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  • Grup de Recerca de Comunicacions Mòbils (GRCM)

     Casadevall Palacio, Fernando-jose; Sallent Roig, Jose Oriol; Pérez Romero, Jordi; Ferrús Ferré, Ramon; Umbert Juliana, Anna; Sanchez Gonzalez, Juan; Koutlia, Aikaterini; Raschella, Alessandro; Lu, Chengsui; Agusti Comes, Ramon
    Competitive project

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  • Redes móviles eficientes para la ampliación de servicios a nuevos sectores profesionales

     Agusti Comes, Ramon; Casadevall Palacio, Fernando-jose; Umbert Juliana, Anna; Sanchez Gonzalez, Juan; Pérez Romero, Jordi; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol
    Competitive project

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  • D2.2.1 - Draft security requirements

     Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol
    Date: 2013-11-28
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    Communications security is a central aspect of the ISITEP framework for inter-system interoperability between TETRA and TETRAPOL networks. Ensuring that threats to the interconnected communications systems and terminals are sufficiently and appropriately reduced by technical, procedural and environmental countermeasures is vital to realise the trusted and secure communication system needed for the pursued PPDR transnational cooperation activities. In this context, ISITEP Work Package 2.2 (WP2.2) ¿Security Requirements¿ is aimed at establishing the set of security requirements needed to drive the development of the security architecture and its components. This first deliverable from WP2.2 provides a description of the preliminary framework and methodology defined to carry out the development of the security requirements. The framework includes aspects such as the identification of the ISITEP system components and players that are relevant for the security analysis, and the definition of security objectives. On this basis, the document also conducts a first assessment to delineate the state-of-the-art of the security features existing in current PPDR technologies and networks, security procedures carried out by PPDR end-users and operators in order to realise the trusted and secure communication system needed in national PPDR networks, and to provide an overview of the regulatory and legislation framework that impacts affects PPDR communication networks. Finally, a preliminary assessment of security threats to ISITEP system is also reported. The assessment is focused on those security threats that are relevant to the new communications capabilities brought by the ISITEP solution in terms of service interworking across multiple national networks and terminal roaming.

    Communications security is a central aspect of the ISITEP framework for inter-system interoperability between TETRA and TETRAPOL networks. Ensuring that threats to the interconnected communications systems and terminals are sufficiently and appropriately reduced by technical, procedural and environmental countermeasures is vital to realise the trusted and secure communication system needed for the pursued PPDR transnational cooperation activities. In this context, ISITEP Work Package 2.2 (WP2.2) “Security Requirements” is aimed at establishing the set of security requirements needed to drive the development of the security architecture and its components. This first deliverable from WP2.2 provides a description of the preliminary framework and methodology defined to carry out the development of the security requirements. The framework includes aspects such as the identification of the ISITEP system components and players that are relevant for the security analysis, and the definition of security objectives. On this basis, the document also conducts a first assessment to delineate the state-of-the-art of the security features existing in current PPDR technologies and networks, security procedures carried out by PPDR end-users and operators in order to realise the trusted and secure communication system needed in national PPDR networks, and to provide an overview of the regulatory and legislation framework that impacts affects PPDR communication networks. Finally, a preliminary assessment of security threats to ISITEP system is also reported. The assessment is focused on those security threats that are relevant to the new communications capabilities brought by the ISITEP solution in terms of service interworking across multiple national networks and terminal roaming.

    Entregable del projecte de recerca ISITEP

  • Inter System Interoperability for Tetra-TetraPol Networks

     Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol
    Competitive project

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    Visión prospectiva de las comunicaciones móviles de seguridad pública y emergencias  Open access

     Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Agusti Comes, Ramon
    Simposium Nacional de la Unión Científica Internacional de Radio
    Presentation's date: 2013-09-12
    Presentation of work at congresses

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    El acceso a servicios de banda ancha móvil es fundamental para mejorar la eficiencia y efectividad de las comunicaciones de seguridad pública y emergencias. En este artículo se defiende que el modelo de comunicaciones actual, caracterizado por el uso de ¿tecnologías dedicadas, redes dedicadas y espectro dedicado¿, no es válido para sustentar la necesaria evolución de los servicios y sistemas de comunicaciones utilizados hoy en día por las organizaciones PPDR (Public Protection and Disaster Relief). A tal efecto, en el artículo se establecen y desarrollan los tres principios clave que, en opinión de los autores, son fundamentales para posibilitar y cimentar dicha evolución: (1) aprovechamiento de las tecnologías del entorno comercial; (2) explotación de estrategias de compartición de infraestructura y redes; y (3) incorporación de principios de compartición de espectro entre PPDR y otras aplicaciones.

    El acceso a servicios de banda ancha móvil es fundamental para mejorar la eficiencia y efectividad de las comunicaciones de seguridad pública y emergencias. En este artículo se defiende que el modelo de comunicaciones actual, caracterizado por el uso de tecnologías dedicadas, redes dedicadas y espectro dedicado , no es válido para sustentar la necesaria evolución de los servicios y sistemas de comunicaciones utilizados hoy en día por las organizaciones PPDR (Public Protection and Disaster Relief). A tal efecto, en el artículo se establecen y desarrollan los tres principios clave que, en opinión de los autores, son fundamentales para posibilitar y cimentar dicha evolución: (1) aprovechamiento de las tecnologías del entorno comercial; (2) explotación de estrategias de compartición de infraestructura y redes; y (3) incorporación de principios de compartición de espectro entre PPDR y otras aplicaciones.

