Measurement and scheduling of intra-frequency and inter-frequency reference signals
Aspects relate to measuring and scheduling reference signals. A user equipment (UE) detects reference signals having overlapping resources, and determines a context associated with the reference signals. A Layer 1 (L1) measurement is then performed of at least one reference signal according to a prioritization associated with the context. In another aspect, a network entity determines a scheduling of resources that enables a UE to prioritize performing an L1 measurement of a reference signal from a non-serving cell, and communicates with the UE according to the scheduling. In yet another aspect, a UE communicates with a gNb using transmission configuration indication (TCI) states associated with a corresponding control resource set (CORESET) pool of CORESETs. Beam failure detection (BFD) reference signals are then identified explicitly via a configuration signaling, or implicitly based on the TCI states. The BFD reference signals are then monitored to facilitate detecting a beam failure event.
1 . A user equipment (UE), comprising:
a transceiver;
a memory; and
a processor coupled to the transceiver and the memory, wherein the processor is configured to:
communicate with a gNodeB (gNb) using one or more transmission configuration indication (TCI) states, wherein each of the one or more TCI states is associated with a corresponding control resource set (CORESET) pool of one or more CORESETs, and wherein each CORESET pool corresponds to a transmission reception point (TRP);
determine whether a configuration signaling associated with one or more sets of beam failure detection (BFD) reference signals from the gNb is present;
identify the one or more sets of the BFD reference signals explicitly via the configuration signaling from the gNb in response to determining a presence of the configuration signaling;
identify the one or more sets of BFD reference signals implicitly based on the one or more TCI states in response to determining an absence of the configuration signaling;
monitor the one or more sets of BFD reference signals to facilitate detecting a beam failure event;
receive a scheduling command of a communication assignment via a particular CORESET pool; and
select a TCI state associated with the particular CORESET pool for the communication assignment from the one or more TCI states.
2 . The UE of claim 1 , wherein the processor is configured to identify a single set of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state, and wherein the processor is further configured to associate the single set of BFD reference signals with every TRP of a cell.
3 . The UE of claim 1 , wherein the processor is configured to identify a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a plurality of TCI states, and wherein the processor is further configured to associate the plurality of sets of BFD reference signals with a corresponding plurality of TRPs of a cell.
4 . The UE of claim 3 , wherein the processor is configured to detect the beam failure event at a TRP level.
5 . The UE of claim 3 , wherein the processor is configured to detect the beam failure event at a cell level.
6 . The UE of claim 1 , wherein the processor is configured to identify a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state, and wherein the processor is further configured to implicitly select multiple sets of BFD reference signals based on the single TCI state and a previously indicated TCI state.
7 . The UE of claim 1 , wherein the processor is configured to identify a plurality of sets of BFD reference signals when the UE has not received an indication signaling of a TCI state.
8 . The UE of claim 1 , wherein the processor is configured to:
identify a plurality of sets of BFD reference signals based on an activated TCI codepoint that includes a plurality of TCI states;
select a TCI codepoint having a lowest identifier among all TCI codepoints with two or more TCI states; and
identify BFD reference signals to monitor using the two or more TCI states included in the selected TCI codepoint.
9 . The UE of claim 1 , wherein the one or more sets of BFD reference signals are source reference signals associated with the one or more TCI states.
10 . The UE of claim 1 , wherein the communication assignment is a type corresponding to one of a semi-persistent/aperiodic (SP/AP) channel state information reference signal (CSI-RS) for a tracking reference signal, a channel state feedback, a beam management, an SP/AP sounding reference signal (SRS) for antenna switching, a codebook based transmission, a non-codebook based transmission, a physical downlink control channel (PDCCH) order based physical random access channel (PRACH), SP/AP physical uplink shared channel (PUSCH), or SP/AP physical uplink control channel (PUCCH).
11 . A method of wireless communication performed by a user equipment (UE), comprising:
communicating with a gNodeB (gNb) using one or more transmission configuration indication (TCI) states, wherein each of the one or more TCI states is associated with a corresponding control resource set (CORESET) pool of one or more CORESETs, and wherein each CORESET pool corresponds to a transmission reception point (TRP);
determining whether a configuration signaling associated with one or more sets of beam failure detection (BFD) reference signals from the gNb is present;
identifying the one or more sets of the BFD reference signals explicitly via the configuration signaling from the gNb in response to determining a presence of the configuration signaling;
identifying the one or more sets of BFD reference signals implicitly based on the one or more TCI states in response to determining an absence of the configuration signaling;
monitoring the one or more sets of BFD reference signals to facilitate detecting a beam failure event;
receiving a scheduling command of a communication assignment via a particular CORESET pool; and
selecting a TCI state associated with the particular CORESET pool for the communication assignment from the one or more TCI states.
