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What is Quality of Service (QoS)

Chapter 573
Encyclopedia of Information Science and Technology, Fourth Edition
It describes how well a flow of packets is served by the network. It is typically measured by different metrics, such as, end-to-end delay, jitter, packet loss rate, network availability, and bandwidth.
Published in Chapter:
QoS Architectures for the IP Network
Harry G. Perros (North Carolina State University, USA)
Copyright: © 2018 |Pages: 9
DOI: 10.4018/978-1-5225-2255-3.ch573
Abstract
When we call someone over the Internet using a service such as Skype or Google talk, we may experience certain undesirable problems. For instance, we may not be able to hear the other person very well, or even worse, the call may be dropped. In order to eliminate these problems, the underlying IP network has to be able to provide quality of service guarantees. Several schemes have been developed that enable the IP network to provide such guarantees. Of these schemes, the Multi-Protocol Label Switching (MPLS) and the Differentiated Services (DiffServ) are the most widely used. In this article, some of the salient features of MPLS and DiffServ are reviewed.
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Chapter 163
Modelling Quality and Pricing in Next Generation Telecom Networks
A set of service requirements that a network should meet when transferring traffic flows.
Published in Chapter: Modelling Quality and Pricing in Next Generation Telecom Networks; From: Encyclopedia of Organizational Knowledge, Administration, and Technology
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Chapter 603
An Overview of 3GPP Long Term Evolution (LTE)
Refers to a network’s ability to achieve maximum bandwidth and deal with other network performance elements like latency, error rate and uptime. QoS also involves controlling and managing network resources by setting priorities for specific types of data (video, audio, files) on the network. QoS is exclusively applied to network traffic generated for video on demand, IPTV, VoIP, streaming media, videoconferencing and online gaming.
Published in Chapter: An Overview of 3GPP Long Term Evolution (LTE); From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 13
Quantitative Productivity Analysis of a Domain-Specific Modeling Language
Properties of a software system related to non-functional aspects ( e.g. , latency, reliability, usability).
Published in Chapter: Quantitative Productivity Analysis of a Domain-Specific Modeling Language; From: Handbook of Research on Innovations in Systems and Software Engineering
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Chapter 2
Relevant Technologies to 6G
Is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud.
Published in Chapter: Relevant Technologies to 6G; From: Opportunities and Challenges of Industrial IoT in 5G and 6G Networks
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Chapter 568
Improving Quality of Business in Next Generation Telecom Networks
A set of service requirements that a network should meet when transferring traffic flows.
Published in Chapter: Improving Quality of Business in Next Generation Telecom Networks; From: Encyclopedia of Information Science and Technology, Fourth Edition
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Chapter 37
The IPv6 Protocol
The ability to provide specific guarantees to traffic flows regarding the network characteristics, such as packet loss, delay, and jitter experienced by the flows.
Published in Chapter: The IPv6 Protocol; From: Encyclopedia of Internet Technologies and Applications
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Chapter 11
The Path Computation Element (PCE)
Service performance experienced by a network user.
Published in Chapter: The Path Computation Element (PCE); From: Handbook of Research on Redesigning the Future of Internet Architectures
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Chapter 88
Implementation of Quality of Service in VoIP
QoS is the capability of providing resource assurance and service differentiation for different applications that use network resources.
Published in Chapter: Implementation of Quality of Service in VoIP; From: Encyclopedia of Multimedia Technology and Networking, Second Edition
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Chapter 699
Energy Efficiency Using the Fast Reroute Technique
the overall performance of a computer network. Several related aspects of the network service are error rates, bandwidth, throughput, transmission delay, availability, jitter.
Published in Chapter: Energy Efficiency Using the Fast Reroute Technique; From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 29
From Circuit Switched to IP-Based Networks
The end-to-end network performance seen by an application, typically measured in terms of packet delay, delay variation, and loss probability.