  • A new cell selection algorithm for mobile networks with limited backhaul capacity

     Olmos Bonafé, Juan José; Ferrús Ferré, Ramon; Galeana Zapien, Hiram
    European Cooperation in the Fiel of Scientific and Techinical Research
    Presentation's date: 2013-09-26
    Presentation of work at congresses

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    With the progressive deployment of high throughput radio access technologies (HSPA, LTE, WiMAX), the backhaul capacity can become a potential bottleneck in some scenarios. While more cost-efficient transmission technologies are needed to increase the capacity of the mobile backhaul, it¿s is also important to consider optimization techniques to get the most out of the available backhaul capacity at any moment. In this paper we develop an analytical model aimed at evaluating the performance of cell selection strategies for mobile networks with backhaul capacity constraints. The analytical model is used to evaluate the performance of a novel backhaul-aware cell selection algorithm and compare it with classical schemes based exclusively on radio information. Obtained results show that the proposed algorithm can achieve a utilization of backhaul resources higher than the traditional cell selection schemes while providing the same radio interface performance. Analytical results have been verified by means of simulation.

  • Proposal and evaluation of channel assignment algorithms for wireless local area networks with opportunistic spectrum access capabilities.

     Novillo Parales, Francisco Vicente
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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    La creixent necessitat de connectivitat sense fils està impulsant l'adopció massiva de la tecnologia Wi-Fi basada en l'estàndard IEEE 802.11 i la proliferació d¿escenaris on es concentren una elevat nombre de punts d'accés (AP, per les seves sigles en anglès) en àrees d¿alta concentració d¿usuaris com zones residencials o d¿oficines. Es preveu que pel 2016, més de la meitat del tràfic d'Internet al món procedirà de connexions Wi-Fi. Aquest augment de desplegaments densos origina alts nivells d'interferència en les bandes sense llicència (i.i. bandes ISM) utilitzades per les xarses sense fils (WLANs, per les seves sigles en anglès), que poden resultar en una degradació impredictible en el rendiment de la xarxa i la falta d'equitat entre APs. Els mecanismes d'assignació de canal són l'eina central utilitzada avui dia per mitigar els problemes d'interferència en la banda ISM causats per APs veïns. Independentment de la capacitat d'aquests mecanismes per millorar el rendiment de les WLANs, la quantitat d'espectre disponible en bandes ISM per a ús de WLANs és un factor limitant en desplegaments densos. Així, l'explotació de porcions addicionals de bandes assignades a una aplicació o servei en particular, que estiguin sense utilitzar o desocupades en llocs i horaris específics pot millorar el rendiment de les WLANs. Aquest concepte d'ús de l'espectre conegut com a accés d'espectre oportunista (OSA, per les seves sigles en anglès) permet als usuaris secundaris compartir les mateixes freqüències usades pels usuaris primaris sempre que els serveis primaris no siguin pertorbats.Aquesta tesi estudia les possibilitats i beneficis derivats de la introducció de mecanismes OSA en el funcionament de les WLANs. La tesi proporciona dues contribucions principals.La primera contribució és el desenvolupament de la formulació i avaluació de la disponibilitat espacial d'un cert segment d'espectre dins d'ubicacions interiors en zones urbanes denses amb la finalitat de ser explotat per WLANs amb capacitats OSA. Per a això, les condicions d'interferència entre els usuaris primaris i secundaris han estat establertes, juntament amb models de propagació necessaris per representar les pèrdues en exteriors, interiors i d¿exteriors a interiors. Considerant un sistema primari amb cobertura per exteriors, s¿ha obtingut el percentatge de localitzacions interiors on els usuaris secundaris puguin reutilitzar la banda primària sense interferir amb el sistema primari.La segona contribució és la proposta, desenvolupament i avaluació d'algorismes d'assignació de canal que permeten a les WLANs operar en canals disponibles en ISM i en bandes d'espectre habilitades per OSA. A diferència dels esquemes clàssics, els algorismes proposats aborden dos aspectes distintius: la priorització de canals entre les bandes ISM i OSA, i l'heterogeneïtat de l'espectre en el APs. A tal efecte, s¿ha desenvolupat un model per descriure i representar els principals components que intervenen en un escenari WLAN habilitat amb OSA. El model permet determinar els canals primaris disponibles en els APs i definir les restriccions d'assignació de canal. La tesi ha formulat primer el problema d'assignació de canal per WLANs habilitades amb OSA com un problema de binary linear programming (BLP), del que s¿han obtingut solucions òptimes mitjançant algorismes de branch and bound (BB). Motivats per la necessitat de tenir algorismes computacionalment més eficients que el BB, s¿han proposat diversos algorismes centralitzats i distribuïts, englobant tècniques de simulated annealing (SA) i la construcció d'un mínimum spanning tree (MST) per reduir el nivell d'acoblament entre APs veïns. Els algorismes han estat avaluats sota diferents condicions de densitat de APs i disponibilitat d'espectre i comparats a la solució òptima així com a algorismes clàssics utilitzats en WLAN sense OSA.

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    Performance evaluation of synergic operation of algorithms enabling opportunistic networks - D4.3  Open access

     Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Bouali, Faouzi; Ferrús Ferré, Ramon; Agusti Comes, Ramon; Gebert, Jens; Fuchs, Rolf; Demestichas, Panagiotis; Georgakopoulos, Andreas; Stavroulaki, Vera; Kritikou, Yiouli; Tzifa, Lia; Koutsouris, Nikos; Karvounas, Dimitrios; Logothetis, Marios; Sarli, Asimina; Papadopoulou, Louisa-Magdalene; Galani, Aristi; Vlacheas, Panagiotis; Morakos, Petros; Antzoulatos, Alexandros; Tosic, Milenko; Boskovic, Dragan; Chen, Xianfu; Pega, Stéphane; Bourdellès, Michel; Vahid, Seiamak; Bagayoko, Abdoulaye; Mouton, Christian; Delsol, Thomas; Panaitopol, Dorin; Ainwaimi, Ghassan; Tsagkaris, Kostas; Sarvanko, Heli; Cirilovic, Mirko; Riaz, Maryam; Lee, Haeyoung; Moreno, Oscar; Bantouna, Aimilia
    Date: 2012-12-31
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    Deliverable D4.3 del projecte OneFIT

