Demodulation reference signal sharing mode selection in wireless communication systems

Abstract

Wireless communication techniques utilizing a DMRS sharing mode are disclosed. A method of wireless communication includes: receiving control information by a user equipment (UE) device. The control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing modes. The method also includes transmitting an uplink transmission to a base station according to the DMRS sharing mode. The DMRS sharing mode is selected from one or more DMRS sharing modes based on one or more parameters of the uplink transmission. Other aspects and features are also claimed and described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Patent Application No. 17 / 210,133, filed on March 23, 2021, entitled “DEMODULATION REFERENCE SIGNAL SHARING MODE SELECTION IN A WIRELESS COMMUNICATION SYSTEM,” and U.S. Patent Application No. 62 / 994,531, filed on March 25, 2020, entitled “DEMODULATION REFERENCE SIGNAL SHARING MODE SELECTION IN A WIRELESS COMMUNICATION SYSTEM,” each of which is incorporated herein by reference in its entirety. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly, to demodulation reference signal sharing mode selection in wireless communication systems. Background Art

[0004] Wireless communication networks are widely deployed to provide various communication services, such as voice, video, packet data, messaging, broadcast, etc. These wireless networks may be multiple-access networks capable of supporting multiple users by sharing the available network resources. Such networks, which are typically multiple-access networks, support communication for multiple users by sharing the available network resources.

[0005] A wireless communication network may include multiple base stations or Node Bs that can support communication for multiple user equipments (UEs). A UE may communicate with a base station via a downlink and an uplink. A downlink (or forward link) refers to a communication link from a base station to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a base station.

[0006] The base station may send data and control information to the UE on the downlink, and / or may receive data and control information from the UE on the uplink. On the downlink, the transmission from the base station may encounter interference due to transmissions from neighboring base stations or other wireless radio frequency (RF) transmitters. On the uplink, the transmission from the UE may encounter interference from uplink transmissions of other UEs communicating with neighboring base stations or from other wireless RF transmitters. This interference can reduce performance on both the downlink and uplink.

[0007] As the demand for mobile broadband access continues to increase, the potential for interference and congested networks increases as more UEs access long-range wireless communication networks and more short-range wireless systems are deployed in communities. Research and development continue to drive the development of wireless technologies, not only to meet the growing demand for mobile broadband access, but also to improve and enhance the user experience of mobile communications. Summary of the invention

[0008] In one aspect of the present disclosure, a method of wireless communication includes: receiving, by a user equipment (UE) device, one or more configuration messages including control information. The control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns. The method also includes determining a DMRS sharing pattern for an uplink transmission from the DMRS sharing patterns indicated by the control information based on the one or more parameters of the uplink transmission. The method also includes transmitting an uplink transmission to a base station according to the DMRS sharing pattern.

[0009] In another aspect of the present disclosure, a method of wireless communication includes: transmitting, by a base station, one or more configuration messages including control information to a UE device. The control information indicates a mapping of an uplink transmission parameter to a DMRS sharing pattern. The method also includes determining a DMRS sharing pattern for an uplink transmission from the DMRS sharing pattern indicated by the control information based on one or more parameters of the uplink transmission. The method also includes receiving an uplink transmission from the UE device according to the DMRS sharing pattern.

[0010] In another aspect of the present disclosure, a device configured for wireless communication includes: a memory and one or more processors coupled to the memory. The one or more processors are configured to receive one or more configuration messages including control information at a UE device. The control information indicates a mapping of uplink transmission parameters to a DMRS sharing mode. The one or more processors are also configured to determine a DMRS sharing mode for uplink transmission from the DMRS sharing mode indicated by the control information based on one or more parameters of the uplink transmission. The one or more processors are also configured to initiate transmission of an uplink transmission to a base station according to the DMRS sharing mode.

[0011] In another aspect of the present disclosure, a device configured for wireless communication includes: a memory and one or more processors coupled to the memory. The one or more processors are configured to initiate the transmission of one or more configuration messages including control information from a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to a DMRS sharing mode. The one or more processors are also configured to determine a DMRS sharing mode for uplink transmission from the DMRS sharing mode indicated by the control information based on one or more parameters of the uplink transmission. The one or more processors are also configured to receive an uplink transmission from the UE device according to the DMRS sharing mode.

[0012] In another aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations. The operations include receiving, by a UE device, one or more configuration messages including control information. The control information indicates a mapping of uplink transmission parameters to DMRS sharing patterns. The operations also include determining a DMRS sharing pattern for uplink transmission from the DMRS sharing patterns indicated by the control information based on one or more parameters of the uplink transmission. The operations also include transmitting an uplink transmission to a base station according to the DMRS sharing pattern.

[0013] In another aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations. The operations include transmitting one or more configuration messages including control information to a UE device by a base station. The control information indicates a mapping of uplink transmission parameters to a DMRS sharing pattern. The operations also include determining a DMRS sharing pattern for uplink transmission from the DMRS sharing patterns indicated by the control information based on one or more parameters of the uplink transmission. The operations also include receiving an uplink transmission from the UE device according to the DMRS sharing pattern.

[0014] In another aspect of the present disclosure, a device for wireless communication includes a component for storing instructions. The device also includes a component for executing instructions to receive one or more configuration messages including control information at a UE device. The control information indicates a mapping of uplink transmission parameters to DMRS sharing patterns. The component for executing instructions is configured to determine a DMRS sharing pattern for uplink transmission from the DMRS sharing patterns indicated by the control information based on one or more parameters of the uplink transmission. The component for executing instructions is configured to initiate transmission of uplink transmission to a base station according to the DMRS sharing pattern.

[0015] In another aspect of the present disclosure, a device for wireless communication includes a component for storing instructions. The device also includes a component for executing instructions to initiate the transmission of one or more configuration messages including control information from a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to a DMRS sharing pattern. The component for executing instructions is configured to determine a DMRS sharing pattern for uplink transmission from the DMRS sharing pattern indicated by the control information based on one or more parameters of the uplink transmission. The component for executing instructions is configured to receive an uplink transmission from a UE device according to the DMRS sharing pattern.

[0016] In another aspect of the present disclosure, a method of wireless communication includes receiving control information by a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. The method also includes transmitting an uplink transmission to a base station based on the DMRS sharing pattern. Based on one or more parameters of the uplink transmission, a DMRS sharing pattern is selected from one or more DMRS sharing patterns.

[0017] In another aspect of the present disclosure, a method of wireless communication includes transmitting control information by a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. The method also includes receiving an uplink transmission from the UE device according to the DMRS sharing pattern. Based on one or more parameters of the uplink transmission, a DMRS sharing pattern is selected from the one or more DMRS sharing patterns.

[0018] In another aspect of the present disclosure, a device for wireless communication includes a memory and one or more processors coupled to the memory. The one or more processors are configured to receive control information at a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. The one or more processors are also configured to initiate transmission of uplink transmission to a base station based on the DMRS sharing pattern. Based on one or more parameters of the uplink transmission, a DMRS sharing pattern is selected from one or more DMRS sharing patterns.

[0019] In another aspect of the present disclosure, a device for wireless communication includes a memory and one or more processors coupled to the memory. The one or more processors are configured to initiate the transmission of control information from a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing modes. The one or more processors are also configured to receive an uplink transmission from the UE device according to the DMRS sharing mode. Based on one or more parameters of the uplink transmission, a DMRS sharing mode is selected from one or more DMRS sharing modes.

[0020] In another aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations. The operations include receiving control information by a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing modes. The operations also include transmitting an uplink transmission to a base station based on the DMRS sharing mode. Based on one or more parameters of the uplink transmission, a DMRS sharing mode is selected from one or more DMRS sharing modes.

[0021] In another aspect of the present disclosure, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations. The operations include transmitting control information from a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing modes. The operations also include receiving an uplink transmission from a UE device according to the DMRS sharing mode. Based on one or more parameters of the uplink transmission, a DMRS sharing mode is selected from one or more DMRS sharing modes.

[0022] In another aspect of the present disclosure, a device for wireless communication includes a component for storing instructions. The device also includes a component for executing instructions to receive control information at a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. The component for executing instructions is configured to transmit an uplink transmission to a base station based on the DMRS sharing pattern. Based on one or more parameters of the uplink transmission, a DMRS sharing pattern is selected from one or more DMRS sharing patterns.

[0023] In another aspect of the present disclosure, a device for wireless communication includes a component for storing instructions. The device also includes a component for executing instructions to initiate the transmission of control information from a base station to a UE device. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing modes. The component for executing instructions is configured to receive an uplink transmission from the UE device according to the DMRS sharing mode. Based on one or more parameters of the uplink transmission, a DMRS sharing mode is selected from one or more DMRS sharing modes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] A further understanding of the nature and advantages of the present disclosure may be achieved by reference to the following drawings. In the drawings, similar components or features may have the same reference numerals. In addition, various components of the same type may be distinguished by adding a dash and a second reference numeral after the reference numeral, the second reference numeral being used to distinguish similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, regardless of the second reference numeral.

[0025] Figure 1 is a block diagram illustrating an example of a wireless communication system configured to perform demodulation reference signal (DMRS) sharing mode selection in accordance with some aspects of the present disclosure.

[0026] Figure 2 is a block diagram illustrating an example of a base station and a UE configured to perform DMRS sharing mode selection according to some aspects of the present disclosure.

[0027] Figure 3is a block diagram of an example of a wireless communication system configured to perform DMRS sharing mode selection according to some aspects of the present disclosure.

[0028] Figure 4 is a block diagram illustrating an example of a DMRS sharing pattern for uplink transmissions according to some aspects of the present disclosure.

[0029] Figure 5 is a block diagram illustrating additional examples of DMRS sharing patterns for uplink transmissions according to some aspects of the present disclosure.

[0030] Figure 6 is a block diagram illustrating aspects of an example of a puncture event according to some aspects of the present disclosure.

[0031] Figure 7 is a flow chart of an example of a method of wireless communication according to some aspects of the present disclosure.

[0032] Figure 8 is a flow chart of another example of a wireless communication method according to some aspects of the present disclosure.

[0033] Fig. 9 is a block diagram conceptually illustrating an example of a UE configured to perform DMRS sharing mode selection according to some aspects of the present disclosure.

[0034] Fig.10 is a block diagram illustrating an example of a design of a base station configured to perform DMRS sharing pattern selection in accordance with some aspects of the present disclosure. DETAILED DESCRIPTION

[0035] In some aspects of the present disclosure, one or more devices of a wireless communication system are configured to determine a demodulation reference signal (DMRS) sharing mode. Some deployments may be used for uplink transmissions based on one or more parameters of the uplink transmission. The uplink transmission may include repetitions with DMRS. The uplink transmission may also include repetitions that do not include DMRS (e.g., repetitions that "share" DMRS with one or more other repetitions). The DMRS sharing mode may indicate an order of repetitions that include DMRS and repetitions that do not include DMRS. Additional or alternative aspects include various designs of different DMRS patterns to support DMRS sharing (e.g., when PUSCH repetition is enabled).

[0036] One or more aspects of the present disclosure may improve the efficiency or performance of a wireless communication system. For example, by determining a DMRS sharing pattern for an uplink transmission based on one or more parameters of the uplink transmission, a DMRS sharing pattern may be "customized" or "tailored" for one or more specific uplink transmissions. As a result, uplink transmissions of different parameters may be associated with different DMRS sharing patterns, which may improve efficiency or performance in some cases compared to certain other techniques (e.g., a common DMRS sharing pattern for uplink transmissions of different parameters).

[0037] The detailed description in conjunction with the accompanying drawings is intended to describe various aspects and is not intended to limit the scope of the present disclosure. Instead, the detailed description includes specific details for the purpose of providing an understanding of the subject matter of the present disclosure. It will be apparent to those skilled in the art that certain details are not required in every case, and in some cases, well-known structures and components are shown in block diagram form for clarity of presentation.

[0038] Aspects of the present disclosure may be used in wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth generation (5G) or new radio (NR) networks (sometimes referred to as "5G NR" networks / systems / devices), and other communication networks. As described herein, the terms "network" and "system" may be used interchangeably.

[0039] For example, a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband-CDMA (W-CDMA) and Low Chip Rate (LCR). CDMA2000 covers IS-2000, IS-95 and IS-856 standards.

[0040] TDMA networks can implement radio technologies such as GSM, for example. 3GPP defines standards for GSM EDGE (Enhanced Data Rates for GSM Evolution) radio access networks (RANs), also known as GERANs. GERANs are radio components of GSM / EDGE, and networks that connect base stations (e.g., Ater and Abis interfaces) and base station controllers (A interfaces, etc.). The radio access network represents a component of the GSM network, through which telephone calls and packet data are routed from the public switched telephone network (PSTN) and the Internet to subscriber phones, or from subscriber phones to the public switched telephone network and the Internet, and subscriber phones are also known as user terminals or user equipment (UEs). The network of a mobile phone operator may include one or more GERANs, which may be coupled to a universal terrestrial radio access network (UTRAN) in the case of a UMTS / GSM network. The operator network may also include one or more LTE networks and / or one or more other networks. Various network types may use different radio access technologies (RAYs) and radio access networks (RANs).

