¦æ°Ê³q°T»P¦æ°Ê­pºâ

Outline

Introduction to Communications

Mechanical Telegraph Used in Crimean War

Watch Tower System

Mechanical Telegraph

French Mechanical Telegraph

Electrical Telegraph

Electrical Telegraph Operators in 1892

Alexander Graham Bell

Can Phone

Evolution of Phone Set

Telephone Pole

Telephone Pole

Telephone Pole

Switch Board

Telephone Network Components

Transmission

Transmission Media

¼vÅT¹q¤l«H¸¹¦b¾É½u¤¤¶Ç¿é®Ä²vªº¦]¯À

¶Ç¿é´C¤¶ - Twisted Pair Cable

¶Ç¿é´C¤¶ - Cable

¶Ç¿é´C¤¶

Comparison of Transmision Medias

Signal

Voice Signal

Time Domain vs. Frequency Domain Voice Spectrum

°T¸¹¶Ç°e§Þ³N

Noise, Interference, SNR

°òÀW»P¼eÀW¶Ç¿é

¼Æ¦ì¡AÃþ¤ñ¡A°òÀW¡A¼eÀW

Amplitude and Frequency Modulation

Modulation (½ÕÅÜ)

Bandwidth

ÀW¼e»P³t«×

ÀW¼e»P³t«×

ÀW¼e»P³t«×

¤j¶ZÂ÷

¤p¶ZÂ÷

¦h¤u (Multiplexing)

¦h¤u (Multiplexing)

Time Division Multiplexing

Synchronous vs. Asynchronous

¹q¸ÜÁn­µ¤§«~½è¤§¶q«× (MOS)

¹q¸ÜÁn­µ¤§«~½è­n¨D

Voice Spectrum

Analog to Digital

Sampling Frequency - Nyquist Theorem

Switch

Fully Connected Phone Network

Switch

Switch Antique

Trunk ¡]·F½u¡^

PSTN

ºô¸ô¤¬³s

U.S. PSTN

¥xÆW PSTN ¤¬³s

ºô¸ô¤¬³s

¹q«Hºô¸ô«H¸¹ (Signaling)

Call Flow

Wireless Technology

A Brief History

RF Signal Propagation

Spectrum Allocation

ITU-R defined ISM Bands

Spectrum Allocation - US

Spectrum Allocation - Singapo

Multipath Interference Problem

Multipath Interference Problem

Rain Attenuation

Doppler Effect

MultiAccess Technology

FDMA

TDMA

TDMA

Spread Spectrum

CDMA

Âù¤u (Full-Duplex)

¦æ°Ê³q°T²¤¶

Scopes of Mobile Communications

¦æ°Ê³q°T²¥v

¥|²Ó­M¨t²Î

¤C²Ó­M¨t²Î

µL½u¹q±µ¨úªA°È

Base Station

Base Station

Base Station

Air Base Station

ºô¸ô¬[ºc

¦æ°Ê¹q¸Üºô¸ô»P©T©wºô¸ô¤¬³s

Registration Procedure

Call Setup Procedure

Handoff

Inter-System Handoff

International Roaming

¦ó¿×GSM¡H

GSMªº¯S¦â

SIM¥d

PUK½X

IMEI

¦æ°Ê¼Æ¾Ú

GPRS ²¤¶

GPRS Architecture

3GSpeed

3GPP Reference Architecture

Logical 3G ºô¸ô¤¸¥ó

¦æ°Ê³q°TÅõºÈ­ì¦]

Mobile Communications were Vulnerable

Mobile Communications were Vulnerable

Mobile Communications were Vulnerable

Mobile Communications were Vulnerable

Mobile Communications were Vulnerable

Voluntary MANET Based P2Pnet

½Ã¬P³q°T

½Ã¬P³q°T¨t²Î¯S©Ê

Synchronous Satellite

Synchronous Satellite

½Ã¬P³q°TÀW²v

½Ã¬P³q°T¤ÀÃþ

Iridium

Space Objects

What is GPS?

Selective Availability

GPS ½Ã¬P¤À§Gª¬ªp

½Ã¬P©w¦ìªº­ì²z

GPSªº¥Î³~

WLAN §Þ³N

802.11 WLAN

MANET

Sensor Network

Bluetooth

WiMAX

What is WiMax?

