Resource selection for multiple consecutive slot transmission for sidelink unlicensed

Abstract

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB). The UE may determine a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB. The UE may select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB. The UE may transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The UE may transmit the second TB with one or more transmissions in the one or more transmission occasions. Numerous other aspects are described.

Description

RESOURCE SELECTION FOR MULTIPLE CONSECUTIVE SLOT TRANSMISSION FOR SIDELINK UNLICENSEDCROSS-REFERENCE TO RELATED APPLICATION

[0001] This Patent Application claims priority to Greece Patent Application No.20230100750, fded on September 19, 2023, entitled “RESOURCE SELECTION FORMULTIPLE CONSECUTIVE SLOT TRANSMISSION FOR SIDELINK UNLICENSED,” and assigned to the assignee hereof. The disclosure of the prior Application is considered part of and is incorporated by reference into this Patent Application.FIELD OF THE DISCLOSURE

[0002] Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses associated with resource selection for multiple consecutive slot transmission (MCSt) for sidelink unlicensed (SL-U).BACKGROUND

[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like). Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single -carrier frequency division multiple access (SC- FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE- Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0004] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL”) refers to a communication link from the network node to the UE, and “uplink” (or “UL”) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via alocal link (e.g., a sidelink (SL), a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, among other examples).

[0005] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and / or global level. New Radio (NR), which may 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 orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and / or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple -output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.SUMMARY

[0006] Some aspects described herein relate to a user equipment (UE) for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB) associated with a first sidelink grant. The one or more processors may be configured to determine a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant. The one or more processors may be configured to select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant. The one or more processors may be configured to transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The one or more processors may be configured to transmit the second TB with one or more transmissions in the one or more transmission occasions.

[0007] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant. The method may include determining a remainingresource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant. The method may include selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant. The method may include transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The method may include transmitting the second TB with one or more transmissions in the one or more transmission occasions.

[0008] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant. The set of instructions, when executed by one or more processors of the UE, may cause the UE to determine a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant. The set of instructions, when executed by one or more processors of the UE, may cause the UE to select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit the second TB with one or more transmissions in the one or more transmission occasions.

[0009] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant. The apparatus may include means for determining a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant. The apparatus may include means for selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant. The apparatus may include means for transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The apparatus may include means for transmitting the second TB with one or more transmissions in the one or more transmission occasions.

[0010] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network entity, network node, wireless communication device, and / or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.

[0011] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.

[0012] While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-modulecomponent based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices). Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). It is intended that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of varying size, shape, and constitution.BRIEF DESCRIPTION OF THE DRAWINGS

[0013] So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, thatthe appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

[0014] Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.

[0015] Fig. 2 is a diagram illustrating an example of a network node in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.

[0016] Fig. 3 is a diagram illustrating an example of sidelink communications, in accordance with the present disclosure.

[0017] Fig. 4 is a diagram illustrating examples of sidelink communications in different coverage scenarios, in accordance with the present disclosure.

[0018] Fig. 5 is a diagram illustrating an example of sidelink resource selection and resource reservation, in accordance with the present disclosure.

[0019] Fig. 6 is a diagram illustrating an example of triggering sidelink resource selection, in accordance with the present disclosure.

[0020] Figs. 7A-7D are diagrams illustrating examples associated with resource selection for multiple consecutive slot transmission (MCSt) for sidelink unlicensed (SL-U) based on a candidate resource set including one or more multi-slot resources, in accordance with the present disclosure.

[0021] Fig. 8 is a diagram illustrating an example process associated with resource selection for MCSt for SL-U based on a candidate resource set including one or more multi-slot resources, in accordance with the present disclosure.

[0022] Figs. 9A-9B are diagrams illustrating examples associated with resource selection for MCSt for SL-U based on a candidate resource set including one or more single slot resources, in accordance with the present disclosure.

[0023] Fig. 10 is a diagram illustrating an example process associated with resource selection for MCSt for SL-U, in accordance with the present disclosure.

[0024] Fig. 11 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION

[0025] In some cases, UEs may communicate on a sidelink over unlicensed spectrum, sometimes referred to as sidelink unlicensed (SL-U), where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a transmitting device (e.g., a Tx UE) may contend against other devices for channel accessbefore transmitting on a shared or unlicensed channel (e.g., to a receiving UE (Rx UE)) to reduce and / or prevent collisions on the shared or unlicensed channel. To contend for channel access, the transmitting device may perform a channel access procedure, such as a listen-before- talk (or listen-before-transmit) (LBT) procedure or another channel access procedure, for shared or unlicensed frequency band channel access. The channel access procedure may be performed to determine whether the physical channel (e.g., the radio resources of the channel) is free to use, or is busy (e.g., in use by another wireless communication device such as a UE, an Internet of Things (loT) device, or a wireless local area network (WLAN) device, among other examples). The channel access procedure may include sensing or measuring the physical channel (e.g., performing a reference signal received power (RSRP) measurement, a received signal strength indicator (RS SI) measurement, detecting an energy level, or performing another type of measurement) during a channel access gap (which may also be referred to as a contention window (CW)) and determining whether the shared or unlicensed channel is free or busy based at least in part on the signals sensed or measured on the physical channel (e.g., based at least in part on whether the measurement satisfies a threshold). If the transmitting device determines that the channel access procedure was successful, the transmitting device may perform one or more transmissions on the shared or unlicensed channel during a transmission opportunity, which may initiate (e.g., using type 1 LBT) or share (e.g., using type 2 LBT) a channel occupancy time (COT).

[0026] In general, when a Tx UE acquires or otherwise obtains a COT that allows the Tx UE to transmit one or more sidelink communications over an unlicensed channel (e.g., after performing a successful LBT procedure), the Tx UE may attempt to maximize usage of the COT with continuous transmissions to the extent possible (e.g., by transmitting multiple TBs over multiple consecutive slots during the COT) in order to avoid intermittent or discontinuous sidelink transmissions that would otherwise require the Tx UE to perform another successful channel access procedure prior to a discontinuous transmission. For example, sidelink throughput may worsen as the number of channel access procedures increases for a given number of transmissions because there is a risk that LBT completion may be delayed in cases where the medium is sensed to be busy (e.g., due to competition for channel access from other sidelink UEs, WLAN devices, or other devices in proximity that are also attempting to communicate over the unlicensed channel). Furthermore, a transmission delay may potentially result due to LBT failure, which is reported to a medium access control (MAC) layer from a physical (PHY) layer that performs the LBT procedure, when the Tx UE is unable to fulfill a granted transmission (e.g., the Tx UE is unable to perform a granted transmission at the transmission occasion due to the LBT failure). In such cases, the Tx UE needs to obtain a new sidelink grant (e.g., by performing another resource selection), which further reduces sidelink throughput. Furthermore, a sidelink transmission may be dropped in cases where a successfulLBT procedure is not completed within a certain latency requirement (e.g., within a packet delay budget (PDB)), which may degrade the reliability and / or performance for sidelink communication.

[0027] Accordingly, in some cases, sidelink communication in unlicensed spectrum (e.g., SL-U operation) may support techniques to enable sidelink resource sensing, resource selection, and resource reservation for multiple consecutive slots such that a UE can transmit multiple TBs over an unlicensed sidelink channel within a COT (e.g., after a successful LBT procedure). For example, as described herein, a Tx UE communicating over an unlicensed sidelink channel may support one or more multiple consecutive slot transmission (MCSt) techniques such that the Tx UE can transmit multiple TBs (e.g., corresponding to different TBs and / or an initial transmission of a TB followed by one or more retransmissions of the TB) in consecutive or contiguous slots to increase the efficiency of sidelink communication in unlicensed or other shared spectrum subject to a channel access mechanism. For example, as described in more detail elsewhere herein, a Tx UE may implement or otherwise support a first MCSt technique that enables a best effort for multiple TBs (e.g., by identifying a set of candidate single-slot resources using a Layer 1 (LI) candidate resource allocation procedure, selecting a set of resources from the set of candidate single-slot resources randomly or according to one or more consecutive-slots criteria, and then repeating the resource selection process for different TBs if needed). Additionally, or alternatively, a Tx UE may implement or otherwise support a second MCSt technique that guarantees MCSt for a single TB and provides a best effort for multiple TBs (e.g., by triggering LI candidate resource selection to identify a set of candidate multi-slot resources, selecting a set of resources from the set of candidate multi-slot resources randomly or according to one or more consecutive-slots criteria, and then repeating the resource selection process for different TBs if needed). In this way, the Tx UE may transmit multiple TBs during a COT that is acquired following a successful LBT procedure, which may reduce the number of LBT procedures that need to be performed to transmit the multiple TBs and improve throughput and / or latency over the unlicensed sidelink channel.

[0028] However, one challenge that may arise with MCSt resource selection techniques is that a sidelink grant associated with one or more selected resources (e.g., resources for an initial transmission of a TB and one or more retransmissions of the TB or resources with a semi- persistent (SPS) scheduling reservation for periodic TBs) is triggered by an available MAC protocol data unit (PDU) or TB, which is then associated with a sidelink process by a hybrid automatic repeat request (HARQ) entity. For example, when the first MCSt technique is used to enable best effort for multiple TBs, there is a possibility that resources that are independently selected for different TBs (e.g., a first TB and a second TB) are not contiguous. Additionally, or alternatively, when the second MCSt technique is used to guarantee MCSt for a single TB and enable best effort for multiple TBs, N1 slots may be selected for a first TB and N2 slots may beselected for a second TB. In cases where an LBT procedure is successful at the zth slot of the N1 slots selected for the first TB, the Tx UE may need to use the remaining slots (e.g., slots (i+1) ~ Nl) to ensure contiguous slot transmissions.

[0029] Accordingly, some aspects described herein relate to enhanced sidelink resource techniques that may enable MCSt for SL-U operation. For example, when a Tx UE uses the first MCSt technique to transmit during multiple consecutive slots, the single-slot resources selected for a first sidelink grant associated with a first TB may be indicated in a shared selected resource set, which may be checked or referenced by a resource selection or reselection process associated with a second side link grant for a second TB. In this way, some aspects described herein may ensure that resources that are independently selected for different TBs are contiguous when the first MCSt technique is used to transmit during multiple consecutive slots of a COT. Additionally, or alternatively, when a Tx UE uses the second MCSt technique, the remaining resources associated with a first sidelink grant for a first TB after a successful LBT procedure for one or more transmissions of the first TB may be transferred via a shared remaining resource set to a second sidelink grant associated with a second TB. In such cases, the remaining resource set shared with the second sidelink grant may be inserted into the resources selected for the second sidelink grant based on a time difference between a first time when the first TB triggered resource selection and a second time when the second TB triggered resource selection. In this way, some aspects described herein may enable the Tx UE to use the remaining slots that are selected for a first TB to ensure contiguous slot transmissions for a second TB when the second MCSt technique is used to transmit during multiple consecutive slots of a COT. In this way, some aspects described herein may enable a Tx UE to maximize usage of a COT that is acquired after a successful sidelink LBT procedure, which may improve sidelink throughput, reduce a probability of the Tx UE being unable to fulfill a granted sidelink transmission, and / or increase efficiency of sidelink communication.

[0030] Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to orother than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.

[0031] Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements”). These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

[0032] While aspects may be described herein using terminology commonly associated with a 5G or New Radio (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).

[0033] Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, among other examples. The wireless network 100 may include one or more network nodes 110 (shown as a network node 110a, a network node 110b, a network node 110c, and a network node 1 lOd), a user equipment (UE) 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e), and / or other entities. A network node 110 is a network node that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes. For example, a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). As another example, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station), meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0034] In some examples, a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU. In some examples, a network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or moreDUs. A network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, a transmission reception point (TRP), a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, and / or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.

[0035] In some examples, a network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” can refer to a coverage area of a network node 110 and / or a network node subsystem serving this coverage area, depending on the context in which the term is used. A network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG)). A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. In the example shown in Fig. 1, the network node 110a may be a macro network node for a macro cell 102a, the network node 110b may be a pico network node for a pico cell 102b, and the network node 110c may be a femto network node for a femto cell 102c. A network node may support one or multiple (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a network node 110 that is mobile (e.g., a mobile network node).

