bao cao ewsd

7/29/2019 Bao Cao Ewsd

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i Hc Giao Thng Vn Ti C S 2 Bo co thc t p tt nghi p

KIN NHN XT CA N V HNG DN THC TP

Knh gi: Trng i hc Giao thng Vn ti c s II

Cng ty ABC nhn xt v vic thc tp ca sinh vin: Nguyn Vn A chuyn ngnh

K thut vin thng nh sau:

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Ngy ........ thng ........nm........

Cng ty ABC

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LI NI U

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MC LC

KIN NHN XT CA N V HNG DN THC TP.......................2

LI NI U.........................................................................................................3MC LC................................................................................................................4

THUT NG VIT TT.......................................................................................6

DANH MC HNH V...........................................................................................7

CHNG 1..............................................................................................................9

GII THIU V N V THC TP VNPT BC LIU.................................9

1.1 GII THIU.....................................................................................................9

1.2 C CU T CHC IU HNH CNG TY.............................................101.3 PHNG H TR K THUT.....................................................................11

CHNG 2............................................................................................................12

2.1 GII THIU TNG QUT...........................................................................122.2 V TRI CHC NNG CUA TNG I......................................................13

2.2.1 Vi tri.......................................................................................................132.2.2 Chc nng..............................................................................................13

2.3 YU CU K THUT CUA TNG I ...................................................132.4. NG DNG TNG I EWSD................................................................132.5 PHNG PHP B TRI TNG I..........................................................14

2.5.1 Phng u dy MDF..............................................................................152.5.2 Phng ngun..........................................................................................162.5.3 Phng truyn dn ..................................................................................162.5.4 Phng i...............................................................................................16

CHNG 3............................................................................................................17

3.1 S KHI TNG I EWSD.................................................................173.1.1 Khi truy nh p.......................................................................................173.1.2 Khi chuyn mch..................................................................................183.1.3 Khi iu phi ......................................................................................183.1.4 Khi bo hiu knh chung......................................................................18

3.2 N V GIAO TIP NG DY S DLU (DIGITAL LINE UNIT).....183.2.1 Gii thiu...............................................................................................183.2.2 S kt ni DLU.................................................................................193.2.3 S khi DLU.....................................................................................203.2.4 CACH B TRI CARD CUA TU DLU....................................................24

3.3 NHM NG DY TRUNG K LTG ( LINE TRUNK GROUP )........253.3.1 Gii Thiu..............................................................................................253.3.2 Chc nng ca LTG...............................................................................263.3.3 u ni vi mt s trng hp..............................................................273.3.4 Chc nng cc Module trong LTG........................................................283.3.5 Phn Loi LTG......................................................................................30

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3.4 MANG CHUYN MACH SWITCHING NETWORK (SN)........................313.4.1 Gii Thiu..............................................................................................313.4.2 Cu trc mng chuyn mch SN...........................................................33

3.5 B X L PHI HP CP (COORDINATION PROCESSOR)..................343.5.1 Gii thiu...............................................................................................343.5.2 Chc nng ca CP ................................................................................343.5.3 c tinh h thng CP113......................................................................35

3.6 B IU KHIN BO HIU KNH CHUNG CCNC: .............................363.6.1 Gii Thiu .............................................................................................363.6.2 B m bn tin MB (Message Buffer)....................................................373.6.3 Bng en cnh bo SYP (SYstem Panel)................................................37

LI CAM N........................................................................................................45

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THUT NG VIT TT

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DANH MC HNH V

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EWSD Electronic Switching System Digital H thng chuyn mch in ts

ISDN Integrated Services Digital Network

NGN Next Generation NetworkVOIP Voice Over Internet ProtocolIPTV Internet Protocol TVSPC Stored Program ControlMDF Main Distribution FrameDLU Digital line unit n vi ng dy sDLUC Control Unit for DLU n vi iu khin DLULTG Line Trunking Group Nhom ng dy trung kGP Group Processor Nhom x lSN Switching Network Mang chuyn mchSGC Switching Group Control n vi iu khin chuyn mch

nhmCCNC Common Chanel Signaling Network

Controln v iu khin mng bohiu knh chung

MB Message Buffer B m bn tinCCG Central Clock Generator ) B pht xung ng b trung

tmCP Coordination Processor B x l iu phiCCNC Common Chanel Signaling Network

Control

n v iu khin mng bo

hiu knh chungCCNP Common channel signaling networkprocessor

n v iu x l mng bohiu knh chung

PBX private branch exchange tng i nhnh ringPCM pulse-code modulation iu xung mSLMA Subscriber Line Module Analogue

EMSP Emergency Service Equipment forPush Button Subscriber

BD Bus Distributor B phn tuynCG Clock Distributor B cp xung ng hTU Test Unit n vi o thALEX External Alarm B cnh bo bn ngoiCAS Channel Associated Signaling Bao hiu knh lin ktGP Group Processor Nhom x lLIU Link Interface UnitDCR Digital Code Receiver B thu m sSSG Space Stage Group Tng khng gianTSG Time Stage Group Tng thi gianSGC Switching Group Control iu khin chuyn mch nhm


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KIN NHN XT CA N V HNG DN THC TP.......................2

LI NI U.........................................................................................................3

MC LC................................................................................................................4

THUT NG VIT TT.......................................................................................6

DANH MC HNH V...........................................................................................7

CHNG 1..............................................................................................................9

GII THIU V N V THC TP VNPT BC LIU.................................9

CHNG 2............................................................................................................12

CHNG 3............................................................................................................17

LI CAM N........................................................................................................45

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CHNG 1

GII THIU V N V THC TP VNPT BC LIU

1.1 GII THIU

Tnh Bc Liu c thnh lp ngy 01-01-1997, c din tch 2469km2 vi dn

s khong 87330 ngi, phn b trn 7 huyn, th x.

1. Th x Bc Liu.

2. Huyn Phc Long.

3. Huyn Hng Dn.

4. Huyn Vnh Li.5. Huyn ng Hi.

6. Huyn Ha Bnh.

7. Huyn Gi Rai.

Bu in tnh Bc Liu c thnh lp ngy 01-07-1997 phc v cho vic

truyn thng cho ngi dn trn a bn. Bu in tnh Bc Liu c u t,

nng cp xy dng c s h tng mi d dng qun l, p ng c nhu cu ca

khch hng.

Ngy 15-08-2007 theo ch trng ca Tng Cng ty tch Bu in Bc

Liu thnh Vin thng Bc Liu v Bu in Bc Liu.

c s u t ca Tng Cng Ty Bu Chnh Vin Thng trong vic xy

dng c s h tng:

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- Thay i cc tng i c c dung lng nh bng cc tng i mi c dung

lng ln.

- Xy dng trung tm giao dch hnh chnh Bu in tnh.- Pht trin mng cp ngm trong thnh ph.

- Xy dng mng cp si quang thay cho thit b viba s.

1.2 C CU T CHC IU HNH CNG TY

Hnh 1.1: S c cu t chc Vin thng Bc Liu

Gim c: iu hnh, qun l ton Cng ty.

Ph gim c ti chnh kinh doanh: Tr l cho gim c qun l v lnh vc

ti chnh kinh doanh.

Ph gim c pht trin ngoi vi: Tr l cho gim c qun l, u t v

pht trin mng ngoi vi.

Ph gim c k thut: Tr l cho gim c qun l, u t v k thut.

