Nội Dung học Phần Mạng Viễn Thông

8/14/2019 Ni Dung hc Phn Mng Vin Thng

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Mng vin thng

GV: Nguyn Th Thu HngDT: 04-33519387

[email protected]@yahoo.com

B mn Mng vin thngKhoa vin thng 1- PTIT

GV:Nguy

n

ThThu

Hng

2008

Ni dung hc phn Mng vin thng

L thuyt: Gii thiu chung v mng vin thng Cc mng chuyn mch knh Cc mng chuyn gi Mng IP Xu hng pht trin mng v dch v vin thng

Bi tp: Gm phn t chn v phn bt buc(xem file ring) Thi vit cui k (cu hi n tp l phn bi tp)

GV:Nguy

n

ThThu

Hng

2008

Yu cu bi tp Mng vin thng

Phn 1: Gii thiu chung v mng vin thng Cu 1: Nu khi nim mng vin thng. Mng vin thng bao gm nhng

phn tg? Cho v d.

Cu 2: Trnh by khi nim d

ch v

vi

n thng v m

ng mang d

ch v

. Phn 2 : Cc mng chuyn mch knh v chuyn gi

Cu 3: Nu nhng u im ca phng thc truyn gi so vi phngthc truyn knh?

Cu 4: Phn tch v so snh c im ca mng FR v ATM Phn 3 : Mng IP

Cu 5: Trnh by chc nng cc lp ca m hnh giao thc TCP/IP. Sosnh TCP vi UDP

Cu 6: Trnh by cu trc gi tin IPv4 v cc phn lp a ch IPv4 Cu 7: Trnh by v gii thch cc u nhc im ca cng nghVoIP Cu 8: Trnh by cc tham sQoS ch yu trong mng VoIP

GV:Nguy

n

ThThu

Hng

2008

Yu cu bi tp Mng vin thng

Phn 4 : Xu hng pht trin mng v dch v Cu 9: Phn tch xu hng pht trin mng vin thng v dch v

Cu 10: Nu khi nim NGN. Phn tch 4 c im c bn ca NGN. Phn 5 : Bi tp m rng (BT BUC)

Vm hnh phn lp chc nng, cu trc vt l ca mng cung cpdch v v gii thch cchhotng cbn camt trong ccdch v sau: 1719, 1800, 1900, VoD, VPN, IPTV, Thoi qua trangweb, Qun l ti nh, o to txa qua mng ISDN hoc NGN, Trchi tng tc, thc tio, Truyn hnh hi nghNGN, Bn hng quamng Internet.


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Chng 1:Gii thiu chung v mng vin

thng

GV:Nguy

n

ThThu

Hng

2008

Ni dung chng 1

1.1 Cc phn tcu thnh mng vin thng 1.2 Dch v vin thng v mng mang dch v 1.3 Phn loi mng vin thng

GV:Nguy

n

ThThu

Hng

2008

Khi nim vin thng

Vin thng

n hng Song hng

Truynthanh

Truynhnh

Truynhnh vtuyn

Truynhnhcp

inbo

Telex inthoi

cnh

inthoi

ding

Truyndliu

Thint

Truynhnhhingh

GV:Nguy

n

ThThu

Hng

2008

Cc phn tcu thnh mng vin thng

Node (nt) Link (lin kt) Terminal (thit bu cui) Network

equipment (thitb mng)

Node

TBDC

Ni ti vng khc

Mng truyn dn

Node

Node

Node

TBDC

TBDC

TBDC

TBDC

TBDC

TBDC

TBDC

u l nt v lin kt?u l cc thit b mng v thit b u cui?


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GV:Nguy

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ThThu

H

ng

2008

Cc phn tcu thnh mng vin thng Khi nim v nt v lin kt

Nt l mt im trung gian trn mng vin thng ni thchin kt ni tm thi gia cc u vo v u ra theo yucu.

Cc lin kt l cc ng truyn dn tn hiu lin tc giahai im trn mng. Mt lin k t c th l mt mt ng

truyn dn vt l, mt bng tn trong h thng ghp knhtheo tn s hay mt khe thi gian trong h thng ghpknh theo thi gian. Cc lin kt y ngoi mi trngtruyn dn cn bao gm c cc phng tin kt ni

chng. GV:Nguy

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ThThu

H

ng

2008

Cc phn tcu thnh mng vin thng Khi nim v nt v lin kt

Ntmng

Ntmng

Ntmng

Linkt

Lin

kt

Lin kt

Thubao

Thu

bao

Thubao

GV:Nguy

n

ThThu

Hng

2008

Cc phn tcu thnh mng vin thng Cc thit b mng

Mng vin thng l tp hp cc thit b mng c kt ni vinhau theo mt cu trc, kin trc nht nh v c thit lp,qun l nh cc h thng qun l tin cy.

Trong mng in thoi chuyn mch cng cng PSTN cc thitb mng c k n nh: Tng i, b tch ghp knh, b tptrung thu bao xa, thit b bo hiu, thit b truyn dn, Trongmng my tnh: router, hub, gateway, bridge, Trong mng ding: tng i MSC, cc trm chuyn tip BSC, trm thu phtsng BTS, gateway, trong mng VoIP: Gateway, gatekeeper,signaling gateway,

Nhvy, ta thy cc thit b trong cc mng vin thng rtang dng v chng loi tuy nhin xu hng chung hin nay lcc thit b s ngy cng a nng (tch hp), thng minh, bomt v gn nh hn.

GV:Nguy

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ThThu

Hng

2008

Cc phn tcu thnh mng vin thng

Thit b u cui Thit b u cui (Terminal Device) l thit b giao tip vi ngi

s dng v l cu ni gia ngi s dng v mng. Thit b ucui c nhiu loi, chng rt khc nhau v chc nng v yucu dch v. V d: in thoi, my tnh, my Fax, V tr v chc nng, dng thc thng tin


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GV:Nguy

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ThThu

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2008

Dch v vin thng v mng

mang dch v Dch v vin thng

"Dch v vin thng"l dch v truyn khiu, tn hiu, s liu,ch vit, m thanh,hnh nh hoc ccdng khc ca thngtin gia cc im ktcui thng qua mng

vin thng. Mng mang dch v

PC

Fax

1 2 3

4 5 6

7 8 9

*8 #

M odem

Ngi s dngdch v vin thng

Mng vin thng

Nh cung cp dch v

Nh cung cp h tng mng

GV:Nguy

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ThThu

H

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2008

Dch v vin thng v mng mang

dch v

Cc quan im phn loi dch v vinthng Phn loi theo loi tin tc: thoi, d liu,

hnh nh

Phn loi theo mng: PSTN, ISDN, ding, Phn loi theo tnh cht dch v:

online/offline, c nh/di ng,

GV:Nguy

n

ThThu

Hng

2008

Dch v vin thng v mng mangdch v

Ngoi ra, cn c th phn loi theo

ngi s dng dch v v theo nhcung cp dch v: Theo ngi s dng:

Dch v c bn Dch v Internet Dch v gi tr gia tng Cc dch v trn nn mng th h sau.

GV:Nguy

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ThThu

Hng

2008

Phn loi mng vin thng Theo tin trnh lch s Theo tnh cht k thut v cng ngh

Phn loi mng vin thng


5/595

GV:Nguy

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ThThu

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Theo tin trnh lch sPhn loi mng vin thng

Mng tin in bo trc khi c Morse

(Primitive Telegraph before Morse)

GV:Nguy

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ThThu

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Mngin bo ca Samuel Morse

GV:Nguy

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ThThu

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Theo tin trnh lch s


Mngin thoi cng cng

Tngi

Tngi

T ng

i

Tngi

Ni ti vng khc

Mng truyn dn

GV:Nguy

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ThThu

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2008

Theo tin trnh lch s


Mng truyn s liu: truyn s liu gia cc my

tnh d liu. Thng gp l mng X25 (chuyn gi) v FR (khung)

X21X25

Frame relay


6/596

GV:Nguy

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ThThu

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Mng thng tin di ng

Mng in thoi t ong cm tay u tin

GV:Nguy

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ThThu

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2008

Theo tin trnh lch sPhn loi mng vin thng Mng my tnh: Cu trc

Hnh sao (star) Chu trnh (loop) Li (mesh) Cy (tree)

Vng (ring) Xa l (bus)

GV:Nguy

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ThThu

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2008

Theo tin trnh lch s


Mng my tnh

Thit bu cui (Users)

Cc nt mng

Printer

GV:Nguy

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ThThu

Hng

2008

Phn loi mng vin thng theo tnh cht kthut v cng ngh

Cng ngh chuyn knh PSTN ISDN GSM

Cng ngh khung (FR) Cng ngh gi

X25 ATM IP Cc mng tng lai



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Chng 2:

Cc mng chuyn mch knh

GV:Nguy

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ThThu

H

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2008

Ni dung Mng in thoi chuyn mch cng cng (PSTN)

Cu trc mng PSTN Khoch nh sv nh tuyn trong PSTN

Mng stch hp a dch v (ISDN) Tin xy dng mng ISDN Cu hnh tham chiu Cc loi knh v giao tip trong ISDN

Bo hiu Bo hiu thu bao Bo hiu knh lin kt (CAS) R2 Bo hiu knh chung (CCS) CCS7

GV:Nguy

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ThThu

Hng

2008

Mng in thoi chuyn mch cngcng (PSTN)

PSTN: Public SwitchedTelephone Network Mng in thoi chuyn

mch cng cng L mng dch v pht trin

rt sm Cung cp dch v thoi v

phi thoi L mng vin thng lu i

nht v ln nht (hn 1 tthu bao -2006)

Tngi

Tngi

Tngi

Tngi

Ni ti vng khc

Mng truyn dn

GV:Nguy

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ThThu

Hng

2008

Bn cht PSTN l mt mng hot ng theo

phng thc mch (circuit mode)

theokiu kt ni c hng (connection-oriented)gm 3 pha: s dng cc h thng bo hiu. Thit lp kt ni (setup) Duy tr kt ni (conversation) Xo kt ni (released).

Mng in thoi chuyn mch cngcng (PSTN)


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GV:Nguy

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ThThu

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c im ch yu ca PSTN: Truy nhp analog 300-3400 Hz

Kt ni song cng chuyn mch knh

Bng thng chuyn mch 64kb/s hoc 300-3400Hzi vi chuyn mch analog

Khng c kh nng ding hoc ding rt hnch

C nhiu chc nng tngng vi mng N-ISDN

Mng in thoi chuyn mch cng

cng (PSTN)

GV:Nguy

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ThThu

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Tng i

Tng i Tng i

Analog AnalogS

elephone Chuynmch s

Hnh 2.1: Mng IDN (Mng s tch hp ging PSTN)

Mng in thoi chuyn mch cng

cng (PSTN)

GV:Nguy

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ThThu

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Telephone - in thoi c nh Fax Cordless: my ko di PC+MODEM PBX

PSTN

Cc thit b pha u cui

in thoi c nh

GV:Nguy

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ThThu

Hng

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Telephone - in thoi c nh

L mt thit b u cui Analog, hot ng song cngFDX (Full Duplex), thit b ny to ra hai knh tingni ngc chiu nhau va l my thu va l mypht khng cn qua mt qu trnh chuyn i no.

