Permission assisted sidelink access using indication of multiple data channels

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) can transmit, to a second UE via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE. The UE can use the plurality of data channels to attempt the one or more sidelink communications between the first UE and the second UE. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This Patent Application claims priority to U.S. Provisional Patent Application No. 62 / 705,818, filed on July 16, 2020, entitled “LICENSED ASSISTED SIDELINK ACCESS USING AN INDICATION OF MULTIPLE DATA CHANNELS,” and U.S. Nonprovisional Patent Application No. 17 / 344,423, filed on June 10, 2021, entitled “LICENSED ASSISTED SIDELINK ACCESS USING AN INDICATION OF MULTIPLE DATA CHANNELS,” which are hereby expressly incorporated by reference herein. TECHNICAL FIELD

[0003] Aspects of the disclosure relate generally to wireless communication and to techniques and apparatuses for licensed assisted sidelink access using an indication of multiple data channels. BACKGROUND

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems can employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3 GPP).

[0005] A wireless network can include a number of base stations (BSs) that can support communication for a number of user equipment (UEs). A UE can communicate with a BS via the downlink and uplink. “Downlink” (or “forward link”) refers to the communication link from the BS to the UE, and “uplink” (or “reverse link”) refers to the communication link from the UE to the BS. As will be described in more detail

[0006] The above multiple access technologies have been adopted in various telecommunication standards to provide common protocols to communicate between user equipment (UE) and base stations, e.g., LTE mobile standard promulgated by the 3GPP. NR, which can also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 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 OFDM with a cyclic prefix (CP) (CP-OFDM) in the downlink (DL), using CP- OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM)) in the uplink (UL), as well as promoting SUMMARY

[0007] In some aspects, a method of wireless communication performed by a first user equipment (UE) includes transmitting, to a second UE, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE via a sidelink subchannel of a licensed carrier; and attempting the one or more sidelink communications between the first UE and the second UE using the plurality of data channels.

[0008] In some aspects, a method of wireless communication performed by a second UE includes receiving, from a first UE, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the second UE and the first UE via a sidelink subchannel of a licensed carrier; and attempting the one or more sidelink communications between the second UE and the first UE using the plurality of data channels.

[0009] In some aspects, a first 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: transmit, to a second UE, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE via a sidelink subchannel of a licensed carrier; and attempt the one or more sidelink communications between the first UE and the second UE using the plurality of data channels.

[0010] In some aspects, a second 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: receive, from a first UE via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the second UE and the first UE; and attempt the one or more sidelink communications between the second UE and the first UE using the plurality of data channels.

[0011] 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 first UE, cause the first UE to: transmit, to a second UE via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE; and attempt the one or more sidelink communications between the first UE and the second UE using the plurality of data channels.

[0012] 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 second UE, cause the second UE to: receive, from a first UE via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the second UE and the first UE; and attempt the one or more sidelink communications between the second UE and the first UE using the plurality of data channels.

[0013] In some aspects, a first apparatus for wireless communication includes means for transmitting, to a second apparatus via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first apparatus and the second apparatus; and means for attempting the one or more sidelink communications between the first apparatus and the second apparatus using the plurality of data channels.

[0014] In some aspects, a first apparatus for wireless communication includes means for receiving, from a first apparatus via a sidelink subchannel of a licensed carrier, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the second apparatus and the first apparatus; and means for attempting the one or more sidelink communications between the second apparatus and the first apparatus using the plurality of data channels.

[0015] Generally, aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems, as substantially described herein with reference to and as illustrated by the accompanying drawings, specification, and annexure.

[0016] 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 can be better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be readily utilized as bases for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions are not to be

[0017] While aspects are described in this application by illustration to some examples, those skilled in the art will understand that such aspects can be practiced in many and various ways. Different platform type, devices, systems, shape, size, and / or packaging arrangements can be used to implement the innovations described herein. For example, some aspects can be implemented via integrated chip embodiments and other non-module component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial devices, retail / purchasing devices, medical devices, or artificial intelligence enabled devices). The aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating the described aspects and features can include additional components and features for implementation and practice of the claimed and described aspects. For example, transmission and reception of wireless signals can include numerous components (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers) for analog and digital purposes. The innovations described herein are intended to be implemented in a variety of devices, chip-level components, systems, distributed arrangements, or end-user devices having different sizes, shapes, and configurations. BRIEF DESCRIPTION OF DRAWINGS

[0018] So that the manner in which the above recited features of the present disclosure can be understood in detail, a brief description of various aspects can be had below, some of which are illustrated in the 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 can admit to other equally effective aspects. Like reference numerals can be used to identify like elements throughout the several views.

[0019] Figure 1 FIG. 1 is a diagram illustrating aspects of a wireless network in accordance with the present disclosure.

[0020] Figure 2 FIG. 2 is a diagram illustrating aspects of a base station in communication with a user equipment (UE) in a wireless network in accordance with the present disclosure.

[0021] Figure 3 FIG. 3 is a diagram illustrating aspects of sidelink communication in accordance with the present disclosure.

[0022] Figure 4 FIG. 4 is a diagram illustrating aspects of sidelink communication and access link communication in accordance with the present disclosure.

[0023] Figure 5 FIG. 5 is a diagram illustrating aspects of carrier aggregation in accordance with the present disclosure.

[0024] Figure 6 FIG. 6 is a diagram illustrating aspects of sidelink access with licensed and unlicensed carriers in accordance with the present disclosure.

[0025] Figure 7 FIG. 7 is a diagram illustrating aspects associated with licensed-assisted sidelink access using indications of multiple data channels in accordance with the present disclosure.

[0026] Figure 8 FIG. 8 is a diagram illustrating aspects associated with licensed-assisted sidelink access using indications of multiple data channels with listen-before-talk (LBT) in accordance with the present disclosure.

[0027] Figure 9 FIG. 9 is a diagram illustrating aspects associated with licensed-assisted sidelink access using indications of multiple data channels with direction indications and direction switching in accordance with the present disclosure.

[0028] Figure 10 FIG. 10 is a diagram illustrating aspects associated with licensed-assisted sidelink access using indications of multiple data channels with mapping in accordance with the present disclosure.

[0029] Figure 11is a diagram illustrating aspects associated with licensed-assisted sidelink access using an indication of multiple data channels with quality of service (QoS), in accordance with the present disclosure.

[0030] Figures 12-13 is a diagram illustrating an aspect procedure associated with licensed-assisted sidelink access using an indication of multiple data channels, in accordance with the present disclosure. DETAILED DESCRIPTION

[0031] Various aspects of the disclosure are now described with reference to the drawings. However, the disclosure can be embodied in many different forms and should not be construed as limited to the particular structures or functions 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 in combination with any other aspect of the disclosure. For example, an apparatus can be implemented or a method can 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, in combination, features

[0032] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends on the particular application and design constraints imposed on the overall system.

[0033] It should be noted that while aspects can 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).

[0034] Figure 1is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 can be or include elements of a 5G (NR) network and / or an LTE network among other examples. The wireless network 100 can include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities. A base station (BS) is an entity that communicates with user equipment (UEs) and can 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 can 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 the coverage area, depending on the context in which the term is used.

[0035] BSs can provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., several kilometers in radius) and can allow unrestricted access by UEs with service subscriptions appropriate for the Figure 1 macro cell. A pico cell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions appropriate for the pico cell. A femto cell can cover a relatively small geographic area (e.g., a home) and can allow restricted access by UEs with service subscriptions appropriate for the femto cell. A BS for a macro cell can be referred to as a macro BS. A BS for a pico cell can be referred to as a pico BS. A BS for a femto cell can be referred to as a femto BS or a home BS. In the example shown in FIG. 1, a BS can be referred to as a gNB, which can operate in mmW frequencies and / or near mmW frequencies. A gNB can operate in a mmW or near mmW cellular network.

[0036] In some aspects, a cell can not necessarily be stationary, and the geographic area of the cell can move according to the location of a mobile BS. In some aspects, a BS can be interconnected with other BSs or network nodes (not shown) in the wireless network 100 using any suitable transmission network, such as a direct physical connection or a virtual network.

[0037] Wireless network 100 can 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 can also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in Figure 1, relay BS 1 lOd can communicate with macro BS 110a and UE 120d in order to facilitate communication between the BS 110a and UE 120d. A relay BS can also be referred to as a relay station, a relay base station, a repeater, etc.

[0038] Wireless network 100 can be a heterogeneous network that includes BSs of different types, such as macro BSs, pico BSs, femto BSs, relay BSs, etc. These different types of BSs can have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100. For example, macro BSs can have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs can have lower transmit power levels (e.g., 0.1 to 2 Watts).

[0039] A network controller 130 can couple to a set of BSs and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via a backhaul. The BSs can also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.

[0040] UEs 120 (e.g., 120a, 120b, 120c) can be dispersed throughout wireless network 100, and each UE can be stationary or mobile. A UE can also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, etc. A UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.

