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NB-IoT Use case Customer unmet need
Our solution
Acceptance Test
NB-IoT Signal Analyzer can support acceptance test in compliance with 3GPP recommendation. • Max output power of PRB(Physical Resource Block) carrying NB-IoT Channels • Total Power dynamic range of NB-IoT PRB • EVM for NPDSCH • (DL) NRS power, EVM • Frequency Error
Operators need a cost-effective solution to verify their network
Network Performance Optimization For NB-IoT service launching, Inter-PRB interference is one of key concern. Customer need a solution to verify inter PRB interference with EVM measurement. As shown with the screenshot, some spurious emission to the neighboring PRB is monitored. This should be a interference that worsen the signal quality of neighboring channel. Vice versa, PRBs for LTE transmission can also impact on NB-IoT channel quality.
CellAdvisor can measure the EVM of individual PRB carrying PDSCH so that customer can pinpointed the impacted PRBs and measure the signal quality degradation quantitatively. In conjunction with CellAdvisor’s LTE signal analysis capability, NB-IoT Signal Analyzer can provide the detailed information about NB-IoT channels per frame or per Subframe. It allows analytical approach to the root cause on the customer’s network.
Summary NB-IoT Deployment
In-band, Guard-band, Standalone
Coverage (MCL)
164 dB
Downlink
OFDMA, 15 KHz tone spacing, 1 Rx
Uplink Single tone:
15 KHz and 3.75 KHz spacing, SC-FDMA: 15 KHz tone spacing, Turbocode
Bandwidth
180 KHz
Highest modulation
QPSK
Link peak rate (DL/UL)
DL: ~30 kbps UL: ~60 kbps
Duplexing
HD FDD
Power saving
PSM, extended Idle mode DRX with up to 3hrs cycle, Connected mode DRX with up to 10.24 s cycle