CS1: Wireless Communication and - PowerPoint Presentation

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CS1: Wireless Communication and - PPT Presentation

Mobile Programming Dr Khaled Mahmud Laurentian University International Global Experience Program Summer 2016 Mobile Computing Architecture Agenda Internet Ubiquitous network Mobile computing architecture ID: 804446

tier khaled context data khaled tier data context mobile middleware network computing application database xml web server management access

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Slide1

CS1:Wireless Communication and Mobile Programming

Dr. Khaled MahmudLaurentian University International Global Experience ProgramSummer 2016

Mobile Computing Architecture

Slide2

AgendaInternet- Ubiquitous networkMobile

computing architecturePresentationApplication DataMobile computing design considerationContentContextPlatformSecurity(c) Khaled Mahmud2

Slide3

ReferenceChapter 2 [TEL]Web references

Slide4

Hierarchy of NetworksCore DistributionAccess

Slide5

Next Generation Network (NGN)(c) Khaled Mahmud

5Source: Huawei

Slide6

The InternetThe network of networks: The biggest network of allUbiquitous (almost there)IP-based network

Ready to carry any content/service (voice, video, data)(c) Khaled Mahmud6Source: Cisco

Slide7

3-Tier Architecture of Mobile Computing:Network-centric Approach

Presentation TierApplication TierData Tier(c) Khaled Mahmud7

User Interface

Tier-1:

Presentation Tier

Access Network

Proxies/

Adaptation Middleware

Tier-2:

Application Tier

Tier-3: Data Tier

Process Management Middleware

Business Logic

Database Management Middleware

Data Store

Slide8

Components of 3-Tier(c) Khaled Mahmud

8Presentation Tier

Application Tier

Data Tier

Database

XML Data Store

Aggregation service

Data and web feed

Legacy applications

Equipment

Appliances

Other applications and web services

iPlanet

web server

Java server pages

SOAP

XML

Apache

.NET Tier

Google’s cloud computing –based tier

Internet Information Server

XSLT

HTML

WML/HDML

Active Server Page

JavaScript

Internet Explorer

Android browsers

Opera mobile

WAP browser

J2ME

Voice

HTTP

RTSP

HTTPS

IBM

WebSpehere

Servlets

Oracle

WebLogic

JBOSS

Jakarta

SAP Net Weaver

Enterprise Java Beans

ZOPE

Glass Fish

CGI (C, Perl, Python)

Zend

PHP

Jetty

Roxen

Pike

Oracle and its applications

MS Commerce Server

MS Exchange

COM

.NET & Transaction server

RMI

IIOP

SOAP

RPC

XML

COM

JDBC

SQL

XML

adapters

Slide9

Presentation TierRelated to User InterfaceAudio, visual, other mechanical (e.g. touch screen, gyro, vibration, pen)

Runs on client deviceIncludes browsers, customized client programsCan involve various agent softwareFunctions range from simple HTTP-based service access to complex data access and management(c) Khaled Mahmud9

Slide10

Application Tier‘Middle Tier’Runs

Business LogicProcess user inputObtain dataMake decisionPerforms transcodingTechnologies include CGI, Java, JSP, .NET, PHPUsually (should be) independent of Presentation or Data Tier(c) Khaled Mahmud10

Slide11

Application Tier (cont…)Mobile computing environment specific functionsDecisions on rendering

Network managementSecurityDatastore accessMost of these functions are implemented in middlewares(c) Khaled Mahmud11

Slide12

Categories of MiddlewareMessage-oriented middlewareTransaction Processing middleware

Database middlewareCommunication middlewareDistributed objects and componentsTranscoding middleware(c) Khaled Mahmud12

Slide13

Web ServicesStandard means of information exchangeBetween different software application

Running on variety of platformsIdentified by URIUses XML/JSON to define public interfacesBasic architecture includeService requesterService providerDiscovery agency Interaction flow: PublishFindBind(c) Khaled Mahmud13

Slide14

Data TierDatastore or databaseCan be permanent or temporary

Can be Text-basedHierarchicalRelationalXML/JSON formatA legacy system can be considered as data source or a documentThrough proper adapter (middleware)(c) Khaled Mahmud14

Slide15

Database MiddlewareDatabase should be independent of Application Tier (business logic)Database middleware helps to create that isolation

Database middleware runs between application program and databaseDatabase middleware are also called connectorsODBC, JDBCConnectors enable program to access various data sources from various database vendors(c) Khaled Mahmud15

Slide16

OMA Data Synchronization and Device Management (SyncML)

Developed under the project calledOpen Mobile Alliance Data Synchronization and Device ManagementFormerly called SyncMLVendor independent data synchronization solutionThe protocol supportsHTTP 1.1Browser and Content (previously called WAP browsing): XHTML Mobile ProfileOBEX (used in Bluetooth)SMTP/POP3/IMAPSupported byMotorolaSamsungNokia/Siemensand others(c) Khaled Mahmud16Source: https://en.wikipedia.org/wiki/Open_Mobile_Alliance

Slide17

Design Consideration of Mobile ComputingMobile computing development needs to beContext-sensitiveBut context independent

Slide18

Context-based Service AdaptationService needs to be adapted according to the contextContent can be adaptedBehavior can be adapted

ApproachesContent with context awarenessContent switch on contextContent transcoding(c) Khaled Mahmud18

Slide19

What is Context in Mobile Computing?Definition by feature: Contextual Information

UserPreferences, Goals, State of Mind, etc.TaskDifficulty, Criticality, etc.EnvironmentTemperature, location and settings, nearby services& people, etc. TimeTime of day, day of week, etc.(c) Khaled Mahmud19Source: Ed Sykes, et. al.

Slide20

Contextual Information(c) Khaled Mahmud

Slide21

Context-aware SystemContext-aware system can handle context-related informationExtract Interpret

Use Adapts functionality to match the current contextChallenge for machinesContext captureContext representationFiltering and interpretation of contextual data(c) Khaled Mahmud21

Slide22

Context ManagementInvolvesContext sensing

Context representationContext interpretation(c) Khaled Mahmud22

Slide23

Context RepresentationW3C approachComposite Capabilities/Preference Profile (CC/PP)Resource Description Framework (RDF)

Semantic Web(c) Khaled Mahmud23

Slide24

Client Context ManagementInvolvesPolicy Manager

Security ManagerAdaptability Manager(c) Khaled Mahmud24

Slide25

Security ManagerProvides secure connection between client device and origin serverMain security issues

ConfidentialityIntegrityAvailabilityNon-repudiationTrust(c) Khaled Mahmud25