Cyclic Prefix Extension for Probe Reference Signal Transmission in NR-U

Abstract

Various aspects of this disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an uplink grant that schedules a Sounding Reference Signal (SRS) transmission and a Physical Uplink Shared Channel (PUSCH) transmission and indicates one or more parameters for determining a cyclic prefix spread. The UE may determine the cyclic prefix spread based at least in part on one or more parameters. The UE may transmit an SRS transmission with the said cyclic prefix spread after performing a Listen-Before-Talk (LBT) procedure. Many other aspects are provided.

Description

Technical Field

[0001] In general, aspects of this disclosure relate to wireless communications and techniques and apparatus for determining cyclic prefix extensions for probe reference signal transmissions in New Radio-Unlicensed (NR-U) communications. Background Technology

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

[0003] Wireless communication networks may include several base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, while an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS 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 aforementioned multiple access technologies have already been adopted in various telecommunications standards to provide a common protocol enabling different user equipment to communicate at the city, country, region, and even global levels. New Radio (NR) (which may also be referred to as 5G) is a set of enhancements to the LTE mobile standard released by the 3rd Generation Partnership Project (3GPP). NR is designed to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and better integrating with other open standards that support beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation, using Orthogonal Frequency Division Multiplexing (OFDM) with a Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink (UL). However, with the continued increase in demand for mobile broadband access, there is a need for further improvements to LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that employ these technologies. Summary of the Invention

[0005] In some aspects, a method of wireless communication performed by a user equipment (UE) may include: receiving an uplink grant that schedules a sounding reference signal (SRS) transmission and a physical uplink shared channel (PUSCH) transmission, and indicating one or more parameters for determining a cyclic prefix spread; determining the cyclic prefix spread based at least in part on the one or more parameters; and transmitting an SRS transmission with the cyclic prefix spread after performing a listen-before-tell (LBT) procedure.

[0006] In some aspects, a wireless communication method performed by a UE may include: receiving an uplink grant, the uplink grant: scheduling a PUSCH transmission and indicating one or more parameters for determining a first cyclic prefix extension; determining a second cyclic prefix extension for an SRS transmission to be transmitted after a timing gap following the PUSCH transmission; and transmitting an SRS transmission with the second cyclic prefix extension after transmitting the PUSCH transmission.

[0007] In some aspects, a method of wireless communication performed by a UE may include: receiving downlink control information (DCI) communication, the DCI communication: scheduling SRS transmissions, and indicating one or more parameters for determining cyclic prefix extension; determining the cyclic prefix extension based at least in part on the one or more parameters; and transmitting an SRS transmission with the cyclic prefix extension after performing an LBT procedure.

[0008] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive an uplink grant that schedules SRS and PUSCH transmissions and indicates one or more parameters for determining a cyclic prefix extension; determine the cyclic prefix extension based at least in part on the one or more parameters; and, after performing an LBT procedure, transmit an SRS transmission with the cyclic prefix extension.

[0009] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive an uplink grant that schedules a PUSCH transmission and indicates one or more parameters for determining a first cyclic prefix extension; determine a second cyclic prefix extension for an SRS transmission to be transmitted after a timing gap following a PUSCH transmission; and transmit an SRS transmission with the second cyclic prefix extension after transmitting a PUSCH transmission.

[0010] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: receive DCI communication that schedules SRS transmissions and indicates one or more parameters for determining a cyclic prefix extension; determine the cyclic prefix extension based at least in part on the one or more parameters; and, after performing an LBT procedure, transmit an SRS transmission with the cyclic prefix extension.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of the UE, the one or more instructions may cause the one or more processors to receive an uplink grant that schedules SRS and PUSCH transmissions and instruct one or more parameters for determining a cyclic prefix extension; determine the cyclic prefix extension based at least in part on the one or more parameters; and, after performing an LBT procedure, transmit an SRS transmission with the cyclic prefix extension.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of the UE, the one or more instructions may cause the processors to receive an uplink grant that schedules a PUSCH transmission and instruct one or more parameters for determining a first cyclic prefix extension; determining a second cyclic prefix extension for an SRS transmission to be transmitted after a timing gap following the PUSCH transmission; and transmitting an SRS transmission with the second cyclic prefix extension after transmitting the PUSCH transmission.

[0013] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of the UE, the one or more instructions may cause the one or more processors to receive DCI communication that schedules SRS transmission and instructs one or more parameters for determining a cyclic prefix extension; determine the cyclic prefix extension based at least in part on the one or more parameters; and, after performing an LBT procedure, transmit an SRS transmission with the cyclic prefix extension.

[0014] In some aspects, an apparatus for wireless communication may include: components for receiving uplink grants, the uplink grants scheduling SRS and PUSCH transmissions and indicating one or more parameters for determining cyclic prefix extension; components for determining the cyclic prefix extension based at least in part on the one or more parameters; and components for transmitting an SRS transmission with the cyclic prefix extension after performing an LBT procedure.

[0015] In some aspects, an apparatus for wireless communication may include: means for receiving a scheduled PUSCH transmission and indicating an uplink grant for determining one or more parameters of a first cyclic prefix extension; means for determining a second cyclic prefix extension for an SRS transmission to be transmitted after a timing gap following the PUSCH transmission; and means for transmitting an SRS transmission with the second cyclic prefix extension after transmitting the PUSCH transmission.

[0016] In some aspects, an apparatus for wireless communication may include: components for receiving DCI communication, the DCI communication scheduling SRS transmission and indicating one or more parameters for determining cyclic prefix extension; components for determining the cyclic prefix extension based at least in part on the one or more parameters; and components for transmitting the SRS transmission with the cyclic prefix extension after performing an LBT process.

[0017] The terms generally include, as described herein with reference to the accompanying drawings and description, and as illustrated in the drawings and description, methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment, and / or processing systems.

