WO2022029700A1 - Corrélation de fréquence basée sur un décalage de fréquence - Google Patents

Corrélation de fréquence basée sur un décalage de fréquence Download PDF

Info

Publication number
WO2022029700A1
WO2022029700A1 PCT/IB2021/057234 IB2021057234W WO2022029700A1 WO 2022029700 A1 WO2022029700 A1 WO 2022029700A1 IB 2021057234 W IB2021057234 W IB 2021057234W WO 2022029700 A1 WO2022029700 A1 WO 2022029700A1
Authority
WO
WIPO (PCT)
Prior art keywords
reference signal
downlink
frequency
transmission
subset
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2021/057234
Other languages
English (en)
Inventor
Ahmed Monier Ibrahim Saleh HINDY
Vijay Nangia
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenovo Singapore Pte Ltd
Original Assignee
Lenovo Singapore Pte Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lenovo Singapore Pte Ltd filed Critical Lenovo Singapore Pte Ltd
Publication of WO2022029700A1 publication Critical patent/WO2022029700A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers

Definitions

  • the subject matter disclosed herein relates generally to wireless communications and more particularly relates to frequency correlation based on a frequency offset.
  • high speed vehicles may make and receive transmissions. However, the transmissions made and received may not be synchronized.
  • One embodiment of a method includes receiving, at a user equipment, a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof.
  • the method includes receiving at least one downlink reference signal from at least one network node.
  • the method includes transmitting an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • One apparatus for frequency correlation based on a frequency offset includes a user equipment.
  • the apparatus includes a receiver that: receives a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a singlefrequency network, or a combination thereof; and receives at least one downlink reference signal from at least one network node.
  • the apparatus includes a transmitter that transmits an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • Another embodiment of a method for frequency correlation based on a frequency offset includes transmitting, from a network device, a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof.
  • the method includes transmitting at least one downlink reference signal to a user equipment.
  • the method includes receiving an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • Another apparatus for frequency correlation based on a frequency offset includes a network device.
  • the apparatus includes a transmitter that: transmits a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; and transmits at least one downlink reference signal to a user equipment.
  • the apparatus includes a receiver that receives an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • Figure 1 is a schematic block diagram illustrating one embodiment of a wireless communication system for frequency correlation based on a frequency offset
  • Figure 2 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for frequency correlation based on a frequency offset
  • Figure 3 is a schematic block diagram illustrating one embodiment of an apparatus that may be used for frequency correlation based on a frequency offset
  • Figure 4 is a schematic block diagram illustrating one embodiment of communications for frequency correlation based on a frequency offset
  • Figure 5 is a flow chart diagram illustrating one embodiment of a method for frequency correlation based on a frequency offset
  • Figure 6 is a flow chart diagram illustrating another embodiment of a method for frequency correlation based on a frequency offset.
  • embodiments may be embodied as a system, apparatus, method, or program product. Accordingly, embodiments may take the form of an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-code, etc.) or an embodiment combining software and hardware aspects that may all generally be referred to herein as a “circuit,” “module” or “system.” Furthermore, embodiments may take the form of a program product embodied in one or more computer readable storage devices storing machine readable code, computer readable code, and/or program code, referred hereafter as code. The storage devices may be tangible, non-transitory, and/or non-transmission. The storage devices may not embody signals. In a certain embodiment, the storage devices only employ signals for accessing code.
  • modules may be implemented as a hardware circuit comprising custom very-large-scale integration (“VLSI”) circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI very-large-scale integration
  • a module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
  • Modules may also be implemented in code and/or software for execution by various types of processors.
  • An identified module of code may, for instance, include one or more physical or logical blocks of executable code which may, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may include disparate instructions stored in different locations which, when joined logically together, include the module and achieve the stated purpose for the module.
  • a module of code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices.
  • operational data may be identified and illustrated herein within modules, and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different computer readable storage devices.
  • the software portions are stored on one or more computer readable storage devices.
  • the computer readable medium may be a computer readable storage medium.
  • the computer readable storage medium may be a storage device storing the code.
  • the storage device may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, holographic, micromechanical, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • a storage device More specific examples (a non-exhaustive list) of the storage device would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (“RAM”), a read-only memory (“ROM”), an erasable programmable read-only memory (“EPROM” or Flash memory), a portable compact disc readonly memory (“CD-ROM”), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • Code for carrying out operations for embodiments may be any number of lines and may be written in any combination of one or more programming languages including an object oriented programming language such as Python, Ruby, Java, Smalltalk, C++, or the like, and conventional procedural programming languages, such as the "C" programming language, or the like, and/or machine languages such as assembly languages.
  • the code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server.
  • the remote computer may be connected to the user's computer through any type of network, including a local area network (“LAN”) or a wide area network (“WAN”), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider an Internet Service Provider
  • the code may also be stored in a storage device that can direct a computer, other programmable data processing apparatus, or other devices to function in a particular manner, such that the instructions stored in the storage device produce an article of manufacture including instructions which implement the fiinction/act specified in the schematic flowchart diagrams and/or schematic block diagrams block or blocks.
