WO2022056813A1

WO2022056813A1 - Techniques for user equipment initiated channel occupancy time with transmission of sounding reference signal

Info

Publication number: WO2022056813A1
Application number: PCT/CN2020/116130
Authority: WO
Inventors: Shaozhen GUO; Jing Sun; Changlong Xu; Xiaoxia Zhang; Rajat Prakash; Hao Xu
Original assignee: Qualcomm Incorporated
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-24

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine a channel occupancy time (COT) associated with a fixed frame period (FFP). The UE may transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP. Numerous other aspects are provided.

Description

TECHNIQUES FOR USER EQUIPMENT INITIATED CHANNEL OCCUPANCY TIME WITH TRANSMISSION OF SOUNDING REFERENCE SIGNAL

FIELD OF THE DISCLOSURE

Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for user equipment initiated channel occupancy time (COT) with transmission of a sounding reference signal (SRS) .

DESCRIPTION OF RELATED ART

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. 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, and/or the like) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .

A wireless network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) . A user equipment (UE) may communicate with a base station (BS) via the downlink and uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the 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, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.

The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, and even global level. New Radio (NR) , which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) . NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.

SUMMARY

In some aspects, a method of wireless communication performed by a user equipment (UE) includes determining a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and transmitting a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.

In some aspects, the signal comprises one or more sounding reference signals (SRSs) .

In some aspects, the UE is configured with one or more SRS resources at the start of the FFP.

In some aspects, the one or more SRSs indicate information regarding sharing of the COT.

In some aspects, the one or more SRSs are configured with a comb value of 2 or 4.

In some aspects, the one or more SRSs are configured with a comb value greater than 4.

In some aspects, the signal includes configured grant uplink control information (CG-UCI) .

In some aspects, the CG-UCI is transmitted in a physical uplink control channel resource.

In some aspects, the CG-UCI is transmitted in a CG physical uplink shared channel resource.

In some aspects, the signal indicates COT sharing information associated with the COT.

In some aspects, the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.

In some aspects, an energy detection threshold associated with COT resource sharing is configured, and the COT sharing information includes information indicating at least one of: a number of slots where a downlink transmission can be assumed within the COT, an offset associated with the number of slots, or that COT resource sharing is not available.

In some aspects, the method includes receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.

In some aspects, an energy detection threshold associated with COT resource sharing is not configured, and the COT sharing information includes information indicating whether COT resource sharing is available.

In some aspects, the method includes receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.

In some aspects, the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.

In some aspects, the downlink transmission is associated with a maximum duration or a transmission type limitation.

In some aspects, the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.

In some aspects, the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.

In some aspects, the signal includes a set of SRSs, and the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In some aspects, the method includes performing the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, the signal includes a set of SRSs, and the set of SRSs indicate a modulation and coding scheme associated with the data transmission.

In some aspects, a method of wireless communication performed by a UE includes performing channel acquisition to acquire a COT; and transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In some aspects, a method of wireless communication performed by a UE includes performing channel acquisition to acquire a COT; and transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and performing the data transmission in the COT based at least in part on the modulation and coding scheme.

In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: determine a COT associated with a FFP; and transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.

In some aspects, the signal comprises one or more SRSs.

In some aspects, the signal includes CG-UCI.

In some aspects, the one or more processors are further configured to: receive, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.

In some aspects, the one or more processors are further configured to: receive, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.

In some aspects, the one or more processors are further configured to: perform the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: perform channel acquisition to acquire a COT; and transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In some aspects, a UE for wireless communication includes a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: perform channel acquisition to acquire a COT; and transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and perform the data transmission in the COT based at least in part on the modulation and coding scheme.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: determine a COT associated with a FFP; and transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.

In some aspects, the signal comprises one or more SRSs.

In some aspects, the signal includes CG-UCI.

In some aspects, the one or more instructions further cause the UE to: receive, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.

In some aspects, the one or more instructions further cause the UE to: receive, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.

In some aspects, the one or more instructions further cause the UE to: perform the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of an UE, cause the UE to: perform channel acquisition to acquire a COT; and transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of an UE, cause the UE to: perform channel acquisition to acquire a COT; and transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and perform the data transmission in the COT based at least in part on the modulation and coding scheme.

In some aspects, an apparatus for wireless communication includes means for determining a COT associated with a FFP; and means for transmitting a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.

In some aspects, the signal comprises one or more SRSs.

In some aspects, the signal includes CG-UCI.

In some aspects, the apparatus includes means for receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.

In some aspects, the apparatus includes means for receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.

In some aspects, the apparatus includes means for performing the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, an apparatus for wireless communication includes means for performing channel acquisition to acquire a COT; and means for transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In some aspects, an apparatus for wireless communication includes means for performing channel acquisition to acquire a COT; and means for transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and means for performing the data transmission in the COT based at least in part on the modulation and coding scheme.

Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with various aspects of the present disclosure.

Fig. 2 is a diagram illustrating an example of a base station in communication with a UE in a wireless network, in accordance with various aspects of the present disclosure.

Fig. 3 is a diagram illustrating an example of channel access in unlicensed spectrum, in accordance with various aspects of the present disclosure.

Fig. 4 is a diagram illustrating an example of transmission of a signal to secure a channel occupancy time (COT) , in accordance with various aspects of the present disclosure.

Fig. 5 is a diagram illustrating an example of transmission of one or more sounding reference signals (SRSs) at a start of a fixed frame period (FFP) , in accordance with various aspects of the present disclosure.

Fig. 6 is a diagram illustrating an example of transmission of a configured grant uplink control information (CG-UCI) at a start of an FFP, in accordance with various aspects of the present disclosure.

Fig. 7 is a diagram illustrating tables of mappings between SRS combinations and row indexes of a COT sharing information table, in accordance with various aspects of the present disclosure.

Fig. 8 is a diagram illustrating an example of mappings between SRS resource combinations and row indexes of a COT sharing information table, in accordance with various aspects of the present disclosure.

Fig. 9 is a diagram illustrating an example of mappings between SRS resource combinations and row indexes of a COT sharing information table when frequency division multiplexing of SRS transmissions is not allowed, in accordance with various aspects of the present disclosure.

Figs. 10 and 11 are diagrams illustrating examples of indication of whether a BS can share a COT based at least in part on an SRS resource, in accordance with various aspects of the present disclosure.

Fig. 12 is a diagram illustrating an example of indication of a priority level associated with a data transmission in a configured grant (CG) , in accordance with various aspects of the present disclosure.

Fig. 13 is a diagram illustrating an example of indication of a priority level associated with a data transmission in a CG, in accordance with various aspects of the present disclosure.

Fig. 14 is a diagram illustrating an example of indication of an MCS associated with a data transmission in a CG, in accordance with various aspects of the present disclosure.

Fig. 15 is a diagram illustrating tables used to indicate an MCS for a data transmission, in accordance with various aspects of the present disclosure.

Figs. 16-18 are diagrams illustrating example processes associated with transmission of a signal to secure a COT, in accordance with various aspects of the present disclosure.

Figs. 19-20 are block diagrams of example apparatuses for wireless communication, in accordance with various aspects of the present disclosure.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, and/or the like (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

It should be noted that while aspects may be described herein using terminology commonly associated with a 5G or NR radio access technology (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and/or a RAT subsequent to 5G (e.g., 6G) .

Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with various aspects of the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network, an LTE network, and/or the like. The wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.

A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) . A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In the example shown in Fig. 1, a BS 110a may be a macro BS for a macro cell 102a, a BS 110b may be a pico BS for a pico cell 102b, and a BS 110c may be a femto BS for a femto cell 102c. A BS may support one or multiple (e.g., three) cells. The terms “eNB” , “base station” , “NR BS” , “gNB” , “TRP” , “AP” , “node B” , “5G NB” , and “cell” may be used interchangeably herein.