S dng h thng bo hiu chun gi l bo hiu thubao Analog ging nhmodem, fax, cardphone

Truy cp vo mng qua ng dy (mch vng thubao)

PSTN

Cc thit b pha u cui


9/599

GV:Nguy

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ThThu

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PSTN

Cc thit b pha u cuiT.line

RJ-11

Mch bov

SW

Mch thuchung

Mch chng ngccc ngun nui

Mchquay s

Mchtrit clickMy pht thoi

Mch cn bng

Mch thu thoi

Hybrid Mch kh.iiu chnh

ngni

ngnghe

S khi in thoi c nh GV:Nguy

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ThThu

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PSTN

Cc thit b pha u cui

Hybrid

Ph t

Thu

Mch cnbng

Hybrid

P1

P2

VF

300-3400 Hz VF

Ca tng i

Mch cnbng

HybridVng dy thu bao

GV:Nguy

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ThThu

Hng

2008

Fax Trao i vn bn tnh v hnh nh tnh trn mt trang

giy i vi PSTN hin nay ngi t a s dng my fax G3

c thit k ph hp vi ng dy in thoiAnalog. Ngoi Fax G3 cn c Fax G4 cho ISDN v myfax th h c G1, G2.

Dng cng ngh x l tnh hiu s chuyn t hnhnh trn vn bn s nh mt thit b qut nh(scanner), tn hiu s mang hnh nh ca bn gc(origin) chuyn qua mt kt ni ca mng PSTNmy thu, c b phn in in hnh nh trnmt trang giy (copy).

PSTN

Cc thit b pha u cui

GV:Nguy

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ThThu

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Fax Mt cuc lin lc fax cng ging nh lin

lc thoi v phn quay s, tnh cc.Hot ng y khc vi hot ngtrong in thoi.

L mt thit b bn song cng thngtin mt chiu.

My fax G3 c modem t trong my(buildin) chuyn t tn hiu s VF(Voice Frequency). hng ngc:chuyn i ngc li, tVF Digital .

PSTN

Cc thit b pha u cui


10/5910

GV:Nguy

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ThThu

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Cordless: in thoi ko di(m con) L mt TBC ca mng PSTN to

ra nh c lin k t v tuyn giahai b phn ca h thng cordless(Base Unit v Handset) m handsetc th di ng trong mt phm vihp.

c kh nng di dng trong phm vi

hp d b va chm tn s, khng tincy v s dng cng nghAnalog

PSTN

Cc thit b pha u cui

GV:Nguy

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ThThu

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PC+MODEM

PSTN

Cc thit b pha u cui

Tng i

Tng i Tng i

Analog AnalogS

PC Modem Chuynmch s

S

GV:Nguy

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PBX

PSTN

Cc thit b pha u cui

GV:Nguy

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ThThu

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2008

Phn cp qun l S dng cu trc phn

cp trong cc mngin thoi c th lmn gin cng tc qunl mng v n gin

trong thit k chuynmch.

Xu hng hin nay lgim cp trong phncp mng v cung cpthm nhiu tuyn thayth

Vi Vit Nam Cp quc t Cp lin tnh

Cp ni ht

Cu trc mng PSTN ca Vit Nam

Gateway

Hanoi AXE-

105

Gateway

HCM city

AXE-105

Gateway

Danang

AXE-105

Transit

Hanoi 1

TransitHanoi 2

TransitDanang

Transit

HCM 1

TransitHCM 2

Local Exchanges

Area 1

Local Exchanges

Area 3

Local Exchanges

Area 2

International

layer

National layer

Local layer

Vietnamese Network Hierarchy


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GV:Nguy

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ThThu

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K hoch nh s Mcch chnh ca k hochnh s l gn cho mi thu

bao v d ch v mt m duy nh t, n gin c th thitlp cuc gi mt cch t ng.

Theo quy tc, mi mng mang khc nhau s c cc k hochnh s hoc cc sery khc nhau: PSTN, PLMN

K hochnh s h tr tin trnh thit lp cu c gi, cbit l trong vi c chn tuy n trong cc t ngi v vi c ktlin mng gi a cc m ng mang, ng thi to nn tng cbn cho vi c tnh c c cuc gi.

PSTN

Mt skhoch c bn

GV:Nguy

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ThThu

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Phng php nh s M thu bao (SC- Subscriber code) M tng i (Local Exchange code) M vng (AC- Area code) M nc (Country code) M c bit i vi cuc gi lin tnh dng tin t 0+AC+TN i vi cuc gi quc t dng tin t 00+CC+AC+TN Hin nay ngi t a s dng AC (Area Code) vi 2 ngha:

m vng v m mng

PSTN

Mt skhoch c bn

GV:Nguy

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ThThu

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Phng php nh tuyn PSTN hot ng theo phng thc circuit mode thc

hin phng php nh tuyn cuc gi thc hin

mt kt ni qua mng, mi cuc gi c nh tuyn mtln to r a mt kt ni, kt ni ny c duy tr trong sutthi gian m thoi.

C nhiu phng php nh tuyn nh nh tuyn tnh vnh tuyn ng. nh tuyn tnh l nh tuyn khng thay i theo thi gian

v trng thi, khi chn hng ra ca cuc gi. nh tuyn ng khi chn hng ra ca mt nt ph thuc

vo trng thi mng ti tng thi im.

PSTNMt skhoch c bn

GV:Nguy

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nh tuyn ti tng i ni ht (LE)

PSTNMt skhoch c bn

Mng ni ht

LELE

0 , 00Trung k

1xy

Dch vcbit

xyni ht

Mng quc gia


12/5912

GV:Nguy

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ThThu

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Bo hiu Bo hiu thu bao Bo hiu knh lin kt (CAS) Bo hiu knh chung (CCS)

Gii thiu chung v bo hiu lin i Hin nay c nhiu h thng bo hiu gia cc tng i, phn chia

lm hai loi CAS, CCS (Channel Associated Signaling Bo hiuknh kt hp v Common Channel Signaling- Bo hiu knh chung). CAS: gia cc tng i phi c cc thng tin bo hiu chia thnh cc

knh bo hiu, mi knh c gn cho mt knh thoi. Thng tin bohiu trn knh bo hiu s cho bit v kt ni l in quan ti knhthoi c gn kt. Trong mt s trng hp s dng cc knh thoitruyn thng tin bo hiu cho k t ni lin quan ti chnh n.

CCS: lin kt bo hiu gia hai tng i s dng chung cho tt c ccknh thoi ni gia hai tng i bng cch ghp gi.

Bo hiu

GV:Nguy

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Chu trnh bo hiu (thu bao in thoi c nh)

PSTN

Bo hiu thu bao Analog Calling A LE Calling B

Nhc

Quays

tmy

Hook off

Dialing tone

nh tuynPulse/tone

Ringing tone Ringing signal

Hook off

Nghe/Tha my

VF m thoi VF

Hook on Busy tone

Hook on tmy

GV:Nguy

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ThThu

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Bo hiu lin i:

Bo hiu lin i

Tng i

Tng i Tng i

Bo hiu lin iBo hiu thu bao Bo hiu thu baoGV:Nguy

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Gii thiu chung v bo hiu lin i Vit Nam hin nay s dng hai loi h thng bo

hiu lin (tng) i: H thng bo hiu knh k t hp/knh ring R2 (ChannelAssociated Signalling)

H thng bo hiu knh chung s 7 CCS7 (Common ChannelSignalling number 7) cn gi l S7 hay SS7 (SignallingSystem Number 7 - H thng bo hiu s 7).

Bo hiu


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GV:Nguy

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ThThuH

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Gii thiu chung v bo hiu lin i Bo hiu R2:

Bo hiu trng thi (state) Bo hiu thanh ghi (register)

Exchange

AExchange

BCall

Channel 1

Channel 30

TS 16

TS 16

Channel 1

Channel 30

2 dy4 dy

2 dy

Bo hiu knh kt hp

Bo hiu

GV:Nguy

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ThThuH

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Gii thiu chung v bo hiu R2 Bo hiu thanh ghi

Mc ch: Cc tng i lin quan ti mt cuc gi thng bocho nhau nhng thng tin cn thit thc hin kt ni.

V d: ch ca kt ni, thuc tnh ca my b gi, thuc tnh camy ch gi

Bo hiu thanh ghi ch din ra khi xut hin cuc gi, giaion thit lp kt ni.

Bo hiu thanh ghi khng s dng TS 16 m s dng chnhngay knh thoi va chim gi thng tin bo hiu thanh ghi.

Trong giai on bo hiu thanh ghi, cuc m thoi cha dinra, cc ng trung k b cuc gi chim nhng chatruyn ti ting ni.

Bo hiu

GV:Nguy

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Gii thiu chung v bo hiu R2 Bo hiu thanh ghi

Bo hiu thanh ghi din ra theo 2 hng i v v.

Thng tin bo hiu thanh ghi c m t bi tn hiu Analogtheo mt chun chung gi l MF. Ngi ta dng hai tn hiu hnh sin nm trong bng tn thoi

to ra tn hiu t hp (theo bng). Cc tn hiu hng i v vnh s theo 1.2.315 v tn hiu a tn hng i c tn scao hn tn hiu a tn hng v.

Bo hiu

GV:Nguy

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XX

15

XX14

XX13

XX12

XX11

XX10

XX9

XX8

XX7

XX6

XX5

XX4

XX3

XX2

XX1

Back ward Hng v54066078090010201140

Forward Hng i198018601740162015001380Tn hiu

Bo hiu thanh ghi


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GV:Nguy

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- nt -II-15Bo ht cc digit sI-15

- nt -II-14I-14

- nt -II-13Cuc gi ny i ti my t vn hnhI-13

- nt -II-12L tng i sau yu cu tng i trckhng c chim (tip) nhn

I-12

D tr cho quc giaII-11Truy nhp ti dch v c bitI-11

Ch gi l in thoi vin quc t (hoc c chc nng quct)

II-100I-10

Ch gi l thu bao u tin gi i quc tII-99I-9

Ch gi l my ng k truyn d liu quc tII-88I-8

Ch gi l thu bao khng c chc nng chuyn cuc giII-77I-7

Ch gi l my truyn d liuII-66I-6

Ch gi l in thoai vinII-55I-5

My d tr s dng quc giaII-44I-4

My ch gi l my bo trII-33I-3

My ch gi l my thu tin/u tinII-22I-2

Ch gi l thu bao bnh thng (TB khng ghi tn)II-11I-1

Hng iNhm IIHng iNhm I

Bo hiu thanh ghi

GV:Nguy

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D trB-15D trA-15

D trB-14D trA-14

D trB-13D trA-13

D trB-12D trA-12

D trB-11D trA-11

D trB-10D trA-10D trB-9D trA-9

My b gi ang hngB-8Pht li 3 s trc (n-3)A-8

Thu bao b (ch) gi khng tnh ccB-7Pht li 2 s trc (n-2)A-7

Thu bao b (ch gi ??) gi ri, c tnh ccB-6Bo hiu kt thc thit lp trng thi thoiA-6

S b gi khng s dng (s my khng c trnmng)

B-5 nhn digit v gi tip loi ch gi-Ln pht A5 u tin loi ch gi- Ln pht A5 tip s ch giGi loi cuc gi (II) nu c A 5 ti p t he o s gi s chgi

A-5

Nghn pha trcB-4Bo hng nghn mchA-4

Thu bao b gi ang bnB-3Gi thng bo v loi ch gi (nhm II) v nhn thngbo theo ngha B.(Chuyn sang thu theo bnB vgi t nhi u nhmII)

A-3

Thu bao b gi chuynB-2Pht li mt ch s trc (n-1)A-2

Thu bao b gi ri v yu cu truy tm cuc g iquy ph

B-11140Hz-1020Hz gi con s tip theo (n+1)A-1

Hng vNhm BHng vNhm A

GV:Nguy

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PSTN : Bo hiu R2

A B

091824678

I9

A1

I1

A1

I8

A2

I1

A3

GV:Nguy

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H thng bo hiu s 7 Khi nim u im Cc phn t M hnh tham chiu Phn chuyn giao bn tin MTPV d v bo hiu trong ISDN

Bo hiu knh chung s7


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Khi nim bo hiu lin i

Tng i Tng i

My in

thoi My in

thoi

Bo hiu thubao

Bo hiu thubao

Bo hiu lin

i

Bo hiu lin i c phn chia thnh bo hiu knh kt hp (CAS) v bo hiu knhchung (CCS). i h thng bo hiu knh kt hp, cc tn hiu c thu v pht trn cngmt ng vi tn hiu ting ni. Trong khi , bo hiu knh chung tn hiu bo hiuc thu v pht qua mt ng dnh ring cho bo hiu khc vi knh ting ni. G

V:Nguy

n

ThThuH

ng

2008

H thng bo hiu s7 H thng bo hiu s 7 l h thng bo hiu

knh chung, c nhim v truyn thng tin bohiu gia cc tng i vi nhau thit lp,kt ni, qun l v gim st cc phin truynthng (cuc gi thoi, truyn s liu, hnhnh).

