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QoS Over Heterogeneous Networks
By: Mario MarcheseeBook Publisher: John Wiley & Sons
Imprint: John Wiley & Sons, Ltd.
Format: Adobe Encrypted (DRM)
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The importance of quality of service (QoS) has risen with the recent evolution of telecommunication networks, which are characterised by a great heterogeneity. While many applications require a specific level of assurance from the network; communication networks are characterized by different service providers, transmission means and implementer solutions such as asynchronous transfer mode (ATM), Internet protocol version 4 (IPv4), IPv6 and MPLS.
Providing comprehensive coverage of QoS issues within heterogeneous network environments, “QoS Over Heterogeneous Networks” looks to find solutions to questions such as does QoS fit within heterogeneous networks and what is the impact on performance if information traverses different network portions that implement specific QoS schemes.
Includes: A series of algorithms and protocols to help solve potential QoS problems. State of the art case studies and operative examples to illustrate points made. Information on QoS mapping in terms of service-level specification (SLS) and an in-depth discussion of related issues Chapters end-to-end (E2E) QoS, QoS architecture, QoS over heterogeneous networks and QoS internetworking and mapping.
An ideal book for graduate students, researchers and lecturers. System designers, developers and engineers will also find “QoS Over Heterogeneous Networks” a valuable reference.
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| Title of Technology eBook: QoS Over Heterogeneous Networks | |
| Release Date: 07-20-2007 | |
| Publisher: John Wiley & Sons, Ltd. |
This eBook download is available in the following formats:
| Parent title | QoS Over Heterogeneous Networks |
|---|---|
| Encrypted (DRM) | Yes |
| SKU | 9780470058787 |
| File size | 14209 |
| Security | n/a |
| Printing | Not allowed |
| Copying | Not allowed |
| Read aloud | No Sys requirements Download reader |
| Devices | Samsung Tablet, Apple Ipad & Iphone, Barnes & Noble Nook, Kobo eReader, Aluratek Libre, Iliad, Nokia, Blackberry, Hanlin |
| Note | Excellent navigation features are available via Adobe such as bookmarks and a quick access table of contents. Text search is easily accessible. An Adobe DRM-protected file is different than a pdf file in that it uses Adobe DRM (Digital Rights Management) technology, which authors and publishers use to protect their content from illegal online distribution and to set certain privileges such as restrictions on copying and printing. |
QoS Over Heterogeneous Networks
Chapter One
What is QoS?
1.1 QoS Definition
According to ISO 8402, the word quality is defined as "the totality of characteristics of an entity that bear on its ability to satisfy stated and implied needs". ISO 9000 defines quality as the degree to which a set of inherent characteristics fulfils requirements. ITU-T (Recommendation E.800 [ITU-TE.800]) and ETSI [ETSI-ETR003] basically defines Quality of Service (QoS) as "the collective effect of service performance which determine the degree of satisfaction of a user of the service". As stated in [ETSI-TR102], IETF considers QoS as the ability to segment traffic or differentiate between traffic types in order for the network to treat certain traffic flows differently from others. QoS encompasses both the service categorization and the overall performance of the network for each category.
Concerning the network viewpoint, QoS is the ability of a network element (e.g. an application, host or router) to have some level of assurance that its traffic and service requirements can be satisfied. QoS manages bandwidth according to application demands and network management settings.
The term "QoS" is used in different meanings, ranging from the users' perception of the service to a set of connection parameters necessary to achieve particular service quality. The QoS meaning changes, depending on the application field and on the scientific scope. Reference [Gozdecki03], starting from the terminology concerning QoS in IP networks, defines some reference points about the QoS issue. The authors, mentioning [Hardy01], identify three types of QoS: intrinsic, perceived and assessed. Intrinsic
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