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2008 international conference on High Performance Computing, Networking and Communication Systems, HPCNCS 2008

作者： Kumar, Dhananjay Nithya, S. Karthik, M. Sathish, R. Department of Information Technology MIT Campus Anna University India

ISBN: (纸本)9781615677177

Session setup time is a critical factor when it comes to multimedia applications, such as instant messaging and Voice over ip (Voip). Some of the factors that affect the session setup delay are length of Sip messages, bandwidth and packet loss in the wireless link. This paper aims at reducing the session setup delay in UMTS ip multimedia subsystem. We propose compression of Sip header by Text-based Compressing using Cache and Blank (TCCB) approach and a caching scheme. In caching scheme, during registration, the address of Serving Call Session Control Function (S-CSCF) of mobile users are cached at Interrogating - CSCF (I-CSCF). Typically, it takes 300ms to find the address of called mobile user's Serving CSCF and it can be minimized using cache. A simulation has been carried out to analyze the effect of Sip header compression and caching scheme. The result shows that for a 9.6 Kbps channel, a reduction of 25% is possible and for 19.2Kbps channel 19% reduction can be achieved.

关键词： Voice/data communication systems

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Supporting ubiquitous IMS-based teleconferencing through discovery and composition of IMS and web components

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JOURNAL OF NETWORK AND SYSTEMS MANAGEMENT 2008年第1期16卷 92-112页

作者： Doolin, Kevin Mullins, Robert Abad, Rafael Moron Moreno, Marta Garcia Mota, Telma Farshchian, Babak A. Gomez, Miguel Waterford Inst Technol Telecommun Software & Syst Grp TSSG Waterford Ireland Parque Tecnol Boecillo Valladolid Spain Portugal Telecom Inovacao P-3810 Aveiro Portugal Telenor R&I N-7004 Trondheim Norway Agora Syst SA Madrid Spain

Natural communication among people happens in flexible ways and is strongly affected by the users' situation (such as communication tools available, user's location, and user's preferences). This situation or context information is seldom used to initiate communication sessions among users. Current communication systems are indifferent about users' context, often require time consuming manual configurations and often result in conferencing tools not being easily accessible when needed. This leads to lower adoption of innovative communications services. IMS Sip (ip multimedia subsystem, Session Initiation Protocol) sessions allow users to access the session from different points of contact (home, office, etc.), however, IMS still requires a prior knowledge of all Sip components that might be used in a Sip session. Furthermore, IMS makes limited use of context information (mainly user-defined availability). To address these issues our research approach combines techniques from pervasive computing with IMS networking principles to facilitate compositions of communication sessions based on users' context. We propose a platform and APIs for pervasive application development support to allow greater intelligence in IMS applications. We additionally provide mechanisms for IMS applications to apply their intelligence to the configuration of physical devices and web resources used to set up a conference. The innovations proposed in this paper are: (1) A new standard for intelligent IMS-based conferencing applications. (2) Application Development Interfaces (APIs) for a platform for pervasive computing. (3) An architecture for a pervasive IMS platform.

关键词： pervasive computing ubiquitous computing IMS service composition multimedia

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Analysis of Sip messaging on ip multimedia subsystem network

Analysis of SIP messaging on IP multimedia subsystem network

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5th international conference on Information Technology and applications, ICITA 2008

作者： Singh, Gurpal Singla, Rajni Bajwa, Gurpreet Singh Sohi, B.S. CSE and IT Deptt. BBSBEC Fatehgarh Sahib Punjab India Infosys Bangalore India Department of CSE and IT BBSBEC Fatehgarh Sahib Punjab India UIET Panjab University Chandigarh Punjab India

ISBN: (纸本)9780980326727

IMS is converged telecommunications architecture for merging cellular and Internet technologies for delivery of voice, vi deo, and data on a single network, envisioned by the 3rd Generation Partnership Project's (3GPP). It moots the usage of the Internet Engineering Task Force (IETF) *** Session Initiation Protocol (Sip) signaling and Session Description Protocol (SDP) for managing multimedia applications over 3G networks. This paper is based on impact of Sip messaging on the IMS core network. Present work concludes that though Sip over IMS provides more options and QOS features to the user but it results in increased signaling traffic and call set up latency as compared to the Simple Sip (Non-IMS). This work has been evaluated over experimental testbed consisting of IMS lab setup and open source software tools.