GV:Nguy

n

ThThu

Hng

2008

u im SS7 Cu trc modun vi kin trc lp cho php nhanh chng a

vo cc dch v mi. Nhanh: Trong hu ht cc trng hp, thi gian thit lp

cuc gi t hn 1 giy. Dung lng cao: Mt knh bo hiu c th x l tn hiu bohiu cho hng nghn cuc gi cng lc.

Kinh t: t i hi thit b bo hiu hn so vi cc h thngkhc.

Tin cy: Mng SS7 c tin cy rt cao nh s dng cctuyn v nt bo hiu d phng. C kh nng t ng iuchnh cu hnh mng c lp vi mng thoi.

Linh hot: H thng c th cha nhiu tn hiu, c th sdng cho nhiu mc ch ch khng chdnh cho dch vthoi. G

V:Nguy

n

ThThu

Hng

2008

Cc phn t trong SS7

SP (signaling point): im/nt bo hiu (trong mng PSTN, SPthng l cc tng i t cp host tr ln).

STP: im chuyn giao bo hiu, l mt nt trong CCS7chuyn tip cc bn tin bo hiu t lin kt ny n lin k tkhc.

SL (signaling link): Gia cc im bo hiu c lin k t vinhau bng lin kt bo hiu. y l mt knh truyn dn s,trn cc bit chm ho thng tin tn hiu. Cc lin kt bohiu c thit k vi tin cy rt cao ngha l kh nngnghn mch trong trao i thng tin bo hiu him khi xy ra.


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GV:Nguy

n

ThThuH

ng

2008

Cc phn t trong SS7

GV:Nguy

n

ThThuH

ng

2008

Cc phn t trong SS7

GV:Nguy

n

ThThu

Hng

2008

M hnh tham chiu ca SS7

GV:Nguy

n

ThThu

Hng

2008

Phn chuyn giao bn tin MTP

MTP (Message Transfer Part): Phn chuyn giao tinbo (hay cn gi l phn chuyn giao bn tin bo

hiu trong CCS7) Bao gm cc chc nng chung i vi tt c cc bn

tin, nhng chc nng ny cung cp kh nng chuyncc bn tin mt cch tin cy v trong sut gia cci tng s dng ca mng bo hiu v ni dungmi bn tin bo hiu l hon ton c lp vi nhau.


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17

GV:Nguy

n

ThThuH

ng

2008

Phn chuyn giao bn tin MTP Nh MTP, cc bn tin bo hiu s c chuyn

giao: ng: Tt c cc bn tin mo phi c sa li

trc khi chng c chuyn giao ti phn cangi s dng bn thu/nhn bn tin.

c sa li lin tip.

Khng b tn tht hoc lp li.

GV:Nguy

n

ThThuH

ng

2008

Phn chuyn giao bn tin MTP MTP gm 3 lp l MTP1, MTP2 v MTP3

MTP1 nh ngha cc phng tin vt l dng chuyn thng tin t im ny ti im khc, n lgiao din vi ti thng tin. knh d liu cc thit b u cui truy nhp ti h thng chuyn mch

MTP2 thc hin cc chc nng ng bo hiu, bao gm iu khin thu (ti lp 3) iu khin pht (t lp 3) iu khin trng thi knh Pht hin li, phn tch bn tin, kt ni (gia cc phn thu, pht

n lp 1)

GV:Nguy

n

ThThu

Hng

2008

Phn chuyn giao bn tin MTP MTP2: Bn tin lp 2 tng t bn tin lp 2 ca h

thng truyn d liu. C 3 loi SU c s dng vi 3 mc ch khc

nhau: MSU: l mt n v tn hiu c cha bn tin bo hiu

n>2

LSSU: l mt n v tn hiu khng cha bn tin bohiu m cha thng tin v trng thi ca lin kt bohiu (SIO+SIF=SF =8 hoc 16bit)

FISU: l mt n v tn hiu lp y khong ri khitrn lin kt bo hiu khng truyn bn tin bo hiuhay trng thi lin kt bo hiu. SIO + SIF = 0

GV:Nguy

n

ThThu

Hng

2008

Phn chuyn giao bn tin MTP


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18

GV:Nguy

n

ThThuH

ng

2008

Phn chuyn giao bn tin MTP BSN: ch s th t SU v pha sau (hng v) BIB:

bt ch th hng v FSN: ch s th t SU v pha trc (hng i)

FIB: bt ch th hng i LI: ch th v di, ch th s octet trong cc trng

gia trng LI v FCS. LI=0 FISU; LI=1 hoc 2 LSSU;LI>2 MSU SIO: ch th dch v (octet)

FCS: dy kim tra khung

SIF: trng thng tin bo hiuGV:Nguy

n

ThThuH

ng

2008

Phn chuyn giao bn tin MTP MTP3: Cha cc chc nng mng bo hiu SNF gm iu

khin bn tin bo hiu v iu hnh mng bo hiu. iu khin bn tin bo hiu:

nh tuyn bn tin Phn bit bn tin Phn b bn tin

iu hnh mng bo hiu: Mc ch ca phn ny trong chc nng

mng bo hiu l thc hin cc hnh ng cn thit duy trdng bo hiu trong trng hp h thng c sai hng.

GV:Nguy

n

ThThu

Hng

2008

H thng bo hiu s 7

SCCP: L phn iu khin kt ni bo hiu athm vo thch ng vi UD theo c hai kiu:hng kt ni v phi kt ni.

UP(User part) : cc phn ca ngi s dng. Phnny to ra v phn tch cc thng tin bo hiu.Chng s dng MTP nhl chc nng truyn ti mang thng tin bo hiu ti cc phn s dng khccng loi. TUP: Phn ngi s dng in thoi DUP: Phn ngi s dng s liu MTUP: Phn ngi s dng in thoi di ng. ISUP: Phn ngi s dng mng ISDN

GV:Nguy

n

ThThu

Hng

2008

V d SS7 cho ISDN

SETUP

PBX TE PBXTLE

mng c quan

ser IAM IAM SETUP

OLE

CPCP

ALERTING

ALERTING

B.H knh D

ACM ACM

b o hiu theo bn tin b. hiu (lkdl bhiu)CONNECT

ANM ANM

CONNECTCONNECT ACK

CONNECT ACK

Trao i cc bn tin ISUP cung cp thm dv technology (b.h ngoi bng)

DISCONNECT REL REL DISCONNECT

DISCONNECT ACK

RLC RLC

DISCONNECT ACK


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19

GV:Nguy

n

ThThuH

ng

2008

Mng stch hp a dch v

(ISDN) Mng stch hp a dch v (ISDN)

Tin xy dng mng ISDN Cu hnh tham chiu Cc loi knh v giao tip trong ISDN

GV:Nguy

n

ThThuH

ng

2008

PSTN c nhiu nhc im truy cp Analog trn mch vng thu bao (cp ng)

khng linh hot trong vic s dng knh.

TBC ang pht trin theo hng s ho V chuyn giao s: hiu sut PSTN khng cao

Mt my fax nhm 3 (G3) chim mt knh 64 kb/s (thoi

s) nhng chtruyn c hnh nh vi tc 14,4 kb/s truyn d liu cn 16kb/s vn chim mt ng 64kb/s

Khi nim

GV:Nguy

n

ThThu

Hng

2008

Nhc im khc ca PSTN: C ly t TBC ti LE < 7km Nu ko di c ly m p dng cc mch in tkhuch i tn hiu th y l mt vn nan gii

v kinh t, k thut v s hn ch tc v chtlng

do vy phi tip tc s ho phn truy cpv mng mi ISDN ra i.

Khi nim

GV:Nguy

n

ThThu

Hng

2008

ISDN ISDN: ISDN theo

nh ngha ca ITU-Tl mt mng to ra

kt ni hon ton s t thit b u cuiny n TBC khc cung cp cc d chv thoi v phi thoiqua mt giao di nnc chu n ho quc t.

Tng i

Tng i Tng i

S

Telephone Chuynmch s

S S


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20

GV:Nguy

n

ThThuH

ng

2008

ISDN

GV:Nguy

n

ThThuH

ng

2008

CPE

TE2

TE2

TA

NT2 NT1

S

R

T

LEU

quc gia

Subscriber line

Cu hnh mng N-ISDN

GV:Nguy

n

ThThu

Hng

2008

Cu hnh mng ISDN

GV:Nguy

n

ThThu

Hng

2008

Cu hnh mng ISDN


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21

GV:Nguy

n

ThThuH

ng

2008

Knh trong ISDN

GV:Nguy

n

ThThuH

ng

2008

ISDN : PRI

7

6

5

4

3

2

1 1

7

6

5

4

3

2

1

TE1

NT1

LE

X l lp 1

M hnh tham chiu trnknh B

GV:Nguy

n

ThThu

Hng

2008

Bo hiu knh D - ISDN

Flag Address Control Information FCS Flag

01111110 01111110B1 16 bit, B2 16 bit, D 4 bitTng 36bit

B1 (8) D(1) B2 (8) D(1) B1 (8) D(1) B2 (8) D(1)

GV:Nguy

n

ThThu

Hng

2008

ISDN:

giao din trungtmmng


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22

GV:Nguy

n

ThThu

Hng

2008

Mng in thoi sdng Chuyn mch knh Chuyn khung Chuyn gi

Phn bit 2 khi nim Hng kt ni (connection oriented) Phi kt ni (connectionless)

n tp

GV:Nguy

n

ThThu

Hng

2008

V sao cn c bo hiu trong mng inthoi?

C nhng loi bo hiu no? Phn bit cc khi nim

Bo hiu thu bao, bo hiu lin i Bo hiu knh chung, bo hiu knh ring/knh

kt hp

n tp

GV:Nguy

n

ThThu

Hng

2008

Bo hiu s 7 c my mc (level)?

Bo hiu s 7 dng cho mng v dch v

no? V sao gi bo hiu s 7 l bo hiu knh

chung?

