Tesis sobre el tema "Dense radio access network"
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Thainesh, Joseph S. "Radio access network (RAN) signalling architecture for dense mobile network". Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/811126/.
Texto completoJarrar, Majed. "Radio Over Fibre Passive Optical Network Integration for The Smart Grid". Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32779.
Texto completoLim, Christopher. "Optimizing access radio in multi-radio mesh network /". View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CSED%202009%20LIM.
Texto completoTsai, Pi-Kuang. "Indoor hybrid infrared-radio access network". Thesis, University of Cambridge, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614020.
Texto completoLei, Rui. "Cloud Radio Access Network in constrained fronthaul". Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/21293/.
Texto completoChang, 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.
Texto completoOver 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
Montojo, Villasanta Javier y Viñas Manuel Maqueda. "Congestion Identification in a Radio Access Transport Network". Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-142437.
Texto completoTjänstekonvergensen av Internet- och mobila tjänster har medfört en radikal förändring i mobilnäten. En ”All IP” nätverksarkitektur, en utveckling av radios transportnät. Utvecklingen krävs för att stödja de nya bredbandiga tjänsterna. Tyvärr är befintliga kontrollmekanismer otillräckliga för att garantera användarens kvalitetsupplevelse. Med att samordna radio- och transportnätverkets resurser förväntar man sig en effektivare lösning. Detta examensarbete undersöker samspelet mellan protokoll för att undvika överlast, direkt indikation av överlast och trafikal statistik för fördröjning och bandbredd med trafikstyrning baserat på fördröjning och bandbredd , vid användning av Open Shortest Path First ( OSPF - TE ) som routingprotokoll. Med hjälp av information om dessa interaktioner, är det möjligt att identifiera uppkomsten av flaskhalsar och för att styra trafikstockningar i transportförbindelser inom ett radioaccess transportnät. En utökad topologikarta med nätverkets aktuella egenskaper kommer att reagera på en potentiell överbelastning. Ytterligare åtgärder, till exempel överlämningar, vidtas i mobilnätet för att säkerställa användarens upplevda kvalitet. Den föreslagna metoden har validerats i en testmiljö. Resultaten från experiment och mätningar i denna testmiljö ger en tydlig bild av hur trafikflödena framskrider i nätverket. Beteendet hos nätverket som observeras i dessa experiment, i termer av realtidsprestanda och statistisk analys av mätvärden över en tidsperiod, visar effektiviteten av denna föreslagna lösning.
Simard, François. "A packet radio network design for field, mobile multimedia communications, network configuration, radio channel access and network management". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ28459.pdf.
Texto completoJuarez, Maribel. "Structuring Lean Thinking in the Radio Access Network Area". Thesis, Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-110839.
Texto completoAl-Samman, Imad. "The integration of cloud radio access network in 5G". Thesis, University of Bristol, 2018. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752772.
Texto completoAruchamy, Logabharathi. "Analysis of Radio Access Network Buffer Filling Based on Real Network Data". Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-6063.
Texto completoLyazidi, Mohammed Yazid. "Dynamic resource allocation and network optimization in the Cloud Radio Access Network". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066549/document.
Texto completoCloud Radio Access Network (C-RAN) is a future direction in wireless communications for deploying cellular radio access subsystems in current 4G and next-generation 5G networks. In the C-RAN architecture, BaseBand Units (BBUs) are located in a pool of virtual base stations, which are connected via a high-bandwidth low latency fronthaul network to Radio Remote Heads (RRHs). In comparison to standalone clusters of distributed radio base stations, C-RAN architecture provides significant benefits in terms of centralized resource pooling, network flexibility and cost savings. In this thesis, we address the problem of dynamic resource allocation and power minimization in downlink communications for C-RAN. Our research aims to allocate baseband resources to dynamic flows of mobile users, while properly assigning RRHs to BBUs to accommodate the traffic and network demands. This is a non-linear NP-hard optimization problem, which encompasses many constraints such as mobile users' resources demands, interference management, BBU pool and fronthaul links capacities, as well as maximum transmission power limitation. To overcome the high complexity involved in this problem, we present several approaches for resource allocation strategies and tackle this issue in three stages. Obtained results prove the efficiency of our proposed strategies in terms of throughput satisfaction rate, number of active RRHs, BBU pool processing power, resiliency, and operational budget cost
Milosavljevic, Milos. "Integrated wireless-PON access network architectures". Thesis, University of Hertfordshire, 2011. http://hdl.handle.net/2299/6371.
