Master of Science in Information and Communication Technologies (MINT)
http://hdl.handle.net/2099.1/7027
2024-03-29T04:48:11ZDesign and implementation of a contributive photo-sharing mobile application for iOS
http://hdl.handle.net/2117/103838
Design and implementation of a contributive photo-sharing mobile application for iOS
Arreaza León, Roberto José
Throughout the following document, the concept for a photo-sharing mobile Application will be explained. Within its pages, the document demonstrates the development of an Application to create “social Events”, where users can create digital collaborative spaces to share their pictures, with other people who take part in the same event. The proposal is to be achieved by using the latest available technological tools for iOS development, as well as server Backend development. The fundamental requirements and specifications will be presented, as will all the considerations needed from the final user’s perspective, and all the technical issues regarding the design and development of the software Application. Parting from the initial presentation of the concept, going through the research phase and inspection of the required technologies, getting to the final design and implementation of the App, each stage is approached throughout the document in a way to give the reader a clear idea of the underlying motivation and philosophy adapted in the Project. In this manner, the reader is able to keep in mind this information, and will therefore be able to understand and justify the more practical and concrete sections of the Project. Finally it –the document- will present an overall evaluation including the initial goals set in contrast with the resulting software product. This is one in order to offer a list of possible future improvements that could in turn result in a better user experience, always in accordance to the initially stated philosophy and general purpose for the Application.
2017-04-28T10:30:00ZArreaza León, Roberto JoséThroughout the following document, the concept for a photo-sharing mobile Application will be explained. Within its pages, the document demonstrates the development of an Application to create “social Events”, where users can create digital collaborative spaces to share their pictures, with other people who take part in the same event. The proposal is to be achieved by using the latest available technological tools for iOS development, as well as server Backend development. The fundamental requirements and specifications will be presented, as will all the considerations needed from the final user’s perspective, and all the technical issues regarding the design and development of the software Application. Parting from the initial presentation of the concept, going through the research phase and inspection of the required technologies, getting to the final design and implementation of the App, each stage is approached throughout the document in a way to give the reader a clear idea of the underlying motivation and philosophy adapted in the Project. In this manner, the reader is able to keep in mind this information, and will therefore be able to understand and justify the more practical and concrete sections of the Project. Finally it –the document- will present an overall evaluation including the initial goals set in contrast with the resulting software product. This is one in order to offer a list of possible future improvements that could in turn result in a better user experience, always in accordance to the initially stated philosophy and general purpose for the Application.Design of compensation circuits and techniques for temperature and process variations in a Wibree RF front-end
http://hdl.handle.net/2117/100872
Design of compensation circuits and techniques for temperature and process variations in a Wibree RF front-end
Sroka, Milosz
El projecte analitza l'impacte de variacions de temperatura i procés sobre blocs d'un capçal RF per Wibree. Els primers dissenys dels circuits, realitzats en tecnologia CMOS, estan fets i l'objectiu del treball es fer modificacions per permetre el bon funcionament en un rang de temperatura específic i considerant variacions de procés. Es proposen diverses solucions per reduir les variacions de les característiques dels circuits : LNA ,mixer i VCO. El projecte es basa en tecnologia CMOS per RF de Seiko-EPSON; The work started after the development of first designs of a low noise amplifier (LNA), an active
and a passive mixers and a voltage controlled oscillator (VCO). The main objective was to study
the impact of temperature and process variations in those first designs and perform the
necessary compensation or correction regarding possible performance degradation. Thus, the