Bo hiu s 7 l knh hay gi?

So snh u im ca C7 so vi R2 vphn tch (v sao C7 li c u im ni

tri nhvy).

n tp

GV:Nguy

n

ThThu

Hng

2008

Ti liu tham kho

Telecommunications NetworkNTT- 1996

Uyless Black: ISDN& SS7 Architectures ForDigital Signaling Network.Prentice Hall, 1997


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Chng 3:

Cc mng chuyn gi

GV:Nguy

n

ThThu

Hng

2008

Cc cng ngh chuyn mch gi Cng ngh Frame Relay

Kin trc giao thc FR Khun dng khung Cc c im v ng dng ca FR

Cng nghATM Kin trc giao thc ATM Lp thch ng ATM Lp ATM Cc c im v ng dng ca ATM

Mng Internet M hnh OSI

Cc mng chuyn gi

GV:Nguy

n

ThThu

Hng

2008

Chuyn mch knh

Chuyn mch gi

GV:Nguy

n

ThThu

Hng

2008

Cng ngh Frame Relay Cng nghATM Cng ngh IP M hnh OSI

Cc cng ngh chuyn gi


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24

GV:Nguy

n

ThThu

Hng

2008

Kin trc giao thc FR (chuyn tip khung) Khun dng khung Cc c im v ng dng ca FR

Cng ngh FR

Mch o

FRADFRND

FRAD: Frame Relay Access Device

FRND: Frame Relay Network DeviceGV:Nguy

n

ThThu

Hng

2008

Kin trc giao thc FR Khuyn ngh I.233 v I.122 v phng thc khung, dch

v mang (bearer service) Chdng lp 1 v lp 2 c n gin ha

Lp 1 c bn l lp vt l Lp 2 chs dng tin trnh kim t r a li n gin m bo

d liu c li s b loi b. Cc lp cao hn thit b ca ngi s dng chu trch nhim

cho vic truyn li d liu li/hng.

Cng ngh FR

GV:Nguy

n

ThThu

Hng

2008

LCN: Logical Channel Number: S chknh logic DLCI: Data Link Connection Identifier (nhn dng kt

ni lin kt d liu)

DLCL=16

DLCL=20

F FCS D liu a ch, v.v.. F

Khun dng khung FR

F: Flag FCS: Frame Check Sequence

DLCI

DLCI

GV:Nguy

n

ThThu

Hng

2008

Cc c im v ng dng ca FR K thut kt ni c lin k t (connection oriented) di khung (gi) thay i Tc cao t 2-50Mb/s Khng cn truyn li trn tng chng (chcn mc

u cui-u cui) Yu cu cht lng truyn dn tt (cp si quang) Chuyn tip khung (FR) phn ln c s dng ni

cc mng cc b LAN.

Cng ngh FR


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GV:Nguy

n

ThThu

Hng

2008

Kin trc giao thc ATM Lp 1: Lp vt l Lp 2: Lp ATM Lp 3: Lp AAL

Lp thch ng ATM Lp ATM Cc c im v ng dng ca ATM

Cng nghATM

GV:Nguy

n

ThThu

Hng

2008

Cng nghATM

K n h1

K n h5

K n h1

C ellr n g

K n h1

K n h7

K n h1

K n h2

C ell

Ti Tiu

5 byte48 byte

GV:Nguy

n

ThThu

Hng

2008

Lp thch ng ATM cho php truyn ti cc dch v d liu v

dch v ng thi, thng tin phi c lmthch ng vi mng trong cc cch khc nhau.

ATM chia thnh 4 lp dch v (A, B, C, D)trn c s ca 3 tham s (ng b-tc bt-phng thc truyn ti).

Bn giao thc lp thch ng (AAL-1,2,3/4 v 5)c nh ngha cho mi loi

Cng nghATM

GV:Nguy

n

ThThu

Hng

2008

Cng nghATM

Lp thch ng ATM

Chuyn giaokhng lin kt

Chuyn giao c lin kt

Tc bt bin iTc btkhng i

Cc dch v khng ng bCc dch v ng b

AAL-3/4AAL-3/4

AAL-5

AAL-2AAL-1

Loi DLoi CLoi B(V d: Video)

Loi A(V d: thoi)

Tiu t bo

5 octet

Tiu t bo5 octet

AAL-1-5AAL-1-5

Cc trngthng tin cn li

44-47 octet

Cc trngthng tin cn li

44-47 octet


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GV:Nguy

n

ThThu

Hng

2008

Phn onv ghp nicc dch vbng rngkhc nhau

Cc dch vTc bit khng i Burst d liu Tc bit thay i

Phn on cc tboPhn on cc tbo

Ghp

GV:Nguy

n

ThThu

Hng

2008

Lp Vt l,lp ATM vlp AAL

Lp vt l

Lp ATM

Lp AAL

Dliu ngi sdng

ng gi dliu

Cc gi dliu c phn on (di 48 byte)

Cc t bo ATM(53 byte)

Cc t bo ATM trong khungSDH

GV:Nguy

n

ThThu

Hng

2008

Cc c im v ng dng ca ATM K thut theo kiu t bo vi di c nh S dng phng thc kt ni nh hng (connection-

oriented) cho truyn thng tin T bo ATM : gi c di c nh l 53 octet

5 byte tiu (header) 48 byte cn li dnh cho trng thng tin (d liu ngi s

dng)

Bng tn mm do Tc rt cao Ph hp vi mi dch v

Cng nghATM

GV:Nguy

n

ThThu

Hng

2008

B-ISDN (Broadband integrated services digitalnetwork): Mng s a dch v bng rng l khi nim phttrin hn so vi khi nim mng N-ISDN. Vo u thp k 80th k 20, ngi ta thy tng lai nhu cu cho cc dch v

cn nhiu bng thng hn so vi cc dch vc N-ISDNcung cp, ngha l bng thng cn vt qu 2 Mbit/s. Nu kt hp cc bng thng c nh cho vic iu khin dch

v vi nhng yu cu bng thng thay i th s khng hiuqu (v d l vic kt hp cc bng thng c nh 2Mbit/s v140Mbit/s).

ITU-T chn k/n ATM v kh nng linh hot trong tc bitca ATM lm k thut c s cho cc dch v B-ISDN.

Mng B-ISDN v ATM


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GV:Nguy

n

ThThu

Hng

2008

Cng ngh IP v Mng Internet

RARPARP

TCP

Data link

IP

UDP

DNS

Application

Transport

Network

Link

FTP TelnetSMTP NNTP

RIPIGMPICMP BGPOSPF

TFTPetc...

Media

(physical)

Ping RPCNFS BOOTP etc. ..

GV:Nguy

n

ThThu

Hng

2008

MngInternet

GV:Nguy

n

ThThu

Hng

2008

www: lu tr thng tin SNMP: Giao thc qun l mng n gin email: gi/son vn bn, gi km File transfer: chuyn, sao chp tp tin- FTP Remote Login: Ni mng/truy cp t xa H thng qun l tn min (DNS: Domain

Name System

Mng Internet: Cc dch v lp ngdng

GV:Nguy

n

ThThu

Hng

2008

7 ngng dngdng6 TrTrnhnh dindin

5 PhiPhinn4 GiaoGiao vvnn

3 MMngng

2 LiLinn ktkt DLDL

1 VVtt ll

M hnh OSI

V sao cn m hnh mngphn lp

Gim phc tp

Tiu chun ha giao din Thun tin module ha

m bo k thut lin mng

Tng nhanh spht trin(nhcu trc m)


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GV:Nguy

n

ThThu

Hng

2008

MM hhnhnh OSIOSI

ChChcc nnngng ccaa cccc llpp

7 ngng dngdng6 TrTrnhnh dindin

5 PhiPhinn

4 GiaoGiao vvnn

3 MMngng

2 LiLinn ktkt DLDL

1 VVtt ll

X l d liu ngi s dng

M t biu din d liu

Thng tin gia cc trm

Kt ni u cui-u cui

nh a ch v nh tuyn

Truy nhp phng tin

Truyn di dng cc bit nh phnGV:Nguy

n

ThThu

Hng

2008

ThThngng tintin gigiaa ccc trc trmm

segments/messages

packets

frames

bits

7

6

5

4

3

2

1

ngng dngdngTrTrnhnh dindin

PhiPhinn

GiaoGiao vvnn

MMngng

LiLinn ktkt DLDL

VVtt ll

HOST A HOST B

Application

Presentation

Session

Transport

Network

Data Link

Physical

GV:Nguy

n

ThThu

Hng

2008

ngng gigi ddliliuu

Application

Presentation

Session

Transport

Network

Data Link

Physical

Application

Presentation

Session

Transport

Network

Data Link

Physical

DataApplicationHeader

DataPresentationHeader

Data

Session

Header

DataTransportHeader

DataNetworkHeader

0101101010110001

DataFrameHeader

GV:Nguy

n

ThThu

Hng

2008

M hnh OSI

Chc nngcc lp

trong mhnh

End-user application process

Distributed information services

File transfer, access and management,document and message interchange, job

transfer and manipulationApplication layer

Syntax-independent messageinterchange service

Dialog and synchronization control forapplication entities

Presentation layerTransfer syntax negotiation, datarepresentation transformations

Session layer

Network-independent messageinterchange service

Mechanical and electrical networkinterface definitions

Data link control (framing, datatransparency, error control)

Network routing, addressing, call set-up,and clearing

End-to-End message transfer (connectionmanagement, error control, fragmentation,

flow control) Transport layer

Network layer

Link layer

Physical layer

Physical connection to networktermination equipment

Data communication network


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GV:Nguy

n

ThThu

Hng

2008

M hnh OSI v TCP/IP

Lp ng dng

Lp trnh din

Lp phin

Lp vn chuyn

Lp mng

Lp lin kt dliu

Lp vt l

Lp ng dng

Lp vn chuyn

Lp Internet

Lp giao din mng

M hnh OSI M hnh TCP/IP

GV:Nguy

n

ThThu

Hng

2008

V d v lin mng

LAN LAN

APPLAPPL

TCPTCP

IPIP

TokenringTokenring

APPLAPPL

TCPTCP

IPIP

EthernetEthernet

IPIP

TokenringTokenring

X.25F.RATM

X.25F.RATM

IPIP

X.25F.RATM

X.25F.RATM

Ethe-rnetEthe-rnet

Mng ngtrc din rngng thu

ring Kt cu h tng da trnni kt c lin kt

nh tuyn nh tuyn

Ngi s dngNgi s dng

Cc gi IP

khng lin kt

B nh tuyn v/hoc chuynmch ph thuc voch truyn titch cc

GV:Nguy

n

ThThu

Hng

2008

Understanding TelecommunicationsW. Richard Steven. Published by Addison Wesley Longman, Inc, 1994

Telecommunications NetworkNTT- 1996

Internetworking vi TCP/IPNguyn Quc Cng. Nh xut bn gio d c, 2001

TCP/IP Protocol SuiteBehrouz A.Forouzan with Sophia Chung Fegan, 2000

http://www.iec.org/online/tutorials/

Ti liu tham kho


30/59

1

1

Mng vin thngChng 4: Mng IP

GV: Nguyn Th Thu HngBMMVT-Khoa vin thng 1- [email protected]

2008

6

Mng my tnh

10.0.0.2 10.0.0.3

16.0.0.3 16.0.0.5

12.0.0.5

10.0.0.1

Mng 1012.0.0.3 12.0.0.4

12.0.0.7

16.0.0.2

Mng 12

Mng 16

Host

Router

8

Mng IP

L thuyt B giao thc TCP/IP Lp ng dng Lp vn chuyn

Giao thc UDP Giao thc TCP

Lp lin mng Giao thc IP Cu trc gi tin IP

QoS trong mng IP

Minh ha hot ng ca mng IP

9

M hnh OSI v TCP/IP

Lp ng dng

Lp trnh din

Lp phin

Lp vn chuyn

Lp mng

Lp lin kt dliu

Lp vt l

Lp ng dng

Lp vn chuyn

Lp Internet

Lp giao din mng

M hnh OSI M hnh TCP/IP


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10

B giao thc TCP/IP

TCP/IP c pht trin trc m hnh OSI cctng trong TCP/IP khng tng ng hon tonvi cc tng trong m hnh OSI

B giao thc TCP/IP c chia thnh bnlp/tng: Lp 4- Application layer (lp ng dng)

Lp 3- Transport layer (lp vn chuyn) Lp 2- Internet Layer (lp Internet i khi c gi

l lp lin mng) Lp 1- Network Access Layer/ Network Interface and

Hardware (lp truy nhp mng, i khi c gi l lpgiao din mng) 11

Cng ngh IP v Mng Internet

RARPARP

TCP

Data link

IP

UDP

DNS

Application

Transport

Network

Link

FTP TelnetSMTP NNTP

RIPIGMPICMP BGPOSPF

TFTPetc...

