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This paper presents an online algorithm for mobile user speed estimation in 3GPP Long Term Evolution (LTE)/LTE-Advanced (LTE-A) networks. The proposed method leverages on uplink (UL) sounding reference signal (SRS) power measurements performed at the base station, also known as eNodeB (eNB), and remains effective even under large sampling period. Extensive performance evaluation of the proposed algorithm...
Coordinated Multi-Point (CoMP) systems appear as advanced promising strategies to improve user throughputs, especially in interference limited regions, at cell edge. Whether CoMP consists in jointly processing data from multiple transmission points, or in smartly coordinating the allocation of resources, CoMP implementation requires significant computation effort, signaling exchange that may impact...
Estimating mobile user speed is a problematic issue which has significant impacts to radio resource management and also to the mobility management of Long Term Evolution (LTE) networks. This paper introduces two algorithms that can estimate the speed of mobile user equipments (UE), with low computational requirement, and without modification of neither current user equipment nor 3GPP standard protocol...
Small cell networks promise to boost the capacity and provide good QoS (Quality of Service) to cell edge users. However they pose serious challenges, especially in the case of high speed unidirectional (e.g., users traveling on highways or in metros) users, in the form of frequent handovers. The extent of the handover losses depend greatly upon the speed of the user and it is shown previously that...
Automatic configuration and optimization of networks is a key concept in Long Term Evolution (LTE) systems. Handover (HO) performances are differentiator indicators among mobile networks. In this context, we propose a self-organized solution for the LTE handover parameters set up, based on mobility performance indicators that are accurately specified by the standard. The proposed solution consists...
We propose in this paper an enhanced Inter Cell Interference Coordination (ICIC) mechanism based on Multi Armed Bandit (MAB) approach that aims at maximizing not only the throughputs of the attached users but also their HandOver (HO) performances evaluated through 3GPP Mobility Robustness Optimization (MRO) indicators. To this end, the MAB procedure explicitly takes into account the HO performances...
In this paper, we investigate the interaction between two major technical challenges for LTE small cells deployment, in order to face the explosive increase of the traffic growth. These challenges are 1-Inter-Cell Interference Management which becomes critical in dense deployment of small cells and 2-Mobility Management since the handover frequency between close-by cells increases considerably. These...
This articles proposes a smart resource sharing algorithm to manage interference in LTE networks. Relying on reinforcement learning theory, the proposed Cyclic Multi Armed Bandit (CMAB) algorithm steers each cell in the choice of the most suitable frequency band portions, in autonomous manner. Thanks to the traffic aware feature, the algorithm adapts as well to the real needs of the cell. Adding to...
Resource allocation is an important prerequisite for the effective deployment of Pico Cells (PCs). This topic becomes even more challenging in the case of heterogeneous networks, where autonomous interference management mechanisms are necessary. In this article, we propose a resource sharing method inspired from the reinforcement learning theory and particularly the methods used to solve the Multi...
In this paper, we address the problem of spectrum sharing for LTE pico cells (PCs) networks with heterogeneous traffic loads. Distributed mechanisms are designed to steer the PCs in selecting the most suitable resources so that the overall throughput is maximized. The goal is to respond to the real traffic needs, while ensuring users fairness. Dynamic Cooperative Algorithms (DCA) relying on information...
To fulfill the needs for high speed ubiquitous coverage, fourth generation networks give rise to dense deployments of short range cells, such as femtocells. Generally deployed in residential or business areas, they complement the macrocellular service, thanks to guaranteed indoor coverage and improved multimedia experience. However, the addition of user-installed femtocells along with macrocells in...
We consider the problem of sharing spectrum between different base stations in an OFDM network where some cells have a small radius. Such scenarios will become increasingly common in fourth generation networks where the need for ubiquitous high-speed coverage will lead to an increased use of small cells as well as indoor femtocells. Our aim is to devise autonomous algorithms for small cells and femtocells...
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