BVKS_MSTS_Presentation_02
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• Obtained results:
• Downlink
• Delay (RTT): avg. 8 s
• Throughput: 0.45 kbps
• Communication reliability:
• Sent: 20 messages (message length -- 450 B)
• Received: 20 (100 % -- success rate)
• Lost messages: 0 (0 % -- loss rate)
• Uplink
• Delay (RTT): avg. 10.7 s
• Throughput: 0.38 kbps
NB-IOT TRIAL – LESSONS LEARNED 2/2
52
• Power consumption (Rev. 2.1 – Antenna Siretta Echo 2)
• Active state (TX): ~180 mA
• Active state (RX): ~120 mA
• Radio module off: ~50 mA
• Deep sleep mode: ~3-4 uA
• Open questions:
• The behavior of the NB-IoT module during the „deep sleep
phase“ with respect to the network configuration
• PSM mode needs to be clarified
• Unexpectedly high values of RTT and delay for the data
transmissions
NB-IOT
53
Realized measurements #2
(6.1.2018)
NB-IOT TRIAL – MEASUREMENT LOCATIONS IN BRNO
54
• Date: 04.12.2017
• Location: Brno
• M2M trial setup:
• Length: 450 B
• Interval: 30 s
• Capturing radio
conditions for:
• 2G/3G/4G
• LoRaWAN/Sigfox
• LTE-450MHz
• NB-IoT
NB-IOT TRIAL – COVERAGE (VODAFONE; LTE 800MHZ)
55
NB-IOT TRIAL – LESSONS LEARNED
56
• Performed M2M trials (6.1.2018)
• Location Brno (10 selected places)
• Test duration: 5 min
• Transmission interval: 30 s
• Type of communication: bidirectional, UDP protocol
• Message length: 450 B
• Obtained results (SARA N210; Rev. 2.1):
• Uplink at all location: 100% success rate
• Downlink: the success rate varied on measurement
location and was in range 60 – 100% based on the RSSI
and SINR
• We do plan to have second round of measurements in
coming weeks with updated firmware versions for both
modems
NB-IOT
57
Realized measurements #3
(14.2.2018)
NB-IOT TRIAL – FINAL MEASUREMENTS AT BUT
58
• NB-IoT v2.1 – SARA N210
• Quectel Development Kit BC95-B20
• Tuned HW design: