SCTP Subflows for Survivable FCS Applications
نویسندگان
چکیده
The Stream Control Transmission Protocol (SCTP), a general-purpose transport layer protocol by the IETF, has been a promising candidate to join UDP and TCP as a core protocol. The new SCTP services such as multi-homing, multi-streaming, message boundary preservation, no head-of-line delivery blocking, and enhanced security features can significantly enhance performance of FCS applications. SCTP congestion control mechanism in networks with path diversity or QoS enhancements to support differentiated services, can jeopardized performance due to the socalled false sharing. We propose to modify the current SCTP such that an association is divided into several subflows based on their Differentiated Services Codepoints (DSCPs). Each sub-flow inside the SCTP association shall have its own congestion control parameters. We derived analytic models for the SCTP with the proposed modification for differentiated services environment with both DropTail and RED queues. Our simulation experiments show that our proposed solution prevents false sharing and achieves a better throughput in a differentiated services network. The simulation experiment results also verify that the analytical models accurately reflect the SCTP behavior.
منابع مشابه
Performance evaluation of subflow capable SCTP
With its new features such as multi-homing, multi-streaming, and enhanced security, the Stream Control Transmission Protocol (SCTP) has become a promising candidate to join UDP and TCP as a general-purpose transport layer protocol. Multiple streams in an SCTP association provide an aggregation mechanism to accommodate heterogeneous objects, which belong to the same application but may require d...
متن کاملThroughput models for SCTP with parallel subflows
Multi-streaming provides SCTP with an aggregation mechanism to accommodate heterogeneous objects, which belong to the same application but may require different type of QoS from the network. However, in the current SCTP specification, supporting QoS inside an SCTP association is not a concern; it is also hindered by the fact that all streams share the flow and congestion control at the associat...
متن کاملImproving File Transfer in Fcs Networks
We compare the performance of two transport protocols, SCTP and the New-Reno variant of TCP, for file transfers in two FCS networking scenarios. We argue why SCTP is better suited for file transfers in a network prone to resource failures. To measure performance, we implemented FTP over SCTP in a FreeBSD environment. Our results indicate for our tested path configurations, (1) using SCTP as the...
متن کاملTransport Layer Multihoming for Fault Tolerance in Fcs Networks
We document a potential flaw in the current SCTP retransmission policy. The current scheme intends to improve the chance of success by exploiting the redundant paths between multihomed endpoints, but we have found that the current SCTP retransmission policy often degrades performance. We comparatively evaluate an alternative retransmission policy and show that the current SCTP retransmission po...
متن کاملFile Transfer in Fcs Networks Using Transport Layer Multistreaming*
We identify overheads associated with the current FTP protocol, which uses TCP for transport. We discuss why using TCP to avoid such overheads puts a burden on the application. Unlike TCP, SCTP allows transport layer multistreaming within a single association. We present two modifications to FTP, which use SCTP multistreaming in a “TCP-friendly” manner. Our modifications avoid the identified ov...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2004