Design and Analysis of Green Optical Line Terminal for TDM Passive Optical Networks

TL;DR

This paper introduces an energy-efficient OLT design for TDM PONs that dynamically adjusts active line cards based on real-time traffic, significantly reducing energy consumption while maintaining service quality.

Contribution

The paper presents a novel OLT architecture with adaptive line card activation and optical switching to minimize energy use in TDM PONs.

Findings

Reduces OLT energy consumption by adaptive line card management.

Maintains service quality during dynamic reconfiguration.

Demonstrates effectiveness through simulation results.

Abstract

This paper proposes a novel scheme which can efficiently reduce the energy consumption of Optical Line Terminals (OLTs) in Time Division Multiplexing (TDM) Passive Optical Networks (PONs) such as EPON and GPON. Currently, OLTs consume a significant amount of energy in PON, which is one of the major FTTx technologies. To be environmentally friendly, it is desirable to reduce energy consumption of OLT as much as possible; such requirement becomes even more urgent as OLT keeps increasing its provisioning data rate, and higher data rate provisioning usually implies higher energy consumption. In this paper, we propose a novel energy-efficient OLT structure which guarantees services of end users with the smallest number of power-on OLT line cards. More specifically, we adapt the number of power-on OLT line cards to the real-time incoming traffic. Also, in order to avoid service disruption resulted by powering off OLT line cards, proper optical switches are equipped in OLT to dynamically configure the communications between OLT line cards and ONUs.