Media

(physical)

Ping RPCNFS BOOTP etc...

12

Hot ng c bn ca chng giao thc

EthernetDriver

Interface

implementation

InterfaceTCP

Port 25

EthernetDriver

SMTP SMTPFTP FTP

IP IP

TCP TCP

TCP

Port 25

TCP

Port 21

TCP

Port 21

13

Lp ny cung cp cc dch v di dng cc giaothc cho ng dng ca ngi dng. Mt s ngdng thng gp: FTP: y l mt dch v hng kt ni v tin cy, s dng TCP

cung cp truyn tp gia cc h thng h tr FTP. HTTP: Trao i cc ti liu siu vn bn h tr WEB. SMTP: Truyn th in t gia cc my tnh. www: lu tr thng tin email: gi/son vn bn, gi km SNMP: Giao thc qun l mng n gin. Telnet: Cho php cc phin ng nhp t xa gia cc my tnh. H thng qun l tn min (DNS: Domain Name System

Lp ng dng


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14

Dch v tn min DNS(domain name)

Dng thay a ch IP nh x gia a ch IP v tn min:

Tp host hoc DNS Cu to: ptit.edu.vn

ptit: Tn my ch edu: Tn min mc hai (Do t chc qun l mng quc gia quy nh) vn: Tn min mc cao nht (M quc gia; com; edu; net;int; org; mil; gov)

ROOT

COM EDU ORG NETVN

EDU COM EDU

INFOR

VNN

PTIT

15

World Wide Web

Dch v rt ph bin Biu din thng tin di dng siu vn bn Hot ng theo m hnh client/server

Internet

Trnh duytWeb

My chWeb

My chWeb

My chWeb

TrangWeb

16

Trnh duyt WEB

17

Th in t(Email)

Dch v ph bin nht

Nguyn tc lu v chuyn tip

Ngi dng cn c ti khon (account) th

Gi, nhn th: Outlook Express; Eudora

Thin t trn Web: yahoo.com; hotmail.com

Ngi gi

Internet

Ngi nhn


33/59

4

18

Truyn tp

Cho php truyn tp (FTP)

Ngi dng cn ti khon FTP

Ngi dng

My ch tp

Tpftp tn min

hoc a ch IP

Internet

19

Lp vn chuyn (Transport layer)

Lp vn chuyn chu trch nhim chuynpht ton b thng bo ttin trnh ntin trnh (process-to-process).

Hai giao thc lp ny: TCP v UDP, migiao thc cung cp mt loi dch v giaovn: Hng kt ni Phi kt ni

20


Giao thc UDP (User Datagram Protocol) UDP l mt giao thc truyn thng phi kt

ni v khng tin cy. UDP c trch nhim truyn cc thng bo t

tin trnh n tin trnh, nhng khng cungcp cc c chgim st v qun l.

UDP cng cung cp c chgn v qun lcc scng nh danh duy nht cho cc ngdng chy trn mt trm ca mng

21

Giao thc UDP

y chc nng iu khin lung v nghn ln lp ngdng

Khng c kh nng p ng nghn, nu gp nghn cth s gy sp mng (t mng)

Do t chc nng phc tp nn UDP thng c dngcho cc ng dng khng i hi tin cy cao tronggiao vn.

Source Port Destination Port

UDP Header

Segment length Checksum

8o

ctet

0 4 10 16 31


34/59

5

22


Giao thc TCP: Nhim v ca TCP Sp xp, m bo rng cc gi n ng thtpha thu Kim tra v sa li phn d liu ca ngi sdng iu khin lung gia cc my ch Phn on

23


TCP c bn: Sau khi nhn c mt gi s gi tr vACK

gim bt s lng ACK (trnh lng ph bng thng ci bin giao thc sau khi nhn c mt slng gi nht nh, TCP s gi xc nhn.V d: nu chng ta pha nhn v s lng gi cquy nh l 3 th chng ta gi xc nhn cho pha gisau khi nhn c 3 gi.

u im ca vic lm ny l TCP c th iu chnh vicgi v nhn cc gi tin.V d: Hai ngi c ththo thun vi nhau v mtphin truyn thng. Ngi gi s bt u gi 4 gi, sau 8 gi, sau 16 gi v cnhvy cho ti khi nhnc xc nhn pha ngi nhn rng mt sgi bmt.

24

Lp vn chuyn


Sequence Number

Acknowledgement Number

TCP datagram

HeaderLength

unusedFlags Window

Checksum Urgent Pointer

Option Padding


UDP Header

Segment length Checksum

20

octet

8octet

0 4 10 16 31

Data (if any)

Data (if any)

Cu trc gi/datagram TCP v UDP

25

So snh ng dng 2 giao thc lpvn chuyn trong m hnh TCP/IP

phc tp cagiao thc

iu khin lungv nghn

Tr

Tin cy

UDPTCPc tnh


35/59

6

26

Lp lin mng - Cu trc gi tin IPv4

source IP address

destination IP address

version hdr len type of service

identification fragment offset

time-to-live protocol header checksum

- -options (if any)

- -data (if any)

324 3 134 8

total length (bytes)

flags

La chn: tr ti thiu,thng lng ti a,tin cy ti a,ti thiu gi thnh..

Phin bn= 4

Thi giansng

di ti a headertnh theo t 32 bt

Ch gm phnheader

C nh duphn mnh

Khong ccht datagram

u tin

V d: nhtuyn c

bit..

Id cadatagram ban

u

Tng di(tnh theo

byte)

a ch IPngun

a ch IPch

27

Lp lin mng - a ch IPv4

Cha s dng (28 bt)1111Lp E

a ch multicast (28 bt)0111LpD

a ch trm(8 bt)

a ch mng011Lp C

a ch trm (16 bt)a ch mng01Lp B

a ch trm (24 bt)a ch mng0Lp A0 1 2 3 4 7 15 23 31

28

V d v nh tuyn

Mng10.0.0.0

Mng20.0.0.

Mng30.0.0.

Mng40.0.0.0

Q R S

10.0.0.5

20.0.0.5

20.0.0.6

30.0.0.6

30.0.0.7

40.0.0.7

30.0.0.740.0.0.0

20.0.0.510.0.0.0

Truyn trc tip30.0.0.0

Truyn trc tip20.0.0.0

nh tuyn ti a ch nyTi cc hosts trn mng

Bng nh tuyn ti R

29

Cc tham s QoS trong mng IP

Bng thng (bandwidth) Tr (delay)

Bin ng tr (jitter) T l mt gi (packet loss) kh dng ca mng (availability) bo mt (security)


36/59

7

30

Nng lctruyn lan

Kh nngtruyn dn

Cht lng dch v(QoS)

Cht lng dch v

Kh nngtnh cc

kh dng

Mc tin cy

Kh nngbo dng

H trbo dng

Kh nng h

tr dch v

Kh nng khai

thc dch v

Mc an

ton dch v

Kh nng truy

nhp dch v

Kh nng duy

tr dch v

Mc hon

ho dch v

Kh nng phc v

Lp k hoch

Cung cp

Qun l

Ti nguyn vs thun tin

Kh nng x llu lng

Cht lng mng (NP)

tin cy

quangia QoS v NP

31

QoS trong mng IP

Nhng yu t nh hng n cht lngtrong mng IP

Tr truynlan

Tr truynlan

Xl v hngi

Xl v hngi

Truynlan

Truynlan

Xl vhng iXl vhng i

Truynlan

Truynlan

Truynlan

Truynlan

ng/m gi

M/nggi

Xl vhng iXl vhng i

32

Bng thng

L tc truyn thng tin cho mt phin truynthng (mt ng dng trn nn IP)/hoc l rng bng thng ca mt lin k t trong mng IP 64 kbit/giy, 384kb/s,

2 Mbit/giy, 100 Mb/s,

Bng thng thng tin ph thuc vo ngun githng tin v bng thng kh dng ca cctuyn ng.

33

Bng thng

Bi tp: La chn ng i vi 1 lung 5Mb/s vo nt 1 ra nt 4 n nt 6 2 lung 5Mb/s vo nt 1 ra nt 6 1 lung 7mb/s, 1 lung 5Mb/s vo nt 1 ra nt 6

1

2 3

4 5

6

5Mb/s

10Mb/s

10Mb/s

10Mb/s

5Mb/s 5Mb/s

5Mb/s

10Mb/s

5Mb/s


37/59

8

34

Tr

Tr l thi gian truyn trung bnh ca dch v t imvo n im ra khi mng. C nhiu dch v - c bitl cc dch v thi gian thc nhtruyn thng thoi- bnh hng rt ln bi tr qu ln v khng cn thit

Truyn thng tng tc s tr thnh kh khn khi trvt qu ngng 150 ms v khi tr vt qu 200 ms,ngi sdng s thy sngt qung v nh gi chtlng thoi mc thp. cp c thoi cht lng

cao, mng VoIP phi c kh nng m bo tr nh.Khuyn ngh ITU-T G.114 gii hn thi gian tr vng tia chp nhn c l 300 ms gia hai gateway VoIP(tr mi chiu l 150ms)

35

Tr trong m ha VoIP

20ms5ms30ms5,3 Kb/sMP-ACELP,

G.723.1

20ms5ms30ms6,3 Kb/sMP-MLQ,

G.723.1

10ms2,5ms10ms8 Kb/sCS-ACELP,

G.729A

10ms2,5ms10ms32 Kb/sADPCM,

G.726

Tr ca bm ha

trong

trnghp ti

nht

Tr ca bm ha

trong

trnghp tt

nht

Khi muyu cu

Tc B m ha

36 38

Thnh phn gy tr trong mng

Tr x l Tr hng i Tr lan truyn

Tr truyn lan(P1)

Tr truyn lan(P1)

Tr xl v hngi (Q1)

Tr xl v hngi (Q1)

Tr truyn lan(P2)

Tr truyn lan(P2)

Tr xl v hngi (Q2)

