Tesis sobre el tema "Broadband and LTE"
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SANTOS, DIEGO DOS. "COVERAGE AND CAPACITY PLANNING OF LTE BROADBAND ACCESS NETWORKS". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2010. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=17607@1.
Texto completoFUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
Atualmente, as redes celulares estão sendo utilizadas como uma saída para prover serviços de banda larga em locais que ainda não são atendidos pelas redes fixas, principalmente em países subdesenvolvidos como o Brasil. As tecnologias empregadas atualmente no Brasil, o GSM (Global System for Mobile) e o UMTS (Universal Mobile Telecommunications System), não são tecnologias desenvolvidas para absorver a grande demanda que vem sendo observada no mercado de banda larga móvel. Devido a essa demanda inesperada, acredita-se que o LTE (Long Term Evolution), a primeira tecnologia desenvolvida com o objetivo de atender não somente as chamadas de voz, mas principalmente as conexões banda larga, apresente condições de suportar com maior eficiência esta crescente necessidade. Para que todas as expectativas relacionadas à capacidade das redes LTE sejam atendidas, é extremamente necessário que um correto dimensionamento dessas redes seja realizado, pois somente desta forma será possível estabelecer o compromisso de se atender os usuários com qualidade.
At the moment, the cellular networks are being used as an option to provide broadband services in places that have not yet been covered by the fixed networks, mainly in underdeveloped countries like Brazil. The employed technologies now in Brazil, GSM (Global System is Mobile) and UMTS (Mobile Universal Telecommunications System), they were not developed to absorb the great demand that has been observed at the broadband mobile market. Due to that unexpected demand, it’s being believed that LTE (Long Term Evolution), the first technology developed with the objective of supporting not only the voice calls, but mainly the broadband connections, is able to hold with larger efficiency this growing needs. For all that expectations about the LTE network’s capacity be achieved, it is extremely necessary that a correct sizing of those networks be accomplished, therefore only this way it will be possible to establish the commitment of supporting the subscribers with quality.
Chen, Xi. "Analysis of the Impact of TD-LTE on mobile broadband". Thesis, KTH, Skolan för informations- och kommunikationsteknik (ICT), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-141341.
Texto completoAlotaibi, Sultan. "3GPP Long Term Evolution LTE Scheduling". Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc490046/.
Texto completoДемченко, І. В. y А. В. Булашенко. "Аналіз побудови мережі LTE". Thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/67508.
Texto completoFältström, Johan y Fredrik Gidén. "LiUMIMO : A MIMO Testbed for Broadband Software Defined Radio". Thesis, Linköping University, Department of Electrical Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18331.
Texto completoIn order to keep up with the increasing demand on speed and reliability in modern wireless systems, new standards have to be introduced. By using Multiple Input Multiple Output technology (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) technologies the performance can be increased dramatically. Forthcoming standards such as WLAN 802.11n, WiMax and 3GPP LTE are all taking advantage of MIMO technology. To perform realistic tests with these standards it is often not enough to run software simulations in for example Matlab. Instead, as many real world parameters as possible need to be included. This can be done using a testbed, like the LiUMIMO, that actually transmits and receives data through the air.
The LiUMIMO is designed as a Software Defined Radio (SDR), only the RF front end and the data log are implemented in hardware, while all signal processing will be performed in Matlab.
Almantheri, H. M. "Provision of broadband Internet in Oman by joining LTE-A with TV white space (TVWS)". Thesis, University of Salford, 2016. http://usir.salford.ac.uk/41559/.
Texto completoCALABUIG, GASPAR JORGE. "Broadcasting in 4G mobile broadband networks and its evolution towards 5G". Doctoral thesis, Universitat Politècnica de València, 2015. http://hdl.handle.net/10251/48561.
Texto completoCalabuig Gaspar, J. (2015). Broadcasting in 4G mobile broadband networks and its evolution towards 5G [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/48561
TESIS
Huang, Yulin. "VLSI Implementation of Key Components in A Mobile Broadband Receiver". Thesis, Linköping University, Computer Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-18798.
