Undugodage, Salitha Priyanka creator Chindakorn Tuchinda Chairperson Makelainen, Kimmo Examination Committee Yulu, Qi Examination committee DAAD (Federal Republic of Germany) Scholarship donor text th Bangkok Asian Institute of Technology 1996 monographic eng

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63 p. LANs are becoming strategic elements of computer based work environment. Due to increases in processing power and storage capacity, today's computers have the ability to handle high quality multimedia applications. But with the limited operational speeds and medium access techniques, traditional local area networking technology is inadequate to handle the resources demanding for such applications. The delay experienced in a traditional LAN has always being a constraint and had led to a need for higher speed networks. Fast Ethernet is considered to be one of the emerging technologies in high speed networking environment. lOOBase-T is a well known Fast Ethernet which is simply an extension of CSMA/CD based Ethernet technology. The other known Fast Ethernet is I OOBase-VG which uses a different transmission method known as Demand priority. The advantages over CSMA/CD is it eliminates collision and provides priority for real time sessions in multimedia. But complete change over from CSMA/CD based technology in local area networking is considered to be harmful in the development of a cost effective networking solution for multimedia applications. In this research we propose a dual medium access Fast Ethernet LAN based on both CSMA/CD and a Token reservation protocols. This design not only provides fixed and bounded delay for real time sessions, but also improves the performance of non real time traffic. The design features a hybrid mode of operation where the medium access techniques switches in to three different modes, according to the types of traffic available. When there is no real time sessions the operation mode is known as No request mode. In this mode both networks are based on CSMA/CD decentralized medium access scheme. When the first real time session arrives the mode of operation switches in to a mode known as Normal request mode. With this mode one of the networks operate based on Token reservation protocol with a centralized medium access scheme, giving necessary bandwidth for real time sessions on request. When the bandwidth requirement for real time sessions exceeds a defined admission control policy, the mode of operation switches in to a mode known as High request mode. In this mode both networks are based on Token reservation centralized medium access scheme. An admission control policy is defined to control the bandwidth occupied by real time sessions to ensure better performance for non real time traffic. All these modes of operation are then evaluated based on a computer simulation A thesis proposal submitted in partial fulfillment of the requirements for the degree of Masters of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1996 Ethernet (Local area network system) Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B14984 http://203.159.5.9/ait-thesis/detail.php?q=B14984 180698 20260818090213.0