Introduction to RWC5020A LoRa Tester

Transcription

1 Introduction to RWC5020A LoRa Tester RedwoodComm

2 Features (1/2) 3 Operational Modes End Device Test (EDT): emulating a Gateway/Server Gateway Test (GWT): emulating an End Device Non-signaling Test(NST) : generating LoRa frames/cw or measuring received power Link Analyzer Analyzing frames for MAC/PHY Analysis TX Power Measurement Continuously monitoring TX power of DUT with respect to channels or data rates (SF) according to TXPower index RX Sensitivity Test (Measuring PER) Finding the minimum power level which DUT can receive frames from the Tester (for each SF or each RX window) LoRaWAN TM Compatibility Supporting Class A/B/C for V

3 Features (2/2) LoRaWAN TM Certification Tests Confirming that the end device meets the functional requirements of the LoRaWAN TM protocol specification LoRaWAN TM Certification: EU V1.5, US V1.2, AS V1.0, KR V1.1 Operator Certification: SKT Automated PC Software Enabling remote execution of all built-in functions from a remote PC, including LoRaWAN TM Certification Tests Dumping all link messages between DUT & RWC5020A Controlling DUT(via serial port) as well as RWC5020A Supported Region EU , US , EU 433, Australia , CN , AS 923, South Korea , India

4 Specification Frequency Range 400MHz ~ 510MHz, 862MHz ~ 960MHz (100Hz resolution) Output Power Range -10 ~ -150dBm (0.5dB resolution, ±1dB accuracy) Input Power Range +30 ~ -50dBm Interface Ethernet, RS-232 Dimension 250(W) x 110(H) x 348(D) mm Weight 5kg 4

5 End Device Test RWC5020A DUT Gateway/Server End Device 5

6 EDT Link Analyzer Blue Color: Uplink frames (DUT sent) Black Color: Downlink frames (RWC5020A sent) Time between consecutive frames from DUT Contents in a message at cursor Raw data in hexa-decimal format 6

7 EDT Link Analyzer Select a MAC command to be sent from the configuration Push [MAC_SEND] to send it Push [MAC_SEND] to send the selected MAC command 7

8 EDT Link Analyzer Multiple MAC commands in single frame 8

9 EDT Power vs. Time Meas. Continuous monitoring of DUT s TX Power w.r.t. SF Calculating the maximum/average/minimum values 9

10 EDT Power vs. Channel Meas. Continuous monitoring of DUT s TX Power w.r.t. Channel Calculating the maximum/average/minimum values 10

11 EDT RX Sensitivity Test Determine power range and step for testing The result value is the minimum power level at which DUT can receive the Tester s frame 11

12 Sensitivity Test Scenario NORMAL_UL CERTI_ECHO Tester DUT Tester DUT PASS FAIL PASS FAIL PASS PASS 12

13 Comparison to Commercial Gateway - LoRaWAN protocol functional tests only - Various regional gateways required - Not easy to use Network Server Ethernet RF Cable - Not easy to control TX power of Gateway for performance test CTE Control PC & Network Server Gateway (EU, US, AS, ) RF Shield Box or Chamber - LoRaWAN protocol functional tests and RF performance tests - Emulation of various regional gateways (EU, US, AS, CN,...) including network server functions - Wide dynamic range of TX power with accurate control (-10 ~ -150dBm) - Accurate power measurement RWC5020A LoRa Tester RF Cable RF Shield Box or Chamber 13

14 Comparison to Commercial Gateway Comparison between RWC5020A and commercial gateways in testing End Devices 14

15 Gateway Test RWC5020A DUT End Device Gateway/Server 15

16 GWT Link Analyzer Blue Color: Downlink frames(dut sent) Black Color: Uplink frames(rwc5020a sent) 16

17 GWT Link Analyzer Select a MAC command to be sent from the configuration Push [MAC_SEND] to send it Push [MAC_SEND] to send the selected MAC command 17

18 GWT Power vs. Time Meas. Continuous monitoring of DUT s TX Power w.r.t. SF Calculating the maximum/average/minimum values 18

19 GWT Power vs. Channel Meas. Continuous monitoring of DUT s TX Power w.r.t. Channel Calculating the maximum/average/minimum values 19

20 GWT RX Sensitivity Test Determine power range and step for testing The result value is the minimum power level at which DUT can receive the Tester s frame 20

21 Non-signaling Test RWC5020A DUT End Device or Gateway In Test Mode LoRa Test Frame Periodic Repetition 21

22 NST Signal Generator RF setup LoRa Frame setup 22

23 NST Signal Analyzer Mode: LoRa RF setup 23

24 PC Software Ethernet RS232 24

25 TX/RX Performance Tests 25

26 LoRaWAN TM Certification Tests 26

27 Control DUT using user defined cmd. 27

28 Considering about Manufacturing 1. Test Setup 2. Normal mode (ABP) 3. Test Mode (Non-signaling) 28

29 DUT Controller DUT CMD Mapper Ethernet Shield Box Test Setup RF Cable ANT Tester Controller Application Core Serial port (if needed) PC Application Program User Defined Command Table It is Required to isolate interference btw. lines 29

30 Test Setup Fixture is required for fixed positioning Path loss should be measured between Ref antenna and DUT Golden unit could be used: Known TX Power Shield Box (RF Encloser) is required to isolate interference btw. Lines or air signal RWC5020A LoRa Tester Path loss ~ 30dB RF Cable Path loss < 1dB 30

31 Normal Mode (ABP) Skip Activation (ABP) Activation takes long time DUT sends Confirmed-Up message periodically Example: 10 times with 5 sec interval Tester responses with ACK and measures PER Measures the TX power of DUT at the same time 31

32 Test Mode (Non-signaling mode) DUT s RX Performance Test Set the DUT to always Listen the pre-defined packet Tester transmit pre-defined number of packet DUT needs to calculate PER by itself DUT s TX Performance Test Set the DUT to always transmit the predefined packet Tester measures TX power 32

33 Comparison Pros Cons Example Tack time = 60 sec Normal Mode(ABP) No need special test mode Measure TX & RX simultaneously It could test only one packet per 5 sec. DUT uses one of default channel randomly Can be tested 10 packets Test Mode It could test more packets during the same period Can use the channel as user want to Need to implement test mode TX & RX should be tested separately Can be tested 40 packets(sf12) for RX PER Can be tested 10 packets for TX Power Measurement It requires switching time btw. TX and RX test Can reduce Tack time using two RWC5020A (refer next slide) 33

34 Conveyer Line Setup Example (Non-signaling) NST Signal Analyzer NST Signal Generator Test Mode Enable TX Test Mode Switching TX RX RF Divider 10 sec Tack Time TX TEST RX TEST TX test is simple (takes less than 10sec) RX test takes long time(40sec) for reasonable PER result RF Divider can be used for parallel RX testing to reduce Tack time DUT should be isolated by shield box Shield Box 34