Techniques for side-link preemption indication in wireless communication systems

Abstract

Methods, systems, and apparatus for wireless communication are described. A first user equipment (UE) may receive control signaling from a base station indicating a set of resources for a sidelink channel available for sidelink communication with a second UE. The first UE may receive a sidelink pre-emption indication indicating that at least a first resource from the resource set has been pre-empted. The first UE may communicate a sidelink transmission with the second UE on the sidelink channel based on the sidelink pre-emption indication. In some cases, the first UE may determine whether the SPI (Side Link Provider Interface) satisfies one or more thresholds, and the first UE may communicate or suppress the sidelink transmission based on the determination that the SPI satisfies the one or more thresholds.

Description

[0001] Cross-references

[0002] This patent application claims the benefit of U.S. Patent Application No. 17 / 077,948, filed October 22, 2020, entitled “TECHNIQUES FORSIDELINK PREEMPTION INDICATIONS IN WIRELESS COMMUNICATIONS SYSTEMS”, which has been assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The following text generally refers to wireless communication, including techniques for sidelink preemption indication in wireless communication systems.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, message sending and receiving, broadcasting, and so on. These systems can support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, LTE-A Advanced (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems, which may be referred to as NR systems. These systems can employ various technologies, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Extended Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each of which simultaneously supports communication from multiple communication devices, which may also be referred to as User Equipment (UE).

[0006] In some deployments, UEs may communicate with one or more base stations using an access link (e.g., via the Uu interface in a 4G or 5G system). Additionally, some UEs may communicate directly with one or more other UEs using a side link (e.g., the PC5 interface), allowing for direct communication between UEs for certain communications instead of through base stations. In some cases, side link communication may interfere with communication via the access link, leading to relatively inefficient communication, poor reliability, or both.

[0007] Overview

[0008] The described techniques relate to improved methods, systems, devices, and apparatuses that support sidelink preemption indication for wireless communications systems. Generally, the described techniques enable one or more devices in a wireless communications system to implement sidelink preemption indication, which can result in enhanced efficiency, reliability, and network latency, among other advantages. For example, a base station can configure resources (e.g., a PC5 interface) for sidelink communications between user equipments (UEs) in a system as a supplement or replacement to resources of an access link (e.g., a Uu interface) for uplink or downlink communications. For example, the base station can transmit control signaling indicating a set of resources of a sidelink channel for sidelink communications between UEs. In some examples, the set of resources can be shared resources (e.g., sidelink communications and Uu communications can be on the same carrier).

[0009] The base station can transmit a sidelink preemption indication indicating that a subset of resources from the set of resources is preempted. For example, a UE can receive the sidelink preemption indication and communicate a sidelink transmission based on the sidelink preemption indication (e.g., the UE can refrain from using the subset of resources for sidelink communications). In some examples, the sidelink preemption indication can be transmitted periodically or aperiodically, the sidelink preemption indication can be transmitted via resources dedicated for preemption indication signaling, the sidelink preemption indication can correspond to a serving cell or one or more resource pools of one or more serving cells, or any combination thereof. The sidelink preemption indication can indicate one or more types of information, such as preempted resources, a priority, a power threshold, a zone identifier (ID), a periodicity, a resource pool ID, a carrier ID, a cast type, or any combination thereof. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 An example of a process flow is illustrated that supports techniques for sidelink preemption indication in a wireless communications system in accordance with aspects of the present disclosure.

[0012] Figure 2 An example of a process flow is illustrated that supports techniques for sidelink preemption indication in a wireless communications system in accordance with aspects of the present disclosure.

[0013] Figure 3 An example of a process flow is illustrated that supports techniques for sidelink preemption indication in a wireless communications system in accordance with aspects of the present disclosure.

[0014] Figure 4 And 5 A block diagram of a device that supports techniques for sidelink preemption indication in a wireless communications system in accordance with aspects of the present disclosure is shown.

[0015] Figure 6A block diagram of a communications manager that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0016] Figure 7 A diagram of a system including a device that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0017] Figure 8 And 9 A block diagram of a device that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0018] Figure 10 A block diagram of a communications manager that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0019] Figure 11 A diagram of a system including a device that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0020] Figures 12 to 14 A flow diagram illustrating a method that supports techniques for sidelink preemption indication in wireless communications systems is shown, in accordance with aspects of the present disclosure.

[0021] DETAILED DESCRIPTION

[0022] Some wireless communications systems can support both access links and sidelinks. An access link is a communication link between a user equipment (UE) and a base station. In some examples, an access link can be referred to as a Uu interface. In particular, a Uu interface can refer to an air interface used for downlink transmissions, uplink transmissions, or both. A sidelink is a communication link between like devices and can be referred to as a PC5 interface in some cases. For example, a sidelink can support communications between multiple UEs (e.g., in a vehicle-to-everything (V2X) system, a vehicle-to-vehicle (V2V) system, a device-to-device (D2D) system, etc.), between multiple base stations (e.g., in an integrated access and backhaul (IAB) deployment), or between other types of wireless communication devices. It should be noted that while various examples provided herein are discussed with respect to UE sidelink devices, such sidelink techniques can be used for any type of wireless device that uses sidelink communications. For example, a sidelink can support one or more of D2D communications, V2X or V2V communications, message relaying, discovery signaling, beacon signaling, or other signals communicated over the air from one wireless device to one or more other like wireless devices.

[0023] In some cases, a base station can configure a set of resources for use in sidelink communications between UEs. For example, a base station can configure resources (e.g., periodic resources) that can be used for physical sidelink shared channel (PSSCH), physical sidelink control channel (PSCCH), and physical sidelink feedback channel (PSFCH) communications, as well as other examples of sidelink communications. Additionally or alternatively, a base station can configure access link (e.g., Uu interface) resources for uplink or downlink communications with one or more UEs. In some examples, such resources can be shared resources (e.g., the configured sidelink resources can overlap with the configured access link resources). For example, the access link resources and the sidelink resources can be configured on a same carrier.

[0024] According to the various aspects discussed herein, a device of a wireless communication system can implement techniques for sidelink preemption indication (SPI). For example, a base station can configure resources for sidelink communications and access link communications with one or more UEs. The base station can determine to preempt a portion of the sidelink resources. For example, the base station can schedule a relatively high priority communication with a first UE using an access link (e.g., a communication via a Uu interface). The base station can preempt resources corresponding to the communication with the first UE. For example, the base station can transmit an SPI to one or more UEs in the system (e.g., the base station can convey the SPI directly to the UEs or the SPI can be relayed to the UEs) and the SPI can indicate the resources that are preempted, which can reduce the likelihood of interfering with the relatively high priority communication, among other advantages.

[0025] As an illustrative example, a UE can receive an SPI and convey a sidelink transmission based on the SPI. In some examples, the SPI can be transmitted periodically or aperiodically, the SPI can be conveyed via resources dedicated for preemption indication signaling, the SPI can correspond to a serving cell or one or more resource pools of one or more serving cells, or any combination thereof. The sidelink preemption indication can indicate one or more types of information. For example, the SPI can include a parameter indicating the resources that are preempted, a priority of the SPI, a power threshold (e.g., a reference signal receive power (RSRP)), a zone identifier (ID), a periodicity of the SPI, a time duration for which the SPI is valid, a resource pool ID, a carrier ID, a cast type, or any combination thereof.

[0026] A UE can communicate with a base station and / or other UEs based on parameters of an SPI. For example, the UE can determine whether a parameter of the SPI satisfies one or more thresholds. In some examples, the UE can refrain from communicating on a subset of sidelink resources based on whether the one or more thresholds are satisfied (e.g., a priority of the SPI can be greater than a priority of a sidelink communication of the UE, a zone ID can correspond to a zone of the UE, an RSRP of the SPI can be less than a threshold, and / or the like), which can result in reduced interference in the communication system, among other advantages. In some examples, the UE can determine to continue communicating on resources that overlap with the subset of resources based on whether the one or more thresholds are satisfied (e.g., an RSRP of the SPR can be greater than a threshold, a zone ID of the SPI can be different than a zone that includes the UE, and / or the like), which can result in increased communication efficiency in the system while ensuring reliable communications, among other advantages.

[0027] Aspects of the disclosure are initially described in the context of a wireless communication system. Aspects of the disclosure are further illustrated by and described with reference to process flows, block diagrams, system diagrams, and flowcharts that relate to techniques for sidelink preemption indication in a wireless communication system.

[0028] Figure 1 An example of a wireless communication system 100 that supports techniques for sidelink preemption indication in a wireless communication system is illustrated in accordance with aspects of the present disclosure. The wireless communication system 100 can include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 can be a Long Term Evolution (LTE) network, an LTE- Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some examples, the wireless communication system 100 can support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0029] The base stations 105 can be dispersed throughout the geographic area 100 and can be of different forms or have different capabilities. The base stations 105 and UEs 115 can wirelessly communicate via one or more communication links 125. Each base station 105 can provide communication coverage for a respective geographic area 110, which can be referred to as a

[0030] The UEs 115 can be dispersed throughout the coverage areas 110 of the wireless communication system 100, and each UE 115 can be stationary, or mobile, or both at different times. The UEs 115 can be devices in different forms or having different capabilities. Some example UEs 115 are illustrated in FIG. 1. A UE 115 described herein can be able to communicate with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), as shown in FIG. 1. Figure 1 Some example UEs 115 are illustrated in FIG. 1. A UE 115 described herein can be able to communicate as a function of cellular communication capabilities, a wireless Figure 1 network communication capabilities, and / or another type of communication capabilities. For example, some UEs 115 can be a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine-type communications (MTC) device, among other examples.

