Dissertations / Theses on the topic 'Global system for mobile communications'
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Prince, Castro Jonathan Castro Jonathan Prince. "A global satellite system for mobile communications /." [S.l.] : [s.n.], 1995. http://library.epfl.ch/theses/?nr=1300.
Full textChan, Ka Chun. "A dual channel location estimation system for mobile computing." HKBU Institutional Repository, 2003. http://repository.hkbu.edu.hk/etd_ra/445.
Full textKan, Ka Ho. "Location estimation system based on the GSM network." HKBU Institutional Repository, 2004. http://repository.hkbu.edu.hk/etd_ra/524.
Full textLee, See Taur. "Quad-band global system for mobile communications complementary metal-oxide-semiconductor transmitter /." Thesis, Connect to this title online; UW restricted, 2003. http://hdl.handle.net/1773/6122.
Full textLiu, Tuo. "Analytical modeling of HSUPA-enabled UMTS networks for capacity planning." Connect to full text, 2008. http://ses.library.usyd.edu.au/handle/2123/4055.
Full textTitle from title screen (viewed February 20, 2009). Includes graphs and tables. Includes list of publications co-authored with others. Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Information Technologies, Faculty of Engineering and Information Technologies. Degree awarded 2009; thesis submitted 2008. Includes bibliographical references. Also available in print form.
Ree, Leon P. "Integration of GPS navigation with mobile telephone communications using Bluetooth wireless technology." Thesis, Queensland University of Technology, 2002. https://eprints.qut.edu.au/36167/1/36167_Ree_2002.pdf.
Full textDarweesh, Turki H. "Capacity and performance analysis of a multi-user, mixed traffic GSM network." Ottawa, 1999.
Find full textSharma, Bishal. "Radio frequency optimization of a Global System for Mobile (GSM) network." Menomonie, WI : University of Wisconsin--Stout, 2008. http://www.uwstout.edu/lib/thesis/2008/2008sharmab.pdf.
Full textLiu, Tuo. "Analytical modeling of HSUPA-enabled UMTS networks for capacity planning." Thesis, The University of Sydney, 2008. http://hdl.handle.net/2123/4055.
Full textHill, Ryan Tebbutt. "Adaptive interfaces for mobile preference-based searching." Thesis, Nelson Mandela Metropolitan University, 2009. http://hdl.handle.net/10948/1248.
Full textMcAbee, Carson C. "Software-defined radio global system for mobile communications transmitter development for heterogeneous network vulnerability testing." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/38978.
Full textThe conversion from homogeneous global system for mobile communications (GSM) networks to heterogeneous GSM/universal mobile telecommunications system (UMTS) networks is rapidly expanding. Previous research identified vulnerabilities in the GSM network that were fixed in the UMTS standard; however, the mobile device must successfully access the UMTS network to take advantage of security improvements. Therefore, a possible vulnerability not addressed in either the GSM or UMTS standards is the potential for a malicious entity to prevent a mobile device from handing over from a GSM to UMTS network, because the GSM network maintains the stand-alone dedicated control channel (SDCCH) uplink time slots. The process of testing this vulnerability requires the development of a device that monitors a GSM base transceiver station, identifies when a handover to UMTS message is sent, tracks the time slots of the SDCCH uplink, and transmits a GSM handover-failure message. In this thesis, we present an open-source coding scheme that utilizes parts of the OpenBTS source code to transmit a GSM handover-failure message using the universal software radio peripheral. The method is validated through the collection of the GSM transmitter messages by Airprobes GSM-receiver software.
Pozzobon, Oscar. "Secure location services : vulnerability analysis and provision of security in location systems /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe18315.pdf.
Full textChu, Man Kin. "A hybrid approach for mobile location estimation in cellular radio networks." HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/672.
Full textMaharaj, Robin. "Design of asset tracking device with GPRS Interface." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2815.
Full textIOT devices have the potential to improve asset lifecycle optimization because of their ability to provide relevant real time data to high level applications. This data with minimal latency can assist asset managers to control the behaviour of assets and asset users to optimize asset lifecycle cost. There are many environments that require asset tracking devices but this design focussed on motor vehicles with auxiliary functions and apparatus. This research work documented the design of an asset tracking device built and tested on a 32.bit microcontroller platform with built-in CAN peripheral. This design resolved handling multiple serial interfaces collating data simultaneously concatenating this data and transmitting the data via GPRS interface as a single UDP sentence. Apart from interfacing various serial interfaces to the Stm24f4 this design also implemented a Wireless module as well as a multichannel ADC Module. This design was accomplished by researching and implementing software techniques as well as researching the hardware/firmware in terms of DMA and Nested Vector Interrupt Controller of the STM32 devices. The solution that this design will accomplish is to provide the industry an asset-tracking device with data capturing functionality capable of delivering the above needs at reasonable data cost. The device designed in this thesis is the client device of asset tracking network. This design was accomplished on a proof of concept basis delivering built hardware in the form of various application modules interfaced to a 32 –bit microcontroller via uart, SPI and CAN.
Axelsson, Karin, and Cynthia Novak. "Support for Cell Broadcast as Global Emergency Alert System." Thesis, Linköping University, Department of Science and Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9491.
