Method and apparatus for transmitting and receiving signal through beamforming in communication system
A communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT) is disclosed. It may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A signal transmission and reception method implemented by a terminal of a mobile communication system is provided. The terminal receives first information including a request for beam related information from a base station and transmits second information including the beam related information based on the first information to the base station. The terminal changes at least one of a Tx beam or a Rx beam associated with the base station, based on the first information and the second information.
1. A method of transmitting and receiving a signal by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, a reference signal for a measurement of at least one beam;
transmitting, to the base station, first information on a result of the measurement;
receiving, from the base station, second information indicating a beam among the at least one beam, the second information being received in a first subframe;
determining a second subframe based on the second information, wherein the second subframe is a subframe after a number of subframes from the first subframe, and the beam is applied from the second subframe; and
communicating with the base station by using the beam from the second subframe.
2. The method of claim 1 ,
wherein the second information indicating the beam is included in downlink control information scheduling an uplink signal, and
wherein the second subframe is determined as at least one of a first timing of transmitting uplink signal based on an uplink grant included in the downlink control information, a second timing before receiving an acknowledgement in response to the uplink signal, or a third timing after receiving the acknowledgement in response to the received acknowledgement.
3. The method of claim 1 ,
wherein the second information indicating the beam is included in downlink control information scheduling a downlink signal, and
wherein the second subframe is determined as at least one of: a first timing of receiving downlink signal based on a downlink grant included in the downlink control information, a second timing before transmitting an acknowledgement in response to the downlink signal, or a third timing after transmitting the acknowledgement in response to the transmitted acknowledgement.
4. The method of claim 1 ,
wherein the second information indicating the beam is included in a medium access control control element (MAC CE), and
wherein the second subframe is determined as a timing after transmitting an acknowledgement in response to the MAC CE.
5. The method of claim 1 ,
further comprising receiving, from the base station, a value for determining the number of subframes by an upper layer signaling or in downlink control information.
6. A method of transmitting and receiving a signal by a base station in a wireless communication system, the method comprising:
transmitting, to a terminal, a reference signal for a measurement of at least one beam;
receiving, from the terminal, first information on a result of the measurement;
transmitting, to the terminal, second information indicating a beam among the at least one beam, the second information being transmitted in a first subframe; and
communicating with the terminal by using the beam from a second subframe,
wherein the second subframe is a subframe after a number of subframes from the first subframe, and
wherein the second subframe is determined based on the second information.
7. The method of claim 6 ,
wherein the second information indicating the beam is included in downlink control information scheduling an uplink signal, and
wherein the second subframe is determined as at least one of: a first timing of receiving uplink signal based on an uplink grant included in the downlink control information, a second timing before transmitting an acknowledgement in response to the uplink signal, or a third timing after transmitting the acknowledgement in response to the transmitted acknowledgement.
8. The method of claim 6 ,
wherein the second information indicating the beam is included in downlink control information scheduling a downlink signal, and
wherein the second subframe is determined as at least one of: a first timing of transmitting downlink signal based on a downlink grant included in the downlink control information, a second timing before receiving an acknowledgement in response to the downlink signal, or a third timing after receiving the acknowledgement in response to the received acknowledgement.
9. The method of claim 6 ,
wherein the second information indicating the beam is included in a medium access control control element (MAC CE), and
wherein the second subframe is determined as a timing after receiving an acknowledgement in response to the MAC CE.
10. The method of claim 6 ,
further comprising transmitting, to the terminal, a value for determining the number of subframes by an upper layer signaling or in downlink control information.
11. A terminal of transmitting and receiving a signal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
receive, from a base station, a reference signal for a measurement of at least one beam,
transmit, to the base station, first information on a result of the measurement,
receive, from the base station, second information indicating a beam among the at least one beam, the second information being received in a first subframe,
determine a second subframe based on the second information, wherein the second subframe is a subframe after a number of subframes from the first subframe, and the beam is applied from the second subframe, and
communicate with the base station by using the beam from the second subframe.
12. The terminal of claim 11 ,
wherein the second information indicating the beam is included in downlink control information scheduling an uplink signal, and
wherein the second subframe is determined as at least one of: a first timing of transmitting uplink signal based on an uplink grant included in the downlink control information, a second timing before receiving an acknowledgement in response to the uplink signal, or a third timing after receiving the acknowledgement in response to the received acknowledgement.
13. The terminal of claim 11 ,
wherein the second information indicating the beam is included in downlink control information scheduling a downlink signal, and
wherein the second subframe is determined as at least one of: a first timing of receiving downlink signal based on a downlink grant included in the downlink control information, a second timing before transmitting an acknowledgement in response to the downlink signal, or a third timing after transmitting the acknowledgement in response to the transmitted acknowledgement.
14. The terminal of claim 11 ,
wherein the second information indicating the beam is included in a medium access control control element (MAC CE), and
wherein the second subframe is determined as a timing after transmitting an acknowledgement in response to the MAC CE.
15. The terminal of claim 11 ,
wherein the at least one processor is configured to receive, from the base station, a value for determining the number of subframes by an upper layer signaling or in downlink control information.
16. A base station of transmitting and receiving a signal in a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
at least one processor configured to:
transmit, to a terminal, a reference signal for a measurement of at least one beam,
receive, from the terminal, first information on a result of the measurement,
transmit, to the terminal, second information indicating a beam among the at least one beam, the second information being transmitted in a first subframe, and
communicate with the terminal by using the beam from a second subframe,
wherein the second subframe is a subframe after a number of subframes from the first subframe, and
wherein the second subframe is determined based on the second information.
17. The base station of claim 16 ,
wherein the second information indicating the beam is included in downlink control information scheduling an uplink signal, and
wherein the second subframe is determined as at least one of: a first timing of receiving uplink signal based on an uplink grant included in the downlink control information, a second timing before transmitting an acknowledgement in response to the uplink signal, or a third timing after transmitting the acknowledgement in response to the transmitted acknowledgement.
18. The base station of claim 16 ,
wherein the second information indicating the beam is included in downlink control information scheduling a downlink signal, and
wherein the second subframe is determined as at least one of: a first timing of transmitting downlink signal based on a downlink grant included in the downlink control information, a second timing before receiving an acknowledgement in response to the downlink signal, or a third timing after receiving the acknowledgement in response to the received acknowledgement.
19. The base station of claim 16 ,
wherein the second information indicating the beam is included in a medium access control control element (MAC CE), and
wherein the second subframe is determined as a timing after receiving an acknowledgement in response to the MAC CE.
20. The base station of claim 16 ,
wherein the at least one processor is configured to transmit, to the terminal, a value for determining the number of subframes by an upper layer signaling or in downlink control information.