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Reducing Internet Latency: A Survey of Techniques and Their Merits
BT, Ipswich IP5 3RE, Suffolk, England.
Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), Institutionen för matematik och datavetenskap (from 2013).ORCID-id: 0000-0001-7311-9334
Simula Res Lab AS, N-1364 Fornebu, Norway..
Univ Oslo, N-0316 Oslo, Norway..
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2016 (Engelska)Ingår i: IEEE Communications Surveys and Tutorials, ISSN 1553-877X, E-ISSN 1553-877X, Vol. 18, nr 3, s. 2149-2196Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Latency is increasingly becoming a performance bottleneck for Internet Protocol (IP) networks, but historically, networks have been designed with aims of maximizing throughput and utilization. This paper offers a broad survey of techniques aimed at tackling latency in the literature up to August 2014, as well as their merits. A goal of this work is to be able to quantify and compare the merits of the different Internet latency reducing techniques, contrasting their gains in delay reduction versus the pain required to implement and deploy them. We found that classifying techniques according to the sources of delay they alleviate provided the best insight into the following issues: 1) The structural arrangement of a network, such as placement of servers and suboptimal routes, can contribute significantly to latency; 2) each interaction between communicating endpoints adds a Round Trip Time (RTT) to latency, particularly significant for short flows; 3) in addition to base propagation delay, several sources of delay accumulate along transmission paths, today intermittently dominated by queuing delays; 4) it takes time to sense and use available capacity, with overuse inflicting latency on other flows sharing the capacity; and 5) within end systems, delay sources include operating system buffering, head-of-line blocking, and hardware interaction. No single source of delay dominates in all cases, and many of these sources are spasmodic and highly variable. Solutions addressing these sources often both reduce the overall latency and make it more predictable.

Ort, förlag, år, upplaga, sidor
IEEE, 2016. Vol. 18, nr 3, s. 2149-2196
Nyckelord [en]
Data communication, networks, Internet, performance, protocols, algorithms, standards, cross-layer, comparative evaluation, taxonomy, congestion control, latency, queuing delay, bufferbloat
Nationell ämneskategori
Data- och informationsvetenskap
Forskningsämne
Datavetenskap
Identifikatorer
URN: urn:nbn:se:kau:diva-47472DOI: 10.1109/COMST.2014.2375213ISI: 000384887100024OAI: oai:DiVA.org:kau-47472DiVA, id: diva2:1052968
Tillgänglig från: 2016-12-07 Skapad: 2016-12-07 Senast uppdaterad: 2019-12-09Bibliografiskt granskad

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