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    The evolution of public safety communications in Europe: the results from the FP7 HELP project  Open access

     Baldini, Gianmarco; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Hirst, Paul; Delmas, Serge; Pisz, Rafal
    ETSI Workshop on Reconfigurable Radio Systems
    p. 1-10
    Presentation's date: 2012-12-12
    Presentation of work at congresses

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    This paper describes the results from the FP7 HELP project, which investigated the potential of emerging wireless communication technologies and potential synergies between mobile public safety and commercial networks to enhance the communication capabilities of public safety users. The paper identifies the current trends and challenges for wireless communications in the public safety domain, the potential solution frameworks identified in the HELP project and an economic analysis to show the benefits in terms of cost saving. The paper also describes the related research activities of the European Commission in this area.

  • Performance assessment & synergic operation of algorithmic solutions enabling opportunistic networks¿ D4.2

     Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Bouali, Faouzi; Ferrús Ferré, Ramon; Karvounas, Dimitrios; Georgakopoulos, Andreas; Stavroulaki, Vera; Demestichas, Panagiotis; Tosic, Milenko; Boskovic, Dragan; Matinmikko, Marja; Fuchs, Rolf; Gebert, Jens; Vahid, Seiamak; Bourdellès, Michel; Riaz, Maryam; Alnwaimi, Ghassan; Shariat, Shahin; Bagayoko, Abdoulaye; Mouton, Christian; Rakotoharison, Lanto; Tsagkaris, Kostas; Sarvanko, Heli; Panaitopol, Dorin; Lee, Haeyoung; Moreno, Oscar
    Date: 2012-06
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    Protocols, performance assessment and consolidation on interfaces for standardization ¿ D3.3  Open access

     Filo, Marcin; Wierzbowsi, Tomasz; Gebert, Jens; Wich, Andreas; Jactat, Caroline; Lécroart, Benoit; Mouton, Christian; Haeyoung, Lee; Vahid, Seiamak; Bouali, Faouzi; Ferrús Ferré, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Demestichas, Panagiotis; Georgakopoulos, Andreas; Karvounas, Dimitrios; Koutsouris, Nikos; Stavroulaki, Vera; Tsagkaris, Kostas; Matinmikko, Marja; Sarvanko, Heli
    Date: 2012-06
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    The following document presents a detailed description of the protocol for the “ Control Channels for the Cooperation of the Cognitive Management System ” (C4MS) which provides the necessary means to enable proper management of Opportunistic Networks. Additionally, the document defines the methodology that was applied for the purpose of signalling evaluation. The protocol overview presented in section 2 of the main document, provides the C4MS principles. The section includes, among others, the description of the protocol identifiers, procedures, protocol state machines and message format as well as the security asp ects. Section 3 provides a high-level description of the data structures defined within the scope of OneFIT project. The data structures are classified into five categories, i.e.: Profiles, Context, Decisions,Knowledge and Policies. The high level description is complemented by some detailed data structures in the Appendix to D3.3 Section 3[10]. Section 4 provides details on the evaluation methodology applied for the purpose of C4MS performance assessment. The section presents the evaluation plan along with a description of metrics that are to be exploited in the scope of WP3. Section 5 and Section 6 are composed of the signalling evaluation results. Section 5 focuses on the estimation of the signalling load imposed by ON management in different ON phases. Additionally some results for the initialization phase (not explicitly mentioned in the previous phases of the project)and security related aspects are also depicted. Section 6 on the other hand is focused on the evaluation of the signalling traffic generated by different ON related algorithms. Conclusions to the document are drawn in section 7. Detailed description of the C4MS procedures, implementation options based on IEEE 802.21, DIAMTER and 3GPP are depicted in the appendix to the D3.3[10] . Additionally, the appendix incorporates the detailed definition of the information data structures and final set of Message Sequence Charts (MSCs) provided for the OneFIT project.

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    Validation platform implementation description ¿ D5.2  Open access

     Tosic, Milenko; Ikovic, Ognjen; Boskovic, Dragan; Cirilovic, Mirko; Gebert, Jens; Fuchs, Rolf; Wich, Andreas; Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Ferrús Ferré, Ramon; Raschella, Alessandro; Karvounas, Dimitrios; Georgakopoulos, Andreas; Stavroulaki, Vera; Koutsouris, Nikos; Demestichas, Panagiotis; Mueck, Markus; Drewes, Christian; Tsagkaris, Kostas; Mouton, Christian; González, José Luis; Delsol, Thomas; Moreno, Oscar; Moser, Guenter
    Date: 2012-06
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    Deliverable D5.2 del projecte OneFIT

  • D3.2 System concept for enhanced communications in emergencies

     Baldini, Gianmarco; Delmas, Serge; El Shabrawy, Karim; Ferrús Ferré, Ramon; Goratti, Leonardo; Pisz, Rafal; Sallent Roig, Jose Oriol; Sroka, Krystian; Stefanski, Szymon
    Date: 2011-12-09
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  • D4.2 Workshop#1 report

     Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Baldini, Gianmarco; El Shabrawy, Karim; Sroka, Krystian; Pisz, Rafal; Hirst, Paul
    Date: 2011-11-20
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  • D1.3 Interim progress report

     Baldini, Gianmarco; Delmas, Serge; Ferrús Ferré, Ramon; Hirst, Paul; Pisz, Rafal; Sallent Roig, Jose Oriol
    Date: 2011-10-07
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    Control channels for the cooperation of cognitive management systems in opportunistic and composite wireless networks  Open access