  • the code may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the code which execute on the computer or other programmable apparatus provide processes for implementing the fiinctions/acts specified in the flowchart and/or block diagram block or blocks.
  • each block in the schematic flowchart diagrams and/or schematic block diagrams may represent a module, segment, or portion of code, which includes one or more executable instructions of the code for implementing the specified logical fimction(s).
  • Figure 1 depicts an embodiment of a wireless communication system 100 for frequency correlation based on a frequency offset.
  • the wireless communication system 100 includes remote units 102 and network units 104. Even though a specific number of remote units 102 and network units 104 are depicted in Figure 1, one of skill in the art will recognize that any number of remote units 102 and network units 104 may be included in the wireless communication system 100.
  • the remote units 102 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (“PDAs”), tablet computers, smart phones, smart televisions (e.g., televisions connected to the Internet), set-top boxes, game consoles, security systems (including security cameras), vehicle on-board computers, network devices (e.g., routers, switches, modems), aerial vehicles, drones, or the like.
  • the remote units 102 include wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like.
  • the remote units 102 may be referred to as subscriber units, mobiles, mobile stations, users, terminals, mobile terminals, fixed terminals, subscriber stations, UE, user terminals, a device, or by other terminology used in the art.
  • the remote units 102 may communicate directly with one or more of the network units 104 via UL communication signals. In certain embodiments, the remote units 102 may communicate directly with other remote units 102 via sidelink communication.
  • the network units 104 may be distributed over a geographic region.
  • a network unit 104 may also be referred to and/or may include one or more of an access point, an access terminal, a base, a base station, a location server, a core network (“CN”), a radio network entity, a Node-B, an evolved node-B (“eNB”), a 5G node-B (“gNB”), a Home Node-B, a relay node, a device, a core network, an aerial server, a radio access node, an access point (“AP”), new radio (“NR”), a network entity, an access and mobility management function (“AMF”), a unified data management (“UDM”), a unified data repository (“UDR”), a UDM/UDR, a policy control function (“PCF”), a radio access network (“RAN”), a network slice selection function (“NSSF”), an operations, administration, and management (“0AM”), a session management function (“SMF”)
  • RAN radio access
  • the network units 104 are generally part of a radio access network that includes one or more controllers communicably coupled to one or more corresponding network units 104.
  • the radio access network is generally communicably coupled to one or more core networks, which may be coupled to other networks, like the Internet and public switched telephone networks, among other networks. These and other elements of radio access and core networks are not illustrated but are well known generally by those having ordinary skill in the art.
  • the wireless communication system 100 is compliant with NR protocols standardized in third generation partnership project (“3GPP”), wherein the network unit 104 transmits using an OFDM modulation scheme on the downlink (“DL”) and the remote units 102 transmit on the uplink (“UL”) using a single-carrier frequency division multiple access (“SC-FDMA”) scheme or an orthogonal frequency division multiplexing (“OFDM”) scheme.
  • 3GPP third generation partnership project
  • SC-FDMA single-carrier frequency division multiple access
  • OFDM orthogonal frequency division multiplexing
  • the wireless communication system 100 may implement some other open or proprietary communication protocol, for example, WiMAX, institute of electrical and electronics engineers (“IEEE”) 802.11 variants, global system for mobile communications (“GSM”), general packet radio service (“GPRS”), universal mobile telecommunications system (“UMTS”), long term evolution (“LTE”) variants, code division multiple access 2000 (“CDMA2000”), Bluetooth®, ZigBee, Sigfoxx, among other protocols.
  • WiMAX institute of electrical and electronics engineers
  • IEEE institute of electrical and electronics engineers
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • UMTS universal mobile telecommunications system
  • LTE long term evolution
  • CDMA2000 code division multiple access 2000
  • Bluetooth® ZigBee
  • ZigBee ZigBee
  • Sigfoxx among other protocols.
  • the network units 104 may serve a number of remote units 102 within a serving area, for example, a cell or a cell sector via a wireless communication link.
  • the network units 104 transmit DL communication signals to serve the remote units 102 in the time, frequency, and/or spatial domain.
  • a remote unit 102 may receive a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a singlefrequency network, or a combination thereof.
  • the remote unit 102 may receive at least one downlink reference signal from at least one network node.
  • the remote unit 102 may transmit an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal. Accordingly, the remote unit 102 may be used for frequency correlation based on a frequency offset.
  • a network unit 104 may transmit a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a singlefrequency network, or a combination thereof.
  • the network unit 104 may transmit at least one downlink reference signal to a user equipment.
  • the network unit 104 may receive an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal. Accordingly, the network unit 104 may be used for frequency correlation based on a frequency offset.
  • Figure 2 depicts one embodiment of an apparatus 200 that may be used for frequency correlation based on a frequency offset.
  • the apparatus 200 includes one embodiment of the remote unit 102.
  • the remote unit 102 may include a processor 202, a memory 204, an input device 206, a display 208, a transmitter 210, and a receiver 212.
  • the input device 206 and the display 208 are combined into a single device, such as a touchscreen.
  • the remote unit 102 may not include any input device 206 and/or display 208.
  • the remote unit 102 may include one or more of the processor 202, the memory 204, the transmitter 210, and the receiver 212, and may not include the input device 206 and/or the display 208.
  • the processor 202 may include any known controller capable of executing computer-readable instructions and/or capable of performing logical operations.
  • the processor 202 may be a microcontroller, a microprocessor, a central processing unit (“CPU”), a graphics processing unit (“GPU”), an auxiliary processing unit, a field programmable gate array (“FPGA”), or similar programmable controller.
  • the processor 202 executes instructions stored in the memory 204 to perform the methods and routines described herein.
  • the processor 202 is communicatively coupled to the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212.
  • the memory 204 in one embodiment, is a computer readable storage medium.
  • the memory 204 includes volatile computer storage media.
