Download e-book for kindle: Implementing Service Quality in IP Networks by Vilho Räisänen

By Vilho Räisänen

Whereas an increasing number of facts is shifted from circuit-switched to packet-switched networks, the clients of those networks anticipate a delicate, continually unproblematic provider (unrelated to the quantity of information transported). as a result, the reliability of a community in addition to the delight of its clients is based principally on caliber of provider (QoS). provider caliber via source administration in IP networks will make sure that enough assets can be found to fulfil the hold up of purposes and packet loss standards. This 12 months numerous books on QoS from the attitude of operators/engineers were released despite the fact that, none of those titles take on the administration aspect of the matter. This e-book exhibits the way to ensure caliber necessities of companies, it discusses and considers a number of the technique of allocating community assets and of supervising the provider caliber. additionally, it explores recommendations for allocating community assets and their relation to profit or operator application in addition to carrier allocation optimization. The e-book concludes with a Nokia case research that illustrates the formerly pointed out thoughts. crucial interpreting for networking pros wishing to appreciate carrier caliber administration in IP networks, in addition to scholars wanting to appreciate rules and simple suggestions of carrier caliber administration.

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Implementing Service Quality in IP Networks by Vilho Räisänen PDF

Whereas increasingly more info is shifted from circuit-switched to packet-switched networks, the clients of those networks count on a tender, consistently unproblematic carrier (unrelated to the quantity of information transported). accordingly, the reliability of a community in addition to the pride of its clients is predicated mostly on caliber of carrier (QoS).

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3. As will be discussed later, the network typically handles services in terms of service quality classes. Service Level Agreements and related technologies will be discussed in more detail in Chapter 6. 3 SERVICE QUALITY ESTIMATION The desirability of a customer having the means to verify service quality was referred to before. In addition to verification aspects, 24 SERVICE QUALITY REQUIREMENTS a meaningful definition of service quality in a SLA must be based on an understanding of how service quality is measured.

In the rest of the samples, different voice coding schemes may have been used; and some have been subjected to deliberate quality degradations such as packet losses. Obviously, the samples used in the listening test, as well as the nationality of listeners, as well as other cultural aspects, affect the result. Nevertheless, given the environmental factors, listening tests are the most reliable measures of real end user experience at the moment. Subjective tests yield reliable results, but require some effort and investment – most listeners expect at least a cola drink and a slice or two of pizza as a compensation for their investment of time into the experiment.

Some service event types require reliable delivery, whereas others can either tolerate missing PDUs or implement reliability on the service level. While the above list is in principle exhaustive, it turns out that a different kind of categorization is useful to properly address the needs of service level specifications for entire services. These are listed in the following. An important addition to “obvious” characteristics such as timeliness are availability requirements. While studying the categories, the reader is invited to consider what kind of issues may arise when specific services are implemented in multi-provider environment.

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