WO2025118213A1

WO2025118213A1 - Techniques for resource selection for sidelink communication

Info

Publication number: WO2025118213A1
Application number: PCT/CN2023/136970
Authority: WO
Inventors: Luanxia YANG; Changlong Xu; Shaozhen GUO; Siyi Chen; Xiaoxia Zhang; Chih-Hao Liu; Jing Sun; Hao Xu
Original assignee: Qualcomm Inc
Current assignee: Qualcomm Inc
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2025-06-12
Anticipated expiration: 2026-06-07

Abstract

Methods, systems, and devices for wireless communications are described. Techniques described provide for resource selection for sidelink. The first UE may receive control signaling that indicates a second set of resources reserved by a second UE. The first UE may transmit a sidelink message in a first set of resources based on a LBT blocking configuration. The first set of resources may be associated with a channel occupancy time. The LBT blocking configuration may indicate which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration may indicate an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

Description

TECHNIQUES FOR RESOURCE SELECTION FOR SIDELINK COMMUNICATION

FIELD OF TECHNOLOGY

The following relates to wireless communications, including techniques for resource selection for sidelink communication.

BACKGROUND

Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) .

SUMMARY

The described techniques relate to improved methods, systems, devices, and apparatuses that support techniques for resource selection for sidelink communication. For example, the described techniques provide for a first user equipment (UE) to address a Type 1 listen-before-talk (LBT) blocking by supporting both a first LBT blocking mode and a second LBT blocking mode. The first UE may receive, from the second UE, control signaling that indicates a second set of resources reserved by the second UE. The first UE may transmit a sidelink message in a first set of resources based on a LBT blocking configuration, and the first set of resources may be associated with a channel occupancy time (COT) . The first UE may be capable of supporting both a first LBT blocking mode and a second LBT blocking mode. The first set of resources may be offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode or the second set of resources may be within the COT in the second LBT blocking mode. The LBT blocking configuration may indicate which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration may indicate an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

A method for wireless communication by a first user UE is described. The method may include receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE and transmitting a sidelink message in a first set of resources based on a LBT blocking configuration, where the first set of resources are associated with a COT, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the COT in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

A first UE for wireless communication is described. The first UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively operable to execute the code to cause the first UE to receive, from a second UE, control signaling that indicates a second set of resources reserved by the second UE and transmit a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a COT, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the COT in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

Another first UE for wireless communication is described. The first UE may include means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE and means for transmitting a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a COT, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the COT in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

A non-transitory computer-readable medium storing code for wireless communication is described. The code may include instructions executable by one or more processors to receive, from a second UE, control signaling that indicates a second set of resources reserved by the second UE and transmit a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a COT, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the COT in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

In some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein, the LBT blocking configuration indicates the second LBT blocking mode may be enabled.

In some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein, the LBT blocking configuration indicates the evaluation order as the second LBT blocking mode then the first LBT blocking mode.

In some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein, the LBT blocking configuration indicates the evaluation order as the first LBT blocking mode then the second LBT blocking mode.

In some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein, the first LBT blocking mode may be a Type 1 LBT blocking Option 1.

In some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein, the second LBT blocking mode may be a Type 1 LBT blocking Option 2.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT being higher than a lowest priority value of a set first priority values associated with the first set of resources.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT being higher than a highest priority value of a set first priority values associated with the first set of resources.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in the COT.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on a quantity of consecutive transmission time intervals of the second set of resources located in of the COT being greater than or equal to a threshold.

Some examples of the method, first user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for transmitting, to the second UE based on receiving the control signaling, a COT sharing indicator based on a portion of consecutive transmission time intervals of the second set of resources located in the COT being greater than or equal to a threshold.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows an example of a wireless communications system that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 2 shows an example of a wireless communications system that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 3 shows an example of a resource diagram that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 4 shows an example of a resource diagram that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 5 shows an example of a process flow that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIGs. 6 and 7 show block diagrams of devices that support techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 8 shows a block diagram of a communications manager that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIG. 9 shows a diagram of a system including a device that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

FIGs. 10 through 12 show flowcharts illustrating methods that support techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure.

DETAILED DESCRIPTION

In some wireless communications systems, a first user equipment (UE) and a second UE may communicate using sidelink communications. A UE may select resources for sidelink communication based on sensing performed by the UE which is referred to as mode 2. Resource selection may include identification of candidate resources by sensing and exclusion and may include selection of the candidate resources from the identified resources. When the first UE selects a resource for a transmission by the first UE, the first UE may consider whether the resource has been reserved for a future retransmission by the second UE. The second UE may transmit control signaling to the first UE indicating resources that the second UE is reserving for the future retransmission by the second UE. The first UE may select resources based on the reservation information for the future retransmission of the second UE. Prior to transmitting using the selected resources, the first UE may perform a Type 1 listen-before-talk (LBT) procedure to obtain channel access and a channel occupancy time (COT) for the sidelink transmission. In some cases, a Type 1 LBT inter-UE blocking may exist where a transmission from the first UE is blocking the LBT sensing of the second UE. To address the Type 1 LBT blocking, the first UE may avoid selection of a quantity of resources before the reserved resources of the second UE or the first UE may share the COT.

The first UE may address the Type 1 LBT blocking issue by supporting both a first LBT blocking mode and a second LBT blocking mode. An LBT blocking mode may coordinate when LBT is performed to avoid blocking of LBTs or transmissions on resources reserved by other UEs. In some examples, the first UE may receive, from the second UE, control signaling that indicates a second set of resources reserved by the second UE. The first UE may transmit a sidelink message in a first set of resources based on a LBT blocking configuration, and the first set of resources may be associated with a COT. The first set of resources may be offset in time by a quantity of consecutive resources relative to the second set of resources in a first LBT blocking mode or the second set of resources may be within the COT in the second LBT blocking mode. With the first blocking mode, the first UE may determine whether the selected resource has enough time offset relative to the second set of resources to let the second UE enough time to perform LBT. The LBT blocking configuration may indicate which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration may indicate an evaluation order of the first LBT blocking mode and the second LBT blocking mode. In some cases, for the second LBT blocking mode, the first UE may transmit a COT sharing indicator based on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT. In some cases, for the second LBT blocking mode, the first UE may transmit a COT sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in the COT.

Aspects of the disclosure are initially described in the context of wireless communications systems. Aspects of the disclosure are further illustrated by and described with reference to a wireless communications system, resource diagrams, and a process flow. Aspects of the disclosure are further illustrated by and described with reference to apparatus diagrams, system diagrams, and flowcharts that relate to techniques for resource selection for sidelink communication.

FIG. 1 shows an example of a wireless communications system 100 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 105, one or more UEs 115, and a core network 130. In some examples, the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, a New Radio (NR) network, or a network operating in accordance with other systems and radio technologies, including future systems and radio technologies not explicitly mentioned herein.

The network entities 105 may be dispersed throughout a geographic area to form the wireless communications system 100 and may include devices in different forms or having different capabilities. In various examples, a network entity 105 may be referred to as a network element, a mobility element, a radio access network (RAN) node, or network equipment, among other nomenclature. In some examples, network entities 105 and UEs 115 may wirelessly communicate via one or more communication links 125 (e.g., a radio frequency (RF) access link) . For example, a network entity 105 may support a coverage area 110 (e.g., a geographic coverage area) over which the UEs 115 and the network entity 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which a network entity 105 and a UE 115 may support the communication of signals according to one or more radio access technologies (RATs) .

The UEs 115 may be dispersed throughout a coverage area 110 of the wireless communications system 100, and each UE 115 may be stationary, or mobile, or both at different times. The UEs 115 may be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of supporting communications with various types of devices, such as other UEs 115 or network entities 105, as shown in FIG. 1.

As described herein, a node of the wireless communications system 100, which may be referred to as a network node, or a wireless node, may be a network entity 105 (e.g., any network entity described herein) , a UE 115 (e.g., any UE described herein) , a network controller, an apparatus, a device, a computing system, one or more components, or another suitable processing entity configured to perform any of the techniques described herein. For example, a node may be a UE 115. As another example, a node may be a network entity 105. As another example, a first node may be configured to communicate with a second node or a third node. In one aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a UE 115. In another aspect of this example, the first node may be a UE 115, the second node may be a network entity 105, and the third node may be a network entity 105. In yet other aspects of this example, the first, second, and third nodes may be different relative to these examples. Similarly, reference to a UE 115, network entity 105, apparatus, device, computing system, or the like may include disclosure of the UE 115, network entity 105, apparatus, device, computing system, or the like being a node. For example, disclosure that a UE 115 is configured to receive information from a network entity 105 also discloses that a first node is configured to receive information from a second node.

