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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07 Apr 1991
TL;DR: It is shown that with the proposed output-buffered banyan switch, a maximum throughput of 1 can be achieved and no internal clock speedup is required.
Abstract: A report is presented on a queueing analysis and a simulation study of a switch fabric based on a buffered banyan structure whereby buffers are placed at the output links of each switching element. When buffers are located at the input links, it is well known that maximum throughput is limited to approximately 0.45 under a uniform input traffic pattern. This bottleneck is due to the head of the line (HOL) contention at each switching element and is intrinsic to input queueing. The authors propose a buffered banyan switch built from smaller knockout switches which are output-buffered switches. With small knockout switches as the basic switching elements, the complexity of the overall switch fabric is manageable and no internal clock speedup is required. Furthermore, it is shown that with the proposed output-buffered banyan switch, a maximum throughput of 1 can be achieved. >
27 citations
TL;DR: A digital free-space photonic switch structure that uses exciton absorption reflection switch (EARS) arrays that may be applicable to large-scale, multistage switching networks for optical interconnections and broadband telecommunication switching systems.
Abstract: We present a digital free-space photonic switch structure that uses exciton absorption reflection switch (EARS) arrays. The network topology of the switch is a banyan network. This switch structure uses microbeam interconnections to realize a compact switch fabric. The low-loss interconnection that is necessary for high-speed operation can be achieved by the use of an optical system based on birefringent plates. A prototype switch (based on an 8 × 8 EARS array) with fiber array pigtails is fabricated and used to demonstrate two-input, two-output switching of 8-Mbits/s signals. This digital switch may be applicable to large-scale, multistage switching networks for optical interconnections and broadband telecommunication switching systems.
27 citations
01 Oct 2008
TL;DR: In this article, a novel approach to monolithically implement RF MEMS T-type switches for redundancy switch matrix applications is presented, which achieves an insertion loss of 1.5 dB, a return loss of better than -20 dB and an isolation higher than 28 dB for all states for frequencies up to 30 GHz.
Abstract: This paper presents a novel approach to monolithically implementing RF MEMS T-type switches for redundancy switch matrix applications. The T-type switch performs three operational states: two turning states and one crossover state. A six-mask fabrication process is adapted to fabricate the proposed design. Novel RF circuits were used to implement the entire system, including series contact cantilever beams, RF crossover, 90 degree turns and four-port cross junctions. The measured results for the entire T-type switch demonstrate an insertion loss of 1.5 dB, a return loss of better than -20 dB and an isolation higher than 28 dB for all states for frequencies up to 30 GHz. To our knowledge, this is the first time an RF MEMS T-type switch has ever been reported.
26 citations
TL;DR: In this paper, a polarization-controlled free-space photonic switch based on a PI-LOSS switch was proposed, which has similar insertion loss and lower crosstalk compared to the conventional crossbar switch.
Abstract: We propose a polarization-controlled free-space photonic switch based on a PI-LOSS switch that has similar insertion loss and lower crosstalk compared to the conventional crossbar switch. We describe a multistage switching network with cross-connected PI-LOSS switch modules that is easier to control and smaller than other strictly nonblocking switch structures. >
26 citations
01 May 1992
TL;DR: The authors present a queuing analysis and a simulation study of banyan switch fabrics based on 2*2 switching elements with crosspoint buffering and indicate that crosspointbuffering provides throughput approaching the offered load under uniform traffic conditions.
Abstract: The authors present a queuing analysis and a simulation study of banyan switch fabrics based on 2*2 switching elements with crosspoint buffering. In particular, the results apply to the PHOENIX switching element based banyan fabrics. The results indicate that crosspoint buffering provides throughput approaching the offered load under uniform traffic conditions. The effect of bursty traffic on the performance of the switch is studied. It is shown that a speedup factor of three or more is required to achieve acceptable delay and packet loss probability. It is also shown that the amount of buffer space required per port increases linearly with the burst size for a desired packet loss performance. For a given burst size the packet loss rate decreases exponentially as the buffer size is increased. The impact of crosspoint buffering and shared buffering in the switching elements on the performance of the banyan fabric is analyzed. >
26 citations