Phase tracking reference signal activation based on repetition indication or demodulation reference signal bundling indication

Abstract

In summary, the various formats of this application relate to wireless communication. In some formats, a user equipment (UE) may receive an indication of a repetition factor associated with a message or an indication to apply a demodulation reference signal (DMRS) to the message for joint channel estimation. The UE may transmit a phase tracking reference signal (PTRS) associated with the message, at least in part based on receiving the indication of the repetition factor or the indication to apply the DMRS. Numerous other formats are provided.

Description

[Technical Field]

[0001] In general, the contents of this case relate to wireless communication and to techniques and apparatus for initiating a phase tracking reference signal (PTRS) based on a repeating indication or a demodulation reference signal (DMRS) accompanied by an indication. [Previous Technology]

[0002] Wireless communication systems are widely deployed to provide various telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiplexing access technologies that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiplexing access technologies include Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and Long Term Evolution (LTE). LTE / LTE-Enhanced is an enhancement set of the Universal Mobile Telecommunications System (UMTS) mobile service standard released by the 3rd Generation Partnership Project (3GPP).

[0003] A wireless network may include multiple base stations (BSs) capable of supporting communications for multiple user equipments (UEs). UEs may communicate with base stations via downlinks and uplinks. A "downlink" (or "forward link") represents the communication link from the base station to the UE, and an "uplink" (or "backlink") represents the communication link from the UE to the BS. As will be described in more detail herein, a base station may be referred to as a Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0004] The above multiplexing access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global levels. NR (which may also be referred to as 5G) is an enhancement set of the LTE mobile service standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM)) on the uplink (UL), thereby better supporting mobile broadband internet access, and supporting beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other radio access technologies remain useful. [Summary of the Invention]

[0005] In some embodiments, a user equipment (UE) for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors being configured to: receive an indication of a repetition factor associated with a message or an indication of applying a demodulation reference signal (DMRS) to the message for joint channel estimation; and transmit a phase tracking reference signal (PTRS) associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying the DMRS.

[0006] In some embodiments, a base station for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors being configured to: transmit an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and transmit PTRS associated with the message based at least in part on transmitting the indication of the repetition factor or the indication of applying DMRS appended.

[0007] In some forms, a method of radio communication performed by a UE includes: receiving an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and transmitting PTRS associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying DMRS appended.

[0008] In some embodiments, a method of wireless communication performed by a base station includes: sending an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and transmitting PTRS associated with the message based at least in part on sending the indication of the repetition factor or the indication of applying DMRS appended.

[0009] In some embodiments, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of the UE, cause the UE to: receive an indication of a repetition factor associated with a message or an indication to apply DMRS appended to the message for joint channel estimation; and transmit PTRS associated with the message based at least in part on receiving the indication of the repetition factor or the indication to apply DMRS appended.

[0010] In some embodiments, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: send an indication of a repetition factor associated with a message or an indication to apply DMRS to the message for joint channel estimation; and transmit PTRS associated with the message based at least in part on the indication of sending the repetition factor or the indication to apply DMRS.

[0011] In some forms, an apparatus for wireless communication includes: a unit for receiving an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and a unit for transmitting PTRS associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying DMRS appended.

[0012] In some forms, an apparatus for wireless communication includes: a unit for transmitting an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and a unit for transmitting PTRS associated with the message based at least in part on transmitting the indication of the repetition factor or the indication of applying DMRS appended.

[0013] In general, the various types include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as fully described herein with reference to the accompanying drawings and description and as shown by means of the accompanying drawings and description.

[0014] The features and technical advantages of examples based on the content of this application have been summarized quite extensively above in order to provide a better understanding of the specific implementation described below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as the content of this application. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and operation) and the associated advantages will be better understood when considered in conjunction with the accompanying drawings, based on the description below. Each of the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to limit the scope of the claims.

[0015] Although various forms have been described herein by way of example, it will be understood by those skilled in the art to which this invention pertains that such forms can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some forms can be implemented via integrated chip embodiments and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, or AI-enabled devices). Forms can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating the described forms and features may include additional components and features for the implementation and practice of the claimed and described forms. For example, the transmission and reception of wireless signals may include multiple components (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or accumulators) for analog and digital purposes. The patterns described herein are intended to be implemented in a wide variety of devices, components, systems, distributed arrangements, or end-user devices with different sizes, shapes, and constructions.

Implementation Method

[0024] Various forms of the present invention are described more fully below with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and should not be construed as limited to any particular structure or function provided herein. Rather, these forms are provided so that the present invention will be comprehensive and complete, and will fully convey the scope of the present invention to those skilled in the art to which it pertains. Based on the teachings herein, those skilled in the art to which the present invention pertains should understand that the scope of the present invention is intended to cover any form of the present invention disclosed herein, whether that form is implemented independently of any other form of the present invention or in combination with any other form. For example, an apparatus or a method may be implemented using any number of forms set forth herein. Furthermore, the scope of the present invention is intended to cover such apparatuses or methods practiced using structures, functions, or structures and functions other than those set forth herein or different from those set forth herein. It should be understood that any form of the content of this case as disclosed herein may be represented by one or more elements of the claim.

[0025] Various devices and techniques will now be used to provide several embodiments of a telecommunications system. These devices and techniques will be described in detail below and illustrated in the accompanying drawings, in the form of various blocks, modules, components, circuits, steps, programs, algorithms, etc. (collectively referred to as "elements"). 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 entire system.

[0026] It should be noted that although this document may use terms commonly associated with 5G or NR radio access technology (RAT) to describe the various forms, the various forms of the content herein may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0027] Figure 1 is a diagram illustrating an example of a wireless network 100 according to the present invention. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, etc. The wireless network 100 may include multiple base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), Access Point, Transmit / Receive Point (TRP), etc. Each BS can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may represent the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0028] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a closed user group (CSG)). A BS for macrocells can be referred to as a macro BS. A BS for picocells can be referred to as a pico BS. A BS for femtocells can be referred to as a femto BS or a home BS. In the example shown in Figure 1, BS 110a can be a macro BS for macrocell 102a, BS 110b can be a pico BS for picocell 102b, and BS 110c can be a femto BS for femtocell 102c. A BS can support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB" and "cell" are used interchangeably in this document.

[0029] In some states, the cells may not be stationary, and the geographic area of ​​the cells may move depending on the location of the active BS. In some states, BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0030] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE capable of relaying transmissions for other UEs. In the example shown in Figure 1, the relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. The relay BS may also be referred to as a relay station, relay base station, repeater, etc.

[0031] Wireless network 100 may be a heterogeneous network comprising different types of BSs (such as macro BS, pico BS, femto BS, repeater BS, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs may have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and repeater BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0032] The network controller 130 can be coupled to a group of BSs and can provide coordination and control for these BSs. The network controller 130 can communicate with the BSs via backhaul. The BSs can also communicate with each other directly or indirectly, for example, via wireless or wired backhaul.

[0033] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, user unit, station, etc. UE may be a cellular telephone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop, wireless telephone, wireless loop (WLL) station, tablet device, camera, gaming device, laptop, smart computer, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music or video device, or satellite wireless unit, etc.), vehicle component or sensor, smart instrument / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media.

[0034] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered customer premises equipment. UE 120 can be included within a housing that houses the components of UE 120 (such as processor components and / or memory components). In some cases, the processor components and memory components can be coupled together. For example, processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0035] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0036] In some configurations, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, or vehicle-to-infrastructure (V2I) protocols, etc.) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations elsewhere herein described as being performed by base station 110.

[0037] Devices of the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices of the wireless network 100 can communicate using an operating band with a first frequency range (FR1) (which can span from 410 MHz to 7.125 GHz), and / or can communicate using an operating band with a second frequency range (FR2) (which can span from 24.25 GHz to 52.6 GHz). The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequencies (IFs). Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "below 6 GHz" band. Similarly, FR2 is generally referred to as the "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) that is designated as the "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise explicitly stated, it should be understood that the terms "below 6 GHz" and the like (if used herein) can broadly refer to frequencies below 6 GHz, frequencies within FR1, and / or intermediate frequencies (e.g., above 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that the terms "millimeter wave" and the like (if used herein) can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequencies (e.g., below 24.25 GHz). It is anticipated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0038] In some configurations, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive an indication of a repetition factor associated with a message or an indication to apply a demodulation reference signal (DMRS) to the message for joint channel estimation; and transmit a phase tracking reference signal (PTRS) associated with the message, at least in part based on receiving the indication of the repetition factor or the indication to apply the DMRS. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0039] In some configurations, base station 110 may include communication manager 150. As described in more detail elsewhere herein, communication manager 150 may send an indication of a repetition factor associated with a message or an indication of applying DMRS appendages to the message for joint channel estimation; and transmit PTRS associated with the message based at least in part on sending the indication of the repetition factor or the indication of applying DMRS appendages. Additionally or alternatively, communication manager 150 may perform one or more other operations described herein.

[0040] As noted above, Figure 1 is provided as an example. Other examples may differ from those described with respect to Figure 1.

[0041] Figure 2 is a diagram illustrating an example of communication between base station 110 and UE 120 in wireless network 100 according to the present invention. Base station 110 may be equipped with T antennas 234a to 234t, and UE 120 may be equipped with R antennas 252a to 252r, wherein generally, T ≥ 1 and R ≥ 1.

[0042] At base station 110, transmitting processor 220 can receive data for one or more UEs from data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on the Channel Quality Indicator (CQI) received from each UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Transmitting processor 220 can also process system information (e.g., semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, permission and / or upper-layer signaling), and provide management burden symbols and control symbols. Transmitting processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or DMRS) and synchronization signals (e.g., primary synchronization signal (PSS) or secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, management burden symbols, and / or reference symbols, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can (e.g., for OFDM) process its corresponding output symbol stream to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t respectively.

[0043] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can (e.g., for OFDM) further process the input sample to obtain received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data slot 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine parameters such as the Reference Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Received Quality (RSRQ), and / or CQI. In some configurations, one or more components of the UE 120 may be included in the housing 284.

[0044] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include one or more devices, such as those in the core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0045] The antenna (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included in the following: one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, etc. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or multiple antenna elements within housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements coupled to one or more transmitting and / or receiving components (such as one or more components of FIG. 2).

[0046] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmitting processor 264 can be pre-encoded (if applicable) by TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some embodiments, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some embodiments, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receiver processor 258, transmitter processor 264 and / or TX MIMO processor 266. The transceiver may be configured by a processor (e.g., controller / processor 280) and memory 282 to perform various forms of any of the methods described herein (e.g., as described with reference to Figures 5-7).

