Vicent Pla

Universitat Politècnica de València

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Jorge Martinez–Bauset

Universitat Politècnica de València

Luis Guijarro

Universitat Politècnica de València

Vicente Casares‐Giner

Universitat Politècnica de València

José R. Vidal

Fundación para el Fomento de la Innovación Industrial

Luis Tello-Oquendo

Universidad Nacional de Chimborazo

José Manuel Giménez-Guzmán

Universitat Politècnica de València

Israel Leyva‐Mayorga

Aalborg University

Elena Bernal-Mor

Universitat Politècnica de València

Frank Y. Li

University of Agder

José-Ramón Vidal

Universitat Politècnica de València

Cooperative Institutions

Universitat Politècnica de València

Universitat Politècnica de Catalunya

University of Agder

Instituto Politécnico Nacional

Georgia Institute of Technology

Ghent University

Universitat de València

Universidad Carlos III de Madrid

Lanzhou University of Technology

Centre National de la Recherche Scientifique

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Dynamic Spectrum Reservation for CR Networks in the Presence of Channel Failures: Channel Allocation and Reliability Analysis

IEEE Transactions on Wireless Communications (2017)

Indika A. M. Balapuwaduge Frank Y. Li Vicent Pla

Providing channel access opportunities for new service requests and guaranteeing continuous connections for ongoing flows until service completion are two challenges for service provisioning in wireless networks. Channel failures, which are typically caused by hardware and software failures or/and by intrinsic instability in radio transmissions, can easily result in network performance degradation. In cognitive radio networks (CRNs), secondary transmissions are inherently vulnerable to connection breaks due to licensed users' arrivals as well as channel failures. To explore the advantages of channel reservation on performance improvement in error-prone channels, we propose and analyze a dynamic channel reservation (DCR) algorithm and a dynamic spectrum access (DSA) scheme with three access privilege variations. The key idea of the DCR algorithm is to reserve a dynamically adjustable number of channels for the interrupted services to maintain service retainability for ongoing users or to enhance channel availability for new users. Furthermore, the DCR algorithm is embedded in the DSA scheme enabling spectrum access of primary and secondary users with different access privileges based on access flexibility for licensed shared access. The performance of such a CRN in the presence of homogeneous and heterogeneous channel failures is investigated considering different channel failure and repair rates.

Channel allocation schemes

Control channel

Provisioning

10.1109/twc.2017.2772240

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Citations (40)

Discrete Time Analysis of Cognitive Radio Networks with Saturated Source of Secondary Users

Lecture notes in computer science (2011)

Attahiru Sule Alfa Vicent Pla Jorge Martinez–Bauset Vicente Casares‐Giner

White spaces

Value (mathematics)

10.1007/978-3-642-23041-7_1

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Citations (6)

On the maximum performance in opportunistic routing

Lloreng Cerda-Alabern Amir Darehshoorzadeh Vicent Pla

In recent years there has been a growing interest in Opportunistic Routing as a way to increase the capacity of wireless networks by exploiting its broadcast nature. By contrast to traditional uni-path routing, in opportunistic routing the nodes overhearing neighbor's transmissions can become candidates to forward the packets towards the destination. In this paper we address the question: What is the maximum performance that can be obtained using opportunistic routing? To answer this question we use an analytical model that allows to compute the optimal position of the nodes, such that the progress towards the destination is maximized. We use this model to compute bounds to the minimum expected number of transmissions that can be achieved in a network using opportunistic routing.