[0041] Some UEs can be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. MTC and eMTC UEs include, e.g., robots, drones, remote devices, sensors, meters, monitors, and / or location tags, that can communicate with a base station, another device (e.g., remote device), or some other entity. A wireless node can 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 can be considered Intemet-of-Things (IoT) devices, and / or can be implemented as NB-IoT (narrowband internet of things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included inside a housing that houses components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and the memory components can be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0042] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a particular RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, an air interface, and / or the like. Frequencies can also be referred to as carriers, frequency channels, and / or the like. Each frequency can 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 can be deployed.

[0043] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) can communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate with one another). For example, UE 120 can perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110. FIG. 2 shows a diagram of a wireless communications device that can be employed with one or more embodiments of the disclosure.

[0044] Devices of wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided, based on frequency or wavelength, into various classes, bands, channels, and so on. For example, devices of wireless network 100 can communicate using an operating band having a first frequency range (FR1), which can span, for example, from 410 MHz to 7.125 GHz, and / or can communicate using an operating band having a second frequency range (FR2), which can span, for example, 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, which the International Telecommunications Union (ITU) has identified as spanning from 30 GHz to 300 GHz. Thus, unless specifically stated otherwise, the term “sub-6 GHz” or like terminology, if used herein, can 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, the term “millimeter wave” or like terminology, if used herein, can 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 can be modified, and techniques described herein are applicable to those modified frequency ranges.

[0045] As indicated above, Figure 1 are provided by way of example. Other examples can differ from those described with respect to at least the following examples. Figure 1

[0046] Figure 2 is a diagram illustrating an example of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure. The base station 110 can be equipped with T antennas 234a through 234t, and the UE 120 can be equipped with R antennas 252a through 252r, where generally T > 1 and R > 1.

[0047] ​At base station 110, a transmit processor 220 can 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 selected for the UE, and provide data symbols for all UEs. Transmit processor 220 can also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling) and provide overhead symbols and control symbols. Transmit processor 220 can also generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS)) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS)). A transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and can provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 can process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232t can be transmitted via T antennas 234a through 234t, respectively.

[0048] At the UE 120, the antennas 252a-252r can receive the downlink signals from the base station 110 and / or other base stations and can provide received signals to the demodulators (DEMODs) 254a-254r, respectively. Each demodulator 254 can condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 can further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all R demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. A receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The term “controller / processor” can refer to one or more controllers, one or more processors, or a combination thereof. A channel processor can determine reference signal received power (RSRP) parameters, received signal strength indicator (RSSI) parameters, reference signal receiving quality (RSRQ) parameters, and / or CQI parameters, among other examples. In some aspects, one or more components of UE 120 can be included in a housing 284.

[0049] The network controller 130 can include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 can include, for example, one or more devices in a core network. The network controller 130 can communicate with the base station 110 via the communication unit 294.

[0050] Antennas (e.g., antennas 234a-234t and / or antennas 252a-252r) can include or be included within one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, among other examples. An antenna panel, antenna group, antenna element set, and / or antenna array can include one or more antenna elements. An antenna panel, antenna group, antenna element set, and / or antenna array can include a set of co-planar antenna elements and / or a set of non-co-planar antenna elements. An antenna panel, antenna group, antenna element set, and / or antenna array can include antenna elements within a single housing and / or antenna elements within multiple housings. An antenna panel, antenna group, antenna element set, and / or antenna array can include one or more antenna elements coupled to one or more transmit and / or receive components, such as one or more components of 2.

[0051] On the uplink, at UE 120, a transmit processor 264 can receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from controller / processor 280. Transmit processor 264 can also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 can be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, a modulator and a demodulator (e.g., MOD / DEMOD 254) of the UE 120 can be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver can include any combination of antennas 252, modulators and / or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver can be used by a processor (e.g., controller / processor 280) and memory 282 to perform any of the methods described herein, for example, as described with reference to FIGs. 1-2. Figures 12-13 are described.

[0052] At base station 110, the uplink signals from UE 120 and other UEs can 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 can provide the decoded data to a data sink 239 and the decoded control information to controller / processor 240. Base station 110 can include communication unit 244 and communicate to network controller 130 via communication unit 244. Base station 110 can include a scheduler 246 to schedule UEs 120 for downlink and / or uplink communications. In some aspects, a modulator and a demodulator (e.g., MOD / DEMOD 232) of the base station 110 can be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver can include any combination of antennas 234, modulators and / or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver can be used by a processor (e.g., controller / processor 240) and memory 242 to perform any of the methods described herein, for example, as described with reference to FIGs. 1-2. Figures 12-13 are described.

[0053] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other component may perform one or more techniques associated with licensed auxiliary-side walkway access using indications of multiple data channels, as described in more detail elsewhere herein. In some aspects, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component may perform or direct in some way. Figure 12 Process 1200 Figure 13 The operation of process 1300 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. In some aspects, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or instruct in some aspects. Figure 12 Process 1200 Figure 13 The operation of process 1300 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions, and / or interpretation instructions.

[0054] In some aspects, UE 120 may include: a unit for transmitting to a second UE via a sidelink subchannel of a licensed carrier an indication of multiple data channels of an unlicensed carrier to be used for attempting one or more sidelink communications between the first UE and the second UE; and / or a unit for using the multiple data channels to attempt one or more sidelink communications between the first UE and the second UE. Alternatively or additionally, UE 120 may include: a unit for receiving from the first UE via a sidelink subchannel of a licensed carrier an indication of multiple data channels of an unlicensed carrier to be used for attempting one or more sidelink communications between the second UE and the first UE; and / or a unit for using the multiple data channels to attempt one or more sidelink communications between the second UE and the first UE. In some aspects, such a unit may include a combination of... Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TXMIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0055] Although Figure 2 The blocks in FIG. 13 are illustrated as distinct components, but the functionality described above with respect to these blocks can be implemented in a single hardware, software, or combined component or in various combinations of components. In some aspects, the functionality described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by controller / processor 280 or under its control.

[0056] As indicated above, Figure 2 is provided as one aspect. Other aspects can vary from the aspects described with respect to Figure 2 .

[0057] Figure 3 is a diagram illustrating an aspect 300 of sidelink communications, in accordance with the present disclosure.

[0058] As Figure 3 indicated, a first UE 305-1 can communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (which can include V2V communications, V2I communications, and / or vehicle-to-pedestrian (V2P) communications, for example), mesh networks, and / or the like. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally, or alternatively, the UEs 305 can synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, and / or symbols) using global navigation satellite system (GNSS) timing.

[0059] As Figure 3Further shown, one or more sidelink channels 310 can include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a physical sidelink feedback channel (PSFCH) 325. Similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with base stations 110 via an access link or access channel, the PSCCH 315 can be used to convey control information. Similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communications with base stations 110 via an access link or access channel, the PSSCH 320 can be used to convey data. In some aspects, the PSCCH 315 can carry sidelink control information (SCI) 330, which can indicate various control information for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) in which a transport block (TB) 335 can be carried on the PSSCH 320. The TB 335 can include data. The PSFCH 325 can be used to convey sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and / or scheduling requests (SRs).

[0060] In some aspects, one or more of the sidelink channels 310 can use a resource pool. In some aspects, a scheduling assignment (e.g., included in the SCI 330) can be transmitted in a subchannel using a particular resource block (RB) across time. In some aspects, a data transmission (e.g., on the PSSCH 320) associated with the scheduling assignment can occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, the scheduling assignment and associated data transmission are not transmitted on adjacent RBs.

[0061] In some aspects, the UE 305 can operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than a base station 110). In some aspects, the UE 305 can perform resource selection and / or scheduling by sensing channel availability for transmissions. In some aspects, the UE 305 can measure an RSSI parameter (e.g., a sidelink RSSI (S-RSSI) parameter) associated with various sidelink channels, can measure an RSRP parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, can measure an RSRQ parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and can select a channel for a transmission of a sidelink communication based at least in part on the measurements.

[0062] Additionally or alternatively, the UE 305 can perform resource selection and / or scheduling using SCI 330 received in the PSCCH 315, which can indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 can perform resource selection and / or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which can be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 can use for a particular set of subframes).

[0063] In transmission modes in which resource selection and / or scheduling is performed by the UE 305, the UE 305 can generate a sidelink grant and can transmit the grant in SCI 330. In some aspects, the sidelink grant can indicate one or more parameters (e.g., transmission parameters) for an upcoming sidelink transmission, such as one or more resource blocks to be used for the upcoming sidelink transmission (e.g., for a TB 335), one or more subframes to be used for the upcoming sidelink transmission, and / or an MCS to be used for the upcoming sidelink transmission. In some aspects, the UE 305 can generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as a periodicity of sidelink transmissions. Additionally or alternatively, the UE 305 can generate a sidelink grant for event-driven scheduling (e.g., for on-demand sidelink messages).

