Theses and Dissertations

Permanent URI for this collectionhttp://ir.daiict.ac.in/handle/123456789/1

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Subject: search.filters.subject.Routing protocol

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    ItemOpen Access
    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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    ItemOpen Access
    Mobility aware MANET routing protocol using cross layer design
    (Dhirubhai Ambani Institute of Information and Communication Technology, 2006) Patel, Komalben; Srivastava, Sanjay; Lenin, R. B.
    Mobile Adhoc Network (MANET) is a dynamic network with time varying topology and time varying network resources. Due to the error-prone wireless channel and high mobility, traditional protocols of wired networks cannot be successfully applied to MANETs. The popularity of mobile and hand held devices equipped with wireless interface is creating a new challenge for Quality of Service. The wired network has also not been able to fulfill end-to-end guarantees. Due to the nature of MANETs, achieving the same end-to-end guarantees is very difficult. The mobility rate makes the task dicult. The aim is to fight against the losses caused due to mobility. This work attempts to build stable paths so as to counter the effects of mobility induced route failures. Using the Cross Layer Approach, the signal strength of the link from the MAC Layer is captured and used at the network layer. Upon receiving the signal strength values, the network layer carries out a prediction mechanism to predict the future signal strength. This information is then used to categorize the link as stable or unstable. The work also deals with designing a proactive routing protocol which uses the information of stable and unstable links to build up routes using limited dissemination technique. The protocol is similar to distance vector protocol in which, only the distance vectors whose next hop is a stable is advertised. This ensures that only stable link information reaches the other nodes in the network. The protocol has been tested in Network Simulator-2 and compared with the Destination Sequenced Distance Vector [PB94] and the Adhoc On-Demand Distance Vector [PR97] protocols. Various parameters like percentage of packet delivery, packet latency, effects of moblity, etc. are measured. The results show that the performance of the designed protocol is better than AODV in high traffic scenarios. With less overhead, the proposed protocol always performs better than DSDV. In high mobility scenarios, the protocol is comparable to AODV and performs better than DSDV.
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    ItemOpen Access
    Incorporation of mobility model of nodes in zone routing protocol for mobile ad hoc wireless networks
    (Dhirubhai Ambani Institute of Information and Communication Technology, 2004) Chander, Vipperla Ravi; Vijaykumar, Chakka
    Ad Hoc wireless networks are characterized by dynamically changing network topology due to relative motion of the nodes. This leads to the exchange of large number of control packets between the nodes to maintain the network topology resulting in reduced throughput in such networks and wastage of bandwidth in the exchange overhead control packets. In this thesis, we propose the use of mobility models of the nodes to improve routing protocol performances. The basic idea is that the neighboring nodes exchange their mobility models (i.e., location and velocity information) during network updates and use this information to determine more stable routes that do not become invalid due to the nodes movement. This technique has been incorporated into one of the popular routing protocol for Mobile Ad Hoc Networks known as the 'Zone Routing Protocol'. Among envisaged improvements with the above technique is determination of stable routes leading to reduction in the number of route failures, reduction in the number of overhead control packets, Scope for the use of directional antennas, bandwidth efficiency and reduction in power consumption at mobile nodes. Simulations have been performed in MATLAB to analyse the performance of the ZRP with mobility models incorporated and the analysis results show decent improvements.