[0036] In some aspects, the terms “base station” or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, “base station” or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC), or a Non-Real Time (Non-RT) RIC, or a combination thereof. In some aspects, the terms “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the network node 110. In some aspects, the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity of different devices (which may be located in the same geographiclocation or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the terms “base station” or “network node” may refer to any one or more of those different devices. In some aspects, the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.

[0037] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive a transmission of data from an upstream node (e.g., a network node 110 or a UE 120) and send a transmission of the data to a downstream node (e.g., a UE 120 or a network node 110). A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in Fig. 1, the network node 1 lOd (e.g., a relay network node) may communicate with the network node 110a (e.g., a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, or the like.

[0038] The wireless network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, or the like. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, macro network nodes may have a high transmit power level (e.g., 5 to 40 watts) whereas pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0039] A network controller 130 may couple to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or may include a CU or a core network device.

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

[0041] Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE and / or an eMTC UE may include, for example, a robot, an unmanned aerial vehicle, a remote device, a sensor, a meter, a monitor, and / or a location tag, that may communicate with a network node, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered loT devices, and / or may be implemented as NB-IoT (narrowband loT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and the memory components may be coupled together. For example, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0042] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, an air interface, or the like. A frequency may be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0043] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (e.g., without using a network node 110 as an intermediary to communicate with one another). For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to- vehicle (V2V) protocol, a vehicle -to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol), and / or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the network node 110.

[0044] Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. For example, devices of the wireless network 100 may communicateusing one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

[0045] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz - 24.25 GHz). Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz - 71 GHz), FR4 (52.6 GHz - 114.25 GHz), and FR5 (114.25 GHz - 300 GHz).Each of these higher frequency bands falls within the EHF band.

[0046] With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and techniques described herein are applicable to those modified frequency ranges.

[0047] In some aspects, the UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant; determine a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and transmit the second TB with one or more transmissions in the one or more transmission occasions. Additionally, oralternatively, the communication manager 140 may perform one or more other operations described herein.

[0048] As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.

[0049] Fig. 2 is a diagram illustrating an example 200 of a network node 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T> 1). The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R > 1). The network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.

[0050] At the network node 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120). The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS(s) selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may 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. The transmit processor 220 may 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 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems), shown as modems 232a through 232t. For example, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective modulator component to process (e.g., convert to analog, amplify, fdter, and / or upconvert) the output sample stream to obtain a downlink signal. The modems 232a through 232t maytransmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas), shown as antennas 234a through 234t.

[0051] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive the downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems), shown as modems 254a through 254r. For example, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may provide decoded control information and system information to a controller / processor 280. The term “controller / processor” may refer to one or more controllers, one or more processors, or a combination thereof. A channel processor may determine an RSRP parameter, a received signal strength indicator (RS SI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other examples. In some examples, one or more components of the UE 120 may be included in a housing 284.

[0052] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.

[0053] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and / or an antenna array may include one or more antenna elements (within a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmission and / or reception components, such as one or more components of Fig. 2.

[0054] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports that include RSRP, RSSI, RSRQ, and / or CQI) from the controller / processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processedby the modems 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna(s) 252, the modem(s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and / or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., the controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 7A-7D, Fig. 8, Figs. 9A-9B, Fig. 10, and / or Fig. 11).

[0055] At the network node 110, the uplink signals from UE 120 and / or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 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 the UE 120. The receive processor 238 may provide the decoded data to a data sink 239 and provide the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of the antenna(s) 234, the modem(s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and / or the TX MIMO processor 230. The transceiver may be used by a processor (e.g., the controller / processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 7A-7D, Fig. 8, Figs. 9A-9B, Fig. 10, and / or Fig. 11).

[0056] The controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or any other component(s) of Fig. 2 may perform one or more techniques associated with resource selection for MCSt for SL-U, as described in more detail elsewhere herein. For example, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or any other component(s) of Fig. 2 may perform or direct operations of, for example, process 1000 of Fig. 10 and / or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 and / or the 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. For example, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and / or interpreting) by one or more processors of the network node 110 and / or the UE 120, may cause the one or more processors, the UE 120, and / or the network node 110 to perform or directoperations of, for example, process 1000 of Fig. 10 and / or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.

[0057] In some aspects, the UE 120 includes means for selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant; means for determining a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; means for selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; means for transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and / or means for transmitting the second TB with one or more transmissions in the one or more transmission occasions. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0058] In some aspects, an individual processor may perform all of the functions described as being performed by the one or more processors. In some aspects, one or more processors may collectively perform a set of functions. For example, a first set of (one or more) processors of the one or more processors may perform a first function described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second function described as being performed by the one or more processors. The first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Fig.2. Reference to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Fig.2. For example, functions described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.

[0059] While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0060] As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.

[0061] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station, or a network equipment may be implemented in an aggregated or disaggregated architecture. For example, a base station (such as a Node B (NB), an evolved NB (eNB), an NR base station, a 5G NB, an access point (AP), a TRP, or a cell, among other examples), or one or more units (or one or more components) performing base station functionality, may be implemented as an aggregated base station (also known as a standalone base station or a monolithic base station) or a disaggregated base station. “Network entity” or “network node” may refer to a disaggregated base station, or to one or more units of a disaggregated base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0062] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A disaggregated base station (e.g., a disaggregated network node) may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other network nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU also can be implemented as virtual units, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), among other examples.

[0063] Base station-type operation or network design may consider aggregation characteristics of base station functionality. For example, disaggregated base stations may be utilized in an IAB network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)) to facilitate scaling of communication systems by separating base station functionality into one or more units that can be individually deployed. A disaggregated base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station can be configured for wired or wireless communication with at least one other unit of the disaggregated base station.

[0064] Fig. 3 is a diagram illustrating an example 300 of sidelink communications, in accordance with the present disclosure.

[0065] As shown in Fig. 3, a first UE 305-1 may 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 may communicate using the one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (e.g., which may include V2V communications, V2I communications, and / or V2P communications) and / or mesh networking. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more side link channels 310 may use a PC5 interface and / or may operate in a high frequency band (e.g., the 5.9 GHz band). Additionally, or alternatively, the UEs 305 may synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols) using global navigation satellite system (GNSS) timing.

[0066] As further shown in Fig. 3, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to communicate control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with a network node 110 via an access link or an access channel. The PSSCH 320 may be used to communicate data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUS CH) used for cellular communications with a network node 110 via an access link or an access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information used for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) where a TB 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to communicate sidelink feedback 340, such as HARQ feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and / or a scheduling request (SR).

[0067] Although shown on the PSCCH 315, in some aspects, the SCI 330 may include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2). The SCI-1 may be transmitted on the PSCCH 315. The SCI-2 may be transmitted on the PSSCH 320. The SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and / or spatial resources) reserved for future transmissions with the PSSCH 320, information for decoding sidelink communications on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS pattern, an SCI format for the SCI-2, a beta offset for the SCI-2, a quantity of PSSCH DMRS ports, and / or an MCS. The SCI-2 may include information associated with datatransmissions on the PSSCH 320, such as a HARQ process ID, a new data indicator (NDI), a source identifier, a destination identifier, and / or a channel state information (CSI) report trigger.

[0068] In some aspects, the one or more sidelink channels 310 may use resource pools. For example, the PSCCH 315 (e.g., with resource reservation included in SCI 330) may be transmitted with the PSSCH 320 (e.g., with data transmission) in a selected resource (e.g., a slot in time and a number of sub-channels in frequency).

[0069] In some aspects, a UE 305 may operate using a first resource allocation mode (e.g., mode 1, which may be referred to herein as a centralized scheduling mode or a network- controlled scheduling mode) in which resource selection and / or scheduling is performed by a network node 110. For example, in the centralized or network-controlled scheduling mode, the UE 305 may receive a grant (e.g., in downlink control information (DCI) for indicating resources with sidelink dynamic grant or for activating resources with sidelink configured grant type 2 or in a radio resource control (RRC) message for configuring resources with sidelink configured grant type 1) from the network node 110 for sidelink channel access and / or scheduling. In some aspects, a UE 305 may operate using a second resource allocation mode (e.g., mode 2, which may be referred to herein as a distributed scheduling mode or an autonomous scheduling mode) in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than a network node 110). In some aspects, the UE 305 may perform resource selection and / or scheduling in the distributed or autonomous scheduling mode by sensing resource availability for transmissions. For example, the UE 305 may decode the SCIs associated with various sidelink communications and exclude the resources reserved in the SCIs, or may measure an SL RSSI parameter (e.g., a sidelink-RSSI (S-RSSI) parameter), an SL RSRP parameter (e.g., a sidelink PSCCH-RSRP or sidelink PSSCH-RSRP parameter) and / or an SL RSRQ parameter (e.g., a sidelink PSCCH-RSRQ or sidelink PSSCH-RSRQ parameter) associated with various resources (e.g., used with various sidelink communications) and exclude the resources based on the associated measurement (e.g., SL RSSI measurement is above a threshold), and may select a resource (e.g., after excluding the resources) for transmission of a sidelink communication based at least in part on the measurement(s).

[0070] Additionally, or alternatively, the UE 305 may perform resource selection and / or scheduling in the distributed or autonomous scheduling mode using SCI 330 received in the PSCCH 315, which may indicate reserved resources and / or channel parameters. Additionally, or alternatively, the UE 305 may perform resource selection and / or scheduling by determining a channel busy rate (CBR) associated with various sidelink resources, which may 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).

[0071] In the distributed or autonomous scheduling mode, where resource selection and / or scheduling is performed by a UE 305, the UE 305 may generate sidelink grants, and maytransmit the grants in SCI 330. A sidelink grant may indicate, for example, one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks to be used for the upcoming sidelink transmission on the PSSCH 320 (e.g., for TBs 335), one or more slots to be used for the upcoming sidelink transmission, and / or an MCS to be used for the upcoming sidelink transmission. In some aspects, a UE 305 may generate a sidelink grant that indicates one or more parameters for semi- persistent scheduling (SPS), such as a periodicity of a sidelink transmission. Additionally, or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling, such as for an on-demand sidelink message.

[0072] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.

[0073] Fig. 4 is a diagram illustrating examples of sidelink communications in different coverage scenarios 400, 410, 420, in accordance with the present disclosure. For example, Fig. 4 illustrates an example of sidelink communications in an in-coverage scenario 400, an example of sidelink communications in a partial coverage scenario 410, and an example of sidelink communications in an out-of-coverage scenario 420.

[0074] As shown in Fig. 4, in the in-coverage scenario 400, a transmitter (Tx)Zreceiver (Rx) UE 402 and an Rx / Tx UE 404 may communicate with one another via a sidelink (e.g., a PC5 interface), as described above in connection with Fig. 3, and a network node 110 may communicate with the Tx / Rx UE 402 via a first access link and with the Rx / Tx UE 404 via a second access link (e.g., respective Uu interfaces). As shown, in the in-coverage scenario 400, the Tx / Rx UE 402 and the Rx / Tx UE 404 are both within the coverage of the network node 110, whereby sidelink communication between the Tx / Rx UE 402 and the Rx / Tx UE 404 may be performed in a centralized or network-controlled scheduling mode (e.g., mode 1) where sidelink resources are scheduled by the network node 110, or in a distributed or autonomous scheduling mode (e.g., mode 2) where the UEs 402 / 404 autonomously select sidelink resources from a configured sidelink resource pool based on a resource sensing mechanism.

