WO2021189233A1

WO2021189233A1 - Dci transmitted with downlink data

Info

Publication number: WO2021189233A1
Application number: PCT/CN2020/080831
Authority: WO
Inventors: Fang Yuan; Mehmet Izzet Gurelli; Wooseok Nam; Mostafa KHOSHNEVISAN; Xiaoxia Zhang; Tao Luo; Qiang Wu
Original assignee: Qualcomm Incorporated
Priority date: 2020-03-24
Filing date: 2020-03-24
Publication date: 2021-09-30

Abstract

A configuration to allow a UE to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers. The apparatus receives, from a base station, a first DCI on a PDCCH. The apparatus receives, from the base station, a second DCI on a PDSCH. The first DCI schedules the transmission of the PDSCH having the second DCI. The apparatus receives a configuration for a scheduled uplink or downlink transmission based on the second DCI. The second DCI is associated with a layer of the PDSCH having the second DCI having a lowest DMRS port ID.

Description

DCI TRANSMITTED WITH DOWNLINK DATA

BACKGROUND

Technical Field

The present disclosure relates generally to communication systems, and more particularly, to new radio (NR) uplink multiple input multiple output (MIMO) design.

Introduction

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. 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, and time division synchronous code division multiple access (TD-SCDMA) systems.

These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR) . 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra reliable low latency communications (URLLC) . Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.

SUMMARY

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a user equipment (UE) . The device may be a processor and/or a modem at a UE. The apparatus receives, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) . The apparatus receives, from the base station, a second DCI on a physical downlink shared channel (PDSCH) . The first DCI schedules the transmission of the PDSCH having the second DCI. The apparatus receives a configuration for a scheduled uplink or downlink transmission based on the second DCI. The second DCI may be associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .

In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a UE. The device may be a processor and/or a modem at a UE. The apparatus receives, from a base station, a first DCI on a PDCCH. The first DCI schedules an uplink control information (UCI) . The apparatus receives, from the base station, a second DCI on a subsequent PDCCH. The second DCI schedules a physical uplink control channel (PUSCH) for the transmission of the UCI. The apparatus transmits the UCI on the PUSCH based on the second DCI. The UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.

In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The device may be a processor and/or a modem at a base station. The apparatus transmits, to a UE, a first DCI on a PDCCH. The apparatus transmits, to the UE, a second DCI on a subsequent PDCCH. The second DCI schedules the a PUSCH for the transmission of the UCI. The apparatus receives, from the UE, an uplink transmission of the PUSCH based on the UCI. The UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) in a code word of the PUSCH.

In another aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a device at a base station. The device may be a processor and/or a modem at a base station. The apparatus transmits, to a UE, a first DCI on a PDCCH. The first DCI schedules a UCI. The apparatus transmits, to the UE, a second DCI on a subsequent PDCCH. The second DCI schedules a PUSCH for the transmission of the UCI. The apparatus receives, from the UE, an uplink transmission on the PUSCH based on the UCI. The UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.

To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.

FIGs. 2A, 2B, 2C, and 2D are diagrams illustrating examples of a first 5G/NR frame, DL channels within a 5G/NR subframe, a second 5G/NR frame, and UL channels within a 5G/NR subframe, respectively.

FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.

FIG. 4A is a diagram illustrating a DCI transmission.

FIG. 4B is a diagram illustrating a UCI transmission.

FIG. 5 is a call flow diagram illustrating signaling between a UE and a base station.

FIG. 6 is a diagram illustrating data and DCI transmission according to an aspect of the disclosure.

FIG. 7 is a call flow diagram illustrating signaling between a UE and a base station.

FIG. 8A is a first diagram illustrating data and UCI transmission according to an aspect of the disclosure.

FIG. 8B is a second diagram illustrating data and UCI transmission according to an aspect of the disclosure.

FIG. 9 is a flowchart of a method of wireless communication.

FIG. 10 is a flowchart of a method of wireless communication.

FIG. 11 is a flowchart of a method of wireless communication.

FIG. 12 is a flowchart of a method of wireless communication.

DETAILED DESCRIPTION

The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

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

By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, field programmable gate arrays (FPGAs) , programmable logic devices (PLDs) , state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.

Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100. The wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, UEs 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) . The base stations 102 may include macrocells (high power cellular base station) and/or small cells (low power cellular base station) . The macrocells include base stations. The small cells include femtocells, picocells, and microcells.

