An Integrated Mobile Service Platform MOEBIUS

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An Integrated Mobile Service Platform MOEBIUS

• C. BLONDIA
• University of Antwerp
• Performance Analysis of Telecommunication Systems
  (PATS) Research Group

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Outline

• Motivation and Objectives of the Moebius project
• Moebius concept and Platform
• Security Key Concepts
• Experimental sites
• Applications
• System Studies
• TCP in a wireless environment
• Conclusions

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Motivation Mobile Extranet

• Extranet
• Members of structured organization (company,
  hospital), need
• Access to internal information / services
• Over the public Internet
• while away from home premises
• Mobility
• Members are mobile

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Key Objectives

• To integrate an overall IP based Mobile Extranet
  platform, exploiting state of the art
  technologies (GPRS, Mobile IP)
• To use the platform for applications
• Health care
• Business and residential
• To verify on the platform, the inter-operations
  of the different technologies
• To identify and study future enhancements to
  better meet global IP concept.

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Specific Objectives

• modifications and enhancements of the various
  protocols needed to support micro- and
  macro-mobility
• identification of the impact on the terminal side
  protocols
• provision of the security infrastructure at both
  network and application level
• development/adoption and integration of
  user-oriented applications
• support of different kind of applications with
  guaranteed QoS levels
• contribution to relevant standardization bodies

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Consortium
University Hospital of Basel (Scientific
Co-ordinator)
Siemens Information and Communication Networks
(Financial Co-ordinator)
Bull S.A.
National Technical University of Athens
University of Antwerp
Telit Mobile Terminals
Polytechnic University of Catalonia
Swisscom
BMR (Univ. of Basel assistant contractor)
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Time and resources

• 2-years project (1.1.2000-31.12.2001)
• Platform integrated by mid-2001
• Budget
• 712 MM (total over 2 years)8.7 MEuro total
  cost2.9 MEuro EU total financial contribution

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MOEBIUS concept
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Moebius Domains
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Moebius System Reference Architecture
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Security Key Concepts

• Provide a secure environment for wireless
  applications using current and new internet
  standards
• Use of an innovative concept SVN (System Virtual
  Network) from Bull that provides a unified
  network view for entities such as users,
  applications and systems.
• Protect the access to the intranet with an access
  server with new features to support IPV6, Mobile
  IP and IPSEC.

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Experimental Sites
Basel site, hosted by the University Hospital of
Basel. Focus is on healthcare applications, with
trials on diabetic, cardiovascular and sleep
disorder diseases, with about 30 people per trial.
Basel - U.H.B.
Milan - Siemens
Milan site, hosted by Siemens. Focus is on
business applications.
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Moebius Health Care Applications (1)
Moebius Integrated Mobile Health Care Solutions
(IMHCS)
Internal Communication
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Moebius Health Care Applications (2)
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Moebius Health Care Applications (3)

• IMHCS applications
• Obesity management for type 2 diabetic patients
• Treatment of cardiac insufficiency
• Data collection and management for devices
  implanted in the human body
• Diagnostic aid for sleep disorders

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Basel (UHB) experimental island
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Moebius Business Applications

• Mobile Applications for Remote Access (MARA)
• Salesman Force
• Access and consultation of customers profiles
• Consultation of products catalogue and price list
• Remote training
• Order insertion
• Sales report
• Management
• Reports on company trends, stocks, salesman
  force, etc.
• Customers
• On-line consulting
• Order insertion and status

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Milano (Siemens) experimental island
GPRS Platform
SGSN GGSN
IP backbone (IPv4 and 6)
MT
Encoded WML
MARA AS
Firewall
XML Engine
WML
WAP GW
MARA DB
HTML
INTRANET IPv6
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Moebius System Studies

• Parameter settings of the platform for optimal
  performance
• Traffic models for Moebius system
• Parameter setting
• Enhancements of platform elements and protocols
• EDGE, UMTS
• Macro and micro-mobility
• Mobility, security management and support of QoS
• TCP/IP in wireless environment

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TCP in Wireless Environment Reference Model
SES 1
Wired access
TCP source 1
DES 1
SES 2
Wireless access
TCP source 2
DES 2
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TCP in Wireless Performance Model
TCP source 1
TCP source 2
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Network Parameters

• Constant packet length
• Bandwidth of shared link b segments/ time unit
• Buffer capacity of 1st router B segments
• Propagation delay SESi - DESi ?i
• Wmax max. number of segments the network can
  accommodate before a loss occurs
• ?1 ?2 ? ? Wmax B 2 ? b

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TCP Model

• TCP Reno
• Slow Start
• congestion window doubles each RTT
• Congestion Avoidance
• congestion window grows with 1 segment each RTT
• Fast Retransmit/ Recovery
• when loss is detected, the window is temporarily
  increased (to react fast on
• segment loss) but is soon restored to half
• Model
• ? no Slow Start Fast Retransmit/Recovery
  (limited duration)
• ? window always grows linearly reduced to half
  when loss occurs

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Modelling the Wireless Medium

• Wireless Access - Additional losses only for
  flow 2
• -
  Incorporate correlated character of these losses
• Model Variant of Gilbert-Elliott model
• Two-state Markov Chain (states Good
  Bad)
• In Good state losses with probability pg
• In Bad state losses with probability pb
• Duration of Good and Bad state exponentially
  distributed
• with means 1/? and 1/? res.
• Packet Loss Ratio of Wireless Channel

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B10, ?5, ?2 (Wmax30)
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Influence of correlation Medium state
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Conclusions Workplan
2000
2001
M24
M0
M12
M3
M6
M9
M15
M18
M21
Specifications
Applications development
Network, terminal, and security components int.
Platform integration and trial execution
System studies and Traffic performance
Management, dissemination, HC trial assessement,
business plan
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Moebius Website

• www.ist-moebius.net