  • the memory 204 may include a RAM, including dynamic RAM (“DRAM”), synchronous dynamic RAM (“SDRAM”), and/or static RAM (“SRAM”).
  • the memory 204 includes non-volatile computer storage media.
  • the memory 204 may include a hard disk drive, a flash memory, or any other suitable non-volatile computer storage device.
  • the memory 204 includes both volatile and non-volatile computer storage media.
  • the memory 204 also stores program code and related data, such as an operating system or other controller algorithms operating on the remote unit 102.
  • the input device 206 may include any known computer input device including a touch panel, a button, a keyboard, a stylus, a microphone, or the like.
  • the input device 206 may be integrated with the display 208, for example, as a touchscreen or similar touch-sensitive display.
  • the input device 206 includes a touchscreen such that text may be input using a virtual keyboard displayed on the touchscreen and/or by handwriting on the touchscreen.
  • the input device 206 includes two or more different devices, such as a keyboard and a touch panel.
  • the display 208 may include any known electronically controllable display or display device.
  • the display 208 may be designed to output visual, audible, and/or haptic signals.
  • the display 208 includes an electronic display capable of outputting visual data to a user.
  • the display 208 may include, but is not limited to, a liquid crystal display (“UCD”), a light emitting diode (“FED”) display, an organic light emitting diode (“OEED”) display, a projector, or similar display device capable of outputting images, text, or the like to a user.
  • UCD liquid crystal display
  • FED light emitting diode
  • OEED organic light emitting diode
  • the display 208 may include a wearable display such as a smart watch, smart glasses, a heads-up display, or the like. Further, the display 208 may be a component of a smart phone, a personal digital assistant, a television, a table computer, a notebook (laptop) computer, a personal computer, a vehicle dashboard, or the like.
  • the display 208 includes one or more speakers for producing sound.
  • the display 208 may produce an audible alert or notification (e.g., a beep or chime).
  • the display 208 includes one or more haptic devices for producing vibrations, motion, or other haptic feedback.
  • all or portions of the display 208 may be integrated with the input device 206.
  • the input device 206 and display 208 may form a touchscreen or similar touch-sensitive display.
  • the display 208 may be located near the input device 206.
  • the receiver 212 receives a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; and receives at least one downlink reference signal from at least one network node.
  • the transmitter 210 transmits an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • the remote unit 102 may have any suitable number of transmitters 210 and receivers 212.
  • the transmitter 210 and the receiver 212 may be any suitable type of transmitters and receivers.
  • the transmitter 210 and the receiver 212 may be part of a transceiver.
  • Figure 3 depicts one embodiment of an apparatus 300 that may be used for frequency correlation based on a frequency offset.
  • the apparatus 300 includes one embodiment of the network unit 104.
  • the network unit 104 may include a processor 302, a memory 304, an input device 306, a display 308, a transmitter 310, and a receiver 312.
  • the processor 302, the memory 304, the input device 306, the display 308, the transmitter 310, and the receiver 312 may be substantially similar to the processor 202, the memory 204, the input device 206, the display 208, the transmitter 210, and the receiver 212 of the remote unit 102, respectively.
  • the transmitter 310 transmits a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; and transmits at least one downlink reference signal to a user equipment.
  • the receiver 312 receives an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • high speed rail transportation is expanding and a number of passengers with smart devices like laptops and mobile phones are growing.
  • Current technologies support data ranges from tens of kbps to tens of Mbps which may not be enough to handle demand for high-data-rates and increased reliability and/or latency for on-board broadband services.
  • Some embodiments found herein include enhancements to support high speed train (“HST”) and/or single frequency network (“SFN”) configurations.
  • multiple remote radio heads may be located along a railway and connected to a central unit via fiber.
  • the radio heads may share a same cell identifier (“ID”). If the transmissions from transmission and reception points (“TRPs”) within a cell are synchronized, SFN deployment may enlarge a cell coverage, reduce a frequency of handovers, and achieve transmission diversity and power gain.
  • TRPs transmission and reception points
  • a train may take advantage of simultaneous two RRH transmissions for sessions of at least 4 seconds long (e.g., for high speed rail configurations having a train speed of 500 km/hr).
  • a physical downlink shared channel (“PDSCH”) transmission may be repeated from two TRPs using a single scheduling downlink control information (“DCI”) indicating a single demodulation reference signal (“DMRS”) port and a single transmission configuration indicator (“TCI”) state.
  • DCI scheduling downlink control information
  • DMRS demodulation reference signal
  • TCI transmission configuration indicator
  • a doppler shift for a transmission a first RRH may be different than a doppler shift from a second RRH. If a receiver uses long-term channel statistics associated with an indicated TCI state to estimate the aggregate channel, there may be estimation errors and performance degradation.
  • a single DCI multi-TRP transmission may be used.
  • the DCI may indicate DMRS ports from different code division multiplexing (“CDM”) groups along with a TCI codepoint indicating two TCI states.
  • CDM code division multiplexing
  • TCI codepoint indicating two TCI states.
  • Some layers of a transmitted transport block (“TB”) may be sent from a first RRH and some layers may be sent from a second RRH. This may cause interlayer interference and may not achieve a power gain resulting in no cell coverage increase.
  • a signal -to-noise (“SNR”) ratio gap between signals from two TRPs may lead to constraining a modulation and coding scheme (“MCS”) level (e.g., via a channel quality indicator (“CQI”)) to the worst of both transmissions, assuming a single codeword (“CW”).
  • MCS modulation and coding scheme
  • CQI channel quality indicator
  • Embodiments described herein enable a UE to receive data from the same ports from each TRP of a set of TRPs to achieve a power gain while estimating independently a channel from each TRP to improve performance.
  • a sounding reference signal (“SRS”) transmitted from a UE may be used to provide an estimate of a Doppler shift for each UE-RRH channel link.
  • SRS sounding reference signal
  • a Doppler shift computed at a RRH k be Afk.