Texto completoXie, Qing Yan. "Performance Analysis of Opportunistc Spectrum Access on Cognitive Radio". University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1273173530.
Texto completoMach, Tomasz Henryk. "Autonomously controlled terminal mobility in self-organising radio access network". Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659109.
Texto completoJin, Jing. "Traffic Burst Prediction in Radio Access Network with Machine Learning". Thesis, KTH, Skolan för elektro- och systemteknik (EES), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-197206.
Texto completoMotiverad av ökningen i mobil datatrafik, det finns en ökande efterfråganpå bättre fördelning av radioresurser i radioaccessnät (RAN). Nyligenhar intresset förskjutits mot prediktiva resursfördelnings tekniker, som skullemöjliggöra en mer intelligent RAN. En lovande lösning för att utvecklaprediktiva resursfördelning tekniker är att kombinera resurstilldelningsalgoritmermed förutsägelsealgoritmer baserade på maskininlärning (ML). I dettaprojekt studeras förutsägelsen av datatrafik i RAN med ML tekniker, i syfteatt använda prediktorn för bäraraggregering. Trafiken som betraktas i dettaprojekt är på skur nivå som är en sammanslagning av flera på varandraföljande paket, och fokus ligger på övervakade klassificeringsalgoritmer. Detär volymen av skuren, längden, och tidsskillnaden mellan två skurar somförutsägs. Prestandan hos förutsägelse utvärderas med receiver operatingcharacteristic kurvan.
Foukas, Xenofon. "Towards a programmable and virtualized mobile radio access network architecture". Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31406.
Texto completoMohamed, Abdelrahim. "Efficient radio access network with separated control and data functions". Thesis, University of Surrey, 2017. http://epubs.surrey.ac.uk/813133/.
Texto completoDi, Cicco Nicola. "Scalable Algorithms for Cloud Radio Access Network (C-RAN) Optimization". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23755/.
Texto completoRabia, Tarek. "Virtualisation des fonctions d'un Cloud Radio Access Network(C-RAN)". Thesis, Sorbonne université, 2018. http://www.theses.fr/2018SORUS009/document.
Texto completoOver the next five years, the new generation of mobile networks (5G) would face a significant growth of the data volume, exchanged between billions of connected objects and applications. Furthermore, the emergence of new technologies, such as Internet of Things (IoT), autonomous driving and augmented reality, imposes higher performance and quality of service (QoS) requirements. Meeting these requirements, while reducing the Capital and Operation Expenditures (CAPEX/OPEX), are the pursued goals of the mobile operators. Consequently, Telcos define a new radio access architecture, called Cloud Radio Access Network (C-RAN). The C-RAN principle is to centralize, within a pool, the processing unit of a radio interface, named BaseBand Unit (BBU). These two units are interconnected through a Fronthaul (FH) network. In this thesis, we design a new partially centralized C-RAN architecture that integrates a virtualization platform, based on a Xen environment, called Metamorphic Network (MNet). Through this architecture, we aim to: i) implement a pool in which physical resources (processors, memory, network ports, etc.) are shared between virtualized BBUs and other applications; ii) establish an open FH network that can be used by multiple operators, service providers and third parties to deploy their services and Apps closer to the users for a better Quality of Experience (QoE); iii) exploit, through the FH, the existing Ethernet infrastructures to reduce CAPEX/OPEX; and finally iv) provide the recommended network performance for the 5G. In the first contribution, we define a new Xen architecture for the MNet platform integrating the packet-processing framework, OpenDataPlane (ODP), within a privileged Xen domain, called Driver Domain (DD). This new architecture accelerates the data packet processing within MNet, while avoiding the physical CPUs overuse by ODP. Thus, virtual CPU cores (vCPU) are allocated within DD and are used by ODP to accelerate the packet processing. This new Xen architecture improves the MNet platform by 15%. In the second contribution, we implement two network solutions within the FH. The first solution consist of deploying a layer 2 network protocol, Transparent Interconnection of Lots of Links (TRILL), to connect multiple elements of our C-RAN architecture. The second solution consists of implementing a Software Defined Network (SDN) model managed by Open Network Operating System (ONOS), a distributed SDN controller that is which is virtualized within BBU pool. Moreover, a network performance comparison is performed between these two solutions
Abbood, Abdul Nasser Abdul Jabbar. "Optimised radio over fibre links for next generation radio access networks". Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/17019.
