Dissertations / Theses on the topic '5G technology'
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Monje, Real Alberto. "Filters for 5G mmWave." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260071.
Full textPeriodiska strukturer är ett forskningsfält på framväxt när det kommer tilldesign av mikrovågskomponenter. Sådana strukturer har visat sig kapabla att tillhandahålla kompakta och effektiva lösningar till problem såsom läckage och undertryckning av ytvågor. Dessutom, de har visat sig användbara i andra mikrovågsrelaterade områden, så som designen av linsantenner och ”gap”-vågledare. Dock återstår det fortfarande att undersöka möjligheterna för periodiska strukturer i designen av filter.Huvudbidraget av den här avhandlingen är introduktionen av en ny typ av geometri, som har visat sig öka dämpningsegenskaperna av toppmodern struk-turer.I detta arbete studeras periodiska strukturer med målet att utforska dess användbarhet i filter, och ett komplett filter designas med bas i dessa undersökningar. Filtren har ett passband på millimeterfrekvenser (28 GHz), med tilltänkt användningsområde för 5G. I detta användningsområde är det viktigt att undertrycka övertoner som återfinns på dubbla passbandsfrekvensen, vilket tagits i åtanke.Hela designen och designprocessen förklaras i avhandlingen; vi börjar med studien av enhetscellen som analyseras med dispersionskurvor, och vi fortsätter med designen av filtret, och avslutar med designen av matchningssektionen mellan filtret och en koaxialkabel. Vissa numeriska metoder kommer att förklaras för att bättre förstå strukturen och för att accelerera beräkningarna. En prototyp tillverkas och testad för att utvärdera prestandan, och jämförelsermed simuleringsresultat är gjorda.
Bulashenko, A. V., and I. V. Zabegaloff. "5G ultra dense networks." Thesis, Sumy State University, 2017. http://essuir.sumdu.edu.ua/handle/123456789/66962.
Full textБулашенко, А. В., and І. В. Забегалов. "Частотний діапазон майбутніх мереж 5G." Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/66956.
Full textTorres, Florent. "Power amplifier design for 5G applications in 28nm FD-SOI technology." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0064/document.
Full textThe 5G future mobile network is planned to be deployed from 2020, in a context of exponential mobile market and exchanged data volume evolution. The 5G will leverage revolutionary applications for the advent of the connected world. For this purpose, several network specifications are expected notably low latency, reduced power consumption and high data-rates even if no standard is yet defined. The frequency bands traditionally used for mobile networks will not permit the needed performances and several mmW frequency bands are under study to create a complementary frequency spectrum. However, these mmW frequency bands suffer from large attenuation inbuilding material and in free-space. Therefore, several techniques will be implemented to tackle these limitations indense urban areas like backhauling, FD-MIMO and beamforming phased array. This is leading to a large number of transceivers for base stations and end-user devices. CMOS technology offers undeniable advantages for this mass market while FD-SOI technology offers additional features and performances. The power amplifier is the most critical block to design in a transceiver and is also the most power consuming. To address the 5G challenges, several specifications concerning power consumption, linearity and efficiency are expected. The environment variations inbeamforming phased array and the industrial context drive the need for robust topologies while power amplifier reconfigurability is benefic in a context of adaptive circuits. This thesis addresses these challenges by exploring the conception of a robust and reconfigurable power amplifier targeting 5G applications while integrating specific design techniques and taking advantage of 28nm FD-SOI CMOS technology features for reconfigurability purposes
Mostafavi, Seyed Samie. "Vehicular Positioning Using 5G and Sensor Fusion." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-266117.
Full textDe senaste framstegen inom telekommunikationsindustrin och de resulterandeapplikationerna som autonoma fordon, fordonsövervakning och trafiksäkerhethar ökat efterfrågan på exakta fordonspositioneringssystem. ExisterandeGlobal Navigation Satellite System (GNSS) baserade positioneringsteknikerhar en betydande prestandaförlust i tunnlar och urbana kanjoner. Forskninghar visat att radiobaserade positioneringstekniker har mindre distributionskostnaderoch kan vara mer exakta än satellitbaserade navigationssystem.I den femte generation av mobilkommunikation (5G) används tekniker sommillimeterWave (mmWave) och multiple-input multiple-output (MIMO) därradio-terminaler består av stora matrisantenner och arbetar med stora bandbredder.Dessa funktioner gör 5G-system gynnsamma för positionering medhög noggrannhet. Å andra sidan har informationsfusion av Inertial NavigationSystems (INS) och andra positioneringstekniker vanligen använts för attutveckla mer robusta och exakta spårningssystem. I denna studie föreslår viett INS/5G-positioneringssystem för att spåra landfordon baserat på Kalmanfiltret. Vi adresserar systempositioneringsgränserna i termer av 5G nya radio(NR) subsystem och en detaljerad analys av beroendet av rotmedelfelteradkvadratfel (RMSE) för olika systemparametrar som utförs. Systemet testas iett enkelt simuleringsbaserat experiment som består av en rak motorväg medbasstationerna placerade bredvid det. Slutligen visar våra numeriska resultatatt det föreslagna systemet är i stånd att lokalisera ett UE-monterat fordon medsub-meter lägesfel även i närvaro av hård siktlinje blockering.
Adebomehin, Akeem A. "Ultrawideband IEEE802.15.4a cognitive localization methods for the 5G environment." Thesis, University of Essex, 2017. http://repository.essex.ac.uk/20006/.
Full textGuzel, Nazim Beysin, and Ogul Tasman. "Diffusion of 5G Technology and Potential Impact on Business Models : Technology Enabled Value Creation in the Cleaning Industry." Thesis, Uppsala universitet, Industriell teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-447298.
Full textAzadehnia, Arefeh. "What benefits will 5G be for small and mid-sized companies?" Thesis, Högskolan i Gävle, Avdelningen för elektroteknik, matematik och naturvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30727.
Full textSaeidian, Sara. "Deep Reinforcement Learning for Downlink Power Control in Dense 5G Networks." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265675.
Full textDet här examensarbetet undersöker kraftallokering i nedlänksriktning för täta5G-nätverk och försöker utveckla en datadriven lösning genom användning avdeep reinforcement learning. Vi tränar och testar flera reinforcement learningagentermed deep Q-networks (DQN) algoritmen, och de så kallade ”Rainbowextensions” av DQN. Prestandan av varje agent testas på storskaliga tätortsscenarionför 5G, och jämförs med en fast kraftallokeringsmetod.Våra testresultatvisar att DQN-modellerna leverar högre överföringshastigheter vid cellkanten,samtidigt som metoden fungerar väl för okända simuleringsscenarion. Utöverhastighetsökningen så balanserar agenterna dataflödet, vilket leder till rättvisallokering bland användarna i nätverk med ”full-downlink-buffer”-trafik genomatt korrekt designa belöningssignalen.
Habib, Imran. "5G@15 GHz Testbed Development and Evaluation." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-240420.
