DMRS for full-duplex communication

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a base station (BS) may identify a conflict between a data transmission and a demodulation reference signal (DMRS) transmission in full-duplex time-frequency resources. The BS may send an indication of a time-frequency mapping for a zero-power DMRS (ZP-DMRS) in full-duplex time-frequency resources to a wireless communication device. The time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in full-duplex time-frequency resources are the same time-frequency mapping. A number of other aspects are provided.

Description

Technical Field

[0001] The technical aspects described below relate generally to wireless communications and to techniques and apparatus for full-duplex communications using a demodulation reference signal (DMRS).Some techniques and apparatus described herein enable and provide wireless communication devices and systems configured for low latency scenarios and increased throughput. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0003] A wireless communication network may include multiple base stations (BS) that may support communication of multiple user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, and uplinks (or reverse links) refer to the communication link from a UE to a BS. A BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0004] Multiple access technologies have been adopted in various telecommunication standards. Wireless communication standards provide common protocols to enable different devices (e.g., user equipment) to communicate at municipal, national, regional, and even global levels. New Radio (NR), also known as 5G, is an enhancement set of the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). As the demand for mobile broadband access continues to increase, further improvements in LTE and NR technologies are needed. These improvements can be applied to other multiple access technologies and telecommunication standards that adopt these technologies. Summary of the invention

[0005] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not an extensive overview of all expected features of the present disclosure, and is neither intended to identify key or important elements of all aspects of the present disclosure, nor to delineate the scope of any or all aspects of the present disclosure. The purpose of this summary is to present some concepts of one or more aspects of the present disclosure in an overview form, as a prelude to a more detailed description presented later.

[0006] A device included in a full-duplex deployment in a wireless network can send and / or receive various types of full-duplex transmissions, such as data transmission, demodulation reference signal (DMRS), etc. In some cases, a device can be scheduled to send data transmission in the same time-frequency resource as a DMRS transmission scheduled to be sent by another device to the device. In some cases, interference with DMRS transmission may occur when DMRS transmission and data transmission are sent in full-duplex (e.g., when DMRS transmission and data transmission occur in the same full-duplex time-frequency resource). In order to address such interference, one or more aspects described herein may include a device that can configure zero-power DMRS (ZP-DMRS) in the time-frequency resource where DMRS transmission is to occur (e.g., instead of data transmission to occur in the time-frequency resource). In this way, ZP-DMRS reduces or prevents interference with DMRS transmission, which improves DMRS-based channel estimation performance, improves signal reception and decoding performance, increases data throughput, etc. based at least in part on DMRS transmission.

[0007] In some aspects, a method of wireless communication performed by a base station (BS) may include: identifying a conflict between data transmission and DMRS transmission in full-duplex time-frequency resources; sending an indication of a time-frequency mapping for ZP-DMRS in the full-duplex time-frequency resources to a wireless communication device, wherein the time-frequency mapping for ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

[0008] In some aspects, a method of wireless communication performed by a wireless communication device may include: receiving an indication of a time-frequency mapping for a ZP-DMRS in full-duplex time-frequency resources from a BS and at least partially based on a conflict between the data transmission and a DMRS transmission in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping; and rate matching the data transmission at least partially based on the time-frequency mapping for the ZP-DMRS, or receiving the data transmission from the BS at least partially based on the data transmission being rate matched at least partially based on the time-frequency mapping for the ZP-DMRS.

[0009] In some aspects, a BS for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to: identify a conflict between a data transmission and a DMRS transmission in a full-duplex time-frequency resource; and send an indication of a time-frequency mapping for a ZP-DMRS in the full-duplex time-frequency resource to a wireless communication device, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping.

[0010] In some aspects, a wireless communication device for wireless communication may include a memory and one or more processors operably coupled to the memory. The memory and the one or more processors may be configured to: receive an indication of a time-frequency mapping for a ZP-DMRS in a full-duplex time-frequency resource from a BS and based at least in part on a conflict between a data transmission in the full-duplex time-frequency resource and a DMRS transmission, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; and rate match the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or receive the data transmission from the BS based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a wireless communication device, may cause the one or more processors to: identify a conflict between a data transmission and a DMRS transmission in a full-duplex time-frequency resource; and send an indication of a time-frequency mapping for a ZP-DMRS in the full-duplex time-frequency resource to the wireless communication device, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a wireless communication device, may cause the one or more processors to: receive an indication of a time-frequency mapping for a ZP-DMRS in full-duplex time-frequency resources from a BS and based at least in part on a conflict between a data transmission in the full-duplex time-frequency resources and a DMRS transmission, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping; and rate match the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or receive the data transmission from the BS based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

[0013] In some aspects, an apparatus for wireless communication may include: a component for identifying a conflict between data transmission and DMRS transmission in full-duplex time-frequency resources; and a component for sending an indication of a time-frequency mapping for ZP-DMRS in the full-duplex time-frequency resources to a wireless communication device, wherein the time-frequency mapping for ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

[0014] In some aspects, an apparatus for wireless communication may include: a component for receiving an indication of a time-frequency mapping for a ZP-DMRS in full-duplex time-frequency resources from a BS and based at least in part on a conflict between a data transmission and a DMRS transmission in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping; and a component for rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or a component for receiving the data transmission from the BS based at least in part on the time-frequency mapping for the ZP-DMRS being rate matched to a very small portion of the data transmission.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as generally described herein with reference to and illustrated by the accompanying figures and description.

[0016] The features and technical advantages of the examples according to the present disclosure have been outlined quite broadly above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures to carry out the same purposes as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, their organization and methods of operation, and associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for illustration and description purposes, and not as a definition of limitations of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Therefore, the above-mentioned features of the present disclosure can be understood in detail, and a more specific description is provided herein, wherein some aspects of the present disclosure are shown in the accompanying drawings. However, the accompanying drawings only illustrate some aspects of the present disclosure and therefore should not be considered as limiting the scope of the present disclosure. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with aspects of the present disclosure.

[0019] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a UE in a wireless communication network according to aspects of the present disclosure.

[0020] Figure 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network according to aspects of the present disclosure.

[0021] Figure 3B is a block diagram conceptually illustrating an example synchronous communication hierarchy in a wireless communication network in accordance with aspects of the present disclosure.

[0022] Figure 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix in accordance with aspects of the present disclosure.

[0023] Figures 5A-5C is a diagram illustrating an example of full-duplex communication in a wireless network in accordance with aspects of the present disclosure.

[0024] Fig. 6A , 6B and Figure 7 is a diagram illustrating an example of a demodulation reference signal (DMRS) for full-duplex communication according to aspects of the present disclosure.

[0025] Figure 8 is a diagram illustrating example processes performed, for example, by a BS, according to aspects of the present disclosure.

[0026] Fig. 9 is a diagram illustrating an example process, for example, performed by a wireless communication device, in accordance with aspects of the present disclosure. DETAILED DESCRIPTION

[0027] Various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms and should not be understood as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings of this article, those skilled in the art should understand that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of any other aspect of the present disclosure or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects stated herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods that are practiced using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the present disclosure stated herein. It should be understood that any aspect of the present disclosure disclosed herein can be embodied by one or more elements of the claims.

[0028] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements" or "features"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] Although some aspects may be described herein using terminology generally associated with 3G and / or 4G wireless technologies, aspects of the disclosure may be applied to other generation-based communication systems, such as 5G and higher, including NR technologies.

[0030] Although various aspects and embodiments 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 situations. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, embodiments and / or uses can be implemented via integrated chip embodiments 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 for use cases or applications, the wide applicability of the described innovations may occur. The scope of implementation 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 aspects of the described innovations. In some practical settings, the devices incorporating the described aspects and features may also necessarily include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including one or more antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). The innovations described herein are intended to be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of different sizes, shapes, and configurations.

[0031] Figure 11 is a diagram showing a wireless network 100 in which various aspects of the present disclosure may be practiced. The wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. The wireless network 100 may include a plurality of BSs 110 (shown as BSs 110a, BSs 110b, BSs 110c, and BSs 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) (e.g., using full-duplex communication, non-full-duplex communication, etc.), and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving this coverage area, depending on the context in which the term is used. In some aspects, the BS may configure one or more transmit power configurations for the UE for communicating with the BS using full-duplex communication, non-full-duplex communication, etc., as described herein.

[0032] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs with service subscriptions. Additionally or alternatively, the BS may support access to unlicensed RF bands (e.g., Wi-Fi bands, etc.). A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown in , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0033] In some aspects, the cell may not necessarily be fixed, and the geographic area of ​​the cell may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, and / or similar interfaces using any suitable transport networks). In other cases, the BSs may be implemented in a software defined network (SDN) manner or via a network function virtualization (NFV) manner.

[0034] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in FIG. 1 , a relay station 110 d may communicate with a macro BS 110 a and a UE 120 d to facilitate communication between the BS 110 a and the UE 120 d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0035] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0036] A network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0037] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be fixed or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle-mounted component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a robot, a drone, an implantable device, an augmented reality device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0038] Some UEs may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, positioning tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. For example, a wireless node may provide connectivity to a network or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, etc. These components may be integrated in various combinations and / or may be independent distributed components, taking into account design constraints and / or operational preferences.

[0039] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0040] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly (e.g., without using base station 110 as an intermediary for mutual communication) using one or more side link channels. For example, UE 120 can communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110. In these deployment scenarios, the UE performing scheduling operations may include or perform functions similar to those of a base station.

[0041] As indicated above, provide Figure 1 This is just an example. Other examples can be found in Figure 1 Different than described.

[0042] Figure 2 A block diagram of a design 200 of a base station 110 and a UE 120 is shown, which may be Figure 1 Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where generally T ≥ 1 and R ≥ 1. The T and R antennas may be configured with multiple antenna elements formed in an array for MIMO or massive MIMO deployments that may occur in millimeter wave (millimeter wave or mmW) communication systems.

[0043] At the base station 110, the transmit processor 220 may perform a number of functions associated with communication. For example, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, if applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, positioning coding may be used to generate synchronization signals to convey additional information.

[0044] At the UE 120, antennas 252a to 252r may receive downlink RF signals. The downlink RF signals may be received from one or more base stations 110 and / or may be sent by one or more base stations 110. The signals may be provided to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control information and system information to the controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0045] For uplink communications, the UE 120 may send control information and / or data to another device, such as one or more base stations 110. For example, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if applicable), further processed by the modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and sent to the base station 110. At base station 110, uplink signals from UE 120 and other UEs may be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide decoded data to data sink 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate to network controller via communication unit 244. Network controller 130 may include communication unit 294, controller / processor 290, and memory 292.

[0046] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of the base station 110 may perform one or more techniques associated with a demodulation reference signal (DMRS) for full-duplex communication, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Figure 8 The process of 800 Fig. 9 The operations of process 900 and / or other processes described herein may be performed. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink and / or uplink.