In some examples, network entities 105 may communicate with the core network 130, or with one another, or both. For example, network entities 105 may communicate with the core network 130 via one or more backhaul communication links 120 (e.g., in accordance with an S1, N2, N3, or other interface protocol) . In some examples, network entities 105 may communicate with one another via a backhaul communication link 120 (e.g., in accordance with an X2, Xn, or other interface protocol) either directly (e.g., directly between network entities 105) or indirectly (e.g., via a core network 130) . In some examples, network entities 105 may communicate with one another via a midhaul communication link 162 (e.g., in accordance with a midhaul interface protocol) or a fronthaul communication link 168 (e.g., in accordance with a fronthaul interface protocol) , or any combination thereof. The backhaul communication links 120, midhaul communication links 162, or fronthaul communication links 168 may be or include one or more wired links (e.g., an electrical link, an optical fiber link) , one or more wireless links (e.g., a radio link, a wireless optical link) , among other examples or various combinations thereof. A UE 115 may communicate with the core network 130 via a communication link 155.

One or more of the network entities 105 described herein may include or may be referred to as a base station 140 (e.g., a base transceiver station, a radio base station, an NR base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB) , a next-generation NodeB or a giga-NodeB (either of which may be referred to as a gNB) , a 5G NB, a next-generation eNB (ng-eNB) , a Home NodeB, a Home eNodeB, or other suitable terminology) . In some examples, a network entity 105 (e.g., a base station 140) may be implemented in an aggregated (e.g., monolithic, standalone) base station architecture, which may be configured to utilize a protocol stack that is physically or logically integrated within a single network entity 105 (e.g., a single RAN node, such as a base station 140) .

In some examples, a network entity 105 may be implemented in a disaggregated architecture (e.g., a disaggregated base station architecture, a disaggregated RAN architecture) , which may be configured to utilize a protocol stack that is physically or logically distributed among two or more network entities 105, such as an integrated access backhaul (IAB) network, an open RAN (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 105 may include one or more of a central unit (CU) 160, a distributed unit (DU) 165, a radio unit (RU) 170, a RAN Intelligent Controller (RIC) 175 (e.g., a Near-Real Time RIC (Near-RT RIC) , a Non-Real Time RIC (Non-RT RIC) ) , a Service Management and Orchestration (SMO) 180 system, or any combination thereof. An RU 170 may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 105 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 105 may be located in distributed locations (e.g., separate physical locations) . In some examples, one or more network entities 105 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .

The split of functionality between a CU 160, a DU 165, and an RU 170 is flexible and may support different functionalities depending on which functions (e.g., network layer functions, protocol layer functions, baseband functions, RF functions, and any combinations thereof) are performed at a CU 160, a DU 165, or an RU 170. For example, a functional split of a protocol stack may be employed between a CU 160 and a DU 165 such that the CU 160 may support one or more layers of the protocol stack and the DU 165 may support one or more different layers of the protocol stack. In some examples, the CU 160 may host upper protocol layer (e.g., layer 3 (L3) , layer 2 (L2) ) functionality and signaling (e.g., Radio Resource Control (RRC) , service data adaption protocol (SDAP) , Packet Data Convergence Protocol (PDCP) ) . The CU 160 may be connected to one or more DUs 165 or RUs 170, and the one or more DUs 165 or RUs 170 may host lower protocol layers, such as layer 1 (L1) (e.g., physical (PHY) layer) or L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160. Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU 165 and an RU 170 such that the DU 165 may support one or more layers of the protocol stack and the RU 170 may support one or more different layers of the protocol stack. The DU 165 may support one or multiple different cells (e.g., via one or more RUs 170) . In some cases, a functional split between a CU 160 and a DU 165, or between a DU 165 and an RU 170 may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU 160, a DU 165, or an RU 170, while other functions of the protocol layer are performed by a different one of the CU 160, the DU 165, or the RU 170) . A CU 160 may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU 160 may be connected to one or more DUs 165 via a midhaul communication link 162 (e.g., F1, F1-c, F1-u) , and a DU 165 may be connected to one or more RUs 170 via a fronthaul communication link 168 (e.g., open fronthaul (FH) interface) . In some examples, a midhaul communication link 162 or a fronthaul communication link 168 may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 105 that are in communication via such communication links.

In wireless communications systems (e.g., wireless communications system 100) , infrastructure and spectral resources for radio access may support wireless backhaul link capabilities to supplement wired backhaul connections, providing an IAB network architecture (e.g., to a core network 130) . In some cases, in an IAB network, one or more network entities 105 (e.g., IAB nodes 104) may be partially controlled by each other. One or more IAB nodes 104 may be referred to as a donor entity or an IAB donor. One or more DUs 165 or one or more RUs 170 may be partially controlled by one or more CUs 160 associated with a donor network entity 105 (e.g., a donor base station 140) . The one or more donor network entities 105 (e.g., IAB donors) may be in communication with one or more additional network entities 105 (e.g., IAB nodes 104) via supported access and backhaul links (e.g., backhaul communication links 120) . IAB nodes 104 may include an IAB mobile termination (IAB-MT) controlled (e.g., scheduled) by DUs 165 of a coupled IAB donor. An IAB-MT may include an independent set of antennas for relay of communications with UEs 115, or may share the same antennas (e.g., of an RU 170) of an IAB node 104 used for access via the DU 165 of the IAB node 104 (e.g., referred to as virtual IAB-MT (vIAB-MT) ) . In some examples, the IAB nodes 104 may include DUs 165 that support communication links with additional entities (e.g., IAB nodes 104, UEs 115) within the relay chain or configuration of the access network (e.g., downstream) . In such cases, one or more components of the disaggregated RAN architecture (e.g., one or more IAB nodes 104 or components of IAB nodes 104) may be configured to operate according to the techniques described herein.

In the case of the techniques described herein applied in the context of a disaggregated RAN architecture, one or more components of the disaggregated RAN architecture may be configured to support techniques for resource selection for sidelink communication as described herein. For example, some operations described as being performed by a UE 115 or a network entity 105 (e.g., a base station 140) may additionally, or alternatively, be performed by one or more components of the disaggregated RAN architecture (e.g., IAB nodes 104, DUs 165, CUs 160, RUs 170, RIC 175, SMO 180) .

A UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” may also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 may also include or may be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA) , a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which may be implemented in various objects such as appliances, or vehicles, meters, among other examples.

The UEs 115 described herein may be able to communicate with various types of devices, such as other UEs 115 that may sometimes act as relays as well as the network entities 105 and the network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, or relay base stations, among other examples, as shown in FIG. 1.

The UEs 115 and the network entities 105 may wirelessly communicate with one another via one or more communication links 125 (e.g., an access link) using resources associated with one or more carriers. The term “carrier” may refer to a set of RF spectrum resources having a defined physical layer structure for supporting the communication links 125. For example, a carrier used for a communication link 125 may include a portion of a RF spectrum band (e.g., a bandwidth part (BWP) ) that is operated according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR) . Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information) , control signaling that coordinates operation for the carrier, user data, or other signaling. The wireless communications system 100 may support communication with a UE 115 using carrier aggregation or multi-carrier operation. A UE 115 may be configured with multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used with both frequency division duplexing (FDD) and time division duplexing (TDD) component carriers. Communication between a network entity 105 and other devices may refer to communication between the devices and any portion (e.g., entity, sub-entity) of a network entity 105. For example, the terms “transmitting, ” “receiving, ” or “communicating, ” when referring to a network entity 105, may refer to any portion of a network entity 105 (e.g., a base station 140, a CU 160, a DU 165, a RU 170) of a RAN communicating with another device (e.g., directly or via one or more other network entities 105) .

Signal waveforms transmitted via a carrier may be made up of multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform spread OFDM (DFT-S-OFDM) ) . In a system employing MCM techniques, a resource element may refer to resources of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, in which case the symbol period and subcarrier spacing may be inversely related. The quantity of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the coding rate of the modulation scheme, or both) , such that a relatively higher quantity of resource elements (e.g., in a transmission duration) and a relatively higher order of a modulation scheme may correspond to a relatively higher rate of communication. A wireless communications resource may refer to a combination of an RF spectrum resource, a time resource, and a spatial resource (e.g., a spatial layer, a beam) , and the use of multiple spatial resources may increase the data rate or data integrity for communications with a UE 115.

The time intervals for the network entities 105 or the UEs 115 may be expressed in multiples of a basic time unit which may, for example, refer to a sampling period of T_s=1/ (Δf_max·N_f) seconds, for which Δf_max may represent a supported subcarrier spacing, and N_f may represent a supported discrete Fourier transform (DFT) size. Time intervals of a communications resource may be organized according to radio frames each having a specified duration (e.g., 10 milliseconds (ms) ) . Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023) .

