roadm/oxc and related technologies/standards: enabling ... focus 2017... · roadm/oxc and related...
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ROADM/OXC and Related
Technologies/Standards:
Enabling More Agile and Open
Optical Network
Ning Deng
Optical Networks Technology & Standards
2
Outline
Industry trends and ROADM/OXC status Recent technology and solution advancement Towards more agile and open optical networking
3
Cloud Era is Coming
• East-West traffic (between DCs) will grow 4 times by 2020 • Traffic within DC will grow 3 times by 2020
Ultra-large DCs around the World
Up to 2016, there are 9027 ultra-large data centers around the world, and much more for large and medium data centers. Source:Datacentermap.
4
“Clouds” Need to Be Networked
Network
What “Network” Do “Clouds” Need?
Cloud
Network
Requirement of “Cloud”
Service adjustment is fast
and dynamic.
Latency between DCs is
low
How does “network” match
Flexible, quick response/reconfig
Shorter route;
Lower-latency node
5
5G Transport Relies Heavily on High-performance DC Interconnected Network
Ultra Low Latency Large Bandwidth ms / 10ms level E2E latency, 1~2ms one-way for bearer network
1-hop to DC
Network Slicing
Different SLA to support uRLLC service, including hard pipe, ultra low latency
• Bearer (transport) network between NB and EPC
• Bandwidth Nx10M~1Gbps per NB
Internet
EPC
Cloud BB
RRU
4G Network
RRU eNB
eNB eNB
Internet
5G Network
New Core
RRU RRU RRU RRU gNB
• MCE/MEC/New Core are based on DC/Cloud
• Bandwidth 10G+ per 5G gNB
Cloud BB Cloud BB
gNB gNB
Cloud MCE/MEC MCE/MEC MCE/MEC
Wireless Evo
lutio
n
Fronthaul: 100G per node
Backhaul: 10G+ BW per node
WDM for capacity upgrade
New core DC
Edge DC
6
7
Shortest Path and L0 Pass-through Lead to Lowest Latency
①One hop between sites
(shorter path)
②Least pass-through sites L1
L0
L2
L1
L0
L2
③Lowest added latency
of pass-through sites
L2 latency: nx100us
L1 latency: nx10 us
L0 latency: n us
Mesh connection, one hop transmission, optical (L0) pass-through lead to the lowest latency.
8
①Before clock X, 500G service
from DC1 to DC2
②After clock X, the 500G service
change to from DC1 to DC3
③Then clock Y, the 500G service
change to from DC1 to DC4
DC1 DC2
DC3 DC4
To realize the fast adjustment, cross-connect function is a must.
"Cloud" resource updates
will lead to rapid changes in
traffic among DCs
Cross-connect Is the Foundation of Fast Provisioning
9
Today’s Multi-Degree (MD) ROADM for Optical XC (Cross
connect) Needs
MD-ROADM
#2
MD-ROADM #6
MD-ROADM #5
MD-ROADM #4
MD-ROADM #3
MD-ROADM #1
Line-side XC
Local add/drop
10
(MD) ROADM Industry & Market Situation
Source: IHS Markit, Ovum
USD (M)
Global broad ROADM equipment market momentum
$0
$1,000
$2,000
$3,000
$4,000
$5,000
$6,000
2011 2012 2013 2014 2015 2016
Report1
Report2
NA
EMEA
AP
SCA
-
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Wavelength Selective Switches, Unit Sales
Source: Light Counting
Global WSS shipment and prediction
11
(MD) ROADM Industry Applications – CTC
China’s first large-scale ROADM network
• Mesh networking across 6 major provinces in East
China, 20+ nodes
• High degrees (3~8 directions)
• Intelligent optical layer restoration via WSON
Advanced technologies adopted
• Route & select architecture was used
• CD architecture mostly used with multiple add/drop
modules, CDC complementary
• Twin WSS’s were widely used, mostly 1x20 WSS’s
Courtesy of
12
(MD) ROADM Industry Applications – CMCC
For transport node, in favour of OTN matrix + ROADM/OXC
• Capacity for one node > 64T
• Optical+electrical layers fulfill restoration req.
• Optical layer bypass reduces latency.
