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  • A topic on simulation in telecommunications engineering

     Barceló Arroyo, Francisco; Martin Escalona, Israel; Zola, Enrica Valeria
    IEEE Global Engineering Education Conference
    Presentation's date: 2014-04-03
    Presentation of work at congresses

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    Topics on network simulation are often offered as elective topics or short seminars of programs on computer sciences and telecommunications engineering. In other programs simulation is offered as part of a general core topic (e.g. probability and statistics, network performance, etc.). It is not frequent to find simulation as a core topic. At the Faculty of Telecommunications in Barcelona it was decided to include network simulation as a core topic in the former integrated master (5 academic years) on telecommunication engineering. This paper deals with the reasons after that decision. The goal of the paper is to present and discuss how the topic evolved through the years and how it has been migrated to the new careers with separated degree and master after the Bologna process.

    Topics on network simulation are often offered as elective topics or short seminars of programs on computer sciences and telecommunications engineering. In other programs simulation is offered as part of a general core topic (e.g. probability and statistics, network performance, etc.). It is not frequent to find simulation as a core topic. At the Faculty of Telecommunications in Barcelona it was decided to include network simulation as a core topic in the former integrated master (5 academic years) on telecommunication engineering. This paper deals with the reasons after that decision. The goal of the paper is to present and discuss how the topic evolved through the years and how it has been migrated to the new careers with separated degree and master after the Bologna process.

  • Software-based system for measuring location observables in IEEE 802.11 networks

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    IEEE IFIP Annual Mediterranean Ad Hoc Networking Workshop
    Presentation's date: 2013-06-26
    Presentation of work at congresses

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    Several techniques have been proposed for positioning nodes over IEEE 802.11 networks, but only few consist in time-based multilateration, mainly due to the protocol stack not supporting accurate timestamps. One frequent solution is to develop the hardware required for providing accurate timestamps. However, this approach tends to slow down the research and the ulterior deployment of the location techniques, since the performance of these techniques is bounded to a specific hardware design. This paper presents a measuring system aimed at providing location observables that can be used in time-based multilateration techniques. The system, which follows a software approach, is based on enhancing the SoftMAC layer of Linux with location-measuring capabilities. The system is conceived for supporting any kind of time-based measurements, by adding as many plugins as measured observables. Two plugins have been initially developed. The first one computes the round trip time of a message from a station to an access point and back again to the station. The second plugin calculates time-differences of arrival suitable for being used in the passive TDOA technique. This work provides the definition of the measuring system. Real data has been collected to test the system. The results indicate that the measurements provided by the system can be used for location purposes, i.e. they follow the physical laws in which metrics are based (e.g. they grow along with the distance between the nodes).

  • The introduction of a topic on accessibility in several engineering degrees

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    IEEE Global Engineering Education Conference
    Presentation's date: 2013-03-13
    Presentation of work at congresses

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    Together with the trend towards engineering designs more accessible to handicapped people there is an increasing concern at the engineering faculties to include topics related to accessibility in their programs. Engineers must be aware that handicapped people use technology and designs must take into account this fact. This paper explains how a topic on accessibility was started at a technical faculty as a cross topic to five different engineering degrees: Electrical, Electronics and Automatic Control, Industrial Product Design, Electronic Systems and Computer Science. The introduction process is explained along with the teaching methodology. Results after the first two courses are good in general but present some issues. The main issue to be corrected is that students from different branches achieve different academic performances.

    Together with the trend towards engineering designs more accessible to handicapped people there is an increasing concern at the engineering faculties to include topics related to accessibility in their programs. Engineers must be aware that handicapped people use technology and designs must take into account this fact. This paper explains how a topic on accessibility was started at a technical faculty as a cross topic to five different engineering degrees: Electrical, Electronics and Automatic Control, Industrial Product Design, Electronic Systems and Computer Science. The introduction process is explained along with the teaching methodology. Results after the first two courses are good in general but present some issues. The main issue to be corrected is that students from different branches achieve different academic performances.

