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A Practical Look At Lte Backhaul Capacity Requirements

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A Practical Look at LTE Backhaul Capacity
Requirements

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  • 1. A Practical Look at LTE Backhaul Capacity Requirements Esteban Monturus Backhaul Market Analyst esteban@maravedis-bwa.com January 13th, 2011BROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2010 Maravedis Inc.www.maravedis-bwa.com
  • 2. Agenda !  Backhaul Capacity Requirements of LTE !  Backhaul Capacity Discussion !  How Microwave meets Backhaul Capacity Needs of LTE !  Backhaul Trends among LTE Operators !  Q&ABROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 3. Backhaul Capacity RequirementsBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 4. Mobile Data Trends Monthly data consumption Mobile broadband subscriber base Operator Country Traffic/User TeliaSonera Sweden and 14 GB (LTE) Norway Yota Russia 13 GB (WiMAX) Packet One Networks Malaysia 10 GB (WiMAX) Clearwire US 7 GB (WiMAX) SK Telecom Korea 7 GB (HSPA) CSL (HSPA) Hong Kong 6 GB Average Monthly Data Consumption Source: 4GCounts Service Source: 4GCounts Service Princing plans Network capacity, new deploymentsBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 5. Deployment Trends Commercial Channel Operator Country !  147 LTE committed Launch bandwidth operators at the end TeliaSonera Sweden 12/2009 2 x 20 MHz of 2010 TeliaSonera Norway 12/2009 2 x 20 MHz !  Long Term HSPA TeliaSonera Finland 11/2010 2 x 20 MHz Evolution as TeliaSonera Denmark 12/2010 2 x 20 MHz alternative Telenor and Sweden 11/2010 2 x 20 MHz Tele2 !  Currently 11 LTE Vodafone Germany 12/2010 2 x 10 MHz networks in commercial operation From 2 x 1.4 MetroPCS USA 09/2010 MHz to 2 x 10 !  Main uses of LTE MHz Verizon USA 12/2010 2 x 10 MHz !  High capacity Telekom overlay Austria 10/2010 2 x 20 MHz Austria NTT !  Rural Internet DoCoMo Japan 12/2010 2 x 20 MHz access CSL Hong Kong 11/2010 2 x 10 MHzBROADBAND WIRELESS INTELLIGENCE Source: 4GCounts Service Copyright All Rights Reserved 2011 Maravedis Inc. ©www.maravedis-bwa.com
  • 6. LTE Site Capacity Requirements !  Operators are currently deploying 3GPP Rel. 8 !  10 or 20 MHz (2x2 downlink MIMO) !  3-sector cell sites !  Peak rates never achieved due to Mbps !  Interference !  Network load !  Final objective: IMT-Advanced (LTE-A) Peak Peak 20 Average Average Average Direction Peak 10 MHz efficiency MHz efficiency 10 MHz 20 MHz Rel. 8 1.73 bps/ 17.3 35.6 5 bps/Hz 50 Mbps 100 Mbps Downlink Hz/cell Mbps Mbps Rel. 8 1.52 bps/ 15.2 30.4 2.5 bps/Hz 25 Mbps 50 Mbps Uplink Hz/cell Mbps Mbps LTE-A 3 bps/Hz/ 15 bps/Hz 150 Mbps 300 Mbps 30 Mbps 60 Mbps Downlink* cell LTE-A 6.75 bps/ 2.25 bps/ 22.5 67.5 Mbps 135 Mbps 45 Mbps Uplink* Hz Hz/cell Mbps * Spectral efficiency for indoor coverage, the most demanding situationBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 7. Microwave for Aggregation !  Current microwave technology allows aggregation !  Statistical multiplexing increases aggregation capability in practice !  Bringing rings closer to last mile enhances multiplexing !  Service-aware routing doubles capacity Source: Maravedis’ Wireless Backhaul from an All-IP Perspective Report – October 2010 TDM+packet packet LAST MILE AGGREGATION METROBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 8. Backhaul Capacity DiscussionBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 9. LTE Backhaul TrendsBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 10. Commercial LTE in Europe !  