  • Doppler shift is reciprocal (e.g., the Doppler shift between two transceivers (e.g., UE and RRH, or transmitter (“TX”) and receiver (“RX”) for time division duplexing (“TDD”) and approximately the same for frequency division duplexing (“FDD”) (e.g., carrier frequency much larger than a duplex spacing)) may be the same regardless of which node is transmitting), RRH k may use the Doppler shift computed for uplink (“UL”) to pre -compensate a downlink (“DL”) Doppler shift. For example, a frequency offset of -Afk may be applied prior to the transmitting the DL reference signals (“RSs”) and data and/or control signaling over a PDSCH and/or a physical downlink control channel (“PDCCH”).
  • RSs DL reference signals
  • PDCCH physical downlink control channel
  • RRH k may pre-compensate a DL Doppler shift via applying a frequency offset of Afj -Afk (e.g., aligning its offset with that of another RRH j), prior to transmitting a DL RSs and data and/or control signaling over a PDSCH and/or a PDCCH.
  • a frequency offset of Afj -Afk e.g., aligning its offset with that of another RRH j
  • a spatial-domain transmit filter used for transmission of a SRS be similar to a spatial-domain filter used for reception of a subsequent tracking reference signal (“TRS”) and/or PDSCH DMRS, which may be applied if a UE is configured with a higher layer parameter related to high speed users (e.g., highSpeedEnhancedDemodulationFlag, highSpeedFlag, or highSpeedEnhDemodFlag-rl7).
  • TRS tracking reference signal
  • PDSCH DMRS a spatial-domain filter used for reception of a subsequent tracking reference signal
  • flags with other names that indicate a high-speed user are not precluded.
  • an equation may be used to indicate a validity of a spatial relation (e.g., if a UE receives DCI triggering an SRS in slot n).
  • the spatial- domain filter used for transmitting a target SRS at slot n + kO may be the same as the receive spatial filter used for the TRS that is received in the time window from slot n + kl up to slot n + k2, where kO, kl, and k2 are arbitrary positive integer values that are either set by a rule or are higher-layer configured, and satisfy kO ⁇ kl ⁇ k2.
  • an equation may be used to indicate a validity of a spatial relation (e.g., if a UE transmits an SRS in slot n).
  • the spatial-domain filter used for receiving a TRS for up to slot n + k3 may be the same as the spatial-domain filter used for transmitting a target SRS, where k3 is a positive integer value.
  • the spatial-domain filter for TRS reception is the same as the spatial-domain filter of a prior SRS transmission if a UE is configured with a flag that indicates high speed (e.g., highSpeedEnhDemodFlag-rl7).
  • the same spatial relation information may apply to all SRS resources in the same SRS resource set.
  • some UEs may track multiple (e.g., up to 8) TRS resource sets simultaneously.
  • each TRS may indicate a different beam transmitted from a network side (e.g., TRP, RRH).
  • Each of the TRSs may be quasi -co-located (“QCLed”) with a synchronization signal (“SS”) and/or physical broadcast channel (“PBCH”) block with respect to Type C, as well as Type-D QCL with a non-zero power (“NZP”) channel state information (“CSI”) RS (“CSI-RS”) configured with higher-layer parameter repetition (e.g., CSI- RS for beam management (e.g., transmitted with a narrower beam width than the SS and/or PBCH block)).
  • SS synchronization signal
  • PBCH physical broadcast channel
  • NZP non-zero power
  • CSI-RS channel state information
  • CSI-RS channel state information RS
  • a UE reports an index indicating a beam with best channel characteristics to a network.
  • the UE reports the index in an indicator called CSI-RS resource indicator (“CRT) in a corresponding CSI report.
  • CRT CSI-RS resource indicator
  • HST high speed train
  • SFN SFN
  • more than one TRS may be transmitted from RRHs in a system so that a UE may estimate a Doppler shift of each RRH independently.
  • SINR signal to interference and noise ratio
  • a UE feeds back one or more CRI values in a CSI report that corresponds to (e.g., has a QCL relationship with) one or more different TRS resources.
  • At least one of the one or more TRS resources may be a periodic TRS or an aperiodic TRS which may be triggered by reception of DCI.
  • a UE feeds back one codepoint referring to one or more CRI values in a CSI report that correspond to (e.g., has a QCL relationship with) one or more different TRS resources.
  • At least one of the one or more TRS resources may be a periodic TRS or an aperiodic TRS which may be triggered by reception of DCI.
  • a UE feeds back a CSI report corresponding to each TRS resource of one or more TRS resources.
  • at least one TRS resource of the one or more TRS resources may be a periodic TRS or an aperiodic TRS which may be triggered by reception of DCI.
  • a UE may be configured with an SRS resource set with one or more SRS resources for SRS transmission.
  • the SRS resource set applicability may be determined by a usage parameter (e.g., 'beamManagemenf).
  • a single SRS resource may be configured.
  • a single port SRS may be configured within an SRS resource.
  • the SRS resource may be configured with spatial relation information (e.g., higher layer parameter spatialRelationlnfo) indicating a spatial relation between a reference RS and a target SRS by indicating an identifier (“ID”) of the reference RS.
  • the reference RS may be a SS and/or PBCH block, CSI-RS, or an SRS configured on the same or different component carrier and/or serving cell and/or bandwidth part as the target SRS.
  • a reference RS may be a SS and/or PBCH block or CSI-RS configured on a serving cell indicated by higher layer parameter servingCellld (e.g., if present), a same serving cell as the target SRS, or an SRS configured on an uplink BWP indicated by a higher layer parameter uplinkBWP, and the serving cell indicated by the higher layer parameter servingCellld (e.g., if present) or the same serving cell as the target SRS.
  • the UE may transmit the target SRS resource with the same spatial domain transmission filter used for the reception of the reference RS.
  • a reference RS is an SRS (e.g., higher layer parameter spatialRelationlnfo containing the ID of a reference 'srs')
  • the UE transmits the target SRS resource with the same spatial domain transmission filter used for the transmission of the reference periodic SRS.
  • the reference RS is a first TRS (e.g., first NZP CSI-RS resource set configured with trs-info - also known as CSI-RS - for tracking).
  • the TRS may be a single antenna port.
  • the first TRS may be transmitted by a first RRH or may be SFN transmitted from one or more RRHs, and may be transmitted without Doppler pre-compensation at the first RRH or any of the RRHs.
  • the UE may perform frequency tracking (e.g., may also perform time tracking) (e.g., estimate frequency offsets, Doppler shift, etc.) based on the first TRS.
  • the UE may transmit the target SRS based on the determined frequency tracking and based on the measurements on the first TRS.
  • the UE may be configured with a second TRS (e.g., second NZP CSI-RS resource set configured with trs-info).
  • the second TRS may be SFN transmitted from one or more RRHs and may be transmitted with Doppler pre-compensation from at least one of the RRHs (e.g., first RRH).
  • the RRH may determine the Doppler pre-compensation value (e.g., sign and magnitude) based on the received target SRS.
  • the UE may receive a DL scheduling assignment DCI scheduling a PDSCH and indicating a codepoint in a TCI state bit field indicating one TCI state with a QCL relationship between the second TRS and the PDSCH DMRS antenna ports.
