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18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 2
Connecting The Pieces Putting the pieces together and some
insight on the evolution of G.fast
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 3
Agenda
• Putting the pieces together
– DP elements
• GPON, RPF, VDSL coexistence/dual mode, management
– GW elements
• What’s next…
– Market evolution
– Next generation G.fast
– G.fast vs. VDSL 35b
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 4
ME
PMA
PMA
The End To End Solution
CPE (FTU-R)
EMS CPE
Netconf G.fast
G.fast ME
PMA
Operator
Network
Copper
Network
Netconf
G.fast
Video Head-End
OpenFlow
OpenFlow
(NFV)
OpenFlow
Backhaul
HON
DPU
PMA
aggregation
G.fast
SD
K
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 5
16 ports DPU
PC/Laptop
AFE
4P-DFE
AFE
Vectoring
Hybrid
Line I/F
To CPE
2.5G
SGMII
Hybrid
Line I/F
4P-DFE
4P-DFE
4P-DFE
4
4
4
4
G.999.1
G.999.1
G.999.1
Switch/NP
SFP
SFP/SFP+ Form factor
Gb-Ethernet
GPON
XPON
10G Ethernet
Etc.
DDR
Local Mng. port
2.5G
SGMII SFP
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 6
Different scenario examples
ADTRAN 500G series
G.fast Outdoor ONU
8, 16 and 24-port variants
Fully sealed enclosure for
DPU and MDU deployment flexibility
Passive cooling for completely silent
operation in residential areas
Zero construction: span or reverse- powered
GPON (via SFP ONT) and P2P fiber uplinks
Forward-compatible to
SDN-controlled architectures
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 7
Indoor DPU example
ADTRAN 624G
G.fast Indoor ONU
Supports 8-16-24 MDU living units
Supports Gigabit Broadband
10Gig Ethernet Ring uplink (ERPSv2)
GPON and NG-PON2 uplink options
Forward-compatible to
SDN-controlled architectures
Hardened Outdoor version is designed
for outdoor passive (no fan) cabinet
applications
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 8
Why Using GPON SFP
• Decoupling the ONT from the DPU
– Keeping the DPU simple
• Lower cost
• Opens the market to more vendor, i.e., more competition
– Easy migration to new optical technologies, NGPON?
• No lock up to a specific GPON vendor
– The history of GPON interoperability…
• Note – GPON SFP is gaining momentum also in the
GW market, volume is ramping up
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 9
• 4 ports DPU with RPF was demonstrated in January 2015
• Requirements and challenges
• Power
– Run one port with <12w
– NP’s may be power hungry
– Special care to avoid peaks
• Noise injection from RPF
– Special care for long loops
Reverse Power Feeding (RPF)
Sckipio RPF demo
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 10
Dual Mode DPU (G.fast + VDSL)
• Very few customers are looking for a dual mode DPU
– Makes no sense for CAB deployment
• Main issue is cost
– Two line interfaces
– Two AFE’s: one for VDSL and one for G.fast
– How to couple (or select) the two signals without a loss:
• Diplexer or a relay
– One DSP may be used for both but what
about the ratio between the number of ports
per mode
• If you optimize for VDSL, G.fast is going to be quite
expansive…
• And the alternative is quite simple
VDSL
DSLAM
G.fast
G.fast
Diplexer
Diplexer
VDSL
G.fast+VDSL
G.fast+VDSL
DP
CAB
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 11
VDSL coexistence
• Issues in both directions
• G.fast -> VDSL
– Spectral overlapping is not allowed
– G.fast may start from 20-23MHz
• VDSL -> G.fast
– VDSL in-band NEXT into G.fast
• Some filtering may be needed
VDSL G.FAST
< 17.6MHz 20-106MHz
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 12
VDSL-G.fast coexistence
• VDSL in-band signal may couple into G.fast receiver via NEXT and limit its
dynamic range (higher noise floor)
0 10 20 30 40 50 60 70 80 90 100
-140
-120
-100
-80
-60
-40
Frequency [MHz]
[dB
]
VDSL PSD mask
G.fast PSD mask
Background noiseG.fast dynamic range
NEXT
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 13
ME
PMA
PMA
Data, Management and Control Plane
CPE (FTU-R)
