LTE NB IoT channel types | Downlink, Uplink signals and channels
This page covers LTE NB IoT channel types. It mentions LTE-NB IoT signals and channels used in the downlink (NPSS, NSSS, NRS, NPBCH, NPDCCH, NPDSCH) and uplink (DMRS,NPRACH,NPUSCH) directions.
• LTE NB IoT consists of physical signals and physical channels.
• Physical signals are used for system synchronization, cell identification and channel estimation.
• Physical channels are used for transporting control, scheduling and to carry
user payloads from higher layers.
• NB-IOT uses OFDMA in the downlink and SC-FDMA in the uplink direction in physical layer.
• It supports FDD and TDD modes of operation.
The figure mentions signal and channel types used in LTE-NB or NB-IoT technology both in the downlink and uplink
directions.
➤NPSS: It stands for Narrowband Primary Synchronization Signal.
➤NSSS: It stands for Narrowband Secondary Synchronization Signal.
➤NRS: It stands for Narrowband Reference Signal.
➤NPBCH: It stands for Narrowband Physical Broadcast Channel.
➤NPDCCH: It stands for Narrowband Physical Downlink Control Channel.
➤NPDSCH: It stands for Narrowband Physical Downlink Shared Channel.
➤DMRS: It stands for Demodulation Reference Signal which is used in the uplink direction.
➤NPRACH: It stands for Narrowband Physical Random Access Channel.
➤NPUSCH: It stands for Narrowband Physical Uplink Shared Channel.
NB-IoT Related Stuff
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