Road to Energy-Efficient Optical Access: GreenTouch Final Results

Abstract

Abstract-The growing energy footprint of communication networks has raised concern about the sustainability of future network development. The GreenTouch consortium was founded to help counter this trend by developing and integrating green network technologies from the access to the core. In order to evaluate these technologies, an end-to-end network power model was developed in the form of the Green Meter, a tool to assess the overall impact and overall energy efficiency benefits from an entire portfolio of solutions. In this paper, we describe the methodology of the Green Meter for the residential fixed access portion, which was extended to include metro aggregation. A baseline architecture for optical access and metro aggregation networks is defined, and adapted to other scenarios integrating future technologies. The performance is each time evaluated through a mathematical model that captures the energy savings at the component level and has the ability to compute the overall system-level energy savings. We show that energy efficiency can be improved 29-fold over a decade (2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018)(2019)(2020) with business-asusual trends, and with the added effort of introducing GreenTouch solutions, this could be further improved to achieve a 257-fold increase in energy efficiency. The results confirm that an emphasis on green network design can indeed have a huge impact on reducing the energy consumption of optical access infrastructure.

Study on the Solutions to Heterogeneous ONU Propagation Delays for Energy-Efficient and Low-Latency EPONs

“…for this ONU according to (1). After that, the OLT will generate a GATE message containing the allocated bandwidth and the upstream transmission postponing time postpone T for the ONU, and will send the GATE and corresponding downstream data to the ONU.…”

“…In recent years, increasing demands from network users and advanced applications have prompted access networks undergone a rapid development [1]. More and more users are able to be supported in an access network and increasing numbers of access networks are being established.…”

Bandwidth Prediction Based Resource Allocation Scheme for Low-Latency and Energy-Efficient PONs With Heterogeneous ONU Propagation Delays

“…n recent years, with the rapid development of digital era and the adoption of advanced technologies such as Internet of Things (IoT), the number of users/devices connected by telecommunication networks has been growing exponentially [1]- [3]. This rapid growth of users/devices boosts the expansion of the quantity and the scale of access networks, resulting in access networks being a major contributor to global energy consumption [4].…”