Framework for VoIP in IP-based Wireless Heterogeneous Networks
Signaling, Mobility, Security

The focus of this book is on mechanisms that affect the VoIP user satisfaction while not explicitly involved in the media session. The book thus investigates and proposes cross-layer techniques for realizing time-efficient control mechanisms for VoIP.

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.

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.