Day 2-t8-1730 chalkiotis-konstantinos-20120524


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LTE World Summit Barcelona May 2012 Day 2

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Day 2-t8-1730 chalkiotis-konstantinos-20120524

  1. 1. Overcoming the challenge of providing LTE over extensive land masses Dr. Konstantinos Halkiotis, Principal Engineer Access & Transmission Network Dept. Cosmote S.A. May 24th, 2012 GROUP
  2. 2. Contents• Company Profile• Choosing the right frequency for the geography. Will 1.8GHz ever be the universal frequency of choice?• Countries that have access to 1800 MHZ spectrum will they use it for LTE?• Device Availability for LTE• Evaluating Cosmotes LTE trial – what is the behaviour of the network when providing LTE to island territories?• Conclusions A pioneer & market leader on all fronts
  3. 3. Company Profile Presentation1996: Cosmote was founded from Greek PTT (OTE)1998: Commercial Operation for GSM network2001: Cosmote becomes the Leader Mobile Operator in Greece2004: UMTS network Commercial Launch (June 2004)2004: UMTS Services during 2004 Summer Olympics in Athens (1st operatorworldwide who provided UMTS services in Olympics)2006: HSDPA commercial Launch (June 2006)2006: Commercial Launch of Globul’s UMTS/HSPA network2007: HSPA Phase 2 (March 2007)2008: HSPA Phase 3 (7,2 Mbps DL, 1,45 Mbps UL)2009: HSPA+ introduction (21,6 Mbps DL, 5,76 Mbps UL)2011: HSPA+ phase 3 (42,2 Mbps, 11,5 Mbps UL)2011: LTE trial network in urban and rural areas A pioneer & market leader on all fronts
  4. 4. Cosmote’s Group GSM/GPRS NetworksCosmote Group provides GSM services in: • Greece (Cosmote) (in operation since 1998) • Albania (AMC) (in operation from 2001) • Bulgaria (Globul) (in operation from 2001) and • Romania (Cosmote Romania) (in operation from 2005)Cosmote Group has more than 22 million customersCosmote Group UMTS Networks• Cosmote provides UMTS services in Greece (since 2004), Bulgaria (Globul) since 2006 and Romania (since 2010).• Cosmote Group provided HSPA+ services in Greece (42 Mbps DL / 11,6 Mbps UL) and Bulgaria (42 Mbps UL / 5,76 Mbps DL).• Cosmote Group is providing UMTS services (including HSPA+) in Romania since 2010
  5. 5. Spectrum remain the main industry bottleneck Frequency risks and opportunities European FDD bands for mobile use further bands like 450 MHzBand Bandwidth currently not considered in 3GPP standardisation2600 2 x 70 MHz capacity2100 2 x 60 MHz bands (2 x 205 MHz)1800 2 x 75 MHz 2 x 35 MHz coverage 900 bands 2 x 30 MHz (2 x 65 MHz) 800•Network deployments are highly dependent on national spectrum auctions•Opportunities in re-farming become more attractive – e.g. 1800MHz as best compromisebetween coverage and capacity to rollout Broadband technologies (LTE or HSPA dependingon local situation)•An initiative currently supported by•Global band for LTE is needed (Digital Dividend 2?)
  6. 6. Coverage vs Capacity Spectrum Bands for LTE 3GPP Standardized European FDD bands Available Spectrum 800 MHz 2 x 30 MHz Coverage bands 900 MHz 2 x 35 MHz 1800 MHZ 2 x 75 MHz 2100 MHz 2 x 60 MHz Capacity bands 2600 MHz 2 x 70 MHz1800 MHz seems to be the most suitable band for LTE technology interms of coverage and capacityPlenty of 1800 MHz spectrum in Europe is not awarded to operatorsBands below 1GHz has been standardized mainly as coverage bands inrural areasIs there any possibility to offer coverage over seas and islandsby using alternative bands (e.g. 1800MHz)?
