Theses and Dissertations
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Item Metadata only QoS-aware Task Allocation and Scheduling in Cloud-Fog-Edge Architecture with Proactive Migration Strategy(Dhirubhai Ambani Institute of Information and Communication Technology, 2023) Joshi, Nikita; Srivastava, SanjayThe vision of the Internet of Things (loT) is made possible by advancements in sensor technologies, smart devices, wearable gadgets, and communication paradigms. IoT Service Providers (loSPs) provide loT services such as smart cities, virtual and augmented reality and pervasive healthcare. These services produce a significant amount of time-sensitive data to be processed. IoT devices can not process these data due to resource and energy constraints. Centralized cloud computing services can provide on-demand computationaland storage capabilities through the Internet. Users of cloud computing benefit from minimal startup costs for their IT needs, unlimited resources, and easy ac cess to them. Therefore, IoSPs send task requests to process these data to Cloud Service Providers (CSPs). However, the emerging trend of delay-sensitive appli cations demands low latency, privacy, and context awareness, which can barely be satisfied by applications processed at distant cloud centers as it takes a signif icant amount of time to send and receive a massive volume of data. Several newa distributed computing models have emerged that provide computing and storage services close to service consumers to satisfy the latency and context awareness needs of the applications such as Fog computing, Cloudlets and Micro data cen ters. They extend the cloud services to the network edge and give services to the end-users with low latency and decrease data traffic.Fog Service Providers (FSPs) are available in the market who have deployed computation servers that can act as fog devices. CSPs can offload the task request received from IoSP to FSP to decrease the service delay and pay to FSP from the payment received from IoSPs. The IoT tasks have Quality of Service (QoS) re quirements such as deadlines and priorities. In addition, IoT tasks are online in nature. As a result, task requirements are not known in advance. The allocation of resources to these tasks in a commercial three-tier architecture is a complex prob lem since QoS requirements of IoT applications and competition among loSPs and FSPs for the price of the resources must be considered. The perishable nature of cloud-fog resources makes allocation more challenging. Resources not allocated at a specific time cannot be reused later. Considering this property when deter mining the price of resources and allocations is essential.In such a competitive market where each service provider, such as loSPs, CSPs, and FSPs, wishes to maximize its profit, auction mechanisms are the best tools for finding prices of resources and allocating them in a manner that allows service providers to benefit from market demand and IoSPs to benefit from competition among providers. In our model, CSP acts as a broker between IoSPs and FSPs. FSPs have resources to sell with price demand, and IoSPs have task requirements with the cost they are willing to pay. FSPs want to sell at a maximum price, and IoSPs want to purchase resources at a minimum price. Moreover, due to the per ishable nature of the resources, if FSPs bid too high, resources will not be allo cated, resulting in their loss. The double auction can be used to find equilibrium in this situation. A multi-attribute double auction mechanism is employed in oura model to account for both QoS requirements of tasks and monetary competition between IoSPs and FSPs.We perform task allocation in batch mode and online mode. Batch mode al location is done at every fixed interval. It is assumed that task requests can be generated at any time. Depending on the criticality of the task, it can be executed in batch mode or online mode. In batch mode, eligible FSP is found for eacha task, and then (TASC) is used for price determination. After that, considering the perishable nature of the resources, the remaining resources are also allocated at a lower price with some constraints on IoSPs. For doing the auction for online tasks, there are no other competitors to compare and make efficient decisions. We perform a virtual auction at the beginningof the system to handle this situation, giving us the critical price for differentsupply-demand scenarios and QoS levels. This critical price decides whether an online task request should be accepted or rejected. Also, the dynamic nature of the Internet, the scarcity of resources in the cloud fog, and the variability in service rates in the cloud fog may delay the execution of IoT tasks after allocation, low ering the task value. Therefore, service delay between IoSP and allocated FSP is monitored after allocating the tasks. If, for any reason, it is observed that the task may not be completed before the deadline, then more resources are allocated, or the task is migrated to another FSP. We prove that our algorithm