Channel occupancy time (COT) sharing propagation

Abstract

The present disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for wireless communications. In one aspect of the present disclosure, a method for wireless communications by a user equipment (UE) includes receiving a first message from a first device. The first device includes an originator of a first channel occupancy time (COT). The method can also include transmitting a second message including a source identity (ID) of the first device. Other aspects and features are also claimed and described.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of U.S. Patent Application No. 17 / 368,560, filed July 6, 2021, entitled “CHANNEL OCCUPANCY TIME (COT) SHARING PROPAGATION,” and U.S. Provisional Patent Application No. 63 / 058,761, filed July 30, 2020, entitled “CHANNEL OCCUPANCY TIME (COT) SHARING PROPAGATION,” the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] The various aspects of this disclosure generally relate to wireless communication systems, and more particularly to time-occupied (COT) sharing propagation.

[0004] introduction

[0005] Wireless communication networks are widely deployed to provide various communication services, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These wireless networks can be multiple-access networks capable of supporting multiple users by sharing available network resources. Typically, such multiple-access networks support communication for multiple users by sharing available network resources.

[0006] A wireless communication network may include several base stations or B-nodes capable of supporting communication between several user equipments (UEs). UEs may communicate with base stations via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the base station to the UE, while an uplink (or reverse link) refers to the communication link from the UE to the base station.

[0007] The base station can transmit data and control information to the UE on the downlink and / or receive data and control information from the UE on the uplink. On the downlink, transmissions from the base station may encounter interference from neighboring base stations or other radio frequency (RF) transmitters. On the uplink, transmissions from the UE may encounter interference from uplink transmissions from other UEs communicating with neighboring base stations or from other RF transmitters. This interference can degrade the performance of both the downlink and uplink.

[0008] As the demand for mobile broadband access continues to grow, and more user devices (UEs) are accessing long-range wireless communication networks and more short-range wireless systems are being deployed in communities, the likelihood of network interference and congestion is increasing. Research and development are continuously advancing wireless technologies to not only meet the growing demand for mobile broadband access but also to enhance and improve the user experience of mobile communications.

[0009] Vehicle-to-Everything (V2X) enables the sharing of information from a vehicle to another device or entity that may affect that vehicle, and vice versa. V2X technology is associated with vehicular communication systems that can include one or more aspects or types of communication, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), vehicle-to-pedestrian (V2P), vehicle-to-device (V2D), and vehicle-to-grid (V2G), as illustrative, non-limiting examples. V2X technology can utilize cellular-based or wireless LAN-based communications. For illustration, Cellular V2X (C-V2X) is a 3GPP (3rd Generation Partnership Project) standard that uses 3GPP-standardized 4G LTE or 5G mobile cellular connectivity to send and receive signals from a vehicle to other vehicles, pedestrians, or fixed objects in their vicinity, such as traffic lights. As part of 3GPP Release 14, C-V2X defines two transmission modes that work together to enable a wide range of use cases. Direct V2X, including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-pedestrian (V2P) communication, provides enhanced range and reliability in the dedicated ITS 5.9 GHz spectrum, independent of cellular networks and network communications (V2N) in licensed spectrum of traditional mobile broadband.

[0010] Cellular V2X communication typically occurs in licensed spectrum (such as shared spectrum within licensed cellular bands or dedicated Intelligent Transportation Systems (ITS) spectrum). In licensed cellular spectrum, V2X communication shares the uplink spectrum within the cellular network. In dedicated ITS spectrum, V2X communication can occur within a region-defined spectrum area. However, in some regions, dedicated spectrum is not guaranteed due to scarcity. Therefore, it is conceivable that cellular V2X communication could be deployed in unlicensed spectrum that can be shared by other technologies, such as Wi-Fi.

[0011] Additional V2X use of unlicensed spectrum can add extra traffic, create additional contention for access, and make access more difficult. For example, depending on packet size or quality of service requirements, a transmitting UE accessing a channel based on energy-sensing-based channel sensing (e.g., LBT based on unobstructed channel assessment) may only transmit a few time slots. Therefore, per-device channel sensing or LBT can lead to suboptimal channel access designs. As another example, a UE must perform LBT to access the channel whenever it has data ready to transmit, which can lead to wasted resources and latency (such as when LBT requires random backoff). Furthermore, for V2X communication, UEs may comply with Channel Occupied Time (COT) requirements, where continuous channel occupancy in time cannot exceed a limit. Therefore, channel access for V2X and sidelink communication in unlicensed spectrum is challenging, considering spectrum sharing with other technologies and additional requirements (such as regulatory requirements).

[0012] Overview

[0013] The following outlines some aspects of this disclosure to provide a basic understanding of the techniques discussed. This overview is not an exhaustive summary of all conceived features of this disclosure, and is neither intended to identify all key or decisive elements of all aspects of this disclosure, nor to define the scope of any or all aspects of this disclosure. Its sole purpose is to provide, in an overview form, some concepts of one or more aspects of this disclosure as a prelude to the more detailed description that follows.

[0014] One innovative aspect of the subject matter described in this disclosure can be implemented in a wireless communication method performed by a user equipment (UE). The method includes receiving a first message from a first device. The first device includes an originator of a first channel occupancy time (COT). The method also includes transmitting a second message including a source identity (ID) of the first device. Another innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus (such as a UE). The apparatus includes a transceiver configured to receive the first message from the first device. The first device includes an originator of the first COT. The apparatus further includes at least one processor and a memory coupled to the at least one processor and storing processor-readable instructions configured, when executed by the at least one processor, to initiate the transmission of a second message including the source ID of the first device.

[0015] Another innovative aspect of the subject matter described in this disclosure can be implemented in a device configured for wireless communication. The device includes means for receiving a first message from a first device. The first device includes the originator of a first COT. The device also includes means for transmitting a second message including a source ID of the first device.

[0016] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transient computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform an operation including transmitting a second message including a source ID of a first device. The operation further includes initiating the transmission of the second message including the source ID of the first device.

[0017] In an additional aspect of this disclosure, an apparatus configured for wireless communication is disclosed. The apparatus includes an interface configured for wireless communication and a processor system coupled to the interface. The processor system is configured to receive a first message from a first device. The first device includes an originator of a first COT (Content of the Message). The interface is configured to transmit a second message including a source ID of the first device.

[0018] Another innovative aspect of the subject matter described in this disclosure can be implemented in a wireless communication method performed by a UE. The method includes receiving a message including a source ID of a first device. The first device includes the originator of a COT (Content on Access to Resources). The method also includes determining, based on the source ID, whether to attempt to access resources during the COT.

[0019] Another innovative aspect of the subject matter described in this disclosure can be implemented in an apparatus (such as a UE). The apparatus includes a transceiver configured to receive a message including a source ID of a first device. The first device includes the originator of a COT (Content of Access to Resources). The apparatus further includes at least one processor and a memory coupled to the at least one processor and storing processor-readable instructions configured, when executed by the at least one processor, to determine, based on the source ID, whether to attempt to access resources during the COT.

[0020] Another innovative aspect of the subject matter described in this disclosure can be implemented in a device configured for wireless communication. The device includes means for receiving a message including a source ID of a first device. The first device includes the originator of a COT (Content Access Control). The device also includes means for determining, based on the source ID, whether to attempt to access resources during the COT.

[0021] Another innovative aspect of the subject matter described in this disclosure can be implemented in a non-transient computer-readable medium storing instructions that, when executed by a processor, cause the processor to perform operations including receiving a message including a source ID of a first device. The first device includes the originator of a COT (Content on Access to a Resource). The operations further include determining, based on the source ID, whether to attempt to access a resource during the COT.

[0022] In an additional aspect of this disclosure, an apparatus configured for wireless communication is disclosed. The apparatus includes an interface configured for wireless communication and a processor system coupled to the interface, the interface receiving a message including a source ID of a first device. The first device includes an originator of a Communication over Time (COT). The interface is configured to receive. The processor system is configured to determine, based on the source ID, whether to attempt to access resources during the COT.

[0023] Other aspects, features, and implementations of this disclosure will be apparent to those skilled in the art after reading the following description of specific example implementations of this disclosure in conjunction with the accompanying drawings. Although features of this disclosure may be described below with respect to a particular implementation and drawings, all implementations of this disclosure may include one or more of the advantageous features described herein. In other words, while one or more implementations may be described having specific advantageous features, one or more such features may also be used according to various implementations of this disclosure described herein. Similarly, although example implementations may be described below as implementations of an apparatus, system, or method, such example implementations may be implemented in various apparatuses, systems, and methods. Brief description of the attached diagram

[0025] A further understanding of the nature and advantages of this disclosure can be obtained by referring to the following figures. In the figures, similar components or features may have the same reference numerals. Furthermore, components of the same type may be distinguished by a dash following the reference numeral and a second reference numeral used to differentiate between similar components. If only the first reference numeral is used in the description, the description may be applied to any of the similar components having the same first reference numeral regardless of the second reference numeral.

[0026] Figure 1 It is a block diagram illustrating the details of an example wireless communication system.

[0027] Figure 2 It is a block diagram that conceptually illustrates an example design for a base station and user equipment (UE).

[0028] Figure 3A It is a Mode 1 physical layer procedure flow for sidelink resource granting based on the Vehicle-to-Everything (V2X) interface dynamic granting (DG) / configurable granting (CG) type 2 protocol.

[0029] Figure 3B It is a Mode 2 physical layer protocol flow used for sidelink communication.

[0030] Figure 4 This is a block diagram illustrating an example wireless communication system used for Channel Occupancy Time (COT) shared propagation.

[0031] Figure 5This is a diagram illustrating an example of COT sharing and propagation.

[0032] Figure 6 This is a flowchart illustrating an example process for UE operation used in communication.

[0033] Figure 7 This is a flowchart illustrating another example of a process used for communication by the UE.

[0034] Figure 8 It is a block diagram that conceptually explains the design of the UE.

[0035] Similar reference numerals and naming conventions in the various figures indicate similar elements.

[0036] Detailed description

[0037] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to limit the scope of this disclosure. Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be implemented in many different forms and is not to be construed as limited to any specific structure or function given throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will appreciate that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods practiced using additional structures, functionalities, or structures and functionalities that complement or supplement the various aspects of this disclosure set forth herein. Any aspect of this disclosure disclosed herein may be implemented by one or more elements of the claims.

[0038] This disclosure provides systems, apparatus, methods, and computer-readable media for Channel Occupied Time (COT) sharing propagation. For illustration, a first User Equipment (UE) may initiate a COT and transmit a first message including sharing information associated with the COT and the source ID of the first UE. For example, the first message may include first Side Link Control Information (SCI). The first message may be received by a second UE and may be missed by a third UE (e.g., not received by the third UE). The second UE may transmit a second message to relay the sharing information to one or more other UEs (such as the third UE). The second message may include the sharing information and the source ID of the first UE. The third UE may receive the second message and identify the source ID of the first UE, the sharing information, or a combination thereof. The third UE may determine whether to attempt to access a resource during the COT based on the received second message. For example, the third UE may determine to attempt to access a resource based on distance (e.g., absolute physical distance or relative physical distance), signal strength (e.g., Reference Received Power (RSRP), Received Signal Strength Indicator (RSSI), or path loss measured based on a sidelink between the third UE and the first UE), energy detection (ED) value, or a combination thereof. To explain, a third UE can compare distance, signal strength, or ED value with one or more thresholds to determine whether to attempt to access resources during COT.

[0039] In some implementations, the third UE may determine or identify a set of conditions to be met for the third UE to attempt access to the first resource during the first COT, based on whether the third UE directly receives the first message from the first device. For example, if the third UE does not directly receive the first message from the first UE, the condition set may indicate that the third UE needs to meet a first distance requirement (e.g., a first distance threshold), a first signal strength requirement (e.g., a first signal strength threshold), a first ED requirement (e.g., a first ED threshold), or a combination thereof. Alternatively, if the third UE directly receives the first message from the first UE, the condition set may indicate that the UE needs to meet a second distance requirement (e.g., a second distance threshold), a second signal strength requirement (e.g., a second signal strength threshold), a second ED requirement (e.g., a second ED threshold), or a combination thereof.

[0040] Specific implementations of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages. In some aspects, this disclosure provides COT sharing propagation. For example, a second UE may propagate sharing information (e.g., COT sharing information), which may enable a third UE or another device that missed receiving the sharing information directly from the first UE (e.g., the COT originator) to still attempt to access resources during COT.

[0041] This disclosure generally relates to providing or participating in licensed shared access between two or more wireless communication systems (also known as wireless communication networks). One or more aspects of the wireless communication networks described herein can be used or incorporated into V2X systems. In various implementations, technologies and apparatus can be used in wireless communication networks such as Code Division Multiple Access (CDMA) networks, Time Division Multiple Access (TDMA) networks, Frequency Division Multiple Access (FDMA) networks, Orthogonal FDMA (OFDMA) networks, Single Carrier FDMA (SC-FDMA) networks, LTE networks, GSM networks, fifth-generation (5G) or new radio (NR) networks (sometimes referred to as "5G NR" networks / systems / equipment), and other communication networks. As described herein, the terms "network" and "system" can be used interchangeably.

