Abstract: Aspects presented herein may enable a UE to limit MCS and/or K1 offset used for communicating with a base station to a threshold based at least in part on an SCS used for the communication. In one aspect, a UE limit at least one of an MCS to being less than or equal to an MCS threshold or a K1 offset to being greater than or equal to a K1 offset threshold based on a subcarrier spacing selected for communication with a base station, the K1 offset being a number of slots between receiving DL data and transmitting ACK/NACK feedback. The UE communicate with the base station based at least on one of the MCS being less than or equal to the MCS threshold or the K1 offset being greater than or equal to the K1 offset threshold.

Abstract: PDCCH/PDSCH multiplexing with rank adaptation is described. An apparatus is configured to receive a PDSCH transmission multiplexed with a PDCCH transmission that includes information to schedule the PDSCH. The PDCCH has a first rank, the PDSCH has a second rank, and both share a DMRS(s). The apparatus is configured to decode the PDSCH using a channel estimation for the PDSCH and the second rank of the PDSCH that is based on the shared DMRS indication. Another apparatus is configured to encode a PDSCH transmission multiplexed with a PDCCH transmission that includes information to schedule the PDSCH. The PDCCH has a first rank, the PDSCH has a second rank, and both share a DMRS(s). The apparatus is configured to provide, for a UE, the PDSCH transmission multiplexed with the PDCCH transmission that schedules the PDSCH and a shared DMRS indication indicative of the shared DMRS(s).

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may perform a decoding operation on a downlink message for the UE. The UE may store, in a buffer of the UE, decoding information associated with the decoding operation on the downlink message based at least in part on the decoding operation on the downlink message being at least partially unsuccessful. In some examples, the UE may transmit, to a network entity, a report indicating buffer usage information of the buffer of the UE, where the buffer usage information indicates one or more parameters associated with the decoding information stored in the buffer of the UE. In some cases, the buffer usage information may indicate one or more transport blocks for which entries are present in the buffer of the UE.

Abstract: PDCCH/PDSCH multiplexing with PDSCH data rate control is described. An apparatus is configured to receive, from a network node, DL signaling that indicates a MCS update, for a future time period, of a MCS associated with a PDSCH transmission that is multiplexed with a PDCCH transmission that includes information to schedule the PDSCH transmission. The apparatus is configured to demodulate data from the PDSCH transmission, after beginning the future time period, based on the MCS update. Another apparatus is configured to provide, for a UE, DL signaling that indicates a MCS update, for a future time period, of a MCS associated with a PDSCH transmission that is multiplexed with a PDCCH transmission that includes information to schedule the PDSCH transmission. The apparatus is configured to provide, for the UE, modulated data associated with the PDSCH transmission, after beginning the future time period, based on the MCS update.

Abstract: Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may measure a frequency selectivity of a channel between the UE and a base station and may transmit signaling to the base station indicating one or both of a frequency selectivity metric or a recommended demodulation reference signal (DMRS) port multiplexing pattern based on measuring the frequency selectivity. In some aspects, the UE may transmit the signaling to assist the base station in configuring a DMRS port multiplexing pattern based on current channel conditions. For example, if the frequency selectivity metric satisfies a threshold, the UE may recommend a DMRS port multiplexing pattern absent of code division multiplexing (CDM). Alternatively, if the frequency selectivity metric fails to satisfy the threshold, the UE may recommend a DMRS port multiplexing patter including CDM.

Abstract: A method for wireless communication at a wireless node includes obtaining downlink transmissions. The method also includes generating an original acknowledgement (ACK) codebook based on whether each of the downlink transmissions is successfully decoded. The method further includes modifying the original ACK codebook by transforming a number of bits of the original ACK codebook. The method still further includes generating an ACK payload comprising the modified original ACK codebook and information related to a quantity of one or more positive acknowledgements for the downlink transmissions. The method also includes outputting, for transmission, the ACK payload.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless device such as a user equipment (UE) may receive, from a scheduling device such as a base station, control signaling which indicates a semi-persistent scheduling (SPS) configuration scheduling a burst of multiple downlink shared channel transmission opportunities during an SPS interval. Based on receiving the SPS configuration, the UE may receive downlink signaling from the base station in a downlink shared channel transmission opportunity of the SPS interval. In some other aspects, a UE may receive control signaling which indicates a configured grant (CG) that schedules a burst of multiple uplink shared channel transmission opportunities during a CG timing interval. Based on receiving the CG, the UE may transmit uplink signaling to the base station in an uplink shared channel transmission opportunity indicated by the CG.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a grant that schedules multiple downlink communications, wherein the grant includes multiple start and length indicator values (SLIVs) that indicate respective time domain resource allocations (TDRAs) for the multiple downlink communications and a feedback timing indicator that indicates timing of uplink feedback communications for the multiple downlink communications. The UE may determine that there is a conflict between a timing of a first uplink feedback communication for a first downlink communication of the multiple downlink communications and a TDRA for a second downlink communication of the multiple downlink communications. The UE may adjust at least one of the TDRA for the second downlink communication or the timing of the first uplink feedback communication. Numerous other aspects are provided.

Abstract: Systems and techniques are provided for wireless communications. A process can include receiving a configured shared demodulation reference signal (DMRS) and determining, based on the configured shared DMRS, blind channel estimation information. The process can include receiving, based on the blind channel estimation information, control information indicative of a scheduled downlink data transmission. The process can include receiving, based on the blind channel estimation information, the scheduled downlink data transmission, wherein the scheduled downlink data transmission is received based on the control information and using the blind channel estimation information corresponding to the configured shared DMRS.

