Journal ArticleDOI
Transport protocols for Internet-compatible satellite networks
Thomas Henderson,Randy H. Katz +1 more
Reads0
Chats0
TLDR
This work addresses the question of how well end-to-end transport connections perform in a satellite environment composed of one or more satellites in geostationary orbit (GEO) or low-altitude Earth orbit (LEO), in which the connection may traverse a portion of the wired Internet.Abstract:
We address the question of how well end-to-end transport connections perform in a satellite environment composed of one or more satellites in geostationary orbit (GEO) or low-altitude Earth orbit (LEO), in which the connection may traverse a portion of the wired Internet. We first summarize the various ways in which latency and asymmetry can impair the performance of the Internet's transmission control protocol (TCP), and discuss extensions to standard TCP that alleviate some of these performance problems. Through analysis, simulation, and experiments, we quantify the performance of state-of-the-art TCP implementations in a satellite environment. A key part of the experimental method is the use of traffic models empirically derived from Internet traffic traces. We identify those TCP implementations that can be expected to perform reasonably well, and those that can suffer serious performance degradation. An important result is that, even with the best satellite-optimized TCP implementations, moderate levels of congestion in the wide-area Internet can seriously degrade performance for satellite connections. For scenarios in which TCP performance is poor, we investigate the potential improvement of using a satellite gateway, proxy, or Web cache to "split" transport connections in a manner transparent to end users. Finally, we describe a new transport protocol for use internally within a satellite network or as part of a split connection. This protocol, which we call the satellite transport protocol (STP), is optimized for challenging network impairments such as high latency, asymmetry, and high error rates. Among its chief benefits are up to an order of magnitude reduction in the bandwidth used in the reverse path, as compared to standard TCP, when conducting large file transfers. This is a particularly important attribute for the kind of asymmetric connectivity likely to dominate satellite-based Internet access.read more
Citations
More filters
Dissertation
Évaluation des performances des réseaux sans-fil mobiles
TL;DR: In this article, the impact of the mobilite on the performance of TCP in ad hoc networks is investigated, and it is shown that le debit des nœuds relais (debit et taille moyenne des files) minimise quand les noeuds bougent selon des modeles de mouvements aleatoires.
Dissertation
Application acceleration for wireless and mobile data networks
TL;DR: This work proposes Wireless Memory (WM), a two-ended AP-client solution to effectively exploit traffic redundancy in wireless and mobile environments and designs and develops real-world solutions that manifest the principles and algorithms to lend a strong systems-oriented focus to the solutions and to serve as credible evaluation platforms.
Patent
Communication terminal, comunication control method, and communication control program
TL;DR: In this article, the number of bytes of segments which arrive at a receiving side within a period of a minimum value of RTT measured by a minimum time measurement section 13, and a target calculation section 15 calculates a target used for controlling segment transmission based on the number bytes of the received segments calculated by the received byte calculation section 14.
Journal ArticleDOI
Novel evaluation method of TCP performance over satellite links
Wang Li-na,Gu Xuemai +1 more
TL;DR: In this paper, a TCP module is divided into three functional blocks, namely data processing, congestion control and error control, and a re-established TCP module can be easy to update TCP congestion control strategy or error control strategy.
References
More filters
Journal ArticleDOI
Random early detection gateways for congestion avoidance
Sally Floyd,Van Jacobson +1 more
TL;DR: Red gateways are designed to accompany a transport-layer congestion control protocol such as TCP and have no bias against bursty traffic and avoids the global synchronization of many connections decreasing their window at the same time.
Journal ArticleDOI
Congestion avoidance and control
TL;DR: The measurements and the reports of beta testers suggest that the final product is fairly good at dealing with congested conditions on the Internet, and an algorithm recently developed by Phil Karn of Bell Communications Research is described in a soon-to-be-published RFC.
Proceedings Article
Hypertext Transfer Protocol -- HTTP/1.1
Roy T. Fielding,James Gettys,Jeffrey C. Mogul,H. Frystyk,Larry Masinter,Paul J. Leach,Tim Berners-Lee +6 more
TL;DR: The Hypertext Transfer Protocol is an application-level protocol for distributed, collaborative, hypermedia information systems, which can be used for many tasks beyond its use for hypertext through extension of its request methods, error codes and headers.
Journal ArticleDOI
Fair end-to-end window-based congestion control
Jeonghoon Mo,Jean Walrand +1 more
TL;DR: The existence of fair end-to-end window-based congestion control protocols for packet-switched networks with first come-first served routers is demonstrated using a Lyapunov function.