A Simulation Study of Scalable TCP and HighSpeed TCP in Geostationary Satellite Networks

Abstract

This paper investigates the performance of two TCP enhancements (i.e., Scalable TCP and HighSpeed TCP), recently proposed for high-speed backbone networks with a very large bandwidth-delay product, in a geostationary satellite environment. Both persistent and elastic traffic patterns are considered, performance being evaluated in terms of TCP throughput and mean session delay, respectively. The impact of channel characteristics (packet error rate, correlation between successive losses) is widely discussed. Fairness issues are also accounted for, together with the impact of some system parameters, such as the satellite link bandwidth. Extensive comparisons are carried out among Scalable TCP, HighSpeed TCP and other congestion control schemes. The obtained results show the soundness for the use of such protocols in geostationary satellite networks. Indeed, both protocols permit to improve the performance of TCP connections in a wide range of channel conditions, showing (especially Scalable TCP) to be able to cope well with rainy conditions and to exploit a future increase in the satellite link capacity

Cross-layer optimization of TCP throughput for DVB-S2 links

“…We observe that the higher the spectral efficiency the stronger are PER requirements. With such PER TCP values on the order of 10 −4 there is no significant goodput difference between S-TCP and NewReno, because, according to [11], differences (in favor of S-TCP) can be obtained for PER TCP ≥ 10 −3 . We believe that S-TCP can represent a good choice especially in dynamic channel conditions (e.g.…”

“…In particular, our new method implies to redefine the QEF thresholds of ACM according to the following implicit cross-layer design technique: the ModCod selection is performed in order to maximize the TCP goodput [10] rather than guaranteeing PER < 10 −7 . We propose the optimization based on S-TCP, since it has been proven as an efficient solution for error-prone and high delay-bandwidth-product satellite networks [11].…”

Pervasive Internet Access by Vehicles through Satellite Receive-Only Terminals

“…Most of the researches in this area are related to performance-studies or enhancements of Internet protocols over symmetric/asymmetric satellite channels with stationary nodes [11,12,17,18]. There are also quite a few researches dealing with the mobile nodes but most of these study Internet protocol performance/enhancements [8,9].…”