Next Generation Access Ivan Boyd BT Research and

Next Generation Access Ivan Boyd BT Research and Venturing

NGA - The Barriers: • High upfront capital investment • Large civil infrastructure costs and effort • Uncertain Operational Cost • Uncertain take-up rates • Uncertain revenues from new broadband services • Regulatory Uncertainty © British Telecommunications plc

BT Current Position on FTTP • BT infrastructure operations in separate unit called Openreach • Openreach will own infrastructure of future Optical Access/ Metro Network • Openreach provides equal access for all Communications Providers (CPs) - Equivalence of Input (EOI) • FTTP viable in Greenfield sites with ~>20 premises – (actual number depends on detailed economics) • GPON preferred FTTP solution • No commitment at this point to mass market roll out of FTTP. © British Telecommunications plc

Research to address the Challenges Capital Cost - New architecture to eliminate equipment - Improved and more efficient deployment processes - Maximise the lifetime of infrastructure (plan day 1 for evolution) Operation Cost - Simplify the network - Consolidate nodes © British Telecommunications plc

Research Network Vision 1000 -way split 10 Gbit/s 100 km © British Telecommunications plc

Steeping stones to the Vision 1. Extended Reach GPON (60 km reach, 128 -way split, 2. 5/1. 25 Gbit/s) ONU OLT W Local Exchange ONU 4 X 4 ONU 4 x 32 -way Split OLT S Demo 1: 128 -way total split ONU 60 km 2. Asymmetrical Long Reach (100 km reach, 512 -way split, 10/2. 5 Gbit/s) CUSTOMER Client ONT ACCESS/ BACKHAUL GPON METRO NODE CORE NODE OLT Super Metro Node Demo 3: Demo 2: Demo 3: Jack PC Client Video Client ONT HD CCTV Media PC ONT LR-PON OLT PE Aggregator hi. D 6630 Demo 3: Xbox 360 P Core Ethernet hi. D 6670 Super Metro Node IP/MPLS Core Ethernet PBT/PBB-TE P 100 km l Optical Core DWDM GMPLS control PE Cisco CRS Core Ethernet hi. D 6670 ONT © British Telecommunications plc METRO NODE CORE NODE l Switch Video Services Server Jack PC Server HD CCTV

Capex savings: Conventional FTTH vs Long reach PON 50% Penetration, No Duct Build ONU's Rural Fibre Enclosures Fibre Cable Cost per Customer Urban Backhaul SDH Backhaul Long Reach PON PON – backhaul Exchange Electronics FSAN PON 1: 1 © British Telecommunications plc Splitters

Infrastructure Research – Deployment Cost savings • Single man blown fibre • Overhead Blown fibre • Duct congestion relief © British Telecommunications plc Cost reduced by ~1/3

Evolution to Future networks-extending the infrastructure life Day 1 Greenfield GPON deployment to metro node LR-ONU GPON At day one install WDM couplers in local exchange backhaul GPON –ONUs with blocking filters Local Exchange Optical NTE to simplify ONU upgrade Cable chamber Fibre lean cable back towards Exchange GPON-ONU LR-ONU © British Telecommunications plc GPON-ONU LR-ONU

Upgrade to Long Reach PON to metro node LR-ONU GPON OLT removed from local exchange backhaul GPON Local Exchange Cable chamber Fibre lean cable back towards Exchange GPON-ONU LR-ONU © British Telecommunications plc GPON-ONU LR-ONU

Capex savings: Long reach PON + Optical NTE deployed with infrastructure 50% Penetration, No Duct Build Optical NTE Duct Build ONU's ONU Rural Fibre Enclosures Fibre Cable Cost per Customer Urban Backhaul SDH Backhaul Long Reach PON – backhaul Exchange Electronics FSAN PON 1: 1 © British Telecommunications plc Splitters Long Reach PON

Operational Cost High Density Pop, Head End Consolidation Op. Ex 51% Op. Ex Savings 5 km 1 x 4, 1 x 8 © British Telecommunications plc 20 km 1 x 4, 1 x 8 59% Op. Ex Savings 20 km 1 x 4, 1 x 32

Fiber-Related Op. Ex High Density Pop, Head End Consolidation 8. 8% Savings/Sub/yr 47% Savings/Sub/yr Even greater savings to be expected with LR -PON 5 km 1 x 4, 1 x 8 © British Telecommunications plc 20 km 1 x 4, 1 x 8 20 km 1 x 4, 1 x 32

CO-Related Op. Ex High Density Pop, Head End Consolidation Greater CO consolidation with LR-PON. Therefore much greater savings anticipated. 4 COs 75% Savings/Sub/yr 1 CO 5 km 1 x 4, 1 x 8 © British Telecommunications plc 20 km 1 x 4, 1 x 8 75% Savings/Sub/yr 1 CO 20 km 1 x 4, 1 x 32

Conclusions • There is no economic case for large scale FTTP roll out in the UK based on existing solutions • Research team investigating a radical “Long Reach PON” solution that changes the economic structure of networks: – Longer reach access to eliminate metro networks – Higher capacity – 10 GBit/s symmetrical – Greater split/sharing to improve economics – Network simplification and node consolidation to reduce opex – Optical NTE and Self-install ONU to reduce capital cost of the infrastructure provider and simplify upgrades • An intermediate step could be extended reach GPON • There is an on-going need for infrastructure research that addresses more efficient fibre deployment © British Telecommunications plc