Intelligent Quality of Service Technologies and Network Management: Models for Enhancing Communication

Intelligent Quality of Service Technologies and Network Management: Models for Enhancing Communication

Pattarasinee Bhattarakosol (Chulalongkorn University, Thailand)
Indexed In: SCOPUS
Release Date: April, 2010|Copyright: © 2010 |Pages: 404
DOI: 10.4018/978-1-61520-791-6
ISBN13: 9781615207916|ISBN10: 1615207910|EISBN13: 9781615207923|ISBN13 Softcover: 9781616922917
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Description & Coverage

The increasing reliance upon networking and mobile networking devices in the modern world demands constant improvement of network Quality of Service (QoS).

Intelligent Quality of Service Technologies and Network Management: Models for Enhancing Communication explores the interrelated natures of network control mechanisms and QoS and offers fundamental knowledge on the subject, describing the significance of network management and the integration of knowledge to demonstrate how network management is related to QoS in real applications. Engaging and innovative, this book provides practical solutions that integrate network management and QoS strategies for real-world application.


The many academic areas covered in this publication include, but are not limited to:

  • Analysis of Quality of Service Architectures
  • Intra and Inter Domain IPv6 QoS Management
  • IP Quality of Service Models
  • Network Performance Monitoring for Effective Quality of Service
  • QoS Based Network Management Policies in Healthcare
  • QoS Constrained Communication and Data Integration among Multiple Agents
  • QoS Routing and Management in Backbone Networks
  • QoS Signaling Security in Mobile Ad Hoc Networks
  • Quality of Service in Mobile Ad Hoc Networks
  • Quality of Service to Computer Networks through Traffic Modeling
Reviews and Testimonials

This book involves principal QoS issues with relation to heterogeneous networks, pricing scheme, various routing methods, traffic modeling, QoS case studies, intra/inter domain management, and so forth.

– Sunyoung Han, Seoul, Korea
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Editor Biographies
Dr. Pattarasinee Bhattarakosol is an Assistant Professor in the Computer Science Program, Department of Mathematics, Faculty of Science, Chulalongkorn University, Thailand. She graduated from Wollongong University since 1996. Her interested area is in the computer network and software engineering. Her main research is focusing on the quality of services over networks. Currently, she has many international publications both journal and proceedings.
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Why Network is important?

People use data in various reasons; some use data to evaluate their performance, while some use data to create value of human’s lives. Although there are various objectives of using data, the most important problem is “how people gain access to the right data in the right time?” because data are distributed in different form and places. The above problem leads to the invention and installation of data communication and networking system in the previous age. These systems are installed to support data exchange process and remote access to serve human’s activities. Moreover, in order to serve people with the requested data in the suitable time interval, the communication system classifies applications over the network in 2 different categories: real time applications, and non-real time applications. These classifications help manipulating the condition of time to deliver the data packets. The real time applications refer to applications that the delay from data transfer situation can damage the waiting process; the non-real time applications refer to the application that the delay from data transfer situation has no affect to the waiting process. The example of the real time applications is the money-transfer application that allows a bank customer to transfer his money between banking accounts; this case cannot allow having delay because the financial situation of the customer will be unsecured. The example of the non-real time application is the e-mail application; this case the delay of the message will not have any affect to any process of the receiver.

Problems over Network Technology

The results from the implementing network technologies lead to the growth rate of data communication among organizations, and accommodations. However, there are some errors, or defects during the communication process, such as data packet lost, high delay, high error rate, etc. These errors or defects can cause critical damages to organization or human’s lives. For example, if there are missing packets of security warning system while an intrusion occurs, then the system inspector will not receive any warning signals and the system will not be protected. In some situation, a long delay of packets also initiates severe lost such as life. For example, the message from a fire alarm system to a fire station must not have a long delay because the lost from the fire can be lives or valuable assets.

Why & What Quality of Service (QoS)?

According to problems mentions above, all services over network must be fixed and guaranteed in order to prevent all lost and damages. Therefore, it is the obligation of network providers to provide reliable and available networks for their customers. So, the network providers must find mechanisms to protect and detect all defects and errors that might occur during their services in order to maintain their quality of services (QoS) or services capabilities. When considering about the quality of services of a network, it usually related to the users’ appreciation rather than the measurement metrics. However, the quality of services usually refers to the ability to manage all kinds of packets over the network based on the payload of those packets. Moreover, these abilities include the efficiency to which packets are classified by network providers towards their customers and service level agreements (SLAs). Thus, each customer and their applications and devices will be differentiated according to their requirements.

Factors and Indicators of QoS

Currently, QoS is a significant issue for all network providers. The fundamental concept about QoS measurement is based on the traffic over the network. Nevertheless, this traffic condition is relied on various factors, such as network’s queuing mechanism, network’s load balancing mechanism, process time at destination, etc. Consequently, different indicators are used to determine the level of QoS. Generally, QoS metric is measured in a certain period of time. These measurement values will be stored in the management information based, or log file of each network. Network administrator is responsible to analyze these values to indicate the QoS of the network over the measurement time, including making a plan for further growth of the network. Thus, it is the truth that the successes or failures of QoS are the main responsibility of the network administrator. Consequently, the network administrators are responsible for a qualified network management policy.