[0031] The base stations 105 can communicate with the core network 130, or with one another, or both. For example, the base stations 105 can interface with the core network 130 through one or more backhaul links 120 (e.g., via an SI, N2, N3, or other interface). The base stations 105 can communicate with one another over the backhaul links 120 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105), or indirectly (e.g., via core network 130), or both. In some examples, the backhaul links 120 can be or include one or more wireless links.

[0032] One or more of the base stations 105 described herein can include or can be referred to as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation NodeB or a giga-NodeB (either of which can be referred to as a gNB), a Home NodeB, a Home eNodeB, or other suitable terminology.

[0033] A UE 115 can include or can be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the “device” can also be referred to as a unit, a station, a terminal, or a client, among other examples. A UE 115 can also include or can be referred to as a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, a UE 115 can include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communications (MTC) device, among other examples, which can be implemented in various objects such as appliances or vehicles, meters or other equipment.

[0034] A UE 115 described herein can be able to communicate as a function of cellular communication capabilities, a wireless Figure 1 network communication capabilities, and / or another type of communication capabilities. Some UEs 115 can be a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine-type communications (MTC) device, among other examples.

[0035] UE 115 and base station 105 can wirelessly communicate with each other via one or more communication links 125 on one or more carriers. The term "carrier" can refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication link 125. For example, a carrier for communication link 125 may include a portion of the radio spectrum band (e.g., a bandwidth portion (BWP)) operating according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling coordinating carrier operation, user data, or other signaling. Wireless communication system 100 may support communication with UE 115 using carrier aggregation or multi-carrier operation. UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0036] In some examples (e.g., in a carrier aggregation configuration), the carrier may also have acquisition signaling or control signaling to coordinate the operation of other carriers. The carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. The carrier may operate in an autonomous mode in which initial acquisition and connection can be performed by UE 115 via that carrier, or in a non-autonomous mode in which the carrier may connect to carriers anchored using different carriers (e.g., different carriers of the same or different radio access technologies).

[0037] The communication link 125 shown in the wireless communication system 100 may include uplink transmission from UE 115 to base station 105, or downlink transmission from base station 105 to UE 115. The carrier may carry downlink or uplink communication (e.g., in FDD mode), or may be configured to carry both downlink and uplink communication (e.g., in TDD mode).

[0038] A carrier may be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth may be one of several defined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz) of a carrier for a particular radio access technology. Devices of the wireless communication system 100 (e.g., base station 105, UE 115, or both) may have a hardware configuration that supports communication over a specific carrier bandwidth, or may be configurable to support communication over a single carrier bandwidth within a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communication via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate over a portion (e.g., a subband, BWP) or all of the carrier bandwidth.

[0039] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as orthogonal frequency division multiplexing (OFDM) or discrete Fourier transform extended OFDM (DFT-S-OFDM)). In a system employing MCM, a resource element may include a symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements the UE 115 receives and the higher the order of the modulation scheme, the higher the data rate the UE 115 can achieve. Wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers or beams), and using multiple spatial layers can further improve the data rate or data integrity of communication with the UE 115.

[0040] One or more parameter designs for a carrier can be supported, where the parameter design may include a subcarrier spacing (Δf) and a cyclic prefix. A carrier can be divided into one or more BWPs with the same or different parameter designs. In some examples, UE 115 can be configured with multiple BWPs. In some examples, a single BWP for a carrier can be active at a given time, and communication for UE 115 can be limited to one or more active BWPs.

[0041] The time interval of base station 105 or UE 115 can be expressed as a multiple of a basic time unit, such as the sampling period T. s =1 / (Δf) max ·N f ) seconds, where Δf max This can represent the maximum supported subcarrier spacing, while Nf This can represent the maximum supported Discrete Fourier Transform (DFT) size. The time interval of the communication resources can be organized according to radio frames, each with a specified duration (e.g., 10 milliseconds (ms)). Each radio frame can be identified by a System Frame Number (SFN) (e.g., ranging from 0 to 1023).

[0042] Each frame may include multiple consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may (e.g., in the time domain) be divided into subframes, and each subframe may be further divided into several time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include several symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). In some wireless communication systems 100, time slots may be further divided into multiple mini-time slots containing one or more symbols. Excluding the cyclic prefix, each symbol period may contain one or more (e.g., N) symbols. f (Number) sampling periods. The duration of a symbol period can depend on the subcarrier interval or the operating frequency band.

[0043] A subframe, time slot, mini-slot, or symbol can be the smallest scheduling unit of the wireless communication system 100 (e.g., in the time domain) and can be referred to as a transmission time interval (TTI). In some examples, the duration of the TTI (e.g., the number of symbol periods in the TTI) can be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 can be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0044] Physical channels can be multiplexed on a carrier using various techniques. Physical control channels and physical data channels can be multiplexed on a downlink carrier, for example, using one or more of time-division multiplexing (TDM), frequency-division multiplexing (FDM), or hybrid TDM-FDM techniques. A control region (e.g., a control resource set (CORESET)) for physical control channels can be defined by the number of symbol periods and can extend across the system bandwidth or a subset of the system bandwidth of the carrier. One or more control regions (e.g., CORESET) can be configured for a group of UEs 115. For example, one or more UEs 115 can monitor or search control regions for control information based on one or more search space sets, and each search space set can include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for control channel candidates can refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information in a control information format having a given payload size. The search space set may include a common search space set configured to send control information to multiple UEs 115 and a UE-specific search space set configured to send control information to a specific UE 115.

[0045] Each base station 105 may provide communication coverage via one or more cells (e.g., macrocells, small cells, hotspots, or other types of cells, or any combination thereof). The term "cell" may refer to a logical communication entity used to communicate with base station 105 (e.g., on a carrier) and may be associated with an identifier used to distinguish adjacent cells (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID), or others). In some examples, a cell may also refer to a geographic coverage area 110 or a portion of geographic coverage area 110 (e.g., a sector) on which a logical communication entity operates. The extent of such cells may vary from smaller areas (e.g., structures, subsets of structures) to larger areas depending on various factors (such as the capabilities of base station 105). For example, a cell may be or include buildings, subsets of buildings, or external space between or overlapping geographic coverage areas 110, among other examples.

[0046] Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access for UEs 115 that have service subscriptions with a network provider supporting the macrocell. Small cells may be associated with a lower-power base station 105 (compared to macrocells) and may operate in the same or different (e.g., licensed or unlicensed) frequency bands as macrocells. Small cells may provide unrestricted access to UEs 115 that have service subscriptions with a network provider, or may provide restricted access to UEs 115 associated with the small cell (e.g., UEs 115 in a Closed Subscriber Group (CSG), or UEs 115 associated with a user in a home or office). Base station 105 may support one or more cells and may also support communication on one or more cells using one or more component carriers.

[0047] In some examples, a carrier can support multiple cells and can be configured with different cells based on different protocol types that can provide access for different types of devices (e.g., MTC, Narrowband IoT (NB-IoT), Enhanced Mobile Broadband (eMBB)).

[0048] In some examples, base station 105 may be mobile, and thus provide communication coverage to mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. Wireless communication system 100 may include, for example, a heterogeneous network, in which different types of base stations 105 use the same or different radio access technologies to provide coverage to various geographic coverage areas 110.

[0049] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices and can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC may include communication from devices that have integrated sensors or meters to measure or capture information and relay such information to a central server or application that uses the information or presents it to people interacting with the application. Some UE 115 devices may be designed to collect information or automate the behavior of machines or other devices. Examples of applications for MTC devices include: smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wilderness survival monitoring, weather and geographic event monitoring, queue management and tracking, remote security sensing, physical access control, and transaction-based commercial toll collection.

[0050] Wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication, or various combinations thereof. For example, wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency, or mission-critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private or group communication and may be supported by one or more mission-critical services, such as Mission-Critical Talk-to-Talk (MCPTT), Mission-Critical Video (MCVideo), or Mission-Critical Data (MCData)). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general business applications. The terms ultra-reliable, low latency, mission-critical, and ultra-reliable low latency are used interchangeably herein.

[0051] In some examples, UE 115 may also be able to communicate directly with other UE 115 on a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UE 115s utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105 or may be unable to receive transmissions from base station 105 for other reasons. In some examples, groups of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, where each UE 115 transmits to every other UE 115 in the group. In some examples, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between the individual UE 115s without involving base station 105.

[0052] In some systems, the D2D communication link 135 may be an example of a communication channel (such as a sidelink communication channel) between vehicles (e.g., UE 115). In some examples, vehicles may communicate using vehicle-to-vehicle (V2X) communication, vehicle-to-vehicle (V2V) communication, or some combination of these communications. Vehicles may signal information related to traffic conditions, signaling, weather, safety, emergencies, or any other information relevant to the V2X system. In some examples, vehicles in a V2X system may communicate via vehicle-to-network (V2N) communication through one or more network nodes (e.g., base station 105) with roadside infrastructure (such as roadside units), or with the network, or with both.

[0053] Core network 130 provides user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. Core network 130 can be an evolved packet core (EPC) or a 5G core (5GC). The EPC or 5GC may include at least one control plane entity (e.g., a Mobility Management Entity (MME), Access and Mobility Management Function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a Serving Gateway (S-GW), Packet Data Network (PDN) Gateway (P-GW), or User Plane Function (UPF)) for routing packets or interconnecting to external networks. The control plane entity manages non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by base station 105 associated with core network 130. User IP packets can be delivered through the user plane entity, which provides IP address allocation and other functions. The user plane entity can connect to network operator IP service 150. Network operator IP services 150 may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0054] Some network devices (such as base station 105) may include sub-components, such as access network entity 140, which may be an example of an access node controller (ANC). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as a radio headend, smart radio headend, or transmit / receive point (TRP). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio headends and ANCs) or combined into a single network device (e.g., base station 105).

