Heading towards 5G networks: market drivers and requirements on X-haul

5gAntonella SanguinetiSPM Responsible for Optical and Fronthaul

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 2

5gUSE CASES

SMART VEHICLES,

TRANSPORT

BROADBAND AND MEDIA

EVERYWHERE

SENSOR NETWORKS

HUMAN MACHINE

INTERACTION

CRITICAL CONTROL

OF REMOTE DEVICES

CRITICAL SERVICES AND

INFRASTRUCTURE CONTROL

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 3

Radio network evolution

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 4

5g Network Architecture

Radio Access Applications

Transport

Cloud Infrastructure

Management & Control

Fronthaul

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 5

Ericsson Cloud RAN

CoordinationMaximized spectrum efficiency and end-user experience

Virtualized RAN

Introducing split

architecture for full

flexibility on the road to

5G

Distributed RAN

Improved interworking

between sites and layers

Centralized RAN

Colocation of resources

and maximum

performance in traffic

hotspots

Elastic RAN

Optimal coordination

across the network for

D-RAN and C-RAN

RRUMain Unit

Main Unit

Fronthaul

CPRI

Fronthaul – a coordination enablerFronthaul is connectivity between functional blocks of a cellular radio

base station – ITU-T 802.1CM

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 6

The requirement chain

5G use cases radio technical requirements

› High User Density

› High Capacity

› Low Device Energy Consumption

› Good Cell Edge Performance

› Reduced Signaling

› Low Latency

› Access to New Spectrum

› Faster Data Throughput

› High Availability

› Quality Uplink

Capacity

Connections

Timing

Latency

Security

5G

New

Interfaces

Transport factors for radio requirements

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 7

Fronthaul: Other aspects to consider

Capacity

Connection

Latency

Security

New

Interfaces

Timing

Cost

Fiber role

FH

Evolution

TCO

Scalability

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 8

From 4G to 5G fronthaul

LTE-EvolutionBackwards compatible

NX/NR

Overall 5G solution

New spectrumExisting spectrum

10 GHz 100

GHz

1 GHz 3 GHz 30 GHz

› One common Fronthaul infrastructure, able to

transport 4G CPRI and 5G eCPRI new standard

interfaces (ref.ITU-T G.801CM)

– CPRI: TDM based – TDM or DWDM network

– eCPRI: packet based – bridged network

› Matching delay and scalability requirements of

both interfaces

5G network

DU/BPU Cluster site

PPU/RCU

eCPRI

4G network

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 9

The more wireless we become, the more

fixed-line dependent we become. Basically

all you’re doing is building this big massive

fixed-line network with wireless antennas

hanging on the end of it.

Randall Stephenson, CEO, AT&T

Fronthaulthe fiber constraints

Topology of existing fiber infrastructure may strongly

influence Operators’ placement of radios.

› 5G has much to do fiber installation and

site acquisition

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 10

The fiber constraintsRings Point to point

\

Chains

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 11

The fiber constraintsRings Point to point

\

Chains

› A modular optical solution is key to fulfil fiber plant constraints in 4G networks

› High densification in 5G will require even more building blocks to implement bridged fronthaul

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 12

› Scalability from the transport

perspective is the ability of the

network to support radio evolution

without architectural changes, at

the right cost

› It strictly connected to:

– the maximum transport resources

exploitation (e.g. fiber)

– Cost of the technology (higher rates

interfaces)

– Network infrastructure future proof-ness

– Coexistence of old and new interfaces

Scalability & capacity

radios / C-RAN Hub

CPRI rates

CPRI8

CPRI7

CPRIxx

10G

25G

40G

12 24 486

eCPRI rates

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 13

Technology & cost

Time

Costguaranteed by

production binning

C-temp guaranteed by

design

I-temp

10G SFP+’s

I-Temp 10GBASE-LR “Lite”

10G DWDM SFP+’s

• I-Temp 100GHz

• 400 ps/nm, 25dB

“Transport” DWDM

transceivers

• 1600ps/nm, 50GHz

• Stringent OSNR specs(T)-SFP28

(T)-SFP+

Future 25G Tunable SFP28

• 25G NRZ InP MZ Modulator

• >220ps/nm, 100 GHz locker-less

• -20 dBm sensitivity @5E-5

(APD receiver, RS FEC). > 20 dB

budget

• C and L band variants

• ~ 2x Tunable 10G cost

10G

grey

10G

WDM

25G

WDM

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 14

The Role of fiber and DWDM

Broadband is a key element for cities

societal, economical and

environmental development

Superior network performance

as essential component for

real-time context based

decision process and action

Society and individuals

requirements of access and

instant sharing of

information, data and videos

(4K, 3D)

Fiber infrastructure supports

› High rate traffic over a Reliable Transport Layer

› Passive, distributed and open infrastructure

DWDM technology

› Exploits operators fiber investment

› Coexistence of GPON, CPRI, Ethernet, TDM (CPRI is TDM)

› Seamless evolution towards 5G X-haul

DWDM is future proof

› Mature technology - cost reduction curve

› Up to 96 channels – for best fiber usage

› Scalable from 1G to 100G and higher

› Integrated into ERS with pluggable modules

› Ensures security, integrity and low latency

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 15

› 10G CWDM

– Proper cost per bit (no main differences

with respect to DWDM)

– 18 channels (doubling possible with 2

lasers in the same filter)

› 10G DWDM

– Proper cost per bit

– 48 channels (up to 192 with 50GHz and L-

Band)

– Best technology for higher rates

› 2.5G CWDM

– Lower cost per wavelength

– 18 channels (doubling possible, with 2

temperature stabilized lasers in the same

filter)

› 2.5G DWDM

– Higher cost per bit

– 48 channels (up to 192 with 50GHz and L-

Band)

WDM transport

› 25G DWDM

– Proper cost per bit

– Feasible with same form factor of SFP+

› 25G CWDM

– No plan

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 16

CapacityLatency

SecurityTiming

Cost

Fiber role

FH

Evolution

TCO

λ1 λ2 λ3 λ4 λ5 λ6

One solution does not fit allthe DWDM building block approach

DWDM

Connection

New

Interfaces

Scalability

Fiber fronthaul ensures lowest latency

› DWDM provides maximum fiber

exploitation

– Lowest cost per bit

– scalability

› Technologies available at volumes to fit

both CPRI and Packet interface higher

rates – C-temp, I-temp

› DWDM infrastructure as future proof

investment for LTE, LTE-evolution and

5G fronthaul

› DWDM building blocks, both active

and passive to create many different

network topologies

Ericsson Internal | © Ericsson AB 2016 | 2016-09-17 | Page 17

Next time…

Capacity

Connection

Latency

Security

New

Interfaces

Timing

Cost

Fiber role

FH

Evolution

TCO

Scalability

automation

flexibilty

TCO

Q&A

Antonella SanguinetiSPM Responsible for Optical and Fronthaul

5g