Network connection method of terminal using virtual UE system

1. A method for accessing, by a terminal, a network using a virtual user equipment (UE) scheme, the method comprising:

establishing a connection with a base station for a first distributed unit (DU) group including one or more DUs;

requesting, through an uplink channel allocated to the first DU group from the base station, that the base station establish a connection for a second DU group including one or more DUs; and

transmitting, to the base station over an uplink channel allocated to the second DU group, information indicating that the connection for the second DU group has been established when the base station approves the connection for the second DU group,

wherein requesting that the base station establish a connection for a second DU group comprises requesting that a connection preconfigured between the first DU group and the base station be reconfigured, and

wherein requesting that a connection preconfigured between the first DU group and the base station be reconfigured comprises:

transmitting information on at least one of whether or not Closed Loop Multi Input Multi Output (CL-MIMO) of the second DU group is supported, whether or not single port transmission or reception is performed, a maximum modulation and coding scheme (MCS) level, or a maximum rank number, and

transmitting an index value matching the information to the base station.

2. The method according to claim 1 , further comprising:

receiving a request for additional information on the second DU group from the base station in response to a request for the connection for the second DU group; and

transmitting information about a channel measured between the second DU group and the base station to the base station.

3. The method according to claim 1 , wherein the requesting comprises:

transmitting, to the base station, a preset index value for the one or more DUs included in the second DU group.

4. The method according to claim 1 , wherein the first DU group and the second DU group are separately recognized by the base station and are recognized as one object by an upper network entry.

5. The method according to claim 1 , wherein one bearer is shared between the first DU group and the second DU group.

6. The method according to claim 1 , wherein the one or more DUs included in the first DU group are distributed over a vehicle and connected to a central unit (CU).

7. A terminal for accessing a network using a virtual UE scheme, the terminal comprising:

a transmitter;

a receiver; and

a processor connected to the transmitter and the receiver,

wherein the processor is configured to:

establish a connection with a base station for a first distributed unit (DU) group including one or more DUs;

request, through an uplink channel allocated to the first DU group from the base station, that the base station establish a connection for a second DU group including one or more DUs; and

transmit, to the base station over an uplink channel allocated to the second DU group, information indicating that the connection for the second DU group has been established when the base station approves the connection for the second DU group,

wherein when the processor requests that the base station establish a connection for a second DU group, the processor is further configured to request that a connection preconfigured between the first DU group and the base station be reconfigured, and

wherein when the processor requests that a connection preconfigured between the first DU group and the base station be reconfigured, the processor is further configured to:

transmit information on at least one of whether or not Closed Loop Multi Input Multi Output (CL-MIMO) of the second DU group is supported, whether or not single port transmission or reception is performed, a maximum modulation and coding scheme (MCS) level, or a maximum rank number, and

transmit an index value matching the information to the base station.