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Networking Technology


Due to ever increasing demand of transporting huge amount of information generated from various sources such as voice, data, video, etc., modern telecommunication networks have been transformed into all digital and broadband.  Depending on the characteristics of information sources and the availability of facility, the mode of transportation can be either constant bit rate (CBR) using circuit switched networks or variable bit rate (VBR) using packet switched networks.  For efficient utilization of the network, all kinds of information can be transported using BISDN (Broadband Integrated Services Digital Network) and ATM (Asynchron-ous Transfer Mode) technology.  One important research area in Network Technology is the design of high speed digital  network with good performance.  The issues need to be investigated include modelling of VBR video traffic, efficient assignment of heterogeneous traffic classes with diverse quality of services, optimal bandwidth allocation, routing and call admission control etc.  A physical ATM network testbed has been set up at HKUST to facilitate the research.  Other research areas include IP (Internet Protocal), Quality of Service, Differentiated Service (DiffServ), and IP multicast.  In particular, a diffserv-capable router based on Linux is currently being developed for the support of videoconferencing, multimedia remote learning, IP telephony, and virtual privot netowrk (VPN).  Also, a novel programmable and protocal-independent platform is being constructed to handle both the ATM and IP traffic in a much faster and more efficient way.