The existing forward planning conflict-free (FPCF) packet switches are designed for fixed-size packets and synchronous operation mode. In this paper an asynchronous FPCF packet switch for variable-size packets is proposed. The key problem of efficient packet insertion procedure was solved by introduction of a so-called quasi-synchronous record array arrangement. A performance evaluation based o...

The wide deployment of wavelength-division multiplexing technology and new transmission techniques have resulted in significant increases in the transmission capacity in optical fibers, both in the number of wavelengths and the bandwidth of each wavelength channel. Meanwhile, the fast growth of the Internet demands more data switching capacity in the network in order to deliver high bandwidth t...

In this paper, a scalable variable-length packet switch using multistage interconnection network is proposed. The architecture consists of multiple non-buffer switch elements, interconnected with perfect shuffle pattern and with ring topology. Each input port is connected to a switch element in a different stage, and packets applied from these ports are routed to their destined output ports bas...

As the traffic volume on the Internet increases exponentially, so does the demand for fast switching of packets between asynchronous high-speed routers. Although the optical fiber can provide an extremely high capacity, the Internet switches still remain the main point of traffic bottleneck. The packet switching time may run up to nanoseconds in such routers with more than thousands ports, each...

A novel architecture is proposed for future multi-terabit IP (internet protocol) routers, employing multiple cascaded stages of optical switching and buffering. WDM is used within the node to facilitate its operation. External synchronization is not required, and a void-filling algorithm is used to simplify hardware requirements. Packet priorities are not implemented in the current version of t...

An optical packet switch that shares both limited range and full range wavelength converters for contention resolution is proposed with the aim to guarantee a high conversion cost saving. To optimally dimension the number and the conversion range of the wavelength converters, an analytical model, validated by simulation, is introduced. Numerical results show that the proposed switch architectur...

Today the energy consumption of Information and Communication Technology (ICT) industry is a significant contributor to the total energy demand in many developed countries. Recent studies show that the ICT industry is responsible for about 2% of the global emission of CO2 and this percentage is predicted to increase as the Internet expands in bandwidth and reach. In this chapter we highlight di...

The multi-plane banyan-type switching fabric is a very promising architecture for building nonblocking optical switches. To avoid blocking states many copies of planes, i.e. log2N switching fabrics are connected in parallel, so we call this structure multi-plane. In this paper, repackably nonblocking multi-plane banyan-type switching fabrics are considered. Two repacking algorithms for multi-pl...

We address the problem of scheduling unsplittable flows using a number of switches in parallel. This has applications in optical switching and eliminates the need for re-sequencing in traditional packet switching. The use of parallel switches is becoming increasingly popular [1], [2] since it provides a way of building a high-speed switch while overcoming the speedup requirement imposed on the ...