Emmanuel Lochin received his Ph.D from the LIP6 laboratory of Pierre and Marie Curie University - Paris VI in December 2004 and the Habilitation Thesis (Habilitation à Diriger des Recherches) in October 2011 from Institut National Polytechnique de Toulouse (INPT) (Thesis, Slides). From July 2005 to August 2007, he held a researcher position in the Networks and Pervasive Computing research program at National ICT Australia, Sydney. He joined ISAE / LAAS-CNRS in September 2007 as researcher and network security officer. He is also member of TéSA laboratory.

His research interests include DTN, New Transport Protocols, Reliability, Congestion Control.

Program Committee Membership :

• TPC member IEEE ISCIT 2012
• TPC member IEEE WCNC 2012
• TPC member IEEE iThings 2012
• TPC member Symposium on Wireless Technology & Applications (IEEE Malaysia)
• TPC member Conference on Computer Applications and Industrial Electronics (IEEE Malaysia)
• TPC member Symposium on Computers & Informatics 2012 (IEEE Malaysia)

 Last news

• 20/04/12 NEW ! An IP-ERN architecture to enable hybrid E2E/ERN protocol and application to satellite networking, Dino Martin Lopez Pacheco, Tuan Tran Thai, Emmanuel Lochin, Fabrice Arnal, to appear in Elsevier Computer Networks
• 14/04/12 NEW ! A DTN routing scheme for quasi-deterministic networks with application to LEO satellites topology, Rémi Diana, Emmanuel Lochin, Laurent Franck, Cédric Baudouin, Emmanuel Dubois, Patrick Gélard, accepted for publication at IEEE VTC Fall 2012
• 11/04/12 NEW ! Modelling the Delay Distribution of Binary Spray and Wait Routing Protocol, Rémi Diana, Emmanuel Lochin, accepted for publication at the Sixth IEEE WoWMoM Workshop on Autonomic and Opportunistic Communications (IEEE AOC)
• 08/04/12 NEW ! On the Limit of Fountain MDC Codes for Video Peer-To-Peer Networks, Guillaume Smith, Pierre-Ugo Tounoux, Roksana Boreli, Jerome Lacan, Emmanuel Lochin, accepted for publication at the First IEEE WoWMoM Workshop on Video Everywhere
• 01/03/12 NEW ! Online multipath convolutional coding for real-time transmission, Tuan Tran Thai, Emmanuel Lochin, Jérôme Lacan, accepted for publication in Packet Video 2012
• 14/02/12 NEW ! On the Quality of VoIP with DCCP for Satellite Communications, Golam Sarwar, Roksana Boreli, Emmanuel Lochin, accepted for publication in the International Journal of Satellite Communications and Networking
• 09/01/12 NEW ! Memory and Complexity Analysis of On-the-Fly Coding Schemes for Multimedia Multicast Communications, G.Smith and E. Lochin and J. Lacan and R. Boreli, to appear at IEEE ICC 2012

 Research

I am mostly involved in the DTN area and in particular, I study congestion, the use Network Coding for IP networks and reliable mechanisms for long delay and satellite links.

See my publications for further details.

An architecture to support explicit rate signaling over End-to-End paths

This project proposes an architecture, called IP-ERN, which allows Explicit Rate Notification (ERN) protocols to be inter-operable with current IP-based networks. IP-ERN is based on the execution of both End-to-End (E2E) and ERN protocols at the end hosts. The resulting E2E-ERN protocol provides inter and intra protocol fairness and benefits from all ERN advantages when possible. We detail the principle of this novel architecture, which is compliant with every TCP feature, as well as IP-in-IP tunneling solutions. In particular, IP-ERN is an alternative to splitting Performance Enhancement Proxies.

• An architecture to support explicit rate signaling over End-to-End paths
• SatERN : a PEP-less solution for satellite communications
• Towards an incremental deployment of ERN protocols : a proposal for an E2E-ERN hybrid protocol

TETRYS : reThinking rEliabiliTy foR long-delaY networkS

TETRYS enables a new reliability algorithm specifically useful when retransmission is either problematic or not possible. In case of multimedia or multicast communications and in the context of the Delay Tolerant Networking (DTN), the classical retransmission schemes can be counterproductive in terms of data transfer performance or not possible when the acknowledgment path is not always available. Indeed, over long delay links, packets retransmission has a meaning of cost and must be minimized. The purpose of Tetrys is to propose a novel reliability mechanism with an implicit acknowledgment strategy that could be used either within these new DTN proposals, for multimedia traffic or in the context of multicast transport protocols. This proposal is based on a new on-the-fly erasure coding concept specifically designed to operate efficient reliable transfer over bi-directional links. Tetrys allows to unify a full reliability with an error correction scheme. Tetrys is not sensitive to the loss of acknowledgments while ensuring a faster data availability to the application compared to other traditional acknowledgment schemes. See these papers for details :