[0075] As further shown in Fig. 4, in the in-coverage scenario 410, a Tx / Rx UE 402 is within the coverage area of a network node 110, and an Rx / Tx UE 404 is outside the coverage area of the network node 110. In the in-coverage scenario 410, the Tx / Rx UE 402 and the Rx / Tx UE 404 may communicate with one another via a sidelink (e.g., a PC5 interface), and the network node 110 may communicate with the Tx / Rx UE 402 via an access link (e.g., a Uu interface). Accordingly, in the in-coverage scenario 410, the network node 110 may enable either the centralized scheduling mode or the distributed scheduling mode for the Tx / Rx UE 402 within the coverage area of the network node 110, and the Rx / Tx UE 404 that is out-of-coverage may use only the distributed scheduling mode. Furthermore, in the out-of-coverage scenario 420, the Tx / Rx UE 402 and the Rx / Tx UE 404 are outside the coverage area of any network node.Accordingly, in the out-of-coverage scenario 420, only the distributed scheduling mode can be used to enable sidelink communication between the Tx / Rx UE 402 and the Rx / Tx UE 404.

[0076] As described herein, when a UE is to perform a sidelink transmission, the sidelink transmission may be performed according to one or more sidelink procedures and / or using one or more transmission parameters that are configured to streamline a channel access scheme that sidelink UEs follow either in the centralized or network-controlled scheduling mode or in the distributed or autonomous scheduling mode. In general, all communication parameters (e.g., transmission parameters such as transmit power and / or DMRS pattern, and procedural parameters indicating whether certain sidelink features and / or procedures are enabled or disabled) are centrally selected or otherwise controlled by the network in the centralized scheduling mode (e.g., mode 1). For example, in the centralized scheduling mode, a network node is aware of congestion, traffic conditions, interference, load, and / or other factors that may impact performance of the network node and the UEs within the coverage area of the network node, and the network node configures the sidelink communication parameters accordingly to optimize overall sidelink and / or cellular performance and / or per-UE performance.

[0077] On the other hand, in the distributed scheduling mode, there are various sidelink communication parameters that are independently or autonomously selected by a transmitting UE. For example, in the distributed scheduling mode, sidelink communication parameters may include preconfigured or configured parameters that have fixed values (e.g., a number of subchannels, a bandwidth of the subchannels, and / or a slot duration, among other examples) and locally configured parameters whose selection is left to the transmitting UE. For example, the locally configured parameters may include an MCS, a DMRS pattern, a transmit power, a maximum number of retransmissions for a given TB, a groupcast option 1 NACK distance (e.g., a distance over which a receiving UE can send a NACK for a sidelink transmission), and / or a beta parameter (e.g., related to coding associated with a transmitted waveform), among other examples. In some cases, the transmitting UE may select the locally configured parameters independently, possibly restricted over a set of allowed or permitted values, with the locally configured parameters having values that are selected by the UE in order to optimize performance of the UE with respect to one or more metrics that are typically applicationdependent. For example, a transmitting UE may select an MCS and a maximum number of HARQ retransmissions to maximize packet reliability, maximize throughput, and / or minimize latency, among other examples. Furthermore, the transmitting UE may select the locally configured parameters according to a preconfigured scheme (e.g., using a default value that may be application-dependent, such as a default value for a basic safety message (BSM)) and / or using more sophisticated techniques based on on-the-fly (e.g., current or instantaneous) measurements such as a CBR or perceived congestion on a sidelink channel.

[0078] As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.

[0079] Fig. 5 is a diagram illustrating an example 500 of side link resource selection and resource reservation, in accordance with the present disclosure. In some aspects, as described herein, example 500 relates to sidelink resource selection and resource reservation techniques that may be used in a resource allocation mode in which sidelink resource selection and / or scheduling is performed by a transmitting UE and / or a receiving UE (e.g., sidelink resource allocation mode 2).

[0080] For example, in sidelink resource allocation mode 2, which may also be referred to as an autonomous resource selection mode, UEs that communicate on a sidelink may perform exhaustive sidelink monitoring using a resource selection procedure in which time and frequency resources used for sidelink communication are randomly selected from a candidate resource set that is identified by sensing and exclusion. For example, as described herein, the exhaustive sidelink monitoring may include decoding SCI for all potential transmissions in all slots and subchannels within a resource pool. The decoded SCI generally includes SCI- 1 transmitted on a PSCCH, which is blindly decoded by all UEs, and the decoded SCI may further include SCI-2 transmitted on a PSSCH (e.g., if the SCI-1 is decoded). Accordingly, for receiving purposes, a UE may perform exhaustive sidelink monitoring in all sidelink slots and subchannels to decode SCI for a potential transmission to be received by the UE. Additionally, or alternatively, for transmitting purposes, a UE may perform exhaustive sidelink monitoring and sensing in all slots and subchannels to identify resources that are available for a sidelink transmission.

[0081] For example, as shown in Fig. 5, and by reference number 510, a UE that performs a resource selection procedure in sidelink resource allocation mode 2 may exhaustively monitor all slots and subchannels associated with a PSCCH during a sensing window for one or more SCI transmissions that reserve resources for an upcoming sidelink transmission. Accordingly, the UE may decode any SCI transmissions that are detected during the sensing window to determine resources that other UEs are occupying in the future (e.g., in a resource selection window subsequent to the sensing window), and the UE may be excluded from using resources that other UEs are occupying within the resource selection window. For example, in some aspects, the UE may measure an RSRP associated with one or more SCI transmissions that are decoded within the sensing window, and may further determine the resources that are reserved by the SCI transmission(s) within the resource selection window.

[0082] As further shown in Fig. 5, and by reference number 520, the measured RSRP associated with the decoded SCI within the sensing window may be projected onto the resources that the decoded SCI reserves within the resource selection window. For example, as shown inFig. 5, a UE may decode and measure an RSRP associated with a first SCI transmission from a first UE (shown as UEi), and the UE may further decode and measure an RSRP associated with a second SCI transmission from a second UE (shown as UE2) when performing PSSCH monitoring and RSRP measurement during the sensing window as part of a resource selection and reservation procedure. Accordingly, the UE may determine the time and frequency resources reserved by the first SCI transmission and the second SCI transmission, and may project the measured RSRPs associated with the first and second SCI transmissions onto the respective time and frequency resources that the first and second SCI transmissions reserve within the resource selection window (e.g., an SCI transmission and a PSSCH transmission scheduled by the SCI transmission may be expected to have the same or a similar RSRP).

[0083] In some aspects, within the resource selection window, resources associated with an RSRP that fails to satisfy (e.g., is below) a threshold are considered available, where the threshold may be based at least in part on a transmit priority associated with the transmitting UE and a receive priority that is indicated in the decoded SCI. Accordingly, in cases where the proportion of available resources in the resource selection window fails to satisfy (e.g., is below) a threshold, such as 20% or another suitable value, the RSRP threshold may be increased (e.g., by three (3) decibels or another suitable value) and the candidate resource identification process may be repeated. Alternatively, in cases where the proportion of available resources in the resource selection window satisfies (e.g., equals or exceeds) the threshold, the available resources in the resource selection window may form a candidate resource set, which the UE reports to higher layers for random resource selection. The UE may then perform the sidelink transmission using one or more available resources that are randomly selected from the candidate resource set.

[0084] As indicated above, Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.

[0085] Fig. 6 is a diagram illustrating an example 600 of triggering sidelink resource selection, in accordance with the present disclosure. In particular, as described herein, two or more UEs may communicate on a sidelink over unlicensed spectrum, sometimes referred to as SL-U operation, where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a Tx UE may contend against other devices for channel access before transmitting on a shared or unlicensed channel (e.g., to an Rx UE) to reduce and / or prevent collisions on the shared or unlicensed channel. To contend for channel access, the transmitting device may perform a channel access procedure, such as an LBT procedure or another channel access procedure, for shared or unlicensed frequency band channel access. The channel access procedure may be performed to determine whether the physical channel (e.g., the radio resources of the channel) is free to use or is busy (e.g., in use by another wireless communication device such as a UE, an loT device, or aWLAN device, among other examples). The channel access procedure may include sensing or measuring the physical channel (e.g., performing an RSRP or RSSI measurement, detecting an energy level, or performing another type of measurement) during a channel access gap (which may also be referred to as a CW) and determining whether the shared or unlicensed channel is free or busy based at least in part on the signals sensed or measured on the physical channel (e.g., based at least in part on whether the measurement satisfies a threshold). If the transmitting device determines that the channel access procedure was successful, the transmitting device may perform one or more transmissions on the shared or unlicensed channel during a transmission opportunity, which may acquire or extend a COT.

[0086] In general, when a Tx UE acquires or otherwise obtains a COT that allows the Tx UE to transmit one or more sidelink communications over an unlicensed channel (e.g., after performing a successful LBT procedure), the Tx UE may attempt to maximize usage of the COT with continuous transmissions to the extent possible (e.g., by transmitting multiple TBs over multiple consecutive slots during the COT) in order to avoid intermittent or discontinuous sidelink transmissions that would otherwise require the Tx UE to perform another successful channel access procedure prior to a discontinuous transmissions. For example, sidelink throughput may worsen as the number of channel access procedures increases for a given number of transmissions because there is a risk that LBT completion may be delayed in cases where the medium is sensed to be busy (e.g., due to competition for channel access from other sidelink UEs, WLAN devices, or other devices in proximity that are also attempting to communicate over the unlicensed channel). Furthermore, a transmission delay may potentially result due to LBT failure, which is reported to a MAC layer (or L2 layer) by a PHY layer (or LI layer) that performs the LBT procedure, when the Tx UE is unable to fulfill a granted transmission (e.g., the Tx UE is unable to perform a granted transmission at the transmission occasion due to the LBT failure). In such cases, the Tx UE needs to obtain a new sidelink grant (e.g., by performing another resource selection), which further reduces sidelink throughput. Furthermore, a sidelink transmission may be dropped in cases where a successful LBT procedure is not completed within a certain latency requirement (e.g., within a PDB), which may degrade sidelink reliability and / or performance.

[0087] Accordingly, in some cases, sidelink communication in unlicensed spectrum (e.g., SL-U operation) may support techniques to enable sidelink resource sensing, resource selection, and resource reservation for multiple consecutive slots such that a UE can transmit multiple TBs over an unlicensed sidelink channel within a COT (e.g., after a successful LBT procedure). For example, as described herein, a Tx UE communicating over an unlicensed sidelink channel may support one or more MCSt techniques such that the Tx UE can transmit multiple TBs (e.g., corresponding to different TBs and / or an initial transmission of a TB followed by one or moreretransmissions of the TB) in consecutive or contiguous slots to increase the efficiency of sidelink communication in unlicensed or other shared spectrum.

[0088] For example, a Tx UE may implement or otherwise support a first MCSt technique that enables a best effort for multiple TBs. For example, in the first MCSt technique, a higher layer (e.g., the MAC layer) may trigger LI candidate resource selection for one TB with one set of parameters (e.g., a transmission priority parameter, prioTX, a remaining PDB parameter, a number of logical subchannels parameter, fsl,bcn- and / or a reservation periodicity parameter, PrsVp TX)- The PHY layer then reports a set of candidate single-slot resources, SA, according to an LI candidate resource selection procedure, and the MAC layer selects a set of resources for the one TB randomly or according to one or more consecutive slots criteria to achieve MCSt. The Tx UE may then repeat the resource selection process for one or more additional TBs if needed. Additionally, or alternatively, a Tx UE may implement or otherwise support a second MCSt technique that guarantees MCSt for a single TB and provides a best effort for multiple TBs. For example, in the second MCSt technique, the MAC layer triggers LI candidate resource selection for one TB with one set of parameters (e.g., a transmission priority parameter, prioTX, a remaining PDB parameter, a number of logical subchannels parameter, fsl,bcn- and / or a reservation periodicity parameter, PrsvpTX) and a parameter that indicates a number of slots for MCSt (e.g., derived based on a channel access priority class (CAPC) of the logical channel or the TB). The PHY layer then reports a set of candidate multi-slot resources, SA, according to an LI candidate resource selection procedure, with an RSRP or RS SI calculation and / or threshold that may be varied relative to selection of single-slot resources (e.g., with a higher threshold value which may be based on CBR or the number of slots for MCSt), and the MAC layer selects a set of multi-slot resources from the set of candidate multi-slot resources randomly or according to one or more consecutive slots criteria to achieve MCSt. The Tx UE may then repeat the resource selection process for one or more additional TBs if needed. In this way, the Tx UE may transmit multiple TBs during a COT that is acquired following a successful LBT procedure, which may reduce the number of LBT procedures that need to be performed to transmit the multiple TBs and improve throughput and / or latency over the unlicensed sidelink channel.

