Vietnam-Japan ICT WorkshopThe University of Aizu, Aizuwakamatsu city, Fukushima, Japan Dec. 10, 2012 |
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Venue & Time3D Theater, University-Business Innovation Center (UBIC), University of Aizu (UoA) campus Time: 9:00AM to 12:40PM, Dec. 10, 2012. Workshop ProgramOpening (9:00~9:10AM) By Prof. Anh T. Pham, UoA/CCL Introduction to School of Information and Communication Technology (SoICT), HUST (9:10~9:20AM) by Prof. Huynh Quyet Thang, SoICT, Hanoi University of Science and Technology (HUST) Invited talk: Internet of Things and Its Applications ~ Smart Care Town for Support of Senior Citizen (9:30~10:10AM) by Prof. Zixue Cheng & Prof. J. Wang, UoA Genetic Algorithm for Solving Survivable Network Design Problem with Simultaneous Unicast and Anycast Flows (10:10~ 10:20AM) by Dr. Huynh Thi Thanh Binh, SoICT, HUST Abstract: We consider the survivable network design problem for simultaneous unicast and anycast flow requests. Given a network modeled by a connected weighted and undirected graph with link cost follows All Capacities Modular Cost (ACMC) model and a set of flow demand. This problem aims at finding a set of connection with the smallest network cost to protect the network against any single failure. This problem is NP-hard. In this presentation, we propose a new Genetic Algorithm for solving the ACMC Survivable Network Design Problem (A-SNDP). Extensive simulation results on Polska, Germany and Atlanta instances show that the proposed algorithm is much more efficient than the Tabu Search, FBB1 and FBB2 in terms of minimizing the network cost. Recent advances in Standard-Compliant IPTV Services over Heterogeneous Networks (10:20~10:40AM) by Prof. Cong-Thang Truong, UoA/CCL Abstract: IPTV, which is based on the universal IP infrastructure, has the inherent nature of heterogeneity in terms of contents, networks, terminals, and users. An important solution to cope with such heterogeneity is content adaptation. This paper reviews the standardization issues related to content adaptation in IPTV standards. We first describe the basic architecture of content adaptation and its integration into the ITU-T IPTV and MPEG DASH architectures. Especially, we highlight the standard metadata tools to support adaptivity for IPTV. Some related research achievements are also presented to show the actual performance of IPTV in practice. -------------- Coffee break (10 min) -------------- A Novel Access Protocol for Collision-Free and Low-Latency OBS-Ring Metro Networks (10:50~11:10AM) by Dr. Dang The Ngoc, Posts and Telecom. Institute of Technology-Vietnam Abstract: We propose a novel access protocol for OBS-ring metro networks. The proposed access protocol is based on the scheme of locating idle time slot at all wavelengths before sending bursts. This would help to avoid burst collision and efficiently use wavelength resource. To support this access protocol, a low-cost node architecture that provides burst transmission on multiple wavelengths is also proposed. The numerical results show that OBS-ring metro network using proposed access protocol outperforms the ones using wavelength-based and multi-token-based access protocols in terms of mean queuing delay. In addition, it can support larger the number of nodes and higher burst arrival rate compared to that of the conventional OBR-ring metro networks. Radio resource management for beyond 4G mobile communications networks (11:10~11:30AM) by Dr. Nguyen Nam Hoang, Univ. of Engineering and Technology/Vietnam National University and UoA/CCL Abstract: The demand of beyond 4th Generation (4G) mobile communications includes not only high transmission rate but also the capability to provide QoS guaranteed services to high user density areas under the constraint of limited radio spectrum. In this presentation, we will discuss candidate key technologies for next generation mobile communications networks. Among of them, cognitive radio is considered as a core technology, which provides dynamic wireless spectrum sharing between primary mobile network operators and secondary networks. Femtocell is a new mobile technology proposed for providing wireless voice and broadband services to customers in small areas such as the home, office or designated locations. A cognitive femtocell-cellular network model is introduced which is considered as a mobile network model used for beyond 4G mobile communications. Performance results of selected channel allocation schemes obtained by computer simulation are presented and discussed. An enhanced greedy node mapping algorithm for resource allocation in network virtualization (11:30~11:50AM) by Dr. Ngo Hong Son, SoICT, HUST Abstract: In recent years, network virtualization is considered to be a promising way to improve flexibility and manageability for the future Internet by allowing multiple heterogeneous virtual networks to co-exist on a shared infrastructure. A major challenge in network virtualization is how to use the underlying resources effectively and to satisfy the requirement of virtual network requests. Since the general embedding problem is computationally unsolvable, past researches have focused on two main approaches: narrowing the problem space to decrease the complexity or introducing heuristic algorithms. In this work, we introduce an enhanced node mapping algorithm for common classes of virtual network topologies. Extensive simulation shows that our proposed algorithm gives better results in terms of revenue-to-cost ratio as well as acceptance ratio. Spectrum and Energy Efficiency through multi-band cognitive radio systems (11:50~12:10PM) by Prof. Van Tam Nguyen, Telecom Paris, Paristech and UoA/CCL Abstract: Cognitive radio system (CRS) is a radio system which is aware of its operational and geographical environment, established policies and its internal state. It is able to dynamically and autonomously adapt its operational parameters and protocols and to learn from its previous experience. Based on software defined radio (SDR), CRS provides additional flexibility and offers improved efficiency to overall spectrum use. CRS is a disruptive technology targeting very high spectral efficiency. In this talk, we will present some new results from FP7 SACRA project on Spectrum and Energy Efficiency through multi-band cognitive radio systems. IEEE 1394b - S400 polymer optical fiber home networks using commercial 650nm LED (12:10~12:30PM) by Prof. Phi Hoa Binh, Vietnam Academy of Science and Technology and UoA/CCL Abstract: Among various technologies proposed for home networks which require very high bandwidth for real-time services and applications, IEEE 1394 polymer optical fiber (POF) network is considered as a candidate due to its flexibility, real-time features, easy operation, economy and high reliability. Fiber optic transceivers based on high-speed resonant-cavity light-emitting diode (RCLED) for such systems are being widely commercialized at data rate of 250Mbit/s. Recently, we have introduced a method to improve LED’s modulation rate by using a simple Schottky diodes-capacitance current-shaping circuits. Our latest measurements confirmed that a 300% performance improvement can be achieved the new transceiver. In this work, we demonstrate an error-free transmission over 50m GI-POF at 500Mbit/s for IEEE 1394b - S400 network using a commercial 650nm RCLED which has only 70MHz bandwidth at -3dB. Closing + photo session: 12:30~12:40PM 12:45PM: Lunch at the University restaurant |
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