5G-NR

Non-Cell Defining SSB (NCD-SSB)

What is NCD-SSB and why is it needed and what’s the use case here ? In Release-15 the term CD-SSB was referred to the SSB that accompanies RMSI i.e. the MIB of the CD-SSB carries information of the scheduled SIB1…

Cell Defining SSB (CD-SSB)

A PCell is always associated with a CD-SSB located on the synchronization raster. In NR Cell selection and Cell re-selection are always based on CD-SSBs located on the synchronization raster. The UE searches the NR frequency bands and for each…

Delta signaling in 5G NR

In 5G New Radio (NR), delta signaling refers to a signaling mechanism used to efficiently transmit control information between the base station (gNB) and user equipment (UE). It’s designed to reduce overhead and improve spectral efficiency in the wireless communication…

SCHEDULING REQUEST

Scheduling Request in 5G-NR

The concept of Scheduling request is same for LTE and 5G NR. Scheduling request is way for UE to tell the network that it has some data in its MAC buffer and it needs PHY resources in Uplink to send…

NR-DC intro

NR-NR Dual Connectivity (NR-DC)

NR-DC is the variant when the UE is connected to one gNB that acts as a Master Node and one gNB that acts as a Secondary Node. The Master Node is connected to 5GC while the Secondary Node is connected…

PDCCH ORDER 5gnr

PDCCH order in 5G NR

PDCCH order is one of the reasons for RACH trigger in both LTE and 5G-NR. If the network detects that there is DL Data to be sent to UE in its MAC Buffer and there is a UL synchronization issue…

SELF-CONTAINED SLOT

What is self Contained Slot?

In 5G New Radio (NR), a “time slot” refers to a discrete unit of time within the radio frame structure used for the transmission and reception of data. Time slots are an essential concept in wireless communication systems, including 5G…

Beam Correspondence

Beam Correspondence in 5G-NR

3GPP Defines Beam correspondence as to the ability of the UE to select a suitable beam for UL transmission based on DL measurements with or without relying on UL beam sweeping. The beam correspondence requirement is satisfied assuming the presence…

5G-NR Physical Layer SpecficationsOverview

5G-NR Physical Layer Specifications overview

The Physical layer specifications of 5G-NR are spread across six Specification documents and one general description document; The relation between Multiple PHY Layer specifications is illustrated below. TS 38.201: 5G NR Physical layer; General description The scope of the document…