[0055] Wireless communication system 100 can operate using one or more frequency bands, typically in the range of 300 MHz to 300 GHz. Generally, the 300 MHz to 3 GHz band is referred to as a UHF band or decimeter band because the wavelengths range from approximately 1 decimeter to 1 meter. UHF waves can be blocked or redirected by buildings and environmental features, but these waves can penetrate various structures sufficiently for macrocells to provide service to UE 115 located indoors. Compared to transmissions using smaller frequencies and longer waves in the lower HF or VHF portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter ranges (e.g., less than 100 km).

[0056] Wireless communication system 100 may utilize both licensed and unlicensed radio spectrum bands. For example, wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (such as the 5 GHz Industrial, Scientific, and Medical (ISM) band). When operating in unlicensed radio spectrum bands, devices (such as base station 105 and UE 115) may employ carrier sensing for collision detection and avoidance. In some examples, operation in unlicensed frequency bands may be based on carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in licensed frequency bands. Operation in unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, etc.

[0057] Base station 105 or UE 115 may be equipped with multiple antennas that can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. The antennas of base station 105 or UE 115 may be located within one or more antenna arrays or antenna panels that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have an antenna array with several rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0058] Beamforming (also known as spatial filtering, directional transmission, or directional reception) is a signal processing technique that can be used at a transmitting or receiving device (e.g., base station 105, UE 115) to shape or guide an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array, such that some signals propagating relative to a particular orientation of the antenna array experience constructive interference, while others experience destructive interference. Adjustments to the signals transmitted via the antenna elements may include the transmitting or receiving device applying amplitude offset, phase offset, or both to the signals carried via the antenna elements associated with that device. The adjustments associated with each antenna element may be defined by a beamforming weight set associated with a particular orientation (e.g., the antenna array relative to the transmitting or receiving device, or relative to some other orientation).

[0059] In some scenarios, multiple UEs 115 may implement sidelink communication for direct UE-to-UE information exchange. According to various described techniques, such UEs 115 may monitor the SPI from base station 105 and determine, based on the SPI, whether one or more sidelink communications are preempted (e.g., whether the reserved resources of the sidelink channel are indicated by the SPI as preempted).

[0060] For example, base station 105 may configure resources (e.g., PC5 interface) for sidelink communication between UEs 115 in the system, as a supplement or replacement for access link resources (e.g., Uu interface) used for uplink or downlink communication. For example, base station 105 may transmit control signaling indicating a resource set for sidelink channels used for sidelink communication between UEs. In some examples, this resource set may be shared resources (e.g., sidelink communication and Uu communication may be on the same carrier). Base station 105 may transmit a sidelink preemption indication indicating that a subset of resources from this resource set is preempted. For example, UE 115 may receive the sidelink preemption indication and convey sidelink transmissions based on it (e.g., UE 115 may suppress the use of this resource subset for sidelink communication or UE 115 may communicate on this resource subset based on one or more parameters of the SPI satisfying one or more thresholds). In some examples, a sidelink preemption indication may be sent periodically or aperiodically; it may be transmitted via resources dedicated to preemption indication signaling; it may correspond to a serving cell or one or more resource pools of one or more serving cells, or any combination thereof. The sidelink preemption indication may indicate one or more types of information, such as the preempted resource, priority, power threshold, zone identifier (ID), periodicity, resource pool ID, carrier ID, broadcast type, or any combination thereof.

[0061] Figure 2 Examples of a wireless communication system 200 supporting techniques for sidelink preemption indication in a wireless communication system, according to various aspects of this disclosure, are described. In some examples, the wireless communication system 200 may implement various aspects of the wireless communication system 100. For example, the wireless communication system 200 may include a base station 115-a, UE 115-a, UE 115-b, UE 115-c, UE 115-d, and UE 115-e, which may respectively refer to... Figure 1 Examples of base station 105 and UE 115 described herein. In some cases, base station 105-a may communicate with one or more UEs 115 via access link 205 using access link communication 215. In some cases, UEs 115 may communicate with each other via side link 210 using side link communication 220 (e.g., in V2X systems, D2D systems, etc.). Generally, wireless communication system 200 may illustrate example implementations of one or more side link preemption indications 225 as described herein.

[0062] One or more UEs 115 can be in the coverage area 110-a of base station 105-a (e.g., refer to Figure 1 Within coverage area 110. Alternatively or concurrently, one or more UEs 115 may be outside coverage area 110-a. As an illustrative example, UEs 115-a and UEs 115-c may communicate with base station 105-a via respective access links (e.g., via access links 205-a and 205-b, respectively). UEs 115-a and UEs 115-b may communicate via side link 210-a, and UEs 115-d and UEs 115-e may communicate via side link 210-b. Note that, provided... Figure 2 The examples provided are for discussion and illustration, and numerous other deployments are possible, such as situations where communication between base station 105-a and one or more UEs 115 is relayed via another UE 115 (e.g., using sidelink 210 relay when UE 115 is outside coverage area 110-a) or via another wireless relay node; situations where additional UEs 115 are present; situations where other types of UEs 115 or relays are present (e.g., roadside units in a V2X system); situations where UEs 115 are deployed in factory automation or other industrial environments; situations where communication and indications from some devices are implemented in other devices (e.g., sidelink preemption indications can be generated and / or transmitted from a relay node or UE 115 instead of base station 105-a); or any combination thereof, to name just a few. The techniques discussed herein can be used in any such deployment.

[0063] Sidelink communication 220 can be configured to operate using one or more modes, such as a first mode with dynamic scheduling (e.g., mode 1 using downlink control information (DCI) format 3_0), which has configured resources for transmission (e.g., supporting both type 1 and type 2); a second mode with sensing and reservation of resources without control by base station 105-a (e.g., mode 2) (e.g., UE 115 can coordinate resource reservations among themselves without base station 105-a); or any combination thereof. The techniques described herein may relate to the first mode, the second mode, or both, as well as other examples of communication modes. As an example, the techniques described herein may enable base station 105-a (e.g., gNB) to control sidelink activities of in-coverage UEs operating with mode 2 resource allocation, etc.

[0064] In some examples, devices in wireless communication system 200 may multiplex Uu and sidelink transmissions. In some examples, base station 105-a may not include resource sharing between access link communication 215 and sidelink communication 220 (e.g., a semi-static partitioning of resources between access link 205 and sidelink 210). In some other examples, base station 105-a may implement resource sharing (e.g., soft resource sharing). Wireless communication system 200 may support techniques for enhancing Uu and SL operation, such as multiplexing on licensed carriers for non-V2X or commercial use cases, and other examples of use cases (e.g., any use case where wireless communication allows resource sharing between Uu and SL).

[0065] Sidelink communication 220 may occur on resources shared with access link communication 215 (e.g., sidelink communication 220 may utilize uplink symbols, such as a full uplink time slot or a full uplink portion of a flexible time slot, etc.). In other words, access link communication 215 (e.g., uplink or downlink communication) may use a set of resources shared with sidelink communication 220. For example, resources for sidelink 210 and access link 215 may overlap (e.g., base station 105-a may allocate carrier resources for sidelinks and support Uu communication on those carrier resources via resource pooling configuration). As an illustrative example, uplink symbols may potentially be used for sidelink communication 220 (e.g., UE 115 may be configured with a sidelink resource pool that overlaps with at least a portion of the uplink resources). Additionally or alternatively, downlink symbols may potentially be used for sidelink communication 220 (e.g., UE 115 may be configured with a sidelink resource pool that overlaps with at least a portion of the downlink resources). In some cases, power control techniques can be used for this resource sharing (e.g., power control configurations can be semi-statically adjusted to account for downlink or sidelink path losses for open-loop power control (OLPC)). For example, UE 115 can receive dynamic indications of whether sidelink or downlink path losses should be used to determine transmit power and other examples of parameters (e.g., if there are no overlapping Uu transmissions for sidelink transmissions, UE 115 can be instructed to increase power; the indicated parameters for power transmissions can, for example, be tied to the priority of sidelink transmissions; base station 105-a can transmit OLPC indications or zone-based OLPC parameter indications for mode 2 sidelink UEs, etc.).

[0066] According to the techniques described herein, the wireless communication system 200 may enable SPI 225, which can result in reduced interference between communications on shared resources. For example, base station 105-a may be able to control sidelink activity via, for example, SPI 225 to preempt resources for uplink or downlink transmissions from UE 115-c, which can reduce the chance of sidelink communication 220 interfering with Uu's uplink or downlink communication (e.g., access link communication 215).

[0067] As an illustrative example, base station 105-a can configure one or more UEs 115 for sidelink communication 220. For example, base station 105-a can transmit configuration information (e.g., control signaling on access link 205) indicating radio resources (e.g., PSSCH resources) allocated for sidelink communication 220 between UEs 115-a, UE 115-b, UE 115-d, and UE 115-e. In some cases, the configuration information can configure UEs 115 to operate with either Mode 1 resource allocation or Mode 2 resource allocation. In Mode 1 resource allocation, the network allocates resources for each UE 115 (e.g., using dynamic scheduling with DCI format 3_0 or using a configured resource pool). In Mode 2 resource allocation, UEs 115 use sensing and retention techniques to select sidelink resources from the sidelink resource pool to identify resources without direct control of base station 105-a. For example, a wireless device (e.g., UE115, base station 105, or other wireless device) may execute sensing or prioritization procedures (e.g., using sidelink resource allocation mode 2 or a variant), and the wireless device may select sidelink resources based on these sensing and prioritization procedures. In some such examples, if a resource is preempted (e.g., UE115 receives a sidelink preemption indication indicating a preempted resource), UE115 may trigger a resource reselection procedure if UE115 has communication scheduled via the preempted resource. Additionally or alternatively, UE115 may perform an availability check before starting the initial transmission of a transport block. For example, UE115 may determine whether the resource for the initial transmission is available based on any sidelink preemption indication message, and so on.

