Evaluating 'Net for Mobile Solutions

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Evaluating .Net for Mobile Solutions
Broadband 2
Xiaogeng Zhao, Peter Clayton
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Table of Contents

• Mobile Internet and wireless services
• .NET is emerging as a mobile platform
• .NET vs. traditional distributed computing models
• Other major competitors of .NET
• Mobile Devices Capacity and Markup Language
  Categories
• Mobile Application / Services Developing
  Environments
• Risk evaluation
• Summary

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Mobile Internet and Wireless Services

• Internet-enabled mobile devices

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Mobile Internet and Wireless Services

• Mobile services

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.NET is Emerging as a Mobile Platform

• What is .NET
• .NET Mobile Solution
• XML - eXtensible Markup Language
• WSDL - Web Service Description Language
• SOAP - Simple Object Access Protocol
• UDDI - Universal Discovery Description and
  Integration

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.NET vs. Traditional Distributed Computing Models

• Traditional Distributed Computing Models
• DCOM - Distributed Component Object Model
• CORBA - Common Object Request Broker Architecture
  
• RMI - Remote Method Invocation
• .Net Model
• Loosely coupled model VS. Tightly coupled model

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Other Major Competitors

• SUN Java
• IBM Start Now
• ORACLE .Now
• HP E-Services

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Mobile Devices Capacities and Markup Language
Categories

• Pocket PC
• HTML32
• WML cell phone
• WML1.1(2)
• Japanese cell phone
• CHTML

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Mobile Application / Services Developing
Environments

• .NET MIT
• J2ME JWT
• Manufacture develop toolkit
• Motorola TM
• Siemens TM
• Nokia TM

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Mobile Internet Toolkit

• MIT - Mobile Internet Toolkit
• Sample scenario - One application/service - all
  devices
• Display rendering
• Code Behind
• (1) Application.aspx (2) web.config (3)
  CustomizedFilter.dll

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Mobile Internet Toolkit

• ltmobileImage id"Image1" runat"server"
  AlternateText"RU Logo" Alignment"Center"gt
• ltDeviceSpecificgt
• ltChoice Filter"isHTML32"
  ImageUrl"Rhodes.gif"gtlt/Choicegt
• ltChoice Filter"isWML11"
  ImageUrl"Rhodes.wbmp"gtlt/Choicegt
• lt/DeviceSpecificgt
• lt/mobileImagegt

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Mobile Internet Toolkit

• lt?xml version"1.0" encoding"utf-8" ?gt
• ltconfigurationgt
• ltsystem.webgt
• ltdeviceFiltersgt
• ltfilter name"isHTML32" compare"PreferredRen
  deringType" argument"html32" /gt
• ltfilter name"isWML11" compare"PreferredRend
  eringType" argument"wml11" /gt
• ltfilter name"isCHTML10" compare"PreferredRe
  nderingType" argument"chtml10" /gt
• ltfilter name"isNokia7110" compare"Type"
  argument"Nokia 7110" /gt
• ltfilter name"supportsColor"
  compare"IsColor" argument"true" /gt
• ltfilter name"supportsCookies"
  compare"Cookies" argument"true" /gt
• ltfilter name"supportsJavaScript"
  compare"Javascript" argument"true" /gt
• ltfilter nameisSupperScreen"
  typeDannyNamespace.DannyFilter,
  DannyFilter.dll"
• method" isSupperScreen"gt
• lt/deviceFiltersgt
• lt/system.webgt
• lt/configurationgt

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Mobile Internet Toolkit

• namespace DannyNamespace
• public class DannyFilter
• ...
• public static bool isSupperScreen(MobileCapabili
  ties cap, String str)
• bool isSupper false
• if (cap.ScreenPixelsWidth
• cap.ScreenPixelsHeight gt 230150)
• isSupper true
• return isSupper
• ...
• public static bool otherFilter()...
• ...

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Java Wireless Toolkit

• J2METM
• Java Mobile Solution
• CLDC - Connected Limited Devices Configuration
• MIDP - Mobile Information Devices Profile
• JWT - J2ME Wireless Toolkit

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Risk Evaluation

• Potential risks of using .Net mobile solutions
• General risks
• Security issue
• System integrity
• Compatibility
• Other issues

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Summary

• Mobile revolution brings great opportunities
• Opportunities always come together with risks
• Technologies need time to become mature
• Multi-Techs/solutions co-existing situation

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This work was undertaken in the Distributed
Multimedia Centre of Excellence at Rhodes
University with financial support from Telkom,
Comparex Africa, Letlapa Mobile Solutions and
THRIP.
We also acknowledge the bursary support of
Microsoft.