[0041] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), IEEE802.11, IEEE802.16, IEEE 802.20, flash-OFDM, etc. UTRA, E-UTRA, and Global System for Mobile Communications (GSM) are part of Universal Mobile Telecommunications System (UMTS). In particular, Long Term Evolution (LTE) is a version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), and cdma2000 is described in documents provided by an organization named "3rd Generation Partnership Project 2" (3GPP 2). These different radio technologies and standards are known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between telecommunications association groups to define a globally applicable third generation (3G) mobile phone specification. 3GPP Long Term Evolution (LTE) is a 3GPP project that aims to improve the Universal Mobile Telecommunications System (UMTS) mobile phone standard. 3GPP may define specifications for next generation mobile networks, mobile systems, and mobile devices. The present disclosure relates to the evolution of wireless technology from LTE, 4G, 5G, NR, etc., using a set of new and different radio access technologies or radio air interfaces, with shared access to the wireless spectrum between networks.

[0042] 5G networks consider different deployments, different spectrums, and different services and devices that can be implemented using a unified air interface based on OFDM. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5G NR will be able to scale to provide coverage for (1) massive Internet of Things (IoTs) with ultra-high density (e.g., ~1M nodes / km2), ultra-low complexity (e.g., ~tens of bits / second), ultra-low energy (e.g., ~10+ years of battery life), and deep coverage to reach challenging locations; (2) including mission-critical control with strong security to protect sensitive personal, financial, or classified information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1ms), and users with a wide range of mobility or lack of mobility; and (3) with enhanced mobile broadband, including extremely high capacity (e.g., ~10 terabits per second / km2), extremely high data rates (e.g., multi-Gigabit per second rates, 100+ Mbps user experience rates), and deep awareness for advanced discovery and optimization.

[0043] 5G NR devices, networks, and systems can use OFDM-based waveform features. These features can include scalable numerology and transmission time intervals (TTIs); a general, flexible framework that effectively multiplexes services and features through dynamic, low-latency time division duplex (TDD) / frequency division duplex (FDD) designs; and advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust millimeter wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of the numerology in 5GNR, as well as the scaling of subcarrier spacing, can effectively solve the problem of operating different services across different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD / TDD implementations, the subcarrier spacing may appear at 15kHz, such as on bandwidths of 1, 5, 10, 20MHz, etc. For various other outdoor and small cell coverage deployments with TDD greater than 3GHz, the subcarrier spacing on 80 / 100MHz bandwidth may appear at 30kHz. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5 GHz band, subcarrier spacing may occur at 60 kHz over a 160 MHz bandwidth. Finally, for various deployments transmitting with millimeter wave components at 28 GHz TDD, subcarrier spacing may occur at 120 kHz over a 500 MHz bandwidth.

[0044] 5G NR's scalable parameter set facilitates scalable TTI for different latency and quality of service (QoS) parameters. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to start on symbol boundaries. 5G NR also considers a self-contained integrated subframe design with uplink / downlink scheduling information, data, and acknowledgment in the same subframe. The independent integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink / downlink, which can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current business needs.

[0045] For clarity, certain aspects of the apparatus and techniques may be described below with reference to exemplary LTE implementations or in an LTE-centric manner, and LTE terminology may be used as an illustrative example in portions of the following description; however, the description is not intended to be limited to LTE applications. In fact, the present disclosure relates to wireless spectrum shared access between networks using different radio access technologies or radio air interfaces (e.g., 5G NR).

[0046] Furthermore, it should be understood that in operation, a wireless communication network adapted according to the concepts herein may operate with any combination of licensed or unlicensed spectrum depending on load and availability. Therefore, it will be apparent to those skilled in the art that the systems, devices, and methods described herein may be applied to other communication systems and applications besides the specific examples provided.

[0047] Although various aspects are described in this application by the description of some examples, it will be understood by those skilled in the art that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementations and / or uses can be implemented via integrated circuits and / or other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical devices, AI-enabled devices, etc.). Although some examples may or may not be specifically targeted at use cases or applications, a variety of applicability of the described innovations may occur. The scope of implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or OEM devices or systems incorporating one or more of the described aspects. In some practical settings, the devices incorporating the described aspects and features may also include additional components and features. The innovations described herein can be practiced in a variety of implementations, including both large / small devices of different sizes, shapes, and structures, chip-level components, multi-component systems (e.g., RF chains, communication interfaces, or processors), distributed arrangements, end-user devices, etc.

[0048] Figure 1 A wireless network 100 for communication according to some aspects is shown. The wireless network 100 may, for example, include a 5G wireless network. As will be appreciated by those skilled in the art, Figure 1 The components appearing in may have related counterparts in other network arrangements, including, for example, cellular network arrangements and non-cellular network arrangements (e.g., device-to-device or point-to-point or ad hoc network arrangements, etc.).

[0049] Figure 1The wireless network 100 shown includes multiple base stations 105 and other network entities. A base station may be a station that communicates with a UE, and may also be referred to as an evolved Node B (eNB), a next generation eNB (gNB), an access point, etc. Each base station 105 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a specific geographic coverage area of ​​a base station and / or a base station subsystem serving the coverage area, depending on the context in which the term is used. In an embodiment of the wireless network 100 herein, the base station 105 may be associated with the same operator or different operators (e.g., the wireless network 100 may include multiple operator wireless networks), and may provide wireless communications using one or more frequencies (e.g., one or more frequency bands in a licensed spectrum, an unlicensed spectrum, or a combination thereof) that are the same as those of an adjacent cell. In some examples, a single base station 105 or UE 115 may be operated by more than one network operating entity. In other examples, each base station 105 and UE 115 may be operated by a single network operating entity.

[0050] A base station may provide communication coverage for a macro cell or a small cell (such as a pico cell or a femto cell) and / or other types of cells. A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs that have subscribed to services with a network provider. A small cell, such as a pico cell, typically covers a relatively small geographic area and may allow unrestricted access to UEs that have subscribed to services with a network provider. A small cell, such as a femto cell, also typically covers a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs of users in a home, etc.). A base station for a macro cell may be referred to as a macro base station. A base station for a small cell may be referred to as a small cell base station, a pico base station, a femto base station, or a home base station. In Figure 1 In the example shown, base stations 105d and 105e are conventional macro base stations, while base stations 105a-105c are macro base stations that support one of three-dimensional (3D), full-dimensional (FD), or massive MIMO. Base stations 105a-105c utilize their higher-dimensional MIMO capabilities to increase coverage and capacity by utilizing 3D beamforming in both elevation and azimuth beamforming. Base station 105f is a small cell base station, which can be a home node or a portable access point. The base station can support one or more (e.g., two, three, four, etc.) cells.

[0051] Wireless network 100 may support synchronous or asynchronous operation. For synchronous operation, base stations may have similar frame timing, and transmissions from different base stations may be approximately aligned in time. For asynchronous operation, base stations may have different frame timing, and transmissions from different base stations may not be aligned in time. In some cases, the network may be enabled or configured to handle dynamic switching between synchronous or asynchronous operation.

[0052] UE 115 is dispersed throughout the wireless network 100, and each UE may be fixed or mobile. It should be understood that, although in the standards and specifications promulgated by the Third Generation Partnership Project (3GPP), mobile devices are generally referred to as user equipment (UE), those skilled in the art may also refer to such devices as mobile stations (MS), subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals (AT), mobile terminals, wireless terminals, remote terminals, mobile phones, terminals, user agents, mobile clients, clients, gaming devices, augmented reality devices, vehicle component devices / modules, or some other suitable terms. In this document, a "mobile" device or UE does not necessarily need to have the ability to move, and may be stationary. Some non-limiting examples of mobile devices include mobile phones, cellular phones, smart phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, laptops, personal computers (PCs), notebooks, netbooks, smartbooks, tablet computers, and personal digital assistants (PDAs). The mobile device may additionally be an "Internet of Things" (IoT) or "Internet of Everything" (IoE) device, such as a car or other vehicle, a satellite radio, a global positioning system (GPS) device, a logistics controller, a drone, a multicopter, a quadcopter, a smart energy or security device, a solar panel or solar array, municipal lighting, water or other infrastructure; industrial automation and enterprise devices; consumer and wearable devices, such as glasses, wearable cameras, smart watches, health or fitness trackers, mammal implantable devices, gesture tracking devices, medical devices, digital audio players (e.g., MP3 players), cameras, game consoles, etc.; and digital home or smart home devices, such as home audio, video and multimedia devices, appliances, sensors, vending machines, smart lighting, home security systems, smart meters, etc. In one aspect, a UE may be a device that includes a universal integrated circuit card (UICC). In another aspect, a UE may be a device that does not include a UICC. In some aspects, a UE that does not include a UICC may also be referred to as an IoE device. Figure 1The UEs 115a-115d are examples of mobile smartphone-type devices accessing the wireless network 100. The UE may also be a machine specifically configured for connected communications, including machine type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc. Figure 1 The illustrated UEs 115e - 115k are examples of various machines configured for communications accessing the wireless network 100 .

[0053] A mobile device such as UE 115 is able to communicate with any type of base station, whether macro, pico, femto, relay, etc. Figure 1 In the present invention, lightning (e.g., communication link) indicates wireless transmission between a UE and a serving base station that is a base station designated to serve the UE on a downlink and / or uplink, or a desired transmission between base stations, and backhaul transmission between base stations. In some cases, a UE may operate as a base station or other network node. Backhaul communications between base stations of the wireless network 100 may be performed using wired and / or wireless communication links.

[0054] In operation of the wireless network 100, base stations 105a-105c use 3D beamforming and cooperative spatial techniques (such as coordinated multi-point (CoMP) or multi-connectivity) to serve UEs 115a and 115b. Macro base station 105d performs backhaul communications with base stations 105a-105c and small cell base station 105f. Macro base station 105d also transmits multicast services that are subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as yellow alerts or gray alerts.

[0055] The wireless network 100 can support communication with ultra-reliable and redundant links for mission-critical devices (e.g., UE 115e as a drone). The redundant communication links with UE 115e include links from macro base stations 105d and 105e and small cell base station 105f. Other machine-type devices such as UE 115f (thermometer), UE 115g (smart meter), and UE 115h (wearable device) can communicate directly with base stations such as small cell base station 105f and macro base station 105e through the wireless network 100, or communicate in a multi-hop configuration by communicating with another user equipment that relays its information to the network, such as UE 115f communicating temperature measurement information to smart meter UE 115g, which is then reported to the network through small cell base station 105f. The wireless network 100 may also provide additional network efficiency through dynamic, low-latency TDD / FDD communications, such as in a vehicle-to-vehicle (V2V) mesh network between UEs 115 1 - 115 k communicating with a macro base station 105 e .

[0056] Figure 2 A block diagram showing a design of a base station 105 and a UE 115 is shown, and the base station 105 and the UE 115 may be Figure 1 For the restricted association scenario (described above), the base station 105 can be Figure 1 The small cell base station 105f in the example, and the UE 115 may be a UE 115c or 115D operating in the service area of ​​the base station 105f, which will be included in the accessible UE list of the small cell base station 105f in order to access the small cell base station 105f. The base station 105 may also be some other type of base station. Figure 2 As shown, the base station 105 may be equipped with antennas 234a through 234t, and the UE 115 may be equipped with antennas 252a through 252r, to facilitate wireless communications.

[0057] At the base station 105, the transmit processor 220 may receive data from the data source 212 and control information from the controller / processor 240. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ (automatic repeat request) indicator channel (PHICH), a physical downlink control channel (PDCCH), an enhanced physical downlink control channel (EPDCCH), an MTC physical downlink control channel (MPDCCH), etc. The data may be for a PDSCH, etc. The transmit processor 220 may process (e.g., encode and symbol map) the data and the control information to obtain data symbols and control symbols, respectively. The transmit processor 220 may also generate reference symbols, e.g., for a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) and a cell-specific reference signal. If applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​the data symbols, control symbols, and / or reference symbols, and may provide output symbol streams to modulators (mod) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may additionally or alternatively process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 232a through 232t may be transmitted via antennas 234a through 234t, respectively.

[0058] At the UE 115, antennas 252a to 252r may receive downlink signals from the base station 105 and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 115 to a data sink 260, and provide decoded control information to a controller / processor 280.

