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こうじこいたばし
5 years ago
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2 ( ) )

3 (SM/MM) (UTP TP USB RSC232- C ) RJ11, RJ45, ST, SC MIC (AM, FM) ( * ) (NRZ )

4 P2P ( - )!

5 ( )

6 & TDM( )/FDM( ) ( ) ( )

7 / ( )

8 (IP) (*) vs RADIUS

9 ( ) (CDN Grid) ( )

10 (1) ( ) HTML XML VRML MPEG AVI JPEG GIF DOLBY

11 T) ( V) T)

12 T) ( V) T) ( T) T V?

13 ? Shannon (*) (db)

14 (2) WEB

15 << point2point Legacy Multiple to single (*)

16 Shannon Source encode Receiver decode No Computing Node (Transparent Pipe) If ( ) {!!} else Source Receiver

17 Shannon (?) Source Source Receiver Source Source Source vs Receiver!! (*) vs

19 ( ) ( ) ( )

20 ( ) (1) ( ) ( )

21 (2) (AA ) (AA ) ( ) ( ) e.g., (

22 ( ) (A D ) D D ( ) ( )

23 ( ) (AD ) (MIC) ( ) ( ) (DA ) (SPK) ( ) ( ) ( ) ( ) e.g., (

24 ( ) e.g., MIDI (AD ) ( ) (DA ) (SPK) ( ) ( ) ( ) ( ) e.g., (

25 DSL

26 Digital over Analogue over Digital.. : : xdsl

27 Broadband & Always-On) DSL Asymmetric Digital Subscriber Line On) 512Kbps 1.5Mbps, 128Kbps 256Kbps ( ) NTT ADSL ADSL

29 khz

31 STB Set Top Box CMTS Cable Modem Termination System O/E E/O CMTS HUB Servers STB

32 , 60 ch 54MHz 450MHz FM 260 ch 450MHz 650MHz 650MHz 775MHz 875MHz 1GHz

34 14

37 1 : (1979 ) 2 (G2) (1993 ) PDC(Personal Digital Cellular) TDMA by NTT DoCoMo J-Phone GSM(Global System for Mobile Communications) TDMA by IS-95(Intermediate Standard-95) CDMA by, cdmaone(ddi/ido) IS-136(Intermediate Standard-136) TDMA by

38 PHS(Personal Handyphone System) DECT(Digital Enhanced Codeless Telecommunications)

39 1.152 Mbps 382kbps kbps Mcps ( ) 48.6kbps 42kbps GMSK / QPSK GMSK BPSK QPSK / QPSK / QPSK MH z 300kHz 400kHz 1.25MHz 60kHz 50kHz TDMA-FDD TDMA-FDD TDMA-FDD CDMA-FDD TDMA-FDD TDMA-FDD 1.9GHz 1.9GHz 900MHz 800MHz 800MHz 1.9GHz 800MHz 1.5GHz DECT PHS GSM IS-95 IS136 PDC

40 CDP-D (Cellular Digital Packet Data) : 19.2kbps PIAFS(PHS Internet Access Forum Standard): 96kbps PHS PDC-P (Personal Digital Cellular Packet): 28.8kbps NTT DoCoMo J-Phone GPRS (General Packet Radio Service) : 171.2kbps GSM SGSN(Serving GPRS Support Node) cdma-p (cdma Packet) : 64kbps IS-95(B) CDMA EDGE(Enhanced Data rates for GSM and TDMA-136 Evolution) : 384kbps GSM HSCSD(High Speed Circuit Switched Data) : 57.6kbps GSM

41 PHS CS PHS /ISDN PIAFS TAP PS Digital Analogue PTE Modem PIAFS: PHS Internet Access Forum Standard TAP: Terminal Adaptor for PHS PTE : Protocol Transfer Equipment PS: Personal Station CS Cell Site for PSs

42 PDC-P <PDC-P> PPM PGW Internet MS P-MDE MDE HLR MSC GMSC <PDC> PGW: Packet Gateway PPM: Packet Processing Module P-MDE: Packet Modulation Demodulation Equipment HLR: Home Location Register MSC: Mobile Switching Center MS : Mobile Station POTS/ISDN

43 PDP-P (PDP Packet) TCP IP PPP ayer2 ayer1 TE Layer2 C C M M R T LAPD Layer1 Layer1 MS Layer1 P-MDE Layer1 R T MC MC LAPD Layer2 Layer1 Layer1 PPM IP PPP Layer2 Layer2 Layer1 IP Layer1 PGW TCP IP PPP Layer2 Layer1 DTE ) ( ) ( ( ) ( ) ) CC: Call Control MM: Mobility Management RT: Radio Frequency Transmission Management LAPDM: Link Access Procedure for Digital Mobile Channel DTE: Data Transmission Terminal

44 i, WAP (e.g., i ) Internet GW GW

45 I/F i HTML APL (HTTP ) APL (HTTP ) HTTP SMTP HTML HTTP SMTP TLP PDC-P PDC-P i TLP TCP IP TCP IP TCP PPM M-PGW i IP ALP: Application Layer Protocol TLP: Transport Layer Protocol PPM: Packet Processing Module M-PGW: Mobile Packet Gateway TCP IP Content Provide

48 ETC LAN LAN LAN.00GHz 5.20GHz 5.40GHz 5.60GHz 5.80GHz 6.00GH

49 (aka. )!!! ( LSI ) (aka. ) ( LSI )

50 / ( ) vs

53 Process OS: Operating System AP Lib AP Lib Operating System

54 Operating System CPU

55 Operating System Single User Single Process DOS Single User Multi Process Windows95 Multi User Multi Process UNIX, NT

56 TSS & TSS:

57 System Call Library Routine System Call OS Library routine Application Program Library Routine System Call System Call Operating System

58 UNIX open, read, write, close

59 % csh...

60 Open: fd = open(filename, flags, mode) Read/write: read(fd, buf, nbyte) write(fd, buf, nbyte) close: close(fd) File

62 (1) ( ) ISP( )

63 (2) CSP( ) Contents Aggregator (e.g., ) (e.g., ) ASP (Application Service Provider) SIer (System Integrator)

64 >> ( / ) >> ( << ) >>

65 B-to-B : Business to Business Closed Network (Intranet, Extranet) B-to-C Business to Customer Open Network C-to-C Customer to Customer Full Open Network

66 ( ) (e.g., ) ( disconnecting..) (Presence) Peer-to-Peer Client-Server Peer-to-Peer

橡A little bit faster line to the home

橡A little bit faster line to the home A little bit faster access line to the home - xdsl Internet Access - JANOG6 in 2000/6/16 xdsl DSL = Digital Subscriber Line (ADSL) 6Mbps (ADSL Annex.A G.dmt) 2000/6/16 A little bit faster access line to