Europe: traditional microwave domain. Backhaul Operator Country type !  TeliaSonera group !  LTE in urban areas, fiber available. TeliaSonera Sweden Fiber !  New LTE markets depend on backhaul TeliaSonera Norway Fiber availability. TeliaSonera Finland Fiber !  100-150 Mbps capacity per site. Telenor and !  Microwave not discarded. Sweden Fiber Tele2 !  Vodafone Germany Vodafone Germany Fiber !  Only rural deployment so far. Telekom !  49,800 kilometer of fiber optic cable. Austria Fiber Austria !  Partnership with utility company RWE Source: 4GCounts Service to use its fiber deployment. !  Telekom Austria !  500 million euros investment to connect 4,000 BSs by fiber (AirToFiber marketing campaign).BROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 11. Commercial LTE in North America !  North America: traditional copper Operator Country Backhaul and fiber domain. type Fiber + !  Verizon MetroPCS USA microwave !  Verizon Global Wholesale Fiber + provides fiber links for +3,500 Verizon USA microwave cell sites (25 states). Source: 4GCounts Service !  +100 Mbps fiber + microwave links from alternative carriers (CenturyLink, Conterra Broadband, Duke Net, FiberTower, PalmettoNet, Paradigm Telecom, Qwest, Telecom Transport Management and USCarrier). !  Seeking tower and backhaul owners for rural deployment. !  MetroPCS !  Ethernet services to cell sites from FiberTower Corp. FiberTower transport networkBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 12. Commercial LTE in APAC Backhaul Operator Country type !  Japan, China, Korea and Hong NTT Kong: traditional fiber domains. DoCoMo Japan Fiber !  NTT DoCoMo CSL Hong Kong Microwave Source: 4GCounts Service !  Using fiber-connected Remote Radio Heads for improved indoor coverage (all outdoor and indoor versions). RRH RRH !  Hong Kong CSL Delay !  One of the few operators RRH difference currently using microwave for 40 km max. LTE backhaul. !  100-170 Mbps capacity per site. WiMAX WiMAX LTE LTE LTE Indoor rack Source: 4GGear ServiceBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 13. Why not Microwave for LTE backhaul?!  LTE footprint still too small, so operators are finding fiber available within the initial coverage area.!  Other backhaul means will be necessary to achieve the required quality of experience: !  Macrocell backhaul !  Microwave links (including millimeter wave) !  Free Space Optics !  Small cell backhaul !  Non-line of sight wireless backhaul !  Strand-mount (DOCSIS backhaul) !  Remote Radio Heads (RRH)BROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 14. LTE BACKHAUL REQUIREMENTSA REALITY CHECKP E T E R C R O Y, S E N I O R N E T W O R K A R C H I T E C T, AV I AT N E T W O R K S 1
  • 15. LTE Cell: Single User Throughput Estimates !"#"$%"#&$!()*+,$-./,01$203$!40#")5&$678$9&::$9&)#&7$ 9;"))&:$<")=(4=#;$ 9:0&$ .&=4>8$ ?"7$ @.;A$ BC$*$@3D$ BB$*$E3C$ @3D$*$B3F$ $G?!!$#H,45":I$BJ.KA$ LE$*$BL3L$ MF$*$N3@$ BL$*$L3F$ MJ.KA$ F@$*$MF$ @D$*$BF$ MF$*$N3@$ •  IP packet throughput rates vary with RF channel bandwidth and user distance from cell center •  Majority of handsets in a cell/sector are located within medium & far distance from the cell center (>90% of cell coverage area) K4O;$PQR$="#"$0,&&=0$7&S>47&$&T5:>042&$>0&$6$7"=4$5&::U $M$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 16. Estimating LTE Cell Backhaul Capacity 9&::$/"5b;">:$5","54#H$-./,01$203$=&,:H8&)#$"7&"$ 9;"))&:$ !