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The IP Multimedia Subsystem (IMS) is a telecommunication middleware platform with robust service features that enables the delivery of a wide range of services to mobile network subscribers. Network operators are encouraged to develop services from service building blocks in order to avoid redundancies by re-using existing functionality. In this environment, operators must be able to control the service...
Defined by the 3rd Generation Partnership Project (3GPP) and forming by basic ones — Session Initiation Protocol(SIP) for session control and signaling, the IP Multimedia Subsystem(IMS) offers an perfect resolution for network integration and service expansion. This paper presents a novel achitecture model of multimedia conference system based on IMS network achitecture, which enables services to...
There is an increasing trend of accessing multimedia and web services embedded with Presence service over the mobile, which have driven the telecom operators to look for the new and better ways to provide such services. Presence service puts a lot of load on the IMS network and it can contribute 50% or more to the total signaling load which can increase end-to-end delay. In this paper we have analyzed...
IP Multimedia Subsystem (IMS) is a platform for service provisioning over IP networks, standardized by 3GPP. One of the key concepts of this technology is service enablers. Enablers are reusable modules encapsulating certain network functions, in order to simplify the development of new network services. In this paper, we present GroupManager, an enabler for group management that provides improved...
This document introduces PRISM, an application of multi-domain address book which provides a global and simple access point to communication and multimedia services independently of existing application silos. PRISM also enriches the address book with IMS based network services such as Extended Presence and Personal Data Synchronization which free the end users from devices constraints. As PRISM is...
Policy based resource management will form the cornerstone of service differentiation that will drive IMS service deployment. While the IMS specifications are largely finalized, the policy based QoS provisioning architecture still faces many deployment challenges including flexible, application driven policy control, end to end policy provisioning and policy refinement. To accelerate the maturity...
Radio frequency identification (RFID) technology is recently intensively investigated as an effective solution for the next generation communication services in business processes. In this paper we propose an RFID-based location tracking system for distributed offices based on session initiation protocol (SIP). The proposed system is compatible with EPCglobal standard, but extension with SIP at application...
The method for inter-working between UPnP home network and IMS network is proposed. All the UPnP enabled devices in the home network can access IMS network through an UPnP enabled home gateway. We present the architecture of the home gateway. The procedures of accessing IMS IPTV services for UPnP enabled devices are also given, including the device and service description of the home gateway with...
A new SIP event package called information-category is proposed based on the SIP event notification framework. With this event package an information sharing service is provided in IMS with SIP signaling. The end user could subscribe to interested information categories with SUBSCRIBE, get information from information sharing application server with NOTIFY, and post information with PUBLISH message...
With the introduction of IP-multimedia subsystem (IMS) based next generation networks (NGN) evolves the question of how to connect the NGNs together and with legacy communication networks. Currently some partially standardised proposals exist to enable these interconnections. All of these proposals have one fact in common: their dynamic expandability is inadequate in the face of the development of...
In this paper, we have designed and implemented the system architecture for extensible mobile instant messaging and presence service over the IMS. More specifically, we have implemented the SIP proxy servers for IMS P-CSCF and S-CSCF for the realization of extensible mobile instant messaging and presence service. The salient feature of the proposed system architecture is that the architecture is based...
In current 3GPP specifications initial filter criteria (iFC) and also the Shared iFC (SiFC) optimization (optional in the specs) are defined as part of the user service profile; This is linked to the user in order to allow forwarding of the initial received request to the proper Application Server (AS) running the required service logic. That approach considers that all service logic is performed...
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