Contact information:


+33 2 99 12 70 36

    Xavier Lagrange received the Engineering Degree from Ecole Centrale des Arts et Manufactures, Paris, France, in 1984 and the Ph.D. degree from TELECOM Paristech in 1998. He was the head of the "Networks, Security and Multimedia" Departement of TELECOM Bretagne at Rennes from 2003 till 2009. Xavier Lagrange joined Alcatel Radiotelephone in 1985, then Ecole Nationale Supérieure des Télécommunications (Télécom Paris). Since 2000, he has been professor at IMT Atlantique (formerly known as Telecom Bretagne) at "Network Systems, Cybersecurity and Digital Law" in the Rennes Campus. Xavier Lagrange is the head of research group ADOPNET of IRISA. Xavier Lagrange is the author of several international publications.


    His areas of interest include resource allocation, medium access control and performance analysis for 4th and 5th generation cellular networks, hybrid networks (ad-hoc+cellular, broadcast+cellular) and LPWAN (low-power wide-area network ). He is a senior member of IEEE.

    Current Advised PhD students

    • Cesar Vargas, with Orange on Ue-based relaying for Machine-Type-Devices in 5G networks
    • Malo Manini (direction), with http://b-com.com/fr on Resource allocation and scheduling for 5G networks based Massive Multi-Users MIMO (MU-MIMO)

    Advised PhD students (who defended)

    • EZZAOUIA Mahdi (with C. Gueguen and in "co-tutelle" with Ecole Nationale d’Ingénieurs de Tunis), Allocation de ressource opportuniste dans les réseaux sans fil multicellulaires
    • MAJED Najmeddine, Measuring and Improving the Quality of Experience of Mobile Voice Over IP, 2018
    • DUAN Jialong, Coordination inside Centralized Radio Access Networks with Limited Fronthaul Capacity, 2017
    • SONG Qipeng (supervised by L. Nuaymi), Radio Access Mechanisms for Massive Machine Communication in Long-Range Wireless Networks
    • DIEGO MAZA William David, Contrôle de trafic et gestion de la QoS "IP centric" dans les réseaux mobiles LTE, 2016
    • KHADRAOUI Younes,Vers un réseau d'accès multi-technologie sans coutur, 2016
    • CHEN Yangyang, Mobile Relays for LTE, 2015
    • ANIS Muhammad Moiz, "Cooperative Retransmission of Broadcast Data Flows Via Cellular Networks", 2014
    • ALI AHMAD Hassan, "Design and Analysis of Distributed Mobility Management in IPv6 Mobile Networks", 2014
    • AWANG Azlan, "A cross-layer MAC/routing protocol for wireless sensor networks", 2011
    • IBRAHIM Ali, "Analyse et optimisation des performances des réseaux WLAN multi-cellules", 2009
    • EL HENI Neila, "Multicast transmission over high speed cellular networks", 2009
    • MABROUKI Issam, "Marches aléatoires dans les réseaux de capteurs sans fil", 2008
    • TREZENTOS Daniel "Medium Access Control for WPAN", 2005
    • NASREDDINE Jad, "Radio resource allocation in TDD UMTS systems", 2005
    • ENDERLE Nicolas, "Radio resource allocation for packet services in UMTS", 2003
    • MIHAILESCU Claudiu, "Radio ressource management for 3rd generation networks", 2000
    • BATHELT Alexander, "Graph models for analysis and planning of wireless networks", 1998
    • DROPMANN Ulrich, "Radio resource allocation for wireless networks with packet reservation", 1996
    • Deployment and optimisation of mobile relays for public transportations
    • Device-to-Device transmission mode for the Interrnet-of-Things
    • Resource allocation in 5G radio access networks
    • Hybridation of broadcast and multicast modes in 5G networks
    • Performance of low-power long range networks for IoT

    4G is the cutting-edge network technology that links millions of smartphones to the internet. But how does it actually work?

    "4G Network Essentials" is a 6-week Mooc (originally in french) developped by Institut Mines-Télécom, leaded by IMT-Atlantique and supported by the Patrick and Lina Drahi Foundation. It is now available in a full english version on the Edx platform.

    It will help you to understand the technology behind the apps and devices we use every day. You’ll get a solid overview of LTE/EPC (Long Term Evolution / Evolved Packet Core) 4G networks, how they work, how the network architecture is designed, and which protocols are used.

    Over the next few years, the advent of 5G will see over 20 billion mobile terminals go online. By mastering the key concepts of 4G, you can be ready for the next chapter in mobile networking—and the jobs of the future.

    The course is given every semester. Join us on edx

    You can watch the videos of week 1 at


    Some feedbacks on this course

    • "I really enjoyed learning through your course. I am a professional in the telecoms industry. This course filled many gaps in my knowledge of 4G networks." - Ilias, July 2017
    • "Phenomenal Course! Very well structured. Homeworks were interesting to solve. Instructors very pedagogical." - Opicto, July 2017
    • The best course I've ever pursued concerning 4G LTE. Everything you need to know about 4G LTE fundamentals is dealt in the course. Heart-felt thanks to IMT & edX! Myat Ko Ko, july 2017.