Resilience in PON-based data centre architectures with two-tier cascaded AWGRs

TL;DR

This paper compares the resilience and performance of two AWGR-based PON data centre architectures under link failures, showing that the two-tier design reduces power consumption and delay significantly.

Contribution

It introduces a MILP model to optimize traffic routing in two-tier AWGR architectures and evaluates their resilience and efficiency.

Findings

Two-tier AWGR architecture reduces power consumption by up to 10%.

Delay is reduced by up to 61% in the two-tier design.

The two-tier architecture demonstrates improved resilience under link failures.

Abstract

This paper investigates the performance of a two-tier AWGR-based Passive Optical Network (PON) data centre architecture against an AWGR-based PON data centre architecture by considering various scenarios involving link failures to evaluate the resilience of both designs. To optimize traffic routing under different failure scenarios, a Mixed Integer Linear Programming (MILP) model is developed and the power consumption and delay performance is assessed. The results demonstrate that the two-tier AWGR architecture reduced the power consumption and the delay compared to the AWGR-based architecture by up to 10% and 61%, respectively.