[0018] The features and technical advantages of the examples according to this disclosure have been outlined rather extensively above to facilitate a better understanding of the detailed description that follows. 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 performing the same purposes of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and manner of operation) and their associated advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each of the drawings is provided for illustrative and descriptive purposes and not as a definition of limitation of the claims. Attached Figure Description

[0019] To gain a more detailed understanding of the foregoing features of this disclosure, a more specific description of the brief overview can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as the description may allow for other equally valid aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0020] Figure 1 This is a block diagram that conceptually illustrates an example of a wireless communication network according to various aspects of this disclosure.

[0021] Figure 2 This is a block diagram conceptually illustrating an example of a base station and a user equipment (UE) communicating in a wireless communication network according to various aspects of this disclosure.

[0022] Figures 3A-3C Figures 4A-4C, 5A-5C, and 6A-6C are illustrations showing examples of determining cyclic prefix extensions for probe reference signal transmissions in New Radio Unlicensed (NR-U) according to various aspects of this disclosure.

[0023] Figure 7-9 This is a diagram illustrating, for example, an example process performed by a UE according to various aspects of this disclosure. Detailed Implementation

[0024] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or method of practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0025] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in detail below and illustrated in the accompanying drawings by various frames, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such an element is 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 the terms commonly associated with 3G and / or 4G wireless technologies may be used to describe the aspects herein, the aspects of this disclosure can be applied to other generations of communication systems, including NR technologies, such as 5G and later communication systems.

[0027] Figure 1 This is a diagram illustrating a wireless network 100 in which various aspects of the present disclosure may be practiced. Wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. Wireless network 100 may include several BS 110s (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE) and may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, Transmit / Receive Point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to 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 other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with a service subscription. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with a service subscription. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs associated with the femtocell (e.g., UEs in a Closed User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 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 herein.

[0029] In some respects, the cell may not necessarily be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may interconnect with each other and / or interconnect to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, and / or the like of any suitable transport network).

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

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

[0032] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. 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 phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet device, camera, gaming device, netbook, smartbook, ultrabook, medical device or equipment, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), entertainment device (e.g., music or video device, or satellite radio), vehicle component or sensor, smart meter / 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, location tags, etc., capable of communicating with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or from a network (e.g., a wide area network such as the Internet or a cellular network) via wired or wireless communication links. 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 (CPE). UE 120 can be included within a housing that houses the components of UE 120 (e.g., processor components, memory components, etc.).

[0035] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Technology (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 respects, 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 communicating 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, vehicle-to-infrastructure (V2I) protocols, mesh networks, etc.). In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations performed by base station 110 as described elsewhere herein.

[0037] As mentioned above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0038] Figure 2 A block diagram of a design 200 for base station 110 and UE 120 is shown. Base station 110 and UE 120 can be Figure 1 One of the base stations and one of the UEs. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein, typically T≥1 and R≥1.

[0039] 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., code 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., for semi-static resource allocation information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper-layer signaling, etc.), and provide overhead symbols and control symbols. Transmitting processor 220 can also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and can provide T output symbol streams to T modulators (MODs) 232a to 232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t can be transmitted via T antennas 234a to 234t respectively. According to the aspects described in more detail below, position coding can be used to generate synchronization signals to convey additional information.

[0040] 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, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate and decode) these detected symbols, provide the decoded data for UE 120 to data sink 260, and provide the decoded control information and system information to controller / processor 280. The channel processor can determine the Received Reference Signal Power (RSRP), Received Signal Strength Indicator (RSSI), Received Reference Signal Quality (RSRQ), and / or Channel Quality Indicator (CQI), etc. In some respects, one or more components of the UE 120 may be included in the housing.

[0041] 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., reports including RSRP, RSSI, RSRQ, CQI, etc.). 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 by the TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110, where applicable. 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 receiving processor 238 to obtain decoded data and control information transmitted by UE 120. Receiving processor 238 can provide the decoded data to data sink 239 and the 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. Network controller 130 may include communication unit 294, controller / processor 290 and memory 292.

[0042] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2Any other component may perform one or more techniques, as described in more detail elsewhere herein, associated with determining the cyclic prefix extension for probe reference signal (SRS) transmission in New Radio Unlicensed (NR-U). For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can execute or direct, for example Figure 7 Process 700 Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120, one or more instructions may execute or direct, for example... Figure 7 Process 700 Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. Scheduler 246 can schedule the UE for data transmission on the downlink and / or uplink.

[0043] In some aspects, UE 120 may include components for receiving uplink grants that schedule SRS transmissions and Physical Uplink Shared Channel (PUSCH) transmissions and indicate one or more parameters for determining a cyclic prefix extension; components for determining the cyclic prefix extension based at least in part on said one or more parameters; and components for transmitting an SRS transmission with a cyclic prefix extension after performing a Listen-Before-Talk (LBT) procedure, etc. In some aspects, UE 120 may include components for receiving uplink grants that schedule PUSCH transmissions and indicate one or more parameters for determining a first cyclic prefix extension, the first cyclic prefix extension determining a second cyclic prefix extension for an SRS transmission to be transmitted after a timing gap following a PUSCH transmission; and components for transmitting an SRS transmission with a second cyclic prefix extension after transmitting a PUSCH transmission, etc. In some aspects, UE 120 may include components for receiving scheduled SRS transmissions and instructing downlink control information (DCI) communications for determining one or more parameters for cyclic prefix extension, components for determining cyclic prefix extension based at least in part on said one or more parameters, and components for transmitting SRS transmissions with cyclic prefix extension after performing an LBT procedure, etc. In some aspects, such components may include combinations of... Figure 2One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0044] As mentioned above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0045] The BS and UE can communicate in shared spectrum bands or unlicensed bands, such as the LTE Licensed Assisted Access (LAA) band, NR-U band, etc. Shared spectrum bands may include the International Telecommunication Union (ITU) radio spectrum, wireless local area network (WLAN) bands, Institute of Electrical and Electronics Engineers (IEEE) radar bands, and / or other types of bands and / or spectrum on which different types of wireless communications can be performed.