     Stavroulaki, Vera; Georgakopoulos, Andreas; Demestichas, Panagiotis; Ferrús Ferré, Ramon; Filo, Marcin; Tsagkaris, Kostas
    Cognitive Radio and Networking for Cooperative Coexistence of Heterogeneous Wireless Networks
    p. 1-2
    Presentation's date: 2011-10-06
    Presentation of work at congresses

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    Opportunistic Networks (ONs) are assumed to be temporary, localized extensions of the infrastructure network that are created under certain circumstances. According to that vision, ONs are coordinated by the radio access network (RAN) operator which governs the overal system behaviour (e.g. ON related policies), provides the neccessary resources (e.g. dedicated specturm bands) and supports users in decision making (e.g. additional knowledge and context information). ONs comprise both nodes of the infrastructure and infrastructure-less devices. For the management and control of operator-governed ONs the introduction of Cognitive Management Systems (CMSs), localized on the terminal and infrastructure side, is proposed. The cooperation of CMS entities will require existence of well-defined control channels. In order to enable the necessary signalling between the CMS entities, Control Channels for the Cooperation of the Cognitive Management Systems (C4 MS) are proposed.

  • D3.1 Analysis of network and spectrum sharing solutions

     Baldini, Gianmarco; Delmas, Serge; Ferrús Ferré, Ramon; Goratti, Leonardo; Pisz, Rafal; Sallent Roig, Jose Oriol; Sroka, Krystian; Stefanski, Szymon
    Date: 2011-09-09
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    Validation platform specification ¿ D5.1  Open access

     Gebert, Jens; Lange, Christian; Wich, Andreas; Georgakopoulos, Andreas; Demestichas, Panagiotis; Stavroulaki, Vera; Karvounas, Dimitrios; Akezidou, Maria; Logothetis, Marios; Thomatos, Evangelos; Koutsouris, Nikos; Kritikou, Yiouli; Bantouna, Aimilia; Moreno, Oscar; Visiedo, David; Martin, Oscar; Mueck, Markus; Nehring, Florian; Moser, Guenter; Mouton, Christian; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Boskovic, Dragan; Tosic, Milenko; Ikovic, Ognjen; Tsagkaris, Kostas; Tzifa, Lia; Drewes, Christian
    Date: 2011-09-30
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    The present deliverable introduces the OneFIT Proof-of-Concept (PoC) Architecture which will be used as a basis for the validation platform development throughout the project. This PoC Architecture proposal is validated by identifying the roles of the various components in the framework of the OneFIT Scenarios as derived and detailed in WP2. The applied methodology ensures that all required features are appropriately considered. Furthermore, the hardware components available to the project are detailed which are the basis for the development of an integrated validation platform. Their role is highlighted by an instantiation step which maps the PoC Architecture components to the identified hardware components. Finally, a scenario instantiation is derived which illustrates the role of the various hardware components for the validation of selected OneFIT scenarios.

    Deliverable D5.1 del projecte Europeu OneFIT (ICT-2009-257385)

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    Deliverable D3.2 - Information definition and signalling flows  Open access

     Gebert, Jens; Wich, Andreas; Filo, Marcin; Sroka, Milosz; Wierzbowsi, Tomasz; Muck, Markus; Mouton, Christian; Vahid, Seiamak; Ferrús Ferré, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Demestichas, Panagiotis; Georgakopoulos, Andreas; Karvounas, Dimitrios; Logothetis, Marios; Stavroulaki, Vera; Matinmikko, Marja; Mustonen, Miia; Tsagkaris, Kostas; Sarvanko, Heli; Schmidt, Andreas
    Date: 2011-09
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    The purpose of this deliverable is to define information to be exchanged in OneFIT system based on algorithms for the management of pportunistic networks and to design message sequence charts describing the signalling flows for supporting the management of opportunistic network. To further elaborate on the information exchange, this eliverable will introduce a preliminary state machine as well as information exchange strategies as they are envisaged in the OneFIT project.

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    Cognitive control channels for the cooperation of opportunistic and composite wireless networks  Open access

     Gebert, Jens; Georgakopoulos, Andreas; Stavroulaki, Vera; Ferrús Ferré, Ramon; Demestichas, Panagiotis; Tsagkaris, Kostas
    European Signal Processing Conference
    p. 2289-2293
    Presentation's date: 2011-09-02
    Presentation of work at congresses

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    Opportunistic networks (ONs) are considered as coordinated extensions of a radio access network infrastructure, which are dynamically and temporarily created in an infrastructure-less manner in order to increase service reachability, improve resource utilization efficiency and facilitate localised service provisioning. The realization of the ON concept relies on the existence of control channels which will provide necessary signalling for the coordination of the ON nodes. Proposed control channels are conceived as an evolution of the already established cognitive pilot channel concept. As a result, new interfaces are discussed in order to convey information from the infrastructure to the terminals and vice versa or between terminals. Finally, the business benefits of the aforementioned approach are provided in order to strengthen the notion of the proposed control channels and consider future expansions.

