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TS.V Trng Sn Bi ging K thut ghp knh s 1
CHNG 3
K thut ghp knh s ng b SDH
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Ni dung chng 3
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.52
Cc phn t mng SDH v cc gii php
duy tr mng.3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
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Ni dung chng 3
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.52
Cc phn t mng SDH v cc gii php
duy tr mng.3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
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PDH vnhc im ca n
Trc SDH, cc mng truyn dn da trn PDH. Plesiochronous trong PDH c ngha l cn ng b.
Vic ghp t E1 ln E4 phi thng qua 2 cp trung gian l E2
v E3. Tn ti 3 chun ghp khc nhau
Cc khung c cc cu trc khc nhau
Qun l hot ng v cnh bo trong PDH i hi cc thit bring.
Xen r phc tp v tn km
. . .
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u im ca SDH so vi PDH
SDH da trn nguyn l ghp knh ng b trc tip V bn cht, cc tn hiu chm hn, ring bit c th c
ghp trc tip vo cc tn hiu SDH c tc cao hn mkhng cn cc cp ghp trung gian.
SDH linh ng hn PDH ng thi ci tin c tnh bodng v qun l mng.
C th s dng trong cc loi mng vin thng truyn
thng; c th s dng mang cc lung video CATV.
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TS.V Trng Sn Bi ging K thut ghp knh s 6
Ghp knh tng cp trong PDH
Trong PDH, khi ghp knh t E1 ln E4 cn c 21 b ghpknh: 16 x 2DME 4 x 3DME 1 x 4DME
Cn nhiu on cp ni gia cc DME
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TS.V Trng Sn Bi ging K thut ghp knh s 7
Xen r lung E1 t lung E4
4DME
4DME
2DME
2DME
3DME
3DME
140 Mbps 140 Mbps34 Mbps 34 Mbps
8 Mbps 8 Mbps
2 Mbps
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Xen/ r trong SDH
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SDH l g?
SDH l phn cp ghp lung th cp ng b. C s ca SDH (Synchronous Digital Hierarchy):
ghp knh ng b
d liu t cc lung cp thp c ghp xen byte ln cc lung cpcao hn.
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TS.V Trng Sn Bi ging K thut ghp knh s 10
Nguyn l ghp xen byte
MUX
C s ca SDH (Synchronous Digital Hierarchy) l ghp knh ng b,
d liu t cc lung cp thp c ghp xen byte
to ra lung cp cao hn.
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c im ca SDH
Cc knh c ghp ti cc v tr c nh c quan h vi ccbyte trong khung.
Vic phn knh thc hin bng cch ly ra cc bytes cn thitt lung s.
iu ny cho php cho php: r/xen mt knh n trc tip t lung s
m khng cn phn knh tng cp nh trong PDH.
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TS.V Trng Sn Bi ging K thut ghp knh s 12
Cc tc trong SDH
SDH l mt phn cp truyn ti trn c s ghp cc lung155.52 Mbit/s. (STM = Synchronous Transport Module)
Mi tc l chnh xc bng bi ca tc ca lung cpthp, v vy phn cp ny l ng b
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Cc tc trong SDH
Cc lung Tc d liu(Mbps)
Tc ti trng(Mbps)
STM-1 155.52 150.336
STM-4 622.08 601.344
STM-16 2488.32 2405.376
STM-64 9953.28 9621.50
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Ni dung chng 3
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii phpduy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
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Phn cp trong SDH
Cc lung bc cao c to ra bng cch ghp xen bytes cclung cp thp: STM-4 c ghp t
4 lung STM-1 STM-16 c ghp t
16 lung STM-1
hoc 4 lung STM-4
STM-64 c ghp t 64 lung STM-1
hoc 16 lung STM-4
hoc 4 lung STM-16.
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TS.V Trng Sn Bi ging K thut ghp knh s 16
Phn cp trong SDH
Ring lung STM-1 c to ra t cc lung PDH: 1 lung E4
3 lung E3
63 lung E1 84 lung T1
21 lung T2
3 lung T3
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Phn cp SDH
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TS.V Trng Sn Bi ging K thut ghp knh s 18
Phn cp SDH (ETSI)
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Container
C : Container, l n v thng tin dng ng b ho cc lung PDH vomi trng SDH (khung STM).
n v kch thc ca Container tnh theo bytes.
Thi gian ca cc loi container u bng 125s.
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Container (tt)
C cc container sau: C4: dng ghp lung E4 (kch thc 2340 bytes).
C3: dng ghp lung E3, T3 (kch thc 756 bytes).
C2: dng ghp lung T2 (kch thc 106 bytes). C11: dng ghp lung T1 - 1,5Mbps (kch thc 25 bytes).