Texto completoDigital front-end and Turbo decoder are the two key components in the digital wireless communication system. This thesis will discuss the implementation issues of both digital front-end and Turbo decoder.The structure of digital front-end for multi-standard radio supporting wireless standards such as IEEE802.11n, WiMAX, 3GPP LTE is investigated in the thesis. A top-to-down design methods. 802.11n digital down-converter is designed from Matlab model to VHDL implementation. Both simulation and FPGA prototyping are carried out.As another significant part of the thesis, a parallel Turbo decoder is designed and implemented for 3GPPLTE. The block size supported ranges from 40 to 6144 and the maximum number of iteration is eight.The Turbo decoder will use eight parallel SISO units to reach a throughput up to 150Mits.
IQBAL, MUSTAZAR. "Advanced High Efficiency and Broadband Power Amplifiers Based on GaN HEMT for Wireless Applications". Doctoral thesis, Politecnico di Torino, 2017. http://hdl.handle.net/11583/2672421.
Texto completoYrjölä, 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.
Texto completoTiivistelmä 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
Ramezani, Khosrow. "Coordinated Robust Authentication In Wireless Networks". Thesis, Griffith University, 2016. http://hdl.handle.net/10072/367051.
Texto completoThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Information and Communication Technology
Science, Environment, Engineering and Technology
Full Text
Havlíčková, Klára. "Analýza současných služeb vybraného mobilního operátora". Master's thesis, Vysoká škola ekonomická v Praze, 2011. http://www.nusl.cz/ntk/nusl-124710.
Texto completoMadureira, Carla Raquel Castro da Rocha. "New generation networks and the telecommunications universal service in Portugal". Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/14096.
Texto completoThis thesis addresses the issue of Universal Service for telecommunications in the context of the access networks of next generation. This work aims to contribute to the redefinition of the concept of universal telecommunications service focusing primarily on extending it to broadband services as economic and social development factor and taking into account the degree of dependence that currently, modern societies have for the different communication and information services. Complementarily it also intended to meet some of the challenges set out in the European 2020 agenda. Universal Service is defined here as access to a telecommunications network (with obligations in terms of type and quality of service for the operator), by of all citizens at any country's geographical location, with uniform and accessible price. The approach adopted is the State as a mentor for social equity, respectful of the liberalized market dynamics but also knowledgeable of the requirements of modern telecommunications services and its relationship with the different technologies available. The possibility of subsidizing is assumed. The Universal Service´s provision is subject to open to all operators, which are assumed to possess other profitability businesses, than the Universal Service, using technologies similar to those prescribed for the respective Universal Service provision contest. Although the work has components of economic and financial analysis, the approach is the engineering point of view, looking for help to identify technical and organizational solutions which offer prospects for the dissemination and adoption of next generation network solutions. As a point of departure the work gives an overview on the state of the art access networks , trying to identify which of the differences between this reality and possible scenarios for next-generation network with potential access to the generality of the people . The case of the Portuguese reality will be given special attention, taking into account their specific characteristics in terms of geography, demography, economics and market dynamics. The main results of this work are: • Identification of possible scenarios for the evolution of existing networks, in particular in areas with deficit coverage. • Identification of possible operating models and business to the materialization of the above scenarios developed and its economic analysis in an attempt to determine the critical factors associated with sustainability and / or need for subsidies. • Contribution to the regulatory framework of new generation networks from the point of view of the constraints of technology and the specifics of the Universal Service.