The base stations 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) may interface with the EPC 160 through first backhaul links 132 (e.g., S1 interface) . The base stations 102 configured for 5G NR (collectively referred to as Next Generation RAN (NG-RAN) ) may interface with core network 190 through second backhaul links 184. In addition to other functions, the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages. The base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface) . The third backhaul links 134 may be wired or wireless.

The base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102' may have a coverage area 110' that overlaps the coverage area 110 of one or more macro base stations 102. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) . The communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and/or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104. The communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and/or transmit diversity. The communication links may be through one or more carriers. The base stations 102 /UEs 104 may use spectrum up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) . The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .

Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL/UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) . D2D communication may be through a variety of wireless D2D communications systems, such as for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, LTE, or NR.

The wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154 in a 5 GHz unlicensed frequency spectrum. When communicating in an unlicensed frequency spectrum, the STAs 152 /AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.

The small cell 102' may operate in a licensed and/or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed frequency spectrum as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and/or increase capacity of the access network.

A base station 102, whether a small cell 102' or a large cell (e.g., macro base station) , may include and/or be referred to as an eNB, gNodeB (gNB) , or another type of base station. Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave (mmW) frequencies, and/or near mmW frequencies in communication with the UE 104. When the gNB 180 operates in mmW or near mmW frequencies, the gNB 180 may be referred to as an mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 millimeter and 10 millimeters. Radio waves in the band may be referred to as a millimeter wave. Near mmW may extend down to a frequency of 3 GHz with a wavelength of 100 millimeters. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the mmW /near mmW radio frequency band (e.g., 3 GHz –300 GHz) has extremely high path loss and a short range. The mmW base station 180 may utilize beamforming 182 with the UE 104 to compensate for the extremely high path loss and short range. The base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and/or antenna arrays to facilitate the beamforming.

The base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182” . The UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions. The base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 180 /UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 /UE 104. The transmit and receive directions for the base station 180 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.

The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be in communication with a Home Subscriber Server (HSS) 174. The MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation as well as other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176. The IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start/stop) and for collecting eMBMS related charging information.

The core network 190 may include a Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may be in communication with a Unified Data Management (UDM) 196. The AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190. Generally, the AMF 192 provides QoS flow and session management. All user Internet protocol (IP) packets are transferred through the UPF 195. The UPF 195 provides UE IP address allocation as well as other functions. The UPF 195 is connected to the IP Services 197. The IP Services 197 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and/or other IP services.

The base station may include and/or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology. The base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104. Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor/actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) . The UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

Referring again to FIG. 1, in certain aspects, the UE 104 may be configured to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers. For example, the UE 104 may include a control information component 198 configured to receive a configuration for a scheduled uplink or downlink transmission based on a DCI. In some aspects, the UE 104 may receive, from a base station, a first DCI on a PDCCH. The UE 104 may receive, from the base station, a second DCI on a PDSCH. The first DCI may schedule the transmission of the PDSCH having the second DCI. The UE 104 may receive a configuration for a scheduled uplink or downlink transmission based on the second DCI. The second DCI may be associated with a layer of the PDSCH having a lowest DMRS port ID. In some aspects, the UE 104 may receive, from the base station, a first DCI on a PDCCH, where the first DCI schedules a UCI. The UE 104 may receive, from the base station, a second DCI on a subsequent PDCCH, where the second DCI schedules a PUSCH for the transmission of the UCI. The UE 104 may transmit the UCI on the PUSCH based on the second DCI, where the UCI may be associated with a layer of the PUSCH with a PTRS port in a code word of the PUSCH.

Referring again to FIG. 1, in certain aspects, the base station 180 may be configured to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers. For example, the base station 180 may include a configuration component 199 configured to schedule uplink or downlink transmissions based on a DCI. In some aspects, the base station 180 may transmit, to a UE 104, a first DCI on a PDCCH. The base station 180 may transmit, to the UE 104, a second DCI on a PDSCH, where the first DCI schedules the transmission of the PDSCH having the second DCI. The base station 180 may schedule an uplink or downlink transmission based on the second DCI, where the second DCI is associated with a layer of the PDSCH having a lowest DMRS port ID. In some aspects, the base station 180 may transmit, to the UE 104, a first DCI on a PDCCH, where the first DCI schedules a UCI. The base station 180 may transmit, to the UE 104, a second DCI on a subsequent PDCCH, where the second DCI schedules a PUSCH for the transmission of the UCI. The base station 180 may receive, from the UE 104, an uplink transmission on the PUSCH based on the UCI, where the UCI is associated with a layer of the PUSCH associated with a PTRS port in a code word of the PUSCH.