[0064] As indicated above, Figure 3 is provided as one aspect. Other aspects can vary from the aspects described in relation to Figure 3 .

[0065] Figure 4 is a diagram illustrating an aspect 400 of sidelink communications and access link communications, in accordance with the present disclosure.

[0066] As Figure 4 illustrated, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 can communicate with one another via a sidelink, as described above in connection with Figure 3 . As further illustrated, in some sidelink modes, a base station 110 can communicate with the Tx / Rx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, the base station 110 can communicate with the Rx / Tx UE 410 via a second access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 can correspond to one or more UEs described elsewhere herein, such as the UE 305. Figure 1A direct link between UEs 120 (e.g., via a PC5 interface) can be referred to as a sidelink, and a direct link between a base station 110 and a UE 120 (e.g., via a Uu interface) can be referred to as an access link. Sidelink communications can be transmitted via a sidelink, and access link communications can be transmitted via an access link. Access link communications can be downlink communications (e.g., from a base station 110 to a UE 120) or uplink communications (e.g., from a UE 120 to a base station 110).

[0067] As indicated above, Figure 4 is provided as one aspect. Other aspects can vary from the aspects described in relation to Figure 4 .

[0068] Figure 5 is a diagram illustrating aspects 500 of carrier aggregation, in accordance with the present disclosure.

[0069] Carrier aggregation is a technique that enables two or more component carriers (CCs, sometimes referred to as carriers) for a single UE 120 to be combined (e.g., into a single channel) to enhance data capacity. As shown, the carriers can be combined in the same or different frequency bands. Additionally or alternatively, the carriers can be continuous or non-continuous. A base station 110 can configure a UE 120 with carrier aggregation, for example, in a radio resource control (RRC) message or in downlink control information (DCI).

[0070] As shown by reference number 505, in some aspects, carrier aggregation can be configured in an intra-band contiguous mode, in which the aggregated carriers are contiguous with each other and in the same frequency band. As shown by reference number 510, in some aspects, carrier aggregation can be configured in an intra-band non-contiguous mode, in which the aggregated carriers are non-contiguous with each other and in the same frequency band. As shown by reference number 515, in some aspects, carrier aggregation can be configured in an inter-band non-contiguous mode, in which the aggregated carriers are non-contiguous with each other and in different frequency bands.

[0071] In carrier aggregation, a UE 120 can be configured with a primary carrier and one or more secondary carriers. In some aspects, the primary carrier can carry control information (e.g., downlink control information and / or scheduling information) for scheduling data communications on the one or more secondary carriers, which can be referred to as cross-carrier scheduling. In some aspects, a carrier (e.g., a primary carrier or a secondary carrier) can carry control information for scheduling data communications on the carrier, which can be referred to as self-carrier scheduling or carrier self-scheduling.

[0072] As indicated above, Figure 5 is provided as one aspect. Other aspects can vary from the aspects described in relation to Figure 5Aspects are described.

[0073] Figure 6 is a diagram illustrating aspects 600 of sidelink access with licensed carrier 605 and unlicensed carrier 610, in accordance with the present disclosure. As shown, UEs 615 (e.g., UE 615-1, UE 615-2, UE 615-3, and / or UE 615-4) can communicate with each other via sidelink communications (also referred to as sidelink access or simply sidelink) at various times using licensed carrier 605. Such sidelink communications can occur in the presence of unlicensed carrier 610, which can coexist with other RATs. In some aspects, one of the RATs that can be present in unlicensed carrier 610 is a WiFi network, and the WiFi network can have devices operating in unlicensed carrier 610, e.g., WiFi devices 620. Figure 6

[0074] At various times, certain UE devices can be communicating with each other via sidelink. In some aspects, during a given time as shown, UE 615-1 can be in sidelink communication with UE 615-2, and UE 615-3 can be in sidelink communication with UE 615-4. Such sidelink communications can occur without involving a base station. For example, such UEs can be in a radio resource allocation (RRA) mode 2 sidelink communication that allows for independent deployment of UEs, where the UEs can sense to occupy and reserve channel access (as opposed to RRA mode 1 sidelink communication, in which network control is used and the UEs receive a grant for channel access, e.g., from a gNB).

[0075] Efficiently performing access to licensed spectrum (e.g., licensed carrier 605) for scheduling of such sidelink communications between devices. Currently, sidelink is mainly used in the V2X domain. As sidelink use cases grow in verticals other than the V2X domain, the growing amount of data transmissions will put an increasing burden on the licensed spectrum. Offloading data to unlicensed spectrum (e.g., unlicensed carrier 610) is seen as one way to address the data bandwidth limitations of the licensed spectrum. However, scheduling access to unlicensed spectrum for sidelink communications is not as efficient as scheduling access to licensed spectrum for sidelink communications. The terms licensed spectrum, licensed frequency band, and multiple licensed frequency bands can be used interchangeably. Likewise, the terms unlicensed spectrum, unlicensed frequency band, and multiple unlicensed frequency bands can be used interchangeably.

[0076] ​Some techniques and apparatuses described herein can improve access to unlicensed spectrum for sidelink communications by using an indication via a licensed spectrum of a plurality of data channels for sidelink via unlicensed spectrum. Some techniques and apparatuses described herein can use a load-based equipment (LBE) technique to determine such access to unlicensed spectrum (as opposed to a frame-based equipment (FBE) technique). LBE is a listen-before-talk (LBT) technique. LBT generally allows communications of devices to coexist on data channels without prior coordination. LBE is an LBT technique that allows devices to sense availability of data channels at any time (as opposed to FBE, which is an LBT technique in which devices can sense availability of data channels at predetermined times). Thus, by using an indication via a licensed spectrum of a plurality of data channels for sidelink communications via unlicensed spectrum, increased spectrum can be efficiently available for sidelink access by UEs with greater robustness. By using an LBE technique for data channel access to unlicensed spectrum, complexity and / or overhead associated with more stringent synchronization and / or timing can be avoided. Power saving benefits in channel access can be realized on unlicensed carriers, e.g., by limiting the need to sense.

[0077] As indicated above, Figure 6 is provided as one aspect. Other aspects can differ from that described with respect to Figure 6 the aspects described herein.

[0078] Figure 7 is a diagram illustrating aspects 700 associated with licensed-assisted sidelink access using an indication of a plurality of data channels, in accordance with the present disclosure. As Figure 7 indicated, a first UE can transmit to a second UE via a sidelink subchannel (e.g., subchannel 715-1) of a licensed carrier 705. The first and / or second UE can correspond to one or more other UEs described elsewhere herein, such as UE 120. The sidelink subchannel can provide sidelink communications between UEs as described elsewhere herein, such as with respect to sidelink access of UEs 305-1 and 305-2. The licensed carrier 705 can include a licensed spectrum and / or licensed band as described elsewhere herein, such as licensed carrier 605.

[0079] The first UE can transmit, to the second UE, an indication of a plurality of data channels 720 (e.g., channel 720-1, channel 720-2, channel 720-3, and / or channel 720-4) of the unlicensed carrier 710. Such a plurality of data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The plurality of data channels 720 can include PSSCHs, such as the PSSCHs 320 described elsewhere herein. In some aspects, the unlicensed carrier 710 can include an unlicensed spectrum and / or unlicensed band, such as the unlicensed carrier 610, as described elsewhere herein. One or more of the plurality of data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The plurality of data channels 720 can be contiguous in time, back-to-back, or share a common boundary. By making the plurality of data channels 720 contiguous, an overall latency can be minimized.

[0080] When attempting a sidelink communication, a UE (e.g., the first UE or the second UE) can perform an LBT procedure to determine availability of a data channel, and transmit via the data channel if the data channel is available, or perform another LBT procedure on another data channel if the data channel is not available. When attempting a sidelink communication, a UE (e.g., the first UE or the second UE) can monitor for communications on a data channel, and decode such communications if found. To monitor for communications, the UE can perform blind decoding in cases where SCI can not be available.

[0081] The licensed carrier 705 can be used for quality of service (QoS) sensitive data and / or control, while the unlicensed carrier 710 can be opportunistically used to provide a greater data transfer pipe, which can include relaxed QoS. In this way, a licensed assisted QoS and / or congestion control for channel access can be provided on the unlicensed carrier.

[0082] The indication transmitted from the first UE to the second UE can identify one or more resources of the licensed carrier 705 to be used for HARQ feedback 725 corresponding to the plurality of data channels 720 of the unlicensed carrier 710. Providing the HARQ feedback 725 via the licensed carrier 705 (as opposed to the unlicensed carrier 710) can provide improved reliability. With the HARQ feedback 725 provided over the licensed carrier 705 (as opposed to the unlicensed carrier 710), highly reliable control signaling can be provided.

