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3GPP / TISPAN IMS architectural overview 3GPP / TISPAN IMS architectural overview – HSS in IMS layer (as by standard) Each of the functions in the diagram is explained below. The IP multimedia core network subsystem is a collection of different functions, linked by standardized interfaces, which grouped form one IMS administrative network. [ 7 ]
The 3GPP/NGN IP Multimedia Subsystem (IMS) multimedia telephony service (MMTel) is a global standard based on the IMS, offering converged, fixed and mobile real-time multimedia communication using the media capabilities such as voice, real-time video, text, file transfer and sharing of pictures, audio and video clips. With MMTel, users have the ...
MM1 is the interface between a Mobile Station (MS) and an MMSC.. MM1 is used in the following actions: The sender subscriber sends an MMS to the MMSC; The MMSC notifies the recipient subscriber that they have an MMS waiting for retrieval
CAMEL Phase 1 defined only very basic call control services, but introduced the concept of a CAMEL Basic call state model (BCSM) to the Intelligent Network (IN). Phase 1 gave the gsmSCF the ability to bar calls (release the call prior to connection), allow a call to continue unchanged, or to modify a limited number of call parameters before allowing it to continue.
Having seen a little of what is IMS and the devices that act, we enter IMS specifications relating to security. From the point of view of the standardization, only exists a mechanism of authentication and access control, specified in the TS 33.203 of 3GPP (Access Security for IP-Based Services) and commonly called AKA (Authentication and Key Agreement).
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to do an attachment file transfer; to do some photo sharing (e.g., Image Share) based on prior exchange of capabilities between the user endpoints; MSRP session is set up through SIP's offer-answer [3] model. The SDP m-line media type is message and the protocol is either TCP/MSRP for MSRP over TCP and TCP/TLS/MSRP for MSRP over secure TLS.
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