12 . The method of claim 11 , further comprising:
identifying a single set of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state;
associating the single set of BFD reference signals with every TRP of a cell.
13 . The method of claim 11 , further comprising:
identifying a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a plurality of TCI states; and
associating the plurality of sets of BFD reference signals with a corresponding plurality of TRPs of a cell.
14 . The method of claim 13 , further comprising:
detecting the beam failure event at a TRP level.
15 . The method of claim 13 , further comprising:
detecting the beam failure event at a cell level.
16 . The method of claim 11 , further comprising:
identifying a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state; and
implicitly selecting multiple sets of BFD reference signals based on the single TCI state and a previously indicated TCI state.
17 . The method of claim 11 , further comprising:
identifying a plurality of sets of BFD reference signals when the UE has not received an indication signaling of a TCI state.
18 . The method of claim 11 , further comprising:
identifying a plurality of sets of BFD reference signals based on an activated TCI codepoint that includes a plurality of TCI states;
selecting a TCI codepoint having a lowest identifier among all TCI codepoints with two or more TCI states; and
identifying BFD reference signals to monitor using the two or more TCI states included in the selected TCI codepoint.
19 . The method of claim 11 , wherein the one or more sets of BFD reference signals are source reference signals associated with the one or more TCI states.
20 . The method of claim 11 , wherein the communication assignment is a type corresponding to one of a semi-persistent/aperiodic (SP/AP) channel state information reference signal (CSI-RS) for a tracking reference signal, a channel state feedback, a beam management, an SP/AP sounding reference signal (SRS) for antenna switching, a codebook based transmission, a non-codebook based transmission, a physical downlink control channel (PDCCH) order based physical random access channel (PRACH), SP/AP physical uplink shared channel (PUSCH), or SP/AP physical uplink control channel (PUCCH).
21 . A user equipment (UE), comprising:
means for communicating with a gNodeB (gNb) using one or more transmission configuration indication (TCI) states, wherein each of the one or more TCI states is associated with a corresponding control resource set (CORESET) pool of one or more CORESETs, and wherein each CORESET pool corresponds to a transmission reception point (TRP);
means for determining whether a configuration signaling associated with one or more sets of beam failure detection (BFD) reference signals from the gNb is present;
means for identifying the one or more sets of the BFD reference signals explicitly via the configuration signaling from the gNb in response to determining a presence of the configuration signaling;
means for identifying the one or more sets of BFD reference signals implicitly based on the one or more TCI states in response to determining an absence of the configuration signaling;
means for monitoring the one or more sets of BFD reference signals to facilitate detecting a beam failure event;
means for receiving a scheduling command of a communication assignment via a particular CORESET pool; and
means for selecting a TCI state associated with the particular CORESET pool for the communication assignment from the one or more TCI states.
22 . The UE of claim 21 , further comprising:
means for identifying a single set of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state;
means for associating the single set of BFD reference signals with every TRP of a cell.
23 . The UE of claim 21 , further comprising:
means for identifying a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a plurality of TCI states; and
means for associating the plurality of sets of BFD reference signals with a corresponding plurality of TRPs of a cell.
24 . The UE of claim 23 , further comprising:
means for detecting the beam failure event at a TRP level.
25 . The UE of claim 23 , further comprising:
means for detecting the beam failure event at a cell level.
26 . The UE of claim 21 , further comprising:
means for identifying a plurality of sets of BFD reference signals based on an indication signaling received from the gNb corresponding to a single TCI state; and
means for implicitly selecting multiple sets of BFD reference signals based on the single TCI state and a previously indicated TCI state.
27 . The UE of claim 21 , further comprising:
means for identifying a plurality of sets of BFD reference signals when the UE has not received an indication signaling of a TCI state.
28 . The UE of claim 21 , further comprising:
means for identifying a plurality of sets of BFD reference signals based on an activated TCI codepoint that includes a plurality of TCI states;
means for selecting a TCI codepoint having a lowest identifier among all TCI codepoints with two or more TCI states; and
means for identifying BFD reference signals to monitor using the two or more TCI states included in the selected TCI codepoint.