LTE-Advanced Carrier Aggregation Optimization

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  1. 1. Nokia Networks white paper LTE-Advanced Carrier Aggregation Optimization LTE-Advanced Carrier Aggregation Optimization Nokia Networks
  2. 2. Page 2 networks.nokia.com Contents Introduction 3 Carrier Aggregation in live networks 4 5 9 FDD and TDD aggregation 10 Carrier aggregation in Heterogeneous Networks 10 11 Aggregation with unlicensed frequencies 12 12 Evolution of Carrier Aggregation 14 15 Further reading 15 Innovation is happening right now at Nokia
  3. 3. Page 3 networks.nokia.com 2012 2013 150 Mbps 20 MHz 2x2 MIMO 150 Mbps 10+10 MHz 2x2 MIMO 2014 2015 300 Mbps 20+20 MHz 2x2 MIMO 450 Mbps 3CA 2x2 MIMO 1 Gbps+ 100 MHz and/ or 4x4 600 Mbps 4CA 2x2 MIMO Cat 4 Cat 6 Cat 9 Cat 4 Cat 11/12 2016 Introduction
  4. 4. Page 4 networks.nokia.com Average throughput 0 10 20 30 40 50 60 70 Mbps Pcell Scell CA Carrier Aggregation in live networks Cat 6 UE peak data rates 0 50 100 150 200 250 300 350 Mbps 20 MHz 20+10 MHz 20+20 MHz
  5. 5. Page 5 networks.nokia.com aggregation is activated, as load balancing happens as part of the 20 + 20 MHz in the eld 300 Mbps
  6. 6. Page 6 networks.nokia.com 1800 2100 3500 700 2600 900 5400 800 2300 1400 3.5 GHz in small cells or macro cells with aggregation 700 2600 MHz aggregated into single pool 5 GHz unlicensed band in small cells continuous line shows the user data rates when carrier aggregation 200 150 100 50 0 20 30 40 50 60 70 Carrier aggregation Load balancing, no CA O ered load (Mbps) UEthroughput(Mbps) +40% more users with the same data rate +80% higher user data rate
  7. 7. Page 7 networks.nokia.com 0 20 40 60 80 100 Mbps Pcell SCell Sum CA UE Non-CA UE devices and so fair resource sharing between these devices needs to
  8. 8. Page 8 networks.nokia.com User movement Primary carrier Secondary carrier 1 4 3 2 CA activation based on data volume Channel quality-based recon guration SCell swap Deactivation due to inactivity 1 2 3 4
  9. 9. Page 9 networks.nokia.com LTE 1800 LTE 800 Uplink Uplink Downlink Downlink -120 dBm -130 dBm band Scell can contribute to the throughput at lower signal levels
  10. 10. Page 10 networks.nokia.com FDD and TDD aggregation Carrier aggregation in Heterogeneous Networks 3500 Low band + Low band 3500 Release 12 inter-site carrier aggregation between macro and small cell Macro cell Small cell Macro cell Release 10 carrier aggregation in macro cell X2 Low band 3500 Release 10 inter-site carrier aggregation between macro and low power RF head Low power RRH Macro cell Fiber
  11. 11. Page 11 networks.nokia.com Aggregation with supplemental downlink Downlink aggregation Downlink + uplink Supplemental downlink
  12. 12. Page 12 networks.nokia.com Aggregation with unlicensed frequencies The solution uses carrier aggregation between the operators licensed The licensed band can provide a reliable connection both in uplink and both licensed and unlicensed bands, and undertake fast load balancing Device power consumption optimization Downlink aggregation Licensed downlink + uplink Unlicensed 5 GHz band
  13. 13. Page 13 networks.nokia.com Power consumption 0 100 200 300 400 500 600 700 mA 10 MHz no CA 20 MHz no CA 10+10 MHz CA 800 900 1000 Active transmission Average over 185s Large le transfer Power (mW) Time (s) With CA Without CA
  14. 14. Page 14 networks.nokia.com Evolution of Carrier Aggregation
  15. 15. Page 15 networks.nokia.com Summary rate has increased to 300 Mbps during 2014 and will hit 450 Mbps Further reading LTE-Advanced white paper LTE-U white paper FDD-TDD Carrier Aggregation press release Three-band Carrier Aggregation press release d LTE-Advanced Carrier Aggregation video
  16. 16. networks.nokia.com Nokia FI-02022 Finland Karaportti 3, Finland Nokia Solutions and Networks 2015

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