Each frame may include multiple consecutively-numbered subframes or slots, and each subframe or slot may have the same duration. In some examples, a frame may be divided (e.g., in the time domain) into subframes, and each subframe may be further divided into a quantity of slots. Alternatively, each frame may include a variable quantity of slots, and the quantity of slots may depend on subcarrier spacing. Each slot may include a quantity of symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period) . In some wireless communications systems 100, a slot may further be divided into multiple mini-slots associated with one or more symbols. Excluding the cyclic prefix, each symbol period may be associated with one or more (e.g., N_f) sampling periods. The duration of a symbol period may depend on the subcarrier spacing or frequency band of operation.

A subframe, a slot, a mini-slot, or a symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communications system 100 and may be referred to as a transmission time interval (TTI) . In some examples, the TTI duration (e.g., a quantity of symbol periods in a TTI) may be variable. Additionally, or alternatively, the smallest scheduling unit of the wireless communications system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) ) .

Physical channels may be multiplexed for communication using a carrier according to various techniques. A physical control channel and a physical data channel may be multiplexed for signaling via a downlink carrier, for example, using one or more of time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET) ) for a physical control channel may be defined by a set of symbol periods and may extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESETs) may be configured for a set of the UEs 115. For example, one or more of the UEs 115 may monitor or search control regions for control information according to one or more search space sets, and each search space set may include one or multiple control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to an amount of control channel resources (e.g., control channel elements (CCEs) ) associated with encoded information for a control information format having a given payload size. Search space sets may include common search space sets configured for sending control information to multiple UEs 115 and UE-specific search space sets for sending control information to a specific UE 115.

In some examples, a network entity 105 (e.g., a base station 140, an RU 170) may be movable and therefore provide communication coverage for a moving coverage area 110. In some examples, different coverage areas 110 associated with different technologies may overlap, but the different coverage areas 110 may be supported by the same network entity 105. In some other examples, the overlapping coverage areas 110 associated with different technologies may be supported by different network entities 105. The wireless communications system 100 may include, for example, a heterogeneous network in which different types of the network entities 105 provide coverage for various coverage areas 110 using the same or different radio access technologies.

The wireless communications system 100 may be configured to support ultra-reliable communications or low-latency communications, or various combinations thereof. For example, the wireless communications system 100 may be configured to support ultra-reliable low-latency communications (URLLC) . The UEs 115 may be designed to support ultra-reliable, low-latency, or critical functions. Ultra-reliable communications may include private communication or group communication and may be supported by one or more services such as push-to-talk, video, or data. Support for ultra-reliable, low-latency functions may include prioritization of services, and such services may be used for public safety or general commercial applications. The terms ultra-reliable, low-latency, and ultra-reliable low-latency may be used interchangeably herein.

In some examples, a UE 115 may be configured to support communicating directly with other UEs 115 via a device-to-device (D2D) communication link 135 (e.g., in accordance with a peer-to-peer (P2P) , D2D, or sidelink protocol) . In some examples, one or more UEs 115 of a group that are performing D2D communications may be within the coverage area 110 of a network entity 105 (e.g., a base station 140, an RU 170) , which may support aspects of such D2D communications being configured by (e.g., scheduled by) the network entity 105. In some examples, one or more UEs 115 of such a group may be outside the coverage area 110 of a network entity 105 or may be otherwise unable to or not configured to receive transmissions from a network entity 105. In some examples, groups of the UEs 115 communicating via D2D communications may support a one-to-many (1: M) system in which each UE 115 transmits to each of the other UEs 115 in the group. In some examples, a network entity 105 may facilitate the scheduling of resources for D2D communications. In some other examples, D2D communications may be carried out between the UEs 115 without an involvement of a network entity 105.

The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or 5G core (5GC) , which may include at least one control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management function (AMF) ) and at least one user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . The control plane entity may manage non-access stratum (NAS) functions such as mobility, authentication, and bearer management for the UEs 115 served by the network entities 105 (e.g., base stations 140) associated with the core network 130. User IP packets may be transferred through the user plane entity, which may provide IP address allocation as well as other functions. The user plane entity may be connected to IP services 150 for one or more network operators. The IP services 150 may include access to the Internet, Intranet (s) , an IP Multimedia Subsystem (IMS) , or a Packet-Switched Streaming Service.

The wireless communications system 100 may operate using one or more frequency bands, which may be in the range of 300 megahertz (MHz) to 300 gigahertz (GHz) . Generally, the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from approximately one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features, which may be referred to as clusters, but the waves may penetrate structures sufficiently for a macro cell to provide service to the UEs 115 located indoors. Communications using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) compared to communications using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.

The wireless communications system 100 may utilize both licensed and unlicensed RF spectrum bands. For example, the wireless communications system 100 may employ License Assisted Access (LAA) , LTE-Unlicensed (LTE-U) radio access technology, or NR technology using an unlicensed band such as the 5 GHz industrial, scientific, and medical (ISM) band. While operating using unlicensed RF spectrum bands, devices such as the network entities 105 and the UEs 115 may employ carrier sensing for collision detection and avoidance. In some examples, operations using unlicensed bands may be based on a carrier aggregation configuration in conjunction with component carriers operating using a licensed band (e.g., LAA) . Operations using unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among other examples.

A network entity 105 (e.g., a base station 140, an RU 170) or a UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of a network entity 105 or a UE 115 may be located within one or more antenna arrays or antenna panels, which may support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some examples, antennas or antenna arrays associated with a network entity 105 may be located at diverse geographic locations. A network entity 105 may include an antenna array with a set of rows and columns of antenna ports that the network entity 105 may use to support beamforming of communications with a UE 115. Likewise, a UE 115 may include one or more antenna arrays that may support various MIMO or beamforming operations. Additionally, or alternatively, an antenna panel may support RF beamforming for a signal transmitted via an antenna port.

Beamforming, which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a network entity 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that some signals propagating along particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference. The adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude offsets, phase offsets, or both to signals carried via the antenna elements associated with the device. The adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation) .

In some wireless communications systems, a first UE (e.g., UE 115) and a second UE (e.g., UE 115) may communicate using sidelink communications. A UE may select resources for sidelink communication based on sensing performed by the UE which is referred to as mode 2. Resource selection may include identification of candidate resources by sensing and exclusion and may include selection of the candidate resources from the identified resources. When the first UE selects a resource for a transmission by the first UE, the first UE may consider whether the resource has been reserved for a future retransmission by the second UE. The second UE may transmit control signaling to the first UE indicating resources that the second UE is reserving for the future retransmission of the second UE. Prior to transmitting using the selected resources, the first UE may perform a Type 1 LBT procedure to obtain channel access and a COT for the sidelink transmission. The COT may refer to a length of time that the first UE has secured a sidelink channel for transmission as a result of performing the Type 1 LBT procedure to obtain channel access. In some cases, a Type 1 LBT inter-UE blocking may exist where a transmission from the first UE is blocking the LBT sensing of the second UE. To address the Type 1 LBT blocking, the first UE may avoid selection of a quantity of resources before the reserved resources of the second UE or the first UE may share the COT. In addition, the first UE may avoid to select the resource right after the reserved resource of the second UE as the second UE may block the LBT sensing of the first UE.

The first UE may address the Type 1 LBT blocking issue by supporting both a first LBT blocking mode and a second LBT blocking mode. An LBT blocking mode may coordinate when LBT is performed to avoid blocking of LBTs or transmissions on resources reserved by other UEs. In some examples, the first UE may receive, from the second UE, control signaling that indicates a second set of resources reserved by the second UE. The first UE may transmit a sidelink message in the first set of resources based on a LBT blocking configuration, and the first set of resources may be associated with a COT. The first set of resources may be offset in time by a quantity of consecutive resources relative to the second set of resources in a first LBT blocking mode or the second set of resources may be within the COT in the second LBT blocking mode. With the first LBT blocking mode, the first UE may determine whether the selected resource has enough time offset relative to the second set of resources to let the second UE enough time to perform LBT. The LBT blocking configuration may indicate which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration may indicate an evaluation order of the first LBT blocking mode and the second LBT blocking mode. In some cases, for the second LBT blocking mode, the first UE may transmit a COT sharing indicator based on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT. In some cases, for the second LBT blocking mode, the first UE may transmit a COT sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in the COT.

FIG. 2 shows an example of a wireless communications system 200 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. In some examples, the wireless communications system 200 may implement aspects of the wireless communications system 100. For example, the wireless communications system 200 may include a first UE 115-a and a second UE 115-b, which may be examples of a UE 115, as described herein with reference to FIG. 1.

In some examples, the first UE 115-a and the second UE 115-b may communicate via communication link 135-a which may be an example of a sidelink (e.g., PC5 link) between the devices. The first UE 115-a and the second UE 115-b may communicate a first control signal 205, a second control signal 210, a sidelink message 215, and a COT indicator 220 using the communication link 135-a. The first UE 115-a and the second UE 115-b may be configured to communicate via resources within licensed spectrum, unlicensed spectrum, or both. For example, the first UE 115-a and the second UE 115-b may each be configured with a single sidelink BWP (SL-BWP) , where the configured-activated SL-BWP may be associated with resources within a band of licensed spectrum or unlicensed spectrum.