[0047] In some aspects, a wireless communication device (e.g., UE 120, BS 110, etc.) may include various components or elements for implementing communication functions. For example, the various components may include: a component for receiving an indication of a time-frequency mapping for a zero-power DMRS ZP-DMRS in a full-duplex time-frequency resource from the BS 110 and at least partially based on a conflict between a data transmission in the full-duplex time-frequency resource and a DMRS transmission, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; a component for rate matching a data transmission based at least partially on the time-frequency mapping for the ZP-DMRS; a component for receiving a data transmission from the BS based at least partially on the data transmission being rate matched based at least partially on the time-frequency mapping for the ZP-DMRS; and / or the like.

[0048] In some aspects, the base station 110 may include various components or elements for implementing communication functions. For example, the various components may include: components for identifying a conflict between a data transmission and a DMRS transmission in a full-duplex time-frequency resource; components for sending an indication of a time-frequency mapping for a ZP-DMRS in the full-duplex time-frequency resource to a wireless communication device, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for a DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; and / or the like.

[0049] In some aspects, the UE 120 may include various structural components for performing the functions of the various components. For example, the structural components for performing the functions of such components may include a combination of Figure 2One or more components of UE 120 are depicted, such as antenna 252, DEMOD 254, MOD 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, and the like.

[0050] In some aspects, base station 110 may include various structural components for performing the functions of the various components. For example, the structural components that perform the functions of such components may include a combination of Figure 2 One or more components of the base station 110 are depicted, such as a transmit processor 220, a TX MIMO processor 230, a DEMOD 232, a MOD 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, and the like.

[0051] As indicated above, provide Figure 2 This is just an example. Other examples can be found in Figure 2 Different than described.

[0052] Figure 3A An example frame structure 300 for frequency division duplex (FDD) in a telecommunication system (e.g., NR) is shown. The transmission timeline for each of the downlink and uplink may be divided into multiple units of radio frames (sometimes referred to as frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z ≥ 1) subframes (e.g., with indices from 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1 ms) and may include a set of time slots (e.g., Figure 3A Each subframe 2 is shown in m time slots, where m is the parameter set for transmission, such as 0, 1, 2, 3, 4, etc.). Each time slot may include a group of L symbol periods. For example, each time slot may include fourteen symbol periods (e.g., Figure 3A ), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two slots (e.g., when m=1), the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be assigned indices 0 to 2L–1. In some aspects, the scheduling unit for FDD may be frame-based, subframe-based, slot-based, symbol-based, etc.

[0053] Although some techniques are described herein in conjunction with frames, subframes, time slots, etc., these techniques may also be applied to other types of wireless communication structures, and terms other than "frames," "subframes," "time slots," etc. may be used to refer to these structures in 5G NR. In some aspects, a wireless communication structure may refer to a periodic, time-limited communication unit defined by a wireless communication standard and / or protocol. Additionally or alternatively, a wireless communication structure other than a frame may be used. Figure 3A The configuration of the wireless communication structure is shown.

[0054] In some telecommunications (e.g., NR), a base station may send synchronization signals. For example, a base station may send a primary synchronization signal (PSS), a secondary synchronization signal (SSS), etc. on the downlink for each cell supported by the base station. The PSS and SSS may be used by the UE for cell search and acquisition. For example, the PSS may be used by the UE to determine symbol timing, and the SSS may be used by the UE to determine the physical cell identifier and frame timing associated with the base station. The base station may also send a physical broadcast channel (PBCH). The PBCH may carry some system information, such as system information that supports initial access of the UE.

[0055] In some aspects, the base station may transmit the PSS, SSS, and / or PBCH according to a synchronization communication hierarchy (e.g., a synchronization signal (SS) hierarchy) including a plurality of synchronization communications (e.g., SS blocks), as described below in conjunction with Figure 3B described.

[0056] Figure 3B is a block diagram conceptually illustrating an example SS hierarchy as an example of a synchronous communication hierarchy. Figure 3B As shown, the SS hierarchy may include an SS burst set, which may include multiple SS bursts (identified as SS burst 0 to SS burst B-1, where B is the maximum number of repetitions of the SS burst that the base station can send). As further shown, each SS burst may include one or more SS blocks (identified as SS block 0 to SS block (b max_SS -1), where b max_SS -1 is the maximum number of SS blocks that can be carried by an SS burst). In some aspects, different SS blocks may be beamformed differently. Figure 3B As shown, the SS burst set may be sent by the wireless node periodically, such as every X milliseconds. In some aspects, the SS burst set may have a fixed or dynamic length, such as Figure 3B The Y milliseconds are shown in Figure 2.

[0057] Figure 3B The SS burst set shown in is an example of a synchronous communication set, and other synchronous communication sets can be used in conjunction with the techniques described herein. In addition, Figure 3BThe SS blocks shown in are examples of synchronous communications, and other synchronous communications may be used in conjunction with the techniques described herein.

[0058] In some aspects, an SS block includes resources and / or synchronization channels that carry PSS, SSS, PBCH, and / or other synchronization signals (e.g., a third synchronization signal (TSS)). In some aspects, multiple SS blocks are included in an SS burst, and the PSS, SSS, and / or PBCH may be the same in each SS block across the SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, the length of an SS block may be at least four symbol periods, with each symbol carrying one or more of a PSS (e.g., occupying one symbol), a SSS (e.g., occupying one symbol), and / or a PBCH (e.g., occupying two symbols).

[0059] In some aspects, the symbols of the SS blocks are consecutive, such as Figure 3B In some aspects, the symbols of the SS blocks are non-contiguous. Similarly, in some aspects, one or more SS blocks of an SS burst may be sent in contiguous radio resources (e.g., contiguous symbol periods) during one or more time slots. Additionally or alternatively, one or more SS blocks of an SS burst may be sent in non-contiguous radio resources.

[0060] In some aspects, an SS burst may have a burst periodicity, whereby an SS block of an SS burst is sent by a base station according to the burst periodicity. In other words, an SS block may be repeated during each SS burst. In some aspects, an SS burst set may have a burst set periodicity, whereby an SS burst of an SS burst set is sent by a base station according to a fixed burst set periodicity. In other words, an SS burst may be repeated during each SS burst set.

[0061] The base station may send system information, such as system information blocks (SIBs), on a physical downlink shared channel (PDSCH) in certain time slots. The base station may send control information / data on a physical downlink control channel (PDCCH) within C symbol periods of a time slot, where B is configurable for each time slot. The base station may send traffic data and / or other data on the PDSCH in the remaining symbol periods of each time slot.

[0062] As indicated above, provide Figure 3A and Figure 3B As an example. Other examples can be related to Figure 3A and Figure 3B Different than described.

[0063] Figure 4An example slot format 410 with a normal cyclic prefix is ​​shown. Available time-frequency resources may be partitioned into resource blocks. Each resource block may cover a set of subcarriers (e.g., 12 subcarriers) in a slot and may include multiple resource elements. Each resource element may cover a subcarrier in a symbol period (e.g., in time) and may be used to send a modulation symbol, which may be real or complex valued.

[0064] In some telecommunication systems (e.g., NR), an interlaced structure may be used for each of the downlink and uplink of FDD. For example, Q interlaces indexed from 0 to Q–1 may be defined, where Q may be equal to 4, 6, 8, 10, or some other value. Each interlace may include slots spaced Q frames apart. In particular, interlace q may include slots q, q+Q, q+2Q, etc., where q∈{0,…,Q–1}.

[0065] A UE may be located within the coverage of multiple BSs. One of these BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria, such as received signal strength, received signal quality, path loss, etc. Received signal quality may be quantified by a signal-to-noise-interference ratio (SINR), or a reference signal received quality (RSRQ), or some other metric. A UE may operate in a dominant interference scenario, where the UE may observe high interference from one or more interfering BSs.

[0066] Although aspects of the examples described herein may be associated with NR or 5G technology, aspects of the present disclosure may be applicable to other wireless communication systems. New Radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., different from an air interface based on Orthogonal Frequency Division Multiple Access (OFDMA)) or a fixed transport layer (e.g., different from Internet Protocol (IP)). In various aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and / or SC-FDM on the uplink, may utilize CP-OFDM on the downlink, and include support for half-duplex operation using TDD. In various aspects, for example, NR may utilize OFDM with CP (referred to herein as CP-OFDM) and / or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink, and include support for half-duplex operation using TDD. NR may include enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) targeting high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (mMTC) targeting non-backward compatible MTC technologies, and / or mission critical services targeting ultra-reliable low latency communications (URLLC) services.

[0067] In some aspects, a single component carrier bandwidth of 100 MHz may be supported. NR resource blocks may span 12 subcarriers in a duration of 0.1 milliseconds (ms), with a subcarrier bandwidth of 60 or 120 kilohertz (kHz). Each radio frame may include 40 time slots and may have a length of 10 ms. Thus, each time slot may have a length of 0.25 ms. Each time slot may indicate a link direction (e.g., DL or UL) for data transmission, and the link direction of each time slot may be switched dynamically. Each time slot may include DL / UL data and DL / UL control data.

[0068] Beamforming can be supported, and the beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. MIMO configuration in DL can support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission of up to 2 streams per UE can be supported. Aggregation of multiple cells can be supported with up to 8 serving cells. Alternatively, NR can support different air interfaces instead of OFDM-based interfaces. NR networks can include entities such as central units or distributed units.

[0069] As indicated above, provide Figure 4 As an example. Other examples can be related to Figure 4 Different than described.

[0070] 5G wireless networks are designed to provide high data rates and support a wide range of application scenarios. Wireless full-duplex communication is a technology designed to increase link capacity and / or reduce latency for time-critical services in 5G wireless networks (and / or other types of wireless networks). Full-duplex communication enables wireless communication devices to simultaneously transmit and receive in the same frequency domain resources and time domain resources. This is in contrast to conventional half-duplex communication (and / or other types of non-full-duplex communication) where transmission and reception are different in time and / or frequency.

[0071] Figures 5A-5C is a diagram illustrating an example 500 of full-duplex communication in a wireless network, such as wireless network 100. For example, Figures 5A-5C Various example full-duplex deployment scenarios are shown in which some aspects described herein may be implemented.

[0072] Figure 5A A first example full-duplex deployment scenario is shown in which some aspects described herein may be implemented. In this first example scenario, uplink (UL) and downlink (DL) communications between a BS (e.g., BS 110) and a plurality of UEs (e.g., UE 120, referred to as UE1 and UE2 in this first example) may include full-duplex communications. For example, UE1 may send UL communications to the BS, and the BS may send DL communications to UE2 in the same time-frequency resources.

[0073] Figure 5B A second example deployment scenario is shown in which some aspects described herein may be implemented. The second example scenario may include a full-duplex integrated access and backhaul (IAB) deployment. The IAB deployment may include an IAB donor (which may include a BS connected to a wired backhaul in a wireless network) and one or more IAB nodes (which may include one or more BSs that are communicatively connected to the IAB donor via a backhaul link, connected to another IAB node via a backhaul link or a side link, or a combination thereof). The UE may communicate with the IAB donor or the IAB node via an access link.