Published in Chapter: From Circuit Switched to IP-Based Networks; From: Encyclopedia of Multimedia Technology and Networking, Second Edition
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Chapter 36
A Model for Providing Mobile Multimedia Services Over 4G Networks
The level of service required by an application expressed in terms of certain parameters (e.g., bandwidth, maximum delay, loss, etc.).
Published in Chapter: A Model for Providing Mobile Multimedia Services Over 4G Networks; From: Handbook of Research on Mobile Multimedia, Second Edition
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Chapter 18
Semantic Modelling of Resource Dependability for SLA-Based Service Governance
The level of service provided by a service in processing and responding to requests.
Published in Chapter: Semantic Modelling of Resource Dependability for SLA-Based Service Governance; From: Handbook of Research on Service-Oriented Systems and Non-Functional Properties: Future Directions
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Chapter 604
Transmission of Scalable Video in Computer Networks
Process of providing different priorities to different flows of data or to guarantee a certain level of quality to a data flow. Examples of quality parameters are transmission rate, delay, delay variation (jitter), and packet loss.
Published in Chapter: Transmission of Scalable Video in Computer Networks; From: Encyclopedia of Information Science and Technology, Second Edition
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Chapter 48
Network Optimization Using Evolutionary Algorithms in Multicast Transmission
QoS is defined as a collective effect of service performance, which determines the degree of satisfaction of a user of the service. It is the capability of a network to provide better services to selected network traffic over various (heterogeneous) technologies. QoS is a set of service requirements to be met by the network while transporting a flow.
Published in Chapter: Network Optimization Using Evolutionary Algorithms in Multicast Transmission; From: Encyclopedia of Internet Technologies and Applications
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Chapter 3
Hierarchical Wireless Networks of Body Sensor Networks for Healthcare Applications
A set of characteristics of a network service that can be interpreted as representatives of its quality. It includes parameters and values such as data rates, acceptable delays, losses and errors.
Published in Chapter: Hierarchical Wireless Networks of Body Sensor Networks for Healthcare Applications; From: Handbook of Research on Developments in E-Health and Telemedicine: Technological and Social Perspectives
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Chapter 14
P2P in Scalable Cross-Layer Control Planes of Next Generation Networks
ITU-T Rec. E.800 defines QoS as “the collective effect of service performance which determine the degree of satisfaction of a user of the service.” ITU-T Rec. G. 1000 goes further in the definition of QoS: “from different perspectives: Customer’s QoS requirements; Service provider’s offerings of QoS (or planned/targeted QoS); QoS achieved or delivered; Customer survey ratings of QoS.
Published in Chapter: P2P in Scalable Cross-Layer Control Planes of Next Generation Networks; From: Handbook of Research on P2P and Grid Systems for Service-Oriented Computing: Models, Methodologies and Applications
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Chapter 3
Adaptive Transmission of Multimedia Data over the Internet
Quality of service refers to the capability of a network to provide better service to selected network traffic.
Published in Chapter: Adaptive Transmission of Multimedia Data over the Internet; From: Encyclopedia of Internet Technologies and Applications
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Chapter 9
Granular VNF-Based Microservices: Advanced Service Decomposition and the Role of Machine Learning Techniques
A measurement of the overall performance of a system or a service. In networking, it also includes traffic prioritization and resource reservation control mechanisms.
Published in Chapter: Granular VNF-Based Microservices: Advanced Service Decomposition and the Role of Machine Learning Techniques; From: Design Innovation and Network Architecture for the Future Internet
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Chapter 277
QoS Architectures for the IP Network
It describes how well a flow of packets is served by the network. It is typically measured by different metrics, such as, end-to-end delay, jitter, packet loss rate, network availability, and bandwidth.
Published in Chapter: QoS Architectures for the IP Network; From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 8
Cloud-Based IoT Architecture in Green Buildings
It provides a suitable environment for the data traffic over the network and controls the network resources. It expedites the data transfer and exchange of packets and reduces the packet loss.
