Dissertations / Theses: 'GSM'

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Glendrange, Magnus, Kristian Hove, and Espen Hvideberg. "Decoding GSM." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11089.

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We have participated in the creation of almost two terabytes of tables aimed at cracking A5/1, the most common ciphering algorithm used in GSM. Given 114-bit of known plaintext, we are able to recover the session key with a hit rate of 19%. The tables are expected to be unique as they provide the best coverage yet known to the authors, and they are the first step in a real-world passive attack against GSM. An initial investigation and analysis into the air interface of GSM were performed, from both a theoretical and practical point of view. These examinations would be essential in order to utilize the generated tables in a practical attack.Additionally, a rogue GSM network was built and deployed without enabling ciphering and frequency hopping. This active attack was purely based on open-source software and hardware, implying that real GSM networks could be spoofed with resources available to the general public.

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Cartemo, Henrik, and Tobias Ivehag. "GSM-baserat larm." Thesis, University West, Department of Technology, Mathematics and Computer Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-380.

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Suresh, Babu Kongaleti. "WCDMA in GSM." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18838.

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Multiple Access Techniques is the emerging techniques for the nextgeneration (3G) wireless communication systems. Multiple access techniques hasbeen designed to add features such as multimedia capabilities, high data rates andmulti-rate services to the existing wireless communication framework. The datarates proposed 2, 3 are 2Mbps indoor, 384 Kbps pedestrian, and 144 Kbpsvehicular. Several standards for third generation systems have been proposed anddeveloped by different industrial committees in countries such as the U.S, Europeand Japan. All the standards have accepted in one form or another as the multipleaccess method for wireless communications requirements.In this project, we study the implementation issues involved for one of theproposed multiuser channel estimation and detection algorithms for base-stations.It was found that these proposed algorithms for multiuser channel estimation anddetection have different processing and precision requirements.
Uppsatsnivå: D

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Trávníček, Tomáš. "Monitoring GSM sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217514.

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This master’s thesis is focused on problems of monitoring GSM network using a mobile phone. Problems are analyzed on a theoretic basis with a description of available network parameters. Then the thesis offers a description of existing application environments providing a user with given data about the network. The main part of this work describes a development of application compiling queue data from mobile network and GPS, and creates output data illustrating signal strength in selected areas. The work also includes extensive measuring in select areas together with an evaluation of the processed data.

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Persson, Patrik. "Positionering i GSM-nätverk." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-9619.

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Merparten av de kommersiella system för mobilkommunikation som finns och byggs i världen idag bygger fortfarande på GSM, antalet abbonnenter är över 2 miljarder. För att utöka funktionaliteten med mobila terminaler har det forskats på att införa positionering i GSM-nätverk. Tjänster som använder abbonnentens positionsinformation kallas Location Based Service och de ger möjlighet att utöka funktionaliteten och spara användaren av tjänsten arbete.

Rapporten beskriver olika tekniker för positionering och slutsatsen att CGI-TA är den teknik som positioneringen ska byggas på. Denna teknik finns tillgänglig hos de svenska operatörerna idag och för att kommunicera med dem används Mobile Location Protocol 3.0.0. Implementation av positioneringen realiserades i en J2EE-miljö i form av en WebLogic Server 8.1 med hjälp av Enterprise Java Beans och Java Connector Architecture. Prototypen verifierades med hjälp av en emulator till Ericsson Mobile Positioning System som klarar av att hantera Mobile Location Protocol 3.0.0.

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Oza, Tejas. "LCS Capable GSM Network." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256061.

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This thesis is about Location Based Services which intends to acquire the location of the mobile phone. The goal of our thesis project is to extend the Mobile Switching Centre and Base Station Controller with location based support which is a part of the Global System for Mobile Communications that follows the 3rd Generation Partnership Project standards and integrate with the Mobile Arts Home Location Register, Gateway Mobile Location Centre and Serving Mobile Location Centre. To achieve this goal the prototype of LCS capable GSM network will be implemented using the functional programming language Erlang/OTP and C programming language. Further for testing and verification, tests will be performed until in the final result the location of mobile phone is obtained.

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Pålstam, Simon. "Radio Localization with GSM." Thesis, Linköpings universitet, Reglerteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-132395.

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This thesis presents a feasibility study on unobtrusive localization of GSM en- abled cellphones using a Fake Base Station (FBS). An FBS is a radio transceiver that emulates the behaviour of a legitimate GSM Base Station (BS) to fool unal- tered cellphones to connect with it. This feasibility study investigates how an FBS can be utilized to estimate positions of connected cellphones in an area of interest. We present a proof of concept system that consists of a mobile FBS that measures the Time Of Arrival (TOA) and Received Signal Strength (RSS) to a cell- phone. The positions of the mobile FBS are determined with GPS. We employ calibration-free localization algorithms as we assume unknown environments and unknown hardware. Our experiments in an outdoor 180x100 m2 Line-Of- Sight (LOS) environment show that our calibration-free localization algorithms provide an average localization error less than 10 meters, which is sufficient for most applications of interest. In addition, our experiments show that RSS-based localization outperforms TOA-based localization when the average distance be- tween the FBS and cellphone is roughly 50 meters. Our experiments show that TOA-based localization outperforms RSS-based localization when the average dis- tance increases to roughly 75 meters. This research is part of the Smart Savannah project in which a wide range of different surveillance systems are developed to protect rhinos from poachers. We envision that our localization system can be used to detect and localize these poachers in an unobtrusive way. In addition, we envision that our localization sys- tem can be used in Search And Rescue (SAR) operations to estimate the positions of cellphones of missing persons.
Detta examensarbete undersöker möjligheten att lokalisera mobiltelefoner med GSM teknologi genom att använda en Falsk Basstation (FBS). En FBS är en radio transceiver som emulerar beteendet hos en legitim GSM basstation för att lura omodifierade mobiltelefoner att ansluta till den. Undersökningen tar reda på hur en FBS kan användas för att estimera positionerna av anslutna mobiltelefoner inom ett målområde. För att undersöka detta har ett Proof-Of-Concept-system ta- gits fram. Systemet består av en mobil FBS som som mäter propageringstid (TOA) och mottagen signalstyrka (RSS). FBS:ens positioner bestäms med GPS. Systemet använder kalibreringsfria algoritmer för lokalisering, då vi antar att miljön och mobiltelefonernas hårdvara är okänd. Tester av systemet har utförts utomhus i ett 180x100 m2 Line-Of-Sight-område. Dessa tester visar att lokaliseringsalgorit- merna ger ett genomsnittligt fel på mindre än 10 meter. Detta anses vara till- räckligt för de flesta tillämpningar av intresse. Utöver detta visar även testerna att RSS-baserad lokalisering ger bättre resultat än TOA-baserad lokalisering när medelavståndet mellan FBS och mobiltelefon är omkring 50 meter. TOA-baserad lokalisering ger däremot ett bättre resultat än RSS-baserad lokalisering när me- delavståndet ökar till omkring 75 meter. Denna undersökning är en del av Smart Savannah projektet som innefattar flera olika övervakningssystem, utvecklade för att skydda noshörningar från tjuv- skyttar. Målet med vårt lokaliseringssystem är att det ska kunna användas för att upptäcka och lokalisera tjuvskyttar utan deras vetskap. Vi tror även att lokalise- ringssystemet kan användas vid eftersökning- och räddnings-operationer för att lokalisera försvunna personers mobiltelefoner.
Project Ngulia