study included in this project intends to analyze the impact of the variations on the technology
and to define possible and feasible techniques to remove or decrease variations on the
concerned block of the RF front-end
2017-02-13T08:20:21ZSroka, MiloszEl projecte analitza l'impacte de variacions de temperatura i procés sobre blocs d'un capçal RF per Wibree. Els primers dissenys dels circuits, realitzats en tecnologia CMOS, estan fets i l'objectiu del treball es fer modificacions per permetre el bon funcionament en un rang de temperatura específic i considerant variacions de procés. Es proposen diverses solucions per reduir les variacions de les característiques dels circuits : LNA ,mixer i VCO. El projecte es basa en tecnologia CMOS per RF de Seiko-EPSON
The work started after the development of first designs of a low noise amplifier (LNA), an active
and a passive mixers and a voltage controlled oscillator (VCO). The main objective was to study
the impact of temperature and process variations in those first designs and perform the
necessary compensation or correction regarding possible performance degradation. Thus, the
study included in this project intends to analyze the impact of the variations on the technology
and to define possible and feasible techniques to remove or decrease variations on the
concerned block of the RF front-endTop-Down Mixed-Signal Verification for a Wireless Transceiver
http://hdl.handle.net/2117/100528
Top-Down Mixed-Signal Verification for a Wireless Transceiver
Günther, Sven Kirsten
In this Master Thesis the verification procedure of the top-down design process was implemented for the receiver sub-system of an IEEE 802.15.4 transceiver. The implemented flexible verification setup in Cadence enables continuous functionality checks of design changes of the receiver with the aid of behavioural models. The behavioural models for the receiver and for the RF and BB sub-circuit were created with the harware description language Verlog-AMS for analog/mixed-signal behaviour. The performance of functional verification test which were derived from the verification plan and were also developed with Verilog AMS, enabled accelerated simulation for interconnectivity and interoperability checks. Additionaly, the automation of the functional verification test was explored and a way was shown how this could be realised
2017-02-03T08:34:22ZGünther, Sven KirstenIn this Master Thesis the verification procedure of the top-down design process was implemented for the receiver sub-system of an IEEE 802.15.4 transceiver. The implemented flexible verification setup in Cadence enables continuous functionality checks of design changes of the receiver with the aid of behavioural models. The behavioural models for the receiver and for the RF and BB sub-circuit were created with the harware description language Verlog-AMS for analog/mixed-signal behaviour. The performance of functional verification test which were derived from the verification plan and were also developed with Verilog AMS, enabled accelerated simulation for interconnectivity and interoperability checks. Additionaly, the automation of the functional verification test was explored and a way was shown how this could be realisedWide Area Real Time Kinematic (WARTK): Usage of RTCM format, and real-time implementation
http://hdl.handle.net/2117/100527
Wide Area Real Time Kinematic (WARTK): Usage of RTCM format, and real-time implementation
Valls Moreno, Angel
Nowadays GNSS1 enhancement techniques have reached a relevant impor- tance and are present in a wide variety of applications. During the last years the Research Group of Astronomy and Geomatics (gAGE) from the Tech- nical University of Catalonia (UPC) has developed and tested new satellite navigation techniques which allow the extension of local services based on the real-time carrier phase ambiguity resolution2 to wide area scale (i.e., base- lines between the rover and reference stations greater than 100 km instead of 10 or 20 km as in common DGPS), for both dual-frequency (GPS) and tri-frequency systems (Galileo and Modernized GPS). These are the so-called Wide Area Real Time Kinematic techniques for 2 and 3 frequencies-systems (WARTK-2 and WARTK-3, respectively, see Colombo et al. 1999, 2002 and Hernandez-Pajares et al. 2003 that are based on an optimal combination of accurate ionospheric and geodetic models, in a permanent reference stations network. This Master Thesis touches on two important aspects about WARTK: one regards the broadcasting technique for the WARTK correction messages, and the feasibility of using RTCM 3.1 standard; and the other consists of a real-time implementation of the current WARTK-CPF3 software.
