Banyan switch

About: Banyan switch is a research topic. Over the lifetime, 242 publications have been published within this topic receiving 3452 citations.

Batcher and banyan switching elements

Abstract: A 2×2 Batcher switching element (18) and a 2×2 banyan switching element (19) are formed utilizing dynamic charge storage devices (DL1, DL2, ILD0) and pipelined processing (100, 300). This enables the Batcher and banyan switching elements to be fast enough to switch data cells which are transmitted using the Asynchronous Transfer Mode.

Scalable SiPh-InP Hybrid Switch Based on Low-Loss Building Blocks for Lossless Operation

Abstract: We design and experimentally demonstrate scalable $2\times2$ , $4\times4$ and $8\times8$ silicon photonic (SiPh) thermo-optic switch exhibiting low loss, low crosstalk, low power penalty, and BER below 10−10 for payload data transmission. Less than 3.13 dB insertion loss (IL) and approximately 20.5 dB crosstalk is measured in the $8\times8$ SiPh banyan switch with thermal phase shifters. We also report on a semiconductor optical amplifier (SOA) in an indium phosphide (InP) technology platform with 25 dB gain and 7 dB noise figure enabling to transmit optical signals with large OSNR. Combining SiPh and InP technologies, we propose a lossless hybrid switch matrix with distributed SOA-based gain capable of transmitting data with near zero loss and low crosstalk over a large switching matrix. In hybrid SiPh/InP switches, the SOA gain compensates for the SiPh switch loss at the cost of amplified spontaneous emission (ASE) noise but mitigated by bandpass optical filters. Lower IL from the SiPh switch requires less gain from the SOAs leading to less OSNR degradation. Experimentally validated building blocks confirmed scalability up to $64\times64$ in SiPh-InP hybrid platform.

A low-overhead multicast bufferless router with reconfigurable Banyan network

Abstract: In modern Multi-Processors System-on-Chip (MP-SoC), it is highly desirable to provide hardware support for efficient multicast traffic. Recently, bufferless router has become a promising solution for NoC due to its simplicity and low overhead. However, existing multicast bufferless routers utilize the serialized switch allocator to allocate both unicast and multicast packets based on the packet priority one by one, which makes the router have a long critical path and lowers the frequency of the router. In this paper, we propose a low-overhead multicast bufferless router with a reconfigurable Banyan network (called Banyan_PR, PR is short for packets replication). The Banyan switch of the router can be configured as four modes (straight, exchange, U-multicast and L-multicast) according to the type of the incoming packets. For the U-multicast and L-multicast configurations, the multicast packet can be replicated adaptively to reduce the multicast latency. Using a 4 x 4 Banyan network instead of the serialized switch allocator, the Banyan_PR router has shorter critical path length and less area overhead. Synthesis results under a 28nm technology show that the Banyan_PR router can achieve the frequency of 1GHz and save 65% less area and 89% less power consumption than the existing deflection-routing-based multicast bufferless router (called DRM_PR_all) with the serialized switch allocator. Simulation results illustrate that the Banyan_PR router achieves 25%, 28% and 19% less latency on average than that of the router without packets replication (called Banyan_noPR) and 39%, 42% and 35% less latency on average than that of the DRM_PR_all router under three synthetic traffic patterns respectively.

Design of 4x4 Banyan Optical Switch Using Optoelectronic MZI Switches with Low Crosstalk

Abstract: We introduce here a designing of 2x2 MZI (Mach-Zehnder Interferometer) optical switch. The switching of the optical signal is realized with the use of fast electro-optical effects. The designed model has a very high switching capability and is extremely reliable. Various design parameters have been varied to improve the performance of the switch. Then the basic 2×2 switch is exploited in design of 4×4 banyan switch. Banyan switch is a good candidate for further use in higher order switches. Simulation results are shown for 2×2 and 4×4 banyan architecture with low cross-talk values.

1 × 2 lossless semiconductor optical switch

Abstract: The addition of curved output guides to a twin-guide laser amplifier switch has enabled the first demonstration to be made of a compact 1×2 semiconductor optical switch that exhibits fibre-to-fibre gain and low crosstalk.