Lab seminar (2009-10-31)
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Lab seminar (2009-10-31). An Experimental Testbed for Building Service-Based Media Applications (Outline of paper draft to be submitted in TridentCom 2010 as testbed practices. Authors: Sang Woo Han, Namgon Kim, Bumhyun Baek, and JongWon Kim). Sang Woo Han [email protected]

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Lab seminar (2009-10-31)

An Experimental Testbed for Building Service-Based Media Applications(Outline of paper draft to be submitted in TridentCom 2010 as testbed practices.Authors: Sang Woo Han, Namgon Kim, Bumhyun Baek, and JongWon Kim)

Sang Woo Han

[email protected]

Networked Media Lab.,

Dept. of Information and Communications

Gwangju Institute of Science and Technology


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Outline

  • Discussion points in this talk

    • What are practical examples of media-oriented service composition experiment (towards immersive future media services)?

      • Multimedia Service Composition, Visual Sharing, IMS, RealCast for realistic broadcasting, ...?

    • What is the proper term that expresses immersive future media services based on composable services? (In this talk, the term “Service-Based Media Applications” is used temporally.)

  • Problem statement

    • Designing testbed platform, mainly focusing on experiment control

  • Problem definition

    • OMX Toolkit development, integrating Java-based software agents, TB management tools, virtualization tools, and measurement tools.

  • Solution

    • TBD


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Towards Immersive Future Media Services

  • Personal needs about immersive media services are growing.

  • Using widely dispersed media contents and tools, flexible media systems are necessary.

  • Service orientation is a driving force to instantaneously and flexibly build value-added multimedia applications on top of composable services in the Internet.

Referring to “Why do we need a content-centric future internet?” created by the Future Content Networks Group, May 2009.


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Service-Based Media Applications by Service Composition Paradigm

  • A media application reuses individual media services to form new and complex process in a time-/cost-aware manner.

  • A media service is a functional entity that assists processing and communication of media streams.


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Towards Service-Oriented Testbed for Media Experiment Support

  • Dynamic service composition by applications

    • Dynamically compose services depending on the functional relationship among services and handle events of testbed

  • Service and resource adaptation combined with monitoring

    • Monitor resource utilization and adapt services accordingly

    • Dynamically adapt resources according to the requests of a service

Construct an extended testbed supporting complicated service composition and stable operation through extended tools for service control and management


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Background Support

  • Designing service-oriented testbeds needs to consider several aspects:

    • On the testbed designed for supporting media processing and delivery and testbed control framework to operate the testbed,

    • We need service control framework to assist experimenters in development and testing of service composition methodologies by using testbed capabilities

  • Composing individual services according to dynamic context changing

  • Guiding the design, development, deployment, operation and retirement of services delivered by a service provider

  • Integrating heterogeneous resources and providing them


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TM Forum SupportSDFs (Service Delivery Frameworks) supports the efficient design, creation, deployment, provisioning and management of seamless services across different access networks


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TEMPO: NICTA Service Delivery and Testbed Framework Support

  • Service delivery framework

    • Support for multiple type of services (e.g., VoD, multiplayer online gaming)

    • Secure and managed P2P approach

    • Optimize distributed service delivery in terms of energy consumption

  • Unified testbed framework (OMF)

    • Control, measure, and manage federations of networking testbeds


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Fraunhofer FOKUS SupportOpen SOA Telco Playground to enable dynamic service composition for multiple network technologies.


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Service Tools for Composition/Provision/Monitoring Support

  • Gush

    • Application development environment

    • Installation on remote hosts

    • Software installation

    • Execution and monitoring processes

    • Event notification from remote hosts to controller

  • Raven

    • Experiment build environment

    • Slice management

    • Resource discovery and selection

    • Software deployment

    • Configuration management

    • Monitoring


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PlanetLab, EmuLab, and ORCA Support

  • PlanetLab

    • The primary large-scale testbed used for experimental overlay

    • Virtualization tools to efficiently share the global resources

  • Emulab

    • A large-scale network emulator, based on a set of computers

    • Configuration of various topologies through emulated network links

  • ORCA (Open Resource Control Architecture)

    • An architecture for on-demand networked computing infrastructure

    • A service-oriented resource control plane


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Testbed Requirements for Building Service-Based Media Applications

  • Experiment Control

    • Abstraction of the details of underlay

    • Centralized experiment control

      • Experiment Sustainability and Repeatability

      • Flexible configuration of TB resources and their capabilities

    • Real-time experiment measurement

  • Testbed Management

    • Virtualization of computing/networking resources

    • Ease of testbed management

    • Real-time resource monitoring

  • Resources

    • High-performance network infrastructure

    • Specialized hardware for media processing and delivery



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Top-Level Logical Components of the Testbed Platform Applications

  • TB management server coordinates multiple RA of the testbed in order to provide resources for experiments.

  • TB experiment control server installs, configures, and executes services involved in experiment description.

  • PCN (programmable computing/networking) RA (resource aggregate) represents a group of PC-based computing and networking resources in the testbed.




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An Example of Experiment Description using Service Composition Algorithm

  • A heuristic service composition algorithm (based on greedy method)

    • SSSD (single source single destination)

    • MSSD (multiple source single destination)

    • MSMD (multiple source multiple destination).

J. Liang and K. Nahrstedt, “Service composition for advanced multimedia applications,” SPIE/ACM Multimedia Computing and Networking Conference, MMCN’05, 2005, San Jose, CA, 2005


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Experiment Tools (GUI) Composition Algorithm

  • Experiment Control Interface & Experiment Status Viewer

    • Left: PCN node list & service properties

    • Center: a network of services

    • Right: participating user list

  • User Interface

    • User requirements (for media sharing) such as End-system capability, desired media source, and media display layout on tiled display


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Agents for Experiment Control Composition Algorithm(Extending SMeet Toolkit)

  • Experiment Agent

    • Being responsible for service configuration, composition, and monitoring

  • Node Agent

    • Create & close virtual nodes

    • Start & stop service agents and measurement tools

  • Service Agent

    • Start & stop software tools

  • Measurement Agent

    • Report measurement data to the experiment agent


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Real-time Measurement using OML/OMF Composition Algorithm

  • PCN node performance monitoring by OML tool using Sigar API

    • System memory, CPU load average

    • Network interface detection, configuration information and metrics, NIC input/output traffic

  • Service performance monitoring by OML tool


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Virtualization using Composition Algorithm

  • Create & close virtual nodes in a PCN node

  • Add & remove virtual Ethernet devices in a virtual node

  • Connect two virtual Ethernet devices attached to different virtual nodes (of a PCN node) using bridge

  • Tunneling between different PCN nodes




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Progress and Plan Preliminary Testbed Evaluation

  • Current Progress

    • Hardware setup and OMF/OML installation

    • Networked tiled display setup

  • Plan

    • In developing OMX (open media experiment for service composition) toolkit, extending SMeet (smart meeting space) toolkit


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