&)0&$+7/")$ `>/c>7/")$ %>7":$ G5:0&$7")O&$#;7>O;,>#I$ G8&=4>8$7")O&$#;7>O;,>#I$ G8&=4>8$7")O&$#;7>O;,>#I$ <")=(4=#;$ @.;A$ MJ$G^<?$EI$ BE$G^<?$EI$ F$G^<?$@I$ $G?!!$#H,45":I$$BJ.KA$ @J$G^<?$EI$$ EE$G^<?$EI$ MJ$G^<?$@I$ MJ.KA$ BJJ$G^<?$EI$ D@$G^<?$EI$ LJ$G^<?@I$ •  Typical macro cell tower hosts 3 LTE radio sectors •  Site backhaul capacity with overbooking factor (OBF) between 3 and 5 •  Capacity includes 15% dynamic range margin for QoS •  Figures are already LTE high-end estimates, higher capacities through reducing overbooking factor to 1 from 3 PQR$/"5b;">:$7&":40d5"::H$BJe0Z$)#$BJJe0$6$./,0 $E$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 17. Backhaul Capacity Trend: 10MHz LTE Channel 9","54#H$ PQR$04)O:&$0&5#7$/"5b;">:$ ./0#123-435678#97":#47;<-# -./,01$ 124-=>2?=1#@.7A34#BC# 5","54#H$7&S>47&8&)#$ BJJ$ !"!#$%$&#(!)*$# C@$ +"+#$%$&#(!)*$## DJ$ @J$ ,-#$%$&#(!)*$# LJ$ EJ$ J$ PQR$:">)5;$ `&7245&$>,#"b&Z$ X&($MTM$;")=c$ LTL$>,O7"=&Z$ Q48&$ X&($="#"$,:")0$ 0&#0Z$87&$04#&0$ `&7245&$>,#"b&$L$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 18. Backhaul Topology Comparison for LTE PQR$<"5b;">:$Q,:OH$ !"40H$5;"4)$ K>/$f$ Q7&&*$ $.&0;*$ ?&"#>7&$ `,b&$ Q4&7&=$ $%4)O$ 9","54#H$=40#74/>d)$ W5;4&2&$7&S>47&=$ )&#(7b$"2"4:"/4:4#H$ g724=&$PQR$5&::c#c5&::$ 5))&5d24#H$GhMI$ X&#(7b$50#$6"5#7$ ?>#>7&$,76$6"5#7$ .&0;$7$%4)O$#,:OH$/&0#$67$PQR$/"5b;">:$)&#(7b$ $@$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 19. Backhaul Capacity Example: Ring Architecture •  Six cell backhaul in dense urban area @50Mbps •  Multiple site packet capacity not simply sum of cell capacities •  Network recovers from any single link failure 70Mbps 50Mbps 100Mbps 150Mbps To/from core network 50Mbps 70Mbps 50Mbps W==4d)":$74)O$04#&0$):H$"==$4)57&8&)#":$5","54#HU $D$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 20. The LTE Hype Cycle Y^+$W%R$ KR%RU$ %&$ !"#$ i"7#)&7$KH,&$9H5:&Z$BNN@$C$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 21. LTE Capacity Conclusions •  LTE backhaul capacity needs are regularly over-stated •  Capacity is fixed per site and only determined by base station technology •  The backhaul limit for a site will likely be ~150 Mbit/s for a 10MHz LTE radio channel •  Only way to add more network capacity: -  Add more cell sites, upgrade to MIMO or increase the LTE channel bandwidth •  Ring/Mesh topologies are best suited to cope with the high capacity requirementsF$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 22. HOW LICENSED MICROWAVEMEETS THE BACKHAUL CAPACITYNEEDS OF LTES T U A R T L I T T L E , D I R E C T O R O F M A R K E T I N G , AV I AT N E T W O R K S 9
  • 23. Uncertainty can lead to bad backhaul choices •  Backhaul discussion often in terms of hundreds of megabits or even gigabits of capacity •  Just one in four mobile operators have said that they understood the requirements for LTE backhaul •  This uncertainty could drive over- investment for backhaul capacity that is not needed within the foreseeable futureBJ$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 24. LTE Cell-Site Capacity9","54#H$ B$i/4#*0$ 6-70898$60/3(4-D*$,-.-/012$$ E((8$+(3$ +9193*$ /-.-/012$ F3(415$ 9&::c04#&$ 6-70898$,*::;<01*$,-.-/012$ 9","54#H$$ =>??;@??6A01B<C$ 9>72&$ Q48&$ ()*$(+$,-.