Towards scalable end-to-end QoS provision for VoIP applications
Towards scalable end-to-end QoS provision for VoIP applications
- Author(s): R. El-Haddadeh ; G.A. Taylor ; S.J. Watts
- DOI: 10.1049/ic:20040029
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- Author(s): R. El-Haddadeh ; G.A. Taylor ; S.J. Watts Source: Telecommunications Quality of Service: The Business of Success (QoS 2004), 2004 p. 132 – 135
- Conference: Telecommunications Quality of Service: The Business of Success (QoS 2004)
- DOI: 10.1049/ic:20040029
- ISBN: 0 86341 393 5
- Location: London, UK
- Conference date: 2-3 March 2004
- Format: PDF
The growth of the Internet and the development of its new applications have increased the demand for providing a certain level of resource assurance and service support. The concept of ensuring quality of service (QoS) has been introduced in order to provide the support and assurance for these services. Different QoS mechanisms, such as integrated services (IntServ) and differentiated services (DiffServ), have been developed and introduced to provide different levels of QoS provision. However, IntServ can suffer from scalability issues that make it infeasible for large-scale network implementations. On the other hand, the aggregated-based per-flow technique of DiffServ does not provide such an end-to-end QoS guarantee. Recently, the IETF have proposed a new QoS architecture that implements IntServ over DiffServ in order to provide an end-to-end QoS for scalable networks. Hence, it became possible to provide and support a certain level of QoS for some delay sensitive and bandwidth-demanding applications such as voice over Internet Protocol (VoIP). With regard to VoIP applications, delay, jitter and packet loss are crucial issues that have to be taken into consideration for any VoIP system design and such parameters need a distinct level of QoS support.
Inspec keywords: delays; jitter; integrated voice/data communication; Internet telephony; quality of service
Subjects: Other computer networks; Computer communications; Telephony
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