The first UE 115-a and the second UE 115-b may reserve sidelink resources for future transmissions, such as the sidelink message 215, to other UEs (e.g., referred to as Mode 2) . Resource selection may include two steps in Mode 2. In the first step, the UE (e.g., the first UE 115-a or the second UE 115-b) may identify candidate resources by sensing and exclusion. In the second step, the UE may select the candidate resource from the identified resources. In some cases, the second step may be performed by higher layers using random selection.

In some examples, to identify the candidate resources of the first step, when the UE is not transmitting, the UE may sense the sidelink resources during a sensing window 225. The sensing window 225 may be a time interval defined by a range of slots (e.g., n-T₀, n-T_proc, 0) , where n is a resource selection (or reselection) trigger 230 or a slot at which new resources may be selected, T₀ is configured (or preconfigured) as a quantity of time (e.g., 100 ms or 1100 ms) , and T_proc, 0 is a time to complete the sensing procedure. The UE may exclude candidate resources in the resource selection window 235. The resource selection window 235 may include resources within a range of slots [n+T₁, n+T₂] , where T₁ is a processing time to identify candidate resources and select new sidelink resources, T₂ may refer to a time for selecting resources for a transmission with a lower bound of T_2, min and an upper bound of a remaining delay budget (e.g., a packet delay budget (PDB) ) . The lower bound T_2, min may refer to a minimum time for selecting resources for a sidelink message. In one case, the UE may exclude candidate resources that relate to half-duplex operation because the UE may not sense a reservation from other UEs announced in the slot of the sensing window 225 where the UE was transmitting. In another case, the UE may exclude candidate resources based on reservations reserved from other UEs in the 1st –stage sidelink control information (SCI) detected during the sensing window 225. The identification of the candidate resources of the first step may be performed in the physical layer. After identifying the available candidate resources by sensing and exclusion, the UE physical layer may report the identified candidate resources to the medium access control (MAC) layer of the UE.

In some examples, to select candidate resources from the identified candidate resources, the UE may randomly select the sidelink resources from the available candidate resources reported from UE physical layer. To select a quantity (N) of resources from the available candidate resources, the UE first may select randomly one of the N candidate resources. For example, the UE may select a first candidate resource in slot m₁. The UE may also select randomly a second candidate resource, with a restriction that a gap between the second candidate resource and the first selected candidate resource be smaller than a window W of 32 slots. The second candidate resource may located in slot m₂ within a range of slots defined by [m₁-31, m₁+31] . If N is larger than 2, the UE may select a third candidate resource with the restriction that the third candidate resource (e.g., slot m₃) is located within a range [m₁-31, m₁+31] or [m₂-31, m₂+31] . The UE may repeat the procedure of the second step until the N candidate resources are selected.

In some examples, the first UE 115-may transmit the first control signal 205 to the second UE 115-b and other UEs that indicate a first set of resources reserved by the first UE 115-a for a future transmission. In some cases, the second UE 115-b may transmit the second control signal 210 to at least the first UE 115-a indicating a second set of resources reserved by the second UE 115-b for a future transmission.

In some examples, prior to transmitting the sidelink message 215 using the first set of resources, the first UE 115-a may perform a Type 1 LBT procedure. The Type 1 LBT procedure may check whether the channel associated with the first set of resources is available. The Type 1 LBT procedure may obtain channel access and a COT for the sidelink transmission using the reserved resources. In some cases, a Type 1 LBT inter-UE blocking may exist where a transmission from the second UE 115-b or other wireless device is blocking the LBT sensing of the first UE 115-a. For example, the first UE 115-a may perform the Type 1 LBT procedure for the first set of reserved resources, and the LBT may fail because a sidelink transmission of another UE (or transmission of another wireless device) is present. In some cases, Type 1 LBT inter-UE blocking may exist where a transmission from the first UE 115-a is blocking the LBT sensing of the second UE 115-b. In some examples, to address the Type 1 LBT issue blocking, the first UE 115-a may avoid selection of a quantity of resources before the reserved resources of the second UE 115-b (e.g., Type 1 LBT blocking option 1 or first LBT blocking mode) or the first UE 115-a may share the COT (e.g., Type 1 LBT blocking option 2 or Second LBT blocking mode) . An LBT blocking mode may coordinate when LBT is performed to avoid blocking of LBTs or transmissions on resources reserved by other UEs.

FIG. 3 shows an example of a resource diagram 300 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. In some examples, the resource diagram may be implemented by the wireless communications system 200 and the wireless communications system 100. The resource diagram 300 may illustrate the first set of resources that may be selected by the first UE 115-a and the second set of resources reserved by the second UE 115-b. For example, first UE 115-a and the second UE 115-b may perform sidelink communications according to the resource diagram 300.

The resource diagram 300 illustrates a first set of resources including a first resource 305-a, a second resource 305-b, a third resource 305-c and a fourth resource 305-d reserved by the first UE 115-a within a COT 310. The second set of resources reserved by the second UE 115-b may include a first resource 315-a, a second resource 315-b, a third resource 315-c and a fourth resource 315-d, and the second set of resources may belong to a multi-consecutive slot transmission (MCSt) 320. In some cases, the to be selected resources (e.g., the first resource 305-a, the second resource 305-b, the third resource 305-c, the fourth resource 305-d) and the reserved resources (e.g., the first resource 315-a, the second resource 315-b, the third resource 315-c, and the fourth resource 315-d) may be slots occurring within the same sidelink frequency band.

In some cases, for the second LBT blocking mode (e.g., Type 1 LBT blocking option 2) , the first UE 115-a may share the COT 310 to the reserved resources of the second UE 115-b. The first UE 115-a may prioritize or select reserved resources for transmission. For example, if the first set of selected resources of the first UE 115-a (e.g., the first resource 305-a, the second resource 305-b, the third resource 305-c and the fourth resource 305-d) are before (e.g., in time) the second set of resources (e.g., the first resource 315-a, the second resource 315-b, the third resource 315-c and the fourth resource 315-d) , the first UE 115-a may share the COT 310 to the reservation of the second UE 115-b. In some cases, the second set of resources are within the COT 310 in the second LBT blocking mode.

In some examples, for the first LBT blocking mode (e.g., Type 1 LBT blocking option 1) , the first UE 115-a may avoid selection of a quantity of consecutive resource (e.g., N consecutive resources, such as N slots) before the second set of resources reserved by the second UE 115-b when the layer one (L1) sidelink priority value for the transmission is higher than the L1 SL priority value of the reserved resource. In some cases, the quantity of consecutive resources may be selected from {0, 1, 2} , and the selection of the quantity of consecutive resources may be based on UE implementation. In some examples, the first UE 115-a may avoid selection of a quantity of consecutive resources (e.g., M consecutive resources, such as N slots) after a reserved resource when the transmitting symbols of the reserved resource overlap with LBT of the selected resource. In some cases, the selection of the quantity of consecutive resources (e.g., M consecutive resources) may be based on UE implementation.

In some examples, the first set of resources selected by the first UE 115-a may be offset in time by a quantity of consecutive resources relative the second set of resources reserved by the second UE 115-b in the first LBT blocking mode. For example, the resource diagram 300 illustrates a first set of resources including a first resource 325-a, a second resource 325-b, a third resource 325-c and a fourth resource 325-d that may be selected by the first UE 115-a within a COT 330. A second set of resources including a first resource 335-a, a second resource 325-b, a third resource 325-c and a fourth resource 325-d reserved by the second UE 115-b and may belong to a MCSt 340. In some cases, the reserved resources (e.g., the first resource 325-a, the second resource 325-b, the third resource 325-c, the fourth resource 325-d, the first resource 335-a, the second resource 335-b, the third resource 335-c, and the fourth resource 335-d) may be slots within a same subcarrier. For the first LBT blocking mode, the first set of resources (e.g., the first resource 325-a, the second resource 325-b, the third resource 325-c, and the fourth resource 325-d) of the first UE 115-a may be offset from the second set of resources (the first resource 335-a, the second resource 335-b, the third resource 335-c, and the fourth resource 335-d) by a quantity of consecutive resources 345 (e.g., N consecutive resources) .

In some examples, both the first LBT blocking mode (e.g., Type 1 LBT blocking option 1) and the second LBT blocking mode (e.g., Type 1 LBT blocking option 2) may be separately supported based on UE capability for addressing the inter-UE LBT block issue. In some cases, the first UE 115-a may support both the first LBT blocking mode (e.g., Type 1 LBT blocking option 1) and second LBT blocking mode (e.g., Type 1 LBT blocking option 2) . In some cases, the first UE 115-a may apply conditions for the second LBT blocking mode (e.g., Type 1 LBT blocking option 2) if the reserved resource of the second UE belongs to a MCSt.

