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.

NGN architecture: generic principles, functional architecture, and implementation

Abstract: This article summarizes the architectural aspects of a next-generation network in terms of general principles, functional representation, and typical implementation. According to the general reference model, which assumes decoupling of services and transport, NGN can be represented by multiple functional groups. One of the key implementations for session-based services, utilizing an IP multimedia subsystem, is introduced with enhanced features to meet both fixed and mobile network requirements.

Secure access method, and associated apparatus, for accessing a private IP network

Abstract: A method, and associated apparatus, for accessing a private IP network with a wireless host by way of a wireless access network. Once authenticated and permitted access to the private IP network, the wireless host becomes a virtual host of the private IP network. A wireless host identifier (WHI) is used to identify the wireless host. Permission to communicate by way of wireless access network is confirmed by an authentication procedure. The WHI is thereafter provided to the private IP network. If the WHI is of a selected value, permission to access the private IP network is granted. An IP address used to address data to the wireless host is allocated by the private IP network once access to the private IP network is granted.

Universal multimedia access device

Abstract: A universal multimedia access apparatus for accessing any of a plurality of multimedia applications provided by a multimedia network. The universal multimedia access apparatus accesses a predetermined one of the plurality of multimedia applications using an application-specific module interfaced thereto, the application-specific module being selected from a plurality of application-specific modules. The universal multimedia access apparatus comprises a transceiver and a processing unit. The transceiver communicates multimedia information between the multimedia network and the application-specific module, and communicates with the multimedia network in any one of a plurality of communication modes. The processing unit is operative to identify the application-specific module interfaced thereto and the predetermined one of the plurality of multimedia applications associated with the application-specific module, and operative to command the transceiver to communicate with the multimedia network in a mode associated with the predetermined one of the plurality of multimedia applications.

USER EQUIPMENT DEVICE ENABLED FOR SIP SIGNALLING TO PROVIDE MULTIMEDIA SERVICES WITH QoS

Abstract: A user equipment (UE) device (11) including a mobile terminal (MT) (11b 11b') coupled to a terminal equipment (TE) device (11a) including an IP Multimedia Subsystem (IMS) proxy adjunct (P+) for use by the TE (11a) in making multimedia service requests for IP communications with a desired end-to-end QoS, the end-to-end including the local connection and a network supporting QoS, e.g. an UMTS network (12) having as an extension of its packet-switched core network (12b) an IMS (12c) providing multimedia services with selected QoS. The IMS proxy adjunct (P+) is implemented to make extensions to messages according to any protocol providing a session description protocol (SDP) component, such as SIP or RTSP, so as to ensure the selected QoS. In addition, a mechanism is provided by which the MT (11b') informs the IMS (12c) when it has IMS proxy capabilities.

Traffic Analysis and Design of Wireless IP Networks

Abstract: Introduction. Third Generation Wireless Mobile Communications and Beyond. Wireless Mobile Internet. Teletraffic Theory. Characterization and Classification of IP Traffic. Architecture for Mobile IP Networks with Multiple Traffic Classes. Analytical Analysis of Multimedia Mobile Networks. Admission Control Algorithm with QoS Support in Mobile IP Networks with Multiple Traffic Classes. Performance Analysis of a Cellular IP Network. Handover Agents for QoS Support. QoS Provisioning in Wireless IP Networks Through Class-Based Flexible Fair Queuing. Conclusions.