5 Things You Should Know About Fronthaul
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5 Things You Should Know About Fronthaul

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In this presentation we discuss the following topics surrounding fronthaul: ...

In this presentation we discuss the following topics surrounding fronthaul:

1. Why fronthaul?
2. Capacity requirements
3. Latency requirements
4. Fronthaul and small cells
5. Transport for Fronthaul

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5 Things You Should Know About Fronthaul 5 Things You Should Know About Fronthaul Presentation Transcript

  • 5 THINGS YOU SHOULD KNOW ABOUT FRONTHAUL
  • AVIAT NETWORKS AGENDA 1) WHY FRONTHAUL? 2) CAPACITY REQUIREMENTS 3) LATENCY REQUIREMENTS 4) FRONTHAUL AND SMALL CELLS 5) TRANSPORT FOR FRONTHAUL
  • AVIAT NETWORKS WHY FRONTHAUL?
  • AVIAT NETWORKS THE DATA STORM Growth from 1.6 EB per month in 2013 to 11.2EB in 2017 (66%)* CAPACITY GROWTH HANDHELD DEVICES NETWORK COSTS MOBILE BROADBAND By 2017 there will be an increase on 67% in handheld devices* CAPEX will increase worldwide by 6% in 2014 to $104.5 billion** 1.5 Billion Mobile Broadband Subscribers Predicted By 2015** *Source: Cisco Visual Networking Index **Source ABI Research
  • AVIAT NETWORKS DENSER NETWORKS This has several problems:  How to meet the required coverage and capacity?  How to deal with interference?  How to manage increased complexity:  To increase spectral efficiency?  To manage customer’s data?  To deal with higher CAPEX and OPEX? the only way to deal with the data storm is to have denser wireless networks with increasing spectral efficiency
  • AVIAT NETWORKS STRATEGIES FOR DENSER NETWORKS RAN DECENTRALIZATION (SON, HETNETS) TRADITIONAL MACRO CELLS ALL IN ONE BBU / SMALL CELLS BACKHAUL RAN CENTRALIZATION (C-RAN) DISTRIBUTED ANTENNAS (DAS) REMOTE RADIO HEADS (RRH) FRONTHAUL WiFi OFFLOAD OFFLOAD
  • AVIAT NETWORKS WHAT IS FRONTHAUL? ‘CENTRALIZED’ OR ‘CLOUD’ - RAN
  • AVIAT NETWORKS BASE STATION SPLIT SYSTEM SOFTWARE POWER SYSTEM BASESTATION TRANSPORT MODULE BASE BAND MODULE RF MODULE CONTROL MODULE FRONT HAUL BBU / DU (REC CPRI) digital base band RRH (REC CPRI) analog frequency functions NETWORK INTERFACE AIR INTERFACE
  • AVIAT NETWORKS ADVANTAGES OF C-RAN  Resource pooling  Greener infrastructure (re-use)  Base station virtualization  Simplified management and operation  Coordination for interference mitigation (ICIC)  Multi technology support  No GPS in each remote site
  • AVIAT NETWORKS MAIN C-RAN CHALLENGE IS FRONTHAUL  High capacity low latency Fronthaul is needed  Fronthaul distance is limited due to latency  Base band interconnection in BBU hotel  Lack of management tools on Fronthaul links  No statistical multiplexing on Fronthaul links
  • AVIAT NETWORKS C-RAN offers many benefits for operators however Fronthaul challenges need to be addressed Takeaway:
  • AVIAT NETWORKS CAPACITY REQUIREMENTS
