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5G Transport Network Requirement for Indian Telecom By Subrata Sen


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There are few people whom we meet and connect instantly. Recently, We met Subrata Sen,  (Head, Fiber/Transport Planning at Bharti Infratel Ltd) and veteran in telecom industry during a conference. During our conversation, we  had long discussion about upcoming technologies and how important the backhaul , specially fiber is for future network.

For example, if we wish to move our telco infrastructure to Cloud, virtualize our network elements, do we have the capability to move all data traffic to centralized cloud? Mr. Sen provided his expert opinion on how the transport network needs to be redesigned and what are important parameters for the same.

Published in: Technology

5G Transport Network Requirement for Indian Telecom By Subrata Sen

  1. 1. Email : 5G Transport Requirement for Indian Telecom Subrata Sen September 2017
  2. 2. Email : Transmission Capacity Evolution 2G --- 5G 3G2G 4G 5G XX kbps XX Mbps XXX Mbps X Gbps Voice Era Video Era Video Era – Superior Experience Virtual Reality Transmission capacity increase – n x 1000 times
  3. 3. Email : 5G Network – Transport Requirement Is 5G transport is the game of high capacity only? 5G Network Service Requirement Enormous Capacity at Low Latency Network Requirement Fronthaul Backhaul Capacity* 100-200G 10-30G Latency 100 micros 1ms (one way latency from 5G base station-gNB to new core) * Depends on spectrum • Ultra high reliability • Extreme broadband • Low latency • 5G base stations are TDD, collaboration within and outside base station requires higher clock synchronization precision 1
  4. 4. Email : 5G Network – Transport Requirement – 1/2 High Precision Clock Service Latency Requirement Impact Basic 5G Service (sub-6G) Basic service unavailability Basic 5G Service (above- 6G) Basic service unavailability Coordinated feature (SMP/DMP) Performance detoriation or zero gain Network Slicing • Traditional QoS cannot meet the requirement of E2E bandwidth, latency, reliability requirement of services like eMBB, uRLLC, and mMTC. • Challenge of meeting different type of management and O&M • Network slicing addresses the issue of SLA requirement of various services and users 2 3 # 5G Networks standard is in draft stage and yet to be finalized
  5. 5. Email : 4G Network Architecture 5G Network Cloud 5G Network Model Architecture Evolution # 5G Networks standard is in draft stage and yet to be finalized
  6. 6. Email : 5G Transport Network Architecture Evolution Broadband Backbone Mobile Backbone Broadband Aggregation Mobile Backbone Broadband Access Mobile Access FTTH Broadband Access Mobile Access FTTH Multi – Service Backbone Multi – Service Aggregation Multi – Service Backbone Multi – Service Aggregation Multi – Service Access FTTH Current 5G - MS 1 5G - MS 2
  7. 7. Email : Core AGGAGG AGG ACCACC Normal HS Dense HS Core Core AGGAGG AGG ACCACC Normal HS Dense HS Core Core AGGAGG AGG ACCACC Normal HS Dense HS Core 100 GE 10 GE GE Nx100 GE 50 GE 10 GE 400 GE 100 GE 50 GE 4.5G : 10GE to site 5G : Initial Phase 50 GE to Site 5G : Mature 100 GE to Site 5G Transport Network Capacity Evolution
  8. 8. Email : VS: Virtual System CoreAGGACC CDN EPC DC Flex Ethernet Flex Ethernet Flex EthernetSlice #1 Slice #2 Slice #3 50GE 100GE ACC CORE ACC AGG eMBB slice 40G ACC CORE20G ACC AGG uRLLC slice AGG CORE15G AGG AGGmMTC slice 100GE One Physical Network is sliced into Multi-Channelized Planes Network Slicing – New Way of Service Delivery 40G
  9. 9. Email : 5G Transport Network Capacity Requirement Is Microwave Network a long term option? High Order Modulation • Carrier Grade • C-RAN Supported LOS 4x4 MIMO E Band 262 Mbps 1 Gbps 10 Gbps 2624096 QAM 2512048 QAM 2241024 QAM 251256 QAM 25< 32 QAM X4 Capacity 1 Gbps over Single Channel 28 MHz Microwave network and E band in particular will be very effective stop gap arrangement but eventually 5G cell sites has to move to fiber
  10. 10. Email : 5G Transport Network – Fiber to Towers • Mature 5G network requires all towers to be connected with fiber • Current fiber penetration of sites/tower is about 20% • Balance about 350,000 tower need to be connected with fiber • More than a million km fiber need to be deployed close to the total amount of fiber all the service provider currently have put together In India, over 80% of cell sites are connected through microwave backhaul, while under 20% sites are connected through fiber : EY Sl No Company Towers No (Approx) 1 Bharti Infratel 90646* 2 Indus 125000 3 BSNL 80000 4 ATC 60000 5 Reliance Infratel 43000 6 JIO 40000 7 GTL 32000 8 Voda + Idea 21000 9 Tower Vision 11000 10 Others 3000 Grand Total 455000 * The Bharti Infratel no is as on 31st March 2017 #The above figure are approximate and does not represent the actual figure
  11. 11. Email : 5G Network Challenges in India At a time when India is trying to align itself with the global markets for 5G technology, industry stakeholders and experts believe that the migration from existing networks to 5G will be full of roadblocks with backhaul being the major challenge – ET Telecom 5G launch in India is 4 to 5 years away due to high capex, debt and dearth of fiber backhaul: EY 5G a distant dream for India when backhaul takes a back-seat: Experts India would have to invest $60 billion-$70 billion for 5G : EY 1 2 3 4
  12. 12. Email : 5G Transport Network – Way Forward Traditional Model SP – Capacity & Network Planning SP – Fiber & Equipment Deployment SP – Capacity Provisioning SP – Life Cycle Management Alternate Model – Independent Capacity Provider ICP – Capacity & Network Planning ICP – Fiber & Equipment Deployment ICP – Capacity Provisioning ICP – Life Cycle Management SP1 – Capacity with customize SLA SP..n – Capacity with customize SLA Customized SLA Reporting Transport Network should evolve from current Network Centric to in future to Demand Centric
  13. 13. Email : 5G Transport Network – Way Forward Value Proposition of Independent Capacity Provider 1 Minimize duplication of fiber routes 2 Deploy very large capacity in least cost per bit to serve 3 One stop solution for SP for all type of capacity and SLA requirement 4 National NOC to monitor and ensure service wise SLA fulfillment 5 Significant OPEX efficiency in Fiber & Equipment life cycle & NOC management SP can focus on its core business area of customer acquisition and customer satisfaction and allow ICP to manage its capacity piece
  14. 14. Email : 5G Network Deployment Strategy 2G, 3G & 4G Era Transport FOLLOW Network 4.5G & 5G Era NetworkTransport FOLLOW Will the 5G Network deployment strategy challenge the conventional model?
  15. 15. Email : Thanks