- Position: Associate Professor and Director of the EPS
- Email: loren.carrasco@uib.es
- Research Area: Communications and Networking
- Google Scholar profile
Biography
Loren Carrasco Martorell was born in Puigpunyent, Spain, in 1968. She received the Engineer of Telecommunication degree from the Polytechnic University of Catalonia (UPC) in 1991 and Ph.D. degree from the University of the Balearic Islands in 2005.
From 1990 to 1991, she did a research stage at the École Nationale Superieure des Telecommunications in Paris. After that, from 1992 to 1995 she worked as a research engineer in Telefónica I+D Madrid, the research and development center of the spanish main PTT. Since 1997 she has held several positions at the Department of Mathematics and Informatics of the University of the Balearic Islands (UIB) and at this moment she is an Associate Professor of this Department.
Her current research interests and activities concentrate in the wireless personal communication systems field, with particular emphasis on third generation systems. She is author of articles in international journals on this topic as well as of communications to international conferences.
She is collaborating on several projects concerned with Wireless LAN (WLAN) funded by the Spanish and Balearic Islands governments. She has been also involved in some european projects (MONET, CODIT, EURESCOM P.306).
Projects
- TERESA: Caracterización estadística, abstracción de capa física (PHY) y gestión de recursos radio en redes ultradensas
- ELISA: Asignación avanzada de recursos radio para el acceso compartido a redes con licencia y sin licencia.
- AM3DIO: Adaptive Multicarrier-Multiantenna-Multiuser networks based on Distributed inference and Optimisation
- COSMOS: Cross-layer optimisation schemes in MIMO/OFDMA systems
- GESLOTEL: Wireless positioning for the tourism industry
- XISPES: High-performance wireless networks for the health environment
Theses
- Diseño y análisis de protocolos MAC para redes de comunicaciones móviles CDMA multimedia, L. Carrasco, Advisor: G. Femenias (PhD thesis, UIB, 2005).
Publications
2017
Ramis, J.; Carrasco-Martorell, L.
An Energy-Efficient and Delay-Constrained Resource Allocation Scheme for Periodical Monitoring Traffic in SmartBANs Conference
IEEE Biomedical Circuits and Systems Conference (BioCAS), Turin (Italy), 2017.
@conference{Ramis2017,
title = {An Energy-Efficient and Delay-Constrained Resource Allocation Scheme for Periodical Monitoring Traffic in SmartBANs},
author = {J. Ramis and L. Carrasco-Martorell},
year = {2017},
date = {2017-10-15},
booktitle = {IEEE Biomedical Circuits and Systems Conference (BioCAS)},
address = {Turin (Italy)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
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2013
Carrasco, Loren; Femenias, Guillem
Channel-aware MAC performance of AMC-ARQ-based wireless systems Journal Article
In: EURASIP Journal of Wireless Communications and Networking, vol. 2013:213, 2013.
@article{carrasco13,
title = {Channel-aware MAC performance of AMC-ARQ-based wireless systems},
author = {Loren Carrasco and Guillem Femenias},
year = {2013},
date = {2013-01-01},
journal = {EURASIP Journal of Wireless Communications and Networking},
volume = {2013:213},
keywords = {},
pubstate = {published},
tppubtype = {article}
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2011
Ramis, Jaume; Femenias, Guillem; Carrasco, Loren
Cross-layer modeling of AMC/ARQ-based wireless networks with outdated CSI Conference
IEEE International Symposium on Wireless Communication Systems (ISWCS), Aachen, Germany, 2011.
@conference{2011-ramis-ISWCS,
title = {Cross-layer modeling of AMC/ARQ-based wireless networks with outdated CSI},
author = {Jaume Ramis and Guillem Femenias and Loren Carrasco},
year = {2011},
date = {2011-11-01},
booktitle = {IEEE International Symposium on Wireless Communication Systems (ISWCS)},
address = {Aachen, Germany},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Carrasco, Loren; Femenias, Guillem; Ramis, Jaume
Cross-layer optimization of AMC/ARQ-based wireless networks with channel-aware multiuser scheduling protocols Conference
Jornadas de Ingeniería Telemática (JITEL), Santander (Spain), 2011.
@conference{Carrasco11JITEL,
title = {Cross-layer optimization of AMC/ARQ-based wireless networks with channel-aware multiuser scheduling protocols},
author = {Loren Carrasco and Guillem Femenias and Jaume Ramis},
year = {2011},
date = {2011-09-01},
booktitle = {Jornadas de Ingenier\'{i}a Telem\'{a}tica (JITEL)},
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Carrasco, Loren; Ramis, Jaume; n, Borja Da; Martorell, Gabriel; Femenias, Guillem; Riera-Palou, Felip
Dise~no de una metodología docente y material de ayuda para el Trabajo Final de Grado Conference
Jornadas de Innovación Educativa en Ingeniería Telemática (JIE), Santander (Spain), 2011.