[0083] Indications sent from the first UE to the second UE may include one or more transmission parameters for a corresponding data channel among the multiple data channels 720. The one or more transmission parameters may include one or more carrier frequency indicators (CFI), one or more bandwidth portion (BWP) indicators, one or more transmission configuration indicator (TCI) states, one or more time domain resource allocations (TDRA), one or more frequency domain resource allocations (FDRA), one or more MCS, one or more HARQ parameters, one or more sounding reference signal resource indicators (SRI), or combinations thereof, for the multiple data channels 720. HARQ parameters may include one or more New Data Indicator (NDI) parameters and / or one or more Redundancy Version (RV) parameters. NDI parameters may be used to determine the transmission of new data. RV parameters may be used to determine transmission characteristics.

[0084] like Figure 7 As shown, in some aspects, multiple data channels 720 can be grouped into one or more groups (e.g., group 1 and / or group 2). One or more data channels included in the same group (e.g., PSSCH0 and PSSCH1 in group 1, and / or PSSCH2 and PSSCH3 in group 2) can be associated with one or more common transmission parameters for that group, such as one or more transmission parameters listed above. Configuring data channels included in the same group using common transmission parameters can save signaling overhead and / or bandwidth associated with indicating the transmission parameters used for the data channels.

[0085] Data channels in multiple data channels 720 can occupy time slots. For example... Figure 7 As shown, such time slots can have a longer duration (e.g., PSSCH2 is a time slot with a longer duration in group 2) or a shorter duration (e.g., PSSCH0 is a time slot with a shorter duration in group 1). Time slots with shorter durations can be referred to as mini-time slots. Multiple data channels 720 can begin with one or more mini-time slots occupying mini-time slots in group 1, such as PSSCH0 and PSSCH1. Providing such mini-time slots at the beginning of a sequence of multiple data channels 720 can reduce latency, for example, in cases where an initial LBT process cannot access a data channel due to congestion and / or interference and another LBT process will be attempted. In this way, mini-time slots can provide multiple opportunities to gain access to the data channel, which can reduce latency in link communication.

[0086] In some aspects, the indication sent from the first UE to the second UE may be included in the SCI, the Media Access Control (MAC) Control Element (CE) (MAC-CE), the Radio Resource Control Configuration Message, or a combination thereof. For the SCI, the indication may be included in a new SCI (such as Phase 2 side Link Control Information (SCI-2)).

[0087] Ensuring the validity of sidelink communication can help avoid unwanted communication. Once the handshake process is complete, it can be determined that the indication sent from the first UE to the second UE is valid. In some aspects, such as in MAC-CE or other upper-layer communication, a two-way handshake can be used to increase reliability in determining the validity of communication. To obtain even greater reliability in determining the validity of communication, a three-way handshake can be used. The validity of the indication can be determined at least in part based on the handshake process, in which case the second UE (receiver) can use the indication. This indication can be used to schedule periodic communication, similar to a configured authorization.

[0088] To allow the second UE (receiver) time to access the unlicensed carrier 710, a delay or time gap can be added after the first UE (transmitter) transmits the indication but before multiple data channels 720 exist on the unlicensed carrier 710. The indication sent from the first UE to the second UE and the initial data channels of the multiple data channels 720 can be separated by a non-zero time gap (such as...). Figure 7 (As indicated by "T" in the diagram). A time gap T may exist to provide a predetermined delay between the end of the transmission indication time slot and the start of the first data channel among the plurality of data channels 720.

[0089] The indication sent from the first UE to the second UE can indicate that one or more of the multiple data channels 720 will be used to transmit SCI. To allow other UEs to read and avoid conflicts with sidelink communication, and to better coexist on the unlicensed carrier 710, the first UE can transmit phase-one sidelink control information (SCI-1) on the multiple data channels 720. In some aspects, SCI-1 can appear in any time slot of the multiple data channels 720; SCI-1 can appear once in any given time slot; and / or SCI-1 can appear at the beginning of the multiple data channels 720, e.g., the initial time slot. Transmitting SCI-1 on the multiple data channels 720 using the unlicensed carrier 710 can provide an indication of resource occupancy on the unlicensed carrier 710, allowing another independent sidelink system to read and avoid conflicts. A predetermined bit can be assigned to instruct the sidelink transmitter to insert SCI-1 into one of the data channels in the sequence. This predetermined bit can be used by the independent sidelink UE to determine resource occupancy.

[0090] The second UE can receive, from the first UE via a sidelink subchannel (e.g., subchannel 715-1) of the licensed carrier 705, an indication of multiple data channels 720 (e.g., channel 720-1, channel 720-2, channel 720-3, and / or channel 720-4) of the unlicensed carrier 710. Such an indication can be used to attempt one or more sidelink communications between the second UE and the first UE. One or more of the multiple data channels 720 can be used to attempt the one or more sidelink communications between the second UE and the first UE.

[0091] As described above, licensed-assisted sidelink access can be performed using an indication of multiple data channels on an unlicensed carrier. In this way, the robustness of sidelink communications can be improved by better allowing communications of other radio access technologies, such as WiFi communications, to coexist with sidelink communications on unlicensed spectrum.

[0092] As noted above, Figure 7 is provided as an aspect. Other aspects can vary from the aspects Figure 7 described with respect to

[0093] Figure 8 is a diagram illustrating aspects 800 associated with licensed-assisted sidelink access using an indication of multiple data channels with LBT, in accordance with the present disclosure. As Figure 8 indicated, a first UE can transmit to a second UE via a sidelink subchannel (e.g., subchannel 715-1) of a licensed carrier 705. The first and / or second UE can correspond to one or more other UEs described elsewhere herein, such as UE 120. The sidelink subchannel can provide for sidelink communications between UEs as described elsewhere herein, such as the sidelink access described with respect to UEs 305-1 and 305-2. The licensed carrier 705 can include a licensed spectrum and / or licensed band as described elsewhere herein, such as licensed carrier 605.

[0094] The first UE can transmit, to the second UE, an indication of multiple data channels 720 of an unlicensed carrier 710. Such multiple data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The multiple data channels 720 can include PSSCHs, such as PSSCH 320 described elsewhere herein. In some aspects, the unlicensed carrier 710 can include an unlicensed spectrum and / or unlicensed band as described elsewhere herein, such as unlicensed carrier 610. One or more of the multiple data channels 720 can be used to attempt the one or more sidelink communications between the first UE and the second UE.

[0095] As described above with respect toFigure 7 As described, LBT typically allows communication between devices to coexist on data channels without prior coordination by determining the availability of a data channel and, if available, transmitting via such a data channel (or performing another LBT procedure on another data channel if unavailable). A first UE (transmitter) can perform an LBT procedure to determine the availability of a data channel and, at least in part, selectively transmit sidelink communication to a second UE (receiver) using the data channel based on the determined availability. To improve sidelink communication between the first UE and the second UE, one or more LBT procedures can be performed by combining data channels from multiple data channels 720.

[0096] like Figure 8 As shown, the first UE (transmitter) may perform one or more LBT procedures 830 (e.g., LBT procedure 830-1, LBT procedure 83-2, LBT procedure 830-3, and / or LBT procedure 830-4) before transmitting on a data channel. Specifically, before the first UE attempts to transmit sidelink communication on a given data channel among multiple data channels (such as multiple data channels 720), the first UE may perform LBT procedure 830 for that given data channel. If the first UE determines, for example, that the data channel is available based at least in part on sensing during the LBT procedure, the first UE may selectively transmit sidelink communication via the data channel. If the first UE cannot determine that the data channel is available based at least in part on sensing during the LBT procedure, the first UE may perform a subsequent LBT procedure for the next data channel among the multiple data channels. The first UE may then perform LBT procedure 830 on the next data channel in a similar manner to the previous data channel, repeating the process to determine the availability of the data channel.

[0097] like Figure 8 As shown, a first UE may perform a first LBT procedure 830-1 for a first data channel (e.g., PSSCH0) among multiple data channels to attempt sidelink communication. If the first UE can determine the availability of the first data channel via the first LBT procedure 830-1, the first UE may selectively transmit sidelink communication to a second UE (receiver) via the first data channel (e.g., PSSCH0). If the first UE cannot determine the availability of the data channel via the first LBT procedure 830-1, the first UE may perform a second LBT procedure 830-2 for a second data channel (e.g., PSSCH1) among multiple data channels in a similar manner to the previous data channel, repeating the process to determine the availability of the data channel.

[0098] To improve error handling, the first UE can use a cyclic prefix (CP) extension when performing the first LBT procedure 830-1. By using the CP extension, the first UE can occupy the data channel earlier, e.g., up to one OFDM symbol before a designated starting point of the first data channel. The first UE can then communicate using the data channel (e.g., PSSCH) based at least in part on the indicated TDRA that can be specified for the data channel.

[0099] While a transmitting UE can perform an LBT procedure before attempting a sidelink communication, a receiving UE can perform blind decoding for a data channel used for receiving a sidelink communication. As discussed above with respect to Figure 7 SCI can not be available for blind decoding. Based at least in part on the indication from the first UE, the second UE (receiver) can attempt to receive a sidelink communication from the first UE (transmitter) without SCI.