[0068] In some cases, sidelink resources may be allocated from resources originally intended for uplink communication on access links 205-a and 205-b (e.g., uplink symbols of the Uu interface). In other cases, sidelink resources may be allocated from flexible resources, downlink resources, or both of access links 205-a and 205-b (e.g., flexible or downlink symbols of the Uu interface). In some cases, on a given carrier, base station 105-a may allocate some resources for sidelinks via resource pooling configuration and also support some Uu users on the carrier.

[0069] In some examples, base station 105-a may determine that high-priority access link communication 215 (e.g., URLLC or mission-critical data) with UE 115-c is scheduled to have resources that may overlap with configured sidelink resources. That is, the resources allocated for access link communication 215 with UE 115-c may potentially conflict with one or more sidelink communications 220 transmitted via the allocated resources. To reduce or avoid interference between traffic on sidelink 210 and access link 205-b, base station 105-a may transmit SPI 225 to one or more UEs 115. In some examples, SPI 225 may be transmitted in DCI on PDCCH and may be transmitted alternatively or additionally in broadcast transmissions from base station 105-a (e.g., on the Physical Broadcast Channel (PBCH)).

[0070] For example, UE 115-a, UE 115-b, UE 115-d, UE 115-e, or combinations thereof, may receive SPI 225. One or more UE 115s may preempt one or more sidelink transmissions based on one or more parameters of SPI 225, which may, for example, reduce interference with scheduled relatively high-priority access link communication 215 between base station 105-a and UE 115-c. This preemption technique provides base station 105-a with flexibility in scheduling sidelink resources and allocating access link resources for certain communications, such as high-priority communications. By providing sufficient sidelink resources, the first UE 115-a, the second UE 115-b, and any other sidelink UE 115 can exchange data efficiently with relatively high reliability and low latency, relative to situations where base station 105-a may be constrained in terms of the amount of sidelink resources that can be granted. Furthermore, for high-priority access link communication 215, the reliability and latency can be increased and the latency reduced by the ability of base station 105-a to schedule such communication using resources that may conflict with the allocated side link resources (e.g., SPI 225 can enable base station 105-a to reclaim potential resources for access link communication 215, such as time slots or sub-channels that can be used for side link communication 220).

[0071] In some examples, such as if the target UE 115 (e.g., a sidelink transmission user) is within coverage, the SPI 225 may be generated and transmitted by base station 105-a. In some examples, the SPI 225 may be relayed to these target UEs 115 and / or may be generated by a relay node. The SPI 225 may be transmitted periodically (e.g., via periodic resources, such as scheduled resources with configured periodicity) or non-periodically (e.g., via dynamically allocated resources). In some examples, resource sets may be configured for preemption indication signaling (e.g., known subchannels of a resource pool may be configured for preemption indication signaling, a dedicated resource pool configurable for preemption indication signaling, one or more carriers may be configured to monitor sidelink preemption indicators, or any combination thereof). For example, UE 115-d may monitor the configured resource set to find the SPI 225 and receive the SPI 225 based on that monitoring. The SPI 225 may correspond to a corresponding resource pool or may be applied to a set of resource pools on a corresponding serving cell. For example, base station 105-a may dynamically indicate one or more resource pools for SPI 225, and UE 115 may apply SPI 225 to the indicated one or more resource pools and / or one or more sidelink carriers (e.g., to enable communication or suppress communication via the indicated pre-occupied resources through SPI 225). Additionally or alternatively, UE 115 may be pre-configured to apply SPI 225 to one or more resource pools. In some examples, SPI 225 may correspond to a corresponding serving cell or may be applied to a group of one or more serving cells (e.g., one or more serving cells associated with SPI 225 may be dynamically indicated or pre-configured).

[0072] SPI 225 may indicate one or more types of information (e.g., SPI 225 may include parameters indicating such one or more types of information). For example, SPI 225 may indicate time-frequency resources available for pre-allocation. That is, UE 115 (e.g., UE 115-a) may receive SPI 225 and, for example, pre-allocate the indicated time-frequency resources based on determining whether one or more thresholds are met (e.g., suppressing transport-side link communication 220 if communication will use that time-frequency resource), as described herein. In some examples, SPI 225 may include a sequence of bits, where each bit is mapped to a set of time slots and / or sub-channels available for pre-allocation (e.g., the mapped set of time slots and / or sub-channels may be scheduled for relatively high-priority access link communication 215 with UE 115-c).

[0073] In some examples, SPI 225 may be associated with a priority. For example, the number of bits in SPI 225 may indicate the priority of SPI 225 (e.g., a dynamic indication of priority). As an illustrative example, UE 115-a may identify a priority threshold for SPI 225 (e.g., the indicated priority of SPI 225). If UE 115-a determines that a sidelink transmission to UE 115-b overlaps with the indicated resource and that the priority of that sidelink transmission is lower than the priority threshold of SPI 225, then UE 115-a may preempt the resource. Additionally or alternatively, the priority threshold may be configured for the corresponding carrier or resource pool (e.g., pre-configured via control signaling). In some examples, the priority threshold may be configured via a shared configuration. For example, a base station or another radio device may indicate a shared configuration for a resource pool or carrier (e.g., UE 115 active on that resource pool or carrier will follow that shared configuration). Additionally or alternatively, the base station or another radio device may indicate a UE-specific configuration (e.g., the configuration may be UE-specific and per resource pool or carrier). In some examples, SPI 225 may include a bit in the payload indicating whether a sidelink transmission with a priority that meets a configured priority threshold should be preempted (e.g., UE115-a may receive this bit and preempt a sidelink transmission with a priority lower than the preconfigured priority threshold). Such dynamic priority implementation enables more flexible scheduling and priority control at base station 105-a, among other advantages.

[0074] In some examples, one or more UEs 115 are configured to be in one or more priority modes. For example, UE 115-a may be configured to apply SPI 225 regardless of the priority of sidelink transmissions using preempted resources (e.g., UE 115-a may suppress sidelink transmissions of any priority conveyed via the resources indicated by SPI 225). As another example, UE 115-a may be configured to apply SPI 225 if the packet priority of a sidelink transmission (e.g., to UE 115-b) meets a priority threshold. For example, the priority threshold may be configured on a per-UE basis (e.g., UE 115-a and UE 115-d may be configured with different priority thresholds), per resource pool basis, per serving cell basis, or any combination thereof. These modes can result in reduced dynamic signaling overhead, among other benefits.

[0075] UE 115 can determine whether one or more thresholds are met based on the received SPI 225. Such UE 115 can determine whether to apply (e.g., follow) or ignore the received SPI 225 based on whether the thresholds are met (e.g., whether the priority of the sidelink transmission meets a priority threshold for SPI 225). As an illustrative example, UE 115-d and UE 115-a can determine the corresponding measurement on the signal carrying SPI 225, such as an RSRP measurement. UE 115-d can compare the RSRP measurement with an RSRP threshold and determine whether to preempt the resource indicated by SPI 225 based on whether the RSRP threshold is met. For example, UE 115-d can determine that the measured RSRP is greater than the threshold, and UE 115-d can preempt the indicated resource. As another example, UE 115-a can determine that the corresponding measured RSRP is less than the RSRP threshold, and can transmit sidelink communication 220 based on this determination. Alternatively, to reduce interference to neighboring cells, UE 115-a may consider applying SPI 225 (e.g., preempting indicated resources) when the measured RSRP on access link 205-a is less than the RSRP threshold. This technique allows UE 115, which is relatively close to the cell center, to apply SPI 225 to reduce interference, while UE 115, which is relatively far away or less likely to interfere with access link communication 215, can maintain sidelink communication 220 (e.g., suppressing the application of SPI 225). This can increase system efficiency and reduce latency, among other advantages.

[0076] In some examples, the RSRP threshold may be indicated by the number of bits in the payload of SPI 225, or it may be configured on a per-UE, per-resource-pool, or per-serving-cell basis (e.g., pre-configured). Additionally or alternatively, the RSRP threshold may be determined based on a corresponding pairing of transport packet priorities, or sidelink packets and priorities indicated by SPI 225.

[0077] SPI 225 may indicate a zone ID. For example, SPI 225 may include parameters indicating one or more zone IDs to which SPI 225 is to be applied. UE 115 may determine that the zone ID in which UE 115 is located meets a threshold (e.g., matches the zone ID indicated in SPI 225) and UE 115 can apply SPI 225. Such techniques enable base station 105-a to select a zone for preempting resources based on the location of the corresponding access link communication 215 (e.g., if base station 105-a knows the location of a Uu user (such as UE 115-c), the base station may preempt resources in the same or adjacent zones).

[0078] Base station 105-a can indicate the periodicity of SPI 225. For example, the indicated resource may be used for access link communication in a periodic manner (e.g., the resource may repeat periodically), and each periodic instance of the indicated resource may need to be preempted by a sidelink UE. Therefore, base station 105-a can explicitly indicate the periodicity of SPI 225 (e.g., SPI 225 may indicate the number of periods for which the resource needs to be preempted) or indicate it by other methods. For example, UE 115-a can start a timer upon receiving SPI 225. UE 115-a can apply SPI 225 to the indicated resource (i.e., SPI 225 may be valid) until the timer expires or until a new SPI 225 is received. UE 115-a can reset the timer upon receiving a new SPI 225. Upon the timer expires, UE 115-a can determine that the resource indicated by SPI 225 is available for sidelink communication 220.

