Methods and systems for handling satellite parameters in a next generataion communication system

A method performed by a non-terrestrial network (NTN) node in a communication system, the method comprising:

• determining to initiate a detach procedure for a terminal in an evolved-universal mobile telecommunication access (E-UTRA) mobility management (EMM)-REGISTERED state, based on a current location of the terminal;
• and
• transmitting, by a mobility management entity (MME) of the NTN node to the terminal, a detach request message including information on a store and forward (S&F) satellite operation, the information on the S&F satellite operation including an S&F monitoring list of a satellite identity (ID),
• wherein the EMM-REGISTERED state is changed to an EMM-DEREGISTERED state after the detach procedure.

A terminal in a communication system, the terminal comprising:

• a transceiver;
• and
• a controller configured to:
• control the transceiver to receive, from a mobility management entity (MME) of a non-terrestrial network (NTN) node, a detach request message for initiating a detach procedure, in an evolved-universal mobile telecommunication access (E-UTRA) mobility management (EMM)-REGISTERED state, and
• enter an EMM-DEREGISTERED state after the detach procedure,
• wherein the detach request message includes information on a store and forward (S&F) satellite operation, the information on the S&F satellite operation including an S&F monitoring list of a satellite identity (ID).

A non-terrestrial network (NTN) node in a communication system, the NTN node comprising:

• a base station;
• and
• a mobility management entity (MME) which comprises a transceiver and a controller,
• wherein the controller is configured to:
• determine to initiate a detach procedure for a terminal in an evolved-universal mobile telecommunication access (E-UTRA) mobility management (EMM)-REGISTERED state, based on a current location of the terminal;
• and
• control the transceiver to transmit, to the terminal, a detach request message including information on a store and forward (S&F) satellite operation, the information on the S&F satellite operation including an S&F monitoring list of a satellite identity (ID), and
• wherein the EMM-REGISTERED state is changed to an EMM-DEREGISTERED state after the detach procedure.