Know Your Backbone DWDM

Transcription

1 1 Simon Sohel Baroi Ltd. AfPIF 2014 The Future of Peering Know Your Backbone DWDM

2 2 SECTION Introduc3on of the TOPIC

3 Submarine Cable ConnecDvity at Bangladesh : 3 Cable Name : Sea- Me- We 4 Benapole Operator : Bangladesh Submarine Cable Company Limited (BSCCL )

4 ConnecDvity Required Inside Bangladesh : 4 To Connect Submarine Cable Sea- Me- We 4 : Dhaka to Cox s Bazar DHAKA To Connect Terrestrial Cable to India : Dhaka to Benapole BENAPOLE Cox s Bazar

5 Where We are heading 5 n WDM n Economical & Mature & Quick n TDM n Fiber n Add fiber & equipment n STM-16 STM-64 n Cost & Complication n Time & cost Solution of capacity expansion

6 What is WDM : 6 Gas Sta3on Free Way Patrol Car

7 What is WDM : 7 Different signals with specific wavelength are mul3plexed into a fiber for transmission. λ 1 λ 1 λ 2 λ n SDH signal IP package ATM cells λ 2 λ n

8 WDM System Structure : 8 MUX DMUX O T U M 4 0 M 4 0 O T U MUX/DMUX DMUX/MUX O T U M 4 0 M 4 0 O T U

9 WDM System Structure : 9 The overall structure of the WDM system of N- path wavelength: Op3cal Transponder Unit (OTU) Op3cal Mul3plexer Unit / Op3cal De- mul3plexer Unit (OMU/ODU) Op3cal Amplifier (OA) Supervisory Channel (OSC/ESC) OTU OTU OTU O M / O A OLA O A / O D OTU OTU OTU OSC OSC OSC

10 CWDM Vs. DWDM: 10 CWDM: Coarse Wavelength Division Multiplex DWDM: Dense Wavelength Division Multiplex ITU- T G Extended C band 192chs, 25GHz spacing C band 160chs Extended 32chs THz THz THz THz

11 Band for Light: 11

12 Dispersion : 12 Power Optical pulses Transmitting L1 (km) Transmitting L2 (km) Time

13 Dispersion : 13 G.652:widely used, need dispersion compensation for high rate transmission G.653: Zero dispersion at 1550nm window. Dispersion coefficient 17ps/nm.km G nm 1550nm Ë G.655: Little dispersion to avoid FWM.

14 Dispersion CompensaDon : 14 The pulse will be broadened because of Posi3ve dispersion coefficient at 1550nm window DCF has nega3ve dispersion coefficient and can counteract posi3ve dispersion in transmission. Dispersion Coefficient G.652 Normal DCF wavelength DSCF: Dispersion Slope Compensation Fiber

15 Advantages of WDM: 15 Ultra high capacity ( 10/40/100 Gbps ) Data transparency transmission ( IPLC Connec3vity ) Long haul transmission Compa3ble with exis3ng op3cal fibers (G.652D) High performance- to- cost ra3o High networking flexibility, economy and reliability Smooth expansion ( SDH/Ethernet )

16 16 Problem WDM Network Grooming : 1) Op3cal ( Photonics ) 2) Electrical ( OTN )

17 17 SECTION WDM Op3cal Layer Grooming

18 WDM OpDcal Layer Grooming 18 A B C 10GE 10GE 10GE

19 WDM OpDcal Layer Grooming 19 A B C M 4 M 0 / D 10GE 10GE M 4 0 / D M M M4 0 / D 10GE M 4 0 / D M

20 WDM OpDcal Layer Grooming : ProtecDon 20 D A B C Working Path

21 OpDcal Layer ProtecDon : 21 D 10GE A B C 10GE Client Y Client Z

22 OpDcal Layer ProtecDon : 22 OSC FROM D Protec3on Path F I U S C M D 4 S C M D 4 F I U FROM B Working Path OPS 1 x 10GE ( Client Y ) O T N F L SITE A : With OPS Card

23 OpDcal Layer ProtecDon : ROADM 23 D A B C Working Path

24 ROADM : DeMUX Board of HUAWEI 24 D E M U X Optical Switch M U X M U X 1 2 VOA Array M U X 9 l WSS (Taking WSD9 as example): p p p p Chromatic optical signal is de-multiplexed to monochromatic optical signals. VOAs adjust the power of each monochromatic optical signal. Then guide each of the monochromatic signals to different optical multiplexer by controlling the 1 x N (that is N=9 in the figure) optical switch array. Finally transmit any monochromatic optical signal to any output port.

