birçok uygulamalarda kullanılmakta olan önemli yöntemlerden biridir. Ağlarda birçok düğüm olduğundan, kümeleme yöntemleri ile uyarlanabilir enerji tüketimini sağlamak amaçlanmaktadır. LEACH rastgele kümelenme metoduna dayanan en popüler kümeleme algoritmalarından biridir. Bu algoritmada küme başı ve küme üyeleri olmak üzere iki farklı düğüm tipi bulunmaktadır. Ġletişim bu küme başları ile sağlanır. Bu nedenle LEACH algoritması, dinamik kümeleme ve uyarlanabilir enerji tüketimi sağlayarak ana amacına ulaşır. Bu tezde yeni bir melez kümeleme algoritması ağ alanında tanıtılmış, analiz edilmiş ve uygulanmıştır. Önerilen yöntemin enerji performansı LEACH (Düşük Enerji Uyarlanabilir Kümelenme Hiyerarşi) ve SEP (Stabil Seçim Protokolü) ile karşılaştırılmıştır. Farklı kısıtlamaları ve yöntemleri ile küme baş seçimi enerji tüketimi konusunda daha iyi sonuçlar ortaya çıkartırMaster Thesis Design an energy consumption clustering method for heterogeneous wireless sensor networks(2015) Sudad, HassanThe aim of this thesis is to save the energy of the nodes. The first goal of this thesis is to reduce the total energy consumption of the wireless sensor network and the second is to increase the reliability of the protocol along with improving the network latency as compared with previous cluster-based protocols. Compares the protocol performance with LEACH is also a sub-goal of this study. We expect the performance of our proposal system will overcome the previous works.Master Thesis A node authentication mechanism on wireless sensor networks(2015) Ameen, Kameran AliA wireless sensor network (WSNs) is a network that consists of a large number of ultra-small autonomous devices which are resource-constrained called sensor nodes. Sensor networks may be deployed for a wide range of applications, including military sensing, environment monitoring and patient monitoring, etc. Sensors can collect, process and transmit data in a distributed and cooperative manner. They are usually deployed in an unattended environment (open area) and communicate with each other through wireless channels. Therefore, security is necessary to protect data from various types of attacks. The authentication process is one of the important ways to achieve security in WSNs. In this thesis, the pros of both symmetric and asymmetric key cryptography are used to achieve security. The proposed scheme secures communication by distributing the public key securely to both the base station and cluster head; as a result, this yields security of the message. The proposed scheme is efficient due to the application of data sequence over ECC, which in turn depends on the ECDLP. Therefore, it provides far more security and resistance against a number of attacks when compared with other existing schemes.Master Thesis Adaptive energy consumption method for wireless sensor networks using optimization algorithms(2018) Mahmood Al-Karkhı, Elaf AhmedThe objective of this thesis is to save the nodes energy using optimization approach with Particle Swarm Optimization Algorithm. The network area is divided to several regions for parametric study. In the proposed method, the energy of the efficient routing is enhanced and the system used the Particle Swarm Optimization for eliminate the individual nodes in wireless sensor network. In this thesis the optimization method is used to find the best hop in wireless sensor network which use the Gravitational Search Algorithm. The proposed work compared with Low Energy Adaptive Clustering Hierarchy. In simulation result the total energy for proposed method is got 8 Joules, which the energy for the OEERP is got 10 Joules and for the LEACH the 20 Joules is got. That’s mean proposed method is 20% better than the energy consumption from optimized energy efficient routing protocol and 60% better than the Low Energy Adaptive Clustering Hierarchy method is reduced. In proposed method the packet delivery ratio is high than the optimized energy efficient routing protocol and Low Energy Adaptive Clustering Hierarchy method. As result the packet delivery is 100. This values only the base value and for 4000 bit packet that time 400,000 packet will send to the base station. The packet delivery for optimized energy efficient routing protocol is 60 and for Low Energy Adaptive Clustering Hierarchy this value is 64Master Thesis Optimizing energy consumption in wireless sensor networks by using linear programing equations(Çankaya Üniversitesi, 2017) Sabir, Zaid Raad SabirWireless Sensor Networks (WSNs) it is set of sensors deployed in a specific geographic area to sensing particular action, then relays the data to one or more base station to manage it and take actions. Sensors are tiny devices supported with limited power source generally, represented by the battery. These sensors are designed to work in unattended fields for a long time months or years. So sensor life is the most important factor in the network. We have to extend sensor lifetime as much as possible to prolong the network lifetime. Hence the