WO2021185089A1

WO2021185089A1 - Configuration and indication for enabling uplink transmission with multiple codewords

Info

Publication number: WO2021185089A1
Application number: PCT/CN2021/079009
Authority: WO
Inventors: Fang Yuan; Mostafa KHOSHNEVISAN; Wooseok Nam; Xiaoxia Zhang; Tao Luo
Original assignee: Qualcomm Incorporated
Priority date: 2020-03-19
Filing date: 2021-03-04
Publication date: 2021-09-23

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit, and a base station may receive, an indication that the UE has a capability to transmit multiple codewords in one uplink communication. The base station may transmit, and the UE may receive, downlink control information (DCI) indicating one or more parameters associated with a first codeword and a second codeword. The UE may transmit, and the base station may receive, a single uplink communication that includes the first codeword and the second codeword. The UE may transmit the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI. Numerous other aspects are described.

Description

CONFIGURATION AND INDICATION FOR ENABLING UPLINK TRANSMISSION WITH MULTIPLE CODEWORDS

CROSS-REFERENCE TO RELATED APPLICATIONS

This Patent Application claims priority to Patent Cooperation Treaty (PCT) Application No. PCT/CN2020/080192, filed on March 19, 2020, entitled “CONFIGURATION AND INDICATION FOR ENABLING UPLINK TRANSMISSION WITH MULTIPLE CODEWORDS, ” and to PCT Application No. PCT/CN2020/080315, filed on March 20, 2020, entitled “ASSOCIATION OF TRANSMISSION LAYERS AND CODEWORDS TO ENABLE UPLINK TRANSMISSION WITH MULTIPLE CODEWORDS, ” both of which are assigned to the assignee hereof. The disclosures of the prior Applications are considered part of and are incorporated by reference into this Patent Application.

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for providing a configuration and indication for enabling an uplink transmission with multiple codewords.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .

A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) . A UE may communicate with a BS via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. NR, which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

In some aspects, a method of wireless communication, performed by a user equipment (UE) , may include: transmitting, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; receiving, from the base station, downlink control information (DCI) indicating one or more parameters associated with a first codeword and a second codeword; and transmitting, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a method of wireless communication, performed by a base station, may include receiving, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; transmitting, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword; and receiving, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: transmit, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; receive, from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword; and transmit, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a base station for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; transmit, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword; and receive, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: transmit, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; receive, from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword; and transmit, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to: receive, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; transmit, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword; and receive, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, an apparatus for wireless communication may include: means for transmitting, to a base station, an indication that the apparatus has a capability to transmit multiple codewords in one uplink communication; means for receiving, from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword; and means for transmitting, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, an apparatus for wireless communication may include: means for receiving, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; means for transmitting, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword; and means for receiving, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

In some aspects, a method of wireless communication, performed by a UE, may include: determining an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and transmitting the uplink communication using the multiple codewords based at least in part on the association.

In some aspects, a method of wireless communication, performed by a base station, may include: determining transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels; and transmitting DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.

In some aspects, a UE for wireless communication may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to: determine an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and transmit the uplink communication using the multiple codewords based at least in part on the association.

In some aspects, a base station for wireless communication may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to: determine transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels; and transmit DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: determine an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and transmit the uplink communication using the multiple codewords based at least in part on the association.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a base station, may cause the one or more processors to: determine transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels; and transmit DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.

In some aspects, an apparatus for wireless communication may include: means for determining an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and means for transmitting the uplink communication using the multiple codewords based at least in part on the association.

In some aspects, an apparatus for wireless communication may include: means for determining transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels; and means for transmitting DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.

Fig. 2 is a diagram illustrating an example of a base station in communication with a UE in a wireless network, in accordance with the present disclosure.

Fig. 3 is a diagram illustrating an example of non-coherent joint transmission on an uplink, in accordance with the present disclosure.

Fig. 4 is a diagram illustrating an example of a demodulation reference signal indication, in accordance with the present disclosure.

Figs. 5A-5B are diagrams illustrating one or more examples of providing a configuration and indication for enabling an uplink transmission with multiple codewords, in accordance with the present disclosure.

Figs. 6-7 are diagrams illustrating one or more examples of association of transmission layers and codewords to enable uplink transmission with multiple codewords, in accordance with the present disclosure.

Figs. 8-9 are diagrams illustrating example processes associated with providing a configuration and indication for enabling an uplink transmission with multiple codeword, in accordance with the present disclosure.

Figs. 10-11 are diagrams illustrating example processes associated with association of transmission layers and codewords to enable uplink transmission with multiple codewords, in accordance with the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein, one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

It should be noted that while aspects may be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G) .

Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and/or an LTE network, among other examples. The wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , or the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) . A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in Fig. 1, a BS 110a may be a macro BS for a macro cell 102a, a BS 110b may be a pico BS for a pico cell 102b, and a BS 110c may be a femto BS for a femto cell 102c. A BS may support one or multiple (e.g., three) cells. The terms “eNB” , “base station” , “NR BS” , “gNB” , “TRP” , “AP” , “node B” , “5G NB” , and “cell” may be used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces, such as a direct physical connection or a virtual network, using any suitable transport network.

Wireless network 100 may also include relay stations. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) . A relay station may also be a UE that can relay transmissions for other UEs. In the example shown in Fig. 1, a relay BS 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

Wireless network 100 may be a heterogeneous network that includes BSs of different types, such as macro BSs, pico BSs, femto BSs, relay BSs, or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .

A network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs. Network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with one another, directly or indirectly, via a wireless or wireline backhaul.

UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, or the like. A UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and/or location tags, that may communicate with a base station, another device (e.g., remote device) , or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE) . UE 120 may be included inside a housing that houses components of UE 120, such as processor components and/or memory components. In some aspects, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, or the like. A frequency may also be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol or a vehicle-to-infrastructure (V2I) protocol) , and/or a mesh network. In this case, the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.

Devices of wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, channels, or the like. For example, devices of wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. Thus, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies less than 6 GHz, frequencies within FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz) . Similarly, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz) . It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.

As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.

Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.

At base station 110, a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) ) and control information (e.g., CQI requests, grants, and/or upper layer signaling) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

At UE 120, antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The term “controller/processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and/or a CQI) parameter, among other examples. In some aspects, one or more components of UE 120 may be included in a housing 284.

Network controller 130 may include communication unit 294, controller/processor 290, and memory 292. Network controller 130 may include, for example, one or more devices in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

Antennas (e.g., antennas 234a through 234t and/or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, antenna groups, sets of antenna elements, and/or antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include a set of coplanar antenna elements and/or a set of non-coplanar antenna elements. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include antenna elements within a single housing and/or antenna elements within multiple housings. An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of Fig. 2.

On the uplink, at UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM) , and transmitted to base station 110. In some aspects, a modulator and a demodulator (e.g., MOD/DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna (s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 5A-5B and Figs. 6-11.

At base station 110, the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240. Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244. Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications. In some aspects, a modulator and a demodulator (e.g., MOD/DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna (s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figs. 5A-5B and Figs. 6-11.

Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with providing a configuration and indication for enabling an uplink transmission with multiple codewords, as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 800 of Fig. 8, process 900 of Fig. 9, process 1000 of Fig. 10, process 1100 of Fig. 11, and/or other processes as described herein.

Memories

242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and/or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and/or program code) for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 800 of Fig. 8, process 900 of Fig. 9, process 1000 of Fig. 10, process 1100 of Fig. 11, and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.

In some aspects, UE 120 may include means for transmitting, to base station 110, an indication that UE 120 has a capability to transmit multiple codewords in one uplink communication, means for receiving, from base station 110, downlink control information (DCI) indicating one or more parameters associated with a first codeword and a second codeword, means for transmitting, to base station 110, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI, and/or the like. Additionally, or alternatively, the UE 120 may include means for determining an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels, means for transmitting the uplink communication using the multiple codewords based at least in part on the association, and/or the like. Additionally, or alternatively, the UE 120 may include means for performing one or more other operations described herein. In some aspects, such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.

In some aspects, base station 110 may include means for receiving, from UE 120, an indication that UE 120 has a capability to transmit multiple codewords in one uplink communication, means for transmitting, to UE 120, DCI indicating one or more parameters associated with a first codeword and a second codeword, means for receiving, from UE 120, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by UE 120 using different antenna panels based at least in part on the one or more parameters indicated in the DCI, and/or the like. Additionally, or alternatively, the base station 110 may include means for determining transmission parameters for multiple codewords of a UE 120 that are to be used for an uplink communication that uses multiple antenna panels, means for transmitting DCI that identifies the transmission parameters to enable the UE 120 to determine an association between sets of transmission layers and the multiple codewords, and/or the like. Additionally, or alternatively, the base station 110 may include means for performing one or more other operations described herein. In some aspects, such means may include one or more components of base station 110 described in connection with Fig. 2, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.

While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of controller/processor 280.

As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.

Fig. 3 is a diagram illustrating one or more examples 300 of non-coherent joint transmission (NCJT) on an uplink, in accordance with the present disclosure. In particular, reference number 310 shows NCJT of a first physical uplink shared channel (PUSCH) transmission 312 (shown as PUSCH 1) and a second PUSCH transmission 314 (shown as PUSCH 2) . When performing NCJT, sometimes referred to as spatial division multiplexing (SDM) , on an uplink, a UE may transmit the first PUSCH transmission 312 and the second PUSCH transmission 314 using the same time and frequency resource and using different spatial resources (e.g., separate antenna panels) , as scheduled by a single DCI.

For example, in some aspects, a UE may transmit the first PUSCH transmission 312 using a first antenna panel according to a first set of uplink transmission parameters (e.g., a first transmit precoder matrix indicator (TPMI) , a first sounding reference signal (SRS) resource indicator (SRI) , a first uplink transmission configuration indication (TCI) state, a first MCS, and/or the like) . Furthermore, the UE may transmit the second PUSCH transmission 314 using a second antenna panel according to a second set of uplink transmission parameters (e.g., a second TPMI, a second SRI, a second uplink TCI state, a second MCS, and/or the like) . In this way, the UE may form a first beam on the first antenna panel using a first precoding, and the UE may form a second beam on the second antenna panel using a second precoding. For example, for NCJT, a multi-layer precoder (P) may be represented by

where

represents a precoder for a first layer for a first antenna panel (A) , and

represents a precoder for a second layer for a second antenna panel (B) . Additionally, or alternatively, the UE may transmit an uplink communication based at least in part on a dynamic panel selection using a multi-layer precoder that may be represented by

or

Additionally, or alternatively, the UE may transmit an uplink communication using a single-panel, multi-layer precoder that may be represented by P = [v ₁v ₂…v _L] , where v _l represents a precoder for a layer l.

In some aspects, when the UE transmits the first PUSCH transmission 312 and the second PUSCH transmission 314 using the same time and frequency resource and using different spatial resources (e.g., different antenna panels) , the first PUSCH transmission 312 and the second PUSCH transmission 314 may correspond to a multi-panel uplink transmission that includes multiple codewords (or transport blocks) . For example, as shown by reference number 320, the first PUSCH transmission 312 may be associated with a first set of transmission layers (shown as Layer Set 1) , and the second PUSCH transmission 314 may be associated with a second set of transmission layers (shown as Layer Set 2) . Moreover, the first set of transmission layers (e.g., for a MIMO transmission) may be associated with a first codeword (shown as Codeword 1) corresponding to a first transport block, and the second set of transmission layers (e.g., for a MIMO transmission) may be associated with a second codeword (shown as Codeword 2) corresponding to a second transport block.

Accordingly, in a multi-panel uplink transmission that includes multiple codewords, a UE may encode each codeword independently and transmit the multiple codewords on an uplink through separate PUSCH transmissions using different antenna panels (e.g., PUSCH transmissions 312, 314 using two antenna panels in the case of a multi-panel uplink transmission that includes two codewords) . In general, the multiple codewords to be transmitted in the multi-panel uplink transmission may be scheduled using a single DCI communication (e.g., to reduce signaling overhead, UE and/or base station complexity, and/or the like) . However, wireless networks generally lack support for techniques to signal, configure, indicate, schedule, or otherwise enable multiple codewords in a single uplink transmission. Accordingly, some aspects described herein provide techniques and apparatuses to provide a high-level configuration to enable a UE to transmit multiple codewords in a single uplink transmission and to schedule or otherwise indicate parameters to be used to transmit the multiple codewords in a single uplink transmission. For example, as described in further detail herein with reference to Figs. 5A-5B, a UE may transmit a capability report to a base station indicating that the UE supports transmitting multiple codewords in one uplink transmission, and the base station may provide the UE with a high-level configuration to enable a multi-codeword uplink transmission (e.g., via radio resource control (RRC) signaling) . Accordingly, the base station may then transmit, to the UE, DCI indicating transmission parameters for multiple uplink codewords, which the UE may transmit in a single uplink communication based at least in part on the transmission parameters indicated in the DCI.

As indicated above, Fig. 3 is provided as one or more examples. Other examples may differ from what is described with respect to Fig. 3.

Fig. 4 is a diagram illustrating an example 400 of a DMRS indication, in accordance with various aspects of the present disclosure. As shown in Fig. 4, a UE may be configured with one or more mappings of DMRS ports (shown as Port index) to DMRS code-division multiplexing (CDM) groups (shown as CDM group) . For example, the UE may be configured with a mapping 405 for type 1 DMRS and/or a mapping 410 for type 2 DMRS. The UE may use the mapping 405 and/or the mapping 410 to identify a CDM group to which an indicated (e.g., by DCI) DMRS port belongs and/or to identify DMRS ports that belong to an indicated (e.g., by DCI) CDM group.

As described above, a UE may use multiple antenna panels for an uplink communication (e.g., for NCJT) . In some aspects, an antenna panel used for an uplink communication may be referred to as a PUSCH antenna port group (or an antenna port group) . In addition, as described above, a UE may use multiple codewords (e.g., two codewords) for an uplink communication that uses multiple antenna panels to thereby improve uplink throughput. For example, the UE may transmit a first codeword using multiple transmission layers for a first antenna panel, and a second codeword using multiple transmission layers for a second antenna panel.

In downlink communications that use multiple codewords, when more than four transmission layers (L) are to be used, the first

layers (e.g., according to layer index) may be associated with a first codeword and the remaining layers may be associated with a second codeword. However, a different mechanism for associating layers and codewords may be needed for uplink communications. Accordingly, it may be useful for the UE to determine a DMRS configuration for the multiple codewords used for an uplink communication. For example, it may be useful for the UE to determine an association between sets of transmission layers and codewords, an association between DMRS ports and codewords, a codeword-specific scrambling sequence, and/or the like. Some techniques and apparatuses described herein provide for DMRS configuration for multiple codewords used for an uplink communication. For example, as described in further detail herein with reference to Figs. 6-7, a base station may transmit, and a UE may receive, DCI that identifies transmission parameters to enable the UE to determine an association between sets of transmission layers and multiple codewords that are to be used for an uplink transmission that uses multiple antenna panels. Accordingly, the UE may determine the association between the sets of transmission layers and the multiple codewords and may transmit the uplink communication using the multiple codewords based at least in part on the association.

As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.

Figs. 5A-5B are diagrams illustrating one or more examples 500 of providing a configuration and indication for enabling an uplink transmission with multiple codewords, in accordance with the present disclosure. As shown in Figs. 5A-5B, example (s) 500 include a UE (e.g., UE 120) that communicates with a base station (e.g., base station 110) in a wireless network (e.g., wireless network 100) .

As shown in Fig. 5A, and by reference number 510, the UE may transmit, and the base station may receive, a capability report indicating that the UE supports transmitting multiple codewords in one uplink MIMO transmission (e.g., using different antenna panels, uplink transmission parameters, and/or the like) . For example, in some aspects, the capability report transmitted by the UE may include one or more parameters to indicate a maximum number of transport blocks (e.g., codewords) that the UE can transmit on a PUSCH for a codebook-based uplink MIMO transmission, a non-codebook-based uplink MIMO transmission, and/or the like. For example, in cases where the UE can transmit two codewords in a single uplink MIMO transmission, the capability report may indicate that the UE can transmit up to two codewords in a codebook-based uplink MIMO transmission (e.g., via a parameter maxTB-CB-PUSCH=2) , up to two codewords for a non-codebook-based uplink MIMO transmission (e.g., via a parameter maxTB-NCB-PUSCH=2) , and/or the like. Furthermore, in some aspects, the capability report may indicate the maximum number of codewords that the UE can transmit on a PUSCH for a codebook-based uplink MIMO transmission, a non-codebook-based uplink MIMO transmission, and/or the like per cell.

As further shown in Fig. 5A, and by reference number 520, the base station may transmit, and the UE may receive, RRC signaling including configuration information to be applied to one or more uplink transmissions that may include multiple codewords. For example, in some aspects, the base station may transmit the RRC signaling that includes the configuration information to be applied to the uplink transmission (s) with multiple codewords based at least in part on the capability report indicating that the UE supports transmitting multiple codewords in a single uplink MIMO transmission. For example, in some aspects, the RRC signaling may include a parameter (e.g., maxNrofULCodeWordsScheduledByDCI) to indicate a maximum number of uplink codewords that may be scheduled in a single uplink DCI communication (e.g., a DCI communication having a format associated with uplink scheduling, such as DCI format 0_1, DCI format 0_2, and/or the like) . In some aspects, the RRC signaling may indicate the maximum number of uplink codewords that may be scheduled in a single uplink DCI communication for one or more bandwidth parts. Accordingly, in some cases, the maximum number of uplink codewords that may be scheduled in a single uplink DCI communication may vary across different bandwidth parts. Furthermore, in some aspects, the configuration information included in the RRC signaling may indicate a transmission mode in which the UE is to perform an uplink MIMO transmission that includes multiple codewords. For example, in some aspects, the RRC signaling may indicate that the UE is to perform uplink MIMO transmissions in an NCJT or frequency division multiplexing (FDM) mode, a non-transparent joint transmission (JT) mode, a transparent JT mode, and/or the like. For FDM mode, the two PUSCHs of the two corresponding codewords may be transmitted using different frequency resources. For example, a first PUSCH for the first codeword may occupy the first half of allocated frequency resources indicated in the DCI using the first antenna panel, and a second PUSCH for the second codeword may occupy the second half of the allocated frequency resources in the DCI using the second antenna panel. For non-transparent JT mode, each PUSCH of two codewords are transmitted by two antenna panels.

As further shown in Fig. 5A, and by reference number 530, the base station may transmit, and the UE may receive, uplink DCI scheduling an uplink communication (e.g., a PUSCH) and indicating one or more parameters to be used for transmitting multiple codewords in the uplink communication. For example, in some aspects, the one or more parameters may include a new data indicator (NDI) , an MCS, a redundancy version (RV) , and/or the like per codeword. For example, in cases where the uplink DCI indicates parameters for an uplink communication including two codewords, the uplink DCI may include a first NDI, a first MCS, a first RV, and/or the like for a first codeword and a second NDI, a second MCS, a second RV, and/or the like for a second codeword. Furthermore, in some aspects, the base station may set one or more parameters in the uplink DCI to one or more predefined values to dynamically disable uplink transmission of one or more uplink codewords. For example, in cases where the uplink DCI schedules up to two (2) codewords, one of the codewords may be disabled if an MCS field is set to a first predefined value and an RV field is set to a second predefined value (e.g., an MCS/RV pair in which the MCS is set to 26 and the RV is set to 1) . In this case, the enabled codeword may be mapped to a first codeword (e.g., a codeword having index 0) and the second codeword (e.g., a codeword having index 1) may be disabled.

In some aspects, the one or more parameters included in the uplink DCI may include a bandwidth part indicator to indicate a bandwidth part in which the UE is to transmit the uplink communication. For example, a UE may be configured with up to four (4) uplink bandwidth parts in a cell, only one of which is active at a given time, and the bandwidth part indicator in the DCI can be used to dynamically switch between different uplink bandwidth parts. Accordingly, in some cases, the bandwidth part indicated in the uplink DCI may be associated with an RRC configuration in which the maximum number of uplink codewords scheduled by the uplink DCI is limited to one (1) . In such cases, to maintain a DCI alignment (e.g., a uniform bit length for different bandwidth parts) , fields in the uplink DCI that indicate the NDI, MCS, RV, and/or the like for additional codewords (e.g., a second codeword) may be padded with zeros. For example, in cases where a bandwidth part indicator field in the uplink DCI indicates a bandwidth part other than an active bandwidth part, and the indicated bandwidth part is associated with an RRC configuration enabling the uplink DCI to schedule two or more codewords, fields in the uplink DCI that indicate the NDI, MCS, RV, and/or the like for one or more additional codewords may be padded with zeroes when the active bandwidth part is associated with an RRC configuration limiting the maximum number of uplink codewords scheduled by the uplink DCI to one (1) .

In some aspects, in cases where the RRC signaling indicates that the UE is to perform uplink MIMO transmissions in the NCJT mode, the non-transparent JT mode, and/or the like (e.g., a mode in which different codewords are transmitted using different precoder information) , the one or more parameters in the uplink DCI may include a DMRS port indication that identifies multiple DMRS CDM groups for the respective codewords. For example, in cases where the uplink DCI schedules two codewords, the DMRS port indication may indicate at least two DMRS CDM groups for two codewords to be transmitted in the NCJT mode, the non-transparent JT mode, and/or the like. In particular, the NCJT mode, the non-transparent JT mode, and/or the like may correspond to SDM configurations in which each codeword is transmitted using a different antenna panel. For example, each codeword is associated with a layer set that includes multiple layers, which are mapped to one or more DMRS ports in a DMRS CDM group (e.g., for two codewords, there are two corresponding PUSCH transmissions and two corresponding DMRS CDM groups) . Accordingly, in cases where an SDM-based transmission mode is configured, a quantity of DMRS CDM groups indicated in the DMRS port indication may be equal to or greater than the quantity of uplink codewords to be transmitted.

In some aspects, the one or more parameters in the uplink DCI may include a code block group transmission indicator (CBGTI) , which typically includes zero, two, four, six, or eight bits to indicate one or more code block groups (CBGs) to be retransmitted (e.g., where the uplink DCI includes hybrid automatic repeat request (HARQ) -related information to schedule an uplink retransmission) . Accordingly, in cases where the uplink DCI includes a CBGTI to indicate one or more CBGs to be retransmitted, the CBGTI may be scaled according to the RRC-configured parameter indicating the maximum number of uplink codewords that may be scheduled by the uplink DCI. For example, in cases where the uplink DCI may schedule up to two codewords, half the bits in the CBGTI may be mapped to a first codeword and half the bits in the CBGTI may be mapped to a second codeword.

In some aspects, the uplink DCI may include one or more fields that indicate precoding information to be applied for the multiple codewords, which the UE may interpret according to the RRC-configured transmission mode. For example, when the RRC-configured transmission mode is the NCJT or FDM mode, the uplink DCI may include an uplink TCI that identifies two uplink TCI states that correspond to a first uplink TCI state for a first codeword and a second uplink TCI state for a second codeword, or the uplink DCI may include a precoder indication that indicates two SRIs (e.g., for non-codebook-based transmission) or TPMIs (e.g., for codebook-based transmission) to indicate a first precoder and rank information for a first codeword and a second precoder and rank information for a second codeword. For example, as shown by reference number 532, the NCJT or FDM mode may be associated with a multi-layer precoder, P, which may be configured according to the expression

where

represents a first precoder to be used for a first codeword associated with a first uplink TCI state, and

represents a second precoder to be used for a second codeword associated with a second uplink TCI state.

Alternatively, when the RRC-configured transmission mode is the non-transparent JT mode, the uplink DCI may similarly include an uplink TCI that identifies two uplink TCI states or a precoder indication that indicates two SRIs or two TPMIs. However, in the non-transparent JT mode, the two uplink TCI states in the case of an uplink TCI or the two SRIs or the two TMPIs in the case of a precoder indication may be applied to both the first uplink codeword and the second uplink codeword. For example, as shown by reference number 534, the non-transparent JT mode may be associated with a multi-layer precoder, P, which may be configured according to the expression

where

represents a first precoder to be used for a first codeword associated with a first uplink TCI state and

represents a second uplink TCI state or a second precoder to be used for a second codeword associated with a second uplink TCI state.

Alternatively, when the RRC-configured transmission mode is the transparent JT mode, the uplink DCI may include an uplink TCI that identifies one uplink TCI state for both codewords or a precoder indication that indicates one SRI or TPMI for both codewords. For example, as shown by reference number 536, the transparent JT mode may be associated with a multi-layer precoder, P, which may be configured according to the expression P= [v ₁v ₂] , where v ₁v ₂ represents the precoder to be used for a first codeword and a second codeword, using an uplink TCI state.

