5G NR Timers and Constants
5G NR UE Timers and Constants Below is the list of all the UE Timers and Constants in the 5G NR. All descriptions have been copied from the spec and have not been modified to keep the original information handy…
5G-NR
DAPS Handover: UE Functionality
During the NR Registration procedure, UE will include its support for Dual Active Protocol stack (DAPS) Handover in the UE Capability message. If there is no support for DAPS from UE, then the network will not configure DAPS handover for…
DAPS Handover: Release-16 Call flow
IN 5G-NR UE’s operating in RRC_Connected mode can be categorized into two types of mobilities Cell level mobility and Beam Level Mobility which are network controlled procedures. In Release-15 3GPP has introduced the inter-gNB handover procedure which is similar to…
What is N26 Interface in 5G and what’s its importance?
N26 interface is an inter-Core Network interface between the MME and 5GS AMF in order to enable interworking between EPC and the NG core. Inter-RAT Mobility procedures involving mobility between LTE-EPC and 5G-NR-5GS utilize the N26 interface which enables the…
Difference between BLER for Radio Link Management and BLER in Data throughput?
What’s the difference between BLER for Radio Link Management and BLER in Data throughput? A Block Error Ratio(BLER) is defined as the ratio of the number of erroneous blocks received to the total number of blocks sent. BLER = Number of…
What is the 10% BLER target in LTE and NR?
There is a Buzz word which everyone says that BLER should be under 10%, but 10% of what? There are two scenarios where BLER calculation is taken into account – BLER Target for Radio Link Monitoring– BLER Target for PDSCH…
Radio Link Monitoring (RLM) and Radio Link Failure (RLF) in 5G-NR
The Radio Link Monitor (RLM) is a crucial component in ensuring reliable communication in 5G New Radio (NR) networks. It evaluates the quality of the radio link and interacts with the RRC layer to detect potential failures. Below is a…
Where is SSB located in the time domain?
SSB Burst is contained inside a 5ms time frame and up to a max of 64 SSB beams are transmitted within the 5ms time period. A radio frame is of 10ms and the SSB burst can happen in the first…
5G-NR Master Information Block (MIB)
MIB is mandatory system information that is broadcasted by the gNB at a set periodicity. During the initial cell selection procedure, UE assumes that the SSB is broadcasted every 20ms by the gNB. UE gets MIB by decoding the PBCH…
Guide to reading 3GPP Specifications
Reading specs from 3GPP can be sometimes very difficult as there are so many specs and navigating through each of them can be a daunting task and there is no definitive and clear guide on how to use the specs…