关键词： Open source software

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Service Concentration Node in Internet multimedia subsystem (IMS)

Service Concentration Node in Internet Multimedia Subsystem ...

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8th international conference on Next Generation Teletraffic and Wired/Wireless Advanced Networking/1st Russian conference on Smart Spaces

作者： Gozupek, Didem Sever, Aziz Bogazici Univ Dept Comp Engn Istanbul Turkey Argela Technol Istanbul Turkey

ISBN: (纸本)9783540854999

Convergence of the cellular world to an all-ip domain has stimulated the development of Internet multimedia subsystem (IMS) service architecture, which is touted by service providers and vendors as the next generation solution for breaking the barriers not only between cellular mid ip worlds, but also between wireline and wireless networks. Although many GSM operators and legacy network service providers are adapting rapidly to the IMS worlds the pace of this adaptation process is still quite low in certain parts of the world. In this paper, we propose a novel IMS concept, referred to as Service Concentration Node (SCN), which enables the operators to provide their customers with IMS services that are offered in other domains with which the operator has a signed agreement, and thereby facilitates the utilization of a vast amount of IMS services in various operator networks. The formulated technical framework as well as, its accompanying business model is quite promising in enriching the IMS services experience in next generation networks.

关键词： Next generation networks

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Investigation of Mobile ipv6 and Sip integrated architectures for IMS and Voip applications

Investigation of Mobile IPv6 and SIP integrated architecture...

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international conference on Telecommunications

作者： Medina, Betsabeth Lohi, Mahi Madani, Kambiz Univ Westminster Sch Informat London W1R 8AL England

ISBN: (纸本)9781424420353

Mobile ipv6 and Sip are protocols designed to support different types of mobility. Mobile ipv6 has been used to support mobility in ip networks and Sip has been used for Voice over ip applications. It is the signalling protocol of the ip multimedia subsystem (IMS). In this paper both protocols have been simulated and compared in order to observe their performance for Voice over ip (Voip) applications. In this paper the architectures proposed by researchers in order to combine Mobile ipv6 and Sip have also been investigated and compared to analyse their advantages and disadvantages. A network scenario, running Mobile ipv6 and Sip for IMS, has also been simulated in order to evaluate the performance offered by the two protocols and to compare them with the results from the simulation of the pure Mobile ipv6 and Sip architectures. The comparison shows that the combined scenario offers better performance similar to the one obtained using only Mobile ipv6 with Route Optimization. The scenario simulated was also compared with the integrated architectures for Mobile ipv6 and Sip that were investigated.

关键词： Mobile ipv6 Sip Voip Signalling Protocols

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Interactive multimedia services over open NGN testbed

Interactive multimedia services over open NGN testbed

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4th international ICST conference on Testbeds and Research Infrastructures for the Development of Networks and Communities, TRIDENTCOM 2008

作者： Al-Hezmi, Adel Friedrich, Oliver Arbanowski, Stefan Magedanz, Thomas Fraunhofer Institute FOKUS Berlin Germany

ISBN: (纸本)9789639799240

Delivering multimedia services over Next Generation Networks challenges the developers to define a unified and converged framework. However the ip multimedia subsystem (IMS) defined by the 3rd Generation Partnership Projects offers basic features of such a framework, which enables the provisioning of multimedia services with quality of service and mobility support across heterogeneous networks. The Fraunhofer Institute FOKUS has recently launched the FOKUS Media Interoperability Lab (MIL) which is based on the "Open IMS Playground" testbed. MIL is as an open environment gathering all major IMS core components, and a triple play toolkit originating from own developments as well as major industry players, which can be used by academic and industrial partners for early prototyping of innovative interactive multimedia services and the related system components. This paper introduces the relevant technologies and provides an overview of the lab architecture and the relevant multimedia services at FOKUS. The validation of this architecture is demonstrated with an implementation of different enablers within the Playground as well as an adapted User Agent demonstrating the interaction of streaming and basic NGN telecommunication services.

关键词： multimedia services

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A Framework for IMS Interworking Networks with Quality of Service Guarantee

A Framework for IMS Interworking Networks with Quality of Se...