Texto completoAlfred, Asterjadhi. "Network Coding for Cognitive Radio Networks". Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3422021.
Texto completoLe Reti Radio Cognitive sono una tecnologia promettente che potrà essere utilizzata in un futuro molto prossimo, come soluzione possibile al problema di spettro limitato riscontrato nelle reti wireless tradizionali. Le recenti innovazioni tecnologiche su Software Defined Radio hanno permesso lo sviluppo di ricetrasmettitori radio sufficientemente flessibili, in grado di modificare dinamicamente i loro parametri di trasmissione, al fine di sfruttare in modo efficiente le risorse radio disponibili. Questa maggiore capacita di auto-adattarsi in risposta alle interazioni con l'ambiente circostante rende le radio cognitive i candidati ideali per l'accesso opportunistico nelle bande dello spettro radio utilizzate dagli utenti primari. Poiché gli utenti primari hanno diritto ad accedere alle proprie risorse dello spettro in qualsiasi momento e luogo, entro i limiti contrattuali imposti dalle autorità di gestione dello spettro radio, le radio cognitive devono effettuare la scansione e identificare le porzioni dello spettro non utilizzate dagli utenti primari. Inoltre, al fine di non interferire con tali utenti, esse devono liberare rapidamente lo spettro radio, ogniqualvolta l'utente primario inizi ad utilizzare la propria banda di frequenze. La coesistenza tra radio cognitive e utenti primari e' un obiettivo molto ambizioso. Inoltre, quando si considera la normale evoluzione delle reti radio cognitive a sistemi più complessi, le sfide e i problemi da affrontare aumentano notevolmente. In particolare, la capacita intrinseca delle radio cognitive di basare le proprie decisioni sulla propria visione locale dello spettro radio rende il loro funzionamento sensibile a molte tipologie di attacco. Quindi, in tale ambiente, meccanismi come la cooperazione, l'apprendimento e la negoziazione sono di aiuto alle radio cognitive nel prendere le decisioni necessarie a garantire le proprie comunicazioni senza interferire con quelle degli utenti primari. In questa tesi si presenta un'architettura innovativa per le Reti Radio Cognitive che utilizza la tecnica di network coding per lo scambio di informazioni di controllo tra i nodi, riguardo lo stato dell'ambiente radio, in modo rapido, coerente e affidabile. Questa informazione viene successivamente utilizzata dalle radio cognitive per eseguire il rilevamento cooperativo degli utenti primari e il riutilizzo efficiente dello spettro a disposizione, garantendo una comunicazione robusta e una reazione tempestiva ai cambiamenti dello stato delle risorse radio.
Khan, Muhammad. "A self-optimised cloud radio access network for emerging 5G architectures". Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16050.
Texto completoYao, Yong. "A Software Framework for Prioritized Spectrum Access in Heterogeneous Cognitive Radio Networks". Doctoral thesis, Blekinge Tekniska Högskola [bth.se], Faculty of Computing - Department of Communication Systems, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00590.
Texto completoMawlawi, Baher. "Random access for dense networks : Design and Analysis of Multiband CSMA/CA". Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0112/document.
Texto completoOpportunistic protocols are promising candidates for future wireless systems dedicated to machine to machine (M2M) communication. Such protocols are usually based on a random access with simple techniques of medium sensing and deferring to reduce collisions while avoiding the use of complex schedulers. Among different protocols, Carrier sense multiple access/collision avoidance with a Request-To-Send/Clear-To-Send (CSMA/CA-RTS/CTS) is an opportunistic protocol which could be adopted for M2M scenarios. Such approach is efficient to avoid collisions between data packets but in a very dense network, the random access used to send the RTS suffers itself from a high probability of collision which degrades the performance. In order to mitigate this effect, RTS collisions should be reduced. This thesis proposes to address this issue by splitting the common channel in sub-channels for transmitting the RTS messages. While the common channel is used as a whole for data transmission. Multiple nodes can then contend in time and frequency for these RTS sub-channels, thereby reducing RTS collisions and increasing overall efficiency. In this work, we thus derive a complete protocol solution relying on CSMA/CA - RTS/CTS multiplexing a multi-channel configuration for RTS messages and a unique channel for data transmission. An enhanced version based on users scheduling is integrated as well. In this thesis, the proposed protocol is investigated from a joint PHY-MAC point of view. This strategy is shown to provide better system performance particularly for loaded networks. An accurate analytical model derived as a straightforward extension of the Bianchi model is analyzed and validated by simulations. Performance in terms of saturation throughput, transmission delay and packet drop probability is discussed
Mulligan, Jeanette. "A Performance Analysis of a CSMA Multihop Packet Radio Network". Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36779.