C12: dng ghp lung E1 - 2 Mbps (kch thc 34 bytes).
c th a cc lung PDH v cc container tng ng cn s dng cc bit chn c nh v chn c hi (chn dng, chn m, chn khng).
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TS.V Trng Sn Bi ging K thut ghp knh s 21
SDH v tn hiu khng ng b
Ti vng giao tip
PDH/SDH cc bit chn c s dng
khi tn hiu PDH c avo Container tng ng.
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Cc container o trong SDH
Khi mi mt C c to ra byte t mo ng dn (POH) c gn thm vo
to thnh Container o (VC) .
POH (Path Overhead) c cha cc thng tin v hot ng,
cnh bo
v cc thng tin qun l khc.
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TS.V Trng Sn Bi ging K thut ghp knh s 23
Cc container o trong SDH
Mt ng dn (path): i ngang qua 1 mng SDH
tn ti t im tn hiu PDH c a vo C
n im tn hiu PDH c khi phc li t C. POH i cng vi C (to thnh VC) thng qua ng dn.
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Cc container o trong SDH
C cc container o sau: VC4: kch thc 2349 bytes.
VC3: kch thc 765 bytes.
VC2: kch thc 107 bytes.
VC11: kch thc 26 bytes.
VC12: kch thc 35 bytes.
Cc VC4, VC3 c gi l cc VC bc cao; Cc VC11, VC12, VC2 c gi l cc VC bc thp.
Thi gian ca cc VC cng l 125s.
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n v qun l AUNhm n v qun l - AUG
Cc VC bc cao c gn thm con tr to thnh n v qun l tng ng.
Chc nng ca con tr l: ghi li mi lin h v pha gia khung STM-1
vi VC bc cao c ghp vo.
C th hiu y, phase l v tr bt u mt VC trong khung STM-1.
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n v qun l AUNhm n v qun l - AUG
C 2 loi AU l: AU3: kch thc 768 bytes
AU4: kch thc 2358 bytes
AU4 tng ng vi AUG (nhm n v qun l).
3 AU-3 ghp xen byte vi nhau to thnh mt AUG.
Thi gian ca cc AU v AUG cng l 125s.
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n v qun l - AU
AU4 c th truyn trc tip vo STM-1 bng cch gn thm cc t mo on truyn dn (SOH).
3 AU3 c th truyn vo STM-1 bng cch ghp xen bytes vi nhau to thnh AUG
v gn thm cc t mo on truyn dn (SOH).
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n v lung s TU (TributaryUnit)
Tr VC-4, tt c cc VC cn li c th a vo mt VCln hn trc khi chuyn vo khung STM-1.
Khi cn thit phi ghi li mi lin h v phase gia VC bc
thp vi VC bc cao hn. C th hiu y, phase l v tr bt u mt VC bc thp
trong mt VC bc cao hn.
Chc nng ny c thc hin bi con tr.
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n v lung s TU
Mt VC bc thp c gn thm con tr gi l n v lungs.
C cc TU sau: TU3: kch thc 768 bytes. TU2: kch thc 108 bytes. TU11: kch thc 27 bytes. TU12: kch thc 36 bytes.
Thi gian ca cc TU cng l 125s.
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Nhm n v lung s TUG
Trc khi a vo VC bc cao hn, cc TU c ghp xen bytes vi nhau
to thnh nhm n v lung s (TUG).
Thi gian ca cc TUG l 125s.
