Mang Quang Toi Thue Bao FTTx - 120422

*MNG QUANG TI THU BAO (FTTx) 04 -2013Bin san: Th.S. Phm Quc Hp

**NOI DUNGMng quang ti thu bao (FTTx)M hnh trin khai FTTx trn thc to trn tuyn quang FTTx Cp pht bng thng trong mng EPON

**Mng Quang Ti Thu Bao (FTTx)Tng quan v mng truy nhpMng quang ti thu bao (FTTx)Mng quang tch cc AONMng quang th ng GPONThit b, linh kin s dng trong FTTx

**Tng Quan V Mng Truy NhpMng nm gia tng i v thit b u cui thu bao, gm cc ng dy cp ni ht v thit b

Yu cu i vi mng truy nhp:Bng thng rng H tr x l a dng dch vGi thnh cnh tranhCht lng tt, c kh nng nng cp ln mng tin tin

**Tng Quan V Mng Truy NhpMng truy nhp cp ng (ADSL hoc VDSL):Tc bit truyn dn dn hn chTruyn song cng bt i xngC ly truyn dn b gii hn (t l nghch vi tc bit truyn)Khng p ng c nhu cu ngy cng cao v dch v bng rng rng, cht lng caoMng quang ti thu bao (FTTx)

**Tng Quan V Mng Truy Nhp

**Tng Quan V Mng Truy NhpDch v bng thng rng:Truyn d liu.Hi ngh truyn hnh (Video Conference).Xem phim theo yu cu (VoD - Video On Demand).Truyn hnh cp (CATV).Gio dc t xa.Chn on bnh t xa.Game.in thoi IP (IP Phone).Truyn hnh IP (IP TV).Truy cp Internet tc cao...

**Tng Quan V Mng Truy NhpDch v bng thng rng:

Dch vBng thng upstream (Mbps)Bng thng downstream (Mbps)in thoi IP0,20,2Internet tc cao510in thoi hnh nh11Videoconference44Game online0,51SDTV0,44HDTV0,512

**Tng Quan V Mng Truy NhpSo snh mt s hnh thc kt ni trong mng truy nhp

Type of Service/ ConnectionRated Service/ Data RateE-mail with attachment (2 MB)X-ray Photo (8 MB)Instructional Video (600 MB)DVD Movie (4.7 GB)Dial-Up56Kbps7.11 min28.43 min1.48 days11.60 daysDSL Lite416 Kbps50 sec3.33 min4.17 hrs1.63 daysDSL2 Mbps9.50 sec38.01 sec47.51 min6.20 hrsFiber10 Mbps2.13 sec8.53 sec10.67 min1.39 hrsFiber100 Mbps.21 sec.85 sec1.07 min8.36 minFiber1 Gbps.02 sec.09 sec6.40 sec50.10 sec

**Mng Quang Ti Thu Bao (FTTx)Tn dng c u im ca si quang:Suy hao thp: 0,2 dB/km ti bc sng 1550nmBng thng ln: 15 TbpsKhng dn in, khng chu nh hng ca trng in tTnh bo mt caou im ca mng quang FTTx:ng truyn c tc n nh; tc truy cp Internet cao (c th ln n 10Gbps). Khng b suy hao tn hiu bi nhiu in t, thi tit hay chiu di cp (c ly lp t 20km). An ton cho thit b, khng s st nh lan truyn trn ng dy.Truyn song cng i xngNng cp bng thng d dng m khng cn ko cp mi

**Mng Quang Ti Thu Bao (FTTx)Nhc im ca mng quang FTTx:Gi thnh thit b u cui caoHn ni, bo dng si quang cn thit b chuyn dngGi thnh h thng caoMng quang FTTx l la chn tt nht cho vic cung cp cc dch v bng thng rng, cht lng cao

**Mng Quang Ti Thu Bao (FTTx)Cu trc c bn ca mng quang FTTx:ODN: Optical Distribution Network

**Mng Quang Ti Thu Bao (FTTx)Cu trc c bn ca mng quang FTTx (tt):Central office (CO):OLT (Optical Line Terminal): tp trung dung lng cc mng thoi, data, video sau chuyn sang min quangGi phi quang ODF (Optical Distribution Frame): kt ni OLT vi cp quang gc (feeder cable) Cp gc (feeder cable): s lng si quang ln (100-1000 FO), s dng lai si quang G.652Dim phi quang (Distribution point): kt ni hoc phn chia cp gc thnh nhiu nhnh to kt ni im a imCp phi (Distribution cable): cp ngai tri, c th l cp treo, chn trc tip hoc lun ng. Si quang chun G.652D

