On the deployment of VoIP in Ethernet networks: methodology and case study
Computer Communications
Management of service level agreements for multimedia Internet service using a utility model
IEEE Communications Magazine
Implementing VoIP: a voice transmission performance progress report
IEEE Communications Magazine
The IMS service platform: a solution for next-generation network operators to be more than bit pipes
IEEE Communications Magazine
Approximation techniques for computing packet loss in finite-buffered voice multiplexers
IEEE Journal on Selected Areas in Communications
Loss performance analysis of an ATM multiplexer loaded with high-speed on-off sources
IEEE Journal on Selected Areas in Communications
IEEE Journal on Selected Areas in Communications
Characterizing Superposition Arrival Processes in Packet Multiplexers for Voice and Data
IEEE Journal on Selected Areas in Communications
Models for Analysis of Packet Voice Communications Systems
IEEE Journal on Selected Areas in Communications
Equivalent capacity and its application to bandwidth allocation in high-speed networks
IEEE Journal on Selected Areas in Communications
A survey of packet loss recovery techniques for streaming audio
IEEE Network: The Magazine of Global Internetworking
Traffic engineering with MPLS in the Internet
IEEE Network: The Magazine of Global Internetworking
NTMS'09 Proceedings of the 3rd international conference on New technologies, mobility and security
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Modern VoIP codecs like G.729, G.723.1 or AMR can generate traffic during voice inactivity periods for Comfort Noise Generation (CNG). This feature alters the classical on-off pattern typically used to model the traffic generated by codecs with a Silence Suppression scheme. Therefore, the traffic generated due to CNG leads to severe inaccuracies in the dimensioning analysis done through traditional models based on multiplexing on-off sources like MMPP or fluid model. This paper addresses the VoIP dimensioning issue. First, we extend the traditional MMPP and fluid analytical models to include those traffic sources which perform the CNG feature. Second, we propose a simple but efficient algorithm which can be applied in dimensioning or admission control to find out the bandwidth reservation required to guarantee delay and loss in a packet-switch multiplexer node for VoIP traffic. Results are validated by simulations and VoIP traces and demonstrate a significant improvement in accuracy with respect to current on-off-based approaches.