Since March 99 : CS Telecom / INRIA Sophia Antipolis

· Definition of an IP architecture supporting QoS based on IntServ/RSVP and DiffServ. This new architecture is under implementation and will be integrated in different CS Telecom products.

· Head of the INTRADIFF RNRT project : implementing DiffServ in an Intranet. Partners : Cegetel, Thomson-CSF-Detexis, INRIA.

· Supervisor of three PHD students at INRIA-Sophia (Rodeo/Planete Project). They are involved in: QoS (scheduling : CBQ, WFQ, DRR, ? ; active queue management : RED, TD, PBS), Protocols and new architecture for QoS (RSVP, COPS, MPLS), Fast-forwarding and classification in  IP routers.

 Sept 94 - Feb 99 :  PRISM Laboratory - Versailles University

· Definition of a new mechanism for MPEG video transmission over ATM networks.

· Definition of a new version of the protocol FRP developed by CNET-lannion and a new version of the contract ABT allowing an elastic resource reservation.

· Definition of a rate control mechanism for a MPEG encoder that adapts the compression ratio to the available bandwidth in the network.

· Keeping track of ATM-Forum contributions, ITU recommendations and research publications.

· Teaching activities.

Education

Sept 94 - Jan 98 : PHD at Versailles University supervised by Prof. Guy PUJOLLE. Subject : Dynamic resource allocation for video transmission over ATM networks.

Sept 93 - Jun 94 : DEA MISI, best of graduation, Option Networks, University of Versailles Saint-Quentin, France.

Sept 89 - Juin 93 : Engineering Diploma in Computer Science (Bac+6), Best of Graduation, Computer Sciences Graduate School of Tunisia (ENSI), Tunisia.

Tunisian Presidential Award of the best Engineering Diploma in Computer Science (1993).

Sept 87 - Jun 89 : Preparation for engineering studies, "Institut Préparatoire aux Etudes d'Ingénieur de Nabeul", Tunisia.

Sept 86 - Jun 87 : Baccalaureate in Mathematics and Physics (Bac C), Tunisia.

Main interest

IP

IP, TCP, UDP protocols
Routing protocols Intra/Inter Domain : RIP, OSPF, BGP
Resource allocation/reservation : RSVP, COPS, FRP
IntServ and DiffServ architectures (classification, metering, scheduling, etc)

ATM

ATM architecture.
ATM transfer capabilities : DBR, SBR, ABR, UBR, ABT.
Traffic control, UPC/NPC, GCRA.
Congestion control, CAC, EFCI, EPD.
Statistical multiplexing and QoS.

MPEG Video compression

Compression techniques :motion estimation and compensation, DCT, Quantification, entropy coding.
JPEG, MPEG-1, MPEG-2, MPEG-4, MPEG-7, H.261, H.263
Rate control (TM5, ?), open/closed loop coding
MPEG traffic models

Publications

Slim Gara, Guy Pujolle, " Study of MPEG VBR sequence quality transmitted with rt-VBR and ABT/DT contracts ", IEEE ATM'97 WORKSHOP , Chapman & Hall, May 1997, Lisbon, Portugal .
Slim Gara, Guy Pujolle, " Resource Allocations protocols Impact on MPEG sequence Quality", PMCCN '97, Chapman & Hall, November 1997, Tsukuba, Japan.
Jian Ping Zhang, Slim Gara, " Feasibility of Transferring Compressed Video over ATM Networks with Enhanced ABR Flow Control ", 6th International Conference on Telecommunication Systems, Modeling and Analysis, Mars 1998, Nashville.
Jian Ping Zhang, Slim Gara, " Improvement in Transferring Compressed Video over ATM Networks with Enhanced ABR Flow Control ", IEEE GLOBECOM'98, Australia, November 1998.

Sport activities

Table tennis, Soccer, Volley-ball, swimming.