This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Fixed and Mobile Convergence: Which Role for
Optical Networks?
S. Gosselin, A. Pizzinat, X. Grall, ORANGE
D. Breuer, E. Bogenfeld, DTAG
J. Torrijos Gijon, TELEFONICA
A. Hamidian, N. Fonseca, ERICSSON
Optical Fiber Communication Conference and Exposition
March 26, 2015, paper Th3H.2
OFC – Los Angeles – 3/26/2015 – Th3H.2 1
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
What is network Fixed and Mobile Convergence (FMC)
OFC – Los Angeles – 3/26/2015 – Th3H.2 2
Common architecture for fixed and mobile network requires interaction at different points: Structural convergence
Common use of resources e.g. infrastructure, technology, interfaces, transport mechanisms
Functional convergence Unification of fixed and mobile
network functions
Fixed and mobile networks
are developed independently of each other
have only very limited joint usage of infrastructure
have independent network operation, control and management
FMC only at service level (e.g. IMS)
Aggregation Network
Fixed Core
Mobile Core
Fixed
access
Radio access
Today‘s network architecture Potential converged architecture
Aggregation
Network
Fixed Core
Mobile Core
Fixed access
Radio access
Functional
convergence Structural
convergence
Functional
convergence
Functional
convergence
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Why network FMC is needed for 5G design
OFC – Los Angeles – 3/26/2015 – Th3H.2 3
• Increasing number of users and
connected devices
• Need to access any content any
time anywhere with any device
(ATAWADAC)
• Bandwidth-hungry usages of
fixed and mobile customers,
driven by video streaming
• Increasing Wi-Fi traffic coming
from mobile terminals
• A resulting tight price pressure
on telcos requiring significant
CapEx and OpEx reductions
• Unification of hardware resources (equipment, cables, sites, etc.) for both fixed and mobile services
• Cost and energy savings
• Simplification of fixed and mobile network architectures
• Ease of use and ease of operation
• Network FMC will enable a 5G infrastructure with end-to-end management and orchestration capabilities
Drivers Expected benefits from network FMC
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Example of use case: “Converged access and aggregation
technology supporting fixed and mobile broadband services”
The objective is a universal access and aggregation technology allowing
appropriate scaling with respect to the fixed and mobile traffic growth
and the increasing number of mobile base stations and interconnected
devices
OFC – Los Angeles – 3/26/2015 – Th3H.2 4
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Several triggers of structural convergence will impact
optical network evolution (1)
■ Heterogeneous Radio Access Networks
♦ larger number of antenna locations
♦ required RAN coordination (small and macro cells)
♦ much more capillarity and dynamicity required from back-/fronthauling infrastructures
OFC – Los Angeles – 3/26/2015 – Th3H.2 5
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Backhaul and fronthaul with COMP coord interface
OFC – Los Angeles – 3/26/2015 – Th3H.2 6
X2 interfaces are collocated, X2 delay close to zero
Fulfils inherently X2 delay requirements for COMP <0,5ms
An interconnection of X2-Interface required, link distances between sites will cause delay.