[0059] On the uplink, at the UE 115, a transmit processor 264 may receive and process data from a data source 262 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 280 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for a reference signal. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, if applicable, further processed by modulators 254a through 254r (e.g., for SC-FDM, etc.), and transmitted to the base station 105. At the base station 105, the uplink signal from the UE 115 may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 115. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240.

[0060] The controllers / processors 240 and 280 may direct the operations at the base station 105 and the UE 115, respectively. The controller / processor 240 and / or other processors and modules at the base station 105 and / or the controller / processor 280 and / or other processors and modules at the UE 115 may perform or direct the execution of various processes for the techniques described herein, such as performing or directing Figure 7 and Figure 8 The operations shown in , and / or other processes of the techniques described herein. Memories 242 and 282 may store data and program codes for base station 105 and UE 115, respectively. Scheduler 244 may schedule UEs for data transmission on downlink and / or uplink.

[0061] Wireless communication systems operated by different network operating entities (e.g., network operators) may share spectrum. In some cases, a network operating entity may be configured to use the entire designated shared spectrum for at least a period of time before another network operating entity uses the entire designated shared spectrum at a different time period. Therefore, in order to allow network operating entities to use the entire designated shared spectrum and to mitigate interfering communications between different network operating entities, certain resources (e.g., time) may be divided and allocated to different network operating entities for certain types of communications.

[0062] For example, a network operating entity may be allocated certain time resources that are reserved by the network operating entity for dedicated communications using the entire shared spectrum. A network operating entity may also be allocated other time resources where the entity is given a higher priority than other network operating entities to communicate using the shared spectrum. These time resources prioritized for use by the network operating entity may be utilized on an opportunistic basis by other network operating entities if the prioritized network operating entity does not utilize these resources. Additional time resources may be allocated to any network operator for use on an opportunistic basis.

[0063] Access to the shared spectrum and arbitration of time resources between different network operating entities can be centrally controlled by a separate entity, autonomously determined by a predefined arbitration scheme, or dynamically determined based on interactions between the network operator's wireless nodes.

[0064] In some cases, UE 115 and base station 105 may operate in a shared radio spectrum band, which may include licensed or unlicensed (e.g., contention-based) spectrum. In the unlicensed frequency portion of the shared radio spectrum band, UE 115 or base station 105 may traditionally perform a media sensing process to compete for access to the spectrum. For example, UE 115 or base station 105 may perform a listen-before-talk (LBT) process, such as a clear channel assessment (CCA), before communicating to determine whether the shared channel is available. CCA may include an energy detection process to determine whether there are any other active transmissions. For example, a device may infer that a change in a received signal strength indicator (RSSI) of a power meter indicates that the channel is occupied. Specifically, a signal power concentrated in a certain bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. CCA may also include detection of a specific sequence indicating channel use. For example, another device may send a specific preamble before sending a data sequence. In some cases, the LBT process may include the wireless node adjusting its own backoff window based on the amount of energy detected on the channel and / or acknowledgement / negative acknowledgement (ACK / NACK) feedback for its own transmitted packets as a proxy for collisions.

[0065] refer to Figure 3 , an illustrative example of a wireless communication system is depicted and generally designated 300. The wireless communication system 300 includes a base station 105 and a UE 115. Although Figure 3 The example shows a single base station 105 and a single UE 115, but in other examples, the wireless communication system 300 may include multiple base stations 105, multiple UEs 115, one or more other devices, or a combination thereof.

[0066] During operation, the UE 115 may receive the control information 302. For example, the base station 105 may transmit the control information 302 to the UE 115 via one or more configuration messages 320. The UE 115 may store the control information 302, such as in the memory 282.

[0067] The base station 105 may schedule uplink transmissions 332 for the UE 115. For example, the base station 105 may transmit a scheduling message 324 to the UE 115 to schedule the uplink transmissions 332. The uplink transmissions 332 include multiple repetitions 334 of the same uplink channel, such as a physical uplink shared channel (PUSCH). In an example, the uplink transmissions 332 correspond to a single PUSCH transmission, where the repetitions 334 span multiple symbols in one or more time slots.

[0068] For example, in some wireless communication data protocols, data may be first sent and then resent one or more times to increase the reliability of the data. As used herein, "repetition" may refer to the initial transmission of data and the retransmission of data. For illustration, data that is initially sent and then resent once may correspond to two repetitions. As another example, data that is initially sent and then resent three times may correspond to four repetitions.

[0069] The uplink transmission 332 also includes a DMRS 336. The base station 105 can be configured to demodulate one or more repetitions 334 of the uplink transmission 332 based on the DMRS 336. In some examples, the DMRS 336 is associated with a DMRS sharing pattern 310. In this case, the DMRS 336 can be "shared" in multiple repetitions 334 based on the DMRS sharing pattern 310 (e.g., the base station 105 uses the repetitions 334 including the DMRS 336 to demodulate the repetitions 334 that do not include the DMRS 336). In general, the sharing pattern involves how to share one or more DMRSs between various transmissions (e.g., for demodulation of data resource elements of a transmission that may or may not include a DMRS, and uses the DMRS of another transmission). According to the DMRS sharing pattern, one or more DMRSs can be sent within the physical resources of one or more first uplink transmissions or repetitions of an uplink channel, which are used to demodulate data of other uplink transmissions or repetitions of the uplink channel. In some specific instances, a "DMRS sharing pattern" (such as DMRS sharing pattern 310) may indicate an ordering of one or more uplink repetitions of an uplink channel that includes a DMRS, while a set of one or more other repetitions of the uplink channel may not have a DMRS. In one or more repetitions that do not include a DMRS, demodulation may use the DMRS of the one or more repetitions that include the DMRS. Additionally or alternatively, the DMRS sharing pattern may indicate one or more other uplink repetitions of an uplink channel that do not include a DMRS and will be demodulated based on the DMRS of other uplink transmissions, which may be earlier or later in time than the uplink channel that does not include a DMRS. The sharing pattern may be static or dynamic. In some cases, the sharing pattern may evolve during communication operations. The sharing pattern may be pre-provided or determined during operation based on the desired system operation. The sharing pattern may be stored in a memory of the communication device.

[0070] In some aspects of the present disclosure, one or both of the base station 105 and the UE 115 are configured to determine the DMRS sharing pattern 310 based on one or more parameters 308 of the uplink transmission 332. For illustration, the control information 302 may indicate a mapping of the uplink transmission parameters 304 to the DMRS sharing pattern 306. Figure 3 In the example of , uplink transmission parameters 304 include one or more parameters 308 , and DMRS sharing pattern 306 includes DMRS sharing pattern 310 .

[0071] In some implementations, the base station 105 may provide an indication of the DMRS sharing mode 310 to the UE 115. For example, the base station 105 may be configured to transmit a DMRS sharing configuration parameter 328 indicating the DMRS sharing mode 310 to the UE 115. As illustrative examples, the DMRS sharing configuration parameter 328 may be indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling. In some other examples, the UE 115 is configured to dynamically determine the DMRS sharing configuration parameter 328.

[0072] To further illustrate, in some examples, the base station 105 and the UE 115 are configured to determine the DMRS sharing pattern 310 by identifying one or more parameters 308 of the uplink transmission and by using the one or more parameters 308 as a lookup to the control information 302 to identify the DMRS sharing pattern 310. In this example, the UE 115 is configured to transmit the uplink transmission 332 to the base station 105 in accordance with the DMRS sharing pattern 310, and the base station 105 is configured to receive (e.g., demodulate) the uplink transmission 332 in accordance with the DMRS sharing pattern 310. Thus, the control information 302 can enable the base station 105 and the UE 115 to "agree" on a particular DMRS sharing pattern 310 for transmitting and receiving the uplink transmission 332 (e.g., without an explicit indication of the DMRS sharing pattern 310 via the DMRS sharing configuration parameter 328). In another example, the DMRS sharing configuration parameter 328 can be used as a lookup to the control information 302 to determine the DMRS sharing pattern 310.

[0073] In one example, the one or more parameters 308 include a configured number 326 of repetitions 334. In some implementations, the scheduling message 324 indicates the configured number 326. The configured number 326 may indicate a "maximum" or "nominal" number of repetitions for the uplink transmission 332 that may be reduced in certain circumstances.

[0074] Alternatively or additionally, one or more parameters 308 may include a DMRS sharing factor 330. As used herein, a DMRS sharing factor (such as DMRS sharing factor 330) may refer to a ratio of the total number of uplink repetitions of an uplink channel to the number of uplink repetitions of an uplink channel that does not include a DMRS. Thus, the DMRS sharing factor 330 may indicate the number of repetitions of the shared DMRS. In some examples, the base station 105 is configured to transmit an indication of the DMRS sharing factor 330 to the UE 115, and the UE 115 is configured to receive an indication of the DMRS sharing factor 330 from the base station 105.

[0075] To illustrate, Figure 4 Different examples 410, 420, 430, and 440 of uplink transmissions 332 are depicted. Figure 4 In the example, each instance 410, 420, 430 and 440 of the uplink transmission 332 includes eight repetitions 334 (in Figure 4 1, 2, 3, 4, 5, 6, 7 and 8). In addition, Figure 4 , time can advance to the right (e.g., where repeat 1 is sent before repeat 2, and repeat 2 is sent before repeat 3, and so on).

[0076] Example 410 depicts a DMRS sharing pattern 310 with two repetitions of DMRS 336, four repetitions without DMRS, and two additional repetitions of DMRS. In some implementations according to example 410, the base station 105 may be configured to demodulate repetition 1 using the DMRS of repetition 1, demodulate repetition 2 using the DMRS of repetition 2, and demodulate repetitions 3-6 using one or both of the DMRS of repetitions 1 and 2.

[0077] Example 420 depicts a DMRS sharing pattern 310 that alternates repetitions of DMRS and repetitions without DMRS. In some implementations according to example 420, base station 105 may be configured to demodulate repetition 1 using the DMRS of repetition 1, demodulate repetition 2 using the DMRS of repetition 1, demodulate repetition 3 using the DMRS of repetition 3, and demodulate repetition 2 using the DMRS of repetition 3, and so on.

[0078] In addition, in some examples, the DMRS sharing pattern can be repeated from the first set of repetitions 334 to the second set of repetitions 334. Repeating the DMRS sharing pattern can reduce the amount of information (e.g., bits) of the control information 302. To illustrate, in example 420, the two repeated patterns 422 can be repeated four times across the repetitions 334. In this example, the DMRS sharing pattern 310 can be based on a number of repetitions (e.g., two) that is less than the configured number 326 (e.g., eight), and the DMRS sharing pattern 310 can be repeated across the configured number 326 of repetitions 334 of the uplink transmission 332.

[0079] Example 430 illustrates further aspects of the DMRS sharing pattern 310. In example 430, repetition 1 includes a DMRS that can be used to demodulate repetitions 1-3.

[0080] Figure 4It is shown that a particular number of repetitions of uplink transmission 332 may be associated with different values ​​of DMRS sharing factor 330. To illustrate, in each of examples 410, 420, and 430, DMRS sharing factor 330 corresponds to 4, while in example 440, DMRS sharing factor 330 corresponds to 2.

[0081] Figure 4 It is also shown that a particular DMRS sharing factor 330 and a particular configured number of repetitions 326 can be associated with multiple different DMRS sharing patterns. For illustration, for a particular DMRS sharing factor 330 (2) and a particular configured number of repetitions 326 (8), examples 410, 420, and 430 correspond to different DMRS sharing patterns. In some examples, one or both of the base station 105 or the UE 115 are configured to select the DMRS sharing pattern 310 from a plurality of DMRS sharing patterns, such as the plurality of DMRS sharing patterns of examples 410, 420, and 430. The UE 115 can be configured to dynamically select the DMRS sharing pattern 310 from a plurality of DMRS sharing patterns, such as the plurality of DMRS sharing patterns of examples 410, 420, and 430.

[0082] Figure 5 Additional examples 510, 520, 530, and 540 of uplink transmissions 332 are shown. Figure 5 In the example, each instance 510, 520, 530 and 540 of the uplink transmission 332 includes four repetitions 334 (in Figure 4 In the figure, it is shown as repetition 1, 2, 3 and 4). In addition, Figure 5 , time may advance to the right (e.g., where repetition 1 is sent before repetition 2, and repetition 2 is sent before repetition 3, etc.). Examples 510, 520, 530, 540 illustrate different DMRS sharing patterns 310 for a particular DMRS sharing factor 330(2) and a particular number of configurations 326(4).

