Category 5G-NR

N26 Interface support

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…

Radio Link Monitoring in 5G-NR

A UE when it is connected to the network, it needs to continuously monitor the Radio link for reliable communication. The UE monitor’s the downlink link quality based on the reference signal in order to detect the downlink radio link…

5G-NR RACH Trigger reasons

5G-NR RACH trigger reasons with details

There are certain conditions when UE needs to trigger RACH, even when it’s in RRC_CONNECTED mode. Below is the list of reasons when RACH Can be triggered in NSA and SA mode by a UE. NR RACH Trigger Reasons Initial…

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 MIB

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

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…

Protection of 5G RRC Messages

Protection of 5G RRC messages

There are certain messages that 3GPP has defined that can be sent prior to Access stratum security activation and some messages which should not be sent without integrity protection or unciphered after AS security activation Below are the list of…

5G Icons on Phones

5G PS Icon Indicator on Mobile Phones

If you are working in Wireless communications for modem/device or RAN industry Have you ever wondered when the 5G ICON is displayed on the mobile? A UE will display 5G PS ICON when it is in the SA Coverage area…