In some aspects, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS. In some aspects, the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.

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

Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts) .

A network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs. Network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.

UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be stationary or mobile. A UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like. A UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

Some UEs may 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, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity. A wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered a Customer Premises Equipment (CPE) . UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like. In some aspects, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, electrically coupled, and/or the like.

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, an air interface, and/or the like. A frequency may also be referred to as a carrier, a frequency channel, and/or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some aspects, 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 a base station 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like. In this case, the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.

Devices of wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided based on frequency or wavelength into various classes, bands, channels, and/or the like. For example, devices of wireless network 100 may communicate using an operating band having a first frequency range (FR1) , which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2) , which may span from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a “sub-6 GHz” band. Similarly, FR2 is often referred to as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. Thus, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies less than 6 GHz, frequencies within FR1, and/or mid-band frequencies (e.g., greater than 7.125 GHz) . Similarly, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz) . It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.

As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.

Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with various aspects of the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T ≥ 1 and R ≥ 1.

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

At UE 120, antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280. The term "controller/processor" may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like. In some aspects, one or more components of UE 120 may be included in a housing 284.

Network controller 130 may include communication unit 294, controller/processor 290, and memory 292. Network controller 130 may include, for example, one or more devices in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

On the uplink, at UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna (s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein.

At base station 110, the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240. Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244. Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna (s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein.

Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with user equipment initiated channel occupancy time (COT) with transmission of a sounding reference signal (SRS) , as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 1600 of Fig. 16, process 1700 of Fig. 17, process 1800 of Fig. 18, and/or other processes as described herein.

Memories

242 and 282 may store data and program codes 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, the one or more instructions, when executed (e.g., directly, or after compiling, converting, interpreting, and/or the like) by one or more processors of the base station 110 and/or the UE 120, may cause the one or more processors, the UE 120, and/or the base station 110 to perform or direct operations of, for example, process 1600 of Fig. 16, process 1700 of Fig. 17, process 1800 of Fig. 18, and/or other processes as described herein. In some aspects, executing instructions may include running the instructions, converting the instructions, compiling the instructions, interpreting the instructions, and/or the like.

In some aspects, the UE includes means for determining a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and/or means for transmitting a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP. The means for the UE to perform operations described herein may include, for example, antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, and/or memory 282.

In some aspects, the UE includes means for receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information. In some aspects, the UE includes means for receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal. In some aspects, the UE includes means for performing the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, the UE includes means for performing channel acquisition to acquire a COT; and/or means for transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level. In some aspects, the UE includes means for performing the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, the UE includes means for performing channel acquisition to acquire a COT; and/or means for transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and/or means for performing the data transmission in the COT based at least in part on the modulation and coding scheme.

As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.

Some RATs, such as NR unlicensed (NR-U) , provide for communication on unlicensed spectrum. Unlicensed spectrum can be accessed by devices without obtaining a license to access the unlicensed spectrum or purchasing spectrum at auction. Unlicensed spectrum may generally be associated with a higher likelihood of interference than licensed spectrum due to the non-centrally-scheduled nature of unlicensed spectrum. Access to unlicensed spectrum may be governed by regulations, which may provide mechanisms for accessing the unlicensed spectrum. For example, to combat interference, a device may perform channel acquisition, such as a listen before talk (LBT) procedure or a channel clear assessment (CCA) , to determine a COT in which the device can communicate. In some cases, the device may communicate based at least in part on an FFP, described in more detail elsewhere herein.

To conform to unlicensed band regulations, a UE may need to transmit immediately at the beginning of the FFP if the UE acquires the channel successfully. If the starting point of FFP is not aligned with a starting point of an uplink channel for a transmission by the UE, the UE may lose the FFP or the COT, meaning that the UE cannot perform a transmission in the FFP or share the FFP with a base station. Furthermore, in some cases, even if the starting point of the FFP is aligned with the starting point of an uplink channel, there may be no uplink data to transmit on the uplink channel. If the UE loses the transmission opportunity associated with the FFP, the UE and the base station may have fewer opportunities for communication, thereby decreasing throughput and reducing utilization of unlicensed spectrum.

Some deployments may use ultra-reliable low-latency communication (URLLC) services. In some aspects, a UE may support multiple different priority levels for traffic, such as associated with enhanced mobile broadband (eMBB) and URLLC services. In this case, the UE may be configured with configured grants (CGs) with different priority levels corresponding to eMBB and URLLC. Each CG of the UE may be configured with a periodicity and/or offset. In some cases, after the UE acquires a COT, there may be a CG resource with low priority in the COT, while there is no low priority data to be transmitted. Similarly, there may be a CG resource with higher priority in the COT while there is no high priority data to be transmitted. If the UE is to perform a data transmission associated with a different priority level than a CG in a COT acquired by the UE, then the UE may have to wait until the first available CG resource with a matching priority level, which may increase the latency and which may lead to the UE failing to acquire the COT in the following FFP. Furthermore, one CG may be configured with multiple MCSs, and the UE can select one of the MCSs based at least in part on a requirement of the UE (such as based at least in part on a URLLC or eMBB service associated with a data transmission) . However, the base station may not know which MCS is selected, or whether the UE is performing a data transmission associated with a different priority level and/or MCS than a CG used to perform the data transmission. Such ambiguity may lead to inefficient resource allocation and increased computing resource usage.

Some techniques and apparatuses described herein provide for a UE to transmit a signal at a start of an FFP associated with a COT, irrespective of whether the UE has a data transmission scheduled for the start of the FFP. For example, the UE may transmit the signal when the UE does not have a data transmission scheduled for the start of the FFP. In some aspects, the signal may include one or more SRSs. For example, the one or more SRSs may indicate information regarding COT sharing of the COT, information regarding CG resource sharing, and/or the like. In some aspects, the signal may include CG uplink control information (CG-UCI) , such as CG-UCI without an uplink shared channel (UL-SCH) . In this way, the UE may secure the FFP even if the UE is not associated with a data transmission at the start of the COT, which increases channel access and throughput for the UE and the base station. Furthermore, by indicating information regarding COT sharing or CG sharing using the signal, the UE may enable the base station to share the COT or the CG, which increases throughput and improves network resource utilization.

Some techniques and apparatuses described herein provide for a UE to use a CG associated with a first priority level for a data transmission associated with a second priority level. For example, the UE may use a CG associated with a low priority level for a data transmission associated with a high priority level, or the UE may use a CG associated with a high priority level for a data transmission associated with a low priority level. In some aspects, the UE may provide an indication of the priority level of the data transmission to be performed in the CG (e.g., using one or more SRSs) . In some aspects, the UE may provide an indication of an MCS of the data transmission to be performed in the CG (e.g., using one or more SRSs) . Thus, the UE may utilize a CG for a data transmission with a different priority level than the CG, which improves utilization of network resources and increases throughput. Furthermore, the UE may provide an indication of the priority level of the data transmission and/or the MCS of the data transmission, which improves utilization of network resources and enables the base station to efficiently receive and/or process the data transmission.

Fig. 3 is a diagram illustrating an example 300 of channel access in unlicensed spectrum, in accordance with various aspects of the present disclosure. Example 300 shows an FFP for channel access by frame based equipment (FBE) . In the FBE approach, channel sensing is performed at fixed instants referred to herein as sensing occasions, such as shown by reference number 310. For example, the sensing occasion may precede the start of an FFP. If the sensing device determines that the channel is busy based at least in part on the channel sensing (e.g., based at least in part on a one-shot LBT operation and/or the like) , then the sensing device may back off until a next sensing occasion, which may occur at the start of a next FFP. The FBE approach may be referred to as an FBE mode or a semi-static channel access mode.

