Tong Quan Ve Cong Nghe Vien Thong In

8/9/2019 Tong Quan Ve Cong Nghe Vien Thong In

1/15

PTTC2 - Bi dng kin thc c bn v vin thng

Gio vin:ng Quc Anh - www.dangquocanh.com 1

1

KHI NIM V VIN THNG

PTTC2

PTTC2

www.dangquocanh.com2

Tng quan v vin thng

T chc: PTTC2 Gio vinng Quc Anh, thc sin t Vin

thng, T: (84)(90)394-5504, Email:[email protected], Website:

www.dangquocanh.com Thi gian: 4 ngy (20 thng 7 ti 23 thng 7 nm

2010) Sng: 5 tit t 8:00 ti 12:00 Chiu: 5 tit t 13:30 ti 17:30

PTTC2


Certificates

PTTC2


Cc lp ngn hn thc hin

1. 12/2000: xDSL cho SACOM (40)2. 6/2001: Cng ngh DSL ti PTTC2 cho bu in

cc tnh (80)3. 6/2002: Cng ngh DSL ti PTTC2 cho bu in

cc tnh (50)

4. 6/2002: Cng ngh DSL ti PTTC2 cho bu intp. HCM (60)5. 10/2002: ADSL thc tin, gii php v trin khai

trn mng TTX ISDN (100)6. 12/2002: ADSL thc tin, gii php v trin khai

trn mng TTX ISDN (260)


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PTTC2


Mt vi hnh nh

PTTC2



7. 1/2003: K thut v mng ADSL theo d n caVNPT cho Bnh Dng v ng Nai (20)

8. 3/2003: Dch v ADSL cho bu in ng Nai (50)9. 6/2003: K thut ADSL theo d n ca VNPT: K2,

K3, K4 (210)

10. 6/2003: Dch v ADSL theo d n ca VNPT: D3,D4 (100)11. 7/2003: Cn bn k thut ADSL cho KASATI (40)12. 7/2003: C hi kinh doanh ADSL cho cn b qun

l Cng ty in bo in thoi ng Nai (200)13. 10/2003: Khai thc dch v ADSL cho Bu in

ng Nai (50)

PTTC2


Cc lp ngn hn thc hin14. 3/2004: Khai thc dch v ADSL trn mng o

to t xa ISDN (540)

15. 3/2005: o th lp t ADSL trn mng o tot xa ISDN (300)

16. 1/2007: Ci t modem router ADSL cho Cng tyVin thng Cn Th Hu Giang (38)

17. 5/2007: Ci t modem router ADSL trn mngDTTX (220)

18. 6/2007: Ci t modem router ADSL cho bu inSc Trng (38)

19. 8/2007: Ci t modem router ADSL cho Cng tyVin thng Cn Th Hu Giang (30)

PTTC2



20 10/2007: Ci t modem router ADSL choVin thng Kin Giang (35)

21 5/2008: Ci t modem router ADSL choVin thng An Giang (65)

22 6/2008: Ci t modem router ADSL choVin thng Ty Ninh (40)

23 1/2009: Ci t modem router ADSL choFPT Telecom (350)

S hc vin hun luyn cho v ADSLtrong gn 10 nm: 2.916 hc vin


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PTTC2


Ni dung

Lch s pht trin vin thng1

Nhng thay i trong vin thng2

Mng cng cng mi3

S hi t4

PTTC2


1 Lch spht trin vin thng

T xa xa: Thng tin m thanh: ci, trng, ng b 1790: Thng tin quang c xa semaphore 1838: in bo Morse 1876: Bell pht minh ra in thoi 1964: Fiber optical telecommunications 1970: ARPANET (Advanced Research Projects Agency

Network) 1979: 1G - Cellular networks 1981: Analog cellular mobile phones 1982: SMTP email 1983: Internet 1988: ISDN 1998: Satellite phones 1990: 2G Digital Networks 2001: 3G High speed IP data networks 2009: 4G WiMAX v LTE

PTTC2


Dc chiu di lch svin thng

PTTC2


Thng tin quang c xa (1/2)


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PTTC2


Thng tin quang c xa (2/2)

Thp thng tin quang Nalbach, c caClaude Chappe

Ph thuc vo:

iu kin thi tit

Tm nhn

PTTC2


in bo Morse

1838 Samuel F B Morse gi dng chATTENTION, THE UNIVERSE! BYKINGDOMS, RIGHT WHEEL! qua ng dydi 16 Km

Da trn dot v dashDng nguyn l nn d liu: m ho k t

ngn hay di theo xc sut xut hin cachng

PTTC2


in bo Morse

MARK(Z)

SPACE(A) SPACE(A)

DOT

MARK(Z)

DASH

3

: Unit element

LetterALetterBLetterA 42 2

6

PTTC2


in bo Morse

- - Z- -M

- - -Y - L

- -X- -K

- -W - - -J

-V I

-U H

-T- - G

S - F

- RE

- - -Q- D

- - P- - C

- - -O- B

- N -A

InternationalCode

LetterInternational

CodeLetter

SOS = . . . - - - . . .


