IP multimedia subsystem, network architecture, heteroge-neous wireless networks 1. INTRODUCTION The IP multimedia subsystem (IMS) is standardized by the 3rd generation partnership project (3GPP) and 3GPP2 as a new core network domain [1]. The IMS enables the provision of IP-based multimedia applications to mobile users, guar.
![Architecture Architecture](/uploads/1/2/5/5/125565677/783828109.jpg)
Provide your customers with Voice over LTE (VoLTE), Voice over WiFi (VoWiFi) and multimedia services while maintaining a profitable network. Allowing you to evolve towards an all-IP core, IMS is a high-performing core controller for LTE networks providing VoLTE, VoWiFi and multimedia services for multiple devices. IMS provides a standardized, future-proof network architecture with open interfaces, ensuring interoperability of multivendor equipment, combined with maximum reuse of existing network elements. The Nokia IMS-based product portfolio gives field-proven, efficient and robust voice and multimedia services with any access type – mobile, wire-line or cable. Maintain and expand business with IMS core.