A Survey on Key Technology Trends for 5G Networks
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The document discusses key technology trends for 5G networks, including higher spectrum usage through technologies like carrier aggregation and operation in millimeter wave bands. It also covers multi-Gbps transmission rates using new waveforms, massive MIMO arrays, and highly dense and flexible network architectures utilizing small cells and network function virtualization. The conclusion is that 5G networks will be driven by data traffic growth and enable ubiquitous services, but further work is still needed to support innovative services in both urban and rural areas.
A Survey on Key Technology Trends for 5G Networks
- 1. A Survey on Key Technology Trends for 5G Networks Dr. Fabrício Lira Figueiredo Wireless Technologies Division Manager, CPqD
- 2. Agenda 1.Cellular Networks Future Scenario 2.5G Roadmap 3.Potential Requirements for 5G Networks 4.Key technology Trends for 5G Networks 5.Conclusion
- 3. Market Forecast for Mobile Technologies Source: GSMA, 2014
- 4. Global Mobile Technologies Forecast Source: 4G Americas Revenues will grow slowly Costs must be optimized !
- 5. 5G Expected Timeline 5G Research, Initiatives and Partnerships 5G Standardization 5G Product Technology 5G Commercial Deployment ITU WRC IMT-2020 (5G) 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2022 Rel-12 Rel-13 Rel-14
- 6. Main 5G Global Initiatives 13 Projects METIS 5GPPP 5GNOW COMBO iJOIN MAMMOET MCN MOTO PHYLAWS TROPIC Celtic-Plus 5GrEEn 5GIC 15 Projects SWARM BWRC BWAC CWSA ChoiceNet ISRA MobilityFirst NDN NEBULA CIF CNS NSF EDWN NSF 60G NYU-Poli Calit2 4 Projects MOST NDRC 5G Forum 2020 and Beyond Source: 4G Americas
- 7. Potential Requirements for 5G Networks Capacity •1000x rise in traffic Peak Data Rate •5 - 10 Gbps (DL) Cell Edge User Data Rate • 1 Gbps (DL) / 0.5 Gbps (UL) Spectral Efficiency •10 bps/Hz (DL) Latency •User Plane: 1 ms / Control Plane: 50 ms Spectrum Usage •Millimeter wave and Unlicensed Bands Mobility •Max speed: > 350 km/h •Handoff switch time < 10 ms Reliability •99.999% reliability for short packets Scalability •10x - 100x increase in the number of devices per sector Network Flexibility •Multi-RAT architecture •NFV, SDN, reconfigurable core network
- 8. Key Technology Trends for 5G Networks 5G Requirements Multi-Gbps Transmission Rate Highly Flexible Architecture Large Scale MTC Higher Spectrum Usage Highly Dense Networks
- 9. Key Technology Trends for 5G Networks •Device-to-Device Communication (D2D) •Very low power consumption operation modes •Multi-RAT Integration and Management •Advanced Multiple Access Schemes •Optimized operation in lower bands (sub-1GHz) •Massive MIMO •Millimeter Waves •New Waveforms Large Scale MTC Higher Spectrum Usage •Carrier Aggregation •Operation on Unlicensed Bands •Operation on Millimeter Wave Bands •Cognitive Radio Multi-Gbps Transmission Rate Highly Dense Networks •Advanced Small Cells •Advanced Inter-node Coordination •Self Organizing Networks •Wireless Backhaul/Access Integration Highly Flexible Architecture •Context Aware Networking •Software Defined Networks •Network Function Virtualization •Moving Networks
- 11. Millimeter Wave for Mobile Access Networks
- 12. Unlicensed LTE 5.4-5.8 GHz < 3.5 GHz < 3.5 GHz Licensed DL Unlicensed DL Licensed UL Only Data Data + Control Approved Study-Item for Release 13 in 3GPP Data + Control Proposal: Carrier Aggregation of Licensed and Unlicensed Bands
- 13. Coexistence with Wi-Fi Dynamic channel selection based on interference Mitigation strategy in worse case scenario: no clear-channel available Opportunistic use: fall back to licensed spectrum operation
- 15. Candidate 5G Waveforms Filter Bank Multicarrier (FBMC) •No significant side lobes •Increased spectral efficiency due to: - no cyclic prefix - minimum guard band Source: Nicolas Cassiau, Dimitri Kténas, Jean Baptiste Doré, “Time and frequency synchronization for CoMP with FBMC”, Tenth International Symposium on Wireless Communication Systems (ISWCS’13), Ilmenau, Germany, August, 2013
- 16. Candidate 5G Waveforms Generalized Frequency Division Multiplexing (GFDM) •Low out of band emission •Increased spectral efficiency •Flexible configuration Source: Fetweiss et al, “5G Now Project”
- 17. Candidate Waveforms Universal Filtered Multicarrier (UFMC) •Supports non-contiguous sub-bands •Low latency due to short filter lengths Source: V. Vakilian, T. Wild, F. Schaich, S.t. Brink, J.-F. Frigon, "Universal-Filtered Multi- Carrier Technique for Wireless Systems Beyond LTE", IEEE Globecom'13, Atlanta, December 2013
- 18. New Waveforms Comparison Figure of Merit CP-OFDM FBMC GFDM UFMC PAPR High High Moderate High Spectral Efficiency Low High High High Overhead High Low Variable Low OOB Emissions High Negligible Reduced Reduced Computacional Complexity Low High High High Equalization Simple Involved Moderate Involved Resource Allocation Dynamic and fine grained Configurable Configurable Configurable Short-burst Traffic No No Yes Yes Fragmented Spectrum No Yes Yes Yes L1 Latency High High Moderate Low Conclusion: no candidate waveform outperforms CP-OFDM in all aspects …
- 19. Massive MIMO Arrays with up to hundreds of elements Typical operation in higher frequencies (>10 GHz) Higher capacity can be achieved with enough elements Source: T. L. Marzetta, “Noncooperative cellular wireless with unlimited numbers of base station antennas,” IEEE Trans. Wireless Commun., Nov. 2010.
