reality check – macrocells, small cells and lte … check – macrocells, small cells and lte...
TRANSCRIPT
Reality Check – Macrocells, Small Cells and LTE Advanced Antenna Systems 2014 November 6, 2014 Las Vegas, NV Keith Radousky CTO – Americas
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Discussion Points and Presentations • Wireless Subscribers Ravenous for More Bits!
• More Spectrum Coming – 600MHz, AWS-3, ??
• TOWERS ARE OVERLOADED
• Carriers are Scrambling to Add Capacity
• Deploying Small Cells/DAS vs. Increasing Macrocell Capacity
• Quintel Overview – MultiServ and SONWAv Antennas
• LTE Advanced - 2Tx-2Rx to 8Tx-8Rx
• Active, Integrated and Passive Antennas
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
The Capacity Crunch
• The Capacity crunch • We are all aware of it • By 2025 there may be 50x, 500x increase?
• How is it solved?
– More Spectrum (~3x increase by 2025) – More Spectral Efficient access tech (~3x increase by
2025) – More Spectral re-use/denser topologies (~?x increase) – Pricing mechanisms
• Small Cells are the acknowledged answer in the
form of DAS, Femtos, Picos, etc and part of a HetNet.
• But the Macro Layer won’t be replaced by Small Cell Layer, so how can the Macro layer evolve and be prepared for the Capacity crunch?
Source: Verizon
How do we close the gap?
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
• Privately held spin out from QinetiQ UK (formerly the UK Defence Research Agency)
• Over 100 patents globally
• HQ in Rochester, NY, USA
• Additional R&D centre in California, and sales offices in UK (EMEA) and Mumbai
• Shipping innovative product for over 5 years with 6 operators and 3 continents
MultiServTM Product Family
Multiband/Multi-Port Antenna Products
SONWavTM Product Family Passive Beamforming Antenna Products
Space Efficient Mast Solutions
PIM Efficient Solutions
Spectrally Efficient Mast Solutions
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Band UBB 6-Port
UBB 8-Port
UBB 12-Port
700
2 2 2
850 2 2
1900
4 4
4
AWS
4 WCS
8 Port Available
UBB 8-Port QSx658-3
12 Port Q2’15
UBB 12-Port QSx6512-3
MultiServTM 6Port, 8Port &12 Port Summary
6 Port Available
UBB 6-Port QSx658-3
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
TODAY - Two Antenna/Sector Sites – Add LTE 2T4R 700/AWS 2G/3G Independent Tilt with Spatial/Polar Diversity
Tx/R
x
Tx/R
x
Tx/R
x
UMTS850
UMTS1900
Tx/R
x
Tx/R
x
Tx/R
x
Tx/R
x
GSM1900 GSM850
19 19 8 8
19 19 8 8
Fiber
LTE 700 LTE AWS
8 19 8 19
8 19 8 19
Tx/R
x
QS6658-1 Tilt per Band 700/AWS Tilt per Pol 850/1900
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Vendor 2 750MHz
Vendor 1 750MHz
C/I 25dB
-1dB
Overlap regions causes reduced C/I
C/I when deployed on 7x sites
SPR is a crude indicator of spectral efficiency.
Another metric is to compute the C/I as a function of Az angle assuming a tri-sector arrangement, where the I is the inter-sector interference.
Next step is to deploy multiple sites in a cluster, compute the C/I over an area (as a planning tool would), and then correlate this with Downlink throughputs, since C/I and Tput are related, and derive an average Tput value. We could achieve >20% gains in Capacity over other Multi-port antennas at Lowband.