Published in Chapter: Cloud-Based IoT Architecture in Green Buildings; From: Green Building Management and Smart Automation
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Chapter 59
Quality of Service and Service Level Agreements
The ability to provide specific guarantees to traffic flows regarding the network characteristics such as packet loss, delay, and jitter experienced by the flows.
Published in Chapter: Quality of Service and Service Level Agreements; From: Encyclopedia of Internet Technologies and Applications
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Chapter 23
Broker-Controller for NGN Management: A New NGOSS-Based Management Map for New Generation Network
Is the ability to convey a given type of traffic in good conditions, in terms of availability, throughput, delay, jitter, packet loss rate.
Published in Chapter: Broker-Controller for NGN Management: A New NGOSS-Based Management Map for New Generation Network; From: Handbook of Research on the IoT, Cloud Computing, and Wireless Network Optimization
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Chapter 46
A Mobile Fleet Application Case Study Using SyD Middleware
The goal of QoS is to provide satisfactory services to the user while executing programs. This can be functional or non-functional features.
Published in Chapter: A Mobile Fleet Application Case Study Using SyD Middleware; From: Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications
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Chapter 12
An Improved Modeling for Network Selection Based on Graph Theory and Cost Function in Heterogeneous Wireless Systems
Refers to the description or measurement of the overall performance of a service, such as access network or a cloud computing service, particularly the performance seen by the users of the network. To quantitatively measure quality of service, several related aspects of the network service are often considered, such as throughput, packet loss, packet delay, packet jitter, etc.
Published in Chapter: An Improved Modeling for Network Selection Based on Graph Theory and Cost Function in Heterogeneous Wireless Systems; From: Paving the Way for 5G Through the Convergence of Wireless Systems
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Chapter 65
Real-Time Protocols (RTP/RTCP)
The ability to provide specific guarantees to traffic flows regarding the network characteristics, such as packet loss, delay, and jitter experienced by the flows.
Published in Chapter: Real-Time Protocols (RTP/RTCP); From: Encyclopedia of Internet Technologies and Applications
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Chapter 533
Satellite-Based Mobile Multiservices Platform
Collection of performance parameters for network service including bandwidth, average delay, jitter, packet loss probability, among many others.
Published in Chapter: Satellite-Based Mobile Multiservices Platform; From: Encyclopedia of Information Science and Technology, Second Edition
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Chapter 38
Cost Models for Bitstream Access Service
It is an objective measure of the satisfaction level of the user. It refers to control mechanisms that guarantee a certain level of performance to a data flow in accordance with requests from the application program. QoS guarantees are important when network capacity is limited, especially for real-time and streaming applications—for example, voice over IP and IP-TV, since these often require fixed bit rate and may be delay sensitive.
Published in Chapter: Cost Models for Bitstream Access Service; From: Encyclopedia of Multimedia Technology and Networking, Second Edition
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Chapter 18
Reliability, Fault Tolerance, and Quality-of-Service in Cloud Computing: Analysing Characteristics
Quality of service (QoS) generally refers to a network’s capability to achieve maximum bandwidth and deal with other network performance elements like latency, error rate and uptime. Quality of service also involves controlling and managing network resources by setting priorities for explicit types of data (files, audio and video) on the network or cloud.
Published in Chapter: Reliability, Fault Tolerance, and Quality-of-Service in Cloud Computing: Analysing Characteristics; From: Handbook of Research on Security Considerations in Cloud Computing
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Chapter 17
Perception-Based Speech Quality Measurement in Modern Telecommunications
The set of those quantitative and qualitative characteristics of a distributed multimedia system, which are necessary in order to achieve the required functionality of an application.
Published in Chapter: Perception-Based Speech Quality Measurement in Modern Telecommunications; From: Handbook of Research on Mobile Multimedia, Second Edition
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Chapter 1
Cloud Computing: A Security and Defense Proposal
Quality of service (QoS) is the description or measurement of the overall performance of a service, such as a telephony or computer network, or a cloud computing service.
