http://hdl.handle.net/2117/1657 2013-05-18T14:55:51Z http://hdl.handle.net/2117/16702 Title: Performance assessment & synergic operation of algorithmic solutions enabling opportunistic networks– D4.2 Authors: Demestichas, Panagiotis; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Karvounas, Dimitrios; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Riaz, Maryam; Bourdellès, Michel; Vahid, Seiamak; Gebert, Jens; Fuchs, Rolf; Moreno, Oscar; Matinmikko, Marja; Sarvanko, Heli; Boskovic, Dragan; Tosic, M.; Alnwaimi, Ghassan; Rakotoharison, Lanto; Panaitopol, Dorin; Bagayoko, Abdoulaye; Mouton, Christian; Lee, Haeyoung; Shariat, Shahin Abstract: Deliverable D4.2 del projecte europeu OneFIT http://hdl.handle.net/2117/19181 Title: A solution framework to provide management services for wireless communications in the digital home Authors: Ferrús Ferré, Ramón Antonio; Sallent Roig, José Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon Abstract: The future digital home (DH) is envisioned as a place where a plethora of diverse personal and machine-to-machine communications will coexist to support different applications in areas such as information and entertainment, home automation, home health care and home security and management. Wireless technologies are usually the preferred solution to cope with DH communications for their ease of installation and use. However, expected capacity demand and the lack of coordination between an increasing number of diverse wireless devices in use within the DH is seriously challenging the performance and usability of wireless technologies. This article outlines a novel technical solution intended to enhance capacity and quality of DH wireless communications. The proposed solution establishes a radio-independent coexistence framework where key operational radio settings of DH devices are coordinately determined, and new spectrum sources other than traditional ISM bands can be exploited for DH communications. The addressed solution enables a business player to offer management services for DH wireless communications so that ordinary users can be relieved of complex management tasks likely to arise within the DH. The article discusses how potential management service providers could benefit from the proposed solution. Besides, the functional architecture of the proposed solution together with the set of procedures necessary for the management of the DH wireless communications are outlined. A realistic indoor scenario is presented as an illustrative use case to show how proper decision making logic in managing the DH could improve the efficiency by selecting the most suitable spectrum for in-house wireless communications. Finally, the main implementation issues are identified and discussed in order to outline a feasible roadmap. 2013-05-13T14:15:57Z http://hdl.handle.net/2117/18413 Title: On demonstrating spectrum selection functionality for opportunistic networks Authors: Raschellà, Alessandro; Umbert Juliana, Anna; Pérez Romero, Jordi; Sallent Roig, José Oriol Abstract: This paper presents a testbed platform to demonstrate and validate spectrum opportunity identification and spectrum selection functionalities in Opportunistic Networks (ONs). The hardware component of the testbed is based on reconfigurable devices able to transmit and receive data at different operating frequencies, which are dynamically configured. The software component has been developed to perform the creation and maintenance of ON radio links, including spectrum opportunity identification and selection decision making as well as all the necessary signaling to support the ON operation. Therefore, the presented platform provides a powerful tool for testing different algorithms in real operational radio environments under various interference conditions, thus enabling to gain deeper insight into the performance of algorithmic solutions, beyond the purely theoretical analyses based on models and/or simulations. Results presented in the paper validate the implementation conducted at the laboratory and illustrate the reconfigurability capabilities of the ON links under different conditions. 2013-03-19T15:38:51Z http://hdl.handle.net/2117/18266 Title: Protocols, performance assessment and consolidation on interfaces for standardization – D3.3 Authors: Filo, Marcin; Wierzbowsi, Tomasz; Gebert, Jens; Wich, Andreas; Jactat, Caroline; Lécroart, Benoit; Mouton, Christian; Haeyoung, Lee; Vahid, Seiamak; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Pérez Romero, Jordi; Sallent Roig, José Oriol; Demestichas, Panagiotis; Georgakopoulos, Andreas; Karvounas, Dimitrios; Koutsouris, Nikos; Stavroulaki, Vera; Tsagkaris, Kostas; Matinmikko, Marja; Sarvanko, Heli Abstract: 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. 