Although the following description may be focused on 5G NR, the concepts described herein may be applicable to other similar areas, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G/NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G/NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G/NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G/NR subframe. The 5G/NR frame structure may be FDD in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be TDD in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G/NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and X is flexible for use between DL/UL, and subframe 3 being configured with slot format 34 (with mostly UL) . While

subframes

3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically/statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) . Note that the description infra applies also to a 5G/NR frame structure that is TDD.

Other wireless communication technologies may have a different frame structure and/or different channels. A frame (10 ms) may be divided into 10 equally sized subframes (1 ms) . Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) OFDM (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission) . The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies μ 0 to 5 allow for 1, 2, 4, 8, 16, and 32 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols/slot and 2 ^μ slots/subframe. The subcarrier spacing and symbol length/duration are a function of the numerology. The subcarrier spacing may be equal to 2 ^μ*15 kHz, where μ is the numerology 0 to 5. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=5 has a subcarrier spacing of 480 kHz. The symbol length/duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs.

A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.

As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include demodulation RS (DM-RS) (indicated as R _x for one particular configuration, where 100x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .

FIG. 2B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe/symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) /PBCH block. The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.

As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) . The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS) . The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

FIG. 2D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and HARQ ACK/NACK feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and/or UCI.

FIG. 3 is a block diagram of a base station 310 in communication with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller/processor 375. The controller/processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller/processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression /decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding/decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation/demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and/or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and/or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a respective spatial stream for transmission.

At the UE 350, each receiver 354RX receives a signal through its respective antenna 352. Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 310. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 310 on the physical channel. The data and control signals are then provided to the controller/processor 359, which implements layer 3 and layer 2 functionality.

The controller/processor 359 can be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller/processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller/processor 359 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

Similar to the functionality described in connection with the DL transmission by the base station 310, the controller/processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression /decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.

The UL transmission is processed at the base station 310 in a manner similar to that described in connection with the receiver function at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.

The controller/processor 375 can be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller/processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 350. IP packets from the controller/processor 375 may be provided to the EPC 160. The controller/processor 375 is also responsible for error detection using an ACK and/or NACK protocol to support HARQ operations.

At least one of the TX processor 368, the RX processor 356, and the controller/processor 359 may be configured to perform aspects in connection with 198 of FIG. 1.

At least one of the TX processor 316, the RX processor 370, and the controller/processor 375 may be configured to perform aspects in connection with 199 of FIG. 1.

Multiple Input Multiple Output (MIMO) may be utilized in wireless communication systems. MIMO may utilize multiple antennas to use multiple path propagations to improve signal performance. Scheduling an uplink or a downlink transmission in MIMO may occur over multiple transmissions of control information (e.g., DCI or UCI) , which could lead to an increase in signaling. As such, there is a need to improve the manner in which control information is provided and reduce the amount of transmissions utilized to provide the control information.

FIG. 4A is an example 400 illustrating a DCI transmission. In the example 400 a DCI1 402 is transmitted on a PDCCH (not shown) . The DCI1 402 may schedule a downlink channel PDSCH 404. DCI1 402 may schedule a PDSCH1 404. Within the PDSCH1 404, there could be some other control information, such as a DCI2 406. The DCI2 406 may schedule another channel PxSCH2 408 for downlink or uplink transmission (e.g., PDSCH or PUSCH) based on the information related to DCI2 406. The DCI2 460 may be associated or piggy backed on the PDSCH1 404.

FIG. 4B is an example 420 illustrating a UCI transmission. A DCI1 422 may schedule an uplink transmission (e.g., UCI 426) . A DCI2 424 may schedule a channel PxSCH 428 for uplink transmission (e.g., PUSCH) . The DCI1 and DCI2 may each be transmitted on separate PDCCH channels. The UCI 426 may be within the PxSCH 428, such that the UCI 426 may be associated or piggy backed on the PxSCH 428. In this example, PxSCH 428 can be a PUSCH.

