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Due to crosstalk-induced interactions among different connections, malicious high-power jamming signals can potentially spread widely in a transparent optical network. Moreover, due to imperfect port isolation in wavelength selective switches (WSSs), present within the optical switching nodes, crosstalk also affects the quality of the transmitted signal. Therefore, it is necessary to design an optical...
Energy aware routing schemes for wavelength division multiplexing (WDM) optical networks can significantly reduce the overall energy consumption compared to other technologies. Much of the recent work has concentrated on switching off unused network components during low utilization periods. In this study, we present a comprehensive heuristic algorithm that performs routing and wavelength assignment...
This study looks into network planning issues for synthetic MCF-based SDM networks implemented through programmable ROADMs. The results show that significant savings in switching modules and energy can be attained by exploiting the flexibility inherent in programmable ROADM through a proper network design.
This paper considers the problem of logical topology selection in an IP-over-WDM network, with the objective to minimize the total power consumption used to support the traffic demands. While there are several power consuming devices in a backbone WDM network, it is assumed that major power consumption occurs at IP router ports, which are termination points of optical connections or lightpaths. The...
Recent contributions on energy-aware management, aimed at improving the energy efficiency of network infrastructures are based on a combined use of two levers: power consumption optimization obtained by (wholly or partially) switching off a single network device and traffic engineering strategies (with related algorithms) that, given the traffic model on a daily time period, minimize the global energy...
We propose a novel energy-efficient and survivable routing algorithm addressing the trade-off caused by conflicting objectives of energy saving and survivability, i.e. energy-efficient routing tends to pack while survivable strategies try to spread the traffic.
In this paper, we study green (energy efficient) optical networks with availability guarantee. After introducing a power consumption model for green optical network design, we propose a design method called Availability-Guaranteed Energy-Efficient Design (AGEED). In AGEED, we employ dedicated path protection as backup capacity in order to improve the availability. Based on iterative routing by modifying...
This paper is aiming at facilitating the energy-efficient operation of an integrated optical network and IT infrastructure. In this context we propose an energy-efficient routing algorithm for provisioning of IT services that originate from specific source sites and which need to be executed by suitable IT resources (e.g. data centers). The routing approach followed is anycast, since the requirement...
The explosive growth of Internet drives the development of high performance router. Applying distributed architecture, today's multi-shelf IP core router can provide flexible switch capacity from 1Tbps to 100Tbps. However, the more capacities it has, the more power it consumes, which is becoming a key barrier for bandwidth scaling. This paper studies the energy awareness in design of multi-shelf IP...
We investigate the benefit of utilizing electric price difference between time intervals of the day for networks covering multiple time-zones. We show that by exploiting this time-and-price variation electric bill can be significantly reduced.
This paper investigates the benefits of enabling services with differentiated energy-saving (DiffEnS) in WDM optical networks with traffic grooming capabilities. DiffEnS can reduce the operating cost (OPEX) as more customers gradually join green programs and subscribe to the energy efficient traffic services referred to as the Green. Based on a modular node design with grooming capabilities, two heuristic...
A distributed strategy for selecting the links to be set in sleep mode and re-routing the light-paths is proposed for WDM networks. GMPLS extension for advertising link sleep mode is introduced. Considerable power savings are achieved without affecting the blocking.
Power-awareness in networking attracts more attention as the trends in the energy consumption of the Internet raise growing concerns about the environmental impacts and sustainability of the network expansion. Building energy efficient equipment is definitely an integral part of the solution. However, such a strategy should be complemented with appropriate network protocols and routing methods to...
Nanoscale CMOS technologies are posing new network-on-chip (NoC) concepts to gigascale system-on-chip (SoCs). However, electronic network on chip designs face several problems like energy consumption, bandwidth and latency. Optical NoC (ONoC) promises to solve these problems. The advances in nanoscale photonic technology make ONoCs possible. This paper proposes a new non-blocking optical router, OXY,...
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