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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,…

In this chapter we shall have an introduction of 5G NR RRC Layer. RRC Layer is a control plane protocol stack. RRC layer is used for Access…

SDAP is a new layer in 5G NR. SDAP stands for Service Data Adaption Protocol. SDAP is a user plane protocol in 5G NR. The main functions of…

Reflective QoS is a new concept in 5G NR and is applicable for UpLink traffic of UE. This is applicable when SMF has not provided with QoS…

> WKT QFI is used to identify QoS flow. > QoS flow is the finest granularity of QoS differentiated services in a PDU session. >…