  • D2.2 Definition of system requirements

     Baldini, Gianmarco; Delmas, Serge; Ferrús Ferré, Ramon; Goratti, Leonardo; Hirst, Paul; Pisz, Rafal; Sallent Roig, Jose Oriol; Sroka, Krystian
    Date: 2011-08-07
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  • Information definition for the integrated C4MS - M3.2

     Gebert, Jens; Filo, Marcin; Sroka, Milosz; Muck, Markus; Mouton, Christian; Vahid, Seiamak; Ferrús Ferré, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Demestichas, Panagiotis; Georgakopoulos, Andreas; Karvounas, Dimitrios; Logothetis, Marios; Stavroulaki, Vera; Matinmikko, Marja; Mustonen, Miia; Tsagkaris, Kostas; Sarvanko, Heli; Schmidt, Andreas
    Date: 2011-06
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  • D2.1 Description of operational user requirements and scenarios

     Hirst, Paul; Sallent Roig, Jose Oriol; Ferrús Ferré, Ramon; Baldini, Gianmarco; Pisz, Rafal
    Date: 2011-06-02
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  • Distributed channel assignment algorithm based on simulated annealing for uncoordinated OSA-enabled WLANs

     Novillo, Francisco; Ferrús Ferré, Ramon
    International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications
    p. 81-85
    Presentation's date: 2011-06-01
    Presentation of work at congresses

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    A promising approach to alleviate ISM band congestion problems in highly dense WLAN scenarios consists of exploiting opportunistic spectrum access (OSA) to underutilized bands under a primary-secondary model. This paper develops a distributed channel assignment algorithm valid for uncoordinated WLAN deployments where access points do not follow any specific planning and they could belong to different administrative domains. Unlike existing channel assignment schemes proposed for legacy WLANs, channel assignment mechanisms for OSA-enabled WLAN should address two distinguishing issues: channel prioritization and spectrum heterogeneity. Over such a basis, this paper develops and assesses the performance of a distributed channel assignment algorithm that is able to exploit both channel prioritization and spectrum heterogeneity concepts. In particular, the algorithm is based on a distributed adaptation of the simulated annealing metaheuristic algorithm commonly used in global optimization problems.

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    Formulation, implementation considerations, and first performance evaluation of algorithmic solutions - D4.1  Open access

     Sallent Roig, Jose Oriol; Pérez Romero, Jordi; Bouali, Faouzi; Ferrús Ferré, Ramon; Agusti Comes, Ramon; Logothetis, Marios; Georgakopoulos, Andreas; Stavroulaki, Vera; Demestichas, Panagiotis; Kritikou, Yiouli; Thomatos, Evangelos; Bantouna, Aimilia; Akezidou, Maria; Koutsouris, Nikos; Fracchia, Roberta; Pega, Stéphane; Tosic, Milenko; Mustonen, Miia; Matinmikko, Marja; Lécroart, Benoit; Mouton, Christian; Rakotoharison, Lanto; Shariat, Shahin; Fuchs, Rolf; Gebert, Jens; Tsagkaris, Kostas; Tzifa, Lia; Sarli, Asimina; Bourdellès, Michel; Papadopoulou, Louisa-Magdalene; Sarvanko, Heli; Lee, Haeyoung
    Date: 2011-05
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    This deliverable contains a first version of the algorithmic solutions for enabling opportunistic networks. The presented algorithms cover the full range of identified management tasks: suitability, creation, QoS control, reconfiguration and forced terminations. Preliminary evaluations complement the proposed algorithms. Implementation considerations towards the practicality of the considered algorithms are also included.

    Deliverable D4.1 del projecte Europeu OneFIT (ICT-2009-257385)

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    Formulations and identification of algorithmic solutions for enabling opportunistic networks - M4.1  Open access

     Sallent Roig, Jose Oriol; Pérez Romero, Jordi; Bouali, Faouzi; Ferrús Ferré, Ramon; Agusti Comes, Ramon; Logothetis, Marios; Georgakopoulos, Andreas; Stavroulaki, Vera; Demestichas, Panagiotis; Bourdellès, Michel; Pega, Stéphane; Gebert, Jens; Tsagkaris, Kostas
    Date: 2011-04-30
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    This document contains a detailed description of the algorithms to be implemented to manage the opportunistic networks. There are defined according to the functional and system architecture (WP2) to fulfil the technical challenges. These algorithms will implemented during the WP4.2 and validated during the WP4.3

    Milestone M4.1 del projecte Europeu OneFIT (ICT-2009-257385).

  • D4.1 Dissemination plan

     Baldini, Gianmarco; Delmas, Serge; Hirst, Paul; Ferrús Ferré, Ramon; Pisz, Rafal; Sallent Roig, Jose Oriol
    Date: 2011-04-08
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    D1.1 Project presentation  Open access

     Baldini, Gianmarco; Delmas, Serge; Ferrús Ferré, Ramon; Hirst, Paul; Sallent Roig, Jose Oriol; Pisz, Rafal
    Date: 2011-03-02
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    Deliverable D1.1 of Project PROJECT HELP (ENHANCED COMMUNICATIONS IN EMERGENCIES BY CREATING AND EXPLOITING SYNERGIES IN COMPOSITE RADIO SYSTEMS), FP7-SEC-2010-1, PROJECT NUMBER 261659

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    Proposal of C4MS and inherent technical challenges ¿ D3.1  Open access

     Gebert, Jens; Filo, Marcin; Sroka, Krystian; Muck, Markus; Schmidt, Andreas; Lécroart, Benoit; Mouton, Christian; Rakotoharison, Lanto; Vahid, Seiamak; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Demestichas, Panagiotis; Georgakopoulos, Andreas; Koutsouris, Nikos; Stavroulaki, Vera; Matinmikko, Marja; Mustonen, Miia; Tsagkaris, Kostas; Sarvanko, Heli; Moreno, Oscar
    Date: 2011-03-31
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    The scope of OneFIT is on Opportunistic etworks and Cognitive Management Systems for Efficient Application Provision in the uture Internet. This document contains a proposal of Control Channels for Coordination of Cognitive Management Systems (C4MS) which enables delivery of guidance/assistance information from infrastructure towards the Opportunistic Networks and provides means for the management of Opportunistic Networks. This document defines first messages and elementary procedures for the C4MS as well as it identifies a preliminary set of information which is to be conveyed over C4MS. The document introduces also the inherent technical challenges related to the C4MS proposal.