Published in Chapter: Cloud Computing: A Security and Defense Proposal; From: Contemporary Challenges for Cyber Security and Data Privacy
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Chapter 232
Evaluating Computer Network Packet Inter-Arrival Distributions
A method of marking certain packets for special handling to ensure high reliability or low delay.
Published in Chapter: Evaluating Computer Network Packet Inter-Arrival Distributions; From: Encyclopedia of Information Science and Technology, Second Edition
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Chapter 8
Managing 5G Converged Core With Access Traffic Steering, Switching, and Splitting: From Hybrid Access to Converged Core
A set of characteristics that identify the type of treatment a certain traffic should receive in the network.
Published in Chapter: Managing 5G Converged Core With Access Traffic Steering, Switching, and Splitting: From Hybrid Access to Converged Core; From: Paving the Way for 5G Through the Convergence of Wireless Systems
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Chapter 7
Quality of Service of Grid Computing
QoS defines nonfunctional characteristics of a system, affecting the perceived quality of the results.
Published in Chapter: Quality of Service of Grid Computing; From: Handbook of Research on Grid Technologies and Utility Computing: Concepts for Managing Large-Scale Applications
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Chapter 41
A Strategy for Enterprise VoIP Security
A set of quality requirements on the collective behavior of one or more objects in the field of telephony.
Published in Chapter: A Strategy for Enterprise VoIP Security; From: Handbook of Research on Information Security and Assurance
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Chapter 32
Scalable Internet Architecture Supporting Quality of Service (QoS)
Quality of Service (QoS) is defined as supporting and guaranteeing network resources to various users, applications and services in the Internet.
Published in Chapter: Scalable Internet Architecture Supporting Quality of Service (QoS); From: Handbook of Research on Scalable Computing Technologies
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Chapter 751
Internet of Things (IoT)
Quality of Service is a measurement of the overall performance of a telephony or computer network, particularly the performance seen by the users of the network. Most common QoS metrics are delay, jitter (delay variation), throughput,, availability, packet drop rate.
Published in Chapter: Internet of Things (IoT); From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 713
Real-Time Communication Support in IEEE 802.11-Based Wireless Mesh Networks
A set of service requirements that need to be met by the network while transmitting data.
Published in Chapter: Real-Time Communication Support in IEEE 802.11-Based Wireless Mesh Networks; From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 286
Strong Networks Grow Distance Learning
Refers to resource reservation control mechanisms. Quality of Service can provide different priorities to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the application program or the internet service provider policy
Published in Chapter: Strong Networks Grow Distance Learning; From: Encyclopedia of Distance Learning, Second Edition
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Chapter 288
The Impact of Network-Based Parameters on Gamer Experience
A term used to describe performance criteria within a network. The criteria is quite varied, ranging from a loss rate below a given percentage or a bounded delay. BE is generally the term used when there is no specified QoS.
Published in Chapter: The Impact of Network-Based Parameters on Gamer Experience; From: Encyclopedia of Information Science and Technology, Second Edition
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Chapter 5
Power-Aware Networking
It is the idea that transmission rates, error rates, and other characteristics can be measured, improved, and, to some extent, guaranteed in advance.
Published in Chapter: Power-Aware Networking; From: Handbook of Research on Redesigning the Future of Internet Architectures
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Chapter 23
Video and Data Dissemination in Mobile Broadcasting Environments
A notion stating that transmission quality and service availability can be measured, improved, and, to some extent, guaranteed in advance. QoS is of particular concern for the continuous transmission of multimedia information and declares the ability of a network to deliver traffic with minimum delay and maximum availability.
Published in Chapter: Video and Data Dissemination in Mobile Broadcasting Environments; From: Handbook of Research on Mobile Multimedia, Second Edition
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Chapter 55
Optimizing Inter-Domain Internet Multicast
QoS represents the set of techniques necessary to manage network bandwidth, delay, jitter and packet loss. From a business perspective, it is essential to assure that the critical applications are guaranteed the network resources they need, despite varying network traffic load.
