Communication method and communication system for reducing overhead of reference signal
According to the present disclosure, disclosed is a communication method for reducing an overhead of a reference signal. The communication method according to the present disclosure comprises the steps in which: a reception unit receives a reference signal from a transmission unit; the reception unit obtains channel state information on the basis of the reference signal; the reception unit obtains loss information on the basis of the channel state information; the reception unit selects a mask to be applied to the reference signal on the basis of the quality of the loss information; and the reception unit transmits the selected mask to the transmission unit. The terminal of the present disclosure can be linked to an artificial intelligence module, a drone (unmanned aerial vehicle (UAV)), a robot, an augmented reality (AR) device, a virtual reality (VR) device, a device related to 6G services, and the like.
1 . A method comprising:
receiving, by a receiver, a first reference signal from a transmitter;
obtaining, by the receiver, channel state information based on the first reference signal;
obtaining, by the receiver, loss information based on the channel state information;
selecting, by the receiver, a mask to be applied to the first reference signal based on a quality of the loss information;
transmitting, by the receiver, the selected mask to the transmitter, and
receiving a second reference signal from the transmitter,
wherein the second reference signal is a signal that at least one channel component is omitted from the first reference signal by the transmitter based on the mask.
2 . The method of claim 1 ,
wherein “0” or a data signal is transmitted by the transmitter on the at least one channel component omitted from the first reference signal.
3 . The method of claim 2 , further comprising:
restoring, by the receiver, the at least one channel component using the mask.
4 . The method of claim 1 ,
wherein the obtaining, by the receiver, loss information comprises:
obtaining loss information for each of candidate masks by applying each of the candidate masks to channel estimation information; and
selecting, among the candidate masks, a mask having a highest quality of the loss information as the mask.
5 . The method of claim 4 ,
wherein obtaining a quality of the loss information comprises:
restoring the loss information using each of the candidate masks;
obtaining a difference value between the restored loss information and original data; and
selecting, among the candidate masks, a mask deriving the difference value as minimum as the mask.
6 . A receiver comprising:
one or more transceivers;
one or more processors; and
one or more memories including one or more instructions performed by the one or more processors,
wherein the one or more instructions comprise:
receiving a first reference signal from a transmitter;
obtaining channel state information based on the first reference signal;
obtaining loss information based on the channel state information;
selecting a mask to be applied to the first reference signal based on a quality of the loss information;
transmitting the selected mask to the transmitter; and
receiving a second reference signal from the transmitter,
wherein the second reference signal is a signal that at least one channel component is omitted from the first reference signal by the transmitter based on the mask.
7 . The receiver of claim 6 ,
wherein “0” or a data signal is transmitted by the transmitter on the at least one channel component omitted from the first reference signal.
8 . The receiver of claim 7 ,
wherein the receiver restores the at least one channel component using the mask.
9 . The receiver of claim 6 ,
wherein the receiver obtains loss information for each of candidate masks by applying each of the candidate masks to channel estimation information, and selects, among the candidate masks, a mask having a highest quality of the loss information as the mask.
10 . The receiver of claim 9 ,
wherein the receiver restores the loss information using each of the candidate masks, obtains a difference value between the restored loss information and original data, and selects, among the candidate masks, a mask deriving the difference value as minimum as the mask.