Document Details
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Document Type |
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Thesis |
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Document Title |
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Efficient Deployment Protocol to Ensure Coverage and Connectivity in Wireless Nanosensors Network بروتوكول نشر فعال لضمان التواصل والتغطیة في شبكة المستشعرات النانونیة اللاسلكیة |
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Subject |
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Faculty of Computing and Information Technology |
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Document Language |
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Arabic |
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Abstract |
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Our world has witnessed many advancements in many different fields throughout the centuries. The concept of creating nano devices that can't be seen by the naked eye, to cure diseases and solve problems was considered a pure fiction up until recent years. Today, many researches and studies are been conducted to help bring nanotechnology into reality.
Among many Nanodevices, Nanosensors have become the focus of many studies and researches. With the use of Nanosensors, many new applications can be invented and executed. Nonetheless, in order for the wireless nanosensors network (WNSN) to be capable of accomplishing the goals and missions of the application, the network must be setup appropriately and efficiently during the deployment stage. A good deployment protocol for WNSN has to guarantee a continuous connectivity between Nanosensors to prevent the creation of partitions in the network, a sufficient coverage for the target area to prevent the creation of holes where the information about a part of the target area is not collected. Finally, a reduced energy consumption to consider the limited power of Nanosensors should be ensured. Furthermore, a good deployment protocol has to take into account Nanosensors limited capabilities and constraints.
Due to Nanosensors constraints, researches proved that the most appropriate signal for Nanosensors communications is the Terahertz signal. The Terahertz band has some unique peculiarities such as the high propagation loss impacted by the mediums' molecules composition which effects the distance of the communication and the transmission range. The combination of the Terahertz peculiarities and the limited capabilities of Nanosensors represent the main challenges facing the deployment of WNSN.
In this thesis, we account for Nanosensors constraints by studying the different deployment strategies proposed for WNSN and identifying the differences between the deployment of wireless sensor network (WSN) and WNSN. Consequently, we identify the different attributes that impact the deployment of WNSN from the distance between the communicating Nanosensors to the molecules composition of the deployment medium. We recognize that loosing the connectivity between Nanosensors will cause the loss of the information collected by Nanosensors regardless of how well Nanosensors performed their tasks. Therefore, our main target is to ensure the continuous connectivity between Nanosensors during the deployment process by studying different water vapor concentrations in the deployment medium. To do that, we identify the most convenient distance between Nanosensors in which the successful reception of the packets at the Nanocontroller is guaranteed. For that, using MATLAB, we calculate the received power for a range of distances taking into account the effect of molecules, distance and frequency on the terahertz signal's power. Then, we propose a deployment protocol based on the computed distance. This deployment protocol is executed by the Nanocontroller when the mobility of NS is possible only at the beginning, until each NS reaches its final position dictated by the Nanocontroller. Based on this deployment, a forwarding mechanism for transmitting packets to the Nanocontroller is introduced. The forwarding mechanism limits packets forwarding to only the neighboring Nanosensors nearest to the Nanocontroller.
We evaluate the performance of our proposed deployment protocol against the random deployment of WNSN using TeraSim. We concluded that our proposed deployment protocol is able to deploy WNSN with a good performance in terms of the network's throughput, reduced energy consumption and ensured continuous connectivity between all Nanosensors and the Nanocontroller. |
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Supervisor |
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Dr. Saoucene Mahfoudh |
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Thesis Type |
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Master Thesis |
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Publishing Year |
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1441 AH
2020 AD |
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Added Date |
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Thursday, June 11, 2020 |
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Researchers
| أماني صالح بامقابل | Bamuqabel, Amani Saleh | Researcher | Master | |
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