The IPMultimedia
Subsystem (IMS) is an IP multimedia and telephony
core network that is defined by 3GPP and 3GPP2
standards and organizations based on IETF Internet
protocols. IMS is access independent as it supports IP to IP session over
wireline IP, 802.11, 802.15, CDMA,
packet data along with GSM/EDGE/UMTS and other packet
data applications. IMS is a standardized reference
architecture that consists of session control,
connection control and an applications services
framework along with subscriber and services data. *