Tr xl v hngi (Q2)

Tr truyn lan(P3)

Tr truyn lan(P3)

Tr xl v hngi (Q3)

Tr xl v hngi (Q3)

Tr truyn lan(P4)

Tr truyn lan(P4)

Trng/m gi

Tr m/nggi


38/59

9

39

Tr (delay)

Bi tp v tnh trVoIP S lng nt trung gian: 5 M ha G.723.1

Tr x l trung bnh 2ms Tr hng i trung bnh 2ms Khong cch: 1000Km

Tr truyn lan(P1)

Tr truyn lan(P1)

Tr xl v hngi (Q1)

Tr xl v hngi (Q1)

Tr truyn lan(P2)

Tr truyn lan(P2)

Tr xl v hngi (Q2)

Tr xl v hngi (Q2)

Tr truyn lan(P3)

Tr truyn lan(P3)

Tr xl v hngi (Q3)

Tr xl v hngi (Q3)

Tr truyn lan(P4)

Tr truyn lan(P4)

Trng/m gi

Tr m/nggi

40

Bin ng tr

Bin ng tr l skhc bit v tr ca cc gi khc nhaucng trong mt dng lu lng

Bin ng tr c tn scao c gi l jitter trong khi binng tr c tn sthp c gi l wander

Jitter ch yu do ssai khc v thi gian xp hng ca ccgi lin tip trong mt lung gy ra v l vn quan trngnht ca QoS

Jitter qu nhiu c th c xl bng b m, song n lilm tng tr nn li ny sinh cc kh khn khc. Vi cc ccu loi b thng minh, cc h thng IP Telephony/VoIP sc ng b lung thng tin bng cch loi b gi theo kiuchn la, nhm trnh hin tng walkie-talkie gy ra khihai pha hi thoi c tr ng k

42

Tn tht gi

Tn tht, hoc l bit hoc l gi, c nh hngln vi dch v IP Trong khi truyn thoi, vic mt nhiu bit hoc gi

ca dng tin c th to ra hin tng nhy (pop)thoi gy kh chu cho ngi s dng

Trong truyn d liu, vic mt mt bit hay nhiugi c th to gy hin tng khng u trn mnhnh nht thi song hnh nh (video) s nhanhchng c x l nhtrc

Tuy nhin, nu vic mt gi xy ra theo dy chuyn,th cht lng ca ton b vic truyn dn sxung cp

43

L t phn thi gian mng hot ng trn tng thi gian. Giihn thng thng cho mng thoi l 99,999% (nm conchn) hoc l khong 5,25 pht khng hot ng trong 1nm. kh dng t c thng qua skt hp ca tincy thit b vi kh nng sng ca mng. kh dng lmt tnh ton xc sut khng ch tnh n ginbng cc tng hpcc con s

kh dng

A

B C

D

E F

85%

90%

70%

70%

75% 75%

95%


39/59

10

44

kh dng

5,25 pht99,999%

26,28 pht99,995%

52,56 pht99,99%

4,38 gi99,95%

8,76 gi99,9%

1,825 ngy99,5%

3,65 ngy99%

Tng thi gian ngng hotng trong mt nm

Tnh sn sng camng

45

bo mt

bo mt (security) lin quan ti tnh ringt, stin cy v xc nhn khch v ch.

Cc vn lin quan n bo mt thng cgn vi mt vi hnh thc ca phng php mtm (m ha v gii m) ca c pha mng vthit b u cui pha ngi sdng.

C ththc hin mt phn bo mt qua

firewall, xc nhn ID v password, nhn thc

46

Cc phng php ci thin QoStrong mng IP

Do c im ca loi hnh dch v lu lngthoi IP cn c h tr cc bin php tngcng mc QoS m bo vic tha mncho cc yu cu tpha ngi sdng. C

nhiu phng php h tr cht lng dch vtrong mng IP Hu ht cc m ngc tri n khai v i vi m c

QoS lp 3, htrcc loi dch vsau: Xc tin hng i cho cc khung iu khin m bo hng i cho lu lng VoIP N lc ti a cho tt c cc lu lng dliu khc

47

Cc phng php ci thin QoStrong mng IP (cont.)

Cc bin php tphangi sdng tng cng thng

minh ca cc thit b ucui

sdng dch v vonhng thi im hp l

Tr truyn lan(P1)

Tr truyn lan(P1)

Tr xl v hngi (Q1)

Tr xl v hngi (Q1)

Tr truyn lan(P2)

Tr truyn lan(P2)

Tr xl v hngi (Q2)

Tr xl v hngi (Q2)

Tr truyn lan(P3)

Tr truyn lan(P3)

Tr xl v hngi (Q3)

Tr xl v hngi (Q3)

Tr truyn lan(P4)

Tr truyn lan(P4)

Trng/m gi

Tr m/nggi

Cc bin php tpha mng Tc truy nhp cam kt Xp hng trn c s lp Lp dch v Cc dch v phn bit Quyn u tin IP Chuyn mch nhn a giao thc


40/59

11

48

c

Mng Core

Phn lpcc dch v

Lp chnh schcho lu lng

nh dugi tin

Sp xphng i

Kim sot bngn lu lng

Router1 Router2

5


49


Cc bin php tpha mng (cont.) Xp hng theo VC nh tuyn theo chnh sch Cc hng QoS

Loi b sm ngu nhin Giao thc dtrti nguyn Kiu dch v nh hnh lu lng Xp hng hp l theo trng s

50

Kin trc hng i trong router

Hng i

Hng i

Hng i

Phn loi gitin da trntrng TOS,DS, TC trong

header

X l gi tin davo cc k thutqun l Queue

.

.

.

n

1

51

Mt s cch thc x l hng i

1.Hngi FIFO

Cc gi

n trcc x ltrc


41/59

12

52

2.Hngi PQ

High

Medium

Normal

low

Phn

loi

Phn

loi githeo u tin

Lp lchtheo u tinca gi

53

1. Lp truyn ti nmu trong b giao thcTCP/IP (suite)?

Lp vt l

Lp mng

Lp vn chuyn

Lpng dng

2. TCP/UDP nm trong l p no trong m hnh

phn lp TCP/IP Lp vt l

Lp mng

Lp vn chuyn

Lpng dng

Cu hi tho lun

54

3.1. uim ca UDP so vi TCP l Tin cy hn C kh nngiu khi n lung n gin hn

3.2. uim ca TCP so vi UDP l n gin hn Nhanh hn Tin cy hn

Cu hi tho lun

55

4. Tiu gi IPv4 c kch thc la) 8 byte b) 20 byte

c) 64 byte d) C th thayi 5. Tiu UDP c kch thc l

a) 8 byte b) 20 bytec) 64 byte d) C th thayi

6. Tiu UDP c kch thc la) 8 byte b) 20 byte

c) 64 byte d) C th thayi 7. M hnh TCP/IP thng c my lp?

a) 3 lp b) 4 l pc) 5 lp d) 7 l p

nh gi


42/59

13

56

8.1a ch203.164.0.11 la cha) L p A b) Lp Bc) L p C d) Multicast

8.2. a ch10.12.0.11 la cha) L p A b) Lp Bc) L p C d) Multicast

8.3. a ch224.164.0.11 la cha) L p A b) Lp B

c) L p C d) Multicast 8.4. a ch162.164.0.11 la ch

a) L p A b) Lp Bc) L p C d) Multicast

nh gi

57

9.1 Nu gim kch thc ca s TCPi mt na, gisRTT l c nh th b ng thngtc cho d chvsdng TCP s: Ginguyn nhc Tng gpi Gim mt na

9.2 Nu tng RTT ln gpi, gi skch thc cas TCP l c nh th b ng thngtc cho d ch

vsdng TCP s: Ginguyn nhc Tng gpi Gim mt na

Cu hi tho lun

58

10.1 Giao thc no n m trong lp vn chuyn trongm hnh TCP/IP? TCP, UDP

FTP, UDP

UDP, SMTP

SMTP, DNS

10.2 Giao thc no n m trong lpng dng trongm hnh TCP/IP: FTP, UDP

TCP, UDP

SMTP, DNS

UDP, SMTP

Cu hi tho lun

59

Internetworking vi TCP/IPNguyn Quc Cng. Nh xut bn gio d c, 2001.

TCP/IP Protocol SuiteBehrouz A.Forouzan with Sophia Chung Fegan, 2000.

Mng my tnh v cc h thng mNguyn Thc Hi. NXB Gio Dc, 1997.

TCP/IP cn bnNguyn Xun Khnh. HVCNBCVT-TTTBCVT2, 11/2004.

Tham kho thmhttp://www.vnic.net.vn/tainguyen/domainname.htm

Ti liu tham kho


43/59

3Nguy

nThThuHng2008

Chng 4: Mng IP

Gii thiu chung v VoIP

Thng 2 nm 1995 hng Vocaltec thc hintruyn thoi qua Internet, lc kt ni chgm mt PC c nhn vi cc trang thit bngoi vi thng thng nh card m thanh,headphone, mic, telephone line, speaker,modem phn mm ny thc hin nn tnhiu thoi v chuyn i thng tin thnh ccgi tin IP truyn dn qua mi trngInternet.

C rt nhiu chun cho truyn thoi trn nnIP nhng c hai chun c s dng rng rinht l H.323 ca ITU v SIP ca IETF

4Nguy

nThThuHng2008

Mng VoIP

u nhc im Gim cc ph dch v thoi ng di Nhiu cuc gi hn, gim rng bng

thng cho mi kt ni H tr thm nhiu dch v b sung khc

v gip trin khai cc dch v mi nhanhchng, d dng, t ng dch v, phthin trng thi, qun l thng tin, m hobo mt..

S dng c hiu qu nht giao thc IP:Tn dng u t, thit b sn c vi nhiu hnh mng v cung cp dch v

5Nguy

nThThuHng2008

Mng VoIP: Cc gii php m ha

ting ni

M ho dng sng; M ho ngun; M ho lai

2,525,6kb/s16(20ms)

0,7783,5kb/s4(5ms)5,36,3

G.723.1A-CELPMP-MLP

2,3227,6kb/s20(20ms)

0,7486,4kb/s5(5ms)8

G.729(CS-ACELP)

1835,6kb/s40(20ms)

0,6894,4kb/s10(5ms)16

G.728(LD-CELP)

1,2451,6kb/s80(20ms)

0,58110,4kb/s20(5ms)40/32/24G.726/G.727

0,7783,6kb/s160(20ms)

0,45142,4kb/s40(5ms)64(no compression)

G.711(PCM)

Compression gain(relative toPCM/STM)

Bandwidth(including overheads)

Packet size(bytes)

Peak rate (kb/s)Codec

6Nguy

nThThuHng2008

Mng VoIP: Cc giao thc v bo hiu

Chun H.323 cung cp nn tng cho vic truyn thngthoi, video v d liu qua cc mng da trn IP, baogm c Internet. H.323 l khuyn ngh ca ITU nia ra cc chun truyn thng a phng tin trn ccmng LANs, cc mng ny khng m bo cht lngdch v (QoS).

SIP (Session Initiation Protocol) l mt giao thc iukhin tng ng dng c th thit lp, duy tr v giiphng cc cuc gi hoc cc phin truyn thng. Ccphin truyn thng c th l in thoi hi ngh, hc txa, in thoi Internet v cc ng dng tng t khc.


