Giai Phap Ky Thuat GPON (FTTx) Cho Truyen Hinh SCTV

8/11/2019 Giai Phap Ky Thuat GPON (FTTx) Cho Truyen Hinh SCTV

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GII PHP K THUT GPONThnh ph H Ni l a bn rng, dn s ng. L mt th ang trong qu

trnh hin i ha vi nhiu khu chung c cao cp, cc ta nh vn phng, cc khu cng

nghip, cc trung tm gii tr,...

Theo k hoch trong nm nay dch v Truyn hnh cp ca SCTV s n c i

a s ngi dn trong a bn thnh ph. Mng cp quang cng v ang c xy

dng ti cc khu vc tim nng.Vi c im nu trn, vic la chn xy dng mng thit b quang th ng

GPON p ng c yu cu v mt k thut cng nh h tng trin khai.

Trong giai on u, d n nhm n cc khu vc dn c cao cp, cc ta nh cao

c vn phng, Ta nh chung c v mt s khu vc dn c tim nng khc. Vic la

chn cng ngh GPON cho php cung cp dch v ng truyn trn cp quang vi tc

Gigabit, gim thiu c vic u t h tng cp quang, h tng nh trm (so vi cc

thit b quang ch ng).

I. M T CNG NGH:

1. Gii thiu chung v cng ngh

Hu ht cc mng vin thng ngy nay u da trn cc thit b Active

components tm gi l cc thit b ch ng, ti thit b tng i ca nh cung cp dch

v ln thit b u cui ca khch hng cng nh cc trm lp, cc thit b chuyn tip v

mt s cc thit b khc trn ng truyn. Active components, c ngha l cc thit b

ny cn phi cung cp ngun cho mt s thnh phn, thng l b x l, cc chp nh

Vi mng Passive Optical Networks (mng quang th ng) tt c cc thnh phn

active gia tng i CO (Central Office) v ngi s dng s khng cn tn ti m thay

vo l cc thit b quang th ng, iu hng cc traffic trn mng da trn vic

phn tch nng lng ca cc bc sng quang hc ti cc im u cui trn ng

CNG TY TRUYN HNH CPSAIGONTOURIST

-----------------

CHI NHNH H NI

CNG HA X HI CH NGHA VIT NAMc lp Tdo Hnh phc-------------------------------------

H ni, ngy 10 thng 05 nm 2013


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truyn. Vic thay th cc thit b ch ng s tit kim chi ph cho cc nh cung cp dch

v v h khng cn cn n nng lng v cc thit b ch ng trn ng truyn na.

Cc b ghp/tch th ng ch lm cc cng vic n thun nh cho i qua hoc chn

nh sng li V th, khng cn nng lng hay cc ng tc x l tn hiu no v t ,

gn nh ko di v hn thi gian MTBF (Mean Time Between Failures), gim chi ph

bo tr tng th cho cc nh cung cp dch v.

Mt h thng mng PON bao gm cc thit b kt cui knh quang (OLT Optical line

terminators) t ti CO v b cc thit b kt cui mng quang (ONT Optical network

terminals) c t ti ngi s dng. Gia chng l h thng mng quang (ODN

Optical distribution network) bao gm cp quang, cc thit b ghp / tch th ng

Trong h thng mng PON, cp quang c th xut pht t tng i dch v, i ti cc

phn khu truyn dn v sau kt ni vi tng ta nh hoc cc thit b dch v c th

ghp/tch tn hiu t si cp quang chnh, s dng cc thit b ghp/tch th ng. iu

ny cho php cc phn cp quang t tin ni t tng i i ra c th c nhiu ngi s

dng cng chia s, t gim mt cch ng k chi ph trin khai cc ng dng h thng


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cp quang FTTB (fiber to the business) v FTTH(fiber to the home). Trong khi , vic

s dng tng cp cp quang ring cho tng khch hng lm tng ng k chi ph.

Trc cp quang chnh trn mng PON c th hot ng tc 155Mbps, 622Mbps,

1.25 Gbps hay 2.5Gbps, s dng cc cng ngh APON (ATM PON) / BPON (Broadband

PON), EPON (Ethernet based PONs) hay chun GPON (Gigabit PON). Bng thng cho

mi khch hng t bng thng tng cng c th gn tnh hoc ng h trcc ng

dng voice, video v data.

Vi PON, mt si cp quang n t tng i nh cung cp dch v c thphc v cho 4,

8, 16, 32, ta nh hoc nhiu hn na, va s dng cc thit b th ng tch tn hiu

quang, va s dng cc giao thc PON iu khin vic gi v truyn dn tn hiu trn

thit b truy nhp dng chung.

