By Bednorz W.

ISBN-10: 9537619273

ISBN-13: 9789537619275

Bednorz W. Advances in grasping algorithms (In-Teh, 2008)(ISBN 9537619273)(596s)_CsAl_

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2). A Greedy Scheme for Designing Delay Monitoring Systems of IP Networks 35 Unlike the link monitoring case, we cannot claim that the optimal solution for path monitoring must contain at least one probe for every routing path5, which makes the problem for paths more dificult to approximate. 2 will achieves good results. Yet, finding an algorithm with a low approximation ratio is still an open problem. 7. Experimental results In this section, we present experimental results for the number of monitoring stations and probe messages required to measure the latency of every link in the network.

A better estimate can be achieved by partitioning each path into a few contiguous segments. Each segment is then required to be in the RT of a single monitoring station, which estimates its delay by sending two probe messages to the segment's end-points. Of course, the best estimate of delay is obtained when every path consists of a single segment. 1 cannot guarantee an upper bound on the number of segments in a path. In fact, this number may be as high as the number of links in the path, even when the number of monitoring stations is small, as illustrated by the following example.

Org/. [5] V. Jacobsen. “Pathchar - A Tool to Infer Characteristics of Internet Paths”, April 1997. gov/pathchar. [6] P. html. [7] R. L. Carter and M. E. Crovella. “Server Selection Using Dynamic Path Characterization in Wide-Area Networks”, In Proceedings of IEEE INFOCOM'99, Kobe, Japan, April 1997. [8] K. Lai and M. Baker. “Measuring Bandwidth”. In Proceedings of IEEE INFOCOM’99, New York City, New York, March 1999. [9] C. Dovrolis, P. Ramanathan and D. Moore. ”. In Proceedings of IEEE INFOCOM’2001, Anchorage, Alaska, April 2001.

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Advances in greedy algorithms by Bednorz W.


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