As shown in Fig. 5B, and by reference number 540, the UE may transmit a single uplink communication including multiple codewords. For example, as described above, each codeword may be transmitted in a separate PUSCH using a different antenna panel based at least in part on the one or more parameters indicated in the uplink DCI. Furthermore, in some cases, the single uplink communication may include uplink control information (UCI) carried on a physical uplink control channel (PUCCH) , which may be multiplexed or otherwise mapped to the PUSCH of the layers of one or more of the multiple codewords. For example, in a carrier aggregation scenario, the UE may be configured with multiple cells, including a first cell used to transmit the UCI carried on the PUCCH and a second cell used to transmit the PUSCH including multiple codewords. In this case, based at least in part on an overlap between the PUCCH and the PUSCH, the UCI may be multiplexed or otherwise mapped to the PUSCH layers in the second cell.

For example, in some aspects, the UCI may be mapped to the PUSCH including the layers associated with multiple codewords. In some aspects, the UCI may be mapped to the PUSCH including the layers associated with multiple codewords in cases where the UCI includes a quantity of bits that fails to satisfy a threshold value and/or the UCI has a particular type (e.g., HARQ acknowledgement (HARQ-ACK) information) . Alternatively, the UCI may be mapped to the PUSCH including the layers associated with one particular codeword. In some aspects, the UCI may be mapped to the PUSCH including the layers associated with one particular codeword in cases where the UCI includes a quantity of bits that satisfies the threshold value and/or the UCI has another particular type (e.g., channel state information (CSI) ) . In the latter case, the particular codeword to be mapped to the UCI may be determined based at least in part on one or more metrics associated with the multiple codewords transmitted in the single uplink communication. For example, in some aspects, the UCI may be mapped to the codeword that has a highest MCS, a lowest MCS, a largest transport block size (TBS) , a smallest TBS, and/or the like. Additionally, or alternatively, in cases where the one or more metrics are equal for the multiple codewords (e.g., the two codewords have the same MCS, the same TBS, and/or the like) , the UCI may be mapped to a default codeword (e.g., a codeword having a lowest index, such as CW1) .

In some aspects, when the UCI is mapped to the layers associated with multiple codewords, the UCI may be multiplexed onto the PUSCH via puncturing or rate-matching. Alternatively, when the UCI is mapped to the layers associated with one codeword, the UCI may be multiplexed onto the PUSCH via rate-matching. For example, reference number 542 illustrates an example of UCI puncturing two codewords, which may be applied when the UCI is mapped to the layers associated with multiple codewords. In the case of UCI puncturing multiple codewords, each codeword may be mapped to a continuous set of resource elements (REs) for data transmission and some of the REs allocated to the data transmission may be punctured to carry the UCI. Alternatively, reference number 544 illustrates an example of UCI rate-matched on one codeword, which may be applied when the UCI is mapped to the layers associated with multiple codewords or the layers associated with one particular codeword.

In the case of rate-matching the UCI, the codewords may be mapped to a discontinuous set of REs for data transmission, with a remaining set of REs used to carry the UCI. In the latter case, when the UCI is multiplexed onto the PUSCH via rate-matching, the UE may determine a rate-matching output according to a sequence length for the UCI, E _UCI, i, which may be determined according to the expression E _UCI, i = L _qQ′ _UCI, iQ _m when the UCI is mapped to the layers of one codeword, the expression E _UCI, i=L _q1Q′ _UCI, iQ _m1+L _q2Q′ _UCI, iQ _m2 when the UCI is mapped to the layers of two codewords, and/or the like, where L _q represents the layers of a codeword, Q′ _UCI, i represents the REs for the UCI, which may be determined using techniques described in more detail below, and Q _m represents the modulation order of a codeword.

In some aspects, when the UCI is mapped to the layers of multiple codewords, the number of coded modulation symbols per layer for UCI transmission, Q′ _UCI, i, may be determined according to the following expression for a UCI type i transmission on a PUSCH with an uplink shared channel (UL-SCH) :

where q = 0, 1 for two codewords (CW1 or CW2) ,

is a PUSCH offset indicated in the uplink DCI, UCI _i is a quantity of coded bits of UCI type i, where i=0 when the UCI type is HARQ-ACK, i=1 when the UCI type is CSI part 1, or i=2 when the UCI type is CSI part 2. Furthermore, in the above expression, C _UL-SCH represents a quantity of code blocks for the UL-SCH of the PUSCH transmission, K _r, q=0 if the DCI format scheduling the q-th codeword of the PUSCH transmission includes a CBGTI field indicating that the UE is to not transmit the r-th code block or otherwise corresponds to the r-th code block size for the UL-SCH of the PUSCH transmission,

is the scheduled bandwidth of the PUSCH transmission, expressed as a quantity of subcarriers,

is a quantity of REs that can be used to transmit the UCI in OFDM symbol l, and α is configured by higher layer parameter scaling.

Alternatively, when the UCI is mapped to the layers of one codeword in the manner described above, the number of coded modulation symbols per layer for UCI transmission, Q′ _UCI, i, may be determined according to the following expression:

where q is the codeword to be multiplexed with the UCI and the remaining parameters are the same or similar to the parameters that are used when the UCI is mapped to the layers of multiple codewords.

As indicated above, Figs. 5A-5B are provided as one or more examples. Other examples may differ from what is described with respect to Figs. 5A-5B.

Fig. 6 is a diagram illustrating an example 600 of association of transmission layers and codewords to enable uplink transmission with multiple codewords, in accordance with the present disclosure. As shown in Fig. 6, example 600 includes a UE (e.g., UE 120) that communicates with a base station (e.g., base station 110) in a wireless network (e.g., wireless network 100) . In some aspects, the UE may employ multiple transmit antenna panels (e.g., multiple PUSCH antenna port groups) . For example, the UE may use a first antenna panel to transmit a first codeword in multiple transmission layers, and a second antenna panel to transmit a second codeword in multiple transmission layers. In some aspects, the first codeword may be associated with a first index value (e.g., codeword 0) and the second codeword may be associated with a second index value (e.g., codeword 1) .

As shown by reference number 605, the base station may transmit, and the UE may receive, DCI that schedules an uplink communication of the UE. For example, the DCI may schedule a multi-panel uplink communication of the UE, such as a first PUSCH transmission (e.g., of multiple layers) on a first antenna panel of the UE and a second PUSCH transmission (e.g., of multiple layers) on a second antenna panel of the UE. The DCI may enable the UE to determine an association between sets of transmission layers and the multiple codewords, as described below. In some aspects, the UE may receive the DCI from a first TRP (e.g., associated with the base station) , and the DCI may schedule an uplink multi-panel communication to the first TRP and a second TRP (e.g., associated with the base station or another BS) .

In some aspects, the DCI may identify transmission parameters for the uplink communication of the UE. For example, the base station may determine transmission parameters for multiple codewords (e.g., two codewords) of the UE, and the DCI may identify the transmission parameters that are determined. Accordingly, the transmission parameters indicated by the DCI may include a first set of transmission parameters for a first PUSCH transmission of the UE, and a second set of transmission parameters for a second PUSCH transmission of the UE.

The transmission parameters may include one or more precoding indicators, such as one or more TPMIs (e.g., for codebook-based uplink) or one or more SRIs (e.g., for non-codebook-based uplink) . For example, the transmission parameters may include a first precoding indicator for the first PUSCH transmission and a second precoding indicator for the second PUSCH transmission. A precoding indicator may identify multiple transmission layers that are to be transmitted using an antenna panel (e.g., a precoding indicator may identify a precoder matrix) .

The transmission parameters may include one or more uplink beam identifiers, such as one or more TCIs. For example, the transmission parameters may include a first beam identifier for the first PUSCH transmission and a second beam identifier for the second PUSCH transmission. A TCI may indicate a TCI state associated with a beam, and the TCI state may be associated with a reference signal, such as an SRS resource, an SRS resource set, a channel state information reference signal (CSI-RS) , or a synchronization signal block (SSB) index. Accordingly, the UE may transmit a PUSCH transmission using a beam or a spatial filter that corresponds to a beam or a spatial filter used for a reference signal associated with a TCI state indicated for the PUSCH transmission.

The transmission parameters may include one or more DMRS identifiers. For example, the transmission parameters may include a single DMRS identifier that identifies DMRS ports for the first PUSCH transmission and the second PUSCH transmission. Accordingly, the DMRS identifier may identify DMRS ports associated with multiple (e.g., at least two) CDM groups (e.g., according to mapping 405 or mapping 410, as described above) .

