clustering / dispersion → overflow / time-outs clustering / dispersion → overflow / time-outs Trade-offs management: Delay ↔ Loss Trade-offs management: Delay ↔ Loss Introduction to VoIP

Project Goals  Implementation of VoIP CRN Model using  Executing and Performance studying

E-model MOS Kλ Delay Loss T Delay Network conditions Delay Loss Codec characteristics Equipment impairment Loss robustness R-Factor jitter buffer codec jitter buffer controller Voice Quality Jitter Buffer Network & Codec System’s Model

E-model MOS R-Factor jitter buffer codec jitter buffer controller Voice Quality Jitter Buffer Network & Codec CRN System’s Model CRN

E-model MOS Kλ Delay Loss T Delay Network conditions Delay Loss Codec characteristics Equipment impairment Loss robustness R-Factor jitter buffer codec jitter buffer controller Voice Quality Jitter Buffer Network & Codec CRN System’s Model C(t)

Spectrum opportunities

Network Simulator Performance Studying Scenarios generator MOS Channel State Simulator Adaptive Jitter Buffer Network simulator

Class Diagrams

Initial Results

C=10 MOS results (Network.type, participant.type, JBuffer.type) 4321 JBuffer participan t Networ k