  • the QCL relation may at least be a QCL Type-A.
  • the TCI state may also indicate a QCL Type-D with the same TRS or another CSI-RS resource (e.g., CSI-RS for beam management or CSI-RS for CSI acquisition).
  • the one or more PDSCH DMRS ports may belong to the same DMRS CDM group.
  • the UE receives the PDSCH based on the indicated TCI state and QCL relationships.
  • the UE may receive the PDSCH assuming an SFN transmission for the PDSCH transmitted over an aggregate or composite channel composed and/or constructed of a channel from the individual RRHs (e.g., Hl from first RRH, H2 from second RRH - Hl + H2).
  • a channel from the individual RRHs e.g., Hl from first RRH, H2 from second RRH - Hl + H2.
  • the first TRS may be transmitted from the first RRH (or first group of RRH, or RRHs with a first (e.g., same) unidirectional antenna beam pattern), and the SFN second TRS transmission includes an TRS transmission from the first RRH with Doppler precompensated, and a TRS transmission from the second RRH (or second group of RRH, or RRHs with a second (e.g., same) using a unidirectional antenna beam pattern, the second unidirectional antenna beam pattern being different than the first unidirectional antenna beam pattern) that is not Doppler pre-compensated.
  • An RRH may comprise bi-directional antennas or only unidirectional antennas.
  • the first TRS and/or the second TRS may be periodic TRS or aperiodic TRS.
  • a received power and/or a SINR from different RRHs may vary significantly. For instance, whenever the UE is within close proximity to one RRH, it may be beneficial that the UE receives control and/or data signaling from this RRH, while the other RRHs are switched off (e.g., with respect to a particular UE). Thereby, it may be beneficial if the network toggles between the SFN mode and non-SFN mode (e.g., dynamic point selection (“DPS”) or single-point transmission throughout a period of communication).
  • DPS dynamic point selection
  • the UE may provide assistance information (e.g., CSI reporting, measurements) to assist the network in selecting between the SFN mode and the non-SFN mode.
  • assistance information e.g., CSI reporting, measurements
  • a transmission mode toggles between a SFN and a non- SFN based on a layer 1 (“LI”) RSRP (“Ll-RSRP”) and/or LI SINR (“LI -SINR”) and/or CQI reported in one or more CSI reports.
  • LI layer 1
  • Ll-RSRP Ll-RSRP
  • LI SINR LI SINR
  • a transmission mode toggles between a SFN and a non- SFN based on a flag included in DCI triggering a UE that indicates signaling with a high-speed UE.
  • a transmission mode toggles between a SFN and a non-SFN based on an SRS RSRP.
  • a transmission mode toggles between a SFN and a non- SFN based on an indicator reported by a UE.
  • an antenna panel may be hardware that is used for transmitting and/or receiving radio signals at frequencies lower than 6 GHz (e.g., frequency range 1 (“FRl”)0, or higher than 6 GHz (e.g., frequency range 2 (“FR2”) or millimeter wave (“mmWave”)).
  • an antenna panel may include an array of antenna elements. Each antenna element may be connected to hardware, such as a phase shifter, that enables a control module to apply spatial parameters for transmission and/or reception of signals. The resulting radiation pattern may be called a beam, which may or may not be unimodal and may allow the device to amplify signals that are transmitted or received from spatial directions.
  • an antenna panel may or may not be virtualized as an antenna port.
  • An antenna panel may be connected to a baseband processing module through a radio frequency (“RF”) chain for each transmission (e.g., egress) and reception (e.g., ingress) direction.
  • RF radio frequency
  • a capability of a device in terms of a number of antenna panels, their duplexing capabilities, their beamforming capabilities, and so forth, may or may not be transparent to other devices.
  • capability information may be communicated via signaling or capability information may be provided to devices without a need for signaling. If information is available to other devices the information may be used for signaling or local decision making.
  • a UE antenna panel may be a physical or logical antenna array including a set of antenna elements or antenna ports that share a common or a significant portion of a radio frequency (“RF”) chain (e.g., in-phase and/or quadrature (“I/Q”) modulator, analog to digital (“A/D”) converter, local oscillator, phase shift network).
  • RF radio frequency
  • the UE antenna panel or UE panel may be a logical entity with physical UE antennas mapped to the logical entity. The mapping of physical UE antennas to the logical entity may be up to UE implementation.
  • Communicating (e.g., receiving or transmitting) on at least a subset of antenna elements or antenna ports active for radiating energy (e.g., active elements) of an antenna panel may require biasing or powering on of an RF chain which results in current drain or power consumption in a UE associated with the antenna panel (e.g., including power amplifier and/or low noise amplifier (“LNA”) power consumption associated with the antenna elements or antenna ports).
  • LNA low noise amplifier
  • an antenna element that is active for radiating energy may be coupled to a transmitter to transmit radio frequency energy or to a receiver to receive radio frequency energy, either simultaneously or sequentially, or may be coupled to a transceiver in general, for performing its intended functionality. Communicating on the active elements of an antenna panel enables generation of radiation patterns or beams.
  • a “UE panel” may have at least one of the following functionalities as an operational role of unit of antenna group to control its transmit (“TX”) beam independently, unit of antenna group to control its transmission power independently, and/pr unit of antenna group to control its transmission timing independently.
  • the “UE panel” may be transparent to a gNB.
  • a gNB or network may assume that a mapping between a UE’s physical antennas to the logical entity “UE panel” may not be changed.
  • a condition may include until the next update or report from UE or include a duration of time over which the gNB assumes there will be no change to mapping.
  • a UE may report its UE capability with respect to the “UE panel” to the gNB or network.
  • the UE capability may include at least the number of “UE panels.”
  • a UE may support UL transmission from one beam within a panel. With multiple panels, more than one beam (e.g., one beam per panel) may be used for UL transmission. In another embodiment, more than one beam per panel may be supported and/or used for UL transmission.
  • an antenna port may be defined such that a channel over which a symbol on the antenna port is conveyed may be inferred from the channel over which another symbol on the same antenna port is conveyed.
  • two antenna ports are said to be quasi co-located (“QCL”) if large-scale properties of a channel over which a symbol on one antenna port is conveyed may be inferred from the channel over which a symbol on another antenna port is conveyed.
  • Large- scale properties may include one or more of delay spread, Doppler spread, Doppler shift, average gain, average delay, and/or spatial receive (“RX”) parameters.
  • Two antenna ports may be quasi co-located with respect to a subset of the large-scale properties and different subset of large-scale properties may be indicated by a QCL Type.
