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Telepresence: Immersive Experience and Interoperability
Published in Hassnaa Moustafa, Sherali Zeadally, Media Networks: Architectures, Applications, and Standards, 2016
IMS stands for IP Multimedia core network Subsystem, a concept developed and specified by the 3GPP. The original aim of 3GPP was to specify a SIP-based multimedia architecture, enabling mobile operators to control usage of IP transport resources in their packet switched domain based on the general packet-radio service (GPRS) and offer value-added services. Since then, the IMS has gained tremendous momentum as THE carrier-grade architecture based on SIP. The rapid spread of fixed-broadband access and the obsolescence of TDM switching equipment, combined with the sustained interest in fixed and mobile convergence have made IMS increasingly relevant to fixed operators as well. The latest versions of the IMS specifications include all extensions required to make them truly suitable for use in both mobile and fixed (wireline) environments.
Evolution of the Cellular Telephony Networks
Published in Giovanni Bartolomeo, Tatiana Kováčiková, Identification and Management of Distributed Data: NGN, Content-Centric Networks and the Web, 2016
Giovanni Bartolomeo, Tatiana Kováčiková
The core IMS functions are included in the CSCF, which is an SIP server processing the IMS signaling traffic to control multimedia sessions. There are three types of CSCFs: Proxy CSCF (P-CSCF): The initial point of contact for signaling traffic in to the IMS. A user is allocated P-CSCF as a part of the registration process and provides a two-way IPsec association with the user; all signaling traffic traverses P-CSCF for the duration of the session.Serving CSCF (S-CSCF): Provides the service coordination logic to invoke and orchestrate the application servers needed to deliver the requested service. S-CSCF interacts with the HSS to determine user service eligibility by downloading the user profile; the S-CSCF is allocated for the duration of the registration.Interrogating CSCF (I-CSCF): An SIP proxy that provides a gateway to other domains, such as other service provider networks. I-CSCF may encrypt sensitive domain information, a function referred to as a Topology Hiding Internetwork Gateway (THIG), before forwarding the traffic.
Broadcasting Mobile Multimedia Using WiMAX-Network Architectures
Published in Amitabh Kumar, Mobile Broadcasting with WiMAX: Principles, Technology, and Applications, 2014
IP Multimedia System (IMS) is a generic architecture model for offering VoIP and multimedia services over a diverse range of networks. IMS is a 3GPP and 3GPP2 standard and is almost universally followed in the implementation of all mobile networks where the use of IMS services such as push to talk, instant messaging, or VoIP using SIP are required. The use of IMS is, however, not limited to use only on the cellular mobile networks. The standard supports multiple access networks including wireline networks, wireless LANS, GSM, 3G-UMTS, or CDMA 2000 networks. The 3GPP2 which evolved the multimedia domain (MMD) has also based its work on the 3GPP IMS structure. IMS has also been adopted by other standards bodies such as ETSI and TISPAN (Telecoms & Internet converged Services & Protocols for Advanced Networks). TISPAN has provided the specifications for DSL access, and work on cable access is in progress in cooperation with Cablelabs®. IMS as per Releases 6 and 7 of the 3GPP includes support of WLANs, WiMAX, DSL, Broadband Cable, and enterprise level T1/E1 (1.5/2 Mbps) links. This sets the stage for a multiple access, multiple services network to be offered by using the IMS.
The Internet of Things for Logistics: Perspectives, Application Review, and Challenges
Published in IETE Technical Review, 2022
Hoa Tran-Dang, Nicolas Krommenacker, Patrick Charpentier, Dong-Seong Kim
The last feature of smart network is convergence, which implies the capability of networks in processing all type of heterogeneous IoT data represented in four main forms: text, audio, image, video. Such ability enables the IoT-system to be interoperable, thus supporting providing ubiquitous service and applications. Recently, the next-generation networks develop an IP multimedia subsystem, which is a standardized platform for the delivery of multimedia services for the IoT systems [146–148]. The practical applications adopt such a platform to integrate the IMS in WSNs [149] or wireless actuator networks [150] for offering context-aware services.
Security challenges in the transition to 4G mobile systems in developing countries
Published in Cogent Engineering, 2023
Fanuel Melak Asmare, Lijaddis Getnet Ayalew
Figure 4 depicts a comprehensive summary of the classification of attacks on the LTE network based on its network framework. Significant attack types have been illustrated in the access network, core network, IP Multimedia Subsystem (IMS), and user equipment. These attacks infiltrate and cause harm by utilizing various parts of the network infrastructure and methods. And the infiltration is made possible by many weak points in the interaction between LTE network entities.