[0046] To coordinate radio resources in a shared spectrum band among multiple wireless communication devices (e.g., UE, BS, and / or other types of devices), each wireless communication device may perform a Level By-Brain (LBT) procedure to determine if the shared spectrum band is idle before transmitting on it. If the wireless communication device determines that the shared spectrum band is idle after a threshold amount of time, it may continue transmitting on the shared spectrum band. Otherwise, if the wireless communication device determines that the shared spectrum band is being used by another wireless communication device, it may wait for a period of time before retrying the LBT procedure.

[0047] When performing a transmission on a shared spectrum band, wireless communication devices can send a cyclic prefix spread before (or together with) the transmission to facilitate alignment of Orthogonal Frequency Division Multiplexing (OFDM) symbols and reduce inter-symbol interference (ISI). After a transmission on the shared spectrum band, if the timing gap between the transmission and subsequent transmissions does not meet a threshold LBT timing gap, the wireless communication device will need to perform another LBT procedure before the subsequent transmission. The threshold LBT timing gap can be configured to reduce the risk of collisions on the shared spectrum band if another wireless communication device determines that the shared spectrum band is idle while performing an LBT procedure during the timing gap between the transmission and subsequent transmissions.

[0048] In some cases, certain wireless networks can support flexible configuration of SRS transmissions on shared spectrum bands. For example, while some wireless networks may restrict the location of SRS transmissions to the last 6 symbols of the time slot in which the associated PUSCH transmission will occur, others may support configuring SRS transmissions to begin at any symbol within the time slot via Extended Radio Resource Control (RRC) configuration parameters, such as the startPosition parameter (which can indicate the start symbol of the SRS transmission). In these cases, the BS may be allowed to configure the startPosition parameter to have a value range of 0-13.

[0049] While advancements in SRS transmission configuration within wireless networks have provided greater flexibility in scheduling SRS transmissions within shared spectrum bands, the ability to alter the start symbol of an SRS transmission introduces gaps between SRS transmissions and associated PUSCH transmissions. This, in turn, increases the number of LBT procedures the UE may need to perform to send both SRS and PUSCH transmissions. Furthermore, while the UE may be able to determine the cyclic prefix extension for PUSCH transmissions, it may not be able to determine the cyclic prefix extension for SRS transmissions.

[0050] The aspects described herein provide techniques and apparatus for determining the cyclic prefix extension for probe reference signal transmissions in NR-U and / or another shared spectrum band. In some aspects, the BS (e.g., BS 110) may indicate one or more parameters for determining the cyclic prefix extension in an uplink grant that schedules SRS transmissions and associated PUSCH transmissions. The UE (e.g., UE 120) may receive the uplink grant, may determine the cyclic prefix extension based at least in part on these one or more parameters, and may transmit an SRS transmission or a PUSCH transmission with the cyclic prefix extension. If a timing gap occurs between an SRS transmission and a PUSCH transmission, the UE can determine another cyclic prefix extension for the latter transmission, such that no further LBT procedure is required between the SRS and PUSCH transmissions. In this way, the UE can determine the cyclic prefix extension for SRS transmissions in a shared spectrum band, and can determine the cyclic prefix between SRS and PUSCH transmissions to reduce the number of LBT procedures to be performed by the UE, etc. Thus, performing fewer LBT procedures reduces the consumption of processing and memory resources by the UE performing the LBT procedures.

[0051] Figures 3A-3C This is a diagram illustrating one or more examples 300 of determining a cyclic prefix spread for probe reference signal transmission in an NR-U according to various aspects of this disclosure. Figures 3A-3C As shown, Example 300 includes BS 110 (e.g., the one mentioned above in conjunction with...). Figure 1 And / or 2 shown and described BS 110) with UE 120 (e.g., in combination above) Figure 1 Communication between BS110 and UE120 (shown and described in Figure 2). BS110 and UE120 may be included in a wireless network (such as wireless network 100). BS110 and UE120 may communicate on a radio access link, which may include an uplink and a downlink. In some aspects, BS110 and UE120 communicate via a shared radio spectrum band (such as the NR-U band or another type of shared radio spectrum band where BS110, UE120, and other wireless communication devices perform an LBT process before transmitting on the shared radio spectrum band).

[0052] like Figure 3A As shown by reference numeral 302 in the accompanying drawing, BS 110 can send uplink grants to UE 120. Uplink grants can schedule PUSCH transmissions and associated SRS transmissions for UE 120. For example, uplink grants can identify time-domain resources (e.g., one or more time slots, one or more symbols, etc.) and / or frequency-domain resources (e.g., one or more resource blocks, one or more resource elements, one or more subcarriers, one or more component carriers, etc.) in which PUSCH transmissions and SRS transmissions are performed. In some aspects, uplink grants are included in DCI and / or Physical Downlink Control Channel (PDCCH) communications.

[0053] like Figure 3A As further illustrated, uplink granting can schedule SRS and PUSCH transports as back-to-back transports. In this case, PUSCH and SRS transports will be executed within adjacent time-domain resources or groups or sets of adjacent time-domain resources. Although Figure 3A The example shows that the SRS transmission is scheduled to be sent before the PUSCH transmission, but example 300 may include the PUSCH transmission being scheduled to be sent before the SRS transmission.

[0054] like Figure 3B As shown by reference numeral 304 in the accompanying drawings, UE 120 can receive uplink grants and can determine the cyclic prefix extension for transmissions used for SRS and PUSCH transmissions. Specifically, UE 120 can determine the duration of the cyclic prefix extension to be sent along with the transmission scheduled to be executed first (e.g., an SRS transmission or a PUSCH transmission). Figure 3B In the example shown, UE 120 determines the duration of the cyclic prefix extension to be sent along with the SRS transmission.

[0055] UE 120 can determine the cyclic prefix extension (e.g., the duration of the cyclic prefix extension) based at least in part on one or more parameters indicated in the uplink grant received from BS 110 for determining the cyclic prefix extension. The one or more parameters can be indicated by a bit field comprising one or more bits (e.g., b1b2). The values ​​indicated by the bit field can be indexed into a table, database, specification, standard, or another type of data structure. An example table is shown in Table 1 below. Other tables can be configured.

