Non-orthogonal transmission method and apparatus in communication system

1. An operation method of a first terminal in a communication system, comprising:

receiving, from a base station, a control message including a transmission indicator used for identifying the first terminal among a plurality of terminals performing uplink transmission, information on a first resource allocated for the transmission indicator, information on a preconfigured second resource mapped to the first resource, and information on a mapping relation of a third resource to the first resource, the third resource allocated for a response message from the base station;

transmitting the transmission indicator to the base station using the first resource allocated for the transmission indicator; and

after transmitting the transmission indicator, transmitting, without an uplink grant from the base station, an uplink signal to the base station using the preconfigured second resource mapped to the first resource.

2. The operation method according to claim 1 , wherein the transmission indicator is transmitted to the base station using an orthogonal resource allocated by the base station.

3. The operation method according to claim 1 , wherein the control message further includes information on a mapping relation between the first resource allocated for the transmission indicator and the preconfigured second resource, and the preconfigured second resource is indicated by the mapping relation.

4. The operation method according to claim 1 , wherein the preconfigured second resource is a non-orthogonal resource configured based on a Latin square matrix.

5. The operation method according to claim 1 , wherein the preconfigured second resource is selected from a resource pool configured between the base station and the first terminal.

6. The operation method according to claim 1 , wherein the uplink signal includes data and a reference signal, and the reference signal is generated based on a signature of the first terminal.

7. The operation method according to claim 1 , further comprising receiving the response message for the uplink signal from the base station, wherein the the response message is received through the third resource allocated for the response message indicated by the mapping relation.

8. An operation method of a base station in a communication system, comprising:

configuring resources for transmission indicators used for respectively identifying a plurality of terminals performing uplink transmission;

transmitting to a first terminal among the plurality of terminals a control message including information on a first resource allocated for a first transmission indicator for the first terminal, information on a preconfigured second resource mapped to the first resource, and information on a mapping relation of a third resource to the first resource, the third resource allocated for a response message from the base station;

receiving the first transmission indicator from the first terminal through the first resource allocated for the first transmission indicator; and

after receiving the first transmission indicator, performing a monitoring operation on the preconfigured second resource between the base station and the first terminal to receive a first uplink signal of the first terminal.

9. The operation method according to claim 8 , wherein the resources for transmission indicators are configured as orthogonal resources.

10. The operation method according to claim 8 , wherein the control message further includes information on a mapping relation between the first resource allocated for the first transmission indicator and the preconfigured second resource, and the preconfigured second resource is indicated by the mapping relation.

11. The operation method according to claim 8 , wherein the preconfigured second resource is a non-orthogonal resource configured based on a Latin square matrix.

12. The operation method according to claim 8 , wherein the first uplink signal includes data and a reference signal, and the reference signal is generated based on a signature of the first terminal.

13. The operation method according to claim 8 , further comprising:

identifying the first terminal using a reference signal included in the first uplink signal when the first uplink signal is received through the monitoring operation;

estimating a channel state between the base station and the identified first terminal; and

performing a demodulation and decoding operation on data included in the first uplink signal based on the estimated channel state.

14. The operation method according to claim 8 , further comprising, after successfully receiving the first uplink signal through the monitoring operation, transmitting a first response message for the first uplink signal to the first terminal using the third resource.

15. The operation method according to claim 14 , wherein the control message further includes information on a mapping relation between the first resource allocated for the first transmission indicator and the third resource allocated for the first response message, and the first response message is transmitted through a resource indicated by the mapping relation.

16. A first terminal in a communication system, comprising a processor and a memory storing at least one instruction executed by the processor, wherein the processor executing the at least one instruction is configured to:

receive, from a base station, a control message including information on a first resource allocated for a transmission indicator used for identifying the first terminal among a plurality of terminals performing uplink transmission, information on a mapping relation between the first resource and a preconfigured second resource for transmitting an uplink signal, and information on a mapping relation between the first resource and a third resource for receiving a response message for the uplink signal;

transmit the transmission indicator to the base station using the first resource allocated for the transmission indicator; and

after transmitting the transmission indicator, transmit a first uplink signal to the base station using the preconfigured second resource without an uplink grant.

17. The first terminal according to claim 16 , wherein the transmission indicator is transmitted to the base station using an orthogonal resource allocated by the base station.

18. The first terminal according to claim 16 , wherein the preconfigured resource is a non-orthogonal resource configured based on a Latin square matrix.

19. The first terminal according to claim 16 , wherein the processor executing the at least one instruction is further configured to receive a response message for the uplink signal from the base station, wherein the response message is received through the third resource allocated for the response message.