    Deliverable D3.1 del projecte Europeu OneFIT (ICT-2009-257385)

  • D1.2 Project management guidelines

     Baldini, Gianmarco; Delmas, Serge; Hirst, Paul; Ferrús Ferré, Ramon; Pisz, Rafal; Sallent Roig, Jose Oriol
    Date: 2011-03-03
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  • Enhanced Communications in Emergencies by Creating and Exploiting Synergies in Composite Radio Systems

     Ferrús Ferré, Ramon; Agusti Comes, Ramon; Bouali, Faouzi; Sallent Roig, Jose Oriol
    Competitive project

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    OneFIT functional and system architecture - D2.2  Open access

     Gebert, Jens; Lange, Christian; Wich, Andreas; Georgakopoulos, Andreas; Demestichas, Panagiotis; Stavroulaki, Vera; Akezidou, Maria; Logothetis, Marios; Thomatos, Evangelos; Koutsouris, Nikos; Kritikou, Yiouli; Bantouna, Aimilia; Visiedo, David; Martin, Oscar; Mueck, Markus; Mouton, Christian; Mustonen, Miia; Matinmikko, Marja; Filo, Marcin; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Boskovic, Dragan; Tosic, Milenko; Bender, Paul; Tsagkaris, Kostas; Tzifa, Lia; Moreno, Oscar; Schmidt, Andreas
    Date: 2011-02-28
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    This document presents the OneFIT functional and system architecture for the management and control of infrastructure coordinated opportunistic networks (ONs). The most relevant building blocks "Cognitive management System for the Coordination of the Infrastructure" (CSCI) and the "Cognitive Management system for the Opportunistic Network" (CMON) are described.

    Deliverable D2.2 del projecte Europeu OneFIT (ICT-2009-257385)

  • Contribution to resource management in cellular acces networks with limited backhaul capacity

     Galeana Zapien, Hiram
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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  • Contribution to resource management in cellular access networks with limited backhaul capacity  Open access

     Galeana Zapien, Hiram
    Department of Signal Theory and Communications, Universitat Politècnica de Catalunya
    Theses

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    La interfaz radio de los sistemas de comunicaciones móviles es normalmente considerada como la única limitación de capacidad en la red de acceso radio. Sin embargo, a medida que se van desplegando nuevas y más eficientes interfaces radio, y de que el tráfico de datos y multimedia va en aumento, existe la creciente preocupación de que la infraestructura de transporte (backhaul) de la red celular pueda convertirse en el cuello de botella en algunos escenarios. En este contexto, la tesis se centra en el desarrollo de técnicas de gestión de recursos que consideran de manera conjunta la gestión de recursos en la interfaz radio y el backhaul. Esto conduce a un nuevo paradigma donde los recursos del backhaul se consideran no sólo en la etapa de dimensionamiento, sino que además son incluidos en la problemática de gestión de recursos. Sobre esta base, el primer objetivo de la tesis consiste en evaluar los requerimientos de capacidad en las redes de acceso radio que usan IP como tecnología de transporte, de acuerdo a las recientes tendencias de la arquitectura de red. En particular, se analiza el impacto que tiene una solución de transporte basada en IP sobre la capacidad de transporte necesaria para satisfacer los requisitos de calidad de servicio en la red de acceso. La evaluación se realiza en el contexto de la red de acceso radio de UMTS, donde se proporciona una caracterización detallada de la interfaz Iub. El análisis de requerimientos de capacidad se lleva a cabo para dos diferentes escenarios: canales dedicados y canales de alta velocidad. Posteriormente, con el objetivo de aprovechar totalmente los recursos disponibles en el acceso radio y el backhaul, esta tesis propone un marco de gestión conjunta de recursos donde la idea principal consiste en incorporar las métricas de la red de transporte dentro del problema de gestión de recursos. A fin de evaluar los beneficios del marco de gestión de recursos propuesto, esta tesis se centra en la evaluación del problema de asignación de base, como estrategia para distribuir el tráfico entre las estaciones base en función de los niveles de carga tanto en la interfaz radio como en el backhaul. Este problema se analiza inicialmente considerando una red de acceso radio genérica, mediante la definición de un modelo analítico basado en cadenas de Markov. Dicho modelo permite calcular la ganancia de capacidad que puede alcanzar la estrategia de asignación de base propuesta. Posteriormente, el análisis de la estrategia propuesta se extiende considerando tecnologías específicas de acceso radio. En particular, en el contexto de redes WCDMA se desarrolla un algoritmo de asignación de base basado en simulatedannealing cuyo objetivo es maximizar una función de utilidad que refleja el grado de satisfacción de las asignaciones respecto los recursos radio y transporte. Finalmente, esta tesis aborda el diseño y evaluación de un algoritmo de asignación de base para los futuros sistemas de banda ancha basados en OFDMA. En este caso, el problema de asignación de base se modela como un problema de optimización mediante el uso de un marco de funciones de utilidad y funciones de coste de recursos. El problema planteado, que considera que existen restricciones de recursos tanto en la interfaz radio como en el backhaul, es mapeado a un problema de optimización conocido como Multiple-Choice Multidimensional Knapsack Problem (MMKP). Posteriormente, se desarrolla un algoritmo de asignación de base heurístico, el cual es evaluado y comparado con esquemas de asignación basados exclusivamente en criterios radio. El algoritmo concebido se basa en el uso de los multiplicadores de Lagrange y está diseñado para aprovechar de manera simultánea el balanceo de carga en la intefaz radio y el backhaul.

