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Статті в журналах з теми "5G (téléphonie mobile)"
Roche, Edward M., Benjamin H. Dickens-Jr., and Walker Townes. "La prochaine génération de téléphonie mobile (5G) et ses implications (Infrastructure, Réglementation)." Netcom, no. 32-1/2 (December 16, 2018): 139–62. http://dx.doi.org/10.4000/netcom.2869.
Повний текст джерелаAchilleas, Philippe. "La bataille de la 5G et le droit international." Annuaire français de droit international 66, no. 1 (2020): 709–31. http://dx.doi.org/10.3406/afdi.2020.5489.
Повний текст джерелаДисертації з теми "5G (téléphonie mobile)"
Zhang, Chao. "Caractérisation des performances limites des jeux non-coopératifs avec observation imparfaite : application à la téléphonie mobile 5G." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS570/document.
Повний текст джерелаA large part of the results reported in this thesis is based on an observation which has never been made for wireless communications and power control in particular: transmit power levels and more generally transmit covariance matrices can be exploited to embed information such as coordination information and available interference-dependent feedback samples can be exploited as a communication channel. First, we show that the famous iterative water-filling algorithm does not exploit the available information sufficiently well in terms of sum-utility. Indeed, we show that global channel state information can be acquired from the sole knowledge of an SINR-type feedback. A natural question then arises. Is it possible to design a distributed power control algorithm which exploits as well as possible the available information? To answer this question, we derive the characterization of the utility region for the considered problem and show how to exploit this characterization not only to measure globally efficiency but also to obtain globally efficient one-shot power control functions. Motivated by the success of our approach for single-band and multi-band interference networks, we asked ourselves whether it could be exploited for MIMO networks. We have identified at least one very relevant scenario. Indeed, we show that opportunistic interference alignment can be implemented by only assuming interference-plus-noise covariance feedback at the secondary transmitter. Then, in the last chapter, we generalize the problem of quantization, the motivation for this being given by some observations made in the previous chapters. First, we assume that the quantizer and de-quantizer are designed to maximize a general utility function instead of the conventional distortion function. Second, we assume that the quantizer and de-quantizer may have different utility functions. This raises non-trivial technical problems, our claim is to make a very first step into solving them
Mohammadi, Alireza. "Cloud Native MANO for Next Generation Mobile Networks." Electronic Thesis or Diss., Sorbonne université, 2023. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2023SORUS633.pdf.
Повний текст джерелаThis thesis crystallizes significant contributions pivoted around integral concepts such as Consistent DevOps and Declarative Automation to realize the envisioned cloud-native MANO. These principles are applied in the context of multi-x systems, where ‘x’ represents various dimensions such as RAN vendor, OS, and cloud, addressing the level of heterogeneity and diversity in the modern networks. Interpreting multi-x as a cloud-native extension to the Open RAN ecosystem, the thesis is conceived and validated through a concrete proof-of-concept prototype for multi-vendor 5G networks. This addresses the complexities of next generation private and public cloud-native MANO systems by incorporating advanced technologies such as eBPF and recent developments in the cloud-native domain, including Kubernetes
Oussakel, Imane. "4G/5G cellular networks metrology and management." Thesis, Toulouse 3, 2020. http://www.theses.fr/2020TOU30261.
Повний текст джерелаThe proliferation of sophisticated applications and services comes with diverse performance requirements as well as an exponential traffic growth for both upload and download. The cellular networks such as 4G and 5G are advocated to support this diverse and huge amount of data. This thesis work targets the enforcement of advanced cellular network supervision and management techniques taking the traffic explosion and diversity as two main challenges in these networks. The first contribution tackles the intelligence integration in cellular networks through the estimation of users uplink instantaneous throughput at small time granularities. A real time 4G testbed is deployed for such aim with an exhaustive metrics benchmark. Accurate estimations are achieved.The second contribution enforces the real time 5G slicing from radio resources perspective in a multi-cell system. For that, two exact optimization models are proposed. Due to their high convergence time, heuristics are developed and evaluated with the optimal models. Results are promising, as two heuristics are highly enforcing the real time RAN slicing
Taghavian, Masoud. "VNF placement in 5G Networks using AI/ML." Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0421.