@conference{Carrasco11JIE,
title = {Dise~no de una metodolog\'{i}a docente y material de ayuda para el Trabajo Final de Grado},
author = {Loren Carrasco and Jaume Ramis and Borja Da ~n and Gabriel Martorell and Guillem Femenias and Felip Riera-Palou},
year = {2011},
date = {2011-09-01},
booktitle = {Jornadas de Innovaci\'{o}n Educativa en Ingenier\'{i}a Telem\'{a}tica (JIE)},
address = {Santander (Spain)},
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pubstate = {published},
tppubtype = {conference}
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Carrasco, Loren; Femenias, Guillem; Ramis, Jaume
Cross layer design of multirate/multiuser wireless networks with channel-aware scheduling Conference
IEEE International Symposium on Wireless Communication Systems (ISWCS), Nov Aachen, Germany, 2011.
@conference{2011-carrasco-ISWCS,
title = {Cross layer design of multirate/multiuser wireless networks with channel-aware scheduling},
author = {Loren Carrasco and Guillem Femenias and Jaume Ramis},
year = {2011},
date = {2011-01-01},
booktitle = {IEEE International Symposium on Wireless Communication Systems (ISWCS)},
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organization = {Nov},
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2010
Ramis, Jaume; Femenias, Guillem; Riera-Palou, Felip; Carrasco, Loren
Throughput optimization in QoS constrained adaptive wireless networks using Chase Combining HARQ Conference
JITEL 2010, vol. IX Jornadas, Valladolid, SPAIN, 2010.
@conference{2010jitel_jaume,
title = {Throughput optimization in QoS constrained adaptive wireless networks using Chase Combining HARQ},
author = {Jaume Ramis and Guillem Femenias and Felip Riera-Palou and Loren Carrasco},
editor = {Yannis Dimitriadis and Mar\'{i}a Jes{'u}s Verd{'u}-P \'{e}},
year = {2010},
date = {2010-01-01},
booktitle = {JITEL 2010},
volume = {IX Jornadas},
address = {Valladolid, SPAIN},
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pubstate = {published},
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Ramis, Jaume; Femenias, Guillem; Riera-Palou, Felip; Carrasco, Loren
Cross-layer optimization of adaptive multi-rate wireless networks using truncated Chase combining HARQ Conference
IEEE GLOBECOM, Miami, USA, 2010.
@conference{2010globecom,
title = {Cross-layer optimization of adaptive multi-rate wireless networks using truncated Chase combining HARQ},
author = {Jaume Ramis and Guillem Femenias and Felip Riera-Palou and Loren Carrasco},
year = {2010},
date = {2010-01-01},
booktitle = {IEEE GLOBECOM},
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2009
Carrasco, Loren; Ramis, Jaume; Femenias, Guillem
Multidimensional Markov Model for the Cross-Layer Design of Multirate Wireless Systems using the Effective Capacity Function Conference
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th, IEEE 2009.
@conference{VTC09,
title = {Multidimensional Markov Model for the Cross-Layer Design of Multirate Wireless Systems using the Effective Capacity Function},
author = {Loren Carrasco and Jaume Ramis and Guillem Femenias},
year = {2009},
date = {2009-01-01},
booktitle = {Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th},
pages = {1-5},
organization = {IEEE},
abstract = {In this paper, a novel framework for the cross-layer design of wireless networks combining adaptive modulation and coding (AMC) at the physical layer with an automatic repeat request (ARQ) protocol at
the data-link layer is proposed. In order to achieve this goal, the physical-layer service process is first modeled as a multidimensional finite-state Markov chain. Then, based on this multidimensional Markov model, the QoS performance at the data-link layer is characterized using the effective capacity approach. Queueing analysis using this effective capacity function is finally used in a cross-layer design approach aiming to satisfy the required average packet loss probability constraint by maximizing the average throughput of the system. Numerical examples are provided to show the advantages of our approach compared to other approaches using first-order amplitude-based finite state Markov models.},
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In this paper, a novel framework for the cross-layer design of wireless networks combining adaptive modulation and coding (AMC) at the physical layer with an automatic repeat request (ARQ) protocol at
the data-link layer is proposed. In order to achieve this goal, the physical-layer service process is first modeled as a multidimensional finite-state Markov chain. Then, based on this multidimensional Markov model, the QoS performance at the data-link layer is characterized using the effective capacity approach. Queueing analysis using this effective capacity function is finally used in a cross-layer design approach aiming to satisfy the required average packet loss probability constraint by maximizing the average throughput of the system. Numerical examples are provided to show the advantages of our approach compared to other approaches using first-order amplitude-based finite state Markov models.