Full textTack vare teknikutveckling och ökning i mängden data som sänds trådlöst, hardatatakterna ökat enormt under de senaste decennierna. Den senaste trended inomtrådlös kommunikationärövergången från 4G till 5G. För att möte framtida krav,finns det därför behov av ytterligare teknologiutveckling, t ex i modulationstekniker och kanalaccessmetoder. Många forskningsinstitut runt om i världen investerar därför i forskning och utveckling av 5G.Radiovågor har använts under väldigt lång tid för mobil kommunikation, men tillverkare och operatörer experimenterar med sändningar i millimetervågsområdet, som använder högre frekvenser i området från 6GHz till 300GHz. Egenskaper såsom effektdämpning, SNR, interferens, osv, behöver utvärderas för dessa högre frekvenser. Eftersom utvecklingen av 5G fortfarande är i en tidig fas, finns inte så många testverktygtillgängliga för prestandautvärdering. En testbädd är ett testverktyg som användsför att utföra rigorös, transparent och upprepningsbar testning, experimentering och prestandautvärdering av data som har sänts vid dessa höga frekvenser.Denna rapport utvärderar implementationsstrukturer för en 5G-testbädd vid 15GHz,och dess prestanda i inomoch utomhusscenarier. Den beskriver även metoder försignalgenerering via Matlab och sändning vid 15GHz mha Xilinx FPGA och Analog devices’ FMCOMMS5 radiomoduler. Signalen sänds sedan via patch-antenner från Ericsson AB. Olika metoder användes för att förbättra signalen, både med radiofrekvens hårdvara och mjukvarumoduler. Olika kanalmätningsmetoder har använts för att nå synkronisering mellan sändaroch mottagarnoderna, för att mäta kanalegenskaper. Alla experimenten utfördes genom att implementera en SISO-modul (en sändarresp. mottagarantenn) av 5G-testbädden. Detta SISO-system kan enkelt utökas till ett MIMO system (flera sändaroch mottagarantenner) genom att replikera SISO-systemet.Resultaten visar att 5G-testbädden är redo att användas för att nå bättre förståelse av framtida teknologin. Slutsatsen är att testbädden erbjuder en tämligen påliglig plattformför att utvärdera prestanda för 5G-teknologi.
Dridi, Mohamed Amine. "Platform-based 5G service design and orchestration." Electronic Thesis or Diss., Institut polytechnique de Paris, 2021. http://www.theses.fr/2021IPPAS002.
Full text5G networks and beyond will have to support an exponential growth in numbers of connected devices of different types, as a pillar of a global accelerated digitization movement. In addition to hyperscale characteristics, these networks will also have to support a diverse set of connectivity services for new industries with heterogeneous requirements. 5G network designers and developers are then compelled to provide new solutions and optimize the existing ones to contain increasing bandwidth demands and higher Quality of Experience (QoE) expectations. These networks also need to be highly customizable to adapt to varying use-cases and highly automated to shorten time-to-market delays. The expected characteristics of 5G networks inspired mobile network providers to radically change the way they design and develop their solutions by adopting an extensive softwarization strategy. Mobile networking domain and the rest of the IT world are then converging and mobile network providers can then benefit from thriving software and cloud computing ecosystems with state-of-the-art practices and tools. Software-based network functions would allow these providers to have the necessary levels of programmability and reconfigurability they need to deal with such a fast-paced evolution of mobile connectivity. This thesis aims at providing a few optimizations of different parts of 5G networks and the way they are deployed and managed, hoping that it would contribute in solving some of the problems that network designers are facing. It proposes solutions to specific problems related to the physical layer processing in 5G networks for interference mitigation, as well as generic issues related to network automation and customization. We built in this thesis an end-to-end network service fabric composed of a Radio Access Network (RAN), core and orchestration platform using Metaplatform concepts and tools. The first part treats the issue of Intercell Interference (ICI), which is expected to be a liability with a foreseen antenna densification in 5G networks. We propose a solution to mitigate ICI in Uplink (UL) transmissions, based on Joint Detection (JD) technique. The proposed solution satisfies the architectural, functional and technical requirement of JD integration in practical networks. We incorporate the JD solution in a RAN platform in the second part and extend this platform with other capabilities. We adopt the same approach in the third part of this thesis to provide a solution to automate core network deployment and life-cycle management in a Network Function Virtualization (NFV) environment and create a reusable core network platform orchestrated by Open Network Automation Platform (ONAP)
Mirza, Helen, and Erika Wahlstén. "Capturing the Value of 5G in Smart Manufacturing." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300170.
Full textLeverantörer av nästa generations mobilnät, 5G, utlovar ökad prestanda som kan garantera smart manufacturing. Smart manufacturing innebär system av trådlösa och anslutna sensorer, robotar och andra enheter som tillsammans optimerar tillverkningsprocessen med hjälp av data. Samtidigt har 5G blivit en av de stora teknologiska trenderna inom tillverkning. Globalt görs ansträngningar för att optimera monteringslinor genom smart manufacturing, men det finns ännu inga bevis för 5G:s utlovade prestanda i praktiken. Denna studie behandlar hur ett industriföretag som erbjuder smarta verktyg ska fånga värdet av 5G i affärsmodellen. Detta görs genom att undersöka om och i sådant fall vilka unika funktioner 5G tillhandahåller, om kunderna är redo för denna teknik och hur 5G kommer att påverka affärsmodellen. Studien grundar sig i en fallstudie på Atlas Copco AB, ett svenskt industriföretag med global närvaro. Studien gjordes i samarbete med Atlas Copcos affärsområde för Industriteknik, inom divisionerna för General Industry och Motor Vehicle Industry. Data samlades in genom intervjuer, både internt på Atlas Copco och externt med deras kunder och kombinerades sedan med en litteraturstudie. Resultaten från denna studie kan sammanfattas enligt följande: • 5G möjliggör anslutning som krävs för processer som är kopplade till smarta manufacturing.• Kunderna är i olika faser av 5G-adoptionen.• Det finns en skillnad i vilka egenskaper kunderna värderar och därför kommer 5G inte att ge samma värde till alla kunder. • Affärsmodellen måste sannolikt ändras till en mer serviceinriktad modell när man erbjuder 5G för att fullt ut kunna fånga värdet av 5G. I slutet av studien ges en sammanfattning av studiens konceptuella och empiriska bidrag samt förslag på framtida arbete.
Mattsson, Martin. "A Cost-Effective Luneburg Lens Based on Glide-Symmetric Metasurface for 5G Applications." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-260088.
Full textI det här arbetet presenteras en kostnadseffektiv plan Luneburg linsantenn för Ka-bandet.Antennen har tillämpningar inom högfrekventa applikationer inom framtida kommunikationsnätverk såsom 5G-nätet på grund utav sin enkla matning, höga direktivitet, och låga förluster.±Linsen består av två parallella ytor med glidsymmetriska hål. Hålen är skräddarsydda så att det nödvändiga brytningsindexet för en Luneburg lins uppnås. För att realisera det högsta nödvändiga brytningsindexet placeras en rund dielektrisk skiva mellan linsens övre och undre yta. Glidsymmetri används för att tillhandahålla ultrabredbandsegenskaper och öka det ekvivalenta brytningsindexet hos den håliga strukturen. Olika typer av konfigurationer av håliga glidsymmetriska enhetsceller med olika dielektriska material har studerats för att hitta en enkel och kostnadseffektiv lösning. Linsen matas med elva vågledare för att kunna stråla inom ett vinkelområde på 50◦ i azimutplanet. Vågledarmatningen har en sektion där höjden ändras i ett antal steg för att matcha sin impedans till impedansen från mellanrummet av de två parallella ytorna. Linsen avslutas med en endimensionell hornstruktur för att minimera reflektioner mellan linsen och fri rymd.Den slutgiltiga designen är en lins med centerfrekvensen på 28 GHz med en 20% bandbredd. Reflektionskoefficienten är lägre än -11.5 dB och överhörningen är lägre än-16 dB för hela frekvensbandet. Linsen har en antennvinst på 16.7 dB vid 28 GHz. Strålningseffektiviteten är på 73% vid 28 GHz med en förlust på 19% i metallen och 1.8%i det dielektriska materialet.
Sjögren, Martin. "5G Turntable Test Rig, A Two Degree of Freedom System for Antenna Characterisation." Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-236514.
Full textThis Master’s thesis has investigated which components and what control strategy shall be used to develop a two-degree-of-freedom turntable for antenna characterisations. The mechanical design of the turntable was firstly implemented, on which basis the electrical components were chosen. The most important components in the turntable are the two motors, each of which handles one degree of freedom. To avoid electromagnetic interference, the brushless DC motor type was chosen. These motors were thereafter designed to be controlled by a rule-based online tuned PID controller. Simulations of the new turntable design showed promising results, in both positioning accuracy and controllability of electromagnetic interference. Under a step input of the desired position, a conventional controller would generate an instantaneous and aggressive control signal (voltage demand), i.e. high electromagnetic interference. By contrast the rule-based controller could create a smooth inclining voltage demand, thus reducing the EMI from the motors.
