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Nichols K.,Pollere, Inc. | Jacobson V.,PARC
Communications of the ACM | Year: 2012

The article aims to provide part of the buffer bloat solution, proposing an innovative approach to AQM suitable for today's Internet called CoDel. Packet networks require buffers to absorb short-term arrival rate fluctuations. Although essential to the operation of packet networks, buffers tend to fill up and remain full at congested links, contributing to excessive traffic delay and losing the ability to perform their intended function of absorbing bursts. The Internet has been saved from disaster by a constant increase in link rates and by usage patterns. Over the past decade, evidence has accumulated that this whistling in the dark cannot continue without severely impacting Internet usage. Developing effective active queue management has been hampered by misconceptions about the cause and meaning of queues. Network buffers exist to absorb the packet bursts that occur naturally in statistically multiplexed networks. Source

Gettys J.,Alcatel - Lucent | Nichols K.,Pollere, Inc.
Communications of the ACM | Year: 2012

Networks without effective AQM may again be vulnerable to congestion collapse. Source

Pentikousis K.,Huawei | Chemouil P.,Orange S.A. | Nichols K.,Pollere, Inc. | Pavlou G.,University College London | Massey D.,Colorado State University
IEEE Communications Magazine | Year: 2012

Information-centric networking (ICN) is a relatively new research area that is motivated by significant changes witnessed in the industry regarding applications and services, as well as customer practice and expectations. Indeed, the vast majority of network traffic today (both Internet and intranet) consists of content dissemination, information that is addressed to more than one recipient. This includes not only content created explicitly for public dissemination (e.g., by large organizations such as news agencies, movie studios, and meteorological offices), but also content dissemination between restricted groups of recipients and, increasingly, content generated by end users. © 2012 IEEE. Source

Pentikousis K.,Huawei | Chemouil P.,Orange S.A. | Nichols K.,Pollere, Inc. | Pavlou G.,University College London
IEEE Communications Magazine | Year: 2012

We argued boldly in the first part of the feature topic on information-centric networking (ICN) [1] that ICN marks a fundamental shift in communications and networking. Indeed, we claim that the paradigm change ICN fosters is poised to have a large impact on the way we think about telecommunications in general, the way we design network architectures in particular, the trade-offs we consider in the specification of (future) protocols, and the possibilities for new services, especially in mobile and wireless environments. For example, in the first part of this feature topic we saw how content-centric networking (CCN) can be used to build social networking applications [2, 3] at a fraction of the complexity of today's systems. © 2012 IEEE. Source

Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 900.40K | Year: 2014

Networked applications work very badly when delay variation (queuing delay) gets large but evidence shows that current queuing delays are barely tolerable and rapidly increasing. There are a plethora of commercial, home-rolled, open source, and university created tools, but none are capable of measuring and monitoring delay variation in real-time or isolating its root cause, thus this projects aim is to fill that gap with no or minimal impact (additional traffic) to the network. The goal of the proposed work is distributed network monitoring to identify delay bottlenecks, process the data to compactly represent its real-time variation, then securely exchange the results in a way that allows all the involved parties to collaboratively locate the delays root cause while not compromising their privacy or security. Making the secure, privacy-preserving dissemination of the new delay information part of the solution allows it to be easily incorporated into existing network management products. The project plan includes working with established small businesses in the network management area to integrate delay-based diagnostic information and working with linux developers to integrate the measurement points into the kernel. A method and proof-of-concept software implementation were developed for a Transport Segment Delay Estimator (TSDE). The TSDE infers path delay behavior based on a novel extraction of information collected at a single point. Using simulated scenarios, the method was successfully validated and output data was compressed by three orders of magnitude. A prototype of the TSDE will be implemented in a commodity network device and tested. A packet loss detection feature for the TSDE will be evaluated. A secure, distributed measurement architecture to include TSDE results in a Network Management Aggregator will be developed, using standards-based approaches where possible. Commercial Applications and OtherBenefits: The TSDE can be deployed in home or ISP routers. The data can be used by network managers to detect and isolate bufferbloat, a drag on productivity and a barrier to energy-saving programs like telecommuting and telepresence. TSDE data can pinpoint most critically affected parts of infrastructure. The techniques can be used in the the DoE networks and between networks to share data.

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