Ramis, Jaume; Femenias, Guillem; Carrasco, Loren
Cross-layer design of multi-rate wireless networks based on link layer truncated ARQ Conference
IEEE International Workshop on Cross-Layer Design (IWCLD), vol. 2009, 2009.
@conference{IWCLD-2009,
title = {Cross-layer design of multi-rate wireless networks based on link layer truncated ARQ},
author = {Jaume Ramis and Guillem Femenias and Loren Carrasco},
year = {2009},
date = {2009-01-01},
booktitle = {IEEE International Workshop on Cross-Layer Design (IWCLD)},
volume = {2009},
abstract = {A Markov chain-based queueing model is developed for a cross-layer performance analysis of a wireless network based on adaptive modulation and coding (AMC) at the physical layer and truncated automatic repeat request (ARQ) error control at the data link layer. This model generalizes previous results by using a first-order two-dimensional Markov chain to model the wireless fading channel. Furthermore, it allows each frame at the physical layer to contain an arbitrary number of packets from the data link layer and still ensuring that, concerning the acknowledged packets, the transmit buffer operates in first-in first-out (FIFO) mode. Analytical expressions for performance metrics such as throughput, average packet delay and packet loss rate, both due to buffer overflow and due to exceeding the maximum number of allowed retransmissions, are derived. These expressions are then used to formulate a constrained optimization problem to maximize the system throughput under the
prescribed QoS constraints.},
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A Markov chain-based queueing model is developed for a cross-layer performance analysis of a wireless network based on adaptive modulation and coding (AMC) at the physical layer and truncated automatic repeat request (ARQ) error control at the data link layer. This model generalizes previous results by using a first-order two-dimensional Markov chain to model the wireless fading channel. Furthermore, it allows each frame at the physical layer to contain an arbitrary number of packets from the data link layer and still ensuring that, concerning the acknowledged packets, the transmit buffer operates in first-in first-out (FIFO) mode. Analytical expressions for performance metrics such as throughput, average packet delay and packet loss rate, both due to buffer overflow and due to exceeding the maximum number of allowed retransmissions, are derived. These expressions are then used to formulate a constrained optimization problem to maximize the system throughput under the
prescribed QoS constraints.
Femenias, Guillem; Ramis, Jaume; Carrasco, Loren
Using Two-Dimensional Markov Models and the Effective Capacity Approach for Cross-Layer Design in AMC/ARQ-Based Wireless Networks Journal Article
In: IEEE Transactions on Vehicular Technology, 2009.
@article{TVT-2009,
title = {Using Two-Dimensional Markov Models and the Effective Capacity Approach for Cross-Layer Design in AMC/ARQ-Based Wireless Networks},
author = {Guillem Femenias and Jaume Ramis and Loren Carrasco},
year = {2009},
date = {2009-01-01},
journal = {IEEE Transactions on Vehicular Technology},
abstract = {This paper proposes a novel framework for the cross-layer analysis and design of wireless networks combining adaptive modulation and coding (AMC) at the physical layer with an automatic repeat request (ARQ) protocol at the data-link layer. Most of previous works rely on first-order amplitude-based finite-state Markov chains (AFSMC) to model the physical layer. It is shown that these models present several deficiencies that could compromise the design of higher-layer protocols. Thus, a physical layer first-order two-dimensional Markov model using both the amplitude and the rate-of-change of the fading envelope is presented. Based on this multidimensional physical layer Markov model, the QoS performance at the data-link layer is investigated through the use of two different approaches. The first one relies on an analytical framework based on a discrete time Markov chain (DTMC) that jointly describes the statistical behaviour of the arrival process, the queueing system and the physical layer. The second one is based on the effective bandwidth and effective capacity theories. Both the DTMC-based and the effective bandwidth/capacity-based approaches are analyzed and compared in combination with our proposed physical layer first-order two-dimensional Markov model in a cross-layer design aiming to satisfy the required average packet loss probability constraint by maximizing the average throughput of the system. Numerical results show that our proposed framework represents a significant improvement over previous models.},
keywords = {},
pubstate = {published},
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This paper proposes a novel framework for the cross-layer analysis and design of wireless networks combining adaptive modulation and coding (AMC) at the physical layer with an automatic repeat request (ARQ) protocol at the data-link layer. Most of previous works rely on first-order amplitude-based finite-state Markov chains (AFSMC) to model the physical layer. It is shown that these models present several deficiencies that could compromise the design of higher-layer protocols. Thus, a physical layer first-order two-dimensional Markov model using both the amplitude and the rate-of-change of the fading envelope is presented. Based on this multidimensional physical layer Markov model, the QoS performance at the data-link layer is investigated through the use of two different approaches. The first one relies on an analytical framework based on a discrete time Markov chain (DTMC) that jointly describes the statistical behaviour of the arrival process, the queueing system and the physical layer. The second one is based on the effective bandwidth and effective capacity theories. Both the DTMC-based and the effective bandwidth/capacity-based approaches are analyzed and compared in combination with our proposed physical layer first-order two-dimensional Markov model in a cross-layer design aiming to satisfy the required average packet loss probability constraint by maximizing the average throughput of the system. Numerical results show that our proposed framework represents a significant improvement over previous models.
