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W i r e l e s s C o mm un i c a t i o n & M o b il e P r o g r a mm i n g. U N IT - 1 – M O B I L E C O M P U T I N G I N T R O D U C T I O N. R e f e r e n c e B ook . “Mobi l e Com pu tin g ” B y Aso k e K T elu k d e r , R oo p a R Y a v a g al , TMH Ch a p t e r s – 2.

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w i r e l e s s c o mm un i c a t i o n m o b il e p r o g r a mm i n g

WirelessCommunication&MobileProgramming

UNIT- 1 – MOBILE COMPUTING INTRODUCTION

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r e f e r e n c e b ook
ReferenceBook

“MobileComputing”ByAsokeKTelukder,RoopaR

Yavagal,TMH

Chapters–2

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slide3

MobileComputing- Architecture

  • Introduction/Evolution
  • Architecture

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slide4

First Tier/Layer

  • UserInterface/PresentationLayer –dealswiththeuser facingdevicehandling&rendering.Thistierincludesauser interfacingcomponentslikeTextbox,Labels,Checkboxes,etc.
  • SecondTier/Layer
  • ProcessManagement/applicationLayer–dealswith Businesslogic&Rules.It is capableof accommodatinghundreds users.
  • ThiredTier/Layer
  • DatabaseManagement/DataTier–dealswithDB
  • management&access.

MobileComputing- Architecture

  • Introduction/Evolution
  • Architecture

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slide5

Three-TierArchitecture

DIY

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slide6

Mobilecomputingenvironmentneeds to becontext-

  • independentas wellas context-sensitive.
  • Here“Context”meansallinformationthathelpdeterminethe stateofobject.Theobjectcanbeperson/device/place/physicalor computationalobject/anyotherentitythatis beingtrackedbythe system.
  • Mobilityimpliestheserviceis associatedwiththeuser/device willchangeconstantly.Sothechangeinthe content&behaviorof theapplicationsshouldbeadoptedtosuit thecurrentsituation.
  • Therearemanyways inwhichcontextscanbeadapted,

DesignconsiderationsforMobileComputing

  • ContentwithContextAwareness
  • Contentswitchon Context
  • ContentTranscoding on Context

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slide7

DesignconsiderationsforMobileComputing

  • ClientContextManager
  • Composite Capabilities/CCor
  • PreferenceProfiles/PP
  • PolicyManager
  • SemanticWeb
  • SecurityManager
  • PlatformforPrivacy
  • PreferenceProject
  • AdaptabilityManager
  • ContentAdaptation&Transcoding
  • ContentRating& Filtering

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slide8

DesignconsiderationsforMobileComputing

  • ClientContextManager
  • Composite Capabilities/CCor
  • PreferenceProfiles/PP
  • PolicyManager
  • SemanticWeb
  • SecurityManager
  • PlatformforPrivacy
  • PreferenceProject
  • AdaptabilityManager
  • ContentAdaptation&Transcoding
  • ContentRating& Filtering

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slide9

DesignconsiderationsforMobileComputing

  • ClientContextManager
  • CompositeCapabilities/CCor
  • PreferenceProfiles/PP
  • PolicyManager
  • SemanticWeb
  • SecurityManager
  • PlatformforPrivacy
  • PreferenceProject
  • AdaptabilityManager
  • ContentAdaptation&Transcoding
  • ContentRating& Filtering

10

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slide10

DesignconsiderationsforMobileComputing

  • ClientContextManager
  • CompositeCapabilities/CCor
  • PreferenceProfiles/PP
  • PolicyManager
  • SemanticWeb
  • SecurityManager
  • PlatformforPrivacy
  • PreferenceProject
  • AdaptabilityManager
  • ContentAdaptation&Transcoding
  • ContentRating& Filtering

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slide11

WAP

Architecture

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slide12

WAP

Architecture

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slide13

WAP–Protocol

Layers

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w a p p r o t o c o l l a y e r s
WAP– ProtocolLayers

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s o c a o c c li e n t s
SOC& AOCClients
  • Mobile users need solutions that can be used effectively at any time during
  • theirwork dayandusedwherevertheirworkstakesthem.
  • MobiletechnologycanbeimplementedwithSometimesOnConnectivity/SOC
  • tomobiledevicesorAlwaysOnConnectivity/AOC.
  • SOC

and AOC terminology effectively describe to our clients the

  • communications frequency and performance: capabilities of alternatives for
  • mobilecomputingsolutions.
  • SOCclientscanworkeffectivelyinadisconnectedmodeandtakeadvantageof wirelessorwiredconnectionswhentheyareavailablewhileAOCclientsmustbe connectedallor mostof thetimeto beeffective.

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s o c c li e n t s
SOCClients
  • SOCclientshavetheabilitytostorelargeamountsofdataonthemobiledevice andprovidetheuserwithacompleteapplicationsolutionevenwhentheuser doesnothaveawirelessorwired dataconnection.
  • Data updates can occur when wireless, Internet dialup, network or desktop synchronizationconnectionsareavailable.Regardlessofconnectivity,productiveworkcanproceed.Dataupdates,whentheydooccur,canbefastburstsofsmall amountsofdataratherthanentirescreenimagesthatAOCclientsemploy.
  • SOCclienttechnologytypicallyrequiresaPocket PCorWinCEdeviceinorderto have sufficient processing power anddata storage capability.AOCclientshave smallamountsofdataornodataonboardthedevice.

20

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a o c c li e n t s
AOCClients
  • AOCclientsrequireawirelessconnectionthatisalwaysontobeabletoaccess
  • dataandtheuserinterface,orscreenimage.
  • AOC clients typically use a browser for application interactions. Internet-like HTMLorWAPisemployedbythebrowsertoviewwebpagesthatareespecially designed for thesmaller screensofmobiledevices.
  • AOC clients require transmission of the data and screen image for each user action. Consequently, mobile workers need a wireless connection constantly availableinorderto effectively useAOCclientmobiledevices.

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