[0047] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide decoded data to data slot 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some embodiments, modulator and demodulator (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some embodiments, base station 110 includes transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220 and / or TX MIMO processor 230. The transceiver may be configured by a processor (e.g., controller / processor 240) and memory 242 to perform various methods described herein (e.g., as described with reference to Figures 5-7).

[0048] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or any other component in FIG. 2 may execute one or more techniques associated with PTRS activation based on repeating instructions or DMRS accompanying instructions, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or any other component in FIG. 2 may execute or direct the operation of, for example, program 600 of FIG. 6, program 700 of FIG. 7, and / or other programs as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some embodiments, memory 242 and / or memory 282 may include non-transitory computer-readable media storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when one or more instructions are executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), they may cause one or more processors, UE 120, and / or base station 110 to execute or instruct the operation of, for example, program 600 of FIG. 6, program 700 of FIG. 7, and / or other programs as described herein. In some cases, the execution instructions may include execution instructions, translation instructions, compilation instructions, and / or interpretation instructions, etc.

[0049] In some configurations, UE 120 includes: units for receiving an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and / or units for transmitting PTRS associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying DMRS appended. Units for UE 120 to perform the operations described herein may include, for example, one or more of the following: communication manager 140, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, and / or memory 282.

[0050] In some embodiments, base station 110 includes: units for transmitting an indication of a repetition factor associated with a message or an indication of applying DMRS appended to the message for joint channel estimation; and / or units for transmitting PTRS associated with the message based at least in part on the indication of transmitting the repetition factor or the indication of applying DMRS appended. Units for base station 110 to perform the operations described herein may include, for example, one or more of the following: communication manager 150, transmit processor 220, TX MIMO processor 230, modulator 232, antenna 234, demodulator 232, MIMO detector 236, receive processor 238, controller / processor 240, memory 242, and / or scheduler 246.

[0051] Although the blocks in Figure 2 are shown as different components, the functions described above with respect to these blocks can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be performed by or under the control of the controller / processor 280.

[0052] As noted above, Figure 2 is provided as an example. Other examples may differ from those described with respect to Figure 2.

[0053] Figure 3 is a diagram illustrating an example 300 of a physical channel and a reference signal in a wireless network according to the present invention. As shown in Figure 3, the downlink channel and the downlink reference signal can carry information from the base station 110 to the UE 120, and the uplink channel and the uplink reference signal can carry information from the UE 120 to the base station 110.

[0054] As shown in the figure, the downlink channel may include an entity downlink control channel (PDCCH) carrying downlink control information (DCI), an entity downlink shared channel (PDSCH) carrying downlink data, or an entity broadcast channel (PBCH) carrying system information, etc. In some configurations, PDSCH communication may be scheduled by PDCCH communication. As further shown, the uplink channel may include an entity uplink control channel (PUCCH) carrying uplink control information (UCI), an entity uplink shared channel (PUSCH) carrying uplink data, or an entity random access channel (PRACH) for initial network access, etc. In some configurations, UE 120 may send acknowledgment (ACK) or negative acknowledgment (NACK) feedback (e.g., ACK / NACK feedback or ACK / NACK information) in the UCI on the PUCCH and / or PUSCH.

[0055] As further shown, the downlink reference signal may include a synchronization signal block (SSB), a channel state information (CSI) reference signal (CSI-RS), a DMRS, a positioning reference signal (PRS), or a PTRS, etc. As also shown, the uplink reference signal may include a probe reference signal (SRS), a DMRS, or a PTRS, etc.

[0056] The SSB can carry information for initial network acquisition and synchronization, such as PSS, SSS, PBCH, and PBCH DMR. The SSB is sometimes referred to as the synchronization signal / PBCH (SS / PBCH) block. In some configurations, base station 110 can transmit multiple SSBs on multiple corresponding beams, and the SSB can be used for beam selection.

[0057] The CSI-RS can carry information for downlink channel estimation (e.g., downlink CSI acquisition), which can be used for scheduling, link self-adjustment, or beam management. Base station 110 can configure a CSI-RS set for UE 120, and UE 120 can measure the configured CSI-RS set. Based at least in part on the measurement, UE 120 can perform channel estimation and can report channel estimation parameters to base station 110 (e.g., in the CSI report), such as CQI, precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), layer indicator (LI), rank indicator (RI), or RSRP. Base station 110 can use the CSI report to select transmission parameters for downlink communication to UE 120, such as the number of transport layers (e.g., rank), precoding matrix (e.g., precoder), MCS, or refined downlink beams (e.g., using a beam refinement procedure or beam management procedure).

[0058] The DMRS may carry information used to estimate radio channels for demodulating associated physical channels (e.g., PDCCH, PDSCH, PBCH, PUCCH, or PUSCH). The design and mapping of the DMRS may be specific to the physical channels for which it is estimated. The DMRS is UE-specific, may be beamformed, may be restricted to scheduled resources (e.g., not transmitted over broadband), and may only be transmitted when necessary. As shown, the DMRS is used for both downlink and uplink communications.

[0059] The PTR can carry information for compensating for oscillator phase noise. Typically, phase noise increases with the oscillator carrier frequency. Therefore, the PTRS can be used at high carrier frequencies (such as millimeter-wave frequencies) to mitigate phase noise. The PTRS can be used to track the phase of the local oscillator and enable suppression of phase noise and common phase error (CPE). As shown, the PTRS is used for downlink communication (e.g., on the PDSCH) and uplink communication (e.g., on the PUSCH).

[0060] The PRS may carry information for enabling timing or ranging measurements of the UE 120 based on signals transmitted by base station 110, to improve Observed Time Difference of Arrival (OTDOA) positioning performance. For example, the PRS may be a pseudo-random quadrature phase-shift keying (QPSK) sequence mapped in a diagonal pattern, with shifts in frequency and time to avoid conflicts with cell-specific reference signals and control channels (e.g., PDCCH). Typically, the PRS may be designed to improve the detectability of the UE 120, which may need to detect downlink signals from multiple neighboring base stations to perform OTDOA-based positioning. Therefore, the UE 120 may receive the PRS from multiple cells (e.g., a reference cell and one or more neighboring cells) and may report the Reference Signal Time Difference (RSTD) based on the OTDOA measurements associated with the PRS received from the multiple cells. In some cases, base station 110 can then calculate the location of UE 120 based on RSTD measurements reported by UE 120.

[0061] The SRS can carry information for uplink channel estimation, which can be used for scheduling, link self-adjustment, precoder selection, or beam management, etc. Base station 110 can configure one or more SRS resource sets for UE 120, and UE 120 can transmit SRS on the configured SRS resource sets. The SRS resource sets can have configured uses, such as uplink CSI acquisition, downlink CSI acquisition for interoperability-based operations, uplink beam management, etc. Base station 110 can measure the SRS, can perform channel estimation at least partially based on the measurement, and can use the SRS measurement to configure communication with UE 120.

[0062] As noted above, Figure 3 is provided as an example. Other examples may differ from those described with respect to Figure 3.

[0063] Figure 4 is a diagram illustrating an example 400 of assigning PTRS and other signals and channels to resource elements in accordance with the contents of this case.

[0064] Figure 4 illustrates the PTRS pilot signal (also known as the PTRS pilot tone) for an orthogonal frequency division multiplexing (CP-OFDM) communication system with a cyclic prefix. The PTRS pilot signal can be continuous (as shown) or discontinuous in the time domain. For UE 120, the PTRS signal can occupy one or more tones based at least in part on the scheduled bandwidth, frequency domain resource allocation size (e.g., resource block (RB) allocation size), MCS, signal-to-noise ratio (SNR), interference level, port mapping, and / or another attribute that may affect the quality of the received signal. In the frequency domain, the tone can be referred to as a subcarrier or resource element (RE).

[0065] UE 120 and / or base station 110 may use the PTRS pilot signal for phase tracking, phase estimation, and / or correction of oscillator phase noise, for example, for millimeter-wave communication. The PTRS may be embedded in a PDSCH resource configuration or PUSCH allocation. In some cases, up to two PTRS ports may be configured for downlink communication (e.g., within a PDSCH resource configuration), and up to two PTRS ports may be configured for uplink communication (e.g., within a PUSCH resource configuration). For CP-OFDM communication, the PTR may use the same sequence as the corresponding DMRS, which may be a Gold sequence (e.g., a QPSK modulated Gold sequence). In some cases, the base station may indicate to the UE (e.g., via DMRS-PTRS association indicated in downlink control information) the correspondence between PTRS ports and DMRS ports. In some cases, for uplink communication, a larger number of DMRS ports (e.g., up to four DMRS ports) may be configured for the UE compared to the number of PTRS ports configured for the UE (e.g., up to two PTRS ports). For example, for a given RB, if PTRS is enabled or present, a PTRS port can be mapped to a subcarrier carrying one or more DMRS ports (e.g., a group of DMRS ports corresponding to the PTRS port, as indicated in the DMRS-PTRS association).

[0066] A higher SNR in the PTRS pilot signal can provide a more accurate phase error estimate. Therefore, in some cases, the PTRS pilot signal can be located in a tone with good channel conditions, high SNR, and / or high signal-to-interference-plus-noise ratio (SINR), which can lead to more accurate phase tracking at UE 120. Increasing the number of PTRS pilot signals can provide a more accurate phase error estimate. For example, increasing the number of PTRS pilot signals can allow averaging of thermal noise over a larger number of PTRS pilot signals. Furthermore, increasing the number of PTRS pilot signals can allow the use of frequency diversity.

[0067] However, using a larger number of PTRS pilot signals may increase the management burden. Furthermore, for a given number of PTRS pilot signals in the scheduling bandwidth, the gain from increasing the number of PTRS pilot signals may saturate. Therefore, a UE 120 with a larger scheduling bandwidth can use a sparser PTRS frequency domain pattern. Conversely, a UE 120 with a smaller scheduling bandwidth can use a denser PTRS frequency domain pattern. Compared to DMRS, PTR can be relatively sparse in frequency. For example, one PTRS RE can be used in every 2 or 4 RBs, while 4 or 6 DMRS REs can be used in each RB. As shown in Figure 4, PTRS can be relatively dense in time compared to DMRS.

[0068] For a given scheduling bandwidth, the number of PTRS pilot signals required to achieve a specific performance requirement (e.g., a bit error rate of less than 0.5%, 1%, 2%, or another threshold) can depend on a number of factors, such as channel conditions, UE speed, UE capabilities, UE processing power, UE battery power, mobility, and other factors that can affect the performance of the communication system. A communication system with too few PTRS signals may result in more retransmissions due to channel errors, which reduces throughput. A system with too many PTRS signals may utilize valuable system bandwidth to minimize the channel error rate.

