Multimedia Services Provision in MANETs

Multimedia Services Provision in MANETs

Jose Luis Jodra (University of the Basque Country, Spain), Fidel Liberal (University of the Basque Country, Spain) and Begoña Blanco Jauregi (University of the Basque Country, Spain)
DOI: 10.4018/978-1-59904-820-8.ch008
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Abstract

This chapter introduces the principal characteristics of MANETs and shows how these particularities may affect both QoS conditions and QoS management/provisioning systems, and therefore the capabilities of MANETs for properly providing multimedia services. After a deep analysis of different QoS mechanisms at different layers, the authors claim that QoS management cannot be handled only at the network layer or by applying some QoS-aware routing protocols. In fact, any end-to-end QoS provision architecture will demand QoS control mechanisms and information exchange among all the layers. A clear understanding of different proposals aimed at coping with QoS requirements at different layers will not only provide researchers with valuable information for designing better multimedia capable MANETs, but will also assist them in evaluating the need for a unified cross-layer approach in order to optimize the performance of analyzed protocols.
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Introduction To Manets

Since the 1970s, the mobile ad hoc networks (MANETs) have attracted a lot of interest from both the industry and the research community due to their particular conditions. It is not easy to provide a proper single definition for these networks, since multitude of them have been proposed in today’s literature. Nevertheless, we can use the definition made by Internet Engineering Task Force (IETF), the body responsible for guiding the evolution of the Internet:

A mobile ad hoc network (MANET) is an autonomous system of mobile routers (and associated hosts) connected by wireless links. The routers are free to move randomly and organize themselves arbitrarily; thus, the network’s wireless topology may change rapidly and unpredictably. Such a network may operate in a stand-alone fashion, or may be connected to the larger Internet.

So, a typical MANET (Maltz, 1999) is a set of potentially mobile nodes that possibly concur to share information. During that exchange of information, different nodes can be continuously moving, so that the network must be prepared to get adapted continuously. Due to the lack of infrastructure, the nodes have to organize by themselves in the network and set up routes among them without any outer help.

In general, the ad hoc networks will make possible the communication between nodes connected indirectly by jumping through other nodes (Figure 1) forming a peer-to-peer connection. In this communication intermediate nodes act like routers, so that nodes can represent both roles: router and host.

Figure 1.

Mobile ad hoc network

MANETs can appear in two forms in real life. The first one consists of a pure wireless ad hoc network where all nodes are mobile and have the same characteristics. The second and most common one is a mixed hybrid network with wireless and fixed nodes. The main function of the fixed nodes is to forward the traffic to the mobile nodes. Therefore, the fixed nodes must have greater capacity and reliability than the mobile ones.

Special characteristics of MANETs constitute a centre of attention for the industry as for the research community. Since they don’t need any infrastructure they promote collaborative work in areas where it was unthinkable before (conferences, for the reestablishment of the communications in areas desolated by natural disasters, in the battlefield, etc.). Furthermore, there have recently arisen other new scenarios that suggest the need for reliable MANETs, such as vehicular or sensor networks and new videogames portable platforms. In addition, the evolution of PDAs, videogames, and multimedia devices in vehicles demand both higher and more stable QoS requirements from the network.

Table 1 shows different application areas for MANETs, as well as the services available in each area.

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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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About the Contributors