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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
The convergence of different types of traffic has preceded the convergence of systems and services in a wireless heterogeneous network. Voice and data traffic are usually treated separately in both 2G and 2.5G wireless networks. With advances in packet switching technology and especially with the deployment of wireless heterogeneous systems, both speech and data traffic are carried over wireless links by the same IP-based packet-switched infrastructure. However, this combination faces some challenges due to the inherent properties of the wireless network. 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 while not 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.
Content Level »Research
Keywords »3rd Generation Wireless Systems - GPRS - IEEE 80 - IPv6 - Internet Protocol (IP) - Internet Protocol Version 6 (IPv6) - Mobility - RSA - Security - Signalling - UMTS - Universal Mobile Telecommunications System - VoIP - Voice over IP (VOIP) - Wireless Heterogeneous Networks
About Authors. Acknowledgements. Preface. 1 Introduction. 1.1 Quality of Experience: Signalling, Mobility and Security. 1.2 Challenges due to the Wireless Link. 1.3 Book Outline. References. 2 IP-based Wireless Heterogeneous Networks. 2.1 Introduction. 2.2 IEEE 802.11 Wireless Local Area Networks. 2.3 IEEE 802.16 Wireless Metropolitan Area Networks. 2.4 3GPP Cellular Systems. 2.5 Integration of WLAN, WMAN and GPRS/UMTS. 2.6 The IP-based Multimedia Subsystem. References. 3 Voice over Internet Protocol. 3.1 Requirements. 3.2 Media Session. 3.3 Signalling Protocols for VoIP. 3.4 VoIP Session Setup in the IMS. References. 4 Models for Performance Analysis in Wireless Networks. 4.1 Introduction. 4.2 Analytical Model for Random Error Process. 4.3 Analytical Model for Correlated Error Process. References. 5 Impact of Security on Real-time Services: Link Layer Authentication Delay in WLAN 802.11b. 5.1 Introduction. 5.2 Security Properties. 5.3 Cryptographic Primitives. 5.4 WLAN 802.11b Security. 5.5 Security Analysis of Link Layer Authentication Protocols. 5.6 Link Layer Authentication Delay Analysis. 5.7 Evaluation of Link Layer Authentication Delay. 5.8 Concluding remarks. References. 6 Impact of Signalling on Real-time Services: SIP Session Setup Delay. 6.1 Introduction. 6.2 SIP Reliability Mechanisms. 6.3 Session Setup Delay. 6.4 Evaluation of SIP Session Setup Delay over Random Error Channels. 6.5 Evaluation of SIP Session Setup Delay over Correlated Fading Channels. 6.6 Optimization of SIP Session Setup Delay. 6.7 Concluding remarks. References. 7 Impact of Mobility on Real-time Services: Handover Delay. 7.1 Introduction. 7.2 Network Layer Mobility Protocols. 7.3 Reliability Mechanisms for Mobile IP-based Protocols. 7.4 Analysis and Optimization of Handover Delay for MIP-based Protocols. 7.5 Results of Handover Delay. 7.6 Concluding remarks.References. 8 Coupling Mobility and Security. 8.1 Introduction. 8.2 Mobile IPv6 Security. 8.3 Leakage-Resilient Authenticated Key Establishment Protocol based on RSA. 8.4 Leakage-Resilient Security Architecture proposal for MIPv6. 8.5 Analysis of Handover Delay for Proposed Architecture. 8.6 Security Analysis. 8.7 Results for Handover Delay. 8.8 Concluding remarks. References. 9 Towards Quality of Experience and Future Perspectives. 9.1 Towards Quality of Experience. 9.2 Future Perspectives. References. Index.