[0069] Some communication systems may use a fixed PTRS pattern (e.g., in the time and / or frequency domains), such as the PTRS pattern shown in Figure 4. In this case, the density of the PTRS pilot signal can be fixed in both the number of PTRS pilot signals and the resource elements carrying the PTRS pilot signals. Alternatively, some communication systems may use a flexible PTRS configuration, in which the resource elements carrying the PTRS pilot tone can be flexibly configured.

[0070] In some cases, the Radio Resource Control (RRC) configuration may indicate one or more density tables. For example, the RRC configuration may indicate a PTRS time-domain density table and a PTRS frequency-domain density table. The RRC configuration may indicate a first set of thresholds for the PTRS time-domain density table and a second set of thresholds for the PTRS frequency-domain density table. In some instances, the first and second threshold sets may be defined independently for each configured bandwidth portion (e.g., in the RRC configuration) (e.g., using dedicated RRC signaling for uplink and downlink). In some cases, the UE may report one or more thresholds to the base station. For example, for a given carrier frequency, the UE may report (e.g., using UE capability information or UE capability signaling) one or more thresholds for each subcarrier interval of the data channel applicable to the carrier frequency (for the first and / or second threshold sets). For example, the UE can determine one or more thresholds (for a first threshold set and / or a second threshold set) based on the phase noise characteristics at different subcarrier intervals (e.g., assuming the use of the MCS with the highest modulation order among the MCSs supported by the UE).

[0071] In some cases, the PTRS time-domain density table can indicate different time-domain densities for PTRS, wherein the time-domain density is based on the MCS used for data communication. In other words, the time-domain density for PTRS can be dependent on the MCS used for data communication scheduling. The time-domain density can indicate the offset between OFDM symbols that will be used as PTRS symbols in the time domain (e.g., time-domain density 4 can indicate that each fourth OFDM symbol will be a PTRS symbol, and time-domain density 2 can indicate that each second OFDM symbol will be a PTRS symbol). A first threshold set for the PTRS time-domain density table can indicate a set of MCS indices. For example, the MCS table (e.g., defined via a radio communication standard such as 3GPP or otherwise fixed) can indicate index values ​​for different MCSs. The MCS table can indicate the modulation order, code rate (e.g., target code rate), and / or spectral efficiency of the MCS for each MCS index value. The first threshold set for the PTRS time-domain density table can be based on the MCS table being used by the UE. For example, a base station can indicate the following: the first MCS threshold (ptrs-MCS1) for the first MCS index, the second MCS threshold (ptrs-MCS2) for the second MCS index, the third MCS threshold (ptrs-MCS3) for the third MCS index, and / or the fourth MCS threshold (ptrs-MCS4) for the fourth MCS index, etc. An example PTRS time-domain density table is illustrated below via Table 1. Scheduled MCS Time density MCS < ptrs-MCS1 PTRS does not exist ptrs-MCS1 ≦ MCS < ptrs-MCS2 4 ptrs-MCS2 ≦ MCS < ptrs-MCS3 2 ptrs-MCS3 ≦ MCS < ptrs-MCS4 1 Table 1

[0072] As shown in Table 1, if the scheduled MCS (e.g., the MCS indicating the UE's use for data communication) is between the first MCS threshold (ptrs-MCS1) and the second MCS threshold (ptrs-MCS2), then the time-domain density used for PTRS can be 4 (e.g., indicating that each fourth symbol is a PTRS symbol). If the scheduled MCS has an index value less than the first MCS threshold, the UE can assume that PTRS will not be transmitted. As shown in Table 1, as the index value of the scheduled MCS increases, the number of symbols that will become PTRS symbols increases (e.g., from each fourth symbol to each second symbol, and then to each symbol). The frequency-domain density can indicate the number of subcarriers or tones that will become PTRS symbols in the time-domain allocation used for PTRS (e.g., time-domain density 4 can indicate that each fourth symbol will become a PTRS symbol, and time-domain density 2 can indicate that each second symbol will become a PTRS symbol).

[0073] In some cases, the PTRS frequency domain density table can indicate different frequency domain densities for PTRS, where the frequency domain density is based on the scheduled bandwidth (e.g., the number of allocated RBs) for data communication. In other words, the frequency domain density for PTRS can depend on the scheduled bandwidth for data communication. The frequency domain density can indicate the offset between resource blocks that include PTRS subcarriers in the frequency domain (e.g., frequency domain density 4 can indicate that each fourth resource block will include one PTRS subcarrier or tone, and frequency domain density 2 can indicate that each second resource block will include one PTRS subcarrier or tone). A second set of thresholds for the PTRS frequency domain density table can indicate a set of RB thresholds. For example, a base station can indicate (e.g., in an RRC configuration) a first RB threshold (NRB1) and a second RB threshold (NRB2), etc. An example PTRS frequency domain density table is illustrated below via Table 2. Scheduling bandwidth (N) RB ) Frequency density N RB < N RB1 PTRS does not exist N RB1 ≦ N RB < N RB2 2 N RB2 ≦ N RB 4 Table 2

[0074] As shown in Table 2, if the scheduling bandwidth is between the first RB threshold (NRB1) and the second RB threshold (NRB2), the frequency domain density used for PTR can be 2 (e.g., indicating that each second resource block will include one PTR subcarrier or tone). If the scheduling bandwidth is greater than or equal to the second RB threshold (NRB2), the frequency domain density used for PTRS can be 4 (e.g., indicating that each fourth resource block will include one PTRS subcarrier or tone). If the scheduling bandwidth is less than the first RB threshold (NRB1), the UE can assume that PTRS will not be transmitted. As shown in Table 2, the frequency domain density of PTRS can decrease as the size of the scheduling bandwidth (e.g., the number of scheduled resource blocks) increases.

[0075] In some cases, the base station can use higher-layer parameters (e.g., RRC parameters) to indicate the presence of PTRS (e.g., to indicate that PTRS can be transmitted). For example, the base station can use one or more higher-layer parameters to enable the presence of PTRS in uplink and / or downlink communications. For example, the base station can indicate the use of a first parameter (e.g., the DL-PTRS-present information element in the RRC configuration) to enable PTRS for downlink communications. Similarly, the base station can indicate the use of a second parameter (e.g., the UL-PTRS-present information element in the RRC configuration) to enable PTRS for uplink communications. If the base station does not configure higher-layer parameters to indicate the presence or enable of PTRS, the UE can assume that PTRS will not be transmitted for uplink and / or downlink communications. If the base station configures higher-layer parameters to indicate the presence or enable of PTRS, the UE can transmit (e.g., for uplink communications) or receive (e.g., for downlink communications) PTRS based on the time-domain and frequency-domain density of PTRS (e.g., determined using one or more tables as described above). In other words, the presence or activation of PTRS for the channel can be based solely on higher-layer parameters configured by base station 110 (e.g., using RRC signal transmission).

[0076] As noted above, Figure 4 is provided as an example. Other examples may differ from those described with respect to Figure 4.

[0077] In some cases, a transmitter (such as UE 120 or base station 110) may send one or more DMRS to a receiver (such as another UE 120 or base station 110). The design and mapping of the DMRS may be specific to the physical channel on which it is estimated using the DMRS. The DMRS is used for both downlink and uplink communications. The receiver may perform one or more measurements of the DMRS to estimate the physical channel on which one or more communications are transmitted from the transmitter. In this way, the receiver may determine whether the channel quality of the physical channel meets one or more channel quality thresholds, and may use the results from one or more measurements to facilitate the demodulation of communications transmitted on the physical channel.

[0078] In some cases, the transmitter and / or receiver can support DMRS encapsulation across one or more time slots in the time domain. "DMRS encapsulation" can refer to encapsulating or packetizing the same or coherent (phase-coherent) DMRS transmitted at different points in time for channel estimation purposes. That is, when DMRS encapsulation is configured or indicated, the receiver can perform joint or aggregated channel estimation based on DMRS received across multiple time slots, rather than performing channel estimation separately for each time slot based on DMRS received in each individual time slot. DMRS encapsulation may be referred to herein as DMRS aggregation or joint channel estimation. DMRS encapsulation enables the receiver to perform joint channel estimation on DMRS across multiple time slots to improve the accuracy of channel estimation.

[0079] To support DMR accompaniment, the transmitter may be required to maintain phase continuity or phase coherence between DMRSs transmitted by the transmitter. "Phase continuity" or "phase coherence" can mean that the transmitter maintains radio frequency (RF) phase over time after modulation between multiple transmissions (e.g., between multiple DMRSs). For example, to maintain continuity or phase coherence between DMRSs, the transmitter may maintain consistency in the phase relationship between multiple DMRSs transmitted in different time slots. DMRS accompaniment may require phase continuity or phase coherence between DMRs transmitted by the transmitter to allow the receiver to aggregate or accompaniment DMRSs to perform joint channel estimation based on DMRSs received across multiple time slots. When DMRS accompaniment is applied, failure to maintain phase continuity or phase coherence between DMRSs may result in the receiver being unable to perform channel estimation or may lead to inaccurate channel estimation.

[0080] Additionally, in some cases, the transmitter may transmit one or more repetitions of a communication. Repetitions (such as uplink repetitions or downlink repetitions) can be used to improve reliability, for example, for Ultra Reliable Low Latency Communication (URLLC) or for UEs located in geographical areas with poor channel conditions (e.g., cell edges). When repetitions are used, the transmitter repeats the transmission of a communication multiple times. For example, UE 120 may transmit an initial uplink communication, and may repeat (e.g., retransmit) the transmission of that uplink communication once or multiple times. In some cases, the transmitter may be configured or instructed to transmit multiple repetitions of a communication over time and / or across different time slots. As used herein, "repetition" is used to refer to the initial communication and also to repeated transmissions of the initial communication. In a similar manner as described above, it may be beneficial for the transmitter to maintain phase continuity or phase coherence between repetitions to improve channel estimation and / or performance at the receiver. For example, in some cases where joint channel estimation is applied, the base station may only instruct to send repeats for messages, and may not instruct to apply joint channel estimation (e.g., DMRS appendage). However, in some cases, the UE (e.g., it is a transmitter) may be unable to support or maintain phase continuity or phase coherence across multiple repeats or across DMRSs sent by the UE (e.g., due to insufficient UE capabilities or UE RF hardware settings). Therefore, the UE may be unable to maintain phase continuity or phase coherence across multiple repeats or multiple DMRSs, resulting in performance degradation at the base station (e.g., the base station is unable to perform channel estimation), or inaccurate channel estimation (via applying DMRS appendages between DMRSs or repeats with different phases sent by the UE).