[0079] SPI 225 can indicate a resource pool ID, a carrier ID, or any combination thereof. For example, base station 105-a can configure multiple resource pools on the serving cell. Base station 105-a can attempt to reclaim a subset of resource pools for access link communication 215, and base station 105-a can indicate that subset of resource pools (e.g., one or more resource pool IDs) in SPI 225.

[0080] SPI 225 can indicate the broadcast type. For example, SPI 225 can indicate whether preemption is associated with unicast, multicast, broadcast, or a combination thereof. In some examples, this indication can be dynamic. For example, one or more bits in SPI 225 or another message can indicate the broadcast type. Additionally or alternatively, broadcast types can be pre-configured for one or more UEs 115. For example, the broadcast type associated with SPI 225 can be configured on a per-UE basis (e.g., via control signaling or pre-configured at UE 115), per-resource-pool basis, per-carrier basis, or a combination thereof.

[0081] Figure 3 Examples of process flow 300 supporting techniques for sidelink preemption indication in a wireless communication system according to various aspects of this disclosure are described. In some examples, process flow 300 may implement various aspects of wireless communication system 100 or 200. For example, process flow 300 may be implemented by a first UE 115-f, a second UE 115-g, and a serving base station 105-b, which may be examples of UE 115 and base station 105 as described herein. Alternative examples are possible, in which some steps are performed in a different order than described or not at all. In some cases, the steps may include additional features not mentioned below, or further steps may be added.

[0082] At 305, the first UE 115-f, the second UE 115-g, the base station 105-b, or any combination thereof, can establish and configure a communication connection. In some examples, the base station 105-b can configure the first UE 115-f and the second UE 115-g to have a sidelink communication connection. For example, the base station 105-b can transmit control signaling indicating a resource set for a sidelink channel used for sidelink communication, as shown in reference... Figure 2 As described.

[0083] At 310, base station 105-b may transmit the SPI to a first UE 115-f, a second UE 115-g, or both. For example, base station 105-b may identify a first resource in a resource set that is preempted (e.g., relatively high-priority communication between another UE 115 and base station 105-b may be scheduled for the first resource and base station 105-b may preempt that resource). Base station 105-b may transmit the SPI to one or both of UE 115, as referred to herein. Figure 2 As described. Additionally or alternatively, another wireless device may generate or transmit an SPI. For example, a second UE 115-g or another UE 115 may transmit an SPI (e.g., relay), a second UE 115-g or another UE 115 may generate an SPI, or a combination thereof, and other examples of wireless devices.

[0084] In some examples, at 315, the first UE 115-f may determine whether one or more thresholds are met based on the received SPI. For example, the first UE 115-f may determine whether one or more parameters associated with the SPI meet the one or more thresholds, and the first UE 115-f may apply or suppress the application of the SPI based on this determination, as referred to herein. Figure 2 As described. Additionally or alternatively, in 320, the second UE 115-g may determine whether one or more thresholds are met based on the received SPI.

[0085] In some examples, at 325, the first UE 115-f and the second UE 115-g may transmit or receive sidelink communication based on receiving the SPI and / or determining whether one or more thresholds are met. For example, the first UE 115-f may use a resource different from the first resource indicated by the SPI to communicate with the second UE 115-g, or the first UE 115-f may use the first resource to communicate with the second UE 115-g (e.g., based on failure to meet one or more thresholds), as referred to herein. Figure 2 As described.

[0086] Figure 4A block diagram 400 of a device 405 supporting techniques for sidelink preemption indication in a wireless communication system is shown according to various aspects of this disclosure. Device 405 may be an example of various aspects of UE 115 as described herein. Device 405 may include a receiver 410, a communication manager 415, and a transmitter 420. Device 405 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0087] Receiver 410 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques used for sidelink preemption indication in wireless communication systems). This information can be transmitted to other components of device 405. Receiver 410 can be a reference... Figure 7 Examples of various aspects of the transceiver 720 described. The receiver 410 may utilize a single antenna or a set of antennas.

[0088] Communication manager 415 may receive from a base station control signaling an indication of a resource set of a sidelink channel available for sidelink communication with a second UE; receive a sidelink preemption indication indicating that at least a first resource from the resource set has been preempted; and perform a communication sidelink transmission with the second UE on the sidelink channel based on the sidelink preemption indication. Communication manager 415 may be an example of various aspects of communication manager 710 described herein.

[0089] The communication manager 415 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 415 or its sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described in this disclosure.

[0090] The communication manager 415 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 415 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 415 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0091] The communication manager 415 described herein can be implemented to achieve one or more potential advantages. One implementation allows device 405 to determine priority for one or more sidelink communications. Such operation can provide improvements in communication reliability and efficiency for systems supporting both access links and sidelinks, as well as other examples of such systems. Such improvements can enhance wireless communication efficiency at the UE by allowing flexible allocation of sidelink resources with configurable priority in cases where other communications may conflict with sidelink resources. Thus, the supported techniques can include improved network and UE operation, and in some examples, improved network efficiency, reduced latency, and provision of network scheduling flexibility, among other benefits.

[0092] Transmitter 420 can transmit signals generated by other components of device 405. In some examples, transmitter 420 may be co-located with receiver 410 in a transceiver module. For example, transmitter 420 may be a reference... Figure 7 Examples of various aspects of the transceiver 720 described. The transmitter 420 may utilize a single antenna or a set of antennas.

[0093] Figure 5 A block diagram 500 of a device 505 supporting techniques for sidelink preemption indication in a wireless communication system is shown according to aspects of this disclosure. Device 505 may be an example of aspects of device 405 or UE 115 as described herein. Device 505 may include a receiver 510, a communication manager 515, and a transmitter 535. Device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0094] Receiver 510 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques used for sidelink preemption indication in wireless communication systems). The information can be transmitted to other components of device 505. Receiver 510 can be a reference... Figure 7 Examples of various aspects of the transceiver 720 described. The receiver 510 may utilize a single antenna or a set of antennas.

[0095] Communication manager 515 may be an example of aspects of communication manager 415 as described herein. Communication manager 515 may include control signal receiver 520, SPI component 525, and sidelink transmission component 530. Communication manager 515 may be an example of aspects of communication manager 710 as described herein.

[0096] The control signal receiver 520 can receive control signaling from the base station indicating a set of resources for a sidelink channel that can be used for sidelink communication with the second UE.

[0097] The SPI component 525 can receive a sidelink preemption indication indicating that at least a first resource from the resource set has been preempted.

[0098] The sidelink transmission component 520 can communicate sidelink transmission with the second UE on the sidelink channel based on the sidelink preemption indication.

[0099] Transmitter 535 can transmit signals generated by other components of device 505. In some examples, transmitter 535 may be co-located with receiver 510 in a transceiver module. For example, transmitter 535 may be a reference... Figure 7 Examples of various aspects of the transceiver 720 described. The transmitter 535 may utilize a single antenna or an antenna set.

[0100] Figure 6 A block diagram 600 of a communication manager 605 supporting techniques for sidelink preemption indication in a wireless communication system, according to various aspects of this disclosure, is shown. The communication manager 605 may be an example of aspects of the communication manager 415, communication manager 515, or communication manager 710 described herein. The communication manager 605 may include a control signal receiver 610, an SPI component 615, a sidelink transmission component 620, a priority component 625, an RSRP component 630, a monitoring component 635, and an indication component 640. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0101] The control signal receiver 610 can receive control signaling from the base station indicating a set of resources for a sidelink channel that can be used for sidelink communication with the second UE.

[0102] SPI component 615 may receive a sidelink preemption indication indicating that at least a first resource from the resource set has been preempted. In some examples, SPI component 615 may receive a sidelink preemption indication indicating a priority threshold.

[0103] In some examples, the SPI component 615 may receive a sidelink priority indication indicating a zone identifier, resource pool identifier, carrier identifier, priority periodicity, broadcast type, or any combination thereof. In some examples, the SPI component 615 may periodically receive a sidelink priority indication, aperiodically receive a sidelink priority indication, or a combination thereof.

[0104] In some examples, the SPI component 615 may receive a sidelink priority indication corresponding to a first resource pool or set of resource pools, the first resource pool or set of resource pools including the resource set. In some examples, the SPI component 615 may receive a sidelink priority indication corresponding to a first serving cell, a set of serving cells including the first serving cell, or a combination thereof.

[0105] The sidelink transmission component 620 can communicate sidelink transmissions to a second UE on the sidelink channel based on a sidelink preemption indication.

[0106] Priority component 625 can identify a priority threshold associated with a sidelink preemption indication. In some examples, priority component 625 can determine that the priority of a sidelink transmission satisfies the priority threshold, wherein the sidelink transmission is communicated on the sidelink channel based on the sidelink transmission's priority satisfying the priority threshold. In some cases, the priority threshold is configured at the UE for a carrier, a resource pool including a resource set, or a combination thereof. In some cases, the priority threshold is configured by a shared configuration for a carrier or a resource pool including a resource set, which is associated with multiple UEs active on that carrier or that resource pool.

[0107] RSRP component 630 can identify a reference signal received power measurement based on a received sidelink preemption indication. In some examples, RSRP component 630 can determine that the reference signal received power measurement meets a threshold, wherein sidelink transmissions are communicated on the sidelink channel based on the reference signal received power measurement meeting the threshold. In some examples, RSRP component 630 can identify the threshold based on the priority of the sidelink transmission, which is indicated by the sidelink preemption indication.