C cc TUG sau:
TUG-2
TUG-3
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TS.V Trng Sn Bi ging K thut ghp knh s 31
Nhm n v lung s TUG
TUG-2 c to ra bng mt trong cc cch sau: Ghp xen bytes 4 x TU-11
Ghp xen bytes 3 x TU-12
Tng ng mt TU-2 TUG-3 c to ra bng mt trong cc cch sau:
Ghp xen bytes 7 x TUG-2
Tng ng mt TU-3
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Cu trc khung STM-1
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Truyn dn cc khung STM
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Cu trc khung STM-N
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Cu trc khung STM-N
C 3 vng chnh trong khung STM-N: SOH
Con tr n v qun l (AU pointer), v
Ti trng thng tin
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TS.V Trng Sn Bi ging K thut ghp knh s 36
Thng tin mo uM hnh phn lp
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Thng tin mo uM hnh phn lp
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Thng tin mo uMo u on (SOH) ca STM-1
A1
B1
D1
A1
B2
D4
D7
D10
S1
A1 A2 A2 A2 J0
AU-4 Pointer
E1
D2 D3
F1
B2 B2 K1
D5
D8
K2
D6
D9
D12D11
E2M1
RSOH
1 2 3 4 5 6 7 8 9
1
2
3
4
5
6
7
8
9
MSOH
Mo u on chuyn tip
Mo u on ghp knh
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Thng tin mo uRSOH ca STM-1
Cc bytes ng b khung, dng ch r im bt u khung STM-1
Gim st li on lp (BIP-8),dng tnh bit chn l cho ton b khung trc
D vt on chuyn tip (RS), dng xc minh kt ni
Byte nghip v RS,cung cp kt ni voice nghip v 64 kbit/s cho nh iu hnh mng
Knh ngi dng RS,cung cp knh ngi dng 64 kbit/s cho nh iu hnh mng
Knh truyn s liu RS (DCC) 192 kbit/s,
Knh DCC phc v cc hot ng vn hnh, bo dng v qun l
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Thng tin mo uMSOH ca STM-1
Gim st li on ghp knh MS (BIP-24),dng tnh bit chn l cho ton b khung trc
Byte nghip v MS,cung cp kt ni voice nghip v 64 kbit/s cho ngi iu hnh mng
Knh truyn s liu MS (DCC) 576 kbit/s,Knh DCC phc v cc hot ng vn hnh, bo dng v qun l
Ch th li t xa MS (REI),Ch ra s lng nhm b li BIP-24 thu c ti u xa
Chuyn mch bo v t ng (APS), Knh truyn thng tin cnh bo v lnhchuyn mch d phng khi h thng chnh c s c.
Trng thi ng b, Cht lng ca lung STM-1 khi c s dng lm ngun
nh thi v ng b.
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Thng tin mo uPOH bc cao (ca VC3/4)
Vt ng, dng xc minh kt ni
Gim st li ng (BIP-8), tnh bit chn l cho ton b Container trc
Trng thi ng, gim st trng thi ng trn c hai hng
Knh ngi dng ng, knh ngi dng 64 kbit/s cho nh iu hnh mng
Chuyn mch bo v t ng (APS), bo v ng.
Byte iu hnh mng, mo u kt ni chuyn tip bc cao.
Nhn tn hiu ng, ch ra kiu xp xp ti tin trong VCn
Ch th a khung TU, bt u a khung
Knh ngi dng ng, knh ngi dng 64 kbit/s cho nh iu hnh mng
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Thng tin mo uPOH bc thp (ca VC2/1)
BIP-2 / ch th li khi t xa (REI) / ch th li t xa (RFI) /nhn tn hiu/ ch th s c u xa (RDI)
Chuyn mch bo v t ng (APS), bo v ng.
Vt ng, dng xc minh kt ni
Byte iu hnh mng, mo u kt ni chuyn tip bc thp
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Thng tin mo uPOH bc thp (ca VC2/1)
POH bc thp bao gm 4 bytes Mi byte l mo u cho mt khung
4 khung vi cc byte mo u V5
J3 N2
K4
t chc thnh mt a khung.
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Ni dung chng 3
Tho lun3.7
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii php
duy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
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Ghp knh STM-1
Cc lung s n b ghp knh c th c to ra t ccng h c tc khc nhau.
Chng khng nht thit ng b vi nhau hay vi ng hghp knh
SDH l mng ng b! gii quyt vn ny, b ghp knh SDH tm im bt
u ca tng khung trong mi lung
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Ghp knh STM-1
Hnh nh minh ha: xe gong Cc container c th di chuyn bn trong xe gong
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Ghp knh STM-1
SDH l mt phng php mi ghp cc tn hiu chm vomt tn hiu nhanh hn. C c ch ng x i vi cc lung s khng cng tc ng h.
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Ghp knh STM-1 Hnh nh tng t trong
SDH: VC-4 tri ni trong phn
ti trng ca STM-1
VC-4 c th bt u t mtv tr no trong phn titrng ca STM-1
Con tr ch ra v tr bt uny.
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P
Bt u VC-4 tiptheo
Bt u VC-4
P
Cc bytes POH
Khung STM-1 # N
Khung STM-1 # N+1
Con tr AU-4
C AU 4
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Con tr AU-4
H3H3H31*1*H2YYH1
3 bytes c hing chnh m
3 bytes c hing chnh dng
Vng ti trngVng con tr
111111111001UU11
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Con tr AU-4
DIDIDIDIDISSNNNN
16151413121110987654321
H1 H2
N: bit c d liu mi (NDF) I: bit tng
S: bit ch kch c con tr D: bit gim
SS=10 : cho con tr AU-4 / AU-3 / TU-3
NNNN= 0110: bnh thng
NNNN= 1001: ng chnh VC khng bnh thng (d liu mi)
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Con tr AU-4
DIDIDIDIDISSNNNN
16151413121110987654321
H1 H2
Bnh thng: 10 bit IDIDIDIDID ch v tr bt u ca VC-4trong vng ti trng
N = (3 x P) + 1 N : Khong cch tnh t Byte H3 cui cng n Byte J1 (bytes).