[0042] CDMA networks enable radio technologies such as Universal Terrestrial Radio Access (UTRA) and CDMA2000. UTRA includes Wideband CDMA (W-CDMA) and Low Chip Rate (LCR). CDMA2000 covers the IS-2000, IS-95, and IS-856 standards.

[0043] TDMA networks enable radio technologies such as the Global System for Mobile Communications (GSM). 3GPP defines the standard for the Radio Access Network (RAN) (also referred to as GERAN) for GSM EDGE (Enhanced Data Rate GSM Evolution). GERAN is the radio component of GSM / EDGE along with the network that connects base stations (e.g., Ater and Abis interfaces) to base station controllers (A interface, etc.). The radio access network represents the component of the GSM network through which telephone calls and packet data are routed from the Public Switched Telephone Network (PSTN) and the Internet to the subscriber's handset (also called the user terminal or user equipment (UE)) and from the subscriber's handset to the PSTN and the Internet. A mobile phone operator's network may include one or more GERANs, which may be coupled to the UTRAN in the case of UMTS / GSM networks. Additionally, the operator's network may include one or more LTE networks, or one or more other networks. Different network types may use different Radio Access Technologies (RATs) and Radio Access Networks (RANs).

[0044] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, and flash-OFDM. UTRA, E-UTRA, and GSM are part of the Universal Mobile Telecommunications System (UMTS). Specifically, Long Term Evolution (LTE) is a UMTS version using E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents from an organization called the 3rd Generation Partnership Project (3GPP), while cdma2000 is described in documents from an organization called 3rd Generation Partnership Project 2 (3GPP2). These various radio technologies and standards are known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration among various telecommunications association groups that aims to define globally applicable third-generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the Universal Mobile Telecommunications System (UMTS) mobile phone standard. 3GPP defines specifications for next-generation mobile networks, mobile systems, and mobile devices. This disclosure may refer to LTE, 4G, 5G, or NR technologies to describe certain aspects; however, this description is not intended to be limited to any particular technology or application, and one or more aspects described with reference to one technology may be understood to be applicable to another technology. In fact, one or more aspects of this disclosure relate to shared access to radio spectrum between networks using different radio access technologies or radio air interfaces.

[0045] 5G networks envision a variety of deployments, spectrums, services, and devices that can be implemented using a unified OFDM-based air interface. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also considered. 5G NR will be able to scale to provide coverage for: (1) ultra-high density (such as approximately 1 M nodes / km) 2 (1) A massive Internet of Things (IoT) with ultra-low complexity (e.g., approximately tens of bits per second), ultra-low energy consumption (e.g., approximately 10+ years of battery life), and deep coverage capable of reaching challenging locations; (2) A massive Internet of Things (IoT) with robust security (to protect sensitive personal, financial, or confidential information), ultra-high reliability (e.g., approximately 99.9999% reliability), ultra-low latency (e.g., approximately 1 millisecond (ms)), and mission-critical control for users with a wide range of mobility or lack of mobility; and (3) Enhanced mobile broadband, including extremely high capacity (e.g., approximately 10 Tbps / km). 2 Extreme data rates (such as multi-Gbps rates, 100+Mbps user experience rates), and deep insights with advanced discovery and optimization.

[0046] 5G NR devices, networks, and systems can utilize optimized OFDM-based waveform characteristics. These characteristics can include: scalable parameter design and transmission time intervals (TTI); a shared, flexible framework for efficiently multiplexing services and features using dynamic, low-latency Time Division Duplex (TDD) / Frequency Division Duplex (FDD) designs; and advanced radio technologies such as massive MIMO, robust millimeter-wave (mmWave) transmission, advanced channel coding, and device-centric mobility. The scalability of parameter design in 5G NR (and the scaling of subcarrier spacing) can efficiently address the operation of diverse services across diverse spectrum and deployments. For example, in various outdoor and macro coverage deployments implemented with FDD / TDD below 3 GHz, subcarrier spacing can occur at 15 kHz over bandwidths such as 1, 5, 10, and 20 MHz. For other various outdoor and small-cell coverage deployments with TDD above 3 GHz, subcarrier spacing can occur at 30 kHz over an 80 / 100 MHz bandwidth. For various other indoor broadband implementations, by using TDD in the unlicensed portion of the 5 GHz band, the subcarrier spacing can occur at 60 kHz over a 160 MHz bandwidth. Finally, for various deployments transmitting mmWave components under TDD at 28 GHz, the subcarrier spacing can occur at 120 kHz over a 500 MHz bandwidth.

[0047] 5G NR's scalable parameter design enables scalable TTIs to meet various latency and Quality of Service (QoS) requirements. For example, shorter TTIs can be used for low latency and high reliability, while longer TTIs can be used for higher spectral efficiency. Efficient multiplexing of long and short TTIs allows transmissions to begin at symbol boundaries. 5G NR also envisions a self-contained integrated subframe design that incorporates uplink / downlink scheduling information, data, and acknowledgments within the same subframe. Self-contained integrated subframes support communication in unlicensed or contention-based shared spectrum and support adaptive uplink / downlink that can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic needs.

[0048] For clarity, aspects of the various devices and technologies are described below with reference to exemplary LTE implementations or in an LTE-centric manner, and LTE terminology may be used in various sections of the following description as illustrative examples; however, this description is not intended to be limited to LTE applications. In fact, this disclosure focuses on shared access to radio spectrum between networks using different radio access technologies or radio air interfaces (such as those of 5G NR). Additionally or alternatively, aspects of the devices and technologies described herein (such as LTE implementations, 5G NR implementations, other wireless communication implementations, or combinations thereof) can be used for V2X communications.

[0049] Furthermore, it should be understood that in operation, wireless communication networks adapted according to the concepts herein can be operated using any combination of licensed or unlicensed spectrum, depending on load and availability. Accordingly, it will be apparent to those skilled in the art that the systems, apparatuses, and methods described herein can be applied to other communication systems and applications different from the specific examples provided.

[0050] While the aspects are described herein through the explanation of a few examples, those skilled in the art will understand that additional implementations and use cases can arise in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, aspects or uses can arise via integrated chip implementations and other devices based on non-modular components (such as end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / shopping devices, medical devices, AI-enabled devices, etc.). While some examples may or may not be specific to particular use cases or applications, broad applicability of the described innovations can emerge. The range of implementations can extend from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or OEM devices or systems incorporating one or more of the described aspects. In some practical contexts, devices incorporating the described aspects and features may also necessarily include additional components and features for implementation and practice. The innovations described herein are intended to be practiced in a wide variety of implementations, including both large and small devices of different sizes, shapes, and configurations, chip-level components, multi-component systems (such as RF chains, communication interfaces, processors), distributed arrangements, end-user devices, and so on.

[0051] Figure 1 This is a block diagram illustrating the details of an example wireless communication system. The wireless communication system may include a wireless network 100. For example, wireless network 100 may include a 5G wireless network. As those skilled in the art will appreciate, Figure 1 The components appearing in this network likely have corresponding parts in other network deployments (including, for example, cellular and non-cellular network deployments, such as device-to-device, peer-to-peer, or self-organizing network deployments, etc.).

[0052] Figure 1The wireless network 100 described herein includes several base stations 105 and other network entities. Base stations can be stations that communicate with UEs and can be referred to as evolved B-nodes (eNBs), next-generation eNBs (gNBs), access points, etc. Each base station 105 can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" can refer to such a specific geographic coverage area of ​​a base station or a base station subsystem serving that coverage area, depending on the context in which the term is used. In the implementation of the wireless network 100 herein, base stations 105 can be associated with the same operator or different operators; for example, the wireless network 100 may include multiple operator wireless networks. Additionally, in the implementation of the wireless network 100 herein, base stations 105 can use one or more frequencies (such as licensed spectrum, unlicensed spectrum, or one or more bands of a combination thereof) from the same frequencies as adjacent cells to provide wireless communication. In some examples, an individual base station 105 or UE 115 can be operated by more than one network operating entity. In some other examples, each base station 105 and UE 115 can be operated by a single network operating entity.

[0053] Base stations can provide communication coverage for macrocells, small cells (such as picocells or femtocells), or other types of cells. Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as picocells) typically cover a relatively small geographic area and allow unrestricted access by UEs with service subscriptions to a network provider. Small cells (such as femtocells) also typically cover a relatively small geographic area (such as a residential area) and, in addition to unrestricted access, allow restricted access by UEs associated with that femtocell (such as UEs in a Closed Subscriber Group (CSG), UEs of users in that residence, etc.). A base station for a macrocell may be referred to as a macro base station. A base station for a small cell may be referred to as a small cell base station, pico base station, femtocell, or home base station. Figure 1 In the examples shown, base stations 105d and 105e are conventional macro base stations, while base stations 105a-105c are macro base stations enabled with one of 3D, full-dimensional (FD), or massive MIMO capabilities. Base stations 105a-105c utilize their higher-dimensional MIMO capabilities to increase coverage and capacity using 3D beamforming in both elevation and azimuth beamforming. Base station 105f is a small cell base station, which can be a home node or a portable access point. A base station can support one or more cells, such as two cells, three cells, four cells, etc.

[0054] Wireless Network 100 can support synchronous or asynchronous operation. For synchronous operation, each base station can have similar frame timing, and transmissions from different base stations can be roughly aligned in time. For asynchronous operation, each base station can have different frame timing, and transmissions from different base stations can be misaligned in time. In some scenarios, the network can be implemented or configured to handle dynamic switching between synchronous and asynchronous operation.

[0055] UE 115 is distributed across wireless network 100, and each UE can be either stationary or mobile. It should be understood that although mobile devices are generally referred to as User Equipment (UE) in standards and specifications issued by the 3rd Generation Partnership Project (3GPP), such devices may also be referred to by those skilled in the art as mobile station (MS), subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal (AT), mobile terminal, radio terminal, remote terminal, handheld device, terminal, user agent, mobile client, client, gaming device, augmented reality device, vehicle component / module, or any other suitable term. Within this document, a “mobile” device or UE does not necessarily have mobility capabilities and may be stationary. Some non-limiting examples of mobile devices include embodiments that may include one or more of the various UEs 115, including mobile stations, cellular phones (cell phones), smartphones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, laptops, personal computers (PCs), notebooks, netbooks, smartbooks, tablets, and personal digital assistants (PDAs). Mobile devices can also be Internet of Things (IoT) or “Internet of Everything” (IoE) devices, such as automobiles or other transportation vehicles, satellite radios, Global Positioning System (GPS) devices, logistics controllers, drones, multi-rotor aircraft, quadcopters, smart energy or security devices, solar panels or solar arrays, urban lighting, water or other infrastructure; industrial automation and enterprise equipment; consumer and wearable devices, such as glasses, wearable cameras, smartwatches, health or fitness trackers, mammalian implantable devices, posture tracking devices, medical devices, digital audio players (e.g., MP3 players), cameras, game consoles, etc.; and digital home or smart home devices, such as home audio, video and multimedia equipment, appliances, sensors, vending machines, smart lighting, home security systems, smart meters, etc. In one aspect, a UE can be a device that includes a Universal Integrated Circuit Card (UICC). In another aspect, a UE can be a device that does not include a UICC. In some aspects, a UE that does not include a UICC can also be referred to as an IoE device. Figure 1The UEs 115a-115d in the illustrated embodiments are examples of mobile smartphone-type devices accessing the wireless network 100. The UE can also be a machine specifically configured for connected communications (including machine-type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc.). Figure 1 The UE 115e-115k described in the text is an example of various machines configured for accessing communications on the wireless network 100.

[0056] Mobile devices (such as UE 115) can communicate with any type of base station (whether macro base station, pico base station, femto base station, relay, etc.). Figure 1 In this context, a communication link (represented as a lightning bolt) indicates a radio transmission between the UE and a serving base station (a serving base station is a base station designated to serve the UE on a downlink or uplink), or a desired transmission between base stations, and a backhaul transmission between base stations. Backhaul communication between base stations of the wireless network 100 can occur using wired and / or wireless communication links.

[0057] In the operation of wireless network 100, base stations 105a-105c use 3D beamforming and coordinated spatial technologies (such as Coordinated Multipoint (CoMP) or multi-connectivity) to serve UEs 115a and 115b. Macro base station 105d performs backhaul communication with base stations 105a-105c and small cell base station 105f. Macro base station 105d also transmits multicast services subscribed to and received by UEs 115c and 115d. Such multicast services may include mobile television or streaming video, or may include other services for providing community information (such as weather emergencies or alerts, such as Amber Alerts or Grey Alerts).