Повний текст джерелаThe inevitable transition from physical hardware devices towards lightweight reusable software modules in Network Function Virtualization (NFV) introduces countless opportunities while presenting several unprecedented challenges. Satisfying NFV expectations in post-5G networks heavily depends on the efficient placement of network services. Dynamic allocation of physical resources for online service requests demanding heterogeneous resources under specific QoS requirements represents one of the most important steps in NFV design, and a NP-Hard problem to solve. This complexity is encountered in various 5G NFV use-cases, which are related to the placement, from VNF Forwarding-Graphs and Network Slicing, to the virtualization of the Core Network, CDN, IoT, etc., investigating numerous objectives in the literature, ranging from resources-based multi-objective optimizations to the energy consumption, cost of revenue, service acceptance, resiliency, availability, security, etc. In this thesis, we are interested in placing the virtual network services over the network by trying to maximize the number of accepted services considering their QoS requirements. Although the VNF placement problem has been studied for many years, the need for an approach that could find a fair compromise between optimality and scalability still exists. In this thesis, we study several problems and challenges in network service placement and propose AL/ML solutions accordingly
Ferrer, Pierre. "Contribution à l'étude et à la réalisation d'un frontal radiofréquence à base de séquences de Walsh pour le standard 5G et au delà." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0442.
Повний текст джерелаMobile telecommunications services require a continuous and exponential increase of their capacities. To meet this demand, transceivers must be highly digital and flexible. A promising solution to achieve this goal is to use Walsh sequences to generate arbitrary waveforms. This is based on the principle of a "software defined radio" transmitter comprising a high-speed, high-resolution DAC. Thus, the studied architecture consists of a very wide band DAC (0 to 6 GHz) very efficient for a direct RF amplification with 5G phase 1 applications as target and a Hilbert Transform based signal shaping for a millimetric frequency upconversion (beyond 20GHz) without resorting to complex filtering techniques with 5G phase 2 or 6G applications as target. The objective of this work is to propose a new transmitter topology that responds to issues such as: massive data conversion (very high throughput), carrier aggregation and dynamic linearization of an RF front end. The candidate will demonstrate the proposed architecture using ST Microelectronics 28nm FDSOI technology. The work will include high level simulations (MatLab), architecture sizing, schematic simulations, mask designs, circuit fabrication, design of a suitable measurement environment and comprehensive measurements
Bazin, Alexis. "Massive MIMO for 5G Scenarios with OFDM and FBMC/OQAM Waveforms." Thesis, Rennes, INSA, 2018. http://www.theses.fr/2018ISAR0019/document.
Повний текст джерелаESUME DE LA THESE EN ANGLAIS With the increase of the global data tmffic, the multiplication of co1mected devices and the diversification of the communication types, the fifth generation of cellular networks (5G) has to overcome a se1ies of challenges. In this context, massive MlMO systems hold a wide range of benefits by using a large number of antennas combined with appropriate signal processing techniques. Additionally, the use of the FBMC/OQAM modulation instead of the classical OFDM modulation may enhance the performance of the systems in cer1ain situations. Firstly, this thesis focuses on vehicular scenarios. In par1icular, massive MIMO systems are proposed to overcome the interference due to the Doppler effect for the uplink. We thus analytically highlight that increasing the number of receive antermas induces a drastic reduction of the impact of the Doppler effect. Moreover, the perfonnance of the OFDM and the FBMC/OQAM modulations are compared in this context for Non-Line-Of-Sight (NLOS) and Line-Of-Sight (LOS) environments. The second scenario investigated in this thesis considers communications in wide underse1ved areas. In this context, massive MIMO systems allow to create a long-range wireless back.haul link between two base stations. Thereby, the cost of deployment of the cellular networks is reduced. In this thesis r a new massive MLMO precoding technique is proposed in order to use the same fequency band for the backhaul link and the access links. Moreover, the impact of a desynchronization between the back haul link and the access links is studied and the use of the FBMC/OQAM modulation for the backhaul link is discussed
Arrano, Scharager Hernan. "Full-duplex for cellular networks : a stochastic geometry approach." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAT001.