Raheem, Rand. "Interference management and system optimisation for Femtocells technology in LTE and future 4G/5G networks." Thesis, Middlesex University, 2016. http://eprints.mdx.ac.uk/21255/.
Full textZheng, Jiacheng. "Handling of Intra-UE Uplink Overlapping Grants for Heterogeneous Traffic in 5G Wireless Systems." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-278207.
Full text5G-system betraktas som en trådlös kommunikationsplattform som kan stödjaolika scenarier inklusive industriell IoT. Flera utmaningar måste hanteras föratt 5G NR ska möjliggöra industriell automatisering, till exempel effektiv multiplexeringbland heterogena industritrafiktyper. Den industriella trafikens heterogenitetberor på den samtidiga existensen av flera kritiska och icke-kritiskatrafiktyper även inom en enda UE, dvs 1) Periodisk deterministisk, 2) Aperiodiskdeterministisk, och 3) Icke-deterministisk. Det har gjorts flera studier föratt uppnå kritiska trafikkrav. Emellertid fokuserar denna studie på att upprätthållaQoS för kritisk trafik och samtidigt öka effektiviteten. Metoden som valtsför att uppnå ett sådant mål i denna studie är för gNB att skicka överlappandebidrag med olika robusthet. Dessutom fokuserar vi på att hantera överlappandebidrag inom ramen för Intra-UE-upplänkscenariot, från MAC-lagers perspektiv.Huvudfördelen med våra lösningar är att det kräver mycket låg komplexitet(jämförelse med andra lösningar, t.ex. punktering, spektrumdelning) vilketresulterar i minimala ändringar av befintliga standardiseringsspecifikationer.Med hjälp av en Java-baserad simulator på systemnivå visar våra resultat attden föreslagna lösningen kan förbättra UE: s kapacitet med upp till 25,9% underspecifika simuleringsinställningar, samtidigt som latenskraven bibehålls.
Ahmed, Shakil. "Robust Resource Allocation to Secure Physical Layer Using UAV-Assisted Mobile Relay Communications in 5G Technology." DigitalCommons@USU, 2019. https://digitalcommons.usu.edu/etd/7575.
Full textAlaji, Issa. "Design and characterization of power detectors in 55-nm BiCMOS technology for 5G and THz applications." Thesis, Lille, 2020. http://www.theses.fr/2020LILUI080.
Full textPower detectors are the key blocks to establish the power measurement. Therefore, they are considered among the most important circuits in many microwave and millimeter wave applications (such as communication systems, medical equipments, radar systems, etc.). In this context, this thesis presents the design, characterization and theoretical analysis of different diode based power detectors, built in 55nm-BiCMOS technology from STMicroelectronics, in different frequency bands, towards different applications. For 5G applications in the frequency band (35-55) GHz, tunable detectors are designed to be used in different applications, since their parameters can be adjusted. In addition, several topologies of zero bias detectors are designed to help improving the efficiency in the 5G and IoT devices. This can be realized by employing those detectors in envelop tracking circuits which reduce the power consumption of power amplifiers. Two frequency compensated detectors in the frequency bands (140-220) GHz and (450-600) GHz are designed providing stable and high sensitivity value over the whole frequency band of interest. These detectors can be used for on-chip power detection which helps increasing the power measurement efficiency at such high frequencies. These detectors can be also used in THz applications such as THz imaging and radars. Some detectors in this work reach the state of the art performances in several frequency bands, thanks to their original designs executed in STMicroelectronics technology
Abboud, Ahmad. "Interference mitigation in 5G mobile networks : Uplink pilot contamination in TDD massive MIMO scheme." Thesis, Limoges, 2017. http://www.theses.fr/2017LIMO0040/document.
Full textBy the revolution of Cloud Computing and Smartphones, an enormous amount of data should traverse the network every second where most of this data are delivered by mobiles using internet services. The fast growth in bandwidth and QoS demands makes the 4th G mobile networks insufficient. The next generation system must afford a sum rate from 100Mbps up to 1Gbps per User Terminal (UT), with a connection density that exceeds 1M connection/Km2, the mobility of high-speed vehicles up to 500 km/hr and an End to End (E2E) delay less than 10ms. A promising candidate that can offer those demands is the Multi-User Multi-Cell Massive Multiple-Input Multiple-Output (MIMO) wireless system. However, Massive MIMO capacity is upper bounded by the Inter-cell Interference (ICI) due to pilot reuse and thus, pilot contamination. In this thesis, we investigate the uplink pilot contamination in Time Division Duplexing (TDD) training scheme of massive MIMO wireless networks. Assuming block-fading channel, the coherence interval will lag for a limited duration, where channel estimation, symbol reception, and symbol precoding must be done within the same interval. Having said that, the training pilot length is limited. Likewise, the number of User Terminal’s (UT’s) per interference region is also limited. Inspired by the variation of coherence interval size among UT’s, this research introduces two independent novel contributions to deal with uplink pilot contamination in massive MIMO. The first contribution maps the Base Station (BS) cell coverage region into a Channel State Information (CSI) Map. This map is created and updated using a special machine-learning algorithm, and it is exploited to predict UT CSI instead of estimating their channels. In view of this, training overhead and uplink pilots are reduced significantly. The second contribution classifies UT’s based on the size of their channel coherence interval. Furthermore, we apply a pilot shifting technique to shift similar pilots to different time position (that considered empty due to empty pilot TDD frames). Simulation results show a scaled increase in the performance of massive MIMO especially in the performance of energy and spectral efficiency, UT per cell and sum-rate. In particular, the third contribution evolves multi-cell massive MIMO to a single cell performance and even overcome single conventional huge in the energy efficiency and UT per cell
Rundström, Per. "Thermal Properties of a 5G Telecom Equipment Casing Design for Noise Suppression." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-299742.
Full textRunt om i världen pågår implementeringen av 5G-mobilnätet. Med den senaste generationens mobila dataöverföring kommer många nya fördelar jämfört med tidigare generationer. En nackdel är däremot den kortare räckvidden hos signalen på grund av den högre frekvens som sänds ut av radion. Ett sätt att kringgå detta är att placera mindre radior närmare där användaren befinner sig. Detta examensarbete utgår från en sådan radio och eftersom den kyls med fläktar och ska placeras nära där människor bor och vistas är det fördelaktigt att kunna sänka ljudet som når omgivningen. Därför har ett ljudisolerande hölje utvecklats med plats för tre telekomradior med syfte att sänka den totala A-vägda ljudeffektnivån som når dess omgivning. För att åstadkomma detta användes kanaler i kombination med mikroperforerade plåtar (MPPs) tillsammans som ett ljuddämpande element. Som ett verktyg i designprocessen och för att säkerställa att radions komponenter inte blev för varma gjordes en CFD-simulering. Resultatet av simuleringen verifierades även med ett experiment där temperaturen hos radions kylflänsar mättes under olika fläktvarvtal. När den totala A-vägda ljudeffektnivån mättes för höljet tillsammans med tre radior uppstod en sänkning med mellan 11,6 dB(A) och 14,2 dB(A) beroende på aktuellt fläktvarvtal. Resultatet från experimentet visade även att temperaturen på radions kylfläns höjdes med mellan 2,8 och 5,9 °C beroende på fläktvarvtal, med mindre skillnad för högre fläktvarvtal vid jämförelse med radions temperatur vid drift utan hölje. Resultaten anses visa på den goda potentialen av att använda höljen utrustade med mikroperforerade plåtar för att minska överfört ljud från telekomradior.
Saad, Haea. "Enhanced Channel Estimation for MIMO-OFDM in 5G NR : or an analysis of the channel estimation performance." Thesis, Karlstads universitet, Institutionen för matematik och datavetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-85070.
Full textMenghes, Robel, and Norouzi Dian Tokhmpash. "Digitalisering inom industriell produktion - Utmaningar och möjligheter med 5G i tillverkande industrier." Thesis, KTH, Hållbar produktionsutveckling (ML), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254558.