is a polynomial time algorithm of time complexity O(N2K2M) where N is the number of IoSPs, a M is the number of FSPs, and K is the number of tasks.The remote patient monitoring system is used as a case study to verify the pro posed QoS-aware Task Allocation and Scheduling (QoTAS). We consider the tasks performed in remote patient monitoring systems with their resource and QoS re quirements. The Internet behavior is simulated in Netsim to get network delay between FSP-IoSP and FSP-FSP. We perform experiments to compare the batch allocation algorithm (QoTAS-B) with Multi attribute-based double auction mech anism (MADA) [81] and batch with online allocation algorithm (QoTAS-BO) with Reverse auction-based online allocation (RAOA) [18]. Which shows proposed algorithm outperforms the existing work [81] and [18]. Also, results show that migration increases the task completion ratio.Item Metadata only MIMO reception in Rayleigh and Rician fading with imperfect channel estimation(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Baranwal, Sweety; Vasavada, YashWireless communication technology has undergone significant improvement over the past decades which has lead to the higher data rates and better bit error rate (BER) performance. There has been increase in the demand for high channel capacity in multipath fading environment which is possible by Multiple Input Multiple output (MIMO) system. MIMO system increases the capacity, makes communication more reliable and reduces the effect of channel fading. Channel State Information (CSI) at the receiver needs to be estimated to improve the performance of detection and estimation of symbols.Item Metadata only Beaches of Mumbai(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Shah, Dishant; Desai, BinitaThe project brief was to understand the importance of the Mumbai's beaches for the local residents. How the city's beaches, act like a provider of open space (space which can be used for free by rich and poor young and old without any restrictions) and a provider of livelihood. Further, the aim was also to spread awareness about this importance of the beaches among the people so that they proactively take steps towards keeping the beach and its ecosystem clean. The purpose was to come up with a communication product which would draw attention to the importance of beach especially in a city like Mumbai. My intention for choosing this topic was to urge the people (the local residents and authorities) to take requisite steps to preserve the beach and its ecosystem before it is too late.Item Metadata only Janane ka hak : Graphic novel(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Yadav, Vikas; Desai, Binita; Mazumdar, MadhumitaThis report presents the design of a Graphic Novel as a medium to communicate the story of people's movement for RTI which began from a small village in Central Rajasthan and spread out to become a nation-wide demand for Right to Information.Item Metadata only Alzheimer's awareness and care(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Sinwal, Shweta; Mazumdar, Madhumita; Desai, BinitaThe project brief is to understand the mental disorder like Alzheimer's and to be able to distinguish between normal aging problems and signs of the onset of Alzheimer's, which is the most confusing thing to understand. It also spreads the awareness about the risk factors, the difference between sign and symptoms, the aspects that Alzheimer's affects the most, the complete diagnosis process. But majorly, it talks about the caregiving part and the role of caregivers. Caregiving is the most crucial part in disorders like Alzheimer's as in such conditions medications alone cannot provide relief to the patient but the caregiving does. Therefore, this project deals with providing the guidelines to family members as well as caregivers on how to manage and taking care of the person with Alzheimer's. And since, caregiving here means caring for two people; the person with the illness and the person taking care of himself or herself. Therefore, the last part of the project also covers the points in which a caregiver can take care of himself or herself.Item Metadata only Dekha andekha darbar : Documentary film(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Agarwal, Aakanksha; Pandya, Vishvajit; Mazumdar, MadhumitaThere's an old legend popular among the local folks of the Dangs district of Gujarat. It says that, when offered by the Britishers, the rajas or kings of Dang chose money over the rich and prosperous jungles of the region. The Britishers agreed to keeping the trees and the jungles while kings can have their money. This kind of sums up the entire situation of the Dangs district where the kings are being paid annually even now but are deprived of their jungle and the trees.Item Metadata only Changes in the Bardic traditions of Gujarat(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Kadegia, Bhavik; Pandya, Vishvajit; Mazumdar, MadhumitaThis project is to understand the importance of bards in culture, Specifically in culturally rich Saurashtra of