WiMAX vs. WLAN

¦æ°Ê­pºâªºÀ³¥Î

Future

Untitled Document
Outline

♦ ¹q«Hºô¸ô²¥v

♦ ¶Ç¿é´C¤¶

♦ «H¸¹

♦ ¶Ç¿é§Þ³N

♦ ¥æ´«§Þ³N

♦ µL½u¹q§Þ³N

♦ ¦æ°Ê³q°T²¤¶

♦ ½Ã¬P³q°T

♦ WLAN §Þ³N

♦ ¦æ°Ê­pºâªºÀ³¥Î

Sun Feb 6 00:45:29 CST 2011

Untitled Document
Introduction to Communications
Sun Feb 6 00:45:30 CST 2011 Untitled Document
Mechanical Telegraph Used in Crimean War
Sun Feb 6 00:45:30 CST 2011 Untitled Document
Watch Tower System
Sun Feb 6 00:45:30 CST 2011 Untitled Document
Mechanical Telegraph
Sun Feb 6 00:45:30 CST 2011 Untitled Document
French Mechanical Telegraph
Sun Feb 6 00:45:31 CST 2011 Untitled Document
Electrical Telegraph
Sun Feb 6 00:45:31 CST 2011 Untitled Document
Electrical Telegraph Operators in 1892
Sun Feb 6 00:45:31 CST 2011 Untitled Document
Alexander Graham Bell
Sun Feb 6 00:45:31 CST 2011 Untitled Document
Can Phone
Sun Feb 6 00:45:32 CST 2011 Untitled Document
Evolution of Phone Set
Sun Feb 6 00:45:32 CST 2011 Untitled Document
Telephone Pole
Sun Feb 6 00:45:32 CST 2011 Untitled Document
Telephone Pole
Sun Feb 6 00:45:32 CST 2011 Untitled Document
Telephone Pole
Sun Feb 6 00:45:33 CST 2011 Untitled Document
Switch Board
Sun Feb 6 00:45:33 CST 2011 Untitled Document
Telephone Network Components
Sun Feb 6 00:45:33 CST 2011 Untitled Document
Transmission
Sun Feb 6 00:45:33 CST 2011 Untitled Document
Transmission Media
Sun Feb 6 00:45:33 CST 2011 Untitled Document
¼vÅT¹q¤l«H¸¹¦b¾É½u¤¤¶Ç¿é®Ä²vªº¦]¯À
Sun Feb 6 00:45:34 CST 2011 Untitled Document
¶Ç¿é´C¤¶ - Twisted Pair Cable
Sun Feb 6 00:45:34 CST 2011 Untitled Document
¶Ç¿é´C¤¶ - Cable
Sun Feb 6 00:45:34 CST 2011 Untitled Document
¶Ç¿é´C¤¶
Âùµ±½u Âùµ±½u¬O¥]§t¦³¨â±øµ±¦b¤@°_¡B¤¬¬Ûµ´½tªº¾É½u¡A©ö¨ü¹qºÏªiªº¤zÂZ
¥H¥Ø«eªº§Þ³N¡A¦b100 ¤½¤Ø¥H¤ºªºÂùµ±½u¡A¥i¥H¹F¨ì10~100 Mbps ªº¶Ç¿é³t²v
¨Ï¥ÎÂùµ±½uªº¨Ò¤l¡GEthernet 10BaseT
¦P¶b¹qÆl ¦P¶b¹qÆl¥]§t¤º¥~¨â¼h¾ÉÅé¡A¤¤¶¡«h¬°µ´½tªº§÷®Æ¡A
°Ï°ìºô¸ô¨Ï¥Îªº¦P¶b¹qÆl¥D­n¦³¨âºØ³W®æ¡G50 ¼Ú©i, 75 ¼Ú©i
50 ¼Ú©i Cable
  • ¥Î¨Ó¶Ç°e baseband ¼Æ¦ì°T¸¹¡A
  • ³t²v¤j¬ù¬° 10Mbps¡A
  • ¶Ç¿éªº½d³ò¤j¬ù¬°¼Æ¤½¨½,
  • ¥i±µ100³¡¥H¤W¹q¸£
75 ¼Ú©i Cable
  • ¥Î¨Ó¶Ç°e broadband Ãþ¤ñ°T¸¹(»PCATV¦P)¡A
  • ÀW¼e¬ù¬° 300~400MHZ¡A
  • ¥­§¡¨C­ÓÀW¹DÀW¼e¡G6MHZ/channel¡A
  • ¥­§¡¨C­ÓÀW¹D¶Ç¿é³t²v¡G20Mbps/channel¡A
  • ¶Ç¿éªº½d³ò¤j¬ù¬°¼Æ¤½¨½¡A
  • ¥i±µ1000³¡¥H¤W¹q¸£
¥úÅÖ °ò¥»µ²ºc¥]§t¤@±ø¥úÅÖ¥H¤Îµ´½t«OÅ@µ¥§÷®Æ
±`¨£ªº¥ú·½¦³¨âºØ: µo¥ú¤G·¥Åé (LED), ¹p®g¤G·¥Åé(Laser)
¾A©óªø¶ZÂ÷¡B°ª³t²v(100 ¤½¨½¥H¤W, 500 Mbps ¥H¤W) ªº¸ê®Æ¶Ç¿é
·Lªi¡]Microwave¡^ ¥i¥Î¦bªø³~¹q¸Ü¤§¤¤Ä~
¬õ¥~½u¡]Infrared¡^ »»±±¾¹§Y¬O¨Ï¥Î¬õ¥~½u¨Ó¶Ç¸ê®Æ¡A¦Lªí¾÷¤ÎNotebook§¡¦³¤º«Ø¬õ¥~½u³q°T¤¶­±¡C
¹p®g¡]Laser¡^ ¥ú°£¤F§Q¥Î¥úÅֶǰe¥~¡A¤]¥i¦bªÅ¤¤ª½±µ¶Ç°e¡C³q±`§Q¥Î©T©w¦b°ª³Bªº ¶Ç°e¡þ±µ¦¬³]³Æ¨Ó¶i¦æ³q°T¡C
Sun Feb 6 00:45:34 CST 2011 Untitled Document
Comparison of Transmision Medias