To support COMP delay requirements < 0,5ms requires interconnection of CO or Main CO location
BACKHAUL FRONTHAUL
Backhaul: X2 interconnection on CO/Main CO required to support COMP with delay requirements < 0,5ms
Fronthaul: Fulfils inherently X2 delay requirements for COMP <0,5ms
RU
Backhaul
Network Mobile
core
RU BBU
BBU
X2-
S1-
S1-
Backhaul
Network Mobile
core
RU
BBU
BBU X2-
S1-
S1- RU CPRI-
CPRI-
BBH hotel
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Several triggers of structural convergence will impact
optical network evolution (2)
■ Mobile fronthaul and Cloud Radio Access Networks (C-RAN)
♦ Stringent requirements in line rate (multi-Gbit/s) and latency (100-500 µs
Round Trip Time)
♦ These requirements should strongly foster WDM-based access systems,
either on dedicated or shared fibre infrastructure
OFC – Los Angeles – 3/26/2015 – Th3H.2 7
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
A unified optical access / aggregation network will also
foster structural convergence
■ Requirements of a unified optical access / aggregation
♦ Converged physical layer functions supporting heterogeneous
access services for fixed, mobile and Wi-Fi
♦ Low latency ( 100-500 µs) and high capacity (~10 Gbit/s/l)
♦ Seamless interoperability with fixed/mobile network elements
♦ Dynamicity, scalability, survivability, carrier-grade operations
♦ Compatibility with legacy networks and infrastructures
• e.g. existing Optical Distribution Networks
■ Key technologies for a unified optical access / aggregation
♦ TDM/TDMA and WDM for data plane, SDN for control
♦ Different flavors could be considered, based on NG-PON2 or
DWDM photonic transport technologies
OFC – Los Angeles – 3/26/2015 – Th3H.2 8
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Two alternative scenarios to foster structural
convergence
Two main approaches for
structural transport
convergence in COMBO:
1) Access technologies
and topologies
extending into the
aggregation segment
2) Aggregation
technologies and
topologies extending
into the access segment
OFC – Los Angeles – 3/26/2015 – Th3H.2 9
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Example of fronthaul implementation based on
NG-PON2 converged access
OFC – Los Angeles – 3/26/2015 – Th3H.2 10
Cabinet CO Main CO Core CO
2G 3G 4G
FTTC
FTTH
Business
Residential + SME
Router
CPRI
BBU hotel
Eth
Power Splitter (PS)
IP/MPLS Backbone
Mobile Core
Wi-Fi Core
MASG
Fixed Core
IP
Internet
Aggregation IP/MPLS
BNG
CoMP controller
LER
CEx
RGW
RGW
RNC BSC
Macro site
ONU
ONU
NGPON2 OLT
NGPON2 TWDM ONU
NGPON2 P2P WDM ONU
TWDM
PtP WDM
AWG
User
UE
4G
4G
ONU
ONU
RF
RF
NT
Wi-Fi AP
or PS
ONU
ONU
RRH
Multi-port ONU
Femto cell
Public outdoor or indoor SC
ONU VDSL2 Vectoring
DSLAM
TWDM
TWDM
n x CPRI
DWDM
Band-filter
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Example of fronthaul implementation based on
programmable DWDM converged aggregation
OFC – Los Angeles – 3/26/2015 – Th3H.2 11
Cabinet CO Main CO Core CO
2G 3G 4G
DSLAM
FTTC
FTTH
Business
VDSL2 Vectoring
Residential + SME
Router
CPRI
BBU hotel
Eth
Power Splitter (PS)
IP/MPLS Backbone
Mobile Core
Wi-Fi Core
MASG
Fixed Core
IP
Internet
Aggregation IP/MPLS
BNG
LER
RGW
RGW
RNC BSC
Macro site
ONU NGPON2 TWDM ONU
Progr. DWDM Interface
User
NT
Wi-Fi AP
UE
4G
4G ONU RF
RF
ROADM n x CPRI
DWDM mux
ONU
NG-PON2 OLT
or GPON
CoMP controller
CPRI RRH DWDM
mux
Femto cell
Public outdoor or indoor SC
UE
TWDM PON
ONU
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Summary and conclusion
■ Structural convergence is defined as pooling / sharing of network
and infrastructure resources for several network types (fixed, mobile
and Wi-Fi)
♦ It will allow true integration of fixed and mobile networks
■ Structural convergence will be triggered by:
♦ Heterogeneous RANs
♦ Mobile fronthaul and Cloud RAN
■ A unified optical access / aggregation network with low latency and
high capacity will also foster structural convergence
■ Two main approaches can be considered for structural convergence
♦ access pushed into aggregation, based e.g. on NG-PON2 incl. WDM
♦ or aggregation pushed into access, based e.g. on programmable
DWDM technologies
■ Network FMC is fundamental for future 5G infrastructure in order to
achieve a flexible network with E2E management and orchestration
capabilities
OFC – Los Angeles – 3/26/2015 – Th3H.2 12
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
Acknowledgments
■ This ongoing work receives funding from the European Union's
Seventh Framework Programme (FP7/2007-2013) under grant
agreement n° 317762 “COMBO project”
■ Many thanks to all contributors of COMBO project for valuable inputs
and fruitful discussions
OFC – Los Angeles – 3/26/2015 – Th3H.2 13
This presentation is property of the COMBO Consortium and shall not be distributed or reproduced without the formal approval of the Project Board
OFC – Los Angeles – 3/26/2015 – Th3H.2 14
Thank you for your attention
www.ict-combo.eu