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Pavski, Johann Joachim. "Handover Optimization in GSM." Thesis, Linköpings universitet, Optimeringslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-123445.

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In telecommunications in general and in GSM in particular, the handover is a feature that guarantees a smooth transition of a call from one base station - that is for the purpose of this project an antenna - to another. In the recent ten years, the amount of data traffic through mobile telecommunications has doubled annually, putting an enormous strain on the network and forcing operators to upgrade with more and more base stations and new features. Although 3G and 4G are responsible for data traffic in most countries, GSM still provides more than 80% of the coverage for mobile devices around the world. Due to the increase in data traffic, 3G and 4G need to use more and more frequencies at the expense of GSM. An optimization of the GSM network is thus vital. In this project, we research two methods to automatically choose the parameters of interest (PoI) that govern the handover feature in each cell which is, roughly speaking, the area of coverage of one antenna. In one of these methods, the choice of cell- and cell-to-cell-specific parameters has its origins in control theory while the other method is based on mathematical optimization. In the mathematical sense, our goal is to optimize the quality of service over PoIs. Extensive simulations have been run using these PoIs in order to evaluate if and how the two different methods can effectively be used in reality. Several useful insights have been gained that will provide the basis for future work. The optimization approach in particular has proved to deliver good results within the limitations of the simulated environment used for testing.

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Bazzari, Ahmad. "Handover optimization in GSM." Thesis, KTH, Signalbehandling, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-175382.

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The current trend in the cellular networks to reduce the amount of spectrum dedicated toGSM networks put a burden on the radio access part to keep the promised quality of service.In addition to the focus of operators on other radio access technologies and data networkshave raised the need to direct most of the effort towards other activities. Subsequently newtechniques are needed to compensate for the lack of time and resources to keep GSMnetworks as optimized as possible.The handover functionality is in the heart of any cellular system. It is more important whendelay is not tolerated. Therefore, the choice of its parameters is important. These parametersare chosen based on network performance and traffic load patterns among other criteria. It isa time consuming task, and investigating in a way to automatically choose appropriatesettings for its parameters is desired.This work investigates the possibility of such an automated procedure. A simulationenvironment is developed in order to run simulations. An automated function that utilizesthe principles of control theory, optimization, and live networks statistics is developed andused to build an algorithm to regulate the settings of the handover procedure.By regulating four parameters from the handover procedure, and by introducing differenttraffic loads, frequency reuse and mobility patterns, while testing the results against a set ofperformance metrics in the simulator. The results show better network performance in termsof performance metrics when the regulating algorithm is applied than when manuallychoosing values of these four parameters. However, further investigation shows that thealgorithm under an aggressive mobility pattern imitating a high speed moving users, mightneed a stopping rule. The algorithm tries to find a better network performance even if thecurrent metrics are acceptable. This appears to be invalid approach under some aggressivemodels.

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Beníček, Martin. "GSM alarm pro motocykly." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217809.

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The main target of this work is to design and to implement unfailable safety appliance for motocycles with use any GSM technology. In my masters’s thesis I applied to individaul fields which I had to knows for realization of this work. The introductory chapter tells the reader about evaluation of former semestral projects and about brief description of the realized mechanism. It is followed by descripctoin of principles of communication between PC and mobile phone. The main part of my work is dedicated to application itself. The applicaton is called motoalarm. The last chapter creates description service of localisation mobil phones which is called Kde je... The conclusion includes evaluation of this master´s project and general description of the realized mechanism.

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Snížek, Milan. "Ovládání vytápění přes GSM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217841.

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This diploma thesis deals with heating control over GSM network with the goal to design and realize HW include programs for microcontrollers. The whole system consists of two units, the GSM units and the thermostat. Compared to the assignment the functions of the GSM unit were extended. Now the GSM unit contains other inputs and outputs what significantly increases usage and number of applications. These inputs and outputs can be used for example for connecting alarm system and remote control of other devices. The thermostat is programmable and allows manual control by four button and LCD character display and it also can be controlled via RS485. Both units have been successfully realized and tested.

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Johansson, Emil, and Kim Myhrman. "GSM/WCDMA Leakage Detection System." Thesis, Linköpings universitet, Elektroniksystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-66963.

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Ericsson in Linkoping houses one of the largest test laboratories within thewhole Ericsson Company. Mainly, the laboratories contain equipment forGSM, WCDMA and LTE. To test these systems, a quite large number ofRadio Base Stations are needed. The RBS's are housed in a proportionatelysmall area. Instead of sending signals through the air, cables are used totransfer the RF signals. In this way the equipment communicating witheach other are well speci ed. However this may not be the case if leakageoccur.This thesis work is about developing a system for monitoring the radioenvironment and detect leakages in the test site. There is a need to de newhat a leakage really is and measurements needs to be performed in order toaccomplish this. This report describes how the work has proceeded towardsthe nal implemented solution.

