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T1. Human-Computer Interaction based on Discourse Modeling T2. P2P-SIP: A Standardised P2P Approach to Multimedia Communications T3. Amateur Radio Telecommunications and Networking in Education DETAILS T1. Human-Computer Interaction based on Discourse Modeling Topics Proposed technical areas Prerequisite knowledge T2. P2P-SIP: A Standardised P2P Approach to Multimedia Communications The Session Initiation Protocol (SIP) is an IETF standardised lightweight protocol for multimedia signalling and communication over the Internet. Due to its various advantages, SIP has been used as a platform for a wide range of services such as Voice over IP, multimedia streaming, and video on demand. However, SIP suffers from various scalability and redundancy limitations because its architecture relies on various centralised components. To overcome some of these limitations, there has been various proposed architectures for using SIP in a fully decentralised manner, with minimal or no centralised authorities. In order to provide a standardised approach to overcome these limitations in SIP, an IETF working group has been formed with the aim of working on the specifications necessary to extend SIP towards a peer-to-peer (P2P) architecture. This approach is known as P2P-SIP and it is based on the use of P2P overlays for the insertion, location, and management of SIP resources in multimedia networks. By replacing the centralised authorities in convention SIP with P2P overlays, multimedia clients can fully have end-to-end communications which in returns makes the system highly stable and redundant. In this tutorial, we provide an overview of P2P-SIP and an in-depth description of its architecture, protocol, and application. We revisit the roadmap that led to the ongoing standardisation process and elaborate on how P2P-SIP fits in the more general telecom panorama. The tutorial is accompanied by a practical demonstration of a P2P-SIP system that will help consolidating the theoretical aspects of the protocol and appreciating its practical use. The audience is expected to be familiar with general P2P principles and motivations but does not need to have previous knowledge of SIP. This is a half-day tutorial with the following outline:
T3. Amateur Radio Telecommunications and Networking in Education This tutorial introduces amateur radio and its popular computer-related communication modes to both teaching and managing personnel of academic EE & CS and high-grade technical education, elementary school teachers and students of all levels of education. The purpose of tutorial is to motivate teachers to use amateur radio as an educational technology and experiment with wireless computer networks (AMUNETs - the Amateur Radio University Networks) - within their schools and university campuses; next to make connections with surrounding educational institutions, and finally to establish radio links with other parts of the globe. An AMUNET is an affordable solution for remote and rural areas, including developing countries where cell telephony infrastructures and Internet connectivity are underdeveloped. Amateur radio supports requirements of not only education institutions, but public services, scientific expeditions etc. This tutorial is a survey of several topics: Scientific and social roles of the amateur radio in a community; Description of basic two-way computer-related radio links, as well as more complex communications over ‘digipeaters’ (digital repeaters, relay stations); Using of the amateur radio satellites; Connectivity to the TCP/IP world i.e. the Internet; Hardware choices (modems, radios, antennas, computers) and software (servers, clients, repeaters); Regulatory questions, consequences and solutions (new proposal of ADL license); Influence of the amateur radio to the national and international regulatory system; AMUNETs - the Amateur Radio University Networks, funding the further projects and development. What will tutorial participants learn? |
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