course contents - csie.ntu.edu.twb92004/course/wms/... · mobile multimedia systems ubiquitous...

Course ContentsCourse ContentsFundamental Wireless Technology

• Propagation Model• Wireless Medium Access• Transport Solutions• Ad hoc Wireless System• Cellular System• Middleware Systems• Multimedia System

Advanced Wireless Technology• Multicasting• Heterogeneous System• Routing Algorithms• QoS/ Reliable Transmissions

MobilityUnpredictablechannel

by QoSInformation

Adaptive Algorithm

by QoSRequirement

Roaming Across a variety of heterogeneous network and service environments Application

RTP, TCP, UDP

RSVP

Wireless Network Layer

IP, Mobile IP

Clustering(optional)

Data LinkMAC

Radio

OS, MiddleWare

New InterestsNew InterestsProvision of Sufficient Transmission Capacity for Broadband Mobile Multimedia: A Step Toward 4G

Future Broadband Radio Access Systems for Integrated Services with Flexible Resource Management

QoS Support for an All-IP system Beyond 3G

Enhancing IP Service Provision over Heterogeneous Wireless Network

Re-configurable Terminals: An Overview of Architectural Solutions

Ubiquitous ServicesUbiquitous Services

Aeronautical CommunicationsAeronautical Communications

SituationSituation--Aware Wireless NetworksAware Wireless Networks

Network Mobility ManagementNetwork Mobility Management

UltraUltra--Wideband RadioWideband Radio

Broadband services:Cable, xDSL,Satelite,

Terestrial

PDA

Camcorder

DVD

Desktopcomputer

Printer

DigitalCamera

LaptopcomputerTV

Home Gatew ay

Monitor

Audio

Reading list for This LectureReading list for This LectureRequired Reading:

(Cfox95) D. Cox,”Wireless Personal Communications: What is it?,”IEEE Personal Communication Magazine, (April 1995) pp.20-35

(S.2001) M. Satyanaraynan, “Pervasive Computing: Vision and Challenges”, IEEE Personal Communication Magazine, (August 2001), pp.10-17

(Bi2001) Qi Bi, George I. Zysman, and Hank Menkes, “Wireless Mobile Communications at the Start of the 21 Century”, IEEE Communication Magazine (January 2001), pp. 110-116

Further Reading(Bolcskei2001) H. Bolcskei, A. J. Paulrai, K. V. S. Hari, and R. U. Nabar,

“Fixed Broadband Wireless Access: State of the Art, Challegnes, and Future Directions”, IEEE Communication Magazine

Mobile ComputingMobile Computing

Verticals HorizontalsApplications

Mobile Operating SystemsOperating Systems

Notebooks PDAs Phones PIMDevices

WANs LANsWireless Networks

Mobile ComputingMobile Computinginformation processing in general

• not just communication or just computing, but bothAny medium or combination of medium

• process not just telephone voice or just data, but multimediaMobility

• components of the systems may bemoving, tether-less (wireless), portable

• uses of the system may be moving

Growth in traffic in different access system Growth in traffic in different access system and voice and data servicesand voice and data services

Mobile Multimedia SystemsMobile Multimedia SystemsUbiquitous information access (everybody else)

• e.g. wireless computing, mobile computing, nomadic computing• information distributed everywhere by “the net”• users carry (wireless) terminals to access the information services• terminal is the universal service access device• terminals adapt to location and services• Knowledge-based society

Flexible Users Choices• In terms of access, service, content• Any where, anytime, any terminal equipments

Wearable Computing terminal / Mobile Broadband services (MBS)

Pervasive ComputingPervasive ComputingTechnology that disappears

• The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it”.

Ubiquitous (Invisible) Computing (Xerox PARC)• Cheap computers of different scale and types embedded everywhere• Potentially 100s of computers per room that disappear into background

(e.g. active badge, tabs, pads, live boards..)• User centric, not terminal centric• Computers swapped and shared among users

Effective Use of Smart SpacesInvisibilityLocalized ScalabilityMasking Uneven Conditioning

Support for Pervasive ComputingSupport for Pervasive ComputingUser Intent

Cyber Foraging

Adaptation Strategy

High-Level Energy Management

Balancing Pro-activity and Transparency

Privacy and Trust

Impact on Layering

Pervasive ComputingPervasive Computing

Aura ClientAura Client

Evolution of Mobile Wireless SystemsEvolution of Mobile Wireless SystemsFirst Generation : Analog – Voice

• Analog modulation• Cellular phone (AMPS) with manual roaming• Cordless phones• Packet radio networks

Second Generation : Digital - Voice & Data• WAP (wireless application protocol)• 2.5 G GPRS• Wireless data LANs (802.11), MANs (Metricom), WANs (CDPD, ARDIS, RAM)

Third Generation: Digital – Multimedia• Unified digital wireless access anytime, anywhere• Voice, data, images, video, music, sensor etc.