44/59

7Nguy

nThThuHn

g2008

Mng VoIP: H.323

8Nguy

nThThuHn

g2008 Ngn xp

giao thcVoIP-H.323

9Nguy

nThThuHng2008

Mng VoIP-H.323

Audio

In/Out

MAudio Chuyn ti Chuyn i

IP

iu khin

h thng

Mng IP

(Internet)

Chc n ng ca H.323

10Nguy

nThThuHng2008

Mng VoIP-H.323


45/59

11Nguy

nThThuHn

g2008

Mng VoIP - SIP

SIP l mt giao thc chun do IETF a ranhm mc ch thc hin mt h thng c khnng truyn qua mi trng mng IP.

SIP da trn tng ca SMTP v HTTP. Nc nh ngha nhmt client-server trong cc yu cu c bn gi (bn client) a rav bn b gi (server) tr li nhm p ngyu cu ca bn gi.

SIP s dng mt s kiu bn tin v trngmo u ging HTTP, xc nh ni dung thngtin theo mo u c th ging nh giao thcc s dng trn Web.

Assigned RFC 2543 vo thng 3/1999

12Nguy

nThThuHn

g2008

Mng VoIP - SIP

SIP h tr 5 dch v trong vic thit lp v k tthc cc phin truyn thng: nh v ngi dng: Xc nh v tr ca ngi

dng tin hnh hi thoi. Nng lc ngi dng: Xc nh cc phng

thc (phng tin) v cc tham s tngng trong hi thoi.

Xc nh nhng ngi sn sng tham gia hithoi.

Thit lp cc tham s cn thit cho cuc gi. iu khin cuc gi: Bao gm c qu trnh

truyn v k t thc cuc gi.

13Nguy

nThThuHng2008

Mng VoIP - SIP

Proxy

Server

SIP Terminal(SIP phones)

SIP Servers SIP Gateways

User AgentProxy

Server

Gateway

VoIP (H.323)

ISDN

PSTN

LocationServer

RedirectServer

RegistralServer

14Nguy

nThThuHng2008

Mng VoIP SIPM hnh tham chiu

Other

services

eg.

PINT

initialISDN

phonecall

Data

services

eg. using

RTSP

TCP

IP

UDP

SIP-extensions SIPheader

Methods Message body:SDP, PINT

Audio

RTP

Video

Application and System control

Call

transfer

C

allhold

...

ntance

mes

sageand

r

esence

...

AV I/Oequipment


46/59

15Nguy

nThThuHn

g2008

Mng VoIP - SIP

V c bn cc bn tin SIP c chia lm hailoi:

bn tin yu cu (Request)

bn tin p ng (Respond) C hai loi bn tin ny u s dng chung mtnh dng c bn c quy nh trong RFC

2822 vi cu trc gm mt dng khi u(start-line), mt s trng tiu v mt phnthn bn tin tu chn.

16Nguy

nThThuHn

g2008

Mng VoIP - SIP

Cu trc ny c tm tt nhsau:generic-message = start-line*message-headerCRLF[ message-body ]

Vi start-line = Request-Line / Status-Line Message-header = (general-header/Request-

header/Respone-header/entity-header) Trong , dng khi u, cc dng tiu hay dng

trng phi c kt thc bng mt k t dng trng,xung dng (CRLF) v phi lu rng dng trng vnphi c ngn cch phn tiu v thn ca bn tinngay c khi phn thn bn tin l rng.

17Nguy

nThThuHng2008

SIP- C chhot ng

Media Path

CallSetup

Call

Teardown

User Agent Location/Redirect Server

302: Moved Temporarily

Proxy Server

INVITE

Proxy Server User Age

INVITE

302

ACK

INVITE

INVITE

302

ACK

INVITE180 (Ringing)

200 (OK) 200 (OK) 200 (OK)

180 (Ringing)180 (Ringing)

RTP Media Path

200 (OK) 200 (OK) 200 (OK)

BYE BYE BYE

19Nguy

nThThuHng2008

4.5.3Cc loi hnh dch v thoi qua IP

Phone to Phone (my t ti my t quamng trung gian IP) PC to Phone (my tnh ti my t)

PC to PC (my tnh ti my tnh: c thkt ni trc tip qua mng IP hoc cthgin tip qua mng khc)


47/59

20Nguy

nThThuHn

g2008

Phone to Phone (P2P)

PSTN PSTNIP network

Gateway Gateway

PSTN

21Nguy

nThThuHn

g2008

PC to Phone

PSTNIP networkPC

Gateway

IP phone

22Nguy

nThThuHng2008

PC to PC

IP network 3G phone

3G phone

IP phone IP phone

23Nguy

nThThuHng2008

4.5.3Cc loi hnh dch v thoi qua IP

Trin khai cc dch vVoIP ca VNPT Gi 171 (Phone 2 Phone, cc dch v ca doanh

nghip khc nh178-Viettel, 177-Sfone, 179-EVN) Gi 1717: th tr trc cho cuc gi ng di

trong nc v quc t Gi 1719: th tr trc cho cuc gi ng di

trong nc v quc t, c thgn ti khon cnh vo thu bao

Fone VNN: PC2PC v PC2Phone


48/59

24

Chng 5:Xu hng pht trin mngvin thng v dch vTrends in Telecommunications Networks and

Services Development

Nguyn Th Thu HngBMMVT-PTIT

25Nguy

nThThuHn

g2008

Ni dung chnh

Shi t cac c mn gvdch vvin thng

Mng th h sau NGN Cng ngh mng ring o (VPN) Cc cng ngh mng khng dy v

di ng

27Nguy

nThThuHng2008

Dn s: 85 triu (2007)> 70% dn s ngoi thnhS thu bao in thoi : >40 tr.S ngi sdng Internet > 16 tr.~1,2 triu thu bao ADSL (12/2007)

Vin thng Vit Nam

Vit Nam, giai on hin nay l giaion chuyn dch gia cng ngh th h c(chuyn mch knh) dn cng ngh thh mi (chuyn mch gi) din ra trong h tng csthng tin trong cc cng ty khai thc dch v trong cch tip cn ca cc nh khai

thc mi khi cung cp dch v chokhch hng

30Nguy

nThThuHng2008

S ngi s dng Internet Vit Nam

Theo s thu bao quy i


49/59

31Nguy

nThThuHn

g2008

S ngi s dng Internet Vit Nam

Theo s ngi sdng

33Nguy

nThThuHn

g2008

Xu hng pht trin CNTT vin thng trn th

gii v nh hng i vi cu trc mng vin thng

Xu hng pht trin cng ngh in t - tinhc-vin thng Cng ngh in tvi x u hng pht trin hng

ti stch hp ngy cng cao ca cc vi mch

Spht trin ca k thut s

Skt hp gia truyn thng v tin hc, cc phnmm hot ng ngy cng hiu qu

Cng ngh quang lm tng kh nng tc v

cht lng truyn tin, chi ph thp ...

34Nguy

nThThuHng2008

Cc xu hng pht trin trongcng ngh mng [ITU TSB]

CO = Hot ng kt ni nh hngCL = Hot ng khng kt ni

= Song hng

Cnh tranh viCO

IPCL

CO

ATM

PSTN/ISDN

Mi trng vin thng

QoS khng c mbo

QoS c m bo QoS cao

35Nguy

nThThuHng2008

Xu hng pht trin cng ngh vin thng:

Cng ngh truyn dn: Cng ngh quangquang ha

Cng ngh chuyn mch: tch hp vi mch, k

thut s, ATM: kt hp knh+gi, a dch v,a tc , chuyn mch quang

Cng ngh truy nhp: Kt hp truyn thng vtin hc: c cc kiu truy nhp nh quang, cpng (ADSL, HDSL ), v tuyn


50/59


51/59

41Nguy

nThThuHn

g2008

Mt s dch v chnh trong mng NGN

Dch v thoi Dch vdliu

Dch v aphng tin

Mngring o

Tnh tonmng cng

cng

Dch vchuyn cuc

gi

Tr chitng tc

Thc t ophn tn

Qun lti nh

Bn tinhp nht

Mi giithng tin

Thng miin t

42Nguy

nThThuHn

g2008

5.2 Mng th h sau NGN

ng lc pht trin Cu trc v c im Mng NGN ca Vit Nam

43Nguy

nThThuHng2008

5.2 Mng th h sau NGN

Khi nim: Mng vin thng thhsau l mt mng c htng thng tin duy nht da trn cng ngh gic thtrin khai nhanh chng cc loi hnh dch v khc nhauda trn shi t gia thoi v sliu, gia c nh v di

ng Mng NGN c th c m t l mng thc hin ddng ba

vn sau: Truy nhp c lp ti ni dung (content) v ng dng

kh dng cao, mng li v mng truy nhp c bng thng ln, htr a dch v

L mt bng cho php pht trin v trin khai nhanh chng cc ngdng tch hp vo ngi sdngu cui

44Nguy

nThThuHng2008

5.2 Mng th h sau NGNc im mng NGN

Xy dng trn nn tng h thng m

Cc dch v c lp vi mng

Mng NGN l mng chuyn mch gi

Mng NGN c dung lng ngy cngtng


52/59

45Nguy

nThThuHng2008

Cu trc phn lp mng NGN

(phn lp chc nng)

Lp

qun

l

Lp truyn thng

Lp truy nhp v truyn dn

Lp ng dng

Lp iu khin

46Nguy

nThThuHng2008

Cu trc vt l mng NGN

49Nguy

nThThuHng2008

Cc tchc quc tvi vic xy dng mhnh cu trc mng thhsau NGN

Mng th h sau l vn thu ht s quan tm ca nhiu t chc vinthng, in hnh l hot ng ca cc t chc vin thng sau y :

ITU-T cc nhm SG16, SG11, SG13, SG2, SG8

IETF vi cc nhm PINT WG, MMUSIC WG, IPTEL, SIGTRAN WG

MSF ( Multiservice Switching Forum Din n chuyn mch a dchv)

ETSI vi d n TIPHONE (Telecom & Internet ProtocolHarmonization over Network Giao thc vin thng v Internet trnmng)

ATM Forum (Din n ATM)

ISC (International Softwitch Consortium T chc quc t nghin cuv chuyn mch mm)

TINA (Telecom. Information Networking Architecture Consortium Hip hi nghin cu cu trc mng thng tin vin thng)

AMF (Asian Multimedia Forum - Din n chu v a phng tin)

S56N

guy

nThThuHng2008

Mt sm hnh cu trc mng NGN v gii php

mng ca mt snh cung cp dch v vin thng

M HNH NGN CA ALCATEL :

Alcatel a ra m hnh mng th h sau vi c c lp :

Ccdch vmng

c lpThit b mngc

Lp iu khin

Lp dch v mng

Lp truy nhp v truyn ti

Dch v/b o hiumng c

Truy nhp txa

Lp trung gian

Khch hngNgi s dng


53/59

57Nguy

nThThuHng2008

Cc thnh phnca mng th h

sau (M hnhca Alcatel)

AGW : Cngtruy nhp,CSW : Chuyn mch chnh,LAD : Thitb truynhp tchhp,MGC : B iukhin cng

thitb,

MSW : Chuynmch thit b,NGDLC/DSLAM :

RC : B iukhinnhtuyn

SEN : Nt thc hindchv,SGW : Cng bohiu,TGW : Cng trungk,WGW: Cngv tuyn.

