1. Tổng quan hệ thống viễn thông

TRNG I HC GIAO THNG VN TI
THNH PH H CH MINH
KHOA IN - IN T VIN THNG
----------
BO CO H THNG VIN THNG

TI:
TNG QUAN MNG VIN
THNG
LP : DV13
NHM 1:
1. TRN HONG TRIU
2. CHU THNH THNG 3.
LU MNG CHNH
TP. HCM _ 3/2016

http://dichvudanhvanban.com
C 1.1 Khi nim h thng vin thng
H
1.2 Cc h thng tiu chun quc t
1.3 Phn chia dy tn ca sng v tuyn in

N 1.4 S tng qut mt h thng vin thng
G
Phn loi mng vin thng
1 1.5
http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 1

Phn cng cng vic:
S
T H v tn E-mail Nhim v Ghi ch
T
Phn 1.4 nhm trng

1 Trn Hong Triu Tranhoangtrieu6414 ( Tng hp )
@gmail.com
Phn 1.5
2 Lu Mng Chnh Liumungchanh@gmai
l.com
Phn 1.1, 1.2,

1.3
3 ChuThnh Thng Chauthanhthongdv13
@gmail.com

1.1 Khi nim h thng vin thng.
H thng vin thng l h thng truyn nhng thng tin i
xa bng sng v tuyn in.
Ngun tin Nhn tin
Tn hiu Tn hiu
Bn tin pht thu
Bn tin
TBC Mi trng TBC

Pht truyn dn Thu
M hnh h thng truyn thng 1 chiu

1.1.1 S lc v lch s pht trin thng tin
Nm S kin
3000 tr.CN Ngi Ai Cp c pht trin h thng ch vit tng

hnh.
800 Ngi Rp hon thnh h thng s vit.
1622 "Bn tin chu u" pht hnh di hnh thc bn in.
1799 Alessandro Volta pht minh ra pin in u tin.
1827 George Simon Ohm a ra nh lut Ohm I = E/R.
1831 Michael Faraday khm ph ra rng s thay i t
trng to ra in trng.

1834 Carl F. Gauss v Ernst H. Weber ch to my in bo
in t.
1937 Samuel F. B Morse pht minh ra my in tn.
1838 William F. Cooke v Sir Charles Wheatstone ch to my
in bo.
1850 Gustav Robert Kirchhoff a ra nh lut Kirchhoff I Thit
lp h thng cp xuyn i Ty Dng u tin v b
hng sau 26 ngy.
1864 James C. Maxwell d on c bc x in t.
1866 Thit lp h thng cp xuyn i Ty Dng ln th hai.
1871 T chc Hip Hi K Thut in Bo Lun n.

1876 Alexander Graham Bell nhn bng pht minh v vic
pht minh ra my in thoi (ngy 7/3/1876).
1879 Thomas A. Edison pht minh bng n in.
1884 Thnh lp Vin K Thut in Hoa K (AIEE).
1957 Lin X phng thnh cng v tinh u tin Sputnik I.

1976 Pht trin my tnh c nhn PC.
1979 RAM 64 kb m ra k nguyn ca VLSI.
1980 Bell System pht trin thng tin si quang.
1990nay K nguyn ca x l tn hiu s vi vi x l, my hin
sng s, tri ph, mng s lin kt a dch v ISDN, truyn hnh phn
gii cao HDTV, ghp knh quang...

1.2 Cc h thng tiu chun quc t.
1.2.1. Lin minh vin thng quc t.

Qu trnh thnh lp.
Ngy 17/5/1865, Cng c in tn Th gii u
tin c k kt gia 20 nc.
Ngy 01/01/1934 Lin minh in tn Quc t quyt

nh i tn thnh Lin minh Vin thng quc t
(International Telecommunication Union - ITU).

Cc t chc
ITU
ITU-R ITU-T ITU-D
- Ngoi ra cn c Vn phng Tng th k (Secretariat)
Cc lnh vc ca lin minh vin thng quc t

Mc tiu chung ca ITU
Gi vng v m rng vic hp tc quc t gia tt c
cc. Quc gia Thnh vin.
iu ha nhng hot ng ca cc quc gia thnh vin.
Thc y s hp tc v quan h i tc c hiu qu v

mang tnh xy dng gia cc quc gia v thnh vin lnh
vc nhm t c nhng mc ch trn.