[0081] As described in more detail elsewhere herein, a receiver (e.g., a base station or UE) can use PTRS for phase tracking, phase estimation, and / or correction of oscillator phase noise. Therefore, a receiver can be enabled to use PTRS to track phase shifts over multiple transmissions, and correction factors can be applied to compensate for phase shifts to improve communication performance or channel estimation accuracy. However, PTRS is configured and / or enabled to transmit using higher-layer parameters (such as those in RRC configuration). In some cases, DMRS accompaniment and / or repetition of communications can be dynamically indicated. Therefore, when a transmitter is configured to transmit repetition of communications and / or when DMRS accompaniment is configured, the transmitter may not be configured or enabled to transmit PTRS (e.g., because PTRS can be semi-statically configured, while DMRS accompaniment and / or repetition can be dynamically indicated). Furthermore, PTRS can typically be configured for higher frequency bands, such as millimeter-wave bands or FR2 bands. Therefore, when the UE and base station communicate using lower frequency bands, PTRS may not be configured or enabled. However, repeating and / or DMRS accompaniment of communications can be applied at lower frequency bands (such as the FR1 band). Therefore, the receiver may not be enabled to track phase shifts in the transmitter's transmission over time, resulting in reduced communication performance and / or inaccurate channel estimation (e.g., when DMRS accompaniment is applied).

[0082] Some of the techniques and apparatus described herein enable PTRS activation based at least in part on a repetition indication or a DMRS appendage indication. For example, PTRS may be activated conditionally on the presence of repetitions of communication and / or on the application of DMRS appendages between repetitions of communication. For example, a UE may receive an indication of a repetition factor (e.g., indicating the number of repetitions of the message) and / or an indication regarding the application of DMRS appendages to the message for joint channel estimation for a message (e.g., an uplink message or a downlink message). A UE may determine whether PTRS is activated or enabled for a message based at least in part on receiving an indication regarding the message being associated with one or more repetitions and / or DMRS appendages. A UE may transmit (e.g., transmit if the message is an uplink message, or receive if the message is a downlink message) PTRS associated with a message based at least in part on receiving an indication of a repetition factor or an indication regarding the application of DMRS appendages.

[0083] Therefore, the UE and / or base station can be enabled to transmit PTRS at least in part based on message repetition and / or DMRS appendices for the message. Therefore, the base station can be enabled to use PTRS to track phase shifts across different transmissions. Therefore, the base station can be enabled to compensate for phase shifts or phase jumps across transmissions of the UE. Therefore, the base station can improve communication performance and / or increase the accuracy of joint channel estimation at least in part based on using PTRS to track phase shifts across different transmissions and compensate for phase shifts. Furthermore, this reduces the signal delivery management burden that would otherwise exist if the base station dynamically activated PTRS each time it associated a message with repetitive and / or repetitive DMRS appendices.

[0084] Figure 5 is a diagram illustrating an example 500 associated with PTRS activation based at least in part on a repeat instruction or DMRS accompanying instruction, according to the content of this case. As shown in Figure 5, base station 110 and UE 120 can communicate with each other in a wireless network such as wireless network 100.

[0085] As shown in component symbol 505, base station 110 can transmit, and UE 120 can receive, an indication of a repetition factor associated with a message or an indication of applying DMRS appendages to the message for joint channel estimation (e.g., applying DMRS appendages across message repetitions). For example, base station 110 can transmit a DCI indicating that the message will be repeated once or more (e.g., via a repetition factor indication). Alternatively or supplementarily, base station 110 can transmit a DCI indicating that DMRS appendages will be applied across message repetitions. In some cases, the message may be an uplink message (e.g., an uplink data message, such as a PUSCH message). In other cases, the message may be a downlink message (e.g., a downlink data message, such as a PDSCH message).

[0086] As shown in component symbol 510, UE 120 may activate PTRS for a channel at least in part based on receiving an indication of a repetition factor associated with a message and / or an indication of applying DMRS appendages to the message. For example, UE 120 may activate a PTRS presence field or information element at least in part based on receiving an indication of a repetition factor or an indication of applying DMRS appendages to indicate that PTRS is enabled for the message. For example, the PTRS presence field or information element may be a DL-PTRS-present information element (e.g., if the message is a downlink message) or a UL-PTRS-present information element (e.g., if the message is an uplink message). In other words, UE 120 may set the value of the PTRS presence field or information element to a value (e.g., value "1" or another value or entry) indicating that PTRS is enabled or activated for a channel (e.g., an uplink channel or a downlink channel) at least in part based on receiving an indication of a repetition factor or an indication of applying DMRS appendages. For example, scheduling permission for a message (e.g., a DCI message) can indicate that the message will be sent with a repeat and / or that the DMRS will be applied across the message's repeats. Receipt of scheduling permission by UE 120 can cause UE 120 to change the PTRS presence field or information element from indicating that PTRS does not exist or is not enabled for the channel to indicating that PTRS exists or is enabled for the channel.

[0087] In some configurations, UE 120 may activate PTRS only for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold. For example, in some configurations, different copies or duplicates of a message may be associated with different DMRS densities. Alternatively or supplementarily, some copies or duplicates of a message may not include DMRS. As described in more detail elsewhere herein, DMRS can assist in phase tracking and / or channel estimation for data messages. Therefore, UE 120 may activate PTRS only for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold to improve phase tracking for these duplicates or copies. In some configurations, base station 110 may instruct UE 120 to activate PTRS only for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold (e.g., in an RRC configuration). Alternatively or supplementally, wireless communication standards (such as 3GPP) may define or otherwise fix rules that instruct UE 120 to activate PTRS only for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold.

[0088] As indicated by component symbol 515, base station 110 may activate PTRS for a channel, at least in part, based on sending an indication of a repetition factor associated with a message and / or an indication of applying DMRS appendages to the message, in a manner similar to that described in conjunction with component symbol 510. For example, base station 110 may activate a PTRS presence field or information element (e.g., a DL-PTRS-present information element or a UL-PTRS-present information element) at least in part based on sending an indication of a repetition factor or an indication of applying DMRS appendages to indicate that PTRS is enabled or present for the message and / or the channel. Additionally, base station 110 may activate PTRS only for repetitions or copies of messages that are not associated with DMRS or are associated with a DMRS density less than a DMRS density threshold, in a manner similar to that described elsewhere herein.

[0089] Therefore, UE 120 and base station 110 can be enabled to dynamically initiate PTRS presence indication for the channel based at least in part on the transmission or reception of an indication of the repetition factor or an indication of whether to apply DMRS (e.g., by dynamically initiating PTRS via the use of a PTRS presence field or information element, which would otherwise be semi-statically configured, such as via RRC signaling).

[0090] In some configurations, UE 120 and / or base station 110 may initiate PTRS for a channel based at least in part on the satisfaction of one or more triggering conditions (e.g., at least in part on an indication of a repetition factor or an indication regarding the application of DMRS). For example, one or more triggering conditions may include triggering conditions associated with at least one of a frequency range, a frequency band, or a subcarrier spacing. For example, in some configurations, UE 120 and / or base station 110 may initiate PTRS for a channel only for some frequency ranges, some frequency bands, and / or some subcarrier spacings (e.g., at least in part on an indication of a repetition factor or an indication regarding the application of DMRS).

[0091] In some configurations, one or more triggering conditions may include triggering conditions associated with the spectrum configuration associated with the message. For example, the spectrum configuration may indicate that the spectrum is a paired spectrum (e.g., the spectrum is a time-division duplex (TDD) spectrum) or it may indicate that the spectrum is an unpaired spectrum (e.g., the spectrum is a frequency-division duplex (FDD) spectrum). For example, in a TDD spectrum, the time slot pattern may indicate the time gap between uplink time slots (e.g., between time slots configured for uplink communication) and / or between downlink time slots (e.g., between time slots configured for downlink communication). In some configurations, in an FDD spectrum, there may be no time gap between uplink time slots and / or between downlink time slots. As described elsewhere herein, UE 120 may have difficulty maintaining phase coherence or phase continuity over longer time periods and / or over time slots. Therefore, when the spectrum configuration indicates paired spectrum or TDD spectrum, the triggering condition may instruct UE 120 and / or base station 110 to initiate PTRS for the channel (e.g., based at least in part on an indication of the repetition factor or an indication regarding the application of DMRS). In some cases, when the spectrum configuration indicates unpaired spectrum or FDD spectrum, the triggering condition may instruct UE 120 and / or base station 110 not to initiate PTRS for the channel (e.g., based at least in part on an indication of the repetition factor or an indication regarding the application of DMRS).

[0092] As shown in component symbol 520, UE 120 may determine one or more parameters for PTRS. Similarly, as shown in component symbol 525, base station 110 may determine one or more parameters for PTRS. For example, one or more parameters may include time-domain resource density, frequency-domain resource density, time-domain resource start position (e.g., start symbol for PTRS), and / or frequency-domain resource start position (e.g., start RB for PTRS), etc. In some cases, UE 120 and / or base station 110 may determine and / or identify one or more parameters at least in part based on scheduling permission for the message. For example, UE 120 may receive a DCI for scheduling the message. As described elsewhere herein, the DCI may indicate that the message is associated with repetition, and / or may indicate that DMRS should be applied across message repetitions. Additionally, the DCI may indicate one or more parameters for PTRS. For example, the DCI can indicate the time-domain resource density, the frequency-domain resource density, the start position of the time-domain resources, and / or the start position of the frequency-domain resources for the PTRS. In other words, the scheduling permission for messages can explicitly indicate one or more parameters for the PTRS. Base station 110 can determine one or more parameters for the PTRS, and can indicate one or more parameters for the PTRS in the scheduling permission for messages (e.g., in the DCI).

[0093] Additionally or alternatively, UE 120 and / or base station 110 may determine one or more parameters associated with PTRS based at least in part on one or more parameters associated with the message. The one or more parameters associated with the message may include MCS, bandwidth (e.g., the number of RBs allocated for the message), repetition count, DMRS mode, and / or DMRS density, etc. For example, UE 120 and / or base station 110 may determine the temporal resource density for PTRS based at least in part on the MCS to be used for the message (e.g., in a similar manner to that described in conjunction with FIG4). As another example, UE 120 and / or base station 110 may determine the frequency domain resource density of PTRS based at least in part on the scheduling bandwidth used for the message (e.g., the number of RBs allocated for the message) (e.g., in a similar manner to that described in conjunction with FIG4).