Ccdch vmng

clp

DCS

Lptruy nhp/truynti

ADM

SS7, ISDN, B-ISDN,

RADIUS,

Thit b mngthak

To/qun l/mng/dch v

MGC

Lpiu khin

RCSGW

Lpdchv

mngSEN

Dchv/bo hiumng tha k

Khch hng

IAD

NGDLC/

DSLAM

ADSL

ADSL/TR-057

IP/ATM GR-303/

TR-008

IP/

ATM

Mng truynhp

Truynhp vtuyn3G

Truy nhpv tuyn

IS41/GR-303

Truynhp tchhp

PPP/ATM/FR

Trungk TDM

SNMP,CMIP,

TGW

DGWMSW

AGW CSW

WGWLp

thit b

IP, SS7, MSF,MGCP

58Nguy

nThThuHng2008

M hnh mng NGN ca Siemens

Gii php mng NGN ca Siemens da trn cutrc phn t n, xo i khong cch gia mng PSTNv mng s liu. Cc h thng a ra vn da trncu trc pht trin ca h thng chuyn mch mni ting ca Siemens l EWSD

Siemens gii thiu gii php mng th h mi c tnSURPASS

59Nguy

nThThuHng2008

Cu trc mng th h sau (m hnh ca Siemens)

Khaibov qunl dchv

Qun lktni Qun l

mngLp

iu

khin

Lp

truy

nhp

Lp

chuyn

ti

Truyn dn quang

Cng niPOTS,ISDN

IP,ATM,FR...CABLE

V tuyn

nh t uyn/ chuyn m ch nh t uyn/ chuyn m ch

Mng truynhp a dch v

PSTN/

ISDN

Ccmng hin c

DN

62Nguy

nThThuHng2008

5.2 Mng thh sau NGN

ng lc pht trin Cu trc v c im Mng NGN ca Vit Nam

T2002, VNPT phi hp vi hng Siemens(c) lp t thit b v thnghim mng NGN.

Thng 11-2003, VNPT lp t xong v a v o sdng pha 1 mng NGN, ch yu tp trung lp tmng core ca NGN.

nng cao nng lc mng li, VNPT u txydng pha 2 vo ngy 15-8-2004.

11/2006: Dn mrng VoIP pha 4

Hn ch ca PSTN v nhu cu Cu trc phn lp NGN


54/59

63Nguy

nThThuHng2008

Hn ch ca PSTN v nhu cupht trin NGN

Cng nhc trong vic phn b bng thng Kh khn trong vic t hp mng Kh khn trong vic cung cp dch v mi u tcho mng PSTN ln Gii hn trong pht trin mng

Khng p ng c stng trngnhanh cac c dch v dliu

64Nguy

nThThuHng2008

Cu trc phn lp NGN

Lp ng dng/

dch v

Lp iu khin

Lp chuyn tidch v

Lp truynhpdch v

Thit b u cui

Giao tip chun

Giao tip chun

Thnh

phnNGN

Thnh

phn clin quan

n NGN

Mngli

Lpqun

l

65Nguy

nThThuHng2008

M hnh mng NGN ca Siemens

Gii php mng NGN ca Siemens da trncu trc phn tn, xo i khong cch giamng PSTN v mng s liu. Cc h thnga ra vn da trn cu trc pht trin ca

h thng chuyn mch m ni ting caSiemens l EWSD

Siemens gii thiu gii php mng th hmi c tn SURPASS

66Nguy

nThThuHng2008

Cu trc mng th h sau (m hnh ca Siemens)Khai bo v qun

ldch v

Qun lkt ni Qun l

mngLp

iu

khin

Lp

truynhp

Lp

chuyn

ti

Truyn dn quang

Cng niPOTS,ISDN

IP,ATM,FR...CABLE

V tuyn

nh tuyn/ chuynmch nh tuyn/ chuynmch

Mng truy nhp a dch v

PSTN/

ISDN

Cc mng hin c

DN


55/59

67Nguy

nThThuH

ng2008

Cu trc mng th h sau (m hnh ca Siemens)

Phn chnh ca SURPASS l h thng SURPASS hiQ,y c th coi l h thng ch tp trung (centralizedserver) cho Lp iu khin ca mng vi chc nngnhmt h thng ca ng (gateway) mnh iukhin cc tnh nng thoi, kt hp kh nng bo hiumnh kt ni vi nhiu mng khc nhau. Trn hthng ny c khi chuyn i bo hiu bo hiu s 7ca mng PSTN/ISDN sang giao thc iu khin cang trung gian MGCP

Tu theo chc nng v dung lng, SURPASS hiQc chia thnh cc loi SURPASS hiQ 10, 20 hay

SURPASS hiQ 9100, 9200, 9400

68Nguy

nThThuH

ng2008

SURPASS hiG l h cc h thng ca ng trung gian(media gateway) t cc mng dch v cp di lnSURPASS hiQ, h thng nm bin mng ng trc,chu s qun l ca SURPASS hiQ. H ny c chc nng: Ca ng cho qun l truy cp t xa (RAS): chuyn i s liu t

modem hay ISDN thnh s liu IP v ngc li Ca ng cho VoIP: nhn lu lng thoi PSTN, nn, to gi v

chuyn ln mng IP v ngc li

Ca ng cho VoATM: nhn lu lng thoi PSTN, nn to gi vchuyn thnh cc t bo ATM, chuyn ln mng ATM v ngc

liSURPASS hiG c phn chia thnh nhiu loi theo chcnng v dung lng, t SURPASS hiG 500, 700, 1000 nSURPASS hiG 2000, 5000

Mng NGN ca Vit Nam

69Nguy

nThThuHng2008

SURPASS hiA l h thng truy nhp a dch v(Multi - Service Access) nm lp truy nhp caNGN, phc v cho truy nhp thoi, xDSL v ccdch v s liu trn mt nn duy nht. cung cpcc gii php truy nhp, SURPASS hiA c th kthp vi cc tng i PSTN EWSD hin c qua giaodin V5.2, cng nh cng vi SURPASS hiQ tonn mng th h mi. SURPASS hiA c phnchia thnh nhiu loi theo cc giao din h tr (htr thoi xDSL, truy nhp bng rng, leased - linekt ni Internet trc tip. Kt hp chc nng cang trung gian tch hp, gm c VolP/VoATM)thnh cc loi SURPASS hiA 7100, 7300, 7500

Mng NGN ca Vit Nam

70Nguy

nThThuHng2008

SURPASSNG Access

SURPASSNG Optics

SURPASSNG Switching

SURPASSNG Management

NGN Control

NGN Management

NGN Control

NGN Core

NGN Access

PSTN/Mobile Network

MediaGateways

Switc

Switc

Switc

MediaGateway

AccessGatewayMetro

Optics

IP/OpticalBackbone

Residential

Triple PlayVoice, Video,Data

Multi-ServiceAccess

Business

LA

PB

CP

SURPASShiQ

SURPASShiG

AccessIntegrator

TNMS

NetManager

SURPASS hiS

SURPASS hiXSURPASS hiT

SURPASShiG

Tn cc lp thit b trong h thng thit b NGN ca Siemens


56/59

Dn mrng VoIP pha 4


57/59

75Nguy

nThThuH

ng2008

Dn mrng VoIP pha 4

Nng cp softswitch ln hiE9200V3.2 Tng cng kh nng h tr cc c tnh ca cc

loi tng i : tng i transit, quc gia v quc t Cho VTN kh nng kt ni MEGACO/H.248 hay

MGCP

H tr giao din SIP kt ni ti cc SS khc vmin SIP khc.

hiG1200, hiG1100

hiQ4200 cho kt ni kinh doanh v thoingi sdng (fix and mobile network)

76Nguy

nThThuH

ng2008

77Nguy

nThThuHng2008

Dch v thoi VoIP tr trc 1719

Dch v thoi min ph 1800(Free Phone)

Dch v Thng tin gii tr 1900

(Premium rate service) Dch v mng ring oVirtual Private Network (VPN)

Dch v b o cuc gi t InternetCall Waiting Internet (CWI)

Dch v thoi qua trang Web (WDP)

Dch v thoi min ph t trang WEB(FCB)

Dchv cucgi thng mi min phComercial Free Call Service

CC DCH V DLIU

VoD (Video on Demand)

IPTV

TRUYN HNH HI NGH(Video Conferencing)

Dch v truy nhp INTERNET quaADSL

Gii thiu mt sdch v trn nn NGN ca VNPT

CC DCH VA PHNG TINCC DCH V THOI

78Nguy

nThThuHng2008

Dch v 17192.1. La chn ngnng2.2. Nhn dng s gi2.3. Nhn mc nhnPIN v kim tra(valid, blocked, in used, no credit)

2.4. Kt thcvic nhn dng thubaonghe thy m mi quay s

SURPASS

hiG 1000 V3T

SURPASS

hiG 1000 V3T

SURPASS

hiQ 9200

SURPASS

hiQ 9200

SURPASS

hiR 200

SURPASS

hiR 200

IP Core NetworkIP Core Network

MGCP

bearer

SS7

PSTN/ISDN

Switch

MGCP

bearer

SS7

Switch

PSTN/ ISDN

MGCP

2.Announcement&DTMFdialog

SURPASS

hiG 1000 V3T

SURPASS

hiG 1000 V3T

1719 xxxxDestination

1.Mtr

uynhp

dchvg

iquaSS7

4.Callset up

3. Quay sb gi B

3.Gis

bgi

B

1. 1719 L AnnouncementB number (PSTN routing)2. 1719 L Announcement

# B number (IP Routing)

1. 1719 L AnnouncementB number (PSTN routing)2. 1719 L Announcement

# B number (IP Routing)

Dch v

Dch v thoi min ph ttrang


58/59

79Nguy

nThThuH

ng2008

1800/1900

80Nguy

nThThuH

ng2008

p gweb (Free Call Button)

HTTP(S)

SS7 ISUP

PSTN Network

hiG 1000 VxP PSTN Network

TIF

SS7 ISUP

PRI

TDM trunkTDM trunk

Web browserPC phone application

SwitchSwitch

H.323

Called/ Calling Party

hiQ 4000

FreecallButtonServer

IP Network

SIP/PINT+

Web serverof company

hiQ 30

LDAP

81Nguy

nThThuHng2008

Dch v hi ngh truyn hnh(Video Conferencing)

82Nguy

nThThuHng2008

Dch v hi ngh truyn hnh(Video Conferencing)

Dch v mng ring o MegaWAN(VPN)


59/59

83Nguy

nThThuHng2008

Dch v IPTV

Truyn hnh qua mng sdng giao thc IP

IP Network

Operator

Headend

TV via STB

Operator AccessNetwork

Live Media

On-Demand Media

84Nguy

nThThuHng2008

(VPN)

http://www.vtn.com.vn

85Nguy

nThThuHng2008

Dch v MegaVNN

86Nguy

nThThuHng2008

Tham kho[1]. Ti liu tp hun NGN - Nguyn Qu Minh Hin -

2003[2]. nh hng t chc mng vin thng ca VNPT

n 2010 TCT Bu chnh vin thng Vit Nam,H Ni, 08-2001, trang 1-20

[3] Thng tin v cc dch v trn nn NGN ca VNPT doVTN cung cp, http://www.vnpt.com.vn,http://www.vtn.com.vn

[4] http://www.siemens.com/surpass[5] nh ngha ca ITU-T v NGN:http://www.itu.int/ITU-

T/studygroups/com13/ngn2004/working_definition.html

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