[0089] Accordingly, to ensure that a sidelink communication satisfies one or more quality of service (QoS) requirements (e.g., related to latency and / or reliability, among other examples) when a Tx UE uses autonomous resource selection (e.g., sidelink resource allocation mode 2) to achieve MCSt, the MAC layer can indicate a number of consecutive slots for MCSt, Nsiot MCSt, that has a value larger than 1 to trigger LI reporting of a set of multi-slot candidate resources to the MAC layer. Otherwise, if the MAC layer does not indicate a number of consecutive slots for MCSt or indicates an Nsiot MCStparameter with a value of 1, the LI candidate resourcesreported to the MAC layer may include a set of single-slot candidate resources. The MAC layer then selects resources from the reported candidate resource set according to one or more techniques that may relate to a UE implementation. For example, the MAC layer may select resources from the reported candidate resource set using random selection, or the MAC layer may select resources in consecutive slots (e.g., the MAC layer is not restricted to selecting resources at random). In general, once the MAC layer selects the multi-slot resources from the set of candidate resources, the MAC layer need to use all the single-slot resources included in the selected multi-slot candidates for transmission.

[0090] However, one challenge that may arise with MCSt resource selection techniques is that a sidelink grant associated with one or more selected resources (e.g., resources for an initial transmission of a TB and one or more retransmissions of the TB or resources with an SPS scheduling reservation for periodic TBs) is triggered by an available MAC PDU or TB, which is then associated with a sidelink process by a HARQ entity. For example, in Fig. 6, example 600 depicts a MAC process and a PHY process that may be used to independently select resources for a first TB associated with a first sidelink grant and resources for a second TB associated with a second sidelink grant. As shown in Fig. 6, the PHY layer may sense resources during a sensing window, where the PHY layer may monitor all sidelink transmissions in the air and decode the SCI associated with the detected sidelink transmissions. As described herein, the SCI contains the resources that are reserved for retransmissions or new packet transmission in the future, whereby the Tx UE may read the SCI from different Tx UEs and identify resources that each Tx UE has reserved for one or more future transmissions. Accordingly, all the reserved resources may be excluded from a candidate resource set that is subsequently reported to the MAC layer when sidelink resource selection is triggered by an available MAC PDU or TB. Furthermore, the resource sensing may be performed during a sensing window, which is a sliding time window for identifying candidate resources that may be available for resource selection when an available MAC PDU or TB triggers sidelink resource selection.

[0091] As further shown in Fig. 6, when an available MAC PDU or TB triggers sidelink resource selection, the PHY layer then reports a set of candidate resources to the MAC layer, and the MAC layer selects the resources and associates the selected resource with a sidelink grant for the TB. For example, as shown, a first MAC PDU or TB, shown as MAC PDU 1 (TB 1), may become available at a first time. The PHY layer then reports, to the MAC layer, a first set of candidate resources, SAI, that may include single-slot resources for the first MCSt technique or multi-slot resources for the second MCSt technique (e.g., excluding any resources associated with reservations that were detected during the sensing window). The MAC layer then selects, from the first set of candidate resources reported by the PHY layer, a first set of resources, Ri, which is then associated with a first sidelink grant (e.g., shown as SL grant 1) and passed to a HARQ entity. The HARQ entity then associates the first sidelink grant (e.g.,with the first set of selected resources) with a first sidelink process (e.g., a first sidelink HARQ process). As further shown, the MAC entity may provide a first PSCCH and / or PSSCH transmission (e.g., at the transmission occasion based on the first sidelink grant) associated with the first TB to the PHY layer, which may be transmitted over the unlicensed or shared spectrum following a successful LBT procedure. As further shown in Fig. 6, a similar process may be performed independently for a second MAC PDU or TB, shown as MAC PDU2 (TB2), becomes available at a second time, subsequent to the time when the first MAC PDU or TB became available. In this case, the PHY layer may report a second set of candidate resources for the second MAC PDU or TB, SA2, and the MAC layer may select a second set of resources, R2, which is then associated with a second sidelink grant (e.g., shown as SU grant 2) and passed to the HARQ entity associating the second grant (e.g., the second set of selected resources) with a second sidelink process (e.g., a second sidelink HARQ process).

[0092] However, when the first MCSt technique is used to enable best effort for multiple TBs, there is a possibility that resources that are independently selected for different TBs (e.g., a first TB and a second TB) are not contiguous. For example, in the first MCSt technique, the MAC layer may select respective sets of resources for the first TB and the second TB, where each set of resources may include a first resource for an initial transmission of the packet, a second resource for a first retransmission of the packet (e.g., if the Rx UE sends a NACK to indicate that decoding failed), and so on for any additional retransmissions. Accordingly, the SCI transmitted by the Tx UE may indicate the resources reserved for one or more retransmissions, or for periodic traffic the SCI may indicate the future resources used for transmitting different TBs. Overall, however, the sidelink resource selection is per slot, whereby the candidate resource set(s) may include various single-slot resources that may be adjacent (contiguous) or separated in time (non-contiguous). Consequently, in cases where the Tx UE is attempting to perform contiguous transmissions over multiple consecutive slots (e.g., to avoid having to perform an LBT procedure for transmissions in subsequent slots), the MAC layer may need to select resources that are contiguous (e.g., using one or more consecutive slot criteria, because random selection may not guarantee that the selected resources are adjacent or contiguous). However, the resource selection processes are independent for separate TBs, which may result in resources independently selected for different TBs not being contiguous. Furthermore, when the second MCSt technique is used to guarantee MCSt for a single TB and enable best effort for multiple TBs, N1 slots may be selected for a first TB and N2 slots may be selected for a second TB. In cases where an LBT procedure is successful at the zth slot of the N1 slots selected for the first TB, the Tx UE may need to use the remaining slots (e.g., slots (i+1) ~N1) to ensure contiguous slot transmissions for the first TB and the second TB (e.g., to avoid having to perform another successful LBT procedure).

[0093] Accordingly, some aspects described herein relate to enhanced sidelink resource techniques that may enable MCSt for SL-U operation. For example, when a Tx UE uses the first MCSt technique to transmit during multiple consecutive slots, the single-slot resources selected for a first sidelink grant associated with a first TB may be indicated in a shared selected resource set, which may be checked or referenced by a resource selection or reselection process associated with a second side link grant for a second TB. In this way, some aspects described herein may ensure that resources that are independently selected for different TBs are contiguous when the first MCSt technique is used to transmit during multiple consecutive slots of a COT. Additionally, or alternatively, when a Tx UE uses the second MCSt technique, the remaining resources associated with a first sidelink grant for a first TB after a successful LBT procedure for one or more transmissions of the first TB may be transferred via a shared remaining resource set to a second sidelink grant associated with a second TB. In such cases, the remaining resource set shared with the second sidelink grant may be inserted into the resources selected for the second sidelink grant based on a time difference between a first time when the first TB triggered resource selection and a second time when the second TB triggered resource selection. In this way, some aspects described herein may enable the Tx UE to use the remaining slots that are selected for a first TB to ensure contiguous slot transmissions for a second TB when the second MCSt technique is used to transmit during multiple consecutive slots of a COT. In this way, some aspects described herein may enable a Tx UE to maximize usage of a COT that is acquired after a successful sidelink LBT procedure, which may improve sidelink throughput, reduce a probability of the Tx UE being unable to fulfill a granted sidelink transmission, and / or increase efficiency of sidelink communication.

[0094] As indicated above, Fig. 6 is provided as an example. Other examples may differ from what is described with regard to Fig. 6.

[0095] Figs. 7A-7D are diagrams illustrating examples 700 associated with resource selection for MCSt for SL-U based on a candidate resource set including one or more multi-slot resources, in accordance with the present disclosure. For example, as described herein, examples 700 relate to resource selection techniques that may be used to ensure contiguous slot transmissions using an MCSt technique that guarantees MCSt for a first TB and provides best effort to achieve MCSt for multiple TBs.

[0096] For example, in some aspects, examples 700 relate to MCSt resource selection techniques that may be used when the MAC layer triggers LI candidate resource selection for one TB with one set of parameters (e.g., a transmission priority, prioTX, a remaining PDB, a number of logical subchannels, fsl,bcn- and / or a reservation periodicity PrsvpTX) and a parameter that indicates a number of slots for MCSt. In such cases, the PHY layer may report a set of candidate multi-slot resources, SA, to the MAC layer, where each candidate multi-slotresource included in the set of candidate multi-slot resources comprises multiple contiguous resources or slots that are available to select for a first TB as a first sidelink grant (e.g., the multiple contiguous slots may be selected as multiple transmission occasions for an initial transmission of the first TB and one or more retransmissions of the first TB). Accordingly, the MAC layer may select a multi-slot resource (e.g., as multiple transmission occasions), Ri, either randomly or according to one or more consecutive slots criteria (e.g., the earliest available multi-slot resource), and the selected multi-slot resource, Ri, may be associated with a first sidelink grant which is then associated to a first sidelink process by HARQ entity (e.g., a first sidelink HARQ process for the first TB). For example, as shown in Fig. 7A, and by reference number 710, the Tx UE may select a multi-slot resource, Ri, that includes N1 slots, shown as rn through / -y.v; (e.g., N1 continuous or consecutive transmission occasions). For example, as used herein, the notation rw:generally represents the th resource or slot (within the set of AT consecutive slots) reserved for an h TB. As further shown in Fig. 7A, the Tx UE may perform a successful LBT procedure prior to the zth resource or slot of the multi-slot resource, shown as resource rn, and the first TB may be successfully transmitted in the / th resource or slot (e.g., at the ?th transmission occasion). Accordingly, as shown in Fig. 7A, and by reference number 712, remaining resources or slots (e.g., the remaining transmission occasions) that follow the successful transmission of the first TB may form a remaining resource set, Ri, that are available to be transferred to or otherwise shared with other sidelink grants. For example, in some aspects, the remaining resources or slots associated with a first sidelink grant for a first TB (e.g., Ri:rli+1~ r1N1for TB1), after a successful LBT (e.g., at resource r ) for one or more transmissions (e.g., an initial transmission at resource or transmission occasion rn, and blind retransmission(s) after resource or transmission occasion rn if enabled, as shown in Fig. 7C) of the first TB, may be transferred via a shared remaining resource set, SB, that is made available for a second sidelink grant for a second TB (e.g., TB2) that becomes available after the first TB.

[0097] Accordingly, when the MAC layer performs resource selection for the second TB, the resources that are available for selection by the MAC layer may be based on the remaining resource set, Ri, and a multi-slot resource, R2, selected for the second TB as a second sidelink grant. More particularly, the resources that are available for selection by the MAC layer for the second TB may be based on a time difference (At) between a first time when the first TB triggers resource selection for the first sidelink grant and a second time when the second TB triggers resource selection for the second sidelink grant. For example, as shown by reference number 720, the Tx UE may select a multi-slot resource for the second TB, R2, that includes N2 slots (e.g., N2 transmission occasions), shown as t‘21 through rzw. Accordingly, depending on the time difference between the first TB triggering resource selection for the first sidelink grant and the second TB triggering resource selection for the second sidelink grant, the selected multislot resource 2 may overlap with the multi-slot resource RI or remaining resource set Ri, mayfollow the multi-slot resource Rl or remaining resource set i without a time gap, or may follow the multi-slot resource Rl or remaining resource set i with a time gap. In some aspects, to support MCSt with different TBs, the update or re-evaluation of resource selection that the MAC layer performs for the second TB may therefore depend on the multi-slot resource, R2, selected for the second TB and the time difference between the first TB triggering resource selection for the first sidelink grant and the second TB triggering resource selection for the second sidelink grant.