⊕ ´C¤¶¿ï¾Ü¦]¯À

♦ ºô¸ô¬[ºc

    (broadcast vs. point-to-point)

♦ ¸ê®Æ¶Ç¿é¶q

♦ ¥i¾a«×

♦ ¾Q³]Àô¹Ò

Sun Feb 6 00:45:35 CST 2011 Untitled Document
Signal
Sun Feb 6 00:45:35 CST 2011 Untitled Document
Voice Signal
Sun Feb 6 00:45:35 CST 2011 Untitled Document
Time Domain vs. Frequency Domain Voice Spectrum

♦ ¤ÀªR °T¸¹ ªº­«­n°Ñ¼Æ - ÀW²v

Time Domain Frequency Domain
Sun Feb 6 00:45:35 CST 2011 Untitled Document
°T¸¹¶Ç°e§Þ³N
Sun Feb 6 00:45:36 CST 2011 Untitled Document
Noise, Interference, SNR
Sun Feb 6 00:45:36 CST 2011 Untitled Document
°òÀW»P¼eÀW¶Ç¿é
Sun Feb 6 00:45:36 CST 2011 Untitled Document
¼Æ¦ì¡AÃþ¤ñ¡A°òÀW¡A¼eÀW
Sun Feb 6 00:45:36 CST 2011 Untitled Document
Amplitude and Frequency Modulation
Sun Feb 6 00:45:37 CST 2011 Untitled Document
Modulation (½ÕÅÜ)
Sun Feb 6 00:45:37 CST 2011 Untitled Document
Bandwidth
Sun Feb 6 00:45:37 CST 2011 Untitled Document
ÀW¼e»P³t«×
Sun Feb 6 00:45:37 CST 2011 Untitled Document
ÀW¼e»P³t«×
Sun Feb 6 00:45:38 CST 2011 Untitled Document
ÀW¼e»P³t«×
Sun Feb 6 00:45:38 CST 2011 Untitled Document
¤j¶ZÂ÷
Sun Feb 6 00:45:38 CST 2011 Untitled Document
¤p¶ZÂ÷
Sun Feb 6 00:45:38 CST 2011 Untitled Document
¦h¤u (Multiplexing)
Sun Feb 6 00:45:39 CST 2011 Untitled Document
¦h¤u (Multiplexing)
Sun Feb 6 00:45:39 CST 2011 Untitled Document
Time Division Multiplexing
Sun Feb 6 00:45:39 CST 2011 Untitled Document
Synchronous vs. Asynchronous
Sun Feb 6 00:45:40 CST 2011 Untitled Document
¹q¸ÜÁn­µ¤§«~½è¤§¶q«× (MOS)
Sun Feb 6 00:45:41 CST 2011 Untitled Document
¹q¸ÜÁn­µ¤§«~½è­n¨D
Sun Feb 6 00:45:42 CST 2011 Untitled Document
Voice Spectrum
Sun Feb 6 00:45:43 CST 2011 Untitled Document
Analog to Digital
Sun Feb 6 00:45:44 CST 2011 Untitled Document
Sampling Frequency - Nyquist Theorem
Sun Feb 6 00:45:45 CST 2011 Untitled Document
Switch 
Switch
Sun Feb 6 00:45:45 CST 2011 Untitled Document
Fully Connected Phone Network
Sun Feb 6 00:45:46 CST 2011 Untitled Document
Switch
Sun Feb 6 00:45:47 CST 2011 Untitled Document