  • a qcl-Type may take one of the following values: 1) 'QCL-TypeA': ⁇ Doppler shift, Doppler spread, average delay, delay spread ⁇ ; 2) 'QCL-TypeB': ⁇ Doppler shift, Doppler spread ⁇ ; 3) 'QCL-TypeC: ⁇ Doppler shift, average delay ⁇ ; and 4) 'QCL-TypeD': ⁇ Spatial Rx parameter ⁇ .
  • spatial RX parameters may include one or more of: angle of arrival (“AoA”), dominant AoA, average AoA, angular spread, power angular spectrum (“PAS”) of AoA, average angle of departure (“AoD”), PAS of AoD, transmit and/or receive channel correlation, transmit and/or receive beamforming, and/or spatial channel correlation.
  • AoA angle of arrival
  • PAS power angular spectrum
  • AoD average angle of departure
  • PAS of AoD transmit and/or receive channel correlation
  • transmit and/or receive beamforming and/or spatial channel correlation.
  • the QCL-TypeA, QCL-TypeB, and QCL-TypeC may be applicable for all carrier frequencies, but the QCL-TypeD may be applicable only in higher carrier frequencies (e.g., mmWave, FR2, and beyond), where essentially a UE may not be able to perform omni-directional transmission (e.g., the UE may need to form beams for directional transmission).
  • the reference signal A is considered to be spatially co-located with reference signal B and the UE may assume that the reference signals A and B can be received with the same spatial filter (e.g., with the same RX beamforming weights).
  • an “antenna port” may be a logical port that may correspond to a beam (e.g., resulting from beamforming) or may correspond to a physical antenna on a device.
  • a physical antenna may map directly to a single antenna port in which an antenna port corresponds to an actual physical antenna.
  • a set of physical antennas, a subset of physical antennas, an antenna set, an antenna array, or an antenna sub-array may be mapped to one or more antenna ports after applying complex weights and/or a cyclic delay to the signal on each physical antenna.
  • the physical antenna set may have antennas from a single module or panel or from multiple modules or panels.
  • the weights may be fixed as in an antenna virtualization scheme, such as cyclic delay diversity (“CDD”).
  • CDD cyclic delay diversity
  • a transmission configuration indicator (“TCI”) state associated with a target transmission may indicate a quasi-collocation relationship between a target transmission (e.g., target RS of demodulation reference signal (“DM-RS”) ports of the target transmission during a transmission occasion) and source reference signals (e.g., synchronization signal block (“SSB”), channel state information reference signal (“CSI-RS”), and/or sounding reference signal (“SRS”)) with respect to quasi co-location type parameters indicated in a corresponding TCI state.
  • a device may receive a configuration of multiple transmission configuration indicator states for a serving cell for transmissions on the serving cell.
  • spatial relation information associated with a target transmission may indicate a spatial setting between a target transmission and a reference RS (e.g., SSB, CSI-RS, and/or SRS).
  • a UE may transmit a target transmission with the same spatial domain filter used for receiving a reference RS (e.g., DL RS such as SSB and/or CSI-RS).
  • a UE may transmit a target transmission with the same spatial domain transmission filter used for the transmission of a RS (e.g., UL RS such as SRS).
  • a UE may receive a configuration of multiple spatial relation information configurations for a serving cell for transmissions on a serving cell.
  • FIG. 4 is a schematic block diagram illustrating one embodiment of communications 400 for frequency correlation based on a frequency offset.
  • the communications 400 include messages transmitted between one or more TRPs 402 and a UE 404.
  • each of the communications 400 may include one or more messages.
  • the one or more TRPs 402 may transmit a higher-layer configuration that indicates operation in a high-speed transmission mode and/or operation in a single-frequency network to the UE 404.
  • the one or more TRPs 402 may transmit at least one downlink reference signal to the UE 404.
  • the UE 404 may transmit an uplink reference signal based on a first subset of the at least one downlink reference signal to the one or more TRPs 402.
  • a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • Figure 5 is a flow chart diagram illustrating one embodiment of a method 500 for frequency correlation based on a frequency offset.
  • the method 500 is performed by an apparatus, such as the remote unit 102.
  • the method 500 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 500 includes receiving 502, at a user equipment, a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof.
  • the method 500 includes receiving 504 at least one downlink reference signal from at least one network node.
  • the method 500 includes transmitting 506 an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a reception frequency of a second subset of the at least one downlink reference signal is based 508 on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the method 500 further comprises reporting a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the method 500 further comprises receiving a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field, wherein the transmission configuration indicator bit field indicates two transmission configuration indicator states, a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource, and a second transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • all ports of a set of ports associated with the physical downlink shared channel demodulation reference signal ports belong to a same code division multiplexing group.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.
  • Figure 6 is a flow chart diagram illustrating one embodiment of a method 600 for frequency correlation based on a frequency offset.
  • the method 600 is performed by an apparatus, such as the network unit 104.
  • the method 600 may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.
  • the method 600 includes transmitting 602, from a network device, a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof.
  • the method 600 includes transmitting 604 at least one downlink reference signal to a user equipment.
  • the method 600 includes receiving 606 an uplink reference signal based on a first subset of the at least one downlink reference signal.
  • a transmission frequency of a second subset of the at least one downlink reference signal is based 608 on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the method 600 further comprises receiving a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the method 600 further comprises transmitting a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field, wherein the transmission configuration indicator bit field indicates two transmission configuration indicator states, a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource, and a second transmission configuration indicator state of the two transmission configuration indication states indicate a quasi-co-location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • all ports of a set of ports associated with the physical downlink shared channel demodulation reference signal ports belong to a same code division multiplexing group.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.