[0074] In this second exemplary scenario, an IAB node (e.g., a first BS 110) may communicate with an IAB donor (e.g., a second BS 110) and a UE (e.g., UE 120). The IAB node may receive downlink communications from the IAB donor and may send uplink communications to the IAB donor. In addition, the IAB node may send downlink communications to the UE and may receive uplink communications from the UE. In some aspects, in the same time-frequency resources, full-duplex communications in an IAB deployment may include uplink communications and downlink communications between an IAB donor and an IAB node. In some aspects, in the same time-frequency resources, full-duplex communications in an IAB deployment may include uplink communications and downlink communications between a UE and an IAB node. In some aspects, in the same time-frequency resources, full-duplex communications in an IAB deployment may include downlink communications between an IAB donor and an IAB node, and downlink communications between a UE and an IAB node. In some aspects, full-duplex communications in an IAB deployment may include uplink communications between an IAB donor and an IAB node, and uplink communications between a UE and an IAB node in the same time-frequency resources.

[0075] Figure 5C A third example deployment scenario is shown in which some aspects described herein may be implemented. The third example scenario may include a full-duplex IAB deployment. In this third example scenario, a parent IAB node (e.g., first BS 110) may communicate with an IAB node (e.g., second BS 110), and the IAB node may communicate with a UE (e.g., UE 120) and a child IAB node. The parent IAB node may be upstream of an IAB donor relative to the IAB node, and the child IAB node may be downstream of the IAB donor relative to the IAB node.

[0076] In some aspects, full-duplex communication in an IAB deployment may include uplink communication and downlink communication between a parent IAB node and an IAB node in the same time-frequency resource. In some aspects, full-duplex communication in an IAB deployment may include uplink communication and downlink communication between an IAB node and a child IAB node in the same time-frequency resource. In some aspects, full-duplex communication in an IAB deployment may include uplink communication and downlink communication between a UE and an IAB node in the same time-frequency resource.

[0077] In some aspects, full-duplex communication in an IAB deployment may include downlink communication between a parent IAB node and an IAB node, and downlink communication between a UE and an IAB node in the same time-frequency resource. In some aspects, full-duplex communication in an IAB deployment may include uplink communication between a parent IAB node and an IAB node, and uplink communication between a UE and an IAB node in the same time-frequency resource.

[0078] In some aspects, full-duplex communication in an IAB deployment may include downlink communication between a parent IAB node and an IAB node, and downlink communication between an IAB node and a child IAB node in the same time-frequency resource. In some aspects, full-duplex communication in an IAB deployment may include uplink communication between a parent IAB node and an IAB node, and uplink communication between an IAB node and a child IAB node in the same time-frequency resource.

[0079] In some aspects, full-duplex communication in an IAB deployment may include uplink communication between a UE and an IAB node, and downlink communication between an IAB node and a sub-IAB node in the same time-frequency resources. In some aspects, full-duplex communication in an IAB deployment may include downlink communication between a UE and an IAB node, and uplink communication between an IAB node and a sub-IAB node in the same time-frequency resources.

[0080] As indicated above, provide Figures 5A-5C As an example. Other examples can be related to Figures 5A-5C Different than described.

[0081] Devices included in a full-duplex deployment in a wireless network can send and / or receive various types of full-duplex transmissions, such as data transmissions, control transmissions, reference signal transmissions, etc. In some cases, a device may be scheduled to send data transmissions in the same time-frequency resources as a DMRS transmission scheduled to be sent by another device to the device. DMRS may include a reference signal that is sent to facilitate the receiver of the DMRS to demodulate and / or decode other communications received at the receiver. In some cases, interference with DMRS transmissions may occur when DMRS transmissions and data transmissions are sent in full-duplex (e.g., when DMRS transmissions and data transmissions occur in the same full-duplex time-frequency resources).

[0082] For example, in the case where a first wireless communication device (e.g., UE, another BS, IAB node, IAB donor, etc.) sends an uplink DMRS transmission to a BS (or IAB node), and the BS (or IAB node) sends a downlink data transmission to a second wireless communication device (e.g., UE, another BS, IAB node, IAB donor, etc.), full-duplex transmission of the uplink DMRS transmission and the downlink data transmission may cause self-interference at the BS. The transmission power of the downlink data transmission may in turn cause interference to the reception of the uplink DMRS transmission at the BS, which may be referred to as self-interference. Such self-interference at the BS may degrade the DMRS-based channel estimation performance of the DMRS received at the BS. Similar self-interference may occur for a full-duplex capable UE that communicates with one or more BSs or IAB nodes in a full-duplex manner.

[0083] As another example, wireless communication devices (e.g., UEs, IAB nodes, antennas of the same BS, etc.) located close to each other may experience inter-device interference (e.g., inter-UE interference, inter-IAB node interference, inter-antenna interference, etc.), where a first wireless communication device sends an uplink data transmission to the BS and a second wireless communication device receives a downlink DMRS transmission from the BS. Due to the proximity of the first and second wireless communication devices, the uplink data transmission may cause the second wireless communication device to increase interference power, which may cause a reduction in DMRS-based channel estimation performance of the DMRS received at the second wireless communication device.

[0084] Some aspects described herein provide techniques and apparatus for DMRS for full-duplex communication. In some aspects, a wireless communication device (e.g., UE, BS, IAB node, etc.) may identify a conflict between data transmission and DMRS transmission in a full-duplex time-frequency resource. The wireless communication device may configure the ZP-DMRS based at least in part on identifying the conflict. The wireless communication device may configure the ZP-DMRS so that the time-frequency mapping for the ZP-DMRS is the same as the time-frequency mapping for DMRS transmission and data transmission. In other words, in symbols and subcarriers where data transmission and DMRS transmission conflict, the wireless communication device configures the ZP-DMRS to replace the data transmission in the symbols and subcarriers.

[0085] In this way, when rate matching and / or rate dematching is performed on data transmission, symbols and subcarriers occupied by ZP-DMRS are excluded, which reduces or prevents interference enhancement caused by simultaneous transmission and reception of data transmission and DMRS transmission, respectively. This reduces self-interference and / or inter-device interference, improves DMRS-based channel estimation performance based at least in part on DMRS transmission, improves signal reception and decoding performance, increases data throughput, etc.

[0086] Fig. 6A and Figure 6B 6 is a diagram illustrating an example 600 of a DMRS for full-duplex communication according to aspects of the present disclosure. Fig. 6A As shown in , example 600 may include communications between a BS (eg, BS 110 ) and a plurality of wireless communication devices (eg, UE 120 , BS 110 , etc.), such as wireless communication device 1 and wireless communication device 2 .

[0087] In some aspects, the BS and multiple wireless communication devices may be included in a full-duplex deployment, such as described above. Figures 5A-5C One or more of the exemplary full-duplex deployment scenarios shown in and / or other full-duplex deployment scenarios. For example, wireless communication device 1 and wireless communication device 2 may each be a UE communicating with a BS (e.g., Figure 5A As another example, the BS may be an IAB node, the wireless communication device 1 may be an IAB donor or another IAB node (e.g., a parent IAB node or a child IAB node) implemented by another BS, and the wireless communication device 2 may be a UE (e.g., Figure 5B or Figure 5C As another example, the BS may be an IAB node, the wireless communication device 1 may be a UE, and the wireless communication device 2 may be an IAB donor or another IAB node (eg, a parent IAB node or a child IAB node) implemented by another BS (eg, as shown in Figure 5B or Figure 5C As another example, the BS may be an IAB node, and the wireless communication device 1 may be an IAB donor or another IAB node (eg, a parent IAB node or a child IAB node) implemented by another BS (eg, as shown in Figure 5C ), and the wireless communication device 2 may be an IAB donor or another IAB node (eg, a parent IAB node or a child IAB node) implemented by another BS (eg, as shown in Figure 5C ).

[0088] In some aspects, the BS and multiple wireless communication devices may communicate using full-duplex and non-full-duplex communications (such as half-duplex and / or other types of non-full-duplex communications). In some aspects, the BS and multiple wireless communication devices may send and / or receive data transmissions (e.g., downlink or PDSCH data transmissions and / or uplink or physical uplink shared channel (PUSCH) data transmissions) and / or control communications (e.g., downlink or PDCCH control transmissions and / or uplink or PUCCH control transmissions). In some aspects, the BS and multiple wireless communication devices may send and / or receive one or more types of reference signals, such as CSI-RS, DMRS, etc.

[0089] In some aspects, the BS can be used as a scheduling entity for multiple wireless communication devices. In this case, the BS can schedule full-duplex and non-full-duplex communications between the BS and the multiple wireless communication devices.

[0090] like Fig. 6A As shown by reference numeral 602, as part of scheduling full-duplex communication between the BS and multiple wireless communication devices, the BS can identify one or more conflicts between data transmission and DMRS transmission. In the case where the data transmission and DMRS transmission are scheduled to be sent on opposite links (e.g., uplink and downlink) and in the same time-frequency resources (e.g., in the same resource element or symbol / subcarrier combination in the time-frequency resources), conflicts between data transmission and DMRS transmission may occur. For example, the BS can identify a conflict between an uplink (or PUSCH) data transmission and a downlink (or PDSCH) DMRS transmission in a full-duplex time-frequency resource, and / or can identify a conflict between a downlink (or PDSCH) data transmission and an uplink (or PUSCH) DMRS transmission in a full-duplex time-frequency resource (e.g., a full-duplex time-frequency resource that is the same as the conflict between the uplink data transmission and the downlink DMRS transmission and / or another full-duplex time-frequency resource).

[0091] like Fig. 6A As further shown by reference numeral 604, the BS may determine a time-frequency mapping for an uplink (or PUSCH) ZP-DMRS (e.g., based at least in part on detecting a conflict between an uplink data transmission and a downlink DMRS transmission) and / or a time-frequency mapping for a downlink (or PDSCH) ZP-DMRS (e.g., based at least in part on detecting a conflict between a downlink data transmission and an uplink DMRS transmission). The time-frequency mapping for the uplink ZP-DMRS may be the same as the time-frequency mapping for the downlink DMRS, and the time-frequency mapping for the downlink ZP-DMRS may be the same as the time-frequency mapping for the uplink DMRS. The time-frequency mapping for the uplink ZP-DMRS may indicate or specify the resource elements or symbol / subcarrier combinations to which the uplink ZP-DMRS is mapped. Similarly, the time-frequency mapping for the downlink ZP-DMRS may indicate or specify the resource elements or symbol / subcarrier combinations to which the downlink ZP-DMRS is mapped.

[0092] As indicated above, the conflict between data transmission and DMRS transmission may cause interference to DMRS transmission and degraded channel estimation performance based at least in part on DMRS transmission. Therefore, in the resource elements or symbol / subcarrier combinations where uplink data transmission conflicts with downlink DMRS transmission, the BS may replace uplink data transmission with uplink ZP-DMRS. In addition, in the resource elements or symbol / subcarrier combinations where downlink data transmission conflicts with uplink DMRS transmission, the BS may replace downlink data transmission with downlink ZP-DMRS.

[0093] ZP-DMRS can be a "zero power" DMRS, because ZP-DMRS is configured with zero transmit power, so that the transmitter of ZP-DMRS avoids transmitting in the resource elements or symbol / subcarrier combinations to which ZP-DMRS is mapped. Therefore, when ZP-DMRS is mapped to the same resource elements or symbol / subcarrier combinations as DMRS transmission in full-duplex time-frequency resources, ZP-DMRS replaces the data transmission that would otherwise conflict with the DMRS transmission, and the "zero power" of ZP-DMRS reduces or prevents interference to DMRS transmission that would otherwise be caused by data transmission.

