RRC uses the following states:

RRC_Idle:
•The UE is not connected. There is no radio link.
•The network knows that the UE is present on the network and is able to reach it in case of incoming call.
•The UE switches in idle mode when it is connected and there is no traffic to save radio resources and its battery.

RRC_Idle:
•The UE is not connected. There is no radio link.
•The network knows that the UE is present on the network and is able to reach it in case of incoming call.
•The UE switches in idle mode when it is connected and there is no traffic to save radio resources and its battery.

RRC_Connected
•The UE has an e-UTRAN-RRC connection.
•The network can transmit/receive data to/from the UE and knows its location at the cell level.
•The network manages the mobility with handover.

RRC_Connected
•The UE has an e-UTRAN-RRC connection.
•The network can transmit/receive data to/from the UE and knows its location at the cell level.
•The network manages
Diagram
The LTE UE could have one of the two following states:
  1. RRC Connected, when it has a RRC connection with a given eNB
  2. RRC IDLE when it has no valid RRC link with any eNB.