The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Biswanath Mukherjee - One of the best experts on this subject based on the ideXlab platform.
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Exploiting Excess Capacity for Survivable Traffic Grooming in Optical WDM Backbone Networks
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011Co-Authors: Ferhat Dikbiyik, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity (EC) to avoid early exhaustion of resources. We propose to exploit the EC in optical WDM backbone networks to support efficient and survivable traffic grooming where connection requests are of sub-wavelength granularity and each provisioned request has to be protected from a single link failure. Our novel EC management techniques can improve network performance, at no additional cost to the operator, since Excess Capacity is normally unutilized. Our techniques exploit EC such that a connection can use a protection scheme which provides high reliability but may consume more resources when traffic is low, but it switches to another protection scheme which provides lower reliability but is resource efficient by reprovisioning backup resources. As a complement, we propose hold-p-lightpath scheme to exploit EC by preventing the termination of pre-established (but unused) resources. The backup reprovisioning problem is split it into three subproblems: when, how, and what to reprovision; and we propose our solutions for each subproblem. For the what to reprovision subproblem, we design three methods with different reliability and resource-efficiency performance. We compare our approaches with traditional protection schemes for typical daily fluctuating traffic, and show that significant improvements in performance and cost can be achieved.
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management of Excess Capacity for path oriented differentiated services optical networks
Integrated Photonics Research Silicon and Nanophotonics and Photonics in Switching (2010) paper PTuD4, 2010Co-Authors: Ferhat Dikbiyik, Biswanath Mukherjee, Massimo Tornatore, L SahasrabuddheAbstract:A path-oriented differentiated services optical network has demands which require different types of expectations from the network. Exploiting Excess Capacity which the network already has to meet these different expectations is investigated.
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Exploiting Excess Capacity for improved robustness in optical WDM backbone mesh networks
2010 Conference on Optical Fiber Communication (OFC NFOEC) collocated National Fiber Optic Engineers Conference, 2010Co-Authors: Ferhat Dikbiyik, Laxman Sahasrabuddhe, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity to accommodate new traffic demands and avoid early exhaustion of bandwidth resources. Exploiting this unused Capacity to improve robustness of an optical WDM backbone mesh network is investigated.
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Efficient Management of a Telecom Networks Excess Capacity: A Traffic-Engineering Approach
33rd European Conference and Exhibition of Optical Communication, 2007Co-Authors: Marwan Batayneh, Suman Sarkar, Biswanath MukherjeeAbstract:We utilize a telecom networks Excess Capacity to improve its Quality-of-Service. Our Excess Capacity Management Scheme (ECMS) significantly improves connection availabilities and utilization of network Capacity when applied to an optical backbone mesh network.
Ferhat Dikbiyik - One of the best experts on this subject based on the ideXlab platform.
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Exploiting Excess Capacity for Survivable Traffic Grooming in Optical WDM Backbone Networks
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011Co-Authors: Ferhat Dikbiyik, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity (EC) to avoid early exhaustion of resources. We propose to exploit the EC in optical WDM backbone networks to support efficient and survivable traffic grooming where connection requests are of sub-wavelength granularity and each provisioned request has to be protected from a single link failure. Our novel EC management techniques can improve network performance, at no additional cost to the operator, since Excess Capacity is normally unutilized. Our techniques exploit EC such that a connection can use a protection scheme which provides high reliability but may consume more resources when traffic is low, but it switches to another protection scheme which provides lower reliability but is resource efficient by reprovisioning backup resources. As a complement, we propose hold-p-lightpath scheme to exploit EC by preventing the termination of pre-established (but unused) resources. The backup reprovisioning problem is split it into three subproblems: when, how, and what to reprovision; and we propose our solutions for each subproblem. For the what to reprovision subproblem, we design three methods with different reliability and resource-efficiency performance. We compare our approaches with traditional protection schemes for typical daily fluctuating traffic, and show that significant improvements in performance and cost can be achieved.
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management of Excess Capacity for path oriented differentiated services optical networks
Integrated Photonics Research Silicon and Nanophotonics and Photonics in Switching (2010) paper PTuD4, 2010Co-Authors: Ferhat Dikbiyik, Biswanath Mukherjee, Massimo Tornatore, L SahasrabuddheAbstract:A path-oriented differentiated services optical network has demands which require different types of expectations from the network. Exploiting Excess Capacity which the network already has to meet these different expectations is investigated.
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Exploiting Excess Capacity for improved robustness in optical WDM backbone mesh networks
2010 Conference on Optical Fiber Communication (OFC NFOEC) collocated National Fiber Optic Engineers Conference, 2010Co-Authors: Ferhat Dikbiyik, Laxman Sahasrabuddhe, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity to accommodate new traffic demands and avoid early exhaustion of bandwidth resources. Exploiting this unused Capacity to improve robustness of an optical WDM backbone mesh network is investigated.
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Excess-Capacity-aware, shared-path protection with backup reprovisioning in telecom mesh networks
2010 IEEE 4th International Symposium on Advanced Networks and Telecommunication Systems, 2010Co-Authors: Ferhat Dikbiyik, Laxman Sahasrabuddhe, Massimo TornatoreAbstract:Any operational telecom network usually has some spare Capacity, called Excess Capacity (EC), at a given time to accommodate traffic variations and avoid exhaustion of networks resources. We investigate a novel shared-path protection approach that exploits the Excess Capacity and backup reprovisioning to improve the network's performance.
Aadhaar Chaturvedi - One of the best experts on this subject based on the ideXlab platform.