Quintel 750MHz
Market Leader: Sector Power Ratio (SPR) Lowband
Undesired
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
How Quintel QTiltTM Technology Works
19 A
19 A
Qui
ntel
Cor
pora
te F
eed
Net
wor
k (+
45o )
AWS PCS Tx
/Rx
Tx/R
x
+45 PCS
+45 AWS
Quintel VET Principle (2x Tilts)
PCS AWS
Pow
er D
ivid
ing
Net
wor
k
Actuator
Base Station
Standard VET Antenna
Tx/R
x
Phase slope across array (–θ to +θ )
Max Tilt
Min Tilt Mid Tilt
Phase slope across array (–θ to +θ )
Single Phase Difference (–φ to +φ )
Qui
ntel
Cor
pora
te F
eed
Net
wor
k (+
45o )
Tx/R
x
Quintel VET Principle
Max Tilt
Min Tilt Mid Tilt
Base Station
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
X-Polar SONWavTM
4Rx Uplink Solutions
2 Antennas/Arrays Quintel 1 Antenna/Array Azmuthal Beamsteering Elevation Beamsteering
CLA-2X 4-Port
Antenna
Tx Pattern
Adaptive (per UE) Rx Patterns
4x Rx Branches at Baseband MRC or IRC (per user)
Σ Tx
/Rx
2T4R
Rx
Tx/R
x R
x
Tx Pattern
Adaptive (per UE) Rx Patterns
Σ
4x Rx Branches at Baseband MRC or IRC (per user)
Logically Equivalent
Tx/R
x
2T4R
Rx
Tx/R
x R
x
Crude Azimuthal Beamforming Elevation Beamforming (Tilting)
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Qui
ntel
Cor
pora
te F
eed
Net
wor
k (+
45o )
Cor
pora
te F
eed
N
etw
orks
Qui
ntel
Cor
pora
te F
eed
Net
wor
k (-4
5o )
LTE (R9+) 4T4R
+45A +45B -45A -45B
Beamforming in Elevation across each A&B ports
Spatial Multiplexing up to Rank 2 across +45 and -45 BF pairs
Dynamic Beamform/Tilting for LTE
Interference
UE
A Solution for Spectral Efficiency - SIMS SONWav - Adaptive Elevation Beamforming (Up & Downlink)
4T4R eNodeB (giving adaptive coherent
Beamforming)
0
10
20
30
40
50
60
0 100 200 300 400 500
LTE 2GHz/20MHz 2x2 Config Flat Earth 3x19 cell geometry
(25m Ht x 500m Cell Radii) Monte-Carlo Simulation
Mbps (y) vs. Dist in m (x) Blue – No Elevation BF
Red – With Elevation BF
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
First Operator Highband SONWav Trials Shows 30% Avg & 80% Cell Edge UL TP Gain
SONWav demonstrated ~30% increase in Uplink throughput gains
on average and ~80% cell edge gains
Rx
Rx
Tx/R
x
Tx/R
x
2T4R
X-Polar SONWav
Tx/R
x
Tx/R
x
2T2R
Single X-Polar
Array 2T2R
Same size antenna array AWS Band/10MHz LTE
North American Op
• AWS Band (2100/1700MHz) • Trial Sites ~28m and 30m Heights • Inter Site Distance ~1.1km • Two Sectors “facing each other” tested • LTE service tested
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Static UE Static UE Static UE
Static UE Static UE Static UE
Static UE
Second Operator Highband SONWav Trials (MU-MIMO) Shows 35% LTE Uplink Throughput gains
Static UE Static UE
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Second Operator Highband SONWav Trials (Inter-Cell Rejection) Shows 80% LTE Uplink Throughput gains at Cell Edges
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
4ft - QW4658-3 6ft - QW6658-3 8ft - QW8658-3
QWx658-3 Series • Same as MultiServTM 8-Port antennas but
Lowband plugs into 4-way radios (2T4R or 4T4R)
• Alternative 4-Port Lowband solutions too big • 3x Independent Tilts, as:
– 4x 698-894MHz Ports For 2T4R @700
– 4x 1695-2400MHz Ports For 4x4 MIMO
• The only Slimline 12” solution with 4xLB ports • 50% Spectral Efficiency Gains at Lowband • Significant rejection of interference, ideal for:
– Interference Limited environments – Tall Macro Sites/Short Inter-Site Distances
2x16
95-2
400
2x69
8-89
4 Tx
/RX
2x69
8-89
4 R
x/Tx
2x16
95-2
400
8-Po
rt
QW
x658
-3
2T4R
2T4R
No need to use these 4x Port options at Low-Band
……………………………………………..….
