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Author by : 劉謙易
Languange Used : en
Release Date : 2007
Publisher by :
ISBN : OCLC:772840701
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Author by : Victor C.M. Leung
Languange Used : en
Release Date : 2012-12-19
Publisher by : CRC Press
ISBN : 9781466566989
Although multihomed communication is a rapidly emerging trend for next generation networks, no known book explores multihomed communication with the Stream Control Transmission Protocol (SCTP). Filling this void, Multihomed Communication with SCTP (Stream Control Transmission Protocol) explains this innovative feature that allows an endpoint to simultaneously maintain and use multiple points of connectivity to the network—making it possible for fixed and mobile users to connect to the Internet via multiple service providers or last hop technologies. Among the topics addressed, the book covers: Support of node mobility between networks Concurrent multipath transfer using SCTP multihoming Low delay communication and multimedia applications High performance computing using commodity hardware and software SCTP support in the INET framework and its analysis in the Wireshark packet analyzer SCTP application interface Ideal for researchers and programmers, this forward-looking reference describes SCTP multihoming concepts and implementation, applications of multihoming across different domains, and proposed extensions such as multipath transfer and mobility. Although the book is aimed at those with an advanced background, it also covers the fundamental concepts and mechanisms of SCTP multihoming to help anyone get up to speed on SCTP....
Stream Control Transmission Protocol Sctp
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Author by : Randall R. Stewart
Languange Used : en
Release Date : 2002
Publisher by : Addison-Wesley Professional
ISBN : UCSD:31822031049786
CD-ROM contains: Open source code needed for user space implementation of SCTP presented in text...
End To End Concurrent Multipath Transfer Using Transport Layer Multihoming
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Author by : Janardhan R. Iyengar
Languange Used : en
Release Date : 2006
Publisher by :
ISBN : 0542720450
Transport layer multihoming binds a single transport layer association to multiple network addresses at each endpoint, thus allowing the two end hosts to communicate over multiple network paths. This dissertation investigates end-to-end Concurrent Multipath Transfer (CMT) using transport layer multihoming for increased application throughput. CMT is the simultaneous transfer of new data from a source host to a destination host via two or more end-to-end paths. We investigate and evaluate design considerations in implementing CMT at the transport layer using the Stream Control Transmission Protocol (SCTP) as an example of a multihome-capable transport layer protocol. Specifically, we explore (i) algorithms for CMT at the transport layer, (ii) retransmission policies for CMT, and (iii) performance implications of a bounded receive buffer on CMT. We identify three negative side-effects of reordering due to CMT that must be managed before the full performance gains of CMT's parallel transfer can be achieved. We propose three algorithms to eliminate these side-effects: the Split Fast Retransmit algorithm (SFR) to handle unnecessary fast retransmissions by a sender, the Cwnd Update for CMT algorithm (CUC) to counter overly conservative congestion window growth at a sender, and the Delayed Ack for CMT algorithm (DAC) to curb an increase in ack traffic due to fewer delayed acks by a receiver. These algorithms demonstrate that a single sequence space within a transport layer association is sufficient for CMT; separate sequence spaces per path are not required. We propose and evaluate five retransmission policies for CMT. Introducing these retransmission policies causes two side-effects: occurrence of spurious retransmissions and inaccurate congestion window estimation. We propose two protocol modifications to eliminate these side-effects. Using simulation, we evaluate CMT against AppStripe, a simulated idealized application that stripes data over multiple paths using multiple SCTP associations. The results of this evaluation demonstrate that CMT's sharing of sequence space across paths improves performance---an inherent benefit that load sharing at the transport layer has over that at the application layer. We study the performance of CMT in the presence of a bounded receive buffer (rbuf). Simulation results show that if two paths are used for CMT, the lower quality (i.e., higher loss rate) path degrades overall throughput of an rbuf-constrained CMT association by blocking the rbuf. (Abstract shortened by UMI.)....
Multitrouting Behavior In Stream Control Transmission Protocol
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Author by : Jagdish Kumar Gopalakrishnan
Languange Used : en
Release Date : 2003
Publisher by :
ISBN : OCLC:53208135
ABSTRACT: In the end, we prove that by having the multirouting, SCTP performs better in terms of higher rate of data transmission....
Sctp
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Author by : Randall R. Stewart
Languange Used : en
Release Date : 2003
Publisher by :
ISBN : 7900643958
责任者译名:斯图尔特。...
