BVKS_MSTS_Presentation_02
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• GPS
• MCU
• I/O
• Battery powered
• HW board for
comparison of key
parameters:
• Sensitivity
• AT commands
NB-IOT TRIAL – COMMUNICATION INFRASTRUCTURE
59
• Communication infrastructure:
• Test scenario:
• Test duration: 5 min
• Interval: 30 s
• Data length: 450 B
Controlling NTB
for NB-IoT board
NB-IoT
device
eNodeB
(NB-IoT)
Communication
through the network
Remote server at
BUT university
Bidirectional communication (sent data and receive the
acknowledgment) utilizing the UDP transport protocol
• Measured parameters:
• RTT (Round Trip Time)
• Network throughput
• RSSI, RSRQ, RSRP, SNR
NB-IOT TRIAL – USED AT COMMANDS
60
• Test scenario (sequence of utilized AT commands):
• Using terminal application e.g., Putty
----------------------------------------------------------------------------------------------
1. AT+NRB
2. AT+CFUN
3. AT+CPSMS=1,,,"10000010","00100001“
4. AT+NPSMR=1
5. AT+COPS=1,2,"23003“
6. AT+CEREG?
7. AT+NUESTATS="ALL“
8. AT+CGDCONT=1,"IP","GPRST.INTERNET“
9. AT+NSOCR="DGRAM",17,50105,1
10. AT+NSOSTF=0,"147.229.146.40",50105,0x200,2,"2A2A“
11. AT+NSONMI: 0,2
----------------------------------------------------------------------------------------------
NB-IOT TRIAL – USED AT COMMANDS
61
NB-IOT TRIAL – POWER CONSUMPTION
62
• NB-IoT v2.1 – SARA N210 (latest FW) – power consumption / PSM
NB-IOT TRIAL – SARA N210 UPLINK
63
NB-IOT TRIAL – SARA N210 DOWNLINK
64
NB-IOT TRIAL – POWER CONSUMPTION
65
• Quectel Development Kit BC95-B20 – power consumption / PSM
NB-IOT TRIAL – QUECTEL BC95-B20 UPLINK
66
NB-IOT TRIAL – QUECTEL BC95-B20 DOWNLINK
67
NB-IOT TRIAL – LESSONS LEARNED
68
• Performed M2M trials (14.2.2018)
• Location Brno, Královo Pole (BUT)
• Test duration: 48 hours
• Transmission interval: 3 min
• Type of communication: bidirectional, UDP protocol
• Message length: 450 B
• Obtained results (SARA N210):
• Sent: 1066 messages; Uplink: 100% success rate
• Received: 978 messages; Downlink: 91.7% success rate
• Obtained results (Quectel Development Kit BC95-B20):