Full textDigitalization has gained increased attention in society as well as in various industries as a consequence of the development of new technology that drives growth ahead. Today’s technology has an impact in people’s everyday life and will also affect corporations that operate in all sorts of industries, but especially the manufacturing industry whose industry is undergoing a digital transformation called Industry 4.0. This paper investigates the challenges and opportunities that exist with the introduction and implementation of 5G technologies in manufacturing industries. The method in this study is a qualitative study where four interviews have been held with two companies form the user side, Scania and AstraZeneca,and two companies from the development side, Ericsson and H&D Wireless. In addition to this, a literature search was made to develop a theoretical foundation as well as an observation at Scania Smart Factory Lab to examine the development environment and to see the potential use of the technology. The results from the qualitative study and the literature search showed that there is an opportunity of a more stable availability with cellular technology. It is expected to deliver a high and even level, and is thus more reliable compared to Wi-Fi, which can have high peaks and low bottoms. Furthermore, there is the possibility of a better data flow in form of higher speed as well as a larger amount of data that can be handled. For the RTLS application that H&D Wireless has developed, there is a possibility of improved precision location with 5G. The interviewees see similar challenges when it comes to development and implementation, including the adaption of equipment and tools, a knowledge gap between developers and users, and the development of a 5G standard. The results show that companies that develop services and applications are far ahead in the value chain and are dependent on the users investments in the technology and infrastructure, while these are not involved in constructing the 5G standard. In addition, improved availability means that the technology has great use in monitoring equipment and critical processes, but may be competing with new versions of Wi-Fi if the technology acquires performance improvements.
Alyas, Lailee. "Kundkrav för service av mobilnät i stora industrier." Thesis, KTH, Hållbar produktionsutveckling (ML), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297916.
Full textThe conducted project within the program of Industrial Technology and Production Maintenance concerns the industrial customer requirements for service of mobile networks within large industries. The large industrial customers, such as Scania and Boliden, have an immense focus on supporting the maintenance processes and managing production with the help of automation and digitalization within their companies. Today, the new mobile network of 5G, is a sought-after technology within large industries with large production facilities, that enables the opportunity to connect physical components and thereby increasing the efficiency within the operations. In this thesis work, interviews have been conducted with three Swedish companies, Ericsson, Scania, and Boliden. This is where the requirements of implementation and usage of 5G network have been determined. Moreover, a literature study has also been carried out with the requirement of selecting information that emphasizes on 5G and implementation within large production facilities. The objective of this thesis work is to identify the requirements of large industrial customers, such as their needs for self-maintenance, their requirements on the network operator during implementation and usage of 5G. Finally, the objective is to also present a Service Level Agreement or SLA. The result from the interview and the literature study shows that the customer requirements on the network operator are higher than the requirements the network operator has on thecustomers. During the implementation of 5G, industrial customers must adapt and change their production facilities, which requires new equipment, technology, and competent workers. These aspects should be considered by the and handled by the network operator. Industrial customers also have the condition of handling certain areas of the 5G network themselves, for example having technicians ready that can conduct simple maintenance. This in turn will enable more secure and efficient network and on the same time, at a lesser cost, due to the network operator no longer must conduct simple maintenance. Furthermore, a proposition for a Service Level Agreement have been composed, where the requirements from the industrial customers were documented.
Lundberg, Oscar. "Channel Characteristics Variations from Switching Between Narrow Beams." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-65628.
Full textSaha, Sumit. "RF Front-End Design for X Band using 0.15µm GaN HEMT Technology." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34622.
Full textÅkesson, Emma. "Information visualization of network parameters in private cellular network solutions." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280858.
Full textInom de kommande åren förväntas industriföretag genomgå en stor transformation, i samband med att sakernas internet (engelskans Internet of Things, IoT) når utbredd användning. En viktig möjliggörare bakom denna transformation, känd som Industri 4.0, är den 5:e generationens mobilnät (5G). Genom privatägda mobilnät kommer företag att kunna använda 5G teknologin till att skräddarsy sina nätverk för att tillgodose de egna behoven gällande säkerhet, tillförlitlighet och kvalitet. Trots att mycket av 5G teknologin redan är på plats, har få ansträngningar gjorts för att hjälpa företag förstå och optimera värdet som denna nya lösning medför. Ett sätt som kan göra 5G mer lättförståeligt är genom informationsvisualisering av dess data. Dashboards är idag det mest använda verktyget för att bearbeta data i organisationer. Denna studie ämnade därför att undersöka fördelarna och nackdelarna med informationsvisualisering av data från ett privat 5G-nät i ett sådant verktyg. Ett stort antal kommersiella dashboards för nätverksprestationshantering granskades i förhållande till forskning inom området för effektiv design av dashboards, och en prototyp utvecklades och utvärderades med sju experter inom användarupplevelse. Resultaten från expertgranskningen tyder på att användningen av informationsvisualisering klart hjälpte i kommunikationen av de fem visualiserade nätverksparametrarna: genomströmning, svarstid, tillgänglighet, täckning och uppkopplade enheter. Däremot krävs ytterligare forskning kring verktygets roll i industriell kontext för att kunna göra en fullständig granskning av verktygets användbarhet.
Cayron, Audrey. "Intégration de dispositifs passifs 3D compacts et performants.Application à la réalisation d’une matrice de Butler 4×4 en bande Ka." Thesis, Toulouse, INSA, 2020. http://www.theses.fr/2020ISAT0006.
Full textThe complexity of embedded RF systems in consumer wireless applications is increasing, and requires to improve the integration of RF and microwave passive circuits. New solutions that offer more compactness and performance have to be developed, while maintaining a low manufacturing cost. Among Integrated Passive Devices (IPD) technologies, a 3-D technology has been developed at the LAAS CNRS and by 3DiS Technologies for several years. Results demonstrate that the manufactured solenoids exhibit high compactness and high-performance. This PhD thesis aims to develop the integration process of capacitors in order to evolve the technology towards the fabrication of complex passive RF functions.The manuscript is divided into three chapters. The first chapter reviews the technological processes that enable the manufacture of RF systems and highlights the challenges for integrating high-performance passive components. It also presents the advantages of a low-cost 3-D integration solution such as the one proposed. In the second chapter, we present the development of Metal Insulator Metal (MIM) capacitors. The characterization result show that capacitors present performances equivalent to those identified in the literature with high quality factors. We then manufacture two transformers matched to 50 ohms using capacitors. The technological process is described. The manufactured and measured circuits show that transmission losses are close to those obtained at the maximum available gain of the transformers. These results confirm the good performance of the developed capacitors since they introduce minimal losses for the manufactured circuits. No technological problems are encountered during the manufacturing of the two transformers, which validates the complete technological process for the integration of capacitors and solenoid.Based on these results, we present in the last chapter the development of a 4×4 Butler matrix dedicated to 5G beamforming applications. In a large bandwidth ranging from 24 GHz to 29 GHz, insertion losses for the four outputs of the matrix are under 3.5 dB and the phase difference between the outputs are reached with a deviation of less than 16°. The measured results are at the state of the art and overcome those of the existing IPD solutions, in particular for the occupied aera that does not exceed 0.84 mm2. These performances allow us to conclude on the potential of 3-D IPD technology to achieve an excellent compromise between integration density and performance
Foglia, Manzillo Francesco. "Wideband and flat multibeam antenna solutions for ultrafast communications in millimeter band." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S110/document.
Full textThe ever-growing demand for fast and seamless connectivity shows the need of new wireless standards and technologies. Novel broadband, wide-angle scanning antennas achieving an optimal trade-off among size, gain, efficiency and costs are crucial to the development of emerging applications at millimeter waves, such as fifth-generation (5G) mobile networks and satellite communications. In this thesis, multibeam parallel-fed continuous transverse stub (CTS) array antennas are proposed as possible candidates for future mm-wave communications and are developed to tackle these requirements. The antenna architecture comprises an array of long slots, a corporate feed network based on parallel plate waveguides (PPWs) and an integrated quasi-optical beamformer. First, novel numerical models for the analysis of each subsystem and of the overall antenna, are presented, which enable an efficient and modular design of CTS antennas. These tools are exploited to derive design guidelines and assess the scanning performance. Then, novel design and technological solutions for the integration of CTS antennas in flat, low-profile multilayer modules are discussed. The design and characterization of two prototypes in LTCC technology, for 60-GHz mobile access points are presented: a fixed beam array and a switched-beam antenna with a field of view of ±40°, low SLLs and high beam overlap. Finally, planar linear-to-circular polarization converters are proposed to realize circularly polarized CTS antenna systems. A procedure to achieve an ultra-wideband, low-loss polarization conversion is outlined and a design for Ka-band satellite application is presented
Liu, Jin. "Business models based on IoT, AI and blockchain." Thesis, Uppsala universitet, Industriell teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-360052.
Full textYrjölä, S. (Seppo). "Analysis of technology and business antecedents for spectrum sharing in mobile broadband networks." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526214993.
Full textTiivistelmä Jakamistalous on yksi suurista tulevaisuuden liiketoimintamahdollisuuksiin vaikuttavista trendeistä, eikä langaton tietoliikenne ole tässä poikkeus. Tulevaisuuden laajakaistaiset matkapuhelinverkot tulevat hyödyntämään erityyppisiä radiotaajuuksia, kuten jaettuja taajuuskaistoja, mikä vaatii muutoksia verkkojen toimintoihin ja hallintaan. Eri toimijoiden arvonluonti- ja ansaintamahdollisuuksien odotetaan muuttuvan näissä liikkuvan laajakaistan ekosysteemeissä regulaation, teknologian ja liiketoimintaympäristön kehittyessä, ei vain taajuuksien jakamisessa, vaan myös kun kyseessä on muiden resurssien kuten infrastruktuurin, teknologioiden tai tiedon jakaminen. Väitöskirja tutkii teknologia- ja liiketoimintaedellytyksiä taajuusjakomenetelmille matkapuhelinverkoissa, sekä esittelee ja analysoi menetelmien mahdollistamia liiketoimintamalleja ja strategisia valintoja. Strategia- ja liiketoiminta-analyyseissä käytettiin toimintatutkimus- ja skenaariomenetelmiä poikkitieteellisissä tutkimusprojekteissa yhteistyössä reguloinnin, liiketoiminnan ja tekniikan tutkimusyhteisöjen kanssa. Tutkimus esittelee uuden lähestymistavan taajuusjakotekniikoiden liiketoimintamallien skaalautuvuuden analysointiin jakamistalouden määritelmiä hyödyntäen. Tulokset osoittavat, että kaikki tutkitut tekniikat täyttävät perusedellytykset skaalautuvuudelle; Licensed Shared Access (LSA) hyödyntäen matkapuhelinoperaattorin olemassa olevia resursseja ja kyvykkyyksiä, Citizens Broadband Radio Service (CBRS) laajentaen liiketoimintamalleja tietoliikenteestä sisältöön, kontekstiin ja kaupankäyntialustoihin, sekä digitaalitelevision ja langattoman LTE-tekniikan hybridikäyttö UHF-taajuuskaistalla (HUHF) mahdollistaen uusia liiketoimintamahdollisuuksia lähentyvien tietoliikenne-, Internet- ja mediaekosysteemien välillä. Väitöskirja tulokset vahvistivat taajuuden jakamisen soveltuvuuden liikkuvan laajakaistaverkon ja saman taajuusalueen eri teollisuudenalan haltijan välillä suomalaisessa CORE kenttätestausympäristössä, ja laajensivat taajuusjakotekniikan sovellettavuutta myös muihin langattomiin järjestelmiin sisältö- ja mediajakelussa. Esitettyjä tuloksia voidaan hyödyntää tulevaisuuden langattomien laajakaistaverkkojen kehitystyössä vastaamaan ihmisten ja koneiden kasvaviin tietoliikennepalveluiden ja -kapasiteetin tarpeisiin hyödyntäen tehokkaita taajuusjakotekniikoita ja niiden mahdollistamia innovatiivisia liiketoimintamalleja
Suárez, Trujillo Luis Carlos. "Securing network slices in 5th generation mobile networks." Thesis, Brest, 2020. http://www.theses.fr/2020BRES0050.
Full textNetwork slicing is a cornerstone in the conception and deployment of enriched communication services for the new use cases envisioned and supported by the new 5G architecture.This document makes emphasis on the challenge of the network slicing isolation and security management according to policy. First, a novel access control model was created, that secures the interactions between network functions that reside inside the 5G system. Then, the management of the interactions between network slices was addressed. We coin the concept of network slice chains, which are conceived after security constraint validation according to policy. Lastly, a method to quantify isolation was developed, permitting to find out how well isolated a communication service is, which is offered via network slices. This enables network operators and customers to measure the isolation level and improve the configuration of the network slices so the isolation level can be enhanced. These components establish a solid framework that contributes to secure, vertically, the communication services of a 5G network and assess how secure they are with respect to their interactions and isolation
Sobehy, Abdallah. "Machine learning based localization in 5G." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAS012.
Full textLocalization is the process of determining the position of an entity in a local or global coordinate system. The applications of localization are widely spread across different contexts. For instance, in events, tracking the participants can save lives during crises. In health-care, elderly people can be tracked to respond to their needs in critical situations like falling. In warehouses, robots transferring products from one place to another require accurate knowledge of products' positions as well as other robots. In industrial context of the factory of the future, localization is invaluable to achieve automated processes that are flexible enough to be reconfigured for various purposes. Localization is considered a topic of high interest both in the academia and industry especially with the advent of 5G. The requirements of 5G pave the way for revolutionizing localization capabilities; Enhanced Mobile Broadband (eMBB) that is expected to reach 10 Gbits/s, Ultra-Reliable Low-Latency Communication (URLLC) which is less than 1 ms and massive Machine-Type Communication (mMTC) allowing to connect around 1 million devices per km.In this work, we focus on two main types of localization; range-based localization and fingerprinting based localization. In range-based localization, a network of devices with a maximum communication range estimate inter-distance values to their first-hop neighbors. These distances along with knowledge of positions of few anchor nodes are used to localize other nodes in the network using a triangulation based solution. The proposed method is capable of localizing ≈ 90% of nodes in a network with an average degree of ≈ 10.In the second contribution, wireless channel responses, aka. Channel State Information (CSI) is used to estimate the position of a transmitter communicating with a MIMO antenna. In this work, we apply classical learning techniques (K-nearest neighbors) and deep learning techniques (Multi-Layer Perceptron Neural Network and Convolutional Neural Networks) to localize a transmitter in indoor and outdoor contexts. Our work achieved the first place in the indoor positioning competition prepared by IEEE's Communication Theory Workshop among 8 teams from highly reputable universities worldwide by achieving a Mean Square Error of 2.3 cm
Caldwell, Sean W. "On Traffic Analysis of 4G/LTE Traffic." Cleveland State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=csu1632179249187618.
Full textGopala, Kalyana. "Multiple Antenna Communications for 5G." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS352.
Full textTime Division Duplexing (TDD) Massive Multiple Input Multiple Output (MaMIMO) with a massive number of base station (BS) antennas relies on channel reciprocity to obtain Channel State Information at Transmitter (CSIT). However the overall end to end digital channel is not reciprocal due to the presence of Transmit (Tx) and Receive (Rx) chains which need to be corrected using calibration factors. Our work provides a simple and elegant expression of the Cramer Rao Bound (CRB) for calibration parameter estimation. We provide analysis for the existing least squares approaches and propose optimal algorithms to estimate the calibration parameters. We also consider beamforming for a rapidly time-varying point to point MIMO link. In an Orthogonal Frequency Division Multiplexing (OFDM) sytem, this results in inter-carrier interference (ICI). With an assumption of linear channel variation across the OFDM symbol, it is observed that the beamformer design problem is similar to that of a MIMO Interfering Broadcast Channel (IBC) beamforming design. The beamformer design takes into account receive windowing using the excess cyclic prefix and the window is jointly designed with the Tx beamformer. In addition to full CSIT, we also investigate partial CSIT approaches that maximize Expected Weighted Sum Rate (EWSR) where the Tx has only partial knowledge of the channel. First, we use a large system approximation that also works well for a small number of Tx and Rx antennas to derive the beamformers. In our work, we also analyze the possibility of using the Expected-signal- expected-interference-WSR metric instead of the EWSR. Finally, experimental results on the Eurecom MaMIMO testbed are presented
Dehghani, Kodnoeih Mohammad Reza. "Développement de nouvelle génération d'antenne 5G dans la bande millimétrique." Thesis, Nantes, 2018. http://www.theses.fr/2018NANT4075/document.