  • Acceso radio cognitivo y oportunista

     Raschella, Alessandro; Bouali, Faouzi; Bolea, Liliana; Sanchez Gonzalez, Juan; Umbert Juliana, Anna; Ferrús Ferré, Ramon; Casadevall Palacio, Fernando-jose; Agusti Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol
    Competitive project

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    Business scenarios, technical challenges and system requirements - D2.1  Open access

     Visiedo, David; Urdiales, Diego; Santiago, Miquel Angel; Gebert, Jens; Lange, Christian; Wich, Andreas; Agusti Comes, Ramon; Ferrús Ferré, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol; Mustonen, Miia; Matinmikko, Marja; Demestichas, Panagiotis; Stavroulaki, Vera; Akezidou, Maria; Logothetis, Marios; Georgakopoulos, Andreas; Thomatos, Evangelos; Koutsouris, Nikos; Kritikou, Yiouli; Bantouna, Aimilia; Filo, Marcin; Piesiewicz, Radoslaw; Boskovic, Dragan; Tosic, Milenko; Pecelj, Ilija; Schmmidt, Andreas; Muck, Markus; Mouton, Christian; Merat, Vincent; Bender, Paul; Tsagkaris, Kostas; Tzifa, Lia; Moreno, Oscar
    Date: 2010-11
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    Deliverable D2.1 del projecte Europeu OneFIT (ICT-2009-257385)

  • Opportunistic networks and Cognitive Management Systems for Efficient Application Provision in the Future

     Pérez Romero, Jordi; Ferrús Ferré, Ramon; Gelonch Bosch, Antoni; Casadevall Palacio, Fernando-jose; Agusti Comes, Ramon; Sanchez Gonzalez, Juan; Umbert Juliana, Anna; Raschella, Alessandro; Bouali, Faouzi; Sallent Roig, Jose Oriol
    Competitive project

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  • Opportunistic channel allocation algorithms for WLANs based on IEEE802.11

     Novillo, Fernando; Ferrús Ferré, Ramon; Agusti Comes, Ramon; Nasreddine, Jad Nayef
    Future Network and MobileSummit
    Presentation's date: 2010-06-18
    Presentation of work at congresses

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    The deployment of highly dense wireless local area networks (WLAN) can cause an excessive level of interference in the commonly used 2.4 GHz ISM band, which leads to network performance degradation. This paper analyses the possibility to reduce congestion in the crowded ISM band by allowing some access points (APs) to opportunistically operate in a primary band. Although the problem of opportunistic channel allocation considering both ISM and primary bands can be formulated mathematically as a Binary Linear Programming (BLP) problem, existing algorithms (e.g., branch and bound) capable to provide optimal solutions for BLP problems are quite inefficient for large deployments. Therefore, we propose three different heuristic algorithms to solve this opportunistic channel allocation problem by properly extending graph coloring algorithms: First Fit (FF), Saturation Degree Ordering (SDO) and Minimum Spanning Tree (MST). A performance analysis of the three algorithms is carried out under different conditions of primary band availability and AP density

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    Enhanced base station assignment approach for coping with backhaul constraints in OFDMA-based cellular networks  Open access

     Galeana Zapién, Hiram; Ferrús Ferré, Ramon
    European Wireless
    p. 254-260
    DOI: doi: 10.1109/EW.2010.5483425
    Presentation's date: 2010-04
    Presentation of work at congresses

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    In this paper we extend the base station (BS) assignment problem to incorporate backhaul related constraints into the assignment decision. This is motivated by the fact that the deployment of more spectral efficient radio access technologies are currently imposing stringent bandwidth requirements at cell sites, and there is a growing concern that backhaul network can become a new network bottleneck in certain deployment scenarios. Unlike existing assignment approaches, we propose a BS assignment algorithm envisioned as a suitable technique capable to cope, at some extent, with possible backhaul congestion situations in OFDMA-based systems. Simulation results demonstrate that the proposed algorithm can provide the same system capacity with less backhaul resources so that, under backhaul bottleneck situations, a better overall network performance is effectively achieved.

  • FLEXIBLE AND SPECTRUM-AWARE RADIO ACCESS THROUGH MEASUREMENTS AND MODELLING IN

     Pérez Romero, Jordi; Raschella, Alessandro; López Benítez, Miguel; Garcia Escriche, Sergio; Umbert Juliana, Anna; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Bouali, Faouzi; Bolea, Liliana; Casadevall Palacio, Fernando-jose; Agusti Comes, Ramon
    Competitive project

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  • LTE: nuevas tendencias en comunicaciones móviles

     Agusti Comes, Ramon; Bernardo Alvarez, Francisco; Casadevall Palacio, Fernando-jose; Ferrús Ferré, Ramon; Pérez Romero, Jordi; Sallent Roig, Jose Oriol
    Date of publication: 2010
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  • GRUP DE RECERCA EN COMUNICACIONS MÒBILS

     Bolea, Liliana; Sanchez Gonzalez, Juan; Casadevall Palacio, Fernando-jose; Marojevic, Vuk; Umbert Juliana, Anna; Pérez Romero, Jordi; Gelonch Bosch, Antoni; Ferrús Ferré, Ramon; Sallent Roig, Jose Oriol; Bouali, Faouzi; Agusti Comes, Ramon
    Competitive project

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    A channel allocation algorithm for OSA-Enabled IEEE 802.11 WLANs  Open access

     Novillo Parales, Francisco Vicente; Churchman, M.; Ferrús Ferré, Ramon; Agusti Comes, Ramon
    IEEE International Symposium on Wireless Communication Systems
    p. 468-472
    Presentation's date: 2009-09-01
    Presentation of work at congresses

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    Channel allocation problem is a major challenge in wireless local area networks (WLANs), especially in dense deployments of access points (APs) where congestion of the unlicensed spectrum bands (i.e., ISM bands) could undermine achieved network performance. This paper analyses the possibility to alleviate congestion of the ISM band by allowing some APs to use additional channels located in licensed bands in an opportunistic manner whenever licensee services (i.e., primary users) are not affected. Availability of these additional channels in licensed bands is assumed not to be the same for all the APs. Based on this assumption, we formulate the problem for the channel assignment as a Binary Linear Programming (BLP) problem, which allows us to obtain an optimal solution despite an elevated execution time. We also develop a heuristic method based on building a Minimum Spanning Tree (MST) graph attending to interference conditions that is able to find nearoptimal solutions with a shorter execution time. Results are provided to assess the benefits of such a proposal under different WLAN deployment situations and primary channel availability conditions.