2013-03-13T15:19:39Z http://hdl.handle.net/2117/18195 Title: Rate adaptive resource allocation with fairness control for OFDMA networks Authors: Bezerra Rodrigues, Emanuel; Casadevall Palacio, Fernando José Abstract: The use of opportunistic radio resource allocation techniques in order to efficiently manage the resources generates a low fairness among the users in a cellular system due to uneven Quality of Service (QoS) distribution. Some classic rate adaptive policies tried to tackle this problem for OFDMA systems by proposing solutions to maximize capacity, maximize fairness, or find a static trade-off between these two objectives. This work generalizes these classic policies and propose a dynamic fairness/rate adaptive technique based on dynamic sub-carrier assignment and equal power allocation that considers a new fairness constraint in the optimization problem. By means of extensive system-level simulations, it is demonstrated that the proposed technique is able to provide an instantaneous (short-term) fairness control, which provides to the network operator the flexibility to operate on any desired trade-off point. 2013-03-11T19:17:39Z http://hdl.handle.net/2117/18079 Title: Envelope tracking amplification with reduced slew-rate and bandwidth envelopes Authors: Vizarreta Paz, Pedro Pablo; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Bertran Albertí, Eduardo; Berenguer Sau, Jordi; Gelonch Bosch, Antonio José; García, José Angel Abstract: This paper presents an Envelope Tracking Pow- er Amplifier whose architecture includes a Hybrid Envelope Amplifier (HEA) and an algorithm to adapt the envelope’s characteristics to the HEA’s limitations. The HEA attempts to combine the high efficiency of a switched amplifier with the wide band capabilities of a linear amplifier. A modified Slew Rate (SR) reduction algorithm cope with the bandwidth and SR limitations of the HEA. On the other hand, the non-linearities introduced by this Envelope Amplifier (EA) and by the dynamic supply are compensated using Digital Pre-Distortion. Results show that these non-linearities are compensable and that the architecture offers higher efficiency figures compared to the conventional linear EA 2013-03-05T18:26:37Z http://hdl.handle.net/2117/17944 Title: Final report on dissemination, regulation, standardization, exploitation & training : D6.3 Authors: Vahid, Seiamak; Matinmikko, Marja; Mustonen, Miia; Demestichas, Panagiotis; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Kritikou, Yiouli; Tzifa, Lia; Koutsouris, Nikos; Karvounas, Dimitrios; Logothetis, Marios; Sarli, Asimina; Bantouna, Aimilia; Papadopoulou, Louisa-Magdalene; Galani, Aristi; Vlacheas, Panagiotis; Morakos, Petros; Antzoulatos, Alexandros; Bender, Paul; Gebert, Jens; Tosic, Milenko; Filo, Marcin; Mouton, Christian; Mueck, Markus; Schmidt, Andreas; Sarvanko, Heli; Bourdellès, Michel; Pega, Stéphane; Moreno, Oscar; Pérez Romero, Jordi; Sallent Roig, José Oriol Abstract: Deliverable D6.3 del projecte OneFIT Description: In D6.1 deliverable project dissemination, exploitation and training plans, as well as standardization & regulatory approach strategy was presented. The D6.2 reported on the necessary updates of these strategies and the actions taken by the partners in line with them, as well as the obtained results. In this D6.3 deliverable, a full set of project dissemination activities, standardization & regulatory contributions as well as an operator’s “cook book” outlining steps necessary for full deployment of ON functionality and services, are presented. 2013-02-22T13:52:16Z http://hdl.handle.net/2117/17920 Title: Results analysis and validation - D5.3 Authors: Moreno, Oscar; González, José Luis; Pérez Romero, Jordi; Sallent Roig, José Oriol; Raschellà, Alessandro; Umbert Juliana, Anna; Gebert, Jens; Fuchs, Rolf; Demestichas, Panagiotis; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Kritikou, Yiouli; Tzifa, Lia; Koutsouris, Nikos; Karvounas, Dimitrios; Logothetis, Marios; Sarli, Asimina; Bantouna, Aimilia; Papadopoulou, Louisa-Magdalene; Galani, Aristi; Vlacheas, Panagiotis; Morakos, Petros; Antzoulatos, Alexandros; Mueck, Markus; Drewes, Christian; Nehring, Florian; Moser, Guenter; Tosic, Milenko; Boskovic, Dragan; Ikovic, Ognjen; Cirilovic, Mirko; Vahid, Seiamak; Ghoraishi, Mir; Pega, Stéphane; Bourdellès, Michel; Bagayoko, Abdoulaye; Mouton, Christian; Panaitopol, Dorin; Delsol, Thomas Abstract: Deliverable D5.3 del projecte OneFIT 2013-02-22T09:14:33Z http://hdl.handle.net/2117/17910 Title: Performance evaluation of synergic operation of algorithms enabling opportunistic networks - D4.3 Authors: Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon; Gebert, Jens; Fuchs, Rolf; Demestichas, Panagiotis; Georgakopoulos, Andreas; Stavroulaki, Vera; Tsagkaris, Kostas; Kritikou, Yiouli; Tzifa, Lia; Koutsouris, Nikos; Karvounas, Dimitrios; Logothetis, Marios; Sarli, Asimina; Bantouna, Aimilia; Papadopoulou, Louisa-Magdalene; Galani, Aristi; Vlacheas, Panagiotis; Morakos, Petros; Antzoulatos, Alexandros; Moreno, Oscar; Tosic, M.; Boskovic, Dragan; Cirilovic, Mirko; Sarvanko, Heli; Chen, Xianfu; Pega, Stéphane; Bourdellès, Michel; Vahid, Seiamak; Bagayoko, Abdoulaye; Mouton, Christian; Delsol, Thomas; Panaitopol, Dorin; Riaz, Maryam; Ainwaimi, Ghassan; Lee, Haeyoung Abstract: Deliverable D4.3 del projecte OneFIT 2013-02-21T12:16:18Z http://hdl.handle.net/2117/17177 Title: Processing-to-amplifier power ratio for energy efficient communications Authors: Gómez Miguelez, Ismael; Marojevic, Vuk; Gelonch Bosch, Antonio José Abstract: The energy consumption of modern communications systems is dominated by the signal processing and shaping circuitry. Assuming a rate-independent processing power consumption, the energy per bit spent for signal processing can be effectively reduced by increasing the transmission power. The optimal relation between processing and transmission power for energy efficient communications is derived. This relation is called processing-to-amplifier power ratio (PrAPR). 