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Compared to other advance reservation systems, which use slotted-time algorithms, this BB work implements a novel AVL-tree based continuous-time algorithm and offers lower call rejection rate and higher resource utilization. Furthermore, instead of using the commonly-used but rigid ``all-or-nothing'' approach, this work proposes a novel probe-based reservation scheme which effectively supports flexibility in reservation requests. This scheme not only offers a faster way of obtaining alternative reservations, but also incurs less signaling and computational overheads. This BB has been implemented in simulation using NS-2 for performance evaluation, and also on Linux platform on an Internet2 QBone-compliant testbed.","abstract_html":"This thesis presents the work on bandwidth broker (BB) design which offers scalable and flexible resource reservation capability to Differentiated Services networks. 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