**Mng Quang Ti Thu Bao (FTTx)Cu trc c bn ca mng quang FTTx (tt):im truy nhp quang (Access point): Thng l cc hp tp im cp quangu vo l cp phi u ra l cp thu bao,t gn thu bao nht c thDung lng khong 24-64 FOCp thu bao (Drop cable):Kt ni thit b user vi mngDung lng thp 2-24 FOSi quang chun G.652D (outdoor) v G.657 (indoor)ONT/ONU (Optical Network Terminal/Optical Network Unit):Thit b u cui thu bao cung cp giao din kt ni gia user v mngTthc hin chc nng bin i O/E v gii ghp knh lung d liu

**Mng Quang Ti Thu Bao (FTTx)Ty theo i tng khch hng v kh nng trin khai mng quang, c cc dng m hnh trin khai nh sau:Fiber To The Curb/Cabinet (FTTC)Fiber To The Building (FTTB)Fiber To The Home (FTTH)Ty theo c tnh thit b gia trm trung tm (CO) v thu bao, FTTx c th phn thnh 2 lai:Mng quang tch cc AON (Active Optical Network)Mng quang th ng PON (Passive Optical Network)

**Mng Quang Ti Thu Bao (FTTx)Fiber To The Curb/Cabinet (FTTC):FMS (Fiber Management System): h thng qun l mng cp quang bo dng v xc nh li

**Mng Quang Ti Thu Bao (FTTx)Fiber To The Building (FTTB):FMP (Fiber Management Point): im qun l quang xc nh li v pht hin mt kt ni

**Mng Quang Ti Thu Bao (FTTx)Fiber To The Home (FTTH):FMS (Fiber Management System): h thng qun l mng cp quang bo dng v xc nh li

**Mng Quang Tch Cc(Active Optical Network)Cc thit b/linh kin gia CO v thu bao l cc thit b/linh kin quang tch cc (cn phi cung cp ngun hat ng)Mt s thit b quang tch cc s dng trong mng: switch, router hay multiplexer Phn phi tn hiu t CO n ng khch hng AON c cu trc im-ni-im (point-to-point) hoc Active Star Ethernet (ASE)

**Mng Quang Tch Cc(Active Optical Network)AON cu trc im-ni imCp quang dng ring cho mi thu bao, bo mt ttKh nng iu khin phn chia bng thng cho tng thu bao t xa d dng Khong cch phc v mng xa, ln n 80kmChi ph kt ni ng truyn cao

**Mng Quang Tch Cc(Active Optical Network)AON cu trc Active Star Ethernet (ASE) Nhiu thu bao c th s dng chung ng cp quang gc thng qua mt in nm gia CO v ONTCc thit b chuyn mch ch ng c lp trong cc t cp qun l vic kt ni cc ONT t xa vn vn hnh v qun l thit b?Gim chi ph v cp si quang

**Mng Quang Th ng(Passive Optical Network)Cc thit b/linh kin gia CO v thu bao l cc thit b/linh kin quang th ng (hat ng khng cn ngun cung cp)Thit b/linh kin quang thu ng: splitter, tap coupler

**Mng Quang Th ng(Passive Optical Network)PON c cu trc im-ni-a im (point-to-multipoint) gim s lng si quang s dng v s lng thit b ti CO so vi mng AON (P2P)Gi thit b u cui cao chi ph trin khai mng lnBng thng b chia s hn ch tc bit truyn n thu bao v tnh bo mt

**Mng Quang Th ng(Passive Optical Network)Cc cu hnh mng PON:

**Mng Quang Th ng(Passive Optical Network)S kt ni tn hiu t CO n thu bao trong mng PON:

**Cp Si Quang - Linh Kin - Thit b S Dng Trong FTTxCp ngai tri:Si quang chun G.652DBn knh un cong ti thiu: 30 mmCp gc, cp phi: treo, chn trc tip, lung ngCp thu bao (drop cable)

Cp trong nh:Si quang chun G.657Bn knh un cong ti thiu: 15 mm

**Cp Si Quang - Linh Kin - Thit b S Dng Trong FTTxODF ngoi tri (outdoor)ODF trong nh (indoor)Mng sng cp quang (Closure)

**Cp Si Quang - Linh Kin - Thit b S Dng Trong FTTxDy nhy quang (jumper cord, patchcord):u ni gia cc gi u ni quang vi nhau, hoc t gi u ni quang ti thit b truyn dn.