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7th international conference on Networking (ICN 2008)

作者： Hwang, Jinho Kim, Nakpo Kang, Sangyong Koh, Jongseog Core N/W Development Team N/W Laboratory R and D Group KTF

ISBN: (纸本)9781424442348

The ip multimedia subsystem (IMS) could very well be the best solution for most telecom operators. The more recent releases have included interfaces to fixed line networks and Wireless LANs. This has consequences both for the migration of the core network as well as the integration of future mobile services and applications. Also, an interworking between IMS providers is considered to be a major step toward End-to-End IMS services and ipX (ip Interworking Exchanged) networks are introduced as the requirement to support QoS features in GSMA. But these architectures don't specify any requirements for e2e QoS through ipX networks. This purpose of this article is to research of IMS interworking Network for enlarging IMS services guaranteeing e2e services quality and we suggest the IMIN (IMS Interworking Network) framework to guarantee IMS high quality end-to-end services.

关键词： IMS ip interworking e2e QoS ip backbone

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WS-AMUSE - Web Service architecture for multimedia Services 08

WS-AMUSE - Web Service Architecture for Multimedia Services

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30th international conference on Software Engineering

作者： Scholz, Andreas Buckl, Christian Kemper, Alfons Knoll, Alois Heuer, Joerg Winter, Martin Tech Univ Munich Inst Informat D-85748 Garching Germany

ISBN: (纸本)9781605580791

Recently, a move from traditional, network specific multimedia services to ip-based solutions could be observed. Although many of these applications have similar requirements and address the same issues, individual solutions based on specialized protocols are commonly used. This specialization prohibits the extraction and reuse of common services and hinders the interoperability between services and the integration with external components. A promising approach to overcome these disadvantages is the adoption of the service-oriented paradigm in communication protocols and a modularization into cooperating services. In this paper, we present a generic framework for multimedia applications consisting of a set of reusable Web service components, a modeling language based on finite state automata and a compiler. The results of a BPEL based prototypical implementation of a Voice-over-ip application show that the service oriented approach and the automaton based modeling language can satisfy the above mentioned criteria and ease application development through a higher level of abstraction. On the other hand our benchmarks indicate that current Web service technologies can lead to an insufficient performance, depending on the application scenario. Possible solutions to circumvent these deficiencies are presented at the end of the paper.

关键词： Design Languages Performance

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WAP over TETRA trial services

WAP over TETRA trial services

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6th international Symposium on Communication Systems, Networks and Digital Signal Processing

作者： Stern, A. Volk, M. Kandus, G. Javornik, T. Hrovat, A. Bester, J. Univ Ljubljana Fac Elect Engn Telecommun Lab Trzaska 25 SI-1000 Ljubljana Slovenia Jozef Stefan Inst Dept Commun Syst SI-1000 Ljubljana Slovenia

ISBN: (纸本)9781424418756

ip over TETRA is a solid and robust platform for secure and reliable data communications in the field of public safety and in for other PMR applications. In the paper the basic concepts of WAP application over TETRA network are presented. WAP over TETRA trial architecture is shown and an example of Web application "Dangerous goods" is demonstrated. TETRA enhanced data services offered by TETRA Release 2 are discussed and an introduction of the ip multimedia subsystem into the TETRA environment is given at the end of the paper.

关键词： multimedia services

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High-speed Packet Classification with Efficient Parallel Range Match for ip network applications

High-speed Packet Classification with Efficient Parallel Ran...

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international conference on multimedia and Information Technology

作者： Deng, Xia Huang, Zhiping Su, Shaojing Liu, Chunwu Tang, Guilin Zhang, Yimeng Natl Univ Def Technol Dept Mechatron Engn & Instrumentat Changsha Hunan Peoples R China

ISBN: (纸本)9780769535562

Packet classification has been critical data path function for supporting Quality of Service (QoS), Resource Reservation Protocol (RSVP) and broad range of multimedia services. Hardware based solution is necessary to keep up with high-speed rate up to OC192 processing. However, the range match in multi-fields classification is still one of the bottleneck problems. In this paper, a novel structure called Range Match Block is designed. The Range Match Block stores range rules directly and performs range match parallel in each entry at high-speed. Experimental results show the Range Match Block can process about 66.7 Million Packets Per Second (Mpps). Furthermore, we propose a multi-field packet classification architecture based on Range Match Block and Ternary CAM. The architecture is well-suited for all kinds of network applications.

关键词： component packet classification range match Ternary CAM

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