Published in Chapter: Optimizing Inter-Domain Internet Multicast; From: Encyclopedia of Internet Technologies and Applications
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Chapter 60
Quality of Service Architectures
The ability to provide specific guarantees to traffic flows regarding the network characteristics such as packet loss, delay, and jitter experienced by the flows.
Published in Chapter: Quality of Service Architectures; From: Encyclopedia of Internet Technologies and Applications
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Chapter 45
Multicast of Multimedia Data
Quality of service refers to the capability of a network to provide better service to selected network traffic.
Published in Chapter: Multicast of Multimedia Data; From: Encyclopedia of Internet Technologies and Applications
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Chapter 49
High-Speed Multimedia Networks: Critical Issues and Trends
QoS functionality enables service providers to guarantee and enforce transmission quality parameters (e.g. bandwidth, jitter, delay, packet loss ratio) according to a specified service-level agreement (SLA) with the customer.
Published in Chapter: High-Speed Multimedia Networks: Critical Issues and Trends; From: Handbook of Research on Telecommunications Planning and Management for Business
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Chapter 14
Performance Improvement of Clustered WSN by Using Multi-Tier Clustering
The quality of service refers to several related aspects of telephony and computer networks that allow the transport of traffic with special requirements. The goal of QoS is to provide guarantees on the ability of a network to deliver predictable results. It was defined by International Telecommunication Union.
Published in Chapter: Performance Improvement of Clustered WSN by Using Multi-Tier Clustering; From: Handbook of Research on Progressive Trends in Wireless Communications and Networking
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Chapter 59
Secure Resource Optimization in Distributed Service Computing
It refers to the capability of a service provider to provide a better service to its customers. The elements of QoS often include security, performance, and availability that are defined in SLA in service computing.
Published in Chapter: Secure Resource Optimization in Distributed Service Computing; From: Handbook of Research on Telecommunications Planning and Management for Business
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Chapter 13
Remote Elderly Health Monitoring System Using Cloud-Based WBANs
Refers to the ability of a network to give better support of the selected network traffic over different advances, including Frame Relay, Asynchronous Transfer Mode (ATM), Ethernet and 802.1 networks, SONET, and IP-routed networks that may utilize any or all of these basic technologies.
Published in Chapter: Remote Elderly Health Monitoring System Using Cloud-Based WBANs; From: Handbook of Research on Cloud and Fog Computing Infrastructures for Data Science
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Chapter 67
Scalable Reservation-Based QoS Architecture (SRBQ)
Subjectively defined in Recommendation E.800 of the ITU-T as “The collective effect of service performance which determines the degree of satisfaction of a user of the service,” QoS refers to the probability of the network meeting a given traffic contract, which may be quantitatively expressed by parameters such as transfer delay and jitter and probability of packet loss, error, or out-oforder delivery.
Published in Chapter: Scalable Reservation-Based QoS Architecture (SRBQ); From: Encyclopedia of Internet Technologies and Applications
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Chapter 545
Resource Management for Multimedia Services in Long Term Evaluation Networks
QoS is characterized as “totality of characteristics of a telecommunications service that bear on its capacity to fulfill expressed and inferred needs of the user of the service.”
Published in Chapter: Resource Management for Multimedia Services in Long Term Evaluation Networks; From: Encyclopedia of Information Science and Technology, Fourth Edition
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Chapter 24
Requirements Specification as Basis for Mobile Software Quality Assurance
Refers to a broad set of networking technologies and techniques used to provide guarantees on the ability of a network to deliver predictable results.
Published in Chapter: Requirements Specification as Basis for Mobile Software Quality Assurance; From: Handbook of Research on Mobile Software Engineering: Design, Implementation, and Emergent Applications
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Chapter 16
Derivation and Simulation of an Efficient QoS Scheme in MANET through Optimised Messaging Based on ABCO Using QualNet
Of a computer network is the overall performance of the network, especially in terms of the users’ perspective.