- 20. Massive MIMO Challenges Mutual antenna coupling RF propagation models Complex RF hardware design Channel estimation (FDD) Pilot contamination Complex RF and Antenna Design => High Cost !
- 21. Highly Dense and Flexible Networks
- 23. Large Scale HetNets Deployment EPC/IMS Self-Organizing Networks Advanced Interference Coordination Multi-RAT Integration Flexible Core Network and Backhaul NFV & SDN RAN-Sharing SON Controller Wi-Fi Wi-Fi RAN-Sharing EPC/NFV/SDN SON Controller Operator A Operator B LTE LTE LTE LTE LTE LTE Wi-Fi
- 24. Flexible Backhaul MmWave P2P/Mesh Backhaul In-Band Backhaul Street-Level Architecture Flexible Backhaul RAN-Sharing
- 25. Large Scale MTC
- 26. MTC: Multiple Applications and Services
- 27. Impacts on 4G Network Architecture MTC- IWF: MTC InterWorking Function - Required for authentication and secure connection to MTC Server - Selects the better operation mode based on the connection condition to the UE
- 28. MTC Features for Rel-13 •75% modem complexity reduction compared to Cat-1 UE •Adopting channel bandwidth of 1.4 MHz •10+ years battery lifetime for cases not addressed by Rel-12 •15-20 dB coverage enhancement New Power Save Mode (PSM)
- 29. Device-to-Device (D2D) UE1 UE2 UE1 UE2 UE1 UE2 UE1 UE2 Scenario 1A: Scenario 1B: Scenario 1C: Scenario 1D: Scenarios UE1 UE2 1A: Out-of-Coverage Out-of-Coverage Out-of-Coverage 1B: Partial-Coverage In-Coverage Out-of-Coverage 1C: In-Coverage-Single-Cell In-Coverage In-Coverage 1D: In-Coverage-Multi-Cell In-Coverage In-Coverage PC5 PC5 PC5 PC5
- 30. Coverage Optimization Band 28 (698 – 806 MHz) 698 MHz Downlink Uplink Guard Band Guard Band Guard Band 5 MHz 10 MHz 3 MHz 45 MHz 45 MHz 703MHz 748MHz 758MHz 803MHz 806MHz SLP, SLE SLMP SMP, STFC and SCM SARC SLP, SLE SLMP 7 MHz (uplink) 7 MHz (downlink) 451 458 461 468 450 MHz 451 458 459 460 461 468 469 470 1 MHz 7 MHz 7 MHz 1 MHz 1 MHz 1 MHz 1 MHz 1 MHz SMP, STFC and SCM SLP Airports SLP Airports SARC Band 31 (450 – 470 MHz) Sub-1 GHz Bands
- 31. Case: LTE 450 MHz Trial Location: Sobradinho-DF / Brazil Date: April-2014 38 km DL: 14 Mbps eNodeB
- 32. Conclusion 1.The evolution to 5G networks will be driven by the data traffic growth rate until 2020 2.Research initiatives in 5G networks are increasing all over the world 3.Proposals for 5G technical requirements are under discussion by academia, vendors and operators 4.Some technology trends are becoming key enablers for 5G networks 5.Ubiquitous services can become reality in 5G, but further efforts are required for supporting innovative services in urban AND rural areas
- 33. Thank you! www.cpqd.com.br Fabrício Lira Figueiredo fabricio@cpqd.com.br +55 19 9838-2308 Ministério das Comunicações Special acknowledgement to Brazilian Commmunications Ministry, FUNTTEL and FINEP for the funding and strategic contributions to all CPqD LTE Projects.