[0058] The wireless network 100 in each embodiment supports mission-critical communication with highly reliable and redundant links for mission-critical devices such as UE 115e, which is a drone. Redundant communication links with UE 115e include those from macro base stations 105d and 105e, and small cell base station 105f. Other machine-type devices (such as UE 115f (thermometer), UE 115g (smart meter), and UE 115h (wearable device)) can communicate directly with base stations (such as small cell base station 105f and macro base station 105e) via the wireless network 100, or in a multi-hop configuration via the wireless network 100 by communicating with another user equipment relaying its information to the network (e.g., UE 115f relays temperature measurement information to smart meter UE 115g, which is then reported to the network via small cell base station 105f). Wireless network 100 can also provide additional network efficiency through dynamic, low-latency TDD / FDD communication, such as in vehicle-to-vehicle (V2V) mesh networks between UEs 115i-115k communicating with macro base station 105e. Additionally, the V2V mesh network may include or correspond to a vehicle-to-everything (V2X) network between UEs 115i-115k and one or more other devices, such as UEs 115x, 115y.

[0059] Figure 2 This is a block diagram conceptually illustrating an example design for base station 105 and UE 115. Base station 105 and UE 115 can be... Figure 1 One of the base stations and one of the UEs. For restricted association scenarios (as mentioned above), base station 105 can be... Figure 1 In the small cell base station 105f, UE 115 can be UE 115c or 115D operating within the service area of ​​base station 105f. To access small cell base station 105f, UE 115 will be included in the list of accessible UEs of small cell base station 105f. Additionally, base station 105 can also be some other type of base station. Figure 2 As shown, base station 105 may be equipped with antennas 234a to 234t, and UE 115 may be equipped with antennas 252a to 252r for facilitating wireless communication.

[0060] At base station 105, transmitter processor 220 can receive data from data source 212 and control information from controller / processor 240. The control information can be used for Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ (Automatic Repeat Request) Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Enhanced Physical Downlink Control Channel (EPDCCH), MTC Physical Downlink Control Channel (MPDCCH), etc. Data can be used for PDSCH, etc. Transmitter processor 220 can process (such as encoding and symbol mapping) data and control information to obtain data symbols and control symbols respectively. Additionally, transmitter processor 220 can also generate reference symbols, such as reference symbols for primary synchronization signal (PSS) and secondary synchronization signal (SSS), and reference symbols that vary depending on the cell. The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing on data symbols, control symbols, or reference symbols where applicable, and can provide the output symbol stream to modulators (MODs) 232a to 232t. For example, the spatial processing performed on data symbols, control symbols, or reference symbols may include precoding. Each modulator 232 can process its respective output symbol stream (such as for OFDM) to obtain an output sample stream. Each modulator 232 can additionally or alternatively process the output sample stream to obtain a downlink signal. For example, to process the output sample stream, each modulator 232 can convert to analog, amplify, filter, and up-convert the output sample stream to obtain a downlink signal. The downlink signal from modulators 232a to 232t can be transmitted via antennas 234a to 234t, respectively.

[0061] At UE 115, antennas 252a to 252r can receive downlink signals from base station 105 and can respectively provide the received signals to demodulators (DEMODs) 254a to 254r. Each demodulator 254 can condition (e.g., filter, amplify, down-convert, and digitize) its respective received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain received symbols. MIMO detector 256 can obtain the received symbols from demodulators 254a to 254r, perform MIMO detection on these received symbols where applicable, and provide detected symbols. Receiver processor 258 can process these detected symbols, provide decoded data for UE 115 to data sink 260, and provide decoded control information to controller / processor 280. For example, to process these detected symbols, receive processor 258 can demodulate, deinterleave, and decode these detected symbols.

[0062] On the uplink, at UE 115, transmit processor 264 can receive and process data from data source 262 (such as data for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 280 (e.g., control information for the Physical Uplink Control Channel (PUCCH)). Transmit processor 264 can also generate reference symbols for reference signals. Symbols from transmit processor 264 can be pre-encoded by TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for SC-FDM), and transmitted to base station 105, where applicable. At base station 105, uplink signals from UE 115 can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236, and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 115. Processor 238 can provide decoded data to data trap 239 and decoded control information to controller / processor 240.

[0063] Controllers / processors 240 and 280 can direct operations at base station 105 and UE 115, respectively. Controllers / processors 240 and / or other processors and modules at base station 105 and / or controllers / processors 280 and / or other processors and modules at UE 115 can perform or direct the execution of various processes used in the techniques described herein, such as the execution or direction of the processes illustrated in Figures 3-8 and / or other processes used in the techniques described herein. Memory 242 and 282 can store data and program code for base station 105 and UE 115, respectively. Scheduler 244 can schedule the UE for downlink or uplink data transmission.

[0064] Wireless communication systems operated by different network operating entities (such as network operators) can share spectrum. In some instances, one network operating entity may be configured to use an entire designated shared spectrum for at least one time period, after which another network operating entity uses the same entire designated shared spectrum for a different time period. Thus, in order to allow network operating entities to use the entire designated shared spectrum and to mitigate interference communications between different network operating entities, specific resources (such as time) can be allocated and distributed to different network operating entities for specific types of communication.

[0065] For example, specific time resources can be allocated to a network operating entity, reserved for its exclusive use of the entire shared spectrum for communication. Additional time resources can also be allocated to a network operating entity, giving it priority over other network operating entities for communication within the shared spectrum. These time resources, preferentially allocated to the network operating entity, can be utilized by other network operating entities on a wait-and-see basis if the prioritized entity does not utilize them. Additional time resources can be allocated to any network operator for use on a wait-and-see basis.

[0066] Access to shared spectrum and arbitration of time resources among different network operators can be centrally controlled by a single entity, determined autonomously through a predefined arbitration scheme, or dynamically determined based on the interaction between the network operator's wireless nodes.

[0067] In some scenarios, UE 115 and base station 105 may operate in a shared radio spectrum band, which may include licensed or unlicensed (e.g., contention-based) spectrum. In the unlicensed frequency portion of the shared radio spectrum band, UE 115 or base station 105 may conventionally perform media sensing procedures to contend for access to the spectrum. For example, UE 115 or base station 105 may perform a Listen-Before-Speak (LBT) procedure (such as Open Channel Assessment (CCA)) before communication to determine if a shared channel is available. CCA may include energy detection procedures to determine the presence of any other active transmissions. For example, the device may infer that a change in the Received Signal Strength Indicator (RSSI) of the power meter indicates that the channel is occupied. Specifically, signal power concentrated in a specific bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. CCA may also include detection of a specific sequence indicating channel usage. For example, another device may transmit a specific preamble before transmitting a data sequence. In some cases, LBT procedures may include radio nodes acting as collision-proxies adjusting their own backoff windows based on the amount of energy detected on the channel and / or ACK / NACK feedback on their own transmitted packets.

[0068] In some scenarios, UE 115 and base station 105 may operate in a shared radio spectrum band, which may include licensed or unlicensed (e.g., contention-based) spectrum. In the unlicensed frequency portion of the shared radio spectrum band, UE 115 or base station 105 may conventionally perform media sensing procedures to contend for access to the spectrum. For example, UE 115 or base station 105 may perform Listen-Before-Speak or Listen-Before-Transmit (LBT) procedures (such as Open Channel Assessment (CCA)) before communication to determine if a shared channel is available. CCA may include energy detection procedures to determine if any other active transmissions exist. For example, the device may infer that a change in the Received Signal Strength Indicator (RSSI) of the power meter indicates that the channel is occupied. Specifically, signal power concentrated in a specific bandwidth and exceeding a predetermined noise floor may indicate another wireless transmitter. In some implementations, CCA may include the detection of a specific sequence indicating channel usage. For example, another device may transmit a specific preamble before transmitting a data sequence. In some cases, LBT procedures may include allowing a radio node to act as a collision-prone agent by adjusting its own backoff window based on the amount of energy detected on the channel or feedback on the acknowledgment or negation of packets it transmits (ACK or NACK).

[0069] Existing V2X interface protocols provide dynamic and configured granting for sidelinks (e.g., PSCCH or PSSCH) using the PC5 interface. A Delegated Group (DG) can provide one-time granting of sidelink resources, such as in response to an instantaneous demand / need for sidelink communication. A Configurable Group (CG) can provide granting of sidelink resources to enable continuous / periodic / repetitive sidelink communication. The first type of sidelink resource granting (Type 1) in V2X interface protocols uses an Restricted Rate Control (RRC) to configure the UE with resources for the CG. The second type of sidelink resource granting (Type 2) in V2X interface protocols uses a Delegated Collection Center (DCI) on the PDCCH to configure the UE with resources for either a DG or CG. For example, the DCI can be a DG, providing the allocation of resources to be used for sidelink communication. Alternatively, the DCI can be a CG, activating / deactivating the CG for sidelink communication.

[0070] Resource allocation for sidelink communication can be performed according to one or more modes, such as a first mode (Mode 1) or a second mode (Mode 2). In the first mode (Mode 1), the base station (such as a gNB) assigns one or more resources to be used by the TX UE and the RX UE. To illustrate, the base station can transmit a DCI to the TX UE in the Uu interface to grant it one or more resources for sidelink communication. In the second mode (Mode 2), the TX UE autonomously selects one or more resources for sidelink communication—that is, the base station does not assign any of these resources. The operation of the RX UE can be the same for both the first mode (Mode 1) and the second mode (Mode 2).

[0071] Figure 3A This section explains the Mode 1 physical layer procedure flow (procedure flow 500) for sidelink resource granting based on the V2X interface DG / CG Type 2 protocol mentioned above. It is described with reference to the V2X mesh network between UEs 115i and 115k communicating with macro base station 105e. Figure 3A The procedure flow 500, such as Figure 1 The wireless network 100 is shown. However, it should be understood that this procedure flow can be implemented with respect to various UEs and UE configurations.

[0072] Procedure flow 500 can be an example of a first mode (mode 1) in which base station 105e performs resource allocation for Tx resources used for sidelink communication via DCI 3_0. DCI 3_0 can be transmitted by base station 105e to allocate time and frequency resources and can indicate transmission timing. The first mode (mode 1) can support Dynamic Grant (DG), Configured Grant (CG) type 1, and CG type 2. CG type 1 can be activated via RRC signaling from base station 105e. MCS can be determined by the TX UE (such as UE 115k) within the constraints set by base station 105e.

[0073] exist Figure 3A In procedure flow 500, at procedure 501, base station 105a uses a DCI provided according to DCI format 3_0 and configured to correspond to UE 115k (e.g., sidelink TX UE) to deliver DG / CG type 2 to UE 115k. DCI format 3_0 provides fields for time slots, Hybrid Automatic Repeat Request (HARQ) procedure identifier, new data indicator, minimum index to subchannel allocation for initial transmission, first-stage SCI format 0-1 fields (including frequency resource allocation and time resource allocation), physical sidelink feedback channel (PSFCH) to HARQ feedback timing indicator and PUCCH resource indicator, and configuration index in the CG case. In the case of DG, base station 105a prepares DCI using the sidelink-radio network temporary identifier (SL-RNTI) of UE 115, or in the case of CG, it prepares DCI using the sidelink-configured scheduled-radio network temporary identifier (SL-CS-RNTI) of UE 115k, to configure DCI to correspond to UE 115k. Specifically, the cyclic redundancy check (CRC) of DCI is scrambled by the SL-RNTI or SL-CS-RNTI of UE 115k to deliver DG / CG type 2 to the UE (e.g., sidelink TX UE).

[0074] In the case of CG, UE 115k (e.g., a sidelink TX UE) reports the activation (or deactivation) of the sidelink (not shown in procedure flow 500). Specifically, the activation / deactivation of the CG sidelink is reported via the Media Access Control-Control Element (MAC-CE). The MAC-CE report is also used by UE 115k to provide a sidelink buffer status report (BSR) to base station 105e. For example, UE 115k may have provided a BSR indicating that data for sidelink communication is included in the UE buffer, thereby causing sidelink resource granting to initiate procedure 501.

[0075] At procedure 502 of procedure flow 500, UE 115k (e.g., a sidelink TX UE) schedules the PSSCH using SCIs provided according to SCI format 0-1 (e.g., for scheduling the Physical Sidelink Shared Channel (PSSCH) and the second-stage SCI on the PSSCH) and SCI format 0-2 (e.g., for decoding the PSSCH), and transmits data to UE 115j (e.g., a sidelink receiver (RX) UE) via the PSSCH according to DG / CG type 2 (sidelink resource granting in procedure 501). SCI format 0-1 provides for priority, frequency resource allocation, time resource allocation, resource reservation period, demodulation reference signal (DMRS) mode, second-stage SCI format (broadcast, unicast, multicast), Beta_offset ( The fields include an offset indicator, the number of DMRS ports, the modulation and coding scheme (MCS), and reserved fields. SCI format 0-2 provides fields for HARQ procedure identifier, new data indicator, redundancy version, source identifier, destination identifier, and channel state information (CSI) request, and also provides the field if the second-stage SCI format field in the corresponding SCI provided in SCI format 0-1 indicates the presence of a type 1 multicast zone identifier and a communication range requirement field. MCS selection is performed by a sidelink TX UE (e.g., UE 115k in procedure flow 500) within the constraints set by the base station (e.g., base station 105e).