In some examples, the first UE 115-a may support both the first LBT blocking mode (e.g., Type 1 LBT blocking option 1) and Second LBT blocking mode (e.g., Type 1 LBT blocking option 2) . In some cases, if the first UE 115-a supports both the first LBT blocking mode and the second LBT blocking mode, the first UE 115-amay enable one mode at one time, such as the first LBT blocking mode or the second LBT blocking mode. For example, the LBT blocking configuration may indicate the second LBT blocking mode is enabled. In another example, the LBT blocking configuration may indicate that the first LBT blocking mode is enabled.

In some examples, the first UE 115-a may support both the second LBT blocking mode and the first LBT blocking mode and both the second LBT blocking mode and the first LBT blocking mode may be enabled at the same time. In some cases, if both the second LBT blocking mode and the first LBT blocking mode are enabled at the same time, the first UE 115-a may first evaluate with the second LBT blocking mode and then the first LBT blocking mode. For example, the first UE 115-a may evaluate to determine whether the COT of the first UE 115-a may cover the reserved resources of the second UE 115-b. If the COT of the first UE 115-a does not cover the reserved resources of the second UE 115-b, the first UE 115-a may not share the COT. If the COT of the first UE 115-a covers the reserved resources of the second UE 115-b, the first UE 115-a may share the COT. When considering the second LBT blocking mode, the first UE 115-a may decode stage two SCI when reading the reservation of the second UE 115-b to determine whether the first UE 115-a is the target of the transmission associated with the reserved resources. When considering the second LBT blocking mode, the first UE 115-a may determine whether the second UE 115-b is eligible to share the COT. If the first UE 115-a evaluates the second LBT blocking mode and does not share the COT, the first UE 115-a may then consider the first LBT blocking mode. For example, the first UE 115-a may determine whether the reserved resources of the second UE 115-b are offset in time by a quantity of consecutive resources relative to the first set of resources reserved by the first UE 115-a.

In some cases, if both the second LBT blocking mode and the first LBT blocking mode are enabled at the same time, the first UE 115-a may first evaluate with the first LBT blocking mode. For example, the first UE 115-a may evaluate to determine whether the reserved resources of the second UE 115-b are offset in time by a quantity of consecutive resources relative to the to the first set of resources that may be selected by the first UE 115-a. If the reserved resources of the second UE 115-b are offset in time by a quantity of consecutive resources relative to the to the first set of resources reserved by the first UE 115-a, the first UE 115-a may enable the first LBT blocking mode. If the reserved resources of the second UE 115-b are not offset in time by a quantity of consecutive resources relative to the to the first set of resources, the first UE 115-a may consider the second LBT blocking mode.

In some examples, the first UE 115-a may consider the second LBT blocking mode or the first LBT blocking mode based on UE implementation.

In some examples, the second set of reserved resources (e.g., the first resource 335-a, the second resource 325-b, the third resource 325-c, and the fourth resource 325-d) may be reserved by the second UE 115-b and may belong to the MCSt 340. When the reserved resources of the second UE 115-b belong to the MCSt, the first UE 115-a may follow conditions of applying the second LBT blocking mode. In some cases, the first UE 115-a may consider the second LBT blocking mode depending on the priority of the resources of the MCSt.

FIG. 4 shows an example of a resource diagram 400 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. In some examples, the resource diagram 400 may be implemented by the wireless communications system 200 and the wireless communications system 100. The resource diagram 400 may illustrate a first set of resources that may be selected by the first UE 115-a and a second set of resources reserved by the second UE 115-b. For example, the first UE 115-a and the second UE 115-b may perform sidelink communications according to the resource diagram 400.

The resource diagram 400 illustrates a first set of resources including a first resource 405-a, a second resource 405-b, a third resource 405-c and a fourth resource 405-d that may selected by the first UE 115-a within a COT 410. A second set of resources including a first resource 415-a, a second resource 415-b, a third resource 415-c and a fourth resource 415-d reserved by the second UE 115-b and may belong to a MCSt 420. In some cases, the selected resources (e.g., the first resource 405-a, the second resource 405-b, the third resource 405-c, the fourth resource 405-d) and the reserved resources (e.g., the first resource 415-a, the second resource 415-b, the third resource 415-c, and the fourth resource 415-d) may be slots within the same subcarrier.

In some examples, whether the first UE 115-a may consider the second LBT blocking mode may depend on the priority of the resources of the MCSt 420 which may be located out of the COT 410 (e.g., the third resource 415-c, and the fourth resource 415-d) and the priority of the COT initiating UE (e.g., the first UE 115-a) . In some cases, if a highest priority of the resources of the MCSt 420 which are located out of the COT 410 is less than a lowest priority of the COT initiating UE (e.g., the first UE 115-a) , the first UE 115-a may consider the second LBT blocking mode. In the second LBT blocking mode, the first UE 115-a may transmit a COT sharing indicator 425 to the second UE 115-b to share the COT 410 with the second UE 115-b. For example, the priority associated with the first resource 405-a may be a priority value of two, the priority associated with the second resource 405-b may be a priority value of four, the priority associated with the third resource 405-c may be a priority value of four, the priority associated with the fourth resource 405-d may be a priority value of four, the priority associated with the first resource 415-a may be a priority value of three, the priority associated with the second resource 415-b may be a priority value of three, the priority associated with the third resource 415-c may be a priority value of three, the priority associated with the fourth resource 415-d may be a priority value of three, where a lower priority value corresponds to a higher priority. In this example, the highest priority of the resources of the MCSt 420 which are located out of the COT 410 is higher than the lowest priority of the COT initiating UE (e.g., first UE 115-a) , so the first UE 115-a may not transmit the COT sharing indicator 425, and the first UE 115-a may not consider the second LBT blocking mode. Sharing of the COT may refer to the first UE 115-a permitting the second UE 115-b to use the sidelink channel to which the first UE 115-a gained access after performing the Type 1 LBT procedure to obtain channel access to the sidelink channel. In some examples, if a highest priority of the resources of the MCSt 420 which are located out of the COT 410 (e.g., occur after an ending time of the COT) is less than a highest priority of the COT initiating UE (e.g., the first UE 115-a) , the first UE 115-a may consider the second LBT blocking mode. For example, the priority associated with the first resource 405-a may be a priority value of two, the priority associated with the second resource 405-b may be a priority value of four, the priority associated with the third resource 405-c may be a priority value of four, the priority associated with the fourth resource 405-d may be a priority value of four, the priority associated with the first resource 415-a may be a priority value of three, the priority associated with the second resource 415-b may be a priority value of three, the priority associated with the third resource 415-c may be a priority value of three, the priority associated with the fourth resource 415-d may be a priority value of three, where a lower priority value corresponds to a higher priority. In this example, the highest priority of the resources of the MCSt 420 which are located out of the COT 410 is higher than the highest priority of the COT initiating UE (e.g., first UE 115-a) , so the first UE 115-a may consider the second LBT blocking mode and may transmit the COT sharing indicator 425.

In some examples, if a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT 410 (e.g., occur after an ending time of the COT) are higher than a lowest priority value of a set first priorities priority values associated with the first set of resources, the first UE 115-a may transmit the COT sharing indicator 425 to the second UE 115-b. In some cases, if a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT 410 are higher than a highest priority value of a set first priority values associated with the first set of resources, the first UE 115-a may transmit the COT sharing indicator 425 to the second UE 115-b.

In some examples, whether the first UE 115-a may consider the second LBT blocking mode may depend on the resources of the MCSt 420 located in the COT 410 (e.g., the first resource 415-a, and the second resource 415-b) . In some cases, if a quantity of the resources of the MCSt 420 which are located in the COT 410 is greater than a threshold, then the first UE 115-a may consider the second LBT blocking mode and may transmit the COT sharing indicator 425. For example, the threshold may be three slots, and for the example illustrated in FIG. 4, two slots (e.g., the first resource 415-a, and the second resource 415-b) may be located in the COT 410. In this example, the first UE 115-a may not consider the second LBT blocking mode. In some examples, if a portion of the resources of the MCSt 420 which are located in the COT 410 is greater or equal to than a threshold, then the first UE 115-a may consider the second LBT blocking mode and may transmit the COT sharing indicator 425. For example, the threshold may be fifty percent of the slots of the MCSt, and for the example illustrated in FIG. 4, two of the 4 slots of the MCSt 420 or fifty percent of the MCSt 420 may be located in the COT 410. In this example, the first UE 115-a may consider the second LBT blocking mode. For both the quantity of resources and the portion of the resources conditions, the first UE may determine whether the second UE 115-b is eligible to share the COT 410 for the MCSt transmission. For example, the first UE 115-a may decode the stage two SCI when reading the reservation of the second UE 115-b to determine whether the first UE 115-a is the target of the transmission associated with the reserved resources.