Switch Antique
Sun Feb 6 00:45:47 CST 2011 Untitled Document
Trunk ¡]·F½u¡^
Sun Feb 6 00:45:48 CST 2011 Untitled Document
PSTN
Sun Feb 6 00:45:48 CST 2011 Untitled Document
ºô¸ô¤¬³s
Sun Feb 6 00:45:48 CST 2011 Untitled Document
U.S. PSTN
Sun Feb 6 00:45:48 CST 2011 Untitled Document
¥xÆW PSTN ¤¬³s
Sun Feb 6 00:45:49 CST 2011 Untitled Document
ºô¸ô¤¬³s
Sun Feb 6 00:45:49 CST 2011 Untitled Document
¹q«Hºô¸ô«H¸¹ (Signaling)
Sun Feb 6 00:45:49 CST 2011 Untitled Document
Call Flow
Sun Feb 6 00:45:49 CST 2011 Untitled Document
Wireless Technology 

Wireless Technology
Sun Feb 6 00:45:50 CST 2011 Untitled Document
A Brief History
Sun Feb 6 00:45:50 CST 2011 Untitled Document
RF Signal Propagation
Sun Feb 6 00:45:50 CST 2011 Untitled Document
Spectrum Allocation

♦ Licenced Band

♦ ISM band

♦ RF band for celluar system < 3.5 GHz

Sun Feb 6 00:45:51 CST 2011 Untitled Document
ITU-R defined ISM Bands
Sun Feb 6 00:45:51 CST 2011 Untitled Document
Spectrum Allocation - US
Sun Feb 6 00:45:52 CST 2011 Untitled Document
Spectrum Allocation - Singapo
Sun Feb 6 00:45:53 CST 2011 Untitled Document
Multipath Interference Problem
Sun Feb 6 00:45:53 CST 2011 Untitled Document
Multipath Interference Problem
Sun Feb 6 00:45:53 CST 2011 Untitled Document
Rain Attenuation
Sun Feb 6 00:45:54 CST 2011 Untitled Document
Doppler Effect
Sun Feb 6 00:45:54 CST 2011 Untitled Document
MultiAccess Technology
Sun Feb 6 00:45:54 CST 2011 Untitled Document
FDMA
Sun Feb 6 00:45:54 CST 2011 Untitled Document
TDMA
TDMA
Sun Feb 6 00:45:55 CST 2011 Untitled Document
TDMA
TDMA
Sun Feb 6 00:45:55 CST 2011 Untitled Document
Spread Spectrum
Sun Feb 6 00:45:55 CST 2011 Untitled Document
CDMA
Sun Feb 6 00:45:55 CST 2011 Untitled Document
Âù¤u (Full-Duplex)
Sun Feb 6 00:45:55 CST 2011 Untitled Document
¦æ°Ê³q°T²¤¶ 
¦æ°Ê³q°T²¤¶
Sun Feb 6 00:45:56 CST 2011 Untitled Document
Scopes of Mobile Communications
Sun Feb 6 00:45:56 CST 2011 Untitled Document
¦æ°Ê³q°T²¥v

