The Radio Resource Control (RRC) protocol is used in UMTS, LTE and 5G on the Air interface. It is a layer 3 (Network Layer) protocol used between UE and Base Station. This protocol is specified by 3GPP in TS 25.331 [2] for UMTS, in TS 36.331 [3] for LTE and in TS 38.331 [4] for 5G New Radio. RRC messages are transported via the PDCP-Protocol.

(1) is the command (RRC message) to tel the UE to configure the Radio Stack (PHY, MAC) to establish the aggregated communication (Carrier Aggregration). You need to look into every details of RRC Connection Configuration message to fully understand this step.

Dec 19, 2023 · The RRC layer in 4G (LTE) networks plays a critical role in controlling the establishment, maintenance, and release of radio bearers, managing security procedures, and enabling mobility within the network.

If you look further details of RRC Connection Setup and RRC Conection Reconfiguration message, you would notice that RRC Connection Setup is mainly for SRB establishment and RRC Connection Reconfiguration is mainly for setting up DRB setup (RRC Connection Reconfiguration can redefine SRB as well).

Upon entering RRC_CONNECTED, when PLMN selection is performed on request by NAS, or upon cell (re)selection to another RAT (in which case the timer is carried on to the other RAT). Discard the cell reselection priority information provided by dedicated signalling.

This article is about RRC counters used to find RRC failures (LTE), Failure Causes and Solution. After, we discussed one by one RF optimization possible solutions of RRC Setup Failure Measurement and what actions can be taken by RF 4G optimization engineer.

Sep 6, 2024 · The Radio Resource Control (RRC) protocol is a crucial component of the LTE (4G) network architecture. It operates at the network layer (Layer 3) and is responsible for managing the connection between the User Equipment (UE) and the Evolved NodeB (eNB).

Dec 1, 2024 · In LTE KPI Optimization series, this session explains the LTE RRC Success Rate KPI. The session covers the signalling flow for LTE accessibility in detail along with messages where the KPIs are pegged. The causes of LTE RRC failures are also covered in detail along with actions that can resolve those issues.

Mar 8, 2024 · 4g Radio resource control (RRC) protocol exists at IP level (layer 3) between UE and eNB. The major functions of the RRC protocol include connection establishment/release functions, broadcast of system information, radio bearer establishment, reconfiguration/release, RRC connection mobility procedures, paging notification and outer loop power ...

RRC protocol layer exists in UE & eNodeb, It is part of LTE air interface control plane. The main services and functions of the RRC sublayer include: Broadcast of System Information related to the non-access stratum (NAS); Broadcast of System Information related to …