Phng h tr k thut: Qun l, vn hnh, khai thc x l mng vin thng,

tng i EWSD, mng bng rng

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Phng chm sc khch hng: Chm sc khch hng, gii p thng tin v

nghnh bu in, ng thi cng gii p v thng tin kinh t - x hi

Phng giao dch: Thc hin cc giao dch vi khch hng, t vn dch vCc phng dch v khc: Sa cha ng dy thu bao cho khch hng

Phng k ton - k hoch: Qun l vic thu chi ca cng ty, qun l danh

sch thu bao khch hng v pht trin thu bao khch hng

1.3 PHNG H TR K THUT

Hnh 1.2: S t chc iu hnh qun l

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CHNG 2

TNG QUAN TNG I EWSD

2.1 GII THIU TNG QUT

Tng i EWSD (Electronic Switching System Digital) l tng i in t sdo hng Siemens ca c sn xut c thng mi ha vo nm 1981. Tng i

EWSD cung cp nhiu gii php dch v trn nn tng cng ngh tin tin, mt h

thng chuyn mch in t s a nng trong mng thng tin cng cng. N p ng

tt c nhng nhu cu v thng tin hin nay v cc nhu cu v tng lai, vi cc c

im sau:

- C y phm cht ca mt tng i in t s SPC (Stored Program

Control).

- c thit k theo kiu Module ha c phn cng ln phn mm.

- c thit k linh ng d dng m rng dung lng

- c sn xut vi k thut cng ngh hin i, tch hp vi khng gian nh

gn v tin cy cao.

- Dch v phong ph a dng p ng mi nhu cu ca khch hng. D avo cc dch v cng thm nh Internet, ISDN.

EWSD m ra mt hng i mi cho cc nh cung cp dch v bng thng rng

ti Vit Nam l vic hi t, tch hp nhiu dch v trn nn tng mng li,

mng NGN l tin cho vic khai thc v pht trin cc dch v ny, ng thi

cng a ra nhng thch thc cho cc nh cung cp dch v trong vic nng cp h

thng mng truyn dn, m bo bng thng cho cc dch v tin tin nh VOIP,

IPTV.

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2.2 V TRI CHC NNG CA TNG I

2.2.1 V tr

Tng i c v tr rt quan trng trong mng vin thng na l trung tm x l

cc tn hiu gi n v gi tn hiu i. Nh c tng h thng i m cc cuc gi

c truyn mt cch chnh xc v tng i cn c nhim v bo hiu, x l thng

tin v tnh cc.

Tng i EWSD l 1 trong 3 b phn cu thnh nn mng vin thng, l trung

tm chuyn mch, iu khin lu lng, to ra cc tuyn ni cho cc thu bao khi

c yu cu. Tng i EWSD s dng m hnh kin trc phn cng v phn mm c

sn kt hp li to thnh dch v phong ph a dng p ng mi nhu cu ca

khch hng.

2.2.2 Chc nng

H thng tng i l trung tm x l v phn phi thng tin. V vy tng i

c mt s chc nng c bn sau:

- Nhn dng thu bao ch gi: xc nh khi thu bao nhc t hp v cuc

gi ni n mch iu khin.

- Tip nhn s c quay.

- Kt ni cuc gi.

2.3 YU CU K THUT CA TNG I

Khu vc b tr tng i phi c din tch rng lp t cc thit b.

Cc phng phi m bo h thng phng chy cha chy ti ch.

H thng lm lnh trong phng phi m bo c nhit lm vic n nh

ca thit b.

2.4. NG DNG TNG I EWSD

Tng i ni ht:Tng i EWSD c th lm tng i ni ht phc v nhng

cuc lin lc trong phm vi ni b mt vng. Dung lng mt tng i ni ht c

th ln n 250.000 s.

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Tng i chuyn tip: Tnh linh hot ca tng i EWSD cho php n c

s dng nh tng i ni ht v chuyn tip ng di kt hp. Khi c s dng

lm tng i chuyn tip n c th chuyn tip cho cc cuc gi vi kh nng ti a

l 60.000 trung k gi i, gi n, v trung k hai chiu.

Tng i ca ng quc t:Tng i EWSD p ng y chc nng ca

mt tng i ca ng quc t:h thng bo hiu quc t, c kh nng trit ting di

do cc ng truyn xa dng v tinh, thng k tnh ton v x l cc thng tin cc

ci mng quc t.

Trung tm chuyn mch di ng: Tng i EWSD c kh nng chuyn mch

cho cc thu bao in thoi v tuyn di ng. Kh nng ti a ca mt trung tm

chuyn mch di ng EWSD l 65.000 thu bao di ng.

Tng i nng thn/container: Cung cp cho nhng vng nng thn xa vi

mt dn s thp. Dung lng ti a 75.000 s. Phn cng v phn mm nh tng

i ni ht. L mt h thng hon chnh vi ngun v my iu ha khng kh c

th lp t trong mt Container vi dung lng ti a 6.000 thu bao.

2.5 PHNG PHP B TRI TNG I

Khu vc hnh chnh ca tnh Bc Liu c chia thnh 7 huyn, th x nn

tng i phi c xy dng v b tr sao cho hp l m bo phc v c nhu

cu ca ngi dn. Cc b t p trung thu bao c t cc huyn, cc b t p

trung thu bao ny c nhim v t p trung tt c cc thit b u cui trong 1 huyn

thng qua mng ngoi vi cp kim loi trc khi c a v tng i trung tm

thng qua h thng truyn dn.

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Hnh 2.1: S b tri tng i

Hnh 2.2: B tri phng

2.5.1 Phng u dy MDF

L phng t p trung cc u dy thu bao bn ngoi i i vo i trc khi

chng c kt ni vo tng i.

u ni MDF: n v u ni gm 2 thnh phn:

- u ni Inside Block c u vi tng i bng cp sc.

- u ni Outside Block : c cu ch bo v v dng cp trn.

Gia Inside Block v Outside Block c u vi nhau bng dy nhy.

Hnh 23: S u ni MDF

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2.5.2 Phng ngun

m bo cc tiu chun k thut c th cung cp ngun n nh cho

h thng hot ng.

H thng bnh acquy m bo duy tr cho h thng hot ng ln n 6h

ng h khi g p cc s c v ngun nh mt in.

in li xoay chiu c lu tr trong cc bnh acquy sau c i

li thnh dng xoay chiu cung cp ngun cho h thng my tnh ca ngi vn

hnh.

H thng in li v in acquy lun c u song song vo h thng

thng qua b x l. Bnh thng h thng hot ng s ly ngun t h thng in

li nhng nu xy ra s c nh mt in, th in trong bnh s c ly ra ngay

tc khc m h thng vn hot ng bnh thng.

2.5.3 Phng truyn dn

Phng truyn dn cha cc thit b cho truyn dn (truyn dn quang) OSN

3500, OSN 2500, OSN 1500.

V khng th u ni trc tip cc thu bao xa i nn h thng tng i ni

ht gm nhiu cc tng i v tinh, cc DLU t xa t p trung thu bao theo tng

khu vc trc khi c a v tng i nn mun chuyn lu lng t tng i v

tinh hay DLU t xa ny phi thng qua h thng truyn dn bng cp quang hay

viba. Tn hiu ti cc DLU t xa s c bin i c th truyn i c trn h

thng truyn dn nn trc khi i vo trong i chng phi c bin i ngc li

thnh tn hiu nh ban u.

2.5.4 Phng i

y l khu vc trung tm ca h thng tng i n cha cc thit b c th

chuyn mch to tuyn kt ni, gm cc t thit b DLU, LTG, CP

Khu vc gim st iu hnh ca ngi qun tr bao gm my tnh, mn hnh

hin th cho qu trnh gim st vn hnh.