In some aspects, a DMRS identifier may be an index value of a mapping of DMRS ports. For example, the UE may be configured with one or more mappings of DMRS ports that are to be used when multiple (e.g., two) codewords are to be transmitted by the UE for the multi-panel uplink communication. In some aspects, the UE may be configured with one or more of

mapping

705, 710, 715, 720, 725, or 730 of Fig. 7, as described below.

As shown by reference number 610, the UE may determine a DMRS configuration for multiple codewords (e.g., two codewords) . For example, the UE may determine a first DMRS configuration for a first codeword that is to be transmitted using a first antenna panel, and a second DMRS configuration for a second codeword that is to be transmitted using a second antenna panel. The DMRS configuration for the multiple codewords may be based at least in part on the transmission parameters identified by the DCI.

In some aspects, the UE may determine an association between sets of transmission layers and the multiple codewords (e.g., determine a split of transmission layers scheduled for the multi-panel uplink communication among multiple codewords) . For example, the UE may determine that a first set of layers (e.g., one or more layers) is associated with the first codeword and a second set of layers (e.g., one or more layers) is associated with the second codeword. In some aspects, the UE may determine the association between the sets of layers and the multiple codewords based at least in part on CDM groups indicated for the multiple codewords (e.g., indicated by a DMRS identifier, as described above) .

As described above, the DCI may identify respective precoding indicators (e.g., respective SRIs or TPMIs) for the multiple PUSCH transmissions. A precoding indicator may indicate a set of layers that is to be used to transmit a PUSCH transmission. For example, a first precoding indicator (e.g., a first SRI or TPMI) may indicate a first set of layers for the first PUSCH transmission and a second precoding indicator (e.g., a second SRI or TPMI) may indicate a second set of layers for the second PUSCH transmission. Accordingly, the UE may determine that the first codeword is to be transmitted using the first set of layers, and the second codeword is to be transmitted using the second set of layers.

Moreover, the UE may determine that one or more first DMRS ports identified by a DMRS identifier are associated with a first CDM group (e.g., using mapping 405 or mapping 410, as described above) , one or more second DMRS ports identified by the DMRS identifier are associated with a second CDM group (e.g., using mapping 405 or mapping 410) , and so forth. Accordingly, the UE may determine that the one or more first DMRS ports in the first CDM group are mapped to the first set of layers (for transmitting the first codeword) , and the one or more second DMRS ports in the second CDM group are mapped to the second set of layers (for transmitting the second codeword) . Thus, the UE may transmit the first codeword using DMRS port (s) of the first CDM group, and the second codeword using DMRS port (s) of the second CDM group.

The first DMRS ports in the first CDM group may be quasi-co-located (QCLed) with a first TCI state indicated by the DCI, and the second DMRS ports in the second CDM group may be QCLed with a second TCI state indicated by the DCI. Accordingly, the first codeword may be transmitted using a first beam, and the second codeword may be transmitted using a second beam.

In one or more examples, the first set of layers includes one layer (Layer 0) and the second set of layers includes one layer (Layer 1) (e.g., the multi-panel uplink communication has a rank of 2) , and the DMRS identifier of the DCI identifies a single DMRS port associated with a first CDM group (e.g., port 0) and a single DMRS port associated with a second CDM group (e.g., port 2) . Accordingly, the UE may determine that the first set of layers (Layer 0) is to be used for the first codeword and the second set of layers (Layer 1) is to be used for the second codeword. Moreover, the UE may determine that the first CDM group (port 0) is mapped to the first set of layers (Layer 0) and the second CDM group (port 2) is mapped to the second set of layers (Layer 1) .

In one or more examples, the first set of layers includes two layers (Layers 0 and 1) and the second set of layers includes one layer (Layer 2) (e.g., the multi-panel uplink communication has a rank of 3) , and the DMRS identifier of the DCI identifies two DMRS port associated with a first CDM group (e.g., ports 0 and 1) and a single DMRS port associated with a second CDM group (e.g., port 2) . Accordingly, the UE may determine that the first set of layers (Layers 0 and 1) is to be used for the first codeword and the second set of layers (Layer 2) is to be used for the second codeword. Moreover, the UE may determine that the first CDM group (ports 0 and 1) is mapped to the first set of layers (Layers 0 and 1) (e.g., in order) and the second CDM group (port 2) is mapped to the second set of layers (Layer 2) .

In one or more examples, the first set of layers includes one layer (Layer 0) and the second set of layers includes two layers (Layers 1 and 2) (e.g., the multi-panel uplink communication has a rank of 3) , and the DMRS identifier of the DCI identifies a single DMRS port associated with a first CDM group (e.g., port 0) and two DMRS port associated with a second CDM group (e.g., ports 2 and 3) . Accordingly, the UE may determine that the first set of layers (Layer 0) is to be used for the first codeword and the second set of layers (Layers 1 and 2) is to be used for the second codeword. Moreover, the UE may determine that the first CDM group (port 0) is mapped to the first set of layers (Layer 0) and the second CDM group (ports 2 and 3) is mapped to the second set of layers (Layers 1 and 2) (e.g., in order) .

In one or more examples, the first set of layers includes one layer (Layer 0) and the second set of layers includes two layers (Layers 1 and 2) (e.g., the multi-panel uplink communication has a rank of 3) , and the DMRS identifier of the DCI identifies a single DMRS port associated with a first CDM group (e.g., port 3) and two DMRS port associated with a second CDM group (e.g., ports 4 and 5) . Accordingly, the UE may determine that the first set of layers (Layer 0) is to be used for the first codeword and the second set of layers (Layers 1 and 2) is to be used for the second codeword. Moreover, the UE may determine that the first CDM group (port 3) is mapped to the first set of layers (Layer 0) and the second CDM group (ports 4 and 5) is mapped to the second set of layers (Layers 1 and 2) (e.g., in order) .

In one or more examples, the first set of layers includes two layers (Layers 0 and 1) and the second set of layers includes two layers (Layers 2 and 3) (e.g., the multi-panel uplink communication has a rank of 4) , and the DMRS identifier of the DCI identifies two DMRS ports associated with a first CDM group (e.g., ports 0 and 1) and two DMRS port associated with a second CDM group (e.g., ports 2 and 3) . Accordingly, the UE may determine that the first set of layers (Layers 0 and 1) is to be used for the first codeword and the second set of layers (Layers 2 and 3) is to be used for the second codeword. Moreover, the UE may determine that the first CDM group (ports 0 and 1) is mapped to the first set of layers (Layers 0 and 1) (e.g., in order) and the second CDM group (ports 2 and 3) is mapped to the second set of layers (Layers 2 and 3) (e.g., in order) .

In some aspects, other rank 4 configurations of the first set of layers and the second set of layers may be used. For example, the first set of layers may include one layer and the second set of layers may include three layers. As another example, the first set of layers may include three layers and the second set of layers may include one layer. In these examples, the DMRS identifier of the DCI may identify three DMRS ports associated with a first CDM group and one DMRS port associated with a second CDM group, and the CDM groups may be mapped to the layers as described above.

As shown by reference number 615, the UE may communicate with the base station using multiple antenna panels based at least in part on the determined DMRS configuration. For example, the UE may transmit the multi-panel uplink communication based at least in part on the determined DMRS configuration. As an example, the UE may transmit a first PUSCH transmission (e.g., transmit the first codeword in one or more transmission layers associated with the first codeword) using a first antenna port group, and transmit a second PUSCH transmission (e.g., transmit the second codeword in one or more transmission layers associated with the second codeword) using a second antenna port group. In some aspects, the UE may transmit the first PUSCH transmission to a first TRP (e.g., associated with the base station) and the second PUSCH transmission to a second TRP (e.g., associated with the base station or another base station) .

In some aspects, the UE may transmit the multiple codewords using respective scrambling sequences. For example, the UE may transmit the first codeword in the first PUSCH transmission using a first scrambling sequence, and the second codeword in the second PUSCH transmission using a second scrambling sequence. In some aspects, the UE may determine respective scrambling sequences for the multiple codewords using a scrambling sequence generator. In some aspects, the UE may initialize the scrambling sequence generator for a codeword using the following equation:

c _init = n _RNTI·2 ¹⁵+q·2 ¹⁴+n _ID

where c _init represents an initial value for the scrambling sequence generator, n _RNTI represents a value of a radio network temporary identifier (RNTI) associated with the UE (e.g., a value of a cell RNTI (C-RNTI) , a modulation and coding scheme cell RNTI (MCS-C-RNTI) , a configured scheduling RNTI (CS-RNTI) , and/or the like) , q represents an index value associated with the codeword (e.g., q = 0 for the first codeword, q = 1 for the second codeword, and so forth) , and n _ID represents a value for a higher-layer data scrambling identity PUSCH parameter (e.g., dataScramblingIdentityPUSCH) , when the parameter is configured and/or the PUSCH transmission is not scheduled using DCI format 0_0 in a common search space, or a value of a cell identifier

when the parameter is not configured and/or the PUSCH transmission is scheduled using DCI format 0_0 in a common search space.

