2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
A well established principle in the theory of wireless ad hoc networks with randomly moving nodes... more A well established principle in the theory of wireless ad hoc networks with randomly moving nodes states that mobility increases the capacity of such networks at the expense of increased packet delivery delays. In this paper we explore the more practical problem of taking advantage of mobility to reduce source-destination path lengths (and therefore increase network throughput) in networks that can tolerate delays up to a certain finite value. We propose an optimal stopping rule policy to select the optimal time to transmit packets based on current shortest path length information and a stochastic model of the connectivity dynamics. Simulation results that illustrate the validity of this approach are presented and the dependence of the performance gain on the network parameters is analyzed.
15th International Conference on Optical Network Design and Modeling - ONDM 2011, 2011
Energy efficiency is becoming an increasingly important factor to consider in day-to-day operatio... more Energy efficiency is becoming an increasingly important factor to consider in day-to-day operations, and the Information, Communication and Technology (ICT) arena is no exception. The energy consumption in the ICT sector is increasing at a rate that deems energy consumption a possible limitation to the continuous fast growth of the future Internet. We address this limitation in two ways. (1) We propose a service oriented energy efficient Internet architecture. This architecture exploits the advantages of the unified provisioning of optical network and IT resources provided by the service plane architecture. It introduces an energy-aware analytical model and algorithms that cooperatively optimise the selection and scheduling of resources such that the overall power consumption by both the network and IT resources is minimised. (2) We propose a new infrastructure scenario which introduces integrated “OXC-IT” resource nodes in addition to the separate IT resource sites at the network e...
2011 13th International Conference on Transparent Optical Networks, 2011
ABSTRACT The growing demand for network and IT resources by distributed future Internet applicati... more ABSTRACT The growing demand for network and IT resources by distributed future Internet applications has lead to excessive power consumption. Energy consumption in the future Internet has become a significant consideration in determining the long-term sustainability of the Internet in terms of energy cost but also from environmental perspective. This issue can be address by proposing new energy efficient Infrastructures. However, this process can be costly and time consuming. In this paper, we focus on energy efficient provisioning strategies for IT resources interconnected via the optical wavelength-division multiplexing (WDM) networks. We propose and present an energy-aware service oriented framework that implements an energy-efficient resource orchestration scheme. This scheme jointly considers optical network and IT energy-related parameters to minimize the total operational power in networked-IT environments.
ABSTRACT The future Internet evolution is driven by applications that require simultaneous real-t... more ABSTRACT The future Internet evolution is driven by applications that require simultaneous real-time access to multiple heterogeneous IT resources interconnected by high-speed optical networks. In this paper, we propose a novel service-oriented resource orchestration model based on the optimization of heterogeneous IT and network resources owned by different Infrastructure Providers (InPs). The proposed model aims to achieve a global optimum from both the end-users' and InPs' point of view across different administrative domains. An integer linear program (ILP) is formulated to obtain optimal results that maximizes the number of accepted requests while minimizing resource usage. It is compared against a co-scheduling ILP model, whose objective is to maximize the number of accepted requests only. Finally, we propose a heuristic solution for scalability. Its performance is compared against (i) our proposed ILP (ii) a co-scheduling heuristic that aim to maximize number of accepted requests only and (iii) an algorithm that does not take into account cross-domain optimizations.
A well established principle in the theory of wireless ad hoc networks with randomly moving nodes... more A well established principle in the theory of wireless ad hoc networks with randomly moving nodes states that mobility increases the capacity of such networks at the expense of increased packet delivery delays. In this paper we explore the more practical problem of taking advantage of mobility to reduce source-destination path lengths (and therefore increase network throughput) in networks that can tolerate delays up to a certain finite value. We propose an optimal stopping rule policy to select the optimal time to transmit packets based on current shortest path length information and a stochastic model of the connectivity dynamics. Simulation results that illustrate the validity of this approach are presented and the dependence of the performance gain on the network parameters is analyzed.
1. Introduction Many next-generation applications are characterised by the exchange of massive am... more 1. Introduction Many next-generation applications are characterised by the exchange of massive amounts of data, high levels of inter-activity, remote high definition visualisation, intensive distributed computations, and high capacity distributed storage. These highly dynamic, distributed, ...
Energy efficiency is becoming an increasingly important factor to consider in day-to-day operatio... more Energy efficiency is becoming an increasingly important factor to consider in day-to-day operations, and the Information, Communication and Technology (ICT) arena is no exception. The energy consumption in the ICT sector is increasing at a rate that deems energy consumption a possible limitation to the continuous fast growth of the future Internet. We address this limitation in two ways.(1) We propose a service oriented energy efficient Internet architecture. This architecture exploits the advantages of the unified provisioning ...
Abstract-The advent of new Internet applications and services has seen an increase in heterogenei... more Abstract-The advent of new Internet applications and services has seen an increase in heterogeneity and complexity in service provisioning. These services require high-end non-network (storage and computing) resources interconnected by high capacity optical network. To support ...