Published in Chapter: Derivation and Simulation of an Efficient QoS Scheme in MANET through Optimised Messaging Based on ABCO Using QualNet; From: Handbook of Research on Swarm Intelligence in Engineering
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Chapter 60
Location-Based Network Resource Management
A term that refers to the quality of network services provided by a specific network.
Published in Chapter: Location-Based Network Resource Management; From: Handbook of Research on Mobile Multimedia, Second Edition
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Chapter 138
Programming Body Sensor Networks
The capability of the system of adjusting itself or of offering mechanisms that allow its adjustment in order to fulfill the requisites that are defined for each application. In WSNs the parameters that are commonly related to the quality of the service that is offered by this kind of system are application lifetime (which is related to energy consumption), connectivity, confidentiality, reliability, bandwidth, and transmission power.
Published in Chapter: Programming Body Sensor Networks; From: Encyclopedia of Healthcare Information Systems
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Chapter 28
Collaborative Virtual Environments and Multimedia Communication Technologies in Healthcare
QoS refers to control mechanisms that can provide different priority to different users or data flows, or guarantee a certain level of performance to a data flow in accordance with requests from the application program.
Published in Chapter: Collaborative Virtual Environments and Multimedia Communication Technologies in Healthcare; From: Handbook of Research on Distributed Medical Informatics and E-Health
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Chapter 53
Optical Burst Switching
Refers to the capability of a telecommunication network to meet a requested quality or traffic contract. In many cases quality of service is refered to the probability of a packet succeeding in propagating through a certain link or path in the network, within its delay bounds.
Published in Chapter: Optical Burst Switching; From: Encyclopedia of Internet Technologies and Applications
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Chapter 4
Design of a Blockchain-Powered Biometric Template Security Framework Using Augmented Sharding
It is the use of mechanisms or technologies that work on a network to control traffic and ensure the performance of critical applications with limited network capacity.
Published in Chapter: Design of a Blockchain-Powered Biometric Template Security Framework Using Augmented Sharding; From: Advancements in Quantum Blockchain With Real-Time Applications
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Chapter 69
Evolution of TD-SCDMA Networks
A term which specifies the detail requirements on delay, delay jitter, packet loss, and data rate
Published in Chapter: Evolution of TD-SCDMA Networks; From: Encyclopedia of Multimedia Technology and Networking, Second Edition
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Chapter 91
Traffic Control
End-to-end network performance defined from the perspective of a specific user’s connection.
Published in Chapter: Traffic Control; From: Encyclopedia of Internet Technologies and Applications
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Chapter 696
Constructing New Venues for Service Improvements Using the Architecture of Preventive Service Systems
The level of quality of services provided to the client determined by a set of quantitative indicators, such as service availability (service uptime). This measure is often operated over time in service control processes to identify changes in the quality of delivered services.
Published in Chapter: Constructing New Venues for Service Improvements Using the Architecture of Preventive Service Systems; From: Encyclopedia of Information Science and Technology, Third Edition
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Chapter 50
Customizing Multimedia and Collaborative Virtual Environments
An agreement between a multimedia application and the communication/presentation platform described by a set of quantitative and qualitative parameters such as delay, jitter (delay variation), bandwidth, packets loss, throughput, etc.
Published in Chapter: Customizing Multimedia and Collaborative Virtual Environments; From: Encyclopedia of Networked and Virtual Organizations
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Chapter 4
A Survey of Efficient Resource Discovery Techniques on DHTs
Computing term referring to the ability to guarantee some measurable and pre-established factors (usually, network or disk throughput) associated with a task during the whole execution time of such task. Service factors are usually ensured, pre-scheduling necessary resources to handle tasks and/or establishing priorities among tasks.
Published in Chapter: A Survey of Efficient Resource Discovery Techniques on DHTs; From: Handbook of Research on P2P and Grid Systems for Service-Oriented Computing: Models, Methodologies and Applications
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