Ramis, Jaume; Carrasco, Loren; Femenias, Guillem
Dise~no intercapas en redes inalámbricas basadas en AMC y ARQ truncado Conference
JITEL 2009, vol. VIII Jornadas, Cartagena, Spain, 2009.
@conference{2009jitel_jaume,
title = {Dise~no intercapas en redes inal\'{a}mbricas basadas en AMC y ARQ truncado},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias},
year = {2009},
date = {2009-01-01},
booktitle = {JITEL 2009},
volume = {VIII Jornadas},
pages = {260-267},
address = {Cartagena, Spain},
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2008
Carrasco, Loren; Femenias, Guillem
Reverse link performance of a DS-CDMA system with both fast and slow power controlled users Journal Article
In: Wireless Communications, IEEE Transactions on, vol. 7, no. 4, pp. 1255-1263, 2008.
@article{GRECTPAR-531324,
title = {Reverse link performance of a DS-CDMA system with both fast and slow power controlled users},
author = {Loren Carrasco and Guillem Femenias},
year = {2008},
date = {2008-01-01},
journal = {Wireless Communications, IEEE Transactions on},
volume = {7},
number = {4},
pages = {1255-1263},
abstract = {In this paper the performance of the reverse link of a multicell DS-CDMA system with coexisting open-loop and closed-loop power controlled users transmitting heterogeneous traffic is analyzed. Real-time and non-real-time traffic performance expressions are obtained. The analysis includes a different channel coding scheme for each traffic type selected in accordance to their specific QoS requirements. Moreover, the study takes into account the effect of frequency-selective Nakagami-m fading with arbitrary parameters, correlated log-normal shadowing, power control imperfections and selection-based macroscopic diversity. How the power control imperfections, the number of resolvable paths, or the proportion of simultaneous open-loop and closed-loop power controlled users affect the reverse link capacity of the system is discussed in detail. Analytical results are also given for systems with different processing gains and for propagation environments with different multipath intensity profile (MIP) distributions.},
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In this paper the performance of the reverse link of a multicell DS-CDMA system with coexisting open-loop and closed-loop power controlled users transmitting heterogeneous traffic is analyzed. Real-time and non-real-time traffic performance expressions are obtained. The analysis includes a different channel coding scheme for each traffic type selected in accordance to their specific QoS requirements. Moreover, the study takes into account the effect of frequency-selective Nakagami-m fading with arbitrary parameters, correlated log-normal shadowing, power control imperfections and selection-based macroscopic diversity. How the power control imperfections, the number of resolvable paths, or the proportion of simultaneous open-loop and closed-loop power controlled users affect the reverse link capacity of the system is discussed in detail. Analytical results are also given for systems with different processing gains and for propagation environments with different multipath intensity profile (MIP) distributions.
Ramis, Jaume; Carrasco, Loren; Femenias, Guillem
A two-dimensional Markov model for cross-layer design in AMC/ARQ-based wireless networks Conference
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE, 2008.
@conference{GRECTPPR-042132,
title = {A two-dimensional Markov model for cross-layer design in AMC/ARQ-based wireless networks},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias},
year = {2008},
date = {2008-01-01},
booktitle = {Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE},
pages = {4637-4642},
abstract = {Nowadays, there are lots of research efforts focusing on cross-layer designs combining adaptive modulation and coding (AMC) with an automatic repeat request (ARQ) protocol. One of the main drawbacks of these research works is that they rely on first-order amplitude-based finite-state Markov chains (AFSMC) to model the wireless fading channel. Furthermore, most of the analytical models used in these works present several deficiencies that could compromise the design of cross-layer protocols. To overcome the aforementioned problems, in this paper we propose a novel cross-layer analytical framework that is based on both the use of a first-order two-dimensional Markov model and a judicious implementation of the AMC threshold searching algorithm used in the transmission mode (TM) selection. This threshold search is designed independently from the channel model and is able to discriminate between useful and useless TMs. To exploit the joint impact on QoS performance measures of both AMC and ARQ we present a formulation of an AMC/ARQ cross-layer design as a constrained optimization problem.},
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Nowadays, there are lots of research efforts focusing on cross-layer designs combining adaptive modulation and coding (AMC) with an automatic repeat request (ARQ) protocol. One of the main drawbacks of these research works is that they rely on first-order amplitude-based finite-state Markov chains (AFSMC) to model the wireless fading channel. Furthermore, most of the analytical models used in these works present several deficiencies that could compromise the design of cross-layer protocols. To overcome the aforementioned problems, in this paper we propose a novel cross-layer analytical framework that is based on both the use of a first-order two-dimensional Markov model and a judicious implementation of the AMC threshold searching algorithm used in the transmission mode (TM) selection. This threshold search is designed independently from the channel model and is able to discriminate between useful and useless TMs. To exploit the joint impact on QoS performance measures of both AMC and ARQ we present a formulation of an AMC/ARQ cross-layer design as a constrained optimization problem.