Повний текст джерелаFull-duplex (FD) is a principle in which a transceiver can receive and transmit on the same time-frequency radio resource. The principle was long held as impractical due to the high self-interference that arises when simultaneously transmitting and receiving in the same resource block. When assuming perfect self-interference cancellation, FD can potentially double the spectral efficiency (SE) of a given point-to-point communication. In practice though, it is not possible to achieve the aforementioned characteristic. Moreover, under a cellular network context, not only the self-interference limits the performance, since additional co-channel interference is created by base stations (BSs) and users equipment (UEs). However, even with the higher interference dowlinks (DLs) still obtain higher SE performances, whereas uplinks (ULs) are generally critically degraded, when compared to half-duplex (HD). We focus our work in the study of alternatives that can help improve the impaired ULs in FD networks, while still trying to profit from the gains experienced by DLs.In this regard, we use stochastic geometry along the thesis as a means to characterize key performance indicators of cellular networks, such as: coverage probability, average SE and data rates. The thesis is divided into three major studies. Firstly, we propose a duplex-switching policy which enables BSs to operate in FD- or HD- depending on the UL and DL conditions. Secondly, we investigate the performance of hybrid HD/FD networks under a millimeter wave context. Finally, we propose a novel algorithm based on nonorthogonal multiple-access (NOMA) and successive interference cancellation (SIC), which allows BSs to coordinate on their respective transmission schemes to reduce the BS-to-BS interference. We demonstrate that the models presented in the thesis allow to balance the gains of one link over the other; reducing the UL degradation, while maintaining DL gains. In addition, we show that scenarios in which equipment is able to perform beamforming are ideal for FD deployments, since they directly reduce the cochannel interference
Nguyen, Thanh-Son-Lam. "Wireless Resource Allocation in 5G-NR V2V Communications." Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASG052.
Повний текст джерелаThis doctoral dissertation explores the enhancement of wireless resource allocation in Vehicle-to-Everything (V2X) communications, as specified by the 3GPP Release 16 standard. The specific area of our research is the NR-V2X Sidelink communication, also known as the New Radio-Vehicles to Vehicles (NR-V2V) communication. Our goal is to formulate a novel optimization protocol that not only guarantees high-quality services (QoS) but also outperforms existing methodologies in NR-V2V communication.Initially, we introduce Adaptive Physical Configuration (APC), a search-based algorithm designed to identify the optimal physical layer configuration within a set of environmental factors, specifically tailored for a broadcast communication scheme. Following this, we evolve APC into a Radio Aware variant (RA-APC), broadening its scope by incorporating unicast communication and establishing a more flexible structure for PHY resources. In the final phase, we further refine RA-APC by integrating a machine learning algorithm, specifically a decision tree. This integration uncovers patterns within the input factors, thereby augmenting both the accuracy and efficiency of the allocation optimization process
Mishra, Debashisha. "Exploiting the synergies of unmanned aerial vehicles (UAVs) and 5G network." Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0058.