• On-the-Fly Coding for Time-Constrained Applications- In IEEE Transactions on Multimedia
• On-the-Fly Coding for Real-Time Applications - In Proc. of ACM Multimedia 2009
• Rethinking Reliability for Long-Delay Networks - In Proc. of IWSSC 2008

Check our Tetrys demos Bernouilli channel and Gilbert Elliott channel.

Multipath Networking at Transport Layer

Conjointly with NICTA, we are exploring multipath transport protocols capabilities and in particular, we investigate possible enhancements in the CMT-SCTP protocol. This work is a part of the thesis of Golam Sarwar and a presentation of the expected thesis work is given in these slides.

New transport protocols for DTN and satellites

This work aims at studying DCCP/CCID3 and DCCP/CCID4 enhancements to efficiently carry out multimedia streaming and VoIP over long-delay links. This work is done in collaboration with NICTA. Together we are proposing new algorithms in order to fit media characteristics with application requirements. In a last work, we have proposed a solution to mitigate the performance degradation and corresponding Quality of Experience (QoE) reduction caused by packet reordering for multimedia applications which utilise unreliable transport protocols like the Datagram Congestion Control Protocol (DCCP). We have proposed a dynamically adjustable buffer in the transport protocol receiver which uses this optimum buffer size and demonstrated that our solution reduces the packet loss rate, increases the perceived bandwidth and does not increase jitter in the received applications packets while still being within the application’s delay limits, therefore resulting in an increased QoE of multimedia applications.

See our paper Mitigating the Impact of Packet Reordering to Maximize Performance of Multimedia Applications.

Projects and softwares

For other projects and softwares see check this page.

Some videos linked to my research activity

 Linkages

Université Pierre et Marie Curie, Université de la Réunion, Université de Franche-Comté, Université de Nice, Telecom Bretagne, University of New South Wales, NICTA, 7-IP, Thales Alenia Space, CNES

 Honors and Awards

I am, with Guillaume Jourjon and Patrick Sénac, the recipient of the best paper award of the Multimedia Communications & Home Services Symposium of IEEE International Conference on Communications (IEEE ICC 2007) Glasgow, UK - 24-27 June, 2007

Mention spéciale du jury CFIP2009 à Pierre Ugo Tournoux, CNRS-LAAS et Université de Toulouse pour son article avec Amine Bouabdallah, Emmanuel Lochin et Jérôme Lacan. Tetrys : Un mécanisme de fiabilisation polyvalent

 Teaching

1A
 1MTP2 : Computer Science Basis (concepts informatiques de base)
 1SYS1 et 2SYS6 : Java System Programming (programmation des systèmes en Java)

2A
 4-1MIN12 : Introduction to Python programming

3A - 5-5MMI51 module manager
 5-5MMI51 : Advanced Network Architectures (architectures de réseaux avancés)
 5-11MMI111 : Space Networks (réseaux spatiaux)

 PhD and postdoc students

On going

 Golam Sarwar, thèse NICTA, Method for trust establishment in ephemeral networks
 Rémi Diana , thèse co-financée CNES/TéSA, Routing based congestion control for DTN satellite topology - Routage à contrôle de congestion pour les réseaux DTNs
 Guillaume Smith, thèse en co-tutelle NICTA/TéSA, Tetrys for anycast and multihop networks
 Nicolas Kuhn, thèse en co-tutelle NICTA/TéSA, Cross-layer reliability mechanisms
 Victor Alejandro Ramiro Cid, thèse en co-tutelle ISAE/NICTA, DTN monitoring

Alumni

 Pierre-Ugo Tournoux, thèse LAAS, Protocoles de transports basés sur le Network Coding, thèse ISAE soutenue en Décembre 2010, Pierre-Ugo est en post-doc TeSA/NICTA
 Dino Matin Lopez Pacheco (post-doctorat ISAE Septembre 2008 à Aout 2009) est maintenant maître de conférences à l’université de Nice depuis Septembre 2009
 Guillaume Jourjon (Towards a Versatile Transport Protocol, thèse de l’université du New South Wales (UNSW) et de l’Université de Toulouse, Janvier 2008). Guillaume est maintenant chercheur à NICTA