[0100] To further improve decoding, the second UE (receiver) can monitor a reference signal, e.g., a DMRS sequence, according to a given threshold. The second UE can use the threshold to monitor the reference signal at a predetermined port for the sidelink communication to initiate decoding of the data channel. For an earlier data channel, e.g., before a first cyclic redundancy check (CRC) procedure is completed, the threshold can be relatively lower (more stringent). For a later data channel, e.g., after the first CRC procedure is completed, the threshold can be relatively higher (relaxed). For the CRC procedure, the second UE (receiver) can receive a HARQ response (acknowledgement (ACK) and / or negative acknowledgement (NACK)) that reflects a result of the CRC procedure.

[0101] As noted above, Figure 8 is provided as one aspect. Other aspects can differ from that described with respect to Figure 8 the aspects described with respect to

[0102] Figure 9 is a diagram illustrating aspects 900 associated with using an indication of a plurality of data channels with direction indication and direction switching for licensed-assisted sidelink access, in accordance with the present disclosure. As shown, Figure 9 the first and / or second UE can correspond to one or more other UEs described elsewhere herein, such as UE 120. The sidelink subchannel can provide for sidelink communications between UEs as described elsewhere herein, such as the sidelink access described with respect to UEs 305-1 and 305-2. The licensed carrier 705 can include a licensed spectrum and / or a licensed band as described elsewhere herein, such as the licensed carrier 605.

[0103] The first UE can transmit an indication of a plurality of data channels 720 of the unlicensed carrier 710 to the second UE. Such a plurality of data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The plurality of data channels 720 can include PSSCHs, such as the PSSCHs 320 described elsewhere herein. In some aspects, the unlicensed carrier 710 can include an unlicensed spectrum and / or unlicensed band as described elsewhere herein, such as the unlicensed carrier 610. One or more of the plurality of data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE.

[0104] To improve the flow of data between the first UE and the second UE, the plurality of data channels 720 can include one or more traffic direction indications indicating a direction of data in a given data channel of the plurality of data channels 720 (e.g., from the first UE to the second UE or from the second UE to the first UE). Such direction indications can sometimes indicate a switch in direction.

[0105] As Figure 9 indicated, the first UE can transmit a first traffic direction indication 940-1 indicating a transmission of data from the first UE to the second UE using a first and second data channel of the plurality of data channels 720 (e.g., PSSCH0 and PSSCH1 (group 1)). The first UE can transmit the first traffic direction indication 940-1 on the subchannel 715-1. The second UE can transmit a second traffic direction indication 940-2 indicating a switch in direction of traffic. The second UE can transmit the second traffic direction indication 940-2 indicating a transmission of data from the second UE to the first UE using a third and fourth data channel of the plurality of data channels 720 (e.g., PSSCH2 and PSSCH3 (group 2)). The second UE can transmit the second traffic direction indication 940-2 on the subchannel 715-2.

[0106] While Figure 9 the direction switch indicated is occurring between groups, such a direction switch can occur after any individual data channel. In some aspects, one or more direction switches can occur within a group. By allowing one or more traffic direction indications at various points with respect to a data channel, the first UE and the second UE can flexibly communicate with one another in either direction. Allowing such flexibility in communication can improve the efficiency of communications on the unlicensed carrier 710.

[0107] Although, as described above, different data channels of the plurality of data channels can be associated with different data directions, all data channels of the plurality of data channels can be associated with the same data direction, whether from the first UE to the second UE or from the second UE to the first UE. The first UE can transmit an initial traffic direction indication indicating transmission of data from the first UE to the second UE for all data channels (e.g., the plurality of data channels 720) without any subsequent traffic direction indication occurring. The second UE can transmit an initial traffic direction indication indicating transmission of data from the second UE to the first UE for all data channels (e.g., the plurality of data channels 720) without any subsequent traffic direction indication occurring.

[0108] Different parameters can also be configured during a change in traffic direction. A first set of parameters (e.g., MCS, TCI, and / or SRI) can be configured for a first data channel (e.g., PSSCH0) and / or group (e.g., group 0) associated with the first traffic direction indication 940-1. A second set of parameters (e.g., MCS, TCI, and / or SRI) can be configured for a second data channel (e.g., PSSCH2) and / or group (e.g., group 1) associated with the second traffic direction indication 940-2. In some aspects, one or more parameters of the first set of parameters have matching values to corresponding one or more parameters of the second set of parameters.

[0109] To further support direction switching, the indication of the change in traffic direction between the first UE and the second UE can be associated with an LBT procedure (e.g., LBT procedure 830) used to determine availability of a channel. The LBT procedure can be a Type 2 LBT procedure used to transmit sidelink communications in a later data channel (e.g., PSSCH1). To allow time for the UE (receiver) to respond to the change in traffic direction, a time gap (e.g., “T” as described above with respect to FIG. 8) can be associated with the LBT procedure and the change in traffic direction. To improve error handling, a CP extension (e.g., as described above with respect to FIG. 8) can be associated with the LBT procedure and the change in traffic direction. The UE can use the CP extension to occupy the channel at an earlier time than can be allowed by the OFDM symbol boundary. By providing a time gap and / or CP extension with the LBT procedure, channel sharing between UEs, e.g., channel occupancy time (COT), can be improved. Figure 8 Figure 7 Figure 7 As noted above, the LBT procedure 830 is provided as one aspect. Other aspects can differ from the aspects described with respect to FIG. 8.

[0110] As noted above, the LBT procedure 830 is provided as one aspect. Other aspects can differ from the aspects described with respect to FIG. 8. Figure 9 Figure 9 As noted above, the LBT procedure 830 is provided as one aspect. Other aspects can differ from the aspects described with respect to FIG. 8.

[0111] Figure 10 ​​​This is a diagram illustrating aspect 1000 of permitted auxiliary-side crosslink access according to this disclosure, relating to the use of instructions for multiple data channels having mappings. (See diagram for example.) Figure 10 As shown, the first UE can transmit to the second UE via a sidelink subchannel (e.g., subchannel 715-1) of licensed carrier 705. The first and / or second UE may correspond to one or more other UEs described elsewhere herein, such as UE 120. The sidelink subchannel can provide sidelink communication between UEs as described elsewhere herein, such as sidelink access as described with respect to UEs 305-1 and 305-2. Licensed carrier 705 may include licensed spectrum and / or licensed frequency bands as described elsewhere herein, such as licensed carrier 605.

[0112] The first UE can send an indication to the second UE of multiple data channels 720 on the unlicensed carrier 710. These multiple data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The multiple data channels 720 may include PSSCHs, such as PSSCH 320 described elsewhere herein. In some aspects, the unlicensed carrier 710 may include unlicensed spectrum and / or unlicensed frequency bands as described elsewhere herein, such as unlicensed carrier 610. One or more of the multiple data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE.

[0113] To manage channel access contention and / or avoid collisions on unlicensed carriers (e.g., unlicensed carrier 710), the first UE and the second UE can be mapped to a radio access window (RAW) used for accessing the unlicensed carrier. This mapping can be combined with the above. Figure 7 The description is associated with the instructions.

[0114] like Figure 10As shown, a subchannel, index-dependent RAW 1050 (first RAW 1050-1 and / or second RAW 1050-2) can be defined by an indication to access the unlicensed carrier 710. A subchannel 715-1 of the licensed carrier 705 can be mapped to a first RAW 1050-1 (occurring later in time) of the unlicensed carrier 710. A given UE, such as the first UE or the second UE, can be associated with the subchannel 715-1. A subchannel 715-2 of the licensed carrier 705 can be mapped to a second RAW 1050-2 (occurring earlier in time) of the unlicensed carrier 710. A given UE, such as the first UE or the second UE, can be associated with the subchannel 715-2. A starting data channel (e.g., PSSCH0) of the plurality of data channels can start within the second RAW 1050-2 occurring earlier in time. By mapping data channels to radio access windows occurring at different times, a license assisted collision avoidance for channel access can be provided.

[0115] In some aspects, an indication from a UE can randomly select a candidate OFDM symbol within a RAW 1050. Such a candidate OFDM can serve as a starting point (e.g., PSSCH0) of a sequence of data channels determined according to a particular subchannel on which the indication is transmitted. Such a mapping to a RAW (e.g., a mapping pattern) can sometimes change on a per-slot basis.

[0116] As described above, RAWs can occur at different times, e.g., a first RAW 1050-1 occurring later in time and / or a second RAW 1050-2 occurring earlier in time. Allowing RAWs to occur at different times can better avoid contention between subchannels 715.

[0117] To improve distribution and / or timing between start times of RAWs, a penalty factor can be defined for channel occupancy calculations between subchannels, e.g., during initial configuration. A sidelink subchannel having a first in time RAW (e.g., second RAW 1050-2) associated with the subchannel 715-2 can be associated with a channel access penalty factor that is greater than a channel access penalty factor associated with a sidelink subchannel having a second in time RAW (e.g., first RAW 1050-1) associated with the subchannel 715-1. Channel occupancy calculations can be made with the associated penalty factors to determine optimal start times of RAWs.