Full textLow-profile, low cost, high gain and beam steerable are four of the key features required for 5G point-to-point antennas at millimeter waves. Millimeter-wave bands gained a lot of attention recently as they are capable to provide high data rate communication (up to 10 Gbps) due to their large bandwidth (up to 20%). In the recent years, different antenna technologies have been proposed for such applications, with their advantages and weaknesses. They are either costly solutions, such as directly fed antennas arrays (horn arrays, slot arrays, etc.), or bulky ones such as quasi-optical antenna solution (lenses, transmit-arrays and reflect-arrays). In this thesis, a compact, low cost and high gain antenna based on quasi-optical solutions is proposed in V-band (57-66 GHz). At first an optimized fixed beam antenna solution with reduced focal distance is designed and validated by outdoor measurements. Afterwards, the compatibility of this antenna solution for electronic beam steering is studied, and two beam steering solutions are proposed. These solutions are characterized by both simulations and measurements. Finally, perspective solutions to integrate properties such as dual-frequency and dual-polarization into the antenna solution are proposed
Mohsen, Ali. "Harmonic feedback multi-oscillator for 5G application." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0335/document.
Full textThe PhD project is about harmonic oscillator; the oscillator depends on the fundamental frequency signal at 25 GHz which is amplified using an LNA and power amplifier in order to generate third harmonic signal at 75 GHz at the output, and feedback the fundamental signal to ensure the continuity of the oscillation. A diplexer is used to separate between both frequencies at the output stage, taking in consideration the improvement of the output power, phase noise, and the power added efficiency PAE at the candidate frequency of 5G application. The transistor technology chosen is the 28nm FDSOI from the STMicroelectronics
Aklamanu, Fred Kwasi Mawufemor. "Intent-based networking for 5G mobile networks." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAS013.
Full textMobile networks currently provide an imperative approach to network service provisioning and service life-cycle management. With the rapid technology disruptions, there is a wave that brings onboard millions of users, huge data bulks, and more complex network infrastructures which an imperative management approach will not scale up with the expected increase in demand. Software-Defined Networking (SDN) and Network Function Virtualization (NFV) pave the way for programmability, flexibility, and scalability of mobile networks. Both technologies offer significant advantages to the Network Operators (NOs) in terms of network management and service provisioning, which widens their market to 3rd party providers such as Virtual Network Operators (VNOs) and Over-The-Top (OTT) Application Providers. However, these technologies still rely on imperative approaches to manage and provision network services. A declarative approach to network and service management is essential to handle the growth of networks seamlessly, which an Intent-based networking (IBN) approach provides. IBN consists of organizing and abstracting sets of complex network management and configuration instructions so as to expose them to network tenants in the form of a simple and unambiguous service request called Intent. Intents involve the expression of WHAT while the network handles the HOW. This thesis proposes an Intent-based networking framework for vertical markets with the aim to speed up and simplify the task of network service provisioning and management. The thesis focuses on provisioning 5G network slices using a declarative approach, Intents. The framework aids both operators and network tenants to express their Intent in a high-level language which is close to human language, based on the 4th generation language approach and language transformation (source-to-source) tools. The Intent-Based Networking framework is responsible for the end-to-end deployment of 5G network application slices by staging through different service execution phases including, service configuration, resource allocation, identifying optimal service placement strategy and service lifecycle monitoring without human intervention after Intent expression
Moret, Boris. "Amplificateur de puissance autonome pour applications OFDM et beamforming de la 5G aux fréquences millimétriques en technologie CMOS avancée." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0672/document.
Full textIn order to meet the growing demand for more connected objects and higher data rates,the fifth generation of mobile network (5G) will be deployed. To address thesechallenges, the 5G will use beamforming to improve the transmission quality and extendthe network coverage. Due to the lack of available RF spectrum below 6 GHz, the mobileindustry is studying millimeter wave frequency bands in particular around 28 GHz. Theuse of CMOS technology for 5G applications is promising for the 5G mass market,especially nowadays the miniaturization of CMOS transistors allows competitiveoperation at millimeter frequencies. To meet all the expectations of the 5G especially interms of reliability, new breakthrough ideas, with the self-healing and the selfcontained,allow to use all the benefits of CMOS technology to the maximum whileoffering reliable operation for the amplifier. Within the framework of self-healing andself-contained, several circuits are integrated on silicon such as an amplifier integratedwith a totally non-invasive power detector for self-healing and a balanced self-containedamplifier
Chang, Chia-Yu. "Cloudification and Slicing in 5G Radio Access Network." Electronic Thesis or Diss., Sorbonne université, 2018. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2018SORUS293.pdf.
Full textOver the past few decades, the continuing growth of network statistics requires a constantly evolving technology. Therefore, a natural question arises in our minds: what will 5G be? To answer this question, the 5G architecture must be designed with a certain level of flexibility through the integration of softwarization and virtualization principles. Therefore, we can see that 5G will provide a paradigm shift beyond radio access technology in order to establish an agile and sophisticated communication system. The network can be used efficiently and independently by creating multiple logically separated spaces, called network slices. In addition, each logical network can deploy its network functions in a flexible cloud environment. To this end, the goal of this thesis is to study these two techniques: (a) Cloud-RAN and (b) RAN splitting. In the first part, our focus is on the C-RAN concept, in which monolithic base stations are replaced by (1) distributed radio elements and (2) centralized pools for baseband processing units. The C-RAN notion is still confronted with stringent capacity and latency requirements of the fronthaul interface that connects the distributed remote radio unit to the centralized baseband processing unit. In the second part, we focus on RAN cutting not only to allow different levels of isolation and sharing at each slice of network, but also to customize the control plane, user plane and control logic. Therefore, we provide a flexible runtime environment for the "RAN Runtime" slicing system to host service instances on each of the underlying RAN modules
Saffar, Illyyne. "Machine learning to infer user behavior in 5G autonomic networks." Thesis, Rennes 1, 2020. http://www.theses.fr/2020REN1S039.
Full textThe main idea of this thesis is to use machine learning/deep learning techniques to estimate and predict user behavior by analyzing 3GPP radio signals. The user behavior is defined in terms of habits and preferences while consuming 5G services. The estimation of user behavior is complex and remains a challenge due to its multidimensional nature. We therefore studied an innovative approach for the user behavior estimation: we use a unified system which jointly as well as parallelly estimates each dimension of behavior. Using methods based on supervised and hybrid / semi-supervised deep-learning, we propose a solution for the detection of the user environment (from Indoor/ Outdoor Detection (IOD) to up to 8 classes). We then propose a solution to detect the mobility categories (Mobility Speed Profile (MSP) Detection) up to 8 speed profiles. Finally, an innovative solution jointly estimates both the environment and the mobility profile using deep learning algorithms and a multitasking architecture. The comparison with the state of the art shows the effectiveness of the proposed methods. This allows to consider its deployment by operators in future
Behrad, Shanay. "Slice specific authentication and access control for 5G." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAS007.
