Method and apparatus for transmitting data in wireless communication system
The present disclosure relates to 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), and 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. The present disclosure describes methods for supporting uplink sub-band precoding for effective data transmission and reception, reporting a failure of channel state measurement of a terminal, and reporting a channel state according to multiple channel state information reference signal (CSI-RS) transmission.
1. A method of a terminal for a communication system, the method comprising:
receiving sounding reference signal (SRS) configuration information from a base station, the SRS configuration information configuring a plurality of semi-persistent SRS resources for semi-persistent SRS transmission;
receiving activation information which indicates an activation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the activation information being included in a medium access control (MAC) control element;
periodically transmitting SRSs corresponding to the at least one activated semi-persistent SRS resource based on the activation information from a first timing, the first timing being determined as a timing after a predetermined period has elapsed since the activation information was received;
receiving deactivation information which indicates a deactivation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the deactivation information being included in a MAC control element; and
stopping SRS transmissions corresponding to the at least one deactivated semi-persistent SRS resource based on the deactivation information from a second timing, the second timing being determined as a timing after a predetermined period has elapsed since the deactivation information was received.
2. The method of claim 1 , further comprising:
identifying uplink precoding information for transmitting data based on the SRS configuration information.
3. The method of claim 1 , wherein the SRS configuration information includes information on an SRS transmission bandwidth, a number of antenna ports, information on a transmission comb, and a cyclic shift.
4. The method of claim 1 , wherein the SRS configuration information includes information on a channel state information reference signal (CSI-RS) resource corresponding to each semi-persistent SRS resource.
5. A method of a base station for a communication system, the method comprising:
transmitting sounding reference signal (SRS) configuration information to a terminal, the SRS configuration information configuring a plurality of semi-persistent SRS resources for semi-persistent SRS transmission;
transmitting activation information which indicates an activation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the activation information being included in a medium access control (MAC) control element;
periodically receiving SRSs corresponding to the at least one activated semi-persistent SRS resource from first timing, the first time being determined as a timing after a predetermined period has elapsed since the activation information was transmitted; and
transmitting deactivation information which indicates a deactivation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the deactivation information being included in a MAC control element,
wherein SRS receptions corresponding to the at least one deactivated semi-persistent SRS resource is not performed from second timing, the second timing being determined as a timing after a predetermined period has elapsed since the deactivation information was transmitted.
6. The method of claim 5 , wherein uplink precoding information for receiving data is identified based on the SRS configuration information.
7. The method of claim 5 , wherein the SRS configuration information includes information on an SRS transmission bandwidth, a number of antenna ports, information on a transmission comb, and a cyclic shift.
8. The method of claim 5 , wherein the SRS configuration information includes information on a channel state information reference signal (CSI-RS) resource corresponding to each semi-persistent SRS resource.
9. A terminal for a communication system, the terminal comprising:
a transceiver; and
a processor coupled with the transceiver and configured to control to:
receive, from a base station via the transceiver, sounding reference signal (SRS) configuration information, the SRS configuration information configuring a plurality of semi-persistent SRS resources for semi-persistent transmission,
receive, from the base station, activation information which indicates an activation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the activation information being included in a medium access control (MAC) control element,
periodically transmit SRSs corresponding to the at least one activated semi-persistent SRS resource based on the activation information from a first timing, the first timing being determined as a timing after a predetermined period has elapsed since the activation information was received,
receive, from the base station, deactivation information which indicates a deactivation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the deactivation information being included in a MAC control element, and
stop SRS transmissions corresponding to the at least one deactivated semi-persistent SRS resource based on the deactivation information from a second timing, the second timing being determined as a timing after a predetermined period has elapsed since the deactivation information was received.
10. The terminal of claim 9 , wherein the processor is further configured to control to identify uplink precoding information for transmitting data based on the SRS configuration information.
11. The terminal of claim 9 , wherein the SRS configuration information includes information on an SRS transmission bandwidth, a number of antenna ports, information on a transmission comb, and a cyclic shift.
12. The terminal of claim 9 , wherein the SRS configuration information includes information on a channel state information reference signal (CSI-RS) resource corresponding to each semi-persistent SRS resource.
13. A base station for a communication system, the base station comprising:
a transceiver; and
a processor coupled with the transceiver and configured to control to:
transmit, to a terminal via the transceiver, sounding reference signal (SRS) configuration information to a terminal, the SRS configuration information configuring a plurality of semi-persistent SRS resources for semi-persistent SRS transmission,
transmit, to the terminal, activation information which indicates an activation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the activation information being included in a medium access control (MAC) control element,
periodically receive SRSs corresponding to the at least one activated semi-persistent SRS resource from a first timing, the first timing being determined as a timing after a predetermined period has elapsed since the activation information was transmitted, and
transmit, to the terminal, deactivation information which indicates a deactivation of at least one semi-persistent SRS resource of the plurality of semi-persistent SRS resources, the deactivation information being included in a MAC control element,
wherein SRS receptions corresponding to the at least one deactivated semi-persistent SRS resource is not performed from a second timing, the second timing being determined as a timing after a predetermined period has elapsed since the deactivation information was transmitted.
14. The base station of claim 13 , wherein uplink precoding information for receiving data is identified based on the SRS configuration information.
15. The base station of claim 13 , wherein the SRS configuration information includes information on an SRS transmission bandwidth, a number of antenna ports, information on a transmission comb, and a cyclic shift.
16. The base station of claim 13 , wherein the SRS configuration information includes information on a channel state information reference signal (CSI-RS) resource corresponding to each semi-persistent SRS resource.