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CHNG 3

PHN CNG TNG I EWSD

3.1 S KHI TNG I EWSD

Hnh 3.1: S khi tng iTrong :

3.1.1 Khi truy nhp

Khi ny gm 2 b phn chnh l DLU (Digital line unit) v LTG (Link trunk

group).

DLU ( Digital Line Unit) n v ng dy s.

DLUC (Control Unit for DLU ) n v iu khin DLU.

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LTG ( Line Trunking Group ) Nhm ng dy trung k.

GP ( Group Processor) nhm x l.

3.1.2 Khi chuyn mch

SN (Switching Network) mng chuyn mch.

SGC (Switching Group Control) n v iu khin chuyn mch nhm.

3.1.3 Khi iu phi

CCNC ( Common Chanel Signaling Network Control ) n v iu khin

mng bo hiu knh chung

MB (Message Buffer): B m bn tin.

CCG (Central Clock Generator ): B pht xung ng b trung tm.

CP (Coordination Processor): B x l iu phi.

3.1.4 Khi bao hiu knh chung

CCNC (Common Chanel Signaling Network Control): n v iu khin

mng bo hiu knh chung.

CCNP (Common channel signaling network processor): n v iu x

l mng bo hiu knh chung.

3.2 N V GIAO TIP NG DY S DLU (DIGITAL LINE UNIT)

3.2.1 Gii thiu

Trong h thng tng i EWSD, DLU l n v ng dy s m cc

ng dy thu bao v PBX c ni n. Vi tnh nng kt ni linh hot tin

cy cao v thit k theo khi nn DLU lm vic rt c hiu qu. DLU c th t ti

i ( local DLU ) hoc i v tinh ( remote DLU ). DLU v tinh phc v nhm

thu bao trong mt khu vc, c u im l rt ngn ng dy thu bao v d dng

tp trung lu lng thoi n tng i bng ng truyn s s cp PDC lm tng

hiu qu kinh t.

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ng dy thu bao analog c th dng cho cc thu bao quay s bng xung

n phm, c th c b tnh cc ph dng xung xa 16K hoc 12K cho thu bao

cng cng.

Nhng my dng i dy thng : in thoi cng cng, tng i ni b PBX

analog, tng i ni b c nh v trung bnh.

DLU ni n LTGB, LTGF hoc LTGG bng 2 hoc 4 ng truyn s cp

PCM30 ( PCM24 ), i vi DLU trong i c th kt ni n LTGF, LTGG bng 1

hoc 2 ng 4Mbit/s.

Bo hiu gia DLU v LTG l bo hiu knh chung.Kh nng lu thai ti a 100 Erlang.

Thnh phn thit b trong cc DLU u ging nhau.

Cc RDLU (Remote DLU) c lp t xa tng i chnh lm gim chiu

di ng dy thu bao v tp trung lu lng thoi trn ng truyn dn s

ni n tng i chnh. ng thi, nng cao cht lng truyn dn v gim gi

thnh mng.

3.2.2 S kt ni DLU

Hnh 3.2: Kt ni DLU

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3.2.3 S khi DLU

3.2.3.1 Card ng dy thu bao tng t SLMA (Subscriber Line Module)

Card ng dy c 2 loi cho 2 loi u cui s v u cui tng t

Card ng dy thu bao tng t SLMA (Subscriber Line Module Analogue)dng kt ni thu bao tng t. Ty vo loi card m c th c 4, 6 hoc 8 mchng dy thu bao tng t SLMA (Subscriber Line Module Analogue), card G cth cha 32 mch ng dy thu bao

B iu khin SLMCP (SLM Control Processor ) s iu khin tt c cc mchng dy thu bao.

SLMA c cc chc nng sau:

- Cp ngun.

- Gi tn hiu chung.

- Nhn xung quay s.

- Bo v chng qu p.

- Giao tip vi lung 4096 kbit/s.- M ha v gii m tn hiu thai.

- Ngn cch dng DC vi tn hiu thoi.

- Chuyn tn hiu DTMF nhn t thu bao.

- Pht hin tnh trng thu bao, rung chung cp xung tnh cc.

- o th kt ni gia ng dy thu bao v mch ng dy thu bao.

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- M ha/gii m tn hiu thoi, bin i 2 dy thnh 4 dy, giao tip mngiu khin v mng 4Mbit/s.

Hnh 3.4 : Card thu bao tng t SLMA

3.2.3.2 Card ng dy thu bao s SLMD (Subscriber Line Module Digital)

kt ni ng dy thu bao s. Mi card SLMD gm 8 hoc 16 mch ngdy thu bao s SLCD (subscriber line circuit digital). Mi mch ng dy thu

bao ny c kt ni n u cui s, c iu khin bi b x l.Thng qua NT ( Network Terminal ) mi SLCD cung cp mt ng truyn c

s (2B + D) cho cc thit b u cui ISDN. D liu truyn gia NT v SLCDbng cp i xng c tc 160 Kbit/s trong 144 Kbit/s l tin tc ngi dng v16 Kbit/s dng cho ng b,gim st v chun on.

Cc chc nng ca SLMD:

- Trit ting di.

- Bin i 2 dy thnh 4 dy.- Truyn bo hiu trn knh D.

- Bin i tt c cc m thng tin khc thnh m nh phn v ngc li.

- Sp xp cc thng tin n t thu bao thng qua knh B1 v B2 thnhcc khe thi gian cho lung 4096 Kbit/s.

- Sp xp cc thng tin nhn t cc khe thi gian ca lung 4096 Kbit/scho cc knh B1 v B2.

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SLMA

SLMA7

SLMA 0

SLMCPng o th

Mng 4Mbit/s 1

Mng k 0

Mng k 1

Mng 4Mbit/s 0

ng thu bao

ng thu bao


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- Giao tip ng dy thu bao (ngun nui mch ng dy thu bao l60v, c th m rng 93v hoc 97v khi c yu cu o th, b o th s o vic ktni gia mch ng dy thu bao v ng dy thu bao bng ma trn o th ).

Hnh 3.5: Card thu bao s SLMD

3.2.3.2 n v trung tm (Cantrel Unit)

e tang o tin cay n v trung tam gom 2 DLUS ( DLUsystem 0 va DLU system 1 ). Ca 2 DLUS c at trong cung1 shelf, DLU system 0 t bn tri shelf 0 va DLU system 1 at

bn phi shelf0.

Moi he thong DLU gom cac n v chc nang sau:

- DLUC (Control Unit for DLU): n v ieu khien DLU.

- DIUD ( Digital interface unit for DLU ): n v giao tiep

so cua DLU.

- CG ( clock generator ): Bo cap xung ong ho.

- 2 khoi phan tuyen BD (Bus distributor ).

3.2.3.3 n v iu khin lung DLUC (Control Unit for DLU)

DLUC qun l s tun t thi hnh cc chc nng bn trong DLU, n cn phnphi v tp trung bo hiu gia mch ng dy thu bao v DLUC. DLUC qun lvic o th v gim st nh k trong DLU. Mng iu khin bn trong DLU ni

DLU vi tt c cc khi chc nng khc. Tt c cc chng trnh iu khin cckhi chc nng u c np vo cc vi x l thch hp.

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SLMD

SLMD 7

SLMD 0

iu khinLCPSAPng o th

Mng 4Mbit/s 1

Mng k 0

Mng k 1

Mng 4Mbit/s 0

ng thu bao sss

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V l do an ton v tng s liu ng truyn, mi DLU gm c 2 DLUC lmvic c lp theo ch chia ti, nu 1 DLUC b h th DLUC cn li s m nhntt c cc cng vic.

