Tony K. C. Chan

We propose a new web hosting service with statistical capacity guarantee. By using this service, each customer subscribes to a certain capacity; that is, the speed that the web hosting system processes and transfers the web content, for his/her web site. The system provides the requested capacity to each web site with a probability of p where p is...

We consider the problem of upgrading unicast all-optical networks to support multicast communication. In upgrading, it is necessary to modify the existing nodes to support optical multicast switching. It is desirable to: (i) retain and use the existing node components while adding the necessary components so that the upgrading cost is small, and (i...

Time-domain wavelength interleaved network (TWIN) is an elegant and cost-effective all-optical network designed by a group of researchers in Bell Labs. It emulates fast optical switching via fast tunable lasers at the network edge, so it does not need optical switching and buffering in the network core. TWIN can be upgraded to provide larger capaci...

All-optical multifiber networks may require large and expensive optical switches (i.e., optical switches with many inputs/outputs). To tackle this problem, the existing approach adopts an individual node perspective and focuses on designing the internal node architectures that require smaller optical switches (i.e., optical switches with fewer inpu...

Wavelength converters can significantly improve the blocking performance of all-optical networks. The existing node architectures require large optical switches for sharing the wavelength converters. This letter proposes a new node architecture called shared-by-wavelength-switches . This node architecture requires significantly smaller and cheaper...

We design an interactive video-on-demand (VOD) system using both the client-server paradigm and broadcast delivery paradigm. Between the VOD warehouse and customers, we adopt a client-server paradigm to provide an interactive service. Within the VOD warehouse, we adopt a broadcast delivery paradigm to support many concurrent customers. In particula...