The UE may determine the amount of REs occupied by the control information XCI (e.g., DCI or UCI) based on the following equation:

XCI _i is the number of payload of XCI type i, L _q is the number of layers for the code word q in the PxSCH 428. The PxSCH428 may be scheduled to have two codewords, and thus q=0 or 1 respectively for the first and second code word. In some aspects, the code word may comprise one or more layers. For example, in some aspects, the code word may comprise four layers. However, in other aspects, the code word may comprise more or less than four layers and is not intended to be limited to the aspects disclosed herein.

can be signaled in the DCI scheduling the PxSCH. For example, when the XCI is UCI, the value i can refer to a UCI type: for UCI, i = 0 for HARQ-ACK, i = 1 for CSI part 2. In some aspects, when the XCI is DCI, the value i can refer to 1 ^st stage DCI for i = 0, 2 ^nd stage DCI for i = 1, or 1 ^st DCI i = 0, 2 ^nd DCI for i = 1.

C _XL-SCH is the number of code blocks for XL-SCH of the PXSCH transmission in the code word q.

If the DCI format scheduling the qth code word of PXSCH transmission includes a CBGTI field indicating that the UE shall not transmit the r -th code block, K _r, q=0; otherwise, K _r, q is the r -th code block size for XL-SCH of the PXSCH transmission. If there are two code words transmitted, the UE may determine the RE occupied by the uplink UCI or downlink DCI using the equation. For example, if the first code word is mapped with X control information, then q is equal to 0. If the second code word is determined to map the control information, then q is equal to 1.

is the scheduled bandwidth of the PXSCH transmission, expressed as a number of subcarriers.

is the number of resource elements that can be used for transmission of XCI in OFDM symbol l in a layer.

α is configured by higher layer parameter scaling.

FIG. 5 is a call flow diagram 500 illustrating signaling between a UE 502 and a base station 504. FIG. 6 is a diagram 600 illustrating data and DCI transmission. As illustrated in FIG. 5, the UE 502 receives, from the base station 504, a first DCI 506 on a PDCCH. The UE 502 receives, from the base station 504, a second DCI 508 on a PDSCH. The first DCI 506 may schedule transmission of the PDSCH having the second DCI 508. The UE 502 receives a configuration 510 for a scheduled uplink or downlink transmission. The configuration 510 for the scheduled uplink or downlink transmission may be based on the second DCI 508. The second DCI 508 may be associated with a layer of the PDSCH having a lowest DMRS port ID.

In some aspects, the second DCI 508 may be associated with the PDSCH based on an order. For example, the second DCI may be associated with the layer of the transmission of the PDSCH having the second DCI based on a first layer having the lowest DMRS port ID for a code word, or a second layer having a second lowest DMRS port ID for the code word. In some aspects, if the code word comprises more than one code word, the second DCI 508 may be associated with the code word having a higher MCS. The second DCI 508 may be associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) . In some aspects, an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers. In some aspects, the second DCI 508 and the PDSCH may be transmitted concurrently on different layers. For example, as shown in FIG. 6, the DCI 602 may be transmitted on a first layer layer0 606 and partially on a second layer layer1 608. The PDSCH or data 604 may be transmitted partially on the second layer layer1 608 and on a third layer layer2 610. The aspect of FIG. 6 includes three layers (e.g., 606, 608, 610) , but the disclosure is not intended to be limited to the aspects disclosed herein. In some aspects, there can be more or less than three layers.

FIG. 7 is a call flow diagram 700 illustrating signaling between a UE 702 and a base station 704. FIG. 8A is a first diagram 800 illustrating data and UCI transmission. FIG. 8B is a second diagram 820 illustrating data and UCI transmission. As illustrated in FIG. 7, the UE 702 receives, from the base station 704, a first DCI 706 on a PDCCH. The first DCI 706 may schedule a UCI. The UE 702 receives, from the base station 704, a second DCI 708 on a subsequent PDCCH. The second DCI 708 may schedule a PUSCH for transmission of the UCI. The UE 702 transmits, to the base station 704, the UCI 710 on the PUSCH based on the second DCI 708. The UCI 710 may be associated with a layer of the PUSCH associated with a PTRS port in a code word of the PUSCH.