[0094] In some aspects, the BS may determine the time-frequency mapping for the uplink ZP-DMRS based at least in part on detecting a conflict between an uplink data transmission and a downlink DMRS transmission, and / or may determine the time-frequency mapping for the downlink ZP-DMRS based at least in part on detecting a conflict between a downlink data transmission and an uplink DMRS transmission. In some aspects, the BS may determine the time-frequency mapping for the uplink ZP-DMRS based at least in part on determining that a conflict between an uplink data transmission and a downlink DMRS transmission will produce interference that satisfies an interference threshold, and / or may determine the time-frequency mapping for the downlink ZP-DMRS based at least in part on determining that a conflict between a downlink data transmission and an uplink DMRS transmission will produce interference that satisfies the same interference threshold or a different interference threshold. The interference threshold may include a self-interference threshold, an inter-device interference threshold, a signal-to-interference-plus-noise ratio (SINR) threshold, and / or another type of interference threshold.

[0095] like Fig. 6AAs further shown by reference numeral 606, the BS may send an indication of a time-frequency mapping for the downlink ZP-DMRS (reference numeral 606-1) to wireless communication device 1, and / or may send an indication of a time-frequency mapping for the uplink ZP-DMRS (reference numeral 606-2) to wireless communication device 2. In this manner, wireless communication device 1 may rate dematch downlink data transmission based at least in part on the indication of the time-frequency mapping for the downlink ZP-DMRS, and / or wireless communication device 2 may rate match uplink data transmission based at least in part on the indication of the time-frequency mapping for the uplink ZP-DMRS.

[0096] In some aspects, the BS may send an indication of time-frequency mapping for the ZP-DMRS (e.g., downlink ZP-DMRS and / or uplink ZP-DMRS) in one or more signaling communications, such as one or more radio resource control (RRC) communications, one or more media access control (MAC) control element (MAC-CE) communications, one or more downlink control information (DCI) communications, and the like.

[0097] In some aspects, the indication of the time-frequency mapping for the ZP-DMRS may identify the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped. For example, the indication of the time-frequency mapping for the ZP-DMRS may identify a symbol index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, may identify a resource block index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, may identify a resource element index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, and the like.

[0098] In some aspects, the indication of the time-frequency mapping for the ZP-DMRS may include a bitmap indicating the respective positions of the resource elements or symbol / subcarrier combinations to which the ZP-DMRS is mapped. The length of the bitmap may be based at least in part on the number of symbols included in a physical channel for data transmission associated with the ZP-DMRS, may be based at least in part on the number of physical resource blocks included in the physical channel for data transmission associated with the ZP-DMRS, may be based at least in part on the number of resource elements included in the physical channel for data transmission associated with the ZP-DMRS or the number of resource elements included in one physical resource block, etc.

[0099] In some aspects, an indication of a time-frequency mapping for a ZP-DMRS may be included in a DMRS configuration having a format identical to that of a DMRS configuration for a DMRS transmission that conflicts with a data transmission associated with the ZP-DMRS. For example, an indication of a time-frequency mapping for an uplink ZP-DMRS may be included in a DMRS configuration for a downlink DMRS transmission that conflicts with an uplink data transmission. As another example, an indication of a time-frequency mapping for a downlink ZP-DMRS may be included in a DMRS configuration having a format identical to that of a DMRS configuration for an uplink DMRS transmission that conflicts with a downlink data transmission. In this case, since the time-frequency mapping for the ZP-DMRS is identical to the time-frequency mapping for the DMRS transmission, the BS may send or forward the DMRS configuration for the DMRS transmission as an indication of the time-frequency mapping for the ZP-DMRS.

[0100] Therefore, the BS can send or forward an indication of the DMRS configuration for uplink DMRS transmission to the wireless communication device 1, which can serve as an indication of the time-frequency mapping for the downlink ZP-DMRS. Similarly, the BS can send or forward an indication of the DMRS configuration for downlink DMRS transmission to the wireless communication device 2, which can serve as an indication of the time-frequency mapping for the uplink ZP-DMRS.

[0101] In some aspects, the BS may send an indication of a time-frequency mapping for the ZP-DMRS in multiple signaling communications. For example, the BS may send an indication of multiple candidate time-frequency mappings for the ZP-DMRS in a static signaling communication (e.g., an RRC communication) or a semi-static signaling communication (e.g., a MAC-CE communication), and may send a dynamic signaling communication (e.g., a DCI communication) that identifies or selects a time-frequency mapping for the ZP-DMRS from multiple candidate time-frequency mappings by indexing into the multiple candidate time-frequency mappings.

[0102] As another example, the BS may send an indication of multiple candidate DMRS configurations for ZP-DMRS in static signaling communication (e.g., RRC communication) or semi-static signaling communication (e.g., MAC-CE communication), and may send dynamic signaling communication (e.g., DCI communication) that identifies or selects a DMRS configuration for ZP-DMRS from multiple candidate DMRS configurations by indexing into the multiple candidate DMRS configurations.

[0103] As another example, the BS may send an indication of a first subset of parameters for the DMRS configuration for the ZP-DMRS in a static signaling communication (e.g., RRC communication) or a semi-static signaling communication (e.g., MAC-CE communication), and may send a dynamic signaling communication (e.g., DCI communication) identifying a second subset of parameters for the DMRS configuration for the ZP-DMRS.

[0104] like Fig. 6A As further shown by reference numeral 608, the BS and multiple wireless communication devices can perform full-duplex communication based at least in part on the time-frequency mapping for the downlink ZP-DMRS and / or the time-frequency mapping for the uplink ZP-DMRS. For example, the BS can rate match downlink data transmissions and send downlink data transmissions based at least in part on the time-frequency mapping for the downlink ZP-DMRS (reference numeral 608-1). As another example, wireless communication device 2 can receive an indication of the time-frequency mapping for the uplink ZP-DMRS, and can rate match uplink data transmissions and send uplink transmissions based at least in part on the time-frequency mapping for the uplink ZP-DMRS (reference numeral 608-2).

[0105] In some aspects, the BS and / or wireless communication device 2 may rate match the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS by excluding from the data transmission one or more resource elements or symbol / subcarrier combinations included in the full-duplex time-frequency resources and indicated by the time-frequency mapping. In order to exclude one or more resource elements or symbol / subcarrier combinations, the BS and / or wireless communication device 2 may determine the rate matching output length for the data transmission based at least in part on avoiding mapping the coded bits associated with the ZP-DMRS to the one or more resource elements or symbol / subcarrier combinations. In this way, for the ZP-DMRS in one or more resource elements or symbol / subcarrier combinations, the transmit power is configured to be equal to or close to zero transmit power.

[0106] To determine the rate matching output length, the BS and / or wireless communication device 2 may subtract the number of resource elements or symbol / subcarrier combinations from the total number of resource elements or symbol / subcarrier combinations in the full-duplex time-frequency resources, multiply the remaining resource elements or symbol / subcarrier combinations by the modulation order used for data transmission (e.g., 2 for binary phase shift keying (BPSK), 4 for 16 quadrature amplitude modulation (16QAM), 6 for 64 quadrature amplitude modulation (64QAM), 8 for 256 quadrature amplitude modulation (256QAM), 10 for 1024 quadrature amplitude modulation (1024QAM), 12 for 4096 quadrature amplitude modulation (4096QAM), etc.), and multiply the resulting product by the spatial multiplexing degree of data transmission.

[0107] like Fig. 6A As further shown by reference numeral 610, rate dematching can be performed on downlink data transmission and / or uplink data transmission. For example, the wireless communication device 1 can receive an indication of a time-frequency mapping for a downlink ZP-DMRS and a downlink data transmission, and can rate dematch the downlink data transmission based at least in part on the time-frequency mapping for the downlink ZP-DMRS (reference numeral 610-1). As another example, the BS can receive an uplink data transmission, and can rate dematch the uplink data transmission based at least in part on the time-frequency mapping for the uplink ZP-DMRS (reference numeral 610-2).

[0108] In some aspects, the BS and / or wireless communication device 1 may rate dematch the data transmission based at least in part on identifying one or more resource elements or symbol / subcarrier combinations that are included in the full-duplex time-frequency resources and indicated by the time-frequency mapping associated with the ZP-DMRS that have been excluded from the data transmission. In this case, the BS and / or wireless communication device 1 may determine the rate dematching output length for the data transmission based at least in part on avoiding mapping the coded bits associated with the ZP-DMRS to one or more resource elements or symbol / subcarrier combinations. In this way, for the ZP-DMRS in one or more resource elements or symbol / subcarrier combinations, the received power is configured to be equal to or close to zero received power.

[0109] To determine the rate dematching output length, the BS and / or wireless communication device 1 may subtract the number of resource elements or symbol / subcarrier combinations, multiply the remaining resource elements or symbol / subcarrier combinations by the modulation order used for data transmission (e.g., 2 for binary phase shift keying (BPSK), 4 for 16 quadrature amplitude modulation (16QAM), 6 for 64 quadrature amplitude modulation (64QAM), 8 for 256 quadrature amplitude modulation (256QAM), 10 for 1024 quadrature amplitude modulation (1024QAM), 12 for 4096 quadrature amplitude modulation (4096QAM), etc.), and multiply the resulting product by the spatial multiplexing degree of data transmission.

[0110] Figure 6B An example full-duplex physical resource block (PRB) is shown, in which the above combined Fig. 6A The technology described. Figure 6B The example full-duplex PRB shown in FIG. 1 may be an example of a full-duplex time-frequency resource. The techniques described above in conjunction with FIG. 1 may be implemented in other full-duplex PRBs and / or other full-duplex time-frequency resources.

[0111] like Figure 6BAs shown, the downlink configuration for a full-duplex PRB may include a front-loaded PDCCH transmission (e.g., symbols 0 and 1), a front-loaded PDSCH DMRS transmission (e.g., symbol 3), multiple other PDSCH DMRS transmissions (e.g., symbols 7 and 11), and downlink or PDSCH data transmissions (e.g., symbols 3-6, 8-10, 12, and 13). The uplink configuration for a full-duplex PRB may include a front-loaded PUCCH transmission (e.g., symbols 0 and 1), unused symbols (e.g., symbols 2 and 3), a front-loaded PUSCH DMRS transmission (e.g., symbol 4), another PUSCH DMRS transmission (e.g., symbol 12), and uplink or PUSCH data transmission (e.g., symbols 4-6, 8-10, 12, and 13).

[0112] like Figure 6B As further shown in , since the front-loaded PUSCH DMRS transmission is mapped to the same resource element or symbol / subcarrier combination in symbol 4 of a full-duplex PRB as part of downlink data transmission (which may be referred to as a collision), the resource element or symbol / subcarrier combination in symbol 4 of the downlink configuration for the full-duplex PRB may be replaced with a PDSCH ZP-DMRS. Similarly, since the PUSCH DMRS transmission is mapped to the same resource element or symbol / subcarrier combination in symbol 12 of a full-duplex PRB as part of downlink data transmission, the resource element or symbol / subcarrier combination in symbol 12 of the downlink configuration for the full-duplex PRB may be replaced with another PDSCH ZP-DMRS.

