Journal ArticleDOI
Degraded service provisioning in mixed-line-rate WDM backbone networks using multipath routing
TLDR
This work proposes a mixed-integer-linear-program (MILP) solution and a computationally efficient heuristic, and considers two partial-protection models to support degraded services in mixed-line-rate networks.Abstract:
Traffic in optical backbone networks is increasing and becoming more heterogeneous with respect to bandwidth and QoS requirements due to the popularity of high-bandwidth services (such as cloud computing, e-science, telemedicine, etc.), which need to coexist with traditional services (HTTP, etc.). Mixed-line-rate (MLR) networks that support lightpaths of different rates such as 10, 40, 100 Gb/s, etc., are being studied to better support the heterogeneous traffic demands. Here, we study the important topic of degraded services in MLR networks, where a service can accept some degradation (i.e., reduction) in bandwidth in case of a failure in exchange for a lower cost, a concept called partial protection. Network operators may wish to support degraded services to optimize network resources and reduce cost. We propose using multipath routing to support degraded services in MLR networks, a problem that has not been studied before and is significantly more challenging than in single-line-rate (SLR) networks. We consider minimum-cost MLR network design (i.e., choosing which transponder rates to use at each node), considering the opportunity to exploit multipath routes to support degraded services. We propose a mixed-integer-linear-program (MILP) solution and a computationally efficient heuristic, and consider two partial-protection models. Our illustrative numerical results show that significant cost savings can be achieved due to partial protection versus full protection and is highly beneficial for network operators. We also note that multipath routing in MLR networks exploits volume discount of higher-line-rate transponders by cost-effectively grooming requests over appropriate line rates to maximize transponder reuse versus SLR.read more
Citations
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Journal ArticleDOI
Survivable multipath routing of anycast and unicast traffic in elastic optical networks
TL;DR: The results show that the SMA method finds good-quality solutions in a reasonable amount of time and that survivable multipath routing in EONs requires additional spectrum resources, up to 45%.
Journal ArticleDOI
Service Degradability Supported by Forecasting System in Optical Data Center Networks
TL;DR: A provident service degradation (service degradability) framework based on the traffic-demand forecasting system is proposed that helps to precisely know when service degradable becomes necessary, together with the exact location of overload, and can be adopted at appropriate times and locations.
Journal ArticleDOI
On Energy Efficient Survivable Multipath Based Approaches in Space Division Multiplexing Elastic Optical Network: Crosstalk-Aware and Fragmentation-Aware
TL;DR: Two energy-efficient heuristics are proposed to address the issues of inter-core crosstalk, and fragmentation within the core respectively- to ensure quality transmission of the optical signal for dynamic traffic in space division multiplexing elastic optical network (SDM-EON), while maintaining survivability of the network against single link failure.
Proceedings ArticleDOI
On QoS-assured degraded provisioning in service-differentiated multi-layer elastic optical networks
Zhizhen Zhong,Jipu Li,Nan Hua,Gustavo B. Figueiredo,Yanhe Li,Xiaoping Zheng,Biswanath Mukherjee +6 more
TL;DR: Numerical results verify that the novel problem of online degraded provisioning in service-differentiated multi-layer networks with optical elasticity can achieve significant blocking reduction, and indicate that degradation in optical layer can increase the network capacity, while degradation in electric layer provides flexible time-bandwidth exchange.
Journal ArticleDOI
Explore Maximal Potential Capacity of WDM Optical Networks Using Time Domain Hybrid Modulation Technique
TL;DR: The TDHM technique is applied to the optical network to maximize its transmission capacity and it is shown that compared to the design with discrete modulation formats, the TDHM-based approach can significantly increase the network transmission capacity.
References
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Book
Optical Network Design and Planning
TL;DR: In this article, the authors focus on how best to perform bundling and protection in the presence of optical-bypass technology in real network environments, and provide guidelines as to when and how optical bypass technology should be deployed.
Journal ArticleDOI
On the Design of Energy-Efficient Mixed-Line-Rate (MLR) Optical Networks
TL;DR: This study presents mathematical models that can act as references for designing energy- and cost-efficient MLR optical networks and performs a comparative study of the energy efficiency of MLR and special cases ofMLR design, named as single-line-rate networks.
Journal ArticleDOI
Network Design and Architectures for Highly Dynamic Next-Generation IP-Over-Optical Long Distance Networks
Angela Chiu,Gagan L. Choudhury,G. Clapp,Robert Doverspike,J.W. Gannett,John G. Klincewicz,Guangzhi Li,Ronald A. Skoog,J. Strand,A. Von Lehmen,Dahai Xu +10 more
TL;DR: The DARPA CORONET project seeks to develop the target network architectures and technologies needed to build next-generation long-distance IP-over-Optical-Layer (IP/OL) networks as mentioned in this paper.
Proceedings ArticleDOI
Network design and architectures for highly dynamic next-generation IP-over-optical long distance networks
Angela Chiu,Gagan L. Choudhury,G. Clapp,Robert Doverspike,J.W. Gannett,John G. Klincewicz,Guangzhi Li,Ronald A. Skoog,J. Strand,A. Von Lehmen,Dahai Xu +10 more
TL;DR: In this article, the authors present initial network architectures and capacity-efficient design for an IP/Optical network with highly dynamic IP and wavelength services, restoration against up to 3 failures, and aggregate traffic levels that represent a 10-fold increase over today's network traffic.
Journal ArticleDOI
Optical network design with mixed line rates
Avishek Nag,Massimo Tornatore +1 more
TL;DR: This study proposes a novel, cost-effective approach to design a mixed-line-rate (MLR) network with transmission-range (TR) constraint, and shows that, with mixed line rates and maximum transmission range constraints, one can design a cost- effective network.