Texto completoThe analysis of packet radio networks is complex because system performance depends on the topology of the terminals in the network along with the random access protocol used. Researchers have been unable to model a packet radio network in its most general form. In this project, a model is developed for specific topologies of a packet radio network with a given random access protocol.
The sponsor of this project has developed a packet radio network for
an indoor wireless alarm system. At the start of the project, the
effect of message collisions on system performance was unknown. As
a result of this research, a collision model for the network has
been developed for topologies of four, five, and six alarm units.
The model has been validated with actual system testing. Furthermore,
the effects of indoor propagation on system performance have been
studied. The results of this work have led to the development of an
installation plan for the indoor wireless alarm system.
Master of Science
Shi, Lishen. "Coherent optical code division multiple access (CDMA) network employing CW semiconductor lasers". Thesis, University of Strathclyde, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273787.
Texto completoShahzad, Hamid y Nishant Jain. "Internet Protocol based Mobile Radio Access Network Architecture for Remote Service Areas". Thesis, KTH, Kommunikationssystem, CoS, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91940.
Texto completoNär det gäller deras Radio access nät, finns det inte två Mobiloperatörer, som betjänar avlägsna områden, som är lika. Trots olika omständigheter och teknologier, ett väl designat optimerat RAN måste anpassa sig till den existerande nätverks teknologin, både med avseende på äldre befintlig teknologi och på moderna telekomnät, för att kunna skapa bästa möjliga nätverk givet många begränsningar. Det är en missuppfattning i tekniska kretsar att en optimerad IP anpassad RAN arkitektur är mer teoretisk än praktisk. Å andra sidan så är det ovan sagda väldigt beroende på vilken teknologi som har använts. En paket optimerad IP-GSM Radio Access Nätverks (IPGRAN) arkitektur är föreslagen i denna masters uppsats, den baseras på Internet Protokollet (IP) snarare än något egenutvecklat proprietärt protokol för komunikation mellan Basstation (BTS), Basstationscontroller (BSC), och nätets switchade subsystem (NSS). Denna arkitektur måste leverera carrier-grade (operatörs klassad) mobilitet, skalbarhet och tillgänglighet och samtidigt vara optimerat för effektiv roaming, routing och anslutning från avlägsna områden. På ett geografiskt område som sträcker sig runt hela jordklotet är inte klassiska kretskopplade nätverk kostnadseffektiva beroende på deras integrerade signallerings och samtals arkitektur. En bättre arkitektur kan vara en sk “softswitch” lösning som separerar samtalet i en (Media Gateway Controller (MGC)) och signaleringen (Media Gateway (MG)) i separata noder. Denna metod skulle på ett fundamentalt vis ändra det sätt på vilket traditionella kretskopplade tjänster som traditionell telefoni hanteras. För en tjänsteleverantör möjliggör detta ett mycket effektivare nätverk då det möjliggör optimerad utplacering av utrustning för terminering av rösttrafik in i andra operatörers nät. Samlokalisering av media gateways (MG:s) med jordstationer för satellitkommunikation möjliggör lokal anslutning till det allmänna telenätet (PSTN), vilket kraftigt minskar den trafik som behöver transporteras genom operatörens stomnät. Denna mastersuppsats behandlar “softswitching” som en del av metoden att växla och transportera samtalstrafik. Uppsatsen behandlar problemet med att skicka samtalstrafik och signalering från avlägsna områden, effektiv routing och transport av trafiken till den operatör som har den närmaste(alt. mest optimala) anslutningspunkten. Uppsatsen undersöker ett alternativ som använder ett paketförmedlat (IP baserat) transportsätt för att transportera trafiken geografiskt sett så nära den uppringda parten som möjligt innan den termineras i det allmänna telenätet (PSTN) varvid man uppnår optimal växling (alt. routing) av rösttrafik och signalering. I beaktande av ovanstående beskriver uppsatsen en detaljerad nätverksarkitektur och en funktionsduglig systemprototyp för ett maritimt GSM nät som ett utmanande exempel på ett avlägset beläget nät.