[0083] Reference again Figure 3, the one or more parameters 308 may include an actual number 350 of repetitions 334 that is less than the configured number 326. To illustrate, in some cases, a puncturing event may occur (e.g., after the uplink transmission 332 is scheduled via the scheduling message 324). The puncturing event may be associated with a modification of the uplink transmission 332 from the configured number 326 of repetitions to the actual number 350 of repetitions. As a non-limiting illustrative example, if the configured number 326 of repetitions 334 is 8, and the puncturing event cancels two of the repetitions 334, then the actual number 350 of repetitions 334 corresponds to 6. As another non-limiting illustrative example, if the configured number 326 of repetitions 334 is 8, and the puncturing event cancels one of the repetitions 334, then the actual number 350 of repetitions 334 corresponds to 7.

[0084] To further illustrate, Figure 6 A puncturing event is shown associated with an example 410 of an uplink transmission 332. The puncturing event is associated with a modification of the uplink transmission 332 from a configured number 326 of repetitions 334 to an actual number 350 of repetitions 334 that is less than the configured number 326. For illustration, the configured number 326 may correspond to 8, while the actual number 350 may correspond to 6 (if two repetitions are eliminated) or 7 (if one repetition is eliminated).

[0085] In example 610, UE 115 is configured to apply the same DMRS sharing pattern to the remaining repetitions (e.g., regardless of the actual number 350) of uplink transmission 332. For example, after repetitions 3 and 8 are cancelled, the other repetitions remain "as is" in uplink transmission 332 (compared to example 410).

[0086] In example 620, the UE 115 is configured to re-determine the DMRS sharing pattern 310 based on the actual number 350 and in response to detecting the cancelled repetition of the uplink transmission. To illustrate, before detecting the puncturing event, the UE 115 may select the DMRS sharing pattern 310 associated with the configured number 326 of 8 (such as the DMRS sharing pattern 310 depicted in example 410). The UE 115 may send (or prepare to send) repetitions 1 and 2 based on the DMRS sharing pattern associated with the configured number 326 of 8.

[0087] In some cases, the UE 115 may detect a puncturing event associated with the cancellation of repetition 3. Upon detecting the cancellation of repetition 3, the UE 115 may determine that five repetitions 622 of the uplink transmission 332 remain after the cancelled repetition 3. The UE 115 may be configured to access the control information 302 to redetermine the DMRS sharing pattern 310 by identifying the DMRS sharing pattern associated with the actual number 350 of 5. The UE 115 may be configured to apply the redetermined DMRS sharing pattern 310 to the remaining repetitions 622 of the uplink transmission 332.

[0088] Reference again Figure 3 In some examples, the one or more parameters 308 include a number 354 of configured DMRS symbols 338 for each repetition 334 of the uplink transmission 332. In some implementations, the base station 105 may indicate the configured number to the UE 115, such as via a scheduling message 324. The configured number 354 may indicate a “maximum” or “nominal” number of DMRS symbols 338 for each repetition 334 of the uplink transmission 332, which may be reduced in certain circumstances (e.g., based on a symbol reduction event).

[0089] In some examples, the number of DMRS sharing patterns 306 available for uplink transmission 332 indicated by control information 302 is based on configured number 354. To illustrate, in some examples, control information 302 may include one number of DMRS sharing patterns 306 for a first value of configured number 354, and may include another number of DMRS sharing patterns 306 for a second value of configured number 354. As illustrative, non-limiting examples, if configured number 354 indicates a maximum of one DMRS symbol 338 per repetition 334 or a maximum of two DMRS symbols 338 per repetition 334, control information 302 may indicate four DMRS sharing patterns 306 or eight DMRS sharing patterns 306, respectively.

[0090] Alternatively or additionally, the DMRS sharing factor 330 for the uplink transmission 332 (or a set of DMRS sharing factors 330 that may be used for the uplink transmission 332) may be based on the configured number 354. As an illustrative, non-limiting example, if the configured number 354 indicates a maximum of one DMRS symbol 338 per repetition 334 or a maximum of two DMRS symbols 338 per repetition 334, the control information 302 may indicate a first set of values ​​(e.g., one, two, or four) that may be used for the DMRS sharing factor 330 or a second set of values ​​(e.g., one, two, four, or eight) that may be used for the DMRS sharing factor 330, respectively.

[0091] Additionally, in some examples, one or more parameters 308 include an actual number 356 of DMRS symbols 338 for each repetition 334 of the uplink transmission 332. In some implementations, the actual number 356 is less than the configured number 354 (e.g., due to a symbol reduction event occurring after the uplink transmission 332 is scheduled).

[0092] In some examples, the number of DMRS sharing patterns 306 available for uplink transmission 332 indicated by the control information 302 is based on the actual number 356. To illustrate, in some examples, the control information 302 may include one number of DMRS sharing patterns 306 for a first value of the actual number 356, and may include another number of DMRS sharing patterns 306 for a second value of the actual number 356. As illustrative, non-limiting examples, if the actual number 356 indicates one DMRS symbol 338 per repetition 334 or two DMRS symbols 338 per repetition 334, the control information 302 may indicate four DMRS sharing patterns 306 or eight DMRS sharing patterns 306, respectively.

[0093] Alternatively or additionally, the DMRS sharing factor 330 for the uplink transmission 332 (or a set of DMRS sharing factors 330 that may be used for the uplink transmission 332) may be based on the actual number 356. As illustrative, non-limiting examples, if the actual number 356 indicates a maximum of one DMRS symbol 338 per repetition 334 or a maximum of two DMRS symbols 338 per repetition 334, the control information 302 may indicate a first set of values ​​(e.g., 1, 2, or 4) that may be used for the DMRS sharing factor 330 or a second set of values ​​(e.g., 1, 2, 4, or 8) that may be used for the DMRS sharing factor 330, respectively.

[0094] The one or more parameters 308 may include a repetition type 352 for the uplink transmission 332. In some examples, one or more of the base station 105 or the UE 115 is configured to determine the repetition type 352 from among a plurality of repetition types and determine the DMRS sharing pattern 310 based on the repetition type 352. For illustration, the plurality of repetition types may include a first repetition type associated with a maximum of one repetition per time slot and may also include a second repetition type associated with one or more repetitions per time slot. The first repetition type may correspond to a PUSCH repetition type "A" specified by the 5G NR wireless communication protocol, and the second repetition type may correspond to a PUSCH repetition type "B" specified by the 5G NR wireless communication protocol.

[0095] In addition, note that one or more aspects of the present invention can be performed on a per-repetition type basis. For example, the control information 302 may include a first version of a DMRS sharing mode 306 for a first repetition type, and may also include a second version of a DMRS sharing mode 306 for a second repetition type. In one example, the UE 115 is configured to report to the base station 105 a first capability of supporting DMRS sharing of the first repetition type and a second capability of supporting DMRS sharing of the second repetition type.

[0096] Reference Figures 3 to 6 One or more aspects described may improve efficiency or performance of a wireless communication system. For example, by determining a DMRS sharing pattern 310 for an uplink transmission 332 based on one or more parameters 308 of the uplink transmission 332, the DMRS sharing pattern 310 may be "customized" or "tailored" for a particular uplink transmission 332. As a result, uplink transmissions of different parameters may be associated with different DMRS sharing patterns, which may improve efficiency or performance in some cases compared to certain other techniques that use a common DMRS sharing pattern for uplink transmissions of different parameters.

[0097] Although certain examples of DMRS sharing have been described with reference to uplink transmissions 332 from UE 115 to base station 105, in some other examples, one or more examples described herein may be applied to one or more other transmissions (alternatively or in addition to uplink transmissions 332). For example, base station 105 may transmit (e.g., to UE 115) a downlink transmission associated with a DMRS sharing pattern in DMRS sharing pattern 306. As another example, UE 115 may transmit (e.g., to another UE 115) a sidelink transmission associated with a DMRS sharing pattern in DMRS sharing pattern 306.

[0098] To further illustrate, a method may include: communicating control information 302 by a first device to a second device. The control information 302 may indicate a mapping of a transmission parameter (such as an uplink transmission parameter, a downlink transmission parameter, a sidelink transmission parameter, or a combination thereof) to one or more DMRS sharing modes (e.g., a DMRS sharing mode 306). The method may also include: communicating a transmission by a first device to a second device according to a DMRS sharing mode, wherein a DMRS sharing mode is selected from one or more DMRS sharing modes based on one or more parameters of the transmission. In some examples, the first device corresponds to a base station 105, the second device corresponds to a UE 115, and the transmission corresponds to a downlink transmission. In some other examples, the first device corresponds to a UE 115, the second device corresponds to a base station 105, and the transmission corresponds to an uplink transmission. In some other examples, the first device corresponds to a UE 115, the second device corresponds to another UE 115, and the transmission corresponds to a sidelink transmission. As used herein, a "communication" transmission may refer to receiving a transmission or transmitting a transmission.

[0099] refer to Figure 7 , a specific illustrative example of a method of wireless communication is depicted and generally designated as 700. In some examples, UE 115 is configured to perform Figure 7 The operations of method 700 are as follows.

[0100] The method 700 includes receiving control information by a UE device at 702. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. For example, the UE 115 may receive one or more configuration messages 320 indicating the control information 302. The control information 302 indicates a mapping of uplink transmission parameters 304 to one or more DMRS sharing patterns, such as the DMRS sharing pattern 306.

[0101] The method 700 also includes transmitting an uplink transmission to the base station based on the DMRS sharing pattern, at 704, wherein the DMRS sharing pattern is selected from one or more DMRS sharing patterns based on one or more parameters of the uplink transmission. For example, the UE 115 can determine the DMRS sharing pattern 310 from the DMRS sharing pattern 306 based on the one or more parameters 308 of the uplink transmission 332, and can transmit the uplink transmission 332 to the base station 105 according to the DMRS sharing pattern 310.

[0102] refer to Figure 8 , a specific illustrative example of a method of wireless communication is depicted and generally designated as 800. In some examples, base station 105 is configured to perform Figure 8 The operations of method 800 are as follows.

[0103] The method 800 includes transmitting control information by a base station to a UE device at 802. The control information indicates a mapping of uplink transmission parameters to one or more DMRS sharing patterns. For example, the base station 105 may transmit one or more configuration messages 320 indicating the control information 302 to the UE 115. The control information 302 indicates a mapping of uplink transmission parameters 304 to one or more DMRS sharing patterns, such as the DMRS sharing pattern 306.

[0104] The method 800 also includes receiving an uplink transmission from the UE device according to the DMRS sharing pattern at 804, wherein the DMRS sharing pattern is selected from one or more DMRS sharing patterns based on one or more parameters of the uplink transmission. For example, the base station 105 can determine the DMRS sharing pattern 310 from the DMRS sharing pattern 306 based on the one or more parameters 308 of the uplink transmission 332, and can receive the uplink transmission 332 from the UE 115 according to the DMRS sharing pattern 310.

[0105] Fig. 9 1 is a block diagram illustrating a UE 115 configured according to one aspect of the present disclosure. The UE 115 includes Figure 2 1. For example, the UE 115 includes a controller / processor 280 that is configured to execute logic or computer instructions stored in a memory 282 and control one or more components of the UE 115 that provide the features and functions of the UE 115. Under the control of the controller / processor 280, the UE 115 sends and receives signals via radios 901a-r and antennas 252a-r. The radios 901a-r include Figure 2 The various components and hardware of the MIMO system include modulators / demodulators 254a-r, a MIMO detector 256, a receive processor 258, a transmit processor 264, and a TX MIMO processor 266.

[0106] The memory 282 is configured to store instructions executable by the controller / processor 280 to initiate, control, or perform one or more operations described herein. For example, the memory 282 may store uplink transmission analysis instructions 902 executable by the controller / processor 280 to analyze one or more aspects of the uplink transmission 332 (e.g., based on the scheduling message 324, the indication of the DMRS sharing configuration parameter 328, the indication of the DMRS sharing factor 330, other information, or a combination thereof) to identify one or more parameters 308. As another example, the memory 282 may store DMRS sharing mode selection instructions 904, which may be executed by the controller / processor 280 to select the DMRS sharing mode 310 from the control information 302 based on the one or more parameters 308. As another example, the memory 282 may store DMRS generation instructions 906, which may be pre-programmed by the controller / processor 280 to cause the radio device 901a-r to generate the uplink transmission 332 according to the DMRS sharing mode 310.

[0107] Fig.10 1 is a block diagram illustrating a base station 105 configured according to one aspect of the present disclosure. The base station 105 includes Figure 2 For example, the base station 105 includes a controller / processor 240 that is configured to execute logic or computer instructions stored in a memory 242 and control one or more components of the base station 105 that provide the features and functions of the base station 105. Under the control of the controller / processor 240, the base station 105 transmits and receives signals via the radios 1001a-t and antennas 234a-t. The radios 1001a-t include Figure 2 The various components and hardware of the MIMO processor 230 include modulators / demodulators 232a-t, a MIMO detector 236, a receive processor 238, a transmit processor 220, and a TX MIMO processor 230.

