Sleep Mode Operation of Optical Networks for Power Consumption Minimization: a Case Study of Ethio Telecom Backbone Optical Transport Network
No Thumbnail Available
Date
2018-11
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
AAU
Abstract
Due to the growth in data traffic volume and diversification of applications that use telecommunication
network infrastructure more power consuming telecommunication network equipments
have been deployed. This scenario, although efforts are made to minimize the power
consumption of the deployed equipments, has led to an increase in the power consumption
of the sector. When it comes to backbone networks this increase in power consumption is
more dependent on the traffic level, which is the aggregate traffic from all access segments,
and on the number of subscribers on the access side. In the future it is expected that one
of the bottlenecks in the development of the telecommunication sector will be its power
consumption. In order to overcome this problem, stake holders in the sector are striving to
come up with ways to minimize this power consumption.
In this thesis, the sleep mode operational strategy which enables some components in
the network to operate in sleep or low power consumption state after rerouting traffic on
the remaining components, is assessed. After investigation of different algorithms proposed
under this strategy, an approach which takes the Physical Layer Impairment (PLI), power
loss/attenuation, together with other constraints is proposed. An evaluation of the approach
is carried out on an optimization platform and a simulation environment and results analyzed
taking two Ethio Telecom backbone Optical Transport Network (OTN) segments as a
case study. These optimizations & simulations help to analyze impacts on Quality of Service
(QoS) of applying this approach in addition to its main goal of power consumption
minimization. Results reveal that up to 51% and 44% of power saving can be achieved at
maximum link utilization thresholds of 70% and 50% for AA backbone and N-E backbone
segments respectively. In addition, the evaluations show the trade-off between power saving
and QoS using different parameters.
Description
Keywords
Attenuation, Consumption, Energy, Power, QoS, Sleep mode, Utilization