5G NR FR2 beam management enhancements
Apparatuses, systems, and methods for a user equipment device (UE) to perform methods for Fifth Generation New Radio (5G NR) frequency range two (FR2) based communications beam management. The UE may configure, via communications with a base station, serving the UE, a group ID for PUCCH resources within a group of PUCCHs, e.g., for FR2 based communications. The UE may receive, from the base station, an update to one or more PUCCH resources within the group of PUCCHs via a medium access control (MAC) control element (CE) that may include one of a resource ID indicating an update to a PUCCH resource or the group ID to update the group of PUCCH resources. The UE may update, based on the MAC-CE, the one or more PUCCH resources within the group of PUCCHs.
1. A method for frequency range two (FR2) beam management, comprising:
configuring, via communications with a base station, a group identifier (ID) for physical uplink control channel (PUCCH) resources within a group of PUCCHs;
updating, based on a medium access control (MAC) control element (CE) received from the base station, one or more PUCCH resources within the group of PUCCHs, wherein the MAC CE includes one of a resource ID or the group ID;
receiving, from the base station, an update to a pathloss measurement reference signal (RS); and
continuing, when the updated pathloss measurement RS cannot be measured at least once prior to transmission of a subsequent signal, to use a pathloss estimate from a prior RS to determine an uplink open loop transmit power until a pathloss can be measured from the updated pathloss measurement RS.
2. The method of claim 1 ,
wherein the subsequent signal comprises at least one of:
a sounding reference signal;
a physical uplink shared channel; or
a physical uplink control channel.
3. The method of claim 1 , further comprising:
attaching to the base station, wherein attaching to the base station comprises exchanging one or more configuration messages with the base station.
4. The method of claim 1 ,
wherein the update to the pathloss measurement RS is received via a reconfiguration indication.
5. The method of claim 4 ,
wherein the reconfiguration indication comprises a medium access control (MAC) control element (CE).
6. The method of claim 1 ,
wherein configuring the group ID comprises exchanging radio resource control (RRC) messages during a PUCCH configuration procedure.
7. An apparatus, comprising:
a memory; and
at least one processor in communication with the memory and configured to:
configure, via communications with a base station, a group identifier (ID) for physical uplink control channel (PUCCH) resources within a group of PUCCHs;
update, based on a medium access control (MAC) control element (CE) received from the base station, one or more PUCCH resources within the group of PUCCHs, wherein the MAC CE includes one of a resource ID or the group ID;
receive, from the base station, an update to a pathloss measurement reference signal (RS); and
continue, when the updated pathloss measurement RS cannot be measured at least once prior to transmission of a subsequent signal, to use a pathloss estimate from a prior RS to determine an uplink open loop transmit power until a pathloss can be measured from the updated pathloss measurement RS.
8. The apparatus of claim 7 ,
wherein the subsequent signal comprises at least one of:
a sounding reference signal;
a physical uplink shared channel; or
a physical uplink control channel.
9. The apparatus of claim 7 ,
wherein the at least one processor is further configured to generate instructions to attach to the base station, and wherein to attach to the base station, the at least one processor is further configured to generate instructions to exchange one or more configuration messages with the base station.
10. The apparatus of claim 7 ,
wherein the update to the pathloss measurement RS is received via a reconfiguration indication.
11. The apparatus of claim 10 ,
wherein the reconfiguration indication comprises a medium access control (MAC) control element (CE).
12. The apparatus of claim 7 ,
wherein to configure the group ID, the at least one processor is further configured to generate instructions to exchange radio resource control (RRC) messages during a PUCCH configuration procedure.
13. A user equipment device (UE), comprising:
at least one antenna;
at least one radio, wherein the at least one radio is configured to perform cellular communication using at least one radio access technology (RAT); and
one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform voice and/or data communications;
wherein the one or more processors are configured to cause the UE to:
configure, via communications with a base station, a group identifier (ID) for physical uplink control channel (PUCCH) resources within a group of PUCCHs;
update, based on a medium access control (MAC) control element (CE) received from the base station, one or more PUCCH resources within the group of PUCCHs, wherein the MAC CE includes one of a resource ID or the group ID;
receive, from the base station, an update to a pathloss measurement reference signal (RS); and
continue, when the updated pathloss measurement RS cannot be measured at least once prior to transmission of a subsequent signal, to use a pathloss estimate from a prior RS to determine an uplink open loop transmit power until a pathloss can be measured from the updated pathloss measurement RS.
14. The UE of claim 13 ,
wherein the subsequent signal comprises at least one of:
a sounding reference signal;
a physical uplink shared channel; or
a physical uplink control channel.
15. The UE of claim 13 ,
wherein the one or more processors are further configured to generate instructions to attach to the base station, and wherein to attach to the base station, the one or more processors are further configured to cause the UE to exchange one or more configuration messages.
16. The UE of claim 13 ,
wherein the update to the pathloss measurement RS is received via a reconfiguration indication.
17. The UE of claim 16 ,
wherein the reconfiguration indication comprises a medium access control (MAC) control element (CE).
18. The method of claim 1 , further comprising:
reporting, to the base station, a minimum latency requirement for switching antenna panels; and
in response to the base station violating the minimum latency requirement, determining an antenna panel to use without input from the base station.
19. The method of claim 1 , further comprising:
reporting, to the base station, a minimum latency requirement for switching antenna panels; and
in response to the base station violating the minimum latency requirement, determining an antenna panel to use based on a pre-specified configuration.
20. The method of claim 19 ,
wherein the pre-specified configuration includes one of selecting a beam used for a control resource set (CORESET) with a lowest ID in a current active antenna panel or selecting a last beam used for reception or transmission in a current active antenna panel.