3.2.3.4 n v giao tip DIUD (Digital Interface Unit for DLU )DIUD l n v giao tip gia DLU v LTG thng qua 2 ng truyn s cp

PDC (PCM30 hoc PCM24)

DIUD ly tn hiu iu khin t TS16 ca ng truyn PDC t LTG vchuyn tn hiu ny n DLUC tng ng. Ngc li, DIUD ghp tn hiu iukhin t DLUC vo TS16 ca ng truyn PDC v truyn n LTG. DIUD kt nin n v bn trong DLU bng mng 4Mb/s. DIUD ly tn hiu ng b t TS0ca ng PDC.

3.2.3.5 Phn tuyn BD (Bus Distributor)

Phuc hoi bao hieu, phan phoi bao hieu enthiet b ngoai vi hoac tap trung bao hieu t thiet bngoai vi a en.

3.2.3.6 B cp xung ng h CG (Clock Distributor)

B cung cp xung ng h CG cung cp cho DLU xung ng h 4096 Khz. Vl do an ton nn c 2 b cp xung lm vic theo nguyn tc ch t (Master - Slave).Bnh thng b Master cung cp xung ng h cho c hai h thng DLU, b Slave ch d phng. B cp xung ng h nhn tn hiu ng h t DIUD, tn hiuny c ly trn TS0 ca ng PDC tng ng.

3.2.3.7MTA (Metallic test Access)

La khoi dung e au vi thiet b o th ben ngoai.

3.2.3.8 EMSP ( Emergency Service Equipment for Push Button Subscriber)

Trong trng hp khn cp khi ng PDC gia DLU v LTG b t th EMSPs tgucwj hin vic kt ni gia cc thu bao trong cng 1 DLU, dch v ny c cc

c im sau:- Ch cho php cng lc c 60 cuc gi trong cng DLU .

- Khng tnh cc.

- Khng c s dng cc dch v thu bao.

3.2.3.9 SASC (Stand Alone Service Control)

Khi cc DLU trong b tp trung RCU th cn phi trang b khi ny, v trongtruongwg hp khn cp vn c th iu khin kt ni thu bao trong cng 1 RCU.

3.2.3.10 n v o th TU (Test Unit)

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Thc hin chc nng o th ng dy thu bao v mch ng dy thu baobng nhn cng hoc t ng nh k.

3.2.3.11 B cnh bo bn ngoi ALEX (External Alarm)

Nhng cnh bo bn ngoi khng thuc h thng nh nhit , bo chyCth c 16 cnh bo khc nhau c s dng.

3.2.3.12 B bin i in p DCC

Trong DLU, c na ngn th c 1 khi ngun DCC cung cp, s phn b ngunnh vy rt thun tin. in p u ra cc DCC u c phn bo v ngn mch.

Nu khi DCC no b h th h thng DLU tng ng s ngng hot ng, inp cung cp cho cc DCC trong DLU u phi qua h thng cu ch.

3.2.3.13 RGMG - Ringing Generator Metering GeneratorDng iu khin pht ra dng chung v xung in p cho ng h cc.

Cc b phn tuyn BD nhn dng rung chung v in p cho ng h o xung tnhcc t 1 trong 2 b RGMG. 2 b RGMG lm vic theo ch chia ti. Khi mtdng rung chung b phn tuyn BD c th pht hin c. RGMG0 cp dng rungchung v in p cho ng h o xung tnh cc cho khi ng dy thu bao na ngn tri SLM0 n SLM7 thng qua b phn tuyn BD trn Bus system 0 vRGMG1 chu trch nhim na ngn bn phi SLM8 n SLM15 thng qua b

phn tuyn BD trn Bus system 1.

3.2.3.14 Mng 4096 Kbit/s

Mng 4096Kbit/ss 0 v 1 ln lt c kt ni n cc cng giao tip caDIUD0 v DIUD1 tng ng. Mi mng 4Mbit/s c 64 knh, tc mi knh l64Kbit/s v truyn 2 hng. Nhim v ca mi mng l chuyn tin tc ca thu baot khi ng dy thu bao SLM n DIUD v ngc li.

3.2.4 CCH B TRI CARD CUA TU DLU

Trong DLU cc khi chc nng c thit k c lp nn vic sp xp theo

tng ngn (shelf ) rt thun tin, vic b tr cc khi trong DLU nh sau: mi khichc nng chim mt hc t 0 15, 15 khi ny to thnh 1 shelf v 2 shelf tothnh Module Frame ( c khi 1 shelf to thnh 1 frame nhng ch i vi Moduleloi C ) c m phng di cc hnh:

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DCC

0-0

SLM

0

SLM

1

SLM

2

SLM

3

SLM

4

SLM

5

SLM

6

SLM

7

DBE

0

DBE

1

SLM

8

SLM

9

SLM

10

SLM

11

SLM

12

SLM

13

SLM

14

SLM

15

DCC

0-1

Hnh 3.6: B tri card trong t DLU

3.3 NHM NG DY TRUNG K LTG ( LINE TRUNK GROUP )

3.3.1 Gii Thiu

LTG l khi ngoi vi ca CP lm trung gian u ni gia DLU v SN ng thiLTG cng dng kt ni vi tng i khc.

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3.3.2 Chc nng ca LTG

Chc nng x l cuc gi:

- Nhn v nh gi cc thng tin t trung k v ng dy thu bao .

- Gi bo hiu v m hiu.

- Nhn v gi cc bn tin n CP v cc b x l nhm GP.

- To iu kin ph hp vi ng dy 8 Mbit/s ca mng chuyn mch.

Chc nng bo an :

- D tm li trong LTG.

- D tm li cc ng giao tip bn trong tng i cho qu trnh x l cucgi.

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SN1

Z ZSN0

Z Z

1

1

n

n

SDCSDC

SDC

SDCSDC

1SDC

CP

MB1MB0

IOPIOP

LTG1

LIU

GP

XX

XX

SDCSDC

LTG1

LIU

GP

YY

XX

A -Side

B- Side

:

Hnh 3.7 : Kt ni LTG.


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- Thng bo li v chn ng cho cc bn tin n CP.

- nh gi tnh trng li.

Chc nng iu hnh :

- Thng bo d liu v lu thoi cho CP.

- Thit lp v o th cc kt ni .

- Hin th cc trng thi hot ng cho cc Module thng qua cc LED .

- Tham gia vo vic ghi nhn cc cuc gi .

3.3.3 u ni vi mt s trng hp

u ni vi DLU ni i bng lung PDC 4 Mbit/s.

u ni DLU xa bng lung PDC 2 Mbit/s.

u ni vi SN bng lung SDC 8 Mbit/s.

Nhm ng dy v trung k LTG l giao tip gia mng chuyn mch s SNv h chuyn mch khu vc (PCM 30, PCM 24, trung k s, n v DLU).

Kt ni gia LTG v mng chuyn mch SN c thc hin bi ng truynsng mang s th cp (SDC). Tc truyn dn t LTG n SN l 8192 Kbit/s.nhng h thng ghp knh 8Mbps c 127 khe thi gian mi khe c 64 Kbps cho

thng tin hu ch v c 1 khe 64 Kbps dnh cho cc tin nhn.LTG lun truyn, nhn thng tin thoi t c 2 mt ca mng chuyn mch SN0,

SN1.

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Hnh 3.8 : S khi LTG

3.3.4 Chc nng cc Module trong LTG

LTG hay DLU c xem nh l giao tip gia mi trng xung quanh tng i

( gm c mi trng tng t hay s) v trung tm chuyn mch s. Cc LTG mng trch nhim cho cc cng vic iu khin c tnh khng tp trung. V vy, nlm gim bt gnh nng v cng vic nh tuyn ca b x l phi hp.