As indicated above, Fig. 6 is provided as an example. Other examples may differ from what is described with respect to Fig. 6.

Fig. 7 is a diagram illustrating an example 700 of association of transmission layers and codewords to enable uplink transmission with multiple codewords, in accordance with the present disclosure. In particular, Fig. 7 shows that the UE may be configured with one or

more mappings

705, 710, 715, 720, 725, or 730. In some aspects, the UE may use mapping 705 for type 1 DMRS, or mapping 710 for type 2 DMRS, when the multi-panel uplink communication has a rank of 2. In some aspects, the UE may use mapping 715 for type 1 DMRS, or mapping 720 for type 2 DMRS, when the multi-panel uplink communication has a rank of 3. In some aspects, the UE may use mapping 725 for type 1 DMRS, or mapping 730 for type 2 DMRS, when the multi-panel uplink communication has a rank of 4.

As described above, the mappings may map index values (shown as Value) to DMRS ports (shown as DMRS port (s) ) . For example, the transmission parameters of the DCI may indicate a DMRS identifier of 2 (e.g., for type 2 DMRS and a transmission rank of 3) , and the UE may identify that

DMRS ports

0, 2, and 3 are to be used based at least in part on the DMRS identifier (e.g., using mapping 720) . Moreover, in this example, the UE may determine that DMRS port 0 is associated with CDM group 0, and

DMRS ports

2 and 3 are associated with CDM group 1 according to mapping 410, as described above.

As indicated above, Fig. 7 is provided as an example. Other examples may differ from what is described with respect to Fig. 7.

Fig. 8 is a diagram illustrating an example process 800 performed, for example, by a UE, in accordance with the present disclosure. Example process 800 is an example where the UE (e.g., UE 120 and/or the like) performs operations associated with providing a configuration and indication for enabling an uplink transmission with multiple codewords.

As shown in Fig. 8, in some aspects, process 800 may include transmitting, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication (block 810) . For example, the UE may transmit (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, memory 282, and/or the like) , to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication, as described above.

As further shown in Fig. 8, in some aspects, process 800 may include receiving, from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword (block 820) . For example, the UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like) , from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword, as described above.

As further shown in Fig. 8, in some aspects, process 800 may include transmitting, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI (block 830) . For example, the UE may transmit (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, memory 282, and/or the like) , to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI, as described above.

Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, process 800 includes receiving, from the base station, RRC signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.

In a second aspect, alone or in combination with the first aspect, the DCI includes a set of fields padded with zeros for the second codeword when the RRC signaling indicates that the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part is one.

In a third aspect, alone or in combination with one or more of the first and second aspects, the one or more parameters include CBGTI that is scaled according to the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the one or more parameters indicated in the DCI include one or more of an NDI, an MCS, or an RV for each of the first codeword and the second codeword.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, transmitting the single uplink communication includes refraining from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the one or more fields include an MCS field having a first predefined value and an RV field having a second predefined value.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the one or more parameters include a DMRS antenna port indication including two or DMRS CDM groups to be used to transmit the first codeword and the second codeword using the different antenna panels.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the one or more parameters indicated in the DCI indicate a multi-layer precoder to be used to transmit the single uplink communication based at least in part on a configured mode for the single uplink communication.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the multi-layer precoder is indicated by separate uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is an NCJT mode.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the multi-layer precoder is indicated by multiple uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is a non-transparent JT mode.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the multi-layer precoder is indicated by a single uplink TCI state, SRI, or TPMI for the first codeword and the second codeword when the configured mode is a transparent JT mode.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, transmitting the single uplink communication includes multiplexing UCI carried on a PUCCH onto a PUSCH used to carry the first codeword and the second codeword.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the UCI is multiplexed onto the PUSCH by puncturing or rate-matching REs allocated to one or more of the first codeword or the second codeword.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the UCI is multiplexed onto layers associated with the first codeword and the second codeword based at least in part on the UCI including a number of bits that fails to satisfy a threshold or based at least in part on a type of the UCI.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, the UCI is multiplexed onto layers associated with either the first codeword or the second codeword based at least in part on the UCI including a number of bits that satisfies a threshold or based at least in part on a type of the UCI.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, multiplexing the UCI carried on the PUCCH onto the PUSCH includes determining whether to multiplex the UCI onto the layers associated with the first codeword or the second codeword based at least in part on one or more metrics associated with the first codeword and the second codeword.

In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the UCI is multiplexed onto the layers associated with a default codeword when the one or more metrics are equal for the first codeword and the second codeword.

Although Fig. 8 shows example blocks of process 800, in some aspects, process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 may be performed in parallel.

Fig. 9 is a diagram illustrating an example process 900 performed, for example, by a base station, in accordance with the present disclosure. Example process 900 is an example where the base station (e.g., base station 110 and/or the like) performs operations associated with providing a configuration and indication for enabling an uplink transmission with multiple codewords.

As shown in Fig. 9, in some aspects, process 900 may include receiving, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication (block 910) . For example, the base station may receive (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, and/or the like) , from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication, as described above.

As further shown in Fig. 9, in some aspects, process 900 may include transmitting, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword (block 920) . For example, the base station may transmit (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, memory 242, and/or the like) , to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword, as described above.

As further shown in Fig. 9, in some aspects, process 900 may include receiving, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI (block 930) . For example, the base station may receive (e.g., using antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, and/or the like) , from the UE, a single uplink communication that includes the first codeword and the second codeword, as described above. In some aspects, the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, process 900 includes transmitting, to the UE, RRC signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the DCI causes the UE to refrain from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the single uplink communication includes UCI carried on a PUCCH multiplexed onto a PUSCH used to carry the first codeword and the second codeword.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the UCI is multiplexed onto the layers associated with the first codeword or the second codeword based at least in part on one or more metrics associated with the first codeword and the second codeword.

Although Fig. 9 shows example blocks of process 900, in some aspects, process 900 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 9. Additionally, or alternatively, two or more of the blocks of process 900 may be performed in parallel.

Fig. 10 is a diagram illustrating an example process 1000 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1000 is an example where the UE (e.g., UE 120, and/or the like) performs operations relating to association of transmission layers and codewords to enable uplink transmission with multiple codewords.

As shown in Fig. 10, in some aspects, process 1000 may include determining an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels (block 1010) . For example, the UE (e.g., using controller/processor 280, and/or the like) may determine an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels, as described above.

As further shown in Fig. 10, in some aspects, process 1000 may include transmitting the uplink communication using the multiple codewords based at least in part on the association (block 1020) . For example, the UE (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) may transmit the uplink communication using the multiple codewords based at least in part on the association, as described above.

Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, process 1000 includes receiving DCI that identifies multiple SRIs or multiple TPMIs for the uplink communication, and the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.

In a second aspect, alone or in combination with the first aspect, process 1000 includes receiving DCI that identifies multiple DMRS ports in multiple CDM groups for the uplink communication.

In a third aspect, alone or in combination with one or more of the first and second aspects, one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used to transmit a second codeword.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the one or more first DMRS ports are quasi-co-located with a first TCI state indicated by the DCI, and the one or more second DMRS ports are quasi-co-located with a second TCI state indicated by the DCI.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, a first codeword is to be transmitted using a first scrambling sequence and a second codeword is to be transmitted using a second scrambling sequence.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, a scrambling sequence for a codeword is based at least in part on an index value associated with the codeword.

Although Fig. 10 shows example blocks of process 1000, in some aspects, process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

Fig. 11 is a diagram illustrating an example process 1100 performed, for example, by a base station, in accordance with various aspects of the present disclosure. Example process 1100 is an example where the base station (e.g., base station 110, and/or the like) performs operations relating to association of transmission layers and codewords to enable uplink transmission with multiple codewords.

As shown in Fig. 11, in some aspects, process 1100 may include determining transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels (block 1110) . For example, the base station (e.g., using controller/processor 240, and/or the like) may determine transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels, as described above.