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Корольов, М. М., Ю. М. Салій, and І. П. Бурик. "Дистанційне (GSM) керування ВУП-5М." Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/21444.

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Kadaňka, Karel. "GSM brána pro PLC systémy." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-401963.

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The master´s thesis describes the initial design of communication module for industrial automation purposes which can transmit short status messages via the GSM network informing about the status of the connected device to a predefined telephone number. In the first part, the communication protocols are describe and a market survey is carried out. Then follows the evaluation of the market survey and the justification of construction of the device. The following chapters are devoted to the description of the device being developed, its individual components and program description and testing prototype.

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Silva, Vanessa Sérgio da. "Sistemas de M2M utilizando GSM." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/5602.

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Mestrado em Engenharia Electrónica e Telecomunicações
Com 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.

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Pavliš, Jaroslav. "Přenos pacientských informací pomoci GSM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217737.

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This diploma thesis is concerned with possibilities of patient data transfer from a pacemaker or implantable cardioverter-defibrillator to physician over GSM. Theoretical part describes options of data transfer in GSM networks, data appropriate for sending and a structure of message is proposed. A device, that is able to send medical data in a form of SMS messages is designed and constructed. The device uses a Freescale MC68HC908GP32 microcontroller, character display with a Hitachi HD44780 controller and a cell phone Sony CMD-J70. The program for microcontroller is written in assembler for HC08. For tabular view of received messages, an application software for PC was created.

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Charvát, Jiří. "Experimentální rušička pro GSM sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-218024.

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This thesis describes GSM communication, the method of its jamming and design of a jammer for this band. This document is mainly focused on design of the jammer with the variable bandwidth of jamming and the variable level of output power. Requested parameters of jamming are set by a control panel with a LCD display. In this document there is a detailed description of each function block and connection between them. At the end of this thesis there are released measured results of designed jammer.

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Prečan, David. "Komunikační zařízení přes GSM/GPRS." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218345.

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This master thesis deals with a data remote transmission by means of SMS and GPRS technology. The overview of current solutions is presented and then a remote temperature measurement and a data transmission employing a communication module GSM/GPRS TM1 through GSM network using GPRS technology is described. As a response to an impulse, the communication module sends SMS. The technical solution is described in details including HW and SW design of the data transfer and processing equipment using a ATmega 162 microprocessor. This equipment communicates with a server (PC), which displays the measured temperature. A prototype which was used for a validation of the design is also described.

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Månsson, Jonas. "Principles for Channel Allocation in GSM." Thesis, Linköping University, Department of Electrical Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10697.

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In today's GSM system there is a complex resource situation when it comes to the scarce TDMA channels in the air interface, the time slots. There are both voice call services that use one or a half time slot and there are packet data users, that may share time slots with other packet data users, and they can use multiple channels at the same time. Allocating time to users is a crucial part in the system and it may affect the performance for the end user substantially.

In the future there may be more types of services than just voice and packet data and that these services may have specific demands on their channels, time slots. That means they would not be able to use just any of the available channels. The way to "give" services channels is what is called channel allocation. In this thesis four different services and three different principles for channel allocation is implemented in a Matlab simulator and simulated. The thesis goal is to determine which principle is best for which mix of services.

The principles that have been investigated are Flexible Algorithm that lets all services use all channels, Fix Dedication Algorithm where all channels are dedicated to a service and only can be used by that one and finally Soft Dedication Algorithm where all channels are dedicated to a service but may be used by other services when it is not needed by the preferred one.

The conclusion is, simplified, that the Soft Dedication Algorithm generates low blocking rates, high bandwidth and that it is a quite robust principle although the borrowing user may be preempted. It may not always be the best one but over all it is the one to prefer.

Detta examensarbete är utfört på uppdrag av och i samarbete med Ericsson och rör kanal- och resurshantering i GSM-systemet.

Ett ständigt problem vid trådlös och mobil kommunikation är den begränsade mängd frekvenser som finns tillgängliga i radiogränssnittet och hur pass nära två radioresursers frekvenser kan ligga varandra. I GSM används TDMA (Time Division Multiple Access) för att få plats med många användare på ett smalt frekvensband. TDMA innebär förenklat att tiden delas upp i åtta tidsluckor och att varje användare får tillgång till en av radioresurserna under en sådan tidslucka (kanal). Detta gäller både i upp- och nedlänk.

I nuläget finns två tjänster, paketdata och tal, som använder tidsluckorna på olika sätt. En talanvändare använder en eller en halv lucka själv medan paketdataanvändare kan dela på en eller flera luckor. Det finns alltså en mängd olika sätt att allokera, "dela ut", dessa luckor till ett givet antal användare. I nuläget har man en väl fungerande algoritm för detta men man tror att det i framtiden kommer att finnas fler tjänster med mer specifika krav på sina tidsluckor (kanaler) och att man då inte längre kan använda samma princip för kanalallokeringen.

I detta exjobb har tre nya, enkla och renodlade principer för kanalallokering undersökts för fyra fiktiva tjänster. Det tre principerna är Flexible Algorithm, där alla tjänster tillåts använda alla kanaler, Fix Dedication Algorithm, där alla kanaler är dedicerade till någon tjänst och endast kan användas av just denna tjänst; och slutligen Soft Dedication Algorithm som fungerar liknande den föregående men här kan tjänster "låna" kanaler av andra tjänster så längs som de är lediga. I Soft Dedication Algorithm kan en eventuell "låntagare" bli avbruten om en användare av rätt tjänst inte hittar en ledig kanal.

Utvärdering har skett genom att simulera systemet i en, delvis egengjord, Matlabsimulator.

Resultaten visar, förenklat, att Soft Dedication Algorithm är den bästa vad gäller låg blockering, kanalutnyttjande och även bandbredder. Den är även förhållandevis robust mot variationer i last.

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Hellström, Nils. "Fleet Management Services in GSM-modules." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8539.

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This report studies a low cost hardware platform for Fleet Management Services, FMS. The platform manages vehicle data, positioning and wireless communication. The core of the platform is a new kind of ‘intelligent’ GSM modem, called a GSM module. A GSM module is basically a stripped down mobile phone that allows embedded third party application code and has an IP-stack. The report reviews the modules available on the market today and presents experiences from the implementation of a prototype based on the Aplicom A12 module. The main conclusion is that the concept is feasible though the modules' limited performance must be considered in the design.