♦ 1946 ¦~¤½²³µL½u¹q¸Ü¦b¬ü°ê St. Louis ¶}©l

♦ °ª¥\²v¡B°ª¤Ñ½u¡A¤j²[»\°Ï¡B³s±µ PSTN

♦ §CÀW¹D¶q¡B¥Î¤á¤Ö

♦ 1976 ¦~ New York Area ¥u¦³ 543 «È¤á¡A 3700 ªù¸¹

⊕ ¸Á±_·§©À

♦ ÀW¹D­«½Æ¨Ï¥Î¡A¥[¤j®e¶q

Sun Feb 6 00:45:56 CST 2011 Untitled Document
¥|²Ó­M¨t²Î
Sun Feb 6 00:45:56 CST 2011 Untitled Document
¤C²Ó­M¨t²Î
Sun Feb 6 00:45:57 CST 2011 Untitled Document
µL½u¹q±µ¨úªA°È
Sun Feb 6 00:45:57 CST 2011 Untitled Document
Base Station
Sun Feb 6 00:45:57 CST 2011 Untitled Document
Base Station
Sun Feb 6 00:45:58 CST 2011 Untitled Document
Base Station
Sun Feb 6 00:45:58 CST 2011 Untitled Document
Air Base Station
Sun Feb 6 00:45:58 CST 2011 Untitled Document
ºô¸ô¬[ºc
Sun Feb 6 00:45:58 CST 2011 Untitled Document
¦æ°Ê¹q¸Üºô¸ô»P©T©wºô¸ô¤¬³s
Sun Feb 6 00:45:58 CST 2011 Untitled Document
Registration Procedure
Sun Feb 6 00:45:59 CST 2011 Untitled Document
Call Setup Procedure
Sun Feb 6 00:45:59 CST 2011 Untitled Document
Handoff
Sun Feb 6 00:45:59 CST 2011 Untitled Document
Inter-System Handoff
Sun Feb 6 00:45:59 CST 2011 Untitled Document
International Roaming
Sun Feb 6 00:46:00 CST 2011 Untitled Document
¦ó¿×GSM¡H
Sun Feb 6 00:46:00 CST 2011 Untitled Document
GSMªº¯S¦â
Sun Feb 6 00:46:00 CST 2011 Untitled Document
SIM¥d
Sun Feb 6 00:46:00 CST 2011 Untitled Document
PUK½X
Sun Feb 6 00:46:01 CST 2011 Untitled Document
IMEI
Sun Feb 6 00:46:01 CST 2011 Untitled Document
¦æ°Ê¼Æ¾Ú
Sun Feb 6 00:46:02 CST 2011 Untitled Document
GPRS ²¤¶
Sun Feb 6 00:46:02 CST 2011 Untitled Document
GPRS Architecture
Sun Feb 6 00:46:03 CST 2011 Untitled Document
3GSpeed
Sun Feb 6 00:46:03 CST 2011 Untitled Document
3GPP Reference Architecture
Sun Feb 6 00:46:03 CST 2011 Untitled Document
Logical 3G ºô¸ô¤¸¥ó
Sun Feb 6 00:46:04 CST 2011 Untitled Document
¦æ°Ê³q°TÅõºÈ­ì¦]
Sun Feb 6 00:46:04 CST 2011 Untitled Document
Mobile Communications were Vulnerable
Sun Feb 6 00:46:04 CST 2011 Untitled Document
Mobile Communications were Vulnerable
Sun Feb 6 00:46:04 CST 2011 Untitled Document
Mobile Communications were Vulnerable
Sun Feb 6 00:46:05 CST 2011 Untitled Document
Mobile Communications were Vulnerable
Sun Feb 6 00:46:05 CST 2011 Untitled Document
Mobile Communications were Vulnerable
Sun Feb 6 00:46:05 CST 2011 Untitled Document
Voluntary MANET Based P2Pnet
Sun Feb 6 00:46:05 CST 2011 Untitled Document
½Ã¬P³q°T

♦ Communication satellite serves as a signal repeater in

sky
Uplink °T®§¥Ñ½Ã¬P¶Ç°e¨ì¦a­±³q°T¯¸
Downlink °T®§¥Ñ¦a­±³q°T¯¸¶Ç°e¨ì¨ì½Ã¬P¡C

¦a­±³q°T¯¸¡]Earth Station¡^ ¥i¥H¶Ç°e¤Î±µ¦¬°T¸¹¡A
½Ã¬P³¡¥÷ ¦¬µo¯¸¡C
¦a­±½Ã¬P¤Ñ½u ¤j«¬¡BÃþ¦üºÐª¬ªº¤Ñ½u¡A­t³d±µ¦¬¥Ñ½Ã¬P¶Ç°eªº°T¸¹¡C
Sun Feb 6 00:46:06 CST 2011 Untitled Document
½Ã¬P³q°T¨t²Î¯S©Ê