Ramis, Jaume; Carrasco, Loren; Femenias, Guillem
Cross-layer design of multi-rate wireless systems using AMC with ARQ-based error control. A two dimensional Markov model approach Conference
JITEL 2008, Alcalá de Henares, 2008.
@conference{GRECTPPR-042302,
title = {Cross-layer design of multi-rate wireless systems using AMC with ARQ-based error control. A two dimensional Markov model approach},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias},
editor = {Iv\'{a}n Mars \'{a} and Guillermo Ib\'{a}{~n}ez-Fern \'{a} and Juan Velasco-P R \'{e}},
year = {2008},
date = {2008-01-01},
booktitle = {JITEL 2008},
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2007
Ramis, Jaume; Carrasco, Loren; Femenias, Guillem; Riera-Palou, Felip
Scheduling algorithms for 4G wireless networks Conference
IFIP Personal Wireless Communications (PWC 2007), vol. 245, 2007.
@conference{GRECTPPR-037519,
title = {Scheduling algorithms for 4G wireless networks},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias and Felip Riera-Palou},
editor = {B Simak and R Bestak and E Kozowska},
year = {2007},
date = {2007-01-01},
booktitle = {IFIP Personal Wireless Communications (PWC 2007)},
volume = {245},
pages = {264-276},
abstract = {Scheduling algorithms are fundamental components in the process of resource management in mobile communication networks with heterogeneous QoS requirements such as delay, delay jitter, packet loss rate or throughput. The random characteristics of the propagation environment and the use of complex physical layers in order to combat this random behavior further complicates the design of simple, efficient, scalable and fair scheduling algorithms. This paper presents the main criteria used in the design of scheduling algorithms for 3G/4G mobile communications networks and provides a survey of scheduling mechanisms proposed for use in TDMA and CDMA based systems.},
keywords = {},
pubstate = {published},
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Scheduling algorithms are fundamental components in the process of resource management in mobile communication networks with heterogeneous QoS requirements such as delay, delay jitter, packet loss rate or throughput. The random characteristics of the propagation environment and the use of complex physical layers in order to combat this random behavior further complicates the design of simple, efficient, scalable and fair scheduling algorithms. This paper presents the main criteria used in the design of scheduling algorithms for 3G/4G mobile communications networks and provides a survey of scheduling mechanisms proposed for use in TDMA and CDMA based systems.
Ramis, Jaume; Carrasco, Loren; Femenias, Guillem; Riera-Palou, Felip
Scheduling for 4G systems Conference
IFIP Personal Wireless Communications (PWC) 2007, 2007.
@conference{GRECTPPR-038035,
title = {Scheduling for 4G systems},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias and Felip Riera-Palou},
year = {2007},
date = {2007-01-01},
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Ramis, Jaume; Carrasco, Loren; Femenias, Guillem; Riera-Palou, Felip
Simulación dinámica para la evaluación y optimización de los algoritmos de gestión de recursos radio Conference
VI Jornadas de Ingeniería Telemática (JITEL 2007), 2007.
@conference{GRECTPPR-038048,
title = {Simulaci\'{o}n din\'{a}mica para la evaluaci\'{o}n y optimizaci\'{o}n de los algoritmos de gesti\'{o}n de recursos radio},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias and Felip Riera-Palou},
year = {2007},
date = {2007-01-01},
booktitle = {VI Jornadas de Ingenier\'{i}a Telem\'{a}tica (JITEL 2007)},
keywords = {},
pubstate = {published},
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2006
Carrasco, Loren; Ramis, Jaume; Femenias, Guillem
Reverse link average ber of DS-CDMA system with fast and slow power controlled users Journal Article
In: Electronics Letters, vol. 42, pp. 481-483, 2006.
