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...