Interference rejection combining

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Interference rejection combining
Test cases
•
Following test cases are covered:
IRC-01
Activation/Deactivation of IRC for LTE Uplink
IRC-02
With IRC=OFF, Analyze performance of active Uplink User with Active
broadband interference
IRC-03
With IRC=ON, Analyze performance of active Uplink User with Active
broadband interference
Test configuration
•
•
•
•
•
eNodeB SW: R8AA (L11B)
Site DXL00634
700MHz Band
10MHz BW
LG AD600 as target and interfering UE
– UE HW Version 1.1
– UE SW Version 7.2.2
IRC-01
• IRC-01: Activation/De-activation of Interference Rejection Combining (IRC)
for LTE uplink
1. Activate featurestate
3. Feature is operable
2. Press apply
IRC-01
• IRC-01: Activation/De-activation of Interference Rejection Combining (IRC)
for LTE uplink
1. deActivate featurestate
3. Feature is inoperable
2. Press apply
Irc-02&03 – test setup
Target UE
• DL SINR: 25 dB
• UL SINR: 20 dB
• RSRP: -75 dBm
Target ue
Interfering UE
interfering ue
PTX= +23 dBm
• Connected to PCI 98
• Handover to 106 disabled
• Generates broadband UL
interference in Gamma sector (PCI
106)
• UE TX power manually fixed to
+23dBm
• 14dB reduction in Target UE UL
SINR when activated
Irc-02&03 – average throughput
› Average UL application layer throughput measured (iperf)
› 40% increase in throughput seen when IRC activated
› Note: the following are not be regarded as benchmark results but rather as proof-of-concept
Interfering
signal
Feature
state
Average UL
SINR (dB)
Average throughput
(Mbit/s)
No
IRC on
19.7
22.1
Yes
IRC on
10.1
16.2
Yes
IRC off
5.7
11.3
Time
14:20:13.26
14:19:58.51
14:19:44.14
14:19:29.54
14:19:15.14
14:19:00.51
14:18:46.14
14:18:31.51
14:18:17.10
14:18:02.53
14:17:48.09
14:17:33.53
14:17:19.09
Interference turned on
14:17:04.60
14:16:50.06
14:16:35.60
14:16:21.10
14:16:06.46
14:15:52.04
14:15:37.46
14:15:23.09
14:15:08.43
14:14:54.01
14:14:39.45
14:14:24.62
14:14:09.54
PUSCH Phy Throughput (kbit/s)
Irc-02&03 - Throughput vs time
IRC
turned OFF
All-PUSCH
Phy Throughput (kbit/s)Interference turned off
25000
20000
15000
All-PUSCH Phy Throughput (kbit/s)
10000
IRC turned ON
5000
0
THANK YOU

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