2017-02-03T07:34:24ZValls Moreno, AngelNowadays GNSS1 enhancement techniques have reached a relevant impor- tance and are present in a wide variety of applications. During the last years the Research Group of Astronomy and Geomatics (gAGE) from the Tech- nical University of Catalonia (UPC) has developed and tested new satellite navigation techniques which allow the extension of local services based on the real-time carrier phase ambiguity resolution2 to wide area scale (i.e., base- lines between the rover and reference stations greater than 100 km instead of 10 or 20 km as in common DGPS), for both dual-frequency (GPS) and tri-frequency systems (Galileo and Modernized GPS). These are the so-called Wide Area Real Time Kinematic techniques for 2 and 3 frequencies-systems (WARTK-2 and WARTK-3, respectively, see Colombo et al. 1999, 2002 and Hernandez-Pajares et al. 2003 that are based on an optimal combination of accurate ionospheric and geodetic models, in a permanent reference stations network. This Master Thesis touches on two important aspects about WARTK: one regards the broadcasting technique for the WARTK correction messages, and the feasibility of using RTCM 3.1 standard; and the other consists of a real-time implementation of the current WARTK-CPF3 software.Energy-autonomous wake-up receiver using solar panel and visible light communication
http://hdl.handle.net/2117/89280
Energy-autonomous wake-up receiver using solar panel and visible light communication
Sariol Ramos, Joyce
The use of wake-up communication systems is a potential energy-efficient and low-cost solution for data communication. In this thesis, we go one step further and use visible light both for wake-up communication and energy harvesting purposes, with the final objective of developing an energy-autonomous wake-up receiver module using Visible Light Communication (VLC). First, we present the details and the design criteria of this novel system. We then present the results of evaluation of component options such as solar panels and super-capacitors to include the proper choices at the receiver side. Finally, we present the results of the system performance from realistic indoor scenario tests, analyzing the effect of varying distances, angles, and light intensities, analyzing the effect of presence of interfering lights and analyzing the energy-harvesting characteristics of the receiver during realistic office working hours. Performance evaluation results demonstrated that the developed wake-up system with energy-autonomous receiver system can operate properly in most of the typical conditions of indoor scenarios. The energy-autonomous wake-up receiver derived can be included in realistic applications; mainly working attached to wireless communication systems that require energy efficiency like Wireless Sensor Networks (WSN).; El uso de sistemas de comunicaciones de wake-ups es una solución potencial energéticamente eficiente y de bajo costo para la comunicación de datos. En esta tesis vamos un paso más allá, utilizando la luz visible tanto para comunicaciones de wake-ups como para propósitos de recolección de energía, con el objetivo final de desarrollar un módulo receptor de wake-ups energéticamente autónomo usando Visible Light Communication (VLC). En primer lugar, se presentan los detalles y los criterios de diseño de este novedoso sistema. A continuación se presentan los resultados de la evaluación de opciones de componentes tales como paneles solares y supercondensadores para incluir los dispositivos adecuados en el receptor. Por último, se presentan los resultados de pruebas del rendimiento del sistema en escenarios interiores realistas, analizando primeramente el efecto a diferentes distancias, ángulos e intensidades de luz, luego analizando el efecto de la presencia de luces interferentes y finalmente analizando las características de recolección de energía del receptor durante horarios laborales realistas de oficinas. Los resultados de la evaluación del desempeño demostraron que el sistema de wake-ups desarrollado con un receptor energéticamente autónomo puede funcionar correctamente en la mayoría de las condiciones típicas de escenarios interiores. El receptor de wake-ups autónomo de energía derivado puede incluirse en aplicaciones realistas; principalmente operando adjunto a sistemas de comunicaciones inalámbricas que requieren eficiencia energética como redes de sensores inalámbricos (Wireless Sensor Networks-WSN).; Els sistemes de comunicacions de wake-up representen una solució energèticament eficient i de baix cost per a la comunicació de dades de forma inal·làmbrica. En aquesta tesi, s'utilitza la comunicació amb llum visible (VLC) tant per a comunicacions de wake-up com per a recol·lecció d'energia. La primera part del document conté una introducció teòrica. A continuació, es presenta una avaluació dels diferents components, com ara panells solar i supercondensadors, que conformen el hardware del node receptor desenvolupat al llarg del document. Finalment, es presenten els resultats d'extenses proves de rendiment del sistema en diferents escenaris realistes. Aquests resultats inclouen la sensitivitat del sistema a diferents distàncies, angles i intensitats de llum, l'efecte de llums interferents i quantificacions de la capacitat de recol·lecció d'energia del receptor en diferents casos d'ús. En l'avaluació es demostra com el sistema de wake-up desenvolupat pot funcionar fins i tot autònomament, sense necessitat de cap bateria, gràcies al seu baix consum i capacitat de recol·lecció d'energia en la majoria dels escenaris d'oficina pel qual ha estat desenvolupat. Actualment, la principal aplicació del sistema de wake-up per llum visible són les xarxes de sensors sense fils.
One of the most promising energy-efficient communication methods is the use of wake-up receivers. In this work, we will develop a novel wake-up communication system that uses Visual Light Communication (VLC) and an indoor solar panel as the receiver of the wake-up signal. After the reception of the wake-up signal, an interrupt generated by the wake-up receiver wakes up the wireless device attached.
