NB-LTE (NB-IoT)
- PHYSICAL LAYER (L1)
-
Overview
- Similarity/Difference
- Modes
-
Downlink
- DL: Frame Structure, OFDM Baseband Signal
- DL : NPSS (Narrowband Primary Synchronization Signal)
- DL : NSSS (Narrowband Secondary Synchronization Signal)
- DL : NRS (Narrowband Reference Signal)
- DL: NPBCH (Narrowband Physical Broadcasting Channel)
-
DL: PDCCH/DCI
- DCI(Downlink Control Indicator) - Format N0, N1, N2
- Subcarriers for NPUSCH with sc-spacing = 15 Khz
- Resource units (N_RU) for NPUSCH
- Modulation and TBS for NPUSCH with N_sc^RU = 1
- #Repetitions (N_Rep) for NPUSCH
- ACK/NACK subcarrier and k0 for NPUSCH with 3.75/15khzKHz
- N_SF and N_Rep for NPDSCH
- Modulation and TBS determination
- NPDCCH Search Space and subframes
-
Uplink
-
UL: Frame Structure
- 15khz and 3.75khz structure
- NPUSCH format 1 and 2
- UL : SC-FDMA Baseband Signal Generation
-
UL: Frame Structure
-
MAC (L2 Layer)
- LTE-NB : Channel Structure
-
LTE-NB : HARQ
- PDSCH and PUSCH
- NARQ Call flow
- LTE-NB : Multi Carrier Operation (Anchor Carrier, Non-Anchor Carrier)
- LTE-NB : RACH
-
RRC (L3 Layer) and NAS
- LTE-NB : RRC
- Functions
- DL-BCCH-BCH/DL-SCH
- DL-PCCH/CCCH/DCCH
- UL-CCCH/DCCH
-
LTE-NB : MIB/SIB Scheduling
- MIB/SIB Decoding
- Operation Mode and MIB-Scheduling
- MIB Example
- SBI1 Scheduling in MIB
- SIB1 Parameters, Sched-Info, Example
- SIB2 – Radio+RACH Config
- SIB2 Example
- LTE-NB : SRB Mapping
- LTE-NB : UE-Category
- LTE-NB : RRC
Overall Call flow (RRC ad NAS)
-
LTE-NB : Full Stack Protocol Sequence
- Power On Attach Procedure
- MIB/SIB1/SIB2/SIB3
- RRC_Connection_Req/Setup/SetupCpmplete
- Attach Request/UE Network Capability
- Authentication Req/Response
- NAS Security Mode Command/Complete
- Attach Accept + Def Bearer Setup
- ESM Container
- GUTI/Features
- UP-CP Mode
-
LTE-NB : CIoT EPS Optimization
- CIOT Architecture
- MO Data
- MT Data