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Bjørnstad, Torstein. "Using GSM SIM Authentication in VPNs." Thesis, Norwegian University of Science and Technology, Department of Telematics, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-8724.

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With the growth of the Internet a lot of different services has emerged. These services are often accompanied by some kind of security system. Since most of these services are stand-alone systems, a whole range of different authentication systems have been developed. Each using one of several kinds of authentication, with one or more proofs of identity. The SIM card used in mobile phones is an identifying token, containing strong authentication mechanisms. If services could utilize the SIM for authentication it would provide both a more secure solution, in addition to increased simplicity for the user. This master thesis builds on a project that investigated how the security properties of a system can be improved by adding an extra factor to the authentication process - something the user has, or more specifically the GSM SIM card. That project concluded by suggesting an overall design for a VPN Authentication System based on the security mechanisms in GSM. This thesis continues that work by analyzing that design, and describing the implementation of a prototype utilizing the mechanisms available.

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Sehovic, Faruk, and Martin Åberg. "Betalsystem för Inteli3 GSM roaming plattform." Thesis, Växjö University, School of Mathematics and Systems Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-1642.

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Vår uppgift är att sammansätta en produkt som skall sänka de så kallade ”Roaming”

avgifterna som uppkommer då ett telefonsamtal måste resa eller ”roama” genom flera olika

operatörers mobilnät. För att sänka denna kostnad har ett företag vid namn ”CallKey Group

Ltd” tagit fram en produkt, ”CallKeyOne” som är en lösning baserat på GSM SIM-kort.

CallKeyOne kommer att reducera kostnaden för utgående samtal radikalt och att motta samtal

blir gratis i de flesta länder. Detta leder ofta till en reducerad kostnad med upp till 70 %.

Uppgiften för författarna av denna rapport var att integrera CallKey: s API med en

webbaserad betalsida vid namn PayNova. Den färdiga produkten ska bli en fullt fungerande

produkt som tillåter kunderna att fylla på sitt SIM-kort med förbetald kredit för internationella

samtal. Till uppgiften hör även att skapa en databas där information om överföringar och

kunder skall lagras. Kunden ska kunna betala via kreditkort och pengarna ska sedan överföras

till uppdragsgivarna. Uppgiften har utförts med hjälp av ByAir AB som är ett svenskt företag

med kontor i Göteborg som har licensen för CallKeyOne i Sverige.

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Bian, Kai. "Sub-CellID based GSM location system." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1636519.

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Kuropatwiński-Kaiser, Wojciech. "MIMO-Demonstrator basierend auf GSM-Komponenten /." Karlsruhe : Inst. für Nachrichtentechnik, 2005. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=014885683&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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Nordzell, Andreas. "Double Differential TOA Positioning for GSM." Thesis, Linköpings universitet, Kommunikationssystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94162.

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For most time-based positioning techniques, synchronization between the objectsin the system is of great importance. GPS (global positioning system) signalshave been found very useful in this area. However, there are some shortcomingsof these satellite signals, making the system vulnerable. The aim of this masterthesis is to investigate an alternative method for synchronization, independent ofGPS signals, which could be used as a complement. The proposed method takesadvantage of the broadcast signals from telecommunication towers, and use themfor calculation of the synchronization error between two receivers. By looking atthe time difference between arrival times at the receivers, and compare it to thetrue time difference, the synchronization error can be found. A precondition isthat the locations of the receivers as well as the tele tower are known beforehand,so that the true time difference can be calculated using geometry.The arrival times are determined through correlation between the received signalsand known training bits, which are a part of the transmission sequence. Forverification, experiments were made on localization of a mobile phone in theGSM (global system of mobile communications) network.This researchwas a collaboration with FOI, the Swedish Defense Research Agency,where most of the work was done.

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Chaladauskas, Mindaugas. "GSM LPC komponento realizavimas ir tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100813_113026-64398.

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Kiekvienas, kuris kuria aparatūrinę įrangą, nori, tai atlikti kiek įmanoma greičiau ir už kuo mažesnius kaštus. Gaminys turi greitai patekti į rinką, nes egzistuojanti konkurencija yra labai didelė. Tai galima padaryti naudojant specialią programinę įrangą, vadinamus aukšto lygio sintezės įrankius. HLS įrankiai automatiškai generuoja HDL RTL aprašą bei padeda projektuotojams turėti visas galimas projekto architektūras. HLS įrankiai naudoja algoritminį C aprašą kaip įvesties duomenis. Čia atsiranda galimybė PĮ inžinieriams taip pat projektuoti aparatūrinę įrangą. Nors atrodo, jog HLS technologija yra labai gera, bet šie įrankiai šiandien plačiai nėra naudojami. Turi būti surasti problemu sprendimai. Šioms problemoms spręsti atliekamas eksperimentas. GSM LPC algoritmas rankiniu būdu perrašomas iš C kalbos aprašo į VHDL RTL. Eksperimentas paaiškina aukšto lygio sintezės problemas. Norint, kad HLS įrankiai būtų plačiai naudojami, aukšto abstrakcijos lygio C/C++ aprašas turi būti rašomas su atitinkamais apribojimais. Neturi būti naudajami rodyklės tipo kintamieji, rodyklės tipo kintamųjų aritmetikos, rekursijos, sudėtingų operacijų, dinaminio atminties rezervavimo. Projektuotojai turi mąstyti taip kaip aparatūrinė įranga.
Everyone who develops hardware wants to do this as fast as possible and for low costs. Time to the market must be shortened because the competition is very substantial. This can be done by using special development software called high level synthesis tools. HLS tools automatically generate HDL RTL code and helps developers to get all possible architectures of project. HLS tools use an algorithmic C code as input information. There is the possibility for software engineers to develop hardware too. It seems that HLS is very good technology, but HLS tools are not widely used today. It must be found the reasons of this problem and opportunities how this problem can be solved. An experiment is made by solving this problem. A GSM LPC algorithm is written by hand from C description to VHDL RTL. This experiment explains problems of high level synthesis. With the purpose HLS tools to use widely, high level of abstraction (C/C++) code must be written with restrictions. There must be no pointer variables and pointer arithmetic, no recursion, no difficult operations, no dynamic memory allocation. Engineers have to think like hardware.