Full textCell Broadcast (CB) is a possible technical realisation of a global emergency alert system. It is a technique used for sending short text messages to all mobile stations (MSs) in a defined geographical area. An potential effect of using CB is the increase in battery consumption of the MS due to the fact that an extra channel has to be used to make the service available even when the network is otherwise congested. Another part of the service which leads to a potential problem is making CB messages available in different languages. Investigating these problems is the objective of this thesis and the studies it includes. During the first part of the thesis, we measured the battery consumption of MSs in different modes of operation in order to analyse how CB affects the amount of current drained. The tests showed that battery consumption increased only slightly when CB messages were being received at the MS. Although some of the results can be, and are, discussed, we believe that CB would have a small effect on the power consumption of an MS, particularly in a context where it would be used for emergency warning messages only. This mentioned, it would however be wishful to confirm the conclusions further through the realisation of long-term testing. The second part of the thesis deals with the investigation of the MSs’ support for CB messages with different coding schemes. Based on the investigation’s result, we have come to the conclusion that in the long term the usage of different coding schemes on the same channel is preferred. However, the usage of one, global, emergency channel is hard to realise since that requires a standardisation between all countries. In our opinion this may be achieved first in the long run and until then, the usage of separate channels seems to be necessary.
Cuvelliez, Charles. "Etudes des modèles d'implémentation des opérateurs de réseaux mobiles virtuels." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210895.
Full textHosting MVNOs, supporting them from both operational and commercial perspectives are new challenges for the mobile operators: they have to set up a specific internal organization because they used to be a vertically integrated industrial structure. All of this represents tremendous changes for them.
This thesis describes first the strategic models for hosting MVNOs. The regulatory aspects, that are an essential driver for the liberalization of network economies, are then analyzed. The key point is: are the MVNO able to increase the efficiency and competitiveness of mobile markets.
Another important aspect is the modelling of a mobile network: the MVNOs will use some components while other components are unuseful for them. Without such model, it is impossible to derive the right costs and price to be charged to the MVNO in order to have a win win industrial model for both the MVNO and its hosting operator.
A case study of a corporate MVNO focusing on needs of multinationals is analyzed. Such case study describes all the steps for an economic actor to become MVNO from scratch. Such MVNO are not yet present although there is a market demand.
The last chapter makes a comparative study of the MVNO markets in the European Union.
Cette étude aborde le phénomène des opérateurs de réseaux mobiles virtuels ;il s’agit d’acteurs économiques - parfois sans lien aucun avec les télécommunications - qui louent le réseau d’opérateurs mobiles ;ils deviennent à leur tour opérateurs à part entière au point de devenir concurrent non seulement des autres opérateurs mobiles mais aussi de l’opérateur mobile qui leur a loué une partie de son réseau.
L’hébergement technique de l’opérateur virtuel, son support opérationnel et commercial, l’organisation que doit mettre en place l’opérateur mobile pour héberger son opérateur virtuel afin de partager avec lui son réseau sont des nouveaux défis auxquels les opérateurs mobiles, habitués à être des structures industrielles totalement intégrées verticalement, font face pour la première fois.
Cette étude traite des modèles d’implémentation des opérateurs de réseaux mobiles virtuels :elle aborde d’abord les aspects stratégiques qui fixent le cadre pour les opérateurs mobiles qui veulent ou sont forcés à héberger des opérateurs virtuels. Les aspects réglementaires, une composante essentielle des économies de réseaux en voie de libéralisation, sont ensuite étudiés, en particulier, comment les opérateurs virtuels peuvent contribuer à améliorer la compétitivité et la libéralisation de ces marchés.
L’étude modélise ensuite le réseau d’un opérateur mobile de façon à mettre en évidence les éléments à partager qui seront utilisés par l’opérateur virtuel. Cette modélisation est essentielle pour déterminer le coût de l’hébergement et du partage du réseau de façon à créer les conditions de rentabilité de ce modèle d’opérateur virtuel.
On aborde enfin un cas d’étude d’un candidat à devenir opérateur de réseau mobile virtuel qui souhaite répondre à la demande transnationale des grandes entreprises. Ce type d’opérateur virtuel est encore inexistant de nos jours.
Enfin, nous terminons par une étude comparée de la situation des opérateurs mobiles virtuels à travers l’Union Européenne.
Doctorat en sciences appliquées
info:eu-repo/semantics/nonPublished
Falk, Lolita. "Konstruktion av SMS-Gateway för effektökande SMS-tjänster." Thesis, University West, Department of Informatics and Mathematics, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-594.
Full textWang, Wenye. "Location management techniques for next generation wireless systems." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/13289.
Full textShum, Chin Yiu. "Detecting, locating, and tracking mobile user within a wireless local area network." HKBU Institutional Repository, 2013. http://repository.hkbu.edu.hk/etd_ra/1512.
Full textVan, der Walt Tjaart. "The management and implementation of a data terminal project on a global system for mobile communications / Tjaart van der Walt." Thesis, Potchefstroom University for Christian Higher Education, 1999. http://hdl.handle.net/10394/9613.
Full textThesis (MIng (Electrical Engineering))--PU for CHE, 1999
Madebwe, Charles. "An investigation into the role played by perceived security concerns in the adoption of mobile money services : a Zimbabwean case study." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017933.
