%0 Conference Paper %B Broadband Europe 2005, Bordeaux, France %D 2005 %T The Broadband Status in the Region of Western Greece: Overview and Recommendations %A Christos Bouras %A Vaggelis Kapoulas %A Thrasivoulos Tsiatsos %A Antonios Alexiou %A Vaggelis Igglesis %A Mixalis Paraskevas %A J Papagiannopoulos %X This paper presents a study conducted in the Region of Western Greece, in order to propose an overall planning for the development of broadband infrastructure in the Region of Western Greece. The current broadband status in the region is being described, while the results of a survey on broadband usage and demand are being presented. The paper proposes some Recommendations that should be adopted in the region of Western Greece in order for the appropriate broadband infrastructures to be developed and adopted so as to contribute to economic growth and to tackle any possible cases of “digital gap” between the citizens of our country. %B Broadband Europe 2005, Bordeaux, France %8 12 - 14 December %G eng %0 Conference Paper %B 2nd IEEE/Create - net International Workshop on Deployment Models and First/Last Mile Networking, Boston, MA, USA %D 2005 %T Deployment of Broadband Infrastructure in the Region of Western Greece %A Christos Bouras %A Vaggelis Kapoulas %A Antonios Alexiou %A Vaggelis Igglesis %A Mixalis Paraskevas %A I Scopoulis %A J Papagiannopoulos %X This paper presents the work that is taking place in the Region of Western Greece in order to develop state-of-the-art broadband infrastructure. The current status of broadband infrastructure in the region is being analyzed and the main principles on which the deployment of the networks will be based on is being described, by presenting the Metropolitan Area Networks and the Wireless access networks that will be developed. Two case studies of such municipal networks are also presented in this paper. %B 2nd IEEE/Create - net International Workshop on Deployment Models and First/Last Mile Networking, Boston, MA, USA %P 588 - 593 %8 7 October %G eng %0 Conference Paper %B Industrial Conference on Multi-Provider QoS/SLA Internetworking (MPQSI 2005), Tahiti, French Polynesia %D 2005 %T QoS issues in the Research and Academic Networks: The case of GRnet %A Christos Bouras %A Dimitris Primpas %A A Karaliotas %A Mixalis Paraskevas %A M Oikonomakos %A C Sintoris %X

This paper describes the design and the implementation of QoS services in a high speed backbone network as well as a management tool for the service. The services were designed taking advantage of features provided by the MPLS technology and also by using the DiffServ architecture. The supported QoS services include the IP Premium that tries to provide zero packet loss as well as minimum delay and jitter and the Less Than Best Effort service. In addition we implemented a management tool for the service. The scope of this tool is to allow the users to manage their QoS requests (make a new one, edit, delete or view a request). Also the tool performs admission control and produces the necessary configuration that must be applied on the network in order to implement every service’s request.

%B Industrial Conference on Multi-Provider QoS/SLA Internetworking (MPQSI 2005), Tahiti, French Polynesia %8 23 - 28 October %G eng %0 Conference Paper %B IADIS International Conference e – SOCIETY, Lisbon, Portugal %D 2003 %T Educational Information Society in Greece: The Greek School Network %A Christos Bouras %A Mixalis Paraskevas %X In this paper, we present the Greek School Network. This project is financed by the Second and Third Community Support Framework of the European Union. Research and Academic Computer Technology Institute (CTI) has the responsibility for the design, coordination and the implementation of the project. The main object of the project is the implementation of a network infrastructure for the interconnection of school laboratories and educational administration offices and the provision of network services in a wide range. It forms a closed educational network, which is based on the Greek educational and research backbone network (GRNET). The Greek School Network statistics show that teachers and students have adopted the services of GSN in their school life and learning activities. %B IADIS International Conference e – SOCIETY, Lisbon, Portugal %P 179 - 186 %8 3 - 6 June %G eng %0 Journal Article %J Journal of Telematics and Informatics, Elsevier Science, Vol. 20, Issue 1 %D 2003 %T Policies for Content Filtering in Educational Networks: The case of Greece %A Christos Bouras %A Maria Avgoulea %A Mixalis Paraskevas %A G Stathakopoulos %X The Internet removes all barriers to sending and receiving information. An increasing number of nations connect their schools on the Internet as an acknowledgment of its importance