Method and apparatus for uplink beam management in next generation wireless systems
A method of a user equipment (UE) for beam management in a wireless communication system is provided. The method comprises receiving, from a base station (BS), a downlink message comprising configuration information that includes a direction of Tx beam and a pattern of the beam sweeping of a set of transmit (Tx) beams for sounding reference signals (SRSs); determining information comprising the direction of the Tx beam and the pattern of the beam sweeping of the set of Tx beams; and transmitting, to the BS, an uplink message including a number of the SRSs for the beam management of the set of Tx beams in accordance with the configuration information.
1. A user equipment (UE) for transmitting a sounding reference signal (SRS) in a wireless communication system, the UE comprising:
a transceiver configured to receive, from a base station, SRS configuration information including a configuration on a SRS resource set, the SRS resource set including a plurality of SRS resources; and
a processor operably connected to the transceiver, the processor configured to identify an SRS power based on pathloss information, a parameter P O , and a parameter α,
wherein the transceiver is further configured to transmit, to the base station, SRSs corresponding to the SRS resource set based on the identified SRS power,
wherein the parameter P O and the parameter α are configured for the SRS resource set by a higher layer signaling, and
wherein the pathloss information for the SRS resource set is identified based on a synchronization signal (SS) block index or a channel state information reference signal (CSI-RS) which is configured by the base station.
2. The UE of claim 1 , wherein:
the transceiver is further configured to transmit capability information to the base station,
the capability information includes a maximum number of SRS resources per SRS resource set and a maximum number of SRS resources sets.
3. The UE of claim 1 , wherein, when the SRS resource set is configured for beam measurement, an SRS corresponding to an SRS resource among the plurality of SRS resources is transmitted in a transmission occasion.
4. The UE of claim 1 , wherein:
transmission beam information corresponding to an SRS resource is configured by the base station, and
an SRS corresponding to the SRS resource is transmitted based on a transmission beam indicated by the transmission beam information.
5. The UE of claim 1 , wherein:
the transceiver is further configured to:
receive at least one SRS resource indicator (SRI) included in downlink control information when an uplink transmission to which a transmission beam is applied is configured by the base station; and
transmit uplink data based on the at least one SRI, and
the SRI is associated with a latest SRS transmission.
6. A base station for receiving a sounding reference signal (SRS) in a wireless communication system, the base station comprising:
a processor configured to generate SRS configuration information including a configuration on a SRS resource set, the SRS resource set including a plurality of SRS resources; and
a transceiver operably connected to the processor, the transceiver configured to:
transmit, to a user equipment (UE), the SRS configuration information; and
receive, from the UE, SRSs corresponding to the SRS resource set transmitted based on an SRS power identified based on based on pathloss information, a parameter P O , and a parameter α,
wherein the parameter P O and the parameter α are configured for the SRS resource set by a higher layer signaling, and
wherein the pathloss information for the SRS resource set is indicated based on a synchronization signal (SS) block index or a channel state information reference signal (CSI-RS) which is configured by the base station.
7. The base station of claim 6 , wherein:
the transceiver is further configured to receive capability information from the UE,
the capability information includes a maximum number of SRS resources per SRS resource set and a maximum number of SRS resources sets.
8. The base station of claim 6 , wherein, when the SRS resource set is configured for beam measurement, an SRS corresponding to an SRS resource among the plurality of SRS resources is transmitted in a transmission occasion.
9. The base station of claim 6 , wherein:
transmission beam information corresponding to an SRS resource is configured by the base station, and
an SRS corresponding to the SRS resource is transmitted based on a transmission beam indicated by the transmission beam information.
10. The base station of claim 6 , wherein:
the transceiver is further configured to:
transmit at least one SRS resource indicator (SRI) included in downlink control information when an uplink transmission to which a transmission beam is applied is configured by the base station; and
receive uplink data based on the at least one SRI, and
the SRI is associated with a latest SRS transmission.
11. A method of transmitting a sounding reference signal (SRS) in a wireless communication system, the method comprising:
receiving, from a base station, SRS configuration information including a configuration on a SRS resource set, the SRS resource set including a plurality of SRS resources;
identifying an SRS power based on pathloss information, a parameter P O , and a parameter α; and
transmitting, to the base station, SRSs corresponding to the SRS resource set based on the identified SRS power,
wherein the parameter P O and the parameter α are configured for the SRS resource set by a higher layer signaling, and
wherein the pathloss information for the SRS resource set is identified based on a synchronization signal (SS) block index or a channel state information reference signal (CSI-RS) which is configured by the base station.
12. The method of claim 11 , further comprising:
transmitting capability information to the base station,
wherein the capability information includes a maximum number of SRS resources per SRS resource set and a maximum number of SRS resources sets.
13. The method of claim 11 , wherein, when the SRS resource set is configured for beam measurement, an SRS corresponding to an SRS resource among the plurality of SRS resources is transmitted in a transmission occasion.
14. The method of claim 11 , wherein:
transmission beam information corresponding to an SRS resource is configured by the base station, and
an SRS corresponding to the SRS resource is transmitted based on a transmission beam indicated by the transmission beam information.
15. The method of claim 11 , further comprising:
receiving at least one SRS resource indicator (SRI) included in downlink control information when an uplink transmission to which a transmission beam is applied is configured by the base station; and
transmitting uplink data based on the at least one SRI,
wherein the SRI is associated with a latest SRS transmission.
16. A method for receiving a sounding reference signal (SRS) by a base station in a wireless communication system, the method comprising:
generating SRS configuration information including a configuration on a SRS resource set, the SRS resource set including a plurality of SRS resources;
transmitting, to a user equipment (UE), the SRS configuration information; and
receiving, from the UE, SRSs corresponding to the SRS resource set transmitted based on an SRS power identified based on based on pathloss information, a parameter P O , and a parameter α,
wherein the parameter P O and the parameter α are configured for the SRS resource set by a higher layer signaling, and
wherein the pathloss information for the SRS resource set is indicated based on a synchronization signal (SS) block index or a channel state information reference signal (CSI-RS) which is configured by the base station.
17. The method of claim 16 , further comprising:
receiving capability information from the UE,
wherein the capability information includes a maximum number of SRS resources per SRS resource set and a maximum number of SRS resources sets.
18. The method of claim 16 , wherein, when the SRS resource set is configured for beam measurement, an SRS corresponding to an SRS resource among the plurality of SRS resources is transmitted in a transmission occasion.
19. The method of claim 16 , wherein:
transmission beam information corresponding to an SRS resource is configured by the base station, and
an SRS corresponding to the SRS resource is transmitted based on a transmission beam indicated by the transmission beam information.
20. The method of claim 16 , further comprising:
transmitting at least one SRS resource indicator (SRI) included in downlink control information when an uplink transmission to which a transmission beam is applied is configured by the base station; and
receiving uplink data based on the at least one SRI,
wherein the SRI is associated with a latest SRS transmission.