LTU - Line Trunk Unit

LTU c nhim v lm cho thch ng cc ng dy kt ni n cc giaotipbn trong ca LTG. LTU c trang b cho mch ng dy thu bao tng t.

TC Trunk Circuit

Cho cc tng i PBX tng t, hoc vi cc n v giao tips (DIU) choPDC. Khi kt ni vi cc ng dy thu bao tng t, mt LTU c th kt ni 32

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LTU

DIU

DIU

Special

module

GS

Signal unitCR/ TOG

LIU

SPH

SPH

SPH

SPH

SIH

SIH

SIH

GP

8Mbps


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mch thu bao tng t. Khi kt ni vi cc ng dy ghp knh PCM30 thDIU30 c dng trong LTU.

- DIU30 lm thch ng cc khung PCM30 nhn t bn ngoi vi cc

khung- PCM30 bn trong LTG v cc gim st vic truyn tin tc tc ng ln

m HDB3 trn tuyn truyn dn.

1. SU Signaling Unit

SU bao gm b pht m hiu ( TOG ) v cc b thu m CR (Code Receiver).

2. TOG - Tone Generator

TOG cung cp cc m hiu x l cuc gi v cc tn s cn thit cho quay s

DTMF hoc bo hiu m a tn.3. CR-Code Receiver:

L b thu m ca thu bao quay bng my n phm v bo hiu a tn catrung k c phng php bo hiu lin kt CAS.

4. Nhom chuyn mch GS (Group Switch)

nh dng cho cuc gi nhm.

Chuyn mch nhng knh thoi ring r gia PDC v SDC.

Kt ni li m hiu quay s, nhn m n cc knh c dng ca PDC.

Lin kt n LTU c thc hin bi cc ng truyn thoi cao tc SPH(Speech Highways), v lin kt n SN (Switching Network) bi LIU.

5. GP-Group Processor

GP c tc dng nh mt n v iu khin ngoi vi c lp gia LTG v CP.Nhim v chnh ca GP l chuyn i cc thng tin n t mi trng xung quanhtng i thnh cc thng tin bn trong theo nh dng ca h thng . GP iu khin

tt c cc n v chc nng trong LTG.GP trc tip iu khin cc b phn sau :

- B ghp knh thoi- B m tn hiu- n v b nh x l- iu khin ng d liu- B pht ng h nhm- iu khin ng bo hiu SILC

n v chc nng PU v SIB nm trong Module PU/SIB. n v chc nngDLC, GCG v WDU nm trong Module GCG:LTG.

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6. LIU - Link Interface Unit

LIU l giao tip gia LTG v SN dng chuyn tip ng SPHO/IL 8192Mbit/s t GS/SPMX n 2 ng song song n 2 mng SN. Nu mt SN ang lm

vic b s c th LIU vn tip tc truyn tin tc thng qua SN cn li.LIU ng b tin tc ly t SN vi xung ng h t LTG.

Mt tn hiu dng ng b vi b pht xung ng h ly ra t xung ng hh thng n SN trong LIU. LIU dng chc nng COC (Cross Office Check) kim tra kt ni sau mi ln thit lp kt ni c thc hin. LIU ca pha thu baoch gi gi i 1 kim tra th t bit v c LIU ch n gi tr li. Nu cc tht bit gi i hp vi th t bit nhn th cuc gi c kt ni n thu bao.

3.3.5 Phn Loi LTGLTGB:

- Kt ni gia DLU v LTGB c ti a l 4 lung PDC.

- Khi kt ni DLU n LTGB bng mt hay hai lung PDC th knh bohiu l knh 16 ca PDC0 v PDC2.

- Khi kt ni DLU n LTGB bng 4 lung PDC th knh bo hiu l knh 16ca PDC0 v PDC2, knh 16 ca PDC1 v PDC3 khng dng.

LTGC: LTGC cng c 4 lung PDC khi kt ni vi DLU, cc kt ni ca LTGC:- H thng ghp knh PCM30 vi bo hiu lin kt (CAS Channel

Associated Signaling), MFC : R2.

- H thng ghp knh PCM30 vi bo hiu knh (CCS7 CommonChannel Signaling Number 7).

LTGD: LTGD dng kt ni tng i quc t. C 4 lung PDC ( PCM30 ) c thkt ni n LTGD.

- H thng ghp knh PCM30 c phng php bo hiu lin kt (CAS).

- S dng bo hiu m a tn ( MFC ) cho cc trung k s.

- C b iu khin nn ting di.

Cc module trong LTGD:

- C ti a 4 DIU30 ( bao gm 1 trong 2 Module ).

- B ghp knh thoi SPMX.

- B ghp knh s cp 2 loi A( SDMASecondary Digital MultiplexerModule A )

- B pht m hiu TOG.

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- B thu m dng s (DCR Digital Code Receiver).

- B x l nhm GP.

LTGF: c dng nh LTGC hay LTGB tu vo b tr s lng Module trong

LTGFLTGG : c dng nh LTGC hay LTGB tu vo b tr s lng Module trongLTGG.

LTGM: c dng nh LTG c chc nng B hay C nhng c tch hp ccModule li cn 3 khi l LTU, GSM, GPL.

LTGN: c dng nh LTG c chc nng B hay C nhng c tch hp ccModule cn li thnh 1 Module.

3.4 MANG CHUYN MACH SWITCHING NETWORK (SN)3.4.1 Gii Thiu

Trong tng i EWSD th SN nm v tr trung gian v c u ni vi tt ccc khi chc nng khc nh: CP, CCNC, LTG. Cc kt ni bn trong mng chuynmch c tc l 8192 Kbit/s SDC (Secondary Digital Carrier), mi ng c 128knh, mi knh c tc l 64Kbit/s. Mng chuyn mch ca EWSD gm cc tngchuyn mch thi gian v khng gian. SNkhng cn np phn mm, mi hot ngkt ni c nh vo khi iu khin CP v chng trnh c thc hin di s

iu khin ca CP v chng trnh th nm trong EFROM.

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Hnh3.9:Giao tip cc khi vi SN bn trong i

Mng chuyn mch to nhng kt ni knh ngi dng gia LTG.

Trao i bn tin trong mng chuyn mch gia cc b iu khin ca LTG,CCNC, SSNC v CP thng qua cc knh bn tin c nh MCH.

Mng chuyn mch c lp t song song (SN 0, SN 1) tt c cc cucgi u c kt ni qua 2 b SN, ngc li LTG ch kt ni n thng tin knh

ngi dng t b SN ang hoat ng nh tuyn PCM. Nu SN hot ng b lith SN d phng s c thay th ngay.

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SN0 V SN1LTG

LTG

CCNC

SSNC

CP

MB


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3.4.2 Cu trc mng chuyn mch SN

SN bao gm 2 tng chuyn mch khng gian SSG (Space Stage Group) v thigian TSG (Time Stage Group).

Giao tip gia SN vi bn ngoi theo cc lung SDC tc 8192 Kbit/s tngng vi 128 knh, knh s 0 truyn tn hiu trong i cc knh cn li dng truyn d liu cho thu bao vi tc mi knh l 64 Kbit/s.

3.4.2.1 Tng thi gian TSG

Mi tng thi gian c phc v kt ni gia SDC vi LTG, CCNC, MB.Mi SN c ti a 8 TSG.