• can auto 3R or WC by the control plane.
Courtesy of
Shanghai
Hangzhou
Nanjing Field Trial in Yangtze River Delta
13
Outline
Industry trends and ROADM/OXC status Recent technology and solution advancement Towards more agile and open optical networking
14
Recent Technology/Solution Advancement
• 1xN (N>30) WSS for line side
• Mesh networking
• One slot, one direction
• In future, NxN WXC
• MxK adWSS for add and
drop side
• Low loss, eliminating
hundreds of OAs
• Optical backplane instead of
messy fiber connections
• Eliminating hundreds of
manual fiber connections
• Embedded optical monitoring
inside the OXC
Source: http://www.on2020.org/files/ON2020_Next-Gen%20ROADM%20and%20OXC.pdf
15
Recent Technology/Solution Advancement
Sub-GHz optical spectrum monitoring
High port count, high resolution WSS
• 3.125 GHz tuning
granularity
• Intra-channel
attenuation control
for optical
equalization
Some pictures, information Courtesy of
MxK WSS for CDC add/drop
……
……
……
……
……
……
DIn
D1 D2 D3 D4 D5 Dm Dn
OXC+EXC synergy and complete performance
• Advanced optical
channel / spectrum
monitoring for the
use of OXC /
superchannel
• Well-complementary
OXC and EXC for full
service
• Complete visibility
and management of
performance: port,
connection, fiber, ,
power, OSNR, etc.
16
Outline
Industry trends and ROADM/OXC status Recent technology and solution advancement Towards more agile, reliable and open optical networking
17
ROADM/OXC and Related Technologies Offer Opportunity to
Achieve Better Optical Networking (L0 Networking)
Agile / Dynamic
PO
Resource
survey
Resource
ready
provisioning
Finish
Hardware in
warehouse
Delivery
Installation
&commission
Purchase
equipments
1 day
3 day
30~60 day
2~3 day
2~3 day
Yes
Yes
No No
Case 1
Case2
Case3
Today’s service delivering time analysis
Takes usually week(s), sometimes month(s)
Expectation from network operators: Minute(s)
How?
Today’s λ service Delivering Time
How to reach the target of 1 minute
(λ)
Case1 Days-1 week Reconfigurable + Automatic
Case2 1-2 weeks Resource Pooling / sharing + Automatic
Case3 1~2 Months
node #2
node
#N
To node #1
node #3
N×N SW &Add/drop
Optical layer visibility (optical
monitoring, telemetry, data
analysis, enhanced OAM)
Effective management and
control interface (TSDN, …)
18
19
Industry Standards Efforts Towards Agile and Open Networking
1 OTN L1 logical 100G&beyond Q11 / SG15
2 OTN OAM, protection Q11, Q9 / SG15
3 DWDM 100G interworking Q6 / SG15
4 ROADM, optical monitoring Q7, Q6 / SG15
5 L0 networking control CCAMP, TEAS, …
6 L0 networking (WTN) model Q12, Q14 / SG15
7 L0 OAM, interface, prot., etc. Q11, Q9, … / SG15
1
2
2
3
3
5
4
WDM Transport Network (WTN)
Ethernet OTN FlexOTN
WDM Channel layer WDM Section layers
WTN Clients HD-FEC frame, or SD-FEC frame+DSP frame “Adaptation layer”
WTN layer networks
Agile: adding/enhancing standards for ROADM/OXC,
optical layer monitoring/awareness, optical OAM, automatic
path setup/restoration, etc.
Open: launching optical layer (L0) networking framework,
i.e. a WDM transport network (WTN), open for all clients
Existing and forthcoming efforts:
L0 OAM
L0
Networking
/ WTN
Optical Link (OXC, OA, …) Architecture
L0 Control
Optical
interface
4
6
7
7
20
Summary
Cloud era brings the need of enhanced agile L0 optical networking
Huge capacity, meshed networking, dynamic bandwidth, low latency
next generation OXC for L0 networking
NG OXC greatly enhances MD-ROADM by
• high-degree & compact line side WSS,
• MxK add drop WSS,
• optical backplane,
• embedded monitoring, etc.
Start of standardization of WTN facilitates agile and open L0 networking
Thank you