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PTTC2


My in bo ca Thomas Edison

PTTC2


My in thoi

Elisha Gray v Alexander Graham Bell pht minh ramy in thoi (ng k bn quyn u tin)

PTTC2


Tng i nhn cng

Dng bo hiu chung n

PTTC2


Tn gi dy in thoi

Shell Sleeve

Insulators Tip [A]

Ring [B]

Insulator

Tip [A]

Ring [B]

Sleeve


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PTTC2


Tng i strowger

PTTC2


Chuyn mch in thoi tng

PTTC2


1842 Alexander Blain, ngiScotland ch to my fax utin

1850 Frederick Bakewell, ngiAnh ci tin h thng qut nhngy nay

1910 H thng truyn fax quc tu tin ti Ty u

1920 H thng truyn fax Bc M

K thut facsimile (1/3)

PTTC2


1922 Dr. Korn truyn nh cGio Hong t La M sangNu c

1975 FCC cho php truyn fax v

modem trn PSTNThp k 80: Bng n vi s quan tm

ca ngi Nht Bn

Thp k 90: B Internet e-mail dm cht

n nay s dng rng ri fax ni ht



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PTTC2


Truyn dn: modem tng t

Nghi thc: HDLC

Nn nh:

Phng php nn mt chiu: MH(Modified Huffman)

Phng php nn hai chiu: MREAD

(Modified Relative Element AddressDesignate)


PTTC2


Nhc im ca fax

Hnh nh trng en, tnh, phn gii thp (200dpi)

Khng ph bin

Cc ph ng di

Tc truyn thp: 9.600 bps hay 14.400 bpsKhng c gi tr php l

Khng edit c

PTTC2


Trang facsimile v e-mail

PTTC2


Lch sISDN (1/2)

Nm 1977 CCITT nh ngha ISDN

ISDN Integrated Services Digital Network

ISDN Invented Services we Dont Need (?)

1985: AT&T th nghim thnh cng ISDN ln

u tin ti Hoa K Pht trin chm M do khng thng nht

trin khai gia AT&T v Nortel


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PTTC2


Lch sISDN (2/2)

Pht trin nhanh Chu u

Gn y b cc cng ngh truy xut tc cao xDSL v cable modem ln t

ISDN ph sn ngn 50 t US$ ca hn20 quc gia

ISDN Vit Nam: Game over (?)

PTTC2


Nguyn l ISDN (1/2)

- Nguyn l:Thoi (tng t) + s liu (s) = ISDN

- Basic Rate Interface:

2B + D = 144Kbps

- Primary Rate Interface:+ Bc M: 23B + D / 24B (T1)

+ Chu u: 30B + D / 31B (E1)

PTTC2


Nguyn l ISDN (2/2)

Knh B: truyn ti s liu knh 64 Kbps

Knh D: bo hiu, truyn ti s liu gi 16Kbps (BRI) hay 64 Kbps (PRI)

Knh H: knh truyn ti s liu tc cao:

+ H0: 6B

+ H10: 23B

+ H12: 30B + H11: 24B

PTTC2


ISDN BRI

Truyn dn song cng ti giao din S/T:

Dng cp UTP (u ni RJ45)

2 i dy cho 2 chiu

2 i dy cp ngun

Truyn dn song cng ti giao din U: Phng php trit tn hiu di

Phng php ping pong


9/15



PTTC2


Cu hnh ISDN BRI

NTTE1

TE1

TE1 TA

TE2

LT ET

VUS/T

R

CPE

LE

ET Exchange Terminal

LT Line TerminalNT Network Terminal

TE Terminal Equipment

TA Terminal AdapterLE Local Exchange

CPE Customer Premises Equipment

PTTC2


2 Nhng thay i trong vin thng

Thay i cng ngh, nhu cu

Thay i mi trng kinh doanh

PTTC2


Thay i v cng ngh, nhu cu

Dch v truyn ti d liu tc cao trn cpng do bng n Internet

S pht trin ca cc cng ngh gii tr gianh k thut s: hnh nh, m thanh, video,...