[0076] As can be seen from the foregoing, the base station schedules node resources for the sidelink TX UE (Procedure 501), and the sidelink TX UE uses some or all of the scheduled resources to implement one or more sidelinks with the sidelink RX UE (Procedure 502). However, the base station does not control how the sidelink TX UE uses these resources or which UEs are selected by the sidelink TX UE as the sidelink RX UE. Existing V2X does not enable the base station to grant sidelink resource permission to the sidelink TX UE and schedule sidelink resources for a specific sidelink (e.g., a sidelink between the sidelink TX UE and a designated sidelink RX UE). Furthermore, existing V2X can provide a single permission for a single sidelink communication (such as a single sidelink unicast communication).

[0077] continue Figure 3A In procedure flow 500, in procedure 503, UE 115j (e.g., sidelink RX UE) provides sidelink feedback to UE 115k (e.g., sidelink TX UE). Specifically, UE 115j sends ACK / NACK on PSFCH upon receiving each transmission according to DG / CG type 2.

[0078] At procedure 504 of procedure flow 500, UE 115k (e.g., sidelink TX UE) forwards the sidelink feedback provided by UE 115j (e.g., sidelink RX UE) to base station 105e. Specifically, UE 115k forwards the ACK / NACK received from UE 115j to base station 105e on the PUCCH.

[0079] Figure 3B This explains the Mode 2 physical layer procedure flow (procedure flow 550) for sidelink resource granting based on the V2X interface mentioned above. It is described with reference to the V2X mesh network between UE 115j and 115k. Figure 3B The procedure flow is 550. However, it should be understood that this procedure flow can be implemented with respect to various UEs and UE configurations.

[0080] In the second mode (Mode 2), the TX UE 115k can perform channel sensing and identify resources reserved for transmissions on other sidelinks by blindly decoding all PSCCH channels. The TX UE 115k reports available resources to its upper layer, which then determines resource usage.

[0081] exist Figure 3BIn procedure flow 550, after the resource usage decision, the TX UE 115k transmits PSCCH 560. PSCCH 560 may also include sidelink control information (SCI), such as SCI 0_1. The SCI may include information about bandwidth, one or more resource reservations, COT information, COT sharing information, the source ID of the TX UE 115k, or a combination thereof.

[0082] Additionally, in procedure flow 550, RX UE 115j performs blind decoding of one or more sub-channels to detect PSCCH 560. In procedure flow 550, after transmitting PSCCH 560, TX UE 115k may transmit PSSCH (not shown) to RX UE 115j. In some implementations, PSCCH 560 and PSSCH are transmitted in the same time slot. PSSCH may include an SCI that includes or indicates a source ID (associated with TX UE 115k) and a destination ID (associated with RX UE 115j), which is used to distinguish whether a packet is addressed to RX UE 115j and from which TX UE. After PSSCH is transmitted by TX UE 115k, RX UE 115j may transmit PSFCH to TX UE 115k.

[0083] This disclosure provides systems, apparatus, methods, and computer-readable media for COT sharing propagation. For illustration, a first UE may initiate a COT and may transmit a first message including sharing information associated with the COT and the source ID of the first UE. For example, the first message may include a first SCI. The first message may be received by a second UE and may be missed by a third UE (e.g., not received by the third UE). The second UE may transmit a second message to relay the sharing information to one or more other UEs (such as the third UE). The second message may include the sharing information and the source ID of the first UE. The third UE may receive the second message and identify the source ID of the first UE, the sharing information, or a combination thereof. The third UE may determine whether to attempt to access a resource during the COT based on the received second message. For example, the third UE may determine whether to attempt to access a resource based on distance (e.g., absolute physical distance or relative physical distance), signal strength (e.g., RSRP, RSSI, or path loss measured based on a sidelink between the third UE and the first UE), ED value, or a combination thereof. For illustration, the third UE may compare the distance, signal strength, or ED value with one or more thresholds to determine whether to attempt to access a resource during the COT.

[0084] In some implementations, the third UE may determine or identify a set of conditions to be met for the third UE to attempt access to the first resource during the first COT, based on whether the third UE directly receives the first message from the first UE. For example, if the third UE does not directly receive the first message from the first UE, the condition set may indicate that the third UE needs to meet a first distance requirement (e.g., a first distance threshold), a first signal strength requirement (e.g., a first signal strength threshold), a first ED requirement (e.g., a first ED threshold), or a combination thereof. Alternatively, if the third UE directly receives the first message from the first UE, the condition set may indicate that the UE needs to meet a second distance requirement (e.g., a second distance threshold), a second signal strength requirement (e.g., a second signal strength threshold), a second ED requirement (e.g., a second ED threshold), or a combination thereof.

[0085] Specific implementations of the subject matter described in this disclosure may be implemented to achieve one or more of the following potential advantages. In some aspects, this disclosure provides COT sharing propagation. For example, a second UE may propagate sharing information (e.g., COT sharing information), which may enable a third UE or another device that missed receiving the sharing information directly from the first UE (e.g., the COT originator) to still attempt to access resources during COT.

[0086] Figure 4 This is a block diagram of an example wireless communication system 300 for V2X messaging. In some examples, the wireless communication network 300 may implement aspects of the wireless system 100. The wireless communication system 300 includes UE 115, base station 105, UE 320, and UE 360. UE 115, 320, or 360 may include or correspond to V2X entities, such as... Figure 1 The UEs are 115i, 115j, or 115k. Although three UEs and one base station are described, in some other implementations, the wireless communication system 300 may generally include fewer or more than three UEs and may include more than one base station or not include a base station.

[0087] In some implementations, wireless communication system 300 includes a V2X wireless communication system or an Industrial Internet of Things (IIoT) wireless communication system. V2X is a communication system within which information is exchanged between vehicles and other entities within a wireless communication network providing V2X services. V2X services may include those for vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), vehicle-to-infrastructure (V2I), and vehicle-to-network (V2N). One or more V2X standards are designed to develop or support advanced driver assistance systems (ADAS) that assist drivers in making critical decisions, such as lane changes, speed changes, and overtaking speeds. Low latency communication can be used in V2X and is therefore suitable for precise positioning. For example, positioning technologies such as Time of Arrival (TOA), Time Difference of Arrival (TDOA), or Observed Time Difference of Arrival (OTDOA) or any other cellular positioning technology can be enhanced using assistance from V2X. V2X wireless communication systems can utilize cellular-based communication or wireless local area network (WLAN) communication. To explain, Cellular V2X (C-V2X) is a 3GPP (3rd Generation Partnership Project) standard that uses 3GPP-standardized 4G LTE or 5G mobile cellular connectivity to send and receive signals from vehicles to other vehicles, pedestrians, or fixed objects in their vicinity, such as traffic lights.

[0088] Generally, there are two operating modes for V2X services, as defined in 3GPP TS23.285. One operating mode uses direct wireless communication between V2X entities when they are within each other's range. The other operating mode uses network-based wireless communication between entities. These two operating modes can be combined, or other operating modes can be used if needed.

[0089] Wireless communication in V2X wireless communication systems can be achieved through proximity-based service (ProSe) direct communication (PC5) reference points as defined in 3GPP TS 23.303, and can also be achieved through wireless communication over other wireless connections between entities, such as those defined by the Institute of Electrical and Electronics Engineers (IEEE) 1609, Wireless Access in Vehicular Environments (WAVE), Intelligent Transportation Systems (ITS), and IEEE 802.11p, on the 5.9 GHz ITS band.

[0090] UE 115 (such as the first UE) may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include one or more processors 302 (hereinafter collectively referred to as “processor 302”), one or more memory devices 304 (hereinafter collectively referred to as “memory 304”), one or more transmitters 316 (hereinafter collectively referred to as “transmitter 316”), and one or more receivers 318 (hereinafter collectively referred to as “receiver 318”). In some implementations, UE 115 may also include one or more additional components, such as a modem. Processor 302 may be configured to execute instructions stored in memory 304 to perform the operations described herein. In some implementations, processor 302 includes or corresponds to one or more of receive processor 258, transmit processor 264, and controller / processor 280, and memory 304 includes or corresponds to memory 282.

[0091] Memory 282 includes location information 306, ID information 308, and COT information 310. Location information 312 can indicate the location of UE 115, the location of another UE, or a combination thereof. One or more locations included in location information 312 can be represented as coordinates, a region or region ID, a district or district ID, or a combination thereof. For example, UE 115 may include a Global Positioning System (GPS) configured to determine the latitude, longitude, altitude, or a combination thereof of UE 115. For illustration, the location may be a Global Navigation Satellite System (GNSS) location.

[0092] ID information 308 may include the source ID of UE 115, base station 105, one or more other UEs (such as UE 320, UE 360) or a combination thereof. COT information 310 indicates the bandwidth or channel associated with the COT, the start time / location of the COT, the duration of the COT, the end time / location of the COT or a combination thereof.

[0093] Transmitter 316 is configured to transmit data to one or more other devices, and receiver 318 is configured to receive data from one or more other devices. For example, transmitter 316 may transmit data to base station 105 or UE 320 or 360, while receiver 318 may receive data from base station 105 or UE 320 or 360. In some implementations, transmitter 316 and receiver 318 may be integrated into one or more transceivers. Additionally or alternatively, transmitter 316, receiver 318, or both may include or correspond to references. Figure 2 One or more components of the described UE 115.

[0094] Base station 105 may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include one or more processors 352 (hereinafter collectively referred to as "processor 352"), one or more memory devices 354 (hereinafter collectively referred to as "memory 354"), one or more transmitters 356 (hereinafter collectively referred to as "transmitter 356"), and one or more receivers 358 (hereinafter collectively referred to as "receiver 358"). Processor 352 may be configured to execute instructions stored in memory 354 to perform the operations described herein. In some implementations, processor 352 includes or corresponds to one or more of receiver processor 238, transmitter processor 220, and controller / processor 240, and memory 354 includes or corresponds to memory 242.

[0095] Transmitter 356 is configured to transmit data to one or more other devices, and receiver 358 is configured to receive data from one or more other devices. For example, transmitter 356 may transmit data to UE 115, 320, or 360, while receiver 358 may receive data from UE 115, 320, or 360. In some implementations, transmitter 356 and receiver 358 may be integrated into one or more transceivers. Additionally or alternatively, transmitter 356, receiver 358, or both may include or correspond to references. Figure 2 One or more components of the described base station 105.

[0096] UE 320 (such as a second UE) may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include one or more processors 322 (hereinafter collectively referred to as “processor 322”), one or more memory devices 324 (hereinafter collectively referred to as “memory 324”), one or more transmitters 326 (hereinafter collectively referred to as “transmitter 326”), and one or more receivers 328 (hereinafter collectively referred to as “receiver 368”). In some implementations, UE 320 may include one or more additional components, such as sensors (e.g., temperature sensors) and modems, as illustrative and non-limiting examples. Processor 322 may be configured to execute instructions stored in memory 324 to perform the operations described herein. In some implementations, processor 322 includes or corresponds to one or more of receive processor 258, transmit processor 264, and controller / processor 280, and memory 324 includes or corresponds to memory 282.

[0097] The memory 324 includes one or more thresholds 330 (collectively referred to as "thresholds 330"), location information 332, and ID information 334. Thresholds 330 may include one or more distance thresholds, one or more signal strength thresholds, one or more energy detection (ED) thresholds, one or more temperature thresholds, one or more other thresholds, or combinations thereof, as illustrative and non-limiting examples.

[0098] Location information 332 may include or correspond to location information 306. For example, location information 332 may include or indicate the location of base station 105, UE 115, 320, or 360, or a combination thereof. In some implementations, UE 320 may include a Global Positioning System (GPS) configured to determine the latitude, longitude, altitude, or a combination thereof of UE 320. For illustration, the location may be a Global Navigation Satellite System (GNSS) location. ID information 334 may include or correspond to ID information 308. ID information 334 may include the source ID of UE 320, base station 105, one or more other UEs (such as UE 115, UE 360), or a combination thereof.

[0099] Transmitter 326 is configured to transmit data to one or more other devices, and receiver 328 is configured to receive data from one or more other devices. For example, transmitter 326 may transmit data to base station 105 or UE 320 or 360, while receiver 326 may receive data from base station 105 or UE 320 or 360. In some implementations, transmitter 326 and receiver 328 may be integrated into one or more transceivers. Additionally or alternatively, transmitter 326, receiver 328, or both may include or correspond to references. Figure 2 One or more components of the described UE 115.

