Massive MIMO for the New Radio Overview and Performance Dr. - PowerPoint PPT Presentation

Massive MIMO for the New Radio – Overview and Performance Dr. Amitabha Ghosh Nokia Bell Labs IEEE 5G Summit June 5 th , 2017 5G-<Ghosh>

What is “Massive MIMO” ANTENNA ARRAYS Enhance Coverage large number (>>8) of High gain adaptive controllable antennas beamforming ANTENNA SIGNALS adaptable by the Benefits physical layer Enhance Capacity Not limited High order spatial to a particular multiplexing implementation 5G-<Ghosh>

Massive MIMO: Why now? Capacity Coverage T echnology 3GPP spec requirements requirements capability support Most macro Below 6GHz: Active Antennas 3GPP: networks will Deploy LTE/NR on are becoming LTE: Rel-13/14 become congested site grids sized for technically and NR: Rel-15 lower carrier commercially frequencies feasible Spectrum < 3GHz Above 6GHz Massive MIMO 3GPP-New-Radio will be a “beam - and base sites will Large bandwidths requires Active based” air interface run out of capacity but poor path loss Antenna technology by 2020 conditions 5G-<Ghosh>

Evolution to Active Antenna Systems Conventional Remote Radio Active Antenna base station Head (RRH) System (AAS) Reduced footprint and more efficient delivery of power 5G-<Ghosh>

MIMO in 3GPP 5G-<Ghosh>

Higher efficiency with Massive MIMO (full dimension MIMO / 3D MIMO) 16x2  2.5x gain over 2x2 Average spectral efficiency evolution 64x2  3.0x gain over 2x2 64x2  +50% gain over 8x2 4 columns of (8) XPOL antennas for 8TX - 64TX (2) (1) Column-1 Column-2 Column-3 Column-4 16 TXRUs 16 TXRUs 16 TXRUs 16 TXRUs 5G-<Ghosh>

Massive MIMO field performance: TD-LTE 2600 UE1 UE2 UE3 UE4 UE5 UE6 MU-MIMO OFF PRB Utilization (SU) MU-MIMO ON UE1 UE2 UE3 UE4 UE5 UE6 PRB Utilization (MU) High-order multi-user spatial multiplexing 5G-<Ghosh>

Massive MIMO at Higher Carrier Frequencies (>>6 GHz) Poor path loss Cost & power Antenna array Beam based conditions consumption implementation air interface Large number of Full digital solutions Smaller form Single sector-wide antennas needed to require transceiver factors beam may not overcome poor units behind all provide adequate path loss elements Distributed PA coverage solutions Obtaining channel Wide bandwidths:  Beamform all  Hybrid arrays knowledge per A/D and D/A channels! element is difficult converters are very Beamforming at RF power hungry with baseband digital Precoding 5G-<Ghosh>

Massive MIMO in 3GPP New Radio – beam based air interface Beamformed control channels Beam management Cell 1 Cell 2 PSS 2 PSS 1 SSS 2 SSS 1 PCI 2 PCI 1 TRP1 (Cell 1 ) TRP1 (Cell 2 ) BRS#0 BRS#0 BRS#1 BRS#1 BRS#2 TRP2 (Cell 1 ) BRS#2 BRS#3 PSS 1 SSS 1 BRS#3 PCI 1 Beam scanning TRP2 (Cell 2 ) PSS 2 SSS 2 PCI 2 Acquisition and maintenance of a set of beams for TX and RX at base and UE CoMP is built in 5G-<Ghosh>

Control Channel Coverage – LTE vs NR Coverage performance when deploying a CDF of downlink control channel 3.5GHz system on a site grid sized for SINR 800MHz 10˚ LTE downtilt 2-port 8 SFBC LTE (800MHz 1 & 3.5GHz) NR (3.5GHz) NR Grid-of- Beams 2-port 8 SFBC 4 5G-<Ghosh>

Massive MIMO in 3GPP New Radio - advanced CSI Type II Linear Combination Codebooks in NR promise to provide significant gains over the Rel-14 LTE codebooks for the same array size Performance of NR CB Gain in mean UE Gain in cell edge throughput over LTE Rel-14 CB * throughput Full buffer traffic 18% 15% Bursty traffic 33% 65% * LTE: Rel-14, 16-port CB with 2 beams per polarization NR: Candidate Type II 16-port CB with 4 beams per polarization and sub-band scaling 5G-<Ghosh>

3GPP New Radio at mmWave Large spatial multiplexing gains at 30GHz with multi-panel hybrid arrays Four-panel TRP: 256 elements SU-MIMO 4  ~60% from leveraging high- 4 rank single-user MIMO 8 TXRUs 8 8 transmission Four-panel UE: 128 elements MU-MIMO 4  ~20%-50% from multi-user 4 MIMO transmission 8 TXRUs 4 4 5G-<Ghosh>

Early 5G use case: Extreme broadband to the home The last 200m vRAN & EPC 5G-<Ghosh>

Massive MIMO for the new radio Summary Massive MIMO is Massive MIMO Massive MIMO in being deployed will improve 3GPP New Radio today coverage and promises large capacity gains in current LTE bands and over massive MIMO in also in newly-allocated LTE sub-6GHz, cmWave, and mmWave bands 5G-<Ghosh>

5G-<Ghosh>