[0113] like Figure 6B As further shown in , since the PDSCH DMRS transmission is mapped to the same resource element or symbol / subcarrier combination in symbol 7 of a full-duplex PRB as part of an uplink data transmission, the resource element or symbol / subcarrier combination in symbol 7 of an uplink configuration for a full-duplex PRB may be replaced with a PDSCH ZP-DMRS. Similarly, since the PDSCH DMRS transmission is mapped to the same resource element or symbol / subcarrier combination in symbol 11 of a full-duplex PRB as part of an uplink data transmission, the resource element or symbol / subcarrier combination in symbol 11 of an uplink configuration for a full-duplex PRB may be replaced with another PUSCH ZP-DMRS.

[0114] In this way, the BS can identify the conflict between data transmission and DMRS transmission in full-duplex time-frequency resources. The BS can configure the ZP-DMRS based at least in part on the identification of the conflict. The BS can configure the ZP-DMRS so that the time-frequency mapping for the ZP-DMRS is the same as the time-frequency mapping for DMRS transmission and data transmission. In other words, in the symbols and subcarriers where the data transmission and DMRS transmission conflict, the BS configures the ZP-DMRS to replace the data transmission in the symbols and subcarriers. In this way, when rate matching and / or rate dematching are performed on the data transmission, the symbols and subcarriers occupied by the ZP-DMRS are excluded, which respectively reduces or prevents the power enhancement caused by the simultaneous transmission and reception of data transmission and DMRS transmission. This reduces self-interference and / or interference between devices, improves the channel estimation performance based on DMRS based at least in part on DMRS transmission, improves signal reception and decoding performance, increases data throughput, etc.

[0115] As shown above, providing Fig. 6A and Figure 6B As an example. Other examples can be related to Fig. 6A and Figure 6B Different than described.

[0116] Figure 7 7 is a diagram illustrating an example 700 of a DMRS for full-duplex communication according to aspects of the present disclosure. Figure 7 As shown in , example 700 may include communications between a BS (eg, BS 110) and a full-duplex enabled wireless communication device (eg, UE 120, BS 110, etc.).

[0117] In some aspects, the BS and the wireless communication device may be included in a full-duplex deployment, such as described above. Figures 5A-5C One or more of the example full-duplex deployment scenarios shown in and / or other full-duplex deployment scenarios. For example, the wireless communication device may be a full-duplex UE communicating with a BS (e.g., Figure 5B and / or Figure 5C As another example, the BS may be an IAB node, and the wireless communication device 1 may be an IAB donor or another IAB node (eg, a parent IAB node or a child IAB node) implemented by another BS (eg, as shown in FIG. 1 ). Figure 5B or Figure 5C ).

[0118] In some aspects, the BS and the wireless communication device may communicate using full-duplex and non-full-duplex communications (such as half-duplex and / or other types of non-full-duplex communications). In some aspects, the BS and the wireless communication device may send and / or receive data transmissions (e.g., downlink or PDSCH data transmissions and / or uplink or PUSCH data transmissions) and / or control communications (e.g., downlink or PDCCH control transmissions and / or uplink or PUSCH control transmissions). In some aspects, the BS and the wireless communication device may send and / or receive one or more types of reference signals, such as CSI-RS, DMRS, etc.

[0119] In some aspects, the BS can act as a scheduling entity for wireless communication devices. In this case, the BS can schedule full-duplex and non-full-duplex communications between the BS and the wireless communication devices.

[0120] like Figure 7 As indicated by reference numeral 702, as part of scheduling full-duplex communication between the BS and the wireless communication device, the BS may identify one or more conflicts between data transmissions and DMRS transmissions. For example, the BS may identify a conflict between an uplink (or PUSCH) data transmission and a downlink (or PDSCH) DMRS transmission in a full-duplex time-frequency resource, and / or may identify a conflict between a downlink (or PDSCH) data transmission and an uplink (or PUSCH) DMRS transmission in a full-duplex time-frequency resource (e.g., the same full-duplex time-frequency resource as the conflict between the uplink data transmission and the downlink DMRS transmission and / or another full-duplex time-frequency resource).

[0121] like Figure 7 As further shown by reference numeral 704, the BS may determine a time-frequency mapping for an uplink (or PUSCH) ZP-DMRS (e.g., based at least in part on detecting a conflict between an uplink data transmission and a downlink DMRS transmission) and / or a time-frequency mapping for a downlink (or PDSCH) ZP-DMRS (e.g., based at least in part on detecting a conflict between a downlink data transmission and an uplink DMRS transmission). The time-frequency mapping for the uplink ZP-DMRS may be the same as the time-frequency mapping for the downlink DMRS, and the time-frequency mapping for the downlink ZP-DMRS may be the same as the time-frequency mapping for the uplink DMRS. The time-frequency mapping for the uplink ZP-DMRS may indicate or specify the resource elements or symbol / subcarrier combinations to which the uplink ZP-DMRS is mapped. Similarly, the time-frequency mapping for the downlink ZP-DMRS may indicate or specify the resource elements or symbol / subcarrier combinations to which the downlink ZP-DMRS is mapped.

[0122] As indicated above, a conflict between a data transmission and a DMRS transmission may result in an increase in transmit power and / or receive power associated with the data transmission, which may result in interference with the DMRS transmission and degraded channel estimation performance based at least in part on the DMRS transmission. Therefore, in a resource element or symbol / subcarrier combination where an uplink data transmission conflicts with a downlink DMRS transmission, the BS may replace the uplink data transmission with an uplink ZP-DMRS. In addition, in a resource element or symbol / subcarrier combination where a downlink data transmission conflicts with an uplink DMRS transmission, the BS may replace the downlink data transmission with a downlink ZP-DMRS.

[0123] In some aspects, the BS may determine the time-frequency mapping for the uplink ZP-DMRS based at least in part on detecting a conflict between an uplink data transmission and a downlink DMRS transmission, and / or may determine the time-frequency mapping for the downlink ZP-DMRS based at least in part on detecting a conflict between a downlink data transmission and an uplink DMRS transmission. In some aspects, the BS may determine the time-frequency mapping for the uplink ZP-DMRS based at least in part on determining that a conflict between an uplink data transmission and a downlink DMRS transmission will produce interference that satisfies an interference threshold, and / or may determine the time-frequency mapping for the downlink ZP-DMRS based at least in part on determining that a conflict between a downlink data transmission and an uplink DMRS transmission will produce interference that satisfies the same interference threshold or a different interference threshold. The interference threshold may include a self-interference threshold, an inter-device interference threshold, a signal-to-interference-plus-noise ratio (SINR) threshold, and / or another type of interference threshold.

[0124] like Figure 7 As further indicated by reference numeral 706, the BS may send an indication of a time-frequency mapping for a downlink ZP-DMRS and / or an indication of a time-frequency mapping for an uplink ZP-DMRS to the wireless communication device. In this manner, the wireless communication device may rate dematch downlink data transmission based at least in part on the indication of the time-frequency mapping for the downlink ZP-DMRS and / or may rate match uplink data transmission based at least in part on the indication of the time-frequency mapping for the uplink ZP-DMRS.

[0125] In some aspects, the BS may send an indication of time-frequency mapping for ZP-DMRS (e.g., downlink ZP-DMRS and / or uplink ZP-DMRS) in one or more signaling communications (such as, one or more RRC communications, one or more MAC-CE communications, one or more DCI communications, etc.).

[0126] In some aspects, the indication of the time-frequency mapping for the ZP-DMRS may identify the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped. For example, the indication of the time-frequency mapping for the ZP-DMRS may identify a symbol index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, may identify a resource block index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, may identify a resource element index associated with the resource element or symbol / subcarrier combination to which the ZP-DMRS is mapped, and the like.

[0127] In some aspects, the indication of the time-frequency mapping for the ZP-DMRS may include a bitmap indicating the respective positions of the resource elements or symbol / subcarrier combinations to which the ZP-DMRS is mapped. The length of the bitmap may be based at least in part on the number of symbols included in a physical channel for data transmission associated with the ZP-DMRS, may be based at least in part on the number of physical resource blocks included in the physical channel for data transmission associated with the ZP-DMRS, may be based at least in part on the number of resource elements included in the physical channel for data transmission associated with the ZP-DMRS, etc.

[0128] In some aspects, an indication of a time-frequency mapping for a ZP-DMRS may be included in a DMRS configuration for a DMRS transmission that conflicts with a data transmission associated with the ZP-DMRS. For example, an indication of a time-frequency mapping for an uplink ZP-DMRS may be included in a DMRS configuration for a downlink DMRS transmission that conflicts with an uplink data transmission. As another example, an indication of a time-frequency mapping for a downlink ZP-DMRS may be included in a DMRS configuration for an uplink DMRS transmission that conflicts with a downlink data transmission. In this case, since the time-frequency mapping for the ZP-DMRS is the same as the time-frequency mapping for the DMRS transmission, the BS may send or forward the DMRS configuration for the DMRS transmission as an indication of the time-frequency mapping for the ZP-DMRS.

[0129] Therefore, the BS may send or forward an indication of the DMRS configuration for uplink DMRS transmission to the wireless communication device, which may serve as an indication of the time-frequency mapping for the downlink ZP-DMRS. Similarly, the BS may send or forward an indication of the DMRS configuration for downlink DMRS transmission to the wireless communication device, which may serve as an indication of the time-frequency mapping for the uplink ZP-DMRS.

[0130] In some aspects, the BS may send an indication of a time-frequency mapping for the ZP-DMRS in multiple signaling communications. For example, the BS may send an indication of multiple candidate time-frequency mappings for the ZP-DMRS in a static signaling communication (e.g., an RRC communication) or a semi-static signaling communication (e.g., a MAC-CE communication), and may send a dynamic signaling communication (e.g., a DCI communication) that identifies or selects a time-frequency mapping for the ZP-DMRS from multiple candidate time-frequency mappings by indexing into the multiple candidate time-frequency mappings.

[0131] As another example, the BS may send an indication of multiple candidate DMRS configurations for ZP-DMRS in static signaling communication (e.g., RRC communication) or semi-static signaling communication (e.g., MAC-CE communication), and may send dynamic signaling communication (e.g., DCI communication) that identifies or selects a DMRS configuration for ZP-DMRS from multiple candidate DMRS configurations by indexing into the multiple candidate DMRS configurations.

[0132] As another example, the BS may send an indication of a first subset of parameters for DMRS configuration for ZP-DMRS in static signaling communication (e.g., RRC communication) or semi-static signaling communication (e.g., MAC-CE communication), and may send dynamic signaling communication (e.g., DCI communication) that identifies a second subset of parameters for DMRS configuration for ZP-DMRS. The first subset of parameters may include a timing mapping type for DMRS transmission (e.g., type A DMRS mapping or type B DMRS mapping), a frequency configuration type for DMRS transmission (e.g., type 1 configuration or type 2 configuration), a certain number of front-loaded DMRS symbols, a certain number of additional DMRS symbols, etc. The second subset of parameters may include an index of a code division multiplexing group for DMRS transmission, a time-frequency resource location for DMRS transmission, etc.