@article{GRECTPAR-527295,
title = {Reverse link average ber of DS-CDMA system with fast and slow power controlled users},
author = {Loren Carrasco and Jaume Ramis and Guillem Femenias},
year = {2006},
date = {2006-01-01},
journal = {Electronics Letters},
volume = {42},
pages = {481-483},
abstract = {Analytical expressions for the average bit error rate in the reverse link of a DS-CDMA system with coexisting fast and slow power controlled users are presented. The combined effects of a frequency selective Nakagami fading channel with an arbitrary multipath intensity profile, the power control error and the use of a cell selection process based on a minimum attenuation criterion are considered.},
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Analytical expressions for the average bit error rate in the reverse link of a DS-CDMA system with coexisting fast and slow power controlled users are presented. The combined effects of a frequency selective Nakagami fading channel with an arbitrary multipath intensity profile, the power control error and the use of a cell selection process based on a minimum attenuation criterion are considered.
Femenias, Guillem; Carrasco, Loren
Effect of slow power control error on the reverse link of OSTBC DS-CDMA in a cellular system with Nakagami frequency-selective MIMO fading Journal Article
In: IEEE Transactions on Vehicular Technology, vol. 55, pp. 1927-1934, 2006.
@article{GRECTPAR-528554,
title = {Effect of slow power control error on the reverse link of OSTBC DS-CDMA in a cellular system with Nakagami frequency-selective MIMO fading},
author = {Guillem Femenias and Loren Carrasco},
year = {2006},
date = {2006-01-01},
journal = {IEEE Transactions on Vehicular Technology},
volume = {55},
pages = {1927-1934},
abstract = {In this paper, the performance of a multicell orthogonal space-time block-coding direct-sequence code-division-multiple-access system with base station diversity is studied for the reverse link in terms of bit error rate, taking into account the effects of frequency-selective Nakagami-m fading with arbitrary parameters, correlated lognormal shadowing, power control imperfections, selection-based macroscopic diversity, and space-time rake receiver diversity. How the transmitter and receiver antenna configuration setups, the number of rake fingers, and the number of resolvable paths affect the reverse-link capacity of the system is discussed in detail. Analytical results are also given for systems with different processing gains and for propagation environments with different multipath intensity profile distributions.},
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In this paper, the performance of a multicell orthogonal space-time block-coding direct-sequence code-division-multiple-access system with base station diversity is studied for the reverse link in terms of bit error rate, taking into account the effects of frequency-selective Nakagami-m fading with arbitrary parameters, correlated lognormal shadowing, power control imperfections, selection-based macroscopic diversity, and space-time rake receiver diversity. How the transmitter and receiver antenna configuration setups, the number of rake fingers, and the number of resolvable paths affect the reverse-link capacity of the system is discussed in detail. Analytical results are also given for systems with different processing gains and for propagation environments with different multipath intensity profile distributions.
Carrasco, Loren; Femenias, Guillem
Redes R-ALOHA DS-CDMA multicelulares con control de potencia rápido sobre canales Nakagami selectivos en frecuencia Journal Article
In: Nov, pp. 44-51, 2006.
@article{GRECTPAR-528556,
title = {Redes R-ALOHA DS-CDMA multicelulares con control de potencia r\'{a}pido sobre canales Nakagami selectivos en frecuencia},
author = {Loren Carrasco and Guillem Femenias},
year = {2006},
date = {2006-01-01},
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Ramis, Jaume; Carrasco, Loren; Femenias, Guillem; Riera-Palou, Felip
Algoritmos de planificación de recursos para redes inalámbricas 4G Conference
XVI JORNADAS TELECOM I+D 2006, 2006.
@conference{GRECTPPR-036637,
title = {Algoritmos de planificaci\'{o}n de recursos para redes inal\'{a}mbricas 4G},
author = {Jaume Ramis and Loren Carrasco and Guillem Femenias and Felip Riera-Palou},
year = {2006},
date = {2006-01-01},
booktitle = {XVI JORNADAS TELECOM I+D 2006},
abstract = {Los algoritmos de planificaci\'{o}n son los componentes fundamentales en el proceso de asignaci\'{o}n de recursos para conseguir el cumplimiento de los requisitos de calidad de servicio. Cuando el dise~no corresponde a redes inal\'{a}mbricas \'{e}ste se complica considerablemente debido a las caracter\'{i}sticas del canal radio: interferencias, desvanecimientos, variaciones de la capacidad, etc. Es por ello que no resulta una tarea f\'{a}cil conseguir una planificaci\'{o}n eficiente y equitativa de los recursos en este tipo de redes. En este art\'{i}culo se describen los criterios de planificaci\'{o}n en redes inal\'{a}mbricas de cuarta generaci\'{o}n y se lleva a cabo una extensa revisi\'{o}n de los mecanismos de planificaci\'{o}n propuestos para las redes TDMA y CDMA.},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Los algoritmos de planificación son los componentes fundamentales en el proceso de asignación de recursos para conseguir el cumplimiento de los requisitos de calidad de servicio. Cuando el dise~no corresponde a redes inalámbricas éste se complica considerablemente debido a las características del canal radio: interferencias, desvanecimientos, variaciones de la capacidad, etc. Es por ello que no resulta una tarea fácil conseguir una planificación eficiente y equitativa de los recursos en este tipo de redes. En este artículo se describen los criterios de planificación en redes inalámbricas de cuarta generación y se lleva a cabo una extensa revisión de los mecanismos de planificación propuestos para las redes TDMA y CDMA.