[0056] b0b1 LBT type CP extension 0 Cat-2 16μs C2* symbol length – 16μs-TA 1 Cat-2 25μs C3* symbol length – 25μs-TA 2 Cat-2 25μs C1* symbol length – 25μs 3 Cat-4 0

[0057] Table 1

[0058] As shown in Table 1, each possible value of the bit field (or a subset thereof) can be indexed into a row (or column) of the table. One or more parameters may include the LBT type and information for determining the Cyclic Prefix Extension (CP extension). The LBT type parameter indicates the type of LBT procedure that the UE 120 will perform before transmitting SRS and PUSCH transmissions. Examples of LBT types include Category 1 (Cat-1) LBT (no LBT procedure performed), Category 2 (Cat-2) LBT (LBT procedure performed for a specific duration), Category 3 (Cat-3) LBT (LBT procedure performed for a randomly selected duration within a fixed contention window size), and Category 4 (Cat-4) LBT (LBT procedure performed for a randomly selected duration within a variable contention window size). For bit field values ​​configured with the Cat-2 LBT procedure type, the table may also indicate a threshold LBT timing gap between transmissions (e.g., 16 μs, 25 μs, etc.), beyond which the UE 120 will perform another LBT procedure. Therefore, if the timing gap between uplink transmissions of UE 120 exceeds the threshold timing gap, UE 120 will perform the LBT procedure before each uplink transmission.

[0059] Information used to determine the cyclic prefix spread can include equations for determining the duration of the cyclic prefix spread, such as one or another of the example equations shown in Table 1 above. As shown in Table 1, the equations for determining the cyclic prefix spread can include various parameters such as C1, C2, C3, the symbol length of the radio access link on which BS 110 and UE 120 communicate, the threshold LBT timing interval, the timing advance (TA) of UE 120, etc. C1 can be a variable value determined at least in part based on the subcarrier spacing (SCS) of the radio access link on which BS 110 and UE 120 communicate. As an example, C1 can be 1 for a 15 kHz SCS and a 30 kHz SCS, and 2 for a 60 kHz SCS, etc. C2 and C3 can be variable values ​​configured by BS 110 via RRC signaling.

[0060] like Figure 3C As shown by reference numeral 306 in the accompanying drawings, UE 120 can transmit an SRS transmission with a defined cyclic prefix extension after performing an LBT procedure. For example, UE 120 can transmit an SRS transmission in the time-domain resources and / or frequency-domain resources indicated in the uplink grant. Furthermore, UE 120 can transmit the cyclic prefix extension before transmitting the SRS transmission and after performing the LBT procedure. UE 120 can perform the type of LBT procedure indicated by the bit field in the uplink grant. UE 120 can transmit a PUSCH transmission in adjacent time-domain resources indicated in the uplink grant after transmitting the SRS transmission.

[0061] As mentioned above, Figures 3A-3C This is provided as one or more examples. Other examples may differ from those provided. Figures 3A-3C The example described.

[0062] Figures 4A-4C This is a diagram illustrating one or more examples 400 of determining a cyclic prefix spread for probe reference signal transmission in an NR-U according to various aspects of this disclosure. Figures 4A-4C As shown, Example 400 includes BS 110 (e.g., the one mentioned above in conjunction with...). Figure 1 And / or 2 shown and described BS 110) with UE 120 (e.g., in combination above) Figure 1Communication between BS 110 and UE 120 (shown and described in Figure 2). BS 110 and UE 120 may be included in a wireless network (such as wireless network 100). BS 110 and UE 120 may communicate on a radio access link, which may include an uplink and a downlink. In some aspects, BS 110 and UE 120 communicate via a shared radio spectrum band (such as the NR-U band or another type of shared radio spectrum band where BS 110, UE 120, and other wireless communication devices perform an LBT process before transmitting on the shared radio spectrum band).

[0063] like Figure 4A As shown by reference numeral 402 in the accompanying drawing, BS 110 can send an uplink grant to UE 120. The uplink grant can schedule PUSCH transmissions and associated SRS transmissions for UE 120. For example, the uplink grant can identify time-domain and / or frequency-domain resources in which PUSCH transmissions and SRS transmissions are performed. In some aspects, the uplink grant is included in DCI and / or PDCCH communications.

[0064] like Figure 4A As further illustrated, uplink granting can schedule SRS and PUSCH transmissions when there are time gaps between transmissions. In this case, PUSCH and SRS transmissions will be executed in time-domain resources or groups or sets of time-domain resources separated by one or more time slots, one or more symbols, or portions of one or more symbols.

[0065] like Figure 4B As shown by reference numeral 404 in the accompanying drawings, UE 120 can receive uplink grants and can determine a first cyclic prefix extension (CP extension 1) for transmission with SRS transmissions and a second cyclic prefix extension (CP extension 2) for transmission with PUSCH transmissions. Specifically, UE 120 can determine the duration of the first cyclic prefix extension and the duration of the second cyclic prefix extension. UE 120 can determine the first cyclic prefix extension (e.g., the duration of the first cyclic prefix extension) based at least in part on one or more parameters indicated in the uplink grant received from BS 110 for determining the cyclic prefix extension. The one or more parameters can be indicated by a bit field including one or more bits (e.g., b1b2). The values ​​indicated by the bit fields can be indexed into tables, databases, specifications, standards, or other types of data structures, such as the example table shown in Table 1 above.

[0066] UE 120 can determine the duration of the second cyclic prefix extension such that the timing gap between the SRS transmission and the start of the second cyclic prefix extension satisfies the threshold LBT timing gap. In this way, UE 120 determines the duration of the second cyclic prefix extension so that no further LBT procedure is required between the SRS transmission and the PUSCH transmission. In some aspects, BS 110 sends an indication of the threshold LBT timing gap (e.g., in uplink granting or in RRC signaling). In some aspects, UE 120 is configured or programmed with information identifying the threshold LBT timing gap.