Gujarat. Here, one can witness the solidness of the belief and pride in their heritage, which is becoming obsolete in the rapid and blind modernizing word of today. Bardic Communities like Barots and Charans have played an important role in this. Because their way of living heavily depends on the traditions which carry the culture as well as their inherited folk literature, which is a regional industry itself which has imbibe the new technology of the present day.There has to be a path that these communities passed through to reach their current status. There was a socio-political system in the past that depended on these communities. I took Charans and Barots initially as they are the most influential of all the bardic communities in Gujarat as well as most well-known also. Today what we see them as a result of their journey, this project is to uncover the narrative of their story and co-relate the different node in past to translate the history into a logical analysis, employing ethnographic methods, with historical and social literature.Item Metadata only Chutkis (Jani kala ke anjaane karigar )(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Agnihotri, Anupriya; Mazumdar, MadhumitaIn the last few years Chikankari an intricate art of doing fine and delicate embroidery on cloth by hand is getting commercialized because of its great demand from domestic as well as from the foreign market. The craft that was about to die has under done revival due to the effort made by the government and non government organizations. The number of shops in the Lucknow is increasing day by day. But still the craft sector is unorganized only few organized sectors are available in the city. Unorganized sector mainly consist of the women embroiders or chutkis that are found in the village and are practicing the craft because of some need. They are not the generation carrier of this craft but they want to learn it so that they can earn some money for their family .But due to no knowledge of the craft and the market they are easily getting exploited by the middle men who bring cloth from the city and give them to these women at an extremely low price. The project aims to communicate about the condition of the female Chikankari artisans in the rural area near Lucknow Who are part of the unorganized Chikankari sector.Item Metadata only Gangdo vahlo lage che - life of Salt Pan workers(Dhirubhai Ambani Institute of Information and Communication Technology, 2019) Patel, Parth; Pandya,Vishvajit; Mazumdar,MadhumitaThe project brief was to find out the technological changes brought in the life of Agariyas in the Little Rann of Kutch. It has been seen that since a few years back few NGO's have started installing solar panels in the desert to pump out the brine water, that is used to make the salt. This certainly brings up the questions about the salt farming that had begun here and if solar is a new change in technology for them, it is indeed a matter of curiosity as to what the Agariyas used earlier. There has always been a gap between the originality of the livelihood of Agariyas and the information that people receive through sources like news and media. The aim was to come up with a communication product which would draw attention to the gap between the audience and the Agariyas. This is for better understanding and making people aware of the salt pan workers who play a very important role in producing the nation's salt.Item Metadata only On insider attack in distributed file systems(Dhirubhai Ambani Institute of Information and Communication Technology, 2018) Solani, Riddhi; Das, Manik LalDue to heavy use of internet, mobiles, sensors etc. Data is growing rapidly day-by-day. However traditional database systems fail to store such a huge semi structured or unstructured data which raises the need for distributed file systems. Distributed file system is a client server based architecture that can store massive amount of data in any format and provide faster access. However in this kind of systems, security is a major concern as user needs to store their sensitive data away from them. Most of the security solutions available for this kind of systems focus on the detection and prevention of outsider attack but according to recent surveys, insider attack is more frequent than outsider attack in this kind of systems. However there is not much available about the detection of insider attack in the literature. In this work, we've designed an approach to detect the insider attack in distributed file systems. The proposed solution is based on the client-server architecture and data replication property of distributed file systems. As an example of distributed file systems, HDFS is considered. We've designed two algorithms namely process profiling algorithm that run on the datanode and replica and give some output to namenode, attack detection algorithm that run on the namenode which confirms the attack from the information received from the datanode and replica. The proposed solution is simulated and analyzed it in terms of the time complexity.