  • From integrated to international masters in engineering: the increase of heterogeneity

     Barceló Arroyo, Francisco; Martin Escalona, Israel; Zola, Enrica Valeria
    International Conference on Education and New Learning Technologies
    Presentation's date: 2013-07-01
    Presentation of work at congresses

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    This paper analyses the difficulties found in some countries in Europe were the traditional integrated masters of five or six academic years were split into degree plus master after the Bologna process. Often, the master years of the former integrated master are oriented to international students and the lecturers find a high degree of diversity not present in the degree (this latter in local language and targeted to local students, close to the former first years of the integrated master). A case belonging to a master in computer networks is discussed together with some facts, difficulties found during the first years, discussion and possible ways to solve some of the detected issues.

  • Robust association for multi-radio devices under coverage of multiple networks

     Zola, Enrica Valeria; Dely, Peter; Kassler, Andreas; Barceló Arroyo, Francisco
    International Conference on Wired/Wireless Internet Communications
    Presentation's date: 2013-06-05
    Presentation of work at congresses

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    Many devices are nowadays equipped with multiple wireless network interfaces such as GSM, HSPA+ and WLAN. This requires a mechanism for identifying which access network to use at a given time so to provide best user experience. Such decision is typically made using past information available at the user (e.g. history of signal strength measurements), or using a prediction of the future status of the parameters of interest. The key problem is that the parameter estimation is difficult and that the predictions may be inaccurate. In this paper, we develop a mathematical model for the access network selection problem, which is solved using robust optimization techniques. The objective is to maximize the download rate the user can achieve during a certain period in the future. The model provides guidelines for selecting the access network which guarantees, within a given probability bound, a minimum download rate for a given rate uncertainty.

    Many devices are nowadays equipped with multiple wireless network interfaces such as GSM, HSPA+ and WLAN. This requires a mechanism for identifying which access network to use at a given time so to provide best user experience. Such decision is typically made using past information available at the user (e.g. history of signal strength measurements), or using a prediction of the future status of the parameters of interest. The key problem is that the parameter estimation is difficult and that the predictions may be inaccurate. In this paper, we develop a mathematical model for the access network selection problem, which is solved using robust optimization techniques. The objective is to maximize the download rate the user can achieve during a certain period in the future. The model provides guidelines for selecting the access network which guarantees, within a given probability bound, a minimum download rate for a given rate uncertainty.

  • Linux-based measuring platform for time-based location observables in IEEE 802.11 networks

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    Joint ERCIM eMobility and MobiSense Workshop
    Presentation's date: 2013-06-04
    Presentation of work at congresses

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    Positioning has been a hot topic in research for several years. GPS is accepted as a global solution for positioning outdoors, but indoor positioning still remains an open issue. Time-based multilateration techniques are presented as a good trade-off between performance and complexity for indoor positioning. Although several proposals for time-based multilateration has been presented, only some of them has been really implemented and of them, only few can be reproduced by other researchers (mainly due to hardware customization). This work presents a system for measuring time-based location observables in IEEE 802.11 networks. This measuring system has been implemented in Linux, so it can be deployed easily by any researcher. The current implementation supports the measurement of two kind of observables: round trip times (for two-way time-of-arrival techniques) and passive TDOAs (for the passive TDOA location technique). First experiments, presented in this paper, are focused on demonstrating the feasibility of the system for measuring these two location observables.

    Positioning has been a hot topic in research for several years. GPS is accepted as a global solution for positioning outdoors, but indoor positioning still remains an open issue. Time-based multilateration techniques are presented as a good trade-off between performance and complexity for indoor positioning. Although several proposals for time-based multilateration has been presented, only some of them has been really implemented and of them, only few can be reproduced by other researchers (mainly due to hardware customization). This work presents a system for measuring time-based location observables in IEEE 802.11 networks. This measuring system has been implemented in Linux, so it can be deployed easily by any researcher. The current implementation supports the measurement of two kind of observables: round trip times (for two-way time-of-arrival techniques) and passive TDOAs (for the passive TDOA location technique). First experiments, presented in this paper, are focused on demonstrating the feasibility of the system for measuring these two location observables.

  • Software based measurement of round trip time observables for location in IEEE 802.11 networks

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    International Conference on Telecommunications
    Presentation's date: 2013-07
    Presentation of work at congresses

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    Time-based multilateration in IEEE 802.11 networks usually involves custom hardware designs, which tend to slow down the implementation and deployment of the location system. This paper presents software for calculating time-based location observables. This software enhances the SoftMAC layer of the Linux operating system by adding location-related measuring capabilities. A plugin for calculating the round trip time between two network entities is included in the software definition. Real data have been collected to test the performance of the proposed system. Despite the relevant noise present in the measurements, the results prove that the round trip time measurements achieved are useful to estimate distances achieving estimates with RMS of the error close to 2 meters.

