An adaptive IP telephony application over Differentiated Services

Author

Scheidegger, Matthias ; Braun, Torsten

Author_Institution

Dept. of Comput. Networks & Distributed Syst., Bern Univ., Switzerland

fYear

2002

fDate

2002

Firstpage

361

Lastpage

368

Abstract

This paper describes a concept based on application adaptivity and Differentiated Services (DiffServ) in order to provide the quality-of-service (QoS) required by real-time applications. Assuming the availability of different service classes, we propose that a real-time application always selects the lowest/cheapest service class that still can meet the application requirements. The selection depends on RTP-based QoS monitoring and on additional probing of the quality of the next lower service class. The service class selection algorithm has been implemented within an IP telephony application and evaluated in a test-bed consisting of Linux-PC based DiffServ routers. The evaluation proves the suitability of the approach but also shows several issues for further improvement

Keywords

Internet telephony; performance evaluation; quality of service; telecommunication network routing; DiffServ routers; Differentiated Services; Linux PC; QoS; RTP-based monitoring; adaptive IP telephony; evaluation; quality of service; real-time applications; service class selection algorithm; Application software; Computer networks; Costs; Diffserv networks; Feedback; Monitoring; Quality of service; Switches; Telecommunication traffic; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Performance, Computing, and Communications Conference, 2002. 21st IEEE International

Conference_Location

Phoenix, AZ

Print_ISBN

0-7803-7371-5

Type

conf

DOI

10.1109/IPCCC.2002.995171

Filename

995171