⊕ ³q°T¶ZÂ÷»·¡BÂл\½d³ò¼s¤j

⊕ ¶Ç¿éªº»ù®æ¥þµM¤£¨ü¶ZÂ÷ªøµuªº¼vÅT

⊕ ¸û¤£©ö¨ü¤ÑµM¨a®`ªº¼vÅT

⊕ ³q°T«~½è°ª¡B®e¶q¤j

Sun Feb 6 00:46:06 CST 2011 Untitled Document
Synchronous Satellite
Sun Feb 6 00:46:07 CST 2011 Untitled Document
Synchronous Satellite
Sun Feb 6 00:46:07 CST 2011 Untitled Document
½Ã¬P³q°TÀW²v
C-band 2~3GHz
Ku-band 11~12GHz
Ka-band 28~40GHz
V-band 50 GHz
Sun Feb 6 00:46:07 CST 2011 Untitled Document
½Ã¬P³q°T¤ÀÃþ

⊕ ¥\¯à¤ÀÃþ

DBS (Direct Broadcasting Satellite;) ½Ã¬Pª½¼½¹qµø
FSS (Fixed Satellite Service) ©T©w³q°T½Ã¬PªA°È e.g. VSAT
MSS (Mobile Satellite Service) ¦æ°Ê³q°T½Ã¬PªA°È ¥Ø«eªº½Ã¬P¤j­ô¤j´N¬O³oºØªA°È¡C

⊕ °ª«×¤ÀÃþ

Name Full Name Attitude (miles) Amount needed to cover the earth
GEO (¦P¨B½Ã¬P) Geostational orbit 22,300 3
ICO (¤¤­y½Ã¬P) Intermediate circular orbit 6,000 10
LEO (§C­y½Ã¬P) Low earth orbit 500 48

♦ ­y¹D¶V°ª¡AÂà³t¶VºC

Sun Feb 6 00:46:08 CST 2011 Untitled Document
Iridium

      äv-­pµe:§Q¥Î66Áû½Ã¬Pºc¦¨³q°Tºô

♦ ¬°¤F­°§C¶Ç»¼®É¶¡¡A¥²¶·¨Ï¥Î§C­y¹D½Ã¬P (LEO)

♦ §C­y¹D½Ã¬P¡AÂà³t«Ü§Ö¡Ahandoff ®É¶¡¬ù 13¤ÀÄÁ

♦ ¢µ­Ó­y¹D­±¡A¦U­y¹D§t11Áû½Ã¬P

Sun Feb 6 00:46:08 CST 2011 Untitled Document
Space Objects

    ¡u¼Ú¬w¤ÓªÅÁ`¸p¡vµo¥¬ªº¹q¸£¼ÒÀÀ¹ÏÅã¥Ü¡A¦b¤HÃþ51¦~ªº¤ÓªÅ±´ÀI¥v¤¤¡A¦@¦³ªñ1¸U7¤d­Ó ¤H³yª«Åé¡A¥]¬A¤õ½b´ÝÀe¡B³ø¼o½Ã¬P¡B¥H¤Î¤´¦b¹B¦æªº½Ã¬P¡A¥]¬A¬ü°ê¡B¼Ú¬w»P¤¤°ê¦b¤º ³£µo®i¥X°lÂܳo¨Çª«Å騾¤î¼²À»ªº¨t²Î¡A¦ý¬O¤´µM¨¾¤£³Ó¨¾¡C¡]¬üÁpªÀ¡^

Sun Feb 6 00:46:08 CST 2011 Untitled Document
What is GPS?
Sun Feb 6 00:46:08 CST 2011 Untitled Document
Selective Availability
Sun Feb 6 00:46:08 CST 2011 Untitled Document
GPS ½Ã¬P¤À§Gª¬ªp
Sun Feb 6 00:46:09 CST 2011 Untitled Document
½Ã¬P©w¦ìªº­ì²z
Sun Feb 6 00:46:09 CST 2011 Untitled Document
GPSªº¥Î³~
Sun Feb 6 00:46:09 CST 2011 Untitled Document
WLAN §Þ³N