  7. 7. Will 1.8GHz ever be the universal frequency of choice?Mobile Operators are currently running 1800 MHz band as GSM capacity Layer
  8. 8. Can operators move traffic out of 1800 MHz band and use it for LTE instead? Operators could move traffic from 1800 MHz to 900 MHz by investing CAPEX and additionally use special features (AMR HR, VAMOS, OSC) in order to increase capacity while at the same time reduce 1800 spectrum usage New GSM network design required. MSR/SDR radio technology could assist to smooth transition towards LTERefarming is essential in order to use 1800 MHz spectrum for LTEIn addition 1800 MHz spectrum not awarded should be awarded to mobile operators immediately
  9. 9. Is the 800 MHz spectrum much better than 1800 MHz in rural areas? Link budget calculations shows that LTE 800 MHz have 4-5 dB improved coverage compared to LTE 1800 MHz LTE 800 Linkbudget LTE 1800 LinkbudgetGeneral GeneralFrequency Band MHz 800 Frequency Band MHz 1800Channel Bandwith MHz 10 Channel Bandwith MHz 10available ressource blocks value 50 available ressource blocks value 50Uplink DownlinkAntenna Configuration 1T2R-RXDivAntenna Configuration 2T2R-TXDiv Uplink DownlinkNetwork Load % 50 % Network Load % 50 % Antenna Configuration 1T2R-RXDivAntenna Configuration 2T2R-TXDivCarrier Frequency MHz 850Carrier Frequency MHz 810 Network Load % 50 % Network Load % 50 % Carrier Frequency MHz 1750Carrier Frequency MHz 1845Desired User datarate Desired User Datarate(RLC) kbps 2048(RLC) kbps 4000 Desired User datarate Desired User DatarateProtocol overhead % 14%Protocol overhead % 21% (RLC) kbps 2048(RLC) kbps 4000L1 datarate kbps 2389L1 datarate kbps 5091 Max pathloss Max pathlossMax pathloss unloaded dBm 130,5Max pathloss unloaded dBm 153,1 unloaded dBm 135,5unloaded dBm 157,1Interference Margin dB 1,8Interference Margin dB 9,5 Interference Margin dB 1,8Interference Margin dB 9,5Max Isotropic pathloss dB 128,7Max Isotropic pathloss dB 143,5 Max IsotropicBody loss dB 1,0Body loss dB 1,0 Max Isotropic pathloss dB 133,7pathloss dB 147,5 Body loss dB 1,0Body loss dB 1,0Dense Urban Dense Urban Dense Urban Dense Urban Cell radiuskm 0,12 Cell radiuskm 0,34 Cell radiuskm 0,09 Cell radiuskm 0,20 intersite distancekm 0,21 intersite distancekm 0,59 intersite distancekm 0,15 intersite distancekm 0,35Urban Urban Urban Urban Cell radiuskm 0,20 Cell radiuskm 0,58 Cell radiuskm 0,14 Cell radiuskm 0,34 intersite distancekm 0,35 intersite distancekm 1,00 intersite distancekm 0,25 intersite distancekm 0,59Suburban Suburban Suburban Suburban Cell radiuskm 0,56 Cell radiuskm 1,61 Cell radiuskm 0,46 Cell radiuskm 1,10 intersite distancekm 0,97 intersite distancekm 2,78 intersite distancekm 0,79 intersite distancekm 1,90Rural Rural Rural Rural Cell radiuskm 2,81 Cell radiuskm 8,15 Cell radiuskm 2,54 Cell radiuskm 6,20 intersite distancekm 4,87 intersite distancekm 14,11 intersite distancekm 4,40 intersite distancekm 10,74
  10. 10. Is the 1800 MHz spectrum much better than 2.6 GHz in rural areas?Link budget calculations and actual measurements shows that LTE 1800 MHzhave 3-4 dB improved coverage compared to LTE 2600 MHz LTE 1800MHz LTE 2600MHz