SGC (Switching Group Control) l n v iu khin chuyn mch nhm trongmi TSG iu khin kt ni n CP trn ng SDC thng qua b m bn tin MB(Message Buffer). SGC nhn s cung cp ang c thit l p cho cc ng tmthi 64kbps xuyn qua kt ni t CP. Mi mt TSM c th c thay i v tr trongthi gian v khng gian ca bt k khe thi gian cho mt nhm 8 ng kt niSDC trong mt TSG.

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SSG0-0

SSG0-3

TSG0-0

TSG0-7

TSM

SGC

SSM

SGC

SGC

TSM

SSM

LTG

CCNC

MB

CP


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Hnh 3.10: S khi cc tng chuyn mch

Cc ng SDC l ng giao tip ni SN vi cc khi LTG, khe thi gian 0dnh cho vic trao i bn tin gia LTG v CP

ng giao tip gia SN v MB chuyn tip knh bn tin cho tt c LTGca TSG n CP.

3.4.2.2 Tng khng gian SSG

C nhim v kt ni cho cc cuc gi gia cc module TSM trong vi TSGkhc nhau.

B iu khin chuyn mch nhm SGC trong SSG c kt ni n CP quaMB.

Phn loi mng chuyn mch: cn c vo dung lng lp t ca tng i mngi ta thit k mng chuyn mch vi:

- SN(B): 504 LTG: kt ni c 504 LTG.




3.5 B X L PHI HP CP (COORDINATION PROCESSOR)

3.5.1 Gii thiu

Trong h thng tng i EWSD c nhiu h thng ph c lp rng ln, mttrong cc h thng l b iu khin x l ca n, nh n v iu khin ngdy s DLUC trong DLU, cc b x l nhm GP. S kt hp ca cc b iu khin

phn phi nh : chuyn s liu vi nhau c x l bi b iu khin kt hp CP.

3.5.2 Chc nng ca CP

X l cuc gi :

- Dch s.- To ng dn.- Phn vng.- Chn ng qua mng chuyn mch.- Ghi cc cuc gi.- Qun l mng li.

Vn hnh v bo dng

- Xut nhp t b nh ngoi.- Lin lc vi s vn hnh v bo dng bn ngoi (OMT Operation

Mainternace Terminal).

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- Lin lc vi b x l s liu thng tin (DCP).

Bo an:

- H thng t kim tra li ca mnh.

- T xc nh v tr li.- T sa li.

3.5.3 c tnh h thng CP113

ng dng ca mt h thng a x l vi nhim v phi hp chia ti .

Kh nng thch ng ti cc dung lng tng i khc.

S dng vi x l c kh x l nhanh (vi 32 bit/ a ch).

Hnh 3.11: Cu trc b x l CP1133.5.3.1 B xl c sBAP (BAse Processors)

Trong b x l c s ny c 2 khi hot ng theo c ch ch t, (BAPM baseprocessors master, BAPS base processors salve). Trong hot ng bnh thngBAPM s x l tt c cc chc nng iu hnh bo dng v chia s mt phnchc nng x l cuc gi. Khi BAPM b li th BAPS s m nhn vai tr thay th.

3.5.3.2 B x l cuc goi CAP (CAll Processors)

CAP ch gii quyt nhng cng vic lin quan n x l cuc gi. N hnh

thnh mt vng chung vi BAPS v lm vic theo nguyn l chia ti.

Trang 35

AMPC0 AMPC1

CAP9

CMY1

CAP0

CMY0

BAPM BAPS

IOC3IOC2

IOP

IOC1IOC0

IOP

IOP

IOP

0

15 15

0


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3.5.3.3 iu khin nhp xut IOC (Input output Control)

Mi IOC cung cp mt ng giao tip chung ti Buss CMY cho ti a 12 b 12 b x l nh p xut qua Bus IOC. IOC v IOP kt ni n thit b thng tin qun

l hoc qun l d liu ( nh thit b nh p, thit b lu tr) v ngoi vi nhng n vh thng EWSD (nh LTG/SN qua b m bn tin).

3.5.3.4 B nh chung CMY (Common MemorY)

Bao gm 2 CMY lun hot ng ng thi cng lc. Tt c cc chu k ghi, clun c x l trong c 2 CMY. Tt c cc trng trnh v d liu u lin quann hot ng ca cc b x l trong CP c lu tr trong CMY.

3.5.3.5 Bus b nh chung B

CMY mi BAP, CAP, IOC v CMY c kt ni n c 2 Bus h thng chungB: CMY. Bnh thng cc a ch v d liu gia b x l v CMY c truyn khithc hin nhim v chu k c hoc ghi qua B:CMY0 ti CMY0 v qua B:CMY1n CMY1 trong trng hp b li (B:CMY0 hoc CMY1) th cc b x l c thx l thng tin vi CMY0 qua B:CMY1.

3.5.3.6 B x l nhp xut ( Input Output Processors )

C nhiu loi, dng kt ni CP vi cc ngoi vi x l cuc gi (IOP:MB),cc ngoi vi iu hnh bo dng .

3.6 B IU KHIN BO HIU KNH CHUNG CCNC:3.6.1 Gii Thiu

CCNC (Common Channel Signaling Network Control) c kh nng x l ti a254 knh bo hiu, vi tc 64 Kbit/s, v cc tuyn bo hiu ny c ni nLTG thng qua kt ni bn thng trc trong b SN v c gi ra trung k PCM.

Ngoi ra c th s dng 2 ng truyn Analog kt ni qua CCNC thng quamodem.

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Nhim v chnh ca bo hiu knh chung l trao i cc gi d liu gia cctng i.

Hnh 3.12: S khi mng bo hiu knh chung

3.6.2 B m bn tin MB (Message Buffer)3.6.2.1 MBU:LTG (Message Buffer Unit For Line Truck Group )

MBU:LTG c ti a 4 Module iu khin thu pht T/RC v mt b phn phibn tin MDM. Mi b T/RC phc v ti a cho 16 LTG. V vy mt MUB:LTGcho php mt tng i c m rng 16 LTG ti a 4 b T/RC ca MUB ckt ni bn trong bi MDM, MDM phn phi bn tin vo t IOP:MBU n ModuleT/RC thch ng v tp hp cc bn tin t T/RC Module bi LTG v chuyn cc bntin ny n IOP.

3.6.2.2 MBU:SGC ( Message Buffer Unit For Switch Group Control )

MBU:SGC c kt hp trong mt Module vi thch ng giao tip(Interfaceud) ti IOP:MB. Cu trc ca n c bn cng ging nh MBU:LTG biv MBU:SGC ch phc v ti a 3 knh ( iu khin bn tin, thng tin v bo nhnACK) c trao i vi IOP:MB ngang qua FIFO vo v ra.

3.6.3 Bng n cnh bo SYP (SYstem Panel)

Bng n cho ta nhn tng quan, lin tc trng thi hot ng ca h thng i

EWSD. SYP hin th b li bng phng thc nghe, nhn. Ngoi ra n cn cho bit:

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- Lng ti x l ca CP.

- Gi v ngy thng.

Mt trc ca bng n gm: cc n LED 7 on, n LED v nt n. Mthin th ca bng n chia thnh cc khu vc sau:

- LTG

- SN

- CP va CCNC

Hin th mc ti x l trn SYP l thc o mc ti lu lng trong h thngi EWSD. SYP hin th cc loi bng bo sau:

- Mc cnh bo nng: cp n LED chp nhanh vi ci cnh bo lin tc,khi tip nhn cnh bo ( nhn nt Accept ) hai n LED vn chp qua linhng chm hn v ci cnh bo b ngt.

- Mc cnh bo va: n LED tng ng chp nhanh km ting ci cnhbo ngt qung, khi tip nhn cnh bo va n LED tng ng chpchm v khng cn ting ci cnh bo.

