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HIgh PERformance COMmunications
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The Hipercom Team
Hipercom@LIX is a team of researchers, based at Ecole Polytechnique, France, undertaking research in computer networks and telecommunications. Our research interests include sensor networks, wireless networks and ad hoc networking in general. The team comprises about 10 people, including staff researchers and students.
For details of the activities within Hipercom @LIX, as well as information on our team members, please explore the menu on the left. |
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RFC6130: Mobile Ad Hoc Network (MANET) Neighborhood Discovery Protocol (NHDP)
By T. Clausen, C. Dearlove, J. Dean.
Published in IETF - Std. Track RFC 6130 on 2011-03-28.
+ Download File
+ http://tools.ietf.org/html/rfc6130
+ Abstract
Abstract: This document describes a 1-hop and symmetric 2-hop neighborhood discovery protocol (NHDP) for mobile ad hoc networks (MANETs).
This is part of the Hipercom@LIX efforts towards OLSRv2 Standardization Category: Standard - IETF |
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RFC6206: The Trickle Algorithm
By P. Levis, T. Clausen, J. Hui, O. Gnawli, J. Ko.
Published in IETF - Std. Track RFC 6206 on 2011-03-27.
+ Download File
+ http://tools.ietf.org/html/rfc6206
+ Abstract
Abstract: The Trickle algorithm allows nodes in a lossy shared medium (e.g., low-power and lossy networks) to exchange information in a highly robust, energy efficient, simple, and scalable manner. Dynamically adjusting transmission windows allows Trickle to spread new information on the scale of link-layer transmission times while sending only a few messages per hour when information does not change. A simple suppression mechanism and transmission point selection allow Trickle's communication rate to scale logarithmically with density. This document describes the Trickle algorithm and considerations in its use.
muOLSR for Sensor Connectivity Category: Standard - IETF |
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RFC5497: Representing Multi-Value Time in MANETs
By T. Clausen, C. Dearlove.
Published in IETF - Std. Track RFC on 2009-03-13.
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+ http://www.rfc-editor.org/rfc/rfc5497...
+ Abstract
Abstract: This document describes a general and flexible TLV (type-length-value structure) for representing time-values, such as an interval or a duration, using the generalized Mobile Ad hoc NETwork (MANET) packet/message format. It defines two Message TLVs and two Address Block TLVs for representing validity and interval times for MANET routing protocols.
Category: Standard - IETF
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RFC5444 - Generalized Mobile Ad Hoc Network (MANET) Packet/Message Format
By T. Clausen, C. Dearlove, J. Dean, C. Adjih.
Published in IETF - Std. Track RFC on 2009-02-05.
+ Download File
+ http://www.ietf.org/rfc/rfc5444.txt
+ Abstract
Abstract: This document specifies a packet format capable of carrying multiple messages that may be used by mobile ad hoc network routing protocols.
Category: Standard - IETF
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RFC5148: Jitter Considerations in Mobile Ad Hoc Networks (MANETs)
By T. Clausen, C. Dearlove, B. Adamson.
Published in RFC on 2008-02-27.
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+ http://www.rfc-editor.org/rfc/rfc5148...
+ Abstract
Abstract: This document provides recommendations for jittering (randomly modifying timing) of control traffic transmissions in Mobile Ad hoc NETwork (MANET) routing protocols to reduce the probability of transmission collisions. This memo provides information for the Internet community.
Category: Standard - IETF
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RFC3626: The Optimized Link State Routing Protocol
By T. Clausen, P. Jacquet.
Published in The Internet Engineering Task Force (IETF) - MANET Working Group on 2003-10-01.
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+ http://www.ietf.org/html.charters/man...
+ Abstract
Abstract: This document describes the Optimized Link State Routing (OLSR) protocol for mobile ad hoc networks. The protocol is an optimization of the classical link state algorithm tailored to the requirements of a mobile wireless LAN. The key concept used in the protocol is that of multipoint relays (MPRs). MPRs are selected nodes which forward broadcast messages during the flooding process. This technique substantially reduces the message overhead as compared to a classical flooding mechanism, where every node retransmits each message when it receives the first copy of the message. In OLSR, link state information is generated only by nodes elected as MPRs. Thus, a second optimization is achieved by minimizing the number of control messages flooded in the network. As a third optimization, an MPR node may chose to report only links between itself and its MPR selectors. Hence, as contrary to the classic link state algorithm, partial link state information is distributed in the network. This information is then used for route calculation. OLSR provides optimal routes (in terms of number of hops). The protocol is particularly suitable for large and dense networks as the technique of MPRs works well in this context.
Category: Standard - IETF
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The OLSR Success Story
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A routing protocol for Mobile Ad hoc NETworks (MANETs) developed integrally by the Hipercom project team, OLSR has become standardised and widely adopted: Google references OLSR with more than 450,000 hits, DARPA uses it as its reference protocol for its tactical networks, there are many urban deployments of OLSR based MESH WiFi networks, and industrial adoption of OLSR is significant.
Indeed, the OLSR protocol is a rare example of IETF standardisation of a protocol driven from the very beginning (development of algorithms and ideas) to the very end (formal publication of a protocol specification as an RFC - an official document sanctioning the protocol as adopted by the IETF) by a single academic actor - the Hipercom project team.
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Dr. Omprakash Gnawali's talk On the Repeatibility of Wireless Sensor Network Experiments
Abstract: Repeatable experiments are thought to be an essential core of any scientific discipline. In this talk, I will describe the challenges in making sensor networking experiments repeatable. I will then describe the work I and others in the sensor network research community have done to address the repeatibility of network experiments.
Speaker Bio: Omprakash Gnawali is an Assistant Professor at the University of Houston, USA. He was a Postdoctoral Scholar at Stanford University, got his Ph.D. from the University of Southern California, and received his Masters and Bachelors degrees from the Massachusetts Institute of Technology. His research lies at the intersection of low power wireless networks and embedded sensing systems.
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J. Yi at 2012 IEEE International Conference on Wireless Information Technology and Systems
He is presenting paper "Smart Route Request for On-demand Route Discovery in Constrained Environments", joint work with T. Clausen and A. Bas. And, it is in Hawaii!!
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J. A. Cordero at the 31st Annual IEEE International Conference on Computer Communications (INFOCOM 2012) in Orlando, Florida (United States)
He is presenting the paper "Impact of Jitter-based Techniques on Flooding over Wireless Ad hoc Networks: Model and Analysis", joint work with Philippe Jacquet and Emmanuel Baccelli.
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