[0108] The monitoring component 635 can monitor a second resource set to look for sidelink preemption indications, wherein the receiving sidelink preemption indication is based on the monitoring, and the second resource set includes resources different from the resource set, a subset of the resource set, or a combination thereof.

[0109] The indication component 640 can receive an indication regarding a sidelink preemption indication corresponding to a first serving cell or set of serving cells.

[0110] Figure 7A diagram of a system 700 including a device 705 supporting techniques for sidelink preemption indication in a wireless communication system is shown according to various aspects of this disclosure. Device 705 may be an example of device 405, device 505, or UE 115 as described herein, or a component including the aforementioned devices. Device 705 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 710, an I / O controller 715, a transceiver 720, an antenna 725, a memory 730, and a processor 740. These components may be in electronic communication via one or more buses (e.g., bus 745).

[0111] The communication manager 710 can receive control signaling from the base station indicating a resource set of a sidelink channel that can be used for sidelink communication with the second UE; receive a sidelink preemption indication indicating that at least a first resource from the resource set is preempted; and communicate sidelink transmissions to the second UE on the sidelink channel based on the sidelink preemption indication.

[0112] The I / O controller 715 manages the input and output signals of device 705. The I / O controller 715 can also manage peripheral devices not integrated into device 705. In some cases, the I / O controller 715 may represent a physical connection or port to an external peripheral device. In some cases, the I / O controller 715 may utilize an operating system, such as... Or another known operating system. In other cases, the I / O controller 715 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 715 may be implemented as part of a processor. In some cases, a user may interact with the device 705 via the I / O controller 715 or via hardware components controlled by the I / O controller 715.

[0113] Transceiver 720 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 720 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 720 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0114] In some cases, a wireless device may include a single antenna 725. However, in other cases, the device may have more than one antenna 725, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0115] Memory 730 may include random access memory (RAM) and read-only memory (ROM). Memory 730 may store computer-readable, computer-executable code 735, including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 730 may particularly include a basic input / output system (BIOS) that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0116] Processor 740 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 740 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 740. Processor 740 may be configured to execute computer-readable instructions stored in memory (e.g., memory 730) to cause device 705 to perform various functions (e.g., functions or tasks supporting techniques for sidelink preemption indication in wireless communication systems).

[0117] Code 735 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 735 may be stored in a non-transitory computer-readable medium, such as system memory or other types of memory. In some cases, code 735 may not be directly executed by processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0118] Figure 8 A block diagram 800 of an apparatus 805 supporting techniques for sidelink preemption indication in a wireless communication system is shown according to various aspects of this disclosure. Apparatus 805 may be an example of various aspects of base station 105 as described herein. Apparatus 805 may include a receiver 810, a communication manager 815, and a transmitter 820. Apparatus 805 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0119] Receiver 810 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques used for sidelink preemption indication in wireless communication systems). This information can be transmitted to other components of device 805. Receiver 810 can be a reference... Figure 11 Examples of various aspects of the transceiver 1120 described herein. The receiver 810 may utilize a single antenna or a set of antennas.

[0120] Communication manager 815 may transmit control signaling to a first UE indicating a set of resources for a sidelink channel that can be used for sidelink communication with a second UE; determine to pre-allocate a first resource from that resource set; and transmit a sidelink pre-allocation indication to the first UE indicating that the first resource is pre-allocated. Communication manager 815 may be an example of various aspects of communication manager 1110 described herein.

[0121] The communication manager 815 or its sub-components may be implemented in hardware, code executed by a processor (e.g., software or firmware), or any combination thereof. If implemented in code executed by a processor, the functionality of the communication manager 815 or its sub-components may be performed by a general-purpose processor, DSP, application-specific integrated circuit (ASIC), FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in this disclosure.

[0122] The communication manager 815 or its subcomponents may be physically located at various locations, including being distributed such that portions of the functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of this disclosure, the communication manager 815 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of this disclosure, the communication manager 815 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, transceivers, network servers, another computing device, one or more other components described in this disclosure, or combinations thereof.

[0123] Transmitter 820 can transmit signals generated by other components of device 805. In some examples, transmitter 820 may be co-located with receiver 810 in a transceiver module. For example, transmitter 820 may be a reference... Figure 11 Examples of various aspects of the transceiver 1120 described herein. The transmitter 820 may utilize a single antenna or an antenna set.

[0124] Figure 9 A block diagram 900 of an apparatus 905 supporting techniques for sidelink preemption indication in a wireless communication system, according to various aspects of this disclosure, is shown. Apparatus 905 may be an example of aspects of apparatus 805 or base station 105 as described herein. Apparatus 905 may include a receiver 910, a communication manager 915, and a transmitter 935. Apparatus 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0125] Receiver 910 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to techniques used for sidelink preemption indication in wireless communication systems). This information can be transmitted to other components of device 905. Receiver 910 can be a reference... Figure 11 Examples of various aspects of the transceiver 1120 described herein. The receiver 910 may utilize a single antenna or a set of antennas.

[0126] Communication manager 915 may be an example of aspects of communication manager 815 as described herein. Communication manager 915 may include control signal transmitter 920, preemption component 925, and SPI transmitter 930. Communication manager 915 may be an example of aspects of communication manager 1110 as described herein.

[0127] The control signal transmitter 920 can transmit control signaling to the first UE indicating a set of resources for a sidelink channel that can be used for sidelink communication with the second UE.

[0128] The preemption component 925 can determine which resource from the resource set should be preempted.

[0129] The SPI transmitter 930 can transmit a sidelink preemption indication to the first UE, indicating that the first resource has been preempted.

[0130] Transmitter 935 can transmit signals generated by other components of device 905. In some examples, transmitter 935 may be co-located with receiver 910 in a transceiver module. For example, transmitter 935 may be a reference... Figure 11 Examples of various aspects of the transceiver 1120 described. The transmitter 935 may utilize a single antenna or an antenna set.

[0131] Figure 10 A block diagram 1000 of a communication manager 1005 supporting techniques for sidelink preemption indication in a wireless communication system, according to various aspects of this disclosure, is shown. The communication manager 1005 may be an example of aspects of the communication manager 815, communication manager 915, or communication manager 1110 described herein. The communication manager 1005 may include a control signal transmitter 1010, a preemption component 1015, and an SPI transmitter 1020. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0132] The control signal transmitter 1010 can transmit control signaling to the first UE indicating a set of resources for a sidelink channel that can be used for sidelink communication with the second UE.

[0133] The preemption component 1015 can determine which resource from the resource set should be preempted.

[0134] The SPI transmitter 1020 can transmit a sidelink preemption indication to the first UE, indicating that a first resource has been preempted. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating a priority threshold. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating a zone identifier. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating a reference signal received power threshold. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating periodicity. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating a resource pool identifier. In some examples, the SPI transmitter 1020 can transmit a sidelink preemption indication indicating a broadcast type.

[0135] Figure 11 A diagram of a system 1100 including a device 1105 supporting techniques for sidelink preemption indication in a wireless communication system is shown according to various aspects of this disclosure. Device 1105 may be an example of device 805, device 905, or base station 105 as described herein, or a component including such devices. Device 1105 may include components for bidirectional voice and data communication, including components for transmitting and receiving communications, including a communication manager 1110, a network communication manager 1115, a transceiver 1120, an antenna 1125, a memory 1130, a processor 1140, and an inter-station communication manager 1145. These components may be in electronic communication via one or more buses (e.g., bus 1150).

[0136] The communication manager 1110 may transmit control signaling to the first UE indicating a set of resources for a sidelink channel that can be used for sidelink communication with the second UE; determine to pre-claim a first resource from the resource set; and transmit a sidelink pre-claim indication to the first UE indicating that the first resource is pre-claimed.

[0137] The network communication manager 1115 can manage communication with the core network (e.g., via one or more wired backhaul links). For example, the network communication manager 1115 can manage the delivery of data communication by client devices (such as one or more UEs 115).

[0138] Transceiver 1120 can communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, transceiver 1120 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 1120 may also include a modem to modulate packets and provide the modulated packets to the antenna for transmission, and to demodulate packets received from the antenna.

[0139] In some cases, the wireless device may include a single antenna 1125. However, in other cases, the device may have more than one antenna 1125, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0140] Memory 1130 may include RAM, ROM, or a combination thereof. Memory 1130 may store computer-readable code 1135 including instructions that, when executed by a processor (e.g., processor 1140), cause the device to perform the various functions described herein. In some cases, memory 1130 may, in particular, include a BIOS that controls basic hardware or software operations, such as interaction with peripheral components or devices.

[0141] Processor 1140 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, CPUs, microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 1140 may be configured to use a memory controller to operate a memory array. In some cases, the memory controller may be integrated into processor 1140. Processor 1140 may be configured to execute computer-readable instructions stored in memory (e.g., memory 1130) to cause device 1105 to perform various functions (e.g., functions or tasks supporting techniques for sidelink preemption indication in wireless communication systems).

[0142] Inter-site communication manager 1145 manages communication with other base stations 105 and may include a controller or scheduler for cooperating with other base stations 105 to control communication with UE 115. For example, inter-site communication manager 1145 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, inter-site communication manager 1145 may provide an X2 interface within LTE / LTE-A wireless communication network technology to facilitate communication between base stations 105.

