责任导师 : Rami LANGAR

助理责任导师 : AZOUZ SAIDANE Leila, AYARI Mouna

Gestion de la mobilité dans les réseaux Femtocells

Femtocell network are deployed in the macrocell’s coverage to provide extended services with better performances. Femtocells have a short-range and low power transmissions. Each FAP supports a few number of connected users. Owing to these inherent features, one of the most challenging issues for the femtocellular network deployment remains the mobility management. In this thesis, we propose new handovers algorithms adapted to the characteristics of femtocells network. As a first part, we consider the direction of mobile user as a key parameter for the handover decision.To do so, we propose a new handover algorithm called OHMF. Its main purpose is the optimization of the list of FAPs candidates based on signal quality as well as the mobile direction to better choose the FAP target. After that, we propose an algorithm called OHDP based on the direction prediction using the linear regression.The idea behind this is to predict the future position of mobile based on its current and previous position. As a second part, we focus on mobility prediction problem to make an efficient handover decision. We propose a novel handoff decision algorithm called OHMP that uses HMM as a predictor to accurately estimate the next FAP that a mobile UE would visit,given its current and historical movement information. In order to adapt our solution to the characteristics of femtocells network, we propose a handover algorithm called OHMP-CAC based on HMM tool as a predictor, a proposed CAC and the availability of resources of the predicted FAP, SINR and the traffic type. In order to assess the efficiency of our proposals, all underlying algorithms are evaluated through simulations and real mobility traces.

2013-2016 刊物

• 2016
  • Ah. Ben Cheikh : “Gestion de la mobilité dans les réseaux Femtocells”, 博士论文, 答辩 2016-12-12, 责任导师 Langar, Rami, 助理责任导师 : Azouz, SAIDANE Leila, Ayari, Mouna (2016)
  • Ah. Ben Cheikh, M. Ayari, R. Langar, L. Azouz Saidane : “OHDP: Optimized Handover with Direction Prediction Scheme Using Linear Regression for Femtocell Networks”, IFIP PEMWN 2016, Paris, France (2016)
  • Ah. Ben Cheikh, M. Ayari, R. Langar, L. Azouz Saidane : “OHMP-CAC: Optimized handoff scheme based on Mobility Prediction and QoS constraints for femtocell networks”, 2016 International Wireless Communications and Mobile Computing Conference (IWCMC), Paphos, Cyprus, pp. 936-941, (IEEE) (2016)
• 2015
  • Ah. Ben Cheikh, M. Ayari, R. Langar, G. Pujolle, L. Azouz Saidane : “Optimized Handoff with Mobility Prediction Scheme Using HMM for femtocell networks”, 2015 IEEE International Conference on Communications (ICC), Londres, United Kingdom, pp. 3448-3453, (IEEE) (2015)
• 2013
  • Ah. Ben Cheikh, M. Ayari, R. Langar, G. Pujolle, L. Azouz Saidane : “Optimized handover algorithm for two-tier macro-femto cellular LTE networks”, IEEE 9^th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), 2013, Lyon, France, pp. 608-613, (IEEE) (2013)