[0094] In some configurations, UE 120 and / or base station 110 may determine one or more parameters associated with PTRS based at least in part on one or more parameters and one or more rules associated with the message. For example, if the number of repetitions associated with the message is greater than or equal to a first threshold, UE 120 and / or base station 110 may decide to increase the density of PTRS (e.g., time-domain resource density and / or frequency-domain resource density). For example, a higher number of message repetitions may increase the difficulty of maintaining phase coherence or phase continuity across repetitions of UE 120. Therefore, when the number of repetitions associated with the message is greater than or equal to the first threshold, UE 120 and / or base station 110 may decide to increase the density of PTRS (e.g., time-domain resource density and / or frequency-domain resource density) to improve phase tracking across repetitions.

[0095] As another example, if the density or pattern of the DMRS used for a message indicates that the density of the DMRS is less than or equal to a second threshold, then the UE 120 and / or base station 110 may decide to increase the density of the PTRS (e.g., time-domain resource density and / or frequency-domain resource density). For example, as described in more detail elsewhere herein, the DMRS can assist in phase tracking and / or channel estimation for data messages. However, when the density of the DMRS used for a message (e.g., time-domain resource density and / or frequency-domain resource density) is low, the density of the PTRS can be increased to improve phase tracking. Therefore, when the density of the DMRS used for a message is less than or equal to the second threshold, the UE 120 and / or base station 110 may decide to increase the density of the PTRS (e.g., time-domain resource density and / or frequency-domain resource density) to improve phase tracking across repetitions.

[0096] In some configurations, UE 120 and / or base station 110 may determine that the parameters used for PTRS may be different for different repetitions or copies of the message. For example, as described elsewhere herein, in some configurations, different copies or repetitions of the message may be associated with different DMRS densities. Additionally or alternatively, some copies or repetitions of the message may not include DMRS. Therefore, for repetitions or copies of messages not associated with DMRS or associated with DMRS densities less than a DMRS density threshold (e.g., the DMRS density threshold may be the same as or different from the DMRS density thresholds described elsewhere herein), UE 120 and / or base station 110 may determine a first set of parameters for PTRS. For repetitions or copies of messages associated with DMRS or associated with DMRS densities greater than or equal to a DMRS density threshold, UE 120 and / or base station 110 may determine a second set of parameters for PTRS. For example, for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold, UE 120 and / or base station 110 may determine a first PTRS resource configuration density (e.g., time-domain density and / or frequency-domain density). For duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to a DMRS density threshold, UE 120 and / or base station 110 may determine a second PTRS resource configuration density (e.g., time-domain density and / or frequency-domain density).

[0097] In some configurations, the first PTRS resource configuration density may be greater than the second PTRS resource configuration density. For example, compared to PTRS resource configurations used for duplicates or copies of messages associated with DMRS or with DMRS densities greater than or equal to a DMRS density threshold, UE 120 and / or base station 110 may decide that duplicates or copies of messages not associated with DMRS or associated with DMRS densities less than a DMRS density threshold will be associated with a higher PTRS resource configuration density. In other words, instead of sending only PTRS for duplicates or copies of messages not associated with DMRS or associated with DMRS densities less than a DMRS density threshold, UE 120 and / or base station 110 may decide to increase the PTRS resource configuration density of those duplicates or copies of messages to improve phase tracking. Additionally, UE 120 and / or base station 110 may decide to reduce the PTRS resource configuration density for duplicates or copies of messages associated with or associated with DMRS density greater than or equal to the DMRS density threshold (e.g., compared to the PTRS resource configuration for duplicates or copies of messages not associated with or associated with DMRS density less than the DMRS density threshold) to save resources.

[0098] Therefore, the parameters used for the PTR can be implicitly determined or conditioned on the parameters used for the message. For example, the density of the PTR (e.g., time-domain resource density and / or frequency-domain resource density) can be at least in part based on the number of repetitions associated with the message, the DMRS pattern associated with the message, and / or the DMRS density associated with the message.

[0099] In some states, UE 120 and / or base station 110 may determine that the resource allocation density used for PTRS is non-uniform. For example, UE 120 and / or base station 110 may determine a first PTRS resource allocation density for a first subset of symbols associated with the time-domain resource allocation used for the message. UE 120 and / or base station 110 may determine a second PTRS resource allocation density for a second subset of symbols. In some states, the first resource allocation density is greater than the second resource allocation density, and the first subset of symbols is associated with the edge of the time-domain resource allocation used for PTRS. "Edge of time-domain resource allocation" may represent one or more symbols at the beginning of the time-domain resource allocation and / or one or more symbols at the end of the time-domain resource allocation.

[0100] For example, UE 120 and / or base station 110 may determine that the PTRS resource configuration density (e.g., time-domain resource configuration density and / or frequency-domain resource configuration density) will be higher at the edges of the time-domain resource configuration used for messages. For example, having a higher PTRS resource configuration density (e.g., time-domain resource configuration density and / or frequency-domain resource configuration density) at the beginning and / or end of the time-domain resource configuration used for messages can improve the phase tracking performed by base station 110 and / or UE 120. Therefore, UE 120 and / or base station 110 may determine that the PTRS will have a higher time-domain resource configuration density and / or a higher frequency-domain resource configuration density at the edges of the time-domain resource configuration used for messages. Furthermore, by using a non-uniform resource configuration density for PTRS, resources that would otherwise be used to transmit messages with a higher PTRS resource configuration density across the entire time-domain resource configuration used for messages can be saved.

[0101] As shown in element symbols 530 and 535, UE 120 and base station 110 may transmit PTRS associated with a message, at least in part, based on receiving an indication of a repetition factor or an indication of applying DMRS. As used herein, "transmit" may mean UE 120 sending and base station 110 receiving (e.g., for an uplink message) or UE 120 receiving and base station 110 sending (e.g., for a downlink message). For example, as shown in element symbol 530, if the message is an uplink message (e.g., a PUSCH message), UE 120 may transmit and base station 110 may receive uplink PTRS associated with the message (e.g., the uplink message may include one or more embedded PTRS REs or tones). For example, as described elsewhere herein, base station 110 may monitor PTRS in the uplink message, at least in part, based on initiating PTRS (e.g., according to one or more parameters for PTRS determined by base station 110, as described in more detail elsewhere herein).

[0102] Alternatively, as indicated by element symbol 535, if the message is a downlink message (e.g., a PDSCH message), base station 110 may transmit and UE 120 may receive downlink PTRS associated with the message (e.g., the downlink message may include one or more embedded PTRS REs or tones). For example, as described elsewhere herein, UE 120 may monitor PTRS in the downlink message at least in part based on PTRS activation (e.g., according to one or more parameters for PTRS determined by UE 120, as described in more detail elsewhere herein).

[0103] For example, UE 120 and base station 110 may use one or more parameters associated with PTRS (e.g., time-domain resource density, frequency-domain resource density, time-domain resource start position, and / or frequency-domain resource start position) to transmit PTRS associated with a message. For example, in some configurations, UE 120 and base station 110 may transmit PTRS associated with a message only for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold. In some configurations, UE 120 and base station 110 may use a first resource configuration density to transmit a first PTRS for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold. UE 120 and base station 110 may use a second resource configuration density to transmit a second PTRS for duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to a DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0104] In some configurations, UE 120 and base station 110 may use a first resource configuration density for a first subset of symbols associated with the time-domain resource configuration for the message and a second resource configuration density for a second subset of symbols associated with the symbol set to transmit PTRS associated with the message.

[0105] As shown in component symbol 540, base station 110 can use PTRS transmitted between UE 120 and base station 110 to track phase shifts over time. For example, base station 110 can determine phase shifts or phase jumps between message repetitions based at least in part on PTRS transmitted with the message. Therefore, base station 110 can compensate for the determined phase shifts or phase jumps when performing joint channel estimation. For example, base station 110 can compensate for the determined phase shifts or phase jumps by applying an offset when performing DMRS. Therefore, by enabling base station 110 to track and compensate for phase shifts, the accuracy of joint channel estimation performed by base station 110 can be improved.

[0106] Therefore, UE 120 and / or base station 110 can be enabled to transmit PTRS at least in part based on message repetition and / or DMRS appendices for the message being instructed. Therefore, base station 110 can be enabled to use PTRS to track phase shifts across different transmissions. Therefore, for example, base station 110 can be enabled to compensate for phase shifts or phase jumps across transmissions of UE 120. Therefore, base station 110 can improve communication performance and / or increase the accuracy of joint channel estimation at least in part based on using PTRS to track phase shifts across different transmissions and compensate for phase shifts. Furthermore, this reduces the signal delivery management burden that would otherwise exist if base station 110 dynamically initiated PTRS each time a message was associated with repetition and / or across repetition DMRS appendices.

[0107] As noted above, Figure 5 is provided as an example. Other examples may differ from those described with respect to Figure 5.

[0108] Figure 6 is a diagram illustrating, for example, an example procedure 600 executed by a UE according to the content of this case. Example procedure 600 is an example in which a UE (e.g., UE 120) performs an operation associated with PTRS initiation based on a repeat instruction or a DMRS accompanying instruction.

[0109] As shown in FIG6, in some configurations, procedure 600 may include receiving an indication of a repetition factor associated with a message or an indication of applying DMRS to the message for joint channel estimation (block 610). For example, a UE (e.g., using the communication manager 140 and / or receiving unit 802 illustrated in FIG8) may receive an indication of a repetition factor associated with a message or an indication of applying DMRS to the message for joint channel estimation, as described above.

[0110] As further shown in FIG6, in some configurations, procedure 600 may include transmitting PTRS associated with a message (block 620) based at least in part on receiving an indication of a repetition factor or an indication of applying DMRS accompaniment. For example, a UE (e.g., using the communication manager 140, receiving unit 802, and / or transmitting unit 804 illustrated in FIG8) may transmit PTRS associated with a message based at least in part on receiving an indication of a repetition factor or an indication of applying DMRS accompaniment, as described above.

[0111] Procedure 600 may include additional patterns, such as any single pattern or any combination of patterns described below and / or in conjunction with one or more other patterns described elsewhere in this document.

[0112] In the first state, the message is an uplink message, and transmitting PTRS includes: sending the uplink PTRS associated with the message.

[0113] In the second state, either alone or in combination with the first state, the message is a downlink message, and transmitting PTRS includes receiving downlink PTRS associated with the message.