( di con tr)
P: gi tr ca 10 bit IDIDIDIDID.
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Con tr AU-4
SOH
SOH
SOH
SOH
VC-4VC-4POH
0000000000010110
DIDIDIDIDISSNNNN
IDIDIDIDID=0000000000
P = 0
N = (3 x P) + 1 = 1
Byte J1 nm cch Byte H3 cuicng 1 byte, tc l nm ngay bnphi Byte H3 cui cng.
J1 nm hng? Ct ?
STM-1#N
STM-1#N+1
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P
Bt u VC-4 tiptheo
Bt u VC-4
P
Cc bytes POH
STM-1#N
Con tr AU-4
STM-1#N+1
IDIDIDIDID=0000101110
P= 86
N=(3 x P) + 1 = 259
J1 nm hng? Ct ?
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Con tr AU-4
SOH
SOH
SOH
SOH
VC-4VC-4PO
H
IDIDIDIDID= 0000101111
P = 87
N = (3 x P) + 1 = 262
J1 nm hng? Ct ?
STM-1#N
STM-1#N+1
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Con tr AU-4SOH
SOH
SOH
SOH
VC-4VC-4PO
H
IDIDIDIDID= 0000101111 P = 696
N = (3 x P) + 1 = 2089
J1 nm hng? Ct ? STM1#?
STM-1#N
STM-1#N+1
STM-1#N+2
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Con tr AU-4SOH
SOH
SOH
SOH
VC-4VC-4PO
H
STM-1#N
STM-1#N+1
STM-1#N+2
IDIDIDIDID= 1100001110 P = ?
N = (3 x P) + 1 = ?
J1 nm hng? Ct ? STM1#?
P= 0 ~ 782
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SOH
SOH
VC-4 (Virtual container)VC-4 (Virtual container)POH
Con tr AU-4 tr v tru tin ca VC
1 260 bytes
9
POH = Path overhead
Ghp knh STM-1
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SOH
SOHVC-4 (Virtual container)VC-4 (Virtual container)
Khi tc ng h VC-4 b hn tc ng h STM-1=> Gi tr con tr c tnh tin ln pha trc 3 bytes
3 Bytes trngc chn y
C
MiGi tr
con trc cp
nht
ng chnh con tr (dng)
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H3 H3 H3
(H1, H2)=(0110100000000011)
STM-1 # 1
H3 H3 H3(H1, H2)=(0110100000000011)
# 2
H3 H3 H3
(H1, H2)=
(0110101010101001)
# 3
H3 H3 H3
(H1, H2)=(0110100000000100)
# 4
(3 3 3) J1
(3 3 3) J1
(4 4 4) J1
(4 4 4) J1
3 bytes chn
1
4
1
4
1
4
1
4
9
9
9
9
Cc bit I b o
ng chnh con tr (dng)
Bt u VC-4
X ti thi im ts
(Gi tr con tr mi)
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SOH STM-1 payload
VC-4 (Virtual container)VC-4 (Virtual container)
Khi tc ng h VC-4 ln hn tc ng h STM-1
=> Gi tr con tr c tnh tin li pha sau 3 bytes
3 Bytes VC ccha ti y
Con tr AU-4
c
Mi
ng chnh con tr (m)
Gi trcon tr
c cpnht
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H3 H3 H3
(H1, H2)=(0110100000000011)
STM-1 #1
H3 H3 H3(H1, H2)=(0110100000000011)
# 2
(H1, H2)=(0110100101010110)
# 3
H3 H3 H3
(H1, H2)=(0110100000000010)
# 4
(3 3 3) J1
(3 3 3) J1
(2 2 2) J1
(2 2 2) J1
1
4
1
4
1
4
1
4
9
9
9
9
Cc bit D b o
ng chnh con tr (m)
Bt u VC-4
X ti thi im ts
(Gi tr con tr mi)
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STM-1 PointersLocations
AU-4 pointer
A1
H1 Y Y H2 I I H3 H3 H3VC-4
(E-4 mapping)
AU-3 pointer
A1
H1 H1 H1 H2 H2 H2 H3 H3 H33 VC-3s
(DS-3 mapping)
Con tr AU-3
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TS.V Trng Sn Bi ging K thut ghp knh s 64
Con tr AU 3
H3H3H3H2H2H2H1H1H1
3 bytes c hing chnh m
3 bytes c hing chnh dng
Vng ti trngVng con tr
Mt AUG c th 3 AU-3: Mi AU-3 c 3 bytes con tr: H1, H2, H3 Khi ghp thnh mt AUG to thnh 9 Bytes con tr
Mi b H1, H2, H3 cng mt trong 3 bytes ngay sau Byte H3 cuicng: tr v tr v ng chnh cho mt VC-3 tng ng
