NDLI: On estimating end-to-end network path properties ( SIGCOMM LA '01 )

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On estimating end-to-end network path properties ( SIGCOMM LA '01 )

Content Provider	ACM Digital Library
Author	Allman, Mark Paxson, Vern
Abstract	The more information about current network conditions available to a transport protocol, the more efficiently it can be use the network to transfer its data. In networks such as the Internet, the transport protocol must often form its own estimates of network properties based on measurements performed by the connection endpoints. We consider two basic transport estimation problems: determination the setting of the retransmission timer (RTO) for a reliable protocol, and estimating the bandwidth available to a connection as it begins. We look at both of these problems in the context of TCP, using a large TCP measurement set [Pax97b] for trace-driven simulations. For RTO estimation, we evaluate a number of different algorithms, finding that the performance of the estimators is dominated by their minimum values, and to a lesser extent, the timer granularity, while being virtually unaffected by how often round-trip time measurements are made or the settings of the parameters in the exponentially-weighted moving average estimators commonly used. For bandwidth estimation, we explore techniques previously sketched in the literature [Hoe96, AD98] and find that in practice they perform less well than anticipated. We then develop a receiver-side algorithm that performs significantly better.
Starting Page	124
Ending Page	151
Page Count	28
ISBN	1581133545
DOI	10.1145/371626.371774
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2001-04-03
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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