Airmagnet, Inc.

Fluke Corporation

Craig Odell

Daniel Prescott

Douglas M Roberts

Dan Prescott

Daniel Draper

Sean O'Brien

Shawn McManus

Jason Liptak

Nathan Archer

The techniques disclosed herein determine a location independent network delay via a network monitoring device. Such techniques particularly include determining various delays such as a zero window delay, an advertised window delay, and a congestion window delay (including slow start delays).

Methods and apparatus to determine network delay with location independence

The techniques disclosed herein determine a location independent network delay, via a network monitoring device. Such techniques particularly include determining various delays caused by retransmission in instances of lost data segments and application response time.

Methods and apparatus to determine network delay with location independence from retransmission delay and application response time

Disclosed are techniques for accurately determining network latency. The techniques include steps for transmitting a latency packet between a network test device and a remote network node. The techniques particularly include steps for recording timestamps upon transmission and receipt of the latency packet by the respective network device and the remote network node. Network latency is determined based on a difference between timestamps of the network device (transmitting and receiving the latency packet) and a difference between the timestamps of the remote network node (transmitting and receiving the latency packet).

Determining network latency with limited computing resources

An apparatus having improved line rate communication. A Media Access Controller (MAC) accesses each reference pointer stored in transmission slots of a first sub-queue of a transmission queue. Notably, each reference pointer is indexed to a shared memory frame. The MAC transmits data from the shared memory frame in response to accessing the reference pointer, and triggers at least one interrupt when each reference pointer of the first sub-queue is accessed at least once. A processor and/or the MAC can mark in response to the at least one interrupt, each transmission slot of the first sub-queue as ready for transmission.

Method and apparatus having improved line rate IP packet communication

A network round trip time measurement apparatus and method employ an allocated storage in the form of a double ended queue, to store data received while awaiting a corresponding receipt of data to allow the network round trip time to be determined. When the allocated size of the storage is exceeded, storage stops until such time as data is received to allow network round trip time to be determined on at least some of the already stored data, whereupon storage can resume. This allows use in high and low volume traffic situations to automatically scale back the amount of data processed, so as to not overtax available resources.

Method and apparatus to dynamically sample NRT using a double-ended queue that allows for seamless transition from full NRT analysis to sampled NRT analysis

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Colorado Springs, CO, United States of America

Craig Odell