- Mc cnh bo thng thng: n LED tip tc sng, LED phi sng uvi ting ci nh v lin tc.

CHNG 4

PHN MM TNG I EWSD

Cu trc

Hu ht cc phn mm ca EWSD u c np vo, ch c mt vi b x lc s lng chc nng hn ch v c lp vi cch ng dng ( nh b SGC vMB ) lu tr cc chng trnh c nh trong b nh ROM. Phn mm c th cnp ca tng i to nn h thng chng trnh ng dng APS.

V l do an ton bao gi cng c mt h thng chng trnh ng dng gingnh h thng chng trnh ng dng ang dng, cha b nh ngoi ca mi tngi EWSD.

Phn cng lun thay i theo pht trin ca cng ngh. Do phn mm catng i EWSD c thit k sao cho t l thuc vo phn cng. Theo cch iukhin phn b bn trong tng i EWSD, mi b x l bn trong h thng gm mt

phn mm ring. Phn mm c chia lm hai phn:

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Phn mm l thuc vo ngi s dng: lun cha h iu hnh c t chctheo ng chc nng phn h ca phn cng.

Phn mm khng l thuc vo ngi s dng ( phn mm ngi dng). Thc

hin cc chc nng ng dng khc nhau. H iu hnh cung cp tt c nhngchng trnh cn cho phn mm ca ngi s dng.

1. Cac lp phn mm ca h thng

Hnh 4.1: Cc lp phn mm ca b vi x l2. Cu trc phn mm ca b x l iu phi

Hnh 4.2: Cu trc phn mm ca b x l iu phi

Phn mm ca tng b x l chia nhiu chc nng khc nhau. Chc nngc chia lm nhiu phn h. Mi phn h cha mt s Modul, y l n v nhnht cho s bin dch.

Mt thnh phn quan trng ca pn mm EWSD l nhiu loi hnh d liu cth phn loi ty theo phm vi hot ng, thi gian tn ti, v tr lu tr ca b xl iu phi CP. Phm vi v ni dung ca d liu ty thuc vo thit b v mngkhu v xung quanh tng i.

Trang 39

Phn mm ca CP

H iu hnh Phn mm ngi dng

Cc chng trnh x l

Cc chng trnh qun l

Cc chng trnh bo tr

C s d liu

Cc chng trnh iukhin

Cc chng trnh bo an

Phn mm ca ngi dng

H iu hnh

Phn cng


39/45


Chng trnh x l cuc gi iu khin vic kt ni, cc chng trnh phic nhng thng tin v c im ca thit b u cui v khu vc mng xung quanh.Dng lnh MML a thng tin vo h thng. Cc lnh ny c kim sot bngchng trnh qun l. Cc chng trnh x l cuc gi cung cp d liu v tnhcc v d liu v lu thoi.

Cc chng trnh bo an v bo dng m bo cho h thng hot ng tt.Chng trnh bo an l mt phn ca h iu hnh, c thc hin mt cch tng. Ngc li chng trnh bo dng ging nh chng trnh qun l v x lcuc gi, n l nhng chng trnh ca ngi s dng. Mt s chng trnh ny shot ng sau khi lnh MML thch hp a vo.

a) H iu hnh:Mi b x l trong EWSD c h trng dnh ring, dung lng ph thuc vo

b x l m n m trch v thit b v phn cng nh b nh, thit b ngoi vim n qun l. Tt c cc h iu hnh phi thc hin cng vic ca mnh theo thigian thc. Chng lm vic theo php ngt v ph thuc vo th t u tin. H iuhnh ca b x l iu phi CP gm cc chng trnh bo an v iu khin.

Chng trnh iu hnh :Chng trnh iu hnh c nhim v iu khin cc tin trnh. iu khin

cc tin trnh gm : phi hp chui cc cng vic v qun l tun t ca cc x l.Ngoi ra, chng trnh iu hnh cn qun l ngt, to bi nhng yu cu pht sinh.Nhim v quan trng khc ca chng trnh iu hnh l qun l xut nhp n ccthit b iu hnh ( bng t, a t, DCP ).

Chng trnh bo an :

Ngoi nhng chng trnh iu hnh, h iu hnh cn gm chng trnhbo an, nhm ngn nga phn ng sai lc trong h thng EWSD. Nhim v u tinca chng trnh bo an l thit lp cu hnh chc nng h thng. Gm vic np

phn mm v c s d liu t bng vo a t ri sau phn phi nhng tin tcny t b nh chung ra ton h thng EWSD. Mi phn mm ch c np phnmm v c s d liu tng ng vi nhim v ca mnh.

o th nh k ( Routine test ) :o th nh k trong DLU c thc hin m khng lm nh hng hay

ngng hot ng x l cuc gi. Qu trnh o th ny c thc hin bi phnmm bn trong LTG v DLUC. Nhng o th nh k sau y c thc hin :

- o th cc khe thi gian TSx pht hin sai st trn cc knh thoi.- o th RAM trong b nh DLU.- o th DLUC.- o th RGMG.

Ngoi ra b iu khin dch v khn cp DLU cng c vi chc nng o th nhk.

Dch v khn cp :Dch v khn cp l 1 c im quan trng ca DLU. Dch v khn cp c

bt u khi c 2 h thng DLU ( DLUC0 v DLUC1 ) iu b tr ngi trn ng

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dn n CP. Trong khi thc hin dch v khn cp, ch c cc thu bao trong cngDLU m thoi vi nhau c.

S kim tra nh k :L nhng chu trnh c lp, n ch dng kim tra nhng chc nng phn

mm h thng Cc trng thi :

- CBL ( conditional Blocked ) : kha c iu kin.- MBL (Maitenance Blocked ) : kha bo dng.- NAC (Not Accessible ) : khng cho php chim dng.- UNA ( unavailable ) : h hng.Mt n v khng sn sng lm vic khi b pht hin li bi chng trnh bo

an s chuyn sang trng thi UNA. Nhng n v khng c d phng ch c phpchuyn sang trng thi UNA khi c li nng.

Khi 1 n v cn kha mch bo dng th bt buc phi chuyn sangtrng thi MBL. Nu cn phn ngoi vi chuyn mch khng c d phng m cnkha mch bo dng th n v ny trc ht phi chuyn sang trng thi CBL,lc ny n khng c kh nng kt ni na. Nhng n v m c n v cp cao hnkhng sn sng lm vic th s chuyn sang trng thi NAC.

Nhng n v khng hin din th trng thi PLA. Chng trnh bo an c h iu hnh s dng vo vic :

-Khi pht vic kim tra nh k.-nh gi nhng bn tin cnh bo v bo an.-Ghi li nhng thng tin v li.

-nh v ch h.Khi xy ra h hng trong phn cng, th h iu hnh ti to cu hnh hthng v li trng thi chc nng. Nu h hng phn mm th h iu hnh khi

pht tin trnh phc hi ton b.Mc phc hi u tin l RESTART : mc ny nhng thng tin v li c ghili, nhng kt ni thu bao trong i cn nguyn vn.

Nu tin trnh RESTART lp i lp li m khng c hiu qu th phc hi mc cao hn l NEWSTART. mc ny mi tin trnh u chm dt, nhng ktni thu bao d dang u hy b, nhng kt ni hin hu vn c gi nguyn.

Nu c hai mc phc hi trn u khng c kt qu th thc hin mc

INITIALSTART : ton b chng trnh aps c np li t a t. Mi kt ni c hoc nhng kt ni ang trong tin trnh thit lp u hy b.b) Phn mm ngi dng :

Phn mm ngi dng chu trch nhim nhng cng vic phc hp, ring l.Phn mm ngi dng chia thnh chng trnh x l cuc gi, chng trnh qun lv chng trnh bo dng.