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Mahesar, Fayaz Ahmed. "Dynamic Channel Allocation in GSM Network." Thesis, Blekinge Tekniska Högskola, Avdelningen för telekommunikationssystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-1234.

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The rapid evolution of cellular technology and the more user demand for advanced mobile services leads the industry to develop more efficient network structures. The increasing number of cellular subscribers and the demand for cellular networks communication (3rd and 4th generation) drives to the research of the new methodologies for the design of cellular networks and services. This thesis has been generated and complied with the objective of proposing GSM Network Utilizing DYNAMIC CHANNEL ALLOCATION starting with the architecture of GSM Network with system design. In next chapter we define the channels that are transmitted over the Air Interface, leading further towards the Channel Allocation Schemes in GSM. In this chapter we describe the various types of channels are used in GSM Network. Furthermore define the main two strategies for channel assignment, briefly differentiate between the FCA (Fixed Channel Allocation) and (Dynamic Channel Allocation) as well as advantages of both schemes. Then the major is study of (Dynamic Channel Allocation) and the proposed Algorithm for Dynamic Channel Allocation in GSM network is presented and discussed. All channels will placed in a pool and on demand or on request will be assigned to the user for that particular call that will be helpful to maintain the grade of service and increase system capacity.

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Chmieliauskas, Darius. "GSM ląstelės savaiminio susikonfigūravimo algoritmo kūrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140610_100258-37957.

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Baigiamajame magistro darbe kuriamas 2G mobiliojo ryšio ląstelės savaiminio susikonfigūravimo algoritmas. Sukurtas algoritmas geba automatiškai ir autonomiškai parinkti transliacinio kanalo dažnį ir pasiūlyti potencialių kaimyninių ląstelių sąrašą. Visų pirma, apžvelgiamos mobiliojo ryšio tendencijos Lietuvoje ir pasaulyje. Taip pat įvertinamos SON panaudojimo galimybės ir šio tipo tinklų naudojimo privalumai operatoriui ir klientui. Toliau kuriami automatinio transliacinio kanalo pasirinkimo ir kaimyninių ląstelių sąrašo sudarymo algoritmai. Šie algoritmai kuriami remiantis spektro analizės metodais: energijos detekcija ir ciklinių pasikartojimų aptikimu. Transliacinio kanalo atpažinimas atliekamas naudojantis dažnio korekcijos kanalo aptikimu. Šokinėjančio dažnio duomenų kanalas atpažįstamas pagal energijos išsibarstymą laike. Pasiūlytas algoritmas yra testuojamas naudojant USRP SDR platformą. Testai atliekami vertinant vieno iš Lietuvos operatorių GSM tinklo ląsteles. Sukurtas algoritmas geba tinkamai įvertinti kanalus kurių signalo lygis žemesnis nei -105dBm, o SNR žemesnis nei -5dB. Remiantis šiais įverčiais siūlomas algoritmas geba parinkti optimalų transliacinio kanalo dažnį ir pasiūlyti korektišką kaimyninių ląstelių sąrašą. Darbą sudaro: 1. Įvadas. Užduoties analizė. 2. Mobiliojo ryšio SON technologijų apžvalga. 3. Savaiminio susikonfigūravimo algoritmo sudarymas. 4. Savaiminio susikonfigūravimo algoritmo eksperimentinis tyrimas USRP SDR platformoje. 5. Rezultatų... [toliau žr. visą tekstą]
Self-configuration Algorithm for GSM Cell is designed. Developed algorithm is able to choose frequency for broadcast control channel and propose list of potential neighboring cells automatically and autonomously. Firstly, mobile communications tendencies in Lithuania and world are reviewed. Main drivers and benefits for operators and customers to use SON technologies are evaluated. In following chapter broadcast channel frequency and neighboring cells selection algorithms are developed. Design of these algorithms is based on spectral analysis techniques: energy detection and cyclostationarity detection. Broadcast control channel identification is performed using frequency correction channel detection. Frequency hopping channel is identified by energy dispersion. The proposed algorithm is tested using USRP SDR platform. During the tests GSM cells of one mobile operator are evaluated. The algorithm is able to properly recognize the channels whose signal level is lower than -105dBm, and SNR is lower than -5dB. Using those evaluations algorithm is able to choose optimal broadcast channel frequency and suggest correct neighbor cells list. Master thesis contents: 1. Introduction. Analysis of the problem. 2. Mobile SON technology review. 3. Design of Self-configuration Algorithm. 4. Test of Self-configuration Algorithm in USRP SDR platform 5. Summary of Results. Thesis consists – 75 p. text without appendixes, 39 illustrations, 8 tables, 27 references.

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LUIZ, BRUNO MAIA ANTONIO. "GSM COVERAGE SYSTEM PLANNING WITH REPEATERS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2002. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=3023@1.

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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO
Este trabalho aborda a utilização de repetidores na implantação de sistemas móveis celulares. Esta técnica permite estender a cobertura dos sistemas móveis celulares com baixo custo e curto tempo de implantação a áreas ou ambientes onde a utilização de estações rádio base seria dispendiosa ou demorada.O impacto da inclusão deste elemento na interface rádio é detalhadamente analisada visando obter uma metodologia para o seu dimensionamento e para o cálculo das degradações produzidas na rede. É apresentada ainda uma metodologia completa para projetos com repetidores e descrita sua aplicação na implantação de um sistema GSM.
This work deals with the use of active repeaters in the planning and deployment of cellular mobile systems. This technique allows the extension of the coverage of the cellular systems, with low cost and short building time, to areas where the use of radio base stations would be costly or difficult to implement.The impact of the inclusion of the active element in the radio interface is analyzed in full detail to provide methods for the calculation of the degradations produced in the network. A complete design methodology for projects with repeaters is also presented, as well as a case study for a GSM system.

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Салій, Ю. М., and М. Корольов. "Охоронна система на основі GSM модуля." Thesis, Видавництво СумДУ, 2010. http://essuir.sumdu.edu.ua/handle/123456789/21076.

