Transport Protocols and QoS for Wireless Multimedia

Transport Protocols and QoS for Wireless Multimedia

Gürkan Gür (Satellite Networks Research Laboratory (SATLAB), Bogaziçi University, Turkey), Suzan Bayhan (Satellite Networks Research Laboratory (SATLAB), Bogaziçi University, Turkey) and Fatih Alagöz (Satellite Networks Research Laboratory (SATLAB), Bogaziçi University, Turkey)
DOI: 10.4018/978-1-59904-820-8.ch018
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Abstract

This chapter introduces the QoS issues and support in transport protocols for wireless multimedia transmission. After an overview of the transport layer functionalities in a transmission and the multimedia characteristics, conventional transport layer protocols: transmission control protocol (TCP), and user datagram protocol (UDP) are described. In this chapter, some of the proposed modifications to these protocols in order to improve multimedia transmission quality in wireless networks are also summarized. Particulary, UDP Lite, TCP friendly rate control protocol (TFRC), and real-time transport protocol (RTP)--real-time transport control protocol (RTCP) are mentioned. Finally, the chapter is concluded with some discussions on the current trends in transport protocols for wireless multimedia transmission and on some of the ongoing research issues.
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Introduction

Recently, there has been an unprecedented increase in the demand for wireless multimedia applications. However, the type of network access technologies has varied a lot. These network access technologies of the present and future are envisioned to range from body area networks to satellite wide area networks (WANs) as can be seen in Figure 1. These networks are being developed to transport high-speed multimedia content for streaming, interactive, peer-to-peer and content distribution services to network segments as well as to individual users. With the recent explosion of YouTubeTM and similar multimedia-based services, it has become more crucial to deliver multimedia services with an acceptable quality. These quality of service (QoS) demands for multimedia traffic are compounded in the case of a wireless network, where new problems arise due to the implied mobility of the users as well as due to the nature of the current IP protocols that support IP-based mobility, combined with a lossy and interrupt/outage-prone nature of the communications channel. Therefore, the traditional protocol stacks have to be re-engineered, by designing more flexible and generic communication protocols (Argyriou, 2005).

Figure 1.

Heterogeneous network access technologies

TCP (transmission control protocol) is the most commonly used protocol at the transport layer of the network stack in the all-IP networks, originally developed in wired networks with low bit error rate (BER) in the order of less than 10-8. In this context, any wireless network with Internet service needs to be compatible with the protocol used in the wired network (i.e., mainly the TCP/IP protocol). However, future wireless all-IP networks, while offering the promise of these exciting broadband applications, are expected to consist of several, potentially incompatible, wireless access technologies that would be offered by a number of competing service providers. The diversity of access technologies, however, may drastically affect the QoS for multimedia services.

Additional issues arise when considering the widely differing types of services that the user may use: streaming media, real-time communications, interactive communications, VoIP, just to name a few. Each of these services imposes its distinct QoS requirements. Thus, it is a formidable challenge to provide multimedia services which have strict quality-of-service (QoS) requirements on bandwidth, delay and delay jitter over wireless networks. This challenge has been amplified with the omnipresent proliferation of heterogeneous wireless systems and networks. In order to provide services with satisfying levels of user experience, QoS can be supported in different layers such as application and transport layer (Zhang, Yang, Zhu, 2005, p. 207-219). Additionally a recent trend has been to go beyond the layered protocol architecture and adapt cross-layer solutions. In this context, we believe that transport layer is a crucial area with respect to the promise that it offers for improvement of QoS in wireless multimedia.

In this chapter, QoS issues and support in transport protocols for wireless multimedia transmission are introduced. After an overview of the transport layer functionalities in a transmission and the multimedia characteristics, conventional transport layer protocols transmission control protocol (TCP) and user datagram protocol (UDP) are described. In this chapter, some of the proposed modifications to these protocols in order to improve multimedia transmission quality in wireless networks are also summarized. Particulary, UDP Lite, TCP friendly rate control protocol (TFRC), and real-time transport protocol (RTP)--real-time transport control protocol (RTCP) are mentioned. Finally, the chapter is concluded with some discussions on the current trends in transport protocols for wireless multimedia transmission and on some of the ongoing research issues.