Abstract: Systems and techniques are provided for wireless communication. A process can include determining an updated bandwidth corresponding to a scheduled physical downlink shared channel (PDSCH) transmission, wherein the scheduled PDSCH transmission is associated with a physical downlink control channel (PDCCH) transmission. The PDSCH transmission and the PDCCH transmission can be associated with a shared configured DMRS. The process can include receiving, based on the shared configured DMRS, the scheduled PDSCH transmission using the updated bandwidth.

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a feedback configuration to a user equipment (UE) in control signaling, such as radio resource control (RRC) signaling, a medium access control (MAC) control element (MAC-CE), or a downlink control information (DCI) message. The feedback configuration may indicate a number of feedback bits to provide for each grant within a feedback occasion. The UE may receive scheduling information indicating one or more grants for the UE within the feedback occasion. The UE may transmit a feedback message based on receiving the grants, where the feedback message includes a set of bits for each grant within the feedback occasion. The number of bits in the set may be based on the feedback configuration.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information indicating a timing configuration for candidate positions of a discovery reference signal (DRS) window, wherein the DRS window is within an unlicensed millimeter wave (mmW) band, and wherein the timing configuration provides for repetition of a synchronization signal block (SSB) within the DRS window based at least in part on a wraparound scheme; and scan for the SSB in accordance with the timing configuration. Numerous other aspects are provided.

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, an indication associated with a quantity of active hybrid automatic repeat request (HARQ) processes, wherein the quantity of active HARQ processes is dynamically changeable based at least in part on an operating band and an associated subcarrier spacing. The UE may transmit, to the network entity, HARQ feedback based at least in part on the indication associated with the quantity of active HARQ processes. Numerous other aspects are described.

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a control message indicating a coding rate value corresponding to a downlink control information (DCI) format. The coding rate value may indicate a coding rate of the DCI format. The UE may receive, via a quantity of resource elements (REs) that is based on a payload size and the coding rate value, a DCI message of the DCI format that includes scheduling information associated with a data message, and the UE may receive the data message in accordance with the scheduling information. In some examples, the UE may receive the DCI message via a physical downlink control channel (PDCCH) multiplexed with a physical downlink shared channel (PDSCH) that carries the data message.

Abstract: Apparatus, methods, and computer-readable media for facilitating reference signal multiplexing with downlink data are disclosed herein. An example method for wireless communication at a user equipment (UE) includes receiving, from a base station, a reference signal configuration associated with at least one of a tracking reference signal (TRS) and a channel state information reference signal (CSI-RS), the reference signal configuration comprising a symbol level rate matching configuration, a precoder configuration, or a guard tone configuration. The example method also includes receiving, from the base station, a transmission comprising at least a reference signal and data based on the reference signal configuration.

Abstract: Aspects of the present disclosure can be implemented in a method for wireless communication by a first wireless node. The method generally includes receiving, from a second wireless node, information regarding PTRS tones, designating one or more of the PTRS tones as ZP tones and one or more of the PTRS tones as NZP tones based, at least in part, on the information, and transmitting a PTRS on the NZP tones. In some cases, the first wireless node is a user equipment (UE) and the second wireless node is a network entity. In some cases, the first wireless node is a network entity and the second wireless node is a UE.

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to skipping occasions, such as high frequency control packets, for overhead reduction. The control packets may be semi persistent scheduling (SPS) occasions, or configured grant (CG) physical uplink shared control channel (PUSCH). In a general aspect, for example, a user equipment (UE) may receive signaling activating SPS occasions and monitor for downlink control information (DCI) multiplexed in at least some of the SPS occasions. The DCI indicates at least one of the SPS occasions to be skipped from being monitored by the UE. The UE may transmit configured grant (CG) physical uplink shared channel (PUSCH) occasions to a network entity and transmit uplink control information (UCI) multiplexed in at least some of the CG PUSCH occasions. The UCI indicates at least one of the CG PUSCH occasions to be skipped from being monitored by the network entity.

Abstract: Methods, systems, and devices for wireless communications are described. Techniques described herein provide for independent scheduling by a first transmission and reception point (TRP) and a second TRP for a user equipment (UE) operable in a multiple TRP (mTRP) mode. A semi-static time division duplexing (TDD) pattern may indicate a set of downlink symbols, a set of uplink symbols and a set of flexible symbols. A portion of the flexible symbols may be dedicated for communications with the first TRP, and the second TRP may not use the portion of the flexible symbols dedicated for communications with the first TRP. The first UE may operate in the mTRP mode in the semi-static downlink symbols or uplink symbols and operate in a single TRP mode in the portion of the flexible symbols dedicated for communications with the first TRP.

Abstract: In an aspect, a PDCCH and a PDSCH are transmitted by a BS to a UE, whereby the PDCCH includes a first DCI part and the PDSCH includes a second DCI part (e.g., a 2-part DCI). In an example a first grant associated with the second DCI part is offset relative to a slot position of the second DCI part, whereas a second grant associated with the second DCI part is offset relative to the slot position to which the first grant is offset. In another aspect, two or more grants are grouped together, with the respective group being mapped to a PUCCH.

Abstract: Methods, systems, and devices for wireless communications are described. A wireless communications device, such as a user equipment (UE) may transmit a capability message indicating a capability of the UE to receive one or more downlink messages during a time slot, and may receive one or more control signalings which schedule a first and a second downlink message during the time slot, indicate a first resource allocation scheduled by a first scheduling configuration, and indicate a second resource allocation scheduled by a second scheduling configuration. The UE may monitor for one or both of the first downlink message or the second downlink message during the time slot based on the one or more control signalings and the capability message. The capability message may indicate a capability of the UE to receive a single downlink message or receive more than one downlink message during the time slot.