Radio Resource Connection (RRC) protocol in LTE
The Radio Resource Connection (RRC) protocol is implemented in the eNodeB and the UE. In WCDMA, it is implemented in the RNC!
RRC is the highest protocol in the control plane on the radio side. The RRC protocol allows:
- 2 instances (eNodeB and UE) to exchange signaling messages.
- to forward signaling messages coming from the core network, called NAS signaling.
Broadcast of system information related to non-access stratum (NAS),
– Broadcast of system information related to access stratum (AS),
– Paging,- Establishment, maintenance and release of an RRC connection between the UE and the e-UTRAN including:
- Allocation of temporary identifiers between UE and e-UTRAN,
- Configuration of signalling radio bearer(s) for RRC connection:
- Low priority SRB and high priority SRB.
Radio Resource Connection (RRC) Protocol in LTE
The RRC (Radio Resource Control) protocol in LTE is key for managing the communication between your device (UE) and the network. It controls the setup, maintenance, and release of radio connections. When you first connect to the network, RRC helps your device establish a secure communication link with the LTE network.
There are different states in the RRC protocol, like RRC_IDLE and RRC_CONNECTED. In the RRC_IDLE state, your device is connected to the network but not actively transmitting data. When you start browsing or making a call, the network moves your device to RRC_CONNECTED, where the communication becomes more active and dynamic.
For example, if you are streaming a video, RRC makes sure the connection remains stable, helping manage resources between the network and your device. It also handles handovers, ensuring you stay connected even as you move between different cell towers.
So, RRC protocol ensures that your device can efficiently access and use radio resources, maintaining a stable connection and ensuring a smooth experience when you’re on the network.