LYAZIDI Mohammed Yazid

PhD graduated
Team : Phare
Departure date : 11/27/2017

Supervision : Rami LANGAR

Co-supervision : Nadjib AIT SAADI

Dynamic Resource Allocation and Network Optimization in the Cloud-Radio Access Network"

Cloud Radio Access Network (C-RAN) is a future direction in wireless communications for deploying cellular radio access subsystems in current 4G and next-generation 5G networks. In the C-RAN architecture, BaseBand Units (BBUs) are located in a pool of virtual base stations, which are connected via a high-bandwidth low latency fronthaul network to Radio Remote Heads (RRHs). In comparison to standalone clusters of distributed radio base stations, C-RAN architecture provides significant benefits in terms of centralized resource pooling, network flexibility and cost savings. In this thesis, we address the problem of dynamic resource allocation and power minimization in downlink communications for C-RAN. Our research aims to allocate baseband resources to dynamic flows of mobile users, while properly assigning RRHs to BBUs to accommodate the traffic and network demands. This is a non-linear NP-hard optimization problem, which encompasses many constraints such as mobile users' resources demands, interference management, BBU pool and fronthaul links capacities, as well as maximum transmission power limitation. To overcome the high complexity involved in this problem, we present several approaches for resource allocation strategies and tackle this issue in three stages. Obtained results prove the efficiency of our proposed strategies in terms of throughput satisfaction rate, number of active RRHs, BBU pool processing power, resiliency, and operational budget cost.

Defence : 11/27/2017 - 14h - Site Jussieu 24-25/405

Jury members :

Pr. André-luc Beylot IRIT/ENSEEIHT – Toulouse [Rapporteur]
Pr.Yacine Ghamri Doudane L3i/Université de La Rochelle – La Rochelle [Rapporteur]
I.R Ilhem Fajjari Orange Labs – Châtillon
M.C HDR Anne Fladenmuller LIP6/UPMC – Paris
Senior Researcher Josep Mangues-Bafalluy CTTC – Barcelone
Pr.Nadjib Ait Saadi LIGM/ESIEE Paris – Noisy-le-Grand
Pr. Rami Langar LIGM/UPEM – Marne-la-Vallée

2016-2018 Publications