Dy pigtailu ni gia gi u ni quang vi phn cp quang chy t ngoi vo hoc vi cc b phn thit b khc.Mt u dy pigtail c hn vi si quang, u cn li c gn u ni quang

**Thit B, Linh Kin S Dng Trong Mng Quang FTTxB tch/ghp quang (Coupler/Splitter)Mt thnh phn th ng ca mng cp quangHot ng theo nguyn tc hai chiu:

**M Hnh Trin Khai FTTxM hnh trin khai FTTx AONM hnh trin khai FTTx PONM s m hnh FTTx trin khai trn thc t

**M Hnh Trin Khai FTTx- AONTrin khai da trn thit b L2 Switch c h tr cc cng FE/GEu thng cp quang ti nh thu bao hoc cc IPDSLAM hin hu

**M Hnh Trin Khai FTTx- AONKt ni ti khch hng:Nu CPE ca khch hng h tr giao din FE quang

Nu CPE ca khch hng s dng giao din FE in:

**M Hnh Trin Khai FTTx- AONMng truy nhp quang ODN::

**Trin Khai FTTx - AON TiVNPT Khnh Ha

**Dan phi quangTT VT Din Khanh

**M Hnh Trin Khai FTTX-PON(Fujikura)

**Trin Khai FTTx Ti VNPT TP.HCMNguyn tc xy dng cu trc mng truy nhp FTTx (hng dn xy dng cu trc mng truy nhp quang th ng (FTTx) ca VNPT Q s 2039/2008/Q-VT):Lp t OLT ti cc i trm v u ni uplink vi cc thit b CES (thuc mng MAN-E) s dng kt ni GE/10GELp t ti a 2 cp b chia/ghp bquang th ng (splitter)Khong cch ti a gia cc OLT v ONU/ONT v gia cc ONU/ONT l 20kmBng thng dnh cho mi thu bao (download) yu cu t 17Mbps n 35Mbps. Kh nng bng thng uplink l 1,25Gbps (bng thng thc t l 1160Mbps) v downlink l 2,5Gbps (bng thng thc t l 2300Mbps) trn mt ng kt ni GPON. Nh vy, trung bnh mi cng GPON c th phc v t 64 n 128 khch hngChun u ni si quang l loi SC/PC

**Trin Khai FTTx Ti VNPT TP.HCM

**Trin Khai FTTx Ti VNPT TP.HCMQuy nh to chc cho cac thanh phan cua mang cap quang thue bao

Kch ban 1: Vi khu dan c mi

Mo hnh 1: Yeu cau bang thong

**Trin Khai FTTx Ti VNPT TP.HCM

**Trin Khai FTTx Ti VNPT TP.HCM T S2 TREO CTT S1 LP TRN B

**Trin Khai FTTx Ti CMC Telecom

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o trn tuyn quang FTTxo trn tuyn quang FTTx - AON:o tuyn quang ca mt thu bao khng nh hng n cc thu bao khcC th t my o OTDR ti COC th s dng bc sng o (OTDR) l bc sng ca tn hiu (1310/1550 nm) S dng my o OTDR thng thng Vic o th ging nh o tuyn quang im ni im thng thng

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o trn tuyn quang FTTxo trn tuyn quang FTTx - PON:o tuyn quang ca mt thu bao c th nh hng n cc thu bao khcKhng phi lc no cng c th t OTDR ti COYu cu cao khi o mng quang ang hot ng (in- service): phng php o v my o OTDR

Ty theo tng trng hp c th m c phng php o ph hp

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Cc vn cn quan tm khi o tuyn quang FTTx-PONCu trc mng quang FTTx im a im:S dng 1 hoc 2 splitterS thu bao c th ln n 64 thu bao

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Cc vn cn quan tm khi o tuyn quang FTTx-PONS c xy ra ti nhiu v tr khc nhau:TH1: ch mt thu bao khng nhn c tn hiu

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Cc vn cn quan tm khi o tuyn quang FTTx-PONS c xy ra ti nhiu v tr khc nhau:TH2: tt c cc thu bao khng nhn c tn hiu u c kt ni vi cng mt splitter

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Cc vn cn quan tm khi o tuyn quang FTTx-PONS c xy ra ti nhiu v tr khc nhau:TH3: tt c cc thu bao u khng nhn c tn hiu

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Cc vn cn quan tm khi o tuyn quang FTTx-PONo tuyn quang khi mng quang khng hot ng (out of service testing):C th c thc hin trong cc trng hp sau:Trong qu trnh lp tTt c thu bao u khng nhn c tn hiu (TH3)S dng connector ti cc splitter tho cc connector ra trc khi tin hnh o th C th s dng bc sng 1310/1550nm khi oV tr t my o OTDR: ti CO, ti splitter hay ti thu bao

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Cc vn cn quan tm khi o tuyn quang FTTx-PONo tuyn quang khi mng quang ang hot ng (in-service testing):Thc hin khi ch mt s thu bao b nh hng v khng s dng connector ti cc splitter Hai loi my o c th s dng:My o cng sut quang o cng sut thu v pht quang ti ONT xc nh nguyn nhn l do ONT hay do mng quang In-service OTDR pht nh sng 1625nm/1650 nmV tr t my o OTDR: ti CO hoc thu bao

