IMS is defined by 3GPP/3GPP2 as a new core and service 'domain' that enables the convergence of data, speech and network technology over an IP-based infrastructure. It is the operator choice of control and service logic for primarily IP/packet-based person-to-person communication but also for person-to-content communication.
For users, IMS-based services will enable communications in a variety of modes – including voice, text, pictures and video, or any combination of these – in a highly personalized and secure way.
IMS is designed to fill the gap between the existing traditional telecommunications technology and internet technology that increased bandwidth alone does not provide. This allows operators to offer new, innovative services that shareholders and end users are expecting.