Издательство John Wiley, 2009, -533 pp.The telecommunications industry is undergoing a fundamental change and the catalyst for this change is the business models and technologies of the Internet. The ubiquitous use of the Internet Protocol suite (IP) for voice, data, media and entertainment purposes, is driving the convergence of industries, services, networks and business models.
Network convergence is the route through which operators facilitate better access to end-user services and applications. IP provides a common foundation offering end-users seamless access to any service, any time, anywhere, and with any device. Full convergence is driven by enabling technologies such as HTTP/SIP, IPv6, VoIP, and the deployment of wireless broadband technologies such as WLAN, CDMA2000, and UMTS/HSPA.
The 3rd Generation Partnership Projects (3GPP and 3GPP2) have taken these developments into account whilst designing the IP-based Multimedia System (IMS). IMS is an overlay service provisioning platform through which telecommunications operators can utilise Internet technologies to their greatest advantage. It operates across fixed and mobile access technologies including WLAN, UMTS/HSPA, and DSL, along with many others. The telecommunications industry has high expectations for IMS. This technology offers the prospect of new value chains and business models for operators on the one side, and the increase of the end-user experience through converged and blended services on the other.
This book provides a comprehensive overview of the IMS architecture, its concepts and interfaces, and is an excellent quick reference for IMS practitioners. It tackles questions such as: How can services be implemented with IMS? What are the procedures involved? What do typical call-flows look like?
The authors are recognized contributors to the development and standardization of IMS and, with the first commercial deployments of IMS occurring in various countries, their effort and commitment is starting to pay off.Part I IMS Architecture and Concepts.
Introduction.
IP Multimedia Subsystem Architecture.
IMS Concepts.
Part II IMS Services.
Presence.
Group Management.
Push to Talk Over Cellular.
Messaging.
Conferencing.
Multimedia Telephony.
Part III Detailed Procedures.
Introduction to Detailed Procedures.
An Example of IMS Registration.
An Example IMS Multimedia Telephony Session.
An example IMS Voice Call Continuity Procedures.