As further shown in Fig. 11, in some aspects, process 1100 may include transmitting DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords (block 1120) . For example, the base station (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like) may transmit DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords, as described above.

Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the transmission parameters identify multiple SRIs or multiple TPMIs for the uplink communication, and the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.

In a second aspect, alone or in combination with the first aspect, the transmission parameters identify multiple DMRS ports in multiple CDM groups for the uplink communication.

In a third aspect, alone or in combination with one or more of the first and second aspects, one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used by the UE to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used by the UE to transmit a second codeword.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, a first codeword is to be transmitted by the UE using a first scrambling sequence and a second codeword is to be transmitted by the UE using a second scrambling sequence.

Although Fig. 11 shows example blocks of process 1100, in some aspects, process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.

The following provides an overview of some Aspects of the present disclosure:

Aspect 1: A method of wireless communication performed by a UE, comprising: transmitting, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; receiving, from the base station, DCI indicating one or more parameters associated with a first codeword and a second codeword; and transmitting, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

Aspect 2: The method of Aspect 1, further comprising: receiving, from the base station, RRC signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.

Aspect 3: The method of Aspect 2, wherein the DCI includes a set of fields padded with zeros for the second codeword when the RRC signaling indicates that the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part is one.

Aspect 4: The method of any of Aspects 2-3, wherein the one or more parameters include a CBGTI that is scaled according to the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part.

Aspect 5: The method of any of Aspects 1-4, wherein the one or more parameters indicated in the DCI include one or more of an NDI, an MCS, or an RV for each of the first codeword and the second codeword.

Aspect 6: The method of any of Aspects 1-5, wherein transmitting the single uplink communication includes refraining from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.

Aspect 7: The method of Aspect 6, wherein the one or more fields include an MCS field having a first predefined value and an RV field having a second predefined value.

Aspect 8: The method of any of Aspects 1-7, wherein the one or more parameters include a DMRS antenna port indication including two or DMRS CDM groups to be used to transmit the first codeword and the second codeword using the different antenna panels.

Aspect 9: The method of any of Aspects 1-8, wherein the one or more parameters indicated in the DCI indicate a multi-layer precoder to be used to transmit the single uplink communication based at least in part on a configured mode for the single uplink communication.

Aspect 10: The method of Aspect 9, wherein the multi-layer precoder is indicated by separate uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is an NCJT mode.

Aspect 11: The method of Aspect 9, wherein the multi-layer precoder is indicated by multiple uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is a non-transparent joint transmission mode.

Aspect 12: The method of Aspect 9, wherein the multi-layer precoder is indicated by a single uplink TCI state, SRI, or TPMI for the first codeword and the second codeword when the configured mode is a transparent joint transmission mode.

Aspect 13: The method of any of Aspects 1-12, wherein transmitting the single uplink communication includes: multiplexing UCI carried on a PUCCH onto a PUSCH used to carry the first codeword and the second codeword.

Aspect 14: The method of Aspect 13, wherein the UCI is multiplexed onto the PUSCH by puncturing or rate-matching resource elements allocated to one or more of the first codeword or the second codeword.

Aspect 15: The method of Aspect 13, wherein the UCI is multiplexed onto layers associated with the first codeword and the second codeword based at least in part on the UCI including a number of bits that fails to satisfy a threshold or based at least in part on a type of the UCI.

Aspect 16: The method of Aspect 13, wherein the UCI is multiplexed onto layers associated with either the first codeword or the second codeword based at least in part on the UCI including a number of bits that satisfies a threshold or based at least in part on a type of the UCI.

Aspect 17: The method of Aspect 16, wherein multiplexing the UCI carried on the PUCCH onto the PUSCH includes: determining whether to multiplex the UCI onto the layers associated with the first codeword or the second codeword based at least in part on one or more metrics associated with the first codeword and the second codeword.

Aspect 18: The method of Aspect 17, wherein the UCI is multiplexed onto the layers associated with a default codeword when the one or more metrics are equal for the first codeword and the second codeword.

Aspect 19: A method of wireless communication performed by a base station, comprising: receiving, from a UE, an indication that the UE has a capability to transmit multiple codewords in one uplink communication; transmitting, to the UE, DCI indicating one or more parameters associated with a first codeword and a second codeword; and receiving, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.

Aspect 20: The method of Aspect 19, further comprising: transmitting, to the UE, RRC signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.

Aspect 21: The method of Aspect 20, wherein the DCI includes a set of fields padded with zeros for the second codeword when the RRC signaling indicates that the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part is one.

Aspect 22: The method of any of Aspects 20-21, wherein the one or more parameters include a code block group transmission indicator that is scaled according to the maximum number of uplink codewords scheduled by the DCI for the active bandwidth part.

Aspect 23: The method of any of Aspects 19-22, wherein the one or more parameters indicated in the DCI include one or more of an NDI, an MCS, or an RV for each of the first codeword and the second codeword.

Aspect 24: The method of any of Aspects 19-23, wherein the DCI causes the UE to refrain from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.

Aspect 25: The method of Aspect 24, wherein the one or more fields include an MCS field having a first predefined value and an RV field having a second predefined value.

Aspect 26: The method of any of Aspects 19-25, wherein the one or more parameters include a DMRS antenna port indication including two or DMRS CDM groups to be used to transmit the first codeword and the second codeword using the different antenna panels.

Aspect 27: The method of any of Aspects 19-26, wherein the one or more parameters indicated in the DCI indicate a multi-layer precoder to be used to transmit the single uplink communication based at least in part on a configured mode for the single uplink communication.

Aspect 28: The method of Aspect 27, wherein the multi-layer precoder is indicated by separate uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is an NCJT mode.

Aspect 29: The method of Aspect 27, wherein the multi-layer precoder is indicated by multiple uplink TCI states, SRIs, or TPMIs for the first codeword and the second codeword when the configured mode is a non-transparent joint transmission mode.

Aspect 30: The method of Aspect 27, wherein the multi-layer precoder is indicated by a single uplink TCI state, SRI, or TPMI for the first codeword and the second codeword when the configured mode is a transparent joint transmission mode.

Aspect 31: The method of any of Aspects 19-30, wherein the single uplink communication includes UCI carried on a PUCCH multiplexed onto a PUSCH used to carry the first codeword and the second codeword.

Aspect 32: The method of Aspect 31, wherein the UCI is multiplexed onto the PUSCH by puncturing or rate-matching resource elements allocated to one or more of the first codeword or the second codeword.

Aspect 33: The method of Aspect 31, wherein the UCI is multiplexed onto layers associated with the first codeword and the second codeword based at least in part on the UCI including a number of bits that fails to satisfy a threshold or based at least in part on a type of the UCI.

Aspect 34: The method of Aspect 31, wherein the UCI is multiplexed onto layers associated with either the first codeword or the second codeword based at least in part on the UCI including a number of bits that satisfies a threshold or based at least in part on a type of the UCI.

Aspect 35: The method of Aspect 34, wherein the UCI is multiplexed onto the layers associated with the first codeword or the second codeword based at least in part on one or more metrics associated with the first codeword and the second codeword.

Aspect 36: The method of Aspect 35, wherein the UCI is multiplexed onto the layers associated with a default codeword when the one or more metrics are equal for the first codeword and the second codeword.

Aspect 37: A method of wireless communication performed by a UE, comprising: determining an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and transmitting the uplink communication using the multiple codewords based at least in part on the association.

Aspect 38: The method of Aspect 37, further comprising: receiving DCI that identifies multiple SRIs or multiple TPMIs for the uplink communication, wherein the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.

Aspect 39: The method of any of Aspects 37-38, further comprising: receiving DCI that identifies multiple DMRS ports in multiple CDM groups for the uplink communication.

Aspect 40: The method of Aspect 39, wherein one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used to transmit a second codeword.

Aspect 41: The method of Aspect 40, wherein the one or more first DMRS ports are quasi-co-located with a first TCI state indicated by the DCI, and the one or more second DMRS ports are quasi-co-located with a second TCI state indicated by the DCI.

Aspect 42: The method of any of Aspects 37-41, wherein a first codeword is to be transmitted using a first scrambling sequence and a second codeword is to be transmitted using a second scrambling sequence.

Aspect 43: The method of Aspect 42, wherein a scrambling sequence for a codeword is based at least in part on an index value associated with the codeword.

Aspect 44: A method of wireless communication performed by a base station, comprising: determining transmission parameters for multiple codewords of a UE that are to be used for an uplink communication that uses multiple antenna panels; and transmitting DCI that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.