Network Management & QoS

The network management means a control mechanism to maintain the network so that it can continuously grant services to customers as needed with trust, available and reliable. Even though network management is important as described in their definition, it is usually applied to a large scale network with high complexity, and a large number of connecting nodes over the network. When a network is in a proper managed, all traffics flow and reach to destinations as requested in time; otherwise, the data packets flood over the network and may be cascaded during the transmission time because of a long delay. Without a good management policy, the transmission condition over a network cannot be guaranteed the arrival time of the delivered packets; some might be lost and some might have a long delay time. Unfortunately, these lost and long delay times can bring damages to the organization. Thus, a consequence of a good network management is a reliable and available network with high performance, high throughput, and low delay. These results indicate the quality of services of the network as defined above. Based on the organizational profiles, different organizations implement different network model under diverse network requirement. So, the quality of services and their levels over networks based on network requirements are dissimilar. Furthermore, the diversity of QoS maps to miscellaneous network management policies.

Themes of the Book

The book consists of 3 main parts, starting from giving fundamental knowledge on the subject of QoS. Then, the second part describes significant of network management before the last part is the integration of knowledge to show how the network management is related to QoS in real applications.

Part 1: Quality of Services

The objective of this part is to give a clear picture of the word “Quality of Service”. Thus, this part will start with the chapter of Eva et al. who have elaborated all contexts relevant to QoS in network and telecommunication. This chapter includes the evaluation and measurement metrics that are usually applied to maintain QoS over the communication system. Then, in the second chapter written by Marques et al. describes the broad concept of improving QoS over wired and wireless sensor network (WSN). This article presents from the fundamental mechanism up to the complicate mechanisms that are obtained from combining of several architectures and technologies. After reading this chapter, readers will have various solutions for supporting end-to-end QoS on heterogeneous networks. Afterwards, the dept literature reviews of the IP QoS model and the comparisons among the best-effort services, the Integrated and Differentiated services are stated in the chapter of El-Kader. Furthermore, the characteristics of QoS for WSN on different network layers are illustrated by Shah et al in following chapter. Therefore, readers will understand QoS mechanisms that are implemented on different layers of network to support and provide optimize performance for various types of applications. The last chapter of this part is written by Marwaha et al. who have pointed out the factors of achieving QoS of MANET. Moreover, the various QoS models of MANET have been clearly elaborated with mechanisms to support these models.

Part 2: Network Management Model

The intention of this part is to state network management models that are implemented to maintain the QoS of a network. The first chapter of this part focuses on the method to control multimedia transfer mechanism over a network where a significant loss of multimedia data over a wireless network occurs. The implementation of round trip time control was proposed by Ramachandra and Jain with the experimental results, evaluation and analysis. Another network management mechanism is related to the traffic engineering, especially the routing algorithm, or path finding. Presently, various protocols and algorithms have been introduced and implemented. However, there are some defects remained. Therefore, in the second chapter, a new routing algorithm is implemented in conjunction with a heuristic path finding algorithm was proposed by Goodridge, et al. to find the best routing path for network traffic flow. So, the QoS for data transmitting can be obtained because the call back rate is lower than normal routing mechanism. Moreover, this proposed mechanism enables dynamic admission control and manageable environment. Besides, the emerging collaborative network management models is proposed by Bertrand et al. in order to gain the traffic management in backbone networks in the following chapter. Finally, Vieira and Bozinis proposed the use of network traffic models. This application is considered to increase the QoS because it leads to the correct estimation of bandwidth. Therefore, the loss probability can be guaranteed.

Part 3: Integrations of Quality of Service and Network Management Model

After readers have a clear understanding of QoS and roles of network management models, the integration of QoS and network management models will be displayed in this part. The first chapter of this part begins with the evolution of voice network technology where the transitions from circuit-switched public telephone network to IP packet-switched network are described by Bross et al. The paper has indicated requirements and QoS evaluation metrics of these indicators. Therefore, the QoS of each technology is clarified. Then the traffic and performance of mobile monitoring system have been elaborated by Papantoni-Kazakos and Burrell in the following chapter. This chapter described design, analysis, and evaluation of distributed and dynamic techniques that are used to manage the traffic and performance of sub-network. The readers will see the traffic model, including the network management context. Furthermore, the future research related to this area is also recommended. For the next chapter, Ramachandra and Jain had proposed a model based QoS constrained communication using multiple agents. These agents are used to exchange multimedia data over a network. The exchanged data performs via agents, including the integration of information from all agents. Moreover, the transmission rate is calculated using the result from neural networks. In the forth chapter of this part, the authors, Weisser and Tomasik, provides an alternative solution for obtaining a QoS network management by introducing an inter-domain hierarchy. Therefore, the congestion problem of the entire domain can be avoided using the other domain congestion information. Then the inter-domain and intra-domain using IPv6 for QoS management will be demonstrated by Fgee et al. in the following chapter. This chapter provides useful information of IPv6 related to the network management area. Moreover, various pricing schemes are also elaborated. For the chapter written by Bouras et al., it gives an example of implementing a QoS network for the pan-european research and academic network project, GÉANT2. In this article, the QoS on each network layer is put in details. In addition, the network management structures and brokers of GÉANT2 system are described in details. After that a case study of a healthcare network in Thailand has been investigated by Bhattarakosol and Tanchotsrinon. This chapter demonstrates that applying a good network management policy can obtain a high quality of services without high investment cost. Then, the QoS of MANET focussing in the security issue will be discussed in the last chapter of this book by Sornil.

Preliminary conclusion

The contributions of this book are as follow.
1. Meaning and important of quality of services over networks has been clarified.
2. Various network management models and mechanisms that are applied for quality of services have been described.
3. Linkages between quality of services and network management methodologies are clearly presented with examples.
After reading these chapters, readers will realize that a high quality of services over various types of networks has many alternative solutions to be applied, with or without increasing the investment cost.