Sctp Based Concurrent Multipath Transfer In The Contexts Of Multihop Wireless Networks And Tcp Friendliness
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Author by : Ilknur Aydin
Languange Used : en
Release Date : 2010
Publisher by :
ISBN : 1124240438
A multihome-capable transport layer protocol allows an application to transmit data via multiple (disjoint) paths simultaneously, a scheme termed concurrent multipath transfer (CMT). SCTP is an IETF-standardized transport layer protocol with built-in multihoming capability. In prior work, a CMT protocol using SCTP multihoming (termed SCTP-based CMT) was proposed and investigated for improving application throughput in wired networks. In that effort, SCTP-based CMT was studied in (bottleneck-independent) wired networking scenarios with ns-2 simulations. This dissertation studies SCTP-based CMT in two specific contexts using QualNet simulations: (i) CMT over Multihop Wireless Networks (MWNs), and (ii) TCP-friendliness of CMT in the Internet. CMT over MWNs: Given the recent advances in multiple-radio nodes, multichannel radios, and multi-path routing, more multihomed nodes are deployed in the wireless networks. This trend motivated us to study two specific issues in the context of CMT over MWNs. The first issue concerns the performance of CMT over MWNs, where we studied how the contention-induced losses and the wireless channel characteristics impact the performance of CMT. We found that similar to the wired cases, CMT over MWNs showed better performance than one single-homed SCTP association and even the ideal AppStripe application, when the receiver buffer (rBuf) was unconstrained. For the cases of constrained rBuf, we showed that considering the bandwidth limitations of multihop wireless networks compared to their wired counterparts, rBuf sizes bigger than 128 KB can be sufficiently enough not to restrain the CMT performance. Overall, we concluded that applications will benefit from using CMT in the MWNs context when they have sufficiently large rBuf. The second issue concerns the acknowledgment (ACK) mechanism of CMT, where we investigated different design choices for the ACK mechanism of CMT in MWN to mitigate the effects of contention-induced losses in the multihop wireless channels among data and ACK traffic. According to the ACK policy of the original CMT, an ACK packet is sent to the path where the latest DATA packet arrives from. Therefore, a CMT receiver may send ACKs packets to any one of the (return) paths. In this dissertation, we surveyed historical developments of the TCP-friendliness concept and argued that the original TCP-friendliness doctrine should be extended to incorporate multihoming and SCTP-based CMT. Since CMT is based on (single-homed) SCTP, as a first step, we investigated TCP-friendliness of single-homed SCTP. We discovered that although SCTP's congestion control mechanisms were intended to be "similar" to TCP's, being a newer protocol, SCTP specification has some of the proposed TCP enhancements already incorporated which results in SCTP performing better than TCP. Therefore, SCTP can obtain larger share of the bandwidth when competing with a TCP flavor that does not have similar enhancements. We concluded that SCTP is TCP-friendly but achieves higher throughput than TCP, due to SCTP's better loss recovery mechanisms just as TCPSACK or TCP-Reno performs better than TCP-Tahoe. Then, we designed an experimental framework to investigate the TCP-friendliness of CMT according to the traditional doctrine of TCP-friendliness. Via QualNet simulations, we measured the sending rate of one two-homed CMT flow (containing two CMT subflows) and two SCTP flows and the impact of CMT and two SCTP flows on the other TCP flows in the network while sharing a tight link. We found out that one two-homed CMT association has similar or worse performance (for smaller number of competing TCP flows) than the aggregated performance of two independent, single-homed SCTP associations while sharing the link with other TCP connections, for the reason that a CMT flow creates a burstier data traffic than independent SCTP flows. When compared to the aggregated performance of two-independent TCP connections, one two-homed CMT obtains higher share of the tight link bandwidth because of better loss recovery mechanisms in CMT (as CMT inherits all the built-in TCP enhancements in SCTP). (Abstract shortened by UMI.)....
Sctp A Next Generation Transport Protocol
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Author by : Irene Rüngeler
Languange Used : en
Release Date : 2010
Publisher by : Sudwestdeutscher Verlag Fur Hochschulschriften AG
ISBN : 3838115171
The Stream Control Transmission Protocol (SCTP), originally designed for the transport of signaling messages over IP based telephony signaling networks, is a next generation transport protocol with features suitable for a variety of applications that can benefit from multihoming, multiple streams, or one of SCTP's numerous extensions. To date, SCTP has found its way into all kernel implementations of UNIX derivatives and a Windows prototype. In this book, first, a suite of tools consisting of an SCTP simulation and testing environment is provided. Starting from comparing and analyzing kernel implementations, several aspects of the protocol that lead to undesirable behavior are examined. Congestion and flow control that are adopted from the Transmission Control Protocol (TCP), although using the same mechanisms, need a special treatment. The analysis of the SCTP specific characteristics with the help of the simulation will finally result in solutions that lead to a better performance. The deployment of SCTP will be another concern that can be improved by introducing a specific Network Address Translation (NAT) for SCTP....
Distributed Computing Iwdc 2003
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Author by : Samir R. Das
Languange Used : en
Release Date : 2004-01-23
Publisher by : Springer
ISBN : 9783540246046
This book constitutes the refereed proceedings of the 5th International Workshop on Distributed Computing, IWDC 2003, held in Kolkata, India in December 2003. The 32 revised full papers presented together with five invited papers were carefully reviewed and selected from a total of 105 submissions. The papers are organized in topical sections on distributed algorithms, internetworking and web, parallel and distributed systems, wireless and mobile networking, ad-hoc and sensor networks, learning and optimization, and optical networking...
Stream Control Transmission Protocol Sctp
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Author by : François Buntschu
Languange Used : fr
Release Date : 2003
Publisher by :
ISBN : OCLC:633157198
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