IP Multimedia Research Articles

IMS – the IP Multimedia System as NGN Service Delivery Platform

This paper describes the IP Multimedia Subsystem (IMS), a Service Delivery Platform architecture for providing multimedia applications in converging fixed and mobile IP networks, called Next Generation Networks (NGN). It introduces the IMS architecture, which represents a combination of the classic Intelligent Network concept of the telecom world and current Internet protocols, and highlights the main IMS components and control features for the provision of multimedia information and communication services. Furthermore, the paper is focusing on the IMS Quality of Service (QoS) aspects defined within 3GPP IMS and ETSI TISPAN NGN.

RSVP extensions for real-time services in hierarchical mobile IPv6

The Mobile IPv6 (MIPv6) provides many great features, such as sufficient addressing space, mobility, and security; MIPv6 is one of the most important protocols for next generation mobile Internet. Simultaneously, with the rapid improvement of wireless technologies, the real-time multi-media IP services such as video on demand, videoconference, interactive games, IP telephony and video IP phone will be delivered in the near future. Thus, to furnish accurate QoS for real-time services is one of the most important thing in the next generation mobile Internet. Although RSVP, which is a resource reservation protocol, processes signaling messages to establish QoS paths between senders and receivers, RSVP was originally designed for stationary networks and not aware of the mobility of MNs. Therefore, this paper proposes a novel RSVP extension to support real-time services in Hierarchical Mobile IPv6 (HMIPv6) environments. For intra-site mobility, the concept of QoS Agent (QA) is proposed to handle the RSVP QoS update messages and provide the advanced reservation models for real-time services. For inter-site mobility, IP multicast can help to invite inter-site QAs to make pre-reservation and minimize the service disruption caused by re-routing the data path during handover. Simulation results show that the proposed scheme over HMIPv6 is more suitable for real-time services than the famous RSVP tunnel-based solution.

The INTERMIP project - a project for the traffic engineering and evaluation of multimedia IP networks

The INTERMIP project - a project for the traffic engineering and evaluation of multimedia IP networks