Sidelink control signaling with transmit beam indication

Abstract

Various aspects of the disclosure generally relate to wireless communication. In some aspects, a first UE can receive, from a second UE, resource reservation sidelink control information indicating a transmit beam of the second UE and a sidelink resource of the second UE. The first UE can transmit data on the sidelink resource of the second UE using a transmit beam of the first UE that is spatially non-overlapping with the transmit beam of the second UE. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 072,588, filed August 31, 2020, entitled “SIDELINK CONTROL SIGNALING WITH TRANSMIT BEAM INDICATIONS,” and U.S. Non-Provisional Patent Application No. 17 / 445,279, filed August 17, 2021, entitled “SIDELINK CONTROL SIGNALING WITH TRANSMIT BEAM INDICATIONS,” both of which are expressly incorporated herein by reference. Technical Field

[0003] Various aspects of this disclosure generally relate to wireless communication, and to techniques and apparatus for sidelink control signaling with transmit beam indication. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone communication, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / LTE-Advanced is a collection of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that can support communication for user equipment (UE) or multiple UEs. UEs may communicate with base stations via downlink and uplink communication. "Downlink" (or "DL") refers to the communication link from the base station to the UE, and "uplink" (or "UL") refers to the communication link from the UE to the base station.

[0006] The aforementioned multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different UEs to communicate at the municipal, national, regional, and even global levels. New Radio (NR), also known as 5G, is a collection of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (CP-OFDM), and CP-OFDM and / or Single Carrier Frequency Division Multiplexing (SC-FDM) (also known as Discrete Fourier Transform Extended OFDM (DFT-s-OFDM)) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technologies and carrier aggregation to better support mobile broadband internet access. With the continuous increase in demand for mobile broadband access, there is a need for further improvements to LTE, NR, and other radio access technologies. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a first UE includes: receiving resource reservation sidelink control information (RR-SCI) from a second UE that indicates the second UE's transmit beam and the second UE's sidelink resources; and transmitting data on the second UE's sidelink resources using the first UE's transmit beam, which does not spatially overlap with the second UE's transmit beam.

[0008] In some aspects, a method of wireless communication performed by a first UE includes: receiving an RR-SCI from a second UE; and determining, at least in part, the sidelink resources of a third UE and the transmit beam of the third UE based on the relayed RR-SCI.

[0009] In some aspects, a first UE for wireless communication includes: a memory and one or more processors coupled to the memory, the one or more processors being configured to: receive RR-SCIs from a second UE indicating the transmit beam of the second UE and the sidelink resources of the second UE; and transmit data on the sidelink resources of the second UE using the transmit beam of the first UE that does not spatially overlap with the transmit beam of the second UE.

[0010] In some aspects, a first UE for wireless communication includes: a memory and one or more processors coupled to the memory, the one or more processors being configured to: receive RR-SCI from a second UE; and determine, at least in part, the sidelink resources of a third UE and the transmit beam of the third UE based on the relayed RR-SCI.

[0011] In some aspects, a non-transitory computer-readable medium stores a set of instructions for wireless communication, including one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to perform the following operations: receive from a second UE an RR-SCI indicating the second UE's transmit beam and the second UE's sidelink resources; and transmit data on the second UE's sidelink resources using the first UE's transmit beam, which does not spatially overlap with the second UE's transmit beam.

[0012] In some aspects, a non-transitory computer-readable medium stores a set of instructions for wireless communication, including one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to perform the following operations: receive an RR-SCI from a second UE; and determine, at least in part, the sidelink resources of a third UE and the transmit beam of the third UE based on the relayed RR-SCI.

[0013] In some aspects, a first device for wireless communication includes: a component for receiving from a second device an RR-SCI indicating the transmit beam of the second device and the side link resources of the second device; and a component for transmitting data on the side link resources of the second device using the transmit beam of the first device that does not spatially overlap with the transmit beam of the second device.

[0014] In some aspects, a first device for wireless communication includes: components for receiving RR-SCI from a second device; and components for determining the sidelink resources of a third device and the transmit beam of the third device based at least in part on the relayed RR-SCI.

[0015] The aspects generally include, as described generally with reference to the accompanying drawings and description, and as shown in the accompanying drawings and description, methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems.

[0016] The foregoing has provided a fairly broad overview of the features and technical advantages of the examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can readily serve as the basis for modifications or designs of other structures used to achieve the same purpose of this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for illustrative and descriptive purposes and not as a definition of limitation of the claims.

