Andrzej Sikora

Control system for reducing energy consumption in backbone computer network

SUMMARY Network optimization concerned with operational traffic management in existing data networks is typically oriented towards either maximizing throughput in congested networks while providing for adequate transmission quality, or towards balancing the traffic so as to maintain possibly large free capacity for carrying additional (new) traffic. Nowadays, the reduction of power consumption is a new key aspect in the development of modern wired networks. Power management capabilities allow modulating the energy consumption of devices that form a network by putting them into standby state, or by decreasing their performance in case of low incoming traffic volume. This paper presents a framework for backbone network management, which leads to the minimization of the energy used by this network. The policy for dynamic power management of the whole network through energy-aware routing, traffic engineering, and network equipment activity control is introduced and discussed. The concept of the system is to achieve the desired trade-off between total power consumption and the network performance according to the current load, incoming traffic, and user requirements. The effectiveness of our framework is illustrated by means of a numerical study. Copyright

Control system for reducing energy consumption in backbone computer network: CONTROL SYSTEM FOR REDUCING ENERGY CONSUMPTION IN BACKBONE NETWORK

Network optimization concerned with operational traffic management in existing data networks is typically oriented towards either maximizing throughput in congested networks while providing for adequate transmission quality, or towards balancing the traffic so as to maintain possibly large free capacity for carrying additional (new) traffic. Nowadays, the reduction of power consumption is a new key aspect in the development of modern wired networks. Power management capabilities allow modulating the energy consumption of devices that form a network by putting them into standby state, or by decreasing their performance in case of low incoming traffic volume. This paper presents a framework for backbone network management, which leads to the minimization of the energy used by this network. The policy for dynamic power management of the whole network through energy‐aware routing, traffic engineering, and network equipment activity control is introduced and discussed. The concept of the system is to achieve the desired trade‐off between total power consumption and the network performance according to the current load, incoming traffic, and user requirements. The effectiveness of our framework is illustrated by means of a numerical study. Copyright

Modeling Mobility in Cooperative Ad Hoc Networks

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Simulation-based design of self-organising and cooperative networks

Modelling and simulation is a critical element in the design, development and evaluation of self-organising and cooperative networks. In this paper, we investigate issues concerning wireless sensor networks and mobile ad hoc networks design based on simulation. We survey approaches to wireless transmission and nodes mobility modelling, and describe a novel algorithm for calculating a collision-free motion trajectory for a mobile device in unknown environment. Finally, we describe the design, performance and potential applications of our software platform for parallel and distributed simulation, and computer-aided design of self-organising networks.

A Federated Approach to Parallel and Distributed Simulation of Complex Systems

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Algorithms for distributed simulation - comparative study

Distributed discrete-event simulation is proposed as ail alternative to traditional sequential simulation. The paper discusses some important issues associated with the implementation of parallel and distributed simulation. The topics that are covered are classical and new synchronization protocols. The effectiveness of different algorithms for asynchronous simulation is discussed based on the numerical tests results.

A software tool for federated simulation of wireless sensor networks and mobile ad hoc networks

The applicability of parallel discrete event simulation to design and evaluation of ad hoc networks is discussed. In this paper we describe the design, functionality, implementation and performance of our software system named MobASim. It is a Java-based integrated framework for wireless sensor and mobile ad hoc networks simulation performed on parallel computers and computer clusters that utilizes the paradigm of federating simulators and asynchronous distributed simulation technology. The computational results presented in the final part of the paper show the efficiency of parallel simulation performed upon MobASim and the application of our tool to design self-organizing communication network.

On formulation of a network energy saving optimization problem

Possible formulations of mathematical programing problem concerning energy aware network are presented. Two main possibilities of reducing problem complexity are analysed: allocation of predefined paths and reformulation of task using continuous variables. Properties of both methods are analysed and hybrid formulation is proposed. Comparison of complexity is provided.

Control Framework For High Performance Energy Aware Backbone Network.

Global optimization of the energy consumption in heterogeneous environments has been recently an important research issue in wired and wireless networks. This paper presents a general framework for flexible and cognitive backbone network management which leads to the minimization of the energy utilized by the network. The policy for activity control of all the modules and elements that form a network is introduced and discussed. The idea of the system is to achieve the desired trade-off between energy consumption and network performance according to the traffic load.

A Movement-Assisted Deployment of Collaborating Autonomous Sensors for Indoor and Outdoor Environment Monitoring

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