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Unurkhaan, Esbold. "Secure end-to-end transport over SCTP a new security extension for SCTP /". [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975686569.
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Jungmaier, Andreas. "Das Transportprotokoll SCTP : Leistungsbewertung und Optimierung eines neuen Transportprotokolls". kostenfrei, 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976743582.
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Eklund, Johan. "On Switchover Performance in Multihomed SCTP". Licentiate thesis, Karlstad University, Faculty of Economic Sciences, Communication and IT, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-5501.
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The emergence of real-time applications, like Voice over IP and video conferencing, in IP networks implies a challenge to the underlying infrastructure. Several real-time applications have requirements on timeliness as well as on reliability and are accompanied by signaling applications to set up, tear down and control the media sessions. Since neither of the traditional transport protocols responsible for end-to-end transfer of messages was found suitable for signaling traffic, the Stream Control Transmission Protocol (SCTP) was standardized. The focus for the protocol was initially on telephony signaling applications, but it was later widened to serve as a general purpose transport protocol. One major new feature to enhance robustness in SCTP is multihoming, which enables for more than one path within the same association.
In this thesis we evaluate some of the mechanisms affecting transmission performance in case of a switchover between paths in a multihomed SCTP session. The major part of the evaluation concerns a failure situation, where the current path is broken. In case of failure, the endpoint does not get an explicit notification, but has to react upon missing acknowledgements. The challenge is to distinguish path failure from temporary congestion to decide when to switch to an alternate path. A too fast switchover may be spurious, which could reduce transmission performance, while a too late switchover also results in reduced transmission performance. This implies a tradeoff which involves several protocol as well as network parameters and we elaborate among these to give a coherent view of the parameters and their interaction. Further, we present a recommendation on how to tune the parameters to meet telephony signaling requirements, still without violating fairness to other traffic.
We also consider another angle of switchover performance, the startup on the alternate path. Since the available capacity is usually unknown to the sender, the transmission on a new path is started at a low rate and then increased as acknowledgements of successful transmissions return. In case of switchover in the middle of a media session the startup phase after a switchover could cause problems to the application. In multihomed SCTP the availability of the alternate path makes it feasible for the end-host to estimate the available capacity on the alternate path prior to the switchover. Thus, it would be possible to implement a more efficient startup scheme. In this thesis we combine different switchover scenarios with relevant traffic. For these combinations, we analytically evaluate and quantify the potential performance gain from utilizing an ideal startup mechanism as compared to the traditional startup procedure.
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Tsai, Mike Yao Chen. "Hybrid design of MPI over SCTP". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/32492.
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Message Passing Interface(MPI)is a popular message passing interface for writing parallel applications. It has been designed to run over many different types of network interconnects ranging from commodity Ethernet to more specialized hardwares including: shared memory, and Remote Direct Memory Access (RDMA) devices such as InfiniBand and the recently standardized Internet Wide Area RDMA Protocol (iWARP). The API itself provides both the point-to-point and remote memory access (RMA) operations to the application. However, it is often implemented based on one kind of underlying network device, namely entirely RDMA or point-to-point. As a result, it is often not possible to provide a direct mapping from the software semantics to the underlying hardware. In this work, we propose a hybrid approach in designing MPI in which network device to use can depend on its functional requirement. This allows the MPI API to exploit the potential performance benefits of the underlying hardware more directly. Another highlight of this work is the design of the MPI middleware to be IP based in order to provide support for both cluster and wide area network environment; this can be achieved via the use of a commodity transport layer protocol, namely Stream Control Transmission Protocol (SCTP). We will demonstrate how SCTP can be used to support MPI with different kinds of network devices and to provide multirailing support from the transport layer.Science, Faculty of
Computer Science, Department of
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Hedén, Mattias. "SCTP - An analysis of proposed implementations". Thesis, Högskolan i Skövde, Institutionen för kommunikation och information, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-5216.
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There are several weaknesses in the popular transport protocol TCP (Transmission Control Protocol). A possible replacement to TCP would be the newer protocol SCTP (Steam Control Transmission Protocol). This thesis presents three different proposed implementations of SCTP: HTTP over SCTP, online games over SCTP and IP mobility over SCTP. The proposed implementations are analyzed, based on relevant literature, and recommendations are issued on the importance of moving forward with them. The result of the thesis is that HTTP over SCTP is recommended. SCTP features such as multi-streaming, multi-homing and the four-way handshake addresses the inherent weaknesses with using TCP for HTTP traffic. IP mobility over SCTP is also recommended since it results in lower delay in the handover process compared to MIPv6 (Mobile IPv6). Online games over SCTP, however, is not recommended since the existing implementations of SCTP results in poor latency for the kind of traffic online games produce.
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Bickhart, Ryan W. "Transparent TCP-to-SCTP translation shim layer". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 0.44 Mb, 82 p, 2005. http://wwwlib.umi.com/dissertations/fullcit/1428177.
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Halepoto, Imtiaz Ali. "Scheduling and flow control in CMT-SCTP". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/210189.
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Hurtig, Per. "Improving the Timeliness of SCTP Message Transfers". Licentiate thesis, Karlstad : Faculty of Economic Sciences, Communication and IT, Computer Science, Karlstads universitet, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-2861.
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Vinci, Lorenzo. "Studio comparato del protocollo di comunicazione SCTP". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2013. http://amslaurea.unibo.it/5594/.
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Begg, Charles Lee. "High Quality Video Streaming with SCTP over CDMA2000". Thesis, University of Canterbury. Computer Science and Software Engineering, 2007. http://hdl.handle.net/10092/1198.
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The research reported in this thesis investigates the performance of the transport layer Stream Control Transfer Protocol (SCTP) for streaming video over CDMA2000 cellphone and data wireless networks. The main measure of performance was quality of the received video at a given buffer size, as cellphones have memory of limited capacity. The hypothesis was that SCTP would be able to improve the quality of streamed video over UDP under the same memory requirements. Our study involved two series of simulation experiments and measurements in a testbed on the Telecom NZ CDMA2000 network, to test the performance of video streaming under SCTP and under UDP. It was found that SCTP did not improve the quality in streamed video with up to 5 second buffers. While other scenarios that have been tested by other people with high packet loss or congestion have shown that SCTP can improve the quality, the CDMA2000 network does not suffer from the impairments that SCTP could neutralise, and because of that, in this scenario, the quality of video streaming under SCTP and UDP are similar. The complexity that SCTP adds does not correspond to an increase in quality.
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Pfützenreuter, Elvis. "Aplicabilidade e desempenho do protocolo de transporte SCTP". Florianópolis, SC, 2004. http://repositorio.ufsc.br/xmlui/handle/123456789/87730.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da Computação.Made available in DSpace on 2012-10-22T01:11:16Z (GMT). No. of bitstreams: 1 213684.pdf: 479521 bytes, checksum: 76ef279df5de278a73eee8d7f8e0caab (MD5)
Nas pilhas de protocolos de rede típicas, como TCP/IP, a camada de rede oferece transmissão não confiável de datagramas um serviço muito primitivo para ser usado diretamente pelas aplicações em geral. É a camada de transporte a responsável por oferecer serviços de rede confiáveis e confortáveis às aplicações. A pilha TCP/IP oferece tradicionalmente apenas dois protocolos de transporte: TCP e UDP. O UDP implementa apenas o recurso de portas, sem acrescentar confiabilidade à rede. O TCP, por outro lado, oferece um serviço confiável, com conexões ponto-a-ponto e transmissão de bytes, abstraindo completamente as características da rede. TCP e UDP são dois extremos; algumas aplicações desejariam usar ao mesmo tempo recursos de ambos os protocolos, e/ou ter controle mais direto sobre alguns aspectos da rede. Tal necessidade surgiu na sinalização telefônica, o que motivou a criação de um novo transporte, o SCTP. O SCTP (Stream Control Transmission Protocol) guarda diversas semelhanças com o TCP, mas também apresenta diversos recursos adicionais interessantes: transmissão de mensagens indivisíveis, multiplos fluxos de mensagens por conexão, variação da confiabilidade das mensagens, bem como melhorias de segurança. A proposta deste trabalho é apresentar os recursos do SCTP, estudar a aplicabilidade do mesmo a protocolos de aplicação que hoje utilizam TCP ou UDP como transporte, e realizar testes de desempenho sobre uma implementação real do SCTP, com a simulação de diversas condições típicas de rede. O desenvolvimento do trabalho envolveu uma razoável revisão bibliográfica sobre protocolos em todas as camadas, criação e adaptação de aplicativos para execução dos testes, uso de ferramentas de simulação de rede, escolha de métricas de avaliação de desempenho, e adaptação de protocolos de aplicação ao SCTP.