Esta tese aborda a questão do serviço universal de telecomunicações no contexto das redes de acesso de nova geração. Este trabalho pretende contribuir para a redefinição do conceito de Serviço Universal de Telecomunicações concentrando-se principalmente em estendê-lo a serviços de banda larga como factor de desenvolvimento económico e social e tendo em conta o grau de dependência que, actualmente, as sociedades modernas têm em relação aos diferentes serviços de comunicação e informação. De forma complementar pretende-se também ir ao encontro de alguns dos desafios enunciados na Agenda Europeia 2020. Serviço Universal é aqui definido como o acesso a uma rede de telecomunicações (com obrigações em termos de tipo e qualidade de serviço para o operador), por parte de todos os cidadãos, em qualquer localização geográfica do país, a preços uniformes e acessíveis. A perspectiva adoptada é a Estatal como mentor da equidade social, respeitador das dinâmicas de mercado liberalizado mas também conhecedor dos requisitos dos modernos serviços de telecomunicações e da sua relação com as diferentes tecnologias disponíveis. A possibilidade de subsidiação é assumida. A prestação de Serviço Universal é sujeita a concurso aberto a todos os operadores, que se assume possuírem outros negócios, que não apenas o Serviço Universal, com rentabilidade e usando tecnologias semelhantes às preconizadas para a respectiva prestação de Serviço Universal. Embora o trabalho desenvolvido tenha componentes de análise económico-financeira, a abordagem utilizada é a de engenharia, procurando contribuir para a identificação de soluções técnicas e organizacionais que possam oferecer perspectivas sustentáveis para a disseminação e adopção das soluções redes de nova geração. Como ponto de partida o trabalho apresenta uma visão geral sobre o estado da arte das redes de acesso, procurando identificar quais os diferenciais existentes entre essa realidade e a de possíveis cenários de rede de próxima geração com potencial de acesso para a generalidade dos cidadãos. O caso da realidade Portuguesa será objecto de uma atenção especial, tendo em consideração as suas especificidades em termos de geografia, demografia, economia e dinâmicas do mercado. Os principais resultados deste trabalho são os seguintes: • Identificação de possíveis cenários para a evolução das redes actuais, nomeadamente em áreas com deficit de cobertura de rede. • Identificação de possíveis modelos de operação e negócio para a materialização dos cenários acima desenvolvidos e respectiva análise económica, como tentativa de determinar os factores críticos associados à sua sustentabilidade e /ou necessidade de subsidiação. • Contributo para o quadro regulatório das Redes de Nova Geração sob o ponto de vista dos constrangimentos das tecnologias e das especificidades do Serviço Universal.
Leyva, Mayorga Israel. "On reliable and energy efficient massive wireless communications: the road to 5G". Doctoral thesis, Universitat Politècnica de València, 2019. http://hdl.handle.net/10251/115484.
Texto completoLa cinquena generació de xarxes mòbils (5G) es troba molt a la vora. S'espera que proveïsca de beneficis extraordinaris a la població i que resolga la majoria dels problemes de les xarxes 4G actuals. L'èxit de 5G, per a la qual ja ha sigut completada la primera fase del qual d'estandardització, depén de tres pilars: comunicacions tipus-màquina massives, banda ampla mòbil millorada, i comunicacions ultra fiables i de baixa latència (mMTC, eMBB i URLLC, respectivament, per les seues sigles en anglés). En aquesta tesi ens enfoquem en el primer pilar de 5G, mMTC, però també proveïm una solució per a aconseguir eMBB en escenaris de distribució massiva de continguts. Específicament, les principals contribucions són en les àrees de: 1) suport eficient de mMTC en xarxes cel·lulars; 2) accés aleatori per al report d'esdeveniments en xarxes sense fils de sensors (WSNs); i 3) cooperació per a la distribució massiva de continguts en xarxes cel·lulars. En l'apartat de mMTC en xarxes cel·lulars, aquesta tesi realitza una anàlisi profunda de l'acompliment del procediment d'accés aleatori, que és la forma mitjançant la qual els dispositius mòbils accedeixen a la xarxa. Aquestes anàlisis van ser inicialment dutes per mitjà de simulacions