A sensing device may use the FBE mode based at least in part on system information. For example, an FBE mode may be indicated in remaining minimum system information (RMSI) (e.g., for semi-static channel access) . A configuration for the FFP may be included in system information block 1 (SIB-1) , or the configuration may be signaled for a UE with UE-specific radio resource control (RRC) signaling (e.g., for the FBE secondary cell use case) .

In some aspects, the FFP may have a length of, for example, 1ms, 2ms, 2.5ms, 4ms, 5ms, 10ms, or the like. The starting positions of FFPs within every two radio frames may start from an even radio frame, and may be defined by i*P, where i = {0, 1, .., 20/P-1} and where P is the FFP length in milliseconds. The idle period for a given subcarrier spacing may be given by: ceil (Minimum idle period allowed by regulations /Ts) , where “Minimum idle period allowed by regulations” is the maximum of 5%of the FFP or 100μs, and Ts is the symbol duration for the given subcarrier spacing.

For the semi-static channel access mode, the UE may support using the transmission of any scheduled/configured uplink channel/signal to initiate a COT by a UE in an RRC connected mode. For example, the UE may initiate the COT by transmitting a scheduled or configured uplink channel or signal. The UE may initiate a COT in an FFP associated with the UE, if the UE transmits a UL transmission burst starting at the beginning of the FFP and ending at any symbol before the FFP’s idle period after a successful CCA of 9μs immediately before the UL transmission burst.

As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.

Fig. 4 is a diagram illustrating an example 400 of transmission of a signal to secure a COT, in accordance with various aspects of the present disclosure. As shown, example 400 includes a UE (e.g., UE 120) and a BS (e.g., BS 110) . In example 400 (and other examples described herein) the UE may operate in an FBE mode, for example, based at least in part on receiving system information from the BS indicating to operate in the FBE mode.

As shown in Fig. 4, and by reference number 410, the UE may receive configuration information from the BS. In some aspects, the configuration information may relate to one or more SRSs. An SRS is a signal transmitted by the UE in the uplink direction which is used by the base station to estimate the uplink channel quality over a bandwidth. An SRS configuration may be semi-statically configurable by higher-layer (e.g., RRC) parameters. For example, an SRS configuration may indicate an SRS resource and parameters associated with the SRS resource, such as an SRS resource configuration identity, a number of SRS ports, time domain behavior of SRS resource configuration (e.g., periodic, semi-persistent, or aperiodic SRS transmission) , a slot level periodicity, a slot level offset, a number of orthogonal frequency division multiplexing (OFDM) symbols in the SRS resource, a starting OFDM symbol of the SRS resource within a slot including a repetition factor R as defined by the higher layer parameter resourceMapping, an SRS bandwidth, a frequency hopping bandwidth, a defining frequency domain position and/or configurable shift, a cyclic shift, a transmission comb value, a transmission comb offset, an SRS sequence identifier (ID) , or a configuration of a spatial relation between a reference RS and the target SRS.

In some aspects, the base station may configure one or more groups, where each group contains one or more SRS resources for the UE. For example, different groups may be for different purposes (e.g., one or more groups for beam management, one or more groups for downlink channel state information (CSI) acquisition, one or more groups for uplink CSI acquisition, and so on) . The UE may be configured with K ≥ 1 SRS resources, where a given X-port SRS resource spans N = 1, 2, or 4 adjacent symbols within a slot, and where all X ports are mapped to each symbol of the resource.

An SRS may be generated based at least in part on a root sequence. For example, the root sequence may be based at least in part on a Zadoff Chu sequence. An SRS sequence may be at least a function of the SRS sequence ID, which may be UE-specific and may be configured via RRC signaling. The SRS sequence may be associated with a cyclic shift (CS) and a comb value. For example, the SRS sequence may be associated with a maximum of 12 CS for comb value 4 and a maximum of 8 CS for comb value 2. An SRS may be mapped to multiple subcarriers based at least in part on the comb value. For example, a comb value of 2 may indicate that the SRS is mapped to every other subcarrier, whereas a comb value of 4 may indicate that the SRS is mapped to every fourth carrier. A CS may be used to generate multiple SRSs which are orthogonal to each other. For example, a CS of 12 may lead to 12 SRSs being generated on the same time and frequency resources. An SRS may be RRC configured to start at any OFDM symbol within a slot.

In some aspects, the configuration information may include information relating to a CG. A CG may identify a CG resource on which the UE can perform an uplink transmission. For example, the CG resource may indicate a priority level associated with the CG, an MCS associated with the CG, a periodicity and/or offset associated with the CG, and/or the like.

In some aspects, the UE may transmit a physical uplink shared channel (PUSCH) on the CG. In this case, the UE may include CG uplink control information (CG-UCI) in the CG-PUSCH transmission. For example, the UE may include a CG-UCI in every CG-PUSCH transmission. In some aspects, the CG-UCI may indicate a hybrid automatic repeat request (HARQ) ID, a new data indicator (NDI) , a redundancy version (RV) , COT sharing information (as described in more detail below) , and/or the like. To determine the number of resource elements (REs) used for CG-UCI, the mechanism of beta-offset NR for HARQ feedback on the CG-PUSCH is used. For example, an RRC parameter to configure the beta-offset for CG-UCI may be defined.

In some aspects, an RRC configuration (e.g., the configuration information) may indicate whether to multiplex the CG-UCI and a HARQ acknowledgment (ACK) . If the UE is configured to perform such multiplexing, in the case of a physical uplink control channel (PUCCH) overlapping with CG-PUSCH (s) within a PUCCH group, the CG-UCI and HARQ-ACK may be jointly encoded (e.g., the CG-UCI may be treated as the same type as a HARQ-ACK) . The UE may use a HARQ ACK rate matching rule to send CG-UCI or CG-UCI+HARQ ACK. If the UE is not configured to perform such multiplexing, in the case of the PUCCH overlapping with CG-PUSCH (s) within a PUCCH group and the PUCCH carrying HARQ ACK feedback, the UE may skip the CG-PUSCH.

As shown by reference number 420, the UE may determine a COT associated with an FFP, such as the FFP shown by reference number 430. For example, the UE may determine that the COT is available based at least in part on an LBT operation, a CCA assessment, or another form of channel access mechanism. As mentioned above, in some cases, the UE may not have a data transmission scheduled for a start of the FFP. In other cases, the UE may not have uplink data (e.g., an uplink shared channel (UL-SCH) to transmit on a scheduled data transmission at the start of the FFP. If the UE does not perform a transmission at the start of the FFP, then the UE may surrender the COT, and may have to perform another channel access operation at a start of a next FFP, which reduces throughput and increases latency associated with communications of the UE.

As shown by reference number 440, the UE may transmit a signal at a start of the FFP. For example, the UE may transmit the signal irrespective of whether the UE has a data transmission to perform at the start of the FFP. By transmitting the signal at the start of the FFP, the UE may successfully obtain the COT associated with the FFP, thus allowing the UE or a base station to communicate in the COT. As shown by reference number 450, in some aspects, the signal may indicate COT sharing information. The content of the signal, and the indication of COT sharing information, are described in more detail in connection with Figs. 5-12.