EMS CPE
Netconf G.fast
G.fast ME
PMA
Operator
Network
Copper
Network
Netconf
G.fast
Video Head-End
OpenFlow
OpenFlow
(NFV)
OpenFlow
Backhaul
HON
DPU
PMA
aggregation
G.fast
SD
K Network
Virtualization
OpenFlow v1.3.2
Agent
Netconf Server
supporting G.fast
YANG model
SDK API with
support for G.997.2
mng. objects
PMA example app
and partnering with
PMA solution
providers
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 14
1P-AFE
G.fast Gateway
RPF – power injector
To DP
Line I/F RG
RGMII/
SGMII
(1G)
DDR
Flash
LAN
VoIP
WiFi
HN
G.fast Integrated Gateway (CPE)
SLIC POTS
Coax/PLC
4
2
1P-DFE
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 15
G.fast CPE Examples ADTRAN 500RG series
Residential Gateway
SFP i/f for Gigabit Broadband
Rapid home installation
from eliminated home wiring
Optimized for multi-user homes
via MU-MIMO technology
ADTRAN 5660 and 6360
IP Business Gateway
Converged Gigabit Access Router
Layer 2/3 managed service delivery
Support for mobile network timing distribution
Programmed and monitored through open APIs
using NETCONF/YANG and OPENFLOW
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 16
G.fast Gateway
G.fast port Hybrid
Line I/F RG
RGMII/
SGMII
(1G)
DDR
Flash
LAN
VoIP
WiFi
HN
SFP based G.fast Gateway
SLIC POTS
Coax/PLC
1P-
G.fast
4
2
1P-DFE
VDSL
G.fast SFP
VDSL port
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 17
Why G.fast SFP
• Migration strategy from VDSL
to G.fast become easy
• Reuse existing VDSL
Residential and Business CPE
• Future proof – G.fast amendment 2?
– Interop. fixes
• Multi-mode GW – G.fast
– GPON
– 1G Eth.
• Reduce risk of interoperability
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 18
What’s next with G.fast G.fast technology going forward
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 19
G.fast is extending its scope
Distance
Port count
Short reach
100-150m
Long reach
300-350m
Low port count DPU/MDU ?
High port count Large MDU Cab deployment
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 20
G.fast is evolving -
more features to be added…
Distance
Port count
Short reach
100-150m
Long reach
300-350m
Low port count DPU/MDU ?
High port count Large MDU Cab deployment
Wider BW
Advanced precoding
Power boost
Lower noise floors
Larger
vectoring
groups
Larger
constellations Bonding
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 21
0 100 200 300 400 500 6000
100
200
300
400
500
600
700
800
900
1000
Loop length [m]
Bit-R
ate
[M
bps]
Downstream Rate/Reach
G.fast, 20-106
VDSL 35b
VDSL 17a
G.fast, 2-106
G.fast vs. VDSL 35b, downstream
• Huge advantage for G.fast for short lines. Similar performance if the target rate is 300Mbps. Advantage to VDSL+ if
the min rate target is 200Mbps (100m). No real advantage for VDSL+ if G.fast can start from 2MHz.
300Mbps target
200Mbps target C
A
B
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 22
V+ (35b) vs. G.fast Comparison
Parameter G.FAST VPLUS (35b)
Bandwidth 2-106MHz, 2-212MHz (future) 2-35Mhz
Max Rate Up to 1Gbps with path to even faster
future G.fast performance
Up to 400Mbps for 0m loops, no path
to higher speeds
Down/Up ratio Configurable: 90:10 to 30:70 Fixed ratio
Complexity 2K Carriers (more efficient) 8K Carriers (results in 4x more
memory required for vectoring)
Vectoring Designed to cope with the high FEXT
level in the G.fast band
Designed for the low 17MHz VDSL
frequencies. Significant performance
loss when FEXT is high.
Customer Self
Install
Likely – the huge rates leave margin
for handling tough in-home networks
Unlikely – performance may drop
under 17a rates
Openness 7 silicon vendors participate in the
G.fast interop. event (Plugfest)
Single vendor?
No BBF certification plan
* Sckipio implementation
18-Jun-15 Sckipio | Ultra-Fast BB seminar, June 2015 23
Summary
• We have all the elements in place
– Ready to start the evaluation of the complete solution
• New deployment strategies are developed for G.fast
– G.fast technology is evolving to align with the new requirements