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Bandaru, Rammohan y Debashis Barman. "Performance Evaluation of SCTP as a Transport Layer Protocol". Thesis, Högskolan i Halmstad, Sektionen för Informationsvetenskap, Data– och Elektroteknik (IDE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-16003.
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TCP and UDP are the most popular transport protocols used for end-end data transmission. The rapid growth of internet leads to development of many innovative applications in the current environment. Depending on the functionality of these applications, requirements of transport protocols are changing. TCP is known for its problems with Head Of Line blocking (HOL) and SYN attacks which gives reduced performance, and also doesn’t support Multi-Homing. SCTP is another transport layer protocol similar to TCP which provides end-end communication. It has some unique features like support for Multi-homing and multi-streaming. It also protects better from SYN attacks by using four-way hand shake mechanism during association establishment. As an extension to SCTP, CMT-SCTP was proposed to take full advantage of a multi-homed host by doing load sharing over multiple paths. SCTP is believed to be a next generation transport protocol. This thesis gives an overview of the SCTP protocol and its features focusing on analysing and testing of failover mechanisms provided by SCTP in multi-homed host, evaluating the transmission performance of SCTP vs TCP in a real network environment. This report also gives a theoretical analysis on how SCTP can mitigate SYN attacks by using four-way handshake mechanism and the state of art of CMT-SCTP.
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Viegas, Diogo Ruviaro. "Um estudo experimental dos protocolos TCP, SCTP e XTP". Florianópolis, SC, 2008. http://repositorio.ufsc.br/xmlui/handle/123456789/91830.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da ComputaçãoMade available in DSpace on 2012-10-24T02:55:47Z (GMT). No. of bitstreams: 1 250556.pdf: 2598282 bytes, checksum: d81d0812122590acfcb56384d46f4d69 (MD5)
Nas redes de dados das operadoras de telefonia celular é fundamental que o protocolo utilizado na comunicação entre terminais seja confiável e seguro e que possa prover o máximo de garantias a integridade dos dados. Os protocolos usualmente utilizados na comunidade científica fazem parte da pilha TCP/IP. O protocolo UDP não acrescenta confiabilidade à rede e apenas implementa a multiplexação. Por outro lado, o protocolo TCP tem a vantagem de ser um protocolo confiável possuindo conexões ponto-a-ponto. Na rede de telefonia celular, considera-se nas maioria das vezes o protocolo TCP e deseja-se que as vantagens de UDP existam no TCP. Desta forma, nessa dissertação optou-se pelo estudo dos protocolos SCTP e XTP por possuírem tais características em comum e acrescentar alguns diferenciais. Entre os recursos que mais de destacam no SCTP estão a transmissão de mensagens indivisíveis, múltiplos fluxos de mensagens por conexão, variação da confiabilidade das mensagens, entre outras. Por outro lado o XTP tem como características trabalhar em aplicações de alto desempenho, e por possuir similaridades com o TCP. A proposta deste trabalho de pesquisa é de prover um estudo empírico utilizando-se dos protocolos TCP, SCTP e XTP. O estudo caracteriza-se por considerar os recursos do SCTP e XTP, a fim de demonstrar em uma rede real interna de uma operadora de telefonia móvel o diferencial dos mesmos suportando protocolos de aplicação e simulando diversas condições de rede.
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Charoenpanyasak, Sakuna. "Optimisation inter-couches du protocole SCTP en réseaux ad hoc". Phd thesis, Toulouse, INPT, 2008. http://oatao.univ-toulouse.fr/7709/1/charoenpanyasak.pdf.
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Les protocoles de transport fiables ont été conçus pour s'adapter aux problèmes de congestion dans les réseaux filaires. Dans les réseaux ad hoc, leur fonctionnement conduit à une dégradation de performances que nous nous proposons de traiter par une adaptation à la mobilité en utilisant une méthode de communication inter-couches. Plus précisément, nous étudions l’amélioration des performances du protocole SCTP; très semblable au protocole TCP il définit un fonctionnement multihoming qui en environnement filaire améliore les performances du transfert. Nous montrons que cette option est également intéressante en réseaux ad hoc. Dans ce travail nous définissons deux modes d'adaptation: un mode local et un mode réparti. Dans un premier temps nous proposons une adaptation locale du transport selon l'état du réseau perçu par le protocole de routage. Dans un second temps, nous proposons une optimisation inverse, répartie sur les nœuds, où il s'agit d'adapter le routage au fonctionnement du protocole transport, de façon à pouvoir bénéficier du traitement multihoming de SCTP. Nous évaluons nos propositions par simulation et déterminons leur domaine de validité. Ce travail se conclut par la proposition d'une architecture d'adaptation permettant d'utiliser selon leurs domaines de validité les optimisations proposées.
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Xiong, Xuelin. "SCTP and Diameter Parameters for High Availability in LTE Roaming". Thesis, KTH, Radio Systems Laboratory (RS Lab), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-163254.
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Today mobile network operators utilize IP Packet exchange (IPX) carriers to interconnect their networks with other operators. Mobile network operators are free to choose one IPX carrier for their data traffic and another for their control traffic. This thesis examines the case of control traffic, specifically Stream Control Transmission Protocol (SCTP) carrying Diameter protocol traffic arising from users roaming from their home Long Term Evolution (LTE) network to another operator’s LTE network. The thesis project aims to identify a set of SCTP parameter configurations that can provide improved application/service level availability between two Diameter nodes in different network connectivity environments, specifically for IPX carriers who are Diameter service providers. These service providers provide Diameter connectivity for their customers who are mobile network operators. These mobile network operators in turn provide LTE roaming services to their customers. Unfortunately, applying the ‘One size fits all’ configuration recommendations given in the SCTP documentation is unsuitable for different network environments. In addition, the amount of Diameter signaling traffic is growing at a very rapid rate. Therefore, it is valuable to identify suitable parameter selection criteria for Diameter service providers to ensure 100% Diameter connectivity reliability for their customers. In this thesis project, author investigated how tuning SCTP parameter values affect Diameter message transmission in terms of Round Trip Delay and identified its determining parameters for packet loss recovery performance. Both IPX carriers and mobile network operators may use these values as reference when attempting to ensure high availability of Diameter transmissions under reliable, semi reliable, and unreliable network transport conditions.Mobilnätsoperatörer använder sig av IP Packet exchange (IPX) tjänstetillhandahållare för att koppla ihop sina nät med andra operatörers nät. Mobilnätsoperatörer kan fritt välja en IPX tjänstetillhandahållare för sin datatrafik och en annan för sin kontrolltrafik. Denna uppsats undersöker fallet för kontrolltrafik, specifikt Stream Control Transmission Protocol (SCTP) kommunikationsprotokoll för Diameter protocol-trafik vid användares roaming från sitt Long Term Evolution (LTE)-hemmanät till en annan operatörs LTE-nät. Examensarbetet avser etablera en uppsättning av SCTP-parameterkonfigurationer som ger förbättrad applikations-/tjänstetillgänglighetsnivå mellan två Diameter-noder i olika nätmiljöer, särskilt för IPX tjänstetillhandahållare som är Diameter tjänstetillhandahållare. Dessa tjänstetillhandahållare erbjuder Diameter-konnektivitet till sina kunder, som är mobilnätsoperatörer. Dessa mobilnätsoperatörer tillhandahåller i sin tur LTE-roamingtjänster till sina kunder. Tyvärr är det olämpligt att tillämpa de enhetliga konfigurationsrekommendationer, som ges i SCTP- och Diameter-protokollens dokumentation, i olika nätmiljöer. Samtidigt ökar Diameter-signaleringstrafiken mycket snabbt. Därför är det värdefullt att identifiera lämpliga parameterkriterier för Diameter-tjänstetillhandahållare att säkerställa 100% tillförlitlig Diameter-tillgänglighet för sina kunder. I detta examensarbete har författaren undersökt hur trimning av SCTP-parametervärden påverkar Diameter-meddelandeöverföring vad avser överföringstiden tur- och retur, och identifierat de avgörande parametrarna för återställande av paketförluster. Både IPX tjänstetillhandahållare och mobilnätsoperatörer kan använda dessa värden som referens för att åstadkomma hög tillgänglighet för Diameter-överföring vid tillförlitliga, halvtillförlitliga och otillförlitliga nättransportförutsättningar.