    Time-based multilateration in IEEE 802.11 networks usually involves custom hardware designs, which tend to slow down the implementation and deployment of the location system. This paper presents software for calculating time-based location observables. This software enhances the SoftMAC layer of the Linux operating system by adding location-related measuring capabilities. A plugin for calculating the round trip time between two network entities is included in the software definition. Real data have been collected to test the performance of the proposed system. Despite the relevant noise present in the measurements, the results prove that the round trip time measurements achieved are useful to estimate distances achieving estimates with RMS of the error close to 2 meters.

  • Expected bit rate for terminals moving according to the random waypoint model in a WLAN cell

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; Kassler, Andreas; Dely, Peter
    Wireless and Mobile Networking Conference
    Presentation's date: 2013-04-24
    Presentation of work at congresses

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    The IEEE 802.11 standard defines the different bit rates and modulation schemes to which a WLAN device may adapt according to the channel quality. User mobility may also have an impact on the available bit rate. This paper presents a study of the bit rate evolution along time for devices that move according to the Random Waypoint mobility pattern in WLAN cells. Simulation has been applied in order to obtain statistical results that permit to characterize the evolution of the bit rate behavior along time and to compute average results in the ideal case (without interference) and in the presence of interfering devices. Our results can be useful in the solution of optimization problems in which decision on where to connect must be taken based on some minimum guaranteed bit rate. They also can be useful in the design of inter and intra-cell handover methods and load balancing schemes.

    The IEEE 802.11 standard defines the different bit rates and modulation schemes to which a WLAN device may adapt according to the channel quality. User mobility may also have an impact on the available bit rate. This paper presents a study of the bit rate evolution along time for devices that move according to the Random Waypoint mobility pattern in WLAN cells. Simulation has been applied in order to obtain statistical results that permit to characterize the evolution of the bit rate behavior along time and to compute average results in the ideal case (without interference) and in the presence of interfering devices. Our results can be useful in the solution of optimization problems in which decision on where to connect must be taken based on some minimum guaranteed bit rate. They also can be useful in the design of inter and intra-cell handover methods and load balancing schemes.

  • A software platform for measuring distances through round trip time in IEEE 802.11

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    Wireless and Mobile Networking Conference
    Presentation's date: 2013-04-23
    Presentation of work at congresses

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    Indoor positioning has focused the interest of researchers for years. Although there are several techniques proposed, they are difficult to reproduce and consequently to contrast and improve. This paper presents a modular location platform, which enhances the SoftMAC implementation in Linux with positioning capabilities. This platform can be deployed in any device running Linux kernel 2.6 or higher. The core of the platform is its software-based measuring system. This measuring system supports the 2-way TOA technique, but any time-based multilateration technique (e.g. passive TDOA) can be incorporated with minimum changes. Real data have been gathered to assess the performance of the measuring system. The RTTs estimated grow with the distance, which demonstrates the feasibility of the system.

    Indoor positioning has focused the interest of researchers for years. Although there are several techniques proposed, they are difficult to reproduce and consequently to contrast and improve. This paper presents a modular location platform, which enhances the SoftMAC implementation in Linux with positioning capabilities. This platform can be deployed in any device running Linux kernel 2.6 or higher. The core of the platform is its software-based measuring system. This measuring system supports the 2-way TOA technique, but any time-based multilateration technique (e.g. passive TDOA) can be incorporated with minimum changes. Real data have been gathered to assess the performance of the measuring system. The RTTs estimated grow with the distance, which demonstrates the feasibility of the system.

  • Characterizing user behavior in a european academic WiFi network

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    International Journal of Handheld Computing Research (IJHCR)
    Date of publication: 2013
    Journal article

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    Wireless local area networks (WLANs) are commonplace in many universities. Understanding the trends in the usage of these networks is becoming more important. Interesting results can be extracted about association patterns by analyzing WLAN traces from real scenarios. In this work, the library in the main campus of the Technical University of Catalonia (UPC) in Barcelona has been studied. Daily and weekly patterns of the WLAN connections are shown. The population accessing the network is mostly composed of infrequent users: half of the population accesses the WLAN once during each month. Many users associate to only one of the twelve possible access points, which means that, despite the widespread use of lightweight devices, many users are static. The results of this analysis provide general tools for characterizing campus-wide WLAN and a better understanding of usage and performance issues in a mature wireless network.