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Метою нашого дослідження є розробка простої і надійної ситеми, яка повинна бути доступною кожному. Для цього використали GSM модуль. Система призначена для передачі даних на будь-яку відстань, і ця відстань обмежується тільки покриттям мережі. При цитуванні документа, використовуйте посилання http://essuir.sumdu.edu.ua/handle/123456789/21076

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Павленко, Богдан Вікторович. "Системи безпеки, які використовують GSM канали." Bachelor's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/39324.

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У дипломній роботі проводиться порівняння різних безпровідних технологій, детально розглянутий принцип побудови GSM- каналу в системах охорони, GSM порівнюється з іншими безпровідними технологіями. Проведений огляд декількох основних безпровідних систем охорони, на їх прикладі був проведений аналіз його використання в різних системах охорони. Проведений аналіз функціонування систем безпеки, які використовують GSM канали, розглянуті принцип шифрування, завадостійкість та завадо-захищеність у GSM-каналі. Сформульовані декілька основних принципів та рекомендацій по використанню GSM-каналу в системах охорони. Зазначені основні шляхи розвитку мереж GSM. Представлений один із можливих варіантів розрахунку зони покриття окремо взятої базової станції.
A comparison of different off-wire technologies, principle of construction of GSM considered in detail, is made in diploma work - to the channel in the systems of guard, GSM is compared to other off-wire technologies. Conducted review of a few basic off-wire systems of guard, on their example there was the conducted analysis of his use in the different systems of guard. Conducted, analysis of functioning of the systems of safety that use GSM the channels considered principle of enciphering, noise immunity and noise protection in GSM- channel. Several basic principles and recommendations for the use of GSM-channel in security systems are formulated. The main ways of development of GSM networks are indicated. One of the possible options for calculating the coverage area of a single base station is presented.
В дипломной работе проводится сравнение различных беспроводных технологий, подробно рассмотрен принцип построения GSM- канала в системах охраны, GSM сравнивается с другими беспроводными технологиями. Проведенный обзор нескольких основных беспроводных систем охраны, на их примере был проведен анализ его использования в различных системах охраны. Проведенный анализ функционирования систем безопасности, использующих GSM каналы, рассмотрены принцип шифрования, помехоустойчивость и помех-защищенность в GSM-канале. Сформулированы несколько основных принципов и рекомендаций по использованию GSM-канала в системах охраны. Указаны основные пути развития сетей GSM. Представлен один из возможных вариантов расчета зоны покрытия отдельно взятой базовой станции.

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Rybár, Vladimír. "Řízení pohonu kalového čerpadla přes GSM." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2019. http://www.nusl.cz/ntk/nusl-400625.

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The topic of the final thesis is the project and realization of the pump control using GSM. The present (actual, current) state of control unit of irrigation system is analyzed in the introduction of this thesis. The core of this thesis is to design new controlling irrigation system with using GSM control. In this thesis there are selected suitable (appropiate) components, which are meeting the assigment. After that, the control program was designed. The conclusion of the thesis is to verify the functionality of designed system, to summarize achieved the result and to summarize the possibilities of the system expansion options.

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Kalus, Jiří. "Podpora GSM alarmu na mobilním zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2011. http://www.nusl.cz/ntk/nusl-412843.

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This master's thesis describes the mobile application that provides the support to control the GSM/GPS alarms. Based on the possibilities of modern security equipment and mobile devices, the application adds new functionality for these alarms. This work mainly describes selecting the appropriate mobile platform, application designs and the independence on the specific alarm. In conclusion, the results and possible extension of the application are talked over.

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Eckhoff, Irina, and Ala Eddin Al-Qut. "GSM Personal Alarm for Crisis Situations." Thesis, Malmö högskola, Teknik och samhälle, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20037.

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Patienter med olika sjukdomar kan svimma eller tappa medvetandet och behöver akut hjälp. De kan inte veta i förväg att de kommer att behöva hjälp. Det finns trygghetslarm men kommunikationen och tekniken hos sådana larm är mycket begränsad. Denna rapport beskriver ett examensarbete där vi utvecklade en prototyp till en produkt, GSM personlarm. Prototypen övervakar kontinuerligt patientens puls och om pulsen överstiger eller understiget värdet som anges av en läkare skickas ett SMS-meddelande till en larmmottagare som kan skaffa hjälp. Systemet fungerar lika bra i bostaden som utomhus. Den utnyttjar GSM-nätet och på så sätt ökar kommunikationsräckvidden.
Patients with different diseases may faint or lose consciousness and require emergency assistance. They cannot know in advance that they will need help. Today, there are security alarms but communication and technology of these alarms have very limited functions. This report describes a final year project where we developed a prototype of a product, GSM- personal alarm.The prototype continuously monitors the patient's pulse and if the pulse is greater than or less than the threshold values specified by the doctor, the alarm system will send an SMS message to an alarm help receiver. The system works equally well at home or outdoors. It uses the GSM network and thus increases the communication range.

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Bhatta, Abhishek. "GSM based Communication-Sensor (CommSense) System." Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28436.