In some aspects, the code word may comprise more than one PTRS port. In such aspects, the UCI 710 may be associated with one of the more than one PTRS ports based on a frequency and time order. In some aspects, if the code word comprises more than one code word, the UCI may be associated with the code word having a higher MCS. In some aspects, the UCI may be associated with a first code word of the more than one code word, if each of the more than one code words have the same MCS. In some aspects, the UCI may be associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmission. For example, as shown in FIG. 8B, the UCI may be transmitted on PUSCH1, which may be associated with the second DMRS port 824 in one transmission, while being associated with the first DMRS port 822 is another transmission. The PUSCH1, when associated with the second DMRS port 824, may be associated with the PTRS port0 826. The PUSCH1, when associated with the first DMRS port 822, may be associated with the PTRS port1 828. In some aspects, the UCI and the PUSCH may be transmitted concurrently on different layers. For example, as shown in FIG. 8A, the UCI 802 may be transmitted on a first layer layer0 806, while the data on the PUSCH may be transmitted on a second layer layer1 808.

In some aspects, for example at 712, the UE 702 may omit the UCI within the transmission of the PUSCH. The UE 702 may omit the UCI within the transmission of the PUSCH if a UCI payload includes a large data code rate that exceeds the layers.

FIG. 9 is a flowchart 900 of a method of wireless communication. The method may be performed by a UE (e.g., the

UE

104, 502, 702; device 350; a processing system, which may include the memory and component configured to perform each of the blocks of the method, and which may be the entire UE or a component of the UE, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) . According to various aspects, one or more of the illustrated operations of the method 900 may be omitted, transposed, and/or contemporaneously performed. The method may allow a UE to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers.

At 902, the UE may receive a first DCI on a PDCCH. The UE may receive the first DCI on the PDCCH from a base station. For example, referring to FIG. 5, the UE 502 receives a first DCI 506, from the base station 504, on a PDCCH.

At 904, the UE may receive a second DCI on a PDSCH. The UE may receive the second DCI on the PDSCH from the base station. The first DCI may schedule transmission of the PDSCH having the second DCI. For example, referring to FIG. 5, the UE 502 receives a second DCI 508, from the base station 504, on a PDSCH. In some aspects, the second DCI and the PDSCH may be transmitted concurrently on different layers.

At 906, the UE may receive a configuration for a scheduled uplink or downlink transmission. The UE may receive the configuration for the scheduled uplink or downlink transmission from the base station. For example, referring to FIG. 5, the UE 502 receives a configuration 510 for a scheduled uplink or downlink transmission from the base station 504. In some aspects, the second DCI may be associated with a layer of the PDSCH having the second DCI having a lowest DMRS port ID. In some aspects, the second DCI may be associated with the PDSCH based on an order. For example, the second DCI may be associated with the layer of the transmission of the PDSCH having the second DCI based on a first layer having the lowest DMRS port ID for a code word, or a second layer having the second lowest DMRS port ID for the code word. In some aspects, if the code word comprise more than one code word, the second DCI may be associated with the code word having a higher MCS. The second DCI may be associated with a first code word if the PDSCH comprises two code words having the same MCS. In some aspects, the order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.

An apparatus may be provided that includes components the perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 9, and aspects of the communication flow in FIG. 5. As such, each block in the aforementioned flowchart of FIG. 9 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

FIG. 10 is a flowchart 1000 of a method of wireless communication. The method may be performed by a UE (e.g., the

UE

104, 502, 702; device 350; a processing system, which may include the memory and component configured to perform each of the blocks of the method, and which may be the entire UE or a component of the UE, such as the TX processor 368, the RX processor 356, and/or the controller/processor 359) . According to various aspects, one or more of the illustrated operations of the method 1000 may be omitted, transposed, and/or contemporaneously performed. The method may allow a UE to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers.

At 1002, the UE may receive a first DCI on a PDCCH. The UE may receive the first DCI on the PDCCH from the base station. For example, referring to FIG. 7, the UE 702 receives a first DCI 706 on a PDCCH from the base station 704. The first DCI may schedule a UCI.

At 1004, the UE may receive a second DCI on a subsequent PDCCH. The UE may receive the second DCI on the subsequent PDCCH from the base station. For example, referring to FIG. 7, the UE 702 receives a second DCI 708 on a subsequent PDCCH from the base station 704. The second DCI may schedule a PUSCH for transmission of the UCI.

