5G NR PDCP duplication and duplication Procedures
Below shows a schematic diagram of PDCP duplication: If PDCP duplication is not enabled, a PDCP packet will be transmitted to an RLC entity…
5G NR PDCP SDU discard and Status reporting
SDU discard For DRB, When the discardTimer expires for a PDCP SDU, or the successful delivery of a PDCP SDU is confirmed by PDCP status…
5G NR PDCP Layer Procedures state variables
In this section, we shall learn about Transmit and Receive operation along with related state variables. Constants and timers: Window_Size:…
5G NR PDCP Layer PDCP entity Establishment procedures
5G NR PDCP entity establishment When upper layers request a PDCP entity establishment for a radio bearer, the UE shall: – establish a PDCP…
5G NR PDCP Layer Introduction
PDCP：packet data convergence protocol (TS 38.323) 5G NR PDCP has 3 main functions: 1. Header Compression 2. Encryption 3. Reordering The PDCP…
5G NR RRC: UE measurements
UE in RRC_CONNECTED, it will measure multiple beams of the cell to determine cell quality. Then it will report the measurements to network,…
5G NR RRC: RRC connection release procedure
We use this procedure to release RRC Connection. This procedure will release of the established radio bearers as well as radio resources.…
5G NR RRC: RRC connection reconfiguration procedure
Note: This procedure is extra long, I have mentioned important points. It is better that you read it from specification. The purpose of this…
5G NR RRC: RRC connection re-establishment procedure
UE will initiate this request to re-establish RRC COnncetion. A UE in RRC_CONNECTED with AS security has been activated with SRB2 and at-least…
5G NR RRC: RRC connection establishment procedure
This procedure is used to establish an RRC connection to the network. After this procedure SRB1 will be established. This procedure is also…