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Table of Contents
Foreword
Abbas Jamalipour
Preface
Nicola Cranley , Liam Murphy
Chapter 1
Ronan Skehill, William Kent, Dorel Picovici, Michael Barry, Sean McGrath
This chapter introduces quality of service in multi-access wireless networks. Specifically it demonstrates how QoS is implemented in IEEE 802.11 and... Sample PDF
Evaluating QoS in a Multi-Access Wireless Network
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Chapter 2
Dirk Staehle, Andreas Mäder
This chapter gives an overview of the background and functionality of the high speed downlink packet access (HSDPA), and provides insights into the... Sample PDF
Radio Resource Management Strategies for HSDPA-Enhanced UMTS Networks
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Chapter 3
Nidal Nasser, Tarek Bejaoui
Major research challenges in the next generation of wireless networks include the provisioning of worldwide seamless mobility across heterogeneous... Sample PDF
Handoff Management in Next Generation Wireless Networks
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Chapter 4
Ming Li, Roberto Riggio, Francesco De Pellegrini, Imrich Chlamtac
This chapter provides a comprehensive review of the architectures, algorithms, and protocols in the topic of resource management in IEEE... Sample PDF
Resource Management in IEEE 802.11 Based Wireless Networks
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Chapter 5
Anna Sfairopoulou, Carlos Macián, Boris Bellalta
Network Technologies and Strategies (NeTS) Research Group, Universitat Pompeu Fabra, SpainThis chapter introduces the problems caused to voice over... Sample PDF
Adaptive Codec Selection for VoIP in Multi-Rate WLANs
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Chapter 6
Michael M. Markou, Christos G. Panayiotou
This chapter introduces the network buffer control techniques as a mean to provide QoS. This problem has been extensively studied in the context of... Sample PDF
Buffer Control Techniques for QoS Provisioning in Wireless Networks
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Chapter 7
Gabriel-Miro Muntean, Janet Adams
Wireless networks are becoming a part of everyday life for many people. When a mobile device has wireless LAN capability, multimedia content can be... Sample PDF
Power Saving in Wireless Multimedia Streaming to Mobile Devices
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Chapter 8
Jose Luis Jodra, Fidel Liberal, Begoña Blanco Jauregi
This chapter introduces the principal characteristics of MANETs and shows how these particularities may affect both QoS conditions and QoS... Sample PDF
Multimedia Services Provision in MANETs
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Chapter 9
Andrej Kos, Mojca Volk, Janez Bester
Commonly understood as the next generation networks (NGN), a composite environment of proven telecommunications and Internet-oriented mechanisms has... Sample PDF
Quality Assurance in the IMS-Based NGN Environment
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Chapter 10
Marcio Nieblas Zapater, Graça Bressan
This chapter discusses the quality assurance of multimedia services over IP networks from the end user standpoint and introduces the concept of... Sample PDF
Quality of Experience for Video Services
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Chapter 11
Dorel Picovici, John Nelson
Perceptual voice quality measurement can be defined as an objective quantification of an overall impression of the perceived stimulus. An... Sample PDF
Perceptual Voice Quality Measurements for Wireless Networks
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Chapter 12
Tacha Serif, Gheorghita Ghinea
This chapter describes an investigation exploring user experiences of accessing streamed multimedia content, when that content is tailored according... Sample PDF
Enhancing the Multimedia Tour Guide Experience: Transmission Tailoring Based on Content, Location, and Device Type
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Chapter 13
Harilaos Koumaras, Fidel Liberal, Lingfen Sun
The concept of PQoS, although in general it deals with the user satisfaction with a specific delivered/ requested service, is in practice... Sample PDF
PQoS Assessment Methods for Multimedia Services
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Chapter 14
Peifang Zhang, Scott Jordan
Emerging wideband code division multiple access (WCDMA) data services will likely require resource allocation to ensure that throughput targets are... Sample PDF
Scheduling and Access Control for Wireless Connections with Throughput Guarantees
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Chapter 15
Paolo Chini, Giovanni Giambene, Snezana Hadzic
Nowadays there is an increasing need of broadband communication anytime, anywhere for users that expect to receive multimedia services with support... Sample PDF
Broadband Satellite Multimedia Networks
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Chapter 16
Panagiotis Papadimitriou, Vassilis Tsaoussidis
An increasing demand for multimedia data delivery coupled with reliance in best-effort networks, such as the Internet, has spurred interest on... Sample PDF
End-to-End Support for Multimedia QoS in the Internet
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Chapter 17
Tarek Bejaoui, Nidal Nasser
This chapter introduces the cross layer design for resource allocation over multimedia wireless networks. Conventional layered packet scheduling and... Sample PDF
Cross-Layer Radio Resource Management Protocols for QoS Provisioning in Multimedia Wireless Networks
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Chapter 18
Gürkan Gür, Suzan Bayhan, Fatih Alagöz
This chapter introduces the QoS issues and support in transport protocols for wireless multimedia transmission. After an overview of the transport... Sample PDF
Transport Protocols and QoS for Wireless Multimedia
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