Open AccessBandwidth calculation for VoIP networks based on PSTN statistical model
Author(s) -
Zvezdan Stojanović,
Djordje Babić
Publication year - 2010
Publication title -
facta universitatis. series electronics and energetics/facta universitatis. series: electronics and energetics
Language(s) - English
Resource type - Journals
eISSN - 2217-5997
pISSN - 0353-3670
DOI - 10.2298/fuee1001073s
Subject(s) - computer science , voice over ip , dimensioning , erlang (programming language) , bandwidth (computing) , computer network , calculator , the internet , engineering , theoretical computer science , functional programming , aerospace engineering , operating system , world wide web
This paper shows an analysis how to calculate proper bandwidth for VoIP calls after proper dimensioning of PSTN network. For this purpose, we use Erlang B and extended Erlang B formulae. Further, we have developed a software tool, named Bandwidth Calculator to calculate proper number of the circuits on the PSTN side and after that IP bandwidth. Traffic analysis is conducted for VoIP networks considering impact of many factors on the bandwidth such as: voice codecs, samples, VAD, RTP compression. The results obtained by bandwidth calculator are compared to simulation results and data obtained by measurements. .