[0100] UE 360 (such as a third UE) may include various components (such as architecture, hardware components) for performing one or more of the functions described herein. For example, these components may include one or more processors 362 (hereinafter collectively referred to as “processor 362”), one or more memory devices 364 (hereinafter collectively referred to as “memory 364”), one or more transmitters 366 (hereinafter collectively referred to as “transmitter 366”), and one or more receivers 368 (hereinafter collectively referred to as “receiver 368”). In some implementations, UE 320 may include one or more additional components, such as sensors (e.g., temperature sensors) and modems, as illustrative and non-limiting examples. Processor 362 may be configured to execute instructions stored in memory 364 to perform the operations described herein. In some implementations, processor 362 includes or corresponds to one or more of receive processor 258, transmit processor 264, and controller / processor 280, and memory 364 includes or corresponds to memory 282.

[0101] Memory 464 includes one or more thresholds 370 (collectively referred to as "thresholds 370"), location information 372, ID information 374, signal information 376, and ED information 378. Threshold 370 may include or correspond to threshold 330. Threshold 370 may include one or more distance thresholds, one or more signal strength thresholds, one or more energy detection (ED) thresholds, one or more temperature thresholds, one or more other thresholds, or combinations thereof, as illustrative and non-limiting examples. The one or more distance thresholds may include absolute distance thresholds (such as distance values ​​in meters or feet) or relative distance thresholds (such as the number of zones). In some implementations, a relative distance threshold may be set such that two devices need to be in the same zone, adjacent zones, or adjacent zones.

[0102] Location information 372 may include or correspond to location information 306 or 332. For example, location information 372 may include or indicate the location of base station 105, UE 115, 320, or 360, or a combination thereof. In some implementations, UE 360 may include a Global Positioning System (GPS) configured to determine the latitude, longitude, altitude, or a combination thereof of UE 360. For illustration, the location may be a Global Navigation Satellite System (GNSS) location. ID information 374 may include or correspond to ID information 308 or 334. ID information 374 may include the source ID of UE 360, base station 105, one or more other UEs (such as UE 115, UE 320), or a combination thereof.

[0103] Signal information 376 may indicate signal strength (e.g., Reference Received Power (RSRP), Received Signal Strength Indicator (RSSI), or path loss based on sidelink measurements between two UEs (such as UE 115 and UE 360). ED information 378 may indicate an ED value determined based on ED operation.

[0104] Transmitter 366 is configured to transmit data to one or more other devices, and receiver 368 is configured to receive data from one or more other devices. For example, transmitter 366 may transmit data to base station 105 or UE 115 or 320, while receiver 368 may receive data from base station 105 or UE 115 or 320. In some implementations, transmitter 366 and receiver 368 may be integrated into one or more transceivers. Additionally or alternatively, transmitter 366, receiver 368, or both may include or correspond to references. Figure 2 One or more components of the described UE 115.

[0105] In some implementations, a UE (such as UE 115, 320, or 360) may include or correspond to a Roadside Unit (RSU). An RSU may include a resident infrastructure entity that supports V2X applications and is capable of exchanging messages with other entities that support V2X applications. An RSU may be a logical entity that combines V2X application logic with the functionality of an eNB (referred to as an eNB-type RSU) or with the functionality of a UE (referred to as a UE-type RSU).

[0106] In some implementations, the wireless communication system 300 implements a 5G New Radio (NR) network. For example, UE 115 may include a UE with 5G capability and a base station with 5G capability, such as a UE and a base station configured to operate according to 5G NR network protocols (such as those defined by the 3rd Generation Partnership Project (3GPP)).

[0107] Multiple UEs can share a set of resources in unlicensed spectrum for sidelink communication. This set of resources can be resources within or during a COT. A COT can span multiple time slots and comprise several resource blocks in frequency. A COT can be initiated by a UE, or a network node (e.g., a UE, base station, roadside unit (RSU)) can initiate a COT based on an LBT. COT sharing can allow for better media access in sidelink communication because transmissions within a COT do not necessarily use a Type 1 LBT. For example, the COT originator performs a Type 1 LBT, and devices sharing a COT can use a more permissive Type 2 LBT to access the COT. However, COT sharing can cause problems in distributed systems (e.g., Mode 2 V2X communication). For example, one problem could be interference propagation where devices sharing a COT begin transmissions during a COT without a Type 1 LBT.

[0108] During the operation of the wireless communication system 300, UE 115, UE 320, and UE 360 can broadcast and receive messages from one or more other UEs. UE 115 can access resources and retain resource time periods, such as COT. Therefore, UE 115 can be the originator of COT. UE 115 can transmit a first message 382 associated with COT to enable COT sharing by one or more other devices (such as one or more UEs). The first message 382 may include a source ID 383 of UE 115 and sharing information 384. The source ID 383 may be associated with ID information 308, and the sharing information 384 may be associated with COT information 310. In some implementations, the first message 382 may include or correspond to a first SCI. Additionally or alternatively, the first message 382 may include location information, thresholds, or a combination thereof. The location information may include or correspond to location information 306, and the threshold may include one or more ED thresholds. In some implementations, the one or more ED thresholds may establish the COT sharing range associated with COT.

[0109] The first message 382 may be received by UE 320 and may be missed by UE 360 (e.g., not received by UE 360). For the purposes of explanation, UE 360 may fail to receive the first message 382 due to interference, because UE 360 is outside the range of receiving the first message 382, ​​or because it is transmitted at the same time as the first message 382 is being transmitted, or because it conflicts with at least a portion of the first message 382 (e.g., SCI), or a combination thereof.

[0110] UE 320 may transmit a second message 390 to propagate shared information 384 from UE 115 (e.g., the originator of COT) to one or more other UEs (such as UE 360). For example, the second message 390 may include shared information 384, source ID 383 of UE 115, and source ID 392 of UE 320. For example, source ID 383 may include one or more bits on the SCI (e.g., 8 bits) – for example, the SCI may be 40 bits, 48 ​​bits, or another number of bits. In some implementations, the second message 390 may include or correspond to a second SCI (such as SCI-2). Alternatively or additionally, the second message 390 may include location information, a threshold, or a combination thereof. Location information may include or correspond to location information 3332, and the threshold may include or correspond to threshold 330. In some implementations, the second message 390 may include an ED threshold, such as an ED threshold from UE 115. By propagating shared information 384, UE 320 enables UE 360 (which missed the first message 382) to share COT.

[0111] In some implementations, UE 320 can determine whether it is eligible to propagate the sharing information 384. For example, UE 320 can determine its eligibility based on an ED threshold. To explain, UE 320 can perform an ED operation to determine an ED value and compare that ED value with an ED threshold. The ED value can be determined before or after receiving the first message 382. If UE 320 meets the ED threshold (e.g., UE 320 is within or within the sharing range), then UE 320 can propagate the sharing information 384. Alternatively, if UE 320 does not meet the ED threshold (e.g., UE 320 is outside the sharing range), then UE 320 may not propagate the sharing information 384.

[0112] UE 360 may receive a second message 390, identifying UE 115's source ID 383, shared information 384, or a combination thereof. UE 360 may determine whether to attempt resource access during COT based on the received second message 390 (such as based on UE 115's source ID 383). For example, UE 360 may determine whether to attempt resource access based on distance (e.g., absolute physical distance or relative physical distance), signal strength (e.g., RSRP, RSSI, or path loss measured based on the sidelink between UE 360 and UE 115), ED value, or a combination thereof. To illustrate, UE 320 may compare distance, signal strength, or ED value with one or more thresholds to determine whether to attempt resource access during COT. UE 360 may determine the distance between UE 360 and UE 115 based on UE 115's source ID 383. For example, UE 360 may access location information 372 to determine UE 115's location information. The location information of UE 115 may have been received before the second message 390 was received, or may have been included in the second message. Additionally or alternatively, UE 360 may determine the signal strength between UE 360 and UE 115 based on the source ID 383 of UE 115. For example, UE 360 may access signal information 376 based on source ID 383 to determine the signal strength, or may measure the signal strength of a signal received from UE 115 based on source ID 383. To illustrate, UE 360 may receive one or more communications from UE 115 before the first message, and may have already determined the signal strength associated with UE 115 based on those communications. The one or more communications from UE 115 may include the source ID 838 of UE 115, the location information of UE 115, or a combination thereof. Additionally or alternatively, UE 360 may determine the ED value by accessing ED information 378 or by performing an ED operation.

[0113] In some implementations, UE 360 may determine or identify a set of conditions to be met for UE 360 to attempt access to resources during COT based on whether UE 360 directly received the first message 382 from UE 115. For example, if UE 360 did not directly receive the first message 382 from UE 115, the set of conditions may indicate that UE 360 will meet a first distance requirement (e.g., a first distance threshold), a first signal strength requirement (e.g., a first signal strength threshold), a first ED requirement (e.g., a first ED threshold), or a combination thereof. Alternatively, if UE 360 directly received the first message 382 from UE 115, the set of conditions may indicate that UE 360 will meet a second distance requirement (e.g., a second distance threshold), a second signal strength requirement (e.g., a second signal strength threshold), a second ED requirement (e.g., a second ED threshold), or a combination thereof. To meet the distance requirement, the distance between UE 360 and the COT originator (e.g., UE 115) is less than or equal to the distance threshold. To meet signal strength requirements, the signal strength between UE 360 and the COT originator (e.g., UE 115) must be greater than or equal to a signal strength threshold. To meet ED requirements, the ED value measured by UE 360 must be less than or equal to an ED threshold.

[0114] UE 360 may attempt to access a resource during COT. For example, UE 360 attempts to and acquires access to a resource, and transmits message 397 via that resource during COT.

[0115] In some implementations, base station 105 may transmit RRC message 380 (indicated by dashed lines to show that it is an optional message), which includes or indicates one or more thresholds, such as threshold 330 or 370. RRC message 380 may be received by one or more UEs (such as UE 115, 320 or 360).

[0116] In some implementations, the apparatus (such as UE 320) includes a transceiver configured to receive a first message 382 from a first device (such as UE 115). The first device includes the originator of a first COT. The apparatus further includes at least one processor (e.g., 322) and a memory 324 coupled to the at least one processor and storing processor-readable instructions configured, when executed by the at least one processor, to initiate the transmission of a second message 390 including the source ID 383 of the first device.

[0117] In some implementations, the apparatus (such as UE 360) includes a transceiver configured to receive a message (e.g., 390) including a source ID 383 of a first device (such as UE 115). The first device includes the originator of the COT. The apparatus further includes at least one processor (e.g., 362) and a memory 364 coupled to the at least one processor and storing processor-readable instructions configured, when executed by the at least one processor, to determine, based on the source ID 383, whether to attempt to access resources during the COT.

[0118] In some implementations of the wireless communication system 300, one or more of the UEs 115, 320, and 360 may include various forms of IoT devices, such as IIoT devices, that communicate via the wireless link of the wireless communication system 300. For example, some deployed IIoT devices may include sensors (e.g., position sensors, temperature sensors, pressure sensors, power sensors, motion detectors, proximity detectors, accelerometers, scanners, cameras, probes, switches, etc.), actuators (e.g., linear actuators, rotary actuators, servo mechanisms, solenoids, stepper motors, motors, comb-driven actuators, etc.), or combinations thereof. A large number of IIoT devices may communicate with corresponding devices (e.g., industrial controllers (e.g., computers, programmable logic controllers (PLCs), supervisory control and data acquisition (SCADA) systems, etc.)) in industrial environments (e.g., manufacturing facilities, material handling facilities, warehouses, etc.). For example, a PLC can communicate with 20-100 or more sensors and / or actuators (S / A), and 1-1000 such PLCs can be deployed throughout an industrial (e.g., manufacturing) facility.

[0119] therefore, Figure 4 COT sharing propagation is described. For example, UE 320 can propagate sharing information (e.g., COT sharing information), which can enable UE 360 or another device that missed receiving sharing information 384 directly from UE 115 (e.g., the COT originator) to attempt to access resources during COT.

[0120] Figure 5 This is a diagram illustrating an example of COT shared propagation. A wireless communication system (such as wireless communication system 300) for V2X messaging communication includes a first UE 571 (designated UE1), a second UE 572 (designated UE2), and a third UE 573 (designated UE3). The first UE 571, the second UE 572, and the third UE 573 may include or correspond to UE 115, UE 320, and UE 360, respectively.

[0121] The first UE 571 may initiate a COT and may transmit (as indicated by arrows 580 and 582) a first message including shared information associated with the COT and the source ID of the first UE 571. For example, the first message, shared information, and source ID may include or correspond to first message 382, ​​shared information 384, and source ID 383. The first message may include a first SCI. In some implementations, the first message may also indicate a COT sharing range 575. For example, the COT sharing range 575 may correspond to an ED threshold indicated by the first message.

[0122] The first message may be received by the second UE 572, as indicated by the first arrow 580, and may be missed by the third UE 573 (e.g., not received by the third UE 573), as indicated by the second arrow 582. As indicated by the third arrow 584, the second UE 572 may transmit a second message to transfer shared information from the first UE 571 (e.g., the originator of the COT) to one or more other UEs (such as the third UE 573). For example, the second message may include or correspond to second message 390. The second message may include shared information and the source ID of the first UE. Additionally or alternatively, the second message may include an ED threshold.

