Topic
Banyan switch
About: Banyan switch is a research topic. Over the lifetime, 242 publications have been published within this topic receiving 3452 citations.
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27 Nov 1989
TL;DR: The author proposes a modular architecture for very large packet switches, where each switch consists of a Batcher sorting network, a stack of binary trees, and a bundle of banyan networks, and it can be physically realized as an array of three-dimensional parallel processors.
Abstract: The author proposes a modular architecture for very large packet switches, where each switch consists of a Batcher sorting network, a stack of binary trees, and a bundle of banyan networks. The modular architecture is a unification of the Batcher-banyan switch and the knockout switch, and it can be physically realized as an array of three-dimensional parallel processors. Switch modules are interconnected only at the outputs of multiplexers. The modularity implies less-stringent synchronization requirements and makes higher-speed implementation possible. Nonblocking and self-routing properties of Batcher-banyan switches are used to simplify the switch operation and to avoid the internal flow control problem. Also described is an extended ring reservation algorithm for contention resolution and output space extension. The proposed modular switch is intended to meet the needs of broadband telephone offices of all sizes. The author estimates that a modular switch with terabit capacity can be built with current VLSI technologies. >
40 citations
TL;DR: The theoretical scaling limits of transparent nonblocking optical switches based on MEMS electrostatic tilt mirror devices are examined and it is suggested that conventional switch topologies do not allow a favorable tradeoff between switching speed and optical efficiency or crosstalk.
Abstract: Transparent optical circuit switching can improve the aggregate bandwidth, scalability, and cost of data center networks provided, it can meet the performance requirements on switching speed, port count, and optical efficiency. Here, we examine the theoretical scaling limits of transparent nonblocking optical switches based on MEMS electrostatic tilt mirror devices. Using physical optics and electromechanics, we present a first principles analysis of how the response speeds of a set of canonical devices scale as a function of switch port count, crosstalk, and insertion loss. Our model indicates that the optimal actuator design (parallel plate versus vertically offset comb) and actuation method (digital versus analog) changes as a function of switch port count. It also suggests that conventional switch topologies do not allow a favorable tradeoff between switching speed and optical efficiency or crosstalk. However, high switching speeds can be achieved by multistage switch architectures such as the two examples we describe, a multiport wavelength switch and a wavelength-independent space switch.
38 citations
TL;DR: In this article, high-order, bidirectional, DC-20-GHz switch networks are discussed using single-chip 1*2, 1*4 and 2*2 switch MMICs.
Abstract: High-order, bidirectional, DC-20-GHz switch networks are discussed. Single-chip 1*2, 1*4, and 2*2 switch MMICs have been demonstrated. Multiple chips have been used to demonstrate 4*4 and 1*16 switches. The switches all use a combination of series and shunt passive FET switching elements. The 1*4 switch is made of a single stage of switching elements, rather than the usual two stages of 1*2 switches. The 2*2 switch is comprised of two stages of 1*2 switches. The multiple-chip 4*4 switch is made of four stages of 1*2 switches (using the 2*2 switch MMICs). Two stages of 1*4 switches are used to make the 1*16 switch. >
37 citations
TL;DR: In this paper, a traveling-wave amplifier is integrated into the slip waveguide of a carrier-injection type optical single-slip structure (S/sup 3/) switch.
Abstract: A lossless and low-crosstalk optical switch is most desirable for large-scale photonic networks. To realize such a switch, a traveling-wave amplifier is integrated into the slip waveguide of a carrier-injection type optical single-slip structure (S/sup 3/) switch. We demonstrate fiber-to-fiber lossless and low-crosstalk (40 dB ON/OFF ratio) characteristics of two of four elements in a 2*2 crossbar optical switch that integrates four amplifiers and eight Y-branch optical switches. >
37 citations
TL;DR: In this paper, a novel digital thermo-optic switch based on a polymer waveguide was demonstrated, which consists of a conventional 1/spl times/2 digital optical switch and compact variable optical attenuators, with both elements integrated in series.
Abstract: A novel digital thermo-optic switch based on a polymer waveguide has been demonstrated. The proposed switch consists of a conventional 1/spl times/2 digital optical switch and compact variable optical attenuators, with both elements integrated in series. The switches exhibit very low crosstalk values of -42 and -40 dB, and the switching power is /spl sim/170 mW at 1.5 /spl mu/m.
35 citations