ITRI small cell with smart antenna deployment, managed by ITRI SON server.

1. Copyright 2016 ITRI 1
Study for small cell with smart antenna
indoor deployment

2. Copyright 2016 ITRI 2
Outline
 ITRI SON with smart antenna
 ITRI SON solution for smart antenna application
 ITRI small cell and smart antenna spec.
 Use Case
 Smart antenna at office cubicles
 Smart antenna at corridor
 Interference management by smart antenna beam
pattern automatic adjustment
(ITRI-SON)

3. Copyright 2016 ITRI 3
Outline
 ITRI SON with smart antenna
 ITRI SON solution for smart antenna application
 ITRI small cell and smart antenna spec.
 Use Case
 Smart antenna at office cubicles
 Smart antenna at corridor
 Interference management by smart antenna beam
pattern automatic adjustment
(ITRI-SON)

4. Copyright 2016 ITRI 4
ITRI SON solution for smart antenna application
ITRI’s SON Server
ITRI’s SON Server to compute the transmission power and beam
pattern of each small cell by ITRI Smart Antenna CCO algorithm,
and to provide the optimal coverage and avoid the interference.
Each small cell informs the location information
to SON Server if turned on.
SON Server remote settings the transmission
power and beam pattern for each small cell.
1
2
3

5. Copyright 2016 ITRI 5
ITRI small cell and smart antenna spec.
 ITRI Small cell
 Transmission power
 19 ~ -40 dbm
 TD-LTE band 40(2300MHz)
 S1/X2 interface
 ITRI Smart antenna
 5 sector antennas for adaptive
beamforming
 Support 961 beam patterns
 Frequency Band:1710-2690MHz
Real Measurement of only A1 ON beam
pattern (RSRP)
A or B or A+B
3D figures of other beam patterns of Smart antenna
A1A1+A2+A3A1+A2+A3+A4
Adaptive beamforming
Structure of Smart
Antenna
Expected only A1
ON Beam Pattern

6. Copyright 2016 ITRI 6
Outline
 ITRI SON with smart antenna
 ITRI SON solution for smart antenna application
 ITRI smart antenna spec.
 Use Case
 Smart antenna at office cubicles
 Smart antenna at corridor
 Interference management by smart antenna beam
pattern automatic adjustment
(ITRI-SON)

7. Copyright 2016 ITRI 7
Smart antenna at office cubicles (1/3)
 Test Scenario
– Test location: Meeting room and aisle
– Test conditions：
» Small cell transmission power:
• 10dbm, 0dbm, -10dbm
» Beam Pattern:
 Smart Antenna withＡ1
 Omni
– Design of NLOS test environment:
» Orange line: Through a wall
» Blue line: Through three partitions
The direction of
Antenna A1 turned on
toward the arrow.
Partitions
Structure of smart antenna The radiation pattern in
only Antenna A1 turned
on.
R506
R506 R505
R501to door
from R506
to wall from R506

8. Copyright 2016 ITRI 8
Smart antenna at office cubicles (2/3)
• Result of indoor NLOS measurement
– Orange line: Through a wall
Wall
The direction of Antenna A1 turned on toward the arrow.
Partitions

9. Copyright 2016 ITRI 9
Smart antenna at office cubicles (3/3)
• Result of indoor NLOS measurement
– Blue line: Through three partitions
Partition
Partitions
The direction of Antenna A1 turned on toward the arrow.

10. Copyright 2016 ITRI 10
Smart antenna at corridor (1/3)
 Test Scenario
– Test location: Indoor aisle 1M~80M
– Test conditions:
» Small cell transmission power:
• 10dbm
» Beam Pattern：
 Omni
 Smart Antenna with A1~A5
Signal measurement: 51-5F aisle
Structure of smart antenna The radiation pattern in
only Antenna A1 turned on.

11. Copyright 2016 ITRI 11
Smart antenna at corridor (2/3)
• The performance measurement results of Smart Antenna indoor field LOS test
– Compare the SINR and RSRP performance of omni-directional antenna, smart antenna (with one antenna
A1 ON) and smart antenna (with five antennae A1~A5 ON) in the same transmission power
» Measurement result:
• LOS： omni-directional antenna > smart antenna(A1~A5)
• NLOS： omni-directional antenna > smart antenna(A1~A5)
Reason: The gain of smart antenna (with one antenna ON) is about 5db, and it decreases to 3db with five antennae ON, however,
the gain of omni-directional antenna is about 5db.

12. Copyright 2016 ITRI 12
Smart antenna at corridor (3/3)
• The performance measurement of Smart Antenna indoor field LOS test
» Test location: indoor long passageway starts from 1M to 80M
» Test condition:
• Small Cell Transmission power: 10dbm
• Beam Pattern: only A1 ON
» Test result
• LOS：smart antenna > omni-directional antenna
10
15
20
25
30
35
1m 3m 5m 10m15m20m25m30m35m40m45m50m55m60m65m70m75m80m
SINR 10db(1m~80m)
LOS of Omni-Directional LOS of Smart-Antenna
NLOS of Omni-Directional NLOS of Smart-Antenna
-140
-120
-100
-80
-60
1m 3m 5m 10m 15m 20m 25m 30m 35m 40m 45m 50m 55m 60m 65m 70m 75m 80m
RSRP 10dbm(1m~80m)
LOS of Omni-Directional LOS of Smart-Antenna
NLOS of Omni-Directional NLOS of Smart-Antenna
Average difference of LOS is about 4dbm Average difference of LOS is about 1db

13. Copyright 2016 ITRI 13
Interference management by smart antenna beam pattern
automatic adjustment (ITRI-SON)
 Interference management by ITRI-SON + Smart Antenna
 SON Server is combined with the interference
cancellation mechanism of Smart Antenna
− SON Server can mitigate signal interference and improve signal
quality through signal transmission direction and strength adjustment
 The mechanism of CCO automatic algorithm for Smart Antenna
− Combine with the CCO algorithm, automatically adjust the best
direction of beam pattern to mitigate signal interference and
improve network coverage and capacity
1m between two uDcells
eNB1 RSRQ eNB1 RSRQ eNB2 RSRQ eNB1 RSRQ eNB2 RSRQ eNB1 RSRQ
No
interference
Interference
occurs
HO between eNB1
and eNB2
HO between eNB1
and eNB2
interference
cancellation
Screenshot
of
engineering
edition
smartphone