FIG. 5 shows an example of a process flow 500 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. In some examples, the process flow 500 may implement or be implemented by aspects of the wireless communications systems 100 and 200 as described with reference to FIGs. 1 and 2, respectively. For example, the process flow 500 may be implemented by a first UE 115-c and a second UE 115-d, which may be respective examples of UEs 115 as described with reference to FIGs. 1 and 2.

In some examples, the operations illustrated in process flow 500 may be performed by hardware (e.g., including circuitry, processing blocks, logic components, and other components) , code (e.g., software executed by a processor) , or any combination thereof. Alternative examples of the following may be implemented, where some steps are performed in a different order than described or are not performed at all. In some cases, steps may include additional features not mentioned below, or further steps may be added.

At 505, the first UE 115-c may receive, from a second UE 115-d, control signaling that indicates a second set of resources reserved by the second UE. At 510, the first UE 115-c may transmit, to the second UE 115-d, a COT sharing indicator.

At 515, the first UE 115-c may transmit, to the second UE 115-d, a sidelink message in a first set of resources based at least in part on a LBT blocking configuration. The first set of resources may be associated with a channel occupancy time that the first UE 115-c obtained as a result of performing a Type 1 LBT procedure to obtain sidelink channel access. In some examples, the first UE 115-c may be capable of supporting both a first LBT blocking mode and a second LBT blocking mode. In some cases, the second set of resources are within the COT in the second LBT blocking mode, or the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode. The LBT blocking configuration may indicate which of the second LBT blocking mode or the first LBT blocking mode is enabled or the LBT blocking configuration may indicate an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

In some examples, the LBT blocking configuration may indicate the channel occupancy time sharing mode is enabled. In some cases, the LBT blocking configuration may indicate the evaluation order as the first LBT blocking mode then the second LBT blocking mode. In some cases, the LBT blocking configuration may indicate the evaluation order as the second LBT blocking mode then the first LBT blocking mode. In some examples, the first LBT blocking mode is a Type 1 LBT blocking Option 1. In some examples, the second LBT blocking mode is a Type 1 LBT blocking Option 2.

In some examples, the first UE may transmit the COT sharing indicator based on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT. In some cases, the first UE may transmit the COT sharing indicator based on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the COT being higher than a lowest priority value of a set first priority values associated with the first set of resources. In some cases, the first UE may transmit the COT sharing indicator based on a highest priority of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a highest priority value of a set first priority values associated with the first set of resources.

In some examples, the first UE may transmit the COT sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time. In some cases, the first UE may transmit the COT sharing indicator based on a quantity of consecutive transmission time intervals of the second set of resources located in of the COT being greater than or equal to a threshold. In some cases, the first UE may transmit the COT sharing indicator based on a portion of consecutive transmission time intervals of the second set of resources located in the channel occupancy time being greater than or equal to a threshold.

FIG. 6 shows a block diagram 600 of a device 605 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. The device 605 may be an example of aspects of a UE 115 as described herein. The device 605 may include a receiver 610, a transmitter 615, and a communications manager 620. The device 605, or one or more components of the device 605 (e.g., the receiver 610, the transmitter 615, and the communications manager 620) , may include at least one processor, which may be coupled with at least one memory, to, individually or collectively, support or enable the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 610 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for resource selection for sidelink communication) . Information may be passed on to other components of the device 605. The receiver 610 may utilize a single antenna or a set of multiple antennas.

The transmitter 615 may provide a means for transmitting signals generated by other components of the device 605. For example, the transmitter 615 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for resource selection for sidelink communication) . In some examples, the transmitter 615 may be co-located with a receiver 610 in a transceiver module. The transmitter 615 may utilize a single antenna or a set of multiple antennas.

The communications manager 620, the receiver 610, the transmitter 615, or various combinations thereof or various components thereof may be examples of means for performing various aspects of techniques for resource selection for sidelink communication as described herein. For example, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be capable of performing one or more of the functions described herein.

In some examples, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include at least one of a processor, a digital signal processor (DSP) , a central processing unit (CPU) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a microcontroller, discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure. In some examples, at least one processor and at least one memory coupled with the at least one processor may be configured to perform one or more of the functions described herein (e.g., by one or more processors, individually or collectively, executing instructions stored in the at least one memory) .

Additionally, or alternatively, the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be implemented in code (e.g., as communications management software or firmware) executed by at least one processor. If implemented in code executed by at least one processor, the functions of the communications manager 620, the receiver 610, the transmitter 615, or various combinations or components thereof may be performed by a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, a microcontroller, or any combination of these or other programmable logic devices (e.g., configured as or otherwise supporting, individually or collectively, a means for performing the functions described in the present disclosure) .

In some examples, the communications manager 620 may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 610, the transmitter 615, or both. For example, the communications manager 620 may receive information from the receiver 610, send information to the transmitter 615, or be integrated in combination with the receiver 610, the transmitter 615, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager 620 may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager 620 is capable of, configured to, or operable to support a means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The communications manager 620 is capable of, configured to, or operable to support a means for transmitting a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

By including or configuring the communications manager 620 in accordance with examples as described herein, the device 605 (e.g., at least one processor controlling or otherwise coupled with the receiver 610, the transmitter 615, the communications manager 620, or a combination thereof) may support techniques for more efficient utilization of communication resources.

FIG. 7 shows a block diagram 700 of a device 705 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. The device 705 may be an example of aspects of a device 605 or a UE 115 as described herein. The device 705 may include a receiver 710, a transmitter 715, and a communications manager 720. The device 705, or one or more components of the device 705 (e.g., the receiver 710, the transmitter 715, and the communications manager 720) , may include at least one processor, which may be coupled with at least one memory, to support the described techniques. Each of these components may be in communication with one another (e.g., via one or more buses) .

The receiver 710 may provide a means for receiving information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for resource selection for sidelink communication) . Information may be passed on to other components of the device 705. The receiver 710 may utilize a single antenna or a set of multiple antennas.

The transmitter 715 may provide a means for transmitting signals generated by other components of the device 705. For example, the transmitter 715 may transmit information such as packets, user data, control information, or any combination thereof associated with various information channels (e.g., control channels, data channels, information channels related to techniques for resource selection for sidelink communication) . In some examples, the transmitter 715 may be co-located with a receiver 710 in a transceiver module. The transmitter 715 may utilize a single antenna or a set of multiple antennas.

The device 705, or various components thereof, may be an example of means for performing various aspects of techniques for resource selection for sidelink communication as described herein. For example, the communications manager 720 may include a second set of resources manager 725, a sidelink message manager 730, or any combination thereof. The communications manager 720 may be an example of aspects of a communications manager 620 as described herein. In some examples, the communications manager 720, or various components thereof, may be configured to perform various operations (e.g., receiving, obtaining, monitoring, outputting, transmitting) using or otherwise in cooperation with the receiver 710, the transmitter 715, or both. For example, the communications manager 720 may receive information from the receiver 710, send information to the transmitter 715, or be integrated in combination with the receiver 710, the transmitter 715, or both to obtain information, output information, or perform various other operations as described herein.

The communications manager 720 may support wireless communication in accordance with examples as disclosed herein. The second set of resources manager 725 is capable of, configured to, or operable to support a means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The sidelink message manager 730 is capable of, configured to, or operable to support a means for transmitting a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

FIG. 8 shows a block diagram 800 of a communications manager 820 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. The communications manager 820 may be an example of aspects of a communications manager 620, a communications manager 720, or both, as described herein. The communications manager 820, or various components thereof, may be an example of means for performing various aspects of techniques for resource selection for sidelink communication as described herein. For example, the communications manager 820 may include, a second set of resources manager 825, a sidelink message manager 830, a channel occupancy sharing manager 835, or any combination thereof. Each of these components, or components or subcomponents thereof (e.g., one or more processors, one or more memories) , may communicate, directly or indirectly, with one another (e.g., via one or more buses) .

The communications manager 820 may support wireless communication in accordance with examples as disclosed herein. The second set of resources manager 825 is capable of, configured to, or operable to support a means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The sidelink message manager 830 is capable of, configured to, or operable to support a means for transmitting a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

In some examples, the LBT blocking configuration indicates the second LBT blocking mode is enabled.

In some examples, the LBT blocking configuration indicates the evaluation order as the second LBT blocking mode then the first LBT blocking mode.

In some examples, the LBT blocking configuration indicates the evaluation order as the first LBT blocking mode then the second LBT blocking mode.

In some examples, the first LBT blocking mode is a Type 1 LBT blocking Option 1.

In some examples, the second LBT blocking mode is a Type 1 LBT blocking Option 2.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a lowest priority value of a set first priority values associated with the first set of resources.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a highest priority value of a set first priority values associated with the first set of resources.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a quantity of consecutive transmission time intervals of the second set of resources located in of the channel occupancy time being greater than or equal to a threshold.