[0067] As in Figure 4C As shown by reference numeral 406 in the accompanying drawings, UE 120 may transmit an SRS transmission with a first cyclic prefix extension after performing an LBT procedure. For example, UE 120 may transmit an SRS transmission in the time-domain resources and / or frequency-domain resources indicated in the uplink grant. Furthermore, UE 120 may transmit the first cyclic prefix extension before transmitting the SRS transmission and after performing the LBT procedure. UE 120 may perform the type of LBT procedure indicated by the bit field in the uplink grant. UE 120 may transmit a PUSCH transmission in the time-domain resources indicated in the uplink grant after performing the SRS transmission. UE 120 may transmit a PUSCH transmission with a second cyclic prefix extension.

[0068] As mentioned above, Figures 4A-4C This is provided as one or more examples. Other examples may differ from those provided. Figures 4A-4C The example described.

[0069] Figures 5A-5C This is a diagram illustrating one or more examples 500 of determining a cyclic prefix extension for probe reference signal transmission in an NR-U according to various aspects of this disclosure. Figures 5A-5C As shown, Example 500 includes BS 110 (e.g., the one mentioned above in conjunction with...). Figure 1 And / or 2 shown and described BS 110) with UE 120 (e.g., in combination above) Figure 1 Communication between BS 110 and UE 120 (shown and described in Figure 2). BS 110 and UE 120 may be included in a wireless network (such as wireless network 100). BS 110 and UE 120 may communicate on a radio access link, which may include an uplink and a downlink. In some aspects, BS 110 and UE 120 communicate via a shared radio spectrum band (such as the NR-U band or another type of shared radio spectrum band where BS 110, UE 120, and other wireless communication devices perform an LBT process before transmitting on the shared radio spectrum band).

[0070] like Figure 5A As shown by reference numeral 502 in the accompanying drawing, BS 110 can send an uplink grant to UE 120. The uplink grant can schedule PUSCH transmissions for UE 120. For example, the uplink grant can identify time-domain and / or frequency-domain resources in which PUSCH transmissions are to be performed. In some aspects, the uplink grant is included in DCI and / or PDCCH communications.

[0071] like Figure 5B As shown, BS 110 can also schedule SRS transmissions for UE 120. In some aspects, SRS transmissions are scheduled by uplink grants that schedule PUSCH transmissions. In some aspects, and as... Figure 5B As shown in the example, the BS 110 can schedule SRS transmissions as periodic or semi-persistent via RRC signaling. In this case, the RRC signaling can indicate the cyclic time-domain resources and / or frequency-domain resources used for SRS transmissions. Figure 5B As shown, SRS transmissions can be scheduled to occur after PUSCH transmissions. Furthermore, as... Figure 5B As shown, SRS transmissions can be scheduled to occur after a time gap following the completion of a PUSCH transmission.

[0072] As in Figure 5B As further illustrated by reference numeral 504, UE 120 can receive uplink grants and can determine a first cyclic prefix extension (CP extension 1) for transmission with PUSCH transmissions and a second cyclic prefix extension (CP extension 2) for transmission with SRS transmissions. Specifically, UE 120 can determine the duration of the first cyclic prefix extension and the duration of the second cyclic prefix extension. UE 120 can determine the first cyclic prefix extension (e.g., the duration of the first cyclic prefix extension) based at least in part on one or more parameters indicated in the uplink grant received from BS 110 for determining the cyclic prefix extension. The one or more parameters can be indicated by a bit field comprising one or more bits (e.g., b1b2). The values ​​indicated by the bit field can be indexed into tables, databases, specifications, standards, or other types of data structures, such as the example table shown in Table 1 above.

[0073] UE 120 can determine the duration of the second cyclic prefix extension such that the timing gap between the PUSCH transmission and the start of the second cyclic prefix extension satisfies the threshold LBT timing gap. In this way, UE 120 determines the duration of the second cyclic prefix extension so that no further LBT procedure is required between the PUSCH transmission and the SRS transmission. In some aspects, BS 110 sends an indication of the threshold LBT timing gap (e.g., in uplink granting or in RRC signaling). In some aspects, UE 120 is configured or programmed with information identifying the threshold LBT timing gap.

[0074] like Figure 5C As shown by reference numeral 506 in the accompanying drawing, UE 120 may transmit a PUSCH transmission with a first cyclic prefix extension after performing an LBT procedure. For example, UE 120 may transmit a PUSCH transmission in the time-domain resources and / or frequency-domain resources indicated in the uplink grant. Furthermore, UE 120 may transmit the first cyclic prefix extension before transmitting the PUSCH transmission and after performing the LBT procedure. UE 120 may perform the type of LBT procedure indicated by the bit field in the uplink grant. UE 120 may transmit an SRS transmission in the time-domain resources indicated in the uplink grant after performing a PUSCH transmission. UE 120 may transmit an SRS transmission with a second cyclic prefix extension.

[0075] As mentioned above, Figures 5A-5C This is provided as one or more examples. Other examples may differ from those provided. Figures 5A-5C The example described.

[0076] Figures 6A-6C This is a diagram illustrating one or more examples 600 of determining a cyclic prefix spread for probe reference signal transmission in an NR-U according to various aspects of this disclosure. Figures 6A-6C As shown, Example 600 includes BS 110 (e.g., the one mentioned above in conjunction with...). Figure 1 And / or 2 shown and described BS 110) with UE 120 (e.g., in combination above) Figure 1 Communication between BS 110 and UE 120 (shown and described in Figure 2). BS 110 and UE 120 may be included in a wireless network (such as wireless network 100). BS 110 and UE 120 may communicate on a radio access link, which may include an uplink and a downlink. In some aspects, BS 110 and UE 120 communicate via a shared radio spectrum band (such as the NR-U band or another type of shared radio spectrum band where BS 110, UE 120, and other wireless communication devices perform an LBT process before transmitting on the shared radio spectrum band).

