Quality Models for Multimedia Delivery in a Services Oriented Architecture

Quality Models for Multimedia Delivery in a Services Oriented Architecture

Krishna Ratakonda (IBM T. J. Watson Research Center, USA)
Copyright: © 2009 |Pages: 26
DOI: 10.4018/978-1-60566-042-4.ch003
OnDemand PDF Download:
$37.50

Abstract

In this chapter we present an overview of research and development efforts across several different technical communities aimed at enabling efficient and standardized end-to-end delivery of multimedia content over a service-oriented architecture (SOA). We focus primarily on issues related to quality of service (QoS) specification, measurement, and enforcement for different multimedia distribution applications in this space.
Chapter Preview
Top

Introduction

In this chapter we present an overview of research and development efforts across several different technical communities aimed at enabling efficient and standardized end-to-end delivery of multimedia content over a service oriented architecture (SOA). We focus primarily on issues related to quality of service (QoS) specification, measurement, and enforcement for different multimedia distribution applications in this space. In order to do this, we first describe state-of-the-art in multimedia delivery architectures, and standardization efforts in coding, networking, and multimedia quality modeling. We then consider the implications of building SOA-based realizations of such multimedia applications, and identify the appropriate integrated service policies, mechanisms, architecture, and metrics that may be used to successfully design and deploy them. We not only describe the current state-of-the-art in this space, but also identify emerging trends, describe problems, discuss solutions, and most importantly, provide insights into the feasibility and applicability of these solutions to specific problem areas.

With the current availability of digital content, and underlying infrastructure improvements in network bandwidth and user devices, there is a rapidly expanding set of applications that require delivering multimedia to remote users. This includes traditional applications such as videoconferencing and video on demand, as well as several new applications enabled by enterprises, and the peer-to-peer (P2P) and gaming environments. Multimedia delivery requires orchestration across several different aspects, such as content generation, underlying infrastructure, end-user device capability, user preferences, service provider capabilities, and so forth. There is need for a standardized set of mechanisms that allow these distributed and heterogeneous components to successfully interact with each other to build an end-to-end multimedia delivery system.

A service-oriented architecture provides several mechanisms for describing precisely the capabilities of distributed components, providing directory services to locate appropriate service providers, and providing interface descriptors that allow connecting such components to compose workflows. It also provides policy mechanisms to support service level agreements (SLA), and specifies requirements on the desired QoS. Hence, there has been significant interest in using SOA-based architectures to deliver multimedia for several of these applications.

This is significantly different from the way several multimedia applications are currently constructed, as it requires traditional multimedia researchers to acknowledge the presence of a distributed infrastructure where the delivery mechanism is not under the control of any single provider. For example, a typical situation will have different providers providing content, infrastructure hosting, and end-user services. The situation is further complicated by the fact that a content provider would like to work with multiple end-user services providers. A key challenge that needs to be addressed in this space involves the development of appropriate models of end-to-end QoS for multimedia delivery. Such models are critical prerequisites for the successful deployment of any multimedia delivery application within the SOA framework. For instance, models for QoS are essential for users and service providers to be able to formulate the right SLAs and being able to enforce them. This also requires changing several of the established paradigms in prioritizing and delivering multimedia services over a tightly controlled network infrastructure. Capability negotiation, dynamic load balancing, security, privacy, and robustness of the heterogeneous environment are all very important considerations.

Traditional research in this field has often been from two distinct perspectives: the SOA side and the multimedia side. Researchers in SOA often use very simplistic QoS models for multimedia, and often ignore critical metrics relevant to the quality of the multimedia experience (e.g., user preferences, content characteristics, encoding, artifacts, etc.). On the other hand, multimedia researchers have built sophisticated models to measure multimedia quality and perform network bandwidth optimization; however, they have lacked a good mechanism to specify or enforce delivery policies that typically cover a broad spectrum of systems components. In this chapter, we bring together the established and emerging developments across both these fields, and connect these to QoS specification, measurement, and enforcement for different multimedia applications.