[0098] For example, as shown by reference number 722 in Fig. 7A, the multi-slot resource selected for the second TB, R2, may overlap with the multi-slot resource Rl or remaining resource set Ri. In such cases, the MAC process associated with the first TB may drop the remaining resource set (e.g., Ri: rn+i ~ rm) from the set of resources that are included in the first sidelink grant for the first TB to a shared remaining resource set, SB, and the MAC process associated with the second TB may insert a subset of the resources included in the shared remaining resource set, SB, that do not overlap with R2 into the second sidelink grant. For example, in the scenario shown in Fig. 7A, R2 overlaps with all of the resources in the remaining resource set Ri except for resource rn+i. Accordingly, in the scenario shown by reference number 722, R2 with rn+i and R2, which represents the updated or re-evaluated resources that are available for the second TB, is a continuous set of resources or slots that includes all of the resources or slots that are selected for the second TB, R2, and the resource(s) or slot(s) in the remaining resource set Ri that do not overlap with R2 (e.g., R2: (rn+i)r2i ~ r2m).

[0099] Alternatively, as shown by reference number 724 in Fig. 7A, the resources selected for the second TB, R2, may follow the multi-slot resource Rl or remaining resource set R> without a time gap. In such cases, the MAC process associated with the first TB may similarly drop the remaining resource set (e.g., Rf. rli+1~ r1N1) from the set of resources that are included in the first sidelink grant for the first TB to a shared remaining resource set, SB, and the MAC process associated with the second TB may insert all of the resources included in the shared remaining resource set, SB, into the second sidelink grant. For example, in the scenario shown in Fig. 7A, R2 follows the multi-slot resource Rl or remaining resource set R without a time gap, and the remaining resource set Ri includes resources rn+i through r (e.g., based on the successful LBT procedure at resource or transmission occasion rit). Accordingly, in the scenario shown by reference number 724, the updated or re-evaluated resources or slots available for the second TB, R2, is a continuous set of resources or slots that includes all of the resources or slots that are selected for the second TB, R2, and all of the resource(s) or slot(s) in the remaining resource set Ri (e.g., R2: (rli+1r1N1) r2i~ r2N2).

[0100] Alternatively, as shown by reference number 726 in Fig. 7A, the resources selected for the second TB, R2, may follow the multi-slot resource Rl or remaining resource set R with atime gap. In such cases, the MAC process associated with the first TB may similarly drop the remaining resource set (e.g., i: rli+1~ r1N1) from the set of resources that are included in the first sidelink grant for the first TB to a shared remaining resource set, SB, and the MAC process associated with the second TB may insert all of the resources included in the shared remaining resource set, SB, into the second sidelink grant. In this scenario, however, the updated or reevaluated resources or slots for the second TB, R2, is a discontinuous set of resources or slots that includes all of the resources that are selected for the second TB, R2. and all of the resource(s) in the remaining resource set Ri (e.g., R2: (rn+i ~ rixi)(gap) r2i~ r2 2). In this case, the MAC process associated with the second TB may determine whether to transmit the second TB one or more times before the gap (e.g., consecutively following the transmission(s) of the first TB). For example, if the resource(s) or slot(s) before the gap is sufficient for the transmission(s) of the second TB, the MAC process associated with the second TB may instruct the transmission(s) of the second TB from the first or earliest resource or slot of the remaining resources inserted into the second sidelink grant (e.g., consecutively following the first TB transmission(s)). In this case, the MAC process associated with the second TB may drop the remaining resource(s) or slot(s) included in the second sidelink grant (e.g., R2: r^+i - r2N2if any resource(s) or slot(s) left in the remaining resource(s) or slot(s) transferred from the first sidelink grant, or R2: r21~ r2N2if no resource or slot left in the remaining resource(s) or slot(s) transferred from the first sidelink grant) into the remaining resource set, SB, which is shared with other sidelink grant(s). In another example, if blind retransmission(s) is enabled for the second TB and the resource(s) or slot(s) before the gap is insufficient for the transmissions of the second TB (e.g., initial transmission and blind retransmission(s), the MAC process associated with the second TB may instruct that the transmissions of the second TB be split with one or more transmissions before the gap (e.g., utilizing the remaining resources or slots) and remaining transmission(s) after the gap (e.g., the earliest resource(s) or slot(s) of the multi-slot resource R2). In this case, the MAC process associated with the second TB may determine to drop the remaining resource(s) or slot(s) included in the second sidelink grant (e.g., R2: r2t+i ~ r2N2) into the remaining resource set, SB, which is shared with other sidelink grant(s).

[0101] In some aspects, the MAC process associated with the first TB may determine to drop the remaining resource set (e.g., Ri: rn+i ~ rim) from the set of resources that are included in the first sidelink grant for the first TB to a shared remaining resource set, SB. For example, if the number of the remaining resources is small (e.g., below a threshold for supporting multiple transmissions of a second TB, for example, below the number of transmissions including initial transmission and blind retransmission(s) if enabled), the MAC process associated with the first TB may insert extra transmissions using the remaining resource(s) or slot(s) without dropping the remaining resource(s) or slot(s) into the remaining resource set, SB. In this scenario, the updated or re-evaluated resources or slots for the second TB, R2. is the same as the selectedmulti-slot resource for the second TB, R2, without consecutively following the transmission(s) of the first TB (e g., R2: r2i~ r222). Similarly, after a successful LBT at a transmission occasion (e.g., r2i) of the multiple transmission occasions (e.g., Ry r2i~ r2N2), the MAC process associated with the second TB may determine to drop the remaining resource set (e.g., R2: r2i+i ~ r2N2 if no blind retransmission) from the set of resources that are included in the second sidelink grant for the second TB to a shared remaining resource set, SB.

[0102] In some aspects, after a successful LBT at a transmission occasion of a multiple transmission occasions associated with a multi-slot resource selected, the MAC process associated with a TB (e.g., the MAC process associated with the first or second TB) may determine to trigger resource reselection or not. For example, if the resource(s) or slot(s) after a successful LBT is not enough for more than one transmission of the TB (e.g., if blind transmission(s) is enabled), the MAC process may reselect another multi-slot resource and update the sidelink grant with the reselected multi-slot resource. For another example, if no successful LBT at the end of the multiple transmission occasions (e.g., based on the multi-slot resource selected for the TB), the MAC process may reselect another multi-slot resource and update the sidelink grant with the reselected multi-slot resource. Furthermore, if consistent LBT failure is detected for the RB set(s) (e.g., RB set(s) for multi-slot resource selection or reselection), the MAC process may reselect another multi-slot resource in the same resource pool with the RB set associated with consistent LBT failure excluded or in a reselected resource pool with enough RB set(s) without consistent LBT failure detected, and the MAC process may update the sidelink grant with the reselected multi-slot resource with different RB set(s) or resource pool.

[0103] For example, Fig. 7B illustrates the manner in which resources that are selected for one or more transmissions of a first TB included in a first sidelink grant may be transferred to a second sidelink grant for a second TB’s transmission(s). For example, as shown in Fig. 7B and described in more detail elsewhere herein, the PHY layer may perform resource sensing and may report a first set of multi-slot candidate resources, SAI, to the MAC layer based on the first TB triggering resource selection. The MAC layer then selects a multi-slot resource (e.g., a set of consecutive, continuous, or contiguous slots), Ri, for the first TB, as a first sidelink grant, where the multi-slot resource Ri for the first TB includes N1 resources or slots, where N1 is an integer larger than one. As further shown and described in more detail elsewhere herein, a HARQ entity then associates the first sidelink grant (e.g., with the multi-slot resource or the set of resources Ri selected for the first TB) with a sidelink process (e.g., a sidelink HARQ process for initial transmissions and / or retransmissions), and further instructs a PSCCH / PSSCH transmission starting from the first of the multiple transmission occasions respectively associated with the resources or slots included in the first sidelink grant. A PSCCH / PSSCH transmission is performed for the first TB based on the PHY layer performing a successful LBTprocedure at resource rhwhere i is an integer having a value in a range from 1 to N1 (e.g., starting a type 1 LBT procedure for initiating a COT or a type 2 LBT procedure for sharing a COT from the first transmission occasion at rn, the second transmission occasion at r12if failed the LBT at previous transmission occasion at rn, the third transmission occasion at w, if failed the LBT at previous transmission occasion at r!2. and so on, till a successful LBT at rn before or at the end of the multiple transmission occasions). Accordingly, as shown by reference number 730, the PHY layer reports the successful LBT procedure to the MAC layer. As further shown in Fig. 7B, and by reference number 732, the MAC process associated with the first TB may then determine to drop the remaining (unused) resources included in the first sidelink grant (e.g., resources or slots R . rn+i ~ rim that are no longer needed for the first TB) from the first sidelink grant to a shared remaining resource set, SB. Accordingly, as shown by reference number 734, the resources in the shared remaining resource set, SB, include the remaining resource set, Ri (e.g., rn+i ~ rim), based on the successful LBT procedure at resource or transmission occasion rn.

[0104] As shown by reference number 736, the MAC process associated with a second TB may then determine to pick the remaining resources that were dropped into the shared remaining resource set SB (e.g., while at the resource selection as shown by reference number 740 or at the resource re-evaluation as shown by reference number 742 (e.g., T; time before the resource or slot for a transmission) and include at least a portion of the remaining resources into a second sidelink grant associated with the second TB. For example, depending on the time difference between the first TB triggering resource selection and the second TB triggering resource selection, the resources for the second TB, R2, may continuously include the multi-slot resource R2(e.g., a set of resources R2) selected for the second TB and a portion of the remaining resource set Ri that does not overlap with R2, may continuously include the multi-slot resource R2(e.g., the set of candidate resources R2) selected for the second TB and the remaining resource set Ri, or may discontinuously include the multi-slot resource R2(e.g., the set of candidate resources R2) selected for the second TB and the remaining resource set Ri (e.g., separated by a gap).

[0105] As shown by reference number 738, similarly, the MAC process associated with the second TB may then determine to drop the remaining resources R2(e.g., unused resources or slots picked from the remaining resource Ri transferred from the first sidelink grant to the second sidelink grant and / or unused resources from the multi-slot resource R2selected for the second TB that are no longer needed for the second TB) from the second sidelink grant to the shared remaining resource set, SB, which may be transferred to another sidelink grant (e.g., a third sidelink grant).

[0106] In some aspects, as described herein, a multi-slot resource (e.g., a set of resources that are selected for a first TB) included in a first sidelink grant, Ri, may generally include N1resources (or NI slots) for an initial transmission and one or more retransmissions of the first TB if enabled (e.g., via pre-configuration or configuration). Furthermore, the remaining resources to be dropped from the first sidelink grant may generally include one or more resources or slots that are not needed to transmit the first TB (e.g., if a successful LBT is received at an early transmission occasion of the multiple transmission occasions associated with the multi-slot resource and thus the remaining transmission occasions corresponding with the remaining resources or slots of the multi-slot resource are more than the transmissions (initial transmission and blind retransmission(s) if enabled) of the first TB). Accordingly, because the Tx UE may utilize one or more resources in Ri for one or more retransmissions of the first TB, the remaining resource set, Ri, that is dropped and shared with or transferred to the second sidelink grant may depend on the sidelink retransmission scheme that is configured for the first TB. For example, in some cases, the first TB may be associated with a blind retransmission scheme, where the Tx UE performs one or more blind retransmissions of the first TB without relying on any HARQ feedback that may indicate whether the first TB was successfully received and decoded by an Rx UE. In such cases, following a successful LBT procedure for the first TB at resource rn, the Tx UE may perform an initial transmission of the first TB that is followed by one or more blind retransmissions of the first TB. Accordingly, in cases where blind retransmissions are preconfigured or configured for the first TB, the remaining resource set, Ri, that is dropped from the first sidelink grant and shared with the second sidelink grant may include one or more resources or slots that follow the one or more blind retransmissions.

