Hybrid networks are networks capable of switching data at multiple levels (optical and IP packet level) by means of multi-service optical switches. As a result of that, huge flows at the IP-level may be moved to the optical-level, which is faster than the packet-level. Such move could be beneficial since congested IP networks could be off-loaded, leaving more resources for other IP flows. At th...

Arrayed waveguide grating (AWG) is a promising technology for constructing high-speed large-capacity WDM switches, because it can switch fast, is scalable to large size and consumes little power. To take the full advantage of high-speed AWG, the routing control of a massive AWG-based switch should be as simple as possible. In this paper, we focus on the self-routing design of AWG-based switches...

N x N optical crossbar switches provide photonic switching networks with non-blocking programmable interconnections that have a channel bandwidth compatible with optical fibers. These switches have been realized in two basic forms: integrated-optic and free-space optical crossbars [l-21. Processing of information to set-up It is expected that optical interconnection networks will be required to...

Deflection Routing is proposed for all optical core switches because of the lack of optical memory. In Shortest-path Deflection Routing, switches attempt to forward packets along a shortest hop path to their destinations. Each link can send a finite number of packets per time-slot (the link capacity). Incoming packets have to be sent immediately to their next switch along the path. If the numbe...

We evaluate the performance of optical network designs using relatively few switch nodes at which wavelength conversion and electronic regeneration is possible. A simple heuristic for placing the fewest such nodes to reach a given blocking probability is based on the ranked frequency of shortest-path routes transiting each node. This strategy is found to be efficient in designing a translucent ...

High Performance Computing Systems will have a mix of optical and electrical interconnects as demonstrated by the IBM PERCS (Programmable Easy to Use Reliable Computing Systems) in order to balance energy efficiency, scalability, and performance. In this paper we start with the PERCS design and show how network latency can be reduced by using optical packet switches in the system level intercon...

Using optical technology for the design of packet switches/routers offers several advantages such as scalability, high bandwidth, power consumption, and cost. However, reconfiguring the optical fabric of these switches requires significant time under current technology (microelectromechanical system mirrors, tunable elements, bubble switches, etc.). As a result, conventional slot-by-slot schedu...

Residue number system (RNS) enables dimensionality reduction of an arithmetic problem by representing a large number as a set of smaller integers, where the number is decomposed by prime number factorization using the moduli as basic functions. These reduced problem sets can then be processed independently and in parallel, thus improving computational efficiency and speed. Here we show an optic...