Fixedmobile Convergence: Structural convergence MoSvaSon and - - PowerPoint PPT Presentation

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 1 1 This ongoing work receives funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement n° 317762 “COMBO project”

Fixed–mobile Convergence: Structural convergence MoSvaSon and technological triggers

Dirk Breuer Tibor Cinkler Stéphane Gosselin Annie Gravey Ali Hamidian Stefan Höst Tahar Mamouni Péter Olaszi Stephan Pachnicke Björn Skubic Jose Torrijos Gijón Deutsche Telekom Laboratories, Germany Budapest University of Technology and Economics, Hungary Orange R&D, France Telecom Bretagne, France Ericsson Research, Sweden Lund University, Sweden Orange R&D, France AITIA InternaSonal, Inc., Hungary ADVA OpScal Networking SE, Germany Ericsson Research, Sweden Telefónica InvesSgación y Desarrollo, Spain

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 2 2

MoSvaSon

In the past, fixed and mobile access networks have been opNmized and evolved independently, with partly contradicNng trends

IMS/TISPAN

Service Control Layer

IPTV

W e b

… OSS, Synchronization, Platform Control

Network Control Layer IP/MPLS Backbone

“5G” 2G/3G Wi-Fi

Edge Router

Converged Broadband Fixed and Mobile Access/Aggregation Network 4G

(LTE/LTE-Advanced)

Macro

λN λ1 λN λ1 …

…

OLT BBU-H OLT BBU-H

Mobile Core Components

S-GW P-GW MME

4G

SGSN GGSN

2G/3G MSC

Fixed Core Components

BB-RAR LER

Mobile

Pico

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 3 3

Network convergence covers fixed, Wi-Fi and mobile networks

Fixed and mobile networks: § developed independently of each

• ther

§ have only very limited joint usage of infrastructure § have independent network operation, control and management § Common architecture for fixed and wireless network requires interaction at different points

§ Structural convergence

§ Simplification and common use of resources

e.g. infrastructure, system technology, interfaces and transport mechanisms

§ Focus on access and aggregation network

§ Functional convergence

§ Unification of fixed and mobile network

functions

§ Focus on functional placement in home,

access, aggregation and core network

Aggregation Network Fixed Core Mobile Core Fixed access network Radio access network

Aggregation Network Fixed Core Mobile Core

Fixed access Radio access

Functional convergence Structural convergence

Functional convergence Functional convergence

Today's network architecture

Potential converged architecture

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 4 4

IdenSfied technological triggers for structural convergence

– Heterogeneous radio access networks:

– Push structural convergence of mobile, Wi-Fi and fixed access networks because of a significantly larger number of small cell locaNons and the required coordinaNon of small and macros cells.

– BBU hostelling and mobile fronthaul technologies:

– This centralizaNon of radio access funcNons enable convergence at central

• ffices where both fixed and mobile traffic are aggregated at the same

place.

– Unified opNcal access & aggregaNon network:

– Allows structural convergence with converged physical layer supporNng heterogeneous access media and services for fixed, mobile and Wi-Fi broadband Technological triggers

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 5 5

Heterogeneous radio access network

Macro cell OpNcal Fixed Access Small cell Spot cell Macro cell backhaul

Today Massive deployment

• f new cell sites

(1000s) expected in

• nly a few years.

Massive deployment of new small cell sites requires concept of common backhaul Backhaul: the network segment between the network controller site and the radio staNon baseband units

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 6 6

BBU hostelling and mobile fronthaul technologies

Mobile fronthaul and Cloud Radio Access Networks (C-RAN) – Fronthaul: connecNon between the baseband unit and the remote radio units – Stringent requirements in line rate (mulN-Gbit/s) and latency (150 µs Round Trip Time) – These requirements should strongly foster WDM-based access systems, either on dedicated or shared fibre infrastructure

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 7 7

Impact of fronthaul on network design

– Baseband Unit (BBU) and Remote Radio Unit (RRU) are located at cell site locaNon – Baseband signals are processed at the cell site by a BBU either located at the base of the cell tower or integrated with the radio unit. BBU hostelling and mobile fronthaul technologies:

• Centralisation of radio access functions enable convergence at Central Offices (COs)

where both fixed and mobile traffic are aggregated at the same place

• Opportunity to reduce the number of COs and to reduce the costs of such sites
• Requirement comes from the RAN design

RRU RRU RRU RRU RRU RRU

Backhaul Network

BBU BBU

Fronthaul Network Backhaul Network

Radio controller Radio controller

CPRI

– BBUs are placed in a remote locaNon (e.g., CO), leaving only the radio parts, antennas and RRUs, at the cell sites. – High data rate required (LTE 3 cells, 20 MHz, 2x2 MIMO eq. 7.5 Gb/s) – Low transmission delay between BBU and RRU required due to eNodeB processing Nme (proc. + transmission: 3 ms total delay) Mobile Backhaul Mobile Fronthaul

IEEE HPSR Conference | Budapest, 2015 July 1-4 | FMC Tutorial | Structural Convergence 8 8

• Converged physical layer funcNons supporNng

heterogeneous access services for fixed, mobile and Wi-Fi

• Low RTT (< 400 µs) and high capacity (~10 Gbit/s/l)
• Seamless interoperability with fixed/mobile network

elements

• Dynamicity, scalability, survivability, carrier-grade operaNons
• CompaNbility with legacy networks and infrastructures
• e.g. exisNng OpNcal DistribuNon Networks
• TDM/TDMA and WDM for data plane, SDN for control
• Different flavours could be considered, based on NG-PON2
• r DWDM photonic transport technologies

A unified opScal access and aggregaSon network will also foster structural convergence

Requirements of a unified opNcal access / aggregaNon Key technologies for a unified opNcal access / aggregaNon