[0123] The third UE 573 may receive a second message and identify the source ID, shared information, or a combination thereof of the first UE 571. The third UE 573 may determine whether to attempt resource access during COT based on the received second message. For example, the third UE 573 may determine whether to attempt resource access based on distance (e.g., absolute physical distance or relative physical distance), signal strength (e.g., RSRP, RSSI, or path loss measured based on the sidelink between the third UE 573 and the first UE 571), ED value, or a combination thereof. To illustrate, the third UE 573 may compare the distance, signal strength, or ED value to one or more thresholds to determine whether to attempt resource access during COT.

[0124] In some implementations, the third UE 573 may determine or identify a set of conditions to be met for the third UE 573 to attempt access to resources during COT, based on whether the third UE 573 received the first message directly from the first UE 571. For example, if the third UE 573 did not receive the first message directly from the first UE 571, the set of conditions may indicate that the third UE 573 will meet a first distance requirement (e.g., a first distance threshold), a first signal strength requirement (e.g., a first signal strength threshold), a first ED requirement (e.g., a first ED threshold), or a combination thereof. Alternatively, if the third UE 573 received the first message directly from the first UE 571, the set of conditions may indicate that the third UE 573 will meet a second distance requirement (e.g., a second distance threshold), a second signal strength requirement (e.g., a second signal strength threshold), a second ED requirement (e.g., a second ED threshold), or a combination thereof.

[0125] Figure 6 This is a flowchart illustrating example process 600 for UE operation used in communication. The UE may include or correspond to Figure 1 , 2 UE 115, UE 320, 360, UE 3A, 3B or 4 Figure 5 The UE or another device, such as an RSU, PLC, or S / A device. The UE can be configured for V2X communication. For example, V2X communication may include C-V2X communication.

[0126] As explained in box 602, the UE receives a first message from a first device, which includes the originator of a first COT. For example, the first message may include or correspond to first message 382.

[0127] In some implementations, the first message includes a first SCI from the first device. Additionally or alternatively, the first message may include the source ID of the first device, shared information associated with the first COT, location information associated with the first device, an indication of a threshold, or a combination thereof. The source ID of the first device and the shared information associated with the first COT may include or correspond to source ID 383 and shared information 384, respectively. The location information associated with the first device may include or correspond to location information 306. For example, the location information may include coordinates associated with the first device, a district identifier associated with the first device, or a combination thereof. The threshold may include or correspond to threshold 330. In some implementations, the UE may detect the source ID of the first device, the shared information associated with the first COT, or a combination thereof, based on the first message.

[0128] In box 604, the UE transmits a second message including the source ID of the first device. For example, the second message may include or correspond to second message 390. The source ID of the first device may include or correspond to source ID 383.

[0129] In some implementations, the second message includes a second SCI. Additionally or alternatively, the second message may include the UE's source ID, shared information associated with the first COT, location information associated with the first device, an indication of a threshold, or a combination thereof. The UE's source ID may include or correspond to source ID 392. The threshold may include one or more distance thresholds, one or more signal strength thresholds, ED thresholds, or a combination thereof. The threshold may include or correspond to threshold 330. In some implementations, the UE may receive an RRC message from a base station, and the RRC message may include an indication of a threshold. For example, the RRC message and the base station may include or correspond to RRC message 380 and base station 105, respectively.

[0130] In some implementations, the UE determines whether to transmit a second message.

[0131] To determine whether to transmit a second message, the UE can determine an ED value and perform a comparison based on that ED value and a threshold. The determination to transmit the second message can be based on the result of this comparison. In some additional implementations, the UE can select a threshold based on determining that it has directly received shared information associated with the first COT from the first device. If the UE directly receives shared information from the first device, the UE can select a first threshold. Alternatively, if the UE does not directly receive shared information from the first device, the UE can select a second threshold that is more restrictive than the first threshold.

[0132] In some implementations, after the first COT expires, the UE can receive a third message from a third device. This third message includes the source ID of a fourth device and second shared information associated with the second COT. The fourth device may include the originator of the second COT. The UE can determine whether to attempt to access resources during the second COT based on the source ID of the fourth device. In some implementations, the UE may have missed receiving the second shared information associated with the second COT directly from the fourth device before receiving the third message.

[0133] Figure 7 This is a flowchart illustrating example process 700 for UE operation used in communication. The UE may include or correspond to Figure 1 , 2 UE 115, UE 320, 360, UE 3A, 3B or 4 Figure 5 The UE or another device, such as an RSU, PLC, or S / A device. The UE can be configured for V2X communication. For example, V2X communication may include C-V2X communication.

[0134] As explained in box 702, the UE receives a message including a source ID of a first device, which includes the originator of a first COT. For example, the message and the source ID may include or correspond to a second message 390 and a source ID 383, respectively. In some implementations, the message further includes shared information, location information, or a combination thereof associated with the first COT. The shared information associated with the first COT may include or correspond to shared information 384. The location information may include first coordinates of the first device, a first zone ID associated with the first device, or a combination thereof. For example, the location information may include or correspond to location information 306, 332, or 372.

[0135] In some implementations, the UE determines the source ID of the first device based on a message, and determines shared information or a combination thereof associated with the first COT based on the message. Alternatively or additionally, the UE may identify the first device based on the source ID of the first device.

[0136] In some implementations, the message is received from a second device and includes sidelink control information associated with the first device. For example, the sidelink control information may include or correspond to the first message 382 associated with UE 115. Additionally or alternatively, the UE may have missed receiving the sidelink control information directly from the first device before receiving the message. For example, the UE may have missed receiving the first message 382 directly from UE 115.

[0137] In box 704, the UE determines whether to attempt access to the first resource during the first COT based on the source ID. In some implementations, the UE may determine whether to attempt access to the first resource and may perform one or more operations during the first COT to attempt access to the first resource.

[0138] In some implementations, the UE determines the distance between itself and a first device. This distance can be determined based on location information. The distance can be an absolute distance or a relative distance. The UE can determine the distance based on a first coordinate of the first device, a first segment ID associated with the first device, a second coordinate of the UE, a second segment ID associated with the UE, or a combination thereof. In some implementations, the UE performs a first comparison based on the distance and a first threshold. The UE can determine whether to attempt access to the first resource during a first COT based on the result of the first comparison. For example, the UE can attempt access to the first resource during the first COT based on the distance meeting the first threshold. To explain, if the distance is less than or equal to the first threshold, then the distance meets the first threshold.

[0139] In some implementations, the UE determines the signal strength associated with the first device and the UE. For example, the signal strength may include or correspond to signal information 376. In some implementations, the UE may determine the signal strength by measuring one or more sidelink communications between the first device and the UE based on the source ID. The signal strength may be associated with RSRP, RSSI, or path loss. Additionally or alternatively, the UE may perform a second comparison based on the signal strength and a second threshold. The UE may determine whether to attempt access to the first resource during the first COT based on the result of the second comparison. For example, the UE may attempt access to the first resource during the first COT based on the signal strength meeting the second threshold. To explain, if the signal strength is less than or equal to the second threshold, then the signal strength meets the second threshold.

[0140] In some implementations, the UE determines an ED value. The UE value may include or correspond to ED information 378. The UE may perform a third comparison based on the ED value and an ED threshold. The ED threshold may include or correspond to thresholds 330 or 370. The ED threshold may be determined by the UE based on a message, an RRC message received by the UE, or a combination thereof. The RRC message may include or correspond to RRC message 380. The UE may determine whether to attempt access to the first resource during the first COT period based on the result of the third comparison. For example, the UE may attempt access to the first resource during the first COT period based on the ED meeting the ED threshold. To explain, if the ED value is less than or equal to the ED threshold, then the ED value meets the ED threshold.

[0141] In some implementations, the UE receives one or more thresholds. These thresholds may include or correspond to thresholds 330 or 370. The thresholds may include one or more distance thresholds, one or more signal strength thresholds, one or more ED thresholds, or combinations thereof. The UE may select at least one of these thresholds based on whether it receives control information (such as sharing information or sidelink control information) directly from the first device. Additionally or alternatively, the UE may determine or identify a set of conditions to be met for the UE to attempt access to the first resource during the first COT, based on whether it receives control information directly from the first device. For example, the set of conditions may indicate that the UE needs to meet a distance requirement (e.g., a first threshold), a signal strength requirement (e.g., a second threshold), or a combination thereof, independently of an ED requirement (e.g., an ED threshold). As another example, the set of conditions may indicate that the UE needs to meet an ED requirement (e.g., an ED threshold) alone or in combination with meeting one of the distance requirement (e.g., a first threshold) or the signal strength requirement (e.g., a second threshold).

[0142] In some implementations, the UE receives a second message from a third device. The third device may be the originator of the second COT. The second message may include sidelink control information, which includes the source ID of the third device and shared information associated with the second COT. The UE may transmit a third message including the UE's source ID, the source ID of the third device, the shared information associated with the second COT, or a combination thereof.

[0143] therefore, Figure 6 and 7 Each process enables the UE to perform COT share propagation operations. As described herein, by propagating COT shares (such as COT share information), one or more UEs can reduce power consumption, reduce processor or modem operation, or a combination thereof. Additionally, a UE that receives share information directly from the originating UE can propagate that share information so that another device that missed receiving share information directly from the COT originator can still attempt to access resources during COT.

[0144] Although processes 600 and 700 are described as being executed by the UE, in some other implementations, Figure 6 The process described in step 7 can be performed by a device configured for wireless communication. For example, the device may include at least one processor and memory coupled to the processor. The processor may be configured to perform... Figure 6 Or the operation of one or more processes of 7. Additionally or alternatively, Figure 6 or Figure 7 The process can be configured to be executed by a modem (such as the modem's control logic or processor) or a PLC. In some other implementations, Figure 6 or Figure 7 The process can be executed or run using a non-transitory computer-readable medium on which program code is recorded. The program code can be executable by a computer to cause that computer to perform... Figure 6 or Figure 7 Program code that performs one or more procedures.

[0145] Note that, reference Figure 6 One or more boxes (or operations) described in Figure 7 may be combined with one or more boxes (or operations) in another figure. For example, Figure 6 One or more boxes (or operations) can be combined with Figure 7 A combination of one or more boxes (or operations). As another example, Figure 6 Or one or more boxes of 7 can be with Figure 2 , 3A A combination of one or more boxes (or operations) from another of 3B, 4, or 5. Additionally or alternatively, refer to the above. Figure 1-7 One or more operations described can be compared with the reference Figure 8 One or more of the operations described in the text.

[0146] Figure 8 This is a block diagram of an example UE 800 that supports COT sharing propagation in several aspects. The UE 800 can be configured to perform operations, including referencing... Figure 6 Or, as described in section 7, the process for performing COT sharing propagation. In some implementations, UE 800 includes references... Figure 2 The structure, hardware, and components shown and described in UE 115 (or UE 4) are as follows. For example, UE 800 includes a controller 280 that operates to execute logical or computer instructions stored in memory 282, and various components that control UE 800 and provide the features and functionality of UE 800. Under the control of controller 280, UE 800 transmits and receives signals via wireless radio 801a-r and antenna 252a-r. Wireless radio 801a-r includes various components and hardware, such as those shown in… Figure 2 The components described in the text regarding UE 115 include modulators and demodulators 254a-r, MIMO detector 256, receiver processor 258, transmitter processor 264, and TX MIMO processor 266. The UE may also include sensors 820, such as temperature sensors configured to detect the temperature of one or more components of the UE 800.

[0147] As shown in the figure, the memory 282 may include location information 802, ID information 803, COT information 804, one or more thresholds 805, signal information 806, and ED information 807. Location information 802 may include or correspond to location information 306, 332, or 372, or shared information 384. ID information 803 may include or correspond to ID information 308, 334, or 374, source ID 383, source ID 392, or shared information 384. COT information 804 may include or correspond to COT information 310 or shared information 384. The one or more thresholds 805 may include or correspond to thresholds 330, 370, shared information 384, or RRC message 380. Signal information 806 may include or correspond to signal information 376. ED information 807 may include or correspond to ED information 378. The UE 800 can access data from one or more devices (such as...) Figure 1 , 2 The base station 105, UE 115, 320, 360, another network device (such as RSU, PLC or S / A device, or a combination thereof) of 3A, 3B and 4 receive signals or transmit signals to the one or more such devices.