[0108] The memory 242 is configured to store instructions executable by the controller / processor 240 to initiate, control, or perform one or more operations described herein. For example, the memory 242 may store uplink transmission analysis instructions 1002 executable by the controller / processor 240 to analyze one or more aspects of the uplink transmission 332 (e.g., based on the scheduling message 324, the indication of the DMRS sharing configuration parameter 328, the indication of the DMRS sharing factor 330, other information, or a combination thereof) to identify one or more parameters 308. As another example, the memory 242 may store DMRS sharing mode selection instructions 1004 executable by the controller / processor 240 to select the DMRS sharing mode 310 from the control information 302 based on the one or more parameters 308. As another example, the memory 242 may store DMRS demodulation instructions 1006 executable by the controller / processor 240 to cause the radios 1001a - t to receive the uplink transmission 332 according to the DMRS sharing pattern 310 (eg, by demodulating the repetition 334 based on the DMRS sharing pattern 310 ).

[0109] In a first aspect, a method of wireless communication includes: receiving, by a user equipment (UE) device, one or more configuration messages including control information, wherein the control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns. The method also includes: determining, based on the one or more parameters of the uplink transmission, a DMRS sharing pattern for the uplink transmission from the DMRS sharing patterns indicated by the control information, and transmitting the uplink transmission to a base station according to the DMRS sharing pattern.

[0110] In a second aspect, alternatively or in addition to the first aspect, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing mode indicates an ordering of one or more uplink repetitions of the multiple uplink repetitions that include DMRS with one or more other uplink repetitions of the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

[0111] In the third aspect, alternatively or in addition to one or more of the first to second aspects, the method further comprises: receiving a message from the base station scheduling the uplink transmission and including a configured number of repetitions of the uplink transmission, and the one or more parameters include the configured number of repetitions of the uplink transmission.

[0112] In a fourth aspect, alternatively or in addition to one or more of the first to third aspects, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0113] In a fifth aspect, alternatively or in addition to one or more of the first to fourth aspects, the DMRS sharing pattern is based on a repetition number less than a configured number, and the method further comprises: repeating the DMRS sharing pattern over the configured repetition number of uplink transmissions.

[0114] In a sixth aspect, alternatively or in addition to one or more of the first to fifth aspects, the DMRS sharing pattern includes a plurality of DMRS sharing patterns for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0115] In a seventh aspect, alternatively or in addition to one or more of the first to sixth aspects, a DMRS sharing mode is selected from among a plurality of DMRS sharing modes.

[0116] In the eighth aspect, alternatively or in addition to one or more of the first to seventh aspects, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0117] In a ninth aspect, alternatively or in addition to one or more of the first to eighth aspects, the method further comprises: receiving an indication of a DMRS sharing factor from a base station.

[0118] In the tenth aspect, alternatively or in addition to one or more of the first to ninth aspects, the method further comprises: determining a repetition type of uplink transmission from among a plurality of repetition types, and determining a DMRS sharing mode based on the repetition type.

[0119] In the eleventh aspect, alternatively or in addition to one or more of the first to tenth aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the method also includes: the UE device reports to the base station a first capability of supporting DMRS sharing for the first repetition type and a second capability of supporting DMRS sharing for the second repetition type.

[0120] In a twelfth aspect, alternatively or in addition to one or more of the first to eleventh aspects, the method further comprises detecting a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0121] In a thirteenth aspect, alternatively or in addition to one or more of the first to twelfth aspects, the method further comprises: applying the DMRS sharing pattern to repetitions of the uplink transmission regardless of the actual number.

[0122] In the fourteenth aspect, alternatively or in addition to one or more of the first to thirteenth aspects, the method further includes: in response to detecting a canceled repetition of the uplink transmission, redetermining the DMRS sharing pattern based on the actual number of repetitions; and applying the redetermined DMRS sharing pattern to the remaining repetitions of the uplink transmission.

[0123] In a fifteenth aspect, alternatively or in addition to one or more of the first to fourteenth aspects, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0124] In a sixteenth aspect, alternatively or in addition to one or more of the first to fifteenth aspects, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0125] In a seventeenth aspect, alternatively or in addition to one or more of the first to sixteenth aspects, a DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0126] In an eighteenth aspect, optionally or in addition to one or more of the first to seventeenth aspects, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0127] In the nineteenth aspect, alternatively or in addition to one or more of the first to eighteenth aspects, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0128] In a twentieth aspect, alternatively or in addition to one or more of the first to nineteenth aspects, a method is according to any combination of the first to nineteenth aspects.

[0129] In aspect 21, alternatively or in addition to one or more aspects from aspects 1 to 20, a wireless communication method includes: transmitting, by a base station to a UE device, one or more configuration messages including control information, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode; determining, based on one or more parameters of the uplink transmission, a DMRS sharing mode of the uplink transmission from the DMRS sharing modes indicated by the control information; and receiving uplink transmission from the UE device according to the DMRS sharing mode.

[0130] In aspect 22, alternatively or in addition to one or more of aspects 1 to 21, the uplink transmission includes multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0131] In the twenty-third aspect, alternatively or in addition to one or more aspects from the first to the twenty-second aspects, the method further comprises: transmitting a message from a base station to a UE device, the message scheduling an uplink transmission and including a message of a configured number of repetitions of the uplink transmission, wherein the one or more parameters include the configured number of repetitions of the uplink transmission.

[0132] In a twenty-fourth aspect, alternatively or in addition to one or more of aspects one to twenty-third, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0133] In a twenty-fifth aspect, alternatively or in addition to one or more of the first to twenty-fourth aspects, the DMRS sharing pattern is based on a repetition number that is less than a configured number, and the DMRS sharing pattern is repeated over the repetition number of the configured uplink transmission.

[0134] In a twenty-sixth aspect, alternatively or in addition to one or more of the first to twenty-fifth aspects, the DMRS sharing pattern of the control information includes multiple DMRS sharing patterns for a configured repetition number and a DMRS sharing factor for uplink transmission.

[0135] In a twenty-seventh aspect, alternatively or in addition to one or more of the first to twenty-sixth aspects, a DMRS sharing mode is selected from among a plurality of DMRS sharing modes.

[0136] In aspect 28, alternatively or in addition to one or more of aspects 1 to 27, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0137] In a twenty-ninth aspect, alternatively or in addition to one or more of the first to twenty-eighth aspects, the method further comprises: transmitting an indication of a DMRS sharing factor from the base station to the UE device.

[0138] In a thirtieth aspect, alternatively or in addition to one or more of the first to twenty-ninth aspects, the method further comprises: determining a repetition type of uplink transmission from among a plurality of repetition types, and determining a DMRS sharing mode based on the repetition type.

[0139] In the thirty-first aspect, alternatively or in addition to one or more aspects of the first to thirtieth aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the method also includes: receiving, at the base station from the UE, a report on a first capability to support DMRS sharing for the first repetition type and a second capability to support DMRS sharing for the second repetition type.

[0140] In aspect thirty-second, alternatively or in addition to one or more of aspects one to thirty-first, the method further comprises detecting a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0141] In a thirty-third aspect, alternatively or in addition to one or more of the first to thirty-second aspects, the DMRS sharing pattern is applied to the remaining repetitions of the uplink transmission regardless of the actual number.

[0142] In aspect 34, alternatively or in addition to one or more of aspects 1 to 33, in response to detecting a canceled repetition of the uplink transmission, a DMRS sharing pattern is re-determined; and the re-determined DMRS sharing pattern is applied to the remaining repetitions.

[0143] In a thirty-fifth aspect, alternatively or in addition to one or more of the first to thirty-fourth aspects, the one or more parameters of the uplink transmission include the number of DMRS symbols for each repetition of the configuration of the uplink transmission.

[0144] In aspect 36, alternatively or in addition to one or more of aspects 1 to 35, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0145] In a thirty-seventh aspect, alternatively or in addition to one or more of the first to thirty-sixth aspects, the DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0146] In a thirty-eighth aspect, alternatively or in addition to one or more of the first to thirty-seventh aspects, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0147] In aspect thirty-ninth, alternatively or in addition to one or more of aspects one to thirty-eight, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0148] In a 40th aspect, alternatively or in addition to one or more of the first to thirty-ninth aspects, a method is according to any combination of the twenty-first to thirty-ninth aspects.

[0149] In the forty-first aspect, alternatively or in addition to one or more aspects of the first to fortieth aspects, an apparatus for wireless communication includes: a memory; and one or more processors coupled to the memory, the one or more processors being configured to: receive, at a user equipment (UE) device, one or more configuration messages including control information, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode; determine, based on one or more parameters of the uplink transmission, a DMRS sharing mode for the uplink transmission from the DMRS sharing modes indicated by the control information; and initiate transmission of an uplink transmission to a base station according to the DMRS sharing mode.

[0150] In aspect 42, alternatively or in addition to one or more of aspects 1 to 41, the uplink transmission includes multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0151] In aspect 43, alternatively or in addition to one or more of aspects 1 to 42, one or more processors are further configured to: receive a message from the base station scheduling the uplink transmission and including a configured number of repetitions of the uplink transmission, and the one or more parameters include the configured number of repetitions of the uplink transmission.

[0152] In a 44th aspect, alternatively or in addition to one or more of aspects 1 to 43, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0153] In aspect 45, alternatively or in addition to one or more of aspects 1 to 44, the DMRS sharing pattern is based on a number of repetitions less than a configured number, and one or more processors are further configured to repeat the DMRS sharing pattern over the number of repetitions of the configured uplink transmission.

[0154] In a 46th aspect, alternatively or in addition to one or more of the first to 45th aspects, the DMRS sharing pattern of the control information includes multiple DMRS sharing patterns for a configured repetition number and a DMRS sharing factor for uplink transmission.

[0155] In a 47th aspect, alternatively or in addition to one or more of the first to 46th aspects, the one or more processors are further configured to: select a DMRS sharing mode from among a plurality of DMRS sharing modes.

[0156] In aspect 48, alternatively or in addition to one or more of aspects 1 to 47, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0157] In a 49th aspect, alternatively or in addition to one or more of the first to 48th aspects, the one or more processors are further configured to: receive an indication of a DMRS sharing factor from a base station.

[0158] In the fiftieth aspect, alternatively or in addition to one or more of the first to forty-ninth aspects, the one or more processors are further configured to: determine a repetition type of uplink transmission from a plurality of repetition types, and determine a DMRS sharing mode based on the repetition type.

[0159] In the fifty-first aspect, alternatively or in addition to one or more aspects from the first to the fiftieth aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the one or more processors are further configured to: the UE device reports to the base station a first capability of supporting DMRS sharing for the first repetition type and a second capability of supporting DMRS sharing for the second repetition type.

[0160] In aspect fifty-second, alternatively or in addition to one or more of aspects one to fifty-first, one or more processors are configured to detect a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0161] In a fifty-third aspect, alternatively or in addition to one or more of aspects one to fifty-second, one or more processors are further configured to: apply the DMRS sharing pattern to repetitions of the uplink transmission regardless of the actual number.

[0162] In aspect fifty-four, alternatively or in addition to one or more of aspects one to fifty-three, one or more processors are further configured to: in response to detecting a canceled repetition of the uplink transmission, redetermine the DMRS sharing pattern based on the actual number of repetitions; and apply the redetermined DMRS sharing pattern to the remaining repetitions of the uplink transmission.

[0163] In a fifty-fifth aspect, alternatively or in addition to one or more of aspects one to fifty-four, the one or more parameters of the uplink transmission include the number of DMRS symbols for each repetition of the configuration of the uplink transmission.

[0164] In a fifty-sixth aspect, alternatively or in addition to one or more of the first to fifty-fifth aspects, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0165] In a fifty-seventh aspect, alternatively or in addition to one or more of aspects 1 to 56, the DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0166] In a fifty-eighth aspect, alternatively or in addition to one or more of aspects one to fifty-seven, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0167] In aspect fifty-ninth, alternatively or in addition to one or more of aspects one to fifty-eight, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0168] In a sixtieth aspect, alternatively or in addition to one or more of the first to fifty-ninth aspects, a device is according to any combination of the fortieth to fifty-ninth aspects.

[0169] In the sixty-first aspect, alternatively or in addition to one or more aspects from the first to the sixtieth aspects, an apparatus for wireless communication comprises: a memory; and one or more processors coupled to the memory, the processors being configured to: initiate sending one or more configuration messages including control information from a base station to a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode; determine a DMRS sharing mode of uplink transmission from the DMRS sharing mode indicated by the control information based on one or more parameters of the uplink transmission; and receive uplink transmission from the UE device according to the DMRS sharing mode.