-/012$&3(415$ 6-70898$,*::;<01*$,-.-/012$ Y>$5")e#$>#0#74,$.]$5","54#H$#$"$5&::c04#&$c$,;H0450$()e#$"::($4#U $BB$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 25. Why pay for capacity you may never need? •  The total cost of building or leasing fiber to the cell- site far exceeds that of a typical microwave connection •  Over-building capacity with fiber will waste an enormous amount of network investmentsBM$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 26. The 3 Most Important Backhaul Decision Factors ,PQP,M"R$ ,LN"$ E#!MPSM!M"R$ $<64-D7E3#J74# $<64-D7E3#<F# $<64-D7E3#6-GG3613;# 3"633;F#./0#6388# 6237?34#127G#HI34# 6388#F<13F#-K3G#27E3# F<13#67?76<1A# @<G#G3748A#788#67F3FC# >437134#=?593#127G# ;397G;F# HI34#F<13F# #-/5$:0)G$)**H<$1($A*$ *D-:9-1*H$1($9)H*3<1-)H$ LE$ 80/3(4-D*$-)H$IA*3$ EMNO$ /(<1<$-)H$/-.-/0J*<K$BE$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 27. Microwave Capacity Expansion Options •  Native Ethernet transport •  Adaptive Modulation •  Adaptive Coding •  Ethernet Frame suppression and compression •  Capacity-doubling through co-channel operation with XPICBL$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 28. Microwave techniques for high capacity W==$.W9$ XX?$ ./4#*0$ LBNM# K&"=&7$ 98,7&004)$ VW?$./4#*0$ L+!M# W==$?i$f$ g7&"8/:&$ `>,,7&004)$ %U?$./4#*0$ L(M# W==$P4O;#$ 9=4)O$ jQ;7>O;,>#$kO>7&0$"7&$/"0&=$ X"d2&$R#;&7)&#$ %T?$./4#*0$ LB(M# Q;7>O;,>#$ >,)$8"T48>8$8=>:"d)$4)$"$ @D*FJ$.KA$5;"))&:$67$DL$/H#&$ 67"8&$04A&03$9","54#H$(4::$/&$:&00$ %>>$./4#*0$ MT^9E*`Q.B$ 67$08"::&7$5;"))&:0$")=*7$ :"7O&7$67"8&$04A&03$ EJJ$ E@J$ LJJ$ L@J$ @JJ$ @@J$ DJJ$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$B@$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 29. Co-Channel link capacity doubling >>??$ ./4#*0$ LBOOM# W==$9c9;"))&:$ ^,&7"d)$(4#;$hg9$ EJJ$ LJJ$ @JJ$ DJJ$ CJJ$ FJJ$ NJJ$ BJJJ$ BBJJ$ BMJJ$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$ ./4#*0$BD$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 30. Getting even more wireless capacity •  Diverse path network topologies (rings/mesh) •  Lightly licensed and license free 60-90 GHz Millimeter wave bands •  Payload compression •  Higher order modulation schemes >256QAM •  Multi-carrier operation •  Multiple-in/Multiple-out (MIMO) techniquesBC$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 31. Don’t let fiber break the bank! •  Fiber is not the only answer for operators deploying HSPA+ & LTE •  Operators need to balance realistic capacity expectations with total cost •  Microwave transport meets the foreseeable capacity needs for mobile backhaul for several years to comeBF$ W[WQ$XRQ]^%_`$$$$$a$ VWX+W%Y$BEQKZ$MJBB$
  • 32. WWW.AVIATNETWORKS.COM
  • 33. Audience Poll #1 How realistic are the current LTE user throughput expectations? %BROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 34. Audience Poll #2In the next 5 years, what proportion of new HSPA + and LTE cellsites will be connected by fiber? % % % %BROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 35. About 4Ggear: The 4G Equipment Analysis ServiceBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com
  • 36. Contact Information 410 rue des Recollets, Suite 301 Montreal, QC, H2Y 1W2 CANADA (305) 992-3196 (514) 313-5465 info@maravedis-bwa.com www.maravedis-bwa.comBROADBAND WIRELESS INTELLIGENCE © Copyright All Rights Reserved 2011 Maravedis Inc.www.maravedis-bwa.com