Study for small cell with smart antenna indoor deployment. Copyright 2016 ITRI 1
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1 Study for small cell with smart antenna indoor deployment Copyright 2016 ITRI 1
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) Copyright 2016 ITRI 2
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) Copyright 2016 ITRI 3
4 ITRI SON solution for smart antenna application ITRI s SON Server 1 Each small cell informs the location information to SON Server if turned on. 2 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. 3 SON Server remote settings the transmission power and beam pattern for each small cell. Copyright 2016 ITRI 4
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: MHz Adaptive beamforming Real Measurement of only A1 ON beam pattern (RSRP) 3D figures of other beam patterns of Smart antenna A or B or A+B Structure of Smart Antenna Expected only A1 ON Beam Pattern A1+A2+A3+A4 A1+A2+A3 A1 Copyright 2016 ITRI 5
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) Copyright 2016 ITRI 6
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 R506 to wall from R506 R505 from R506 R506 to door R501 The direction of Antenna A1 turned on toward the arrow. Partitions Structure of smart antenna The radiation pattern in only Antenna A1 turned on. Copyright 2016 ITRI 7
8 Smart antenna at office cubicles (2/3) Result of indoor NLOS measurement Orange line: Through a wall Wall Partitions The direction of Antenna A1 turned on toward the arrow. Copyright 2016 ITRI 8
9 Smart antenna at office cubicles (3/3) Result of indoor NLOS measurement Blue line: Through three partitions Partitions The direction of Antenna A1 turned on toward the arrow. Partition Copyright 2016 ITRI 9
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. Copyright 2016 ITRI 10
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. Copyright 2016 ITRI 11
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 RSRP 10dbm(1m~80m) SINR 10db(1m~80m) m 3m 5m 10m 15m 20m 25m 30m 35m 40m 45m 50m 55m 60m 65m 70m 75m 80m 10 1m 3m 5m 10m15m20m25m30m35m40m45m50m55m60m65m70m75m80m LOS of Omni-Directional LOS of Smart-Antenna LOS of Omni-Directional LOS of Smart-Antenna NLOS of Omni-Directional NLOS 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 Copyright 2016 ITRI 12
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 Screenshot of engineering edition smartphone No interference Interference occurs HO between enb1 and enb2 HO between enb1 and enb2 interference cancellation Copyright 2016 ITRI 13
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