Improving Network Synchronisation Performance
with Native Packet Optical wireless backhaul
Jon Baldry
Technical Marketing Manager
Mobile backhaul – some numbers
Source : Infonetics May 2011
Mixed-RAN cell sites dominate
Source : Infonetics May 2011
Fibre cell sites grow in all regions
Transport Ethernet – is Ethernet Transport
Native Packet Optical Mobile Backhaul – Key benefits
Optimized for TransportAggregation on packet level fills the pipes
Optimized for Low CostFew and optimized components & low power consumption
Optimized for Mobile Backhaul
No jitter, low latency,best in class sync
Optimized for low cost
Few and optimized components
Exclusive, all hardware design and no network processors; purpose built for Ethernet tasks ensuring low cost
Low power consumption due to Low Power Design
Low entry cost – pay as you grow
App 35% TCO saving over 3 hub rings.
Integrated with transport network
One management system for both optical and Ethernet layer
Ethernet
1xEMXP
Ethernet Services
Low latency / Jitter
Protection options
Standardized, understood and certified
Aggregation / Overprovisioning …..
Optical and Ethernet integrated and managed as one
network – saves cost
… Managed and handled as one Network
WDM transport:
Separate upgrade of individual nodes
Network resilience
Cost efficient capacity increase
Wavelength flexibility
• Ultra Low latency – 1.9 us one way
• All packet sizes, all traffic loads, all rules, all classifiers, all queues, all ….
• Very low jitter (<0.05 us).
Transport Ethernet - Transport Characteristics
10G NNI-NNI
Latency
0
5
10
15
20
25
68 128 256 512 1024 1280 1518 2400 4800 9596
Frame size (Bytes)
La
ten
cy
(m
icro
se
co
ns
)
Innocor Bit Forwarding
Innocor Store and Forward
Transmode’s 2.5G and 10G Transponders provide only 4 and 10 nanoseconds (per Transponder pair) latency.
Clock Synchronization Is Critical
Approach
External
synchronization
Line
synchronization
Timing
over packet (ToP)
(Adaptive clock
recovery, IEEE 1588v2,
NTP)
Synchronous
Ethernet
Multiple techniques available for the distribution and acquisition of synchronization.
L2 or L3 PSN
Client
PRC
PDH, SDH,
NTR, GPON
L2 or L3 PSN
Synchronous
Ethernet
GPS
Synchronization requirements:
Generally, 2G/3G networks require
frequency sync, with exception of CDMA
which also needs phase sync
Now with LTE, two approaches:
FDD mode – requires frequency only with
some exceptions (e.g., eMBMS)
TDD mode – requires both frequency and
phase synchronization
Implementation solutions:
Multiple proven sync options for different
environments
Migration to packet-based networks and
instances where phase synchronization is
required are leading to new approaches
Optimal solution depends on mobile
technology requirements and the available
backhaul capabilities
MBH with EMXP – Synchronous Mobile Backhaul
EMXP built for the new requirements
- Better than 1 ppb Holdover (15 min)
- About 70 times better than MEF 22.1 for LTE
networks
Real networks requires margins for air interface
< 1 ppb
G.8261
EMXP network
EMXP10 TPD10G
TPD10G EMXP80
EMXP80
PoP
RHE
SAE
200 km110 km
wander
holdover
Carrier Ethernet
Network
UNI UNIRAN BS RAN NC
PRC (owned by the
Service Provider)
“SyncE” Network Limits
MEF 22.1 Mobile Backhaul Implementation Agreement Phase 2
Measured EMXP performance in real mobile backhaul network
~70x better
MEF 22.1
LTE Networks
Real world example
Yellow - The Sync mask.
Results must be below this
line for all time periods.
Red - The performance of
the E1 based sync in the
existing network
Green - The even better
performance with SyncE
over Transport Ethernet.
These measurements were performed
over a period of a month in a live network
using multiple EMXP-80, EMXP-10/22
and EDU units over a 200+ km live
network with running at 100% throughput
giving excellent synchronization
performance and zero packet loss.
Transmode understands Sync-E transport
EMXP/II
FE/GbE and 10G
Network Synchronization
TPD10G-Lite
2x Sync-10GE
2 independent sync domains
MS-MXP
3x Sync-E (independent)
MS-MXP/10G
4x Sync-E (independent)
Layer-2
Layer-1
10x Sync-E (independent)
EDU
TPQMR
4x Sync-E
4 independent sync domains
NATIVE PACKET OPTICAL MOBILE BACKHAUL
EXAMPLES
ESB Telecoms
The Customer:
The telecoms arm of the power utility in
Ireland (Electricity Supply Board)
Ireland’s leading independent telecoms
infrastructure provider
Long term Transmode customer with
national backbone network
The Challenge:
Opportunity for mobile backhaul
wholesale service to International
operator
Requires flexible and scalable
bandwidth to mobile access
aggregation points
Virgin Media Business – about the customer
The Customer:
Large European cable operator
Addresses residential, business and wholesale
markets
The Challenges were how to provide:
Mobile backhaul wholesale service to a large
mobile operator – EverythingEverywhere and
Three via MBNL
A new solution for transport of backhaul traffic
from cell sites over fibre
Flexible and scalable bandwidth
Synchronization of mobile network
Gigabit capacity to the cell sites
Virgin Media Business – about the solution
The Solution: Ethernet Mobile Backhaul solution
EDU – cell site demarcation
EMXP II – 1G to 10G aggregation
EMXP 80 – 10G to 10G aggregation
Relies on Native Packet Optical architecture
In combination with ROADM based agile optical network
Flexible OAM capabilities across Service, Connectivity and Link layers
Why Transmode? Selected Layer 2 functionality integrated in the
optical layer
Cost efficient Ethernet aggregation
Flexible and scalable bandwidth
Outstanding Synchronous Ethernet performance
Ultra low latency and no jitter
EDU
Family of EMXPs
Family of ROADMs
Summary – Native Packet Optical Mobile Backhaul
Better economics with higher traffic scalability
Better performance – latency, jitter and synchronisation
Optimised for today and the future – 2G/3G and LTE/4G
THANK YOU!