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n tt nghip H thng truyn Dn SDH Mu Thn Cn Th

GVHD: Ng Th Anh SVTH: H Ph Qu-89-

KT LUN

Cng ngh truyn dn SDH ra i nh du mt bc pht trin vt bc

trong lnh vc truyn dn. Vi nhng u im v mt gi thnh, bng tn truyn dn

rng v linh hot trong vic trin khai v m rng mng li, h thng SDH thay

th gn nh hon ton cho h thng PDH trong cc mng truyn dn vin thng . Ngy

nay, SDH rt hu ch v s ngy cng hu ch trong tng lai. Cc chun c

thi hnh, iu s ci tin kh nng vn hnh v bo dng cht lng ng truyn.

Trong qu trnh tm hiu ti tt nghip H thng truyn dn SDH MuThnCn Th, em thu hoch c nhng ni dung chnh sau:

Chng mt trnh by tng quan v cng ngh truyn dn SDH, cc c im, u v

nhc im ca SDH. Qua chng ny, em bit c i nt v s ra i ca SDH

v nhng khuyt im ca PDH.

Chng II gip em hiu r hn vcc s , cu trc nguyn l ghp knh SDH,

cc loi con tr v cu trc ghp cc lung tn hiu trong SDH. Em bit c cutrc b ghp knh theo cc chunkhc nhau v tm hiu su v cu trc b ghp

knh theo chun ITU-T. ng thi, cc thnh phn c bn ca b ghp knhnh l

n v cha thng tin u vo ContainerC, Container o VC, n v lung TU,nhm

n v lung TUG,n v qun l AU, nhm cc n v qun l AUG, mo u on

SOH, mo u on lp RSOH,mo u on ghp knh MSOH,mo u ng bc

cao HPOH,t mo u ng bc thp LO POH cng c phn tch k. Hn na,

cu trc ghp STM-N cng c minh ha qua ccphng thc ghp 4 lungSTM-1 thnh STM-4, ghp 16 lung STM-1 thnh STM-16, ghp 4 lung STM-4

thnh STM-16.

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n tt nghip H thng truyn Dn SDH Mu Thn Cn Th

GVHD: Ng Th Anh SVTH: H Ph Qu-90-

Chng III gip em nm bt tt hn cc vn v ng b trong SDH. Vic ng

b ny c thc hin nh con tr. Do , cc vn tng quan v con tr,cu to v

chc nngv hot ngca con tr c phn tch k lng.

Chng IV nghin cu v t chc v ng b mng trong SDH. Chng ny cho

em thy c cc loi hnh t chc mng trong truyn dn SDH. ng thi, chng IV

ny gip ta hiu su hn v cc loi cu hnh cng nh chc nng ni cho v ng b

mng trong SDH. V cu hnh mng, em hiu su hn v cc cu hnh nh l:cu

hnh im ni im,cu hnh ng thng,cu hnh cy,cu hnh mng vng v cuhnh hn hp. Vn chc nng ni cho, em bit c v cu trc chc nng ni

cho,cc loi thit b ni chonh SDXC 4/4 v SDXC 4/1. Hn na, chng IV cngcho ta thy c chc nng v s cn thit ca chuyn mch bo v, v cc loi s

bo v. S bo v 1+1 v 1:N l 2 v d c tm hiu.

Chng Vtm hiu v h thng truyn dn ca Vin thng Cn Th Hu Giang

v tuyn truyn dn SDH Mu Thn Cn Th. Truyn dn SDH l phng thc

khng th thiu trong mng vin thnghin nay v trong c tng lai v SDH mang li

kh nngng b mng v ng truyn tc cao.V nhng l do m SDH cng dng rng ri trong hu ht cc mng truyn dn ca Vit Nam, trong c Cn

Th. Chng ny gip chng ta bit c cu trc cc Host ca Vin Thng Cn

ThHu Giang i quatuyn Mu Thn- Cn Th. C th l, tuyn Host1- Mu Thn

- Host2/Host2 - Mn - Thun Hng - Tht Nt -Thi Thun. Trm vin thng Mu

Thn cng a ra nhng phng n iu chnh ph hp vi d kin pht trin

trong thi gian ti ca Vin thng Cn Th Hu Giang thng qua s truyn dn

mch vng Ring 1 - Host 1 - Ring 2 - Host 2.

Sau thi gian tm hiu v nghin cu, em thu c nhng kin thc nht nh

v vn h thng truyn dn SDHnh trnh by trn. Trong tng lai, nu c

iu kin em s tip tc nghin cu v tm hiu v SDH v cc thit b truyn dn

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n tt nghip H thng truyn Dn SDH Mu Thn Cn Th

GVHD: Ng Th Anh SVTH: H Ph Qu-91-

SDH. Do hn ch v thi gian, ti liu,v kin thc nn ni dung n khng trnh

khi nhng thiu st nht nh. Em rt mong nhn c s gp ca Qu Thy, C

cng ton thcc bn ti c hon thin hn. Mt ln na, em xin cm n tt ccc Thy, C v cc cc bn gip em trong qu trnh lm n.

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n tt nghip H thng truyn Dn SDH Mu Thn Cn Th

GVHD: Ng Th Anh SVTH: H Ph Qu-92-

TI LIU THAM KHO1 Nghim Xun Anh, Bi ging k thut truyn dn SDH, NXB i hc Giao

thng Vn ti, 2004.

2. Chu Cng Cn, K thut truyn dn SDH, Nh xut bn giao thng vn ti

H Ni, 2003

3. PTS. Cao Phn, H thng thng tin ng b SDH, Trung tm o to Bu

chnh Vin thng I, Tng cng ty bu chnh vin thng Vit Nam, 1996.