AuthorsM. Rajiullah, P. Hurtig, A. Brunström, A. Petlund and M. Welzl
TitleAn Evaluation of Tail Loss Recovery Mechanisms for TCP
AfilliationMedia, Communication Systems
Publication TypeJournal Article
Year of Publication2015
JournalSIGCOMM Comput. Commun. Rev.
Place PublishedNew York, NY, USA
Other NumbersISSN: 0146-4833
Keywordscongestion control, latency, packet loss, recovery, tcp

Interactive applications do not require more bandwidth to go faster. Instead, they require less latency. Unfortunately, the current design of transport protocols such as TCP limits possible latency reductions. In this paper we evaluate and compare different loss recovery enhancements to fight tail loss latency. The two recently proposed mechanisms "RTO Restart" (RTOR) and "Tail Loss Probe" (TLP) as well as a new mechanism that applies the logic of RTOR to the TLP timer management (TLPR) are considered. The results show that the relative performance of RTOR and TLP when tail loss occurs is scenario dependent, but with TLP having potentially larger gains. The TLPR mechanism reaps the benefits of both approaches and in most scenarios it shows the best performance.