Full textNellaiappan, Kalaivani. "Gobuddy - Android mobile application." CSUSB ScholarWorks, 2011. https://scholarworks.lib.csusb.edu/etd-project/3323.
Full textHensley, Phillip Hayden. "Development and Analysis of a Mobile Node Tracking Antenna Control System." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011810/.
Full textFerreira, Fábio Miguel Lopes. "Controlo de sistemas M2M com fotografias georreferenciadas." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/7644.
Full textCom esta dissertação pretende-se estudar e projectar um sistema de controlo e comunicação Machine to Machine que monitorize elementos móveis, por recurso a comunicações via GSM/UMTS (Global System for Mobile Communications/Universal Mobile Telecommunications System). A ideia do projecto é monitorizar e recolher informação telemática de um veículo utilizando a rede GSM/UMTS. As informações colectadas são, as coordenadas GPS, e informações referentes à antena GSM à qual o dispositivo se encontra ligado, assim como a recolha de fotografias. O dispositivo criado permite assim a georreferenciação fotográfica, sendo um excelente método para segurança e monitorização remota.
This dissertation's concern is the study and design of a system for control and communication Machine to Machine for mobile elements monitorization, communicating by GSM / UMTS (Global System for Mobile Communications / Universal Mobile Telecommunications System). The project goal is to collect and monitorize a vehicle's telematic information using the GSM / UMTS. The collected information consists of the GPS coordinates and information about the GSM antenna to which the device is connected, as well as a collection of photographs. Hence, the created device allows for photographic geo-reference, which is a reliable solution for both security and remote monitorization.
Nehme, Rimma V. "Continuous query processing on spatio-temporal data streams." Link to electronic thesis, 2005. http://www.wpi.edu/Pubs/ETD/Available/etd-082305-154035/.
Full textAniruddhan, Sankaran. "A fast-locking frequency synthesizer for GSM base-stations in 180nm CMOS /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/5952.
Full textCheng, Quan Jia. "A WLAN location estimation system using center of gravity as an algorithm selector." HKBU Institutional Repository, 2013. http://repository.hkbu.edu.hk/etd_ra/1513.
Full textSakpere, Wilson Evuarherhe. "A near field communication framework for indoor navigation : design and deployment considerations." Thesis, Cape Peninsula University of Technology, 2015. http://hdl.handle.net/20.500.11838/2290.
Full textNavigation systems are known to provide time and location information for easy and accurate navigation in a specified environment. While Global Positioning System (GPS) has recorded a considerable success for navigating outdoors, the absence of GPS indoors has made orientation in an indoor environment challenging. Furthermore, existing technologies and methods of indoor positioning and navigation, such as WLAN, Bluetooth and Infrared, have been complex, inaccurate, expensive and challenging to implement; thereby limiting the usability of these technologies in less developed countries. This limitation of navigation services makes it difficult and time consuming to locate a destination in indoor and closed spaces. Hence, recent works with Near Field Communication (NFC) has kindled interest in positioning and navigation. While navigating, users in less developed nations face several challenges, such as infrastructure complexity, high-cost solution, inaccuracy and usability. However, this research focuses on providing interventions to alleviate usability challenges, in order to strengthen the overall accuracy and the navigation effectiveness in stringent environments through the experiential manipulation of technical attributes of the positioning and navigation system in indoor environments. Therefore, this study adopted the realist ontology and the positivist epistemological approach. It followed a quantitative and experimental method of empirical enquiry, and software engineering and synthesis research methods. The study entails three implementation processes, namely map generation, positioning framework and navigation service using a prototype mobile navigation application that uses the NFC technology. It used open-source software and hardware engineering tools, instruments and technologies, such as Ubuntu Linux, Android Software Development Kit, Arduino, NFC APIs and PandaBoard. The data was collected and the findings evaluated in three stages: pre-test, experiment and post-test.
Jenkins, William George. "Real-time vehicle performance monitoring with data integrity." Master's thesis, Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.
Full textSivagnanasundaram, Suthaharan. "GSM mobility management using an intelligent network platform." Thesis, Queen Mary, University of London, 1997. http://qmro.qmul.ac.uk/xmlui/handle/123456789/3820.
Full textIraba, Marie Louise. "Inexpensive mobile technologies to empower rural farmers with m-agriculture." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9526_1370595447.
Full textMarket information and established communication between seller and buyer play an important role in business activities. This thesis investigates the Transkei area in the Eastern Cape 
Province, South Africa to find out how to empower rural farmers by providing them with less-expensive mobile technology enabling them to post and advertise their produce, access market 
information on a common database, and find and communicate with potential customers. The farmers&rsquo
requirements were identified using quantitative and qualitative methods and a prototype 
consisting of USSD and web applications was developed. It allows the farmer to follow a sequence of menu commands to send a request to the database and access market information, such 
as commodity prices, and post information about their own produce so as to attract more customers. The low cost of USSD and the ubiquity of mobile phones enable the system to be usable, affordable and effective. During the final stage of development, the system was tested successfully and addressed a major problem faced by farmers, i.e. lack of access to market information.
Silva, Vanessa Sérgio da. "Sistemas de M2M utilizando GSM." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/5602.