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Con tr AU-3
DIDIDIDIDISSNNNN
16151413121110987654321
H1 H2
Cu trc mi cp H1, H2: nh trong con tr AU-4
C 3 cp H1, H2: Cp th nht: tr VC-3 th nht, cc bytes: 1, 4, 7, 10 Cp th hai: tr VC-3 th hai, cc bytes: 2, 5, 8, 11
Cp th ba: tr VC-3 th ba, cc bytes: 3, 6, 9, 12
P = (3 x N) + 1 = 0 ~ 782
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TS.V Trng Sn Bi ging K thut ghp knh s 66
Con tr TU-3RSOHRSOH
MSOHMSOH
TTi tri trng VCng VC--4: C44: C4 hohocc TUGTUG--33J1J1B3B3
C2C2
G1G1
F2F2
H4H4
F3F3K3K3
N1N1
H1H1
H2H2
H3H3
H1H1
H2H2
H3H3
TTiitrtrngng
CC--33
J1J1
B3B3
C2C2
G1G1
F2F2
H4H4
F3F3K3K3
N1N15 ct
POH bPOH bc caoc cao
AU PointerAU Pointer
TTiiTrTrngng
CC--33
J1J1
B3B3
C2C2
G1G1
F2F2
H4H4
F3F3K3K3
N1N1
POH bPOH bc thc thpp
TTiiTrTrngng
CC--33
H1H1
H2H2
H3H3 J1J1
B3B3
C2C2
G1G1
F2F2
H4H4
F3F3K3K3
N1N1
Hai cHai ct nht nhii
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Con tr TU-3 S dng tr v tr
ca mt VC-3 trongmt VC-4.
Cch tnh v hot
ng: tng t con trAU-4
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Con tr TU-3
N= (3xP) + 1 P= 0 ~ 764
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Con tr TU-12
Con tr TU-12 tr v tr caVC-12 trong khung TU-12 V1, V2, V3: nh H1, H2, H3 V4: cha s dng
a khung TU-12
Khung TU-12
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Con tr TU-12
V1 V2 V3
N N N N S S I D I I I ID D D D
V4
S S : TU size0 0 TU-21 0 TU-121 1 TU-11
Hot ngcon tr
Cha sdng
T chc v hot ng ca cc con tr TU12, TU11 v TU2 l ging nhau
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TS.V Trng Sn Bi ging K thut ghp knh s 71
Con tr TU-12 Gi tr con tr TU-12:
cha trong cc bytes V1 v V2 Ch ra di t byte V2 n byte u tin ca a khung VC-
12 (Byte V5).
Khng m cc Byte V3 v V4
Gi tr con tr: 0 ~ 139 Gi tr con tr bng 0: Byte V5 nm ngay sau Byte V2.
Gi tr con tr bng 35: Byte V5 nm ngay sau Byte V3.
Gi tr con tr bng 139: Byte V5 nm ngay trc Byte V2ca a khung sau.
Cc Byte c hi ng chnh: V3: c hi ng chnh m
Byte ngay sau Byte V3: c hi ng chnh dng
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Ghp E4 vo STM-1
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Ghp E4 vo STM-1
140 Mbit/s -> STM-1
140M Thch ngTc
+ POH
1
C4
1 260
9
125s
1 1
9
VC4
PO
H
125s1 261
Trang
sau
Xp xp B tr
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TS.V Trng Sn Bi ging K thut ghp knh s 74
Ghp E4 vo STM-1
ng b + SOH
261
AU-4
1
1
9
ng b B tr
ng ghp knh: 1X140M 1XAU-4 AUG Mt STM-1Mt STM-1 c th mang 1 tn hiu 34Mbit/s
AU4-PTR
STM-1
1
1
9
Con tr
261
MSOH
RSOH
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TS.V Trng Sn Bi ging K thut ghp knh s 75
Ghp E4 vo STM-1
VC-4
W=IIIIIIII
X= CRRRRROO
Y=RRRRRRRR
Z=IIIIIISR
I: bit thng tin
S: bit chn c hiC: bit ch th chn
R: bit chn c nh
0: bit mo u
W
Z
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TS.V Trng Sn Bi ging K thut ghp knh s 76
Ghp E4 vo STM-1 Theo tnh ton:
Mi hng ca C-4 c 260 byte x 8 = 2080 bit Lung E4 cung cp cho mi hng ca C-4:
139,264 Mbit/s * 125 s / 9 = 1934,222.. bit
Cn chn: 2080 - 1934,222 = 145,778 bit
Theo btr trn: Sbit thng tin trn mi hng: 20 * 96 + 8 + 6 = 1934 Cn li 1934,222 1934 = 0,222 bit do bit S chn c hi.