4G~ Life after Third-Generation Mobile Communications

Wireless Personal CommunicationsWireless Personal CommunicationsWhat is it?

• Cellular telephone• Cordless telephone• Paging systems• Wide area data networks• Local area data networks

Many ways to segment PCS• Applications• Extent of coverage• Degree of mobility (speed, area)• Circuit switched voice vs. packet-switched data• Mode of communication (messaging, two-way real time, paging, agents)• User location (indoor vs. outdoor, train, airplane)

Common ingredients in all PCS activity• Desire for mobility in communications• Desire to be free from tethers

2000 Market Share2000 Market Share

GPRS Architecture

RS Spectrum AllocationRS Spectrum Allocation

GSM 1800

IMT-2000FDD

MSS TDDI J G H I J K L MSS

2110 2170

IMT 2000

220020252010

1980

198519751920

1915

1905

1900

1895

1880

18501805

MHzG : Reserved I : PACS K : PHSH : DECT J : PACS (To Be Licensed) L : Reserved

Wireless Mobile InterfaceWireless Mobile Interface

Elements of UMTS ArchitectureElements of UMTS Architecture

第三代行動電話之技術標準第三代行動電話之技術標準第三代行動電話之技術標準

LocationLocation--Based ApplicationsBased Applications

33GG--Network integrationNetwork integration

Mobile Broadband SystemMobile Broadband System

Mobile System EvolutionMobile System Evolution

Campus NetworkCampus Network

A c c e s sP o i n t




ATME t h e r S w i t c hE t h e r S w i t c h

Campus Network

E t h e r n e t

WWWServer

WWWServer

OC3interface

Figure 1: Wireless Network Infrastructure

LMDS NCU TestLMDS NCU Test--benchbench

G-17635P7/28/99

E1

E3

HUB

HUB

CENTRAL OFFICE PSTN

INTERNET

ADD-DROPMUX

BACKBONESYSTEM

REMOTE

CLASS V SWITCH

DATA SWITCH

Wireless & Multimedia Network LaboratoryWireless & Multimedia Network Laboratory™™

Architecture of the DemoArchitecture of the Demo

National Central University Demo National Central University Demo LayoutLayout

G-17833P 8/19/99

VIDEO

DATA(INTERNET)VOICE

DS3MUX

38 GHz RADIO

HUB

EMS

RT#1

RT#2

HT#1

Wireless & Multimedia Network LaboratoryWireless & Multimedia Network Laboratory™™

Step.1 LMDS ArchitectureStep.1 LMDS Architecture

11

IEEE 802.11 Configurations IEEE 802.11 Configurations -- IndependentIndependent

AH3

Station

Station

AH1

AH2

Ad Hoc Network

Independent• one Basic Service Set - BSS• Ad Hoc network• direct communication• limited coverage area

Topology of a Wireless LANTopology of a Wireless LAN進接(Access)應用: 使用者與網路的連接

中繼(Trunk)或骨幹(Backbone)應用: 網路與網路之間的連接. 例如,大樓與大樓之間的通訊, 或是遠方網路的連接.

AP

WirelessBridge

WirelessBridge

1~10公里

IP integrationIP integration

WiMediaWiMedia Solutions Solutions –– Simple UsageSimple Usage

Capacity and MobilityCapacity and Mobility

DirecPCDirecPC Satellite ExperimentsSatellite Experiments

台北陽明山網路控管中心

中壢國立中央大學

研究二館

Ubiquitous Access

WLAN

Cellular System

WLAN

DirecPC

““Anytime Anywhere Anytime Anywhere ”” Information Information SystemSystem

Three System Components Three System Components

End-PointTerminal Architecture

InfrastructureNetwork architecture

ServicesOS & Middleware

Connect devices to internet on the Connect devices to internet on the mobilemobileinfrastructure world wideinfrastructure world wide

QoS and Multimedia Traffic SupportApplication

RTP, TCP, UDP

RSVP


IP, Mobile IP


Data LinkMAC

Radio

OS, MiddleWare


by QoSInformation

Adaptive Algorithm

by QoSRequirement


RTP, TCP, UDP

RSVP


IP, Mobile IP


Data LinkMAC

Radio

OS, MiddleWare

Adaptive Algorithm

by QoSRequirement


by QoSInformation

Channel Propagation and FadingChannel Propagation and Fading

IntraIntra--Domain HandoffDomain Handoff

Resource SharingResource SharingReservation Approaches

• Centralized Control• token (round robin)