[0170] In aspect sixty-second, alternatively or in addition to one or more of aspects one to sixty-first, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates an ordering of one or more uplink repetitions among the multiple uplink repetitions that include DMRS and one or more other uplink repetitions among the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0171] In aspect sixty-third, alternatively or in addition to one or more of aspects one to sixty-second, one or more processors are further configured to: transmit a message from a base station to a UE device, the message scheduling an uplink transmission and including a message of a configured number of repetitions of the uplink transmission, wherein the one or more parameters include the configured number of repetitions of the uplink transmission.

[0172] In a sixty-fourth aspect, alternatively or in addition to one or more of aspects one to sixty-three, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0173] In aspect sixty-fifth, alternatively or in addition to one or more of aspects one to sixty-fourth, the DMRS sharing pattern is based on a repetition number that is less than a configured number, and the DMRS sharing pattern is repeated over the repetition number of the configured uplink transmission.

[0174] In a sixty-sixth aspect, alternatively or in addition to one or more of the first to sixty-fifth aspects, the DMRS sharing pattern of the control information includes multiple DMRS sharing patterns for a configured repetition number and a DMRS sharing factor for uplink transmission.

[0175] In a sixty-seventh aspect, alternatively or in addition to one or more of the first to sixty-sixth aspects, the one or more processors are further configured to: select a DMRS sharing mode from among a plurality of DMRS sharing modes.

[0176] In the sixty-eighth aspect, alternatively or in addition to one or more of the first to sixty-seventh aspects, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0177] In a sixty-ninth aspect, alternatively or in addition to one or more of the first to sixty-eight aspects, the one or more processors are further configured to: transmit an indication of a DMRS sharing factor from the base station to the UE device.

[0178] In the seventieth aspect, alternatively or in addition to one or more of the first to sixty-ninth aspects, the one or more processors are further configured to: determine a repetition type of uplink transmission from a plurality of repetition types, and determine a DMRS sharing mode based on the repetition type.

[0179] In the seventy-first aspect, alternatively or in addition to one or more of the first to seventieth aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the one or more processors are further configured to: receive, at the base station from the UE, a report of a first capability to support DMRS sharing for the first repetition type and a second capability to support DMRS sharing for the second repetition type.

[0180] In aspect seventy-second, alternatively or in addition to one or more of aspects one to seventy-first, one or more processors are configured to detect a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0181] In a seventy-third aspect, alternatively or in addition to one or more of aspects one to seventy-second, the DMRS sharing pattern is applied to the remaining repetitions of the uplink transmission regardless of the actual number.

[0182] In aspect seventy-four, alternatively or in addition to one or more of aspects one to seventy-three, in response to detecting a canceled repetition of the uplink transmission, a DMRS sharing pattern is re-determined; and the re-determined DMRS sharing pattern is applied to the remaining repetitions.

[0183] In a seventy-fifth aspect, alternatively or in addition to one or more of aspects one to seventy-fourth, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0184] In aspect seventy-six, alternatively or in addition to one or more of aspects one to seventy-fifth, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0185] In a seventy-seventh aspect, alternatively or in addition to one or more of aspects one to seventy-six, a DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0186] In a seventy-eighth aspect, alternatively or in addition to one or more of aspects one to seventy-seven, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0187] In aspect seventy-ninth, alternatively or in addition to one or more of aspects one to seventy-eight, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0188] In an eightieth aspect, alternatively or in addition to one or more of aspects 1 to 79, a device is according to any combination of aspects 61 to 79.

[0189] In the eighty-first aspect, alternatively or in addition to one or more of the first to eighty aspects, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations, the operations comprising: receiving, by a user equipment (UE) device, one or more configuration messages including control information, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode; determining, based on one or more parameters of the uplink transmission, a DMRS sharing mode for the uplink transmission from the DMRS sharing modes indicated by the control information; and transmitting the uplink transmission to a base station according to the DMRS sharing mode.

[0190] In aspect 82, alternatively or in addition to one or more of aspects 1 to 81, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing mode indicates an ordering of one or more uplink repetitions of the multiple uplink repetitions that include DMRS with one or more other uplink repetitions of the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

[0191] In aspect 83, alternatively or in addition to one or more of aspects 1 to 82, the operation further comprises: receiving a message from the base station scheduling the uplink transmission and including a configured number of repetitions of the uplink transmission, and the one or more parameters include the configured number of repetitions of the uplink transmission.

[0192] In an eighty-fourth aspect, alternatively or in addition to one or more of aspects one to eighty-three, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0193] In aspect 85, alternatively or in addition to one or more of aspects 1 to 84, the DMRS sharing pattern is based on a number of repetitions less than a configured number, and the operation further comprises: repeating the DMRS sharing pattern over the number of repetitions of the configured uplink transmission.

[0194] In an eighty-sixth aspect, alternatively or in addition to one or more of the first to eighty-fifth aspects, the DMRS sharing pattern of the control information includes multiple DMRS sharing patterns for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0195] In an eighty-seventh aspect, alternatively or in addition to one or more of the first to eighty-sixth aspects, a DMRS sharing mode is selected from among a plurality of DMRS sharing modes.

[0196] In aspect 88, alternatively or in addition to one or more of aspects 1 to 87, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0197] In an eighty-ninth aspect, alternatively or in addition to one or more of aspects one to eighty-eight, the operations further comprise: receiving an indication of a DMRS sharing factor from a base station.

[0198] In the ninetieth aspect, alternatively or in addition to one or more of the first to eighty-ninth aspects, the operation further comprises: determining a repetition type of uplink transmission from among a plurality of repetition types, and determining a DMRS sharing mode based on the repetition type.

[0199] In aspect ninety-first, alternatively or in addition to one or more aspects from aspects one to ninety, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the operation also includes: the UE device reports to the base station a first capability of supporting DMRS sharing for the first repetition type and a second capability of supporting DMRS sharing for the second repetition type.

[0200] In aspect ninety-second, alternatively or in addition to one or more of aspects one to ninety-first, the operation further comprises detecting a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0201] In a ninety-third aspect, alternatively or in addition to one or more of aspects one to ninety-second, the operation further comprises: applying the DMRS sharing pattern to repetitions of the uplink transmission regardless of the actual number.

[0202] In aspect ninety-four, alternatively or in addition to one or more of aspects one to ninety-three, the operation further comprises: in response to detecting a canceled repetition of the uplink transmission, redetermining the DMRS sharing pattern based on the actual number of repetitions; and applying the redetermined DMRS sharing pattern to the remaining repetitions of the uplink transmission.

[0203] In a ninety-fifth aspect, alternatively or in addition to one or more of aspects one to ninety-four, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0204] In a ninety-sixth aspect, alternatively or in addition to one or more of aspects one to ninety-fifth, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0205] In a ninety-seventh aspect, alternatively or in addition to one or more of aspects one to ninety-six, a DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0206] In a ninety-eighth aspect, alternatively or in addition to one or more of aspects one to ninety-seven, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0207] In the ninety-ninth aspect, alternatively or in addition to one or more of the first to ninety-eight aspects, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0208] In a hundredth aspect, alternatively or in addition to one or more of the first to ninety-ninth aspects, a non-transitory computer readable medium is according to any combination of the eighty-first to ninety-ninth aspects.

[0209] In the one hundred and first aspects, alternatively or in addition to one or more aspects of the first to one hundred aspects, a non-transitory computer-readable medium stores instructions that can be executed by a processor to perform operations, the operations including: transmitting, by a base station to a user equipment (UE) device, one or more configuration messages including control information, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode; determining, based on one or more parameters of the uplink transmission, a DMRS sharing mode for the uplink transmission from the DMRS sharing mode indicated by the control information; and receiving an uplink transmission from the UE device according to the DMRS sharing mode.

[0210] In aspect one hundred and second, alternatively or in addition to one or more of aspects one to one hundred and first, the uplink transmission includes multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions among the multiple uplink repetitions that include DMRS and one or more other uplink repetitions among the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0211] In aspect 103, alternatively or in addition to one or more of aspects 1 to 102, the operation also includes: transmitting a message from a base station to a UE device, the message scheduling uplink transmission and including a message of a configured number of repetitions of the uplink transmission, wherein the one or more parameters include the configured number of repetitions of the uplink transmission.

[0212] In aspect one hundred and fourth, alternatively or in addition to one or more of aspects one to one hundred and third, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0213] In the one hundred and fifth aspect, alternatively or in addition to one or more of the first to one hundred and fourth aspects, the DMRS sharing pattern is based on a repetition number that is less than a configured number, and the DMRS sharing pattern is repeated over the repetition number of the configured uplink transmission.

[0214] In a one-hundred and sixth aspect, alternatively or in addition to one or more of the first to one-hundred and fifth aspects, the DMRS sharing pattern of the control information comprises a plurality of DMRS sharing patterns for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0215] In a one-hundred and seventh aspect, alternatively or in addition to one or more of the first to one-hundred and sixth aspects, a DMRS sharing mode is selected from among a plurality of DMRS sharing modes.

[0216] In the one hundred and eighth aspect, alternatively or in addition to one or more of the first to one hundred and seventh aspects, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0217] In the one-hundred and ninth aspect, alternatively or in addition to one or more of the first to one-hundred and eighth aspects, the operation further comprises: transmitting an indication of a DMRS sharing factor from the base station to the UE device.

[0218] In aspect one hundred and ten, alternatively or in addition to one or more of aspects one to one hundred and nine, the operation further comprises: determining a repetition type of uplink transmission from among a plurality of repetition types, and determining a DMRS sharing mode based on the repetition type.

[0219] In aspect one hundred and eleven, alternatively or in addition to one or more of aspects one to one hundred and ten, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the operation also includes: receiving, at the base station from the UE, a report of a first capability to support DMRS sharing for the first repetition type and a second capability to support DMRS sharing for the second repetition type.

[0220] In aspect one hundred and twelfth, alternatively or in addition to one or more of aspects one to one hundred and eleven, the operation further comprises detecting a puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0221] In a thirteenth aspect, alternatively or in addition to one or more of the first to twelfth aspects, the DMRS sharing pattern is applied to the remaining repetitions of the uplink transmission regardless of the actual number.

[0222] In aspect one hundred and fourteen, alternatively or in addition to one or more of aspects one to one hundred and thirteen, in response to detecting a canceled repetition of the uplink transmission, a DMRS sharing pattern is re-determined; and the re-determined DMRS sharing pattern is applied to the remaining repetitions.

[0223] In a fifteenth aspect, alternatively or in addition to one or more of the first to fourteenth aspects, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0224] In the sixteenth aspect, alternatively or in addition to one or more of the first to fifteenth aspects, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0225] In a seventeenth aspect, alternatively or in addition to one or more of the first to sixteenth aspects, a DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0226] In a one hundred and eighteenth aspect, alternatively or in addition to one or more of the first to 117th aspects, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0227] In aspect 119, alternatively or in addition to one or more of aspects 1 to 118, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0228] In a one hundred and twentieth aspect, alternatively or in addition to one or more of aspects one to one hundred and nineteen, a non-transitory computer readable medium is according to any combination of aspects one hundred and one to one hundred and nineteen.

[0229] In one hundred and twenty-first aspects, alternatively or in addition to one or more of aspects one to one hundred and twenty, an apparatus for wireless communication includes: a component for storing instructions; and a component for executing the instructions to receive one or more configuration messages including control information at a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode, determine a DMRS sharing mode for uplink transmission from the DMRS sharing modes indicated by the control information based on one or more parameters of the uplink transmission, and initiate transmission of an uplink transmission to a base station according to the DMRS sharing mode.

[0230] In aspect one hundred and twenty-two, alternatively or in addition to one or more of aspects one to one hundred and twenty-one, the uplink transmission includes multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions among the multiple uplink repetitions that include DMRS and one or more other uplink repetitions among the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0231] In aspect one hundred and twenty-third, alternatively or in addition to one or more of aspects one to one hundred and twenty-second, the component for running instructions is further configured to: receive a message from the base station scheduling the uplink transmission and including a configured number of repetitions of the uplink transmission, and the one or more parameters include the configured number of repetitions of the uplink transmission.

[0232] In a one hundred and twenty-fourth aspect, alternatively or in addition to one or more of aspects one to one hundred and twenty-three, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0233] In aspect one hundred and twenty-fifth, alternatively or in addition to one or more of aspects one to one hundred and twenty-fourth, the DMRS sharing pattern is based on a number of repetitions less than a configured number, and the component for running the instruction is further configured to repeat the DMRS sharing pattern at the number of repetitions of the configured uplink transmission.

[0234] In a one-hundred and twenty-sixth aspect, alternatively or in addition to one or more of the first to one-hundred and twenty-fifth aspects, the DMRS sharing pattern of the control information comprises a plurality of DMRS sharing patterns for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0235] In a one-hundred and twenty-seventh aspect, alternatively or in addition to one or more of the first to one-hundred and twenty-sixth aspects, the means for executing instructions is further configured to: select a DMRS sharing mode from among a plurality of DMRS sharing modes.

