A VLSI crossbar switch with wrapped wave front arbitration

Abstract

Abstract-Crossbar switch is a key component of communication switches used in networks. Allocation of resources has a direct impact on packet transmission. A poor allocation results in long transmission delays. Hence, switches must include an arbiter that efficiently allocates the crossbar's resources. In this brief, a novel VLSI CMOS implementation of a high performance wrapped wave front arbitration (WWFA) for crossbar switches is described. Arbitration time is one of the critical factors that affect network performance. WWFA requires a two-dimensional arbitration that incorporates a rotating priority to provide fair arbitration. In this brief, we describe the design and implementation of this arbiter. The arbiter is capable of performing an arbitration in 1.15 ns using 0.5-m technology, for a 4 4 crossbar. We also include the description of interface and crosspoint (CP) control circuitry, i.e., request-acknowledge circuit and CP controller circuit respectively.

Power complexity of multiplexer-based optoelectronic crossbar switches

“…Referring to (10), the power consumed by horizontal broadcast busses, each with bits, is therefore (11) Equation (11) is useful to determine the power consumed by the broadcast busses, including the power on the input ports of the multiplexer cell on the busses, which is also counted in (9). The power consumed by the horizontal bus wires alone is given by (12) As shown in Fig.…”

A run-time reconfigurable Network-on-Chip for streaming DSP applications

“…Thus, no prediction can be made about the throughput allocated to a VC. Another switch allocation solution is the wrapped wave front arbiter [28,77]. This type of arbiter also prevents packet starvation, but it does not allocate bandwidth fairly to VCs and no prediction can be made about the VC throughput.…”