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Rajiullah, Mohammad. "Towards a Low Latency Internet: Understanding and Solutions". Doctoral thesis, Karlstads universitet, Institutionen för matematik och datavetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-37487.
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Networking research and development have historically focused on increasing network throughput and path resource utilization, which particularly helped bulk applications such as file transfer and video streaming. Recent over-provisioning in the core of the Internet has facilitated the use of interactive applications like interactive web browsing, audio/video conferencing, multi- player online gaming and financial trading applications. Although the bulk applications rely on transferring data as fast as the network permits, interactive applications consume rather little bandwidth, depending instead on low latency. Recently, there has been an increasing concern in reducing latency in networking research, as the responsiveness of interactive applications directly influences the quality of experience. To appreciate the significance of latency-sensitive applications for today's Internet, we need to understand their traffic pattern and quantify their prevalence. In this thesis, we quantify the proportion of potentially latency-sensitive traffic and its development over time. Next, we show that the flow start-up mechanism in the Internet is a major source of latency for a growing proportion of traffic, as network links get faster. The loss recovery mechanism in the transport protocol is another major source of latency. To improve the performance of latency-sensitive applications, we propose and evaluate several modifications in TCP. We also investigate the possibility of prioritization at the transport layer to improve the loss recovery. The idea is to trade reliability for timeliness. We particularly examine the applicability of PR-SCTP with a focus on event logging. In our evaluation, the performance of PR-SCTP is largely influenced by small messages. We analyze the inefficiency in detail and propose several solutions. We particularly implement and evaluate one solution that utilizes the Non-Renegable Selective Acknowledgments (NR-SACKs) mechanism, which has been proposed for standardization in the IETF. According to the results, PR-SCTP with NR-SCAKs significantly improves the application performance in terms of low latency as compared to SCTP and TCP.Interactive applications such as web browsing, audio/video conferencing, multi-player online gaming and financial trading applications do not benefit (much) from more bandwidth. Instead, they depend on low latency. Latency is a key determinant of user experience. An increasing concern for reducing latency is therefore currently being observed among the networking research community and industry. In this thesis, we quantify the proportion of potentially latency-sensitive traffic and its development over time. Next, we show that the flow start-up mechanism in the Internet is a major source of latency for a growing proportion of traffic, as network links get faster. The loss recovery mechanism in the transport protocol is another major source of latency. To improve the performance of latency-sensitive applications, we propose and evaluate several modifications in TCP. We also investigate the possibility of prioritization at the transport layer to improve the loss recovery. The idea is to trade reliability for timeliness. We particularly examine the applicability of PR-SCTP with a focus on event logging. In our evaluation, the performance of PR-SCTP is largely influenced by small messages. We analyze the inefficiency in detail and propose several solutions. We particularly implement and evaluate one solution that utilizes the Non-Renegable Selective Acknowledgments (NR-SACKs) mechanism, which has been proposed for standardization in the IETF. According to the results, PR-SCTP with NR-SCAKs significantly improves the application performance in terms of low latency as compared to SCTP and TCP.
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Garroni, Paolo. "Il protocollo SCTP e il suo utilizzo nelle reti 4G e 5G". Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23100/.
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Questa tesi è uno studio del protocollo SCTP e del suo utilizzo nel piano di controllo delle reti 4G e 5G. In tali reti SCTP viene utilizzato per il trasporto dei messaggi di segnalazione in quanto in grado di garantire a livello di trasporto affidabilità, ottimizzazione delle performance, resilienza e rapidità di recupero da malfunzionamenti. La tesi introduce il contesto storico e le esigenze che hanno portato alla creazione del protocollo, analizza le caratteristiche distintive di SCTP rispetto a TCP e UDP, studia i meccanismi di funzionamento, introduce le architetture delle reti 4G e 5G e discute il ruolo di SCTP in tali reti. Infine, nell'ultimo capitolo viene mostrato e discusso un esempio di traffico SCTP catturato nel piano di controllo di una rete 5G.
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Weinrank, Felix [Verfasser] y Erwin P. [Akademischer Betreuer] Rathgeb. "SCTP as an Universal Multiplexing Layer / Felix Weinrank ; Betreuer: Erwin P. Rathgeb". Duisburg, 2021. http://d-nb.info/1230322620/34.
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Rajiullah, Mohammad. "Performance Analysis and Improvement of PR-SCTP in an Event Logging Context". Licentiate thesis, Karlstads universitet, Avdelningen för datavetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-14676.
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Due to certain shortcomings in TCP and UDP, the Stream Control Transmission Protocol (SCTP) was defined for transporting telephony signaling traffic. The partially reliable extension of SCTP, PR-SCTP, has been considered as a candidate for prioritizing content sensitive traffic and trading reliability against timeliness for applications with soft real time requirements. In this thesis, we investigate the applicability of PR-SCTP for event logging applications. Event logs are inherently prioritized. This makes PR-SCTP a promising candidate for transporting event logs. However, the performance gain of PR-SCTP can be very limited when application message sizes are small and messages have mixed reliability requirements. Several factors influence PR-SCTP’s performance. One key factor is the inefficiency in the forward_tsn mechanism of PR-SCTP. We examine the inefficiency in detail and propose several solutions. Moreover, we implement and evaluate one solution that utilizes the Non-Renegable Selective Acknowledgements (NR-SACKs) mechanism currently being standardized in the IETF, which is available in the FreeBSD operating system. Our results show a significant performance gain for PR-SCTP with NR-SACKs. In some scenarios, the average message transfer delay is reduced by more than 75%. Moreover, we evaluate NR-SACK based PR-SCTP using real traces from an event logging application called syslog. It significantly improves the syslog application performance as compared to SCTP, TCP and UDP.
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Afif, Mériem. "Interaction des mécanismes RLC/MAC et de SCTP dans les réseaux B3G". Paris, ENST, 2007. http://www.theses.fr/2007ENST0028.