A Smarter antenna for 2T4R Lowband
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Test Cell
Test Cell
50% Gain
Drive Survey UE Uplink Throughput CDF of the Test Cell where: (a) No inter-cell interference present and using 2T2R X-Pol antenna (b) UE causing Inter-Cell interference and using 2T2R X-Pol antenna (c) UE causing Inter-Cell interference and using 2T4R SONWav antenna
Static location of the Interfering UE, camped onto an adjacent cell creating co-channel inter-cell interference into the Test Cell.
(Standard 2T2R X-Pol Antenna)
(With Quintel 2T4R SONWavTM Antenna)
Rx
Rx
Tx/R
x
Tx/R
x
2T4R
Tx/R
x
Tx/R
x
2T2R
1st Deployment at LTE700
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
2nd Trial at LTE700
2T2R Conventional 2T4R SONWav
No
Inte
rfer
ence
C
lose
-in 1
0MH
z w
ideb
and
Inte
rfer
ence
• 3x sectors, Sub-urban Macro Cellsite
• 2x10MHz LTE700,100ft, ISD ~ 2.5 miles
• eNB running MRC/IRC
• UE fully loaded, full buffer/all RB’s used, UDP traffic. Plots show UE Tput in the presence of…
• Top = No external interference • Bottom = Intentional interference
• When SONWav 4-way Rx enabled…
• RSSI counters improved markedly
• Uplink SINR, MCS and throughput statistics improved
• Resilience to co-channel interference demonstrated, either network generated or from external sources
• Throughput gains of up to 60% were observed
Interference sources
Uplink Throughput
Gains
Interference sources
Uplink Throughput
Gains
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
What is an Active Antenna??? D
istri
butio
n N
etw
ork
Distribution N
etwork
Integrated RRH/ Passive Antenna
Distributed Amplifiers
Distributed Transceivers with Sub-Array
Quintel C
orporate Feed Qui
ntel
Cor
pora
te F
eed
Distributed Transceivers with Sub-Array (with Quintel inside)
Qui
ntel
Cor
pora
te F
eed
Quintel C
orporate Feed
Integrated RRH/Passive Antenna (with Quintel inside)
What is an Active Antenna? • Integrated RRH/Passive
Antenna – Possibly with some level of
redundancy • Distributed Amplifiers
– 1 amplifier per element • Distributed Tranceivers with
Sub-Array – 1 amplifier per element pair (or
more) • Active/Passive Combinations
Quintel offers the capability to integrate with a - 4T4R RRH, or - External RRH, or - Ground based eNB
Quintel combined with Distributed Transceivers can increase tilt range 2 – 3 times over differential input
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Roadmap to 8T8R 2 X-POL Antennas with SONWavTM
Rx
Rx
Tx/R
x
Tx/R
x
4T4R
Dual X-Polar SONWavTM
4T4R
Rx
Rx
Tx/R
x
Tx/R
x
4T4R
Dual X-Polar SONWavTM
4T4R
+ =
1x Az null
1x El null
8T8R 8T8R
Too Wide, even at 0.5λ spacing?
• Standard <300mm (12”) Wide Form Factor; doesn’t have to be 0.5λ array column spacing • SONWavTM gives close in Null Fill effect = coverage and performance close to cell site
• Ideal for TD-LTE applications and offers promise of a higher gain BCH • Flexible to provide additional bands (i.e. Lowband Array and/or 2nd Highband via MultiServ) • Practical, near term solution
CLA-2X +
SONWavTM
Copyright © 2013 Quintel. All rights reserved. Quintel Confidential.
Thank You! Keith Radousky
404-520-8206 [email protected]
When wireless is pushed to the limit the answer isn’t more of the same
The answer is more innovation