Collision Approaches• fight for resource• distributed control

Through A Centralized ControlThrough A Centralized ControlTDMA, FDMA, CDMA

MACA/PRMACA/PR

S DPkt (t1)

Pkt (t2)

Pkt (t3)

Pkt (t1)

Res (t2)

Res (t2)

Res (t2)

Res (t2)

Cycle

RTS

CTSPkt

Res

PktRes


RTP, TCP, UDP

RSVP


IP, Mobile IP


Data LinkMAC

Radio

OS, MiddleWare


by QoSInformation

Adaptive Algorithm

by QoSRequirement

Internetworking, IP, MobileInternetworking, IP, MobileInternetworking

• roaming through different networks• supporting IP format• supporting IP portability


RTP, TCP, UDP

RSVP


IP, Mobile IP


Data LinkMAC

Radio

OS, MiddleWare


by QoSInformation

Adaptive Algorithm

by QoSRequirement

What problem does Multimedia Bring?What problem does Multimedia Bring?

Integrated ServicePacket Network

Telephone Circuit network

Emerging technologies:1. “Datagrams” + “Flows” IPv62. “Virtual Circuits” (ATM)

System ConfigurationsSystem ConfigurationsAd hoc ~ Multi-hop

• Wireless LAN• Blue-tooth• Packet Radio• WAMIS

Cellular ~ GSM, WAP, GPRS, 3G

Satellite ~ LEO, GEO

Ad Hoc Wireless Network

Wired Network,Internet, PSTN,ATM network

Access PointGateway

Wired Network,Internet, PSTN,ATM network

User Moves

Handover

Typical Cellular CallTypical Cellular CallInitialization (find your base-station)

Service Request• Location Level : Paging• Channel Assignments

Handoff

Wireless Wireless CommComm::Heterogeneity & SecurityHeterogeneity & Security

Heterogeneous networks

Internet中央大學臺灣大學Horizontal Handoff

VerticalHandoff

Taipei Cellular

Limited & Variable BandwidthLimited & Variable BandwidthLow bandwidth compared to wired

Highly variable bandwidth

High latency

Wireless CommunicationWireless CommunicationMore difficult than wired communication

Dis-connections

MobilityMobilityAddress migration

Location-dependent information

Migration locality

PortabilityPortabilityLight weight power

Risks to data

Small user interface

Small storage capacity

Challenges in Mobile Multimedia Challenges in Mobile Multimedia SystemPortable end-points

End-to-end Quality of Services

Seamless operation under context (location) changes

Context-aware operation

Secure operation

Channel Propagation and FadingChannel Propagation and Fading

Dr. Eric Hsiaokuag Wu　　http://inrg.csie.ntu.edu.tw/course/wms2005 SpringFirst Week AgendaWhat is Going to Happenin the Course?Course ContentsNew InterestsUbiquitous ServicesAdaptive ApplicationsExpectation of the ClassAeronautical CommunicationsSituation-Aware Wireless NetworksNetwork Mobility ManagementUltra-Wideband RadioCourse ProcessMobile ComputingReading list for This LectureMobile ComputingMobile ComputingWhy should we care ?Growth in traffic in different access system and voice and data servicesIs there a more “academic” reason ?Mobile Multimedia SystemsPervasive ComputingSupport for Pervasive ComputingPervasive ComputingAura ClientWireless CommunicationsEvolution of Mobile Wireless SystemsWireless Personal Communications2000 Market ShareMobile Terminal GrowthRS Spectrum AllocationWireless Mobile InterfaceLocation-Based Applications3G-Network integrationMobile Broadband SystemMobile System EvolutionWiMAX Nomadic and Portable National Central University&Hughes Network SystemsLMDS Demo BriefingCampus NetworkLMDS NCU Test-benchArchitecture of the DemoNational Central University Demo LayoutStep.1 LMDS ArchitectureWiMAX Consumer Last MileIEEE 802.11 Configurations - IndependentIP integrationWiMedia Solutions – Simple UsageCapacity and MobilityDirecPC Satellite Experiments“Anytime Anywhere ” Information SystemFundamental IssuesThree System ComponentsPersonal area networkConnect devices to internet on the mobile infrastructure world wideChannel Propagation and FadingResource SharingThrough A Centralized ControlMACA/PRInternetworking, IP, MobileWhat problem does Multimedia Bring?System ConfigurationsTypical Cellular CallWireless Comm:Heterogeneity & SecurityLimited & Variable BandwidthWireless CommunicationMobilityPortabilityChallenges in Mobile Multimedia Infor-SystemChannel Propagation and Fading

course contents - csie.ntu.edu.twb92004/course/wms/... · mobile multimedia systems ubiquitous...

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