[0077] like Figure 6A As shown by reference numeral 602 in the accompanying drawings, BS 110 can send DCI communication to UE 120. In some aspects, the DCI communication can trigger UE 120 to perform SRS transmissions for UE 120. In these cases, the DCI communication may include downlink granting on the PDCCH. In some aspects, the DCI communication may be a DCI format (e.g., DCI format 2_3) indicating transmit power control (TPC) commands and SRS resource indicators for UE 120. In these cases, the DCI communication can identify the time-domain resources and / or frequency-domain resources in which the SRS transmission is performed. Furthermore, the TPC command may indicate or can be used to determine the transmit power at which UE 120 will transmit the SRS transmission.

[0078] like Figure 6B As shown by reference numeral 604 in the accompanying figure, UE 120 can receive uplink grants and can determine the cyclic prefix extension (CP extension) used for transmission along with SRS transmissions. Specifically, UE 120 can determine the duration of the cyclic prefix extension. UE 120 can determine the cyclic prefix extension (e.g., the duration of the cyclic prefix extension) based at least in part on one or more parameters indicated in DCI communications or in RRC signaling received from BS 110 for determining the cyclic prefix extension. One or more parameters can be indicated by a bit field comprising one or more bits (e.g., b1b2). The values ​​indicated by the bit field can be indexed into tables, databases, specifications, standards, or other types of data structures, such as the example tables shown in Table 1 above.

[0079] As in Figure 6C As shown by reference numeral 606 in the accompanying drawings, UE 120 may transmit SRS transmissions with cyclic prefix extension after performing the LBT procedure. For example, UE 120 may transmit SRS transmissions in time-domain and / or frequency-domain resources indicated in DCI communications. Furthermore, UE 120 may transmit cyclic prefix extensions before transmitting SRS transmissions and after performing the LBT procedure.

[0080] As mentioned above, Figures 6A-6C This is provided as one or more examples. Other examples may differ from those provided. Figures 6A-6C The example described.

[0081] Figure 7 This is a diagram illustrating, for example, an example process 700 performed by a UE according to various aspects of this disclosure. Example process 700 is a UE (e.g., as described above in conjunction with...). Figure 1 , 2Examples of UE 120 shown and described in one or more of the following: 3A-3C, 4A-4C, 5A-5C and / or 6A-6C, performing operations associated with determining the cyclic prefix extension of the probe reference signal transmission in the NR-U.

[0082] like Figure 7 As shown, in some aspects, process 700 may include receiving an uplink grant that schedules SRS and PUSCH transmissions and indicates one or more parameters for determining cyclic prefix extension (block 710). For example, a UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive an uplink grant that schedules SRS and PUSCH transmissions and indicates one or more parameters for determining cyclic prefix extension as described above.

[0083] like Figure 7 As further shown, in some aspects, process 700 may include determining the cyclic prefix extension based at least in part on one or more parameters (block 720). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may determine the cyclic prefix extension based at least in part on one or more parameters as described above.

[0084] like Figure 7 As further shown, in some aspects, process 700 may include: after performing the LBT process, transmitting an SRS transmission with cyclic prefix extension (block 730). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may transmit an SRS transmission with cyclic prefix extension after performing the LBT process as described above.

[0085] Process 700 may include additional aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or in conjunction with one or more other processes described elsewhere herein.

[0086] In a first aspect, uplink granting includes one or more bits indicating one or more parameters for determining the cyclic prefix extension, and the one or more parameters include LBT type and information for determining the cyclic prefix extension. In a second aspect, alone or in combination with the first aspect, uplink granting schedules SRS transmissions to occur before PUSCH transmissions; uplink granting schedules SRS and PUSCH transmissions without a timing gap between SRS and PUSCH transmissions, and process 700 includes sending a PUSCH transmission after sending an SRS transmission.

[0087] In a third aspect, either alone or in combination with one or more of the first and second aspects, uplink granting schedules the SRS transmission to occur before the PUSCH transmission; uplink granting schedules the SRS transmission and PUSCH transmission in the presence of a timing gap between the SRS transmission and the PUSCH transmission, and process 700 includes: determining an additional cyclic prefix extension based at least in part on the duration of the timing gap; and transmitting the PUSCH transmission with the additional cyclic prefix extension after transmitting the SRS transmission. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, determining the additional cyclic prefix extension includes: determining the duration of the additional cyclic prefix extension to reduce the duration of the timing gap between the SRS transmission and the PUSCH transmission, such that the PUSCH transmission does not require another LBT process.

[0088] although Figure 7 An example box of process 700 is shown, but in some respects, process 700 may include... Figure 7 The boxes depicted in the text are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Alternatively, two or more boxes in the process 700 can be executed in parallel.

[0089] Figure 8 This is a diagram illustrating, for example, an example process 800 performed by a UE according to various aspects of this disclosure. Example process 800 is a UE (e.g., as described above in conjunction with...) Figure 1 , 2 Examples of UE 120 shown and described in one or more of the following: 3A-3C, 4A-4C, 5A-5C and / or 6A-6C, performing operations associated with determining the cyclic prefix extension of the probe reference signal transmission in the NR-U.

[0090] like Figure 8 As shown, in some aspects, process 800 may include receiving a scheduled PUSCH transmission and indicating an uplink grant for determining one or more parameters of the first cyclic prefix extension (block 810). For example, a UE (e.g., using a receive processor 258, a transmit processor 264, a controller / processor 280, a memory 282, etc.) may receive a scheduled PUSCH transmission and indicate an uplink grant for determining one or more parameters of the first cyclic prefix extension as described above.

[0091] like Figure 8As further shown, in some aspects, process 800 may include determining a second cyclic prefix extension (block 820) for the SRS transmission to be sent after a timing gap following the PUSCH transmission. For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may determine the second cyclic prefix extension for the SRS transmission to be sent after a timing gap following the PUSCH transmission as described above.

[0092] like Figure 8 As further shown, in some aspects, process 800 may include transmitting an SRS transmission with a second cyclic prefix extension after transmitting a PUSCH transmission (block 830). For example, a UE (e.g., using a receive processor 258, a transmit processor 264, a controller / processor 280, a memory 282, etc.) may transmit an SRS transmission with a second cyclic prefix extension after transmitting a PUSCH transmission as described above.