Crews, Mark Conrad. "Dynamic sensing and signaling over the packet radio network multiple access channel". Thesis, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/14940.
Texto completoMICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.
Bibliography: leaves 129-130.
by Mark Conrad Crews.
M.S.
Canton, Anne-Florence. "Modélisation et analyse des performances de l'UTRAN : Universal Terrestrial Radio Access Network". Paris, ENST, 2002. http://www.theses.fr/2002ENST0045.
Texto completoTrends in UMTS systems are towards delivering voice, data and video, as well as Web trafic with appropriate end-to-end QoS guarantees as illustrated by the intensive standardization work on a QoS architecture in 3GPP. Key to its implementation is the air interface and its limiting performance to the end-to-end system. In this work, we consider an end-to-end architecture, where in a UMTS system interworks with a wired IP network and focus on two major topics. First, we consider the impact of the air interface on the end-to-end Qos, mainly in terms of reliability. Second, we investigate the feasibility of the implementation of advanced radio functions within the UTRAN. Typically, in wired networks, reliability for data traffic is guaranteed by the use of TCP at the transport layer. The wireless, mobile component adds error and delay to the end-to-end performance. In our work, we quantify the performance of TCP over ARQ, an error detection / retransmission mechanism present at the RLC layer. As of the UTRAN, the challenge is to guarantee low transport delay toboth real-time and non-real-time traffic, as dictated by the advanced radio functions. We particularly study the design and dimensionning of the UTRAN for both voice and data traffic in isolation as well as service differenciation in the case where both co-exist
Canton, Anne-Florence. "Modélisation et analyse des performances de l'UTRAN : universal terrestrial radio access network /". Paris : École nationale supérieure des télécommunications, 2004. http://catalogue.bnf.fr/ark:/12148/cb40011571t.
Texto completoOueis, Jad. "Radio access and core functionalities in self-deployable mobile networks". Thesis, Lyon, 2018. http://www.theses.fr/2018LYSEI095/document.
Texto completoSelf-deployable mobile networks are a novel family of cellular networks, that can be rapidly deployed, easily installed, and operated on demand, anywhere, anytime. They target diverse use cases and provide network services when the classical network fails, is not suitable, or simply does not exist: when the network saturates during crowded events, when first responders need private broadband communication in disaster-relief and mission-critical situations, or when there is no infrastructure in areas with low population density. These networks are challenging a long-standing vision of cellular networks by eliminating the physical separation between the radio access network (RAN) and the core network (CN). In addition to providing RAN functionalities, such as radio signal processing and radio resource management, a base station can also provide those of the CN, such as session management and routing, in addition to housing application servers. As a result, a base station with no backhaul connection to a traditional CN can provide local services to users in its vicinity. To cover larger areas, several base stations must interconnect. With the CN functions co-located with the RAN, the links interconnecting the BSs form the backhaul network. Being setup by the BSs, potentially in an ad hoc manner, the latter may have a limited bandwidth. In this thesis, we build on the properties distinguishing self-deployable networks to revisit classical RAN problems but in the self-deployable context, and address the novel challenges created by the core network architecture. Starting with the RAN configuration, we propose an algorithm that sets a frequency and power allocation scheme. The latter outperforms conventional frequency reuse schemes in terms of the achieved user throughput and is robust facing variations in the number of users and their distribution in the network. Once the RAN is configured, we move to the CN organization, and address both centralized and distributed CN functions placements. For the centralized placement, building on the shortages of state of the art metrics, we propose a novel centrality metric that places the functions in a way that maximizes the traffic that can be exchanged in the network. For the distributed placement, we evaluate the number of needed instances of the CN functions and their optimal placement, considering the impact on the backhaul bandwidth. We further highlight the advantages of distributing CN functions, from a backhaul point of view. Accordingly, we tackle the user attachment problem to determine the CN instances serving each user when the former are distributed. Finally, with the network ready to operate, and users starting to arrive, we tackle the user association problem. We propose a novel network-aware association policy adapted to self-deployable networks, that outperforms a traditional RAN-based policy. It jointly accounts for the downlink, the uplink, the backhaul and the user throughput request
Kao, Tung-Yu. "On the throughput and delay of an adaptive channel access protocol in multihop packet radio network". Ohio : Ohio University, 1993. http://www.ohiolink.edu/etd/view.cgi?ohiou1175709407.
