Teaching and Research Labs

Broadband-Network Laboratory

The laboratory is used to conduct both teaching and research experiments related to broadband communication networks. An experimental Asynchronous Transfer Mode (ATM) network testbed consisting of four local ATM switches has already been set up. This 4-node ATM network was connected to two other tertiary universities (HKU and CUHK) through the SONET ring provided by Hongkong Telecom. The SONET-OC3 (155 Mbps) interface has been used throughout for interconnecting all the ATM switches, whereas both SONET-OC3 (155 Mbps) and TAXI (140 Mbps) interfaces have been used for direct connection between switches and multimedia workstations. Currently the ATM-ready multimedia workstations consist of SUN Sparc workstations and Pentium PCs. The laboratory has software simulation tools such as BONeS and CSIM to do computer simulation for the performance evaluation of communication-network design and analysis. The laboratory is also equipped with network protocol analyzers for LANs and ATM networks.

The current research issues being investigated include the study of MPEG variable-bit-rate video modelling, access protocols, routing algorithms, LAN interconnection, bandwidth allocation, buffer management, flow control, congestion control for Broadband Integrated Services Digital Network (BISDN) using ATM technology, wireless ATM, and quality of service guarantee in the Internet.