[0093] Process 800 may include additional aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or in conjunction with those described elsewhere in this document.

[0094] In the first aspect, the uplink grant includes one or more bits indicating one or more parameters for determining the cyclic prefix extension, and the one or more parameters include an LBT type and information for determining the first cyclic prefix extension. In the second aspect, alone or in combination with the first aspect, process 800 includes: determining the first cyclic prefix extension for PUSCH transmission; performing an LBT procedure; and transmitting a PUSCH transmission with the first cyclic prefix extension after performing the LBT procedure.

[0095] In a third aspect, either alone or in combination with one or more of the first and second aspects, determining the second cyclic prefix extension includes: determining the duration of the second cyclic prefix extension to reduce the duration of the timing gap between SRS transmissions and PUSCH transmissions, such that the SRS transmission does not require another LBT process. In a fourth aspect, either alone or in combination with one or more of the first to third aspects, the SRS transmission is a periodic or semi-persistent SRS transmission. In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the SRS transmission is an aperiodic SRS transmission scheduled by uplink grant.

[0096] although Figure 8 An example box of process 800 is shown, but in some respects, process 800 may include... Figure 8 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Alternatively, two or more boxes in the process 800 may be executed in parallel.

[0097] Figure 9 This is a diagram illustrating, for example, an example process 900 performed by a UE according to various aspects of this disclosure. Example process 900 is where the UE (e.g., as described above) is... Figure 1 , 2 Examples of UE 120 shown and described in one or more of the following: 3A-3C, 4A-4C, 5A-5C and / or 6A-6C, performing operations associated with determining the cyclic prefix extension of the probe reference signal transmission in the NR-U.

[0098] like Figure 9 As shown, in some aspects, process 900 may include receiving DCI communication that schedules SRS transmissions and indicates one or more parameters for determining cyclic prefix extension (block 910). For example, a UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may receive DCI communication that schedules SRS transmissions and indicates one or more parameters for determining cyclic prefix extension as described above.

[0099] like Figure 9 As further shown, in some aspects, process 900 may include determining the cyclic prefix extension based at least in part on one or more parameters (block 920). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may determine the cyclic prefix extension based at least in part on one or more parameters as described above.

[0100] like Figure 9 As further shown, in some aspects, process 900 may include transmitting an SRS transmission with cyclic prefix extension after performing the LBT process (block 930). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may transmit an SRS transmission with said cyclic prefix extension after performing the LBT process as described above.

[0101] Process 900 may include additional aspects, such as any single aspect or any combination of aspects of one or more other processes described below and / or in conjunction with those described elsewhere in this document.

[0102] In a first aspect, DCI communication includes one or more bits indicating one or more parameters for determining the cyclic prefix extension, and the one or more parameters include LBT type and information for determining the cyclic prefix extension. In a second aspect, alone or in combination with the first aspect, DCI communication indicates a TPC command for SRS transmission. In a third aspect, alone or in combination with one or more of the first and second aspects, DCI communication includes a PDCCH downlink grant that triggers SRS transmission.

[0103] although Figure 9 An example box of process 900 is shown, but in some respects, process 900 may include... Figure 9 The boxes depicted in the text are compared to additional boxes, fewer boxes, different boxes, or boxes arranged differently. Alternatively, two or more boxes in the process 900 can be executed in parallel.

[0104] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the parties to the precise forms disclosed. Modifications and variations can be made based on the foregoing disclosure, or from the practices of the parties involved.

[0105] As used herein, the term "component" is intended to be interpreted broadly as hardware, firmware, and / or a combination of hardware and software. As used herein, a processor is implemented as a combination of hardware, firmware, and / or hardware and software.

[0106] As used in this article, depending on the context, a threshold can refer to a value that is greater than, greater than or equal to, less than, less than or equal to, equal to, or not equal to the threshold.

[0107] It should be clear that the systems and / or methods described herein can be implemented in various forms of hardware, firmware, and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to any specific software code—it should be understood that software and hardware can be designed to implement the systems and / or methods, at least in part, based on the description herein.

[0108] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways not specifically recited in the claims and / or disclosed in the specification. Although each listed dependent claim may be directly subordinated to only one claim, the disclosure of the aspects includes combinations of each dependent claim with every other claim in the claim set. The phrase “at least one” in the list of items refers to any combination of these items, including single members. As an 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 having multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other order of a, b, and c).

[0109] Unless explicitly stated otherwise, the elements, actions, or instructions used herein should not be construed as critical or necessary. Furthermore, as used herein, the articles “a” and “one” are intended to include one or more items and are interchangeable with “one or more.” Additionally, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, etc.) and are interchangeable 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 “have,” “possess,” “is having,” etc., are intended to be open-ended terms. Moreover, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.”

Claims

1. A method for wireless communication performed by a user equipment (UE), comprising: Receive uplink authorization, wherein the uplink authorization is: Schedule the transmission of the Sound Reference Signal (SRS) and the Physical Uplink Shared Channel (PUSCH), and Indicates one or more parameters used to determine the cyclic prefix extension for the SRS transmission; The cyclic prefix extension is determined at least in part based on one or more of the parameters; After performing the Listen-Before-Speak (LBT) procedure, an SRS transmission with the aforementioned cyclic prefix extension is sent; Another cyclic prefix extension is determined at least in part based on the duration of the timing gap between the SRS transmission and the PUSCH transmission; and After sending the SRS transmission, send a PUSCH transmission with the other cyclic prefix extension. The duration of the other cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another LBT process for the PUSCH transmission.

2. The method according to claim 1, wherein, The uplink grant includes one or more bits indicating one or more parameters for determining the cyclic prefix extension; as well as Wherein, the one or more parameters include: LBT type, and Information used to determine the cyclic prefix extension.

