This document summarizes a presentation given at the International Conference on Mobile Data Management in 2009. The presentation discussed research into improving mobile access to multimedia services based on MPEG-7 metadata. It described a German research cluster called UMIC that is developing mobile multimedia applications and services. It then discussed methods for enhancing mobile multimedia performance, including distributing services using mobile web services and enterprise service buses. The presentation evaluated these approaches through a system called MobSOS and concluded that scalability and interoperability are important for mobile multimedia services across different platforms.

1. International Conference on Mobile Data
Management (MDM ‘09)
MDM 2009
Mobile Access to MPEG-7 Based
Multimedia Services
Yiwei Cao
Matthias Jarke
Ralf Klamma
Oscar Mendoza
Satish Srirama
Yiwei Cao 曹怡蔚, Matthias Jarke, Ralf Klamma,
Oscar Mendoza, and Satish Srirama
Informatik 5 (Information Systems), RWTH Aachen University
May 19, 2009
Taipei, Taiwan
Lehrstuhl Informatik 5
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-1

2. Agenda
 Introduction
– The German Excellence Research Cluster UMIC
MDM 2009
– Requirements from the LAS multimedia services
– Research questions
Yiwei Cao
Matthias Jarke
 Methodologies and technologies
Mobile access to multimedia services
Ralf Klamma
Oscar Mendoza
Satish Srirama

– 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. Jarke
I5-CJK*-0509-2

3. Introduction to UMIC
 Ultra High-Speed Mobile Information and Communication
– A research cluster established at RWTH Aachen University
MDM 2009
under the excellence initiative of the German Government,
2006-2011 with an average funding of 6.5 million Euro per year
Yiwei Cao
– Concepts and demonstrators for smart, mobile, broadband,
Matthias Jarke
Ralf Klamma
low-cost systems
– Interdisciplinary design with four research
Oscar Mendoza
Satish Srirama
areas among over 20 research groups
 Mobile Application & Services
– Demanding applications of the
next-generation mobile Internet
Lehrstuhl Informatik 5
– Quality of mobile services
 Virtual Campfire – mobile social software
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-3

4. Requirements for UMIC in Scenario
Virtual Campfire
Mobile social software Virtual Campfire
Architecture
MDM 2009 Software MobSOS
Web Mobile
services web services
...
LAS ??
Yiwei Cao
Matthias Jarke
Ralf Klamma
Affordable communication Mesh networks, WiMax, etc.
Oscar Mendoza technologies
Satish Srirama
 A load balancing distribution of multimedia services to
enhance quality of service
 Better access to multimedia services on the mobile client
side for scalability
Lehrstuhl Informatik 5
(Informationssysteme)
 Mobile service sharing among different mobile device holders
Prof. Dr. M. Jarke
I5-CJK*-0509-4

5. The LAS Server
 Lightweight Application Server
(Spaniol et al., 2006)
MDM 2009
 The community engine
 MPEG-7 based multimedia services
Yiwei Cao  Web Services orchestration
Matthias Jarke
Ralf Klamma
Oscar Mendoza
 Easy configuration and rapid prototyping
Satish Srirama
Mobile access?
Distributed?
Lehrstuhl Informatik 5
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-5

6. Research Questions
 How can performance of mobile multimedia applications
be enhanced?
MDM 2009
– Reduction of large data volumes
– Reduction of high cost of wireless data communication
– Dealing with overload of rich semantic information
Yiwei Cao – Data interoperability among different mobile platforms
 Does mobile middleware provide good solutions?
Matthias Jarke
Ralf Klamma
Oscar Mendoza
Satish Srirama
– 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. Jarke
I5-CJK*-0509-6

7. Methodologies and Technologies
 Service Oriented Architecture
(Burberk, 2000; Hasan and Duran, 2006)
MDM 2009 – Web Services
– Cloud Computing (Chappell, 2008)
Yiwei Cao
 Mobile Web Services
Matthias Jarke
Ralf Klamma (Srirama et al., 2006)
Oscar Mendoza
Satish Srirama
– Mobile devices are Web Service
consumers and providers
– Standards based, e.g. SOAP, XML,
WSDL, HTTP
– Use of kSOAP and kXML
Lehrstuhl Informatik 5
 Enterprise Integration (Keen et al., 2004)
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-7
– Enterprise Service Bus (ESB)