[0107] For example, Fig. 7C illustrates a scenario where a selected multi-slot resource Ri (e.g., corresponding to the set of resources selected for the initial transmission and the one or more blind retransmissions of the first TB) includes Nl slots or transmission occasions. Accordingly, as shown by reference number 740, a successful LBT procedure is performed at (e.g., just prior to or during a contention window associated with) resource or slot rn, which is followed by an initial transmission of the first TB in resource or slot r . As further shown by reference number 742, the initial transmission of the first TB is followed by m blind retransmissions of the first TB in resource r +i through resource r +m, where m is an integer having a value equal to or greater than 1. Accordingly, as shown by reference number 744, the remaining resource set, Ri, to be dropped from the first sidelink grant and shared with or transferred to the second sidelink grant, includes one or more resources, if any, that follow the m blind retransmissions (e.g., a set of resources starting from resource rn+m+i through resource rm). Furthermore, as described in more detail above with reference to Figs. 7A-7B, the updated or re-evaluated resources that are then available for the second TB, R2, may continuously include the set of resources R2 selected for the second TB and a portion of the remaining resource set Ri that does not overlap with R2 (e.g., a union of R2 and a subset of Rithat does not overlap with R2) when R2overlaps with Ri. may continuously include the set of resources R2selected for the second TB and the remaining resource set i (e.g., a continuous union of R2and i) when R2follows i without a time gap, or may discontinuously include the set of resources R2selected for the second TB and the remaining resource set Ri (e.g., a union of R2and Ri, separated by a time gap) when R2follows Ri with a time gap.

[0108] Additionally, as shown by reference number 746, the initial transmission (e.g., at resource or slot rn+m+i) of the second TB is followed by n blind retransmissions of the second TB in n consecutive resources or slots after resource or slot rn+m+i, where n is an integer having a value equal to or greater than 1. Accordingly, as shown by reference number 748, the MAC process associated with the second TB may determine a remaining resource set, R2. to be dropped from the second sidelink grant and shared with or transferred to another sidelink grant (e.g., a third grant for a third TB), includes one or more resources, if any, that follow the n blind retransmissions. Furthermore, as described in more detail above, when R2follows R with a time gap, the MAC process associated with the second TB may determine to fill in the remaining resource(s) of Ri, if any (e.g., resource or slot rim as shown), before the gap, with the same TB transmission (e.g., another TB retransmission as marked with [TB2]) and drop the unused R2to the shared remaining resource set SB (e.g., as shown by reference number 748c). In some aspects, the MAC process associated with the second TB may determine to drop the unused resources in both Ri and R2(e.g., if enough remaining resources of Ri are available for transmissions of a third TB).

[0109] Additionally, as shown by reference number 750, the SCI transmitted with an initial transmission may indicate the reserved resources of a multi-slot resource (e.g., reserved resources or slots rli+i~ r1N1(included) of the multi-slot resource Ri, as shown by reference number 750a, or the reserved resources or slots r22~ r2N2(included) of the multi-slot resource R2. as shown by reference number 750b). For example, a field in SCI may indicate the ending resource or slot index (e.g., the index of resource or slot rim of the multi-slot resource Ri or the index of resource or slot r222of the multi-slot resource R2). That is the resources or slots from the first resource or slot after the SCI transmitted with an initial transmission (e.g., the resource or slot rn+i of the multi-slot resource Ri or the resource or slot r22of the multi-slot resource R2) to the ending resource or slot as indicated (e.g., the resource or slot rm of the multi-slot resource Ri or the resource or slot r222of the multi-slot resource R2) are reserved. In this case, the announced remaining resources or slots need to be filled with extra transmissions of the same TB (e.g., rm filled with extra TB1 as shown) or dropped to the remaining resource set SB to be transferred to another sidelink grant with another TB (e.g., the remaining resources R2. as shown by the reference number 748a, transferred to a third sidelink grant with a third TB).

[0110] Additionally, or alternatively, as shown by reference number 752, the SCI not transmitted with an initial transmission may not announce the reserved resources of a multi-slotresource (e.g., reserved resources or slots r22~ r2N2 (included) of the multi-slot resource R2, as shown). In this case, the unannounced remaining resources or slots may be dropped to the remaining resource set SBto be transferred to another sidelink grant with another TB (e.g., the remaining resources2. as shown by the reference numbers 748b or 748c, transferred to a third sidelink grant with a third TB) or may be simply dropped without transferring to another sidelink grant (e.g., there is no data available in the buffer to be transmitted).

[0111] Additionally, or alternatively, Fig. 7D illustrates a scenario where the first sidelink grant associated with the first TB is associated with a HARQ-based retransmission scheme. For example, in a blind retransmission scheme, a Tx UE may perform an initial transmission of a TB that is followed by one or more blind retransmissions regardless of any HARQ feedback from the Rx UE. In such cases, the blind retransmissions may increase a probability that the Rx UE is able to successfully receive and decode the first TB without the Rx UE having to transmit HARQ feedback indicating whether the PSCCH / PSSCH corresponding to the first TB was successfully received and / or decoded. However, blind retransmissions may unnecessarily occupy the unlicensed or shared spectrum that other devices are attempting to access in cases where the Rx UE successfully receives and / or decodes the initial transmission of the first TB or a retransmission of the first TB (e.g., the first retransmission of m blind retransmissions of TB1 or n blind retransmissions of TB2, where multiple blind retransmissions are preconfigured or configured, as described in connection with Fig. 7C). Accordingly, in some cases, a HARQ- based retransmission scheme may be enabled for one or more sidelink TBs (or sidelink grants), where the Tx UE retransmits a PSCCH / PSSCH for a given TB based on receiving HARQ feedback that includes a NACK for an initial transmission or a retransmission of the TB or based on not receiving HARQ feedback for an initial transmission or a retransmission of the TB (e.g., the Tx UE does not perform a retransmission if the Rx UE transmits an ACK). In such cases, the remaining resource set, i. for a first sidelink grant associated with a first TB after a successful LBT procedure for a transmission of a first TB associated with HARQ retransmissions may correspond to a set of resources that follow the initial transmission.

[0112] In some aspects, some of the selected resources or slots may contain gap symbol and PSFCH symbols for HARQ feedback. In this case the PHY may rate match with available PSSCH symbols and fill in the gap and or PSFCH symbols with CPE (cyclic prefix extension) or dummy PSFCH (to avoid blocking other UE’s PSFCH transmission) to retain the COT.

[0113] For example, Fig. 7D illustrates a scenario where a first multi-slot resource Ri (e.g., corresponding to a first set of consecutive resources or slots) selected for the initial transmission occasions of a first TB includes N1 slots (e.g., shown as rn through rim) and a second multi-slot resource R ’i (e.g., corresponding to a second set of consecutive resources or slots) selected for the first retransmission occasions of a first TB includes N1 slots (e.g., shown as r’n through r ’INI). Accordingly, as shown by reference number 750, a successful LBT procedure isperformed at (e.g., just prior to or during a contention window associated with) resource or slot rn, which is followed by an initial transmission of the first TB in resource or slot rn. As further shown by reference number 752, a HARQ process associated with the first TB may be associated with a minimum gap, which may define a minimum time between the initial transmission of the first TB and a first retransmission of the first TB (e.g., the minimum gap between each resource or slot of Ri for initial transmission occasions and the corresponding resource or slot of R ’i for first retransmission occasions). Accordingly, as shown by reference number 754, the SCI transmitted with the initial transmission at transmission occasion ru of the initial transmission occasions (e.g., associated with the first multi-slot resource R ) may indicate a reserved transmission occasion r ’n of the first retransmission occasions (e.g., associated with the second multi-slot resource R ’;). In such cases, as shown by reference number 756, a first remaining resource set, Ri, includes one or more resources or slots which may be dropped from the first side link grant and shared with or transferred to one or more sidelink grants (e.g., a second sidelink grant for a second TB, a third sidelink grant for a third TB, and so on) for initial transmission occasions, if any, that follow the resource or slot for the initial transmission of the first TB at initial transmission occasion ru+ (e.g., a set of resources starting from resource rn+ through resource rim . In this way, as shown by reference number 760, initial transmissions may be conducted consecutively with the initial transmission of TB1 at ru, the initial transmission of TB2 at rli+1, the initial transmission of TB3 at rli+2, and so on. Furthermore, the updated or re-evaluated resources for the second TB, R2. may continuously include the set of resources R2selected for the second TB and a portion of the remaining resource set R that does not overlap with R2(e.g., a union of R2and a subset of R that does not overlap with R2) when R2overlaps with Ri, may continuously include the set of resources R2selected for the second TB and the remaining resource set Ri (e.g., a continuous union of R2and R ) when R2follows R without a time gap, or may discontinuously include the set of resources R2selected for the second TB and the remaining resource set Ry (e.g., a union of R2and Ri, separated by a time gap) when R2follows Ri with a time gap. Furthermore, as shown by reference number 758, a second remaining resource set, R ), includes one or more resources or slots which may be dropped and shared with or transferred to one or more sidelink grants for first retransmission occasions, if any, that follow the resource or slot for the first HARQ-based retransmission of the first TB at the first retransmission occasion r ’n+ (e.g., a set of resources starting from resource r ’n+ through resource r ’INI). In this way, as shown by reference number 762, first retransmissions may be conducted consecutively with the first retransmission of TB 1 at r ’n, the first retransmission of TB2 at r ’u+i, the first retransmission of TB3 at r’u+2, and so on.

[0114] As indicated above, Figs. 7A-7D are provided as examples. Other examples may differ from what is described with regard to Figs. 7A-7D.

[0115] Fig. 8 is a diagram illustrating an example process 800 associated with resource selection for MCSt for SL-U based on a multi-slot candidate resource set including one or more multi-slot resources, in accordance with the present disclosure. For example, process 800 relates to resource selection techniques that may ensure contiguous slot transmissions using an MCSt technique that guarantees MCSt for a first TB and provides best effort to achieve MCSt for multiple TBs when one or more TBs become available after the first TB, as described in more detail above with respect to Figs. 7A-7D.

[0116] For example, as shown in Fig. 8, at block 810, a MAC PDU or TB (e.g., TB z) is available for transmission, which triggers resource selection. As further shown in Fig. 8, at block 820, a MAC layer may perform resource selection responsive to the MAC PDU or TB being available for transmission. For example, in some aspects, the MAC layer may perform resource (re-)selection by (re-)selecting a multi-slot resource Ri (e.g., containing Ni consecutive resources or slots) for multiple consecutive transmission occasions for an initial transmission of TB i (and one or more blind retransmission(s) of TB i if enabled) from a joint set of resources that includes a candidate multi-slot resource set SA and a shared remaining resource set SB (if there are any remaining resources or slots shared by another sidelink process). Additionally, or alternatively, if HARQ retransmission is enabled, the MAC layer may perform resource (re- )selection by (re-)selecting a first multi-slot resource Ri (e.g., containing Ni consecutive resources or slots) for a first multiple consecutive transmission occasions for an initial transmission of TB z, a second multi-slot resource R ’i (e.g., containing Az' consecutive resources or slots) for a second multiple consecutive transmission occasions for a first HARQ retransmission of TB z, and / or a third multi-slot resource R ”i (e.g., containing Ni consecutive resources or slots) for a third multiple consecutive transmission occasions for a second HARQ retransmission of TB z, wherein each resource or slot of the second multi-slot resource R ) has a minimum time gap (preconfigured or configured for HARQ process time) from each respective resource or slot of the first multi-slot resource Ri and each resource or slot of the third multislot resource R ”i has the minimum time gap (preconfigured or configured for HARQ process time) from each respective resource or slot of the second multi-slot resource R ), from a joint set of resources that includes a multi-slot candidate resource set SA and a shared remaining resource set SB (if there are any remaining resources shared by another sidelink process). In addition, the MAC layer may update the shared remaining resource set SB by removing the selected one or more resources from the remaining resource set SB from the remaining resource set SB, and the (re-)selected resources may be (re-)assigned or (re-)associated to the sidelink grant for TB z (e.g., SLgrant i for TB z).