2012-12-20T14:13:30Z http://hdl.handle.net/2117/17167 Title: Cognitive resource management: for all wireless access layers Authors: Marojevic, Vuk; Gómez Miguelez, Ismael; Gelonch Bosch, Antonio José 2012-12-19T19:31:54Z http://hdl.handle.net/2117/16741 Title: Exploiting knowledge management for supporting spectrum selection in cognitive radio networks Authors: Pérez Romero, Jordi; Bouali, Faouzi; Sallent Roig, José Oriol; Agustí Comes, Ramon Abstract: Abstract—In order to increase Cognitive Radio operation efficiency, this paper builds up a new knowledge management functional architecture for supporting spectrum management. It integrates the fittingness factor concept proposed by the authors in a prior work and includes a set of advanced statistics capturing the influence of the radio environment. Then, a Knowledge Manager (KM) exploiting these statistics and observed fittingness factor values has been developed to monitor the time-varying suitability of spectrum resources to support heterogeneous services. Based on estimated suitability levels, a new strategy combining Spectrum Selection (SS) and Spectrum Mobility (SM) functionalities has been proposed. Results have shown that the proposed strategy efficiently exploits the KM support at low loads and the SM functionality at high loads to introduce significant gains (ranging from 85% to 100%) w.r.t. a pure random selection while exhibiting substantial robustness to changes in interference levels. 2012-10-17T11:35:31Z http://hdl.handle.net/2117/16740 Title: A Spectrum selection framework for opportunistic networks Authors: Moessner, Klaus; Pérez Romero, Jordi; Sallent Roig, José Oriol; Bouali, Faouzi; Sarvanko, Heli; Mustonen, Miia; Matinmikko, Marja; Lee, Haeyoung; Vahid, Seiamak Abstract: This paper presents a framework for including cognitive management functionalities in the spectrum selection process for Opportunistic Networks (ONs).The framework is based on a decision making functionality interacting with a knowledge management block that stores and processes information about the spectrum use. Different approaches for spectrum selection are discussed covering specific cases including the capability to aggregate different bands and the possibility to jointly select the spectrum and the network interface. Illustrative results of the proposed framework are presented. 2012-10-17T11:18:51Z http://hdl.handle.net/2117/16738 Title: Channel assignment algorithms for OSA-Enabled WLANs exploiting prioritization and spectrum heterogeneity Authors: Novillo Parales, Francisco Vicente; Ferrús Ferré, Ramón Antonio Abstract: Allowing WLANs to exploit opportunistic spectrum access (OSA) is a promising approach to alleviate spectrum congestion problems in overcrowded unlicensed ISM bands, especially in highly dense WLAN deployments. In this context, novel channel assignment mechanisms jointly considering available channels in both unlicensed ISM and OSA-enabled licensed bands are needed. Unlike classical schemes proposed for legacy WLANs, channel assignment mechanisms for OSA-enabled WLAN should face two distinguishing issues: channel prioritization and spectrum heterogeneity. The first refers to the fact that additional prioritization criteria other than interference conditions should be considered when choosing between ISM or licensed band channels. The second refers to the fact that channel availability might not be the same for all WLAN Access Points because of primary users' activity in the OSA-enabled bands. This paper firstly formulates the channel assignment problem for OSA-enabled WLANs as a Binary Linear Programming (BLP) problem. The resulting BLP problem is optimally solved by means of branch and bound algorithms and used as a benchmark to develop more computationally efficient heuristics. Upon such a basis, a novel channel assignment algorithm based on weighted graph coloring heuristics and able to exploit both channel prioritization and spectrum heterogeneity is proposed. The algorithm is evaluated under different conditions of AP density and primary band availability. 2012-10-17T10:45:18Z http://hdl.handle.net/2117/16692 Title: D6.2 - Prototype description and field trial results Authors: Fouillot, Pascale; Casadevall Palacio, Fernando José; Pérez Romero, Jordi; Gavrilovska, Liljana; Atanasovski, Vladimir; Denkovski, Daniel; Rakovic, Valentin; Pavloski, Mihajlo; Iacobelli, Lorenzo; Faies, Mohammed; Ramos, Filipe; Hau Chin, Woon; Farnham, Tim; Dejonghe, Antoine; Cai, Tao; Lidström, Erik; van de Beek, Jaap; Polydoros, Andreas; Dagres, Ioannis; Sayrac, Berna; Riihijärvi, Janne; Wang, Peng; Mähönen, Petri; Nasreddine, Jad Nayef; Ansari, Junaid; Meshkova, Elena Abstract: Deliverable D6.2 del projecte FARAMIR 2012-10-09T12:43:57Z