[0114] In the third state sample, alone or in combination with one or more states in the first and second states sample, the procedure 600 includes: activating the PTRS presence field at least in part based on receiving an indication of the repetition factor or an indication of applying DMRS to indicate that PTRS is enabled for the message.

[0115] In the fourth state sample, receiving an indication of the repetition factor or an indication of applying DMRS, either alone or in combination with one or more of the first to third state samples, includes receiving a DCI for scheduling messages, wherein the DCI indicates one or more parameters associated with PTRS.

[0116] In the fifth state sample, either alone or in combination with one or more states from the first to the fourth state samples, the procedure 600 includes: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of modulation and coding scheme, bandwidth, number of repetitions, DMRS mode, or DMRS density.

[0117] In the sixth state sample, transmitting the PTRS, either alone or in combination with one or more state samples from the first to the fifth state samples, includes: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of time-domain resource density, frequency-domain resource density, time-domain resource start position, or frequency-domain resource start position.

[0118] In the seventh state sample, transmitting PTRS alone or in combination with one or more of the first to sixth state samples includes transmitting PTRS only for repeats or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold.

[0119] In the eighth state sample, transmitting PTRS, either alone or in combination with one or more states from the first to the seventh state samples, includes: transmitting the first PTRS using a first resource configuration density for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold; and transmitting the second PTRS using a second resource configuration density for duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0120] In the ninth state sample, transmitting PTRS, either alone or in combination with one or more of the first to eighth state samples, includes transmitting PTRS using the following: using a first resource configuration density for a first subset of symbols associated with the temporal resource configuration used for the message, and using a second resource configuration density for a second subset of symbols, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with the edge of the temporal resource configuration used for PTRS.

[0121] In the tenth state sample, the transmission of PTRS is based, either alone or in combination with one or more state samples from the first to the ninth state samples, on at least in part on the satisfaction of one or more triggering conditions.

[0122] In the eleventh state sample, either alone or in combination with one or more states from the first to the tenth state samples, one or more triggering conditions include triggering conditions associated with at least one of the frequency range, frequency band, or subcarrier spacing.

[0123] In the twelfth state sample, either alone or in combination with one or more states from the first to the eleventh state samples, one or more triggering conditions include triggering conditions associated with the spectrum configuration associated with the message.

[0124] Although FIG6 illustrates an example block of program 600, in some versions, program 600 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those illustrated in FIG6. Alternatively or additionally, two or more blocks in program 600 may be executed in parallel.

[0125] Figure 7 is a diagram illustrating, for example, an instance program 700 executed by a base station according to the contents of this case. Instance program 700 is an example in which a base station (e.g., base station 110) performs operations associated with PTRS initiation based on repeat instructions or DMRS accompanying instructions.

[0126] As shown in FIG7, in some configurations, procedure 700 may include: sending an indication of a repetition factor associated with a message or an indication of applying DMRS to the message for joint channel estimation (block 710). For example, a base station (e.g., using the communication manager 150 and / or transmitting unit 904 illustrated in FIG9) may send an indication of a repetition factor associated with a message or an indication of applying DMRS to the message for joint channel estimation, as described above.

[0127] As further shown in FIG7, in some configurations, program 700 may include transmitting PTRS associated with a message (block 720) based at least in part on sending an indication of a repetition factor or an indication of applying DMRS accompaniments. For example, a base station (e.g., using the communication manager 150, receiving unit 902, and / or transmitting unit 904 illustrated in FIG9) may transmit PTRS associated with a message based at least in part on sending an indication of a repetition factor or an indication of applying DMRS accompaniments, as described above.

[0128] Procedure 700 may include additional patterns, such as any single pattern or any combination of patterns described below and / or in conjunction with one or more other patterns described elsewhere in this document.

[0129] In the first state, the message is an uplink message, and transmitting PTRS includes receiving the uplink PTRS associated with the message.

[0130] In the second state, either alone or in combination with the first state, the message is a downlink message, and transmitting PTRS includes: sending downlink PTRS associated with the message.

[0131] In the third state sample, either alone or in combination with one or more states in the first and second states sample, the procedure 700 includes: activating the PTRS presence field at least in part based on sending an indication of the repetition factor or an indication of applying DMRS to indicate that PTRS is enabled for the message.

[0132] In the fourth state sample, sending an indication of the repetition factor or an indication of applying DMRS, either alone or in combination with one or more of the first to third state samples, includes sending a DCI for scheduling messages, wherein the DCI indicates one or more parameters associated with PTRS.

[0133] In the fifth state sample, either alone or in combination with one or more states from the first to the fourth state samples, the procedure 700 includes: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of modulation and coding scheme, bandwidth, number of repetitions, DMRS mode, or DMRS density.

[0134] In the sixth state sample, transmitting the PTRS, either alone or in combination with one or more state samples from the first to the fifth state samples, includes: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of time-domain resource density, frequency-domain resource density, time-domain resource start position, or frequency-domain resource start position.

[0135] In the seventh state sample, transmitting PTRS alone or in combination with one or more of the first to sixth state samples includes transmitting PTRS only for repeats or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold.

[0136] In the eighth state sample, transmitting PTRS, either alone or in combination with one or more states from the first to the seventh state samples, includes: transmitting the first PTRS using a first resource configuration density for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold; and transmitting the second PTRS using a second resource configuration density for duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0137] In the ninth state sample, transmitting PTRS, either alone or in combination with one or more of the first to eighth state samples, includes transmitting PTRS using the following: using a first resource configuration density for a first subset of symbols associated with the temporal resource configuration used for the message, and using a second resource configuration density for a second subset of symbols, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with the edge of the temporal resource configuration used for PTRS.

[0138] In the tenth state sample, the transmission of PTRS is based, at least in part, on the satisfaction of one or more triggering conditions, either alone or in combination with one or more state samples from the first to the ninth state samples.

[0139] In the eleventh state sample, either alone or in combination with one or more states from the first to the tenth state samples, one or more triggering conditions include triggering conditions associated with at least one of the frequency range, frequency band, or subcarrier spacing.

[0140] In the twelfth state sample, either alone or in combination with one or more states from the first to the eleventh state samples, one or more triggering conditions include triggering conditions associated with the spectrum configuration associated with the message.

[0141] Although FIG7 illustrates an example block of program 700, in some versions, program 700 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner compared to those illustrated in FIG7. Alternatively or additionally, two or more blocks in program 700 may be executed in parallel.

[0142] FIG8 is a block diagram of an example device 800 for wireless communication. Device 800 may be a UE, or a UE may include device 800. In some embodiments, device 800 includes a receiving component 802 and a transmitting component 804, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 800 can use the receiving component 802 and the transmitting component 804 to communicate with another device 806 (such as a UE, a base station, or another wireless communication device). As further shown, device 800 may include a communication manager 140. Communication manager 140 may include one or more of a decision component 808 and / or a PTRS activation component 810, etc.

[0143] In some embodiments, device 800 may be configured to perform one or more operations described herein in conjunction with FIG. 5. Alternatively or additionally, device 800 may be configured to perform one or more programs described herein, such as program 600 of FIG. 6 or a combination thereof. In some embodiments, device 800 and / or one or more components shown in FIG. 8 may include one or more components of the UE described above in conjunction with FIG. 2. Alternatively or additionally, one or more components shown in FIG. 8 may be implemented within one or more components described above in conjunction with FIG. 2. Alternatively or additionally, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of a component.

[0144] The receiving unit 802 may receive communications from the device 806, such as reference signals, control information, data communications, or combinations thereof. The receiving unit 802 may provide the received communications to one or more other components of the device 800. In some embodiments, the receiving unit 802 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signals to one or more other components of the device 806. In some embodiments, the receiving unit 802 may include one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof of the UE described above in conjunction with FIG. 2.

[0145] The transmitting component 804 can transmit communications to the device 806, such as reference signals, control information, data communications, or combinations thereof. In some embodiments, one or more other components of the device 806 can generate communications and provide the generated communications to the transmitting component 804 for transmission to the device 806. In some embodiments, the transmitting component 806 can perform signal processing on the generated communications (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) and can transmit the processed signals to the device 806. In some embodiments, the transmitting component 804 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof, as described above in conjunction with FIG. 2. In some embodiments, the transmitting component 804 may be co-located with the receiving component 802 in a transceiver.

[0146] The receiving unit 802 may receive an indication of a repetition factor associated with a message or an indication of applying DMRS appendages to the message for joint channel estimation. The receiving unit 802 and / or the transmitting unit 804 may transmit PTRS associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying DMRS appendages.

[0147] The transmitting unit 804 can transmit the uplink PTRS associated with the message. The receiving unit 802 can receive the downlink PTRS associated with the message.

[0148] The determining component 808 can determine one or more parameters associated with the PTRS. The receiving component 802 can receive a DCI that schedules messages, the DCI indicating one or more parameters associated with the PTRS.

[0149] The PTRS activation component 810 may activate the PTRS presence field at least in part based on receiving an indication of the repetition factor or an indication of applying DMRS, to indicate that PTRS is enabled for the message.

[0150] The determining component 808 may determine one or more parameters associated with PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of modulation and coding scheme, bandwidth, number of repetitions, DMRS mode or DMRS density.

[0151] The receiving component 802 and / or the transmitting component 804 may use one or more parameters associated with the PTRS to transmit the PTRS. The receiving component 802 and / or the transmitting component 804 may use a first resource configuration density for a first subset of symbols associated with the time-domain resource configuration used for the message and a second resource configuration density for a second subset of symbols in the symbol set. The receiving component 802 and / or the transmitting component 804 may transmit the PTRS only for duplicates or copies of messages that are not associated with the DMRS or are associated with a DMRS density less than the DMRS density threshold.

[0152] The receiving unit 802 and / or the transmitting unit 804 may use a first resource configuration density to transmit a first PTRS for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold. The receiving unit 802 and / or the transmitting unit 804 may use a second resource configuration density to transmit a second PTRS for duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0153] The number and arrangement of components shown in Figure 8 are provided as examples. In practice, there may be additional components, fewer components, different components, or components arranged in a different manner compared to those shown in Figure 8. Furthermore, two or more components shown in Figure 8 may be implemented within a single component, or a single component shown in Figure 8 may be implemented as multiple distributed components. Additionally or alternatively, a group (one or more) of components shown in Figure 8 may perform one or more functions described as being performed by another group of components shown in Figure 8.

[0154] FIG9 is a block diagram of an example device 900 for wireless communication. Device 900 may be a base station, or a base station may include device 900. In some embodiments, device 900 includes a receiving component 902 and a transmitting component 904, which can communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, device 900 can use the receiving component 902 and the transmitting component 904 to communicate with another device 906 (such as a UE, a base station, or another wireless communication device). As further shown, device 900 may include a communication manager 150. Communication manager 150 may include one or more of a decision component 908 and / or a PTRS activation component 910, etc.