i, posteriorment, per mitjà d'un model analític. Els models van ser desenvolupats específicament per a aquest propòsit i inclouen un dels esquemes de control d'accés més prometedors: el access class barring (ACB). El nostre model és un dels més precisos que es poden trobar i l'únic que incorpora l'esquema d'ACB. Els resultats obtinguts per mitjà d'aquest model i per simulació són clars: els accessos altament sincronitzats que ocorren en aplicacions de mMTC poden causar congestió severa en el canal d'accés. D'altra banda, també són clars en què aquesta congestió es pot previndre amb una adequada configuració de l'ACB. No obstant això, els paràmetres de configuració de l'ACB han de ser contínuament adaptats a la intensitat d'accessos per a poder obtindre unes prestacions òptimes. En la tesi es proposa una solució pràctica a aquest problema en la forma d'un esquema de configuració automàtica per a l'ACB; l'anomenem ACBC. Els resultats mostren que el nostre esquema pot aconseguir un acompliment molt proper a l'òptim sense importar la intensitat dels accessos. Així mateix, pot ser directament implementat en xarxes cel·lulars per a suportar el trànsit mMTC, ja que ha sigut dissenyat tenint en compte els estàndards del 3GPP. A més de les anàlisis descrites anteriorment per a xarxes cel·lulars, es realitza una anàlisi general per a aplicacions de comptadors intel·ligents. És a dir, estudiem un escenari de mMTC des de la perspectiva de les WSNs. Específicament, desenvolupem un model híbrid per a l'anàlisi de prestacions i l'optimització de protocols de WSNs d'accés aleatori i basats en clúster. Els resultats mostren la utilitat d'escoltar el mitjà sense fil per a minimitzar el nombre de transmissions i també de modificar les probabilitats de transmissió després d'una col·lisió. Pel que fa a eMBB, ens enfoquem en un escenari de distribució massiva de continguts, en el qual un mateix contingut és enviat de forma simultània a un gran nombre d'usuaris mòbils. Aquest escenari és problemàtic, ja que les estacions base de la xarxa cel·lular no compten amb mecanismes eficients de multicast o broadcast. Per tant, la solució que s'adopta comunament és la de replicar el contingut per a cadascun dels usuaris que ho sol·liciten; és clar que això és altament ineficient. Per a resoldre aquest problema, proposem l'ús d'esquemes de network coding i d'arquitectures cooperatives anomenades núvols mòbils. En concret, desenvolupem un protocol per a realitzar la distribució massiva de continguts de forma eficient, juntament amb un model analític per a la seua optimització. Els resultats demostren que el model proposat és simple i precís
The 5th generation (5G) of mobile networks is just around the corner. It is expected to bring extraordinary benefits to the population and to solve the majority of the problems of current 4th generation (4G) systems. The success of 5G, whose first phase of standardization has concluded, relies in three pillars that correspond to its main use cases: massive machine-type communication (mMTC), enhanced mobile broadband (eMBB), and ultra-reliable low latency communication (URLLC). This thesis mainly focuses on the first pillar of 5G: mMTC, but also provides a solution for the eMBB in massive content delivery scenarios. Specifically, its main contributions are in the areas of: 1) efficient support of mMTC in cellular networks; 2) random access (RA) event-reporting in wireless sensor networks (WSNs); and 3) cooperative massive content delivery in cellular networks. Regarding mMTC in cellular networks, this thesis provides a thorough performance analysis of the RA procedure (RAP), used by the mobile devices to switch from idle to connected mode. These analyses were first conducted by simulation and then by an analytical model; both of these were developed with this specific purpose and include one of the most promising access control schemes: the access class barring (ACB). To the best of our knowledge, this is one of the most accurate analytical models reported in the literature and the only one that incorporates the ACB scheme. Our results clearly show that the highly-synchronized accesses that occur in mMTC applications can lead to severe congestion. On the other hand, it is also clear that congestion can be prevented with an adequate configuration of the ACB