  • a method comprises: receiving, at a user equipment, a higher- layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; receiving at least one downlink reference signal from at least one network node; and transmitting an uplink reference signal based on a first subset of the at least one downlink reference signal; wherein a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the method further comprises reporting a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the method further comprises receiving a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field, wherein the transmission configuration indicator bit field indicates two transmission configuration indicator states, a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource, and a second transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.
  • an apparatus comprises a user equipment.
  • the apparatus further comprises: a receiver that: receives a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; and receives at least one downlink reference signal from at least one network node; and a transmitter that transmits an uplink reference signal based on a first subset of the at least one downlink reference signal; wherein a reception frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the apparatus further comprises a processor that reports a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the receiver receives a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field
  • the transmission configuration indicator bit field indicates two transmission configuration indicator states
  • a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi- co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource
  • a second transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co -location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • all ports of a set of ports associated with the physical downlink shared channel demodulation reference signal ports belong to a same code division multiplexing group.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.
  • a method comprises: transmitting, from a network device, a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single -frequency network, or a combination thereof; transmitting at least one downlink reference signal to a user equipment; and receiving an uplink reference signal based on a first subset of the at least one downlink reference signal; wherein a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the method further comprises receiving a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the method further comprises transmitting a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field, wherein the transmission configuration indicator bit field indicates two transmission configuration indicator states, a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource, and a second transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • all ports of a set of ports associated with the physical downlink shared channel demodulation reference signal ports belong to a same code division multiplexing group.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.
  • an apparatus comprises a network device.
  • the apparatus further comprises : a transmitter that: transmits a higher-layer configuration that indicates operation in a high-speed transmission mode, operation in a single-frequency network, or a combination thereof; and transmits at least one downlink reference signal to a user equipment; and a receiver that receives an uplink reference signal based on a first subset of the at least one downlink reference signal; wherein a transmission frequency of a second subset of the at least one downlink reference signal is based on a frequency offset of the uplink reference signal.
  • the uplink reference signal is a sounding reference signal.
  • the at least one downlink reference signal includes a timing reference signal or a demodulation reference signal for a physical downlink shared channel.
  • a spatial relation of the uplink reference signal is based on the at least one downlink reference signal.
  • a time between the uplink reference signal transmission and the at least one downlink reference signal reception comprises a configured threshold time.
  • the at least one downlink reference signal comprises two tracking reference signal resources.
  • the receiver receives a channel state information reference signal resource indicator corresponding to the two tracking reference signal resources.
  • the transmitter transmits a downlink scheduling assignment downlink control information scheduling a physical downlink shared channel and indicating a codepoint in a transmission configuration indicator bit field
  • the transmission configuration indicator bit field indicates two transmission configuration indicator states
  • a first transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a first tracking reference signal of the two tracking reference signals and a physical downlink shared channel demodulation reference signal resource
  • a second transmission configuration indicator state of the two transmission configuration indicator states indicate a quasi-co-location relationship between a second tracking reference signal of the two tracking reference signals and the physical downlink shared channel demodulation reference signal resource.
  • the quasi-co-location relationship indicated by at least one transmission configuration indicator state of the two transmission configuration indicator states comprises a Type-A relationship, a Type-D relationship, or a combination thereof between a tracking reference signal resource and the physical downlink shared channel demodulation reference signal resource.
  • all ports of a set of ports associated with the physical downlink shared channel demodulation reference signal ports belong to a same code division multiplexing group.
  • the higher-layer configuration comprises downlink control information that indicates whether the user equipment operates in the high-speed transmission mode, a non-high-speed transmission mode, a dynamic point selection mode, or some combination thereof.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des appareils, des procédés et des systèmes sont divulgués pour une corrélation de fréquence basée sur un décalage de fréquence. Un procédé (500) consiste à recevoir (502), au niveau d'un équipement utilisateur, une configuration de couche supérieure qui indique une opération dans un mode de transmission à grande vitesse, une opération dans un réseau monofréquence, ou une combinaison de celles-ci. Le procédé (500) consiste à recevoir (504) au moins un signal de référence de liaison descendante à partir d'au moins un nœud de réseau. Le procédé (500) consiste à transmettre (506) un signal de référence de liaison montante sur la base d'un premier sous-ensemble dudit signal de référence de liaison descendante. Une fréquence de réception d'un second sous-ensemble dudit signal de référence de liaison descendante est basée (508) sur un décalage de fréquence du signal de référence de liaison montante.
PCT/IB2021/057234 2020-08-06 2021-08-06 Corrélation de fréquence basée sur un décalage de fréquence Ceased WO2022029700A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063062327P 2020-08-06 2020-08-06
US63/062,327 2020-08-06