[0133] like Figure 7 As further shown by reference numeral 708, the BS and the wireless communication device can perform full-duplex communication based at least in part on the time-frequency mapping for the downlink ZP-DMRS and / or the time-frequency mapping for the uplink ZP-DMRS. For example, the BS can rate match downlink data transmission and send downlink data transmission based at least in part on the time-frequency mapping for the downlink ZP-DMRS (reference numeral 708-1). As another example, the wireless communication device can receive an indication of the time-frequency mapping for the uplink ZP-DMRS, and can rate match uplink data transmission and send uplink data transmission based at least in part on the time-frequency mapping for the uplink ZP-DMRS (reference numeral 708-2).

[0134] In some aspects, the BS and / or the wireless communication device may rate match the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS by excluding from the data transmission one or more resource elements or symbol / subcarrier combinations included in the full-duplex time-frequency resources and indicated by the time-frequency mapping. To exclude the one or more resource elements or symbol / subcarrier combinations, the BS and / or the wireless communication device may determine the rate matching output length for the data transmission based at least in part on avoiding mapping the coded bits associated with the ZP-DMRS to the one or more resource elements or symbol / subcarrier combinations. In this way, for the ZP-DMRS in the one or more resource elements or symbol / subcarrier combinations, the transmit power is configured to be equal to or close to zero transmit power.

[0135] To determine the rate matching output length, the BS and / or the wireless communication device may subtract the number of resource elements or symbol / subcarrier combinations from the total number of resource elements or symbol / subcarrier combinations in the full-duplex time-frequency resources, multiply the remaining resource elements or symbol / subcarrier combinations by the modulation order used for data transmission (e.g., 2 for BPSK, 4 for 16QAM, 6 for 64QAM, 8 for 256QAM, 10 for 1024QAM, 12 for 4096QAM, etc.), and multiply the resulting product by the spatial multiplexing degree of data transmission.

[0136] like Figure 7 As further shown by reference numeral 710, rate dematching can be performed on downlink data transmission and / or uplink data transmission. For example, the wireless communication device can receive an indication of a time-frequency mapping for a downlink ZP-DMRS and a downlink data transmission, and can rate dematch the downlink data transmission based at least in part on the time-frequency mapping for the downlink ZP-DMRS (reference numeral 710-1). As another example, the BS can receive an uplink data transmission, and can rate dematch the uplink data transmission based at least in part on the time-frequency mapping for the uplink ZP-DMRS (reference numeral 710-2).

[0137] In some aspects, the BS and / or wireless communication device may rate dematch the data transmission based at least in part on identifying one or more resource elements or symbol / subcarrier combinations included in the full-duplex time-frequency resources and indicated by the time-frequency mapping associated with the ZP-DMRS that have been excluded from the data transmission. In this case, the BS or wireless communication device may determine a rate dematch output length for the data transmission based at least in part on avoiding mapping coded bits associated with the ZP-DMRS to the one or more resource elements or symbol / subcarrier combinations. In this manner, the received power is configured to be equal to or close to zero received power for the ZP-DMRS in the one or more resource elements or symbol / subcarrier combinations.

[0138] To determine the rate dematching output length, the BS and / or the wireless communication device may subtract the number of resource elements or symbol / subcarrier combinations, multiply the remaining resource elements or symbol / subcarrier combinations by the modulation order used for data transmission (e.g., 2 for binary phase shift keying (BPSK), 4 for 16 quadrature amplitude modulation (16QAM), 6 for 64 quadrature amplitude modulation (64QAM), 8 for 256 quadrature amplitude modulation (256QAM), 10 for 1024 quadrature amplitude modulation (1024QAM), 12 for 4096 quadrature amplitude modulation (4096QAM), etc.), and multiply the resulting product by the spatial multiplexing degree of data transmission.

[0139] In this way, the BS can identify the conflict between data transmission and DMRS transmission in full-duplex time-frequency resources. The BS can configure the ZP-DMRS based at least in part on the identification of the conflict. The BS can configure the ZP-DMRS so that the time-frequency mapping for the ZP-DMRS is the same as the time-frequency mapping for DMRS transmission and data transmission. In other words, in the symbols and subcarriers where the data transmission and DMRS transmission conflict, the BS configures the ZP-DMRS to replace the data transmission in the symbols and subcarriers. In this way, when rate matching and / or rate dematching are performed on the data transmission, the symbols and subcarriers occupied by the ZP-DMRS are excluded, which respectively reduces or prevents the power enhancement caused by the simultaneous transmission and reception of data transmission and DMRS transmission. This reduces self-interference and / or interference between devices, improves the channel estimation performance based on DMRS based at least in part on DMRS transmission, improves signal reception and decoding performance, increases data throughput, etc.

[0140] As indicated above, provide Figure 7 As an example. Other examples can be related to Figure 7 Different than described.

[0141] Figure 8is a diagram illustrating an example process 800, performed, for example, by a BS, in accordance with aspects of the present disclosure. Example process 800 is an example of a BS (eg, BS 110, etc.) performing operations associated with DMRS for full-duplex communications.

[0142] like Figure 8 As shown in , in some aspects, process 800 may include identifying a conflict between a data transmission in a full-duplex time-frequency resource and a DMRS transmission (block 810). For example, the BS (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may identify a conflict between a data transmission in a full-duplex time-frequency resource and a DMRS transmission, as described above.

[0143] like Figure 8 As further shown in FIG. 8 , in some aspects, process 800 may include sending an indication of a time-frequency mapping for a ZP-DMRS in a full-duplex time-frequency resource to a wireless communication device, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping (block 820). For example, the BS (e.g., using transmit processor 220, receive processor 238, controller / processor 240, memory 242, etc.) may send an indication of a time-frequency mapping for a ZP-DMRS in the full-duplex time-frequency resource to the wireless communication device, as described above. In some aspects, the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping.

[0144] Process 800 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0145] In a first aspect, the data transmission comprises a physical downlink shared channel (PDSCH) data transmission, the DMRS transmission comprises a PUSCH DMRS transmission, and the ZP-DMRS comprises a PDSCH ZP-DMRS. In a second aspect, either alone or in combination with the first aspect, the process 800 further comprises rate matching the PDSCH data transmission by excluding one or more resource elements associated with the PDSCH ZP-DMRS in full-duplex time-frequency resources from the PDSCH data transmission, the one or more resource elements being based at least in part on a time-frequency mapping of the PDSCH ZP-DMRS, and performing the PDSCH data transmission based at least in part on rate matching the PDSCH data transmission.

[0146] In a third aspect, alone or in combination with one or more of the first and second aspects, rate matching a PDSCH data transmission by excluding one or more resource elements from the PDSCH data transmission comprises: determining a rate matching output length for the PDSCH data transmission based at least in part on avoiding mapping coded bits associated with a PDSCH ZP-DMRS from the one or more resource elements. In a fourth aspect, alone or in combination with one or more of the first to third aspects, the data transmission comprises a PUSCH data transmission, the DMRS transmission comprises a PDSCH DMRS transmission, and the ZP-DMRS comprises a PUSCH ZP-DMRS.

[0147] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, process 800 further comprises receiving a PUSCH data transmission from a wireless communication device, the PUSCH data transmission being rate matched such that one or more resource elements of a full-duplex time-frequency resource associated with a PUSCH ZP-DMRS are excluded from the PUSCH data transmission, and the one or more resource elements are based at least in part on a time-frequency mapping of the PUSCH ZP-DMRS, and rate dematching the PUSCH data transmission is based at least in part on the exclusion of the one or more resource elements from the PUSCH data transmission. In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, rate dematching the PUSCH data transmission comprises determining a rate dematching output length for the PUSCH data transmission based at least in part on avoiding mapping coded bits associated with the PUSCH ZP-DMRS from the one or more resource elements.

[0148] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 800 further includes identifying another conflict between a PDSCH data transmission in a full-duplex time-frequency resource and another DMRS transmission, the other DMRS transmission comprising a PUSCH DMRS transmission, and sending an indication of a time-frequency mapping for PDSCH ZP-DMRS in the full-duplex time-frequency resources to another wireless communication device, the time-frequency mapping for PDSCH ZP-DMRS and the time-frequency mapping for another DMRS transmission in the full-duplex time-frequency resources being the same time-frequency mapping.

[0149] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the wireless communication device includes a first UE, and the other wireless communication device includes a second UE. In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the BS includes an IAB node, the wireless communication device includes a UE or a child IAB node, and the other wireless communication device includes an IAB donor or a parent IAB node. In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the BS includes an IAB node, the wireless communication device includes an IAB donor or a parent IAB node, and the other wireless communication device includes a UE or a child IAB node.

[0150] In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, process 800 further includes identifying another conflict between a PDSCH data transmission in a full-duplex time-frequency resource and another DMRS transmission, the other DMRS transmission comprising a PUSCH DMRS transmission, and sending an indication of a time-frequency mapping for a PDSCH ZP-DMRS in the full-duplex time-frequency resource to the wireless communication device, the time-frequency mapping for the PDSCH ZP-DMRS and the time-frequency mapping for the other DMRS transmission in the full-duplex time-frequency resource being the same time-frequency mapping. In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, the wireless communication device comprises a UE supporting full-duplex.

[0151] In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, process 800 further comprises determining that a conflict between a data transmission and a DMRS transmission will produce interference satisfying an interference threshold, and sending an indication of a time-frequency mapping for a ZP-DMRS comprises sending an indication of a time-frequency mapping for a ZP-DMRS based at least in part on determining that a conflict between a data transmission and a DMRS transmission will produce interference satisfying the interference threshold. In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the time-frequency mapping for a ZP-DMRS comprises one or more resource elements associated with the ZP-DMRS in a full-duplex time-frequency resource.

[0152] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, sending an indication of a time-frequency mapping for a ZP-DMRS comprises sending an indication of at least one of a symbol index associated with one or more resource elements, a resource block index associated with one or more resource elements, or a resource element index associated with one or more resource elements. In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, sending an indication of a time-frequency mapping for a ZP-DMRS comprises sending a bitmap indicating respective positions of one or more resource elements.

[0153] In a seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, an indication of a time-frequency mapping for a ZP-DMRS is included in a DMRS configuration for DMRS transmission, and sending an indication of a time-frequency mapping for a ZP-DMRS includes sending an indication of a DMRS configuration to a wireless communication device. In an eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, sending an indication of a DMRS configuration includes sending an indication of a first subset of parameters included in a DMRS configuration in a static or semi-static signaling communication; and sending an indication of a second subset of parameters included in a DMRS configuration in a dynamic signaling communication.

[0154] In the nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, sending an indication of a DMRS configuration includes sending an indication of multiple candidate DMRS configurations in a static or semi-static signaling communication; and sending an indication of selecting a DMRS configuration from multiple candidate DMRS configurations in a dynamic signaling.

[0155] although Figure 8 Example blocks of process 800 are shown, but in some aspects process 800 may include additional blocks, fewer blocks, different blocks, or different Figure 8 Additionally or alternatively, two or more of the blocks of process 800 may be performed in parallel.

