An approach to measurement based Quality of Service control for communications networks (original) (raw)

Measuring Quality of Service in Packet Networks

1999

Abstract Several approaches have been proposed to empower communication systems with quality of service (QoS) capabilities. In general, their main goal is to coherently support the end-to-end performance needs of applications, based on the establishment of, and agreement on, a set of concepts, policies and mechanisms. Regardless of the used approach, an important challenge associated with quality of service provision is the development of an efficient and flexible way to monitor QoS.

QoS metric for packet networks

1998

abstract Several approaches have been proposed to empower communication systems with quality of service (QoS) capabilities. In general, their main goal is to coherently support the end-to-end performance needs of applications, based on the establishment of, and agreement on, a set of concepts, policies and mechanisms. Regardless of the used approach, an important challenge associated with quality of service provision is the development of an efficient and flexible way to monitor QoS.

Network quality of service : know it all

2009

Click here if your download doesn"t start automatically Network Quality of Service Know it All Network Quality of Service Know it All The term Quality of Service, abbreviated QoS, refers to network resource control mechanisms. Quality of Service is the ability to provide different priority to different applications, users, or data flows, or to guarantee a certain level of performance to a data flow. This book brings all of the elements of network quality of service (QoS) together in a single volume, saving the reader the time and expense of making multiple purchases. It introduces network QoS, explains the basics, describes the protocols, and discusses advanced topics, by the best and brightest experts in the field. It is a quick and efficient way to bring valuable content together from leading experts in the field while creating a one-stop-shopping opportunity for customers to receive the information they would otherwise need to round up from separate sources.

Quality of service statistics over heterogeneous networks: Analysis and applications

European Journal of Operational Research, 2008

Heterogeneous wireless/wired networks and ubiquitous environments are gaining ever more attention by research community. To properly control and manage such puzzles a deep knowledge of Quality of Service parameters is needed and, therefore, a complete and robust performance assessment is necessary. This paper deals with a performance evaluation and measurement of a number of heterogeneous end-to-end paths taking into account a wide range of statistics. To study the behavior of QoS parameters, an active measurement approach has been introduced for the analysis of properties we called (i) concise statistics (mean, standard deviation, inter quantile range, minimum, maximum, and median) and (ii) detailed statistics (Probability Density Function, Auto Correlation Function, Entropy, Complementary Cumulative Distribution Function, and Bivariate Probability Density Function). We show how, thanks to this view on QoS statistics, a more complete understanding of QoS parameters behavior is possible. In addition, we show how the measured statistics can be fruitfully used in the context of network control and management. More precisely, we present two proof of concepts regarding frameworks for QoS-based anomaly detection and for QoS-based identification of network elements.

Measurement Based Modeling of Quality of Service in the Internet: A Methodological Approach

2001

This paper introduces a newmetho dology for analyzing and interpreting QoS values collected by active measurement and associated with an a priori constructive model. The originality of this solution is that we start with observed performance (or QoS) measures and derive inputs that have lead to these observations. This process is illustrated in the context of the modeling of the loss observed in an Internet path. It provides a powerful solution to address the complex problem of QoS estimation and network modeling.

The Management Infrastructure of a Network Measurement System for QoS Parameters

2006 International Conference on Software in Telecommunications and Computer Networks, 2006

The paper presents the designing principles of a management infrastructure for monitoring the capabilities of different network interface cards (Gigabit Ethernet, Endace), both for traffic generation and capturing at reception. This evaluation is useful to asses the goodness of captured traffic analysis and QoS performance measurements, using PC based platforms. The idea was to implement the communication of the management information between an administration console and a set of distributed SNMP-based software measurement agents for GNU/Linux platforms that enable to perform QoS measurement sessions.

QoS metric for packet networks

Internet Routing and Quality of Service, 1998

Several approaches have been proposed to empower communication systems with quality of service (QoS) capabilities. In general, their main goal is to coherently support the end-to-end performance needs of applications, based on the establishment of, and agreement on, a set of concepts, policies and mechanisms. Regardless of the used approach, an important challenge associated with quality of service provision is the development of an efficient and flexible way to monitor QoS. The existence of an effective metric to quantify the QoS offered to classes or flows of data, and to assess the performance of communication systems, would facilitate the implementation of a QoS monitor. Such a QoS metric should be able to produce comparable measures, independently of the nature and scope of the objects to quantify, that is, should turn possible uniform QoS measures. Nevertheless, the main difficulty related to the development of such metric steams exactly from the disparate nature and scope of the things to measure (typically, throughput, transit delay or loss). This paper discusses the above mentioned difficulties and proposes a QoS metric intended to support QoS measurements on packet switching networks. In our opinion, the proposed metric will facilitate the development of an effective and truly integrated QoS management system, which is fundamental to construct QoS-capable communication systems able to efficiently deal with the increasing variety of applications. This paper also presents the main challenges found during the first approach to the QoS metric implementation. The intention was to test the metric basic concepts, to assess its feasibility, and to measure its associated overhead. The results of these overhead tests are also presented.

Quality of Service in Communication Systems���Challenges and Approaches

1998

Abstract Several approaches have been proposed to empower communication systems with quality of service (QoS) capabilities. In general, their main objective is to define ways to coherently support end-to-end performance application needs, based on the establishment of and agreement on a set of concepts, policies and mechanisms.

Quality of service provision in high-speed networks: an active approach

9th International Conference on Electronics, Circuits and Systems, 2002

Active networks (ANs) provide a programmable platform on which network services can he constructed and refined by injecting code into the nodes of the network. They offer an effective scheme for high-speed networks to manage the provision of quality of service (QoS) that advanced services may require. In this paper, we propose an approach that allows the description of QoS requirements as programs that can he used by a node in order to change its behavior to satisfy the required QoS. The approach is based on the notion of logical data unit state that can he observed at an appropriate level of granularity and implemented using several mechanisms for resource reallocation.