METHOD AND DEVICE FOR TRANSMITTING USER DATA THROUGH RANDOM ACCESS RESPONSE MESSAGE IN MOBILE COMMUNICATION SYSTEM

1 . A method of operating a terminal in a wireless communication system, the method comprising:

receiving, from a base station, a paging message comprising a dedicated preamble;

transmitting, to the base station, the dedicated preamble based on the paging message;

receiving, from the base station, a random access response (RAR) message based on the dedicated preamble;

in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the received RAR message, decoding the user data from the NAS container; and

inserting the user data into the message3 and transmitting the same to the base station.

2 . The method of claim 1 , further comprising transmitting, to the base station, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR.

3 . The method of claim 1 , further comprising receiving a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,

wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.

4 . The method of claim 1 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT.

5 . A method of operating a base station in a wireless communication system, the method comprising:

receiving, from a mobility management entity (MME), a paging comprising user data;

transmitting, to a terminal, a paging message comprising a dedicated preamble;

receiving, from the terminal, the dedicated preamble based on the paging message;

transmitting, to the terminal, a random access response (RAR) message based on the dedicated preamble; and

receiving message3 from the terminal,

wherein in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the RAR message, the user data is decoded by the terminal, and

wherein the decoded user data is inserted into the msg3.

6 . The method of claim 5 , further comprising receiving, from the terminal, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR.

7 . The method of claim 5 , further comprising transmitting a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,

wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.

8 . The method of claim 5 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT.

9 . A terminal comprising:

a transceiver capable of transmitting and receiving at least one signal; and

a controller connected to the transceiver,

wherein the controller is configured to

receive, from a base station, a paging message comprising a dedicated preamble,

transmit, to the base station, the dedicated preamble based on the paging message,

receive, from the base station, a random access response (RAR) message based on the dedicated preamble,

in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the received RAR message, decode the user data from the NAS container, and

insert the user data into the message3 and transmit the same to the base station.

10 . The terminal of claim 9 , wherein the controller is further configured to transmit, to the base station, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR.

11 . The terminal of claim 9 , wherein the controller is further configured to receive a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied, and

wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT.

12 . The terminal of claim 1 , wherein a subheader related to the DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT.

13 . A base station comprising:

a transceiver capable of transmitting and receiving at least one signal; and

a controller connected to the transceiver,

wherein the controller is configured to

receive, from a mobility management entity (MIME), a paging comprising user data,

transmit, to a terminal, a paging message comprising a dedicated preamble,

receive, from the terminal, the dedicated preamble based on the paging message,

transmit, to the terminal, a random access response (RAR) message based on the dedicated preamble, and

receive message3 from the terminal,

wherein in case that there is user data related to downlink early data transmission (DL EDT) in a non-access-stratum (NAS) container included in the RAR message, the user data is decoded by the terminal, and

wherein the decoded user data is inserted into the msg3.

14 . The base station of claim 13 , wherein the controller is further configured to further comprising receiving, from the terminal, UE capability information comprising an indicator indicating whether or not to support DL EDT using RAR.

15 . The base station of claim 13 , wherein the controller is further configured to transmit a physical downlink control channel (PDCCH) to which a separate radio network temporary identity (RNTI) is applied,

wherein the separate RNTI indicates that the paging message is configured as only the user data related to DL EDT, and

wherein a subheader related to DL EDT included in the RAR message is located after subheaders that are not related to the DL EDT.