At 1006, the UE may transmit the UCI on the PUSCH based on the second DCI. The UE may transmit the UCI on the PUSCH based on the second DCI to the base station. For example, referring to FIG. 7, the UE 702 transmits the UCI 710 on a PUSCH based on the second DCI 708 to the base station 704. The UCI may be associated with a layer of the PUSCH associated with a PTRS port in a code word of the PUSCH. In some aspects, the code word may comprise more than one PTRS port. In such aspects, the UCI may be associated with one of the more than one PTRS ports based on a frequency and time order. In some aspects, if the code word comprises more than one code word, the UCI may be associated with the code word having a higher MCS. In some aspects, the UCI may be associated with a first code word of the more than one code word, if each of the more than one code words have the same MCS. In some aspects, the UCI may be associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmission. In some aspects, the UCI and the PUSCH may be transmitted concurrently on different layers.

In some aspects, for example at 1008, the UE may omit the UCI. The UE may omit the UCI from the PUSCH if a UCI payload includes a large data code rate that exceeds the layers. For example, referring to FIG. 7, the UE 702 may omit the UCI at 712.

An apparatus may be provided that includes components the perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 10, and aspects of the communication flow in FIG. 7. As such, each block in the aforementioned flowchart of FIG. 10 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

FIG. 11 is a flowchart 1100 of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., the

base station

102, 180, 504, 704; the device 310; a processing system, which may include the memory and components configured to perform each of the blocks of the method, and which may be the entire base station or a component of the base station, such as the TX processor 316, the RX processor 370, and/or the controller/processor 375) . According to various aspects, one or more of the illustrated operations of the method 1100 may be omitted, transposed, and/or contemporaneously performed. Optional aspects are illustrated with a dashed line. The method may configure a UE to transmit or receive control information on a downlink or uplink channel that is mapped to specific layers.

At 1102, the base station may transmit a first DCI on a PDCCH. The base station may transmit the first DCI on the PDCCH to a UE. For example, referring to FIG. 5, the base station 504 transmits the first DCI 506 to the UE 502 on a PDCCH.

At 1104, the base station may transmit a second DCI on a PDSCH. The base station may transmit the second DCI on the PDSCH to the UE. The first DCI may schedule transmission of the PDSCH having the second DCI. For example, referring to FIG. 5, the base station 504 transmits the second DCI 508 to the UE 502 on a PDSCH. In some aspects, the second DCI and the PDSCH may be transmitted concurrently on different layers.

At 1106, the base station may schedule an uplink or a downlink transmission. The base station may transmit a configuration having the scheduled uplink or downlink transmission to the UE. For example, referring to FIG. 5, the base station 504 transmits a configuration 510 for a scheduled uplink or downlink transmission to the UE 502. The second DCI may be associated with a layer of the PDSCH having the second DCI having a lowest DMRS port ID. In some aspects, the second DCI may be associated with the PDSCH based on an order. For example, the second DCI may be associated with the layer of the transmission of the PDSCH having the second DCI based on a first layer having the lowest DMRS port ID for a code word, or a second layer having the second lowest DMRS port ID for the code word. The second DCI may be associated with a first code word if the PDSCH comprises two code words having the same MCS. In some aspects, an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.

An apparatus may be provided that includes components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 11, and aspects of the communication flow in FIG. 5. As such, each block in the aforementioned flowchart of FIG. 11 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

FIG. 12 is a flowchart 1200 of a method of wireless communication. The method may be performed by a base station or a component of a base station (e.g., the

base station

At 1202, the base station may transmit a first DCI on a PDCCH. The base station may transmit the first DCI on the PDCCH to the UE. For example, referring to FIG. 7, the base station 704 transmits a first DCI 706 on a PDCCH to the UE 702. The first DCI may schedule a UCI.

At 1204, the base station may transmit a second DCI on a subsequent PDCCH. The base station may transmit the second DCI on the subsequent PDCCH to the UE. For example, referring to FIG. 7, the base station 704 transmits a second DCI 708 on a subsequent PDCCH to the UE 702. The second DCI may schedule a PUSCH for transmission of the UCI.

At 1206, the base station may receive an uplink transmission on the PUSCH based on the UCI. The base station may receive the uplink transmission on the PUSCH based on the UCI from the UE. For example, referring to FIG. 7, the base station 704 receives the UCI 710 on a PUSCH from the UE 702. The UCI may be associated with a layer of the PUSCH associated with a PTRS port in a code word of the PUSCH. In some aspects, the code word may comprise more than one PTRS port. In such aspects, the UCI may be associated with one of the more than one PTRS ports based on a frequency and time order. In some aspects, if the code word comprises more than one code word, the UCI may be associated with the code word having a higher MCS. In some aspects, the UCI may be associated with a first code word of the more than one code word, if each of the more than one code words have the same MCS. In some aspects, the UCI may be associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmission. In some aspects, the UCI may be omitted from the PUSCH if a UCI payload includes a large data code rate that exceeds the layers. In some aspects, the UCI and the PUSCH may be transmitted concurrently on different layers.