Full textCom esta dissertação pretende-se estudar e projectar um sistema de controlo e comunicação M2M (Machine to Machine) que monitorize elementos móveis, por recurso a comunicações GSM (Global System for Mobile Communications). A solução proposta implica monitorizar e colectar informação telemática de um veículo, utilizando o canal GSM. O dispositivo utilizado consiste num módulo GSM/GPS, programado por linguagem Python, de forma a permitir obter informação específica via GPRS. O trabalho desenvolvido foi ainda integrado numa base de dados GIS em desenvolvimento no Instituto de Telecomunicações de Aveiro.
This dissertation aims to study and design a system for control and communication M2M (Machine to Machine) for mobile elements monitorization, using the communications GSM (Global System for Mobile Communications). The proposed solution involves collecting information and monitoring a vehicle‟s telematic data, using the GSM channel. The device used consists of a module GSM/GPS, programmed in Pyhton language, to allow specific information via GPRS. This work was also integrated into a GIS database developed at the Institute of Telecommunications Aveiro.
Blood, Alan Physics Faculty of Science UNSW. "Biological effects of GSM mobile phone microwave radiation: an investigation of gene expression." Awarded by:University of New South Wales. School of Physics, 2005. http://handle.unsw.edu.au/1959.4/22071.
Full textAl-Hassani, Kassim Mohammed. "Performance measurements and analysis of the existing wireless communication technology in Iraq." Thesis, Brunel University, 2013. http://bura.brunel.ac.uk/handle/2438/9271.
Full textLi, Yafei. "Efficient group queries in location-based social networks." HKBU Institutional Repository, 2015. https://repository.hkbu.edu.hk/etd_oa/203.
Full textCardoza, Andrew Robert. "Middleware for the SUNSAT field station." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52338.
Full textENGLISH ABSTRACT: SRMA currently used on the SUNSAT field station is an effective MAC layer protocol but lacks several features. Sufficient support for flexible communication, acknowledgement of individual data packets, simultaneous communication of multiple instances from a higher layer over a single underlying layer, and a robust FTP procedure to transfer large amounts of data are some of the features that the SUNSA T field station should cater for. ORBCOMM, GSM and WAP implementations are discussed. Some features from these implementations that are useful in the LEO communication environment are designed into an additional layer of software. This additional layer, called middleware, is proposed and uses SRMA services to deliver store-and-forward services. It supports high volumes of short transactions and session suspend and resume facilities between the SUNSA T satellite and field station. Keywords: SUNSAT, Communication, Field station, WAP, GSM, ORBCOMM
AFRIKAANSE OPSOMMING: Die SRMA pakketkommunikasie-protokol op SUNSA T se prototipe grondterminaal is voldoende om die oordrag van boodskappe oor die kommunikasieverbinding te reguleer. Dit is onvoldoende om fasiliteite soos kommunikasie van 'n aantal instansies in 'n hoër kommunikasie laag oor 'n enkele laer laag en om 'n robuuste data oordrag protokol vir groot hoeveelhede data van 'n grondterminaal te ondersteun. ORBCOMM, GSM en WAP stelsel toepassings word bespreek. Resultate wat spruit uit die drie toepassings word gebruik om kommunikasie in 'n lae wentelbaan kommunikasie omgewing te bevorder. 'n Bykomende sagteware laag, bekend as middle-ware, word aanbeveel om voorafgenoemde funksionaliteit mee te implimenteer. Die middle-ware gebruik die beskikbare dienste van die SRMA pakketkommunikasie-protokol om toegang te verkry na die kommunikasie kanaal. Sodoende kan hoë volumes kort transaksies, en sessie-stop en hervat fasiliteite 'n werklikheid gemaak word. Sleutelwoord: SUNS AT, Kommunikasie, grondterminaal, WAP, GSM, ORBCOMM
Cloppenburg, Jürgen. "The regulation of global mobile personal communications by satellite : a comparative analysis of regulations, policy and perspectives in the European Union, in particular Germany, and the United States." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31153.
Full textCurrent satellite licensing regimes fail to take into account the international character of satellite telecommunications. The reliance on a national public interest standard does not properly address the interests of the community of states, industry and consumers and is not suitable to meet the aspirations of international space law. The international harmonization of frequencies and international standardization are indispensable for the introduction of these new services. The establishment of an international communications regulator with the power to adopt binding decisions if required is the most suitable way to address these problems. However, the development of an international public interest standard with clear policy objectives will be hard to achieve.
With regard to the different aspects of ground segment licensing, a gradual approach is the best way to balance the different interests and concerns in this field. The International Telecommunications Union GMPCS MoU and the development of European regulations show a feasible way to achieve a regulatory regime that facilitates the introduction of these new services. Lighter regulations, possibly the introduction of one stop shopping procedures, mutual recognition of licenses and the introduction of general authorizations are measures that can and should be taken at the international level. The interdependence of earth and space segment licensing may lead to the understanding that some aspects of earth segment licensing should also be regulated at international level.
The question will be whether States, industry and users are able to reconcile their interests and the sometimes opposing trends of international cooperation and international competition for the benefit of "all mankind".
Mendes, Luís Miguel Vinhas. "Measurements and analysis of spectrum activity." Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/7725.
