Peter Zinterhof

SOA as an Effective Tool for the Flexible Management of Increased Service Heterogeneity in Converged Enterprise Networks

Traditional service management techniques and frameworks are inadequate to handle new generation integrated applications and cross-enterprise business processes and services. Thus, there emerges a call for a management architecture that can provide the real-time visibility and control from the application and data level through the dynamic service and business process. The service delivery platform (SDP), a telco-version of SOA, is proper, but still not obvious. There is no standard definition for the term or the components that constitute an SDP. In this paper we intend to identify current boundaries of SDP as well as the importance of the concept. We classify and analyze the components and relations between the elements of this management framework. We visualize the results of our analysis through the reference architecture. And, in our representation of the service management framework we provide a rational view of the whole service delivery environment.

Uniform distribution, discrepancy, and reproducing kernel Hilbert spaces

Abstract In this paper we define a notion of uniform distribution and discrepancy of sequences in an abstract set E through reproducing kernel Hilbert spaces of functions on E. In the case of the finite-dimensional unit cube these discrepancies are very closely related to the worst case error obtained for numerical integration of functions in a reproducing kernel Hilbert space. In the compact case we show that the discrepancy tends to zero if and only if the sequence is uniformly distributed in our sense. Next we prove an existence theorem for such uniformly distributed sequences and investigate the relation to the classical notion of uniform distribution. Some examples conclude this paper.

An analytical approach to the efficient real-time events/services handling in converged network environment

Converged network seamlessly integrates different communications media such as data, voice and multimedia on a single platform. It refers to convergence both types of network and technologies as well as convergence between the different layers of network architecture. In this paper, we examine a priority-based queuing model and perform the mathematical analysis of different media calls processing in converged network environment. We use for this purpose a queuing system model M3/G3/1/NPRP in order to process effectively input jobs/requests (or packets). Tasks within this queuing system get a higher priority if they are handling a real-time event. We present in our paper mathematical results of the expected response and waiting time, and build hypothetical diagrams for the further practical usage in real-time system. A modeling method developed in this paper will be used for the fast configuration and testing of new converged network applications and services.

Conceptual framework for services creation/development environment in telecom domain

The telecom service providers (fixed and mobile) understand that they must bring in new smart services in order to attract new customers, retain existing ones and increase revenue. The challenges and goals for doing so are as follows: determining which services are needed; introducing more services in a faster manner and at lower costs; delivering innovative services in a way that allows existing users to migrate smoothly to new ones. These goals could not be achieved with traditional closed and proprietary network infrastructure, as the vendor lock-in involved in that infrastructure results in limited scope of services, and dependency on old business models. New services require a much greater degree of system flexibility, performance and scalability, as well as open standards. Next Generation Network (NGN) provide the means for enabling agile service creation capabilities that facilitate better user experiences by integrating both new and legacy services across any access. However, NGNs involve complex structures even for simple services as they consist of a large number of building blocks and necessitate hierarchical models with a lot of parallel subsystems. Thus, particular attention has to be paid to understanding and modelling the performance of these systems. The rationale of this paper lies in developing a design and engineering methodology (based on a mathematical foundation) that addresses the service creation aspects for those fields in which traditional approaches will not work for NGNs.

A fast structure-adaptive evaluation of local features in images

Abstract An image model for structure-adaptive evaluation or a feature of a pixel value in images is introduced using notions of a structuring element and structuring regions. Based on this model a fast and adaptive procedure for edge-preserving smoothing and change detection in images has been developed. For the problem of noise filtering and edge detection it cleans out the noise and at the same time does not blur the edges. To evaluate one pixel value the computational complexity of the fast algorithm is reduced to O ( L 2 ) per pixel, compared with the direct implementation complexity O ( L 4 ), where L × L is the window size for feature evaluation.

Performance Analysis and Derived Parallelization Strategy for a SCF Program at the Hartree Fock Level

General performance measurement tools, as provided on a SGI-Power Challenge/R10000 (194 MHz) running IRIX 6.2, which are the shell-commands perfex -a a.out and ssrun -[pcsampl, ideal, usertime] a.out, have been used for profiling a new SCF-program based on the Hartree Fock theory. The main cpu-time-consuming subroutine was detected and a parallel version with PVM 3.3 at a host-node model has been deduced. Speed-up parameters are presented and discussed.

A scenario of voice services delivery over enterprise W/LAN networked platform

The converged communication applications unlock business value. The value grows with the convergence extension into new areas. These applications increase the speed and agility of the enterprises, managements ability to control operations. Moreover, they handle seamlessly voice, data, and multimedia across multiple wireline and wireless access technologies. Also, enterprises are now considering how to extend their networks by IP voice over WLANs. This process starts with an analysis of a network infrastructure, services and applications, including the potential for converged services, as well as the technology for the transition to future services. In this paper, we examine a network architecture that spans WLAN and LAN to facilitate a seamless delivery of voice services across an enterprise. We build service scenario framework for this architecture. And, we propose a mathematical model of the delivery framework in order to analyze network behavior as a response to the new services introducing.

New-Emerging Service-Support Model for Converged Multi-Service Network and Its Practical Validation

Modern incorporated communications, converging voice, data, and multimedia onto a single network platform, is a technology that has received increasing attention through the past several years. A considerable time and analysis is dedicated to the evaluation of a range of IP communication systems before the assigning to a major purchase. However, relatively little attention is paid to the post-deployment issues, e.g. ongoing service support. New technology basically requires a new support model. The purpose of this paper is to examine the new service support model emerging for converged communications applications, define features and functionalities, and discuss an example of a support excellence. As a next step, we examine and evaluate here an analytical model extracted from queuing theory, namely M/G/1, for the possible implementation into multi-service converged network architecture in order to process effectively heterogeneous calls

Variated Availability Approach to the Services Manageable Delivering

By continuous increase of communication solutions usage, network operators must ensure their networks are capable of delivering high quality, innovative services quickly and cost-effectively. Besides, hardware and software vendors face different challenges including increased complexity, tight schedules, shrinking budgets and evolving standards. The open still developing standards, allow abstracting the service availability middleware from other components in the platform. In turn, the service availability is becoming fundamental metric in evaluating components for network-centric applications. Thus, in this paper, we analyze first a service availability notion from different viewpoints, its role as well as an impact onto the different applications performance. And then, we propose and develop a model for the performance of the mathematical analysis of the service availability in heterogeneous network environment. We also present in our paper theoretical results of the expected response and waiting time and build the abstract diagrams for further practical usage.

Enterprise network maintaining mobility – architectural model of services delivery

Purpose – Global commerce demands flexibility in when and how work gets done, as modern businesses increasingly require real‐time responses to partners and customers. With low costs, companies look to mobility as a way to speed responsiveness and increase the personalization of customer service offerings. Mobility is a key element of networking allowing enterprises to unlock their business process from fixed points. A unified approach to enterprise mobility delivers integrated wired/wireless networking, mobile extensions to unified communications, geographic, and end‐point independent network access and location services as major architectural components. As a consequence, this paper aims to focus on a converged architecture that spans wired and wireless networks to enable a seamless delivery of integrated services across the enterprise.Design/methodology/approach – This paper builds a framework to facilitate a continuous delivery of voice services. It also examines an architecture that traverses wireless...