Topic
IP Multimedia Subsystem
About: IP Multimedia Subsystem is a research topic. Over the lifetime, 4398 publications have been published within this topic receiving 43698 citations.
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TL;DR: The Lucent Datagrid™ software provides a telecom-targeted data integration capability, so that applications can use a logical “single-point-of-access” for user profile information inside a service provider's network.
Abstract: Next-generation communication services will be driven by increasingly rich and distributed subscriber information. Current wireless networks have evolved such that subscriber information now resides in various elements e.g., home location register [HLR], prepay, voice mail, short message, and location determination systems). Convergence with the Internet promises significantly more personal information, such as presence, calendars, address books, buddy lists, pictures, and video. The home subscriber server (HSS) in the IP Multimedia Subsystem (IMS) architecture provides centralized storage for subscriber data. However, some application servers will also have their own subscriber data. As the quantity and variety of applications grow, it will become increasingly useful to provide unified views of subscriber data both within a network and across networks. The Lucent Datagrid™ software provides a telecom-targeted data integration capability, so that applications can use a logical “single-point-of-access” for user profile information inside a service provider's network.
11 citations
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TL;DR: The proposed RGW architecture is also flexible enough so as to adapt the QoS management mechanism to different possible scenarios, e.g. configured by the provider, by the customer or even autoconfigured by the RGW itself.
Abstract: The TISPAN workgroup inside ETSI is currently working on accommodating the IMS (IP Multimedia Subsystem) architecture, which has been created for the mobile world, to the fixed scenario where there is a new important element to be taken into account: the Residential Gateway (RGW). This element is typically considered as a customer device where providers do not usually have anything to configure. However, in order to achieve real end-to-end Quality of Service (QoS) this cannot be true anymore.
This paper focuses on the way that a RGW is capable of configuring itself (an interface with the providers is also available), regarding Quality of Service parameters, into a Next Generation Network (NGN) scenario. The proposed RGW architecture is also flexible enough so as to adapt the QoS management mechanism to different possible scenarios, e.g. configured by the provider, by the customer or even autoconfigured by the RGW itself. A specific scenario, where a RGW is deployed in the TISPAN NGN architecture, will be explained and validated to proof the concept of the RGW architecture.
11 citations
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01 Nov 2008TL;DR: This paper introduces IMS (IP Multimedia Subsystem) and then looks at implementation agreements, methods and protocols for transport of voice over MPLS (multi protocol label switching) networks.
Abstract: In this paper, we discuss currently evolving technologies for packet based real-time voice communication Packet based voice has gained popularity in the toll-quality market due to its flexibility and cost effectiveness IMS (IP Multimedia Subsystem) is being developed for converged voice and data services While initially it was intended for mobile networks, it has been expanded to include support for fixed networks In the wired network, the quality of service needed for media traffic can be provided by MPLS and related protocols The traffic engineering and quality of service mechanisms of MPLS and Diffserv allow the differential treatment of premium traffic on predefined LSPs (Label Switched Path) Recently T-MPLS has been introduced as the transport network for connection oriented packet switched traffic, dropping some of the MPLS features that were irrelevant for connection oriented applications We introduce IMS and then look at implementation agreements, methods and protocols for transport of voice over MPLS (multi protocol label switching) networks
11 citations
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17 Jan 2006TL;DR: In this paper, a SIP Gateway coupled to an IP Multimedia Subsystem (IMS) is disclosed that detects when a first party, using a plain Ordinary Telephone Service (POTS) telephone coupled to the SIPGW and participating in a call, performs a hook flash action.
Abstract: A SIP Gateway (SIPGW) coupled to an IP Multimedia Subsystem (IMS) is disclosed that detects when a first party, using a Plain Ordinary Telephone Service (POTS) telephone coupled to the SIPGW and participating in a call, performs a hook flash action In response, the SIPGW sends to the IMS a first SIP INFO message indicating that the POTS telephone has performed the hook flash In response to a first SIP INFO message indicating that a first party has performed a first hook flash, an Application Server (AS) in an IMS places on hold a second party participating in the call The AS may also cause a Media Server to receive information from the first party identifying a call feature to be provided, where the call feature is one of simple call hold, consultation call hold, attended call transfer and unattended call transfer
11 citations
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TL;DR: Fast emerging IP Multimedia Subsystem popularly known as IMS is all set to fulfill the above promises if present day developments are any indications.
Abstract: MUL TIMED lA applications and streaming are already being delivered over the Wire line and Wireless networks. Video conferencing has been in vogue for quite some time now. But the question is how are they delivered? What are Capex and Opex implications for the network operator? How simple are the networks and their management for provisioning these services. Are there technological ways that could bring operational efficiencies to the operators that would provide consistency in the growth of the bottomline and top-line in a fiercely competitive market environment? Fast emerging IP Multimedia Subsystem popularly known as IMS is all set to fulfill the above promises if present day developments are any indications.
11 citations