Hot ng ca ITU
ITU-R nghin cu thc hin cc nhim v lin

quan n thng tin v tuyn, tn s, qu o v tinh.
ITU-T nghin cu thc hin cc nhim v lin quan

n tiu chun vin thng.
ITU-D nghin cu thc hin cc nhim v lin

quan n chnh sch v k thut pht trin vin
thng.

1.2.2. T chc chun ha quc t (ISO)
Qu trnh thnh lp.
c thnh lp vo nm 1946 v chnh thc

hot ng vo ngy 23/2/1947, tr s t ti Gevena
( Thy S ).
Ngy nay, ISO c cc thnh vin n t 163 quc gia

v 3 368 c quan k thut m nhim vic xy dng
cc tiu chun.

Mc tiu chung ca ISO.
Thc y s pht trin ca cng tc tiu chun ho

v cc hot ng c lin quan.
To thun li cho vic trao i hng ho v dch v

trn phm vi ton th gii cng nh gp phn vo
vic pht trin s hp tc trong lnh vc tr tu, khoa
hc, cng ngh v kinh t.

Hot ng ca ISO.
Hp tc cht ch vi Hi ng k thut in quc t (IEC), l

t chc chu trch nhim tiu chun ha cc thit b in.
To ra cc bo co k thut i vi cc ti liu khng th hay

khng c kh nng tr thnh cc tiu chun quc t.
n hnh cc sa li k thut.

1.3 Cch phn chia dy tn ca sng v tuyn in
TP. H Ch Minh, 3/2016

1.3Cch phn chia dy tn ca sng v tuyn in
TP. H Ch Minh, 3/2016 15

Ngun m ca con ngi
Ph ca m thanh ging ni con ngi t 20Hz
20KHz
Di ph: 300Hz 3400Hz, nhn dng ting ni
Tc pht m trung bnh t 80 n 200 t/pht
S k t trung bnh cho mi t l 5, lng quyt nh
ca mi k t l 4,775 bits/k t th ngun m c tc
bit d l 30bits/s cho n 75bits/s
Nu lng tin tht s l 1.5 Sh/k t th lng tin
trung bnh ngun tht s pht ra l h = 10 n 25
Sh/s.

1.4 S tng qut mt h thng vin thng

Qu trnh bo mt

H thng m ha i xng (Symmetric
Cryptosystems)

H Thng M Ha Bt i Xng (Asymmetric
Cryptosystems).

Thut ton Rivest Shamir Adleman (RSA)

M knh v gii m knh

Qu trnh dn knh n phn knh

Tri ph trc tip (DSSS)

Tri ph nhy tn (FHSS)

Tri ph nhy thi gian

Qu trnh tri ph trc tip

1.5 Phn loi mng vin thng
Mng in thoi
Mng
vin Mng my tnh
thng
Mng Internet

1.5.1. Mng in thoi
1.5.1.1. Mng PSTN (Public switch telephone network).
a. Cu trc phn cp
mng PSTN.
-Mng ng trc: thc hin
cc cuc gi ng di.
-Mng ni ht: thc hin cc

cuc gi ni ht.

1.5.1. Mng in thoi
1.5.1.1. Mng PSTN (Public switch telephone

network).
-PSTN s dng k thut

chuyn mch knh. V
vy n hot ng theo
phng thc hng kt
ni (connectect-oriented).