2016-07-27T15:09:23ZSariol Ramos, JoyceThe use of wake-up communication systems is a potential energy-efficient and low-cost solution for data communication. In this thesis, we go one step further and use visible light both for wake-up communication and energy harvesting purposes, with the final objective of developing an energy-autonomous wake-up receiver module using Visible Light Communication (VLC). First, we present the details and the design criteria of this novel system. We then present the results of evaluation of component options such as solar panels and super-capacitors to include the proper choices at the receiver side. Finally, we present the results of the system performance from realistic indoor scenario tests, analyzing the effect of varying distances, angles, and light intensities, analyzing the effect of presence of interfering lights and analyzing the energy-harvesting characteristics of the receiver during realistic office working hours. Performance evaluation results demonstrated that the developed wake-up system with energy-autonomous receiver system can operate properly in most of the typical conditions of indoor scenarios. The energy-autonomous wake-up receiver derived can be included in realistic applications; mainly working attached to wireless communication systems that require energy efficiency like Wireless Sensor Networks (WSN).
El uso de sistemas de comunicaciones de wake-ups es una solución potencial energéticamente eficiente y de bajo costo para la comunicación de datos. En esta tesis vamos un paso más allá, utilizando la luz visible tanto para comunicaciones de wake-ups como para propósitos de recolección de energía, con el objetivo final de desarrollar un módulo receptor de wake-ups energéticamente autónomo usando Visible Light Communication (VLC). En primer lugar, se presentan los detalles y los criterios de diseño de este novedoso sistema. A continuación se presentan los resultados de la evaluación de opciones de componentes tales como paneles solares y supercondensadores para incluir los dispositivos adecuados en el receptor. Por último, se presentan los resultados de pruebas del rendimiento del sistema en escenarios interiores realistas, analizando primeramente el efecto a diferentes distancias, ángulos e intensidades de luz, luego analizando el efecto de la presencia de luces interferentes y finalmente analizando las características de recolección de energía del receptor durante horarios laborales realistas de oficinas. Los resultados de la evaluación del desempeño demostraron que el sistema de wake-ups desarrollado con un receptor energéticamente autónomo puede funcionar correctamente en la mayoría de las condiciones típicas de escenarios interiores. El receptor de wake-ups autónomo de energía derivado puede incluirse en aplicaciones realistas; principalmente operando adjunto a sistemas de comunicaciones inalámbricas que requieren eficiencia energética como redes de sensores inalámbricos (Wireless Sensor Networks-WSN).
Els sistemes de comunicacions de wake-up representen una solució energèticament eficient i de baix cost per a la comunicació de dades de forma inal·làmbrica. En aquesta tesi, s'utilitza la comunicació amb llum visible (VLC) tant per a comunicacions de wake-up com per a recol·lecció d'energia. La primera part del document conté una introducció teòrica. A continuació, es presenta una avaluació dels diferents components, com ara panells solar i supercondensadors, que conformen el hardware del node receptor desenvolupat al llarg del document. Finalment, es presenten els resultats d'extenses proves de rendiment del sistema en diferents escenaris realistes. Aquests resultats inclouen la sensitivitat del sistema a diferents distàncies, angles i intensitats de llum, l'efecte de llums interferents i quantificacions de la capacitat de recol·lecció d'energia del receptor en diferents casos d'ús. En l'avaluació es demostra com el sistema de wake-up desenvolupat pot funcionar fins i tot autònomament, sense necessitat de cap bateria, gràcies al seu baix consum i capacitat de recol·lecció d'energia en la majoria dels escenaris d'oficina pel qual ha estat desenvolupat. Actualment, la principal aplicació del sistema de wake-up per llum visible són les xarxes de sensors sense fils.Improving efficiency of administration of storage environments via scripting techniques and code reuse
http://hdl.handle.net/2117/88156
Improving efficiency of administration of storage environments via scripting techniques and code reuse
Moreno Villamizar, Joaquín Abelardo
2016-06-20T08:56:16ZMoreno Villamizar, Joaquín AbelardoDevelopment of tools for the use of Android cell-phones to recognize user activities
http://hdl.handle.net/2117/82743
Development of tools for the use of Android cell-phones to recognize user activities
Abdollah, Nooshin
The goal of this study is developing the fundamental techniques to define activity of the users like walking, running, standing or cycling while the user is using two different type of Network connectivity, GPRS or Wi-Fi by calculating the distance of the user in a period of time by the longitude and latitude of the user´s location which has reached in the location recognizing. Therefore, the main goal of the study to retrieve user’s activity is achieved by requesting location of user for each period of time, from current and previous location of user.