8. MPEG-7 Based Multimedia Services
 MPEG-7 Multimedia Content Description Interface (Martinez et al., 2002)
 Multimedia annotation services (Spaniol et al., 2006)
MDM 2009 – Automatic extraction of technical and context-aware information
– Multiple tagging methods: free text, image, semantic based, commsonomy
 Multimedia search services (Cao et al., 2008) LAS services
– Semantic search
Yiwei Cao
Multimedia Multimedia Multimedia
Matthias Jarke
Ralf Klamma
Oscar Mendoza – Keyword search search annotation sharing
services services services
Satish Srirama
– Context-aware search etc.
 Multimedia sharing services (Klamma et al., 08) MPEG-7 services
– Storytelling service LAS core services
– Image services etc.
 The basic multimedia MPEG-7 services (Klamma et al., 2006)
Lehrstuhl Informatik 5
– Creation and modification of MPEG-7 metadata
(Informationssysteme)
Prof. Dr. M. Jarke – XML binding
I5-CJK*-0509-8

9. Alternative System Architecture
 LAS access with Mobile Web
Services
MDM 2009
Yiwei Cao
Matthias Jarke
Ralf Klamma
Oscar Mendoza
Satish Srirama
 LAS access via
Enterprise Service
Lehrstuhl Informatik 5
Bus (ESB)
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-9

10. Implementation
 Mobile middleware
– Mobile Web Services on the
MDM 2009
Mobile Host
– OpenESB
Yiwei Cao
Matthias Jarke
 The prototype on the client side
Ralf Klamma
Oscar Mendoza – Mobile access to LAS
– Nokia N95: J2ME CLDC
Satish Srirama
– iPhone: Objective C
– Mobile multimedia annotation:
free text tagging and MPEG-7
standard based semantic tagging
Lehrstuhl Informatik 5
– Mobile multimedia search
(Informationssysteme)
Prof. Dr. M. Jarke and retrieval
I5-CJK*-0509-10

11. Evaluation via MobSOS
 MobSOS is a test bed for multimedia community services
(Renzel et al., 2008)
MDM 2009
 Theoretically conceptualized on the D&M IS Success Model
(Delone and McLean, 1992)
Yiwei Cao
Matthias Jarke
 Easy in use via the MobSOS HTTP connector
Ralf Klamma
Oscar Mendoza  Each LAS service call is monitored and stored in the
monitoring data repository
Satish Srirama
 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. Jarke
I5-CJK*-0509-11

12. Evaluation Results
 Multimedia files are retrieved on search request on mobile devices
 MPEG-7 based multimedia services are monitored by MobSOS
MDM 2009
Yiwei Cao
Matthias Jarke
Ralf Klamma
Oscar Mendoza
Satish Srirama
Lehrstuhl Informatik 5
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-12

13. Conclusions
 Design and implementation of alternative architecture
Factors Mobile Web Services ESB as middleware
MDM 2009 Performance Response time is proportional to multi- Response time increases
media file size and increases exponentially linearly at a low rate
Scalability Not scalable, only one LAS server is Scalable, distributed access
connected to LAS services
Yiwei Cao
Matthias Jarke
Development Details must be known by clients WSDL is used to publish and
Ralf Klamma cost find Web services on the ESB
Oscar Mendoza
Satish Srirama Reliability Long response time by Web Services Short response time
overload
 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
Lehrstuhl Informatik 5
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-13
 Quality of services can be traced by service monitoring

14. Outlook
 A complete mobile multimedia service chain for
mobile multimedia management
 Interoperable mobile multimedia management
MDM 2009
 Further enhancement of multimedia service
Yiwei Cao
Matthias Jarke quality with MobSOS monitoring Multimedia
sharing by
Ralf Klamma
Oscar Mendoza
Satish Srirama  Multimedia services sharing storytelling etc.
via the XMPP protocol
Multimedia Multimedia Multimedia
 Context-aware and semantic creation with services search and
monitoring adaptation
mobile multimedia services 3D scanners
 Mobile services as nodes in the
MPEG-7 based
Lehrstuhl Informatik 5
(Informationssysteme)
vision of Cloud Computing multimedia
Prof. Dr. M. Jarke annotation
I5-CJK*-0509-14

15. Questions?
 http://www.umic.rwth-aachen.de
 The 8th International Conference on Web-based Learning
MDM 2009
(ICWL‘09), August 19-21, 2009, Aachen, Germany
Yiwei Cao
Matthias Jarke
– Call for participation
– Call for papers to Workshops
Ralf Klamma
Oscar Mendoza
Satish Srirama
Lehrstuhl Informatik 5
(Informationssysteme)
Prof. Dr. M. Jarke
I5-CJK*-0509-15