When UE is switched on it will acquire system information for cell selection, cell-reselection. MIB and SIB1 are 2 important SI that UE requires to select and latch on to a cell. MIB and SIB1 are called as “MSI” “Minimum System Information”. Standalone SIB1 is called …
When UE is in RRC_IDLE mode, it needs to read the system information for cell selection and cell reselection. System Information(SI) will be transmitted periodically by base station. In 5G NR the SI is divided into 3 parts as below: 1. Minimum System Information (MSI) 2. …
For a UE to access to the network, first it has to latch on to a network. For that UE needs to find the cell and synchronize it in frequency and time domain. After that it needs to read system information. This will be done with …
SSB stands for stands for Synchronization Signal Block. It is commonly referred as Synchronization/PBCH block as it has Synchronization and PBCH channel. So a SSB has: 1. Synchronization Signal : PSS (Primary Synchronization Signal), SSS (Secondary Synchronization Signal) 2. PBCH : PBCH DMRS and PBCH (Data) …
When a UE is switched on how does it knows to which cell it should camp on ? This is done by cell search and system acquisition procedure. According to TS 38.300 – 5.2.5.3 cell search procedure can be defined as below: In cell search procedure, …
SCS (sub-carrier space)-sub-carrier space SCS is the space between 2 OFDM symbols. In LTE it is fixed at 15KHz. In 5G NR, there are 5 possible values based on numerology. Slot In the time domain, 5G and LTE are the same: 1 frame=10ms, 1 frame contains …
PDCCH is a downlink control channel. It carries control information DCI of PUSCH and PDSCH. In LTE PDCCH occupies the entire bandwidth in frequency domain and first 1-3 symbols in each subframe in time domain. In 5G NR, as the bandwidth is more, it will be …