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La tendance actuelle dans les réseaux de communication sans fils (EDGE/EGPRS, WLAN, AdHoc. . . ) est focalisée sur l'étude des mécanismes d'interaction inter-couches. Le travail effectué dans cette thèse porte sur l'étude des mécanismes d'interaction entre la couche transport et la couche liaison et leurs applications pour contrôler les paramètres de transmission (liés au contrôle de congestion et de flux). Après une description détaillée des fonctionnalités de base de SCTP et de ses extensions mobiles, nous présentons une analyse de performances de SCTP avec multistreaming supportant une application interactive de type HTTP1. 0 dans un environnement EDGE. Comparé au TCP, SCTP avec multistreaming améliore la qualité de service offert en évitant le problème de HOL blocking. La deuxième contribution porte sur l'amélioration de performances de handover data intra et inter réseaux d'accès. Nous proposons un nouveau chunk de contrôle SCTP, le QoS_Measurement_Chunk, qui remonte les mesures de qualité sur le lien radio, effectuées par le mobile, aux entités réseaux (SGSN et GGSN). Cette procédure, basée sur le multihoming associé à la mobilité a montré une amélioration de performances de la couche transport, comparée au SCTP standard, particulièrement pour la résolution des problèmes de dégradation de qualité en situation de handover data (EDGE/EDGE, EDGE/WLAN). Elle consiste principalement en une adaptation du flux de transmission sur la couche transport au flux de transmission au niveau liaison. C'est dans cette optique que se situe notre troisième contribution, consistant ainsi en une modélisation inter-couches (transport/liaison)Current tendency in wireless communication networks (EDGE/EGPRS, WLAN, AdHoc…) is focused on the study of cross-layer interaction mechanisms. This thesis concerns the study of interaction mechanisms between transport and link layers, and their applications to transmission control parameters (as congestion and flow control parameters). After a detailed description of the basic SCTP functionalities and its additional extensions defined to adapt SCTP to wireless contexts, we investigate the influence of multi streaming when used to transport web pages in HTTP 1. 0 transactions over SCTP in EDGE environment. SCTP does not suffer from the head of line blocking issue inherent to TCP due to its multistreaming functionality. The results show that SCTP performs better than TCP when several streams are activated at SCTP level. The second contribution relates to intra and inter radio access technologies data handover performance improvement. We propose a new SCTP control chunk, QoS_Measurement_Chunk. It allows the transmission of radio QoS measurements from the mobile to its SCTP peer. These information can be used by the SCTP layer to adapt the transmission rate to current radio transmission conditions (particularly useful in handover/reselection situation). The combined use of Qos_Measurement_Chunk with multihoming feature provide a data handover (EDGE/EDGE, EDGE/WLAN) with performance improvement. The obtained simulation results are compared to the standard SCTP presenting so better performance in terms of data throughput over the access network. The third contribution of this thesis is on cross-layer modeling (transport : SCTP/link Layer EDGE)
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Afif, Mériem. "Interaction des mécanismes RLC-MAC et de SCTP dans les réseaux B3G /". Paris : École nationale supérieure des télécommunications, 2008. http://catalogue.bnf.fr/ark:/12148/cb412755062.
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Afif, Mèriem. "Interaction des Mécanismes RLC/MAC et de SCTP dans les Réseaux Mobiles B3G". Phd thesis, Télécom ParisTech, 2007. http://pastel.archives-ouvertes.fr/pastel-00003131.
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La tendance actuelle dans les réseaux de communication sans fils (EDGE/EGPRS, WLAN, AdHoc...) est focalisée sur l'étude des mécanismes d'interaction inter-couches. Le travail effectué dans cette thèse porte sur l'étude des mécanismes d'interaction entre la couche transport et la couche liaison et leurs applications pour contrôler les paramètres de transmission (liés au contrôle de congestion et de flux). Après une description détaillée des fonctionnalités de base de SCTP et de ses extensions mobiles, nous présentons une analyse de performances de SCTP avec multistreaming supportant une application interactive de type HTTP1.0 dans un environnement EDGE. Comparé au TCP, SCTP avec multistreaming améliore la qualité de service offert en évitant le problème de HOL blocking. La deuxième contribution porte sur l'amélioration de performances de handover data intra et inter réseaux d'accès. Nous proposons un nouveau chunk de contrôle SCTP, le QoS_Measurement_Chunk, qui remonte les mesures de qualité sur le lien radio, effectuées par le mobile, aux entités réseaux (SGSN et GGSN). Cette procédure, basée sur le multihoming associé à la mobilité a montré une amélioration de performances de la couche transport, comparée au SCTP standard, particulièrement pour la résolution des problèmes de dégradation de qualité en situation de handover data (EDGE/EDGE, EDGE/WLAN). Elle consiste principalement en une adaptation du flux de transmission sur la couche transport au flux de transmission au niveau liaison. C'est dans cette optique que se situe notre troisième contribution, consistant ainsi en une modélisation inter-couches (transport/liaison). Notre approche consiste en une formulation analytique du débit utile au niveau SCTP en fonction de celui au niveau liaison dans un réseau EDGE. Cette modélisation se base sur une optimisation inter-couches efficace de bout en bout, permettant d'adapter la taille de la fenêtre de congestion à l'état du canal de transmission radio.
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Torres, Alex Junior Figueiredo. "Método para melhoria da qualidade na transmissão de vídeos sobre o protocolo SCTP". reponame:Repositório Institucional da UFPR, 2014. http://hdl.handle.net/1884/36961.
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Orientador : Prof. Dr. Eduardo Parente RibeiroCo-orientador : Prof. Dr. Carlos Marcelo Pedroso
Dissertação (mestrado) - Universidade Federal do Paraná, Setor de Tecnologia, Programa de Pós-Graduação em Engenharia Elétrica. Defesa: Curitiba, 30/04/2014
Inclui referências
Área de concentração
Resumo: A transmissão de vídeo é uma das aplicações mais importantes da rede IP na atualidade. O crescimento da demanda pela transmissão com maior resolução e qualidade pressiona a criação de técnicas de transmissão capazes de entregar a melhor qualidade de experiência possível para os usuários. O protocolo SCTP foi proposto como alternativa para os protocolos de camada de transporte em uso, apresentando a capacidade de suportar a transmissão multicaminhos. Nesta dissertação, é proposto o uso de uma nova estratégia de troca de caminho utilizando a tendência do atraso fim a fim como critério, com o objetivo de preservar a qualidade do vídeo transmitido sobre a rede IP. O desempenho do sistema é analisado utilizando simulações computacionais e os resultados indicam que o uso do método proposto resulta em menor degradação da qualidade de vídeo quando ocorre variação na latência fim a fim. Palavras-chave: Multi-abrigado. Latência. MACD.
Abstract: Video transmission is one of the most important applications of IP network nowadays. The growth in demand for video transmission with higher resolution and quality pushes the creation of techniques to deliver the best possible quality of experience to users. The SCTP has been proposed as an alternative to transport layer protocols in use, with the ability to support multipath transmission. In this dissertation, we propose the use of a new handover strategy using the path end-to-end delay as a criterion. This strategy is designed to preserve the quality of video transmitted using IP networks. The system performance is analyzed through computer simulations and the results show that the use of proposed method prevents degradation of video quality. Key words: Multi-homing. Latency. MACD.
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Alowaidi, Majed. "Performance Improvement of Smart Grid Communications Using Multi-homing and Multi-streaming SCTP". Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/22735.
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With the obvious evolution and acceleration of smart grid, it is crucial for its
success to rely on a solid transmission protocol among its peripherals due to its real
time streaming. TCP is the well known traditional transport protocol used for a
reliable transmission, and is a major player for smart grid. However, it lacks a fault
tolerance transmission method that overcomes potential failures which may mitigate
smart grid progress and in its turn decrease its reliability. We propose that smart
grid operators utilize SCTP as the principle transport protocol for their smart grid
communications, by using the two very significant characteristics offered by SCTP
multi-homing and multi-streaming respectively. Thus, we argue that they can override
two major obstacles caused by TCP Head of Line Blocking (HLB) and the inability
of handling automatically two or more paths to a final destination. Although SCTP
resembles TCP in many aspects, SCTP can definitely play a dominant role in many
current and future applications due to its key features that do not exist in TCP. We
have used ns2.34 simulator as the tool whom we relied on to investigate whether or
not smart grid may benefit over TCP by the two SCTP features, and have analyzed
the output of simulated results by using other analytical tools. As we obtain results,
we argue that smart grid operators should rely on SCTP as a feasible transmission
protocol instead of TCP.