[0155] In some embodiments, device 900 may be configured to perform one or more operations described herein in conjunction with FIG. 5. Alternatively or additionally, device 900 may be configured to perform one or more programs described herein, such as program 700 of FIG. 7 or a combination thereof. In some embodiments, device 900 and / or one or more components shown in FIG. 9 may include one or more components of the base station described above in conjunction with FIG. 2. Alternatively or additionally, one or more components shown in FIG. 9 may be implemented within one or more components described above in conjunction with FIG. 2. Alternatively or additionally, one or more components in the set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of a component.

[0156] The receiving unit 902 may receive communications from the device 906, such as reference signals, control information, data communications, or combinations thereof. The receiving unit 902 may provide the received communications to one or more other components of the device 900. In some embodiments, the receiving unit 902 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.), and may provide the processed signal to one or more other components of the device 906. In some embodiments, the receiving unit 902 may include one or more antennas, demodulators, MIMO detectors, receiver processors, controllers / processors, memory, or combinations thereof from the base station described above in conjunction with FIG2.

[0157] The transmitting component 904 can transmit communications to the device 906, such as reference signals, control information, data communications, or combinations thereof. In some embodiments, one or more other components of the device 906 can generate communications and provide the generated communications to the transmitting component 904 for transmission to the device 906. In some embodiments, the transmitting component 906 can perform signal processing on the generated communications (e.g., filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) and can transmit the processed signals to the device 906. In some embodiments, the transmitting component 904 may include one or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof from the base station described above in conjunction with FIG2. In some embodiments, the transmitting component 904 may be co-located with the receiving component 902 in a transceiver.

[0158] The transmitting unit 904 may transmit an indication of the repetition factor associated with the message or an indication of applying DMRS appendages to the message for joint channel estimation. The receiving unit 902 and / or the transmitting unit 904 may transmit the PTRS associated with the message based at least in part on transmitting the indication of the repetition factor or the indication of applying DMRS appendages.

[0159] The receiving unit 902 can receive the uplink PTRS associated with the message. The transmitting unit 904 can transmit the downlink PTRS associated with the message.

[0160] Decision component 908 can determine one or more parameters associated with PTRS.

[0161] The PTRS activation component 910 may activate the PTRS presence field at least in part based on sending an indication of the repetition factor or an indication of applying DMRS to indicate that PTRS is enabled for the message.

[0162] The transmitting unit 904 can transmit a DCI for scheduling messages, wherein the DCI indicates one or more parameters associated with the PTRS.

[0163] The determining component 908 may determine one or more parameters associated with PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of modulation and coding scheme, bandwidth, number of repetitions, DMRS mode or DMRS density.

[0164] The receiving unit 902 and / or the transmitting unit 904 may use one or more parameters associated with the PTRS to transmit the PTRS. The receiving unit 902 and / or the transmitting unit 904 may transmit the PTRS only for duplicates or copies of messages that are not associated with the DMRS or are associated with a DMRS density less than the DMRS density threshold.

[0165] The receiving unit 902 and / or the transmitting unit 904 may use a first resource configuration density to transmit a first PTRS for duplicates or copies of messages that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold. The receiving unit 902 and / or the transmitting unit 904 may use a second resource configuration density to transmit a second PTRS for duplicates or copies of messages that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0166] The receiving component 902 and / or the transmitting component 904 may transmit PTRS using a first resource configuration density for a first subset of symbols associated with the time-domain resource configuration used for the message and a second resource configuration density for a second subset of symbols.

[0167] The number and arrangement of components shown in Figure 9 are provided as examples. In practice, there may be additional components, fewer components, different components, or components arranged in a different manner compared to those shown in Figure 9. Furthermore, two or more components shown in Figure 9 may be implemented within a single component, or a single component shown in Figure 9 may be implemented as multiple distributed components. Additionally or alternatively, a group (one or more) of components shown in Figure 9 may perform one or more functions described as being performed by another group of components shown in Figure 9.

[0168] The following provides a summary of some aspects of the case:

[0169] State 1: A method of wireless communication performed by a user equipment (UE), comprising: receiving an indication of a repetition factor associated with a message or an indication of applying a demodulation reference signal (DMRS) to the message for joint channel estimation; and transmitting a phase tracking reference signal (PTRS) associated with the message based at least in part on receiving the indication of the repetition factor or the indication of applying the DMRS.

[0170] State 2: According to the method of State 1, wherein the message is an uplink message, and wherein transmitting the PTRS includes: sending an uplink PTRS associated with the message.

[0171] State 3: According to the method of State 1, wherein the message is a downlink message, and wherein transmitting the PTRS includes: receiving the downlink PTRS associated with the message.

[0172] State 4: The method according to any one of states 1-3 also includes: activating the PTRS presence field at least in part based on receiving an instruction on the repetition factor or an instruction to apply DMRS, to indicate that PTRS is enabled for the message.

[0173] State 5: The method according to any one of States 1-4, wherein receiving an indication of the repetition factor or an indication of applying DMRS includes: receiving downlink control information (DCI) for scheduling the message, wherein the DCI indicates one or more parameters associated with the PTRS.

[0174] State 6: The method according to any one of states 1-5 also includes: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of the following: modulation and coding scheme, bandwidth, number of repetitions, DMRS mode or DMRS density.

[0175] State 7: The method according to any one of States 1-6, wherein transmitting the PTRS includes: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: time-domain resource density, frequency-domain resource density, time-domain resource start position or frequency-domain resource start position.

[0176] State 8: The method according to any one of States 1-7, wherein transmitting the PTRS comprises: transmitting the PTRS only for duplicates or copies of the message that are not associated with DMRS or are associated with DMRS density less than the DMRS density threshold.

[0177] State 9: The method according to any one of States 1-7, wherein transmitting the PTRS comprises: transmitting a first PTRS using a first resource configuration density for duplicates or copies of the message that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold; and transmitting a second PTRS using a second resource configuration density for duplicates or copies of the message that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0178] State 10: The method according to any one of States 1-9, wherein transmitting the PTRS comprises: transmitting the PTRS using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the message and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with the edge of the time-domain resource configuration for the PTRS.

[0179] State 11: The method according to any one of states 1-10, wherein the transmission of the PTRS is based at least in part on the satisfaction of one or more triggering conditions.

[0180] State 12: According to the method of state 11, wherein the one or more triggering conditions include triggering conditions associated with at least one of frequency range, frequency band or subcarrier spacing.

[0181] State 13: The method according to any one of states 11-12, wherein the one or more triggering conditions include triggering conditions associated with the spectrum configuration associated with the message.

[0182] State 14: A method of wireless communication performed by a base station, comprising: transmitting an indication of a repetition factor associated with a message or an indication of applying a demodulation reference signal (DMRS) to the message for joint channel estimation; and transmitting a phase tracking reference signal (PTRS) associated with the message based at least in part on the indication of transmitting the repetition factor or the indication of applying the DMRS.

[0183] State 15: The method according to State 14, wherein the message is an uplink message, and wherein transmitting the PTRS includes: receiving the uplink PTRS associated with the message.

[0184] State 16: According to the method of State 14, wherein the message is a downlink message, and wherein transmitting the PTRS includes: sending a downlink PTRS associated with the message.

[0185] State 17: The method according to any one of states 14-16 also includes: activating the PTRS presence field at least in part based on sending an indication of the repetition factor or an indication of applying DMRS to indicate that PTRS is enabled for the message.

[0186] Sample 18: The method according to any one of Samples 14-17, wherein sending an indication of the repetition factor or an indication of applying DMRS includes: sending downlink control information (DCI) for scheduling the message, wherein the DCI indicates one or more parameters associated with the PTRS.

[0187] Style 19: The method according to any one of styles 14-18 also includes: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the message, wherein the one or more parameters associated with the message include at least one of the following: modulation and coding scheme, bandwidth, number of repetitions, DMRS mode or DMRS density.

[0188] State 20: The method according to any one of states 14-19, wherein transmitting the PTRS includes: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: time-domain resource density, frequency-domain resource density, time-domain resource start position or frequency-domain resource start position.

[0189] State 21: The method according to any one of States 14-20, wherein transmitting the PTRS comprises: transmitting the PTRS only for duplicates or copies of the message that are not associated with DMRS or are associated with DMRS densities less than the DMRS density threshold.

[0190] State 22: The method according to any one of States 14-20, wherein transmitting the PTRS comprises: transmitting a first PTRS using a first resource configuration density for duplicates or copies of the message that are not associated with DMRS or are associated with DMRS densities less than a DMRS density threshold; and transmitting a second PTRS using a second resource configuration density for duplicates or copies of the message that are associated with DMRS or are associated with DMRS densities greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

[0191] State 23: The method according to any one of states 14-22, wherein transmitting the PTRS comprises: transmitting the PTRS using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the message and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with the edge of the time-domain resource configuration for the PTRS.

[0192] State 24: The method according to any one of states 14-23, wherein the transmission of the PTRS is based at least in part on the satisfaction of one or more triggering conditions.

[0193] State 25: According to the method of State 24, wherein the one or more triggering conditions include triggering conditions associated with at least one of frequency range, frequency band or subcarrier spacing.

[0194] State 26: The method according to any one of states 24-25, wherein the one or more triggering conditions include triggering conditions associated with the spectrum configuration associated with the message.

[0195] State 27: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method according to one or more of states 1-13.

[0196] State 28: A device for wireless communication, including a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more of the states 1-13.

[0197] State 29: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more states 1-13.

[0198] Format 30: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method described according to one or more of formats 1-13.

[0199] Style 32: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more of the styles 1-13.

[0200] Style 33: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the device to perform the method according to one or more of the styles 14-26.

[0201] State 34: A device for wireless communication, including a memory and one or more processors coupled to the memory, the one or more processors being configured to perform the method according to one or more states 14-26.

[0202] State 35: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more states 14-26.

[0203] Format 36: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform the method described in accordance with one or more formats 14-26.

[0204] Sample 37: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more of the samples 14-26.

[0205] The foregoing disclosure provides explanation and description, but is not intended to be exhaustive or to limit the various forms to the precise forms disclosed. Modifications and variations can be made in accordance with the foregoing disclosure, or modifications and variations can be derived from practice with the various forms.

