Method and device for switching an IoT mode in wireless communication system

1. A method performed by a communication device in a wireless communication system, the method comprising:

transmitting a radio resource control (RRC) connection release request message including information about at least one preferred target Internet of things (IoT) mode;

receiving a RRC connection release message including information about a target IoT mode based on the RRC connection release request message; and

releasing an RRC connection based on the RRC connection release message,

wherein the communication device switches from a source IoT mode to the target IoT mode based on the information about the target IoT mode and the target IoT mode is determined based on the information about the at least one preferred target IoT mode.

2. The method according to claim 1 , wherein the communication device switches from the source IoT mode to the target IoT mode simultaneously with the release of the RRC connection or at a time within a predetermined period from a time when the RRC connection release message is received.

3. The method according to claim 1 , wherein information about at least one parameter for operation in the target IoT mode is received in an RRC configuration message before the release of the RRC connection or in the RRC connection release message.

4. The method according to claim 1 , wherein the communication device monitors a paging message based on the target IoT mode after the release of the RRC connection.

5. The method according to claim 1 , wherein the communication device tests whether operation in the target IoT mode satisfies a predetermined condition, before the release of the RRC connection.

6. A communication device operating in a wireless communication system, the communication device comprising:

at least one transceiver;

at least one processor; and

at least one memory operatively coupled to the at least one processor and storing instructions which when executed, cause the at least one processor to perform specific operations,

wherein the specific operations include:

transmitting a radio resource control (RRC) connection release request message including information about at least one preferred target Internet of things (IoT) mode;

receiving a RRC connection release message including information about a target IoT mode based on the RRC connection release request message; and

releasing an RRC connection based on the RRC connection release message,

wherein the communication device switches from a source IoT mode to the target IoT mode based on the information about the target IoT mode and the target IoT mode is determined based on the information about the at least one preferred target IoT mode.

7. The communication device according to claim 6 , wherein the communication device switches from the source IoT mode to the target IoT mode simultaneously with the release of the RRC connection or at a time within a predetermined period from a time when the RRC connection release message is received.

8. The communication device according to claim 6 , wherein information about at least one parameter for operation in the target IoT mode is received in an RRC configuration message before the release of the RRC connection or in the RRC connection release message.

9. The communication device according to claim 6 , wherein the communication device monitors a paging message based on the target IoT mode after the release of the RRC connection.

10. The communication device according to claim 6 , wherein the communication device tests whether operation in the target IoT mode satisfies a predetermined condition, before the release of the RRC connection.

11. The communication device according to claim 6 , wherein the communication device includes an autonomous driving vehicle communicable with at least a user equipment (UE), a network, and another autonomous driving vehicle other than the communication device.