25 ProtecDon : How it will work 25 D A B C Working Path

26 ROADM : WSMD4 26 WSMD4 IN To Site D OUT D40 OUT AM1 DM1 DM1 AM1 10GE OTU M40 IN WSMD4 AM4 DM4 3 Degree : DirecDonless RAODM Site SITE A DM1 AM1 WSMD4 IN OUT To Site B

27 ROADM : 27 ROADM is really Expensive Per Degree we need one ROADM Card ROADM is not good for Heavy Fiber CUT in the network Overhead Cable Where fiber change the characters Op3cal Protec3on Switching is available and geeng very smart everyday. 40G/100G Technology is available and geeng cheaper, so don t need mul3ple lamda switching

28 28 SECTION WDM Electrical Layer Grooming

29 OTN (OpDcal Transport Network) : 29 An Op3cal Transport Network (OTN) is composed of a set of Op3cal Network Elements connected by op3cal fiber links, able to provide func3onality of transport, mul3plexing, rou3ng, management, supervision and survivability of client signals.

30 OTN (OpDcal Transport Network) : 30 l Compared with SDH and SONET : p p p Ultra capacity with high accuracy, Terabit/second per fiber via DWDM lines Service transparency for client signals Asynchronous mapping, powerful FEC function, predigest network design and reduce the cost l Compared with traditional WDM p p Enhanced OAM & networking functionality for all services Dynamically electrical/optical layer grooming

31 Centralized OTN Cross ConnecDon: 31 UXCM 1+1 backup 16 common slots can be used for OTU/OADM/ OA /OSC All slots can access 40G

32 OTN Cross ConnecDon Structure : 32 IU1 IU11 IU2 SCC IU12 IU3 IU4 IU5 IU6 IU10 IU9 Cross-connect Unit ODUk IU13 IU14 IU15 IU16 Centralized crossconnect bus (active) Centralized crossconnect bus (standby) IU7 IU17 IU18 IU8

33 Electrical ProtecDon Based on OTN : gbps D 640gbps 640gbps 640gbps A B C

34 ODUk ProtecDon : Site A 34 SC2 FROM D F I U S C M D 4 SCC S C M D 4 F I U FROM B N D 2 N D 2 Centralized Cross Connect Board ODUk Protec3on 1 x 10G T D X ND2 Conver3ng DWDM Signal into OTN Signal TDX Conver3ng OTU in SDH/Ethernet Signal

35 Block Diagram for Site B : 35 SC2 SCC To Site C F I U S C M D 4 S C M D 4 F I U SC1 To Site A N D 2 N D 2 S C M D 4 F I U To Site D Centralized Cross Connect Board N D 2 1 x 10G T D X ND2 Conver3ng DWDM Signal into OTN Signal TDX Conver3ng OTU in SDH/Ethernet Signal

36 36 SECTION Case Study : Dhaka to Cox s Bazar DWDM Link to Connect Sea- Me- We- 4 Submarine Cable

37 DWDM Network Design ConsideraDon : 37 Area Hilly- Rough Terrain Flat Fiber Characteris3cs Underground Over Head Power Grid Cable Need Backup or Not Future Forecas3ng Technology Trend 10G/40G/100G Think Today Not Tomorrow!!!

38 Making a DWDM Network - Case Study : 38 Area : Flat Fiber Characteris3cs Underground : Yellow Line Power Grid Cable : Blue Line Protec3on : Ring Network

39 Required Traffic Matrix : 39 NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar 0 4xSTM- 16 2xGE 4xSTM xGE 4xSTM- 16 2xGE 4xSTM- 16 1x10GE 4xSTM- 16 2xGE 4 x STM- 64 4xSTM- 16 2xGE 4xSTM- 16 2xGE 0 4xSTM- 16 1x10GE 0 4 x STM- 16 4xSTM- 16 2xGE Chandina OLA Site Fiber Loss 0.25 per km 0 4 x STM- 64 4xSTM- 16 2xGE 4 x STM Feni ( C ) OLA Site

40 Proposed Traffic Matrix by Ciena : 40 NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar 0 3xSTM- 16 2xGE 3xSTM xGE 3xSTM- 16 2xGE 4xSTM- 16 1x10GE 3xSTM- 16 2xGE 4 x STM- 64 3xSTM- 16 2xGE 3xSTM- 16 2xGE 0 4xSTM- 16 1x10GE 0 4 x STM- 16 3xSTM- 16 2xGE Chandina OLA Site Fiber Loss 0.25 per km 0 4 x STM- 64 3xSTM- 16 2xGE 4 x STM Feni ( C ) OLA Site