An apparatus may be provided that includes components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 12, and aspects of the communication flow in FIG. 7. As such, each block in the aforementioned flowchart of FIG. 12 may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes/algorithm, implemented by a processor configured to perform the stated processes/algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.

It is understood that the specific order or hierarchy of blocks in the processes /flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes /flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented.

The previous description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language claims, wherein reference to an element in the singular is not intended to mean “one and only one” unless specifically so stated, but rather “one or more. ” The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and/or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”

Claims

receiving, from the base station a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

transmitting the UCI on the PUSCH based on the second DCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The method of claim 6, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The method of claim 6, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The method of claim 6, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The method of claim 6, further comprising:

omitting the UCI if a UCI payload includes a large data code rate that exceeds the layers.
The method of claim 6, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The method of claim 6, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a user equipment (UE) , comprising:

means for receiving, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

means for receiving, from the base station, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules transmission of the PDSCH having the second DCI; and

means for receiving a configuration for a scheduled uplink or downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
The apparatus of claim 13, wherein an order that the second DCI is associated with the layer of the transmission of the PDSCH having the second DCI comprises a first layer having the lowest DMRS port ID for a code word or a second layer having the second lowest DMRS port ID for the code word.
The apparatus of claim 14, wherein the second DCI is associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) .
The apparatus of claim 13, wherein an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.
The apparatus of claim 13, wherein the second DCI and the PDSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a user equipment (UE) , comprising:

means for receiving, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

means for receiving, from the base station a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

means for transmitting the UCI on the PUSCH based on the second DCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The apparatus of claim 18, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The apparatus of claim 18, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The apparatus of claim 18, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The apparatus of claim 18, further comprising:

means for omitting the UCI if a UCI payload includes a large data code rate that exceeds the layers.
The apparatus of claim 18, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The apparatus of claim 18, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a user equipment (UE) , comprising:

a memory; and

at least one processor coupled to the memory and configured to:

receive, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

receive, from the base station, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules transmission of the PDSCH having the second DCI; and

receive a configuration for a scheduled uplink or downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
The apparatus of claim 25, wherein an order that the second DCI is associated with the layer of the transmission of the PDSCH having the second DCI comprises a first layer having the lowest DMRS port ID for a code word or a second layer having the second lowest DMRS port ID for the code word.
The apparatus of claim 26, wherein the second DCI is associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) .
The apparatus of claim 25, wherein an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.
The apparatus of claim 25, wherein the second DCI and the PDSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a user equipment (UE) , comprising:

a memory; and

at least one processor coupled to the memory and configured to:

receive, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

receive, from the base station a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

transmit the UCI on the PUSCH based on the second DCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The apparatus of claim 30, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The apparatus of claim 30, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The apparatus of claim 30, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The apparatus of claim 30, wherein the at least one processor further configured to:

omit the UCI if a UCI payload includes a large data code rate that exceeds the layers.
The apparatus of claim 30, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The apparatus of claim 30, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
A computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:

receive, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

receive, from the base station, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules transmission of the PDSCH having the second DCI; and

receive a configuration for a scheduled uplink or downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
A computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:

receive, from a base station, a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

receive, from the base station a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

transmit the UCI on the PUSCH based on the second DCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
A method of wireless communication at a base station, comprising:

transmitting, to a User Equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

transmitting, to the UE, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules transmission of the PDSCH having the second DCI; and

scheduling an uplink or a downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
The method of claim 39, wherein an order that the second DCI is associated with the layer of the transmission of the PDSCH having the second DCI comprises a first layer having the lowest DMRS port ID for a code word or a second layer having the second lowest DMRS port ID for the code word.
The method of claim 40, wherein the second DCI is associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) .
The method of claim 39, wherein an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.
The method of claim 39, wherein the second DCI and the PDSCH are transmitted concurrently on different layers.
A method of wireless communication at a base station, comprising:

transmitting, to a User Equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

transmitting, to the UE, a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

receiving, from the UE, an uplink transmission on the PUSCH based on the UCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The method of claim 44, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The method of claim 44, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The method of claim 46, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The method of claim 44, wherein the UCI is omitted if a UCI payload includes a large data code rate that exceeds the layers.
The method of claim 44, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The method of claim 44, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a base station, comprising:

means for transmitting, to a user equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

means for transmitting, to the UE, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules transmission of the PDSCH having the second DCI; and

means for scheduling an uplink or a downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
The apparatus of claim 51, wherein an order that the second DCI is associated with the layer of the transmission of the PDSCH having the second DCI comprises a first layer having the lowest DMRS port ID for a code word or a second layer having the second lowest DMRS port ID for the code word.
The apparatus of claim 52, wherein the second DCI is associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) .
The apparatus of claim 51, wherein an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.
The apparatus of claim 51, wherein the second DCI and the PDSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a base station, comprising:

means for transmitting, to a User Equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

means for transmitting, to the UE, a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

means for receiving, from the UE, an uplink transmission on the PUSCH based on the UCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The apparatus of claim 56, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The apparatus of claim 56, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The apparatus of claim 58, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The apparatus of claim 56, wherein the UCI is omitted if a UCI payload includes a large data code rate that exceeds the layers.
The apparatus of claim 56, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The apparatus of claim 56, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a base station, comprising:

a memory; and

at least one processor coupled to the memory and configured to:

transmit, to a user equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

transmit, to the UE, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules the transmission of the PDSCH having the second DCI; and

schedule an uplink or a downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
The apparatus of claim 63, wherein an order that the second DCI is associated with the layer of the transmission of the PDSCH having the second DCI comprises a first layer having the lowest DMRS port ID for a code word or a second layer having the second lowest DMRS port ID for the code word.
The apparatus of claim 64, wherein the second DCI is associated with a first code word if the PDSCH comprises two code words having the same modulation and coding scheme (MCS) .
The apparatus of claim 63, wherein an order of DMRS port IDs for the layer may be based on an order of a channel quality of the layers.
The apparatus of claim 63, wherein the second DCI and the PDSCH are transmitted concurrently on different layers.
An apparatus for wireless communication at a base station, comprising:

a memory; and

at least one processor coupled to the memory and configured to:

transmit, to a User Equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

transmit, to the UE, a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for transmission of the UCI; and

receive, from the UE, an uplink transmission on the PUSCH based on the UCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.
The apparatus of claim 68, wherein if the code word comprises more than one PTRS port, the UCI is associated with the more than one PTRS port based on a frequency and time order.
The apparatus of claim 68, wherein if the code word comprises more than one code word, the UCI is associated with the code word having a higher modulation coding scheme (MCS) .
The apparatus of claim 70, wherein the code word comprises more than one code word, and the UCI is associated with a first code word of the more than one code word if each of the more than one code word have the same MCS.
The apparatus of claim 68, wherein the UCI is omitted if a UCI payload includes a large data code rate that exceeds the layers.
The apparatus of claim 68, wherein the UCI is associated with different layers of the PUSCH if the PRTS is associated with different layers in different repetitions of the PUSCH transmissions.
The apparatus of claim 68, wherein the UCI and the PUSCH are transmitted concurrently on different layers.
A computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:

transmit, to a user equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) ;

transmit, to the UE, a second DCI on a physical downlink shared channel (PDSCH) , wherein the first DCI schedules the transmission of the PDSCH having the second DCI; and

schedule an uplink or a downlink transmission based on the second DCI, wherein the second DCI is associated with a layer of the PDSCH having the second DCI having a lowest demodulation reference signal (DMRS) port identifier (ID) .
A computer-readable medium storing computer executable code, the code when executed by a processor cause the processor to:

transmit, to a User Equipment (UE) , a first downlink control information (DCI) on a physical downlink control channel (PDCCH) , wherein the first DCI schedules an uplink control information (UCI) ;

transmit, to the UE, a second DCI on a subsequent PDCCH, wherein the second DCI schedules a physical uplink shared channel (PUSCH) for the transmission of the UCI; and

receive, from the UE, an uplink transmission on the PUSCH based on the UCI, wherein the UCI is associated with a layer of the PUSCH associated with a phase tracking reference signal (PTRS) port in a code word of the PUSCH.