scheme. However, the configuration parameters of the ACB scheme must be continuously adapted to the intensity of access attempts if an optimal performance is to be obtained. We developed a practical solution to this problem in the form of a scheme to automatically configure the ACB; we call it access class barring configuration (ACBC) scheme. The results show that our ACBC scheme leads to a near-optimal performance regardless of the intensity of access attempts. Furthermore, it can be directly implemented in 3rd Generation Partnership Project (3GPP) cellular systems to efficiently handle mMTC because it has been designed to comply with the 3GPP standards. In addition to the analyses described above for cellular networks, a general analysis for smart metering applications is performed. That is, we study an mMTC scenario from the perspective of event detection and reporting WSNs. Specifically, we provide a hybrid model for the performance analysis and optimization of cluster-based RA WSN protocols. Results showcase the utility of overhearing to minimize the number of packet transmissions, but also of the adaptation of transmission parameters after a collision occurs. Building on this, we are able to provide some guidelines that can drastically increase the performance of a wide range of RA protocols and systems in event reporting applications. Regarding eMBB, we focus on a massive content delivery scenario in which the exact same content is transmitted to a large number of mobile users simultaneously. Such a scenario may arise, for example, with video streaming services that offer a particularly popular content. This is a problematic scenario because cellular base stations have no efficient multicast or broadcast mechanisms. Hence, the traditional solution is to replicate the content for each requesting user, which is highly inefficient. To solve this problem, we propose the use of network coding (NC) schemes in combination with cooperative architectures named mobile clouds (MCs). Specifically, we develop a protocol for efficient massive content delivery, along with the analytical model for its optimization. Results show the proposed model is simple and accurate, and the protocol can lead to energy savings of up to 37 percent when compared to the traditional approach.
Leyva Mayorga, I. (2018). On reliable and energy efficient massive wireless communications: the road to 5G [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/115484
TESIS
Rudys, Saulius. "Development of the methods of broadband dielectric spectroscopy by investigating (1-x)(Na1/2 Bi1/2)TiO3 - xLa(Mg1/2 Ti1/2)O3 and other materials". Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20121001_093609-73724.
Texto completoŠiame darbe nagrinėjamos galimybės patobulinti plačiajuostės dielektrinės spektroskopijos metodus naudojant skaitmeninius ir analitinius daugelio modų dielektrinės skvarbos skaičiavimo metodus, tiriami (1-x)(Na1/2 Bi1/2)TiO3 - xLa(Mg1/2 Ti1/2)O3 (NBT-LMT) keramikų grupės laidumo ypatumai. Nagrinėjama galimybė pritaikyti HFSS skaitmeninio modeliavimo programą dielektrinės spektroskopijos tikslams. Naudojant šią programinę įrangą, apskaičiuojama dielektrinė ir magnetinė skvarbos komplikuotiems mikrojuostelinės linijos ir dalinai užpildyto bangolaidžio matavimo grandinių atvejams. Pateikiami patobulinti kondensatoriaus koaksialinėje linijoje ir ribotų matmenų atviro galo koaksialinės linijos matematiniai modeliai. Šie modeliai patikrinami skaitmeniniu metodu. Naudojant daugiamodį kondensatoriaus modelį, atsižvelgus į magnetinio lauko pasiskirstymą koaksialinėje matavimo grandinėje, pasiūlomas būdas pamatuoti mažai bandinio magnetinei skvarbai, kai dielektrinė skvarba didelė (dešimtim ar šimtais kartų didesnė už magnetinę skvarbą). Atviro galo koaksialinei linijai siūloma keletas kalibravimo būdų, įrenginys bandiniui prispausti prie linijos. Bešvinė NBT-LMT keramika buvo tyrinėjama dielektrinės spektroskopijos metodais. Gauti rezultatai rodo, kad NBT-LMT keramikų grupėje elektriniam laidumui galioja Maerio-Neldelio taisyklė.
Broadbent, Andrew. "Aminoacyl-tRNA Synthetase Production for Unnatural Amino Acid Incorporation and Preservation of Linear Expression Templates in Cell-Free Protein Synthesis Reactions". BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5703.