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Ali, Rashid. "Performance of Network Redundancy in SCTP : Introducing effect of different factors on Multi-homing". Thesis, Högskolan Väst, Institutionen för ekonomi och it, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-3198.
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The main purpose of designing the Stream Control Protocol (SCTP) was tooffer a robust transfer of traffic between the hosts over the networks. For this reasonSCTP multi-homing feature was designed, in which an SCTP sender can access destinationhost with multiple IP addresses in the same session. If the primary path between the sourceand the destination is down, the traffic may still be sent to the destination by utilizingredundant path. And SCTP multi-homing also supports for the concurrent multipathtransfer of traffic. This paper introduces the effect of different network factors likeconcurrent cross traffic, congestion control algorithms and SACK timers on multi -homingfeature of SCTP. Throughput and end-to-end packet delay were used as performancemetrics to introduce the effect of these factors. From the study it was introduced thatconcurrent cross traffic in the network behaves same on multi -homed interfaces and bothinterfaces were affected almost same. It was concluded that congestion control algorithmsalso affects on multi-homing, the RED congestion control algorithm reduced delay andimproved throughput of the SCTP multi-homing. In RFC4960 recommended SACK timeris 200ms, but when 100ms SACK timer was used with concurrent multipath transfer inSCTP (CMT-SCTP) multi-homing, the high throughput and low delay was achieved ascompared with 200ms and 300ms, which indicated that different SACK timers affects onmulti-homing feature of SCTP. All the simulation works have been conducted in NS2network simulator.
26
Carmo, Gustavo Salvadori Baptista do. "Peer-to-peer com a utilização do SCTP para aplicativos de compartilhamento de arquivos". Universidade Federal de Uberlândia, 2006. https://repositorio.ufu.br/handle/123456789/12521.
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Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorPeer-to-peer networks provide an efficient way for sharing computer resources. The transport layer underlies these networks. On the Internet, TCP and UDP are the mostly used protocols in this layer. SCTP is another transport layer protocol: related to TCP and UDP, SCTP offers additional functionalities that makes it more suitable to certain kinds of applications. This work aims to show the viability of the use of SCTP as the transport layer protocol for peer-to-peer file sharing applications, using the peculiar functionalities of this protocol to satisfy the needs of these applications in a more efficient way.
As redes peer-to-peer oferecem uma forma eficaz para o compartilhamento de recursos dos computadores. Sob essas redes está a camada de transporte. Na Internet, os protocolos mais utilizados nessa camada são o TCP e o UDP. Outro protocolo da camada de transporte e o SCTP, que oferece funcionalidades adicionais em relação ao TCP e ao UDP que o tornam mais apropriado a determinados tipos de aplicações. Este trabalho tem como objetivo mostrar a viabilidade da utiliza¸são do SCTP como protocolo da camada de transporte em aplicativos peer-to-peer de compartilhamento de arquivos, fazendo uso das funcionalidades peculiares a esse protocolo para satisfazer de forma mais eficaz as necessidades destes aplicativos.
Mestre em Ciência da Computação
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Connie, Ashfiqua Tahseen. "Efficient transmission of error resilient H.264 video over wireless links". Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/1979.
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With the advent of telecommunication technology, the need to transport multimedia content is increasing day by day. Successful video transmission over the wireless network faces a lot of challenges because of the limited resource and error prone nature of the wireless environment. To deal with these two challenges, not only the video needs to be compressed very efficiently but also the compression scheme needs to provide some error resilient features to deal with the high packet loss probability. In this thesis, we have worked with the H.264/ Advanced Video Coding (AVC) video compression standard since this is the most recent and most efficient video compression scheme. Also H.264 provides novel error resilient features e.g. slicing of the frame, Flexible Macroblock Ordering (FMO), data partitioning etc.
In this thesis, we investigate how to utilize the error resilient schemes of H.264 to ensure a good quality picture at the receiving end. In the first part of the thesis, we find the optimum slice size that will enhance the quality of video transmission in a 3G environment. In the second part, we jointly optimize the data partitioning property and partial reliability extension property of the new transport layer protocol, Stream Control Transmission Protocol (SCTP). In the third and last part, we focus more on the network layer issues. We obtain the optimum point of application layer Forward Error Correction (FEC) and Medium Access Control (MAC) layer retransmission in a capacity constrained network. We assume that the bit rate assigned for the video application is more than the video bit rate so that the extra capacity available can be used for error correction.
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Immonen, Mia. "SIGTRAN : Signaling over IP -- a step closer to an all-IP network". Thesis, KTH, Mikroelektronik och Informationsteknik, IMIT, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92285.
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The mass popularization of telecommunication services in recent years have resulted in a heavily loaded signaling network. The Signaling System number 7 (SS7) is used in fixed and wireless networks and is needed for call control and services such as caller ID, roaming, and for sending SMS. The traditional SS7 networks are expensive to lease and to expand, hence a new suite of protocols have been designed to carry signaling messages over IP. This suite contains a transport protocol called Stream Control Transmission Protocol (SCTP) and various user adaptation layer protocols such as M2PA, M2UA, M3UA, and SUA. To transport the highly loss and delay sensitive signaling messages over IP, it is mandatory that the transport protocol meets the high performance requirements of SS7. Not before the IP-solution has been tested in detail, will it replace significant parts of the national telephone network. In this thesis, the failover duration in the case of link failure was tested using the feature of SCTP called multi-homing. The results suggest that carrying SS7 signaling traffic over IP is possible, since the failover duration does not exceed the required limit.Under de senaste åren har telekommunikationstjänster blivit allt mer populära, vilket har lett till ett tungt belastat signaleringsnätverk. The Signaling System number 7 (SS7) används i fasta och trådlösa nätverk och behövs för att kontrollera telefonsamtal och för tjänster såsom caller ID, roaming och för att skicka SMS. De traditionella SS7- nätverken är dyra att hyra och att expandera, varför en ny grupp av protokoll har designats för att bära signaleringsmeddelanden över IP. De nya protokollen innehåller ett transportprotokoll som heter Stream Transmission Control Protocol (SCTP) och flera adaptionslagerprotokoll, bl.a. M2PA, M2UA, M3UA och SUA. För att transportera de förlust- och förseningskänsliga signaleringsmeddelandena över IP, måste transportprotokollet möta de höga krav som SS7 har. Inte förrän IP-lösningen har testats ingående, kommer den att ersätta betydelsefulla delar av det nationella telefonnätet. I detta examensarbete har failovertiden mätts då en nätverkslänk mellan två noder har utsatts för ett avbrott. Resultaten pekar på att det är möjligt att bära SS7-trafik över IP eftersom failovertidskraven inte överstigs.
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Khalid, Muhammad Naveed. "Simulation Based Comparison of SCTP, DCCP and UDP Using MPEG-4 Traffic Over Mobile WiMAX/IEEE 802.16e". Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-4793.
