1,720,996 research outputs found
Modeling and Management of Service Level Agreements for Digital Video Broadcasting(DVB) Services
No full textThis paper describes a metamodeling strategy of Service Level Agreements for Digital Video Broadcasting services based on the Service Level Agreement Language(SLAng). The purpose of the paper is to provide a detailed analysis os SLAs in this domain and provide a motivation for modeling and automating their management. We also discuss why precise and machine readable SLAs can improve the level of automation in SLA management thereby reducing potential violations. The metamodeling approach based on a Model driven Architecture(MDA) described in this paper also simplifies the integration of a SLA Management system with other infrastructure that delivers the service to the client
The OpenOSS Project - An open Source operations Support Lab for the Telecommunications Industry.
No full textThis paper discusses the aims, objectives and early deliverables from the OpenOSS project which has been set up with the sponsorship of a number of Telecommunications Service Providers to investigate thepotential value of open source as an enabler for rapid innovation within the telecommunications industry. This paper also reports on the success of an initial proof of concept of OpenOSS which was pubically demonstrated t the telecommunications industry in Nice at the 2005 Telemanagement World Conference. We consider the practical business and technical benefits and challenges of using open source development in this way and report on our plans to take the project to the next stage of development
Accelerating CMOS Device Model Evaluation Using Multi-FPGA Systems
No full textRecently, FPGAs have been integrated into HPC clusters in order to boost their computational performance while reducing the power consumption significantly. EDA tools and algorithms are example applications which are demanding more computational power due to the current increase in complexity of analogue and mixed-signal chips. This made transistor-level simulation a growing bottleneck in the integrated circuit development process. This paper discusses the design and implementation of an FPGA-based reconfigurable system to accelerate the SPICE CMOS LEVEL 3 model device evaluation. The preliminary results showed that the system demonstrated an average speed improvement of up to 12x faster than a software implementation running on an Intel 2.0 GHz based workstation. This result is based on a single FPGA implementation. The paper also outlines the design of the multi-FPGA system to accelerate the CMOS model. The proposed system can be attached as a high speed co-processor to boost the SPICE simulation performance
Using open source to realise an NGOSS proof of concept
Full text linkThis paper discusses the aims, objectives and early deliverables from the OpenOSS project which has been set up with the sponsorship of a number of Telecommunications Service Providers to investigate the potential value of open source as an enabler for rapid innovation within the telecommunications industry. We then discuss how the OpenOSS toolbox is being applied to help in the specification of the next generation network management solutions for Digital TV networks
Tracking Manoeuvring Mobile Nodes in Wireless Sensor Networks
No full textThis paper addresses the problem of tracking mobile nodes in Wireless Sensor Networks (WSN). Our approach is based on a tracking with range-only measurements scheme, intended for implementation in WSN. The developed tracking system is designed for continuous estimation of the target’s trajectory and two-axes velocity. A network of “anchor” wireless nodes is considered to be deployed at a specific region of interest. The anchor nodes collect data that correspond to the range between the anchors and the target. A multiple-modal Particle Filter (PF) algorithm is design to process the ranging observations and produce an estimation of the target’s kinematic variables in real-time. The reason for employing multiple models to represent the target’s motion pattern, stems from the need to effectively track manoeuvring targets. Manoeuvring targets require more complex modeling which adequately represents the sudden changes of the position and velocity vectors. Simulations are provided to assess the performance of the proposed framework, considering realworld conditions. The proposed multiple model approach is evaluated on manoeuvring targets with constant as well as variable turning rate. Finally, this investigation reveals that the system’s accuracy depends upon two important system parameters, the sampling period and the number of generated particles in the PF algorithm. The effect of these parameters is analyzed and amendments are proposed
- …