in education. Despite its undeniable usefulness, it also has certain perils. This study specifies and evaluates these, finding the technologies that are currently available to address filtering issues and comparing them. We present our proposed solution for the Greek School Network, and illustrate to what extent our solution successfully addresses the issues discussed. %B Journal of Telematics and Informatics, Elsevier Science, Vol. 20, Issue 1 %P 71-95 %G eng %0 Journal Article %J Learning Technology Newsletter – IEEE Learning Technology Task Force(on line), Vol. 5, Issue 2 %D 2003 %T Wireless School Network %A Christos Bouras %A A Karaliotas %A Mixalis Paraskevas %A V Papoutsis %A Christos Ntokos %A N Drosopoulos %X The architecture of the wireless network consists of 3 main parts. The wireless infrastructure, the connection of the wireless island to the rest network and the interconnection between the neighboring schools a near one participating in the wireless network. The wireless connection supports Point-to-Multipoint technology [3] and uses the frequency band 2,4 Ghz to 2,4835 Ghz. The reserved bandwidth of this wireless LAN is order of magnitude 11 Mbps. In each school the bridge device is connected to a newly equipped Fast Ethernet switch interconnecting the internal schools network to the wireless network. Between the schools a fast Ethernet network is built using copper and Fiber optic cabling. The interconnection of the wireless network upstream to the backbone is achieved with the use of the link between the E.A.O and the local main distribution node of the EDUNET network. This link had to be upgrade because it will carry the traffic from the wireless network too. The selected solution was the VDSL technology by engaging the appropriate modems over a two-wire leased line between the E.A.O and the main node. We have a selected point in each school unit that wireless bridge and antenna will be installed. The wireless bridge must stand near to antenna because long cabling distances will produce noise in the transmission signal. The wireless bridge will be housed at waterproof cabinet, which offers all the necessary specifications for protection and electric feeding. The waterproof cabinet is installed at the antenna pylon. %B Learning Technology Newsletter – IEEE Learning Technology Task Force(on line), Vol. 5, Issue 2 %8 April %G eng %0 Conference Paper %B ED – MEDIA 2002, Denver, Colorado, USA %D 2002 %T Policies for Content Filtering in Educational Networks : the Case of Greece %A Christos Bouras %A Maria Avgoulea %A Mixalis Paraskevas %A G Stathakopoulos %X An increasing number of nations connect their schools on the Internet as an acknowledgment to its extreme importance in the education area. Our study specifies the perils that arise from its use when the users are minors and evaluates the technologies that are currently available to address the filtering issues. The thoughts presented in this paper outline our proposed solution for the Greek School Network. By no means the thoughts that are presented here, apply for adults or people who pay to establish access to the Internet. %B ED – MEDIA 2002, Denver, Colorado, USA %P 57 - 62 %8 24 - 29 June %G eng %0 Conference Paper %B Towards the e-learning Community, Bolton International Conference, Bolton, UK %D 2000 %T Winds of Aiolos: How connect the Greek Schools in Internet %A Christos Bouras %A Mixalis Paraskevas %A Petros Ganos %A N Adamopoulos %A D Karaiskakis %X In this paper, we present the first Greek School Network, which is implemented by the project "Winds of Aiolos”. This project is subsumed in the framework of the European Community Action "Operational Program for the Education and Initial Vocational Training - Odysseia". Computer Technology Institute (CTI) has the responsibility for the design and the implementation of the project. On the basis of the influence of the networking technologies to the educational activities and according to the international experience, the usage of the network to the educational procedure acts as knowledgeable object, information source, learning tool and communication tool. The main object of the project is the implementation of a network infrastructure for the interconnection of school laboratories and educational administration offices and the provision of network services in a wide range. It forms a closed educational network, which is based on the Greek educational and research backbone network (GRNET). The Greek school network statistics show that the students prefer the Greek Domain. The educational units of the Greek School Network still act more as consumers than as creators in the information society. %B Towards the e-learning Community, Bolton International Conference, Bolton, UK %P 27 - 37 %8 19 - 20 October %G eng