[0236] In aspect 128, alternatively or in addition to one or more of aspects 1 to 127, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0237] In a one hundred and twenty-ninth aspect, alternatively or in addition to one or more of aspects one to one hundred and twenty-eight, the means for executing instructions is further configured to: receive an indication of a DMRS sharing factor from a base station.

[0238] In aspect one hundred and thirtieth, alternatively or in addition to one or more of aspects one to one hundred and twenty-nine, the component for executing instructions is further configured to: determine a repetition type of uplink transmission from a plurality of repetition types, and determine a DMRS sharing mode based on the repetition type.

[0239] In the one hundred and thirty-first aspect, alternatively or in addition to one or more of the first to one hundred and thirty aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the component for running the instruction is also configured to: the UE device reports to the base station a first capability of supporting DMRS sharing for the first repetition type and a second capability of supporting DMRS sharing for the second repetition type.

[0240] In aspect one hundred and thirty-two, alternatively or in addition to one or more of aspects one to one hundred and thirty-one, the component for running instructions is also configured to: detect a modified puncturing event associated with the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0241] In a one-hundred and thirty-third aspect, alternatively or in addition to one or more of aspects one to one-hundred and thirty-two, the means for executing instructions is further configured to: apply the DMRS sharing pattern to repetitions of the uplink transmission regardless of the actual number.

[0242] In aspect 134, alternatively or in addition to one or more of aspects 1 to 133, the component for running instructions is also configured to: in response to detecting a canceled repetition of the uplink transmission, redetermine the DMRS sharing pattern based on the actual number of repetitions; and apply the redetermined DMRS sharing pattern to the remaining repetitions of the uplink transmission.

[0243] In a one hundred and thirty-fifth aspect, alternatively or in addition to one or more of aspects one to one hundred and thirty-four, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0244] In the one hundred and thirty-sixth aspect, alternatively or in addition to one or more of the first to one hundred and thirty-fifth aspects, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0245] In the one hundred and thirty-seventh aspect, alternatively or in addition to one or more of the first to one hundred and thirty-sixth aspects, the DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0246] In aspect one hundred and thirty-eight, alternatively or in addition to one or more of aspects one to one hundred and thirty-seven, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0247] In aspect one hundred and thirty-ninth, alternatively or in addition to one or more of aspects one to one hundred and thirty-eight, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0248] In a one-hundred and forty-ninth aspect, alternatively or in addition to one or more of the first to one-hundred and thirty-ninth aspects, an apparatus is according to any one of the first to one-hundred and thirty-ninth aspects.

[0249] In one hundred and forty-first aspect, alternatively or in addition to one or more of aspects one to one hundred and forty, an apparatus for wireless communication comprises: a component for storing instructions; and a component for executing the instructions to initiate sending one or more configuration messages including control information from a base station to a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to a demodulation reference signal (DMRS) sharing mode, determining a DMRS sharing mode of the uplink transmission from the DMRS sharing mode indicated by the control information based on one or more parameters of the uplink transmission, and receiving an uplink transmission from the UE device according to the DMRS sharing mode.

[0250] In aspect one hundred and forty-two, alternatively or in addition to one or more of aspects one to one hundred and forty-one, the uplink transmission includes multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0251] In aspect one hundred and forty-third, alternatively or in addition to one or more of aspects one to one hundred and forty-second, the component for running instructions is further configured to: transmit a message from a base station to a UE device, the message scheduling an uplink transmission and including a message of a configured number of repetitions of the uplink transmission, wherein the one or more parameters include the configured number of repetitions of the uplink transmission.

[0252] In aspect one hundred and forty-four, alternatively or in addition to one or more of aspects one to one hundred and forty-three, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0253] In aspect one hundred and forty-fifth, alternatively or in addition to one or more of aspects one to one hundred and forty-four, the DMRS sharing pattern is based on a repetition number that is less than a configured number, and the DMRS sharing pattern is repeated over the repetition number of the configured uplink transmissions.

[0254] In a one hundred and forty-sixth aspect, alternatively or in addition to one or more of aspects one to one hundred and forty-fifth, the DMRS sharing pattern of the control information comprises a plurality of DMRS sharing patterns for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0255] In a one-hundred and forty-seventh aspect, alternatively or in addition to one or more of the first to one-hundred and forty-sixth aspects, the means for executing instructions is further configured to: select a DMRS sharing mode from among a plurality of DMRS sharing modes.

[0256] In aspect 148, alternatively or in addition to one or more of aspects 1 to 147, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control (RRC) configuration signaling, downlink control information (DCI) signaling, or media access control (MAC) control element (MAC-CE) signaling.

[0257] In the one hundred and forty-ninth aspect, alternatively or in addition to one or more of the first to one hundred and forty-eight aspects, the means for executing instructions is further configured to: transmit an indication of a DMRS sharing factor from a base station to a UE device.

[0258] In aspect one hundred and fiftieth, alternatively or in addition to one or more of aspects one to one hundred and forty-nine, the component for running instructions is further configured to: determine a repetition type of uplink transmission from a plurality of repetition types, and determine a DMRS sharing mode based on the repetition type.

[0259] In the one hundred and fifty-first aspect, alternatively or in addition to one or more of the first to one hundred and fifty aspects, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and the component for running the instruction is further configured to: receive, at the base station from the UE, a report of a first capability to support DMRS sharing for the first repetition type and a second capability to support DMRS sharing for the second repetition type.

[0260] In aspect one hundred and fifty-two, alternatively or in addition to one or more of aspects one to one hundred and fifty-one, the component for running instructions is also configured to: detect a modified puncturing event associated with the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0261] In a one-hundred and fifty-third aspect, alternatively or in addition to one or more of aspects one to one-hundred and fifty-second, the DMRS sharing pattern is applied to remaining repetitions of the uplink transmission regardless of the actual number.

[0262] In aspect 154, alternatively or in addition to one or more of aspects 1 to 153, in response to detecting a canceled repetition of the uplink transmission, a DMRS sharing pattern is re-determined; and the re-determined DMRS sharing pattern is applied to the remaining repetitions.

[0263] In aspect one hundred and fifty-fifth, alternatively or in addition to one or more of aspects one to one hundred and fifty-four, the one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

[0264] In aspect one hundred and fifty-six, alternatively or in addition to one or more of aspects one to one hundred and fifty-five, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0265] In the one hundred and fifty-seventh aspect, alternatively or in addition to one or more of the first to one hundred and fifty-sixth aspects, the DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0266] In aspect one hundred and fifty-eight, alternatively or in addition to one or more of aspects one to one hundred and fifty-seven, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0267] In aspect 159, alternatively or in addition to one or more of aspects 1 to 158, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0268] In a one-hundred and sixty-second aspect, alternatively or in addition to one or more of aspects one to one-hundred and fifty-ninths, an apparatus is according to any combination of aspects one to one-hundred and fifty-ninths.

[0269] In one hundred and sixty-first aspect, alternatively or in addition to one or more of the first to one hundred and sixty aspects, a wireless communication method includes: receiving, by a user equipment (UE) device, control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns. The method also includes: transmitting an uplink transmission to a base station based on the DMRS sharing pattern, wherein the DMRS sharing pattern is selected from the one or more DMRS sharing patterns based on the one or more parameters of the uplink transmission.

[0270] In aspect one hundred and sixty-two, alternatively or in addition to one or more of aspects one to one hundred and sixty-one, the method includes: configuring the uplink transmission to include multiple uplink repetitions of the same uplink channel, and the DMRS sharing mode indicates the ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on DMRS.

[0271] In aspect one hundred and sixty-three, alternatively or in addition to one or more of aspects one to one hundred and sixty-two, the method includes: receiving a message from the base station scheduling the uplink transmission and including a configured number of repetitions of the uplink transmission, wherein the one or more parameters include the configured number of repetitions of the uplink transmission.

[0272] In a one hundred and sixty-fourth aspect, alternatively or in addition to one or more of aspects one to one hundred and sixty-three, the uplink transmission corresponds to a single physical uplink shared channel (PUSCH) transmission having repetitions spanning multiple symbols in one or more time slots.

[0273] In a one hundred and sixty-fifth aspect, alternatively or in addition to one or more of aspects one to one hundred and sixty-four, the method comprises repeating a DMRS sharing pattern over a repetition number of the configured uplink transmissions.

[0274] In aspect one hundred and sixty-six, alternatively or in addition to one or more of aspects one to one hundred and sixty-five, determining a DMRS sharing mode comprises selecting a DMRS sharing mode from among a plurality of DMRS sharing modes for a configured number of repetitions and a DMRS sharing factor for uplink transmission.

[0275] In a one-hundred and sixty-seventh aspect, alternatively or in addition to one or more of aspects one to one-hundred and sixty-six, the method includes: selecting a DMRS sharing mode from among a plurality of DMRS sharing modes.

[0276] In aspect 168, alternatively or in addition to one or more of aspects 1 to 167, the DMRS sharing mode is dynamically selected from the multiple DMRS sharing modes, or is indicated by a DMRS sharing configuration parameter indicated by the base station via radio resource control RRC configuration signaling, downlink control information DCI signaling, or media access control MAC control element MAC-CE signaling.

[0277] In aspect one hundred and sixty-ninth, alternatively or in addition to one or more of aspects one to one hundred and sixty-eight, the method includes: receiving an indication of a DMRS sharing factor from a base station.

[0278] In aspect 170, alternatively or in addition to one or more of aspects 1 to 169, a wireless communication method includes: transmitting, by a base station, control information to a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns. The method also includes: receiving an uplink transmission from the UE device according to the DMRS sharing pattern, wherein the DMRS sharing pattern is selected from the one or more DMRS sharing patterns based on the one or more parameters of the uplink transmission.

[0279] In one hundred and seventy-first aspect, alternatively or in addition to one or more of aspects one to one hundred and seventy, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing mode indicates an ordering of one or more uplink repetitions among the multiple uplink repetitions that include DMRS and one or more other uplink repetitions among the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

[0280] In aspect one hundred and seventy-second, alternatively or in addition to one or more of aspects one to one hundred and seventy-one, the one or more parameters of the uplink transmission include the number of DMRS symbols for each repetition of the configuration of the uplink transmission.

[0281] In aspect one hundred and seventy-third, alternatively or in addition to one or more of aspects one to one hundred and seventy-second, the number of DMRS sharing modes available for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0282] In a one-hundred and seventy-fourth aspect, alternatively or in addition to one or more of aspects one to one-hundred and seventy-three, a DMRS sharing factor for the uplink transmission indicated by the control information is based on the number of configured DMRS symbols.

[0283] In aspect 175, alternatively or in addition to one or more of aspects 1 to 174, an apparatus for wireless communication comprises: a memory and one or more processors coupled to the memory. The one or more processors are configured to: receive control information at a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; and initiate transmission of an uplink transmission to a base station according to the DMRS sharing pattern, wherein a DMRS sharing pattern is selected from one or more DMRS sharing patterns based on the one or more parameters of the uplink transmission.

[0284] In aspect one hundred and seventy-six, alternatively or in addition to one or more of aspects one to one hundred and seventy-five, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing mode indicates an ordering of one or more uplink repetitions of the multiple uplink repetitions that include DMRS with one or more other uplink repetitions of the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

[0285] In aspect one hundred and seventy-seven, alternatively or in addition to one or more of aspects one to one hundred and seventy-six, one or more processors are further configured to: determine a repetition type of the uplink transmission from a plurality of repetition types, and determine a DMRS sharing mode based on the repetition type.

[0286] In aspect one hundred and seventy-eight, alternatively or in addition to one or more of aspects one to one hundred and seventy-seven, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and wherein the one or more processors are further configured to report, by the UE device, to the base station a first capability of supporting DMRS sharing for the first repetition type and a second capability of supporting DMRS sharing for the second repetition type.

[0287] In aspect one hundred and seventy-nine, alternatively or in addition to one or more of aspects one to one hundred and seventy-eight, the one or more processors are further configured to detect a modified puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual number of repetitions less than the configured number.

[0288] In aspect one hundred and eighty, alternatively or in addition to one or more of aspects one to one hundred and seventy-nine, the one or more processors are further configured to: apply the DMRS sharing pattern to repetitions of the uplink transmission regardless of the actual number.

[0289] In the one hundred and eighty-first aspect, alternatively or in addition to one or more of the first to one hundred and eighty aspects, one or more processors are further configured to: in response to detecting a canceled repetition of the uplink transmission, redetermine the DMRS sharing pattern based on the actual number of repetitions; and apply the redetermined DMRS sharing pattern to the remaining repetitions of the uplink transmission.