[0156] Fig. 9 is a diagram illustrating an example process 900, performed, for example, by a wireless communication device, in accordance with aspects of the present disclosure. Example process 900 is an example of a wireless communication device (eg, UE 120, BS 110, etc.) performing operations associated with DMRS for full-duplex communication.

[0157] like Fig. 9 As shown in , in some aspects, process 900 may include receiving an indication of a time-frequency mapping for ZP-DMRS in full-duplex time-frequency resources from a BS and based at least in part on a conflict between data transmission and DMRS transmission in the full-duplex time-frequency resources, wherein the time-frequency mapping for ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping (block 910). For example, a UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive an indication of a time-frequency mapping for ZP-DMRS in full-duplex time-frequency resources from a BS and based at least in part on a conflict between data transmission and DMRS transmission in the full-duplex time-frequency resources, as described above. In some aspects, the time-frequency mapping for ZP-DMRS and the time-frequency mapping for DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

[0158] like Fig. 9 As shown in , in some aspects, process 900 may include rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS (block 920). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may rate match the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, as described above.

[0159] like Fig. 9 As shown in , in some aspects, process 900 may include receiving a data transmission from a BS based at least in part on the data transmission being rate matched based at least in part on a time-frequency mapping for a ZP-DMRS (block 930). For example, a UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive the data transmission from a BS based at least in part on the data transmission being rate matched based at least in part on a time-frequency mapping for a ZP-DMRS, as described above.

[0160] Process 900 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0161] In a first aspect, data transmission comprises a PDSCH data transmission, the DMRS transmission comprises a PUSCH DMRS transmission, the ZP-DMRS comprises a PDSCH ZP-DMRS, and the data transmission is rate matched based at least in part on a time-frequency mapping for the ZP-DMRS or the data transmission is rate matched based at least in part on a time-frequency mapping for the ZP-DMRS. Receiving the data transmission comprises receiving the PDSCH data transmission based at least in part on the PDSCH data transmission being rate matched based at least in part on a time-frequency mapping for the PDSCH ZP-DMRS.

[0162] In a second aspect, either alone or in combination with the first aspect, PDSCH data transmission is rate matched such that one or more resource elements of a full-duplex time-frequency resource associated with a PDSCH ZP-DMRS are excluded from the PDSCH data transmission, the one or more resource elements being based at least in part on a time-frequency mapping of the PDSCH ZP-DMRS, and process 900 further includes rate dematching the PDSCH data transmission based at least in part on excluding the one or more resource elements from the PDSCH data transmission.

[0163] In a third aspect, either alone or in combination with one or more of the first and second aspects, rate dematching a PDSCH data transmission comprises determining a rate dematching output length for the PDSCH data transmission based at least in part on avoiding mapping coded bits associated with a PDSCH ZP-DMRS from one or more resource elements. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the data transmission comprises a PUSCH data transmission, the DMRS transmission comprises a PDSCH DMRS transmission, the ZP-DMRS comprises a PUSCH ZP-DMRS, and the data transmission is rate matched based at least in part on a time-frequency mapping for the ZP-DMRS or the data transmission is rate matched based at least in part on a time-frequency mapping for the ZP-DMRS to receive the data transmission, and the data transmission comprises rate matching the PUSCH data transmission based at least in part on a time-frequency mapping for the PUSCH ZP-DMRS.

[0164] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, rate matching a PUSCH data transmission based at least in part on a time-frequency mapping for a PUSCH ZP-DMRS includes excluding one or more resource elements associated with a PUSCH ZP-DMRS of a full-duplex time-frequency resource from the PUSCH data transmission, the one or more resource elements being based at least in part on a time-frequency mapping of the PUSCH ZP-DMRS, and the method further includes performing the PUSCH data transmission based at least in part on rate matching the PUSCH data transmission. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, excluding one or more resource elements from the PUSCH data transmission includes determining a rate matching output length for the PUSCH data transmission based at least in part on avoiding mapping coded bits associated with the PUSCH ZP-DMRS from one or more resource elements.

[0165] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 900 further comprises: receiving an indication of a time-frequency mapping for PDSCH ZP-DMRS in full-duplex time-frequency resources from BS 110 and based at least in part on a conflict between PDSCH data transmission and PUSCH DMRS transmission in the full-duplex time-frequency resources, the time-frequency mapping for PDSCH ZP-DMRS and the time-frequency mapping for PUSCH DMRS transmission in the full-duplex time-frequency resources being the same time-frequency mapping; and receiving PDSCH data transmission from the BS based at least in part on the PDSCH data transmission being rate matched based at least in part on the time-frequency mapping for PDSCH ZP-DMRS.

[0166] In an eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the wireless communication device comprises a UE supporting full duplex. In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the wireless communication device comprises a UE. In a tenth aspect, either alone or in combination with one or more of the first to ninth aspects, the wireless communication device comprises an IAB donor, an IAB node, or a UE, and the BS comprises an IAB node. In an eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the time-frequency mapping for the ZP-DMRS comprises one or more resource elements associated with the ZP-DMRS in a full-duplex time-frequency resource.

[0167] In a twelfth aspect, either alone or in combination with one or more of the first to eleventh aspects, receiving an indication of time-frequency mapping for a ZP-DMRS comprises receiving an indication of at least one of a symbol index associated with one or more resource elements, a resource block index associated with one or more resource elements, or a resource element index associated with one or more resource elements. In a thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, receiving an indication of time-frequency mapping for a ZP-DMRS comprises receiving a bitmap indicating corresponding positions of one or more resource elements. In a fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the indication of time-frequency mapping for a ZP-DMRS is included in a DMRS configuration for DMRS transmission, and receiving an indication of time-frequency mapping for a ZP-DMRS comprises receiving an indication of a DMRS configuration from a BS.

[0168] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, receiving an indication of a DMRS configuration includes receiving an indication of a first subset of parameters included in the DMRS configuration in a static or semi-static signaling communication; and receiving an indication of a second subset of parameters included in the DMRS configuration in a dynamic signaling communication. In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, receiving an indication of a DMRS configuration includes receiving an indication of multiple candidate DMRS configurations in a static or semi-static signaling communication, and receiving an indication of selecting a DMRS configuration from the multiple candidate DMRS configurations in a dynamic signaling communication, the dynamic signaling communication indexing the multiple candidate DMRS configurations.

[0169] although Fig. 9 Example blocks of process 900 are shown, but in some aspects process 900 may include additional blocks, fewer blocks, different blocks, or different Fig. 9 Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

[0170] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the foregoing disclosure or may be acquired from practice of these aspects.

[0171] As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, or a combination of hardware and software.

[0172] Some aspects are described herein in conjunction with thresholds. As used herein, depending on the context, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc.

[0173] It will be apparent that the systems and / or methods described herein may be implemented in various forms of hardware, firmware, or a combination of hardware and software. The actual dedicated control hardware or software code used to implement the systems and / or methods is not limited in these respects. Thus, the operation and behavior of the systems and / or methods described herein are not referenced to specific software code—it should be understood that software and hardware may be designed to implement the systems and / or methods based at least in part on the description herein.

[0174] Even if a particular combination of features is described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner that is not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes the combination of each dependent claim with each other claim in the claim set. The phrase "at least one of" the referenced item list refers to any combination of those items, including a single component. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other ordering of a, b and c).

[0175] Unless explicitly described as such, the elements, actions or instructions used herein should not be interpreted as critical or essential. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.), and can be used interchangeably with "one or more". When only one item is intended, the phrase "only one" or similar language is used. In addition, as used herein, the terms "has", "have", "having" and / or similar terms are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated.

Claims

1. A method of wireless communication performed by a network entity, include: Identify conflicts between data transmission and demodulation reference signal (DMRS) transmission in full-duplex time-frequency resources; Determining a time-frequency mapping for a zero-power DMRS ZP-DMRS in full-duplex time-frequency resources based at least in part on the identified conflict; as well as sending an indication of the time-frequency mapping for the ZP-DMRS in the full-duplex time-frequency resource to a wireless communication device, The time-frequency mapping used for the ZP-DMRS and the time-frequency mapping used for the DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

2. The method according to claim 1, wherein the data transmission include: Physical downlink shared channel PDSCH data transmission; The DMRS transmission includes: Physical uplink shared channel PUSCH DMRS transmission; and The ZP-DMRS includes: PDSCH ZP-DMRS.

3. The method according to claim 2, further comprising: include: performing rate matching on the PDSCH data transmission by excluding one or more resource elements of the full-duplex time-frequency resource associated with the PDSCH ZP-DMRS from the PDSCH data transmission, wherein the one or more resource elements are based at least in part on the time-frequency mapping of the PDSCH ZP-DMRS; and The PDSCH data transmission is performed based at least in part on rate matching the PDSCH data transmission.

4. The method of claim 3, wherein the PDSCH data transmission is rate matched by excluding one or more resource elements from the PDSCH data transmission. include: A rate matched output length for the PDSCH data transmission is determined based at least in part on avoiding mapping coded bits associated with the PDSCH ZP-DMRS to the one or more resource elements.

5. The method according to claim 1, wherein the data transmission include: Physical uplink shared channel PUSCH data transmission; The DMRS transmission includes: Physical downlink shared channel PDSCH DMRS transmission; and Wherein the ZP-DMRS comprises: PUSCH ZP-DMRS.

6. The method according to claim 5, further comprising: include: receiving the PUSCH data transmission from the wireless communication device, wherein the PUSCH data transmission is rate matched such that one or more resource elements of the full-duplex time-frequency resources associated with the PUSCH ZP-DMRS are excluded from the PUSCH data transmission, wherein the one or more resource elements are based at least in part on the time-frequency mapping of the PUSCH ZP-DMRS; as well as The PUSCH data transmission is rate dematched based at least in part on the one or more resource elements being excluded from the PUSCH data transmission.

7. The method according to claim 6, wherein the PUSCH data transmission is rate dematched include: Determine a rate-matching output length for the PUSCH data transmission, at least in part based on avoiding mapping coded bits associated with the PUSCH ZP-DMRS from the one or more resource elements.

8. The method according to claim 5, further comprising: identifying another conflict between PDSCH data transmission and another DMRS transmission in the full-duplex time-frequency resource, wherein the another DMRS transmission comprises: PUSCH DMRS transmission; and sending an indication of a time-frequency mapping for PDSCH ZP-DMRS in the full-duplex time-frequency resource to another wireless communication device, wherein the time-frequency mapping for the PDSCH ZP-DMRS and the time-frequency mapping for the another DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping.

9. The method according to claim 8, wherein the wireless communication device comprises: a first user equipment UE; and wherein the another wireless communication device comprises: a second UE.

10. The method according to claim 8, wherein the network entity comprises: an integrated access and backhaul IAB node; wherein the wireless communication device comprises: a user equipment or a sub-IAB node; and wherein the another wireless communication device comprises: an IAB donor or a parent IAB node.

11. The method according to claim 8, wherein the network entity comprises: an integrated access and backhaul IAB node; wherein the wireless communication device comprises: an IAB donor or a parent IAB node; and wherein the another wireless communication device comprises: a user equipment or a sub-IAB node.