Texto completoMing-HungLi y 李明鴻. "Broadband antenna for LTE applications". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/56177337524833869160.
Texto completo國立成功大學
電機工程學系碩博士班
101
The study of this thesis is LTE antenna designs for notebook application. The first design is a composite antenna design combining a planar inverted-F antenna and a monopole antenna, which can cover the WWAN band operation. The second design is to use two antennas to resonant lower band and higher band resonance modes separately. The design can cover the LTE band and have good radiation performance. The third design is an idea of antenna frequency band switching by adding a diode on antenna body. The antenna can cover the LTE band by switch lower frequency band and have a good performance.
Tian, Qi-Hui y 田麒暉. "Broadband Mobile Communication Antennas for LTE/WWAN Applications". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/8mfsre.
Texto completo國立高雄應用科技大學
電子工程系碩士班
103
In this thesis, three kinds of low profile and broadband planar monopole antennas are proposed for application to the LTE700/2300/2500 bands and wireless wide area network (WWAN) operation in the GSM850/900/DCS1800/PCS1900/UMTS bands. The first design uses a radiated monopole and extended strip line from the ground plane to produce a multimode operation for mobile phone application. The second design combines the modified monopole with shorted parasitic element to form a radiating structure. The third design utilizes the coupling effect between the modified G-shaped monopole and shorted meander to achieve a multiband operation and compact size. Above both designs are suitable for tablet computer application. The measured results show that the proposed antennas can apply in the LTE/WWAN bands.
Cheng, Chen y 程晨. "Mobile Broadband 4G LTE Network Failure Detection Based on Data Analytics". Thesis, 2015. http://ndltd.ncl.edu.tw/handle/07856835016612334844.
Texto completo國立交通大學
資訊科學與工程研究所
103
A system is defined to monitor and manage mobile broadband 4G LTE network. Network failure detection is the main function of this system. The network failures in mobile broadband network impact telecom services. It causes great loss to business. The current management systems used in the LTE network mostly deal with problems located in local domains. There are few systems used for monitoring the whole LTE network and evaluating network performance comprehensively. With the fast development of mobile broadband network and the increase of user requirements, the data transmission abilities and the capacities of network equipment are under great demand. Hence the comprehensive monitoring of LTE network is important to detect network failures and locate the fault node in a timely manner. This thesis research is based on the LTE network environment supported by Mobile Broadband Laboratory (BML) of National Chiao Tung University (NCTU). We designed and realized a system for LTE network failure detection. The system integrates traditional network management technology with LTE system architecture. It takes the network resources allocation into consideration to detect failure caused by unbalanced resource allocation and resource preemption.
HSIAO, CHIH-WEI y 蕭智維. "Broadband Dual-Polarized Antenna Design for LTE and 5G Small Base Stations". Thesis, 2019. http://ndltd.ncl.edu.tw/handle/nkzgz9.
Texto completo南臺科技大學
電子工程系
107
Because of the signal transmission distance of the new generation mobile communication is short. In order to solve the problem of insufficient coverage of 4G mobile communication, this thesis proposes two broadband dual-polarized base stations antenna design for LTE and 5G C-band. These designs are operating at the frequency band of 4G mobile communication making up for the shortage of the new generation mobile communication signal coverage. The first dual-polarized antenna design for the LTE 2300 / LTE 2500 / WRC15 C-band (3.4 – 3.6 GHz) / China 5G C-band (3.3 – 3.6 GHz). The overall dimensions are 105 mm × 105 mm × 27 mm. The antenna consists of two pairs of coplanar symmetrical dipoles, and two microstrip lines, and square loop-shape structures, and two metal cylinders and a reflector. The square loop-shape structure connected by the microstrip line is electromagnetically coupled to feed the dipoles, and its dipoles and metal cylinder are connected to the reflector. By changing the geometry of the square loop structures and symmetrical dipoles, the impedance bandwidth of the design is 51.11 % (2.17 to 3.66 GHz), the isolation is greater than 25 dB, the half-power beamwidth of the main beam is 65 5 degree, and the gain is from 8.3 to 9.4 dBi. The second dual-polarized slot dipole antenna design for the LTE 2300 / LTE 2500 / WRC15 C-band / China 5G C-band. The overall dimension is 104 mm × 104 mm × 33.8 mm. The proposed antenna is electromagnetically coupled through a microstrip line to feed the slot dipoles. The impedance bandwidth of the design is 48.23 (2.25 – 3.68 GHz), and the isolation is greater than 25 dB, the half-power beamwidth of the main beam is 65 5 degree, the front-to-back ratio better than 27 dB, and the gain is from 8.6 to 9.7 dBi. In order to improve the isolation and pattern, two metal cylinders and metal metallic loop are added to the antenna configuration.