Cc kiu d liu ng dng mi: thc to,game 3D, bin tp video, to ni dung s,thng mi in t, gio dc trc tuyn v y

t t xa, ... S pht trin mng gia nh, SOHO S phn tn cc cng ty S pht trin ca di ng

PTTC2


Thay i mi trng kinh doanh

S chuyn hng tc quyn sang cnhtranh kinh doanh vin thng

Xu hng cho thu h tng vin thng nhiu nc

Cc cng ty cnh tranh khng nui i ngbo dng chuyn nghip m hp ng vicc hng c lp

Chuyn mn v vin thng ngy cng phbin


10/15



PTTC2


Mng cp ngy xa

PTTC2


v... nay (1/2)

PTTC2


v... Nay (2/2)

PTTC2


Nhu cu a phng tin

Truy xut cc dch va phng tin

Lin lcVit blogHi hp

Di ng

Tin nghiThng thc

Mn hnh 2 inch, cng sut 2W,khong cch 6 tc

Mn hnh 42 inch, cng sut200W, khong cch 30m

Chi trU quyn

Lin lc c nhnQung co


11/15



PTTC2


Nhu cu a phng tin

PTTC2


Nh bp Internet Mobile - Multimedia

PTTC2


3 Mng cng cng mi

Mng truy nhp:

ng: xDSL, Cable modem, PLC

Quang: FTTx

V tuyn: 2G, 2,5G, 3G

Mng li: MAN-E

Vai tr NGN khc xa vn ch l:

Tc cao Hp nht thoi, s liu

PTTC2


4 Shi t

NGNNGNNGN

Hi t

FMCFMC PerformancePerformance+ QoS+ QoS

ProviderProvider PersonalizePersonalize


12/15



PTTC2


Nn tng hi t theo NGN

K thut bo hiu: SIP

K thut ng gi d liu: IP

K thut chuyn mch v truyn dn: packet,ch lc l MPLS, MPS (GMPLS)

Hi t theo cc hng:

FMC

Performance + QoS Provider convergence: network and

application

Personalize

PTTC2


IMS

PTTC2


Decibel

Decibel

Lc u do Bell Telephone Laboratory a ral n v truyn dn transmission unit hay TU

1923 mang tn nh sng lp AlexanderGraham Bell

dBm

Ti sao dng decibel?

PTTC2


Decibel

PIN POUT

li cng sut: (dB)

= 10lg(POUT/PIN)dB li in p:(dB) = 20lg(VOUT/VIN)dB

B khuch i: li dB > 0

B suy hao: li dB < 0

VIN VOUT

1/10 ln l -10dB

10 ln l 10dB

2 ln l 3dB

Bng nhaul 0dB

Mt na l -3dB

Thangdecibel


13/15



PTTC2


Cu hi

Chn cch tnh mt bel.

A 10 log (VOUT/VIN)

B 200 log (POUT/PIN)

C 20 log (VOUT/VIN)

D 10 log (POUT/PIN)

E 100 log (POUT/PIN)

PTTC2


dBm

dBm l mc cng sut 1mW trn ti 600 ohm

dBW l mc cng sut 1W trn ti 600 ohm

600 ohm1mW

PTTC2


Ti sao dng decibel (1/2)

Php tnh logarith cho php chuyn phpnhn chia thnh php cng tr:

10dB - 2dB = 8dB

P1 P3P210dB -2dB

-2dB P3P1

PTTC2


Ti sao dng decibel (2/2)

B khuch i vsuy hao ngcnhau c gi trli ngc du

nhau Chi tit ho phn

gi tr nh


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PTTC2


Nguyn l xuyn knh (1/2)

T trng cm ng ca cc dy dn

Dng in cm ng to ra trn cc dy dn ln cn Xon i gim c xuyn knh

PTTC2


Xuyn knh u gn (NEXT)

NEXT = lg(POUT/PIN)dB Tng theo tn s vi t l lu tha 3/2 Ph thuc cng sut tc nhn NEXT theo chiu up ln hn down Xuyn knh u gn gia cc i dy cng cng

ngh tn hiu gi l SNEXT (Self NEXT)

PTTC2


Xuyn knh u xa (FEXT)

Tng theo tn s vi t l bnh phng

ng dy ngn chu FEXT ln

Thng th FEXT nh hn NEXT

Xuyn knh u xa gia cc i dy cng cng nghtn hiu gi l SFEXT (Self FEXT)

PTTC2


Gii thiu ISDN


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