Publications (1)

Publication Number Publication Date
WO2022029700A1 true WO2022029700A1 (fr) 2022-02-10

Family

ID=77398602

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/057234 Ceased WO2022029700A1 (fr) 2020-08-06 2021-08-06 Corrélation de fréquence basée sur un décalage de fréquence

Country Status (1)

Country Link
WO (1) WO2022029700A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2797243A1 (fr) * 2012-02-11 2014-10-29 LG Electronics Inc. Procédé pour la réception de canaux de données sur la liaison descendante dans des systèmes de communication sans fil basés sur une pluralité de cellules, et appareil associé
EP2892169A2 (fr) * 2012-08-31 2015-07-08 LG Electronics Inc. Procédé et dispositif de réception de signal de liaison descendante dans un système de communication sans fil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2797243A1 (fr) * 2012-02-11 2014-10-29 LG Electronics Inc. Procédé pour la réception de canaux de données sur la liaison descendante dans des systèmes de communication sans fil basés sur une pluralité de cellules, et appareil associé
EP2892169A2 (fr) * 2012-08-31 2015-07-08 LG Electronics Inc. Procédé et dispositif de réception de signal de liaison descendante dans un système de communication sans fil

Similar Documents

Publication Publication Date Title
US11799613B2 (en) Channel state information report configuration
US20240137175A1 (en) Configuring tracking reference signal resources
US12402057B2 (en) Configuring repeater-assisted communication
US20240048202A1 (en) Configuring a channel state information report
US20230144547A1 (en) Transmission configuration indicator state association
US20250167850A1 (en) Configuring a channel state information report
US20240236987A1 (en) Configuring csi reporting for multi-trp transmission
US20240187080A1 (en) Communicating based on quasi-collocation properties
US20240333353A1 (en) Channel state information report configuration
WO2023156917A1 (fr) Configuration d'un rapport d'informations d'état de canal
WO2023135576A1 (fr) Communication basée sur une configuration de rafale ssb
WO2022084808A1 (fr) Configuration d'un état d'indicateur de configuration de transmission
US20240056149A1 (en) Channel state information reporting
US20230353209A1 (en) Reporting channel state information based on a transmission hypothesis
US20240056237A1 (en) Configuring a channel state information report for full-duplex communication
WO2023218362A1 (fr) Techniques de mesure et de rapport d'informations d'état de canal
WO2022043918A1 (fr) Configuration basée sur deux signaux de référence de suivi
US20240137167A1 (en) Configuring a channel state information report
WO2022029700A1 (fr) Corrélation de fréquence basée sur un décalage de fréquence
WO2022112974A1 (fr) Transmission de srs en fonction d'un trs reçu
EP4233206A1 (fr) Transmissions permettant de ne pas provoquer d'interférence
US20260100794A1 (en) Reporting a time-domain channel property report

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21756056

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21756056

Country of ref document: EP

Kind code of ref document: A1