Fig. 5 is a diagram illustrating an example 500 of transmission of one or more SRSs at a start of an FFP, in accordance with various aspects of the present disclosure. The operations shown in Fig. 5 may be performed by a UE, such as UE 120 or the UE of Fig. 4. As shown in Fig. 5, the UE may pass an LBT operation at reference number 510, meaning the UE can use the COT shown by reference number 520. In order to secure the COT, the UE may transmit one or more SRSs, shown by reference number 530, at a start of the FFP that includes the COT. In some aspects, the UE may be configured with multiple SRS resources at the start of the FFP. Different SRS resources at the start of the FFP may be frequency division multiplexed (e.g., using different combs) or code division multiplexed (e.g., using different CSs) . The UE may transmit one or more SRSs on one or more of the configured SRS resources after a successful CCA (of, for example, 9 microseconds) before the SRS. In some aspects, the one or more SRSs may indicate UE COT sharing information, CG resource sharing information, and/or the like, as described in more detail elsewhere herein.

In some aspects, the UE may use a comb value of 2 or 4 for the set of SRSs. For example, the UE may use an existing SRS configuration, and may define a usage of the SRS for COT initiating. In some aspects, the UE may use a comb value greater than 4 for the set of SRSs, such as a comb value of 8, 12, 16, 24, or the like. Using a sparser comb value may enable greater multiplexing capacity for the SRS.

Fig. 6 is a diagram illustrating an example 600 of transmission of a CG-UCI at a start of an FFP, in accordance with various aspects of the present disclosure. As shown in Fig. 6, in some aspects, the signal transmitted at the start of the FFP may include a CG-UCI. For example, after passing an LBT operation (as shown by reference number 610) , the UE may transmit a CG-UCI shown by reference number 620 at the start of a corresponding FFP, shown by reference number 630. The UE may transmit the CG-UCI irrespective of whether the UE has a UL-SCH to transmit with the CG-UCI. In some aspects, the CG-UCI may indicate COT sharing information, as described in more detail elsewhere herein.

In some aspects, the CG-UCI may be transmitted using a PUCCH resource (e.g., a CG PUCCH resource configured by the configuration information shown by reference number 410 of Fig. 4) . For example, the UE may perform encoding and rate matching for the CG-UCI based at least in part on a rule for encoding and rate matching a HARQ-ACK on a PUCCH. In some aspects, the CG-UCI may be transmitted using a CG-PUSCH resource (e.g., a CG-PUSCH resource configured by the configuration information shown by reference number 410 of Fig. 4) . For example, the UE may perform encoding and rate matching for the CG-UCI using a HARQ-ACK rate matching rule for HARQ-ACK transmission on the PUSCH without a UL-SCH.

As mentioned above, in some aspects, the signal (e.g., the set of SRSs or the CG-UCI) may indicate COT sharing information. COT sharing information may indicate how a COT can be shared between the UE and the base station. For example, the COT sharing information may indicate a duration (e.g., a number of slots of a group of slots in which downlink transmissions can be performed within a COT) , an offset (e.g., a starting slot of a group of slots in which downlink transmissions can be performed within the COT) , or other information. In some aspects, the COT sharing information may indicate whether or not COT sharing is available. For example, the COT sharing information may include parameters for COT sharing if COT sharing is available and may otherwise carry an indication that COT sharing is not available. In some aspects, the COT sharing information may not indicate a duration. For example, the downlink transmission may continue until an end of the COT. In some aspects, the COT sharing information may not indicate an offset. For example, the starting slot of the downlink transmission may be the first slot after the SRS transmission.

In some aspects, a combination of SRS resources used to transmit the signal may indicate the COT sharing information. For example, the UE may be configured (e.g., via the configuration shown by reference number 410 or other signaling) with a table that indicates COT sharing information configurations. Different combinations of SRS resources may be mapped to different row indexes of the table, as shown in Figs. 7-9. For example, the rows of the table may indicate a duration, an offset, or other COT sharing information.

In some aspects, the mapping between the combination of the SRS resources and the row indexes may be predefined (e.g., in a wireless communication specification, an initial configuration of the UE, and/or the like) . For M configured SRS resources, an M-length bitmap is defined, where the least significant bit (LSB) may correspond to the first configured SRS resource, and the most significant bit (MSB) corresponds to the last configured SRS resource (or vice versa) . If an SRS is transmitted on a given SRS resource, the corresponding bit of the bitmap may be set to a value (e.g., 1) . If frequency division multiplexed SRS resources are configured, then depending on whether frequency division multiplexed SRS transmissions are allowed for a UE, the valid combination of SRS resources may be different. For example, if frequency division multiplexed SRS transmissions are allowed for a UE, all the possible combinations of configured SRS resources may be considered valid. Thus, the maximum row indexes that can be indicated by M SRS resources, if frequency division multiplexed SRS transmissions are allowed, is 2 ^M –1. If frequency division multiplexed SRS transmissions are not allowed for a UE, the combinations of SRS resources with simultaneous frequency division multiplexed SRS resources are not valid. In this case, the maximum number of row indexes that can be indicated by M SRS resources is less than 2 ^M –1. If the number of rows in the table is less than the maximum number of row indexes that can be indicated by the combinations of SRS resources, the remaining SRS combinations can be reserved.

Fig. 7 is a diagram illustrating tables 710, 720, 730, and 740 of mappings between SRS combinations and row indexes of a COT sharing information table, in accordance with various aspects of the present disclosure. Tables 710 and 730 correspond to examples where frequency division multiplexed SRS transmissions are allowed for a UE, so a frequency division multiplexed SRS (in which the first SRS and the second SRS are both transmitted) is mapped to row index 2 in table 710 and to row

indexes

2, 4, 5, and 6 in table 730. Tables 720 and 740 correspond to examples where frequency division multiplexed SRS transmissions are not allowed for the UE, so the frequency division multiplexed SRSs are invalid.

Fig. 8 is a diagram illustrating an example 800 of mappings between SRS resource combinations and row indexes of a COT sharing information table, in accordance with various aspects of the present disclosure. In example 800, different SRS resources are associated with different comb values and different CS values, as shown by reference number 810. For example, a first SRS resource is associated with a comb value of 0 (meaning that the first SRS resource is mapped on even carriers) and a CS of α ₀ (e.g., a first CS value) , and a second SRS resource is associated with a comb value of 1 and a CS of α ₁ (e.g., a second CS value) . Table 820 shows how the four SRS resources defined by the comb values of 0 and 1 and the CSs of α ₀ and α ₁ are mapped to row indexes of a COT sharing information table.

Fig. 9 is a diagram illustrating an example 900 of mappings between SRS resource combinations and row indexes of a COT sharing information table when frequency division multiplexing of SRS transmissions is not allowed, in accordance with various aspects of the present disclosure. The definition of the SRS resources is described in more detail in connection with Fig. 8. In table 910 of example 900, SRS combinations with multiple FDMed SRS resources are considered invalid.

In some aspects, the BS may determine whether the BS can share the COT based at least in part on whether a specific SRS is transmitted by the UE (e.g., using a specific SRS resource) . For example, if frequency division multiplexed SRS transmissions are not allowed for a UE, then the UE may transmit a signal on one of the frequency division multiplexed SRS resources. For example, considering an SRS resource associated with two combs, if an SRS resource with a first comb is used, the SRS may indicate that the base station can share the UE’s COT. If an SRS resource with a second comb is used, the SRS may indicate that the base station cannot share the UE’s COT. In some aspects, if frequency division multiplexed SRS transmission are allowed for a UE, then the UE may transmit multiple frequency division multiplexed SRS resources simultaneously. In some aspects, the specific SRS can be the first configured SRS. In some aspects, the specific SRS can be the last configured SRS. In some aspects, the specific SRS can be the first configured SRS with a lowest comb. In some aspects, the specific SRS can be the first configured SRS with lowest comb and smallest CS. In some aspects, if all the configured SRSs are transmitted, the BS can share the UE COT. For example, the UE may transmit on all configured SRSs if the BS is permitted to share the COT.

