IMS - 1 1 IMS Copyright R. H. M. Hafez 1996-2005 1 What is...

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Unformatted text preview: 1 1 IMS Copyright R. H. M. Hafez 1996-2005 1 What is it? IMS Components Session Initiated Protocol (SIP) Session Set-up Procedure Multimedia Resource Function Media Gateway Enabling IPv6 IMS Subsystem IMS = I P M ultimedia S ubsystem This section explain in some details this new domain called IP Multimedia Subsystem, and its associated signaling scheme known as Session Initiated Protocol SIP. IMS/SIP are defined in the 3GPP but they do apply to other IP- based networks and technologies. 2 2 IMS Copyright R. H. M. Hafez 1996-2005 2 MS UE Legacy Mobile Signaling Network Applications & Services Multimedia IP Network PSTN E-RAN UTRAN E-SGSN Other PLMN GGSN E-GGSN MRF E-HLR EIR SGW MGCF MGW SGSN CSCF Mm Gi Mc Gi Gi Gm Ms Mg Gc Gr Cx Mh Gn Gf Gp Um Uu Gn Iu-ps Iu-cs Signaling Data + Signaling The All-IP Model This is the vision of All-IP access. GTRAN will continue to support voice and UTRAN will support multimedia. The BSC will play a more significant role. It will be the main interface point to an all-IP networking. Since there are a lot more BSC's than MSCG's or GGSG's the work will be more distributed and fiber optics will play a significant role in transporting the wireless traffic in urban areas. 3 3 IMS Copyright R. H. M. Hafez 1996-2005 3 It is an International Standard defined by 3GPP/3GPP2 It defines a Generic Architecture for IP services. It takes care of: Establishing the connection Controlling the session Charging Integrating IP services Mobility CORE MRF SGW MGCF MGW CSCF A subsystem of servers, databases, codecs, algorithms and procedures to facilitate a range of IP services What is IMS IMS is the key technology that will enable a large array of flexible IP applications It is a system defined at the application level and constitute simplified signaling structure that support a new array of attractive applications. IMS uses the Session Initiated Protocol (SIP) to affect the connectivity. IMS allows various concurrent communication scenarios including: Person-to-Person, Group Interaction using voice, video , presentations .. Etc .. 4 4 IMS Copyright R. H. M. Hafez 1996-2005 4 IMS UMTS SIP SIP Terminal-to-Terminal IP connection Enabling IP Services Using IMS/SIP This slide illustrates the basic idea of the IMS/SIP system.This slide illustrates the basic idea of the IMS/SIP system....
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IMS - 1 1 IMS Copyright R. H. M. Hafez 1996-2005 1 What is...

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