  • AVIAT NETWORKS CPRI- NO COMPRESSION WCDMA 5 MHz 10 MHz 20 MHz 3 Sector, 4x4 MIMO, 1 Carrier 922 Mbps 7.4 Gbps 14.7 Gbps 1 Sector, 2x2 MIMO, 1 Carrier 246 Mbps 1.2 Gbps 2.5 Gbps LTE Scenario
  • AVIAT NETWORKS COMPRESSION OF BASEBAND USER DATA  Multiple baseband compression techniques are currently being researched  Commercially available IQ compression causes some distortion in IQ constellation  IQ compression currently is below a ratio of 3 to 1
  • AVIAT NETWORKS CPRI- COMPRESSION (2.5 RATIO) WCDMA 5 MHz 10 MHz 20 MHz 3 Sectors, 4x4 MIMO, 1 Carrier 369 Mbps 2.9 Gbps 5.9 Gbps 1 Sector, 2x2 MIMO, 1 Carrier 98 Mbps 461 Mbps 983 Mbps Scenario LTE
  • AVIAT NETWORKS Compression will likely be required to make wireless CPRI Fronthaul a reality Takeaway:
  • AVIAT NETWORKS LATENCY REQUIREMENTS
  • AVIAT NETWORKS CPRI-ROUND TRIP LATENCY (LTE) “cable length latency” + CORECPRI BBU TRANSMISSION MEDIUM (FIBER / MICROWAVE) RRH IP BACKHAUL RRH CPRICPRI B C A A B C+TOTAL LATENCY= } FOR CPRI= 5 µs STANDARD DEPENDENT FOR LTE (100/200 µs)
  • AVIAT NETWORKS CPRI latency requirement (<200us) will demand the use of ultra low latency Fronthaul solutions Takeaway:
  • AVIAT NETWORKS FRONTHAUL AND SMALL CELLS
  • AVIAT NETWORKS EXPANSION USING FRONTHAUL + SMALL CELL CELL SPLIT USING FRONT HAULTRADITIONAL MACRO CELL DEPLOYMENT Source: NGMN
  • AVIAT NETWORKS TRADITIONAL DEPLOYMENT + SMALL CELL (BACKHAUL) TRADITIONAL MACRO CELL DEPLOYMENT MACRO CELL + SMALL CELL DEPLOYMENT Source: NGMN BACKHAUL
  • AVIAT NETWORKS Operators will use a combination of CRAN/RRH and Small Cells Takeaway:
  • AVIAT NETWORKS TRANSPORT FOR FRONTHAUL
  • AVIAT NETWORKS FIBER / MICROWAVE FRONTHAUL COMPARISON FIBER 70/80 GHz MICROWAVE LICENSED MICROWAVE (6 to 42 GHz) CAPACITY:1 SECTOR,10MHz, 2x2 MIMO, 1 CARRIER, NO COMPRESSION CAPACITY:1 SECTOR,10MHz, 2x2 MIMO, 1 CARRIER, COMPRESSION: 2.5 LATENCY Capacity WDM self seeded PON 1 fiber upto 10 Gbps per RRH 2.5 Gbps 1.2 Gbps LOS LOS Parabolic antenna Parabolic antenna LINK LENGTHS Maximum 40Km Maximum 2Km Maximum 60Km LATENCY 5 µs per Km 3 µs per Km + processing (between 5µsec and 50µsec) 3 µs per Km + processing (between 60µsec and 298µsec) CAPEX Very high Medium Medium OPEX Low Low Low SOLUTIONS SITE LOCATION /RESTRICTIONS Right of way issues REQUIREMENTS 1.2 Gbps 461 Mbps <200 µs for LTE
  • AVIAT NETWORKS Single channel compressed CPRI is the most likely application for centimeter wave microwave Fronthaul Takeaway:
  • AVIAT NETWORKS 1. C-RAN offers many benefits for operators however Fronthaul challenges need to be addressed 2. Compression will likely be required to make wireless CPRI Fronthaul a reality 3. CPRI latency requirement (<200us) will demand the use of ultra low latency Fronthaul solutions 4. Operators will use a combination of CRAN/RRH and Small Cells 5. Single channel compressed CPRI is the most likely application for centimeter wave microwave Fronthaul CONCLUSIONS
  • W W W . AV I AT N E T W O R K S . C O M