Voice over IP in wireless heterogeneous networks

The requirements for good quality VoIP communications are difficult to achieve in a time-varying environment due to channel errors and traffic congestion and across different systems. The provision of VoIP in wireless heterogeneous networks requires a set of time-efficient control mechanisms to support a VoIP session with acceptable quality. The focus of Voice over IP in Wireless Heterogeneous Networks is on mechanisms that affect the VoIP user satisfaction whilenot explicitly involved in the media session. This relates to the extra delays introduced by the security and the signaling protocols used to set up an authorized VoIP session and to the disruption caused by the user mobility during the session. Voice over IP in Wireless Heterogeneous Networks thus investigates and proposes cross-layer techniques for realizing time-efficient control mechanisms for VoIP: signaling, mobility and security Comprehensive overview of wireless heterogeneous networks, and of VoIP protocols Taking a cross-layer approach to control mechanisms: signalling, mobility, and security A solid analytical framework for delay analysis for VoIP Extensive Results for delays generated by signalling, mobility and security Mapping future directions for wireless multimedia communications INDICE: About Authors. Acknowledgements. Preface. Acronyms. 1 Introduction. 2 IP-basedWireless Heterogeneous Networks. 3 Voice over Internet Protocol. 4Models for Performance Analysis in Wireless Networks. 5 Impact of Security onReal-time Services: Link Layer Authentication Delay in WLAN 802.11b. 6 Impactof Signalling on Real-time Services: SIP Session Setup Delay. 7 Impact of Mobility on Real-time Services: Handover Delay. 8 Coupling Mobility and Security.9 Towards Quality of Experience and Future Perspectives.

• ISBN: 978-1-4020-6630-6
• Editorial: Springer
• Encuadernacion: Cartoné
• Páginas: 300
• Fecha Publicación: 01/10/2008
• Nº Volúmenes: 1
• Idioma: Inglés