Soft A/N report triggering for SPS PDSCH
To provide hybrid automatic repeat request (HARQ) feedback transmission with channel state information (CSI) report, a UE may receive triggering information associated with transmitting one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) occasions. The UE may receive a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH occasion of the one or more PDSCH occasions. The UE may transmit a first CSI report associated with the first DL SPS transmission based on receiving the triggering information.
1 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving triggering information associated with transmitting one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) occasions;
receiving a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH occasion of the one or more PDSCH occasions, wherein the first PDSCH occasion includes a first demodulation reference signal (DM-RS) of a first type of DM-RS;
transmitting a first CSI report associated with the first DL SPS transmission based on receiving the triggering information, wherein receiving the triggering information comprises receiving the first DM-RS, the first DM-RS triggering the UE to transmit the first CSI report; and
receiving a second DL SPS transmission in a second PDSCH occasion that is not associated with the triggering information, wherein the second PDSCH occasion includes a second DM-RS that is a second type of DM-RS different than the first type of DM-RS.
2 . The method of claim 1 , further comprising transmitting a first hybrid automatic repeat request (HARQ) feedback message comprising an acknowledgment (ACK) or a negative ACK (NACK) based on the receiving the first DL SPS transmission, wherein the first CSI report and the HARQ feedback message are transmitted in a same physical uplink control channel (PUCCH).
3 . The method of claim 2 , further comprising:
transmitting a second HARQ feedback message, based on receiving the second DL SPS transmission, without transmitting a CSI report associated with the second DL SPS transmission based on the triggering information not being associated with the second DL SPS transmission in the second PDSCH occasion.
4 . The method of claim 1 , wherein the first type of DM-RS corresponds to a first DM-RS sequence and the second type of DM-RS corresponds to a second DM-RS sequence different than the first DM-RS sequence.
5 . The method of claim 4 , wherein each of even-numbered elements in the first DM-RS sequence has an opposite sign relative to the respective even-numbered element in the second DM-RS sequence, wherein each of odd-numbered elements in the first DM-RS sequence has an opposite sign relative to the respective odd-numbered element in the second DM-RS sequence.
6 . The method of claim 4 , wherein the first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration different than the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS location, a DM-RS allocation in time or frequency resources, a DM-RS scrambling identifier (ID), or a number of DM-RS symbols.
7 . The method of claim 1 , wherein the first PDSCH occasion is associated with a downlink control information (DCI), and wherein receiving the triggering information comprises receiving the DCI, the DCI triggering the UE to transmit the first CSI report.
8 . The method of claim 1 , wherein the triggering information activates the UE to transmit the first CSI report without transmitting a second CSI report.
9 . The method of claim 1 , wherein the triggering information activates the UE to transmit a CSI report for each of X received PDSCH occasions including the first PDSCH occasion, where X≥1 and is configured via radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI).
10 . The method of claim 1 , wherein the first CSI report comprises one or more of: a channel quality information (CQI), a modulation and coding scheme (MCS), a block error ratio (BLER), a bit error rate (BER), a next best redundancy version (RV), a channel rank, or an average received power.
11 . A method of wireless communication performed by a base station, comprising:
transmitting, to a user equipment (UE), triggering information associated with one or more channel state information (CSI) reports associated with a downlink (DL) semi-persistent scheduling (SPS) transmission in one or more physical downlink shared channel (PDSCH) occasions comprising a first PDSCH occasion, wherein the first PDSCH occasion includes a first demodulation reference signal (DM-RS) of a first type of DM-RS, and wherein transmitting the triggering information comprises transmitting the first DM-RS;
transmitting a second DL SPS transmission in a second PDSCH occasion that is not associated with the triggering information, wherein the second PDSCH occasion includes a second DM-RS that is a second type of DM-RS different than the first type of DM-RS; and
receiving, from the UE based on the triggering information, a first CSI report in a physical uplink control channel (PUCCH), the first DM-RS triggering the UE to transmit the first CSI report.
12 . The method of claim 11 , further comprising receiving a first hybrid automatic repeat request (HARQ) feedback message comprising an acknowledgment (ACK) or an negative ACK (NACK).
13 . The method of claim 12 , further comprising:
receiving a second HARQ feedback message, based on the second DL SPS transmission, without the CSI report.
