1 | Infinera Confidential & Proprietary

Variation of OTN Switching Benefits in Real-World Networks Based on Network and Traffic Connectivity

Soumya Roy (Speaker), Onur Turkcu, Steven Hand, Serge Melle

Infinera Corporation

2 | Infinera Confidential & Proprietary

Industry Trends: Infonetics Operator’ Survey Increasing Adoption of OTN

Source: Infonetics Research, OTN, MPLS, and Control Plane Strategies: Global Service Provider Survey, May 2013

Core 2013 Core 2016

~95% will move to meshed transport networks

Topology

~90% plan to deploy integrated OTN/DWDM

Convergence

~70% will use OTN mesh recovery

Protection

3 | Infinera Confidential & Proprietary

Value of OTN Switching Higher Network Efficiency

4 x 10G

3 x 10G

1x 10G

Efficient converged network with OTN switching

10% fill

40% fill

30% fill

80% fill

1x10G 100G l

4x10G 100G l

100G l 3x10G

Many, poorly filled wavelengths

10% fill

40% fill

30% fill

1x10G 100G l

4x10G 100G l

100G l 3x10G

• Higher network utilization • Eliminate I/C cost, extra space/power • Eliminates many points of failure • Automated, end-end provisioning • End-to-end service protection

4 | Infinera Confidential & Proprietary

OTN Switching Benefits Virtual Degree matters; not the physical degree

A B C Y X

Optical Express (X-A)

Node A’s Virtual Degree = 4

Optical Express (A-Y)

A B C

Node A’s Physical Degree = 2

Opportunities for OTN switching exist in ring-based networks

5 | Infinera Confidential & Proprietary

OTN Switching Benefits Traffic Patterns matter

Hub & Spoke Traffic Mesh Traffic

With Mesh Traffic, diversity of traffic paths increases

• With more Diverse Paths, higher opportunities for OTN Switching

• Higher network utilization and efficiency

6 | Infinera Confidential & Proprietary

Characterizing Networks Average Nodal Degree represents Meshiness of Physical Connectivity

Ring Network Connected Rings Mesh Network

Avg Node Degree = 2.0 Avg Node Degree = 2.17 Avg Node Degree = 3.33

Diversity of Traffic Paths increases with Higher Physical Degree

7 | Infinera Confidential & Proprietary

Characterizing Networks Standard Deviation of Traffic Degrees characterizes traffic meshiness

(a) Hub & Spoke Traffic (b) Partial Mesh (c) Mesh

# o

f U

niq

ue

D

est

inat

ion

s

Node IDs Node IDs Node IDs

S.D. = 1.73 S.D. = 1.0 S.D. = 0.44

S.D. = Standard Deviation

1

5

4

3

2

Lower Standard Deviation of Traffic Degree for each node implies more meshed traffic

8 | Infinera Confidential & Proprietary

Six real-world metro and regional networks and traffic patterns

Objective: To understand the impact of network topology and traffic pattern on OTN switching benefits

Network Studies Objective: Evaluate OTN switching benefits

Network 1 Network 2 Network 3 Network 4 Network 5 Network 6

YR1 Traffic 125G 1.15T 4.4T 1.02T 300G 400G

Client Rate Type 2.5/10G 10G 1/2.5G/10/ 100G

1/10G 1/2.5/10G 1/2.5/10G

Avg. Distance (km)

56 47 67 85 105 67

# of Nodes, Links 14, 14 9, 11 39, 47 7, 10 14, 16 14, 34

Network Type MSO MSO MSO MSO Tier 1 Tier 1

Topology Type Single Ring Two Interconnected

Rings

Multiple Interconnected

Rings

Slightly Meshed

Ring + Linear Mesh

9 | Infinera Confidential & Proprietary

Line Module Savings with OTN architecture Year 1 results

4.0

3.5

3.0

2.5

2.0

4.0 3.0 2.0 1.0

0%

21%

6%

18%

0%

8%

Traffic Connectivity Increases

Net

wo

rk C

on

ne

ctiv

ity

Incr

eas

es

Circle Area represents Line Module Savings due to OTN Switching over ADM Architecture

Region of Medium to High Savings

Ave

rage

No

de

De

gre

e

(Ring)

(Mesh)

(Hub & Spoke) (Mesh) Standard Deviation (S.D.) of Traffic Degree

10 | Infinera Confidential & Proprietary

Line Module Savings with OTN architecture Year 3 results

4.0

3.5

3.0

2.5

2.0

4.0 3.0 2.0 1.0

Traffic Connectivity Increases

Net

wo

rk C

on

ne

ctiv

ity

Incr

eas

es

Region of Medium to High Savings

Ave

rage

No

de

De

gre

e

Standard Deviation (S.D.) of Traffic Degree

(Ring)

(Mesh)

(Hub & Spoke) (Mesh)

0%

19%

3%

14%

1%

13%

Circle Area represents Line Module Savings due to OTN Switching over ADM Architecture

11 | Infinera Confidential & Proprietary

Average node degree and standard deviation of traffic degrees are simple metrics to characterize optical networks

CAPEX savings of OTN switching over non-switched architectures vary with physical topology and traffic patterns

Traffic patterns play a bigger role than physical topology in determining benefits with OTN switching

Summary

12 | Infinera Confidential & Proprietary

Thank You