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Using communication signals for radar applications has been a major area of research in radar engineering. In the recent years, due to the widely available wireless signals, a new area of research called commensal radars has emerged. Commensal radars use available wireless Radio Frequency (RF) signals to detect and track targets of interest. This is achieved by placing two antennas, one towards the transmitting base station and the other towards the surveillance area. The signal received by these two antennas are correlated to determine the location and velocity of the target. When a signal passes through a channel, it reflects off the obstacles within its path. These reflections usually degrade quality of the signal and cause interference to the telecommunication systems. To mitigate the effects of the channel on a signal these systems transmit a known bit sequence within each frame. Our goal, with this thesis, is to design and implement a working prototype of a novel architecture for the commensal radar system, which uses these known bit sequences to extract the channel information and determine events of interest. The major novelties of the system are as follows. Firstly, this system will be built upon existing communication systems using Software Defined Radio (SDR) technology. Secondly, this design eliminates the need for a reference antenna, which reduces the cost of the system and creates an opportunity to make the system portable. We name this system Communication-Sensing (CommSense). Since, our plan is to use Global System for Mobile Communication (GSM) as the parent system for the prototype development, we decide to update the name to GSM based Communication-Sensing (GSM-CommSense) system. This thesis begins with theoretical analysis of the feasibility of the GSM-CommSense system. First of all, we perform a link budget analysis to determine the power requirements for the system. Then we calculate the ambiguity function and Cram´er-Rao Lower Bound (CRLB) for a two-path received signal model. With encouraging theoretical results, we design a prototype of the system that can capture real GSM base station broadcast signals. After the design of the GSMCommSense system, we capture channel data from multiple locations with varying environmental conditions. The aim for this set of experiment is to be able to distinguish between different environmental conditions. Then, we performed statistical analysis on the data by means of Probability Density Function (PDF) fitting, a goodness-of-fit test called chi-square test and a clustering algorithm called Principal Components Analysis (PCA). We have presented the results from each analysis and discussed them in detail. Upon, receiving positive results in each step we have decided to move towards using learning algorithms to categorise the data captured by the system. We have compared two widely accepted supervised learning algorithms, called Support Vector Machines (SVM) and Multi-Layer Perceptron (MLP). The results showed that with the current hardware capabilities of the system and the amount of data available per GSM frame, the performance of SVM is better than MLP. Thus, we have used SVM to classify two events of detection and classification across a wall. We have presented our findings and discussed the results in detail. We conclude our current work and provide scope for future work in development and analysis of the GSM-CommSense system.

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Deshpande, Nikhil. "Matlab implementation of GSM traffic channel." [Tampa, Fla.] : University of South Florida, 2003. http://purl.fcla.edu/fcla/etd/SFE0000167.

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Benýšek, Jiří. "Vazba GSM modemu na PBX Asterisk." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218255.

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Short Message Service (shortly SMS) is the most widely used type of communication systems. The main advantages are that allow a fast exchange of messages between devices, a very good availability through GSM and a reasonable price. Nowadays the SMS service support has expanded to include other technologies such as a service of the information navigation and the remote connection. The master‘s thesis concentrates on the Short Message Service, deals with basic principles and statements using by this service. The topic of the thesis is software PBX Asterisk and its possibility of SMS implementation, especially verification of SMS processing goes through the PSTN. After the basic introduction the master‘s work deals with the installation and configuration of the server. The main focus is on an installation of the operating system with an additional pack including necessary libraries and modules for a correct working of the server. The following section is paying attention to the Asterisk server configuration, especially a hardware card installation which is necessary for a connection with analog telephones, done by Bluetooth connections, set up user’s profiles of the SIP protocol and create a dial plan. This is followed by a verification of SMS option of the implementation and communication with GSM modem which is used as a gate for an exchange SMS between PSTN and GSM network. The last chapter of this master‘s thesis comes with the aimed results.

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Pristach, Marián. "Lokalizátor s ovládáním přes GSM rozhraní." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218416.

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The objective of the diploma thesis is to design a device for positioning of mobile devices using GPS satellites. When coordinates are acquired they can be sent via the GSM network to a user's cell phone or to an SQL server. A web interface has been designed to access the stored data and to show the current device position and the history. This position datalogging system can be used for monitoring vehicles as well as a security system for cars.

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Vondra, Marek. "Měření kvality a dostupnosti GSM sítě." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219098.

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The thesis is specialized on a possibility of measuring qualities and availability of a cellular radio system and also on evaluation qualities, fruitfulness interface, permeability etc. It includes short description of a basic mobile technology. Further analysis of the possibility of measuring the mobile network and how implement the measure. It also includes a draft program for measuring and evaluation of the GSM network with help several tests by a mobile phone connected through the Bluetooth.

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Kollár, Marcel. "Návrh antény PIFA pro GSM pásma." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-219167.

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The main topic of this diploma thesis is a design of the PIFA antenna working in GSM bands. In the beginning there is a brief analysis of planar antennas. The thesis describes PIFA antenna and the techniques for minimization of dimensions of the antenna. Essential part of the thesis is dedicated to multicriterial optimalizaton of the antenna shape. The genetic algorithm programmed in the MATLAB enviroment cooperates with a full-wave solver CST to obrain desired impedance matching of the antenna its radiationt paterns. Also dimensions of the antenna can be minimized using the optimization procedure. Final part of the thesis compares measured data of the optimalized antenna with results obtained in CST Microwave Studio.

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Ďurík, Maroš. "GSM monitorovací systém pro staré lidi." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220706.

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The work deals with design of system for monitoring elderly people. The final product of this thesis will be used to ensure protection of old person´s health. The device will also remind water regime, taking of medicine, measure gas concentration and it will make an emergency call or send an emergency SMS. It will inform an old person about time and date and it will also be working in case of power fail.

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Клок, О. В. "Система передачі даних на базі GSM/GPRS пристроїв." Master's thesis, Сумський державний університет, 2018. http://essuir.sumdu.edu.ua/handle/123456789/71432.

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У ході виконання кваліфікаційної магістерської роботи було розроблено систему передачі даних для GSM/GPRS пристроїв. Був розроблений алгоритм роботи пристрою, структурна і принципова схеми. Отриманий пристрій володіє основними властивостями, притаманними сучасним GSM модемам: високою продуктивністю і надійністю, простотою виконання, досить низькою ціною

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Han, Bao Min. "Tourist platform based on GSM location system." Thesis, University of Macau, 2006. http://umaclib3.umac.mo/record=b1636533.

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Wiselyn, Jeyapaul Ebby. "GSM Voice Mail Service TDM Call Control." Thesis, Uppsala universitet, Institutionen för informationsteknologi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-189242.

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The Voice Mail Service (VMS) enables forwarding of calls to a dedicated Voice Mail Server (VMS) on behalf of the call receiving subscriber during certain conditions such as 'busy subscriber', 'no answer', 'always', etc. The standardization forum 3GPP has specified the Global System for Mobile communication (GSM) while the standardization forum ITU-T has specified the Integrated Services Digital Networks (ISDN) User Part (ISUP) call control protocol. Both of these standards rely on the use of Time Division Multiplex (TDM) as a media bearer and SS7 as signalling bearer, where both bearers require use of very expensive telecom-specific hardware. The thesis proposes the solution to use RTP as media bearer and IP as signalling bearer towards the handset in GSM and only use TDM as media bearer and SS7 as signalling bearer towards the VMS. The thesis demonstrates the feasibility and the advantages provided, by creating an implementation in Erlang/OTP and testing it to check if it confirms to the specification.