Figs. 10 and 11 are diagrams illustrating examples 1000 and 1100 of indication of whether a BS can share a COT based at least in part on an SRS resource, in accordance with various aspects of the present disclosure. Example 1000 illustrates a first case 1010 in which frequency division multiplexing of SRSs is not permitted, and a second case 1020 in which frequency division multiplexing of SRSs is permitted. In the first case 1010, a first SRS 1030 indicates that the BS can share the COT, and a second SRS 1040 indicates that the BS cannot share the COT. In the second case 1020, a first SRS 1050 indicates that the BS can share the COT, a second SRS 1060 indicates that the BS cannot share the COT, and the combination of the first and second SRSs (shown by reference number 1070) , indicates that the BS can share the COT. In example 1100 of Fig. 11, the transmission of all configured SRSs indicates that the BS can share the COT (as shown by reference number 1110) , and the transmission of less than all configured SRSs indicates that the BS cannot share the COT (as shown by reference number 1120) .

Returning to Fig. 4, as shown by reference number 460, in some aspects, the UE may receive a downlink transmission based at least in part on the COT sharing information. For example, the BS may determine resources for the downlink transmission in the COT based at least in part on the COT sharing information, and the BS may perform the downlink transmission in the COT in accordance with the COT information.

In some cases, a COT sharing ED threshold may not be configured. In this case, the combination of SRS resources may indicate whether or not the BS can share the COT secured by the UE. For example, if the combination of SRS resources indicates that the BS can share the COT, the BS may share the COT and may initiate the downlink transmission X symbols from the end of the slot where the combination of SRS resources is detected. X may be configurable, for example, via RRC signaling. In some aspects, the BS may start the downlink transmission at the end of the slot in which the combination of SRS resources is detected. In some aspects, if the ED threshold is not configured, the downlink transmission may not include a unicast transmission with user plan data, and the downlink transmission may not be longer than a threshold number of symbols based at least in part on a subcarrier spacing of the corresponding channel. For example, the downlink transmission may be limited to 2 symbols for a 15 kHz subcarrier spacing, 4 symbols for a 30 kHz subcarrier spacing, or 8 symbols for a 60 kHz subcarrier spacing.

As indicated above, Figs. 4-11 are provided as one or more examples. Other examples may differ from what is described with regard to Figs. 4-11.

Fig. 12 is a diagram illustrating an example 1200 of indication of a priority level associated with a data transmission in a CG, in accordance with various aspects of the present disclosure.

As shown by reference number 1210, the UE may determine a COT associated with an FFP. For example, the UE may secure or access the COT, for example, using the techniques described in connection with Figs. 4-11, though the operations described with regard to Fig. 12 can be performed independently of those described in connection with Figs. 4-11.

As shown by reference number 1220, the UE may transmit a signal. For example, the signal may include one or more SRSs. As further shown, the signal may indicate that a CG associated with the COT is to be used for a data transmission associated with a different priority level than the CG. For example, the data transmission may be associated with a first priority level and the CG may be associated with a second priority level. In some aspects, the first priority level may be higher than the second priority level. In some aspects, the first priority level may be lower than the second priority level. The priority levels may include, for example, quality of service (QoS) levels, QoS flow identifiers, traffic type indications, and/or the like.

In some aspects, the signal may be transmitted on a combination of SRS resources. The combination of SRS resources may indicate that the data transmission is associated with a different priority level than the CG. Thus, the signal or the combination of SRS resources may be referred to as a priority indication. In some aspects, a mapping between the combination of SRS resources and the priority indication can be predefined. For example, two SRS resources can be configured: a first SRS resource associated with a first SRS and a second SRS resource associated with a second SRS. If the first SRS is transmitted and the second SRS is not transmitted, this may indicate that a low-priority CG is used for a high-priority data transmission. If the first SRS is not transmitted and the second SRS is transmitted, this may indicate that the high-priority CG is used for low-priority data. If both SRSs are transmitted, this may indicate that the same priority CG is used for same priority data.

As shown by reference number 1230, the UE may perform the data transmission on the CG in the COT. For example, the UE may perform the data transmission with the first priority level. By indicating, to the base station, that the CG is to be used for the data transmission, the UE enables the base station to process the data transmission in accordance with the first priority level, which improves likelihood that the first priority level is satisfied and reduces the likelihood of improper allocation of base station resources.

A CG may be associated with an MCS and a transport block size (TBS) . For example, the MCS and/or the TBS may be based at least in part on the priority level associated with the MCS. A data transmission may also be associated with an MCS and a TBS, which may be the same as the MCS associated with the CG, or the data transmission may be different than the MCS associated with the CG. In some aspects, the UE may transmit the data transmission using an MCS associated with the priority level of the data transmission (e.g., rather than an MCS associated with the CG. In other words, if a low priority CG is used to transmit a high priority data transmission, the UE may transmit the high priority data transmission using an MCS configured for the high priority CG. Similarly, if a high priority CG is used for a low priority data transmission, the UE may transmit the low priority data transmission using an MCS configured for the low priority data transmission. In the above cases, the data transmission may be transmitted using a maximum TBS associated with the data transmission (e.g., as opposed to a maximum TBS associated with the CG) . If the CG resource is not sufficient for the maximum TBS associated with the data transmission, then the UE may transmit the data transmission according to a TBS associated with the CG resource.

Fig. 13 is a diagram illustrating an example 1300 of indication of a priority level associated with a data transmission in a CG, in accordance with various aspects of the present disclosure. The operations of example 1300 may be performed by a UE (e.g., UE 120) .

As shown by reference number 1310, the UE may be associated with a CG configuration associated with a low priority level. As shown by reference number 1320, the UE may be associated with a CG configuration associated with a high priority level. These CG configurations may be associated with respective MCSs. The CG resources indicated by the CG configurations are shown by

reference numbers

1330 and 1340. As shown, the CG resource associated with the high priority level occurs in each FFP and the CG resource associated with the low priority level occurs in every other FFP.

As shown by reference number 1350, high priority traffic may arrive after the CG resource shown by reference number 1340. Therefore, if the UE is to perform a data transmission for the high priority traffic, the UE may have to wait for two FFPs until the next high priority CG resource, thereby introducing latency. As shown by reference number 1360, the UE may transmit the high priority traffic on the low priority CG using an MCS associated with the high priority traffic. In this case, the SRS shown by reference number 1370 may indicate that the high priority traffic and the low priority CG are associated with different priority levels, or the SRS may indicate the respective priority levels of the high priority traffic and the low priority CG. Thus, the UE improves utilization of resources and reduces latency.

As indicated above, Figs. 12 and 13 are provided as one or more examples. Other examples may differ from what is described with regard to Figs. 12 and 13.

Fig. 14 is a diagram illustrating an example 1400 of indication of an MCS associated with a data transmission in a CG, in accordance with various aspects of the present disclosure. In example 1400, the UE has determined to transmit a data transmission in a CG resource which is configured with multiple MCSs. Therefore, the data transmission is to be transmitted with one of the MCSs associated with the CG resource.

As shown by reference number 1410, the UE may transmit a signal indicating the MCS associated with the data transmission. For example, the UE may transmit the signal indicating the MCS based at least in part on the data transmission being associated with one of the MCSs associated with the CG.

As shown by reference number 1410, the UE may determine a COT associated with an FFP. For example, the UE may secure or access the COT, for example, using the techniques described in connection with Figs. 4-11, though the operations described with regard to Fig. 14 can be performed independently of those described in connection with Figs. 4-11.