Chiu, Wen-hsin y 邱文信. "Planar Broadband Oval-C Antenna for LTE 700 and GSM 850/900 4G Applications". Thesis, 2012. http://ndltd.ncl.edu.tw/handle/69459086423636742287.
Texto completo國立臺南大學
光電工程研究所
100
This paper presents a broadband antenna presently being used in LTE 700/GSM 850/900 systems for smart phone applications. The proposed CPW-fed monopole antenna consists of the oval-C and dual-L shape strips. The impedance bandwidth defined by return loss S11 ≦ -10 dB is from 660 to 975 MHz. The antenna bandwidth includes LTE 700 (698-806 MHz), GSM 850 (824-894 MHz), and GSM 900 (880-960 MHz) GSM 850/900 bands. Long term evolution (LTE) is one of the mobile communication technologies that are targeting the 700 MHz band (LTE bands 13 and 17: 698-806 MHz). The LTE service is expected to provide better communication quality than the existing services, such as GSM 850 (824-894 MHz), GSM 900 (880-960 MHz). However, mobile phones are desired to be able to cover at least a few of the existing service bands and LTE bands at the same time especially before the wide spread of the LTE services. The measured peak gains are 1.5 ~ 2.9 dBi with sufficient bandwidths to cover modern portable communication devices. The radiation efficiencies are all larger than 75% for an entire band. The simulated and measured results show the good agreement. This proposed antenna with multiband, broadband matched impedance, stable radiation patterns, constant antenna gains and compact size can be suitable for multi-mode applications.
Awad, Mohamad. "Resource Allocation for Broadband Wireless Access Networks with Imperfect CSI". Thesis, 2009. http://hdl.handle.net/10012/4553.
Texto completoKao, Yueh-Feng y 高嶽峰. "To Estimate the Development of LTE and WiMAX 4G Wireless Broadband Technology with Forecasting Method". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/31257316238818396835.
Texto completo國立交通大學
理學院應用科技學程
99
The purpose of this research is to observe the fast developing of communication industry. At the moment of the 4G technology beginning, we try to forecast its development and suggest how the industrial deployment should be. The main objects are LTE and WiMAX. We observe the technology development and also the changing of their market. Then we use Senrio and Dephi to find out the possibility of its development. The result of this resourch shows that LTE will replace 3G and be the next main technology of wireless communication. WiMAX will be in the middle of that and phase out soon. Finally, we estimate that there will be two major products based on 4G technology. One is personal mobile vedio device, and another is smart device on vehicle. For further research, we suggest that application and service on 4G network could be a good direction.
Kuan, Chin-chiu y 關慶球. "Essentially Discussion on Customer Satisfaction andCustomer Loyalty for ADSL Broadband Network―Taking the Broad Kaohsiung Area of ChunghwaTelecom. Co., Ltd as an Example". Thesis, 2003. http://ndltd.ncl.edu.tw/handle/80719381304105363103.