1.5.1 Mng in thoi
1.5.1 Mng PSTN (Public switch telephone network).
Dng thng tin c truyn

tr, mt githp
lin tc, tc cao
u im
- Click to add Text
Bng thng knh m bo - Click to add Text
An ton trn ng truyn
(c nh 64kb/s) - Click to add Text
Contents

1.5.1 Mng in thoi
1.5.1.1 Mng PSTN (Public switch telephone

network).
Chi ph u t trang Mi si cp ch s dng cho

thit b ln mt in thoi
Nhc
im
- Click to add Text
Chi ph gi kh t, c Lng ph bng thng
- Click to add Text
bit l gi quc t ng truyn
- Click to add Text
Contents

1.5.1 Mng in thoi
1.5.1.2 Mng in thoi di ng

-Mng in thoi di ng cung cp kh nng di ng cho thu
bao trong qu trnh thc hin thng tin lin lc.
S liu thng k ca IUT v s thu bao di ng t bo 2013

1.5.1 Mng in thoi
1.5.1.2 Mng thng tin di ng
Cu trc mng thng tin di ng t bo.

1.5.1 Mng in thoi
1.5.1.2.1. Ti s dng tn s
- Nguyn l c s thit k cc h thng t ong l cc nhm
c gi l cc mu ti s dng tn s.

1.5.1.2.1. Ti s dng tn s

1.5.1 Mng in thoi
Mt s m hnh ti s dng tn s
-Mu ti s dng tn
s 3/9: c ngha cc
tn s s dng c
chia thnh 9 nhm
trong 3 v tr trm
gc.
-Khong cch gia

cc ng knh:
D=3R

1.5.1 Mng in thoi
Mt s m hnh ti s dng tn s
-Mu ti s dng tn
s 4/12: c ngha cc
tn s s dng c
chia thnh 12 nhm
trong 4 v tr trm
gc.
-Khong cch gia

cc ng knh:
D=4.58R

1.5.1 Mng in thoi
H s ti s dng tn s
-H s ti
s dng
tn s
Q=3N
+Q nh: dung lng cao.

+Q ln: cht lng ng truyn tt.

1.5.1 Mng in thoi
1.5.1.2.2 K thut ghp knh.
- lm tng dung lng ca di v tuyn ngi ta s dng k

thut ghp knh: c 3 hnh thc ghp knh thng dng nht l:
+ FMDA (Frequency division multiple access): a truy

nhp phn chia theo tn s.
+ TMDA (Time division multiple access): a truy nhp
phn chia theo thi gian.
+ CMDA (Code division multiple access): a truy nhp
phn chia theo m.

1.5.1 Mng in thoi
1.5.1.2.2 K thut ghp knh.

1.5.2 Mng my tnh
1.5.2.1 Khi nim
Mng my tnh: l mt nhm cc my tnh kt ni vi nhau thng

qua cc my tnh trao i thng tin qua li cho nhau.

1.5.2 Mng my tnh
1.5.2.2 Cu hnh ng dy

1.5.2 Mng my tnh
1.5.2.3 CH TRUYN DN

1.5.2 Mng my tnh
1.5.2.4 Tp mng

1.5.2 Mng my tnh
1.5.2.5 CC DNG MNG

1.5.3 Mng Internet
1.5.3.1 Khi nim.
Internet l g?
-Internet( Inter-network) l
mng my tnh rt rng kt ni
cc my tnh khc nhau nm
ri rng khp ton cu.
Cc mng ny c lin kt
vi nhau da trn b giao thc
TCP/IP.

1.5.3 Mng Internet
1.5.3.2 Cu trc mng Internet.
- kt ni 2 mng con vi nhau c 2 vn :

+ Vn th nht: kt ni vt l.
+ Vn th hai: kt ni mng.
Net 1 Router Net 2

3.Mng Internet
1.5.3.2 Cu trc mng Internet.
Kin trc tng th mng Internet

1.5.3 Mng Internet
1.5.3.3. Phng thc kt ni Internet.
-C 2 phng thc
kt ni chnh:
+Kt ni qua modem

.
+Kt ni thng qua
mng cc b kt
ni internet.

1.5.3 Mng Internet
1.5.3.4 a ch IP v tn min.
-Cc my tnh trn Internet phi lm vic theo giao thc

thc TCP/IP nn i hi phi c a ch IP v a ch IP mi
mng l duy nht.