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Gonzalez, Pavel. "Model checking GSM-based multi-agent systems." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/39038.

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Business artifacts are a growing topic in service oriented computing. Artifact systems include both data and process descriptions at interface level thereby providing more sophisticated and powerful service inter-operation capabilities. The Guard-Stage-Milestone (GSM) language provides a novel framework for specifying artifact systems that features declarative descriptions of the intended behaviour without requiring an explicit specification of the control flow. While much of the research is focused on the design, deployment and maintenance of GSM programs, the verification of this formalism has received less attention. This thesis aims to contribute to the topic. We put forward a holistic methodology for the practical verification of GSM-based multi-agent systems via model checking. The formal verification faces several challenges: the declarative nature of GSM programs; the mechanisms for data hiding and access control; and the infinite state spaces inherent in the underlying data. We address them in stages. First, we develop a symbolic representation of GSM programs, which makes them amenable to model checking. We then extend GSM to multi-agent systems and map it into a variant of artifact-centric multi-agent systems (AC-MAS), a paradigm based on interpreted systems. This allows us to reason about the knowledge the agents have about the artifact system. Lastly, we investigate predicate abstraction as a key technique to overcome the difficulty of verifying infinite state spaces. We present a technique that lifts 3-valued abstraction to epistemic logic and makes GSM programs amenable to model checking against specifications written in a quantified version of temporal-epistemic logic. The theory serves as a basis for developing a symbolic model checker that implements SMT-based, 3-valued abstraction for GSM-based multi-agent systems. The feasibility of the implementation is demonstrated by verifying GSM programs for concrete applications from the service community.

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Palmquist, Fredrik. "Satellite data communications as acomplement to GSM." Thesis, KTH, Teleinformatik, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-93580.

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The use of mobile Internet has reached the transport industry. Internet will be used to transport important and security-critical information from and to vehicles. Using Internet in this context raises a severe problem. Only 6% of the world is covered by GSM, the primary Internet bearer for mobile usage. The subject of this thesis is to explore suitable backups in order to provide the user with global coverage for important information exchange. The messages to send and receive are small in size, often less than 100 bytes. The time factor of the transmission is important, an alert message often has to be passed within minutes to be of any use. These factors together with the global coverage leave us with only one suitable solution, a satellite data communication system. The first part of this thesis contains an investigation of the satellite communication market. Two different systems, Inmarsat-C and ORBCOMM, are chosen for further study and evaluation. One Inmarsat-C unit and two ORBCOMM units are found suitable for the application. The last part of the thesis contains the evaluation, testing and system integration of these units. The conclusion is that ORBCOMM, although not yet fully developed, has the capabilities and performance necessary for use in a mobile environment such as a truck. The two different ORBCOMM units tested, Panasonic and Stellar, were found to have comparable qualities.

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Jatkonis, Eimantas. "GSM tinklo abonentų vietos duomenų srautų tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2006. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2006~D_20060529_235725-76195.

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Location dataflow analysis of mobile objects in GSM network is performed in this project. Dataflow are analyzed in these network nodes: BTS, BSC, MSC, and HLR. During research it is analyzed how data flows changes during day period, how these changes influence network nodes. The possibilities to gather and store data about subscribers' location are explored. The main target of this project is to set guidelines for implementation of European Union directive ST15449 in real GSM networks. Statistic data about data flow types is supplied by real GSM network operator. Experiments were performed using emulator of GSM network data flows. Additional features necessary for analysis were specified and implemented. After analysis it is determined that lowest impact of location dataflow is for BSC component. It is proposed to implement any location data gathering device in BSC nodes.

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Liu, Christine N. "Channel coding for enhanced full rate GSM." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39398.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
Includes bibliographical references (leaves 57-59).
by Christine N. Liu.
M.Eng.

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Kleiman, Jennifer C. (Jennifer Carey) 1976. "A multiprocessor implementation for the GSM algorithm." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/87154.

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Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
Includes bibliographical references (leaves 51-52).
by Jennifer C. Kleiman.
S.B.and M.Eng.

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Moraes, Murilo Oliveira de. "Desenvolvimento de uma antena quadribanda GSM integrada." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/259166.

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Orientador: Hugo Enrique Hernandez Figueroa
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-22T03:58:50Z (GMT). No. of bitstreams: 1 Moraes_MuriloOliveirade_M.pdf: 26552033 bytes, checksum: 9a9022f8aa6d5e4e72047f0798ad57da (MD5) Previous issue date: 2013
Resumo: A complexidade dos sistemas eletrônicos atuais cria a demanda por mais componentes num mesmo sistema, ao mesmo tempo em que exige sistemas mais compactos. Esta dissertação apresenta o desenvolvimento, fabricação e testes de uma antena GSM quadribanda, integrada a um módulo rastreador automotivo produzido no mercado nacional. A antena opera dentro das faixas de freqüências correspondentes _as bandas GSM 850/900/1800/1900, com desempenho adequado para uso no sistema de comunicação GSM, estando em conformidade com testes de TRP, sendo o produto final homologado pela ANATEL e agências reguladoras de outros países. A antena é um monopolo com dobras especiais para ajuste de ressonância. O casamento da antena com o sistema _e realizado via um toco em curto dobrado, não trivial, otimizado para um casamento banda-larga ao longo do espectro GSM ocupado
Abstract: The complexity of today's electronic systems creates demand for more quantity and less cost of components in a system, at the same time that the system must be made smaller. This dissertation presents the design and tests of a quadband GSM antenna, embedded into an existing automotive tracking module produced in Brazil. The antenna operates within the GSM 850/900/1800/1900 bands, with performance suitable for its use in the GSM system, being in conformance with TRP tests. The final product is approved by Brazil's regulatory agency ANATEL and by other countries' agencies. The antenna is a monopole with special bandings for resonance adjustment. The antenna matching is achieved with a shorted bent stub, non-trivial, optimized for a broadband matching over the occupied GSM spectrum
Mestrado
Telecomunicações e Telemática
Mestre em Engenharia Elétrica

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Dissertations / Theses on the topic 'GSM'

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