  11. 11. Which is the most appropriate spectrum band to cover rural areas with LTE? LTE 800MHz LTE 1800MHz LTE 2600MHzPros: Pros: Pros: •Antenna system readiness •New frequency band and no•Better propagation due to •Reuse of power amplifiers interference is expectedlower frequency (in case of Single RAN) •Terminals already available •Terminals already availableCons: •Network grid already Cons: deployed (as GSM layer) •Coverage will be reduced•New network layer needed •Bands seems promising on compared to 800 and 1800(antennas, enode Bs, etc.) providing Rural LTE coverage MHz bands•Smart phones will not •New antenna systems aresupport this frequency band neededin the early stage Cons: •Huge CAPEX and OPEX•Interference controlling is •Refarming in GSM layer is investments in infrastructuredifficult needed to provide rural coverage•Capacity per cell will be •Coverage will be reduced •Poor indoor coveragelimited (bigger cells – more compared to 800 MHz layerusers) •Possible interference with GSM needed to be controlled
  12. 12. Device Availability for LTELTE terminals operating at 1800MHZ and 2600 MHz are already in the market •USB sticks (Already Available)•Smart phones (expected late 2012 – early 2013)
  13. 13. Evaluating Cosmotes LTE trial – what is the behaviourof the network when providing LTE to island territories? Cosmote LTE Trial was deployed in 1800 MHz and 2600 MHz bands in order to evaluate the ability providing LTE coverage over sea and island territories Cosmote Group in Cooperation with Deutsche Telekom and Huawei launched LTE trial at 2600 and 1800 MHz, evaluating Extended cell functionality (LTE coverage over 60 km evaluated)
  14. 14. Cosmote LTE Trial Network Architecture Core Site Application Servers in LAB LTE Radio Sites Core Site Evolved Packet Core VOD FTP/HTTP EUTRAN MME S6a COSMOTE IP S10 HSS Backbone S1-MME LTE S11 Core Site eNodeB S1-U SGi IP Microwave S5/S8 Connectivity S-GWLTE UE PDN GW Control plane Internet User planeSupplier Equipment Test Spectrum Trial Devices Max Bandwidth : 10 - 20MHz Huawei E398 Radio Sites (eRAN 2.0): Spectrum Band : 2,6 GHz DBS3900 (V100R001C01SPC210) 1.8GHz Evolved Packet Core (SAE 1.1): MME: USN9810 (V900R001C02SPC102) S-GW&PDN-GW: UGW9811 (V900R001ENGC02SPC200) HSS: SAE-HSS9812 (V900R006C01SPC100) Application Servers IP Microwaves
  15. 15. Live Trial Results from Cosmote’s LTE 1800 -2600 MHz trialField trial was taken place in rural site shooting over the sea(Corinthian Gulf) (extended cell functionality testing) and someisland territoriesAlso coverage over the land was tested (due to the geographyof the area)
  16. 16. LTE 1800 MHz Extended Cell Scope:To examine the possibility to achieve a bit rate >100 Mbps at a distance at least 100km from the e-NodeB. Site chosen shooting over the sea at elevation 1332m
  17. 17. LTE 1800 MHz Extended CellChannel Bandwidth Distance DL UL Latency (ms) (km) Throughput Throughput (Mbps) (Mbps) 20 MHz 102 135 59 11 10 MHz 102 71 29 10 5 MHz 102 29,1 14,6 10
  18. 18. LTE 2600 MHz Extended CellChannel Bandwidth Distance DL UL Latency (ms) (km) Throughput Throughput (Mbps) (Mbps) 20 MHz 102 12,56 3,65 11 10 MHz 102 7,17 2,3 12 5 MHz 102 2,85 1,45 12
  19. 19. GSM 1800 MHz / LTE 1800 MHz Lab Tests
  20. 20. Conclusions Compared to other tested bands (2600 MHz) 1800 MHz band seems to be the most appropriate for mobile LTE Effort is needed to move existing GSM traffic in order to free spectrum for LTE LTE can support services even in large distances (over sea and islands) Technology is ready for commercial service LTE could provide coverage over seas andislands by the appropriate design and frequency selection
  21. 21. THANK YOU FOR YOUR ATTENTIONContact Information:Dr. Konstantinos HalkiotisAccess & Transmission Netw. Dept.Kifisias 95-97, 15124, Athens,GreeceE-mail: kchalkiot@cosmote.grTel. +302106374640