Full textThe dissertation deals with measuring and analyzing spectrum occupancy of a GSM900 band, DCS1800 band and all UMTS bandwidth. A modelization for analog power and binary quantized power is given. In the case of analog power, histograms of the power distribution during one working day are presented. In the case of quantized power the two time statistics, the time period of opportunities distribution and the time between opportunities distribution are presented, described and modeled. The measurement setup is standing in line of sight with the base station. Also, in terms of maximum sensitivity the measurement setup is described and analyzed. Spectrum non occupancy in terms of total time for the GSM900 band and the DCS1800 band is given, for a working day.
Nesta dissertação são feitas medidas e a análise de ocupação de espectro em uma banda de GSM900, uma banda de DCS1800 e toda a largura de banda do UMTS. É apresentada uma modelização para potência analógica e para a potência binária quantizada. No caso da potência analógica são apresentados histogramas da distribuição de potência ao longo de um dia útil. No caso da potência quantizada as duas estatísticas, distribuição do período de tempo de oportunidades e distribuição do tempo entre oportunidades, são apresentadas, descritas e modeladas. O setup de medida encontra-se em linha de vista com a estação base. O setup é descrito e analisado em termos de máxima sensibilidade. A desocupação de espectro em termos de tempo total para a banda de GSM900 e para a banda DCS1800 é fornecida, para um dia de útil.
Van, Graan Sebastiaan Jan. "Network configuration improvement and design aid using artificial intelligence." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-08292008-170524/.
Full textChan, Francis Chun Ngai Electrical Engineering & Telecommunications Faculty of Engineering UNSW. "Statistical methods on detecting superpositional signals in a wireless channel." Awarded by:University of New South Wales. School of Electrical Engineering and Telecommunications, 2006. http://handle.unsw.edu.au/1959.4/30596.
Full textButkus, Kazimieras. "Objektų vietos nustatymo technologinių paklaidų įvertinimo sistema." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2008. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20080128_104821-95531.
Full textThis work investigates problem of positioning calculation error in mobile cellular networks and provides means to evaluate the errors in variuos aspects. Evaluation results are presented as generated geographical maps and values. The positioning calculation error evaluation is then used to extract requirements for engineered system. System is engineered in a way that it is cellular technology independand and is not limited by generations or carrier technologies of particular investigated networks. Resulting system allows users to select geographical area and precision of analysis to be carried on positioning calculation error. Radio signal propagation and coverage estimation algorithms are used to interpret input data and GIS data is used together to provide visual interpretation for positioning calculation error. This system is beeing used in real word aplications. At the time the system is used in MSC MPS R5 LBS, MPS112 platforms, also in solution „Bitės tinklo padengimo žemėlapiai“. Solution is universal, it can be used in variuos commercial network planning and LBS platforms. The system is cellular network technology neutral and it will be possible to evaluate future cellular or wireless networks as well.
Viljoen, Johannes Henning. "Modelling and optimal control of the market of a telecommunications operator." Diss., Pretoria : [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-09152004-100823.
Full textCampacci, Rodrigo Bellotto. "Handover vertical em redes NGN: integrando a sinalização do domínio de comutação de circuitos e o IMS." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/3/3141/tde-15092008-152814/.
Full textThis work intends to study and implement the integration between the circuit switching domain and the IP Multimedia Subsystem (IMS) to support vertical handovers that are between different access networks, such as Global System for Mobile communications (GSM) and WiFi. Therefore the specifications are incomplete about this topic in standards from the entities who works with this subject. Then, is presented a new proposal for this integration: a new functional entity to realize this integration: the Call Data Storage Function (CDSF), which interacts with other modules of VCC Service and guarantees that some information shared between modules are not lost, due to conversion of signalling protocols in the interface between domains. Besides that, CDSF helps in the control of allocation of reference address that are used to route calls from one domain to another. Access protocols to CDSF are defined and CDSF methods are exposed. The CDSF design uses a modular approach, which allows future improvements, just changing modules. As case studies to validate this work proposal, call scenarios are presented that uses the VCC Service, using CDSF. Finally, it is concluded that the integration between domains is viable if this work proposal is used. It is presented, as well, that the separation between control plans and data plans is one of the main contributions of NGN architecture to the success of its implementations, like IMS. Furthermore, it is exposed the advantages that VCC Service can aggregate to IMS, contributing for more rapidly adoption by telecommunications operators, considering that this service helps the networks integration, adding convergence, mobility and continuity.
Oliveira, Gabriel Diniz de. "Posicionamento relativo em tempo real e pós-processado utilizando microrreceptor GNSS usado em smartphone." Universidade Federal de Viçosa, 2014. http://locus.ufv.br/handle/123456789/3839.