2005
Carrasco, Loren; Femenias, Guillem
Redes R-ALOHA DS-CDMA multicelulares con control de potencia rápido sobre canales Nakagami selectivos en frecuencia Conference
V Jornadas de Ingeniería Telemática, 2005.
@conference{GRECTPPR-032377,
title = {Redes R-ALOHA DS-CDMA multicelulares con control de potencia r\'{a}pido sobre canales Nakagami selectivos en frecuencia},
author = {Loren Carrasco and Guillem Femenias},
year = {2005},
date = {2005-01-01},
booktitle = {V Jornadas de Ingenier\'{i}a Telem\'{a}tica},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Carrasco, Loren; Femenias, Guillem
Multicell S-ALOHA DS-CDMA networks with fast power control error under frequency-selective Nakagami fading Conference
International Conference on Mobile and Wireless Communications Networks (MWCN05), 2005.
@conference{GRECTPPR-032378,
title = {Multicell S-ALOHA DS-CDMA networks with fast power control error under frequency-selective Nakagami fading},
author = {Loren Carrasco and Guillem Femenias},
year = {2005},
date = {2005-01-01},
booktitle = {International Conference on Mobile and Wireless Communications Networks (MWCN05)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2004
Carrasco, Loren; Femenias, Guillem
Performance Analysis of multicell S-ALOHA DS-CDMA networks over Nakagami frequency selective fading channels with power control error Conference
IEEE 15th International Simposium on Personal, Indoor and Mobile Radio Communications (PIMRC04), 2004.
@conference{GRECTPPR-029333,
title = {Performance Analysis of multicell S-ALOHA DS-CDMA networks over Nakagami frequency selective fading channels with power control error},
author = {Loren Carrasco and Guillem Femenias},
year = {2004},
date = {2004-01-01},
booktitle = {IEEE 15th International Simposium on Personal, Indoor and Mobile Radio Communications (PIMRC04)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2003
Carrasco, Loren; Femenias, Guillem; Raja, F
A new MAC protocol ensuring the multimedia traffic QoS for CDMA networks Journal Article
In: Wireless Personal Communications, vol. 25, pp. 205-221, 2003.
@article{GRECTPAR-521105,
title = {A new MAC protocol ensuring the multimedia traffic QoS for CDMA networks},
author = {Loren Carrasco and Guillem Femenias and F Raja},
year = {2003},
date = {2003-01-01},
journal = {Wireless Personal Communications},
volume = {25},
pages = {205-221},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Femenias, Guillem; Ferrer-Gomila, J L; Carrasco, Loren
DARWIN: Demonstrator for an Adaptive and Reconfigurable Wireless IP Network Journal Article
In: Lecture Notes in Computer Science, vol. 2775, pp. 182-187, 2003.
@article{GRECTPAR-521106,
title = {DARWIN: Demonstrator for an Adaptive and Reconfigurable Wireless IP Network},
author = {Guillem Femenias and J L Ferrer-Gomila and Loren Carrasco},
year = {2003},
date = {2003-01-01},
journal = {Lecture Notes in Computer Science},
volume = {2775},
pages = {182-187},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carrasco, Loren; Femenias, Guillem
Análisis de estabilidad en redes de comunicaciones que usan ALOHA ranurado DS-CDMA Conference
JITEL'03, 2003.
@conference{GRECTPPR-020996,
title = {An\'{a}lisis de estabilidad en redes de comunicaciones que usan ALOHA ranurado DS-CDMA},
author = {Loren Carrasco and Guillem Femenias},
year = {2003},
date = {2003-01-01},
booktitle = {JITEL'03},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Femenias, Guillem; Ferrer, J L; Carrasco, Loren
DARWIN: Demostrator for an Adaptative and Reconfigurable Wireless IP Network Conference
Personal Wireless Communications (PWC'03), 2003.
@conference{GRECTPPR-020998,
title = {DARWIN: Demostrator for an Adaptative and Reconfigurable Wireless IP Network},
author = {Guillem Femenias and J L Ferrer and Loren Carrasco},
year = {2003},
date = {2003-01-01},
booktitle = {Personal Wireless Communications (PWC'03)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2002
Carrasco, Loren; Femenias, Guillem
Stability Analysis of Slotted Aloha DS CDMA Communication Networks Conference
ICWN'02 International Conference on Wireless Networks, 2002.