  • Forecasting the next handoff for users moving with the Random Waypoint mobility model

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; Martin Escalona, Israel
    Eurasip journal on wireless communication and networking
    Date of publication: 2013-01-25
    Journal article

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    Users in a cellular network can move while their connections are handed off to different access points. Studies prove that the mobility pattern followed have a strong impact on performance metrics (i.e., handoff (HO) rate, cell residence time). Recently, some key aspects of the Random Waypoint mobility model have been studied in depth, but relating those studies with different cellular layouts has not been reported. Interest in forecasting the cell to which a device may be handed off depending on the movement pattern is twofold. First, it gives insight into properties and statistics of the mobility model. Second, and from a more practical perspective, it is useful to manage resource allocation and reservation strategies in order to smooth the HO process. The goal of this article is to provide an analytical framework for these predictions in a simple layout. Given a node's current location and the timestamp and location of the last waypoint, an approximation for HO during time Delta t is derived. The analysis is provided along with numerical examples and simulations for a symmetrical layout and uniform speed distribution. Results shed light on how useful more advanced strategies can be.

  • Impact of the range and geometry estimation in the accuracy of the passive TDOA algorithm

     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    Annual Mediterranean Ad Hoc Networking Workshop
    Presentation's date: 2012-06-22
    Presentation of work at congresses

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    The positioning ability is essential in mobile networks. Providing the position of entities is in general a complex task that becomes especially hard in ad hoc networks. In these networks, the topology cannot be planned and network nodes usually present restrictions in terms of computation capabilities and autonomy that constrain the network lifetime. Passive algorithms have been proposed for minimizing the impact of location services in the network, i.e. reducing the location traffic and extending the network life. However, the accuracy of passive algorithms tends to be worse than the accuracy for active approaches. This paper studies the impact of several proposals focused on improving the accuracy of the passive TDOA algorithm. Results indicate that weighing the ordinary least squares algorithm with the appropriate factors could be enough for improving the accuracy of the algorithm in some scenarios.

  • Distribution of the frequency of connections in academic WLAN networks

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    International Conference on Networking and Services
    Presentation's date: 2012-03-26
    Presentation of work at congresses

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    Understanding the trends in the use of wireless local area networks (WLANs) (i.e., how much, when and where traffic is present) is an important issue for modeling the network and for optimizing the allocated resources. Interesting results can be extracted by analyzing traces from real scenarios. In previous works, the authors studied three buildings belonging to two campuses in Barcelona (Spain) and its surroundings. Similar common trends were observed in the three buildings, despite the different amount of users, purpose of the building, geographical location and size of the campus. In this work, the fidelity of the users in accessing the WLAN in different days is analyzed in depth. The population accessing the networks is mostly composed of infrequent users: less than half of the devices access the WLAN more than four days during the studied period. Special insight is given to the underlying distribution. It is shown that, in contrast to previous studies in the same environment, the distribution of the frequency of reconnections to the WLAN is not uniform. The main difference among different buildings is the fidelity of users: users on a small campus are more likely to reappear on different days than on a large campus, where the population is more heterogeneous. The results of this analysis provide general tools for characterizing campus-wide WLAN and a better understanding of usage and performance issues in a mature wireless network in Europe.

  • Access to the full text
    DYMO routing protocol with knowledge of nodes¿ position  Open access

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    Joint ERCIM eMobility and MobiSense Workshop
    Presentation's date: 2012-06-08
    Presentation of work at congresses

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    We present a system that selects the optimal route between two points for vehicles moving in an urban environment. Our approach uses location data gathered from smartphones, which includes route segments and their corresponding travel time. The system can be used as a standalone application with a user interface for path visualization. Additionally, route selection and location prediction can be used for improving streaming video applications and for scheduling delay tolerant data transfers to achieve mobile data offloading.

