Editing My 3GPP 23.501 Notes (section)

=== 5.3.3 Connection Management ===

==== 5.3.3.1 General ====

Connection management comprises the functions of establishing and releasing a NAS signalling connection between a UE and the AMF over N1. This NAS signalling connection is used to enable NAS signalling exchange between the UE and the core network. It comprises both the AN signalling connection between the UE and the AN (RRC Connection over 3GPP access or UE-N3IWF connection over untrusted N3GPP access or UE-TNGF connection over trusted N3GPP access) and the N2 connection for this UE between the AN and the AMF.

==== 5.3.3.2 5GS Connection Management states ====

===== 5.3.3.2.1 General =====
Two CM states are used to reflect the NAS signalling Connection of the UE with the AMF:
* CM-IDLE
* CM-CONNECTED
The CM state for 3GPP access and Non-3GPP access are independent of each other, i.e. one can be in CM-IDLE state at the same time when the other is in CM-CONNECTED state.