3. The method according to claim 1, wherein, The uplink grant schedules the SRS transmission to occur before the PUSCH transmission; Wherein, the uplink authorization schedules the SRS transmission and the PUSCH transmission when there is no time gap between the SRS transmission and the PUSCH transmission; and The method further includes: The PUSCH transmission is sent after the SRS transmission is sent.

4. A method for wireless communication performed by a user equipment (UE), comprising: Receive uplink authorization, wherein the uplink authorization is: Schedule physical uplink shared channel (PUSCH) transmission, and Indicates one or more parameters used to determine the first cyclic prefix extension for the PUSCH transmission; Determine the second cyclic prefix extension of the probe reference signal SRS transmission to be sent after the timing gap following the PUSCH transmission; as well as After sending the PUSCH transmission, an SRS transmission with the second cyclic prefix extension is sent. The duration of the second cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another listen-before-speak LBT process for the SRS transmission.

5. The method according to claim 4, wherein, The uplink grant includes one or more bits indicating one or more parameters for determining the cyclic prefix extension; as well as Wherein, the one or more parameters include: LBT type, and Information used to determine the first cyclic prefix extension.

6. The method according to claim 4, further comprising: Determine the first cyclic prefix extension for the PUSCH transmission; Perform the Listen-Before-Speak (LBT) process; as well as After the LBT process is executed, a PUSCH transmission with the first cyclic prefix extension is sent.

7. The method according to claim 4, wherein, The SRS transmission is a periodic or semi-persistent SRS transmission.

8. The method according to claim 4, wherein, The SRS transmission is an aperiodic SRS transmission scheduled by the uplink grant.

9. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors are operatively coupled to the memory, and the memory and the one or more processors are configured to: Receive uplink authorization, wherein the uplink authorization is: Schedule the transmission of the Sound Reference Signal (SRS) and the Physical Uplink Shared Channel (PUSCH), and Indicates one or more parameters used to determine the cyclic prefix extension for the SRS transmission; The cyclic prefix extension is determined at least in part based on one or more of the parameters; After performing the Listen-Before-Speak (LBT) procedure, an SRS transmission with the aforementioned cyclic prefix extension is sent; Another cyclic prefix extension is determined at least in part based on the duration of the timing gap between the SRS transmission and the PUSCH transmission; and After sending the SRS transmission, send a PUSCH transmission with the other cyclic prefix extension. The duration of the other cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another LBT process for the PUSCH transmission.

10. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, operatively coupled to a memory, wherein the memory and the one or more processors are configured to: Receive uplink authorization, wherein the uplink authorization is: Schedule physical uplink shared channel (PUSCH) transmission, and Indicates one or more parameters used to determine the first cyclic prefix extension for the PUSCH transmission; Determine the second cyclic prefix extension of the probe reference signal SRS transmission to be sent after the timing gap following the PUSCH transmission; as well as After sending the PUSCH transmission, an SRS transmission with the second cyclic prefix extension is sent. The duration of the second cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another listen-before-speak LBT process for the SRS transmission.

11. A non-transitory computer-readable medium storing one or more instructions for wireless communication, said one or more instructions comprising: One or more instructions, when executed by one or more processors of the user equipment (UE), cause the one or more processors to: Receive uplink authorization, wherein the uplink authorization is: Schedule the transmission of the Sound Reference Signal (SRS) and the Physical Uplink Shared Channel (PUSCH), and Indicates one or more parameters used to determine the cyclic prefix extension for the SRS transmission; The cyclic prefix extension is determined at least in part based on one or more of the parameters; After performing the Listen-Before-Speak (LBT) procedure, an SRS transmission with the aforementioned cyclic prefix extension is sent; Another cyclic prefix extension is determined at least in part based on the duration of the timing gap between the SRS transmission and the PUSCH transmission; and After sending the SRS transmission, send a PUSCH transmission with the other cyclic prefix extension. The duration of the other cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another LBT process for the PUSCH transmission.

12. A non-transitory computer-readable medium storing one or more instructions for wireless communication, said one or more instructions comprising: One or more instructions, when executed by one or more processors of the user equipment (UE), cause the one or more processors to: Receive uplink authorization, wherein the uplink authorization is: Schedule physical uplink shared channel (PUSCH) transmission, and Indicates one or more parameters used to determine the first cyclic prefix extension for the PUSCH transmission; Determine the second cyclic prefix extension of the probe reference signal SRS transmission to be sent after the timing gap following the PUSCH transmission; as well as After sending the PUSCH transmission, an SRS transmission with the second cyclic prefix extension is sent. The duration of the second cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another listen-before-speak LBT process for the SRS transmission.

13. An apparatus for wireless communication, comprising: A component for receiving uplink grants, wherein the uplink grants are: Schedule the transmission of the Sound Reference Signal (SRS) and the Physical Uplink Shared Channel (PUSCH), and Indicates one or more parameters used to determine the cyclic prefix extension for the SRS transmission; A component for determining the cyclic prefix extension based at least in part on one or more of the parameters; Components for transmitting SRS transmissions with the cyclic prefix extension after performing the Listen-Before-Speak (LBT) process; A component for determining another cyclic prefix extension based at least in part on the duration of the timing gap between the SRS transmission and the PUSCH transmission; as well as A component for transmitting a PUSCH transmission with the other cyclic prefix extension after transmitting the SRS transmission. The duration of the other cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another LBT process for the PUSCH transmission.

14. An apparatus for wireless communication, comprising: A component for receiving uplink grants, wherein the uplink grants are: Schedule physical uplink shared channel (PUSCH) transmission, and Indicates one or more parameters used to determine the first cyclic prefix extension for the PUSCH transmission; A component for determining the second cyclic prefix extension of the probe reference signal SRS transmission to be sent after a timing gap following the PUSCH transmission; as well as A component for transmitting an SRS transmission with the second cyclic prefix extension after transmitting the PUSCH transmission. The duration of the second cyclic prefix extension is determined such that the timing gap between the SRS transmission and the PUSCH transmission is reduced to no more than a threshold LBT timing gap, so as to avoid another listen-before-speak LBT process for the SRS transmission.

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