Application-Aware Design to Enhance System Efficiency for VoIP Services in BWA Networks

• Published in: IEEE transactions on multimedia Vol. 13; no. 1; pp. 143 - 154
• Main Authors: OH, Sung-Min, KIM, Jae-Hyun
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.02.2011; Institute of Electrical and Electronics Engineers
• Subjects: Acoustics; Applied sciences; Bandwidth; Computer science; control theory; systems; Computer systems and distributed systems. User interface; Cross-layer framework; dynamic resource request; Exact sciences and technology; Fundamental areas of phenomenology (including applications); IEEE 802.16 Standards; Mesons; Physics; Protocols; Quality of service; resource efficiency; Software; Speech codecs; Transduction; acoustical devices for the generation and reproduction of sound; voice over Internet protocol (VoIP) service; Wireless communication; Polling; Internet protocol; Cross-layer framework; Resource allocation; Transmission protocol; Web service; Voiced signal; Duration; Real time; Service time; resource efficiency; Codec; Silence; Audio acoustics; Wireless network; Service quality; Voice; dynamic resource request; voice over Internet protocol (VoIP) service
• ISSN: 1520-9210; 1941-0077
• DOI: 10.1109/TMM.2010.2093512

This paper has designed a cross-layer framework for voice over Internet protocol (VoIP) services in IEEE 802.16 systems. It uses the application session information of the session description protocol to generate the quality of service parameters in IEEE 802.16 systems. This feature allows the system to efficiently allocate the radio resource because it can exactly estimate the properties of VoIP services such as packet-size and packet-generation-interval. In other words, the cross-layer framework is expected to achieve a novel resource request scheme for a VoIP service that dynamically assigns the radio resource. This paper has analyzed the maximum number of supportable VoIP users for the resource request schemes in terms of the packet-generation-interval in the silent-period, the duration of the silent-period, and the major VoIP speech codec. The numerical results show that the proposed scheme can efficiently support the VoIP services for the various communication environments. Particularly, it can improve the maximum number of supportable VoIP users by 14 ~ 93% compared to an extended real-time polling service.