[0117] As further shown in Fig. 8, at block 830, a HARQ entity may then associate the sidelink grant with a sidelink process for TB z (e.g., sidelink HARQ process SLprocess i for TB z). In some aspects, at block 840, the HARQ entity may check the remaining resource set SB(e.g., for resource re-evaluation at a time interval before an initial transmission) and add one or more remaining resources that are available in the remaining resource set SB, if any, to the sidelink grant associated with TB i (e.g., one or more remaining resources that are transferred after the resource (re-)selection due to a time difference (At) between the previous TB (e.g., TB i-1) triggering resource (re-)selection and the current TB (e.g., TB z) triggering resource (re-election). Furthermore, the HARQ entity may reassociate the updated or re-evaluated sidelink grant with the sidelink process for TB i (e.g., SLprocess i for TB z) and remove the selected resources from the remaining resource set SB. Otherwise, in cases where there are no remaining resources available, the HARQ entity does not need to update the sidelink grant (e.g., no update at the resource re-evaluation). Furthermore, in some aspects, the HARQ entity may construct or generate a PSCCH and PSSCH transmission at a PSCCH and PSSCH duration based on the resources or slots in the sidelink grant (e.g., starting from the earliest resource or slot within the sidelink grant) for the current TB (e.g., PSCCH / PSSCH i for TB z).

[0118] As further shown in Fig. 8, at block 850, the HARQ entity may instruct a PHY layer to transmit the PSCCH and PSSCH for the current TB according to the multiple consecutive initial transmission occasions (e.g., multiple consecutive LBT occasions) based on the PSCCH / PSSCH duration(s) associated respectively with the resources or slots included in the sidelink grant (e.g., LBT occasions with k = 1 ~ K, where K >Ni for TB i, including the resources taken from the remaining resource set &). At block 860, the PHY layer may attempt an LBT procedure at an LBT occasion (e.g., at the kth LBT occasion where k = 1 ~ K). As shown in Fig. 8, in cases where the attempted LBT procedure is not successful, the PHY layer may report an LBT failure to the MAC layer and process 800 may return to block 850 to use the reserved resource within the sidelink grant for the current TB (e.g., SLgrant i for TB z) for a next LBT occasion (e.g., a (k+l)th occasion). In cases where the LBT procedure fails at the last LBT occasion (e.g., at the Kth occasion), the PHY layer may report the LBT failure to the MAC layer, and process 800 may return to block 820 to reselect new resources for subsequent LBT occasions. Alternatively, when an attempted LBT procedure is successful, the PHY layer may report the successful LBT procedure to the MAC layer and process 800 may advance to block 870.

[0119] For example, as further shown in Fig. 8, at block 870, the HARQ entity may add the remaining resource(s), if any, to the remaining resource set SBand clear the PSCCH / PSSCH duration(s) in the sidelink grant for the current TB (e.g., SLgrant i for TB z). Furthermore, the HARQ entity may reassociate the updated sidelink grant with the sidelink process for the current TB (e.g., SLprocess i for TB z). As further shown in Fig. 8, at block 880, the HARQ entity may then determine that a retransmission of the current TB is needed (e.g., based on if blind retransmission is enabled or not or based on HARQ feedback for the current TB if enabled). For example, in cases where a retransmission of the current TB is needed (e.g., basedon blind retransmission, or HARQ NACK feedback or no HARQ feedback for the current transmission of the TB), process 800 may return to block 840, where the HARQ entity constructs or generates a PSCCH and PSSCH retransmission using the reserved resources in the sidelink grant for the current TB (e.g., resources reserved in the SLgrant i for retransmitting TB z). Alternatively, process 800 may return to block 820 for reserving new resources for the sidelink grant associated with the sidelink process (e.g., SLprocess i for TB z) if more resources are needed for retransmissions. Otherwise, if the HARQ entity determines that a retransmission of the current TB is not needed, process 800 may be stopped with the sidelink grant cleared and the associated sidelink process cleared.

[0120] Although Fig. 8 shows example blocks of process 800, in some aspects, process 800 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 8. Additionally, or alternatively, two or more of the blocks of process 800 may be performed in parallel.

[0121] Figs. 9A-9B are diagrams illustrating examples 900 associated with resource selection for MCSt for SL-U based on a single-slot candidate resource set including one or more single slot resources, in accordance with the present disclosure. For example, as described herein, examples 900 relate to resource selection techniques that may be used to ensure contiguous slot transmissions using an MCSt technique that provides best effort to achieve MCSt for multiple TBs.

[0122] For example, in some aspects, examples 900 relate to MCSt resource selection techniques that may be used when a higher (e.g., MAC) layer triggers LI candidate resource selection for one TB with one set of parameters (e.g., a transmission priority, prioTX, a remaining PDB, a number of logical subchannels, fsl,bcn- and / or a reservation periodicity PrsVp TX)- Insuch cases, the PHY layer may report a set of candidate single-slot resources, SA, to the MAC layer, where each candidate single-slot resource included in the set of candidate single-slot resources comprises a single slot that is available to reserve for a first TB associated with a first sidelink grant. Accordingly, the higher (e.g., MAC) layer may then select a set of resources, Ri, either randomly or according to one or more consecutive slots criteria (e.g., selecting the earliest resource or slot), and the selected set of resources, Ri, may be associated with the first sidelink grant which then may be associated with a sidelink process for the first TB. For example, in some aspects, the MAC layer may select, from a set of candidate singleslot resources reported by the PHY layer, a set of resources, Ri, for an initial transmission of a first TB associated with a first sidelink grant and one or more retransmissions of the first TB. For example, the set of resources selected by the MAC layer, Ri, may include resource rn through resource rmi, where resource rn is for the initial transmission of the first TB and resources r through resource run are for the retransmission(s) of the first TB (e.g., for blindretransmission if enabled or for HARQ retransmission if enabled). The HARQ entity then associates the selected resources, Ri, with a sidelink process for the first TB, and the selected resources, Ri, are indicated in a selected resource set, Sc, as shown by reference numbers 910 and 912. Accordingly, when a MAC layer performs resource selection or reselection for a second TB associated with a second sidelink grant, the MAC layer may check or reference the selected resource set. Sc, for the second sidelink grant associated with the second TB. For example, as illustrated in Fig. 9A, the set of single-slot candidate resources that are selected for a first sidelink grant associated with a first TB may include resources Rn rn, rn, rn, where resource rn is for the initial transmission of the first TB and rn and rn are for one or more retransmissions of the first TB. As further shown in Fig. 9A, the set of single-slot candidate resources that are selected for the first sidelink grant may be indicated in the shared selected resource set Sc . Accordingly, as shown by reference number 914, the MAC layer may check or reference the shared selected resource set Sc during resource selection or resource reselection (e.g., as shown by the reference number 916) or resource re-evaluation (e.g., as shown by the reference number 918) for a second sidelink grant associated with a second TB (e.g., the selected set of resources Rc includes resources rci, rn and rn, where resource rn is for the initial transmission of the second TB and consecutively follows resource rn if possible, resource r^is for a first retransmission of the second TB and consecutively follows resource rn if possible, and resource rn is for a second retransmission of the second TB and consecutively follows resource r if possible). Additionally, or alternatively, the selected or updated / re-evaluated resources, R?, included in the second sidelink associated with the second TB may further be indicated in the selected resource set, Sc, as shown by reference numbers 920, which may be checked or referenced by the MAC process for another TB (e.g., a third TB). In some aspects, the new resources may overwrite the previous resources indicated in the selected resource set Sc (e.g., the resources of the second TB may overwrite the resources of the first TB in the selected resource set Sc.

[0123] In some aspects, Fig. 9B illustrates example scenarios for the resource indication depending on whether blind retransmissions or HARQ-based retransmissions are configured for the first TB and the second TB. For example, as shown in Fig. 9B, and by reference number 920, a set of resources that are selected for a first TB, Ri, may include ml + 1 slots in cases where ml blind retransmissions are configured for the first TB. Accordingly, as shown in Fig. 9B, a successful LBT procedure is performed at (e.g., just prior to or during a contention window associated with) resource rn, which is followed by an initial transmission of the first TB in resource rn. As further shown in Fig. 9B, the initial transmission of the first TB is followed by ml blind retransmissions of the first TB in resource r through resource rimm, where ml is an integer having a value equal to or greater than 1 (preconfigured or configured). Accordingly, as shown by reference number 922, a set of resources that are selected for asecond TB, R2, may include m2 + 1 slots in cases where m2 blind retransmissions are configured for the second TB, where the set of resources that are selected for the second TB may be based on the set of resources that are selected for the first TB. For example, as shown, the set of resources that are selected for the second TB may be selected to be adjacent to the corresponding resources in the set of resources that are selected for the first TB (e.g., resource r2iis selected to be adjacent to resource r!m! 1). In this way, the resource selection for the second TB may be performed to ensure that the resources that are independently selected for different TBs are contiguous when blind retransmissions are configured (e.g., as shown by reference number 924).

[0124] Additionally, or alternatively, as shown by reference number 930, a set of resources that are selected for a first TB, R>. may include non-contiguous resources (e.g., with the minimum time gap preconfigured or configured for HARQ process) in cases where HARQ- based retransmissions are configured for the first TB. Accordingly, as shown in Fig. 9B, the resources that are selected for the first TB, Ri, include resources rn. n2, rn, ... , / ' / v. where resource rn is for an initial transmission of the first TB and resource r is for an A h retransmission of the first TB. Furthermore, as shown in Fig. 9B, the resources rn, ri2, rn, ... , rm included in Ri are separated in time by a minimum time gap for a HARQ process associated with the first TB. Accordingly, the resources that are selected for the first TB, Ri, may be indicated to the shared selected resource set Sc which may be checked or referenced for resource selection or reselection by other MAC processes other TBs with other sidelink grants associated, such that resources that are independently selected by other MAC processes for other TBs may be contiguous with the resources that were selected for the first TB. For example, as shown by reference number 932, a set of resources that are selected for a second TB, R2, includes resources r2>. r22, r23. ..., r , where resource r2> is for an initial transmission of the second TB and contiguously follows resource rn for the initial transmission of the first TB, and resource rm is for an Ath retransmission of the second TB and contiguously follows resource rm for the Ath retransmission of the first TB. Furthermore, a similar process may be repeated for any additional TBs. For example, the resources that are selected for the second TB, R2, may be indicated to the shared selected resource set Sc (e.g., overwriting the indication of Ri) for a third TB associated with a third sidelink grant, whereby the MAC process of the third TB may check or reference R2when performing resource selection or reselection for the third TB. For example, as shown by reference number 934, a set of resources that are selected for the third TB, R3. includes resources r3i, r32. r33. ... , rm, where resource r3!is for an initial transmission of the third TB and contiguously follows resource r2!for the initial transmission of the second TB, and resource rm is for an Ath retransmission of the third TB and contiguously follows resource r for the Ath retransmission of the second TB. In this way, the resource selection for multiple TBs may be performed to ensure that the resources that are independently selected for the TBsare contiguous with initial transmissions or HARQ transmissions (e.g., as shown by reference number 936).

[0125] As indicated above, Figs. 9A-9B are provided as examples. Other examples may differ from what is described with regard to Figs. 9A-9B.

[0126] Fig. 10 is a diagram illustrating an example process 1000 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1000 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with resource selection for MCSt for SL-U.

[0127] As shown in Fig. 10, in some aspects, process 1000 may include selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first side link grant (block 1010). For example, the UE (e.g., using communication manager 1106, depicted in Fig. 11) may select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first side link grant, as described above.

[0128] As further shown in Fig. 10, in some aspects, process 1000 may include determining a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant (block 1020). For example, the UE (e.g., using communication manager 1106, depicted in Fig. 11) may determine a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant, as described above.

[0129] As further shown in Fig. 10, in some aspects, process 1000 may include selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant (block 1030). For example, the UE (e.g., using communication manager 1106, depicted in Fig. 11) may select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant, as described above.

