The path to IMS : evolution of the cellular switching system to 3G -- Standards organizations for the IMS -- The IMS control plane -- The IMS bearer plane -- The IMS application plane -- Security -- Charging -- User equipment and IMS -- What's in a name : identitifiers in IP networks -- Overview of session initiation protocol (SIP) -- Session description protocol -- XML configuration access protocol -- Message session relay protocol -- Diameter -- Presence -- XML document management server -- Push-to-talk over cellular -- IP messaging -- IMS ecosystem -- Consumer market use cases -- Business market use cases -- Converged market use cases.