  • Probability of handoff to neighbor cells for random waypoint mobility and non-ideal conditions

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    Baltic Congress on Future Internet Communications
    Presentation's date: 2012-04-26
    Presentation of work at congresses

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    The handoff process allows users to move while their communication is handled by different antennas in the network. A proper configuration of network's parameters is required in order to guarantee a given QoS for both moving and static users. Prediction of the next cell to which a user may need to connect in the near future may help to better allocate resources in the network and to guarantee the continuity of the communication. In previous works, analytical results for these predictions for nodes moving according to the Random Waypoint mobility model have been presented. However, the mathematical analysis is only possible for simple cases with ideal conditions of propagation and handoff strategy. In this paper, simulation results for the proposed model are presented under different radio channel conditions and handoff strategies. First, the study validates the existing analytical model for ideal conditions. Second, the results prove that the probability of handoff increases under non-ideal radio channel conditions. Moreover, a different handoff strategy may lead to relevant differences in the prediction, thus proving that the handoff strategy has a strong impact on the network performance.

  • Contributions to the Planning of the Layout and Handover in Cellular Networks

     Zola, Enrica Valeria
    Defense's date: 2011-10-20
    Department of Telematics Engineering, Universitat Politècnica de Catalunya
    Theses

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  • A comparative analysis of the user behavior in academic WiFi networks

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    ACM Performance Monitoring, Measurement, and Evaluation of Heterogeneous Wireless and Wired Networks
    Presentation's date: 2011-10-31
    Presentation of work at congresses

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  • Probability of handoff for users moving with the random waypoint mobility model

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    IEEE Conference on Local Computer Networks
    Presentation's date: 2011-10-05
    Presentation of work at congresses

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  • How students use WLAN inside the classrooms: patterns and behavior

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    IADIS International Conference on Mobile Learning
    Presentation's date: 2011-03-10
    Presentation of work at congresses

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    Discrete event simulation of wireless cellular networks  Open access

     Zola, Enrica Valeria; Martin Escalona, Israel; Barceló Arroyo, Francisco
    Date of publication: 2010-09
    Book chapter

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  • Cost Action IC0906: Wireless Networking for Moving Objects (WiNeMO)

     Koucheryavy, Yevgeni; Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
    Participation in a competitive project

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  • ENCAMINAMIENTO PARA REDES AD-HOC BASADO EN LOCALIZACION DE TERMINALES. APLICACIONES Y SINERGIAS CON

     Rojas Espinosa, Alfonso; Martin Escalona, Israel; Zola, Enrica Valeria; Ciurana Adell, Marc; Barceló Arroyo, Francisco
    Participation in a competitive project

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  • WLAN User Behavior: Opportunities for m-Learning

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    IADIS International Conference on Mobile Learning
    Presentation's date: 2010-03-19
    Presentation of work at congresses

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  • Impact of mobility models on the cell residence time in WLAN networks

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    IEEE Sarnoff Symposium
    Presentation's date: 2009-03
    Presentation of work at congresses

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    Several mobility models are available for simulating WLAN, with different impacts on network performance. This work deals with the impact of the assumed mobility model on two key teletraffic variables involved in the planning of the network: the cell residence time (i.e., time connected to an access point) and the handoff rate. These two variables are studied in different scenarios for WLANs designed for pedestrians. For this purpose, discrete event simulations are run with different mobility patterns and number of access points. The time between changes of access point (i.e., handoffs) is studied as a random variable. This research proves the importance of correctly selecting the assumed mobility pattern, as it has a strong impact on the number of handoffs. The probability density function of the cell residence time is also studied as a combination of a distribution that models fast disassociation events (i.e., short ping-pongs between two access points) and a gamma or lognormal distribution, depending on the mobility pattern, which model longer dwells.

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    Comportamiento de los usuarios WLAN en el campus UPC de Barcelona  Open access

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; López Ramírez, María
    Jornadas de Ingeniería Telemática
    Presentation's date: 2009-09
    Presentation of work at congresses

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    A través del proyecto Education Roaming (eduroam), muchas universidades europeas permiten que sus usuarios puedan desplazarse entre ellas, disponiendo en todo momento de los servicios móviles igual que estuviesen en su propia universidad. La Universitat Politècnica de Catalunya (UPC) participa en este proyecto. Analizando los syslog de los puntos de acceso de la biblioteca principal del Campus Nord, se ha estudiado la actividad de los usuarios en la red WLAN de la UPC durante una semana y se ha extraído información sobre el comportamiento de los usuarios. A pesar de la difusión de dispositivos portátiles ligeros que facilitan su uso entre la gente joven mientras se va desplazando, en general los usuarios no se mueven mucho. No obstante la buena cobertura proporcionada por la infraestructura de red, los usuarios sufren muchos problemas de conectividad. Los resultados de nuestro trabajo pueden resultar útiles para mejorar la calidad de la red inalámbrica y para diseñar nuevas aplicaciones que se adapten a los hábitos de los usuarios.