[0206] As used herein, the term "component" is intended to be broadly interpreted as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be broadly interpreted as instructions, instruction sets, code, code fragments, code, programs, subprograms, software modules, applications, software applications, software packages, norms, sub-norms, objects, executable files, threads of execution, programs, and / or functions. As used herein, a processor is implemented in hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not intended to limit the variety. Therefore, this paper describes the operation and behavior of the system and / or methods without referencing any specific software code. It is to be understood that the software and hardware may be designed to implement the system and / or methods based at least in part on the description herein.

[0207] As used herein, depending on the context, satisfying a threshold can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0208] Even if a specific combination of features is described in the request and / or disclosed in the specification, such combinations are not intended to limit the disclosure of each variant. In fact, many features can be combined in a manner not specifically described in the request and / or disclosed in the specification. Although each dependent request listed below may be directly subordinate to only one request, the disclosure of each variant includes combinations of each dependent request with other requests in each of the request sets. As used herein, the phrase "at least one of" in the list of items means any combination of those items, including a single member. For example, "at least one of a, b, or c" is intended to cover a, b, c, ab, ac, bc, and abc, as well as 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).

[0209] None of the elements, actions, or instructions used herein should be construed as essential or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced by the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and may be used interchangeably with “one or more.” Where only one item is anticipated, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term "or" is intended to be inclusive when used in a series, and may be used interchangeably with "and / or" unless otherwise expressly stated (e.g., when used in conjunction with "any" or "only one of them"). [Simplified Explanation of the Diagram]

[0016] A more specific description of the invention, which has been briefly summarized above, can be obtained by referring to various embodiments (some of which are shown in the accompanying drawings) so that the aforementioned features of the invention can be understood in detail. However, it should be noted that the drawings only illustrate certain typical embodiments of the invention and are therefore not intended to limit the scope of the invention, as the description may acknowledge other equally valid embodiments. The same element symbols in different drawings may identify the same or similar elements.

[0017] Figure 1 is a diagram illustrating an example of a wireless network according to the contents of this case.

[0018] Figure 2 is a diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present invention.

[0019] Figure 3 is a diagram illustrating an example of a physical channel and a reference signal in a wireless network according to the present invention.

[0020] Figure 4 is a diagram illustrating an example of assigning a phase tracking reference signal (PTRS) and other signals and channels to a resource element in accordance with the contents of this case.

[0021] Figure 5 is a diagram illustrating an example of PTRS activation associated with at least part of a repeat instruction or demodulation reference signal (DMRS) accompanying instruction, according to the content of this case.

[0022] Figures 6 and 7 are diagrams illustrating example procedures associated with PTRS initiation based at least in part on repeat instructions or DMRS accompanying instructions, according to the contents of this case.

[0023] Figures 8 and 9 are block diagrams of an example device for wireless communication according to the contents of this case. [Biomaterial Storage]

[0211] Domestic storage information (please note in order of storage institution, date, and number): None. International storage information (please note in order of storage country, institution, date, and number): None.

Claims

1. A user equipment (UE) for wireless communication, comprising: One memory; and one or more processors coupled to the memory, the one or more processors being configured to cause the UE to: receive an indication of a repetition factor associated with a data message or an indication of applying a demodulation reference signal (DMRS) to the data message for joint channel estimation; and transmit a phase tracking reference signal (PTRS) associated with the data message, at least in part based on receiving the indication of the repetition factor or the indication of applying the DMRS.

2. The UE according to request item 1, wherein the one or more processors are also configured to cause the UE to: activate a PTRS presence field at least in part based on receiving an indication of the repetition factor or an indication of applying DMRS to indicate that PTRS is enabled for the data message.

3. According to request item 1, wherein in order for the UE to receive an indication of the repetition factor or an indication of applying DMRS, the one or more processors are configured to cause the UE to: receive downlink control information (DCI) for scheduling the data message, wherein the DCI indicates one or more parameters associated with the PTRS.

4. The UE according to request item 1, wherein the one or more processors are also configured to cause the UE to: determine one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the data message, wherein the one or more parameters associated with the data message include at least one of the following: a modulation and coding scheme, a bandwidth, a number of repetitions, a DMRS mode, or a DMRS density.

5. The UE according to request item 1, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the UE to: transmit the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: a time-domain resource density, a frequency-domain resource density, a time-domain resource start position, or a frequency-domain resource start position.

6. The UE according to request item 1, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the UE to: transmit the PTRS only for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold.

7. The UE according to request item 1, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the UE to: transmit a first PTRS using a first resource configuration density for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold; and transmit a second PTRS using a second resource configuration density for duplicates or copies of the data message that are associated with a DMRS or are associated with a DMRS density greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

8. The UE according to request item 1, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the UE to: transmit the PTRS using the following: using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the data message, and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with an edge of the time-domain resource configuration for the PTRS.

9. The UE according to request item 1, wherein the transmission of the PTRS is based at least in part on the satisfaction of one or more triggering conditions, wherein the one or more triggering conditions include at least one of the following: a triggering condition associated with at least one of a frequency range, a frequency band, or a primary carrier interval; or a triggering condition associated with a spectrum configuration associated with the data message.

10. A base station for wireless communication, comprising: One memory; and one or more processors coupled to the memory, the one or more processors being configured to cause the base station to: send an indication of a repetition factor associated with a data message or an indication of applying a demodulation reference signal (DMRS) to the data message for joint channel estimation; and transmit a phase tracking reference signal (PTRS) associated with the data message based at least in part on sending the indication of the repetition factor or the indication of applying the DMRS.

11. The base station according to request item 10, wherein the one or more processors are also configured to cause the base station to: initiate a PTRS presence field at least in part based on sending an instruction on the repetition factor or an instruction on applying DMRS to indicate that PTRS is enabled for the data message.

12. The base station according to request item 10, wherein, in order to send an indication of the repetition factor or an indication of applying DMRS, the one or more processors are configured to cause the base station to: send downlink control information (DCI) for scheduling the data message, wherein the DCI indicates one or more parameters associated with the PTRS.

13. The base station according to claim 10, wherein the one or more processors are also configured to cause the base station to: determine one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the data message, wherein the one or more parameters associated with the data message include at least one of the following: a modulation and coding scheme, a bandwidth, a number of repetitions, a DMRS mode, or a DMRS density.

14. The base station according to request item 10, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the base station to: transmit the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: a time-domain resource density, a frequency-domain resource density, a time-domain resource start position, or a frequency-domain resource start position.

15. The base station according to request item 10, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the base station to: transmit the PTRS only for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold.

16. The base station according to claim 10, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the base station to: transmit a first PTRS using a first resource configuration density for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold; and transmit a second PTRS using a second resource configuration density for duplicates or copies of the data message that are associated with a DMRS or are associated with a DMRS density greater than or equal to the DMRS density threshold, wherein the first resource configuration density is greater than the second resource configuration density.

17. The base station according to request 10, wherein, in order to transmit the PTRS, the one or more processors are configured to cause the base station to: transmit the PTRS using the following: using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the data message, and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with an edge of the time-domain resource configuration for the PTRS.

18. The base station according to request item 10, wherein the transmission of the PTRS is at least in part based on the satisfaction of one or more triggering conditions, wherein the one or more triggering conditions include at least one of the following: a triggering condition associated with at least one of a frequency range, a frequency band, or a primary carrier interval; or a triggering condition associated with a spectrum configuration associated with the data message.

19. A method of wireless communication performed by a user equipment (UE), comprising the steps of: receiving an indication of a repetition factor associated with a data message or an indication of applying a demodulation reference signal (DMRS) to the data message for joint channel estimation; and transmitting a phase tracking reference signal (PTRS) associated with the data message based at least in part on receiving the indication of the repetition factor or the indication of applying the DMRS.

20. The method according to request item 19, wherein the step of receiving an indication of the repetition factor or an indication of applying DMRS includes the following steps: receiving downlink control information (DCI) for scheduling the data message, wherein the DCI indicates one or more parameters associated with the PTRS.

21. The method according to claim 19 also includes the following steps: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the data message, wherein the one or more parameters associated with the data message include at least one of the following: a modulation and coding scheme, a bandwidth, a number of repetitions, a DMRS mode, or a DMRS density.

22. The method of claim 19, wherein the step of transmitting the PTRS includes the following steps: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: a time-domain resource density, a frequency-domain resource density, a time-domain resource start position, or a frequency-domain resource start position.

23. The method of claim 19, wherein the step of transmitting the PTRS includes the following steps: transmitting a first PTRS using a first resource allocation density for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold; and transmitting a second PTRS using a second resource allocation density for duplicates or copies of the data message that are associated with a DMRS or are associated with a DMRS density greater than or equal to the DMRS density threshold, wherein the first resource allocation density is greater than the second resource allocation density.

24. The method according to claim 19, wherein the step of transmitting the PTRS includes the following steps: transmitting the PTRS using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the data message and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with an edge of the time-domain resource configuration for the PTRS.

25. A method of wireless communication performed by a base station, comprising the steps of: transmitting an indication of a repetition factor associated with a data message or an indication of applying a demodulation reference signal (DMRS) to the data message for joint channel estimation; and transmitting a phase tracking reference signal (PTRS) associated with the data message based at least in part on transmitting the indication of the repetition factor or the indication of applying the DMRS.

26. The method according to request item 25, wherein the step of sending an indication of the repetition factor or an indication of applying DMRS includes the following steps: sending downlink control information (DCI) for scheduling the data message, wherein the DCI indicates one or more parameters associated with the PTRS.

27. The method according to claim 25 also includes the following steps: determining one or more parameters associated with the PTRS based at least in part on one or more parameters associated with the data message, wherein the one or more parameters associated with the data message include at least one of the following: a modulation and coding scheme, a bandwidth, a number of repetitions, a DMRS mode, or a DMRS density.

28. The method of claim 25, wherein the step of transmitting the PTRS includes the following steps: transmitting the PTRS using one or more parameters associated with the PTRS, the one or more parameters including at least one of the following: a time-domain resource density, a frequency-domain resource density, a time-domain resource start position, or a frequency-domain resource start position.

29. The method of claim 25, wherein the step of transmitting the PTRS includes the following steps: transmitting the PTRS only for duplicates or copies of the data message that are not associated with a DMRS or are associated with a DMRS density less than a DMRS density threshold.

30. The method according to claim 25, wherein the step of transmitting the PTRS includes the following steps: transmitting the PTRS using a first resource configuration density for a first subset of a symbol set associated with a time-domain resource configuration for the data message and using a second resource configuration density for a second subset of the symbol set, wherein the first resource configuration density is greater than the second resource configuration density, and wherein the first subset of symbols is associated with an edge of the time-domain resource configuration for the PTRS.

Images