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With the advent of new multimedia applications the demand for in time delivery of data is increased as compared to the reliability. Usually the Transport Layer Protocols, User Datagram Protocol (UDP) and Transmission Control Protocol (TCP) are used to transfer the data over the IP based network like Internet. TCP provides a reliable mechanism to transfer the data but its reliable mechanism results in increase in delay. UDP lacks in providing any acknowledgment mechanism and it does not provide any congestion control mechanism also. However the unreliable behavior of UDP results in less delay in data transfer. Now a days one of the important issues is the Quality of Service (QoS) assurance as the behavior of transport layer protocols can affect the QoS. So in order to avoid these issues some new transport layer protocols have been developed by Internet Engineering Task Force (IETF). Two important transport layer protocols, Datagram Congestion Control Protocol (DCCP) and Stream Control Transmission Protocol (SCTP) are used in this study. DCCP is specially designed to avoid congestion in the network. DCCP is suitable for in time delivery of data and also for its congestion control mechanism. DCCP is an unreliable transport layer protocol, as the real time applications demands for in time delivery rather than reliability. SCTP is another transport layer protocol that provides reliable data transfer. In this research work performance of SCTP, DCCP and UDP has been evaluated using MPEG-4 video over Mobile WiMAX/IEEE 802.16e. The performance of these three transport layer protocols is analyzed in terms of performance metrics like packet loss, jitter, delay and throughput. By analyzing these performance measures it is found that the performance of DCCP and SCTP is much better as compared to UDP but DCCP gives much better performance then SCTP when compared in terms of throughput and packet loss. Comparing SCTP and DCCP with UDP in terms of delay and jitter shows that UDP has less delay and jitter as compared to SCTP and DCCP, but because of less throughput and large number of packet loss, UDP can badly degrade the video quality. So, it is found that the DCCP is the most suitable transport layer protocol for transportation of MPEG-4 traffic over Mobile WiMAX/IEEE 802.16e.
30
Kamal, Humaira. "SCTP-based middleware for MPI". Thesis, 2005. http://hdl.handle.net/2429/16605.
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SCTP (Stream Control Transmission Protocol) is a recently standardized transport
level protocol with several features that better support the communication requirements
of parallel applications; these features are not present in traditional TCP
(Transmission Control Protocol). These features make SCTP a good candidate as
a transport level protocol for MPI (Message Passing Interface). MPI is a message
passing middleware that is widely used to parallelize scientific and compute intensive
applications. TCP is often used as the transport protocol for MPI in both local
area and wide-area networks. Prior to this work, SCTP has not been used for MPI.
In this thesis, we compared and evaluated the benefits of using SCTP instead
of TCP as the underlying transport protocol for MPI. We redesigned LAM-MPI,
a public domain version of MPI, to use SCTP. We describe the advantages and
disadvantages of using SCTP, the necessary modifications to the MPI middleware to
use SCTP, and the performance of SCTP as compared to the stock implementation
that uses TCP.Science, Faculty of
Computer Science, Department of
Graduate
31
He, Ming-Syun y 何明勳. "Enhancing SCTP for Simultaneous Handover". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/r4wb42.
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碩士國立中正大學
資訊工程研究所
101
The Stream Control Transmission Protocol (SCTP) is an end-to-end transport layer protocol. The SCTP standard does not provide location management and handover management with simultaneous mobility. In this article, we propose two handover management mechanisms to facilitate SCTP simultaneous handover, that is, SCTP handover management Binding And Update (SCTP-BAU) and SCTP handover management Update and Forward Binding (SCTP-UFB). We enhance the SCTP with Serving Node that provides handover management in subnets. When MN locates in different subnets, MN will change Serving Node, that is, Serving Node is distributed design. MN and CN provide their corresponding Serving Node IP Address when the SCTP four-way handshake to set up an association. In SCTP-BAU, when MN performs handover to different subnets, MN will send SCTP ASCONF binding update to CN and CN’s Serving Node in SCTP-BAU handover mechanism. Also, MN will send MN’s new IP Address to MN’s old Serving Node through MN’s new Serving Node. When both of the communicating MNs change their IP Address simultaneously, they lose their corresponding SCTP ASCONF binding updates. At the same time, both of MN and CN send SCTP ASCONF binding update to their corresponding Serving Node. The corresponding Serving Nodes will forward SCTP ASCONF binding update to their MNs’ new IP Address. MN will send SCTP ASCONF-ACK to CN when MN receives SCTP ASCONF binding update from CN. After MN and CN receive SCTP ASCONF-ACK, they will recover the previous SCTP association. We propose two distributed Serving Node handover mechanisms that enhance the centralized mechanism. Analytical results present that both of our schemes can shorten the total handover delay.
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Huang, Yu-Kai y 黃裕凱. "Improved Security Protocols for SCTP". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/p9q5va.
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碩士國立中山大學
資訊工程學系研究所
97
With fast and prosperous development in communication technology, desktop or mobile devices may be equipped with wired and wireless network interfaces. Hence, users need a multihoming technique to help them making use of the network in- terfaces effectively. The Stream Control Transmission Protocol (SCTP) is a new transport protocol approved by the SIGTRAN Working Group of IETF (Internet Engineering Task Force) as RFC 2960 in October 2000 where it includes this useful characteristic. However, this feature may lead to some secure pitfalls. In this thesis, we come up with some approaches to improve SCTP against some existing tough problems raised from multihoming and provide more sufficient protection methods based on cryptography. Finally, a comparison of the existing security solutions is also given to demonstrate our contributions.
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Wang, Jian-Ren y 王健任. "Jitter-based SCTP: Improving SCTP performance by jitter-based congestion control over wired-wireless networks". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/w488gs.
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碩士國立中央大學
資訊工程研究所
94
With the evolution of communication networks, wireless networks gradually become the most adaptive communication networks in next generation internet. Desktops and mobile devices may be equipped with multiple wired and/or wireless network interfaces. Stream Control Transmission Protocol (SCTP) has been proposed for reliable data transport and its multihoming feature makes use of network interfaces effectively to improve performance and reliability. However, like TCP, SCTP suffers unnecessary performance degradation over wired-wireless heterogeneous networks. The main reason is that original congestion control scheme of SCTP cannot differentiate loss events so that SCTP reduces the congestion window inappropriately. In order to solve this problem and improve performance, we propose a jitter-based congestion control scheme with end-to-end semantics over wired-wireless networks. Besides, we amend decision policy of jitter ratio loss distinction to make it more correctness and robustness. Available bandwidth estimation scheme will be integrated into our congestion control mechanism to make the bottleneck more stabilized. Simulation experiments reveal that our scheme (JSCTP) gives prominence to improve performance effectively over wired-wireless networks.
34
Liu, Tsein-I. y 劉謙易. "D-SCTP: Multi-path Transmission for Distributed End Hosts Using Stream Control Transmission Protocol (SCTP)". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/80168724465018397753.
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碩士國立成功大學
資訊工程學系碩博士班
95
“Multihominig” technique enables a host/site to connect to the Internet through more than one link. Stream Control Transmission Protocol (SCTP), which is a transport layer protocol for multihoming, allows a multihomed host to establish multiple paths towards its endpoint. Concurrent Multi-path Transfer (CMT)-SCTP extends the base SCTP to allow an SCTP host to transmit new data to its endpoint through multiple paths at the same time. However, in CMT-SCTP, an association (SCTP’s term for “connection”) is still limited exactly between two end hosts. In this thesis, a new SCTP extension protocol, namely “D-SCTP”, is proposed to achieve concurrent multi-path transmission over multiple end hosts within a single SCTP association. In addition to the existing features provided by SCTP and CMT-SCTP, an Add Path Procedure and a Delete Path Procedure are designed. Paths destined to different hosts can thus be dynamically added and deleted in an existing association at any time. Furthermore, issues related to D-SCTP are investigated in this thesis. A TSN assignment adjustment mechanism and a new SACK generation algorithm are also devised to tackle the side-effects caused by concurrent multi-path transmission across multiple end hosts. The simulation results in this thesis also show that, the mechanisms provided by D-SCTP can dynamically add/delete hosts to transfer data concurrently. Thus, D-SCTP is very adequate for the development of applications such as FTP services and P2P data transfer, to improve the efficiency of data transmission.