ng vai tr chn cnh (145 bit): 5 Byte X, v 13 byte Y: 18 * 8 = 144 bit Bit R Byte Z: 1 bit
5 bit C 5 byte X: ch th chn cho bit S (11111->chn)
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Ghp E3 vo STM-1
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TS.V Trng Sn Bi ging K thut ghp knh s 78
Ghp E3 vo STM-1
34 Mbit/s -> STM-1
34M Thch ngTc
+ POH
1
C3
1 84
9
125s
1 1
9
VC3
PO
H
125s1 85
Trang
sau
Xp xp B tr
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TS.V Trng Sn Bi ging K thut ghp knh s 79
Ghp E3 vo STM-1
ng bLn
thnht
Lp y
1 86
1
9
H1H2H3
R
3
86
TU-3
1
H1H2H3
1
9
POH
R R
VC-4
9
1
1 261
ng b Nhi
TUG-3
Ghp knh
3
Tng tvi C4
ng ghp knh: 1X34M 1XTU-3 3XTUG-3 1XAU-4--- Mt STM-1Mt STM-1 c th mang 3 tn hiu 34Mbit/s
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TS.V Trng Sn Bi ging K thut ghp knh s 80
Ghp E3 vo STM-1
VC-3X=rrrrrrc1c2Y=rrrrrrrs1
Z=s2iiiiiii
R=rrrrrrrrI=iiiiiiii
i: bit thng tin
s1, s2: bit chn c hi
c1, c2: bit ch th chn
r: bit chn c nh
IZYRR5(R+3I)X+5(3I+R)R5(R+3I)R4(R+3I)
3xIXR5(R+3I)X+5(3I+R)R5(R+3I)R4(R+3I)
3xIXR5(R+3I)X+5(3I+R)R5(R+3I)R4(R+3I)
84 Ct
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TS.V Trng Sn Bi ging K thut ghp knh s 81
Ghp E3 vo STM-1 Theo tnh ton:
Mi 3 hng ca C-3 c 84 x 3 x 8 = 2016 bit Lung E3 cung cp cho mi 3 hng ca C-3:
34,368 Mbit/s * 125 s / 3 = 1432 bit Cn chn: 2016 - 1432 = 584 bit
Theo btr trn: Sbit thng tin trn mi 3 hng: (60+60+58)x8+7= 1431. Hai bit chn c hi: s1s2 (mt chn m, mt chn dng) ng vai tr chn cnh (583 bit):
Cc Byte Xv R: 24 * 3 * 8 = 576 bit Bit R Byte Y: 7 bit
5 bit c1 5 byte X: ch th chn cho bit s1 5 bit c2 5 byte X: ch th chn cho bit s2
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TS.V Trng Sn Bi ging K thut ghp knh s 82
Ghp E1 vo STM-1
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TS.V Trng Sn Bi ging K thut ghp knh s 83
Ghp E1 vo STM-1
2 Mbit/s -> STM-1
2MTrangsau
125s
POH1 4
C12
1
9
VC12
1 4
1
9
TU12
1 4
1
9
TU-PTR
Thch ngtc
+ POH
Xp xp
+Con tr
B tr ng b
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TS.V Trng Sn Bi ging K thut ghp knh s 84
Ghp E1 vo STM-1
3
1 12
TUG-2
1
9
7 R R
TUG-3
1 86
Ghp knh
1
9
Ghp knhTng tnh vi C3
ng ghp knh: 1X2M 3XTU12 7XTUG-2 3XTUG-3 1XSTM-1Mt STM-1 c th mang 3X7X3 = 63 lung 2MCu trc ghp knh: 3-7-3
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TS.V Trng Sn Bi ging K thut ghp knh s 85
Ghp E1 vo STM-1
32xI
R
K4
32xI
R
N2
c1c2oooorr
R
31xI
s2iiiiiii
c1c2rrrrrs1
c1c2oooorr
J2R
32xI
R
V5
125s
250s
375s
500s
a
khungVC-12,140bytes
Mt C-12: C 34 byte Mang 32 byte E1
2 byte chn c nh
Mt a khung: S dng hai bit chn c hi:
S1: chn m (ch th: c1c1c1)
S2: chn dng (ch th: c2c2c2)
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TS.V Trng Sn Bi ging K thut ghp knh s 86
Ni dung chng 3
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii phpduy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
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TS.V Trng Sn Bi ging K thut ghp knh s 87
Cc phn t mng trong SDH B ni cho (Digital Cross-Connect - DCS / DXC)
B xen / r (Add/Drop Multiplexer - ADM)
B ghp knh (Terminal Multiplexer TMX / PTE)
Ngoi ra: B chuyn tip (Regenerator) B chuyn i bc sng (Transponder)
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TS.V Trng Sn Bi ging K thut ghp knh s 88
Cc phn t mng trong SDH B ni cho (DCS/DXC):
S dng trong cc mng dng li Cc giao tip STM-N l ch yu
Ma trn chuyn mch ln (1024 STM-N)
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TS.V Trng Sn Bi ging K thut ghp knh s 89
Cc phn t mng trong SDH B xen / r (ADM)
S dng trong cc mng ring C 2 giao tip STM-N (phi/tri)
Mt s lng ln giao tip cc lungs: STM-1, E4, E3, E1.