Full textThe fifth generation of mobile cellular networks, 5G, is designed to support a set of new use cases and requirements, e.g. concerning quality of service or security. Using the virtualization technologies and the concept of network slicing, the 5G network operators will be able to provide specific connectivity capabilities in order to support these various use cases. Each network slice can be dedicated to a 3rd party (i.e., any business actor that is not the network operator), and be designed to fit its requirements.However, although network slices can be designed by enabling or disabling certain network functions, the Authentication and Access Control (AAC) mechanisms remain the same for all slices, with tightly coupled network components.This thesis proposes 5G-SSAAC (5G Slice-Specific AAC), as an initial step to introduce a more loosely coupled design into the whole 5G network architecture. 5G-SSAAC enables 5G networks to provide various AAC mechanisms to the 3rd parties according to their security requirements. To assess this innovative mechanism, the thesis analyses the consequences of using the 5G-SSAAC on the security of the whole 5G system. The feasibility of the 5G-SSAAC is also presented with the implementation of a fully virtualized mobile network through an OAI (Open Air Interface) based testbed. This work finally evaluates the impact of 5G-SSAAC mechanism on the network load considering the anticipated number of AAC signalling messages compared to the existing AAC mechanisms in cellular networks
Zaki, Hindi Ayat. "Transport of critical services over unlicensed spectrum in 5G networks." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAS022.
Full textThis thesis studies the transport of critical services in 5G networks, where unlicensed spectrum is advocated to minimize the cost and to cope with the high demand for frequency resources. We first evaluate the performance of Ultra-Reliable Low-Latency Communication (URLLC) which has stringent requirements on reliability and delay, on the order of 99.999% and 1 ms, respectively, transported in unlicensed spectrum. We propose a model based on a Markov chain to quantify the reliability within a delay constraint under Listen-Before-Talk (LBT) medium access procedure, then we deduce the maximum number of stations that can be handled at the same time, while respecting URLLC constraints. This analysis is then used to investigate novel methods for the joint transmission of URLLC over unlicensed and licensed spectrum. We propose three methods for the joint access to available resources, and demonstrate that the optimal method to access the resources is by using licensed ones only when unlicensed transmission fails within a given time budget. This method is then studied in the case of multiple tenants in proximity competing over the same unlicensed channel. If all tenants try to maximize their usage of unlicensed resources then everyone will end up in a tragedy of the commons type of situation. We show that at least one equilibrium point exists for this system which minimizes the cost for all tenants. We study later the coexistence of URLLC with other 5G services, such as enhanced Mobile Broadband (eMBB), in unlicensed spectrum. eMBB has large packets and its multiplexing with URLLC may entail a large degradation in URLLC performance. For that, we propose a new technique to prioritize URLLC packets by transmitting them with higher power. However, high power transmission is not systematically performed to reduce the interference on other users and also to reduce the energy consumption, which is very important for battery-powered devices. In this case, two methods were proposed to transmit with high power, leaving it as a last resort. One is LBT-agnostic and transmits whenever the packet delay approaches time-out, while the other respects LBT and uses high power only when transmission opportunities occur beyond a time threshold. We then propose a decentralized implementation of the time-threshold approach. We formulate the problem as an optimization problem where transmitters are to choose the optimal policy (time threshold) which minimizes the energy consumption while preserving URLLC requirements. We then solve the optimization problem using a learning approach and show a slow convergence to the optimal policy due to the fact that losses are rare events. To remedy to this, we employ the optimization framework and the prior knowledge of the system to accelerate this learning. We finally study the decentralized approach for a different type of critical services which focuses on the freshness of the information, known as the Age of Information (AoI). In this context, instead of guaranteeing a reliability target within a delay, the packet must be delivered as soon as it is generated, or else it loses its value. We demonstrate that optimal policies in the AoI context tend to start aggressively, and reduce the transmission power when the age of the packet increases
Pham, Tuyen. "Advanced reconfigurable antennas for 5G heterogeneous networks at millimeter waves." Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S120.
Full textLow-profile, low cost, high gain and beam-steering capability over a large total field of view are among preferred features of antenna arrays for 5G channel sounding at millimeter waves. The latter are extremely attractive for high-speed communications due to the large available bandwidth. In the recent years, various potential antenna technologies have been investigated for multiple beam applications in terms of gain, efficiency, beam-steering performance, form factor and cost, such as antenna arrays or quasi-optical systems (lenses, reflectors, etc.). Space-fed architectures are very attaractive for their high radiation efficiency. In this thesis, transmitarray antennas (TAs) with low profile, low cost, high gain and wide field of view with low scan loss have been proposed in V-band (57-64 GHz). A monofocal TA with fixed beam (pointing at broadside or in an offset direction) has been first studied. To circumvent its limitation in scanning, bifocal and quadri-focal TAs have been proposed. These solutions have characterized in detail both in simulations and measurements. Finally, a triple-band TA operating at Ka band (up-link and down-link) and V-band has been also developped based on interleaving technique
Bulusu, Sri Satish Krishna Chaitanya. "Performance Analysis and PAPR Reduction Techniques for Filter-Bank based Multi-Carrier Systems with Non-Linear Power Amplifiers." Thesis, Paris, CNAM, 2016. http://www.theses.fr/2016CNAM1042/document.
Full textThis thesis is part of the European FP7 EMPHATIC project (Enhanced Multicarrier Techniques for Professional Ad-Hoc and Cell-Based Communications) including various European universities and two main industrial partners: THALES Communications Security and CASSIDIAN. The EMPHATIC objective is to develop, evaluate and demonstrate the capability of enhanced multi-carrier techniques to make better use of the existing radio frequency bands in providing broadband data services in coexistence with narrowband legacy services. The project addresses the Professional Mobile Radio (PMR) application. The main idea is to analyze the viability of broadband systems based on filter-bank multi-carrier (FBMC) clubbed with o ffset quadrature amplitude modulation (OQAM) in the context of the future 5th Generation (5G) radio access technology (RAT). Increasingly, the FBMC-OQAM systems are gaining appeal in the probe for advanced multi-carrier modulation (MCM) waveforms for future communication systems. This advanced modulation scheme o ers numerous advantages such as excellent frequency localization in its power spectral density (PSD), a robustness to phase noise, frequency off sets and also to the multi-user asynchronism; making it more appealing than OFDM for PMR, cognitive radio (CR) and 5G RAT. However, like any other MCM technique, FBMC-OQAM suff ers from high PAPR. When the power amplifi er (PA) non-linearity, which is realistic radio-frequency impairment, is taken into account; the good frequency localization property is severely compromised, due to the spectral regrowth. The first objective of this PhD thesis is, to predict the extent of the spectral regrowth in FBMC-OQAM systems, due to the PA non-linearity. The second objective is to probe techniques for FBMC-OQAM systems, such as PAPR reduction and PA linearization, in order to mitigate the NL eff ects of PA. By cumulant analysis, spectral regrowth prediction has been done for FBMC-OQAM systems. Also, some algorithms for PAPR reduction, which are based on probabilistic approach and adding signal methods, have been proposed. The coexistence capability of the FBMC-OQAM based broadband system with the narrowband PMR systems in the presence of PA has been analyzed and it has been found that coexistence is possible, provided there is a symbiotic combination of PA Input Back-off (IBO), PAPR reduction and PA linearization. Finally, a novel PA linearization technique has been proposed for FBMC-OQAM
Salah, Adham M. S. "Investigation of Integrated Decoupling Methods for MIMO Antenna Systems. Design, Modelling and Implementation of MIMO Antenna Systems for Different Spectrum Applications with High Port-to-Port Isolation Using Different Decoupling Techniques." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18427.
Full textHigher Committee for Education Development in Iraq (HCED)
Boutigny, François. "Multidomain virtual network embedding under security-oriented requirements applied to 5G network slices." Electronic Thesis or Diss., Institut polytechnique de Paris, 2019. http://www.theses.fr/2019IPPAS002.
