Congestion control for SCTP in wireless ad-hoc networks.
Item
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Title
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Congestion control for SCTP in wireless ad-hoc networks.
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Identifier
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AAI3144153
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identifier
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3144153
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Creator
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Ye, Guanhua.
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Contributor
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Adviser: Tarek Saadawi
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Date
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2004
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Electronics and Electrical
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Abstract
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This thesis focuses on improving Stream Control Transmission Protocol (SCTP) congestion control performance in wireless ad hoc networks. As our experiments show, schemes proposed in this work are effective for SCTP to handle wireless errors in ad hoc network, and the proposed Independent per Path Congestion Control framework also extends SCTP's capability in supporting multi-homing applications, such as load balancing and load sharing. In this work, we first conduct extensive simulation studies of SCTP performance in wireless ad hoc networks. The goal is to identify its limitations in such environment. The performance evaluation work gives us better understanding of the operation of the protocol, and it also represents essential input for further improvement of SCTP performance in wireless ad hoc networks.;To handle packet losses caused by wireless errors in ad hoc networks, we first introduce ECN mechanism into SCTP, which makes SCTP ECN-capable. Then we use the concept of congestion coherence to differentiate wireless losses from congestion losses by using ECN as congestion signal. Wireless-aware SCTP is then developed, which decouples loss recovery mechanism from congestion control mechanism. The design of Wireless-aware SCTP considers simultaneously the nature of wireless losses (random or bursty losses), the energy conservation for battery powered ad hoc nodes, and the goodput performance.;In this work, we also study how to overcome limitations of congestion control of standard SCTP when multi-homing feature is used. The per association congestion control structure makes it unfeasible to extend standard SCTP for load sharing, load balancing and other multi-homing applications. In this work, we identified and analyzed limitations of the congestion control mechanism of standard SCTP in the context of using multiple paths simultaneously. We propose an Independent per Path Congestion Control framework for standard SCTP to overcome these limitations. SCTP with independent per path congestion control not only overcomes existing flaws of standard SCTP in supporting the multi-homing feature but also demonstrates its capability in bandwidth aggregation under various network conditions.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