B xen / r STM-4
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TS.V Trng Sn Bi ging K thut ghp knh s 90
S khi
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TS.V Trng Sn Bi ging K thut ghp knh s 91
Cc phn t mng trong SDH B ghp knh (TMX / PTE)
S dng nh b tp trung (Hub) Giao tip ng STM-1/4
Cc giao tip lung s E1 l ch yu
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TS.V Trng Sn Bi ging K thut ghp knh s 92
Cc phn t mng trong SDH B chuyn tip:
u vo: tn hiu STM-N u vo: tn hiu STM-N
Khi ph tn hiu truyn dn gim trt v tn sc
h
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TS.V Trng Sn Bi ging K thut ghp knh s 93
Cc phn t mng trong SDH B chuyn i bc sng:
u vo: tn hiu STM-N ti bc sng 1 u vo: tn hiu STM-N ti bc sng 2 Thay i bc sng ca tn hiu truyn dn
C h h S
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TS.V Trng Sn Bi ging K thut ghp knh s 94
Cu hnh mng SDH
C h h SDH
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TS.V Trng Sn Bi ging K thut ghp knh s 95
Cu hnh mng SDH Cc mng truyn thng s dng cc cu hnh im im, li v
hub. Mng SDH s dng cc cu hnh m rng hn.
C h h SDH
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TS.V Trng Sn Bi ging K thut ghp knh s 96
Cu hnh mng SDH Mng SDH cho php cc cu hnh trc y c th t hp vi cc cu
hnh vng (Ring) hoc chui (chain) ca cc ADM.
Cu hnh mng SDH
i i
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TS.V Trng Sn Bi ging K thut ghp knh s 97
im im Dung lng ln (vi DWDM)
t tuyn V d: cc tuyn cp bin kt ni gia cc chu lc.
Cu hnh mng SDH
Ri B T St
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TS.V Trng Sn Bi ging K thut ghp knh s 98
Ring, Bus, Tree v Star Dung lng khc nhau
Nhiu tuyn V d: cc mng truy nhp.
Cu hnh mng SDH
L i
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TS.V Trng Sn Bi ging K thut ghp knh s 99
Li Dung lng ln
Nhiu tuyn V d: mng truyn ti.
C ii h d t
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TS.V Trng Sn Bi ging K thut ghp knh s 100
Cc gii php duy tr mng Trong thi gian mt chuyn mch bo v t ng (APS):
Mng b mt lu lng Dn n nh khai thc mt tin
V vy, kim tra hot ng chnh xc ca APS l rt quan trng i vinh khai thc
Tham s chnh l thi gian chuyn mch. Khuyn ngh: ti a l 50ms khi phc mt tn hiu ng.