Full textOver time has increased the need for low cost positioning of the populatio, and for this reason the demand for navigation devices has grown considerably in all levels of users of these devices, the population in general has greater access to smartphones because of its many features. Smartphones using micro GNSS receiver has a main component of positioning, where the pseudorange is its basic observable. The data sources for GPS corrections are increasingly available to the community through institutions as the IBGE with the Brazilian Network for Continuous Monitoring (RBMC). Thus, there is a greater possibility of improvement in accuracy of positioning these devices with the post- processed relative positioning and even in real time. With these possibilities and needs, this study aims the establishment of methodology that improves the accuracy in the positioning devices using micro GNSS receiver with a recursive least squares estimation with the Kalman gain matrix applied in relative positioning static by double difference of pseudorange in short baselines. To verify the effectiveness of this methodology is used SiRFstar IV micro receiver data which receives data only in L1 frequency GPS constellation. Was used reference RBMC stations to process these data. With tracking 15 minutes in known points had a mean deviation in the horizontal component of the plane coordinates 29 cm for post-processing and 98 cm for the real time processing, and, for the single point positioning average deviation was 6 meters. With this, it was concluded that the use of static methods for processing on recursive least squares estimation improves the accuracy of positioning significantly, where mobile devices that were previously given only to navigation may also be used for mapping.
Com o passar do tempo aumentou a necessidade da população em posicionamento a baixo custo, e por este motivo a procura por aparelhos de navegação tem crescido consideravelmente em todos os níveis de usuários. Destes dispositivos, a população no geral tem maior acesso aos smartphones devido a suas diversas funcionalidades. Os smartphones utilizam de microrreceptor GNSS como principal componente de posicionamento, sendo que sua observável básica é a pseudodistância derivada do código C/A. As fontes de dados para correções GPS estão cada vez mais disponíveis para a comunidade por meio de instituições como o IBGE com a Rede Brasileira de Monitoramento Continuo dos Sistemas GNSS (RBMC). Com isso, tem-se uma maior possibilidade de melhorias na acurácia do posicionamento destes dispositivos com o posicionamento relativo pós-processado e até mesmo em tempo real. Com estas possibilidades e necessidades, este trabalho tem como objetivo o estabelecimento de metodologia que melhore a acurácia no posicionamento de dispositivos móveis que utilizam microrreceptor GNSS, utilizando a estimativa de mínimos quadrados recursiva com a matriz de ganho de Kalman aplicada no posicionamento relativo estático por dupla diferença da pseudodistância em linhas de base curtas. Para verificar a eficácia desta metodologia utilizou-se dados do microrreceptor SiRFstar IV que recebe dados na frequência L1 da constelação GPS. Foram utilizadas as estações de referência da RBMC para o processamento destes dados. Com rastreios de 15 minutos em pontos de coordenadas conhecidas teve-se um desvio médio na componente horizontal das coordenadas planas de 29 centímetros para o pós- processamento e 98 centímetros para o processamento em tempo real, sendo que, para o posicionamento por ponto simples o desvio médio foi de 6 metros. Com isso, concluiu-se que a utilização da metodologia de processamento relativo estático por estimativa dos mínimos quadrados recursiva melhorou a acurácia do posicionamento de forma significativa, onde dispositivos móveis 14que até então eram indicados somente para navegação podem ser utilizados também para mapeamento.
Cesário, Júnior José Maria 1979. "Um medidor de energia elétrica integrado em redes de comunicações." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267697.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Tecnologia
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Resumo: A crescente evolução mundial dos sistemas de medição inteligentes, a liberação de regulamentações Brasileiras, incentivando a adoção de sistemas de medição de energia elétrica inteligentes, direcionaram a presente dissertação a propor um sistema composto de um equipamento eletrônico para medição, em tempo real, das grandezas de corrente, tensão e calcular a energia consumida e terá canais de comunicação com as tecnologias Wi-Fi, GSM/GPRS e GPS. As informações sobre consumo serão disponibilizadas para os usuários finais com o objetivo de mudar o padrão de consumo de energia elétrica, ou até reduzi-lo, através da conscientização e disponibilização das informações de consumo em tempo real
Abstract: The growing worldwide trend of smart metering systems, the release of Brazilian regulations, encouraging the adoption of smart electricity metering systems, guided this dissertation to propose a system composed of an electronic device for measuring, in real time, the magnitudes of current, voltage and calculate the consumed power and will have communication channels based on Wi-Fi, GSM /GPRS and GPS technologies. The consumption information will be made available to end users with the goal of changing the electricity consumption pattern, or even reduce it, through awareness and provision of consumer information in real time
Mestrado
Tecnologia e Inovação
Mestre em Tecnologia
Hraga, Hmeda I. "Modelling and design of compact wideband and ultra-wideband antennas for wireless communications. Simulation and measurement of planer inverted F antennas (PIFAs) for contemporary mobile terminal applications, and investigations of frequency range and radiation performance of UWB antennas with design optimisation using parametric studies." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/5668.
Full textGeneral Secretariat of Education and Scientific Research Libya
Hraga, Hmeda Ibrahim. "Modelling and design of compact wideband and ultra-wideband antennas for wireless communications : simulation and measurement of planer inverted F antennas (PIFAs) for contemporary mobile terminal applications, and investigations of frequency range and radiation performance of UWB antennas with design optimisation using parametric studies." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/5668.
Full textKruger, Pieter Jan Harm. "Cellphone banking at the bottom of the pyramid." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/19975.
