An Analysis for End-to-End Delay Based on WFQ Policy in the Real-Time Ethernet

Abstract

Real-Time Ethernet is based on Ethernet and provides a deterministic network with guaranteed service to real-time data transmission in reliable applications. The analysis of end-to-end delays is required in order to determine upper bounds in real-time Ethernet. This paper evaluates end-to-end delay bounds of transmitting heterogeneous flows, including real-time data, multimedia and best-effort data flows, in a real-time Ethernet network that uses Weighted Fair Queuing (WFQ) scheduling policy on switch output ports. We compare the WFQ-based scheduling policy with current scheduling algorithm, i.e. FIFO. Experiments show that WFQ can decrease delays and improve performance while comparing with traditional queuing algorithm.