[0148] In some aspects, the techniques for supporting COT sharing propagation may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes or devices described elsewhere herein. In a first aspect, the techniques for supporting COT sharing propagation may include receiving a first message from a first device, which includes the originator of a first COT, by a wireless communication device; and transmitting a second message including the source ID of the first device. In some examples, the techniques in the first aspect may be implemented in a method or process. In some other examples, the techniques of the first aspect may be implemented in a wireless communication device (such as a UE (or a component of a UE), RSU, network entity, PLC, or sensor or actuator device, as illustrative and non-limiting examples). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, modem, or other component) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with reference to the wireless communication device. In some examples, the memory device includes a non-transient computer-readable medium thereon storing program code that, when executed by the processing unit, is configured to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, a wireless communication device may include one or more means configured to perform the operations described herein.

[0149] In a second aspect, in conjunction with the first aspect, the first message includes a first SCI from the first device, and the second message includes a second SCI, or a combination thereof.

[0150] In a third aspect, in conjunction with the first or second aspect, the first message includes the source ID of the first device, shared information associated with the first COT, or a combination thereof.

[0151] In a fourth aspect, in conjunction with the third aspect, the technology further includes detecting the source ID of the first device, shared information associated with the first COT, or a combination thereof, based on the first message.

[0152] In a fifth aspect, in combination with one or more of the first to fourth aspects, the first message includes location information associated with the first device, an indication of a threshold, or a combination thereof.

[0153] In a sixth aspect, in conjunction with the fifth aspect, the location information includes coordinates associated with the first device, a zone identifier associated with the first device, or a combination thereof.

[0154] In the seventh aspect, in combination with one or more of the first to sixth aspects, the second message further includes the source ID of the wireless communication device, shared information associated with the first COT, or a combination thereof.

[0155] In the eighth aspect, in combination with one or more of the first to seventh aspects, the second message further includes location information associated with the first device, an indication of a threshold, or a combination thereof.

[0156] In the ninth aspect, in conjunction with the eighth aspect, the threshold includes one or more distance thresholds, one or more signal strength thresholds, ED thresholds, or combinations thereof.

[0157] In the tenth aspect, in combination with one or more of the first to ninth aspects, the technology further includes receiving RRC messages from a base station.

[0158] In the eleventh aspect, in conjunction with the tenth aspect, the RRC message includes an indication of a threshold.

[0159] In the twelfth aspect, in combination with one or more of the first to eleventh aspects, the technology further includes: determining whether to transmit a second message.

[0160] In the thirteenth aspect, in conjunction with the twelfth aspect, the technology further includes: selecting the threshold based on determining that the wireless communication device directly receives shared information associated with the first COT from the first device.

[0161] In the fourteenth aspect, in combination with one or more of the twelfth or thirteenth aspects, the technique further includes: determining the ED value.

[0162] In the fifteenth aspect, in conjunction with the fourteenth aspect, the technology further includes: performing comparisons based on ED values ​​and thresholds.

[0163] In the sixteenth aspect, in conjunction with the fifteenth aspect, the determination of whether to transmit the second message is based on the result of this comparison.

[0164] In the seventeenth aspect, in combination with one or more of the first to sixteenth aspects, the technology further includes: after the expiration of the first COT, receiving a third message from a third device, the third message including the source ID of the fourth device and second shared information associated with the second COT.

[0165] In the eighteenth aspect, in conjunction with the seventeenth aspect, the fourth device includes the originator of the second COT.

[0166] In the nineteenth aspect, in conjunction with the eighteenth aspect, the technology further includes: determining whether to attempt to access resources during the second COT based on the source ID of the fourth device.

[0167] In the twentieth aspect, in conjunction with the nineteenth aspect, the wireless communication device misses receiving the second shared information associated with the second COT directly from the fourth device before receiving the third message.

[0168] In the twenty-first aspect, in combination with one or more of the first to twentieth aspects, the wireless communication device is configured for V2X communication.

[0169] In aspect 22, in conjunction with aspect 21, V2X communication includes C-V2X communication.

[0170] In the twentieth aspect, in conjunction with the first aspect, the technology further includes: receiving a second message including a second source ID of a second device, the second device including a second originator of a second COT.

[0171] In aspect twenty-three, and in conjunction with aspect twenty-three, the technology further includes: determining whether to attempt to access resources during the second COT based on the second source ID.

[0172] In the twenty-fourth aspect, in conjunction with the twenty-third aspect, the technology further includes: attempting to access the resource during the second COT.

[0173] In the twenty-fifth aspect, in conjunction with the twenty-fourth aspect, the message is received from a third device and includes sidelink control information associated with the second device, shared information associated with COT, or a combination thereof.

[0174] In the twenty-sixth aspect, in conjunction with the twenty-fifth aspect, the wireless communication device misses the opportunity to receive sidelink information directly from the second device before receiving the second message.

[0175] In the twenty-seventh aspect, in conjunction with the twenty-third aspect, the technology further includes: determining the distance between the wireless communication device and the first device; and performing a first comparison based on the distance and a first threshold.

[0176] In the twentieth aspect, in conjunction with the twentieth aspect, the technology further includes: measuring one or more sidelink communications between the second device and the wireless communication device based on a source ID; determining a signal strength associated with the second device and the wireless communication device based on the measurement of the one or more sidelink communications; and performing a second comparison based on the signal strength and a second threshold.

[0177] In the twenty-ninth aspect, in conjunction with the twenty-eighth aspect, the signal strength is associated with RSRP, RSSI, or path loss.

[0178] In the thirtieth aspect, in conjunction with the twenty-eighth or twenty-ninth aspect, it is determined whether to attempt access to the COT based on the results of the first comparison, the results of the second comparison, or a combination thereof.

[0179] In the thirty-first aspect, in conjunction with the twenty-third aspect, the technique further includes: determining an ED value; and performing a third comparison based on the ED value and an ED threshold.

[0180] In the thirty-second aspect, in conjunction with the thirty-first aspect, the ED threshold is included in the second message, determined based on the RRC message received by the wireless communication device, or a combination thereof.

[0181] In aspect thirty-three, in conjunction with aspect thirty-one or thirty-two, it is determined whether to attempt access to COT based on the results of the third comparison.

[0182] In the thirty-fourth aspect, in conjunction with the thirty-third aspect, the technology further includes: receiving a third message from a fourth device, the fourth device including a third originator of a third COT, the third message including sidelink control information, the sidelink control information including a third source ID of the fourth device and shared information associated with the third COT.

[0183] In the thirty-fifth aspect, in conjunction with the thirty-fourth aspect, the technology further includes: transmitting a fourth message comprising the source ID of the wireless communication device, the source ID of the fourth device, shared information associated with the third COT, or a combination thereof.

[0184] In some aspects, the technology for supporting COT sharing propagation may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes or devices described elsewhere herein. In a thirty-sixth aspect, the technology for supporting COT sharing propagation may include receiving a message including a source ID of a first device by a wireless communication device. The first device includes the originator of the COT. The technology also includes determining, based on the source ID, whether to attempt access to a resource during the COT. In some examples, the technology of the thirty-sixth aspect may be implemented in a method or process. In some other examples, the technology of the thirty-sixth aspect may be implemented in a wireless communication device (such as a UE (or a component of a UE), RSU, network entity, PLC, or sensor or actuator device, as illustrative and non-limiting examples). In some examples, the wireless communication device may include at least one processing unit or system (which may include an application processor, modem, or other component) and at least one memory device coupled to the processing unit. The processing unit may be configured to perform the operations described herein with reference to the wireless communication device. In some examples, the memory device includes a non-transient computer-readable medium thereon storing program code configured, when executed by the processing unit, to cause the wireless communication device to perform the operations described herein. Additionally or alternatively, a wireless communication device may include one or more means configured to perform the operations described herein.

[0185] In the thirty-seventh aspect, in conjunction with the thirty-sixth aspect, the technology further includes: the message is received from the second device and includes side link control information associated with the first device.

[0186] In the thirty-eighth aspect, in conjunction with the thirty-sixth or thirty-seventh aspect, the wireless communication device misses receiving sidelink information directly from the first device before receiving the message.

[0187] In aspect thirty-nine, in combination with one or more of aspects thirty-six to thirty-eight, the technology further includes: determining the source ID of the first device based on the message.

[0188] In the fortieth aspect, in combination with one or more of the thirty-sixth to thirty-ninth aspects, the technology further includes: determining shared information associated with the COT based on the message.

[0189] In the forty-first aspect, in conjunction with the forty-second aspect, the message further includes information sharing.

[0190] In aspect 42, in combination with one or more of aspects 36 to 41, the technology further includes: identifying the first device based on the source ID.

[0191] In aspect 43, in combination with one or more of aspects 36 to 42, the technology further includes: determining the distance between the wireless communication device and the first device.

[0192] In aspect forty-three, in conjunction with aspect forty-three, the distance is determined based on location information, which is included in the message or a combination thereof.

[0193] In aspect forty-five, in conjunction with aspect forty-four, this distance is either an absolute distance or a relative distance.

[0194] In the forty-sixth aspect, in conjunction with the forty-fourth aspect, the location information includes the first coordinates of the first device, the first zone ID associated with the first device, or a combination thereof.

[0195] In the forty-seventh aspect, in conjunction with the forty-fourth aspect, the distance is determined based on the first coordinates of the first device, the first zone ID associated with the first device, the second coordinates of the wireless communication device, the second zone ID associated with the wireless communication device, or a combination thereof.

[0196] In aspect 48, in combination with one or more of aspects 43 to 47, the technique further includes: performing a first comparison based on the distance and a first threshold.

[0197] In aspect 49, in conjunction with aspect 48, the determination of whether to attempt access to the COT is based on the results of the first comparison.

[0198] In the fiftieth aspect, in combination with one or more of the thirty-sixth to forty-eighth aspects, the technology further includes: determining the signal strength associated with the first device and the wireless communication device.

[0199] In the fifty-first aspect, in conjunction with the fifty-second aspect, the signal strength is associated with RSRP, RSSI, or path loss.

[0200] In aspect 52, in conjunction with one or more of aspects 50 to 51, the technology further includes: measuring one or more sidelink communications between the first device and the wireless communication device based on the source ID to determine the signal strength.

[0201] In aspect 53, in conjunction with one or more of aspects 50 to 52, the technique further includes: performing a second comparison based on the signal strength and a second threshold.

[0202] In aspect 54, in conjunction with aspect 53, the determination of whether to attempt access to the COT is based on the results of the second comparison.

[0203] In aspect 55, in combination with one or more of aspects 36 to 54, the technique further includes: determining the ED value.

[0204] In aspect 56, in conjunction with aspect 55, the technology further includes: performing a third comparison based on the ED value and the ED threshold.

[0205] In aspect 57, in conjunction with aspect 56, the determination of whether to attempt access to the COT is based on the results of the third comparison.

[0206] In aspect 58, in conjunction with aspect 57, the ED threshold is included in the message, determined based on the RRC message received by the wireless communication device, or a combination thereof.

[0207] In aspect 59, in combination with one or more of aspects 36 to 58, the technology further includes: receiving one or more thresholds, the one or more thresholds including one or more distance thresholds, one or more signal strength thresholds, one or more ED thresholds, or combinations thereof.

[0208] In the sixtieth aspect, in conjunction with the fifty-ninth aspect, the technology further includes: selecting at least one of the one or more thresholds based on whether the wireless communication device receives control information directly from the first device.

[0209] In the sixty-first aspect, in conjunction with one or more of aspects thirty-six through sixty, the technology further includes: attempting to access the resource during the COT.

[0210] In aspect sixty-two, in combination with one or more of aspects thirty-six to sixty-one, the technology further includes: receiving a second message from a third device.

[0211] In aspect sixty-three, in conjunction with aspect sixty-two, the third equipment includes the originator of the second COT.

[0212] In aspect sixty-four, in conjunction with aspect sixty-three, the second message includes side link control information.

[0213] In aspect sixty-five, in conjunction with aspect sixty-four, the side link control information includes the source ID of the third device and shared information associated with the second COT.

[0214] In the sixty-sixth aspect, in conjunction with the sixty-fifth aspect, the technology further includes: transmitting a third message comprising the source ID of the wireless communication device, the source ID of the third device, shared information associated with the second COT, or a combination thereof.

[0215] Those skilled in the art will understand that information and signals can be represented using any of a variety of different techniques and skills. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0216] This article is about Figure 1-8 The components, functional blocks, and modules described include processors, electronic devices, hardware devices, electronic components, logic circuits, memory, software code, firmware code, and any combination thereof. Furthermore, the features discussed herein can be implemented via dedicated processor circuitry, via executable instructions, or a combination thereof.

[0217] Those skilled in the art will further appreciate that the various illustrative logic blocks, modules, circuits, and algorithmic steps described in conjunction with the disclosure herein can be implemented as electronic hardware, computer software, or a combination of both. To clearly illustrate this interchangeability between hardware and software, the various illustrative components, blocks, modules, circuits, and steps are described above in a generalized form in terms of their functionality. Whether such functionality is implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system. Those skilled in the art may implement the described functionality in different ways for each specific application, but such implementation decisions should not be construed as departing from the scope of this disclosure. Those skilled in the art will also readily recognize that the order or combination of components, methods, or interactions described herein is merely illustrative and that components, methods, or interactions of various aspects of this disclosure may be combined or performed in ways other than those explained and described herein.