Full textENGLISH ABSTRACT: This thesis investigate the di erent available GSM bearer channels that can be used to launch a cellphone banking application. Speci c attention is given to launch such a cellphone banking application to the so called \bottom of the pyramid". In South Africa, there are an estimate 11 to 13 million people with no bank accounts. The cellphone create an ideal opportunity to be used as a tool to reach this untapped market segment that today mainly uses cash to pay for day to day living expenses. The thesis provide more information on the cellphone banking arena in South Africa as well as certain projects in other parts of the world. The thesis also highlight new devel- opments on cellphone technology that include Android and IPhone delivery channels. Focus is placed on how the cellphone banking presentation layer must be delivered through the USSD GSM bearer channel. USSD is at the current moment the ultimate channel to consider due to its extensive reach and ability to work on any GSM cellphone handset. In conclusion, although cellphone banking can be used by any person, the bene t to bring nancial services to the bottom end of the pyramid must be considered to achieve nancial inclusion. The cellphone due to its reach is the ideal medium to access this lower end market.
AFRIKAANSE OPSOMMING: Hierdie tesis ondersoek beskikbare GSM selfoon kanale wat gebruik kan word om 'n selfoon bankdienste toepassing te initieer. Spesi eke aandag word gegee om so 'n selfoon bankdienste toepassing uit te rol na die sogenaamde onderste gedeelte van die bevolkings piramiede. Die tesis verskaf meer informasie oor die selfoon bankdienste arena in Suid Africa maar dit brei ook ooit oor sekere soortgelyke projekte in ander dele van die wereld. Die tesis lig ook nuwe ontwikkelings uit in selfoon tegnologie wat Android en IPhone mediums insluit. Fokus word geplaas op die selfoon bankdienste vertoning deur die USSD GSM kanaal. USSD is huidiglik die beste kanaal om te oorweeg as gevolg van die wydverspreide beskik- baarheid omdat die tegnologie op enige selfoon handstuk werk. Die uiteindelike gevolgtrekking uit die werkstuk is dat selfoon bankdienste deur enige persoon gebruik kan word, maar selfoon bankdienste is 'n goeie idee om te oorweeg om mense in te sluit uit die onderste gedeelte van die bevolkings piramiede. Die selfoon kan dus as 'n ideale medium gebruik word om hierdie mense te betrek by nansiele dienste.
Rizzo, Raffaela Gabriella. "Applicazioni GPS/GIS per la valorizzazione del territorio del consorzio di bonifica valli grandi e medio Veronese. La realizzazione di una guida mobile su PDA phone." Doctoral thesis, Università degli studi di Trieste, 2008. http://hdl.handle.net/10077/2557.
Full textIl lavoro di tesi è stato svolto con lo scopo di utilizzare le tecniche e gli strumenti dell’ICT (Information Communication Technology) assieme a quelle di posizionamento GPS (Global Positioning System) per realizzare un progetto di valorizzazione turistica e culturale di un territorio della bonifica, nello specifico quello delle Valli Grandi Veronesi. Quest’ultimo, nell’ottica della sostenibilità – ampiamente sottolineata nei documenti della Commissione Europea anche nel 2007 - rappresenta una delle poche aree rimasta da conservare in tutte le sue caratteristiche, proprio in una Pianura Padana altamente congestionata. Gli obiettivi posti sono stati due: 1)creare per il Consorzio dei materiali organizzati per una conoscenza tematica sul rapporto uomo – acque (interne e di bonifica) con attenzione alla valorizzazione dei relativi beni culturali e paesaggistici 2) realizzare una guida mobile dedicata per turisti "consapevoli" ed enti territoriali. La tesi si articola in un'introduzione, quattro capitoli, una conclusione, un'appendice e un allegato. - Introduzione Nell'introduzione si evidenziano gli obiettivi della ricerca e l'iter che ha condotto a sviluppare il tema della valorizzazione con tecniche ICT del comprensorio del Consorzio in base al rapporto uomo – acqua. Vengono presi in considerazione i soggetti (istituzioni, enti e privati) coinvolti nel lavoro, indicata la metodologia seguita nella realizzazione dello stesso e gli step intermedi raggiunti nell'arrivare alla realizzazione della guida mobile. Capitolo 1 – "ICT: mobile devices e guide mobili" Prende in considerazione il mercato dell'ICT (high tech) nell’ambito dei portable devices spiegando il perché della scelta di un PDA phone quale strumento per la realizzazione della guida suddetta. Essendosi soffermati sul settore della navigazione per auto, si fornisce una panoramica sulla composizione di un PND (Portable Navigation Device) e quale sia la differenza dello stesso rispetto ai PDA (Personal Digital Assistant) e ai PDA phone. Infine, nell'ultimo paragrafo (1.4 Le guide mobili) viene dato un riepilogo sulle diverse tipologie di guide mobili – con una possibile classificazione – ad oggi realizzate o in progress da enti e istituzioni. Capitolo 2 – "Gli studi propedeutici, anni 2004 e 2005: GPS, Mobile Mapping System e Laser Scanner" Descrive le diverse strumentazioni e tecniche (con i relativi esperimenti) presi in considerazione nell'arco di due anni (2004-2005): il Mobile Mapping System G.I.G.I.one dell'Università degli Studi di Trieste e il laser scanner terrestre; entrambi provati nella provincia di Verona. Questo per indicare l'iter che ha portato a orientarsi verso i portable devices per la navigazione quali strumenti per la localizzazione, rappresentazione e comunicazione