Equal-cost multi-path routing

Multipath routing

Geographic routing

Policy-based routing

Triangular routing

10.1109/wowmom.2010.5534897

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Citations (13)

Optimal radio access technology selection on heterogeneous networks

Physical Communication (2012)

Diego Pacheco-Paramo Vicent Pla Vicente Casares‐Giner Jorge Martinez–Bauset

Blocking (statistics)

Admission control

Radio access technology

10.1016/j.phycom.2012.02.009

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Citations (8)

Vertical handover decision algorithm in heterogeneous wireless networks

International Journal of Internet Protocol Technology (2017)

Wafa Benaatou Adnane Latif Vicent Pla

With the recent progress in the area of cellular communication the issue of inter cells handover without dropping an ongoing connection with the base station has arisen. In this paper, the focus is on the performance of vertical handover. Various proposed interconnection architectures for vertical handover in heterogeneous networks were studied. Two different algorithms to make the decision on when and to which network perform a handover were considered. In the first of them the decision is based on the received signal strength (RSS). In the second one a fuzzy logic system that uses RSS, bandwidth, battery power and packet loss as the input parameters is proposed. The simulation results show that the algorithm based on fuzzy logic leads to a reduction of the number of handovers and a minimisation of the power consumption as compared to the first algorithm used here and the existing algorithms.

RSS

Vertical Handover

10.1504/ijipt.2017.088914

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Citations (2)

Optimal Admission Control in Mobile Cellular Networks with Movement Prediction

IEEE Latin America Transactions (2006)

José Manuel Giménez-Guzmán Jorge Martinez–Bauset Vicent Pla Vicente Casares‐Giner

In this paper we study the impact of incorporating handover prediction information into the session admission control process in mobile cellular networks. The comparison is done between the performance of optimal policies obtained with and without the predictive information. A prediction agent classifies mobile users into two classes, those that will probably produce a handover to and/or from the cell under study and those that probably will not produce such handover. Moreover, the time instant has also been used in the prediction by means of a deterministic size window. Two different approaches to compute the optimal admission policy were studied: dynamic programming and reinforcement learning. Results show significant performance gains when the incoming predictive information is used in the admission process, and that higher gains are obtained when temporal information is used.

Model Predictive Control

Admission control

10.1109/tla.2006.4472149

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Citations (3)

Price competition between a macrocell and a small-cell service provider with limited resources and optimal bandwidth user subscription: a game-theoretical model

Telecommunication Systems (2017)

Julián Romero Luis Guijarro Vicent Pla José R. Vidal

Macrocell

Stackelberg competition

Subgame perfect equilibrium

Strategy

10.1007/s11235-017-0331-2

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Citations (5)

Análisis de Desempeño de un Protocolo para Redes Inalámbricas de Sensores Basado en TDMA con Capacidades de Radio Cognoscitivo

Revista Iberoamericana de Automática e Informática Industrial RIAI (2016)

Israel Leyva‐Mayorga Mario E. Rivero-Ángeles Chadwick Carreto Arellano Vicent Pla

The main objective of Cognitive Radio (CR) is optimizing spectrum utilization in multi-carrier systems and has been studied to increase performance in wireless sensor networks (WSN). Special attention has been given to quality of service (QoS) parameters such as energy consumption, average report delay and collision probability. However, some issues have not received enough attention due to the fact that nodes tend to be lowerend devices with limited capabilities, therefore, traditional CR techniques may not be implemented efficiently. CR allows secondary users (SUs, nodes that have no license over the operation band) to use the channel in an opportunistic manner as long as they do not cause significant interference on the primary users (PUs, nodes with a specific license over the allocated band). This is achieved by sensing the channel and identifying vacant bands to make use of them dynamically. In this paper, the WISPER protocol is studied, which is a WSN protocol capable of performing both, continuous monitoring (CntM) and event driven detection (EDD) duties by implementing a singleband CR scheme in order to identify the operational parameters that enhance both, energy consumption and data transmission in highly saturated environments. Results show that, by carefully selecting frame length and state-switching rates, average discarded packets and power consumption are optimized.

10.1016/j.riai.2015.11.003

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Citations (2)

Modeling and comparison of candidate selection algorithms in opportunistic routing

Computer Networks (2011)

Amir Darehshoorzadeh Llorenç Cerdà‐Alabern Vicent Pla

Routing algorithm

Selection algorithm

10.1016/j.comnet.2011.06.009

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Citations (39)

Fair Cost Sharing Under Platform Two-Sided Intermediation