1. Part of the Tekes 5thGear programme and 5GTNF
The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
Marko Palola
VTT Technical Research Centre of Finland Ltd, Oulu, Finland
CORE++ Cognitive Radio Trial Environment Project
Part of the Tekes 5thGear programme and 5GTNF

2. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
Citizens Broadband Radio Service / Spectrum Access System Commercial Mobile Operator equipment: TD LTE-A base stations, LTE core network and network management system (NMS) Live trial uses licensed spectrum (10MHz) as a basic broadband service and when available from SAS tops up with dynamical spectrum (10Mhz) Three LTE-A base stations and 18 simulated base stations A laptop with QoS measurement is connected over the live trial.

3. Citizens Broadband Radio Service / Spectrum Access System
CBRS / SAS is defined and standardized by the Wireless Innovation Forum (WInnF) and the Federal Communications Commission’s (FCC).
In CBRS, the spectrum sharing is managed by SAS.
SAS enforces
Incumbents protected from interference/free access to band (sensing / restrictions)
PA users protected from other PA users and GAA users
GAAs not protected
Field trial uses MHz, four 10MHz channels.

4. Field trial: Architecture
CORE++
CORE++
CORE++ has setup a unique live LTE test network with commercial 4G/LTE-A

5. Field trial: Architecture
CORE++
CORE++
ESC determines availability of shared spectrum based on collected occupancy information (frequency, bandwidth, power)
SAS Repository gathers data about spectrum use and base stations.
Domain Proxy and stand-alone base station connect to CBSD Manager for shared spectrum access (REST API).
SAS Algorithm for channel allocations nd optimizations
DP uses NMS to configure the base station accordingly.
End user device detects Carrier Aggregation

6. Demonstration Four views are shown in the demonstration
CBRS visualisation
Domain Proxy
End user QoS view
Radar Sensing system

7. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
CBRS Visualisation
CORE++ Cognitive Radio Trial Environment Project
Part of the Tekes 5thGear programme and 5GTNF

8. The state of three live TD-LTE base stations is shown here.
The SAS Demo features
three PAL channels
and GAA channel
The map shows both live and simulated base stations (SAS Users).
All are small cells with 360 degree antennas

9. are on-air, two are GAA SAS users
CBDS-2 uses 10MHz licensed band and 10 MHz SAS band for carrier aggregation.
All three commercial
TD LTE-A base stations
are on-air, two are GAA SAS users
Carrier Aggregation is enabled, the mobile user transfers data at 63Mbps based on live measurement

10. The three commercial live LTE-A CBRS users are in the middle
Grey small cells are 18 simulated SAS PA and GAA users in neighbour census tracts

11. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
DOMAIN PROXY
CORE++ Cognitive Radio Trial Environment Project
Part of the Tekes 5thGear programme and 5GTNF

12. CBSD-2 cell with carrier aggregation is shown as deplyed and authorized cell.
The Domain Proxy is developed on Network Management System as a SON module.
The licenced band cell of CBSD-2 is not under DP control. The another sector depicts CBSD-1

13. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
RADAR SENSING SYSTEM
CORE++ Cognitive Radio Trial Environment Project
Part of the Tekes 5thGear programme and 5GTNF

14. On positive detection we communicate an ESC Alert to SAS
Occupancy scanner is used to detect presence of signal in SAS band

15. Signal generator is on PAL 1 channel (3551MHz)
Pulse repetition frequency 1 kHz
Pulse width 0.9 µs
Antenna scan rate 15 RPM
Antenna beam width 1.8 degrees

16. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
Mobile user QoS and LTE-A CA Cell
CORE++ Cognitive Radio Trial Environment Project
Part of the Tekes 5thGear programme and 5GTNF

17. Live performance measurement in the LTE-A test network
Mobile user data connection is measured over TD LTE-A access (CBSD-2)

18. Live measurement shows details about the LTE connection
CBSD-2 provides Carrier Aggregation to Mobile User

19. Evolution of the Spectrum Sharing Trials
in the CORE, CORE+ and CORE++ projects

20. The First End-to-End Live Trial of CBRS with Carrier Aggregation Using 3.5 GHz LTE Equipment
For further information, please visit the CORE++ project website:
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