[0017] While aspects are described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The techniques described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / procurement devices, medical devices, and / or artificial intelligence devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices and features incorporating said aspects may include additional components and features to implement and practice the claimed and described aspects. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers). The aim is that the aspects described herein can be implemented in a wide variety of devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. Attached Figure Description

[0018] To gain a detailed understanding of the foregoing features of this disclosure, a more specific description of the above-briefly summarized contents can be obtained by referring to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and should not be considered as limiting its scope, as the description may allow for other equivalent aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 This is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 This is a diagram illustrating an example of a base station communicating with a UE in a wireless network according to the present disclosure.

[0021] Figure 3 This is a diagram illustrating an example of sidelink communication according to this disclosure.

[0022] Figure 4 This is a diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0023] Figure 5 This is a diagram illustrating an example of sidelink communication between multiple nodes according to this disclosure.

[0024] Figures 6-12This is a diagram illustrating an example of side-link control signaling with transmit beam indication according to this disclosure.

[0025] Figures 13-14 This is a diagram illustrating an example process associated with sidelink control signaling having a transmit beam indication, according to this disclosure. Detailed Implementation

[0026] Various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, any number of aspects set forth herein may be used to implement an apparatus or practice. Furthermore, the scope of this disclosure is intended to cover such apparatus or methods practiced using structures, functions, or structures and functions other than or different from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0027] Several aspects of a telecommunications system will now be presented with reference to various apparatuses and techniques. These apparatuses and methods will be described in detail below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively, “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0028] While the terms commonly associated with 5G or New Radio (NR) Radio Access Technology (RAT) may be used to describe the aspects herein, the aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0029] Figure 1This is a diagram illustrating a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, as well as other examples. The wireless network 100 may include one or more base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE 120a, UE 120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. Base station 110 is the entity that communicates with UE 120. Base station 110 (sometimes referred to as BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a Transmit / Receive Point (TRP). Each base station 110 may provide communication coverage for a specific geographic area. In the 3rd Generation Partnership Project (3GPP), the term "cell" can refer to the coverage area of ​​base station 110 and / or the base station subsystem serving that coverage area, depending on the context in which the term is used.

[0030] Base station 110 can provide communication coverage for macro cells, pico cells, femtocells, and / or another type of cell. A macro cell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access for UE 120 with a service subscription. A pico cell can cover a relatively small geographic area and can allow unrestricted access for UE 120 with a service subscription. A femtocell can cover a relatively small geographic area (e.g., a home) and can allow restricted access for UE 120 associated with the femtocell (e.g., UE 120 in a Closed Subscriber Group (CSG)). Base station 110 for macro cells can be referred to as a macro base station. Base station 110 for pico cells can be referred to as a pico base station. Base station 110 for femtocells can be referred to as a femtocell or a home base station. Figure 1 In the example shown, BS 110a can be a macro base station for macro cell 102a, BS 110b can be a pico base station for pico cell 102b, and BS 110c can be a femto base station for femto cell 102c. A base station can support one or more (e.g., three) cells.

[0031] In some examples, the cell may not necessarily be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile base station 110 (e.g., a mobile base station). In some examples, base station 110 may interconnect with each other and / or with one or more other base stations 110 or network nodes (not shown) in the wireless network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0032] The wireless network 100 may also include one or more relay stations. A relay station is an entity that can receive data transmissions from an upstream station (e.g., base station 110 or UE 120) and transmit data transmissions to a downstream station (e.g., UE 120 or base station 110). A relay station can also be a UE 120 that can relay transmissions for other UE 120s. Figure 1 In the example shown, relay BS 110d (e.g., relay base station) can communicate with macro BS 110a (e.g., macro base station) and UE 120d to facilitate communication between BS 110a and UE 120d. The base station for relay communication can also be referred to as a relay station, relay base station, relay, etc.

[0033] Wireless network 100 can be a heterogeneous network comprising different types of base stations 110 (such as macro base stations, pico base stations, femto base stations, relay base stations, etc.). These different types of base stations 110 can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro base stations can have high transmit power levels (e.g., 5 to 40 watts), while pico base stations, femto base stations, and relay base stations can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0034] Network controller 130 may be coupled to or communicate with a set of base stations 110, and may provide coordination and control for these base stations 110. Network controller 130 may communicate with base stations 110 via backhaul communication links. Base stations 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links.

[0035] UE 120 may be distributed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE 120 may be a cellular phone (e.g., a smartphone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a bio-device, a wearable device (e.g., a smartwatch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, industrial manufacturing equipment, a GPS device, or any other suitable device configured to communicate via a wireless medium.

