Method and device for performing communication with virtual terminal in wireless communication system
Provided is a method and device for performing communication with a virtual terminal in a wireless communication system. A base station determines a second plurality of virtual terminals, to which downlink data is to be transmitted, among a first plurality of virtual terminals constituting an actual terminal, transmits control information for transmitting the downlink data to at least one virtual terminal of the second plurality of virtual terminals, and transmits the downlink data to the second plurality of terminals. The actual terminal may be a vehicle terminal, and each of the first plurality of virtual terminals may comprise at least one of a plurality of distributed antenna arrays installed in the vehicle terminal.
1. A method performed by an eNodeB (eNB) in a wireless communication system, the method comprising:
receiving information on channel state of a plurality of virtual terminals constituting an actual terminal;
determining a group of virtual terminals to which downlink data is to be transmitted, among the plurality of virtual terminals, based on the information on the channel state of the plurality of virtual terminals;
transmitting control information for transmission of the downlink data to a representative virtual terminal, wherein the control information includes indexes of the determined group of virtual terminals; and
transmitting the downlink data to the group of virtual terminals,
wherein the control information is transferred to the group of virtual terminals by the representative virtual terminal based on the indexes included in the control information, and
wherein the plurality of virtual terminals are configured with one bearer.
2. The method of claim 1 , wherein the control information is downlink control information (DCI) including common control information.
3. The method of claim 2 , wherein the DCI further includes control information about all of the plurality of virtual terminals, and
wherein a length of the DCI is fixed.
4. The method of claim 2 , wherein the DCI further includes only control information about virtual terminals belonging to the group of virtual terminals among the plurality of virtual terminals, and
wherein a length of the DCI is adaptive.
5. The method of claim 2 , wherein the DCI further includes at least one of a modulation and coding scheme (MCS), a hybrid automatic repeat request (HARD), a transmit power command (TPC), a new data indicator (NDI), a redundancy version (RV), or transmission precoder information.
6. The method of claim 1 , wherein the actual terminal is a vehicle terminal, and
wherein each of the plurality of virtual terminals includes at least one of a plurality of distributed antenna arrays installed in the vehicle terminal.
7. The method of claim 1 , wherein the actual terminal is related to one global UE identity (ID) or a user equipment (UE) performing communication to support one service.
8. The method of claim 1 , wherein the actual terminal includes a central unit (CU) controlling the plurality of virtual terminals.
9. An eNodeB (eNB) in a wireless communication system, the eNB comprising:
a transceiver; and
a processor, connected to the transceiver, that:
controls the transceiver to receive information on channel state of a plurality of virtual terminals constituting an actual terminal;
determines a group of virtual terminals to which downlink data is to be transmitted, among the plurality of virtual terminals, based on the information on the channel state of the plurality of virtual terminals,
controls the transceiver to transmit control information for transmission of the downlink data to a representative virtual terminal, wherein the control information includes indexes of the determined group of virtual terminals, and
controls the transceiver to transmit the downlink data to the group of virtual terminals,
wherein the control information is transferred to the group of virtual terminals by the representative virtual terminal based on the indexes included in the control information, and
wherein the plurality of virtual terminals are configured with one bearer.
10. The method of claim 1 , wherein the plurality of virtual terminals provide same quality of service (QoS).