In some examples, the channel occupancy sharing manager 835 is capable of, configured to, or operable to support a means for transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a portion of consecutive transmission time intervals of the second set of resources located in the channel occupancy time being greater than or equal to a threshold.

FIG. 9 shows a diagram of a system 900 including a device 905 that supports techniques for resource selection for sidelink communication in accordance with one or more aspects of the present disclosure. The device 905 may be an example of or include the components of a device 605, a device 705, or a UE 115 as described herein. The device 905 may communicate (e.g., wirelessly) with one or more network entities 105, one or more UEs 115, or any combination thereof. The device 905 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, such as a communications manager 920, an input/output (I/O) controller 910, a transceiver 915, an antenna 925, at least one memory 930, code 935, and at least one processor 940. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more buses (e.g., a bus 945) .

The I/O controller 910 may manage input and output signals for the device 905. The I/O controller 910 may also manage peripherals not integrated into the device 905. In some cases, the I/O controller 910 may represent a physical connection or port to an external peripheral. In some cases, the I/O controller 910 may utilize an operating system such as or another known operating system. Additionally, or alternatively, the I/O controller 910 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device. In some cases, the I/O controller 910 may be implemented as part of one or more processors, such as the at least one processor 940. In some cases, a user may interact with the device 905 via the I/O controller 910 or via hardware components controlled by the I/O controller 910.

In some cases, the device 905 may include a single antenna 925. However, in some other cases, the device 905 may have more than one antenna 925, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 915 may communicate bi-directionally, via the one or more antennas 925, wired, or wireless links as described herein. For example, the transceiver 915 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 915 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 925 for transmission, and to demodulate packets received from the one or more antennas 925. The transceiver 915, or the transceiver 915 and one or more antennas 925, may be an example of a transmitter 615, a transmitter 715, a receiver 610, a receiver 710, or any combination thereof or component thereof, as described herein.

The at least one memory 930 may include random access memory (RAM) and read-only memory (ROM) . The at least one memory 930 may store computer-readable, computer-executable code 935 including instructions that, when executed by the at least one processor 940, cause the device 905 to perform various functions described herein. The code 935 may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some cases, the code 935 may not be directly executable by the at least one processor 940 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some cases, the at least one memory 930 may contain, among other things, a basic I/O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.

The at least one processor 940 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some cases, the at least one processor 940 may be configured to operate a memory array using a memory controller. In some other cases, a memory controller may be integrated into the at least one processor 940. The at least one processor 940 may be configured to execute computer-readable instructions stored in a memory (e.g., the at least one memory 930) to cause the device 905 to perform various functions (e.g., functions or tasks supporting techniques for resource selection for sidelink communication) . For example, the device 905 or a component of the device 905 may include at least one processor 940 and at least one memory 930 coupled with or to the at least one processor 940, the at least one processor 940 and at least one memory 930 configured to perform various functions described herein. In some examples, the at least one processor 940 may include multiple processors and the at least one memory 930 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein. In some examples, the at least one processor 940 may be a component of a processing system, which may refer to a system (such as a series) of machines, circuitry (including, for example, one or both of processor circuitry (which may include the at least one processor 940) and memory circuitry (which may include the at least one memory 930) ) , or components, that receives or obtains inputs and processes the inputs to produce, generate, or obtain a set of outputs. The processing system may be configured to perform one or more of the functions described herein. For example, the at least one processor 940 or a processing system including the at least one processor 940 may be configured to, configurable to, or operable to cause the device 905 to perform one or more of the functions described herein. Further, as described herein, being “configured to, ” being “configurable to, ” and being “operable to” may be used interchangeably and may be associated with a capability, when executing code stored in the at least one memory 930 or otherwise, to perform one or more of the functions described herein.

The communications manager 920 may support wireless communication in accordance with examples as disclosed herein. For example, the communications manager 920 is capable of, configured to, or operable to support a means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The communications manager 920 is capable of, configured to, or operable to support a means for transmitting a sidelink message in the first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

By including or configuring the communications manager 920 in accordance with examples as described herein, the device 905 may support techniques for improved communication reliability, reduced latency, more efficient utilization of communication resources, and improved coordination between devices.

In some examples, the communications manager 920 may be configured to perform various operations (e.g., receiving, monitoring, transmitting) using or otherwise in cooperation with the transceiver 915, the one or more antennas 925, or any combination thereof. Although the communications manager 920 is illustrated as a separate component, in some examples, one or more functions described with reference to the communications manager 920 may be supported by or performed by the at least one processor 940, the at least one memory 930, the code 935, or any combination thereof. For example, the code 935 may include instructions executable by the at least one processor 940 to cause the device 905 to perform various aspects of techniques for resource selection for sidelink communication as described herein, or the at least one processor 940 and the at least one memory 930 may be otherwise configured to, individually or collectively, perform or support such operations.

FIG. 10 shows a flowchart illustrating a method 1000 that supports techniques for resource selection for sidelink communication in accordance with aspects of the present disclosure. The operations of the method 1000 may be implemented by a UE or its components as described herein. For example, the operations of the method 1000 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At 1005, the method may include receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The operations of block 1005 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1005 may be performed by a second set of resources manager 825 as described with reference to FIG. 8.

At 1010, the method may include transmitting a sidelink message in a first set of resources based on an LBT blocking configuration, where the first set of resources are associated with a channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the second set of resources are offset in time by a quantity of consecutive resources relative to the first set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode. The operations of block 1010 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1010 may be performed by a sidelink message manager 830 as described with reference to FIG. 8.

FIG. 11 shows a flowchart illustrating a method 1100 that supports techniques for resource selection for sidelink communication in accordance with aspects of the present disclosure. The operations of the method 1100 may be implemented by a UE or its components as described herein. For example, the operations of the method 1100 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At 1105, the method may include receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The operations of block 1105 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1105 may be performed by a second set of resources manager 825 as described with reference to FIG. 8.

At 1110, the method may include transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on a set first priority values associated with a first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of a channel occupancy time. The operations of block 1110 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1110 may be performed by a channel occupancy sharing manager 835 as described with reference to FIG. 8.

At 1115, the method may include transmitting a sidelink message in the first set of resources based on an LBT blocking configuration, where the first set of resources are associated with the channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode. The operations of block 1115 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1115 may be performed by a sidelink message manager 830 as described with reference to FIG. 8.

FIG. 12 shows a flowchart illustrating a method 1200 that supports techniques for resource selection for sidelink communication in accordance with aspects of the present disclosure. The operations of the method 1200 may be implemented by a UE or its components as described herein. For example, the operations of the method 1200 may be performed by a UE 115 as described with reference to FIGs. 1 through 9. In some examples, a UE may execute a set of instructions to control the functional elements of the UE to perform the described functions. Additionally, or alternatively, the UE may perform aspects of the described functions using special-purpose hardware.

At 1205, the method may include receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE. The operations of block 1205 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1205 may be performed by a second set of resources manager 825 as described with reference to FIG. 8.

At 1210, the method may include transmitting, to the second UE based on receiving the control signaling, a channel occupancy time sharing indicator based on one or more consecutive transmission time intervals of the second set of resources located being located in a channel occupancy time. The operations of block 1210 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1210 may be performed by a channel occupancy sharing manager 835 as described with reference to FIG. 8.

At 1215, the method may include transmitting a sidelink message in the first set of resources based on an LBT blocking configuration, where the first set of resources are associated with the channel occupancy time, where the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and where the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or where the second set of resources are within the channel occupancy time in the second LBT blocking mode, and where the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode. The operations of block 1215 may be performed in accordance with examples as disclosed herein. In some examples, aspects of the operations of 1215 may be performed by a sidelink message manager 830 as described with reference to FIG. 8.

The following provides an overview of aspects of the present disclosure:

Aspect 1: A method for wireless communication by a first UE, comprising: receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE; and transmitting a sidelink message in a first set of resources based at least in part on an LBT blocking configuration, wherein the first set of resources are associated with a channel occupancy time, wherein the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and wherein the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or wherein the second set of resources are within the channel occupancy time in the second LBT blocking mode, and wherein the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.

Aspect 2: The method of aspect 1, wherein the LBT blocking configuration indicates the second LBT blocking mode is enabled.

Aspect 3: The method of any of aspects 1 through 2, wherein the LBT blocking configuration indicates the evaluation order as the second LBT blocking mode then the first LBT blocking mode.

Aspect 4: The method of any of aspects 1 through 3, wherein the LBT blocking configuration indicates the evaluation order as the first LBT blocking mode then the second LBT blocking mode.

Aspect 5: The method of any of aspects 1 through 4, wherein the first LBT blocking mode is a Type 1 LBT blocking Option 1.