Повний текст джерелаAs an expanding subject of aerial robotics, Unmanned Aerial Vehicles (UAVs) have received substantial research attention within the wireless networking research community. As soon as national legislations enable UAVs to fly autonomously, we will witness swarms of UAV filling the skies of our smart cities to complete diverse missions: package delivery, infrastructure monitoring, event videography, surveillance, tracking, etc. Fifth generation (5G) and beyond cellular networks can improve UAV communications in a variety of ways and thus benefit the UAV ecosystem. There is a wide variety of wireless applications and use cases that can benefit from the capabilities of these smart devices, including the UAV's inherent characteristics of agile mobility in three-dimensional space, autonomous operation, and intelligent placement. The broad goal of this thesis is to provide a comprehensive analysis of the synergies that may be realized when combining 5G and beyond cellular networks with UAV technology. This thesis presents four types of UAV and cellular ecosystem integration models. "UAV-assisted cellular paradigm" refers to communication scenarios in which UAVs are used as flying (or aerial) base stations or as relays to augment current terrestrial cellular connectivity or to mitigate disaster situations. The "cellular-assisted UAV paradigm" foresees the integration of UAVs into the current cellular network as a new aerial user (flying UE) to serve a wide variety of applications and use cases. The "UAV-to-UAV paradigm" stresses the collective strength of a fleet of UAVs as a swarm and communication amongst UAVs inside the swarm. The "hybrid non-terrestrial paradigm" encompasses satellite and aerial networks, therefore examining the whole spectrum of communication links from the ground to the air to the space in the form of an integrated space-air-ground communication network. Initially, this thesis focuses on aerial base stations, which have gained great academic attention in order to provide flexible, on-demand communication services to ground users. On this occasion, we build and construct a proof-of-concept prototype platform that delineates the design components required to implement such platforms in the real world, and we then explain the necessity for optimal placement of aerial base stations for increasing communication services. To support a heterogeneous class of 5G services from various vertical industries (referred to as tenants of 5G network operators), we propose a slicing-aware aerial base station framework in which ground users with differentiated traffic requirements in terms of data rate, latency, and massive deployment are supported through intelligent resource provisioning. Second, we describe aerial users who are supported by current cellular infrastructure and examine difficulties such as coexistence of aerial users and ground users, handovers, and communication-aware trajectory optimization. The use of a swarm of UAVs is considerably more cost-effective as compared to a single UAV conducting a mission when considering realistic mission goals. A swarm of UAVs opens up new opportunities for new services and applications since the UAVs may independently coordinate their operations and work together to complete a given task. Due to the spatio-temporal dynamics of swarm topology, dependable network development with seamless communication amongst UAVs is essential for any operation to be successful. As part of this thesis, we offer centralized and decentralized network models for UAV-to-UAV (U2U) communication inside swarm and conduct a full investigation of sidelink-assisted U2U communication with performance assessment
Khizar, Sadia. "Metrology for 5G edge networks (MEC). Leveraging mobile devices beyond the edge toward task offloading." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS069.
Повний текст джерелаThe pervasiveness of mobile devices equipped with internet connectivity and positioning systems leads us to regard them as a valuable resource to leverage. In this thesis, we tackle the use of mobile devices from a new perspective. We consider the extension of the capacity of the MEC by using the available resources of mobile devices beyond the edge of the infrastructure network. The goal is to leverage their untapped resources to process computation on behalf of the MEC in a distributed way. It is fundamental for the MEC to be aware of its operating environment to rely on mobile nodes. In the first part of the thesis, we have focused on the temporal availability of beyond-the-edge resources. We chose to investigate the co-location of terminals and analyze their persistence in a cell. Then, we turn our attention to task allocation. We shift the focus on the spatio-temporal aspect by quantifying the resources that a cell can provide to perform a MEC task. We estimate the potential amount of computational tasks performed by nodes based on the cumulative presence time in a given cell and a given completion delay. Results provide insight into the possibilities of offloading computing tasks on mobile nodes. Furthermore, it allows knowing the locations where it is advisable to offload tasks and the time duration of tasks offloadable
Книги з теми "5G (téléphonie mobile)"
5G Radio Access Networks: Centralized RAN, Cloud-RAN and Virtualization of Small Cells. Taylor & Francis Group, 2017.
Знайти повний текст джерелаArslan, Hüseyin, and Ertuğrul Başar. Flexible and Cognitive Radio Access Technologies for 5G and Beyond. Institution of Engineering & Technology, 2020.
Знайти повний текст джерелаFlexible and Cognitive Radio Access Technologies for 5G and Beyond. Institution of Engineering & Technology, 2020.
Знайти повний текст джерелаRamzan, Naeem, and Muhammad Zeeshan Shakir. AI for Emerging Verticals: Human-Robot Computing, Sensing and Networking. Institution of Engineering & Technology, 2021.
Знайти повний текст джерелаAI for Emerging Verticals: Human-Robot Computing, Sensing and Networking. Institution of Engineering & Technology, 2020.
Знайти повний текст джерела