Using Android cell-phones, and consequently, having access to the input provided by the GPS receiver and the WI-FI receiver as well, the project will require to develop the necessary software and associated algorithms in order to deduce the user's activities in terms of the location of the user (indoors or outdoors) and those activities derived from detecting if the user is standing still, walking, running, driving a car, riding a bicycle, etc.
2016-02-09T15:04:29ZAbdollah, NooshinThe goal of this study is developing the fundamental techniques to define activity of the users like walking, running, standing or cycling while the user is using two different type of Network connectivity, GPRS or Wi-Fi by calculating the distance of the user in a period of time by the longitude and latitude of the user´s location which has reached in the location recognizing. Therefore, the main goal of the study to retrieve user’s activity is achieved by requesting location of user for each period of time, from current and previous location of user.All-fiber mach-zehnder interferometer for dwdm-pon bidirectional multiplexing
http://hdl.handle.net/2117/80315
All-fiber mach-zehnder interferometer for dwdm-pon bidirectional multiplexing
Kurysheva, Anna
Next generation optical access networks (FTTH, Fiber-to-the-Home), use wavelength division multiplexing (WDM) to highly increase the communication capacity to/from the users. A key issue in these networks is to split/combine the lights to/from the users at different wavelengths with the minimum losses, in a single fiber bidirectionaly.
Next generation optical access networks (FTTH, Fiber-to-the-Home), use wavelength division multiplexing (WDM) to highly increase the communication capacity to/from the users. A key issue in these networks is to split/combine the lights to/from the users at different wavelengths with the minimum losses, in a single fiber bidirectionaly.
2015-12-09T14:39:09ZKurysheva, AnnaNext generation optical access networks (FTTH, Fiber-to-the-Home), use wavelength division multiplexing (WDM) to highly increase the communication capacity to/from the users. A key issue in these networks is to split/combine the lights to/from the users at different wavelengths with the minimum losses, in a single fiber bidirectionaly.Creation and Feasibility Analysis of a Telecommunications Company in Brisbane - Australia
http://hdl.handle.net/2117/78951
Creation and Feasibility Analysis of a Telecommunications Company in Brisbane - Australia
Rojas Garcia, Jordan
The aim of this project is to study the viability of creating a telecom company in Brisbane - Australia. To do so, I have been studying the different services that companies currently offer to their clients, and how it is possible to create a company in Australia taking into account the requirements from the government. I decided to move to Australia two years ago, and have been preparing for this change in my life since then. The initiative to move in this country is the result of personal as well as professional factors, which are thoroughly explained in this Master´s project. Only a few weeks after my arrival in Australia, I realised the immense opportunities that this country offered to new businesses, and the incredible growth the telecommunications industry was experiencing. Looking deeper in this matter, I decided to write this project and balance the feasibility of starting a telecom company in Brisbane. Australia is within the Asia-Pacific region, the fastest growing ICT region in the world according the Queensland government. I have had a look at the different companies located in Queensland through the web portal "http://directories.deedi.qld.gov.au/ictcapability/", where it is possible to compare and check all the companies in Australia classified by the kind of business they are. Our company, which will be called Telenet, will be located in the surroundings of Brisbane – Queensland. Telenet will be classified as Telecommunications Hardware and Infrastructure, and according to information provided by Queensland government, there are currently 117 telecommunications hardware and infrastructure companies. There are only 7 companies classified as large companies over 117. An analysis of these competitors is made in order to compare their strength and weaknesses. Telenet is a two steps project. The first step is the one developed all along this Master Final Project, and consists in starting the company in Australia with the aim to provide telecommunication infrastructure to small and medium companies and make a portfolio of clients. In this one, we will need to keep in mind the second step and final aim of the project, which is to create a Data Centre where our existing and new clients will be able to rent our services such as: renting storage "data", renting space "racks", and renting internet service "as we will also be an ISP". This second part of the project will be developed one or two years after the beginning of the company´s operations, due to its huge investment, which has to be done by our investor. Both parts (the investor and partners) have agreed to start a company about installing telecommunication infrastructures and see if the company becomes profitable. The products and service we will offer are divided in three main sections: audits and diagnostics, consulting engineering and design, and management and implementation of the project. A study of the possible clients we will achieve the first year, as well as the number of clients will hire our service has been done, taking into account that not all of them will perform the three phases/service we offer. Furthermore, a business model about how the company works has been explained in a business model canvas in order to describe the value proposition, infrastructure, customers, and finances. The business model canvas consists in 9 blocks where the operability of the company Telenet is explained in detail. Finally, the last part of the project is an analysis of the return on investment and profitability calculated according to our expectations of the first year of operation. You will find our sales forecast for the first year, as well as our expected profits for the first year.