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safety stock Excess Capacity or diversification trade offs under supply and demand uncertainty
Production and Operations Management, 2016Co-Authors: Aadhaar Chaturvedi, Victor MartinezdealbenizAbstract:type="main" xml:id="poms12406-abs-0001"> Firms mitigate uncertainty in demand and supply by carrying safety stock, planning for Excess Capacity and diversifying supply sources. In this study, we provide a framework to jointly optimize these three levers in a periodic review infinite horizon setting, and in particular we examine how one can reduce inventory and Capacity investments through proper diversification strategies. Observing that a modified base-stock inventory policy is optimal, we find that the Capacity-diversification problem is well behaved and characterize the optimal mix of safety stock, Excess Capacity and extra number of supply sources. We find that higher supply uncertainty results in higher safety stock, more Excess Capacity, and higher diversification. But safety stock and diversification are non-monotonic in demand uncertainty. Our results can be extended to situations in which suppliers are heterogeneous, and can be used to develop effective heuristics.
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Safety Stock, Excess Capacity or Diversification: Trade‐Offs under Supply and Demand Uncertainty
Production and Operations Management, 2015Co-Authors: Aadhaar Chaturvedi, Victor Martínez-de-albénizAbstract:type="main" xml:id="poms12406-abs-0001"> Firms mitigate uncertainty in demand and supply by carrying safety stock, planning for Excess Capacity and diversifying supply sources. In this study, we provide a framework to jointly optimize these three levers in a periodic review infinite horizon setting, and in particular we examine how one can reduce inventory and Capacity investments through proper diversification strategies. Observing that a modified base-stock inventory policy is optimal, we find that the Capacity-diversification problem is well behaved and characterize the optimal mix of safety stock, Excess Capacity and extra number of supply sources. We find that higher supply uncertainty results in higher safety stock, more Excess Capacity, and higher diversification. But safety stock and diversification are non-monotonic in demand uncertainty. Our results can be extended to situations in which suppliers are heterogeneous, and can be used to develop effective heuristics.
Massimo Tornatore - One of the best experts on this subject based on the ideXlab platform.
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Exploiting Excess Capacity for Survivable Traffic Grooming in Optical WDM Backbone Networks
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011Co-Authors: Ferhat Dikbiyik, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity (EC) to avoid early exhaustion of resources. We propose to exploit the EC in optical WDM backbone networks to support efficient and survivable traffic grooming where connection requests are of sub-wavelength granularity and each provisioned request has to be protected from a single link failure. Our novel EC management techniques can improve network performance, at no additional cost to the operator, since Excess Capacity is normally unutilized. Our techniques exploit EC such that a connection can use a protection scheme which provides high reliability but may consume more resources when traffic is low, but it switches to another protection scheme which provides lower reliability but is resource efficient by reprovisioning backup resources. As a complement, we propose hold-p-lightpath scheme to exploit EC by preventing the termination of pre-established (but unused) resources. The backup reprovisioning problem is split it into three subproblems: when, how, and what to reprovision; and we propose our solutions for each subproblem. For the what to reprovision subproblem, we design three methods with different reliability and resource-efficiency performance. We compare our approaches with traditional protection schemes for typical daily fluctuating traffic, and show that significant improvements in performance and cost can be achieved.
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management of Excess Capacity for path oriented differentiated services optical networks
Integrated Photonics Research Silicon and Nanophotonics and Photonics in Switching (2010) paper PTuD4, 2010Co-Authors: Ferhat Dikbiyik, Biswanath Mukherjee, Massimo Tornatore, L SahasrabuddheAbstract:A path-oriented differentiated services optical network has demands which require different types of expectations from the network. Exploiting Excess Capacity which the network already has to meet these different expectations is investigated.
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Exploiting Excess Capacity for improved robustness in optical WDM backbone mesh networks
2010 Conference on Optical Fiber Communication (OFC NFOEC) collocated National Fiber Optic Engineers Conference, 2010Co-Authors: Ferhat Dikbiyik, Laxman Sahasrabuddhe, Massimo Tornatore, Biswanath MukherjeeAbstract:Any operational network has some Excess Capacity to accommodate new traffic demands and avoid early exhaustion of bandwidth resources. Exploiting this unused Capacity to improve robustness of an optical WDM backbone mesh network is investigated.
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Excess-Capacity-aware, shared-path protection with backup reprovisioning in telecom mesh networks
2010 IEEE 4th International Symposium on Advanced Networks and Telecommunication Systems, 2010Co-Authors: Ferhat Dikbiyik, Laxman Sahasrabuddhe, Massimo TornatoreAbstract:Any operational telecom network usually has some spare Capacity, called Excess Capacity (EC), at a given time to accommodate traffic variations and avoid exhaustion of networks resources. We investigate a novel shared-path protection approach that exploits the Excess Capacity and backup reprovisioning to improve the network's performance.
C W Madden - One of the best experts on this subject based on the ideXlab platform.
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Excess Capacity markets regulation and values
Health Services Research, 1999Co-Authors: C W MaddenAbstract:OBJECTIVE: To examine the conceptual bases for the conflicting views of Excess Capacity in healthcare markets and their application in the context of today's turbulent environment. STUDY SETTING: The policy and research literature of the past three decades. STUDY DESIGN: The theoretical perspectives of alternative economic schools of thought are used to support different policy positions with regard to Excess Capacity. Changes in these policy positions over time are linked to changes in the economic and political environment of the period. The social values implied by this history are articulated. DATA COLLECTION: Standard library search procedures are used to identify relevant literature. PRINCIPAL FINDINGS: Alternative policy views of Excess Capacity in healthcare markets rely on differing theoretical foundations. Changes in the context in which policy decisions are made over time affect the dominant theoretical framework and, therefore, the dominant policy view of Excess Capacity. CONCLUSIONS: In the 1990s, multiple perspectives of optimal Capacity still exist. However, our evolving history suggests a set of persistent values that should guide future policy in this area.
