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Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-1
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Mobile Access to MPEG-7 Based Multimedia Services
Yiwei Cao 曹怡蔚, Matthias Jarke, Ralf Klamma, Oscar Mendoza, and Satish Srirama
Informatik 5 (Information Systems), RWTH Aachen University
May 19, 2009Taipei, Taiwan
International Conference on Mobile Data Management (MDM ‘09)
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-2
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Agenda Introduction
– The German Excellence Research Cluster UMIC– Requirements from the LAS multimedia services– Research questions
Methodologies and technologies Mobile access to multimedia services
– Mobile access with mobile web servers and via ESB– Implementation on iPhones and smartphones– Evaluation by service monitoring on MobSOS
Conclusions and outlook
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-3
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Introduction to UMIC Ultra High-Speed Mobile Information and Communication
– A research cluster established at RWTH Aachen University under the excellence initiative of the German Government, 2006-2011 with an average funding of 6.5 million Euro per year
– Concepts and demonstrators for smart, mobile, broadband, low-cost systems
– Interdisciplinary design with four researchareas among over 20 research groups
Mobile Application & Services– Demanding applications of the
next-generation mobile Internet – Quality of mobile services
Virtual Campfire – mobile social software
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-4
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Affordable communication technologies
SoftwareArchitecture
Requirements for UMIC in Scenario Virtual Campfire
A load balancing distribution of multimedia services to enhance quality of service
Better access to multimedia services on the mobile client side for scalability
Mobile service sharing among different mobile device holders
Virtual Campfire
Mesh networks, WiMax, etc.
Web services
Mobile web services
Mobile social software
LAS ??
MobSOS
...
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-5
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
The LAS Server
Lightweight Application Server(Spaniol et al., 2006)
The community engine MPEG-7 based multimedia services Web Services orchestration Easy configuration and rapid prototyping
Mobile access?Distributed?
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-6
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Research Questions How can performance of mobile multimedia applications
be enhanced?– Reduction of large data volumes– Reduction of high cost of wireless data communication– Dealing with overload of rich semantic information– Data interoperability among different mobile platforms
Does mobile middleware provide good solutions?– What kind of mobile middleware solutions exist on those
handheld devices with limited resource capacity? – Is additional data communication overhead resulted
by middleware?– What about the portability and scalability of mobile access
on various mobile platforms?
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-7
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Methodologies and Technologies Service Oriented Architecture
(Burberk, 2000; Hasan and Duran, 2006)– Web Services – Cloud Computing (Chappell, 2008)
Mobile Web Services (Srirama et al., 2006)– Mobile devices are Web Service
consumers and providers– Standards based, e.g. SOAP, XML,
WSDL, HTTP– Use of kSOAP and kXML
Enterprise Integration (Keen et al., 2004)– Enterprise Service Bus (ESB)
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-8
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
MPEG-7 Based Multimedia Services MPEG-7 Multimedia Content Description Interface (Martinez et al., 2002)
Multimedia annotation services (Spaniol et al., 2006)– Automatic extraction of technical and context-aware information– Multiple tagging methods: free text, image, semantic based, commsonomy
Multimedia search services (Cao et al., 2008)– Semantic search– Keyword search– Context-aware search etc.
Multimedia sharing services (Klamma et al., 08)– Storytelling service– Image services etc.
The basic multimedia MPEG-7 services (Klamma et al., 2006)– Creation and modification of MPEG-7 metadata– XML binding
MPEG-7 services
LAS servicesMultimedia
sharingservices
Multimediaannotationservices
Multimediasearch
services
LAS core services
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-9
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Alternative System Architecture
LAS access with Mobile Web Services
LAS access via Enterprise ServiceBus (ESB)
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-10
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Implementation Mobile middleware
– Mobile Web Services on the Mobile Host
– OpenESB The prototype on the client side
– Mobile access to LAS– Nokia N95: J2ME CLDC – iPhone: Objective C
– Mobile multimedia annotation: free text tagging and MPEG-7 standard based semantic tagging
– Mobile multimedia search and retrieval
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-11
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Evaluation via MobSOS MobSOS is a test bed for multimedia community services
(Renzel et al., 2008) Theoretically conceptualized on the D&M IS Success Model
(Delone and McLean, 1992) Easy in use via the MobSOS HTTP connector Each LAS service call is monitored and stored in the
monitoring data repository The survey data repository to enhance system and
information quality via users’ satisfaction measure Data analysis with SPSS
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-12
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Evaluation Results Multimedia files are retrieved on search request on mobile devices MPEG-7 based multimedia services are monitored by MobSOS
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-13
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Conclusions Design and implementation of alternative architecture
Interoperability and scalability are crucial for mobile multimedia services across various mobile platforms
Load balancing can reduce wireless data communication cost and improve mobile multimedia service quality
Quality of services can be traced by service monitoring
Factors Mobile Web Services ESB as middlewarePerformance Response time is proportional to multi-
media file size and increases exponentiallyResponse time increases linearly at a low rate
Scalability Not scalable, only one LAS server is connected
Scalable, distributed access to LAS services
Developmentcost
Details must be known by clients WSDL is used to publish and find Web services on the ESB
Reliability Long response time by Web Services overload
Short response time
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-14
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Outlook A complete mobile multimedia service chain for
mobile multimedia management Interoperable mobile multimedia management Further enhancement of multimedia service
quality with MobSOS monitoring Multimedia services sharing
via the XMPP protocol Context-aware and semantic
mobile multimedia services Mobile services as nodes in the
vision of Cloud Computing
Multimedia creation with 3D scanners
Multimedia services
monitoring
Multimedia sharing by
storytelling etc.
MPEG-7 based multimedia annotation
Multimedia search and adaptation
Lehrstuhl Informatik 5(Informationssysteme)
Prof. Dr. M. JarkeI5-CJK*-0509-15
MDM 2009
Yiwei CaoMatthias JarkeRalf Klamma
Oscar MendozaSatish Srirama
Questions? http://www.umic.rwth-aachen.de
The 8th International Conference on Web-based Learning (ICWL‘09), August 19-21, 2009, Aachen, Germany– Call for participation– Call for papers to Workshops