[0143] Code 1135 may include instructions for implementing various aspects of this disclosure, including instructions for supporting wireless communication. Code 1135 may be stored in a non-transient computer-readable medium, such as system memory or other types of memory. In some cases, code 1135 may not be directly executed by processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0144] Figure 12A flowchart illustrating a method 1200 for supporting sidelink preemption indication in a wireless communication system according to various aspects of this disclosure is shown. Operation of method 1200 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1200 may be implemented by, as referred to... Figures 4 to 7 The described communication manager is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the following functions. Alternatively or alternatively, the UE can use dedicated hardware to perform aspects of the following functions.

[0145] At 1205, the UE can receive control signaling from the base station indicating a resource set of sidelink channels available for sidelink communication with the second UE. The operation of 1205 can be performed according to the methods described herein. In some examples, aspects of the operation of 1205 can be determined by reference to... Figures 4 to 7 The control signal receiver described is used to perform this action.

[0146] At 1210, the UE may receive a sidelink preemption indication indicating that at least a first resource from the resource set has been preempted. The operation of 1210 may be performed according to the methods described herein. In some examples, aspects of the operation of 1210 may be determined by reference to... Figures 4 to 7 The SPI component described is used to execute this.

[0147] At 1215, the UE can communicate sidelink transmissions with the second UE on the sidelink channel based on the sidelink preemption indication. The operation of 1215 can be performed according to the methods described herein. In some examples, aspects of the operation of 1215 can be described as follows: Figures 4 to 7 The described sidelink transport component is used to perform this.

[0148] Figure 13 A flowchart illustrating a method 1300 for supporting sidelink preemption indication in a wireless communication system according to various aspects of this disclosure is shown. Operation of method 1300 may be implemented by a UE 115 or its components as described herein. For example, operation of method 1300 may be implemented by, as referred to... Figures 4 to 7 The described communication manager is used to perform this function. In some examples, the UE can execute a set of instructions to control the functional elements of the UE to perform the following functions. Alternatively or alternatively, the UE can use dedicated hardware to perform aspects of the following functions.

[0149] At 1305, the UE can receive control signaling from the base station indicating a resource set of sidelink channels available for sidelink communication with the second UE. Operation of 1305 can be performed according to the methods described herein. In some examples, aspects of the operation of 1305 can be determined by reference to... Figures 4 to 7 The control signal receiver described is used to perform this action.

[0150] At 1310, the UE may receive a sidelink occupancy indication indicating that at least a first resource from the resource set has been occupied. Operation of 1310 may be performed according to the methods described herein. In some examples, aspects of operation of 1310 may be provided as referenced... Figures 4 to 7 The SPI component described is used to execute this.

[0151] At 1315, the UE can communicate sidelink transmissions with the second UE on the sidelink channel based on the sidelink preemption indication. The operation of 1315 can be performed according to the methods described herein. In some examples, aspects of the operation of 1315 can be derived from, as referenced... Figures 4 to 7 The described sidelink transport component is used to perform this.

[0152] At 1320, the UE can identify a priority threshold associated with the sidelink preemption indication. The operation of 1320 can be performed according to the methods described herein. In some examples, aspects of the operation of 1320 can be determined by referring to... Figures 4 to 7 The priority components described are used for execution.

[0153] Figure 14 A flowchart illustrating a method 1400 for supporting sidelink preemption indication in a wireless communication system according to various aspects of this disclosure is shown. Operation of method 1400 may be implemented by a base station 105 or its components as described herein. For example, operation of method 1400 may be implemented by referring to... Figures 8 to 11 The described communication manager is used to perform this. In some examples, the base station can execute a set of instructions to control the functional elements of the base station to perform the following functions. Additionally or alternatively, the base station may use dedicated hardware to perform aspects of the following functions.

[0154] At 1405, the base station may transmit control signaling to the first UE indicating a resource set of sidelink channels available for sidelink communication with the second UE. The operation of 1405 may be performed according to the methods described herein. In some examples, aspects of the operation of 1405 may be determined by reference to... Figures 8 to 11 The control signal transmitter described is used to execute this.

[0155] At 1410, the base station can determine whether to preemptively occupy the first resource from that resource set. The operation of 1410 can be performed according to the methods described herein. In some examples, aspects of the operation of 1410 can be derived as referenced... Figures 8 to 11 The preemptive component described is used for execution.

[0156] At 1415, the base station may transmit a sidelink preemption indication to the first UE, indicating that the first resource has been preempted. The operation of 1415 may be performed according to the methods described herein. In some examples, aspects of the operation of 1415 may be as described in reference... Figures 8 to 11 The described SPI transmitter is used to perform this.

[0157] It should be noted that the methods described in this paper describe possible implementations, and the operations and steps can be rearranged or otherwise modified, and other implementations are also possible. Furthermore, aspects from two or more methods can be combined.

[0158] The following provides an overview of various examples of the present invention:

[0159] Example 1: A method for wireless communication at a first user equipment (UE), comprising: receiving from a base station a resource set indicating a sidelink channel available for sidelink communication with a second UE; receiving a sidelink pre-emption indication indicating that at least a first resource from the resource set is pre-empted; and conveying a sidelink transmission to the second UE on the sidelink channel based at least in part on the sidelink pre-emption indication.

[0160] Example 2: The method of 1 further includes: identifying a priority threshold associated with the link preemption indication on that side.

[0161] Example 3: The method of any of Examples 1 to 2 further includes: determining that the priority of the sidelink transmission satisfies the priority threshold, wherein the sidelink transmission is communicated on the sidelink channel based at least in part on the priority of the sidelink transmission satisfying the priority threshold.

[0162] Example 4: The method of any of Examples 1 to 3 further includes: receiving a link preemption indication indicating the priority threshold.

[0163] Example 5: The method of any of Examples 1 to 4, wherein the priority threshold is configured at the UE for a carrier or a resource pool that includes the resource set.

[0164] Example 6: The method of any of Examples 1 to 5, wherein the priority threshold is configured by a shared configuration for a carrier or a resource pool including the resource set, the shared configuration being associated with multiple UEs active on the carrier or the resource pool.

[0165] Example 7: The method of any of Examples 1 to 6 further includes: identifying a reference signal received power measurement based at least in part on receiving the side link preemption indication; and determining that the reference signal received power measurement satisfies a threshold, wherein the side link transmission on the side link channel is conveyed at least in part based on the reference signal received power measurement satisfying the threshold.

[0166] Example 8: The method of any of Examples 1 to 7 further includes: receiving a link preemption indication indicating the threshold.

[0167] Example 9: The method of any of Examples 1 to 8 further includes: identifying the threshold based on the priority of the side link transmission, the priority of the side link transmission being indicated by the side link preemption indication.

[0168] Example 10: The method of any of Examples 1 to 9 further includes: receiving a side link priority indication of a zone identifier, a resource pool identifier, a carrier identifier, a priority periodicity, a broadcast type, or any combination thereof.

[0169] Example 11: The method of any of Examples 1 to 10 further includes: periodically or non-periodically receiving a link preemption indication on that side.

[0170] Example 12: The method of any of Examples 1 to 11 further includes: receiving a link priority indication corresponding to a first resource pool or a plurality of resource pools, the first resource pool or the plurality of resource pools including the resource set.

[0171] Example 13: The method of any of Examples 1 to 12 further includes: monitoring a second resource set to find the side link preemption indication, wherein receiving the side link preemption indication is at least partially based on the monitoring, the second resource set including resources different from the resource set or a subset of the resource set.

[0172] Example 14: The method of any of Examples 1 to 13 further includes: receiving a side link preemption indication corresponding to a first serving cell or a set of serving cells including the first serving cell.

[0173] Example 15: The method of any of Examples 1 to 14 further includes: receiving an indication that the side link preemption indication corresponds to the first serving cell or the set of serving cells.

[0174] Example 16: A method for wireless communication at a base station, comprising: transmitting to a first user equipment (UE) a resource set indicating a sidelink channel available for sidelink communication with a second UE; determining to pre-allocate a first resource from the resource set; and transmitting to the first user equipment (UE) a sidelink pre-allocation indication indicating that the first resource is pre-allocated.

[0175] Example 17: The method of Example 16, wherein transmitting the side link priority indication includes: transmitting the side link priority indication of the indication priority threshold.

[0176] Example 18: The method of Example 16 or 17 further includes: transmitting a link priority indication indicating the zoning identifier on that side.

[0177] Example 19: The method of any of Examples 16 to 18 further includes: transmitting an indication of the power threshold received by the reference signal on the receiving side of the link preemption indication.

[0178] Example 20: The method of any of Examples 16 to 19 further includes: transmitting an indication of periodic link preemption on that side.

[0179] Example 21: The method of any of Examples 16 to 20 further includes: transmitting a link preemption indication that indicates a resource pool identifier.

[0180] Example 22: The method of any of Examples 16 to 21 further includes: transmitting a link priority indication of the type of the instruction broadcast.

[0181] Example 23: An apparatus for wireless communication at a first user equipment (UE), comprising at least one means for performing a method as described in any of Examples 1 to 15.

[0182] Example 24: An apparatus for wireless communication at a first user equipment (UE), comprising: a processor; a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any of Examples 1 to 15.

[0183] Example 25: A non-transient computer-readable medium storing code for wireless communication at a first user equipment (UE), the code including instructions executable by a processor to perform methods such as any of Examples 1 to 15.

[0184] Example 26: An apparatus for wireless communication at a base station, comprising at least one means for performing a method as described in any of Examples 16 to 22.

[0185] Example 27: An apparatus for wireless communication at a base station, comprising: a processor; a memory in electronic communication with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any of Examples 16 to 22.

[0186] Example 28: A non-transient computer-readable medium storing code for wireless communication at a base station, the code including instructions executable by a processor to perform methods such as any of Examples 16 to 22.