network lifetime can be defined as a time from running the network till they die off first nodes in the network. Therefore, we try to make energy consumption in the network that is controlled and balanced among sensors, avoiding dies one or more sensor before the others. Many methods and manners can be used to save energy and improve network lifetime, such as data aggregation, mobile nodes, transmission power control, node deployment, and clustering. In this thesis, the problem of "unbalance energy consumption" has been studied to maximize network lifetime as much as possible in the wireless sensor networks. In such networks, all sensor nodes collect and transmit data to one base station through multi-hop communications. The nodes deployment is uniform. This situation generates heavy traffic load in the nodes near to the base station. In this study, a linear program (LP) method has been studied for modeling the theoretical features of the uniform node distribution strategies in wireless sensor networks. Our results indicated that node deployment and base station location have significant effects on the energy consumption of sensor nodes. Proposed node deployment models can affect the energy consumption and can balance energy depletion between sensor nodesMaster Thesis An energy-efficient clustering based communication protocol with dividing the overall network area for wireless sensor networks(2014) Khalaf, Abdulrahman ZaidanIn this thesis, the energy efficient and connectivity problem in wireless sensor networks (WSNs) is presented. There are more difference between energy levels of near nodes and far nodes of cluster heads. This problem compensated by dividing the entire network (sensor field) into equal area and applies different clustering policies to each section. The results compared with results of LEACH (Low Energy Adaptive Clustering Hierarchy). The performance of proposal system overcomed the previous studies. Also this protocol guaranted transmitting data and transmission in high traffic networks to reduce energy consumption and packet failureMaster Thesis Evaluation and comparison of energy efficient node deployment strategies in wireless sensor networks(2015) Mahmood, Ozlam Abdulhakeem MahmoodThe lifetime of wireless sensor network is vital issue. Many wireless sensor networks applications have involve deployed sensors, these sensors are unattended for a long time (months or years). Wireless Sensor Networks (WSNs) lifetime can be enhanced if the data flow traffic in the sensor network is modified in a manner that all sensors consumed their energies in a balanced fashion. In our thesis, we studied the problem of energy depletion and sensor network lifetime improvement in many to one communications networks. In such networks, all sensor nodes collect and transmit data to one base station through multi-hop communications. The data flow traffic model is greatly non-uniform. This situation generates heavy traffic load in the nodes near to the base station. In this thesis, a linear program (LP) method has been studied for modeling the theoretical features of the non-uniform node distributions strategies in wireless sensor networks. Gaussian (normal) and exponential node deployment models have been proposed and we have tried to observe the optimal parameters of normal distribution. Also, the effect of base station location on the lifetime of sensor network has been studied in non-uniform and uniform deployment models. Our results indicated that non-uniform node deployment and base station location have significant effects on the energy consumption of sensor nodes. Proposed node deployment models can affect the energy consumption and can balance energy depletion between sensor nodes reaches a particular level.Master Thesis A robust key management scheme for hierarchical wireless sensor networks(2015) Al-Salihi, Aso Ahmed MajeedWireless Sensor Networks (WSNs) are used in many applications such as monitoring, target tracking and military applications, etc. A network is comprised of a large number of small, cheap, computational, limited energy devices which are called sensor nodes. These nodes are randomly deployed in open area to gather information. They communicate with each other via wireless media which are, however, vulnerable to being attacked by malicious nodes that may impersonate legitimate nodes. This makes the whole network liable to being hacked. Thus, security for WSNs is needed to keep any gathered data safe and to protect the communication links between sensor nodes. Key management plays a critical role in achieving security in a WSN. In this thesis, a robust key management scheme for hierarchical WSNs depends on, and exploits, the advantage of symmetric and asymmetric key cryptography. The proposed scheme uses the SHA-1 in HMAC not unlike a symmetric key for cluster formation and encryption of the private key via ECC, such as asymmetric key cryptography. Ultimately, the proposed scheme should be used to solve all these problems mentioned above.