[0290] In aspect 182, alternatively or in addition to one or more aspects from aspects 1 to 181, an apparatus for wireless communication includes a memory and one or more processors coupled to the memory, and is configured to: initiate transmission of control information from a base station to a user equipment (UE) device, wherein the control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing modes; and receive an uplink transmission from the UE device according to the DMRS sharing mode, wherein a DMRS sharing mode is selected from one or more DMRS sharing modes based on one or more parameters of the uplink transmission.

[0291] In aspect one hundred and eighty-third, alternatively or in addition to one or more of aspects one to one hundred and eighty-second, the uplink transmission comprises multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing mode indicates an ordering of one or more uplink repetitions of the multiple uplink repetitions that include DMRS with one or more other uplink repetitions of the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

[0292] In aspect 184, alternatively or in addition to one or more of aspects 1 to 183, the one or more processors are further configured to: determine a repetition type of the uplink transmission from multiple repetition types, and determine a DMRS sharing mode based on the repetition type.

[0293] In aspect 185, alternatively or in addition to one or more of aspects 1 to 184, the multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and also include a second repetition type associated with one or more repetitions per time slot, and wherein the one or more processors are further configured to: receive at the base station from the UE device a report of a first capability to support DMRS sharing for the first repetition type and a second capability to support DMRS sharing for the second repetition type.

[0294] In aspect one hundred and eighty-six, alternatively or in addition to one or more of aspects one to one hundred and eighty-five, the one or more processors are further configured to detect a modified puncturing event associated with a modification of the uplink transmission from a configured number of repetitions to an actual remaining number of repetitions less than the configured number.

[0295] In a one hundred and eighty-seventh aspect, alternatively or in addition to one or more of aspects one to one hundred and eighty-six, the DMRS sharing pattern is applied to the remaining repetitions of the uplink transmission regardless of the actual number.

[0296] In aspect one hundred and eighty-eight, alternatively or in addition to one or more of aspects one to one hundred and eighty-seven, in response to detecting a canceled repetition of the uplink transmission, a DMRS sharing pattern is re-determined; and the re-determined DMRS sharing pattern is applied to the remaining repetitions.

[0297] In aspect one hundred and eighty-ninth, alternatively or in addition to one or more of aspects one to one hundred and eighty-eight, the one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

[0298] In aspect one hundred and ninety, alternatively or in addition to one or more of aspects one to one hundred and eighty-nine, the number of DMRS sharing modes available for the uplink transmission or one or more of the DMRS sharing factors used for the uplink transmission is based on the actual number of DMRS symbols.

[0299] In aspect 191, alternatively or in addition to one or more of aspects 1 to 190, a method includes: communicating control information by a first device to a second device, the control information indicating a mapping of a transmission parameter to one or more DMRS sharing modes. The method also includes communicating a transmission by the first device to the second device according to the DMRS sharing mode, wherein a DMRS sharing mode is selected from the one or more DMRS sharing modes based on the one or more parameters of the transmission.

[0300] Those skilled in the art will appreciate that any of a variety of different technologies and techniques may be used to represent information and signals. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0301] The functional blocks and modules described herein (e.g., Figure 2 The functional blocks and modules in the system may include processors, electronic devices, hardware devices, electronic components, logic circuits, memories, software codes, firmware codes, etc., or any combination thereof. Figures 1 to 10 The related features may be implemented via dedicated processor circuits, via executable instructions, and / or a combination thereof.

[0302] Those skilled in the art will further appreciate that the various illustrative logical blocks, modules, circuits, and operations (e.g., Figure 7 and Figure 8 The logic blocks in the system) can be implemented as electronic hardware, computer software, or a combination of the two. In order to clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and operations have been generally described above according to their functions. Whether such functions are implemented as hardware or software depends on the specific application and the design constraints on the entire system. A skilled person can implement the described functions in different ways for each specific application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. Those skilled in the art will also readily recognize that the order or combination of components, methods, or interactions described herein are merely examples, and the components, methods, or interactions of various aspects of the present disclosure may be combined or performed in a manner different from that shown and described herein.

[0303] The various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices designed to perform the functions described herein, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration.

[0304] The operation of the method or process described herein can be directly embodied in hardware, a software module operated by a processor, or a combination of the two. The software module can reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Alternatively, the storage medium can be integrated into the processor. The processor and the storage medium can reside in an ASIC. The ASIC can reside in a user terminal. Alternatively, the processor and the storage medium can reside in a user terminal as discrete components.

[0305] In one or more exemplary designs, the functions described may be implemented with hardware, software, firmware, or any combination thereof. If implemented with software, these functions may be stored or sent as one or more instructions or codes on a computer-readable medium. Computer-readable media include both computer storage media and communication media including any media that facilitates transferring a computer program from one place to another. Computer-readable storage media may be any available medium that can be accessed by a general or special-purpose computer. As an example and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM, or other optical disk storage, disk storage, or other magnetic storage devices, or may be used to carry or store desired program code components in the form of instructions or data structures and any other medium that can be accessed by a general or special-purpose computer or a general or special-purpose processor. The disk and dish used herein include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), hard disks, solid-state disks, and blue-ray disks, wherein the disks generally reproduce data magnetically, and the dish reproduces data optically with lasers. The above combination should also be included in the scope of computer-readable media.

[0306] As used herein, including in the claims, the term "and / or," when used in a list of two or more items, means that any one of the listed items may be taken alone, or any combination of two or more of the listed items may be used. For example, if a composition is described as comprising components A, B, and / or C, the composition may comprise only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Furthermore, as used herein, including in the claims, "or" used in a list of items beginning with "at least one" indicates a disjunctive list, so that, for example, a list of "at least one of A, B, or C" means any one of A or B or C or AB or AC or BC or ABC (i.e., A and B and C), or any combination thereof.

[0307] The foregoing description of the present disclosure is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples and designs described herein, but to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication by a user equipment UE, comprising: receiving control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; as well as An uplink transmission is sent according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes according to one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes based on the configured number of repetitions and the DMRS sharing factor of the uplink transmission.

2. The method according to claim 1, wherein: The uplink transmission includes multiple uplink repetitions of an uplink channel, and wherein the DMRS sharing pattern indicates an ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and will be demodulated according to the DMRS.

3. The method according to claim 1, further comprising: A message scheduling an uplink transmission and indicating a configured number of repetitions for the uplink transmission is received, wherein the one or more parameters include the configured number of repetitions for the uplink transmission.

4. The method according to claim 3, wherein: The uplink transmission corresponds to a single Physical Uplink Shared Channel (PUSCH) transmission with repetitions spanning multiple symbols in one or more time slots.

5. The method according to claim 1, further comprising: The DMRS sharing pattern is repeated over the configured number of repetitions of uplink transmissions.

6. The method according to claim 1, wherein: The DMRS sharing mode is dynamically selected from a plurality of DMRS sharing modes.

7. The method according to claim 1, further comprising: An indication of a DMRS sharing factor is received.

8. A method for wireless communication by a base station, comprising: Sending control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; as well as An uplink transmission is received according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes according to one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes based on a configured number of repetitions and a DMRS sharing factor of the uplink transmission.

9. The method according to claim 8, wherein: The uplink transmission includes multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing pattern indicates an ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS with one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

10. The method according to claim 8, wherein: The one or more parameters of the uplink transmission include a number of configured DMRS symbols for each repetition of the uplink transmission.

11. The method according to claim 10, wherein: The number of DMRS sharing patterns available for uplink transmission indicated by the control information is associated with the number of configured DMRS symbols.

12. The method according to claim 10, wherein: The DMRS sharing factor for the uplink transmission indicated by the control information is associated with the number of configured DMRS symbols.

13. An apparatus for wireless communication at a user equipment UE, comprising: Memory; and One or more processors, coupled to the memory and configured to: receiving control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; and An uplink transmission is sent according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes according to one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes based on the configured number of repetitions and the DMRS sharing factor of the uplink transmission.

14. The device according to claim 13, wherein: The uplink transmission includes multiple uplink repetitions of an uplink channel, and wherein the DMRS sharing pattern indicates an ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS and one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and will be demodulated according to the DMRS.

15. The device according to claim 13, wherein: The one or more processors are further configured to select a repetition type for uplink transmission from among a plurality of repetition types, and select a DMRS sharing mode according to the repetition type.

16. The device according to claim 13, wherein: The multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and a second repetition type associated with one or more repetitions per time slot, and wherein the one or more processors are further configured to: report by the UE device to the base station a first capability of supporting DMRS sharing of the first repetition type and a second capability of supporting DMRS sharing of the second repetition type.

17. The device according to claim 13, wherein: The one or more processors are further configured to detect a puncturing event associated with an uplink transmission modification from a configured number of repetitions to an actual number of repetitions that is less than the configured number.

18. The device according to claim 17, wherein: The one or more processors are further configured to apply the DMRS sharing pattern to repetitions of the uplink transmission regardless of an actual number.

19. The device according to claim 18, wherein: The one or more processors are further configured to: In response to detecting the cancelled repetition of the uplink transmission, re-determining the DMRS sharing pattern according to the actual number of repetitions; and The re-determined DMRS sharing pattern is applied to the remaining repetitions of uplink transmission.

20. The device according to claim 13, wherein: The memory is configured to store a plurality of DMRS sharing patterns including the one or more DMRS sharing patterns, and is further configured to store the uplink transmission parameters, and wherein the one or more processors are further configured to: prior to sending the uplink transmission, identifying that the uplink transmission is associated with the one or more parameters; identifying a DMRS sharing pattern from among the plurality of DMRS sharing patterns by using the one or more parameters as a lookup for the plurality of DMRS sharing patterns; and Based on the identification of the DMRS sharing mode, a DMRS sharing mode for the uplink transmission is selected.

21. The device according to claim 13, wherein: The one or more processors are further configured to: The DMRS sharing mode is selected according to the control information without explicit indication of the DMRS sharing mode from the base station.

22. An apparatus for wireless communication at a base station, comprising: Memory; as well as One or more processors, coupled to the memory and configured to: Sending control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; and An uplink transmission is received from a UE device according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes according to one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes based on a configured number of repetitions and a DMRS sharing factor of the uplink transmission.

23. The device according to claim 22, wherein: The uplink transmission includes multiple uplink repetitions of the same uplink channel, and wherein the DMRS sharing pattern indicates an ordering of one or more uplink repetitions in the multiple uplink repetitions that include DMRS with one or more other uplink repetitions in the multiple uplink repetitions of the uplink channel that do not include DMRS and are to be demodulated based on the DMRS.

24. The device according to claim 22, wherein: The one or more processors are further configured to determine a repetition type for uplink transmission from among a plurality of repetition types, and determine a DMRS sharing pattern according to the repetition type.

25. The device according to claim 22, wherein: The multiple repetition types include a first repetition type associated with a maximum of one repetition per time slot, and a second repetition type associated with one or more repetitions per time slot, and wherein the one or more processors are further configured to: receive at the base station a report of a first capability to support DMRS sharing of the first repetition type and a second capability to support DMRS sharing of the second repetition type.

26. The device according to claim 24, wherein: The one or more processors are further configured to detect a puncturing event associated with an uplink transmission modification from a configured number of repetitions to an actual remaining number of repetitions that is less than the configured number.

27. The device according to claim 26, wherein: The DMRS sharing pattern is applied to the remaining repetitions of the uplink transmission regardless of the actual number.

28. The device according to claim 26, wherein In response to detecting the cancelled repetition of the uplink transmission, a DMRS sharing pattern is re-determined, and wherein the re-determined DMRS sharing pattern is applied to remaining repetitions of the uplink transmission.

29. The device according to claim 22, wherein: The one or more parameters of the uplink transmission include an actual number of DMRS symbols for each repetition of the uplink transmission.

30. The device according to claim 29, wherein: One or more of the multiple DMRS sharing patterns available for uplink transmission or the DMRS sharing factors used for uplink transmission are associated with the actual number of DMRS symbols.

31. An apparatus for wireless communication by a user equipment UE, comprising: means for receiving control information indicating a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; as well as A component for sending an uplink transmission according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes according to one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes for a configured number of repetitions and a DMRS sharing factor for the uplink transmission.

32. An apparatus for wireless communication by a base station, comprising: means for sending control information, wherein the control information indicates a mapping of uplink transmission parameters to one or more demodulation reference signal (DMRS) sharing patterns; and A component for receiving an uplink transmission according to a DMRS sharing mode, wherein the DMRS sharing mode is selected from one or more DMRS sharing modes based on one or more parameters of the uplink transmission, wherein selecting the DMRS sharing mode includes selecting the DMRS sharing mode from multiple DMRS sharing modes for a configured number of repetitions and a DMRS sharing factor for the uplink transmission.

33. A non-transitory computer storage medium storing instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 1-12.

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