Aspect 45: The method of Aspect 44, wherein the transmission parameters identify multiple SRIs or multiple TPMIs for the uplink communication, and the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.

Aspect 46: The method of any of Aspects 44-45, wherein the transmission parameters identify multiple DMRS ports in multiple CDM groups for the uplink communication.

Aspect 47: The method of Aspect 46, wherein one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used by the UE to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used by the UE to transmit a second codeword.

Aspect 48: The method of Aspect 47, wherein the one or more first DMRS ports are quasi-co-located with a first TCI state indicated by the DCI, and the one or more second DMRS ports are quasi-co-located with a second TCI state indicated by the DCI.

Aspect 49: The method of any of Aspects 44-48, wherein a first codeword is to be transmitted by the UE using a first scrambling sequence and a second codeword is to be transmitted by the UE using a second scrambling sequence.

Aspect 50: The method of Aspect 49, wherein a scrambling sequence for a codeword is based at least in part on an index value associated with the codeword.

Aspect 51: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 1-18.

Aspect 52: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 1-18.

Aspect 53: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 1-18.

Aspect 54: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 1-18.

Aspect 55: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 1-18.

Aspect 56: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 19-36.

Aspect 57: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 19-36.

Aspect 58: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 19-36.

Aspect 59: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 19-36.

Aspect 60: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 19-36.

Aspect 61: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 37-43.

Aspect 62: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 37-43.

Aspect 63: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 37-43.

Aspect 64: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 37-43.

Aspect 65: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 37-43.

Aspect 66: An apparatus for wireless communication at a device, comprising a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method of one or more Aspects of Aspects 44-50.

Aspect 67: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more Aspects of Aspects 44-50.

Aspect 68: An apparatus for wireless communication, comprising at least one means for performing the method of one or more Aspects of Aspects 44-50.

Aspect 69: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more Aspects of Aspects 44-50.

Aspect 70: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more Aspects of Aspects 44-50.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

As used herein, the term “component” is intended to be broadly construed as hardware and/or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and/or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a processor is implemented in hardware and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) , and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

Claims

A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to:

transmit, to a base station, an indication that the UE has a capability to transmit multiple codewords in one uplink communication;

receive, from the base station, downlink control information (DCI) indicating one or more parameters associated with a first codeword and a second codeword; and

transmit, to the base station, a single uplink communication that includes the first codeword and the second codeword using different antenna panels based at least in part on the one or more parameters indicated in the DCI.
The UE of claim 1, wherein the memory and the one or more processors are further configured to:

receive, from the base station, radio resource control (RRC) signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.
The UE of claim 1, wherein the one or more parameters indicated in the DCI include one or more of a new data indicator, a modulation and coding scheme, or a redundancy version for each of the first codeword and the second codeword.
The UE of claim 1, wherein transmitting the single uplink communication includes refraining from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.
The UE of claim 1, wherein the one or more parameters include a demodulation reference signal (DMRS) antenna port indication including two or DMRS code division multiplexing (CDM) groups to be used to transmit the first codeword and the second codeword using the different antenna panels.
The UE of claim 1, wherein the one or more parameters indicated in the DCI indicate a multi-layer precoder to be used to transmit the single uplink communication based at least in part on a configured mode for the single uplink communication.
The UE of claim 6, wherein the multi-layer precoder is indicated by one or more uplink transmission configuration indication states, sounding reference signal resource indicators, or transmit precoder matrix indicators for the first codeword and the second codeword based at least in part on the configured mode.
The UE of claim 1, wherein the memory and the one or more processors are further configured, when transmitting the single uplink communication, to:

multiplex uplink control information (UCI) carried on a physical uplink control channel (PUCCH) onto a physical uplink shared channel (PUSCH) used to carry the first codeword and the second codeword.
A base station for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to:

receive, from a user equipment (UE) , an indication that the UE has a capability to transmit multiple codewords in one uplink communication;

transmit, to the UE, downlink control information (DCI) indicating one or more parameters associated with a first codeword and a second codeword; and

receive, from the UE, a single uplink communication that includes the first codeword and the second codeword, wherein the first codeword and the second codeword are transmitted by the UE using different antenna panels based at least in part on the one or more parameters indicated in the DCI.
The base station of claim 9, wherein the memory and the one or more processors are further configured to:

transmit, to the UE, radio resource control (RRC) signaling indicating a maximum number of uplink codewords scheduled by the DCI for an active bandwidth part to be used for transmitting the single uplink communication.
The base station of claim 9, wherein the one or more parameters indicated in the DCI include one or more of a new data indicator, a modulation and coding scheme, or a redundancy version for each of the first codeword and the second codeword.
The base station of claim 9, wherein the DCI causes the UE to refrain from transmitting the second codeword based at least in part on one or more fields in the DCI including predefined values for the one or more parameters.
The base station of claim 9, wherein the one or more parameters include a demodulation reference signal (DMRS) antenna port indication including two or DMRS code division multiplexing (CDM) groups to be used to transmit the first codeword and the second codeword using the different antenna panels.
The base station of claim 9, wherein the one or more parameters indicated in the DCI indicate a multi-layer precoder to be used to transmit the single uplink communication based at least in part on a configured mode for the single uplink communication.
The base station of claim 14, wherein the multi-layer precoder is indicated by one or more uplink transmission configuration indication states, sounding reference signal resource indicators, or transmit precoder matrix indicators for the first codeword and the second codeword based at least in part on the configured mode.
The base station of claim 9, wherein the single uplink communication includes uplink control information (UCI) carried on a physical uplink control channel (PUCCH) multiplexed onto a physical uplink shared channel (PUSCH) used to carry the first codeword and the second codeword.
A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to:

determine an association between sets of transmission layers and multiple codewords that are to be used for an uplink communication that uses multiple antenna panels; and

transmit the uplink communication using the multiple codewords based at least in part on the association.
The UE of claim 17, wherein the memory and the one or more processors are further configured to:

receive downlink control information that identifies multiple sounding reference signal resource indicators (SRIs) or multiple transmit precoder matrix indicators (TPMIs) for the uplink communication,

wherein the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.
The UE of claim 17, wherein the memory and the one or more processors are further configured to:

receive downlink control information (DCI) that identifies multiple demodulation reference signal (DMRS) ports in multiple code-division multiplexing (CDM) groups for the uplink communication.
The UE of claim 19, wherein one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used to transmit a second codeword.
The UE of claim 20, wherein the one or more first DMRS ports are quasi-co-located with a first transmission configuration indication (TCI) state indicated by the DCI, and the one or more second DMRS ports are quasi-co-located with a second TCI state indicated by the DCI.
The UE of claim 17, wherein a first codeword is to be transmitted using a first scrambling sequence and a second codeword is to be transmitted using a second scrambling sequence.
The UE of claim 22, wherein a scrambling sequence for a codeword is based at least in part on an index value associated with the codeword.
A base station for wireless communication, comprising:

a memory; and

one or more processors coupled to the memory, the memory and the one or more processors configured to:

determine transmission parameters for multiple codewords of a user equipment (UE) that are to be used for an uplink communication that uses multiple antenna panels; and

transmit downlink control information (DCI) that identifies the transmission parameters to enable the UE to determine an association between sets of transmission layers and the multiple codewords.
The base station of claim 24, wherein the transmission parameters identify multiple sounding reference signal resource indicators (SRIs) or multiple transmit precoder matrix indicators (TPMIs) for the uplink communication, and the sets of transmission layers are indicated by the multiple SRIs or the multiple TPMIs.
The base station of claim 24, wherein the transmission parameters identify multiple demodulation reference signal (DMRS) ports in multiple code-division multiplexing (CDM) groups for the uplink communication.
The base station of claim 26, wherein one or more first DMRS ports in a first CDM group are associated with a first set of layers that are to be used by the UE to transmit a first codeword, and one or more second DMRS ports in a second CDM group are associated with a second set of layers that are to be used by the UE to transmit a second codeword.
The base station of claim 27, wherein the one or more first DMRS ports are quasi-co-located with a first transmission configuration indication (TCI) state indicated by the DCI, and the one or more second DMRS ports are quasi-co-located with a second TCI state indicated by the DCI.
The base station of claim 24, wherein a first codeword is to be transmitted by the UE using a first scrambling sequence and a second codeword is to be transmitted by the UE using a second scrambling sequence.
The base station of claim 29, wherein a scrambling sequence for a codeword is based at least in part on an index value associated with the codeword.