Cc gii php duy tr mng
Bo v 1+1
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TS.V Trng Sn Bi ging K thut ghp knh s 101
Bo v 1+1 Mi knh SDH hai hng (2 si quang) s dng mt knh d phng
ring (2 si quang). D tha nht
t nht
Cc gii php duy tr mng
Bo v 1:N
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TS.V Trng Sn Bi ging K thut ghp knh s 102
Bo v 1:N Mi knh SDH hai hng (2 si quang) chia s chung mt knh d
phng (2 si quang). D tha t nht
Hiu qu nht
Cc gii php duy tr mng
Bo v 1+1 v 1:N
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Bo v 1+1 v 1:N
Cc gii php duy tr mng
Bo v Vng
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TS.V Trng Sn Bi ging K thut ghp knh s 104
Bo v Vng
Vng bo v chia s MS hai hng
Trng thi bnh thng
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TS.V Trng Sn Bi ging K thut ghp knh s 105
Trng thi bnh thng
Vng bo v chia s MS hai hng
Trng thi li (Failed)
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TS.V Trng Sn Bi ging K thut ghp knh s 106
Trng thi li (Failed)
Vng bo v ring MS mt hng
Trng thi bnh thng
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TS.V Trng Sn Bi ging K thut ghp knh s 107
Trng thi bnh thng
Vng bo v ring MS mt hng
Trng thi li (Failed)
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TS.V Trng Sn Bi ging K thut ghp knh s 108
Trng thi li (Failed)
Bo v ng
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Bo v ng
Ni dung chng 3
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Ni dung chng 3
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii phpduy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container
3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
Trin khai SDH hin ti
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TS.V Trng Sn Bi ging K thut ghp knh s 111
Tt c cc giao tim STM-N u tham kho ti PRS (Ngun tham kho s cp) Phn phi nh thi ti CB v chuyn mch DS0 trc tip thng qua cc ng STM-N
ng h mng(Stratum 1)
DS0Switch
CB CB
BITS
E1E1 E1
0.000001 ppm
STM-16
STM-1STM-1 STM-1
STM-4
STM-1
Trin khai SDH hin ti
Cc m hnh ng b cho cc
phn t mng
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TS.V Trng Sn Bi ging K thut ghp knh s 112
phn t mng Mi mt phn t mng phi c cu hnh ng b thi
gian Phn phi tn hiu tham kho nh thi nn tr nh nht
Cc cu hnh tn hiu nh thi khc nhau:
nh thi t ngun ngoi nh thi ng dy
nh thi vng
nh thi truyn thng
nh thi t ngun ngoi
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TS.V Trng Sn Bi ging K thut ghp knh s 113
WEST
EAST
Phn tmng
BITS
nh thi t ngun ngoi Tt c cc tn hiu c pht i t mt nt c ng b
t mt ngun bn ngoi, thu c ti nt , tc l ngunnh thi BITS BITS= Building Integrated Timing Signal (Ngun cp tn hiu
nh thi tch hp)
nh thi ng dy
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TS.V Trng Sn Bi ging K thut ghp knh s 114
WE
ST
EA
ST
Phn tmng
nh thi ng dy Tt c cc tn hiu c pht i t mt nt c ng b
vi mt tn hiu thu c c s dng khi SDH NE c cu hnh lm b ADM
nh thi vng
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TS.V Trng Sn Bi ging K thut ghp knh s 115
WEST
EAST
Phn tmng
nh thi vng Tn hiu nh thi c ly t tn hiu quang vo, sau
c s dng lm ng h cho cc ng quang ra. p dng cho mt SDH NE (phn t mng SDH) lm vic
ch kt cui.
nh thi truyn thng
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TS.V Trng Sn Bi ging K thut ghp knh s 116
nh thi truyn thng
WE
ST
EA
ST
Phn tmng
Tn hiu truyn theo mt hng quanh vng c ng b
ha vi tn hiu thu c trn cng hng .
Phn cp phn phi nh thi
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TS.V Trng Sn Bi ging K thut ghp knh s 117
cp p p t
Ni dung chng 3
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TS.V Trng Sn Bi ging K thut ghp knh s 118
g g
Tho lun3.6
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii phpduy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1
Cc bt thng, khim khuyt,
li v cnh bo (I)
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TS.V Trng Sn Bi ging K thut ghp knh s 119
( ) Cc bt thng (Anomalies):
Cc li BIP B1 / B2 / B 3 Ch th li khi t xa (REI)
Cc khim khuyt (Defects): Cc bt thng lin tc vt qu mt gii hn thi gian cc i
Mt tn hiu (LOS)
Mt ng b khung (LOF)
Mt con tr (LOP)
Tn hiu ch th cnh bo (AIS), ch th khim khuyt t xa (RDI)
Cc bt thng, khim khuyt,
li v cnh bo (II)
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TS.V Trng Sn Bi ging K thut ghp knh s 120
( ) Cc li (Failures):
Cc khim khuyt lin tc vt qu mt gii hn thi gian cc i Cc cnh bo (Alarms):
Cc tn hiu bo dng cnh bo cc thit b pha cui ng truynl mt li thit b hoc khim khuyt c pht hin
Gim st hot ng v cnh bo Cc bt thng, khim khuyt v li c bo co cho OAM chc
nng
Cc khim khuyt:
Bo hiu cc hng i v v
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TS.V Trng Sn Bi ging K thut ghp knh s 121
Ni dung chng 3
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TS.V Trng Sn Bi ging K thut ghp knh s 122
g g
Tho lun3.7
2Qun l mng SDH3.6
2ng b mng SDH3.5
2Cc phn t mng SDH v cc gii phpduy tr mng.
3.4
3Con tr trong SDH v xp xp tn hiuvo container3.3
3Phn cp tn hiu s SDH (cu trckhung, tc , cc thng tin mo u)
3.2
2ng lc cho sra i ca SDH3.1