⊕ 802.11 WLAN

⊕ MANET

⊕ Sensor Network

⊕ Bluetooth

Sun Feb 6 00:46:09 CST 2011 Untitled Document
802.11 WLAN

♦ 2.4G ISM band µL½u¹qÀW¬q

♦ 802.11b 11 Mbps

♦ 802.11g 54 Mbps

♦ 802.11n (WiFi) 54Mbps¡

♦ ¶ZÂ÷¦]¥\²v¦Ó¦³¤£¦P,¥Ø«e¬O300m¡A¥i±æ¨ì1km¥H¤W¡A

♦ ¥\²v¬ù1mW~100mW¡A¬°WiMaxªº¤d¸U¤À¤§¤@

⊕ Operation Modes

♦ Infrastructure Mode

♦ Ad Hoc Mode

Sun Feb 6 00:46:10 CST 2011 Untitled Document
MANET 
Mobile Ad Hoc Network
-1 7 Sun Feb 6 00:46:10 CST 2011 Untitled Document
Sensor Network 
Sensor Network
-1 7 Sun Feb 6 00:46:10 CST 2011 Untitled Document
Bluetooth

♦ ±Ä¥Î 2.4G ISM band µL½u¹qÀW¬q¡A»P 802.11 WLAN ¤¬¬Û¤zÂZ

♦ ¶ZÂ÷¸û 802.11 WLAN µu¡A³t«×¸û§C

♦ ¾A¥Î©ó¦Õ¾÷µ¥µu¶Z§C³t¤§¥Î

♦ Pairing ³y¦¨¨Ï¥ÎªÌ§xÂZ¡ABluetooth 2.1 ¤§«á¥i¥H§ïµ½

    Secure Simple Pairing - Just Works

    Bluetoothºô¸ôªº°ò¥»³æ¦ìºÙ¬°piconet¡A¦h­Ópiconet«h¥iºc¦¨¤@ scatternet¡CPiconet¥iµø¬°¬O³æ²Ó­Mºô¸ô¡A¦Óscatternet«h¬O¦h²Ó­Mºô¸ô¡C

Sun Feb 6 00:46:10 CST 2011 Untitled Document
WiMAX 
WiMAX

♦ Worldwide Interoperability for Microwave Access

Sun Feb 6 00:46:11 CST 2011 Untitled Document
What is WiMax?

♦ IEEE 802.16

    802.16e (Mobile WiMAX)

♦ ¬°¤F¸Ñ¨M¡uLast Mile¡vªºÃøÃD

♦ ¨Ï¥ÎªºÀW¬q¬°2~11GHz¡A¥¼¨Ó¥H3.5GHz ¬°¥D

♦ ÀW¼e¶Ç¿é³t«×³Ì¤j70Mbps

♦ ³Ì»·¥i¤Î30miles(¬ù48km)¡A³Ì¨Î¦b3~5miles

♦ ¶Ç¿é¥\²v¬ù¦b1000W

♦ ©ó2003¦~¨î­q³W®æ¡A

    ¤ä´©³o¶µ¼Ð·Çªº¥D­n¦³Intel¡BAlvarion¡B¤T¬P¡B´I¤h³q¡BNokia¡B¦èªù¤lµ¥¤½¥q¡C

Sun Feb 6 00:46:11 CST 2011 Untitled Document
WiMAX vs. WLAN

♦ Is WiMAX really better than 802.11?

Sun Feb 6 00:46:11 CST 2011 Untitled Document
¦æ°Ê­pºâªºÀ³¥Î

♦ LBS (Location Based Service)

♦ iPhone

♦ Android

♦ P2Pnet

♦ ¥É¤s­pµe

Sun Feb 6 00:46:11 CST 2011 Untitled Document
Future

♦ ¥¼¨Óªº¥@¬É¡A°ê»Ú¤Æ¶V²`¡A¤Hªºmobiilty ¶V¨Ó¶V°ª¡A
¦æ°Ê³q°T»P¦æ°Ê­pºâ¶V¨Ó¶V­«­n

Sun Feb 6 00:46:11 CST 2011