[0036] Some UEs 120 may be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (Narrowband IoT) devices. Some UEs 120 may be considered customer premises equipment. UE 120 may be included within a housing that houses the components of UE 120, such as processor components and / or memory components. In some examples, the processor components and memory components may be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) may be operatively coupled, communicatively coupled, electrically coupled, and / or electrically coupled.

[0037] Typically, any number of wireless networks 100 can be deployed in a given geographical area. Each wireless network 100 can support a specific RAT and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary). For example, UEs 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UEs 120 may perform scheduling operations, resource selection operations, and / or other operations performed by base station 110 as described elsewhere herein.

[0039] Devices in Wireless Network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in Wireless Network 100 can communicate using one or more operating frequency bands. In 5G NR, two initial operating frequency bands have been designated as frequency ranges FR1 (410MHz–7.125GHz) and FR2 (24.25GHz–52.6GHz). It should be understood that although a portion of FR1 is above 6GHz, FR1 is generally (interchangeably) referred to as the “sub-6GHz” band in various documents and articles. Similar naming issues sometimes occur with FR2, which is generally (interchangeably) referred to as the “millimeter wave” band in documents and articles, although it is different from the Extremely High Frequency (EHF) band (30GHz–300GHz) designated as a “millimeter wave” band by the International Telecommunication Union (ITU).

[0040] The frequencies between FR1 and FR2 are generally referred to as intermediate frequency (IF) bands. Recent 5G NR research has identified the operating bands of these IF bands as the frequency range designation FR3 (7.125 GHz – 24.25 GHz). Bands falling into FR3 can inherit the characteristics of FR1 and / or FR2, thus effectively extending the characteristics of FR1 and / or FR2 to the IF band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating frequency bands have been identified as the frequency range designations FR4a or FR4-1 (52.6 GHz – 71 GHz), FR4 (52.6 GHz – 114.25 GHz), and FR5 (114.25 GHz – 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0041] Considering the examples above, unless otherwise explicitly stated, the terms "sub-6GHz" and the like (if used herein) should be understood to broadly refer to frequencies that can be below 6GHz, frequencies that can be within FR1, and / or frequencies that can include intermediate frequency bands. Furthermore, unless otherwise explicitly stated, the terms "millimeter wave" and the like (if used herein) should be understood to broadly refer to frequencies that can include intermediate frequency bands, frequencies that can be within FR2, FR4, FR4-a, or FR4-1 and / or FR5, or frequencies that can be within the EHF band. It is contemplated that frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, or FR4-1 and / or FR5) can be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0042] As indicated above, provide Figure 1 As an example. Other examples can be related to... Figure 1 The descriptions are different.

[0043] Figure 2 This is a diagram illustrating an example 200 of a base station 110 communicating with a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with antenna sets 234a to 234t, such as T antennas (T≥1), and the UE 120 may be equipped with antenna sets 252a to 252r, such as R antennas (R≥1).

[0044] At base station 110, transmitting processor 220 can receive data from data source 212 intended for use by UE 120 (or a set of UE 120). Transmitting processor 220 can select one or more modulation and coding schemes (MCS) for each UE 120, at least in part, based on channel quality indicators (CQIs) received from the UE 120. UE 120 can process (e.g., encode and modulate) data for that UE 120, at least in part, based on the MCS selected for each UE 120, and provide data symbols for the UE 120. Transmitting processor 220 can process system information (e.g., for semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper-layer signaling), and provide overhead symbols and control symbols. Transmitting processor 220 can generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signal (PSS) and secondary synchronization signal (SSS)). Where applicable, the transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and can provide a set of output symbol streams (e.g., T output symbol streams) to the corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream can be provided to a modulator component (shown as MOD) of modem 232. Each modem 232 can use a corresponding modulator component to process the corresponding output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 can further use a corresponding modulator component to process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream to obtain a downlink signal. Modems 232a to 232t can transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0045] At UE 120, antenna set 252 (shown as antennas 252a to 252r) can receive downlink signals from base station 110 and / or other base stations 110, and can provide the received signal set (e.g., R received signals) to modem set 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal can be provided to a demodulator component (shown as DEMOD) of modem 254. Each modem 254 can use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain an input sample. Each modem 254 can use the demodulator component to further process the input sample (e.g., for OFDM) to obtain the received symbols. MIMO detector 256 can obtain the received symbols from modem 254, perform MIMO detection on the received symbols, and provide the detected symbols, if applicable. Receiver processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine Reference Signal Received Power (RSRP) parameters, Received Signal Strength Indicator (RSSI) parameters, Reference Signal Received Quality (RSRQ) parameters, and / or Channel Quality Indicator (CQI) parameters, among other examples. In some examples, one or more components of UE 120 may be included in housing 284.