35
Unurkhaan, Esbold [Verfasser]. "Secure end-to-end transport over SCTP : a new security extension for SCTP / von Esbold Unurkhaan". 2005. http://d-nb.info/975686569/34.
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Chang, Chen-Wei y 張辰瑋. "FHR-SCTP : The Research of A Quality Aware SCTP Congestion Control Mechanism to Improve Handover Efficiency". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/sq7wk3.
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碩士淡江大學
電機工程學系碩士班
102
In the high-tech society, the technique of network and the mobile devices have become mature nowadays. All user usually surf the internet on the mobile device with mobile network, but all the base station have limit service range. Therefore, handover occurs all the time in our life. How to surf the internet with high efficiency during handover is a big issue. SCTP was accepted by IETF in 2000, and SCTP included in the standard of RFC4960.SCTP, TCP and UDP are a transport protocol in OSI network structure. SCTP has advantages of TCP and UDP. The outstanding feature of SCTP is Multi-stream and Multi-homing. Multi-homing that the devices could contain two or more networking interface is suit to implement soft-handover. However, there are still some negative effects by congestion control mechanism of SCTP during handover, the transmission rate will greatly decline during handover. This paper presents a Fast Handover Recover - SCTP (FHR-SCTP) mechanism. It improves the mechanism that is presented by the paper of SCTP Efficient Flow Control During Handover (SCTP-EFC), and it can fast recover the CWND after handover. Besides inheriting the CWND of the old primary path to the new primary path, it sets the ssthresh of the new primary path to initial value after handover. It make the CWND of the new primary path increase by slow-start phase and quickly own maximum transmission traffic. Last, if FHR-SCTP handover to poor quality path, maybe the CWND is too large for the new primary path and makes the new primary path cannot afford the traffic volume. So, we store the TSN (Transmission sequence number) to calculate the dropped packet size before handover. If it occurs packet losing at first time after handover, we should decrease the CWND by the dropped packet size. The result shows that FHR-SCTP is more efficient than SCTP and SCTP-EFC .FHR-SCTP improves the time of reaching the max CWND about 0.83% to 42.5% with other mechanisms after handover, and when the CWND of FHR-SCTP reaches the max CWND after handover, FHR-SCTP transmits more than 0%~41.72% packet size with SCTP and SCTP-EFC.
37
Tai, Cheng-feng y 戴丞峰. "Adaptation Load Balancing Scheme Using SCTP". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/mf984q.
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碩士朝陽科技大學
資訊管理系碩士班
93
Through developing protocol on the network recent years, the Stream Control Transmission Protocol (SCTP) proposed by IETF can improve problems in efficiency and security of TCP over network of transmitting data. Multi-homing is the major feature of SCTP. However, Multi-homing was only applied in heartbeat chunk on redundancy scheme and retransmission in RFC2960. Hence, the utilization of network cannot be improved efficiently. Load balancing schemes usually use weight to assign packets without considering influences on arrival rate dependent and service rate. In this thesis, we modify the data chunk field and assign the packets to other available paths by using their congestion control, respectively. Besides, we extended and modified ARD (Arrival Rate Dependent) to A-ARD (Adjusted – Arrival Rate Dependent) which counts the weight dynamically and finally used NS2(Network Simulator-Version 2) to simulate the proposal. The simulation result shows that the proposed approach can adjust the weight intelligently, and promotes the utilization of whole SCTP network.
38
Tseng, Cheng-Liang y 曾成良. "A Modified SCTP with Load Balancing". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/32757007862475518786.
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碩士國立中山大學
電機工程學系研究所
91
To support the transmission of real-time multimedia stream, Stream Control Transmission Protocol (SCTP) developed by IETF is considered to be more efficient because of its high-degree expandability and compatibility. Today we can observe that instead of using SCTP may become the transmission protocol of next-generation IP network. In this Thesis, we propose a mechanism to upgrade TCP and UDP, the multi-home feature of SCTP to ensure that multiple paths can exist between two SCTP ends. Not only can the primary path continue to function, but the secondary paths covey part of data packets once the network congestion occurs. Considering the dynamic change of our Internet, the proposed mechanism can enhance the effectiveness of SCTP data transmission, and increase overall network utilization. Cutting user data into chunks in SCTP, we can analyze the transmission performance of individual path by measuring the transmission delay from the sender to the receiving end. By modifying the simulator of NS-2, we set up different topologies in the experiment to analyze the performance of our mechanism. We compare the modified SCTP with the original SCTP to highlight our proposed mechanism in increasing throughput and network utilization by adjusting the background traffic on the paths.
39
Liao, Ming-yi y 廖明沂. "Design and Implementation of SCTP Proxy". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14299058454556886061.
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碩士朝陽科技大學
資訊工程系碩士班
95
Transmission Control Protocol (TCP) is one of the most major transport layer protocols with characteristics of reliable transmission and strict ordering. However, the function of strict ordering causes the latency of transmission, called Head-Of-Line (HoL) Blocking when the packet loss happens. This is due to the delay of retransmission for the lost packets. On the other hand, the three-way handshake in TCP can be cracked easily. Internet Engineering Task Force (IETF) proposed the Stream Control Transmission Protocol (SCTP) with characteristics of multi-streaming, multi-homing. Also, the four-way handshake in SCTP could avoid the denial of service (DoS) attacks. However, Most of the current network equipments do not support the SCTP protocol, in this thesis, we proposed the design and implementation of SCTP tunnel proxy. The SCTP tunnel proxy could support the communication between TCP networks, and uses SCTP to transmit the data between TCP networks reliability with the advantage of SCTP.
40
Wu, Jung-Hung y 吳榮宏. "A Study and Application of SCTP Protocol". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/y9r69z.
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碩士國立高雄第一科技大學
電腦與通訊工程所
96
The stream control transmission protocol (SCTP) is a new transport layer protocol developed by the Internet Engineer Task Force (IETF) in RFC2960 (Request for Comments). SCTP was originally designed to transport PSTN signaling messages over IP networks. SCTP is similar to TCP. SCTP offers a point-to-point, connection-oriented, reliable delivery transport service for applications communicating over an IP network. But because TCP found some restrictions, and SCTP has a lot of characteristics, such as multi-homing , multi-streaming , 4- way handshake and cookie safe mechanism, etc. To improve and transmit the throughput and efficiency, and can prevent from and is attacked blindly. In this paper, we describe basic operation on the Association of SCTP and discuss the features of SCTP : cookie ,multi-homing , multi-streaming , etc. Then to make SCTP package to observe in fact. Finally, utilization multi-homing characteristic of SCTP , The seamless handover simulation in ns2 for UMTS and WLAN integration, and then propose IS handover scheme to improve UMTS congestion traffic.
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Gu, Hao-Xiang y 顧皓翔. "SCTP-based Service Migration for VOD Service". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/8x7u6c.
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碩士國立高雄應用科技大學
電子工程系
105
With the popularized of broadband Internet service, multi-media streaming service became feasible and widely embraced. Among others, Video on Demand (VOD) is one of the most important applications of streaming service. It delivers personalized content to individual users. Moreover, with the technical mature of mobile networking, users now can have access to VOD service anywhere at any time. In a mobile networking environment, a mobile user has VOD service from its initially nearest server. However, as the user move farther away from the initial server, the service quality as well as user experience will degrade accordingly. To this problem, a new approach, named SCTP-based Service Migration, is proposed in this thesis. The proposed approach migrates an ongoing service from an old server to a new proximity server in order to retain the service on the move. It takes the advantages of multi-streaming and multi-homing features of SCTP. The mechanisms for service migration are implemented in the form of plug-in at server-side and client-side to maximize application software independency. A fully functional prototype shows the feasibility of the proposed approach and its potential in the industry. The effects of different parameter settings are also examined in this study. In this thesis, a service migration system has been designed to solve this problem and can be plugged into an any media player with Video on-demand. The purposes are to follow the mobile users to search the nearby VOD servers with better transmission quality, and take over the current service to offer a better service quality. The transmission system protocol is based on the stream control transmission protocol and makes use of its multi streaming and multi-homing paths in order to improve the transmission quality and to provide a better experience to the mobile users. After each service migration, the results of the study would have least then 3 second video backtrackings or Video jumping.
