Traffic Statistics

The investigation of network traffic using statistical analysis to gain insight into performance and behaviour.

Conference paper
Proceedings of IEEE/ICC Conference

This paper looks at a mechanism related to Explicit Congestion Notification. It uses a single bit in the IP header to communicate the congestion at each hop in the path. Statistical estimators are used to work out the accuracy of the congestion estimation.

Journal Paper
Journal of Computer and System Sciences, 77(5)

This paper looks at the phenomenon of long-range dependence. It shows that certain long-range dependent models give answers which contain infinities and also that this behaviour will not be detected by a naive modelling approach. The work is an extension of an earlier published PMECT paper.

Paper review
Deep Diving into BitTorrent Locality
Authors: 
Ruben Cuevans -- Univ Carlos III de Madrid, Nikolaos Laoutaris, Xiaoyuan Yang, Georgos Siganos and Pablo Rodriguez
Published: 
INFOCOM

This paper looks at P2P traffic over bittorrent from a large database of torrents. The paper considers the effects of localising bittorrent traffic on performance and ISP cost saving.

Data: The data set is one of the impressive things about this paper. 100K torrents of which 40K active. Demographics from 3.9M concurrent users and 21M total users over a day from 11K ISPs. Speed test results from ookla and iplane.

Paper review
On the predictability of large transfer TCP throughput
Authors: 
Qi He, Constantine Dovrolis and Mostafa Ammar
Published: 
SIGCOMM

This paper looks at ways of predicting the TCP throughput of a connection. The assumption is that some information is available about the connection. A comparison is made between “formula based” (FB) prediction, that is using round-trip time and loss versus time series analysis prediction (referred to here as history based (HB)), that is using previous measurements on the same connection. Both approaches require some measurements from the connection already.

Paper review
Improving content delivery using provider-aided distance information
Authors: 
Ingmar Poese, Benjamin Frank, Bernhard Ager, Georgios Smaragdakis and Anja Feldmann
Published: 
IMC

This paper looks at CDN networks and, in particular, suggests Provider-aided Distance Information System (PaDIS), which is a mechanism to rank client-host pairs based upon information such as RTT, bandwidth or number of hops. Headline figure, 70% of http traffic from a major european ISP can be accessed via multiple different locations. “Hyper giants” are defined as the large content providers such as google, yahoo and CDN providers which effectively build their own network and have content in multiple places.

Paper review
The power of prediction -- Cloud bandwidth and cost reduction
Authors: 
Eyal Zohar, Israel Cidon and Osnat Mokryn
Published: 
SIGCOMM

This paper deals with reducing costs for cloud computing users. Cloud customers use “Traffic Redundancy Elimination” (TRE) to reduce bandwidth costs. Redundant data chunks are detected and removed – cloud providers will not implement middleboxes for this as they have no incentive. The paper gives a TRE solution which does not require a server to maintain client status. The system is known as PACK “Predictive ACKnowledgements” which is receiver driven.

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