[0118] To improve congestion of data traffic over the unlicensed carrier 710, the first UE can provide licensed assisted congestion control. In doing so, the first UE can determine for congestion control to define the unlicensed carrier (e.g., the unlicensed carrier 710) as “separate” and “ancillary.” By “separate,” the first UE can be configured to maintain a separate channel occupancy state from the licensed carrier (e.g., the licensed carrier 705), a separate channel occupancy limit of the same channel busy ratio value, or a combination thereof. By “ancillary,” the first UE can be configured to use CBR measurements of the licensed carrier 705 to determine a channel occupancy limit of the unlicensed carrier 710. Additionally or alternatively, by “ancillary,” the first UE can be configured to indicate that a channel occupancy limit of the unlicensed carrier can be calculated based at least in part on a smaller of a first channel busy ratio estimate of the licensed carrier 705 and a second channel busy ratio estimate of the unlicensed carrier 710. By configuring the first UE to determine for congestion control to define the unlicensed carrier as “separate” and “ancillary” as such, the first UE can improve congestion of data traffic over the unlicensed carrier.

[0119] As indicated above, Figure 10 is provided as one aspect. Other aspects can vary from the aspects described in relation to Figure 10 .

[0120] Figure 11 is a diagram illustrating aspects 1100 associated with using an indication of multiple data channels with QoS for licensed assisted sidelink access, in accordance with the present disclosure. As Figure 11 indicated, a first UE can transmit to a second UE via a sidelink subchannel (e.g., subchannel 715-1) of a licensed carrier 705. The first and / or second UE can correspond to one or more other UEs described elsewhere herein, such as the UE 120. The sidelink subchannel can provide sidelink communications between UEs as described elsewhere herein, such as the sidelink access described in relation to the UEs 305-1 and 305-2. The licensed carrier 705 can include a licensed spectrum and / or licensed band as described elsewhere herein, such as the licensed carrier 605.

[0121] The first UE can send an indication to the second UE of multiple data channels 720 on the unlicensed carrier 710. These multiple data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE. The multiple data channels 720 may include PSSCHs, such as PSSCH 320 described elsewhere herein. In some aspects, the unlicensed carrier 710 may include unlicensed spectrum and / or unlicensed frequency bands as described elsewhere herein, such as unlicensed carrier 610. One or more of the multiple data channels 720 can be used to attempt one or more sidelink communications between the first UE and the second UE.

[0122] To improve performance over unlicensed carrier 710, the first UE and / or the second UE may support QoS associated with one or more sidelink communications between the first UE and the second UE. (See above regarding...) Figure 10 The discussion focuses on using multiple RAWs on an unlicensed carrier (e.g., unlicensed carrier 710) to manage channel access contention and / or avoid collisions. These RAWs can be configured to occur at different starting points, reflecting different priorities for QoS. Specifically, a first UE (transmitter) can provide QoS by starting a first RAW before a second RAW, thus prioritizing the first RAW over the second RAW.

[0123] like Figure 11 As shown, to improve QoS, different starting points can be provided to multiple RAW 1150s based on different QoS priorities. Specifically, RAW 1150-2 in the unlicensed carrier associated with sub-channel 715-2 can have an earlier starting point than RAW 1150-1 in the unlicensed carrier 710 associated with sub-channel 715-1. By prioritizing the earlier sub-channel 715-2, sub-channel 715-2 can be associated with a higher QoS priority than sub-channel 715-1.

[0124] Multiple RAW 1150 configurations can differ from each other. Compared to RAW 1150-2, RAW 1150-1 can be associated with different ranges of CP extensions and / or different numbers of mini-slots for multiple data channels (e.g., multiple data channels 720). Higher priority communications can extend the CP extension, for example, by using additional OFDM symbols, while lower priority communications may not use the CP extension at all. Alternatively, higher priority communications can extend the mini-slot channels (e.g., PSSCH), for example, up to seven mini-slot channels; while lower priority communications can have zero mini-slot channels. By allowing the RAW configurations to differ from each other, performance over the unlicensed carrier 710 can be improved.

[0125] As indicated above, Figure 11 is provided as an aspect. Other aspects can vary from the aspects described in connection with Figure 11 .

[0126] Figure 12 is a diagram illustrating an example process 1200 performed, for example, by a first UE, in accordance with the present disclosure. Example process 1200 is an example where the first UE (e.g., a UE 120) performs operations associated with licensed-assisted sidelink access using an indication of multiple data channels.

[0127] As Figure 12 further shown, in some aspects, process 1200 can include transmitting, to a second UE, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE via a sidelink subchannel of a licensed carrier (block 1210). For example, the first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, and / or memory 282) can transmit, to a second UE, an indication of a plurality of data channels of an unlicensed carrier to be used to attempt one or more sidelink communications between the first UE and the second UE via a sidelink subchannel of a licensed carrier, as described above.

[0128] As Figure 12 further shown, in some aspects, process 1200 can include attempting one or more sidelink communications between the first UE and the second UE using the plurality of data channels (block 1220). For example, the first UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, and / or memory 282) can attempt one or more sidelink communications between the first UE and the second UE using the plurality of data channels, as described above.

[0129] Process 1200 can 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.

[0130] In a first aspect, the plurality of data channels are contiguous.

[0131] In a second aspect, alone or in combination with the first aspect, the indication identifies one or more resources of the licensed carrier to be used for hybrid automatic repeat request feedback corresponding to the plurality of data channels.

[0132] In a third aspect, alone or in combination with one or more of the first and second aspects, the indication includes one or more transmission parameters for the plurality of data channels, wherein the one or more transmission parameters include one or more carrier frequency indications for the plurality of data channels, one or more bandwidth part indicators for the plurality of data channels, one or more transmission configuration indicator states for the plurality of data channels, one or more time domain resource allocations for the plurality of data channels, one or more frequency domain resource allocations for the plurality of data channels, one or more modulation and coding schemes for the plurality of data channels, one or more hybrid automatic repeat request parameters for the plurality of data channels, one or more sounding reference signal resource indicators for the plurality of data channels, or a combination thereof.

[0133] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the plurality of data channels are grouped into a plurality of groups, and wherein data channels included in a same group are associated with one or more common transmission parameters.

[0134] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the plurality of data channels begin with one or more mini-slot based data channels.

[0135] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the indication is included in a sidelink control information, a MAC-CE, a radio resource control configuration message, or a combination thereof.

[0136] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the indication identifies a traffic direction for the plurality of data channels, wherein the traffic direction is from the first UE to the second UE or from the second UE to the first UE.

[0137] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the indication identifies a switch in a traffic direction between a first set of data channels of the plurality of data channels and a second set of data channels of the plurality of data channels.

[0138] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the indication identifies at least one of a time gap or a cyclic prefix extension for a listen-before-talk procedure associated with the switch in the traffic direction.

[0139] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, attempting the one or more sidelink communications includes performing a type 2 listen before talk procedure to transmit the sidelink communication in a later data channel of the plurality of data channels after successfully receiving the sidelink communication in an earlier data channel of the plurality of data channels.

[0140] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, attempting the one or more sidelink communications includes performing a first listen before talk procedure for a first data channel of the plurality of data channels, where the first UE will attempt to send a sidelink communication to the second UE, and selectively sending the sidelink communication via the first data channel based at least in part on whether the first listen before talk procedure is successful or performing a second listen before talk procedure for a second data channel of the plurality of data channels.

[0141] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, attempting the one or more sidelink communications includes performing a blind decoding for a data channel of the plurality of data channels, where the first UE will attempt to receive a sidelink communication from the second UE based at least in part on the indication.

[0142] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the indication and an initial data channel of the plurality of data channels are separated by a time gap.

[0143] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, a sidelink subchannel of the licensed carrier is mapped to an access window associated with the unlicensed carrier, and where a starting data channel of the plurality of data channels starts within the access window.

[0144] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, a first sidelink subchannel of the licensed carrier is associated with a first access window of the unlicensed carrier, the first access window having an earlier starting time than a second access window of the unlicensed carrier, the second access window being associated with a second sidelink subchannel of the licensed carrier, and where the first sidelink subchannel is associated with a channel access penalty factor that is greater than a channel access penalty factor associated with the second sidelink subchannel.

[0145] In a sixteenth aspect, alone or in combination with one or more of the first through fifteenth aspects, the first sidelink subchannel of the licensed carrier is associated with a first access window in the unlicensed carrier, the first access window having an earlier starting time than a second access window in the unlicensed carrier, the second access window being associated with a second sidelink subchannel of the licensed carrier, and wherein the first sidelink subchannel is associated with a higher quality of service priority than the second sidelink subchannel.

