Lucent Technologies Inc.

Alcatel-lucent USA Inc.

William S Cleveland

Don X Sun

Jin Cao

Francis Xavier Zane, Jr

Fei Chen

A method is provided for determining a bandwidth allocation needed to provide a specified QOS requirement that takes appropriate account of statistical variations for packet streams in a transmission link. In particular, a statistical model of the packet stream is formed using fractional sum difference statistical models and the model is evaluated in respect to synthetically generated traffic streams. The bandwidth allocation approach is specified in terms of the bandwidth, &#x3b2;, required for a traffic load, &#x3c4;, subject to the requirements of a maximum queuing delay, &#x3b4;, and a packet loss limitation parameter, &#x3c9;. Accordingly, that bandwidth allocation approach is implemented as a statistical model for &#x3b2; as a function of &#x3c4;, &#x3b4; and &#x3c9;.

Method and apparatus for allocating link bandwidth as function of QOS requirement

A monitoring technique is provided for diagnosing delays in file transfers between a server and a client via a network, which monitoring technique operates to make measurements of ordinary network traffic on a link unique to a given client/server pair connection. In particular, the invention operates to apply a set of rules to partition the file transfer time into increments attributable to specific identified causes. To that end, the invention intercepts and sorts traffic traversing a predetermined monitor point into a set of flows, wherein each flow consists of all of the traffic between one client and one server. For each flow the packet headers and timestamps of all packets passing in each direction are read. The partitioning of the file transfer times is based on the resulting data.

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Summit, NJ, United States of America

William S Cleveland