[0046] Network controller 130 may include communication unit 294, controller / processor 290, and memory 292. Network controller 130 may include one or more devices, such as those in a core network. Network controller 130 may communicate with base station 110 via communication unit 294.

[0047] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included in one or more antenna panels, one or more antenna groups, one or more antenna element sets, and / or one or more antenna arrays, among other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include (within a single housing or multiple housings) one or more antenna elements, coplanar antenna element sets, non-coplanar antenna element sets, and / or be coupled to one or more transmitting and / or receiving components (such as…) Figure 2 One or more antenna elements (one or more components).

[0048] On the uplink, at UE 120, the transmit processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 can generate reference symbols for one or more reference signals. Where applicable, symbols from the transmit processor 264 can be pre-coded by the TX MIMO processor 266, further processed by the modulator-modulator 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some examples, the modem 254 of UE 120 may include a modulator and demodulator. In some examples, UE 120 may include a transceiver. The transceiver may include any combination of antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver can be used by a processor (e.g., controller / processor 280) and memory 282 to perform any of the methods described herein (e.g., reference 282). Figures 6-14 (All aspects of)

[0049] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by modem 232 (e.g., demodulator component of modem 232, shown as MEMOD), detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communication. In some examples, modem 232 of base station 110 may include modulator and demodulator. In some examples, base station 110 includes transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform any of the methods described herein (e.g., referencing...). Figures 6-14 (All aspects of)

[0050] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2Any other component(s) may perform one or more techniques associated with sidelink control signaling having transmit beam indication, as described in more detail elsewhere herein. For example, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component(s) can perform or direct, for example Figure 13 Process 1300 Figure 14 The operation of process 1400 and / or other processes described herein. Memory 242 and memory 282 may store data and program code of base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly executed, or executed after compilation, transformation, and / or parsing), may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example... Figure 13 Process 1300 Figure 14 The operation of process 1400 and / or other processes described herein. In some examples, execution instructions may include run instructions, transform instructions, compile instructions and / or parse instructions, among others.

[0051] In some aspects, the UE (e.g., UE 120) may include: components for receiving resource reservation sidelink control information (RR-SCI) from the second UE, indicating the transmit beam of the second UE and the sidelink resources of the second UE, and / or components for transmitting data on the sidelink resources of the second UE using the transmit beam of the first UE that does not spatially overlap with the transmit beam of the second UE. In some aspects, such components may include combinations of Figure 2 One or more components in the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0052] In some aspects, the UE (e.g., UE 120) may include: components for receiving relayed resource reservation sidelink control information (RR-SCI) from a second UE, and / or components for determining the sidelink resources of a third UE and the transmit beam of the third UE based at least in part on the relayed RR-SCI. In some aspects, such components may include combinations of... Figure 2One or more components in the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0053] Although Figure 2 The blocks are illustrated as different components, but the functions described above with respect to these blocks can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 can be performed by or under the control of the controller / processor 280.

[0054] As indicated above, provide Figure 2 As an example. Other examples can be related to... Figure 2 The descriptions are different.

[0055] Figure 3 This is a diagram illustrating example 300 of sidelink communication according to this disclosure.

[0056] like Figure 3 As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UE 305-1 and UE 305-2 can use one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., may include V2V communication, V2I communication, and / or vehicle-to-person (V2P) communication), and / or mesh network communication. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) may include one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface, operate in a high-frequency band (e.g., the 5.9 GHz band), and / or operate in an unlicensed or shared band (e.g., the NR unlicensed (NR-U) band). Additionally or alternatively, UE 305 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of Transmission Time Intervals (TTIs) (e.g., frames, subframes, time slots, and / or symbols).

[0057] like Figure 3As further shown, one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a Physical Sidelink Shared Channel (PSSCH) 320, and / or a Physical Sidelink Feedback Channel (PSFCH) 325. PSCCH 315 can be used for communication control information, similar to a Physical Downlink Control Channel (PDCCH) and / or a Physical Uplink Control Channel (PUCCH) used for cellular communication with base station 110 via an access link or access channel. PSSCH 320 can be used for communication data, similar to a Physical Downlink Shared Channel (PDSCH) and / or a Physical Uplink Shared Channel (PUSCH) used for cellular communication with base station 110 via an access link or access channel.