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
A well established principle in the theory of wireless ad hoc networks with randomly moving nodes... more A well established principle in the theory of wireless ad hoc networks with randomly moving nodes states that mobility increases the capacity of such networks at the expense of increased packet delivery delays. In this paper we explore the more practical problem of taking advantage of mobility to reduce source-destination path lengths (and therefore increase network throughput) in networks that can tolerate delays up to a certain finite value. We propose an optimal stopping rule policy to select the optimal time to transmit packets based on current shortest path length information and a stochastic model of the connectivity dynamics. Simulation results that illustrate the validity of this approach are presented and the dependence of the performance gain on the network parameters is analyzed.
15th International Conference on Optical Network Design and Modeling - ONDM 2011, 2011
Energy efficiency is becoming an increasingly important factor to consider in day-to-day operatio... more Energy efficiency is becoming an increasingly important factor to consider in day-to-day operations, and the Information, Communication and Technology (ICT) arena is no exception. The energy consumption in the ICT sector is increasing at a rate that deems energy consumption a possible limitation to the continuous fast growth of the future Internet. We address this limitation in two ways. (1) We propose a service oriented energy efficient Internet architecture. This architecture exploits the advantages of the unified provisioning of optical network and IT resources provided by the service plane architecture. It introduces an energy-aware analytical model and algorithms that cooperatively optimise the selection and scheduling of resources such that the overall power consumption by both the network and IT resources is minimised. (2) We propose a new infrastructure scenario which introduces integrated “OXC-IT” resource nodes in addition to the separate IT resource sites at the network e...
2011 13th International Conference on Transparent Optical Networks, 2011
ABSTRACT The growing demand for network and IT resources by distributed future Internet applicati... more ABSTRACT The growing demand for network and IT resources by distributed future Internet applications has lead to excessive power consumption. Energy consumption in the future Internet has become a significant consideration in determining the long-term sustainability of the Internet in terms of energy cost but also from environmental perspective. This issue can be address by proposing new energy efficient Infrastructures. However, this process can be costly and time consuming. In this paper, we focus on energy efficient provisioning strategies for IT resources interconnected via the optical wavelength-division multiplexing (WDM) networks. We propose and present an energy-aware service oriented framework that implements an energy-efficient resource orchestration scheme. This scheme jointly considers optical network and IT energy-related parameters to minimize the total operational power in networked-IT environments.
ABSTRACT The future Internet evolution is driven by applications that require simultaneous real-t... more ABSTRACT The future Internet evolution is driven by applications that require simultaneous real-time access to multiple heterogeneous IT resources interconnected by high-speed optical networks. In this paper, we propose a novel service-oriented resource orchestration model based on the optimization of heterogeneous IT and network resources owned by different Infrastructure Providers (InPs). The proposed model aims to achieve a global optimum from both the end-users' and InPs' point of view across different administrative domains. An integer linear program (ILP) is formulated to obtain optimal results that maximizes the number of accepted requests while minimizing resource usage. It is compared against a co-scheduling ILP model, whose objective is to maximize the number of accepted requests only. Finally, we propose a heuristic solution for scalability. Its performance is compared against (i) our proposed ILP (ii) a co-scheduling heuristic that aim to maximize number of accepted requests only and (iii) an algorithm that does not take into account cross-domain optimizations.
A well established principle in the theory of wireless ad hoc networks with randomly moving nodes... more A well established principle in the theory of wireless ad hoc networks with randomly moving nodes states that mobility increases the capacity of such networks at the expense of increased packet delivery delays. In this paper we explore the more practical problem of taking advantage of mobility to reduce source-destination path lengths (and therefore increase network throughput) in networks that can tolerate delays up to a certain finite value. We propose an optimal stopping rule policy to select the optimal time to transmit packets based on current shortest path length information and a stochastic model of the connectivity dynamics. Simulation results that illustrate the validity of this approach are presented and the dependence of the performance gain on the network parameters is analyzed.
1. Introduction Many next-generation applications are characterised by the exchange of massive am... more 1. Introduction Many next-generation applications are characterised by the exchange of massive amounts of data, high levels of inter-activity, remote high definition visualisation, intensive distributed computations, and high capacity distributed storage. These highly dynamic, distributed, ...
Energy efficiency is becoming an increasingly important factor to consider in day-to-day operatio... more Energy efficiency is becoming an increasingly important factor to consider in day-to-day operations, and the Information, Communication and Technology (ICT) arena is no exception. The energy consumption in the ICT sector is increasing at a rate that deems energy consumption a possible limitation to the continuous fast growth of the future Internet. We address this limitation in two ways.(1) We propose a service oriented energy efficient Internet architecture. This architecture exploits the advantages of the unified provisioning ...
Abstract-The advent of new Internet applications and services has seen an increase in heterogenei... more Abstract-The advent of new Internet applications and services has seen an increase in heterogeneity and complexity in service provisioning. These services require high-end non-network (storage and computing) resources interconnected by high capacity optical network. To support ...
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