[0130] As further shown in Fig. 10, in some aspects, process 1000 may include transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions (block 1040). For example, the UE (e.g., using transmission component 1104 and / or communication manager 1106, depicted in Fig. 11) may transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions, as described above.

[0131] As further shown in Fig. 10, in some aspects, process 1000 may include transmitting the second TB with one or more transmissions in the one or more transmission occasions (block1050). For example, the UE (e.g., using transmission component 1104 and / or communication manager 1106, depicted in Fig. 11) may transmit the second TB with one or more transmissions in the one or more transmission occasions, as described above.

[0132] Process 1000 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.

[0133] In a first aspect, process 1000 includes removing the remaining resource set from the first sidelink grant associated with the first TB.

[0134] In a second aspect, alone or in combination with the first aspect, the first resource set contains a first candidate resource set associated with the first TB.

[0135] In a third aspect, alone or in combination with one or more of the first and second aspects, the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

[0136] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the second resource set includes continuously a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

[0137] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

[0138] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the second resource set includes continuously the remaining resource set, and the second candidate resource set of the second TB.

[0139] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

[0140] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the second resource set includes discontinuously the remaining resource set, and the second candidate resource set of the second TB.

[0141] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

[0142] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB responsive to HARQ retransmission being configured for the first TB.

[0143] Although Fig. 10 shows example blocks of process 1000, in some aspects, process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.

[0144] Fig. 11 is a diagram of an example apparatus 1100 for wireless communication, in accordance with the present disclosure. The apparatus 1100 may be a UE, or a UE may include the apparatus 1100. In some aspects, the apparatus 1100 includes a reception component 1102, a transmission component 1104, and / or a communication manager 1106, which may be in communication with one another (for example, via one or more buses and / or one or more other components). In some aspects, the communication manager 1106 is the communication manager 140 described in connection with Fig. 1. As shown, the apparatus 1100 may communicate with another apparatus 1108, such as a UE or a network node (such as a CU, a DU, an RU, or a base station), using the reception component 1102 and the transmission component 1104.

[0145] In some aspects, the apparatus 1100 may be configured to perform one or more operations described herein in connection with Figs. 7A-7D, Fig. 8, and / or Figs. 9A-9B. Additionally, or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as process 1000 of Fig. 10. In some aspects, the apparatus 1100 and / or one or more components shown in Fig. 11 may include one or more components of the UE described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 11 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.

[0146] The reception component 1102 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1108. The reception component 1102 may provide received communications to one or more other components of the apparatus 1100. In some aspects, the reception component 1102 may perform signal processing on the received communications (such as fdtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples), and may provide the processed signals to the one or more other components of the apparatus 1100. In some aspects, the reception component 1102 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2.

[0147] The transmission component 1104 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1108. In some aspects, one or more other components of the apparatus 1100 may generate communications and may provide the generated communications to the transmission component 1104 for transmission to the apparatus 1108. In some aspects, the transmission component 1104 may perform signal processing on the generated communications (such as fdtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples), and may transmit the processed signals to the apparatus 1108. In some aspects, the transmission component 1104 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 1104 may be co-located with the reception component 1102 in one or more transceivers.

[0148] The communication manager 1106 may support operations of the reception component 1102 and / or the transmission component 1104. For example, the communication manager 1106 may receive information associated with configuring reception of communications by the reception component 1102 and / or transmission of communications by the transmission component 1104. Additionally, or alternatively, the communication manager 1106 may generate and / or provide control information to the reception component 1102 and / or the transmission component 1104 to control reception and / or transmission of communications.

[0149] The communication manager 1106 may select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant. The communication manager 1106 may determine a remaining resource set after a successful LBT procedure based on the multiple continuoustransmission occasions associated with the first TB associated with the first sidelink grant. The communication manager 1106 may select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant. The transmission component 1104 may transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions. The transmission component 1104 may transmit the second TB with one or more transmissions in the one or more transmission occasions.

[0150] The number and arrangement of components shown in Fig. 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 11. Furthermore, two or more components shown in Fig. 11 may be implemented within a single component, or a single component shown in Fig. 11 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 11 may perform one or more functions described as being performed by another set of components shown in Fig. 11.

[0151] The following provides an overview of some Aspects of the present disclosure:

[0152] Aspect 1 : A method of wireless communication performed by a UE, comprising: selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first TB associated with a first sidelink grant; determining a remaining resource set after a successful LBT procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and transmitting the second TB with one or more transmissions in the one or more transmission occasions.

[0153] Aspect 2: The method of Aspect 1, further comprising: removing the remaining resource set from the first sidelink grant associated with the first TB.

[0154] Aspect 3: The method of any of Aspects 1-2, wherein the first resource set contains a first candidate resource set associated with the first TB.

[0155] Aspect 4: The method of any of Aspects 1-3, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

[0156] Aspect 5: The method of Aspect 4, wherein the second resource set includes continuously: a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

[0157] Aspect 6: The method of any of Aspects 1-5, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

[0158] Aspect 7: The method of Aspect 6, wherein the second resource set includes continuously: the remaining resource set, and the second candidate resource set of the second TB.

[0159] Aspect 8: The method of any of Aspects 1-7, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

[0160] Aspect 9: The method of Aspect 8, wherein the second resource set includes discontinuously: the remaining resource set, and the second candidate resource set of the second TB.

[0161] Aspect 10: The method of any of Aspects 1-9, wherein the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

[0162] Aspect 11 : The method of any of Aspects 1-10, wherein the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB responsive to HARQ retransmission being configured for the first TB.

[0163] Aspect 12: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-11.

[0164] Aspect 13: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-11.

[0165] Aspect 14: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-11.

[0166] Aspect 15: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-11.

[0167] Aspect 16: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-11.

[0168] Aspect 17: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-11.

[0169] Aspect 18: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-11.

[0170] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects.

[0171] As used herein, the term “component” is intended to be broadly construed as hardware and / or a combination of hardware and software. “Software” shall be construed broadly 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 may 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 are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.

[0172] The hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single- or multi-chip processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor also may be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In some aspects, particular processes and methods may be performed by circuitry that is specific to a given function.

[0173] As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.

[0174] Even though particular combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. 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 with multiples of the same element (e.g., a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c).

[0175] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B). Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or”is intended to be inclusive when used in a series and may be used interchangeably with “and / or,” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of’).

Claims

WHAT IS CLAIMED IS:

1. A user equipment (UE) for wireless communication, comprising: one or more memories; and one or more processors, coupled to the one or more memories, configured to cause the UE to: select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB) associated with a first sidelink grant; determine a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and transmit the second TB with one or more transmissions in the one or more transmission occasions.

2. The UE of claim 1, wherein the one or more processors are further configured to cause the UE to: remove the remaining resource set from the first sidelink grant associated with the first TB.

3. The UE of claim 1, wherein the first resource set contains a first candidate resource set associated with the first TB.

4. The UE of claim 1, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

5. The UE of claim 4, wherein the second resource set includes continuously: a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

6. The UE of claim 1, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

7. The UE of claim 6, wherein the second resource set includes continuously: the remaining resource set, and the second candidate resource set of the second TB.

8. The UE of claim 1, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

9. The UE of claim 8, wherein the second resource set includes discontinuously: the remaining resource set, and the second candidate resource set of the second TB.

10. The UE of claim 1, wherein the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

11. The UE of claim 1, wherein the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB responsive to hybrid automatic repeat request (HARQ) retransmission being configured for the first TB.

12. A method of wireless communication performed by a user equipment (UE), comprising: selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB) associated with a first sidelink grant; determining a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant;selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and transmitting the second TB with one or more transmissions in the one or more transmission occasions.

13. The method of claim 12, further comprising: removing the remaining resource set from the first sidelink grant associated with the first TB.

14. The method of claim 12, wherein the first resource set contains a first candidate resource set associated with the first TB.

15. The method of claim 12, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

16. The method of claim 15, wherein the second resource set includes continuously: a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

17. The method of claim 12, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

18. The method of claim 17, wherein the second resource set includes continuously: the remaining resource set, and the second candidate resource set of the second TB.

19. The method of claim 12, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the secondcandidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

20. The method of claim 19, wherein the second resource set includes discontinuously: the remaining resource set, and the second candidate resource set of the second TB.

21. The method of claim 12, wherein the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

22. The method of claim 12, wherein the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB responsive to hybrid automatic repeat request (HARQ) retransmission being configured for the first TB.

23. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising: one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to: select, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB) associated with a first sidelink grant; determine a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; select, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; transmit, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and transmit the second TB with one or more transmissions in the one or more transmission occasions.

24. The non-transitory computer-readable medium of claim 23, wherein the one or more instructions further cause the UE to: remove the remaining resource set from the first sidelink grant associated with the first TB.

25. The non-transitory computer-readable medium of claim 23, wherein the first resource set contains a first candidate resource set associated with the first TB.

26. The non-transitory computer-readable medium of claim 23, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

27. The non-transitory computer-readable medium of claim 26, wherein the second resource set includes continuously: a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

28. The non-transitory computer-readable medium of claim 23, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

29. The non-transitory computer-readable medium of claim 28, wherein the second resource set includes continuously: the remaining resource set, and the second candidate resource set of the second TB.

30. The non-transitory computer-readable medium of claim 23, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

31. The non-transitory computer-readable medium of claim 30, wherein the second resource set includes discontinuously:the remaining resource set, and the second candidate resource set of the second TB.

32. The non-transitory computer-readable medium of claim 23, wherein the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

33. The non-transitory computer-readable medium of claim 23, wherein the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB responsive to hybrid automatic repeat request (HARQ) retransmission being configured for the first TB.

34. An apparatus for wireless communication, comprising: means for selecting, from a first resource set, multiple continuous resources for multiple continuous transmission occasions associated with a first transport block (TB) associated with a first sidelink grant; means for determining a remaining resource set after a successful listen-before-talk (LBT) procedure based on the multiple continuous transmission occasions associated with the first TB associated with the first sidelink grant; means for selecting, from a second resource set and based on the remaining resource set, one or more resources for one or more transmission occasions associated with a second TB associated with a second sidelink grant; means for transmitting, responsive to the successful LBT procedure, the first TB with one or more transmissions in the multiple continuous transmission occasions; and means for transmitting the second TB with one or more transmissions in the one or more transmission occasions.

35. The apparatus of claim 34, further comprising: means for removing the remaining resource set from the first sidelink grant associated with the first TB.

36. The apparatus of claim 34, wherein the first resource set contains a first candidate resource set associated with the first TB.

37. The apparatus of claim 34, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB overlaps with the remaining resource set based on a time difference between the first TB and the second TB.

38. The apparatus of claim 37, wherein the second resource set includes continuously: a subset of the remaining resource set that does not overlap with the second candidate resource set of the second TB, and the second candidate resource set of the second TB.

39. The apparatus of claim 34, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining resource set without a time gap based on a time difference between the first TB and the second TB.

40. The apparatus of claim 39, wherein the second resource set includes continuously: the remaining resource set, and the second candidate resource set of the second TB.

41. The apparatus of claim 34, wherein the second resource set is associated with a second candidate resource set of the second TB and the remaining resource set, where the second candidate resource set of the second TB follows the remaining set with a time gap based on a time difference between the first TB and the second TB.

42. The apparatus of claim 41, wherein the second resource set includes discontinuously: the remaining resource set, and the second candidate resource set of the second TB.

43. The apparatus of claim 34, wherein the remaining resource set follows resources used for transmitting the first TB with the one or more transmissions, where the one or more transmissions of the first TB include an initial transmission of the first TB and one or more blind retransmissions of the first TB responsive to blind retransmission being configured for the first TB.

44. The apparatus of claim 34, wherein the remaining resource set follows resources used for transmitting the first TB with one or more transmissions, where the one or moretransmissions of the first TB include an initial transmission of the first TB responsive to hybrid automatic repeat request (HARQ) retransmission being configured for the first TB.

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