EPON Ethernet Based PONs

Cng ngh Ethernet dnh cho cc h thng mng truy nhp thu bao, hay cn gi

l "Ethernet in the First Mile", vit tt l EFM, kt hp mt sphn mrng cho chun

IEEE 302.3 Media Access Control (MAC) v cc lp con MAC Control vi mt h cc

lp vt l. Cc lp vt l ny bao gm mi trng cp quang, cp ng UTP, wireless...,

hay gi chung l cc lp con, ph thuc vo ng truyn vt l, Physical Medium

Dependent - PDM, dnh cho cc kt ni Point-to-Point (P2P) trong mng truy nhp thu

bao.

EFM cng c gii thiu nh mt khi nim ca mng Ethernet Passive Optical

Networks - EPON - trong topology Point-to-Multipoint (P2M) c trin khai ti cc

b tch quang th ng - passive optical splitters, cng vi cp quang PDM h trcho

topology ny. Thm vo , mt c ch iu hnh, qun tr v bo tr (OAM) cng c

thm vo thun tin cho vic iu hnh v gii quyt s c mng

EPON da trn c ch MPCP (Multi-Point Control Protocol), c nh ngha nh mt

chc nng ca lp con MAC control. MPCP s dng cc thng ip, trng thi thitt b,

cc b m thi gian iu khin truy nhp vo topology P2M. Mi ONU - Optical

Network Unit - trong topology P2M cha mt phin bn th hin - instance - ca giao


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thc MPCP, s truyn thng vi mt instance ca MPCP trong OLT - Optical line

terminator

GPON Gigabit ethernet based PONs

S mng GPON

Trong cng ngh PON, thit b OLT (Optical Line Terminal, thit b kt cui

knh quang) c t pha nh cung cp dch v, cn cc thit b Optical Network

Terminal (ONT, Thit b kt cui knh quang) c t pha ngui s dng. Thit b

OLT cung cp nhiu knh quang, mi knh quang uc truyn trn mt tuyn cp quang

trn c b lc (splitter). Nhim v ca b lc l thu v nhn cc tn hiu quang uc

nhn v pht bi OLT. Cc i dy quang truyn t OLT s tri di v kt ni ti mi

ONT. Cc bc sng truyn 1490 nanometers (buc chn la, 1550 nm) uc dng cho

bng thng chiu xung t OLT, trong cc bc sng 1310 nm s u c truyn theohung ln bi mi thit b ONT. H thng cung cp a ch, cung cp bng thng mt

cch t ng t ng cng nh vic m ha c s dung truy tr v phn tch lu

lng gia OLT v ONT.

c tnh ni bt cua cng ngh PON c th c hiu ngn gn bi hai sau: Kh nng


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tn dung phung php WDM, ghp knh phn chia theo di tn v cung cp bng thng

t ng gim thiu s lng cp quang cn thit kt ni gia OLT v b lc.Loi

b hon ton s cn thit ca ngun ngoi.

2. Gii php GPON cho SCTV ti H Ni.a. M hnh trin khai

H thng GPON ca SCTV bao gm cc thnh phn sau:

H thng core t ti Headend:


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- Router BRAS: cung cp chc nng qun l v chng thc PPPoE cho trin

khai dch v truy cp internet. L thit b ca ng kt ni ra interenet. Ton b

khch hng truy cp internet s c qun l v BW qua thit b ny. (ang t

ti Headend M nh)

- Switch Core Layer: lm nhim v tp trung cc thit b OLT

- H thng Server qun l khch hng

- H thng server Voip, VoD, IPTV cung cp dch v trible-play cho mng

GPON

H thng truy nhp khch hng:

- Thit b OLT (Optical line terninal): thit b ny s c t ti HUB, Uplink

s c kt ni quang v Headend. Bng thng kt ni l Gbps hoc 10G ty

theo s lng khch hng. Phn accesss GPON s kt ni n Slipter v kt ni

n khch hng.

- B chia quang (Slipter): B chia quang s c t HUB hoc ngoi tri ti

Node tp trung dn c. B chia c th l loi 1:N (1:4, 1:8, 1:16, 1:32, 1:64).

Ty theo k hoch trin khai ta c th t Slipter thnh nhiu cp t ti HUB

v Node.

- u cui khch hng ONT: c t ti nh khch hng, thit b ny cho php

chy trible-play do khch hng c th s dng 3 dch v ng thi.

b. Cc dch v trin khai trn mng GPON:

Vi h tng mng quang FTTx s dng cng ngh GPON cho php trin khai dch

v trible play:

- Dch v truy cp internet

- Dch v Voip

- Dch v VOD, IPTV.

a bn Thnh phH Ni l 1 a bn tim nng, chnh v vy SCTV rt mongmun cung cp cho ngi dn th 1 dch v vin thng hon ho nht, png c tt c cc yu cu v kthut cng nh ni dung chng trnh mbo cho khch hng sdng dch v ca SCTV ti H Nilun c hi lng,khng nh thng hiu SCTV.

CHI NHNH SCTV H NI

Giai Phap Ky Thuat GPON (FTTx) Cho Truyen Hinh SCTV

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