Full text5G brings a new concept called network slicing. This technology makes it possible to generalize the business model of MVNOs to companies in need to operate a network, without it being their core business. Each slice is an end-to-end, dedicated and customized virtual network, over a shared infrastructure; this infrastructure itself is provided by the interconnection of infrastructure providers: we refer to this case as a multi-domain infrastructure.The objective of this thesis is to study the allocation of these slices in such a multi-domain infrastructure. The problem is known as Virtual Network Embedding (VNE). It is an NP-hard problem. Practically, the VNE problem looks for which physical resources to associate a set of virtual elements. Physical resources describe what they can offer. Virtual elements describe what they require. Linking these offers and requests is the key to solve the VNE problem.In this thesis, we focused on modeling and implementing security requirements. Indeed, we expect that the initiators of the slices belong to areas distant from telecommunications. In the same way that they know little about this field, we can expect that their needs, especially in security, are novel in the slice context.This thesis presents an algorithm able to handling various requirements, according to an extensible model based on a Satisfiability Modulo Theories (SMT) solver. Compared to Integer Linear Programming (ILP), more common in the VNE field, this formulation allows to express the satisfaction constraints in a more transparent way, and allows to audit all the constraints.Moreover, being aware that infrastructure providers are reluctant to disclose information about their physical resources, we propose a resolution limiting this disclosure. This system has been successfully implemented and tested during the Ph.D
Nassif, Georges. "Modélisation stochastique et physique de la propagation 5G indoor en bandes millimétriques." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAT041.
Full text5G millimeter wave (mmWave) is a promising solution to the spectrum scarcity problem since very large bandwidths are available. However, due to their propagation properties, namely their very short wavelength, this frequency band can severely impact transmission, leading to a new major challenge: indoor coverage. This requires new studies to answer three major questions: What is the impact of the various environment geometries (apartment, factory, etc.) on indoor mmWave propagation? What is the impact of the various environment materials (concrete, plasterboard, etc.) on indoor mmWave propagation? and what planning methods should we use for the various indoor 5G applications (fixed wireless access, industry 4.0, etc.).In this work, we address this challenge through a novel theoretical framework that combines stochastic indoor environment modeling with advanced physical propagation simulation. This approach is particularly adapted to investigate indoor-to-indoor 5G mmWave propagation. Its system implementation, so-called iGeoStat, generates parameterized typical environments that account for the indoor spatial variations, then simulates radio propagation based on the physical interaction between electromagnetic waves and material properties. This framework is not dedicated to a particular environment, material, frequency or use case and aims to statistically understand the influence of indoor environment parameters on mmWave propagation properties, especially coverage, SINR, and path loss.iGeoStat's system implementation raises numerous computational challenges that we solve by formulating an adapted link budget and designing new memory optimization algorithms. The first simulation results for two major 5G applications (fixed wireless access and industry 4.0) are validated with measurement data and show the efficiency of iGeoStat to simulate multiple diffusion in realistic environments, within a reasonable amount of time and memory resources. Generated output maps confirm that diffusion has a critical impact on indoor mmWave propagation and that proper physical modeling is of the utmost importance to generate relevant propagation models.Using iGeoStat, the main propagation parameters are investigated in various scenarios, showing that the complex refractive index of the indoor material has a moderate impact on the received power, while its surface roughness parameter has a major impact and may completely change the power profile in the environment. Various acceleration techniques are also presented in this work where we show through the simulation results that the performance of iGeoStat can be further enhanced and that we can achieve at least 50% reduction in time simulation and memory usage without impacting the physical aspect of propagation
Boutayeb, Mohammed Saad. "Architecture et conception d’un amplificateur de puissance large-bande pour des applications 4G/5G." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALT055.
Full textThe arrival of the 5G NR put more constraints on the transceivers architectures. They must integrate more components (filters, power amplifiers, etc.) in order to address more numerous and wider bands (in particular the “sub-6 GHz” bands) in addition to processing more complex signals. These new space and performance constraints that transceivers must meet have a direct impact on the technical specifications of power amplifiers (PAs). On the one hand it is necessary to have PAs which address wider bands in order to reduce the number of components in the emission chain; on the other hand, these PAs must meet the criteria of linearity of the new standards (LTE-A and 5G NR) while ensuring good operating energy efficiency. The work of this thesis concerns the investigation of advanced PA architectures combining bandwidth, linearity and energy efficiency.The context and the motivations of the thesis stated, the choice of SOI 130nm RF technology and the constraints to which the PA must respond are justified. A study of the state of the art of improved efficiency PAs architectures makes it possible to select Doherty architecture as an interesting solution. A theoretical study of the Doherty architecture is carried out in order to model its operation, to identify the impact of the dimensioning parameters and the parasitic capacitances of the transistor on the performances before exploring the bandwidth perspectives it presents. A first demonstrator circuit was implemented in RF SOI 130nm. It is a Doherty amplifier stage covering the 3.2-3.6 GHz band. For an LTE 10MHz 50RB signal at an output power of 27dBm, a maximum ACLR of -30.5 dBc and a minimum PAE of 36% was measured across the band. A second Doherty circuit integrating a driver stage has been implemented in the same technology. Measurements for an LTE 10MHz 12RB signal at 28 dBm of output power give a maximum ACLR of -35 dBc and a minimum PAE of 32% over the whole band 3.2-3.8 GHz which allows to cover the B42, B43 and B49 bands
Despoisse, Thibaut. "5G 28 GHz high efficiency integrated phased array transceivers." Thesis, Bordeaux, 2020. http://www.theses.fr/2020BORD0151.
Full textThe limitations of the current mobile telecommunication generation (4G) are actually reached. Indeed, the available data rate and the maximum number of users are no longer sufficient. A new generation (5G) is being developed to cope with these needs. It will target different use cases: internet of things, ultra-high data rate communications, and some critical applications such as autonomous vehicles or remote surgery. The needs are much higher than the existing network capabilities. So, innovative solutions have been proposed.In this thesis work, a new sizing methodology has been developed for 5G systems. It is applied to the Ka-band high data rate communication use case. Several architectures which meet the defined specifications have been studied. A methodology has been implemented to compare their performances depending to their power consumption. Thus, the best suitable architecture for the targeted use case is chosen. Finally, an advanced CMOS technology has been chosen and characterized in order to realize parts of the 5G system. RF switches and low noise amplifier operating in the Ka-band have been designed
Labidi, Wael. "Smart grid-aware radio engineering in 5G mobile networks." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLL006/document.
Full textThe energy demand in mobile networks is increasing due to the emergence of new technologies and new services with higher requirements (data rates, delays, etc). In this context, the Mobile Network Operator (MNO) has to provide more radio and processing resources in its network leading for higher financial costs. The MNO has no choice but to implement energy saving strategies in all the parts of its infrastructure and especially at the Radio Access Network (RAN).At the same time, the electrical grid is getting smarter including new functionalities to balance supply and demand by varying the electricity prices, allowing some aggregators to be part of the supply process and signing demand response agreements with its clients. In the context of reliable smart grid, the MNO having thousands of evolved NodeB (eNB) spread over all the country, has to play major role in the grid by acting as a prosumer able to sell electricity. In African Sub-Saharan countries however, the grid may be not reliable or even non existent, the MNO has no choice but to deploy a Virtual Power Plant (VPP) and rely partially or totally on it.In this thesis, we study the interactions between the network operator and the grid either reliable or not in both developed and developing countries. We investigate both long term and short term optimal energy related management, with the aim of minimising the operator's Total Cost of Ownership (TCO) for energy per base station which is the sum of its Capital Expenditure (CAPEX) and Operational Expenditure (OPEX) while satisfying the growing needs of its user traffic in the cell.The long term study enables us to make semestral based investment decisions for the battery and renewable energy sources dimensioning considering equipment performance degradation, predictions on users traffic growth and electricity market evolution over a long period of time counted in years.In the case of being powered by a reliable smart grid, the short term policy helps the operator to set on a daily basis, an optimal battery management strategy by performing electricity arbitrage or trading that takes advantage of the electricity prices hourly fluctuations in order to minimize the MNO daily energy bill while respecting some rules on the usage of its equipments.In the case of a non reliable or off-grid environment, the operator is powered by hybrid sources coupling storage, diesel generators, solar power and the grid if the latter is operational. Here, we define a fixed order of priority on the use of these sources that extends the battery lifetime and maintain its performance