Texto completo國立中山大學
企業管理學系研究所
91
In attempt to build to a high technological and digital communication Taiwan,the country government plan to build up the broadband network to six million subscribers in its challenging the country developed 6 years program in 2008. The construction of broadband network will be the main stream of market. Chunghwa Telecom’s ADSL program is satisfied with the requirement of society. The object of this research is based on the ADSL customers at the broad Kaohsiung Area of Chunghwa Telecom. The investigation area encompassKaohsiung city, Fongsun, Kungsun, Chiesun of Kaohsiung County. The investigation adopts the method of questionnaire. Data are collected via Stratified Random Sampling, and analyzed by SPSS statistic software. It is also implemented by using seven factors that affect customer satisfaction like service contents, prices, convenience, enterprise images, service facilities, service staffs and service process in connection with service quality, customer satisfaction, and customer loyalty. The result of this investigation occurs as below: There is a remarkable different between customer’s satisfaction and values in response to the practical aspect of quality. Different customers respond with market different from sex, age, and choosing a place to use Internet are varied in satisfaction. The group of customer responds satisfaction from different person requires Internet service. It exist conspicuous difference in the choice. The obvious mutuality between the practical aspect of service quality and customer’s satisfaction has positive effects. The practical aspect of service quality in different place of using Internet, the item of service quality, and customer satisfaction are clearly differ from each others. Different customers respond with market different from sex, marriage, and age to use Internet are varied in loyalty. The group of customer who requires different personal Internet service is remarkable difference from loyalty in the choice. The obvious mutuality between the practical aspect of service quality and customer’s loyalty has positive effects. The practical aspect of service quality in different place of using Internet, the item of service quality, and customer loyalty are clearly differ from each others. According to the above-mentioned result of research, it brings up suggestions depending on service contents, prices, convenience, enterprise images, service facilities, service staffs, and service process
Hwang, Wen-Lang y 黃文郎. "The Study of Service Quality and Customer Satisfaction for Broadband Network Maintenance — An Example of ADSL Subscribers of Northern Region Branch Chunghwa Telecom Co., Ltd". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/69062495390025795392.
Texto completo中原大學
企業管理研究所
95
The broadband network technology of Asymmetric Digital Subscriber Line (ADSL) is hot in the market all over the world. Especially in Asia and Europe, the ADSL broadband access network has become the master technology. ADSL has high bandwidth, low cost, and so convenient that can be used in the existing telephone cable; with so many advantages, ADSL has been by big telecom. The connection of ADSL is point to point, has good service quality, and is getting more and more popular. In recent years, because Chunghwa Telecom Co., Ltd. try to construct ADSL network hardly and take promotions to improve the number of users, ADSL has become very popular, and the users of ADSL is saturated now. By the dependence and the demand of ADSL, people in Taiwan also ask telecom to provide better service quality in maintenance. The research regards the ADSL users in nortern Taiwan as the objects. This study used “convenience sampling” to take the questionnaire survey, and sampled 500 clients in more than 2,010,000 users of nortern Taiwan, with 396 valid questionnaires reclaimed. This study adopted the PZB model, proposed by Parsuraman, Zeithamland and Berry, to analyze the gaps in service quality. This study took the service quality of ADSL maintenance into account, and studied the relation between the customer gap of service quality and the customer satisfaction. Furthermore, this study researched if there is any obvious influence of the customer satisfaction on customer loyalty. In otherwise, this study studied whether the influence of gap of customer service quality on customer satisfaction will be interfered by users and their background In data analyzing, this study took software SPSS version 10.0 as the statistical analysis tool. The regression model is constructed, and studies the gap of service quality versus the effect of broadband user’ satisfaction. There are three entries of the major result in this research: 一、For customers’ cognition and expectation in the gap of service quality,“Eliability”and“Assurance”will affect the degree of customer satisfaction. 二、Positive relationship is reflected by customer satisfaction and loyalty. 三、The influence of gap customer service quality on customers’ satisfaction will be interfered by demographic characteristics such as Sex, Age, Education level, and use characteristics of differential transmission rate of ADSL.