Texto completoGeoghegan, Mark. "Challenges of Implementing an iNET Transceiver for the Radio Access Network Standard (RANS)". International Foundation for Telemetering, 2011. http://hdl.handle.net/10150/595621.
Texto completoBanik, Pushpanjali. "Software defined virtualized cloud radio access network (SD-vCRAN) and programmable EPC for 5G". Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16225.
Texto completoLuo, Weizhi. "An intelligent radio access network selection and optimisation system in heterogeneous communication environments". Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/544.
Texto completoAbdollahi, Seyedreza. "Fully-photonic digital radio over fibre for future super-broadband access network applications". Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/10121.
Texto completoCuevas, Rodríguez Gabriel Ignacio. "Modelo de Propagación Electromagnética en una Red Utran (Umts Terrestrial Radio Access Network)". Tesis, Universidad de Chile, 2009. http://www.repositorio.uchile.cl/handle/2250/103521.
Texto completoHamdoun, Hassan. "Practical network coding schemes for energy efficient long term evolution radio access networks". Thesis, Swansea University, 2013. https://cronfa.swan.ac.uk/Record/cronfa42828.
Texto completoUnger, Peter [Verfasser]. "Radio Access Network Planning and Optimization of Hybrid Cellular and Broadcasting Systems / Peter Unger". Aachen : Shaker, 2010. http://d-nb.info/1081884878/34.
Texto completoNtagkounakis, Konstantinos E. "Radio network deployment and interference mitigation methodologies for 2-11 GHz broadband wireless access". Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432491.
Texto completoRamos, Reuben Elroy. "The design and performance evaluation of a point-to-multipoint millimetric radio network". Thesis, King's College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286158.
Texto completoRoy, Indranil. "A NOVEL APPROACH FOR PLACING ACCESS POINTS IN AN ULTRA-DENSE 5G NETWORK WITH OPTIMUM POWER AND BANDWIDTH". OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2303.
Texto completoAndrioli, Leandro. "Elastic-RAN: Um modelo de elasticidade multinível com grão adaptativo para Cloud Radio Access Network". Universidade do Vale do Rio dos Sinos, 2018. http://www.repositorio.jesuita.org.br/handle/UNISINOS/7427.
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Até o ano de 2020, espera-se que a área de cobertura das redes de celulares aumente em 10 vezes, com mais de 50 bilhões de dispositivos conectados, suportando 100 vezes mais equipamentos de usuários e elevando a capacidade da taxa de dados em 1000 vezes. Tal circunstância gerará um aumento massivo no tráfego de dados, fomentando o desenvolvimento da 5G e fazendo com que a indústria e as iniciativas científicas passem a voltar seus esforços para atender a essa demanda. Ganha força, então, as pesquisas relacionadas a Cloud Radio Access Networks (C-RANs), uma arquitetura que consolida as base stations (BSs) para um ponto centralizado na nuvem, mudando a ideia de atuar com recursos fixos e limitados, na medida em que se beneficia de uma das características chave da Computação em Nuvem: a elasticidade de recursos. Um dos grandes desafios na arquitetura C-RAN reside na complexidade em orquestrar todos esses recursos computacionais de forma que o processamento das requisições seja realizado com alto desempenho e com o menor custo de infraestrutura possível. Diante de todo esse contexto, a presente dissertação busca desenvolver o modelo Elastic-RAN, propondo um conceito de elasticidade multinível não bloqueante, com orquestração automática de recursos através da coordenação de BBU Pools e seus BBUs, junto a um mecanismo de grão elástico adaptativo. A elasticidade multinível não bloqueante permite controlar o nível de BBU Pool (máquina física), haja vista o alto volume de tráfego e a distância máxima sugerida entre as antenas e os pools, e o nível de BBU (máquina virtual), em razão do alto processamento de CPU e memória necessária para as requisições, de modo a não penalizar os processamentos correntes. O mecanismo de grão elástico adaptativo permite provisionar e mapear os recursos sob demanda e em tempo de execução, considerando o uso corrente dos recursos, para que cada ação elástica seja executada com um grão próximo das necessidades correntes de processamento. O modelo Elastic-RAN foi avaliado por intermédio de experimentos que simularam diferentes perfis de cargas, os quais são executados em uma aplicação intensiva de CPU e de tráfego na rede, explorando a transferência de streamings e processando decodificação de blocos. Como resultados, foi possível constatar que o Elastic-RAN pode atingir ganhos que vão de 4% a 26%, em relação aos custos de execução, quando comparado à abordagem de elasticidade tradicional. Além disso, obteve melhor eficiência para todos os perfis de carga e reduziu em até 55% a quantidade de operações elásticas necessárias. Outrossim, frente a abordagem sem elasticidade, os ganhos de custos foram ainda superiores, ficando entre 51% e 70%.