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Wang, Xiao Lei. "Performance evaluations for multimedia applications over PR-SCTP". Thesis, 2005. http://hdl.handle.net/2429/16406.
Texto completoResumen
As multimedia applications over the Internet proliferate, the efficient transport of both
the signaling and multimedia data becomes increasingly important. Transmission Control
Protocol (TCP) and User Datagram Protocol (UDP), the two most widely used but limited
transport protocols, are not well suited to contemporary multimedia applications involving
digital voice, audio and video communications. In recent years, a new transport protocol,
SCTP, has attracted much attention in the technical community. Compared to TCP and UDP,
SCTP is considered to meet the requirements for a wider set of applications. With the
extension of the partial reliable SCTP (PR-SCTP), SCTP provides an even more flexible
transport service.
We propose schemes to effectively apply PR-SCTP to multimedia signaling and real
media data. In this thesis, our proposed scheme for multimedia signaling is SIP over PRSCTP.
In this scheme, SIP messages are sent with either partial reliable, reliable or unreliable
services according to their types and requirements, Both application and transport layer
retransmission mechanisms are properly coordinated to efficiently retransmit lost data. Our
proposed differentiated services of PR-SCTP are applied to multimedia data. In this scheme,
therefore, network resources are used more efficiently by treating media data differently.
The performance of SIP over UDP, SCTP and PR-SCTP are compared in the thesis.
Simulation results show that, compared with UDP and SCTP, the proposed scheme using
PR-SCTP improves the performance of SIP transport under both high and low SIP traffic.
The scheme for running multimedia data over PR-SCTP achieves more successful
transmissions for high-priority messages in a congested network.Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
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Roodi, Meysam. "Multi server video streaming using SCTP transport protocol". 2007. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=452848&T=F.
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Zhang, Dong. "Performance analysis of iSCSI over TCP versus SCTP". 2008. http://hdl.handle.net/1993/21284.
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Huang, Wei-Che y 黃偉哲. "Comparison of MTP and SCTP for SS7 Signaling". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/76560804269012147846.
Texto completoResumen
碩士國立交通大學
資訊工程系所
92
Signaling System Number 7 (SS7) signaling provides control and management functions in the mobile telecommunications network. Traditional SS7 signaling is implemented in Message Transfer Part-based network, which is utilized in the existing mobile networks. In Universal Mobile Telecommunication System (UMTS) all-IP architecture, the SS7 signaling transport will be carried by IP-based network. In this paper, we design and implement Message Transfer Part-based SS7 signaling transport and Stream Control Transmission Protocol-based SS7 signaling transport for UMTS all-IP network. We compare of these two approaches in three perspectives: message format, connection setup, and data transmission/ack. We also illustrate the performance of our implementations by using the Send Authentication Info procedure defined in 3GPP Technical Specification 23.060.
46
Lin, Huan-Jie y 林煥傑. "A Study on Mobile SCTP over Wireless Network". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/5mzktq.
Texto completoResumen
碩士朝陽科技大學
網路與通訊研究所
94
The data transmission is not limited by the physical line in the wireless networks. Mobile SCTP is defined to support transport layers mobility management and to achieve a better transmission quality. The original mobile SCTP only considers the signal strength that MN receives but does not take the bandwidth contention situation and bandwidth allocation situation into account in the wireless network domain. This thesis analyzes Base Station bandwidth resource distribution for contention based and allocation based mechanism. From the simulation result, the dynamic handoff mechanism using mobile SCTP will achieve a better transmission quality and performance.
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Hsu, Shih-Hsuan y 許世軒. "STUDY OF A LOAD BALANCING SCHEME USING SCTP". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/26027679049672163379.
Texto completoResumen
碩士大同大學
資訊工程學系(所)
94
SCTP (Stream Control Transmission Protocol) is a new general purpose transport layer protocol and it had been released by IETF (Internet Engineering Task Force) for standard. There are many features which make SCTP powerful. But in [2], IETF did not recommend us to use SCTP multi-homing feature for load balancing because they want to use the backup paths to maintain the robustness of a network. In this paper, we proposed a load balancing system which was based on SCTP. But it did not affect the original idea of SCTP. Therefore, we can enhance the availability of the backup paths and then improve the throughput of the SCTP users. Additionally, we also proposed some schemes which can make our load balancing system more efficiency in MANET (Mobile Ad hoc Networks).
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Ko, Yu-Bo y 戈玉帛. "A STUDY OF SEAMLESS HANDOFF BASED ON SCTP". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/65460036317204723690.
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碩士大同大學
資訊工程學系(所)
97
The Stream Control Transmission Protocol (SCTP) is a Transport Layer protocol and shares the same features with the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP). Besides, it also boasts many more features and has become a standard protocol. Mobile SCTP (mSCTP) is defined as SCTP with the ADDIP extension. It is intended to enable SCTP to be applicable to the mobile network environment. Although mSCTP has solved the problem with the dynamic increase of IPs in wireless network, the key to the concern about IP mobility lies in location and handoff. mSCTP only solves the handoff problem; it is relatively effective only when there is a mobile node on one end and a fixed point on the other and can offer seamless handoff switch. However, when both parties of a communication are mobile nodes, the communication may be interrupted because of path selection errors. To allow both parties to obtain effective communication support while moving, this paper offers an mSCTP-based seamless handoff mechanism that provides a solution for the problem. In the last part, we try to use NS-2 (Network Simulator- Version 2) to prove the applicability of the proposed method.
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Lin, Yu-Cheng y 林育正. "Analysis of Load Balancing in NEMO using SCTP". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/21055070867933244462.
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碩士大同大學
資訊工程學系(所)
97
At present the load balancing scheme is very important. In MANET, it had load balancing that using multi-homing of SCTP. In NEMO, Mobile Router as gateway in Mobile Network like head node in MANET. Mobile Router wills probably traffic congested and then cause transmission time increased. To avoid traffic congested on Mobile Router, we propose scheme that is using SCTP to provide load balancing in NEMO. In this paper will analyze performance of load balancing that using SCTP in NEMO.
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Chen, Min-Chin y 陳旻槿. "Quality Aware SCTP Path Management in Wireless Network". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/33736380584596148807.
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碩士國立中正大學
通訊工程研究所
95
SCTP (Stream Control Transmission Protocol) is a new transport layer protocol and published as RFC2960 by IETF (Internet Engineering Task Force) in October 2000. SCTP provides both reliable ordered and unordered transport services. The congestion control and flow control mechanisms of SCTP are very similar to those of TCP. SCTP can use more than one IP addresses to establish association. The SCTP multi-homing can support multi-path in association. It provides SCTP with a certain network level fault tolerance by the use of network address redundancy.The SCTP Multi-homing has a tremendous transmission potential. But the SCTP Path Management is very simple in RFC2960, so it can''t effectively distinguish path condition (e.g.active or inactive) and has no path switch strategy suitable for wireless network. This will deteriorate SCTP performance.In this research, we present a new Path Management (Quality Aware-SCTP) in wireless network, including new path failure detection method and ICE (Idle Path Congestion Window Size Estimation) mechanism. Through experiment under NS2, Quality Aware-SCTP can effectively identify the condition of path and quickly switch to suitable path while Primary Path condition is bad. Quality Aware-SCTP is not only simple but also increases performance.