Chng trnh x l cuc gi:Chng trnh x l cuc gi c nhim v :

- Dch s.- X l s liu trong kt ni cuc gi v s liu trong c s d

liu .

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- Chng trnh x l cuc gi truy nhp cc bng s liu nhmchn con ng trong mng SN v thit lp kt ni bng cchchuyn mch.

- Chng trnh x l cuc gi cng c nhim v chuyn s liut CP n GP, khi pht tin trnh x l c lp cuc gitrong GP. Tin tc chuyn giao ny c gi l lnh.

Chng trnh qun l:Khc vi chng trnh x l cuc gi, chng trnh qun l khng x l

cuc gi, nhim v chnh ca n l qun l lnh MML.Vi lnh MML chng trnh qun l cho php nhp s liu mi hoc thay

i s liu trong c s d liu.Chng trnh qun l cn c nhim v in ra s liu. Ngoi ra n cn c :

- Bo v qu ti.- iu khin vic o lu thoi. Lu tr s liu v cc v s liu o lu thoi.

Chng trnh bo dng:Chng trnh bo dng c pht ng bng lnh MML. C nhim v duy

tr hot ng ca h thng. Tin trnh bo dng c th phi truy nhp mt s ccchng trnh trong h iu hnh.

Chng trnh bo dng c th khi ng : vic tm li trong phn cnghoc tin trnh o th.

Bng lnh MML c th lm thay i chng trnh thay i cu hnh vchng trnh np phn mm trong chng trnh bo dng.

Chng trnh bo dng c nhim v xut cnh bo ra bng n SYP. C s d liu :

Gm c 3 loi d liu : D liu c nh : c cp nht trong qu trnh np chng trnh

ng dng PAS. D liu bn c nh : c cp nht trong qu trnh np APS, bao

gm : d liu thu bao, d liu v u cui ng dy. Nhn viniu hnh c th thay i d liu ny bng lnh MML.

D liu thay i :M t trng thi nht thi ca tng i v hotng x l cuc gi.

Cu trc d liu :Cu trc d liu c t chc theo tng Modul d liu. Mt Modul

d liu thng gm cc bng d liu vi nhim v nh mt chng trnhng dng c lp. Cu trc ca bng d liu ph thuc vo vic lu tr dliu. D liu trong bng d liu c th l d liu bn c nh hay d liu thayi. Cc Modul d liu bn c nh hay thay i c lu tr ring bit.

Phn b d liu :C s d liu ca tng i EWSD c phn phi trong b x l iu

phi v cc b x l ca phn ngoi vi. truy xut mt cch nhanh chngtrong qu trnh x l cuc gi, mi phn h trong tng i EWSD phi cvng c s d liu ring lu tr d liu cn thit cho nhim v ca mnh

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4.3 CC LNH THNG DNG TRONG VN HNH T EWSD

4.3.1 Cc lnh trong DLU

1. To DLUCR DLU: DLU = number , TYPE = , DLU0 = ltgset-ltg-ltu-

CCS0&[ltgset-ltg-ltu-EXT0], DLU1 = ltgset-ltg-ltu-CCS0& ltgset-ltg-ltu-EXT0];

Trong :

- DLU = s DLU

- DLUC0 = a-b-c-d theo th t: s tng chuyn mch thi gian

s cng LTG s n v ng dy trung k th 1 LTU1 s n v ng dytrung k th 2 LTU2.

- DLU1: tng t DLU0.

- TYPE = loi DLU: DLUA, DLUB, DLUG.

2. To DLUMOD

CRDLUMOD:DLU = number, MOD = x x, TYPE =

- MOD = x x: s shelf s module

- TYPE = loi module: SLMACMRL, SLMACOS, SLMAFPE- DLU = s DLU

3. To s

CRSUB: DN = 3882006, EQN = 1050 0 14 15, CAT=MS,OPTRCL=1, ORIG=1;

Trong :

- DN = s thu bao.

- EQN = a b c d: s DLU s shelf s card s port.

- CAT = loi thu bao.

- OPTRCL = vng cuc gi.

- ORIG = vng tnh cc.

4. Xem trng thi DLU

STATDLU: DLU = s DLU;

5. Xem trng thi DLUMOD

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STAT DLUMOD: DLU = s DLU, MOD = S shelf s module;

6. Xem trng thi PORT

STAT DLUPORT: DLU = s DLU, LC = x x x;

Trong x-x-x: s shelf s module s port

7. Hin th DLU

DISP DLU: DLU = number

8. Hin th DLUMOD

DISP DLUMOD: DLU = number, MOD = s shelf s module

9. Hin th DLUPORT

DISP DLUPORT: EQN = x x x x

10.Thay i trng thi DLU

CONF DLU: DLU = number, DLUC0, OST = CBL;

CONF DLU: DLU = number, DLUC0, OST = MBL;

CONF DLU: DLU = number, DLUC0, OST = ACT;

11.Xa s

CANSUB: DN = 3882006;12.Chuyn v tr thu bao

MODEQN: DN = 3610787, NEWEQ = 250 3 11 3;

KT LUN

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LI CAM N

Em l sinh vin nm cui chuyn ngnh K Thut Vin Thng, khoa in in T, trng i Hc Giao Thng Vn Ti C S 2. Trong qu trnh hc t p titrng c nh trng v thy c trang b cho nhng kin thc v chuyn ngnh.V trc khi tt nghi p c thy c v nh trng to iu kin cho em c dp ithc t p cng ty VNPT Bc Liu em c th tch ly thm vn kin thc camnh trc khi tt nghi p.

Trong thi gian thc t p ti cng ty em c hc hi thm nhiu iu thngqua nhng tri nghim thc t cng vic, di s hng dn nhit tnh ca cc ccc ch, anh ch trong cng ty. Thi gian thc t p ti cng ty ngoi kin thcchuyn ngnh hc c t cc c cc ch, anh ch trong cng ty em cn hiu thmc nhiu iu v chuyn ngnh ca mnh, v cng vic ca mnh sau khi ratrng c th nh hng cho con ng ca mnh sau khi ra trng

Kin thc v nhng hiu bit v chuyn ngnh l rt rng v thay i tng ngytheo cng ngh nn cn phi tch cc hc hi v tm hiu. Qu trnh thc t p ti

cng ty c tip xc vi cc cng ngh, thit b trong ngnh vin thng em chn tng i EWSD tm hiu , nghin cu v lm ti trong qu trnh thc t pti cng ty.

Di s ch dn, gip nhit tnh ca cc Ch, cc Anh y (VNPT BcLiu) m c bit l t Tng i, gip em hon thnh c bi bo co ny. Tuynhin trong qu trnh lm bi bo co khng trnh khi nhng thiu st. Em rtmong c thy c gip em sa nhng sai st sau ny b xung kin thc chomnh v c th lm tt hn trong bi n tt nghi p

Em xin cm n cc Thy c trng i Hc Giao Thng Vn Ti C S 2 cbit l cc Thy c B mn trang b nhng kin thc qu bo cho em, lm hnhtrang cho sau ny.

Em xin cm n cc Ch, cc Anh ang lm vic ti VNPT Bc Liu m cbit l cc Ch, cc Anh lm vic phng Tng i, nhit tnh ch dn, gip em trong sut thi gian thc tp ti y.

Em xin chc cc Thy c, cc Ch, cc Anh lun trn y sc khe, lun lunvui v trong cuc sng.

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Sinh vin thc hin

Nguyn Duy Mu

bao cao ewsd

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