[0187] While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein can also be applied to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques can be applied to a variety of other wireless communication systems, such as Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0188] The information and signals described herein can be represented using any of a wide variety of different techniques and methods. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or light particles, or any combination thereof.

[0189] The various illustrative boxes and components described herein can be implemented or executed using a general-purpose processor, DSP, ASIC, CPU, FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, or any other such configuration).

[0190] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations fall within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Features implementing the functions may also be physically located in various locations, including being distributed such that different parts of the function are implemented at different physical locations.

[0191] Computer-readable media includes both non-transient computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. Non-transient storage media can be any available medium accessible to a general-purpose or special-purpose computer. By way of example and not limitation, non-transient computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disc (CD) ROM or other optical disc storage, magnetic disk storage or other magnetic storage devices, or any other non-transient medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Similarly, any connection is also legitimately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then that coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of computer-readable media. As used in this article, disk and disc include CDs, laser discs, optical discs, DVDs, floppy disks, and Blu-ray discs, where disks often magnetically reproduce data while discs optically reproduce data using lasers. Combinations of these media are also included within the scope of computer-readable media.

[0192] As used herein (including in the claims), the word "or" in an enumeration of items (e.g., an enumeration of items accompanied by phrases such as "at least one of" or "one or more of") indicates an inclusive enumeration, such that an enumeration of at least one of, for example, 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). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "at least partially based on".

[0193] In the accompanying drawings, 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 apply to any of the similar components having the same first reference numeral, regardless of the second reference numeral or other subsequent reference numerals.

[0194] The descriptions herein, illustrated with reference to the accompanying drawings, depict exemplary configurations and are not representative of all examples that may be implemented or fall within the scope of the claims. The term "example" as used herein means "serving as an example, instance, or illustration" and does not imply "superior" or "outperforming" other examples. This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0195] The description provided herein is intended to enable those skilled in the art to make or use this disclosure. Various modifications to this disclosure will be apparent to those skilled in the art, and the universal principles defined herein can be applied to other variations without departing from the scope of this disclosure. Therefore, this disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a first user equipment (UE), comprising: receiving, from a network node, control signaling indicating a set of resources of a sidelink channel available for sidelink communications with a second UE, wherein the set of resources for the sidelink channel is shared with resources of an access link available for uplink or downlink communications with the network node; receiving a sidelink preemption indication indicating that at least a first resource from the set of resources is preempted; determining whether one or more parameters associated with the sidelink preemption indication satisfy one or more threshold values; and communicating, with the second UE, a sidelink transmission on the sidelink channel, wherein communicating includes applying or refraining from applying the sidelink preemption indication based on the determination.

2. The method of claim 1, further comprising: identifying a priority threshold associated with the sidelink preemption indication.

3. The method of claim 2, further comprising: determining that a priority of the sidelink transmission satisfies the priority threshold, wherein communicating the sidelink transmission on the sidelink channel is based at least in part on the priority of the sidelink transmission satisfying the priority threshold.

4. The method of claim 2, further comprising: receiving the sidelink preemption indication indicating the priority threshold.

5. The method of claim 2, wherein, the priority threshold is configured at the UE for a carrier or a resource pool including the set of resources.

6. The method of claim 2, wherein, the priority threshold is configured by a common configuration for a carrier or a resource pool including the set of resources, the common configuration being associated with a plurality of UEs active on the carrier or the resource pool.

7. The method of claim 1, further comprising: identifying a reference signal received power measurement based at least in part on receiving the sidelink preemption indication; and determining that the reference signal received power measurement satisfies a threshold value, wherein communicating the sidelink transmission on the sidelink channel is based at least in part on the reference signal received power measurement satisfying the threshold value.

8. The method of claim 7, further comprising: receiving the sidelink preemption indication indicating the threshold value.

9. The method of claim 7, further comprising: identifying the threshold value based on a priority of the sidelink transmission, the priority of the sidelink transmission being indicated by the sidelink preemption indication.

10. The method of claim 1, further comprising: receiving the sidelink preemption indication indicating a zone identifier, a resource pool identifier, a carrier identifier, a periodicity of preemption, a cast type, or any combination thereof.

11. The method of claim 1, further comprising: periodically or aperiodically receiving the sidelink preemption indication.

12. The method of claim 1, further comprising: receiving the sidelink preemption indication corresponding to a first resource pool or a plurality of resource pools, the first resource pool or the plurality of resource pools including the set of resources.

13. The method of claim 1, further comprising: ​ monitoring a second set of resources for the sidelink preemption indication, wherein receiving the sidelink preemption indication is based at least in part on the monitoring, the second set of resources comprising different resources or a subset of the set of resources.

14. The method of claim 1, further comprising: receiving the sidelink preemption indication corresponding to a first serving cell or a set of serving cells including the first serving cell.

15. The method of claim 14, further comprising: receiving an indication that the sidelink preemption indication corresponds to the first serving cell or the set of serving cells.

16. A method for wireless communication at a network node, comprising: transmitting, to a first user equipment (UE), control signaling indicating a set of resources of a sidelink channel usable for sidelink communications with a second UE, wherein the set of resources for the sidelink channel is shared with resources of an access link usable for uplink or downlink communications with the first UE; determining to preempt a first resource from the set of resources; and transmitting, to the first user equipment (UE), a sidelink preemption indication indicating that the first resource is preempted.

17. The method of claim 16, wherein, transmitting the sidelink preemption indication comprises: transmitting the sidelink preemption indication indicating a priority threshold.

18. The method of claim 16, further comprising: transmitting the sidelink preemption indication indicating a zone identifier.

19. The method of claim 16, further comprising: transmitting the sidelink preemption indication indicating a reference signal received power threshold.

20. The method of claim 16, further comprising: transmitting the sidelink preemption indication indicating a periodicity.

21. The method of claim 16, further comprising: transmitting the sidelink preemption indication indicating a resource pool identifier.

22. The method of claim 16, further comprising: transmitting the sidelink preemption indication indicating a broadcast type.

23. An apparatus for wireless communication at a first user equipment (UE), comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: receive, from a network node, control signaling indicating a set of resources of a sidelink channel usable for sidelink communications with a second UE, wherein the set of resources for the sidelink channel is shared with resources of an access link usable for uplink or downlink communications with the network node; receive a sidelink preemption indication indicating that at least a first resource from the set of resources is preempted; determine whether one or more parameters associated with the sidelink preemption indication satisfy one or more threshold values; and communicate, with the second UE, a sidelink transmission on the sidelink channel, wherein communicating includes applying or refraining from applying the sidelink preemption indication based on the determination.

24. The apparatus of claim 23, wherein, the instructions are further executable by the processor to cause the apparatus to: identify a priority threshold associated with the sidelink preemption indication.

25. The apparatus of claim 24, wherein, The instructions are executable by the processor to further cause the apparatus to: determine that a priority of the sidelink transmission satisfies the priority threshold, wherein communicating the sidelink transmission on the sidelink channel is based at least in part on the priority of the sidelink transmission satisfying the priority threshold.

26. The apparatus of claim 24, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication indicating the priority threshold.

27. The apparatus of claim 24, wherein, The priority threshold is configured at the UE for a carrier or a resource pool comprising the set of resources.

28. The apparatus of claim 24, wherein, The priority threshold is configured by a common configuration for a carrier or a resource pool comprising the set of resources, the common configuration being associated with a plurality of UEs active on the carrier or the resource pool.

29. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: identify a reference signal received power measurement based at least in part on receiving the sidelink preemption indication; and determine that the reference signal received power measurement satisfies a threshold, wherein communicating the sidelink transmission on the sidelink channel is based at least in part on the reference signal received power measurement satisfying the threshold.

30. The apparatus of claim 29, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication indicating the threshold.

31. The apparatus of claim 29, wherein, The instructions are executable by the processor to further cause the apparatus to: identify the threshold based on a priority of the sidelink transmission, the priority of the sidelink transmission being indicated by the sidelink preemption indication.

32. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication indicating a zone identifier, a resource pool identifier, a carrier identifier, a periodicity of preemption, a broadcast type, or any combination thereof.

33. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication periodically or aperiodically.

34. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication corresponding to a first resource pool or a plurality of resource pools, the first resource pool or the plurality of resource pools comprising the set of resources.

35. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: monitor a second set of resources for the sidelink preemption indication, wherein receiving the sidelink preemption indication is based at least in part on the monitoring, the second set of resources comprising different resources or a subset of the set of resources.

36. The apparatus of claim 23, wherein, The instructions are executable by the processor to further cause the apparatus to: receive the sidelink preemption indication corresponding to a first serving cell or a set of serving cells comprising the first serving cell.

37. The apparatus of claim 36, wherein, The instructions are executable by the processor to further cause the apparatus to: receive an indication that the sidelink preemption indication corresponds to the first serving cell or the set of serving cells.

38. An apparatus for wireless communication at a network node, comprising: a processor, memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to: transmitting, to a first user equipment (UE), control signaling indicating a set of resources of a sidelink channel available for sidelink communications with a second UE, wherein the set of resources for the sidelink channel is shared with resources for an access link available for uplink communications or downlink communications with the first UE; determining that a first resource from the set of resources is to be preempted; and transmitting, to the first user equipment (UE), a sidelink preemption indication indicating that the first resource is preempted.

39. The apparatus of claim 38, wherein, The instructions to transmit the sidelink preemption indication can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a priority threshold.

40. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a zone identifier.

41. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a reference signal received power threshold.

42. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a periodicity.

43. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a resource pool identifier.

44. The apparatus of claim 38, wherein, The instructions can be further executable by the processor to cause the apparatus to: transmit the sidelink preemption indication indicating a broadcast type.

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