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.

IP Telephony with H.323: Architectures for Unified Networks and Integrated Services

Abstract: From the Publisher: This book presents end-to-end system basics for IP telephony—the technology that enables private data networks to provide extended communication services and multimedia transmission over standard phone lines. Written by the chief architects of H.323, the governing protocol for IP telephony, this book delivers the most authoritative coverage of what is considered the hottest topic in networking today. Network and telecommunications professionals will find clear discussions of the principles and implementations of next generation architectures and services, as well as comprehensive coverage of the related protocols, addressing and routing issues, interworking IP with legacy systems, deploying gateways, and more. Mobility, security, and QoS aspects of H.323 systems are also explained in detail.

Challenges to Next Generation Services in IP Multimedia Subsystem

Abstract: The trend of Next Generation Networks’ (NGN) evolution is towards providing multiple and multimedia services to users through ubiquitous networks. The aim of IP Multimedia Subsystem (IMS) is to integrate mobile communication networks and computer networks. The IMS plays an important role in NGN services, which can be achieved by heterogeneous networks and different access technologies. IMS can be used to manage all service related issues such as Quality of Service (QoS), Charging, Access Control, User and Services Management. Nowadays, internet technology is changing with each passing day. New technologies yield new impact to IMS. In this paper, we perform a survey of IMS and discuss the different impacts of new technologies on IMS such as P2P, SCIM, Web Service and its security issues. Keywords—IP Multimedia Subsystems, Peer-to-Peer, Web Services, SCIM

IP device exchange apparatus and call connection changing method

Abstract: An IP device exchange apparatus includes: a connector that is connected to a first IP phone, a second IP phone, and a third IP phone; a memory for storing a coding scheme obtained by call setting which is negotiated between the first and second IP phones; and a controller that, when receiving a call instruction for call connection to the second IP phone from the third IP phone during communication between the first and second IP phones, employs the coding scheme stored in the memory to perform, between the third IP phone and the IP device exchange apparatus, call setting between the second and third IP phones, while maintaining call connection between the first and second IP phones, thereby changing the call connection between the first and second IP phones to call connection between the second and third IP phones.

An architecture for performance management of multimedia networks

Abstract: A principal requirement for multimedia networks is the ability to allocate resources to network services with different quality-of-service demands. The objectives of achieving efficient resource utilization, providing quality-of-service guarantees, and adapting to changes in traffic statistics make performance management for multimedia networks a challenging endeavor. In this paper, we address the following questions: what is the respective role of the real—time control system, the performance management system, and the network operator, and how do they interact in order to achieve performance management objectives? We introduce an architecture for performance management, which is based on the idea of controlling network performance by tuning the resource control tasks in the traffic control system. The architecture is built around the L-E model, a generic system-level abstraction of a resource control task. We use a cockpit metaphor to explain how a network operator interacts with the management system while pursuing management objectives.