RRC reestablishment between TN and NTN

A method of wireless communication at a user equipment (UE) on a first network associated with one of a terrestrial network (TN) or a non-terrestrial network (NTN), comprising:

• transmitting a radio resource control (RRC) connection request to establish a connection with a second network associated with one of the NTN or the TN, wherein the RRC connection request comprises a network field that indicates that the UE was previously connected to the TN or the NTN, wherein the network field comprises a one-bit field;
• receiving an RRC reconnection message from a network entity associated with the second network;
• and
• transmitting an RRC reconnection complete message to the network entity associated with one of the NTN or the TN of the second network.

An apparatus for wireless communication at a network entity on a second network associated with one of a non-terrestrial network (NTN) or a terrestrial network (TN), comprising:

• a memory;
• and
• at least one processor coupled to the memory and, based at least in part on information stored in the memory, the at least one processor is configured to:
• receive, from a user equipment (UE) on a first network associated with one of the TN or the NTN, a radio resource control (RRC) connection request to establish a connection with the second network, wherein the RRC connection request comprises a network field that indicates that the UE was previously connected to the TN or the NTN, wherein the network field comprises a one-bit field;
• transmit an RRC reconnection message in response to receiving the RRC connection request;
• and
• receive an RRC reconnection complete message from the UE previously associated with the first network.

A method of wireless communication at a network entity on a second network associated with one of a non-terrestrial network (NTN) or a terrestrial network (TN), comprising:

• receiving, from a user equipment (UE) on a first network associated with one of the TN or the NTN, a radio resource control (RRC) connection request to establish a connection with the second network, wherein the RRC connection request comprises a network field that indicates that the UE was previously connected to the TN or the NTN, wherein the network field comprises a one-bit field;
• transmitting an RRC reconnection message in response to receiving the RRC connection request;
• and
• receiving an RRC reconnection complete message from the UE previously associated with the first network.