Aspect 6: The method of any of aspects 1 through 5, wherein the second LBT blocking mode is a Type 1 LBT blocking Option 2.

Aspect 7: The method of any of aspects 1 through 6, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.

Aspect 8: The method of any of aspects 1 through 7, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a lowest priority value of a set first priority values associated with the first set of resources.

Aspect 9: The method of any of aspects 1 through 7, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a highest priority value of a set first priority values associated with the first set of resources.

Aspect 10: The method of any of aspects 1 through 6, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.

Aspect 11: The method of any of aspects 1 through 6, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a quantity of consecutive transmission time intervals of the second set of resources located in of the channel occupancy time being greater than or equal to a threshold.

Aspect 12: The method of any of aspects 1 through 6, further comprising: transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a portion of consecutive transmission time intervals of the second set of resources located in the channel occupancy time being greater than or equal to a threshold.

Aspect 13: A first UE for wireless communication, comprising one or more memories storing processor-executable code, and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to perform a method of any of aspects 1 through 12.

Aspect 14: A first UE for wireless communication, comprising at least one means for performing a method of any of aspects 1 through 12.

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 a method of any of aspects 1 through 12.

It should be noted that the methods described herein describe possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.

Although aspects of an LTE, LTE-A, LTE-A Pro, or NR system may be described for purposes of example, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applicable to various other wireless communications systems such as Ultra Mobile Broadband (UMB) , Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDM, as well as other systems and radio technologies not explicitly mentioned herein.

Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed using a general-purpose processor, a DSP, an ASIC, a CPU, an 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 but, in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration) . Any functions or operations described herein as being capable of being performed by a processor may be performed by multiple processors that, individually or collectively, are capable of performing the described functions or operations.

The functions described herein may be implemented using hardware, software executed by a processor, firmware, or any combination thereof. If implemented using software executed by a processor, the functions may be stored as or transmitted using one or more instructions or code of a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable medium. Disk and disc, as used herein, include CD, laser disc, optical disc, digital versatile disc (DVD) , floppy disk and Blu-ray disc. Disks may reproduce data magnetically, and discs may reproduce data optically using lasers. Combinations of the above are also included within the scope of computer-readable media. Any functions or operations described herein as being capable of being performed by a memory may be performed by multiple memories that, individually or collectively, are capable of performing the described functions or operations.

As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ”

As used herein, including in the claims, the article “a” before a noun is open-ended and understood to refer to “at least one” of those nouns or “one or more” of those nouns. Thus, the terms “a, ” “at least one, ” “one or more, ” “at least one of one or more” may be interchangeable. For example, if a claim recites “a component” that performs one or more functions, each of the individual functions may be performed by a single component or by any combination of multiple components. Thus, the term “acomponent” having characteristics or performing functions may refer to “at least one of one or more components” having a particular characteristic or performing a particular function. Subsequent reference to a component introduced with the article “a” using the terms “the” or “said” may refer to any or all of the one or more components. For example, a component introduced with the article “a” may be understood to mean “one or more components, ” and referring to “the component” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ” Similarly, subsequent reference to a component introduced as “one or more components” using the terms “the” or “said” may refer to any or all of the one or more components. For example, referring to “the one or more components” subsequently in the claims may be understood to be equivalent to referring to “at least one of the one or more components. ”

The term “determine” or “determining” encompasses a variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, investigating, looking up (such as via looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” can include receiving (e.g., receiving information) , accessing (e.g., accessing data stored in memory) and the like. Also, “determining” can include resolving, obtaining, selecting, choosing, establishing, and other such similar actions.

In the appended figures, similar components or features may have the same reference label. Further, various components of the same type may be distinguished by following the reference label by a dash and a second label that distinguishes among the similar components. If just the first reference label is used in the specification, the description is applicable to any one of the similar components having the same first reference label irrespective of the second reference label, or other subsequent reference label.

The description set forth herein, in connection with the appended drawings, describes example configurations and does not represent all the examples that may be implemented or that are within the scope of the claims. The term “example” used herein means “serving as an example, instance, or illustration, ” and not “preferred” or “advantageous over other examples. ” The detailed description includes specific details for the purpose of providing an understanding of the described techniques. These techniques, however, may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.

Claims

A first user equipment (UE) , comprising:

one or more memories storing processor-executable code; and

one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the first UE to:

receive, from a second UE, control signaling that indicates a second set of resources reserved by the second UE; and

transmit a sidelink message in a first set of resources based at least in part on a listen-before-talk (LBT) blocking configuration, wherein the first set of resources are associated with a channel occupancy time, wherein the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and wherein the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or wherein the second set of resources are within the channel occupancy time in the second LBT blocking mode, and wherein the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.
The first UE of claim 1, wherein the LBT blocking configuration indicates the second LBT blocking mode is enabled.
The first UE of claim 1, wherein the LBT blocking configuration indicates the evaluation order as the second LBT blocking mode then the first LBT blocking mode.
The first UE of claim 1, wherein the LBT blocking configuration indicates the evaluation order as the first LBT blocking mode then the second LBT blocking mode.
The first UE of claim 1, wherein the first LBT blocking mode is a Type 1 LBT blocking Option 1.
The first UE of claim 1, wherein the second LBT blocking mode is a Type 1 LBT blocking Option 2.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a lowest priority value of a set first priority values associated with the first set of resources.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a highest priority value of a set first priority values associated with the first set of resources.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a quantity of consecutive transmission time intervals of the second set of resources located in of the channel occupancy time being greater than or equal to a threshold.
The first UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the first UE to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a portion of consecutive transmission time intervals of the second set of resources located in the channel occupancy time being greater than or equal to a threshold.
A method for wireless communication by a first user equipment (UE) , comprising:

receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE; and

transmitting a sidelink message in a first set of resources based at least in part on a listen-before-talk (LBT) blocking configuration, wherein the first set of resources are associated with a channel occupancy time, wherein the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and wherein the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or wherein the second set of resources are within the channel occupancy time in the second LBT blocking mode, and wherein the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.
The method of claim 13, wherein the LBT blocking configuration indicates the second LBT blocking mode is enabled.
The method of claim 13, wherein the LBT blocking configuration indicates the evaluation order as the second LBT blocking mode then the first LBT blocking mode.
The method of claim 13, wherein the LBT blocking configuration indicates the evaluation order as the first LBT blocking mode then the second LBT blocking mode.
The method of claim 13, wherein the first LBT blocking mode is a Type 1 LBT blocking Option 1.
The method of claim 13, wherein the second LBT blocking mode is a Type 1 LBT blocking Option 2.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a lowest priority value of a set first priority values associated with the first set of resources.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a highest priority value of a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time being higher than a highest priority value of a set first priority values associated with the first set of resources.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a quantity of consecutive transmission time intervals of the second set of resources located in of the channel occupancy time being greater than or equal to a threshold.
The method of claim 13, further comprising:

transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a portion of consecutive transmission time intervals of the second set of resources located in the channel occupancy time being greater than or equal to a threshold.
A first user equipment (UE) for wireless communication, comprising:

means for receiving, from a second UE, control signaling that indicates a second set of resources reserved by the second UE; and

means for transmitting a sidelink message in a first set of resources based at least in part on a listen-before-talk (LBT) blocking configuration, wherein the first set of resources are associated with a channel occupancy time, wherein the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and wherein the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or wherein the second set of resources are within the channel occupancy time in the second LBT blocking mode, and wherein the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.
The first UE of claim 25, further comprising:

means for transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.
The first UE of claim 25, further comprising:

means for transmitting, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.
A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to:

receive, from a second UE, control signaling that indicates a second set of resources reserved by the second UE; and

transmit a sidelink message in a first set of resources based at least in part on a listen-before-talk (LBT) blocking configuration, wherein the first set of resources are associated with a channel occupancy time, wherein the first UE is capable of supporting both a first LBT blocking mode and a second LBT blocking mode, and wherein the first set of resources are offset in time by a quantity of consecutive resources relative to the second set of resources in the first LBT blocking mode, or wherein the second set of resources are within the channel occupancy time in the second LBT blocking mode, and wherein the LBT blocking configuration indicates which of the first LBT blocking mode or the second LBT blocking mode is enabled or the LBT blocking configuration indicates an evaluation order of the first LBT blocking mode and the second LBT blocking mode.
The non-transitory computer-readable medium of claim 28, wherein the instructions are further executable by the one or more processors to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on a set first priority values associated with the first set of resources and a set of second priority values associated with one or more consecutive transmission time intervals of the second set of resources located out of the channel occupancy time.
The non-transitory computer-readable medium of claim 28, wherein the instructions are further executable by the one or more processors to:

transmit, to the second UE based at least in part on receiving the control signaling, a channel occupancy time sharing indicator based at least in part on one or more consecutive transmission time intervals of the second set of resources located being located in the channel occupancy time.