Complete Chapter List

Search this Book:
Reset
Table of Contents
Foreword
Torbjørn Skramstad
Preface
Khaled M. Khan
Acknowledgment
Khaled M. Khan
Chapter 1
Ghita Kouadri Mostefaoui
The ultimate effectiveness in terms of quality achievements should be a key concern of systems built from Web services. To this end, in this chapter... Sample PDF
The Development, Testing, and Deployment of a Web Services Infrastructure for Distributed Healthcare Delivery, Research, and Training
$37.50
Chapter 2
Abdelghani Benharref, Mohamed Adel Serhani, Mohamed Salem, Rachida Dssouli
Web services are a new breed of applications that endorse large support from main vendors from industry as well as academia. As the Web services... Sample PDF
Multi-Tier Framework for Management of Web Services' Quality
$37.50
Chapter 3
Krishna Ratakonda
In this chapter we present an overview of research and development efforts across several different technical communities aimed at enabling... Sample PDF
Quality Models for Multimedia Delivery in a Services Oriented Architecture
$37.50
Chapter 4
Julio Fernández Vilas
Several open issues in Web services architecture are being solved by using different kinds of solutions. Standard high-availability techniques based... Sample PDF
Virtual Web Services: Extension Architecture to Alleviate Open Problems in Web Services Technology
$37.50
Chapter 5
Witold Abramowicz
The following chapter focuses on the problem of the proper definition of non-functional properties and methods that may be applied in order to... Sample PDF
Profiling of Web Services to Measure and Verify their Non-Functional Properties
$37.50
Chapter 6
Kyriakos Kritikos
As the Web service (WS) paradigm gains popularity for its promise to transform the way business is conducted, the number of deployed WSs grows with... Sample PDF
Enhancing the Web Service Description and Discovery Processes with QoS
$37.50
Chapter 7
Michael C. Jaeger, Matthias Werner
This chapter presents the definition of relevant terminology and a conceptual model of the basic terms. The chapter starts with the presentation of... Sample PDF
Web Services Dependability
$37.50
Chapter 8
Frederic Montagut, Refik Molva, Silvan Tecumseh Golega
Composite applications leveraging the functionalities offered by Web services are today the underpinnings of enterprise computing. However, current... Sample PDF
Transactional Composite Applications
$37.50
Chapter 9
Enrico Pontelli, Tran Cao Son, Chitta Baral
This chapter presents a comprehensive logic programming framework designed to support intelligent composition of Web services. The underlying model... Sample PDF
A Logic Programming Based Framework for Intelligent Web Service Composition
$37.50
Chapter 10
Daniel Brenner, Barbara Paech, Matthias Merdes, Rainer Malaka
For the foreseeable future, testing will remain the mainstay of software quality assurance and measurement in all areas of software development... Sample PDF
Enhancing the Testability of Web Services
$37.50
Chapter 11
Ghita Kouadri Mostefaoui, Zakaria Maamar, Nanjangud C. Narendra
This chapter presents our research initiative known as aspect-oriented framework for Web services (AoF4WS). This initiative looks into the role of... Sample PDF
Aspect-Oriented Framework for Web Services (AoF4WS): Introduction and Two Example Case Studies
$37.50
Chapter 12
Ty Mey Eap, Marek Hatala, Dragan Gaševic, Nima Kaviani, Ratko Spasojevic
The lack of intrinsic and user control in the identity management of today Internet security hampers the research in the area of Semantic Web and... Sample PDF
Open Security Framework for Unleashing Semantic Web Services
$37.50
Chapter 13
Vishal Dwivedi
This chapter underlines the importance of security service level agreements (SLAs) for Web services. As Web services are increasingly incorporated... Sample PDF
Providing Web Services Security SLA Guarantees: Issues and Approaches
$37.50
Chapter 14
Fatih Oguz
This chapter describes a research study with an objective to explore and describe decision factors related to technology adoption. The study... Sample PDF
Adoption of Web Services in Digital Libraries: An Exploratory Study
$37.50
Chapter 15
Bijoy Majumdar
Change is the only constant, and this concept holds good for services too. Service maintenance is the most tedious and longest phase of service... Sample PDF
Service Evolution and Maintainability
$37.50
Chapter 16
Pauline Ratnasingam
This chapter aims to examine the extent of Web services usage and quality, applying the balanced scorecard methodology in a small business firm as... Sample PDF
The Role of Web Services: A Balance Scorecard Perspective
$37.50
About the Contributors