1.5.3 Mng Internet
1.5.3.4 a ch IP v tn min.
- Khi mun s dng dch v t mt my tnh no vic nh

a ch IP s rt kh nh. Nh vy a ch IP s c gn 1
mt ci tn tng ng d nh c gi l tn min
-VD: My ch ca cng ty Intel c tn min l intel.com

th a ch IP s l 192.102.198.160 (s dng chng
trnh nslookup tra)

Cu trc tn min
TP. H Ch Minh, 3/2016 53
1.5.3 Mng Internet
1.5.3.5 Cc dch v Internet.
- Nghe nhc, xem phim trc

tuyn
- Gi th in t
- Truyn, ti tp tin
- Chat
- Tm kim thng tin

Ti liu tham kho:
1.Tng quan v h thng vin thng, Hc vin Cng ngh Bu chnh Vin thng .
2. http://
forum.bkav.com.vn/forum/bkav-other/kinh-nghiem-thu-thuat/22947-nguyen-ly-
ma-hoa-du-lieu
3. http://
www.slideshare.net/hainguyenhoangtmdt/chuong-4-ma-hoa-du-lieu-trong-an-to
an-va-bao-mat-he-thong-thong-tin-doanh-nghiep
4.TS.V nh Thnh, H thng vin thng, Nh xut bn i hc quc gia Thnh
Ph H Ch Minh, 2011.
5.TS.Nguyn Phm Anh Dng, L thuyt tri ph v a truy nhp v tuyn, Hc
vin Cng ngh Bu chnh Vin thng, H Ni - 2006.
6.ThS. Nguyn Duy Phng, Nhp mn Internet v E-learning,
Hc vin Cng ngh Bu chnh Vin thng.
7. Behrouz A. Forouzan, Data communications and networking, fourth edition
8. http://baigiang.co/bai-giang/tai-su-dung-tan-so-trong-mang-to-ong-670
9. http://tai-lieu.com/tai-lieu/thong-tin-di-dong-te-bao-2776/
LOGO
Cm n thy v cc bn
lng nghe!

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TRNG I HC GIAO THNG VN TI

BO CO H THNG VIN THNG

TP. HCM _ 3/2016

1.3 Phn chia dy tn ca sng v tuyn in

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 1

Phn 1.4 nhm trng

Phn 1.1, 1.2,

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 2

Ngun tin Nhn tin

TBC Mi trng TBC

M hnh h thng truyn thng 1 chiu

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 3

3000 tr.CN Ngi Ai Cp c pht trin h thng ch vit tng

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 4

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 5

1957 Lin X phng thnh cng v tinh u tin Sputnik I.

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 6

1.2.1. Lin minh vin thng quc t.

Ngy 01/01/1934 Lin minh in tn Quc t quyt

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 7

ITU-R ITU-T ITU-D

- Ngoi ra cn c Vn phng Tng th k (Secretariat)

Cc lnh vc ca lin minh vin thng quc t

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 8

iu ha nhng hot ng ca cc quc gia thnh vin.

Thc y s hp tc v quan h i tc c hiu qu v

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 9

ITU-R nghin cu thc hin cc nhim v lin

ITU-T nghin cu thc hin cc nhim v lin quan

ITU-D nghin cu thc hin cc nhim v lin

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 10

Qu trnh thnh lp.

c thnh lp vo nm 1946 v chnh thc

Ngy nay, ISO c cc thnh vin n t 163 quc gia

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 11

Thc y s pht trin ca cng tc tiu chun ho

To thun li cho vic trao i hng ho v dch v

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 12

Hp tc cht ch vi Hi ng k thut in quc t (IEC), l

To ra cc bo co k thut i vi cc ti liu khng th hay

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 13

TP. H Ch Minh, 3/2016

TP. H Ch Minh, 3/2016 15

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 16

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 17

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 18

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 19

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 20

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 21

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 22

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 23

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 24

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 25

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 26

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 27

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 28

1.5.1.1. Mng PSTN (Public switch telephone network).

-Mng ni ht: thc hin cc

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 29

1.5.1.1. Mng PSTN (Public switch telephone

-PSTN s dng k thut

http://dichvudanhvanban.com TP. H Ch Minh, 3/2016 30

1.5.1 Mng PSTN (Public switch telephone network).