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Service Infrastructure (service + infrastructure)

Distribution by Scientific Domains

Engineering	60%
Information Science and Computing	40%

Selected Abstracts

ShanghaiGrid: an Information Service Grid

CONCURRENCY AND COMPUTATION: PRACTICE & EXPERIENCE, Issue 1 2006
Minglu Li
Abstract The goal of the ShanghaiGrid is to provide information services to the people. It aims to construct a metropolitan-area information service infrastructure and establish an open standard for widespread upper-layer applications from both communities and the government. The Information Service Grid Toolkit and a typical application called the Traffic Information Grid are discussed in detail. Copyright © 2005 John Wiley & Sons, Ltd. [source]

A peer-to-peer IPTV service architecture for the IP multimedia subsystem

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 6-7 2010
A. Bikfalvi
Abstract During these last years the Internet Protocol Television (IPTV) service and the different peer-to-peer (P2P) technologies have generated an increasing interest for the developers and the research community that find in them the solution to deal with the scalability problem of media streaming and reducing costs at the same time. However, despite of the benefits obtained in Internet-based applications and the growing deployment of commercial IPTV systems, there has been a little effort in combining them both. With the advent of the next-generation-network platforms such as the IP Multimedia Subsystem (IMS), which advocates for an open and inter-operable service infrastructure, P2P emerges as a possible solution in situations where the traditional streaming mechanisms are not possible or not economically feasible. In this paper, we propose an IPTV service architecture for the IMS that combines a centralized control layer and a distributed, P2P-like, media layer that relies on the IMS devices or peers located in the customers' premises to act as streaming forwarding nodes. We extend the existing IMS IPTV standardization work that has already been done in 3GPP and ETSI TISPAN in order to require a minimum number of architectural changes. The objective is to obtain a system with a similar performance to the one in currently deployed systems and with the flexibility of P2P. One of the main challenges is to achieve comparable response times to user actions such as changing and tuning into channels, as well as providing a fast recovery mechanism when streaming nodes leave. To accomplish this we introduce the idea of foster peers as peers having inactive multimedia sessions and reserved resources. These peers are on stand-by until their functionality is required and at that moment, they are able to accept downstream peers at short notice for events requiring urgent treatment like channel changing and recovery. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Layered view of QoS issues in IP-based mobile wireless networks

INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS, Issue 2 2006
Haowei Bai
Abstract With the convergence of wireless communication and IP-based networking technologies, future IP-based wireless networks are expected to support real-time multimedia. IP services over wireless networks (e.g. wireless access to Internet) enhance the mobility and flexibility of traditional IP network users. Wireless networks extend the current IP service infrastructure to a mix of transmission media, bandwidth, costs, coverage, and service agreements, requiring enhancements to the IP protocol layers in wireless networks. Furthermore, QoS provisioning is required at various layers of the IP protocol stack to guarantee different types of service requests, giving rise to issues related to cross-layer design methodology. This paper reviews issues and prevailing solutions to performance enhancements and QoS provisioning for IP services over mobile wireless networks from a layered view. Copyright © 2006 John Wiley & Sons, Ltd. [source]

NGOSS-based convergent OSS framework toward business agility: KT case

INTERNATIONAL JOURNAL OF NETWORK MANAGEMENT, Issue 6 2006
Cheol-Seong Kim
Recently, most wireline telecom service providers have confronted a decrease of subscribers because wireless service providers are making inroads into traditional telecom markets and gaining tangible net earnings. To overcome a severely competitive business environment, wireline service providers strive to change their service infrastructure from a network-focused service to a value-added and customer-focused one that can create new value and markets. This also entails a paradigm shift in operations and management, and now most service providers are rushing to build a new converged OSS to efficiently accommodate the network and service evolution. KT has driven the NeOSS (New OSS) project to build a convergent OSS for the past 3 years. This paper presents three NGOSS-based architectural core principles that are the foundation of NeOSS, which are business process integration by using BPM technology, distributed application integration by using EAI technology, and building a consolidated inventory DB based on a standard information model. Lastly, we present KT's operational improvement through the use of NeOSS. Copyright © 2006 John Wiley & Sons, Ltd. [source]

A MARKET UTILITY-BASED MODEL FOR CAPACITY SCHEDULING IN MASS SERVICES

PRODUCTION AND OPERATIONS MANAGEMENT, Issue 2 2003
JOHN C. GOODALE
Only a small set of employee scheduling articles have considered an objective of profit or contribution maximization, as opposed to the traditional objective of cost (including opportunity costs) minimization. In this article, we present one such formulation that is a market utility-based model for planning and scheduling in mass services (MUMS). MUMS is a holistic approach to market-based service capacity scheduling. The MUMS framework provides the structure for modeling the consequences of aligning competitive priorities and service attributes with an element of the firm's service infrastructure. We developed a new linear programming formulation for the shift-scheduling problem that uses market share information generated by customer preferences for service attributes. The shift-scheduling formulation within the framework of MUMS provides a business-level model that predicts the economic impact of the employee schedule. We illustrated the shift-scheduling model with empirical data, and then compared its results with models using service standard and productivity standard approaches. The result of the empirical analysis provides further justification for the development of the market-based approach. Last, we discuss implications of this methodology for future research. [source]