[0058] PSCCH 315 may carry a sidelink control information section 1 (SCI-1) 330, which may indicate various control information for sidelink communication. The control information may include: indications of one or more resources (e.g., time resources, frequency resources, and / or spatial resources) (where various types of information may be carried on PSCCH 320), information for decoding sidelink communication on PSCCH 320, Quality of Service (QoS) priority values, resource reservation periods, PSCCH demodulation reference signal (DMRS) mode, the SCI format and β offset of the sidelink control information section 2 (SCI-2) 335 transmitted on PSCCH 320, the number of PSCCH DMRS ports, and / or modulation and coding scheme (MCS).

[0059] The information carried on PSSCH 320 may include SCI-2 335 and / or data 340. SCI-2 335 may include various types of information, such as a Hybrid Automatic Repeat Request (HARQ) process ID, a New Data Indicator (NDI) associated with data 340, a source identifier, a destination identifier, and / or a Channel State Information (CSI) report trigger. In some aspects, UE 305 may transmit both SCI-1 330 and SCI-2 335. In some aspects, UE 305 may transmit only SCI-1 330, in which case one or more types of information that would be transmitted in SCI-2 335 may alternatively be transmitted in SCI-1 330.

[0060] PSFCH 325 can be used for communication-side link feedback 345, such as HARQ feedback (e.g., acknowledgment or negative acknowledgment (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0061] As indicated above, provide Figure 3 As an example. Other examples can be related to... Figure 3 The descriptions are different.

[0062] Figure 4 This is a diagram illustrating example 400 of sidelink communication and access link communication according to this disclosure.

[0063] like Figure 4 As shown, the transmitter (Tx) / receiver (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As described. Further, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, base station 110 may communicate with Rx / Tx UE 410 via a second access link. Tx / Rx UE 405 and / or Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as... Figure 1 UE 120. Therefore, the direct link between UE 120 (e.g., via the PC5 interface) can be referred to as a side link, and the direct link between base station 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Side link communication can be transmitted via the side link, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0064] As indicated above, provide Figure 4 As an example. Other examples can be related to... Figure 4 The descriptions are different.

[0065] A Tx UE can send an SCI-1 in the PSCCH to indicate resource reservation for sidelink communication. This resource reservation can be sent to reserve resources for up to three retransmissions in periodic mode. For example, the SCI-1 can be configured using Radio Resource Control (RRC) signaling to reserve up to one or two additional time slots for the 32-slot duration of the first transmission from the Tx UE. The resource reservation included in the SCI-1 can be for retransmission of the current Transport Block (TB). When the current TB is successfully decoded, the resources reserved through the resource reservation can be released (e.g., the resources can be released from the upper layer), and new random resources can be selected for transmission of other TBs by the Tx UE. Resource reservations (not used since the current TB was successfully decoded) may not be reused for transmission of new TBs by the Tx UE.

[0066] Tx UEs can send SCI-1 to periodically reserve resources for retransmission. SCI-1 can include a period value. For example, the period value can range from 1 to 99 time slots, or the period value can be 100, 200, ..., 1000, where 0 indicates no periodic reservation. Resource reservation can be periodic to handle the reservation of the next instance of a periodic traffic pattern.

[0067] A UE (e.g., a Tx UE) can be triggered to report available or reserved resources via upper-layer signaling. The report can be generated at least in part based on historical SCI-1 monitoring, taking into account reserved resources, the priority of monitored SCI-1, etc.

[0068] For the monitored SCI-1, the UE can reserve resources for the current transmission and up to two subsequent transmissions (e.g., up to three transmissions in total). Additionally, the UE can reserve resources for up to three instances in the next instance of the indicated period (e.g., when a non-zero period is indicated).

[0069] When the UE is unable to monitor SCI-1 due to half-duplex limitations at the UE, the UE may assume that SCI-1 is being transmitted in the time slot. Even when the UE cannot detect SCI-1 due to half-duplex limitations, the UE may still assume that SCI-1 is being transmitted in that time slot. In this case, the UE may block the time slots that may be indicated in SCI-1. Additionally, the UE may block time slots for time periods that may be configured by SCI-1 (e.g., up to 15 time slots).