As shown by reference number 1420, the UE may transmit a signal. For example, the signal may include one or more SRSs. As further shown, the signal may indicate an MCS for the data transmission to be performed via the CG. For example, the data transmission may be associated with a lower MCS associated with the CG if the data transmission is for high priority traffic. The data transmission may be associated with a higher MCS associated with the CG if the data transmission is for low priority traffic.

In some aspects, the signal may be transmitted on a combination of SRS resources. The combination of SRS resources may indicate the MCS to be used for the data transmission. Fig. 15 is a diagram illustrating tables 1500 and 1510 used to indicate an MCS for a data transmission, in accordance with various aspects of the present disclosure. For example, table 1500 and/or table 1510 may be used to indicate the MCS used for the data transmission shown by reference number 1420 of Fig. 14.

Table 1500 shows an example where a bitmap is used to indicate the MCS, and each bit corresponds to an MCS. Table 1500 relates to two MCSs and two SRSs, but this approach can be applied for any number of MCSs and SRS resources. For example, for a CG configured with N MCSs, the UE may be configured with N SRS resources. As shown by reference number 1520, if the first SRS is transmitted and the remaining SRS resources are not transmitted, the lowest MCS may be used. As shown by reference number 1530, if the second SRS is transmitted and the remaining SRS resources are not transmitted, the second lowest MCS may be used.

Table 1510 shows an example where a bitmap is used to indicate the MCS, and each value of the bitmap corresponds to an MCS. For example, for a CG configured with N MCSs, the UE can be configured with

(e.g., the ceiling of the natural logarithm of N+1) SRS resources. The

SRS resources may define a

bitmap where the LSB (in one example) corresponds to the first configured SRS resource, and the MSB (in one example) corresponds to the last configured SRS resource. Then, different values of the bitmap, as indicated by rows of table 1510, may indicate the MCS to be used.

Returning to Fig. 14, as shown by reference number 1430, the UE may perform the data transmission on the CG in the COT. For example, the UE may perform the data transmission using the indicated MCS. By indicating, to the base station, that the CG is to be used for the data transmission, the UE enables the base station to process the data transmission in accordance with the first priority level, which improves likelihood that the first priority level is satisfied and reduces the likelihood of improper allocation of base station resources.

As indicated above, Figs. 14-15 are provided as one or more examples. Other examples may differ from what is described with regard to Figs. 14-15.

Fig. 16 is a diagram illustrating an example process 1600 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1600 is an example where the UE (e.g., UE 120) performs operations associated with a UE initiated COT with transmission of an SRS.

As shown in Fig. 16, in some aspects, process 1600 may include determining a COT associated with an FFP (block 1610) . For example, the UE (e.g., using determination component 1908, depicted in Fig. 19) may determine a COT associated with an FFP, as described above.

As further shown in Fig. 16, in some aspects, process 1600 may include transmitting a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP (block 1620) . For example, the UE (e.g., using transmission component 1904, depicted in Fig. 19) may transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP, as described above.

Process 1600 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.

In a first aspect, the signal comprises one or more sounding reference signals (SRSs) .

In a second aspect, alone or in combination with the first aspect, the UE is configured with one or more SRS resources at the start of the FFP.

In a third aspect, alone or in combination with one or more of the first and second aspects, the one or more SRSs indicate information regarding sharing of the COT.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the one or more SRSs are configured with a comb value of 2 or 4.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the one or more SRSs are configured with a comb value greater than 4.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the signal includes configured grant uplink control information (CG-UCI) .

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the CG-UCI is transmitted in a physical uplink control channel resource.

In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the CG-UCI is transmitted in a CG physical uplink shared channel resource.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the signal indicates COT sharing information associated with the COT.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, an energy detection threshold associated with COT resource sharing is configured, and the COT sharing information includes information indicating at least one of a number of slots where a downlink transmission can be assumed within the COT, an offset associated with the number of slots, or that COT resource sharing is not available.

In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, process 1600 includes receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, an energy detection threshold associated with COT resource sharing is not configured, and the COT sharing information includes information indicating whether COT resource sharing is available.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, process 1600 includes receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.

In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the downlink transmission is associated with a maximum duration or a transmission type limitation.

In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.

In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.

In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, the signal includes a set of sounding reference signals (SRSs) , and the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, process 1600 includes performing the data transmission using a modulation and coding scheme associated with the second priority level.

In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the signal includes a set of sounding reference signals (SRSs) , and the set of SRSs indicate a modulation and coding scheme associated with the data transmission.

Although Fig. 16 shows example blocks of process 1600, in some aspects, process 1600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 16. Additionally, or alternatively, two or more of the blocks of process 1600 may be performed in parallel.

Fig. 17 is a diagram illustrating an example process 1700 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1700 is an example where the UE (e.g., UE 120) performs operations associated with a UE initiated COT with transmission of an SRS.

As shown in Fig. 17, in some aspects, process 1700 may include determining a COT (block 1710) . For example, the UE (e.g., using determination component 1908, depicted in Fig. 19) may determine a COT, as described above. As used herein, “determining a COT” may refer to performing channel access to acquire the COT.

As further shown in Fig. 17, in some aspects, process 1700 may include transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level (block 1720) . For example, the UE (e.g., using transmission component 1904, depicted in Fig. 19) may transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level, as described above.

Process 1700 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein, such as process 1600 of Fig. 16.

In a first aspect, process 1700 includes performing the data transmission using a modulation and coding scheme associated with the second priority level.

Although Fig. 17 shows example blocks of process 1700, in some aspects, process 1700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 17. Additionally, or alternatively, two or more of the blocks of process 1700 may be performed in parallel.

Fig. 18 is a diagram illustrating an example process 1800 performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 1800 is an example where the UE (e.g., UE 120) performs operations associated with a UE initiated COT with transmission of an SRS.

As shown in Fig. 18, in some aspects, process 1800 may include determining a COT (block 1810) . For example, the UE (e.g., using determination component 1908, depicted in Fig. 19) may determine a COT, as described above.

As further shown in Fig. 18, in some aspects, process 1800 may include transmitting a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission (block 1820) . For example, the UE (e.g., using transmission component 1904, depicted in Fig. 19) may transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission, as described above.

As further shown in Fig. 18, in some aspects, process 1800 may include performing the data transmission in the COT based at least in part on the modulation and coding scheme (block 1830) . For example, the UE (e.g., using transmission component 1904, depicted in Fig. 19) may perform the data transmission in the COT based at least in part on the modulation and coding scheme, as described above.

Process 1800 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein, such as process 1600 of Fig. 16 or process 1700 of Fig. 17.

Although Fig. 18 shows example blocks of process 1800, in some aspects, process 1800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 18. Additionally, or alternatively, two or more of the blocks of process 1800 may be performed in parallel.

Fig. 19 is a block diagram of an example apparatus 1900 for wireless communication. The apparatus 1900 may be a UE, or a UE may include the apparatus 1900. In some aspects, the apparatus 1900 includes a reception component 1902 and a transmission component 1904, which may be in communication with one another (for example, via one or more buses and/or one or more other components) . As shown, the apparatus 1900 may communicate with another apparatus 1906 (such as a UE, a base station, or another wireless communication device) using the reception component 1902 and the transmission component 1904. As further shown, the apparatus 1900 may include a determination component 1908, among other examples.

In some aspects, the apparatus 1900 may be configured to perform one or more operations described herein in connection with Figs. 3-15. Additionally, or alternatively, the apparatus 1900 may be configured to perform one or more processes described herein, such as process 1600 of Fig. 16, process 1700 of Fig. 17, process 1800 of Fig. 18, or a combination thereof. In some aspects, the apparatus 1900 and/or one or more components shown in Fig. 19 may include one or more components of the UE described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 19 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component 1902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1906. The reception component 1902 may provide received communications to one or more other components of the apparatus 1900. In some aspects, the reception component 1902 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1906. In some aspects, the reception component 1902 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.

