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!