12. The method according to claim 5, further comprising: identifying another conflict between PDSCH data transmission and another DMRS transmission in the full-duplex time-frequency resource, wherein the another DMRS transmission comprises: PUSCH DMRS transmission; and sending an indication of a time-frequency mapping for PDSCH ZP-DMRS in the full-duplex time-frequency resource to the wireless communication device, wherein the time-frequency mapping for the PDSCH ZP-DMRS and the time-frequency mapping for the another DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping.

13. The method according to claim 12, wherein the wireless communication device comprises: a full-duplex-capable user equipment.

14. The method according to claim 1, further comprising: determining that the conflict between the data transmission and the DMRS transmission will generate interference that meets an interference threshold; and wherein sending the indication of the time-frequency mapping for the ZP-DMRS comprises: sending the indication of the time-frequency mapping for the ZP-DMRS at least in part based on determining that the conflict between the data transmission and the DMRS transmission will generate interference that meets the interference threshold.

15. The method according to claim 1, wherein the time-frequency mapping for the ZP-DMRS comprises one or more resource elements in the full-duplex time-frequency resource associated with the ZP-DMRS.

16. The method of claim 15, wherein the indication of the time-frequency mapping for the ZP-DMRS is sent include: Send an indication of at least one of the following: a symbol index associated with the one or more resource elements, a resource block index associated with the one or more resource elements, or a resource element index associated with the one or more resource elements.

17. The method of claim 15, wherein the indication of the time-frequency mapping for the ZP-DMRS is sent include: A bitmap is sent indicating respective positions of the one or more resource elements.

18. The method of claim 1, wherein the indication of the time-frequency mapping for the ZP-DMRS is included in a DMRS configuration for the DMRS transmission; and wherein the indication of the time-frequency mapping for the ZP-DMRS is sent include: An indication of the DMRS configuration is sent to the wireless communication device.

19. The method of claim 18, wherein the indication of the DMRS configuration is sent include: sending, in a static or semi-static signaling communication, an indication of a first subset of parameters included in the DMRS configuration; as well as An indication of a second subset of parameters included in the DMRS configuration is sent in a dynamic signaling communication.

20. The method of claim 18, wherein the indication of the DMRS configuration is sent include: sending an indication of a plurality of candidate DMRS configurations in a static or semi-static signaling communication; as well as sending, in a dynamic signaling communication, an indication of selecting the DMRS configuration from the plurality of candidate DMRS configurations, The dynamic signaling communication is indexed into the multiple candidate DMRS configurations.

21. A method of wireless communication performed by a wireless communication device, include: receiving, from a network entity and based at least in part on a scheduling conflict between data transmission and demodulation reference signal (DMRS) transmission in the full-duplex time-frequency resources, an indication of a time-frequency mapping for a zero-power DMRS (ZP-DMRS) in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; as well as rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or The data transmission is received based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

22. The method of claim 21, wherein the data transmission include: Physical downlink shared channel PDSCH data transmission; The DMRS transmission includes: Physical uplink shared channel PUSCH DMRS transmission; Wherein the ZP-DMRS comprises: PDSCH ZP-DMRS; and wherein the data transmission is rate matched based at least in part on the time-frequency mapping for the ZP-DMRS, or the data transmission is rate matched based at least in part on the time-frequency mapping for the ZP-DMRS, to receive the data transmission, comprising: The PDSCH data transmission is received based at least in part on being rate matched based at least in part on the time-frequency mapping for the PDSCH ZP-DMRS.

23. The method of claim 22, wherein the PDSCH data transmission is rate matched such that one or more resource elements of the full-duplex time-frequency resources associated with the PDSCH ZP-DMRS are excluded from the PDSCH data transmission, wherein the one or more resource elements are based at least in part on the time-frequency mapping of the PDSCH ZP-DMRS; and The method also include: The PDSCH data transmission is rate dematched based at least in part on the one or more resource elements being excluded from the PDSCH data transmission.

24. The method of claim 23, wherein the PDSCH data transmission is rate dematched include: A rate dematching output length for the PDSCH data transmission is determined based at least in part on avoiding mapping coded bits associated with the PDSCH ZP-DMRS from the one or more resource elements.

25. The method of claim 21, wherein the data transmission include: Physical uplink shared channel PUSCH data transmission; The DMRS transmission includes: Physical downlink shared channel PDSCHDMRS transmission; Wherein the ZP-DMRS comprises: PUSCH ZP-DMRS; and wherein the data transmission is rate matched based at least in part on the time-frequency mapping for the ZP-DMRS, or the data transmission is rate matched based at least in part on the time-frequency mapping for the ZP-DMRS, to receive the data transmission, comprising: The PUSCH data transmission is rate matched based at least in part on the time-frequency mapping for the PUSCH ZP-DMRS.

26. The method of claim 25, wherein the PUSCH data transmission is rate matched based at least in part on the time-frequency mapping for the PUSCH ZP-DMRS include: excluding one or more resource elements of the full-duplex time-frequency resource associated with the PUSCH ZP-DMRS from the PUSCH data transmission, wherein the one or more resource elements are based at least in part on the time-frequency mapping of the PUSCH ZP-DMRS; as well as The method further comprises: The PUSCH data transmission is performed based at least in part on rate matching the PUSCH data transmission.

27. The method of claim 26, wherein the one or more resource elements are excluded from the PUSCH data transmission. include: A rate matched output length for the PUSCH data transmission is determined based at least in part on avoiding mapping coded bits associated with the PUSCH ZP-DMRS from the one or more resource elements.

28. The method according to claim 25, further comprising: include: receiving an indication of a time-frequency mapping for a PDSCH ZP-DMRS in the full-duplex time-frequency resources based at least in part on a scheduling conflict between a PDSCH data transmission and a PUSCH DMRS transmission in the full-duplex time-frequency resources, wherein the time-frequency mapping for the PDSCH ZP-DMRS and the time-frequency mapping for the PUSCH DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping; and The PDSCH data transmission is received based at least in part on being rate matched based at least in part on the time-frequency mapping for the PDSCH ZP-DMRS.

29. The method of claim 28, wherein the wireless communication device include: Supports full-duplex user equipment.

30. The method of claim 21, wherein the wireless communication device include: User equipment.

31. The method of claim 21, wherein the wireless communication device include: Integrated access and backhaul IAB donor, IAB node, or User equipment; as well as The network entities include: IAB node.

32. The method of claim 21, wherein the time-frequency mapping for the ZP-DMRS comprises one or more resource elements associated with the ZP-DMRS in the full-duplex time-frequency resources.

33. The method of claim 32, wherein receiving the indication of the time-frequency mapping for the ZP-DMRS include: Receiving an indication of at least one of the following: a symbol index associated with the one or more resource elements, a resource block index associated with the one or more resource elements, or a resource element index associated with the one or more resource elements.

34. The method of claim 32, wherein receiving the indication of the time-frequency mapping for the ZP-DMRS include: A bitmap is received that indicates respective positions of the one or more resource elements.

35. The method of claim 21, wherein the indication of the time-frequency mapping for the ZP-DMRS is included in a DMRS configuration for the DMRS transmission; and wherein receiving the indication of the time-frequency mapping for the ZP-DMRS include: An indication of the DMRS configuration is received from the network entity.

36. The method of claim 35, wherein receiving the indication of the DMRS configuration include: receiving, in a static or semi-static signaling communication, an indication of a first subset of parameters included in the DMRS configuration; as well as An indication of a second subset of parameters included in the DMRS configuration is received in a dynamic signaling communication.

37. The method of claim 35, wherein receiving the indication of the DMRS configuration include: receiving an indication of a plurality of candidate DMRS configurations in a static or semi-static signaling communication; as well as receiving, in a dynamic signaling communication, an indication of selecting the DMRS configuration from the plurality of candidate DMRS configurations, The dynamic signaling communication is indexed into the multiple candidate DMRS configurations.

38. A network entity for wireless communication, include: one or more memories; as well as One or more processors, coupled to the one or more memories, configured to: Identify conflicts between data transmission and demodulation reference signal (DMRS) transmission in full-duplex time-frequency resources; as well as Determining a time-frequency mapping for a zero-power DMRS ZP-DMRS in full-duplex time-frequency resources based at least in part on the identified conflict; sending an indication of time-frequency mapping for the ZP-DMRS in the full-duplex time-frequency resource to a wireless communication device, The time-frequency mapping used for the ZP-DMRS and the time-frequency mapping used for the DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

39. A wireless communication device for wireless communication, include: one or more memories; as well as One or more processors, coupled to the one or more memories, configured to: receiving, from a network entity and based at least in part on a scheduling conflict between data transmission and demodulation reference signal (DMRS) transmission in the full-duplex time-frequency resources, an indication of a time-frequency mapping for a zero-power DMRS (ZP-DMRS) in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; as well as rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or The data transmission is received based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

40. The wireless communication device of claim 39, wherein the ZP-DMRS is configured to replace the data transmission.

41. A non-transitory computer readable medium storing one or more instructions for wireless communication, the one or more instructions include: One or more instructions that, when executed by one or more processors of a network entity, cause the one or more processors to: Identify conflicts between data transmission and demodulation reference signal (DMRS) transmission in full-duplex time-frequency resources; as well as Determining a time-frequency mapping for a zero-power DMRS ZP-DMRS in full-duplex time-frequency resources based at least in part on the identified conflict; sending an indication of time-frequency mapping for the ZP-DMRS in the full-duplex time-frequency resource to a wireless communication device, The time-frequency mapping used for the ZP-DMRS and the time-frequency mapping used for the DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

42. A non-transitory computer readable medium storing one or more instructions for wireless communication, the one or more instructions include: One or more instructions that, when executed by one or more processors of a wireless communication device, cause the one or more processors to: receiving, from a network entity and based at least in part on a scheduling conflict between data transmission and demodulation reference signal (DMRS) transmission in the full-duplex time-frequency resources, an indication of a time-frequency mapping for a zero-power DMRS (ZP-DMRS) in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; as well as rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or The data transmission is received based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

43. An apparatus for wireless communication, include: A component for identifying a conflict between data transmission and demodulation reference signal DMRS transmission in full-duplex time-frequency resources; as well as means for determining a time-frequency mapping for a zero-power DMRS ZP-DMRS in full-duplex time-frequency resources based at least in part on the identified conflict; means for sending an indication of a time-frequency mapping for the ZP-DMRS in the full-duplex time-frequency resources to a wireless communication device, The time-frequency mapping used for the ZP-DMRS and the time-frequency mapping used for the DMRS transmission in the full-duplex time-frequency resources are the same time-frequency mapping.

44. An apparatus for wireless communication, include: means for receiving, from a network entity and based at least in part on a scheduling conflict between data transmission and demodulation reference signal DMRS transmission in the full-duplex time-frequency resources, an indication of a time-frequency mapping for a zero-power DMRS ZP-DMRS in the full-duplex time-frequency resources, wherein the time-frequency mapping for the ZP-DMRS and the time-frequency mapping for the DMRS transmission in the full-duplex time-frequency resource are the same time-frequency mapping; as well as rate matching the data transmission based at least in part on the time-frequency mapping for the ZP-DMRS, or Means for receiving the data transmission based at least in part on the data transmission being rate matched based at least in part on the time-frequency mapping for the ZP-DMRS.

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