@conference{GRECTPPR-015428,
title = {Stability Analysis of Slotted Aloha DS CDMA Communication Networks},
author = {Loren Carrasco and Guillem Femenias},
year = {2002},
date = {2002-01-01},
booktitle = {ICWN'02 International Conference on Wireless Networks},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2001
Carrasco, Loren; Femenias, Guillem
CDMAC, un protocolo de acceso al medio para sistemas CDMA multimedia Conference
Jornadas de Ingenieria Telem, 2001.
@conference{GRECTPPR-029338,
title = {CDMAC, un protocolo de acceso al medio para sistemas CDMA multimedia},
author = {Loren Carrasco and Guillem Femenias},
year = {2001},
date = {2001-01-01},
booktitle = {Jornadas de Ingenieria Telem},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
2000
Carrasco, Loren; Femenias, Guillem
WCDMA MAC protocol for multimedia traffic support Conference
IEEE Vehicular Technology Conference (VTC2000-Spring), 2000.
@conference{GRECTPPR-015424,
title = {WCDMA MAC protocol for multimedia traffic support},
author = {Loren Carrasco and Guillem Femenias},
year = {2000},
date = {2000-01-01},
booktitle = {IEEE Vehicular Technology Conference (VTC2000-Spring)},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
1999
Carrasco, Loren; Femenias, Guillem
Protocolos de acceso al medio para tráfico multimedia en redes de comunicaciones móviles Conference
Jornadas de Ingenieria Telem, 1999.
@conference{GRECTPPR-029339,
title = {Protocolos de acceso al medio para tr\'{a}fico multimedia en redes de comunicaciones m\'{o}viles},
author = {Loren Carrasco and Guillem Femenias},
year = {1999},
date = {1999-01-01},
booktitle = {Jornadas de Ingenieria Telem},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Akyildiz, I; Mcnair, J; Carrasco, Loren; Puigjaner, R; Yesha, S
Medium Acces protocols for Multimedia Traffic in Wireless Networks Journal Article
In: IEEE Network, vol. 13, pp. 39-47, 1999.
@article{GRECTPAR-523371,
title = {Medium Acces protocols for Multimedia Traffic in Wireless Networks},
author = {I Akyildiz and J Mcnair and Loren Carrasco and R Puigjaner and S Yesha},
year = {1999},
date = {1999-01-01},
journal = {IEEE Network},
volume = {13},
pages = {39-47},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
1995
Vriendt, J; Carrasco, Loren; Roovers, A
UMTS BSS Architecture Design Conference
RACE Mobile Summit’95, 1995.
@conference{GRECTPPR-029343,
title = {UMTS BSS Architecture Design},
author = {J Vriendt and Loren Carrasco and A Roovers},
year = {1995},
date = {1995-01-01},
booktitle = {RACE Mobile Summit’95},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
1994
Pizarroso, M; Carrasco, Loren; Gavilan, J
Capacidad en sistemas de comunicaciones móviles basados en DS-CDMA en distintos ambientes celulares Conference
TELECOM I+D '94, 1994.
@conference{GRECTPPR-029341,
title = {Capacidad en sistemas de comunicaciones m\'{o}viles basados en DS-CDMA en distintos ambientes celulares},
author = {M Pizarroso and Loren Carrasco and J Gavilan},
year = {1994},
date = {1994-01-01},
booktitle = {TELECOM I+D '94},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
1993
Carrasco, Loren; Berberana, I
El handover, un servicio de la red inteligente Journal Article
In: Comunicaciones de Telefónica I+D, vol. 4, pp. 54-60, 1993.
@article{GRECTPAR-523373,
title = {El handover, un servicio de la red inteligente},
author = {Loren Carrasco and I Berberana},
year = {1993},
date = {1993-01-01},
journal = {Comunicaciones de Telef\'{o}nica I+D},
volume = {4},
pages = {54-60},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carrasco, Loren; Pizarroso, M
Simulación de un sistema de Comunicaciones móviles basado en técnicas de acceso CDMA Conference
URSI'93, 1993.
@conference{GRECTPPR-029340,
title = {Simulaci\'{o}n de un sistema de Comunicaciones m\'{o}viles basado en t\'{e}cnicas de acceso CDMA},
author = {Loren Carrasco and M Pizarroso},
year = {1993},
date = {1993-01-01},
booktitle = {URSI'93},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Carrasco, Loren; Berberana, I
El handover como un servicio de red inteligente Conference
TELECOM I+D 93, 1993.
@conference{GRECTPPR-029342,
title = {El handover como un servicio de red inteligente},
author = {Loren Carrasco and I Berberana},
year = {1993},
date = {1993-01-01},
booktitle = {TELECOM I+D 93},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