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    On concurrent multipath transfer in SCTP-based handover scenarios  Open access

     Budzisz, Lukasz; Ferrús Ferré, Ramon; Casadevall Palacio, Fernando-jose; Amer, Paul
    IEEE International Conference on Communications
    p. 1-6
    DOI: 10.1109/ICC.2009.5199237
    Presentation's date: 2009-06
    Presentation of work at congresses

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    Abstract—Handling mobility at the transport layer is a promising approach to achieve seamless handover in the context of heterogeneous wireless access networks. In particular, features such as multihoming and dynamic address reconfiguration provided by mobile SCTP (mSCTP) protocol are among the key enablers for handover support at the transport layer. This paper investigates the applicability of Concurrent Multipath Transfer (CMT) to distribute data among two end-to-end paths of an mSCTP association during the handover transition process. To that end, the principles of the mSCTP-CMT design are given, emphasizing the consequences of a sender-introduced reordering and its effect on congestion control. The proposed mSCTPCMT handover scheme is benchmarked with two other handover schemes, namely mSCTP and SCTP failover-based. Provided analysis indicates the possible application area of mSCTP-CMT, taking into account not only handover scenario parameters (dwelling time, available bandwidth ratio and round-trip time), but also an important design constraint: receiver buffer (rbuf) size. Rbuf size proves to be a major limiting factor shrinking significantly, yet not excluding mSCTP-CMT’s application scope

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    User allocation algorithm with rate guarantees for multi-rate mobile networks with Backhaul Constraints  Open access

     Galeana Zapién, Hiram; Lainz, Anna; Ferrús Ferré, Ramon
    IEEE Vehicular Technology Conference
    p. 1-5
    DOI: 10.1109/VETECS.2009.5073896
    Presentation's date: 2009-04
    Presentation of work at congresses

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    The optimization of the base station (BS) assignment problem in mobile access networks is a primary task towards enabling efficient utilization of network resources. So far, this problem has been mainly studied in terms of air interface optimization. In this paper, we present a novel BS assignment strategy that integrates backhaul constraints in the user assignment criterion. The motivation of this strategy is the fact that in some scenarios the backhaul can become the network bottleneck. The BS assignment problem or user allocation problem is formulated using a utility-based framework. We take into consideration key aspects such as the revenue associated to each type of service along with the resource consumption in terms of both radio and backhaul resources. Results are given in a multi-service scenario for guaranteed rate services.

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    Design principles and performance evaluation of mSCTP-CMT for transport-layer based handover  Open access

     Budzisz, Lukasz; Ferrús Ferré, Ramon; Casadevall Palacio, Fernando-jose
    IEEE Vehicular Technology Conference
    p. 1-5
    DOI: 10.1109/VETECS.2009.5073493
    Presentation's date: 2009-04
    Presentation of work at congresses

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    Handling mobility at the transport layer is a promising approach to achieve seamless handover in the context of heterogeneous wireless access networks. In particular, features such as multihoming and dynamic address reconfiguration provided by mobile SCTP (mSCTP) protocol are among the key enablers for handover support at the transport layer. This paper investigates the applicability of Concurrent Multipath Transfer (CMT) to distribute data among two end-to-end paths of a mSCTP association during handover transition process. To that end, the principles of the mSCTP-CMT design are given, emphasizing the consequences of such a sender-introduced reordering and its congestion control implications in a handover scenario. The proposed mSCTP-CMT handover scheme is benchmarked with a pure mSCTP handover scheme. Provided analysis indicates the possible application area of mSCTP-CMT, taking into account not only handover scenario parameters (dwelling time, available bandwidth ratio and round-trip time), but also the most important constraint of such a design: receiver buffer (rbuf) size. Rbuf size proves to be the major limiting factor shrinking significantly possible mSCTP-CMT application scope, yet not excluding definitively the proposed idea.

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    Spectrum availability in indoor locations for opportunistic spectrum access in dense urban scenarios  Open access

     Novillo, Francisco; Galeana Zapién, Hiram; Ferrús Ferré, Ramon; Agusti Comes, Ramon
    IEEE Vehicular Technology Conference
    p. 1-5
    DOI: 10.1109/VETECS.2009.5073861
    Presentation's date: 2009-04
    Presentation of work at congresses

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    This paper analyses the possibility to exploit opportunistic spectrum access (OSA) for short-range radio communication systems within indoor locations in dense urban areas. In particular, considering the service area of a primary system devoted to providing outdoor coverage in a dense urban scenario, the percentage of indoor locations where the secondary users can reuse the primary frequency band without disturbing the primary system or being disturbed is estimated. The analysis considers heterogeneous path loss models for the primary and secondary systems encompassing the characterization of outdoor, indoor and building penetration losses. Obtained results quantify how aspects like the location of the primary network elements and the considered interference margins to protect primary transmissions impact on the spatial availability of the primary band within the interior of the buildings.

  • A cost-based approach for base station assignment in mobile networks with limited backhaul capacity

     Galeana Zapién, Hiram; Ferrús Ferré, Ramon; Novillo, F
    IEEE Global Comunications Conference 2008
    p. 1-5
    DOI: 10.1109/GLOCOM.2008.ECP.965
    Presentation's date: 2008-12
    Presentation of work at congresses

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  • A cost-based approach for base station assignment in mobile networks with limited balckhaul capacity

     Ferrús Ferré, Ramon
    IEEE Global Comunications Conference 2008
    Presentation's date: 2008-11-30
    Presentation of work at congresses

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