Theses and Dissertations

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Subject: search.filters.subject.Computer network management

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    Effect of location inaccuracy on deterministic coverage and connectivity protocol in wireless sensor network
    (Dhirubhai Ambani Institute of Information and Communication Technology, 2011) Jain, Poonam; Srivastava, Sanjay
    Sensor networks have a wide range of potential, practical and useful applications. Energy saving is one critical issue for sensor networks since most sensors are equipped with non rechargeable batteries that have limited lifetime. Many of the current literature of Energy efficient scheduling protocols assumed that sensing range of a sensor node is always uniform in all directions (unitdisc model). Unfortunately, this is not appropriate for the realistic sensing model, as the sensing capabilities of networked sensors are affected by environmental factors. The other issue is that most of the protocol used the location information of sensors for accurate data analysis. GPS technology and localization algorithms provide location information. But these technologies do not give accurate information, there is some uncertainty or error is exist in location information. Most of the protocols are location depended and will not work efficiently when inaccurate information is given. The main goal of this work is to analyze the performance of deterministic energy efficient scheduling protocol with location inaccuracy.
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    Cooperation enforcement mechanisms in wireless adhoc networks
    (Dhirubhai Ambani Institute of Information and Communication Technology, 2009) Chaturvedi, Manish Shivshankar; Srivastava, Sanjay
    Wireless adhoc networks are autonomous, infrastrutureless networks where there are no dedicated routers or base stations and nodes are expected to cooperate in Wireless performing routing duties to keep network connected. Cooperation can be assumed if all nodes belong to single authority (e.g. military service or disaster management). But in applications where nodes do not belong to single authority and have limited resources (energy of battery driven devices), like pervasive computing or ubiquitous computing environment, one can not deny possibility of node selfishness. Also as there is no central authority to control node behavior, one can not deny possibility of node maliciousness. Many cooperation enforcement schemes are proposed in literature, and every scheme is shown to perform better under its own set of assumptions. These assumptions are different for different schemes. So, we aim at defining common set of assumptions and comparing selected schemes on this common ground with respect to packet delivery ratio, energy consumption, routing and other control overhead. We find that with the traffic scenario where nodes do not need services of one another at the same time, the cooperation schemes are not effective in dealing with node selfish ness. We also find that, while dealing with malicious nodes, all cooperation schemes perform better than Dynamic Source Routing(DSR) protocol in improving packet de- livery ratio(PDR), but this improvement comes at the cost of significant increase in routing control packets overhead and energy consumption of cooperation enforcement schemes is higher than that of DSR. Also they fail in punishing misbehaving nodes and the PDR of malicious nodes is comparable to that of good nodes.
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    Wireless sensor network based automatic meter reading: WSNAMR
    (Dhirubhai Ambani Institute of Information and Communication Technology, 2009) Sutariya, Mahesh R.; Ranjan, Prabhat
    Automatic Meter Reading is technology evolved from 1995[3] or before, for remote collection of utilities measurement data which involve Electricity, Gas and Water etc. In this process of evolution every time new idea was methodology being used for implementation. In this thesis same task of meter reading will be performed wirelessly by using zigbee standard developed for the low power wireless sensor network. Concentration is on electrical energy. Goal of this work is to have a Remote collection of measured energy value as well as to have an on/off control of this energy supply which will indirectly enable wireless monitoring of energy consumption, prepaid billing etc through web based interface provided. So work will involve development of hardware and firmware and web based software to achieve this functionality. Once energy consumption data is available to us, it can be used for purpose of dynamic tariff management, dynamic load management, power quality monitoring, peak power consumption etc.