degli aspetti salienti caratterizzanti un dato territorio. Capitolo 3 – "Il Comprensorio di Bonifica Valli Grandi e Medio Veronese" Il capitolo è interamente dedicato alla vasta area oggetto di studio descrivendone, in una prima fase, i caratteri generali per addentrasi poi sui lineamenti idrografici e sull’opera di bonifica che lo ha caratterizzato negli ultimi secoli, soffermandosi in particolare su come e perché si siano formate le Valli Grandi Veronesi, specificando anche qual è il ruolo del Consorzio di Bonifica nella gestione del territorio. Capitolo 4 – "Tecnologie ICT e mobile devices per la valorizzazione del territorio del Consorzio di Bonifica. L'itinerario di guida mobile nelle Valli Grandi: dal glossario della bonifica a un percorso nella bonifica" Indica quale sia stata la metodologia seguita nell'effettiva realizzazione dell'itinerario su PDA phone esplicitando le contemporanee fasi di lavoro su piattaforma desktop per ottenere, in aggiunta alla guida mobile, anche un'implementazione con finalità didattico/formative del SIT del Consorzio, attraverso la proposta di contenuti informativi turistico – escursionistici. In questo capitolo, il più articolato, si descrive come è stato rilevato il tragitto dell’itinerario con sistema GPS; si sia creato il database ValliGrandi.mdb; sia stato sviluppato il progetto GIS itinerarionellabonifica.mxd e come il tutto sia stato incluso nel PDA phone con i Geo Appunti e la traccia ValliGrandi.trc. Conclusioni Nelle conclusioni vengono esposte riflessioni sugli step compiuti, con una tabella riassuntiva delle operazioni che hanno coinvolto il concetto di punto di interesse e gli strumenti per effettuarle. Si esplicitano anche ipotesi di utilizzo/divulgazione del lavoro svolto. Appendice – Glossario L’itinerario realizzato ha come tematica il particolare rapporto uomo – acqua che si viene a creare in un ambiente quale quello della bonifica idraulica, ma con le peculiarità della bonifica in esame: quella delle Valli Grandi. Questo ha richiesto, oltre all'acquisizione della conoscenza dei luoghi, un apprendimento dei termini specifici della bonifica. Ecco perché si propone in allegato il glossario che, in fase di lavori, ha preso la forma di un itinerario tematico. Allegato – "L'itinerario di guida mobile nelle Valli Grandi Veronesi: cartografie e descrizione" Il allegato si propone l'itinerario in tre versioni: 1) un'iniziale breve esposizione dell'intero percorso, 2) una descrizione delle singole tratte sia generale sia con due esempi di dettaglio e 3) sei schede di singoli punti interesse a esemplificazione delle informazioni contenute del database ValliGrandi.md, informazioni riportate nella guida mobile su PDA phone. Oltre a questo sono state inserite quattro cartografie a corredo della descrizione e la copia del poster "Paesaggio e ICT: per un’iterazione positiva?" che riassume tutto il lavoro svolto.
The thesis concerns the tourist and cultural enhancement of the Valli Grandi reclaimed area in the province of Verona using ICT tools and techincs combined with the GPS ones. The targets aimed at are: 1) the production of organised materials for a thematic knowledge about the relation man – water paying attention to the enhancement of its cultural and landscape heritage; 2) the creation of a mobile guides for tourists and territorial institutions. The thesis describes in four chapters, one addendum (the reclaimed land glossary) and an attached document the steps followed to achieved the targets. Chapter 1 – "ICT: mobile devices and mobile guides" This chapter describes briefly the ICT market of portable devices and explains why the PDA phone has been chosen as the tool for the mobile guide of the Valli Grandi Veornesi. Telling this a possible classification of the nowadays known mobile guides has been given. Chapter 2 – "Preliminary studies, years 2004-2005: GPS, Mobile Mapping System and Laser Scanner" Chapter two concerns the preliminary studies that led to the choice of a potable navigation device to represent the territory, survey the itinerary and localise the point of interests. Chapter 3 – "The Consorzio di Bonifica Valli Grandi e Medio Veronese area" The Consorzio area is here described giving the perception of how it has transformed in a reclaimed through the centuries. The role and tasks of the Consortium are also explained. Chapter 4 – "ICT technologies and mobile devices for the enhancement of the Consorzio di Bonifica territory. The mobile guide itinerary through the Valli Grandi: from a reclaimed land glossary to a tour in the reclaimed land" It describes the methodology followed in the creation of the PDA phone itinerary explaining the simultaneous steps on desktop PC (to elaborate a tourist implementation of the already existing GIS of the Consortium) and on the PDA phone. It illustrates how the three projects ValliGrandi.mdb, ValliGrandi.trc and intinerarionellabonifica.mxd has been created. Addendum: Glossary It is the dictionary of the reclaimed land terms used in the Valli Grandi territory, terms that has become a tourist itinerary. Attached document This document describes the itinerary both in general and in particular parts. Examples of six point of interest cards are also included.
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Borselius, Niklas. "Multi-agent system security for mobile communications." Thesis, Royal Holloway, University of London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407884.
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