  • User behaviour in a WLAN campus: a real case study

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; López Ramírez, María
    Third ERCIM Workshop on eMobility
    Presentation's date: 2009-05
    Presentation of work at congresses

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  • Analysis of cell residence time in WLAN under different mobility models

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    2nd ERCIM Workshop on emobility
    Presentation's date: 2008-05-22
    Presentation of work at congresses

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  • Estudio del tiempo de conexión en redes ad-hoc bajo diferentes patrones de movimiento

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    Jornadas de Ingeniería Telemática
    Presentation's date: 2008-09-16
    Presentation of work at congresses

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  • About the location of base stations for a UMTS system: analytical study and simulations

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    Journal of communications and networkS
    Date of publication: 2006-03
    Journal article

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  • TEC2006-09466 LOCALIZACIÓN DE TERMINALES EN REDES CELULARES Y SUS APLICACIONES A LA OPTIMIZACIÓN DE LA OPERACIÓN DE LA RED

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; Vassileva Vesselinova, Natalia; Ciurana Adell, Marc; Martin Escalona, Israel
    Participation in a competitive project

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  • Performance evaluation of a TOA-based trilateration method to locate terminals in WLAN

     Izquierdo, E; Ciurana Adell, Marc; Barceló Arroyo, Francisco; Paradells Aspas, Jose; Zola, Enrica Valeria
    IEEE International Symposium on Wireless Pervasive Computing
    Presentation's date: 2006-01-16
    Presentation of work at congresses

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    Planning the base station layout in UMTS urban scenario: a simulation approach to coverage and capacity estimation  Open access

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    Lecture notes in computer science
    Date of publication: 2004-08
    Journal article

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    This paper analyzes the performance of a base station layout for a UMTS network in a densely populated city. The study is carried out using snapshot simulations of an actual city (Barcelona, Spain) with specific traffic and propagation profiles. A first layout is proposed in order to guarantee good coverage with a minimum number of base stations. This layout is approached taking into account the link budget analytical calculations and the first simulation results for a single-cell environment. A second layout is then presented in an attempt to solve the problems that arise in the first (e.g. shadows, blind zones, etc.). This is carried out by finely tuning parameters from the first layout, adding new base stations and changing the locations of the existing ones.

  • TIC2002-12369-E LOCATION BASED SERVICES FOR THE ENHANCEMENT OF WORKING ENVIRONMENT

     Barceló Arroyo, Francisco; Zola, Enrica Valeria; Ciurana Adell, Marc; Martin Escalona, Israel
    Participation in a competitive project

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  • TEC2005-24723-E LIAISON

     Barceló Arroyo, Francisco; Zola, Enrica Valeria; Ciurana Adell, Marc; Martin Escalona, Israel
    Participation in a competitive project

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  • Planning the Base Station layout in UMTS urban scenario: a simulation approach to coverage and capacity estimation

     Zola, Enrica Valeria; Barceló Arroyo, Francisco
    International Conference on Telecommunications
    Presentation's date: 2004-08
    Presentation of work at congresses

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  • LOCATION BASED SERVICES FOR THE ENHANCEMENT OF WORKING ENVIRONMENT

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; Paradells Aspas, Jose; Ciurana Adell, Marc; Martin Escalona, Israel
    Participation in a competitive project

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  • Simulation Analysis of Cell Coverage and Capacity Planning in a UMTS Environment: a Case Study

     Zola, Enrica Valeria; Barceló Arroyo, Francisco; Martin Escalona, Israel
    Proceedings of the Second IASTED Internation Conference on Communication Systems and Networks
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    Presentation of work at congresses

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     Barceló Arroyo, Francisco; Paradells Aspas, Jose; Casademont Serra, Jordi; Garcia Villegas, Eduard; Gomez Montenegro, Carlos; Martin Escalona, Israel; Zola, Enrica Valeria
    Participation in a competitive project

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     Martin Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria
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