41 P 2 P Traffic DistribuDon : 41 COMILLA FENI (P) HATHAZARI 104 km 70 km 88 km 3 x STM16 2 x GE 3 x STM16 2 x GE 3 x STM16 2 x GE 153 km DHAKA NMC 4 X STM x STM16 2 x GE COX S BAZAR 4 x STM16 1 x 10GE 4 x STM km 85 km 111 km 175km CHANDINA FENI (C) CHITTAGONG

42 Network Proposed by CIENA : 42 COMILLA FENI (P) HATHAZARI DHAKA NMC BLUE line = edco (10G) RED line = edc40g = working port = protec3on port = pass- through COX S BAZAR STM16 & GE aggregated in Flex OTN MOTR W&P paths operated via OPS CHANDINA FENI (C) CHITTAGONG

43 Design ProperDes : 43 Traffic Matrix CIENA dropped one 10G channel to every point One STM- 16 is reduced to make the use for one 10G. 3 x 2.5 (STM- 16) + 2 GE = 10 G To Reduce the cost Hathazari to Chinagong link was dropped. OTN Services were used in single card No Centralized cross connect board were used here

44 Network Proposed by HUAWEI : 44 COMILLA FENI (P) HATHAZARI DHAKA NMC RAMAN RAMAN COX S BAZAR CHANDINA FENI (C) CHITTAGONG

45 Traffic Matrix Supported by HUAWEI : 45 NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar NMC Comilla Feni (P) Chifagong Hathazari Cox's Bazar 0 4xSTM- 16 2xGE 4xSTM xGE 4xSTM- 16 2xGE 4xSTM- 16 1x10GE 4xSTM- 16 2xGE 4 x STM- 64 4xSTM- 16 2xGE 4xSTM- 16 2xGE 0 4xSTM- 16 1x10GE 0 4 x STM- 16 4xSTM- 16 2xGE 0 4 x STM- 64 4xSTM- 16 2xGE 4 x STM- 16 0

46 Network Proposed by HUAWEI : 46 COMILLA FENI (P) HATHAZARI DHAKA NMC 2 GE Drop 8 GE Pass 2 GE Drop 6 GE Pass 2 GE Drop 4 GE Pass 2 GE Drop S3ll 2 GE Leo RAMAN RAMAN COX S BAZAR CHANDINA FENI (C) CHITTAGONG

47 Design ProperDes : 47 Traffic Matrix Full traffic was dropped according to requirement A big bypass link was crated between Hathazari and Chinagong. OTN Services were used in Centralized cross connect borad with 360 gbps license. HUAWEI used RAMAN Amplifier, which is expensive and cri3cal to handle the power of that card.

48 Network Proposed by CISCO : 48 COMILLA FENI (P) HATHAZARI DHAKA NMC All are ROADM Site DHAKA, Chinagong and Cox s is Direc3onless site RAMAN RAMAN COX S BAZAR CHANDINA FENI (C) CHITTAGONG

49 Design ProperDes : 49 Traffic Matrix Full traffic was dropped according to requirement 2x10G channel dropped every site Under- u3lized Lambda A big bypass link was crated between Hathazari and Chinagong. ROADM Card is used everywhere and 3 are direc3onless site. As, this road faces to much fiber cut, ROADM and Fixed DCM is not suitable. No Stable Product Porfolio

50 50 SECTION Conclusion

51 Why IP over WDM : 51 Latency Span Length more than 120 km. Convergence : LFA/FRR/TE/RSVP Legacy Router Doesn t Support Above Protocols Service Independent Convergence LFA/FRR/TE is a CPU hungry Process, so quality degrades Fiber Characteris3cs Through NMS without further investment

52 Why IP over WDM : 52 BGP Table : Can you guess what will be the table size tomorrow?

53 Why IP over WDM : 53

54 Know Your Backbone - Conclusion : 54 Plan your network according to your & Future need, not by limita3on of the vendor. Effec3ve use of expensive IPLC Bandwidth and more focus of Peering. Traffic Engineering at Layer- 1. DWDM Backbone is Service Independent So Future Prof. Reduce Capex Simple Configura3on - Reduce Opex

55 55 Thank You. SIMON SOHEL BAROI Limited House-7/B, Road-13, Gulshan-1, Dhaka-1212 Phone , , Fax simon.baroi@fiberathome.net