The transmission component 1904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1906. In some aspects, one or more other components of the apparatus 1906 may generate communications and may provide the generated communications to the transmission component 1904 for transmission to the apparatus 1906. In some aspects, the transmission component 1904 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1906. In some aspects, the transmission component 1904 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. In some aspects, the transmission component 1904 may be collocated with the reception component 1902 in a transceiver.

The determination component 1908 may determine a COT associated with an FFP. In some aspects, the determination component 1908 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. The transmission component 1904 may transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.

The reception component 1902 may receive, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information. The reception component 1902 may receive, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal. The transmission component 1904 may perform the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, the transmission component 1904 may transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.

The transmission component 1904 may perform the data transmission using a modulation and coding scheme associated with the second priority level.

In some aspects, the transmission component 1904 may transmit a signal that includes a set of SRSs, wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission.

The number and arrangement of components shown in Fig. 19 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 19. Furthermore, two or more components shown in Fig. 19 may be implemented within a single component, or a single component shown in Fig. 19 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 19 may perform one or more functions described as being performed by another set of components shown in Fig. 19.

Fig. 20 is a block diagram of an example apparatus 2000 for wireless communication. The apparatus 2000 may be a base station, or a base station may include the apparatus 2000. In some aspects, the apparatus 2000 includes a reception component 2002 and a transmission component 2004, which may be in communication with one another (for example, via one or more buses and/or one or more other components) . As shown, the apparatus 2000 may communicate with another apparatus 2006 (such as a UE, a base station, or another wireless communication device) using the reception component 2002 and the transmission component 2004. As further shown, the apparatus 2000 may include a configuration component 2008, among other examples.

In some aspects, the apparatus 2000 may be configured to perform one or more operations described herein in connection with Figs. 3-15. Additionally, or alternatively, the apparatus 2000 may be configured to perform one or more processes described herein, such as process 1600 of Fig. 16, process 1700 of Fig. 17, process 1800 of Fig. 18, one or more of the examples 400, 1200, or 1400, or a combination thereof. In some aspects, the apparatus 2000 and/or one or more components shown in Fig. 20 may include one or more components of the base station described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 20 may be implemented within one or more components described above in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.

The reception component 2002 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 2006. The reception component 2002 may provide received communications to one or more other components of the apparatus 2000. In some aspects, the reception component 2002 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 2006. In some aspects, the reception component 2002 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2.

The transmission component 2004 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 2006. In some aspects, one or more other components of the apparatus 2006 may generate communications and may provide the generated communications to the transmission component 2004 for transmission to the apparatus 2006. In some aspects, the transmission component 2004 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 2006. In some aspects, the transmission component 2004 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2. In some aspects, the transmission component 2004 may be collocated with the reception component 2002 in a transceiver.

The configuration component 2008 may configure a UE 2006 to perform one or more of the operations described herein, for example, in connection with reference number 410 of Fig. 4. In some aspects, the configuration component 2008 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the base station described above in connection with Fig. 2. The reception component 2002 may receive a signal from the UE 2006 at a start of a COT. The signal may indicate COT sharing information. The transmission component 2004 may perform a transmission to the UE 2006 in the COT based at least in part on the COT sharing information. For example, the transmission component 2004 may transmit a downlink transmission in one or more resources indicated by the COT sharing information.

The number and arrangement of components shown in Fig. 20 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 20. Furthermore, two or more components shown in Fig. 20 may be implemented within a single component, or a single component shown in Fig. 20 may be implemented as multiple, distributed components. Additionally or alternatively, a set of (one or more) components shown in Fig. 20 may perform one or more functions described as being performed by another set of components shown in Fig. 20.

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

As used herein, the term “component” is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and/or a combination of hardware and software. It will be apparent that systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and/or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to specific software code-it being understood that software and hardware can be designed to implement the systems and/or methods based, at least in part, on the description herein.

As used herein, satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.

Even though particular combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may directly depend on only one claim, the disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. A phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, and/or the like) , and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and/or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .

Claims

A method of wireless communication performed by a user equipment (UE) , comprising:

determining a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and

transmitting a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.
The method of claim 1, wherein the signal comprises one or more sounding reference signals (SRSs) .
The method of claim 2, wherein the UE is configured with one or more SRS resources at the start of the FFP.
The method of claim 2, wherein the one or more SRSs indicate information regarding sharing of the COT.
The method of claim 2, wherein the one or more SRSs are configured with a comb value of 2 or 4.
The method of claim 2, wherein the one or more SRSs are configured with a comb value greater than 4.
The method of claim 1, wherein the signal includes configured grant uplink control information (CG-UCI) .
The method of claim 7, wherein the CG-UCI is transmitted in a physical uplink control channel resource.
The method of claim 7, wherein the CG-UCI is transmitted in a CG physical uplink shared channel resource.
The method of claim 1, wherein the signal indicates COT sharing information associated with the COT.
The method of claim 10, wherein the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.
The method of claim 10, wherein an energy detection threshold associated with COT resource sharing is configured, and wherein the COT sharing information includes information indicating at least one of:

a number of slots where a downlink transmission can be assumed within the COT,

an offset associated with the number of slots, or

that COT resource sharing is not available.
The method of claim 12, further comprising:

receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.
The method of claim 10, wherein an energy detection threshold associated with COT resource sharing is not configured, and wherein the COT sharing information includes information indicating whether COT resource sharing is available.
The method of claim 14, further comprising:

receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.
The method of claim 15, wherein the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.
The method of claim 15, wherein the downlink transmission is associated with a maximum duration or a transmission type limitation.
The method of claim 1, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.
The method of claim 1, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.
The method of claim 1, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The method of claim 20, further comprising:

performing the data transmission using a modulation and coding scheme associated with the second priority level.
The method of claim 1, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicate a modulation and coding scheme associated with the data transmission.
A method of wireless communication performed by a user equipment (UE) , comprising:

performing channel acquisition to acquire a channel occupancy time (COT) ; and

transmitting a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The method of claim 23, further comprising:

performing the data transmission using a modulation and coding scheme associated with the second priority level.
A method of wireless communication performed by a user equipment (UE) , comprising:

performing channel acquisition to acquire a channel occupancy time (COT) ; and

transmitting a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and

performing the data transmission in the COT based at least in part on the modulation and coding scheme.
A user equipment (UE) for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

determine a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and

transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.
The UE of claim 26, wherein the signal comprises one or more sounding reference signals (SRSs) .
The UE of claim 27, wherein the UE is configured with one or more SRS resources at the start of the FFP.
The UE of claim 27, wherein the one or more SRSs indicate information regarding sharing of the COT.
The UE of claim 27, wherein the one or more SRSs are configured with a comb value of 2 or 4.
The UE of claim 27, wherein the one or more SRSs are configured with a comb value greater than 4.
The UE of claim 26, wherein the signal includes configured grant uplink control information (CG-UCI) .
The UE of claim 32, wherein the CG-UCI is transmitted in a physical uplink control channel resource.
The UE of claim 32, wherein the CG-UCI is transmitted in a CG physical uplink shared channel resource.
The UE of claim 26, wherein the signal indicates COT sharing information associated with the COT.
The UE of claim 35, wherein the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.
The UE of claim 35, wherein an energy detection threshold associated with COT resource sharing is configured, and wherein the COT sharing information includes information indicating at least one of:

a number of slots where a downlink transmission can be assumed within the COT,

an offset associated with the number of slots, or

that COT resource sharing is not available.
The UE of claim 37, wherein the one or more processors are further configured to:

