The GIGAswitch system is a high-performance packet-switching platform built on a 36-port 100 Mb/s crossbar switching fabric. The crossbar is data link independent and is capable of making 6.25 million connections per second. Digital's first GIGAswitch system product uses 2-port FDDI line cards to construct a 22-port IEEE 802.1d FDDI bridge. The FDDI bridge implements distributed forwarding in h...

Unbuffered crossbars or switching fabrics contain no internal buffers, and function using only input (VOQ) and possibly output queues. Schedulers for such switches are complex, and introduce increased delay at medium loads, because they have to admit at most one cell per input and per output, during each time slot. Buffered crossbars, on the other hand, contain sufficient internal buffering (N ...

System area networks (SANs) need to support low-fanout multicasts efficiently in addition to broadcasts and unicasts. A critical component in SANs is the switch, which is commonly designed around crossbars. We present new switch designs using a combination of low-cost multistage switching fabrics and input and output buffering with hardware based packet scheduling mechanism. Using detailed simu...

Article history: Received 2 April 2015 Received in revised form 25 June 2015 Accepted 7 August 2015

PipeRench is a configurable architecture that has the unique ability to virtualize an application using dynamic reconfiguration. This paper investigates the potential benefits and costs of implementing this architecture using an asynchronous methodology. Since clock distribution and gating are relatively easy in the synchronous PipeRench, we focus on the benefit due to decreased timing pessimis...

The optical components of a 64× 64 optoelectronic crossbar interconnect are described. The specifications and performance of the bulk, micro-optic, diffractive and thin-film components are discussed.

We consider a circuit paradigm that combines conventional silicon microelectronics with emerging self-assembled nanoelectronics. Peripheral CMOS circuitry is used to drive the input signals and restore the output signals of nanoscale crossbar structures. We address a number of issues dealing with interfacing CMOS and nanoelectronics. Furthermore, we consider important metrics, such as, delay, a...

Shuffle operations are one of the most common operations in SIMD based embedded system architectures. In this paper we study different families of shuffle operations that frequently occur in embedded applications running on SIMD architectures. These shuffle operations are used to drive the design of a custom shuffler for domain-specific SIMD processors. The energy efficiency of various crossbar...

Emotion has been considered as an important concept of embodied systems. A learning agent, Crossbar Adaptive Array, which implements the concept of emotion in its learning and behavioral scheme is described. Some issues relevant to embodied intelligence and reinforcement learning are also discussed.