[0218] The various descriptive logics, logic blocks, modules, circuits, and algorithmic processes described in conjunction with the implementations disclosed herein can be implemented as electronic hardware, computer software, or a combination of both. This interchangeability between hardware and software has been generally described in terms of its functionality, and is explained in the various descriptive components, blocks, modules, circuits, and processes described above. Whether such functionality is implemented in hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0219] Hardware and data processing apparatuses for implementing the various descriptive logics, logic blocks, modules, and circuits described in conjunction with the aspects disclosed herein may be implemented or executed using general-purpose single-chip or multi-chip processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combination thereof. A general-purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. In some implementations, the processor may be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors cooperating with a DSP core, or any other such configuration. In some implementations, specific processes and methods may be executed by a circuit system dedicated to a given function.

[0220] In one or more aspects, the described functionality may be implemented in hardware, digital electronic circuit systems, computer software, firmware (including the structures disclosed herein and their structural equivalents), or any combination thereof. Implementation of the subject matter described herein may also be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a computer storage medium for execution by a data processing apparatus or for controlling the operation of a data processing apparatus.

[0221] If implemented in software, the functions can be stored or transmitted as one or more instructions or codes on or through a computer-readable medium. The processes of the methods or algorithms disclosed herein can be implemented in a processor-executable software module that can reside on a computer-readable medium. Computer-readable media include both computer storage media and communication media, including any medium that can be implemented to transfer a computer program from one location to another. Storage media can be any available medium accessible to a computer. By way of example and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection can also be properly referred to as a computer-readable medium. As used herein, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs, where disks typically reproduce data magnetically and discs reproduce data optically using lasers. Combinations of the above should also be included within the scope of computer-readable media. Additionally, the operation of a method or algorithm may reside as one of code and instructions, or any combination or set of code and instructions, on a machine-readable and computer-readable medium that may be incorporated into a computer program product.

[0222] Various modifications to the implementations described in this disclosure may be apparent to those skilled in the art, and the general principles defined herein may be applied to other implementations without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the implementations shown herein, but are to be granted the broadest scope consistent with this disclosure, the principles disclosed herein, and the novel features.

[0223] In addition, those skilled in the art will readily appreciate that the terms “upper” and “lower” are sometimes used for the convenience of describing the figures and indicate a relative position corresponding to the orientation of the figures on the correctly oriented page, and may not reflect the true orientation of any device as implemented.

[0224] Some features described in this specification in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented separately or in any suitable sub-combination in multiple implementations. Furthermore, although features may be described above as operating in certain combinations and even originally claimed in this way, one or more features from the claimed combination may be removed from that combination in some cases, and the claimed combination may be for sub-combinations or variations thereof.

[0225] Similarly, although the operations are depicted in a specific order in the accompanying drawings, this should not be construed as requiring such operations to be performed in the specific order shown or sequentially, or requiring the performance of all explained operations to achieve the desired result. Furthermore, the drawings may schematically depict one or more example processes in the form of flowcharts. However, other operations not depicted may be incorporated into the schematically explained example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any explained operation. In some environments, multitasking and parallel processing may be advantageous. Moreover, the separation of the various system components in the implementations described above should not be construed as requiring such separation in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products. Additionally, some other implementations also fall within the scope of the appended claims. In some cases, the actions recited in the claims may be performed in a different order and still achieve the desired result.

[0226] As used herein (including in the claims), the term "or" in a list of two or more items means that any one of the listed items may be used alone, or any combination of two or more listed items may be used. For example, if a composition is described as containing components A, B, or C, then the composition may contain only A; only B; only C; a combination of A and B; a combination of A and C; a combination of B and C; or a combination of A, B, and C. Furthermore, as used herein (including in the claims), "or" in a list of items containing "at least one of" indicates a disjunctive enumeration, such that an enumeration of, for example, "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) or any combination thereof. The term "substantially" is defined as primarily but not necessarily entirely what is specified (and includes what is specified; for example, substantially 90 degrees includes 90 degrees and substantially parallel includes parallel), as understood by one of ordinary skill in the art. In any publicly disclosed implementation, the term “substantially” can be replaced with “within a specified percentage”, where the percentage includes 0.1%, 1%, 5%, or 10%.

[0227] The prior description of this disclosure is provided to enable any person skilled in the art to make or use this disclosure. Various modifications to this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not intended to be limited to the examples and designs described herein, but should be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for performing wireless communication at a first user equipment (UE), comprising: A first message is received from a second UE that initiates a first channel occupancy time (COT), wherein the first message includes one or a combination of the second UE's source identity ID, shared information associated with the first COT, location information associated with the second UE, and an indication of a threshold. as well as A second message including the source ID of the second UE is transmitted to the third UE, wherein: The second message further includes location information associated with the second UE, an indication of the threshold, or a combination thereof; and The thresholds include one or more distance thresholds, one or more signal strength thresholds, energy detection (ED) thresholds, or combinations thereof.

2. The method of claim 1, wherein the first message includes a first side link control SCI from the second UE, and the second message includes a second SCI, or a combination thereof.

3. The method of claim 1, further comprising detecting the source ID of the second UE and shared information associated with the first COT based on the first message.

4. The method of claim 1, wherein the location information includes coordinates associated with the second UE, a zone identifier associated with the second UE, or a combination thereof.

5. The method of claim 1, further comprising: Receive a Radio Resource Configuration (RRC) message from the base station, the RRC message including an indication of a threshold.

6. The method of claim 1, further comprising: Determine whether to transmit the second message; as well as The threshold is selected based on the determination that the first UE directly receives shared information associated with the first COT from the second UE.

7. The method of claim 1, further comprising: The following steps determine whether to transmit the second message: Determine the ED value; as well as The comparison is performed based on the ED value and the threshold. The determination of whether to transmit the second message is based on the result of the comparison.

8. The method of claim 1, further comprising: After the first COT expires, a third message is received from a third device. The third message includes the source ID of a fourth device and second shared information associated with the second COT, wherein the fourth device includes the originator of the second COT. as well as The first UE determines whether to attempt to access resources during the second COT based on the source ID of the fourth device, and wherein, before receiving the third message, the first UE misses receiving the second shared information associated with the second COT directly from the fourth device.

9. The method of claim 1, wherein the first UE is configured for vehicle-to-everything (V2X) communication.

10. The method of claim 1, further comprising: Receive a third message from a third device, the third message including a second source ID of the second device that initiated the second COT; as well as The second source ID is used to determine whether to attempt to access resources during the second COT.

11. The method of claim 10, further comprising: During the second COT, an attempt is made to access the resource; The third message includes sidelink control information associated with the second device and shared information associated with the COT. Before receiving the third message, the first UE missed receiving the sidelink control information directly from the second device.

12. The method of claim 10, further comprising: Determine the distance between the first UE and the second device; as well as A first comparison is performed based on the distance and a first threshold; or The second source ID is used to measure one or more sidelink communications between the second device and the first UE; The signal strength associated with the second device and the first UE is determined based on the measurements of the one or more sidelink communications, wherein the signal strength is associated with a reference received power (RSRP), a received signal strength indicator (RSSI), or a path loss. as well as The second comparison is performed based on the signal strength and the second threshold. The determination of whether to attempt to access the resource during the second COT is based on the result of the first comparison, the result of the second comparison, or a combination thereof.

13. The method of claim 10, further comprising: Determine the energy detection ED value; as well as A third comparison is performed based on the ED value and the ED threshold. The determination of whether to attempt to access the resource during the second COT is further based on the result of the third comparison.

14. The method of claim 1, further comprising: A third message is received from a fourth device, wherein the fourth device is the third originator of the third COT, and wherein the third message includes sidelink control information, the sidelink control information including the third source ID of the fourth device and shared information associated with the third COT; as well as A fourth message is transmitted, which includes the source ID of the first UE, the source ID of the fourth device, and shared information associated with the third COT.

15. A first user equipment (UE), comprising: A transceiver is configured to receive a first message from a second UE that initiates a first channel occupancy time (COT), wherein the first message includes one or a combination of the second UE's source identity ID, shared information associated with the first COT, and location information associated with the second UE and an indication of a threshold. At least one processor; as well as A memory coupled to the at least one processor and storing processor-readable code, which, when executed by the at least one processor, is configured to initiate the transmission of a second message to a third UE including the source ID of the second UE, wherein: The second message further includes location information associated with the second UE, an indication of the threshold, or a combination thereof; and The thresholds include one or more distance thresholds, one or more signal strength thresholds, energy detection (ED) thresholds, or combinations thereof.

16. The first UE as claimed in claim 15, wherein the first message includes a first side link control SCI from the second UE, and the second message includes a second SCI, or a combination thereof.

17. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: detecting the source ID of the second UE and shared information associated with the first COT based on the first message.

18. The first UE as claimed in claim 15, wherein the location information includes coordinates associated with the second UE, a zone identifier associated with the second UE, or a combination thereof.

19. The first UE of claim 15, wherein the transceiver is further configured to receive a Radio Resource Configuration (RRC) message from a base station, the RRC message including an indication of a threshold.

20. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: Determine whether to transmit the second message; and The threshold is selected based on the determination that the first UE directly receives shared information associated with the first COT from the second UE.

21. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: The following steps determine whether to transmit the second message: Determine the ED value; and The comparison is performed based on the ED value and the threshold. The determination of whether to transmit the second message is based on the result of the comparison.

22. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: After the first COT expires, a third message is received from a third device, the third message including the source ID of a fourth device and second shared information associated with the second COT, wherein the fourth device includes the originator of the second COT; and Based on the source ID of the fourth device, it is determined whether to attempt to access resources during the second COT, and wherein, Before receiving the third message, the first UE missed receiving the second shared information associated with the second COT directly from the fourth device.

23. The first UE as claimed in claim 15, wherein the first UE is configured for vehicle-to-everything (V2X) communication.

24. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: Receive a third message from a third device, the third message including a second source ID of the second device that initiated the second COT; and The second source ID is used to determine whether to attempt to access resources during the second COT.

25. The first UE of claim 24, wherein the at least one processor and the memory are further configured to perform operations including: During the second COT, an attempt is made to access the resource; The third message includes sidelink control information associated with the second device and shared information associated with the COT. Before receiving the third message, the first UE missed receiving the sidelink control information directly from the second device.

26. The first UE of claim 24, wherein the at least one processor and the memory are further configured to perform operations including: Determine the distance between the first UE and the second device; as well as A first comparison is performed based on the distance and the first threshold; or The second source ID is used to measure one or more sidelink communications between the second device and the first UE; The signal strength associated with the second device and the first UE is determined based on the measurements of the one or more sidelink communications, wherein the signal strength is associated with a reference received power (RSRP), a received signal strength indicator (RSSI), or a path loss. as well as The second comparison is performed based on the signal strength and the second threshold. The determination of whether to attempt to access the resource during the second COT is based on the result of the first comparison, the result of the second comparison, or a combination thereof.

27. The first UE of claim 24, wherein the at least one processor and the memory are further configured to perform operations including: Determine the energy detection ED value; and A third comparison is performed based on the ED value and the ED threshold. The determination of whether to attempt to access the resource during the second COT is further based on the result of the third comparison.

28. The first UE of claim 15, wherein the at least one processor and the memory are further configured to perform operations including: A third message is received from a fourth device, wherein the fourth device is the third originator of the third COT, and wherein the third message includes sidelink control information, the sidelink control information including the third source ID of the fourth device and shared information associated with the third COT; and A fourth message is transmitted, which includes the source ID of the first UE, the source ID of the fourth device, and shared information associated with the third COT.

29. A device configured for wireless communication, the device comprising: A means for receiving a first message at a first user equipment (UE) from a second UE that initiates a first channel occupancy time (COT), wherein the first message includes one or a combination of the second UE's source identity ID, shared information associated with the first COT, location information associated with the second UE, and an indication of a threshold. as well as A means for transmitting a second message, including the source ID of the second UE, from the first UE to a third UE, wherein: The second message further includes location information associated with the second UE, an indication of the threshold, or a combination thereof; and The thresholds include one or more distance thresholds, one or more signal strength thresholds, energy detection (ED) thresholds, or combinations thereof.

30. A non-transient computer-readable medium storing instructions, which, when executed by a processor of a first user equipment (UE), cause the processor to perform operations including: A first message is received from a second UE that initiates a first channel occupancy time (COT), wherein the first message includes one or a combination of the second UE's source identity ID, shared information associated with the first COT, location information associated with the second UE, and an indication of a threshold; and Initiate the transmission of a second message to the third UE, including the source ID of the second UE, wherein: The second message further includes location information associated with the second UE, an indication of the threshold, or a combination thereof; and The thresholds include one or more distance thresholds, one or more signal strength thresholds, energy detection (ED) thresholds, or combinations thereof.

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