*Cc vn cn quan tm khi o tuyn quang FTTx-PONYu cu i vi my o OTDR:

*Cc vn cn quan tm khi o tuyn quang FTTx-PONYu cu i vi my o OTDR:im cui ca nhnh 2 v 4 c nhn bit v xc nh ti v tr 4,503 km (mt event vi rng xung 275 ns) (event 3) im cui ca nhnh 2 v 4 khng phn bit cCc ng ra ca splitter phi c chiu di khc nhau nhn din ra c mi kt cui phn x ring rHiu chnh rng xung ph hp c dng sng tn x ngc c hin thi mt cch r rng

*Xc nh s c xy ra trn tuyn quang FTTx s dng splitterCc bc xc nh s c xy ra trn tuyn quang FTTx-PON:Ghi nhn thng tin v cu trc mng quang v s cAON hay PON?S thu bao khng nhn c tn hiuXc nh cc nguyn nhn c kh nng gy ra s c Out of service testing hay in-service testing?Tin hnh o xc nh v tr xy ra s c

*Xc nh s c xy ra trn tuyn quang FTTx s dng splitterKt qu o khi t my o OTDR ti mt ng ra ca splitter:

*Xc nh s c xy ra trn tuyn quang FTTx s dng splitterKt qu o khi t my o OTDR ti ng vo ca splitter:

*Xc nh s c xy ra trn tuyn quang FTTx s dng splitterMt s v d xc nh s c xy ra trn tuyn quang:

Trng hpV tr oHng o OTDRV tr cn quan stNhn xt rng xung c s dngLoi my o OTDR c bitTH1: Mt thu bao b rt mngNh thu bao. Ngt kt ni vi ONTHng ln (Upstream)Si quang phi (ni t thu bao n splitter gn nht) Khng cn o qua splitter v s c ch xy ra trn si quang phiNgn3-30 nsIn-service OTDRTH2: Tt c cc thu bao kt ni vi mt splitter b rt mngNh thu bao. Ngt kt ni vi ONT.Hng ln (Upstream)Si quang phi v si quang gia hai splittero qua splitter gn thu bao nhtTrung bnh100-300 nsIn-service OTDR v c dead-zone nhTH3:Tt c cc thu bao b rt mngOLTHng xung (Downstream)Si quang gc (i t OLT ra)Khng cn o qua splitterNgn100-300 nsKhng cn thit

*M Hnh Trin Khai FTTx- AON

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Cp pht bng thng trong mng PONTin trnh chun ha PON theo thi gian

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Cp pht bng thng trong mng PONLu lng hng xung

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Cp pht bng thng trong mng PONLu lng hng ln

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Cp pht bng thng trong mng PONCp pht bng thng tnh

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Cp pht bng thng trong mng PONCp pht bng thng ng

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Cp pht bng thng trong mng PONThut ton IPACT (Interleaved Polling with Adaptive Cycle Time)

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TxRx

OLT

TxRx

ONU2

TxRx

ONU3

TxRx

ONU1

ONU

Bytes

RTT

1

2

3

6000

3200

1800

200

170

120

Polling Table

6000

6000

6000 bytes

550

(a)

TxRx

OLT

TxRx

ONU2

TxRx

TxRx

ONU1

ONU3

6000

3200

6000

(c)

6000 bytes

TxRx

OLT

TxRx

ONU2

TxRx

TxRx

ONU1

ONU3

3200

6000

6000 bytes

6000

(b)

ONU

ONU

ONU

Bytes

RTT

1

2

ONU

3

6000

3200

1800

200

170

120

ONU

550

ONU

ONU

6000 bytes

TxRx

OLT

TxRx

ONU2

TxRx

TxRx

ONU1

ONU3

(d)

6000 bytes

550

1800

Bytes

RTT

1

2

3

550

5700

1800

200

170

120

ONU

550

6000 bytes

550

1800

3200

3200 bytes

5700

3200

3200 bytes

5700

6000

3200

6000

550

ONU

ONU

Bytes

RTT

1

2

3

6000

3200

1800

200

170

120

ONU

ONU

ONU

Bytes

RTT

1

2

3

6000

3200

1800

200

170

120

ONU

3200 bytes

5700

- Grant / request messages

1200

- Users data

1200 bytes

ONU

ONU

Bytes

RTT

1

2

3

550

3200

1800

200

170

120

ONU

ONU

ONU

Bytes

RTT

1

2

3

6000

1800

1800 bytes

4400

3200

1800

200

170

120

ONU

*Q & A

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Mang Quang Toi Thue Bao FTTx - 120422