Energy-efficient, EDFA lifetime-aware network planning along with virtualized elastic regenerator placement for IP-over-
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ORIGINAL PAPER
Energy‑efficient, EDFA lifetime‑aware network planning along with virtualized elastic regenerator placement for IP‑over‑EON Pramit Biswas1 · Aneek Adhya2 Received: 9 November 2019 / Accepted: 16 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this paper, we focus on energy-efficient network planning (including traffic provisioning) along with optimal placement of virtualized elastic regenerators (VERs) for IP-over-elastic optical networks based on a static traffic profile, using a mixed integer linear programming-based optimization model. The proposed model judiciously exploits flexibility of IP core routers, sliceable bandwidth variable transponders (SBVTs) and VERs to accommodate the traffic demands with the minimum power consumption (PC). Optical layer traffic grooming allows to simultaneously originate/terminate multiple lightpaths of different capacities, data slots and maximum transparent reach by a single SBVT. The proposed model also allows to use all functionalities of VER, such as simultaneous regeneration, distance-adaptive transmission option selection, frequency slot merging to be used concurrently for the given static traffic profile. In addition, the proposed model includes lifetime awareness of Erbium-doped fiber amplifier (EDFA) to reduce EDFA failure and associated repairing cost in long run. Using the proposed model, we enhance the average EDFA lifetime by restricting average EDFA occupancy, represented by the ratio of the (average) number of lightpaths being amplified in an EDFA and the maximum possible number of lightpaths that can be amplified in it, even though in the process, the overall PC in network may increase, with reference to the scenario with no EDFA occupancy restriction. The variation in PC and average EDFA lifetime for different permissible (user-defined) average EDFA occupancy are studied. We exhaustively study performance of the model under different network conditions. Keywords Energy efficiency · Elastic optical network (EON) · Virtualized elastic regenerator (VER) · Sliceable bandwidth variable transponder (SBVT) · Erbium-doped fiber amplifier (EDFA) lifetime
1 Introduction With the rapid growth in Internet traffic volume, energy consumption in communication network may rise up to 51% of the global electricity consumption by 2030 (in the worstcase), provided enough improvement in energy efficiency of the network is not implemented [1]. Although with low Internet traffic volume, energy consumption occurs dominantly in the access network, it is expected that as Internet traffic exceeds the zettabyte threshold, energy consumption in core network will overtake that of the access network [2]. Thus, energy efficiency for core network is an important
* Pramit Biswas [email protected] 1
Indian Institute of Technology Patna, Patna, India
Indian Institute of Technology Kharagpur, Kharagpur, India
2
area of research, especially with rapidly increasing traffic of future years. Elastic optical network (EON)
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