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.

Architectures for personalized multimedia

Abstract: Personalized multimedia on-demand services are fast evolving from a symbiosis of storage, network, and content providers. A major obstacle to their practical realization is the unprecedented cost of storage and transmission. Architectures and caching techniques can minimize the costs of delivering personalized multimedia programs across metropolitan networks. >

Packet filtering/classification and/or policy control support from both visited and home networks

Abstract: A method of supporting access to a selected Internet Protocol (IP) multimedia application via an IP Multimedia Subsystem (IMS) is provided for a roaming mobile node (MN) - i.e., user equipment (UE) (10) - served by a wireless telecommunications system. The method includes: establishing a first IP tunnel (20) between the UE (10) and a local access gateway (30) of a visited network in which the UE (10) is roaming, the first tunnel (20) being anchored at the local access gateway (30); establishing a second IP tunnel (22') between the UE (10) and a home gateway (40') of a home network to which the UE (10) belongs, the second tunnel (22') being anchored at the home gateway (40'); receiving data packets at the local access gateway (30) for the UE (10); filtering the packets received at the local access gateway (30) to suitably classify corresponding traffic into one of a plurality of data flows (20a, 20b,... 20n) supported within the first tunnel (20) at varying Quality of Service (QoS) levels; receiving data packets at the home gateway (40') for the UE (10); and, filtering the packets received at the home gateway (40') to suitably classify corresponding traffic into one of a plurality of data flows (22a, 22b,... 22n) supported within the second tunnel (22') at varying QoS levels.

Roaming support for wireless access subscriber over fixed ip access networks

Abstract: The claimed subject matter provides for systems and methods that facilitate a transfer of a portion of a service-level policy agreement associated with a home wireless access network to a fixed internet protocol (IP) access network. An authentication component can authenticate a subscription of a multi-mode device across different network architectures. A policy component can provide at least a portion of a service-level policy agreement to enable or disable services or policies associated with a multi-mode device at the fixed IP access network on a per session basis.

Adaptive network support for mobile multimedia

Abstract: . Owing to widespread user mobility, limited radio resources, and changing network characteristics. supporting multimedia communications in a mobile intemetworking environment is a challenging problem. In this paper; we present an “adaptive reserved service” framework for use in integrated services networks to support mobile connections carrying multimedia traffic. Reserved bandwidth in the fixed network is dynamically adjusted based on resource availability in the wireless network. Integrated in the framework are an anticipatory handoff control mechanism which enables .fast hand08 and an adaptive link partitioning scheme which enhances hand08 success. An accompanying reservation protocol not only facilitates distributed control of mobile connections but also provides network feedback to mobile hosts,