14 . The method of claim 11 , wherein each of even-numbered elements in the first DM-RS has an opposite sign relative to the respective even-numbered element in the second DM-RS, wherein each of odd-numbered elements in the first DM-RS has an opposite sign relative to the respective odd-numbered element in the second DM-RS.
15 . The method of claim 11 , wherein the first type of DM-RS corresponds to a first DM-RS pattern or a first DM-RS configuration and the second type of DM-RS corresponds to a second DM-RS pattern or a second DM-RS configuration different than the first DM-RS pattern or the first DM-RS configuration, respectively, wherein the first DM-RS configuration and the second DM-RS configuration correspond to at least one of a DM-RS location, a DM-RS allocation in time or frequency resources, a DM-RS scrambling identifier (ID), or a number of DM-RS symbols.
16 . The method of claim 11 , wherein the first PDSCH occasion is associated with a downlink control information (DCI), and wherein transmitting the triggering information comprises transmitting the DCI.
17 . The method of claim 11 , wherein the triggering information is associated with an instruction to transmit the first CSI report without transmitting a second CSI report.
18 . The method of claim 11 , wherein the triggering information is associated with an instruction to transmit a CSI report for each of X PDSCH occasions including the first PDSCH occasion, where X≥1 and is configured via radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI).
19 . The method of claim 11 , wherein the first CSI report comprises one or more of: a channel quality information (CQI), a modulation and coding scheme (MCS), a block error ratio (BLER), a bit error rate (BER), or a next best redundancy version (RV), a channel rank, or an average received power.
20 . An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory wherein the at least one processor is configured to:
receive triggering information associated with transmission of one or more channel state information (CSI) reports associated with one or more downlink (DL) semi-persistent scheduling (SPS) transmissions in one or more physical downlink shared channel (PDSCH) occasions;
receive a first DL SPS transmission of the one or more DL SPS transmissions in a first PDSCH occasion of the one or more PDSCH occasions, wherein the first PDSCH occasion includes a first demodulation reference signal (DM-RS) of a first type of DM-RS;
transmit, based on the triggering information, a first CSI report associated with the first DL SPS transmission, wherein, to receive the triggering information, the at least one processor is configured to receive the first DM-RS; and
receive a second DL SPS transmission in a second PDSCH occasion that is not associated with the triggering information, wherein the second PDSCH occasion includes a second DM-RS that is a second type of DM-RS different than the first type of DM-RS.
21 . The apparatus of claim 20 , further comprising a transceiver coupled to the at least one processor.
22 . The apparatus of claim 20 , wherein the triggering information is configured to activate the apparatus to transmit the first CSI report without causing the apparatus to transmit a second CSI report.
23 . The apparatus of claim 20 , wherein the triggering information is configured to activate the apparatus to transmit a CSI report for each of X received PDSCH occasions including the first PDSCH occasion, where X≥1 and is configured via radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or downlink control information (DCI).
24 . The apparatus of claim 20 , wherein the first CSI report comprises one or more of: a channel quality information (CQI), a modulation and coding scheme (MCS), a block error ratio (BLER), a bit error rate (BER), a next best redundancy version (RV), a channel rank, or an average received power.
25 . An apparatus for wireless communication, comprising:
a memory; and
at least one processor coupled to the memory wherein the at least one processor is configured to:
transmit, to a user equipment (UE), triggering information associated with a channel state information (CSI) report associated with a downlink (DL) semi-persistent scheduling (SPS) transmission in one or more physical downlink shared channel (PDSCH) occasions comprising a first PDSCH occasion, wherein the first PDSCH occasion includes a first demodulation reference signal (DM-RS) of a first type of DM-RS, and wherein, to transmit the triggering information, the at least one processor is configured to transmit the first DM-RS;
transmit a second DL SPS transmission in a second PDSCH occasion that is not associated with the triggering information, wherein the second PDSCH occasion includes a second DM-RS that is a second type of DM-RS different than the first type of DM-RS; and
receive, from the UE based on the triggering information, a first CSI report in a physical uplink control channel (PUCCH), wherein the first DM-RS is configured to trigger the UE to transmit the first CSI report.
26 . The apparatus of claim 25 , further comprising a transceiver coupled to the at least one processor.