It is expected that, by 2020, cell phone networks will have been increased 10 times their coverage area, with more than 50 billion connected devices, supporting 100 times more user equipment and increasing data rate capacity by 1000 times. This will lead to a massive increase in data traffic, fostering the development of 5G and making industry and scientific initiatives turn their efforts to meet this demand. In this scenario, Cloud Radio Access Networks (C-RANs) based researches, an architecture that consolidates base stations (BSs) to a cloud-centric point, are gaining momentum, changing the idea of fixed and limited resources, as it benefits from one of the key features of Cloud Computing: resource elasticity. One of the major challenges in C-RAN architecture lies in the high complexity of orchestrating all of these computational resources in order to perform the requests processing with high performance and the lowest possible infrastructure cost. Considering this context, the present dissertation seeks to develop the Elastic-RAN model, proposing a multilevel non-blocking elasticity concept, with automatic orchestration of resources through the coordination of BBU Pools and their BBUs, with an adaptive elastic grain mechanism. The multilevel non-blocking elasticity allows it control the level of BBU Pool (physical machine), given the high volume of traffic and the suggested maximum distance between antennas and pools, and the level of BBU (virtual machine), due to the high CPU processing and memory required for the requests, so as not to penalize the current processing. The adaptive elastic grain mechanism allows the provisioning and mapping of resources on demand and at runtime, considering the current use of resources, so that each elastic action is performed with a grain close to the current processing needs. The Elastic-RAN model was evaluated through experiments that simulated different load profiles, which are executed in an intensive CPU and network traffic application, exploiting the transfer of streamings and processing block decoding. As a result, it was possible to observe that Elastic-RAN may achieve gains ranging from 4 % to 26 %, in relation to execution costs, when compared to the traditional elasticity approach. In addition, it achieved better efficiency for all load profiles and reduced by 55 % the amount of elastic operations required. Also, given the non-elasticity approach, cost gains were even higher, going from 51 % to 70 %.
Galeana, Zapién Hiram. "Contribution to resource management in cellular access networks with limited backhaul capacity". Doctoral thesis, Universitat Politècnica de Catalunya, 2011. http://hdl.handle.net/10803/52811.
Texto completoBolívar, Díaz Nicolás. "Medium access control messaging scheme for cognitive radio networks". Doctoral thesis, Universitat de Girona, 2012. http://hdl.handle.net/10803/84098.
Texto completoKondareddy, Yogesh Reddy Agrawal Prathima. "MAC and routing protocols for multi-hop cognitive radio networks". Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SUMMER/Electrical_and_Computer_Engineering/Thesis/Kondareddy_Yogesh_18.pdf.
Texto completoPopescu, Alexandru. "Cognitive Radio Networks : Elements and Architectures". Doctoral thesis, Blekinge Tekniska Högskola, Institutionen för kommunikationssystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00575.
Texto completoVassiliou, Vasos. "An integration framework and a signaling protocol for MPLS/DiffServ/HMIP radio access networks". Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13732.
Texto completoShinde, Swapnil Sadashiv. "Radio Access Network Function Placement Algorithms in an Edge Computing Enabled C-RAN with Heterogeneous Slices Demands". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20063/.
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