2015-11-10T07:52:12ZRojas Garcia, JordanThe aim of this project is to study the viability of creating a telecom company in Brisbane - Australia. To do so, I have been studying the different services that companies currently offer to their clients, and how it is possible to create a company in Australia taking into account the requirements from the government. I decided to move to Australia two years ago, and have been preparing for this change in my life since then. The initiative to move in this country is the result of personal as well as professional factors, which are thoroughly explained in this Master´s project. Only a few weeks after my arrival in Australia, I realised the immense opportunities that this country offered to new businesses, and the incredible growth the telecommunications industry was experiencing. Looking deeper in this matter, I decided to write this project and balance the feasibility of starting a telecom company in Brisbane. Australia is within the Asia-Pacific region, the fastest growing ICT region in the world according the Queensland government. I have had a look at the different companies located in Queensland through the web portal "http://directories.deedi.qld.gov.au/ictcapability/", where it is possible to compare and check all the companies in Australia classified by the kind of business they are. Our company, which will be called Telenet, will be located in the surroundings of Brisbane – Queensland. Telenet will be classified as Telecommunications Hardware and Infrastructure, and according to information provided by Queensland government, there are currently 117 telecommunications hardware and infrastructure companies. There are only 7 companies classified as large companies over 117. An analysis of these competitors is made in order to compare their strength and weaknesses. Telenet is a two steps project. The first step is the one developed all along this Master Final Project, and consists in starting the company in Australia with the aim to provide telecommunication infrastructure to small and medium companies and make a portfolio of clients. In this one, we will need to keep in mind the second step and final aim of the project, which is to create a Data Centre where our existing and new clients will be able to rent our services such as: renting storage "data", renting space "racks", and renting internet service "as we will also be an ISP". This second part of the project will be developed one or two years after the beginning of the company´s operations, due to its huge investment, which has to be done by our investor. Both parts (the investor and partners) have agreed to start a company about installing telecommunication infrastructures and see if the company becomes profitable. The products and service we will offer are divided in three main sections: audits and diagnostics, consulting engineering and design, and management and implementation of the project. A study of the possible clients we will achieve the first year, as well as the number of clients will hire our service has been done, taking into account that not all of them will perform the three phases/service we offer. Furthermore, a business model about how the company works has been explained in a business model canvas in order to describe the value proposition, infrastructure, customers, and finances. The business model canvas consists in 9 blocks where the operability of the company Telenet is explained in detail. Finally, the last part of the project is an analysis of the return on investment and profitability calculated according to our expectations of the first year of operation. You will find our sales forecast for the first year, as well as our expected profits for the first year.Study of scalability of passive and active solutions for time-based ranging in IEEE 802.11 networks
http://hdl.handle.net/2117/78294
Study of scalability of passive and active solutions for time-based ranging in IEEE 802.11 networks
Malpartida Tablado, Marta
Wireless positioning systems have become very popular in recent years. Outdoor positioning has been addressed successfully, but location indoor present some issues, such as the scalability. The aim of this study is evaluate the scalability and latency of two time based ranging positioning algorithms. In order to reach this purpose a simulation tool implementing the IEEE 802.11 b/g protocol stack and 2-Way TOA and passive TDOA algorithms was built. Thus, a comparison of both algorithms is done for different scenarios. Those scenarios evaluate both techniques under two different mobility models, static grid and Gauss Markov, and two different environments: outdoor and indoor. Results show that Passive TDOA is more scalable than 2-Way TOA in all proposed scenarios.
2015-10-27T07:24:31ZMalpartida Tablado, MartaWireless positioning systems have become very popular in recent years. Outdoor positioning has been addressed successfully, but location indoor present some issues, such as the scalability. The aim of this study is evaluate the scalability and latency of two time based ranging positioning algorithms. In order to reach this purpose a simulation tool implementing the IEEE 802.11 b/g protocol stack and 2-Way TOA and passive TDOA algorithms was built. Thus, a comparison of both algorithms is done for different scenarios. Those scenarios evaluate both techniques under two different mobility models, static grid and Gauss Markov, and two different environments: outdoor and indoor. Results show that Passive TDOA is more scalable than 2-Way TOA in all proposed scenarios.