[0146] In a seventeenth aspect, alone or in combination with one or more of the first through sixteenth aspects, the first access window is associated with at least one of a different cyclic prefix extension range or a different number of mini-slots for the plurality of data channels than the second access window.

[0147] In an eighteenth aspect, alone or in combination with one or more of the first through seventeenth aspects, the licensed carrier and the unlicensed carrier are associated with separate channel occupancy state, separate channel occupancy limit for a same channel busy ratio value, or a combination thereof.

[0148] In a nineteenth aspect, alone or in combination with one or more of the first through eighteenth aspects, the channel occupancy limit for the unlicensed carrier is calculated based at least in part on a channel busy ratio measured for the licensed carrier.

[0149] In a twentieth aspect, alone or in combination with one or more of the first through nineteenth aspects, the channel occupancy limit for the unlicensed carrier is calculated based at least in part on a lesser of a first channel busy ratio estimate for the licensed carrier and a second channel busy ratio estimate for the unlicensed carrier.

[0150] In a twenty-first aspect, alone or in combination with one or more of the first through twentieth aspects, the indication further indicates that sidelink control information is to be transmitted using one or more of the plurality of data channels.

[0151] Although Figure 12 Example blocks of the process 1200 are illustrated, but in some aspects, the process 1200 can include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in FIG. 12. Additionally, or alternatively, two or more of the blocks of the process 1200 can be performed in parallel. Figure 12 In addition to or alternatively from the blocks depicted in FIG. 12, the process 1200 can include one or more of the following blocks.

[0152] Figure 13This is a diagram illustrating an example process 1300 performed, for example, by a second UE according to this disclosure. Example process 1300 is an example in which the second UE (e.g., UE 120) performs operations associated with permitted auxiliary-side walkway access using indications for multiple data channels.

[0153] like Figure 13 As shown, in some aspects, process 1300 may include receiving from a first UE via a sidelink subchannel of a licensed carrier a plurality of data channels for an unlicensed carrier to be used for attempting one or more sidelink communications between a second UE and the first UE (block 1310). For example, the second UE (e.g., using a receive processor 258, a controller / processor 280, and / or a memory 282) may receive from the first UE via a sidelink subchannel of a licensed carrier a plurality of data channels for an unlicensed carrier to be used for attempting one or more sidelink communications between the second UE and the first UE, as described above.

[0154] like Figure 13 As further shown, in some aspects, process 1300 may include: using multiple data channels to attempt one or more sidelink communications between the second UE and the first UE (block 1320). For example, the second UE (e.g., using a receive processor 258, a transmit processor 264, a controller / processor 280, and / or a memory 282) may use multiple data channels to attempt one or more sidelink communications between the second UE and the first UE, as described above.

[0155] Process 1300 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other processes described elsewhere herein.

[0156] In the first aspect, multiple data channels are continuous.

[0157] In the second aspect, either alone or in combination with the first aspect, the indication is used for one or more resources of a licensed carrier in response to a hybrid automatic repeat request corresponding to multiple data channels.

[0158] In a third aspect, alone or in combination with one or more of the first and second aspects, the indication includes one or more transmission parameters for the plurality of data channels, wherein the one or more transmission parameters include one or more carrier frequency indications for the plurality of data channels, one or more bandwidth part indicators for the plurality of data channels, one or more transmission configuration indicator states for the plurality of data channels, one or more time domain resource allocations for the plurality of data channels, one or more frequency domain resource allocations for the plurality of data channels, one or more modulation and coding schemes for the plurality of data channels, one or more hybrid automatic repeat request parameters for the plurality of data channels, one or more sounding reference signal resource indicators for the plurality of data channels, or a combination thereof.

[0159] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the plurality of data channels are grouped into a plurality of groups, and wherein data channels included in a same group are associated with one or more common transmission parameters.

[0160] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the plurality of data channels begin with one or more mini-slot based data channels.

[0161] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the indication is included in a sidelink control information, a MAC-CE, a radio resource control configuration message, or a combination thereof.

[0162] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the indication identifies a traffic direction for the plurality of data channels, wherein the traffic direction is from the first UE to the second UE or from the second UE to the first UE.

[0163] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the indication identifies a switch in a traffic direction between a first set of data channels of the plurality of data channels and a second set of data channels of the plurality of data channels.

[0164] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the indication identifies at least one of a time gap or a cyclic prefix extension for a listen-before-talk procedure associated with the switch in the traffic direction.

[0165] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, attempting the one or more sidelink communications includes performing a type 2 listen before talk procedure to transmit the sidelink communication in a later data channel of the plurality of data channels after successfully receiving the sidelink communication in an earlier data channel of the plurality of data channels.

[0166] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, attempting the one or more sidelink communications includes performing a first listen before talk procedure for a first data channel of the plurality of data channels, where the second UE will attempt to send a sidelink communication to the first UE, and selectively sending the sidelink communication via the first data channel based at least in part on whether the first listen before talk procedure is successful or performing a second listen before talk procedure for a second data channel of the plurality of data channels.

[0167] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, attempting the one or more sidelink communications includes performing a blind decoding for a data channel of the plurality of data channels, where the second UE will attempt to receive a sidelink communication from the first UE based at least in part on the indication.

[0168] In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the indication and an initial data channel of the plurality of data channels are separated by a time gap.

[0169] In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, a sidelink subchannel of the licensed carrier is mapped to an access window associated with the unlicensed carrier, and where a starting data channel of the plurality of data channels starts within the access window.

[0170] In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, a first sidelink subchannel of the licensed carrier is associated with a first access window of the unlicensed carrier, the first access window having an earlier starting time than a second access window of the unlicensed carrier, the second access window being associated with a second sidelink subchannel of the licensed carrier, and where the first sidelink subchannel is associated with a channel access penalty factor that is greater than a channel access penalty factor associated with the second sidelink subchannel.

[0171] In the sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, a first side-link subchannel of a licensed carrier is associated with a first access window in an unlicensed carrier, the first access window having an earlier start time than a second access window in an unlicensed carrier, the second access window being associated with a second side-link subchannel of the licensed carrier, and wherein the first side-link subchannel is associated with a higher quality of service priority than the second side-link subchannel.

[0172] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the first access window is associated with at least one of different cyclic prefix extension ranges or different numbers of mini-slots for multiple data channels, compared to the second access window.

[0173] In the eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, licensed and unlicensed carriers are associated with individual channel occupancy states, individual channel occupancy limits for the same channel busy rate value, or combinations thereof.

[0174] In the nineteenth aspect, either alone or in combination with one or more of the first to eighteenth aspects, the channel occupancy rate limit for an unlicensed carrier is calculated at least in part based on the channel busy rate measured for a licensed carrier.

[0175] In the twentieth aspect, either alone or in combination with one or more of the first to nineteenth aspects, the channel occupancy rate limit for an unlicensed carrier is calculated at least in part based on the smaller of a first channel busy rate estimate for a licensed carrier and a second channel busy rate estimate for an unlicensed carrier.

[0176] In the twenty-first aspect, alone or in combination with one or more of the first to twentieth aspects, the instruction also indicates that one or more of a plurality of data channels will be used to transmit side link control information.

[0177] Although Figure 13 An example box of process 1300 is shown, but in some aspects, process 1300 may include... Figure 13 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 1300 may be executed in parallel.

[0178] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or modifications and variations may be derived from practice in the aspects.

[0179] As used herein, the term “component” is intended to be broadly interpreted to encompass hardware and / or a combination of hardware and software. “Software” shall be broadly construed to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a processor is implemented in hardware and / or a combination of hardware and software. It will be apparent that systems and / or methods described herein can be implemented in different forms of hardware 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.

[0180] As used herein, depending on the context, satisfying a threshold can 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.

[0181] Even if a particular combination is recited in the claims and / or disclosed in the specification, the combination is not intended to limit the disclosure of the various aspects. Indeed, many combinations of the features recited in the claims can be used without departing from the scope of the disclosure. Although each dependent claim listed below can only directly depend on one claim, the disclosure of each aspect includes combinations of each dependent claim with every other claim in the set of claims. As used herein, 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 of 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).

[0182] 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 can be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items, and can be used interchangeably with “the one or more.” Also, as used herein, the terms “set” and “group” are intended to include one or more items (for example, related items, unrelated items, or a combination of related and unrelated items), and can 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,” 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 of items (for example, “a, b, or c” or “a, b, and c”) unless explicitly stated otherwise (for example, if used in the context of “either a, b, or c, but not both”).

Claims

1. A first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to: The instruction is transmitted to the second UE via a sidelink subchannel of a licensed carrier to an indication of a plurality of data channels on an unlicensed carrier for attempting one or more sidelink communications between the first UE and the second UE, wherein the indication identifies a handover in the service direction between a first set of data channels and a second set of data channels, and wherein the indication identifies at least one of a time gap or a cyclic prefix spread for a listen-before-speak procedure associated with the handover in the service direction; and The plurality of data channels are used to attempt one or more sidelink communications between the first UE and the second UE.

