5G NR

PDCP：packet data convergence protocol (TS 38.323) 5G NR PDCP has 3 main functions: 1. Header Compression 2. Encryption 3. Reordering The PDCP…

UE in RRC_CONNECTED, it will measure multiple beams of the cell to determine cell quality. Then it will report the measurements to network,…

We use this procedure to release RRC Connection. This procedure will release of the established radio bearers as well as radio resources.…

Note: This procedure is extra long, I have mentioned important points. It is better that you read it from specification. The purpose of this…

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…

This procedure is used to establish an RRC connection to the network. After this procedure SRB1 will be established. This procedure is also…

In this chapter we shall learn about RRC paging procedure. RRC paging function is used to trigger RRC Request and RRC Connection Resumption.…

SRB are used to transmission of RRC and NAS messages. There are 4 different types of SRB defied in TS 38.331. 1. SRB0. 2. SRB1. 3. SRB2. 4.…

RRC Timers Below are the timers available in 5G NR RRC: T300, T301, T302, T304, T311, T319, T320, T321, T325, T380, T390, T3xx Timer: T300 …

LTE had only 2 states i.e RRC_IDLE, RRC_CONNECTED. 5G NR has 3 states, the new state is RRC_INACTIVE state. When UE is in RRC_INACTIVE state,…