receive, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.
The UE of claim 35, wherein an energy detection threshold associated with COT resource sharing is not configured, and wherein the COT sharing information includes information indicating whether COT resource sharing is available.
The UE of claim 39, wherein the one or more processors are further configured to:

receive, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.
The UE of claim 40, wherein the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.
The UE of claim 40, wherein the downlink transmission is associated with a maximum duration or a transmission type limitation.
The UE of claim 26, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.
The UE of claim 26, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.
The UE of claim 26, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The UE of claim 45, wherein the one or more processors are further configured to:

perform the data transmission using a modulation and coding scheme associated with the second priority level.
The UE of claim 26, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicate a modulation and coding scheme associated with the data transmission.
A UE for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

perform channel acquisition to acquire a channel occupancy time (COT) ; and

transmit a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The UE of claim 48, wherein the one or more processors are further configured to:

perform the data transmission using a modulation and coding scheme associated with the second priority level.
A UE for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

perform channel acquisition to acquire a channel occupancy time (COT) ; and

transmit a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and

perform the data transmission in the COT based at least in part on the modulation and coding scheme.
A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of a user equipment (UE) , cause the UE to:

determine a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and

transmit a signal at a start of the FFP when the UE has no uplink data transmission to be performed at the start of the FFP.
The non-transitory computer-readable medium of claim 51, wherein the signal comprises one or more sounding reference signals (SRSs) .
The non-transitory computer-readable medium of claim 52, wherein the UE is configured with one or more SRS resources at the start of the FFP.
The non-transitory computer-readable medium of claim 52, wherein the one or more SRSs indicate information regarding sharing of the COT.
The non-transitory computer-readable medium of claim 52, wherein the one or more SRSs are configured with a comb value of 2 or 4.
The non-transitory computer-readable medium of claim 52, wherein the one or more SRSs are configured with a comb value greater than 4.
The non-transitory computer-readable medium of claim 51, wherein the signal includes configured grant uplink control information (CG-UCI) .
The non-transitory computer-readable medium of claim 57, wherein the CG-UCI is transmitted in a physical uplink control channel resource.
The non-transitory computer-readable medium of claim 57, wherein the CG-UCI is transmitted in a CG physical uplink shared channel resource.
The non-transitory computer-readable medium of claim 51, wherein the signal indicates COT sharing information associated with the COT.
The non-transitory computer-readable medium of claim 60, wherein the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.
The non-transitory computer-readable medium of claim 60, wherein an energy detection threshold associated with COT resource sharing is configured, and wherein the COT sharing information includes information indicating at least one of:

a number of slots where a downlink transmission can be assumed within the COT,

an offset associated with the number of slots, or

that COT resource sharing is not available.
The non-transitory computer-readable medium of claim 62, wherein the one or more instructions further cause the UE to:

receive, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.
The non-transitory computer-readable medium of claim 60, wherein an energy detection threshold associated with COT resource sharing is not configured, and wherein the COT sharing information includes information indicating whether COT resource sharing is available.
The non-transitory computer-readable medium of claim 64, wherein the one or more instructions further cause the UE to:

receive, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.
The non-transitory computer-readable medium of claim 65, wherein the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.
The non-transitory computer-readable medium of claim 65, wherein the downlink transmission is associated with a maximum duration or a transmission type limitation.
The non-transitory computer-readable medium of claim 51, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.
The non-transitory computer-readable medium of claim 51, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.
The non-transitory computer-readable medium of claim 51, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The non-transitory computer-readable medium of claim 70, wherein the one or more instructions further cause the UE to:

perform the data transmission using a modulation and coding scheme associated with the second priority level.
The non-transitory computer-readable medium of claim 51, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicate a modulation and coding scheme associated with the data transmission.
A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of an UE, cause the UE to:

perform channel acquisition to acquire a channel occupancy time (COT) ; and

transmit a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The non-transitory computer-readable medium of claim 73, wherein the one or more instructions further cause the UE to:

perform the data transmission using a modulation and coding scheme associated with the second priority level.
A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:

one or more instructions that, when executed by one or more processors of an UE, cause the UE to:

perform channel acquisition to acquire a channel occupancy time (COT) ; and

transmit a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and

perform the data transmission in the COT based at least in part on the modulation and coding scheme.
An apparatus for wireless communication, comprising:

means for determining a channel occupancy time (COT) associated with a fixed frame period (FFP) ; and

means for transmitting a signal at a start of the FFP when the apparatus has no uplink data transmission to be performed at the start of the FFP.
The apparatus of claim 76, wherein the signal comprises one or more sounding reference signals (SRSs) .
The apparatus of claim 77, wherein the UE is configured with one or more SRS resources at the start of the FFP.
The apparatus of claim 77, wherein the one or more SRSs indicate information regarding sharing of the COT.
The apparatus of claim 77, wherein the one or more SRSs are configured with a comb value of 2 or 4.
The apparatus of claim 77, wherein the one or more SRSs are configured with a comb value greater than 4.
The apparatus of claim 76, wherein the signal includes configured grant uplink control information (CG-UCI) .
The apparatus of claim 82, wherein the CG-UCI is transmitted in a physical uplink control channel resource.
The apparatus of claim 82, wherein the CG-UCI is transmitted in a CG physical uplink shared channel resource.
The apparatus of claim 76, wherein the signal indicates COT sharing information associated with the COT.
The apparatus of claim 85, wherein the signal indicates the COT sharing information based at least in part on a set of sounding reference signal resources used for the signal.
The apparatus of claim 85, wherein an energy detection threshold associated with COT resource sharing is configured, and wherein the COT sharing information includes information indicating at least one of:

a number of slots where a downlink transmission can be assumed within the COT,

an offset associated with the number of slots, or

that COT resource sharing is not available.
The apparatus of claim 87, further comprising:

means for receiving, from a base station, the downlink transmission in one or more resources indicated by the COT sharing information.
The apparatus of claim 85, wherein an energy detection threshold associated with COT resource sharing is not configured, and wherein the COT sharing information includes information indicating whether COT resource sharing is available.
The apparatus of claim 89, further comprising:

means for receiving, from a base station, a downlink transmission in one or more resources based at least in part on an offset from a resource used to transmit the signal.
The apparatus of claim 90, wherein the downlink transmission is received starting at an end of a slot that includes the resource used to transmit the signal.
The apparatus of claim 90, wherein the downlink transmission is associated with a maximum duration or a transmission type limitation.
The apparatus of claim 76, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including a particular sounding reference signal.
The apparatus of claim 76, wherein the signal indicates the COT sharing information associated with the COT based at least in part on the signal including all configured sounding reference signals in the COT.
The apparatus of claim 76, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicates whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The apparatus of claim 95, further comprising:

means for performing the data transmission using a modulation and coding scheme associated with the second priority level.
The apparatus of claim 76, wherein the signal includes a set of sounding reference signals (SRSs) , and wherein the set of SRSs indicate a modulation and coding scheme associated with the data transmission.
An apparatus for wireless communication, comprising:

means for performing channel acquisition to acquire a channel occupancy time (COT) ; and

means for transmitting a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate whether a configured grant associated with the COT and associated with a first priority level is used for a data transmission with a second priority level.
The apparatus of claim 98, further comprising:

means for performing the data transmission using a modulation and coding scheme associated with the second priority level.
An apparatus for wireless communication, comprising:

means for performing channel acquisition to acquire a channel occupancy time (COT) ; and

means for transmitting a signal that includes a set of sounding reference signals (SRSs) , wherein the set of SRSs indicate a modulation and coding scheme associated with a data transmission; and

means for performing the data transmission in the COT based at least in part on the modulation and coding scheme.