2. The first UE according to claim 1, wherein, The plurality of data channels are one or more of the following: Continuous; The data channels are divided into multiple groups, and the data channels included in the same group are associated with one or more common transmission parameters; or It begins with one or more mini-timeslot-based data channels.

3. The first UE according to claim 1, wherein, The indication identifier is to be used for one or more resources of the licensed carrier in the hybrid automatic repeat request feedback corresponding to the plurality of data channels.

4. The first UE according to claim 1, wherein, The indication includes one or more transmission parameters for the plurality of data channels, wherein the one or more transmission parameters include: One or more carrier frequency indications for the plurality of data channels One or more bandwidth portion indicators for the plurality of data channels, One or more transmission configuration indicator states for the plurality of data channels, One or more time-domain resources are allocated for the plurality of data channels. One or more frequency domain resources are allocated for the plurality of data channels. One or more modulation and coding schemes for the plurality of data channels, One or more hybrid automatic repeat request parameters for the plurality of data channels One or more probe reference signal resource indicators for the plurality of data channels, or Its combination.

5. The first UE according to claim 1, wherein, The indication is included in side link control information, media access control (MAC) control elements, radio resource control configuration messages, or combinations thereof.

6. The first UE according to claim 1, wherein, The indication identifies the service direction of the plurality of data channels, wherein the service direction is from the first UE to the second UE or from the second UE to the first UE.

7. The first UE according to claim 1, wherein, When attempting the one or more sidelink communications, the one or more processors are configured to: execute a type 2 listen-before-speak process to transmit the sidelink communication in a later data channel of the plurality of data channels after successfully receiving the sidelink communication in an earlier data channel of the plurality of data channels.

8. The first UE according to claim 1, wherein, When attempting one or more side link communications, the one or more processors are configured to: A first listen-before-speak procedure is performed on the first data channel among the plurality of data channels, wherein the first UE will attempt to send sidelink communication to the second UE; and Based at least in part on whether the first listen-before-speak process was successful, the side link communication is selectively transmitted via the first data channel, or a second listen-before-speak process is performed on a second data channel among the plurality of data channels.

9. The first UE according to claim 1, wherein, When attempting one or more sidelink communications, the one or more processors are configured to perform blind decoding for one of the plurality of data channels, wherein the first UE will attempt to receive sidelink communications from the second UE based at least in part on the indication.

10. The first UE according to claim 1, wherein, The indication and the initial data channel among the plurality of data channels are separated by a time gap.

11. The first UE according to claim 1, wherein, The sidelink subchannel of the licensed carrier is mapped to an access window associated with the unlicensed carrier, and wherein the starting data channel of the plurality of data channels begins within the access window.

12. The first UE according to claim 1, wherein, The first side-link subchannel of the licensed carrier is associated with a first access window in the unlicensed carrier, the first access window having an earlier start time than a second access window in the unlicensed carrier, the second access window being associated with a second side-link subchannel of the licensed carrier, and wherein the first side-link subchannel is associated with a channel access penalty factor greater than the channel access penalty factor associated with the second side-link subchannel.

13. The first UE according to claim 1, wherein, The first side-link subchannel of the licensed carrier is associated with a first access window in the unlicensed carrier, the first access window having an earlier start time than a second access window in the unlicensed carrier, the second access window being associated with a second side-link subchannel of the licensed carrier, and wherein the first side-link subchannel is associated with a higher quality of service priority than the second side-link subchannel, and wherein, compared to the second access window, the first access window is associated with at least one of different cyclic prefix extension ranges or different numbers of mini-slots for the plurality of data channels.

14. The first UE according to claim 1, wherein, The licensed carrier and the unlicensed carrier are associated with individual channel occupancy states, individual channel occupancy limits for the same channel busy rate value, or a combination thereof.

15. The first UE according to claim 1, wherein: The channel occupancy rate limit for the unlicensed carrier is calculated at least in part based on the channel busy rate measured for the licensed carrier; or The channel occupancy rate limit for the unlicensed carrier is calculated at least in part based on the smaller of a first channel busy rate estimate for the licensed carrier and a second channel busy rate estimate for the unlicensed carrier.

16. The first UE according to claim 1, wherein, The instruction also indicates that one or more of the plurality of data channels will be used to transmit side link control information.

17. A second user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured to: The instruction receives from a first UE via a sidelink subchannel of a licensed carrier an indication of a plurality of data channels of an unlicensed carrier to be used for attempting one or more sidelink communications between the second UE and the first UE, wherein the indication identifies a handover in the service direction between a first set of data channels and a second set of data channels, and wherein the indication identifies at least one of a time gap or a cyclic prefix spread for a listen-before-speak procedure associated with the handover in the service direction; and The plurality of data channels are used to attempt one or more sidelink communications between the second UE and the first UE.

18. The second UE according to claim 17, wherein, The indication includes one or more transmission parameters for the plurality of data channels, wherein the one or more transmission parameters include: One or more carrier frequency indications for the plurality of data channels One or more bandwidth portion indicators for the plurality of data channels, One or more transmission configuration indicator states for the plurality of data channels, One or more time-domain resources are allocated for the plurality of data channels. One or more frequency domain resources are allocated for the plurality of data channels. One or more modulation and coding schemes for the plurality of data channels, One or more hybrid automatic repeat request parameters for the plurality of data channels One or more probe reference signal resource indicators for the plurality of data channels, or Its combination.

19. The second UE according to claim 17, wherein: The indication is included in side link control information, media access control (MAC) control elements, radio resource control configuration messages, or combinations thereof; The indication identifies the service direction of the plurality of data channels, wherein the service direction is from the first UE to the second UE or from the second UE to the first UE.

20. The second UE according to claim 17, wherein, When attempting one or more side link communications, the one or more processors are configured to: A first listen-before-speak procedure is performed on the first data channel among the plurality of data channels, wherein the second UE will attempt to send sidelink communication to the first UE; and Based at least in part on whether the first listen-before-speak process was successful, the side link communication is selectively transmitted via the first data channel, or a second listen-before-speak process is performed on a second data channel among the plurality of data channels.

21. The second UE according to claim 17, wherein, When attempting one or more sidelink communications, the one or more processors are configured to perform blind decoding for one of the plurality of data channels, wherein the second UE will attempt to receive sidelink communications from the first UE based at least in part on the indication.

22. A method for wireless communication performed by a first user equipment (UE), comprising: Instructions are sent to a second UE via a sidelink subchannel of a licensed carrier to indicate multiple data channels of an unlicensed carrier intended for attempting one or more sidelink communications between the first UE and the second UE, wherein the indication identifies a traffic-direction handover between a first set of data channels and a second set of data channels, and wherein the indication identifies at least one of a time gap or a cyclic prefix spread for a listen-before-speak procedure associated with the traffic-direction handover; and The plurality of data channels are used to attempt one or more sidelink communications between the first UE and the second UE.

23. The method according to claim 22, wherein, Attempting one or more sidelink communications includes: performing a type 2 listen-before-speak procedure to transmit the sidelink communication in a later data channel of the plurality of data channels after successfully receiving the sidelink communication in an earlier data channel of the plurality of data channels.

24. The method according to claim 22, wherein, Attempting one or more side link communications includes: A first listen-before-speak procedure is performed on the first data channel among the plurality of data channels, wherein the first UE will attempt to send sidelink communication to the second UE; and Based at least in part on whether the first listen-before-speak process was successful, the side link communication is selectively transmitted via the first data channel, or a second listen-before-speak process is performed on a second data channel among the plurality of data channels.

25. A method for wireless communication performed by a second user equipment (UE), comprising: The instruction receives from a first UE via a sidelink subchannel of a licensed carrier an indication of a plurality of data channels of an unlicensed carrier to be used for attempting one or more sidelink communications between the second UE and the first UE, wherein the indication identifies a handover in the service direction between a first set of data channels and a second set of data channels, and wherein the indication identifies at least one of a time gap or a cyclic prefix spread for a listen-before-speak procedure associated with the handover in the service direction; and The plurality of data channels are used to attempt one or more sidelink communications between the second UE and the first UE.

26. The method of claim 25, wherein: The indication is included in side link control information, media access control (MAC) control elements, radio resource control configuration messages, or combinations thereof; The indication identifies the service direction of the plurality of data channels, wherein the service direction is from the first UE to the second UE or from the second UE to the first UE.

27. The method according to claim 25, wherein, Attempting one or more side link communications includes: A first listen-before-speak procedure is performed on the first data channel among the plurality of data channels, wherein the second UE will attempt to send sidelink communication to the first UE; and Based at least in part on whether the first listen-before-speak process was successful, the side link communication is selectively transmitted via the first data channel, or a second listen-before-speak process is performed on a second data channel among the plurality of data channels.

28. The method according to claim 25, wherein, Attempting one or more sidelink communications includes performing blind decoding on one of the plurality of data channels, wherein the second UE will attempt to receive sidelink communications from the first UE based at least in part on the indication.

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