Journal ArticleDOI
Transport protocols for Internet-compatible satellite networks
Thomas Henderson,Randy H. Katz +1 more
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
Journal ArticleDOI
An architecture for Internet service via broadband satellite networks
TL;DR: This work presents an architecture that overcomes problems and allows easy integration of heterogeneous networks into the larger Internet and some results from the initial implementation are presented, which uses TCP connection splitting to improve TCP performance over satellite links.
Transmission Power Control for Enhancing the Performance of Wireless Packet Data Networks
TL;DR: This work proposes power control multiple access (PCMA) a wireless MAC protocol within the collision avoidance framework that generalizes the transmit-ordefer “on/off” collision avoidance model of current protocols to a more flexible “variable bounded power’ collision suppression model.
Journal ArticleDOI
Enhancing wireless internet performance
Fei Hu,Neeraj K. Sharma +1 more
TL;DR: This article surveys wireless Internet technologies whose goals are to enhance networking performance, organized into seven categories: power saving, mobile performance, Multimedia Quality-of-Service, application performance, transport-layer characteristics, data-link layer, and non-TCP options.
Journal ArticleDOI
Performance of DTN protocols in space communications
TL;DR: An experimental performance evaluation of DTN CLA protocols for reliable data transport over a space communication infrastructure involving asymmetric channel rates, with particular attention to the recently developed Licklider transmission protocol (LTP) CLA (i.e., LTPCL).
Proceedings ArticleDOI
A 3: application-aware acceleration for wireless data networks
TL;DR: This paper argues that the behavior of applications can and do dominate the actual performance experienced and motivates an application-aware, but application transparent, solution suite called A 3 (application-aware acceleration) that uses a set of design principles realized in an application specific fashion to overcome the typical behavioral problems of applications.
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.