[0070] Beam scanning waveforms and procedures based on synchronization signal blocks (SSBs) or PSSCHs can be used to train Tx / Rx beams for Tx / Rx nodes. For example, a Tx / Rx UE can track Tx / Rx beams at least in part based on a beam-scanning SSB (S-SSB) or a beam-scanning PSSCH periodically sent to the Tx / Rx UE. The beam-scanning PSSCH can be sent to the Tx / Rx UE before data transmission for Tx / Rx beam selection.

[0071] After establishing a Tx / Rx beam for a Tx UE, the Tx UE can perform data transmission via a narrow beam. Omnidirectional Resource Reservation (RR) SCI-1, which reserves resources for data transmission, prevents other Tx / Rx UEs from using the reserved resources associated with the RR SCI-1. When operating in a high-frequency band, the omnidirectional RR SCI-1 may not achieve the same coverage as the beamforming PSSCH. Therefore, the omnidirectional RR SCI-1 may not be detected by other Tx UEs, potentially causing interference on reserved resources between Tx UEs.

[0072] Figure 5This is a diagram illustrating example 500 of sidelink communication between multiple nodes according to this disclosure.

[0073] like Figure 5 As shown, Tx UE A (e.g., Tx Node A) can use a first Tx beam (Tx beam 0) to send data packets to Rx UE C (e.g., Rx Node C). Rx UE C can use the Rx beam to receive data packets. Tx UE A can also use a second Tx beam (Tx beam 1) and a third Tx beam (Tx beam 2) to send data packets. Furthermore, Tx UE B (e.g., Tx Node B) can use a Tx beam to send data packets to Rx UE D (e.g., Rx Node D), and Rx UE D can use the Rx beam to receive data packets. Data packets sent by Tx UE A and Tx UE B can be sent via a directional sidelink. Tx beams can be associated with Tx UEs, and Rx beams can be associated with Rx UEs.

[0074] Tx UE A can send data packets to Rx UE C and reserve upcoming sidelink resources using omnidirectional RR SCI-1. In a legacy system, Tx UE B can receive omnidirectional RR SCI-1 from Tx UE A. Tx UE B may be unable to send data packets to Rx UE D on the reserved sidelink resources indicated by the omnidirectional RR SCI-1 received from Tx UE A, even if data packets sent from Tx UE B may not interfere with data packet transmission between Tx UE A and Rx UE C. Due to spatial multiplexing (SDM), data packets sent by Tx UE B can be transmitted without interfering with data packets sent by Tx UE A. Using SDM, Tx UE B can safely transmit on reserved sidelink resources associated with Tx UE A and vice versa, without causing interference on those reserved sidelink resources.

[0075] However, in traditional systems, Tx UE B cannot determine whether the sidelink resources reserved by Tx UE A are associated with a Tx beam that is inconsistent with the Tx beam of Tx UE B. In other words, Tx UE B cannot determine whether different Tx beams are used at Tx UE B and Tx UE A respectively. Therefore, directional sidelink transmissions from Tx UE B will not conflict with directional sidelink transmissions from Tx UE A.

[0076] As indicated above, provide Figure 5 As an example. Other examples can be related to... Figure 5 The descriptions are different.

[0077] In various aspects of the techniques and apparatus described herein, a first UE can receive an RR-SCI indicating the Tx beam of the second UE and the sidelink resources of the second UE from a second UE. When the Tx beam of the first UE and the Tx beam of the second UE do not overlap spatially, the first UE can use the Tx beam of the first UE to transmit data on the sidelink resources of the second UE. In other words, the first UE can determine, at least in part, that the second UE uses a different Tx beam compared to the first UE based on the Tx beam of the second UE indicated in the RR-SCI. When the Tx beams of the first UE and the second UE are different, the first UE can transmit on the same sidelink resources reserved by the second UE. Therefore, the first UE can avoid unnecessarily avoiding the use of sidelink resources reserved by the second UE without causing a conflict with the second UE due to the first UE and the second UE using different Tx beams.

[0078] Figure 6 This is a diagram illustrating example 600 of sidelink control signaling with Tx beam indication according to this disclosure. Figure 6 As shown, Example 600 includes communication between a first UE (e.g., UE 120a), a second UE (e.g., UE 120e), a third UE (e.g., UE 120f), and a fourth UE (e.g., UE 120g). In some aspects, the first UE and the second UE may be included in a wireless network such as wireless network 100. The first UE and the second UE may communicate on a wireless sidelink.

[0079] As shown by reference numeral 602 in the attached figure, a second UE (Tx UE A) may transmit an RR-SCI. This RR-SCI may be received at a third UE (Rx UE C). The RR-SCI may also be received at a first UE (Tx UE B). The RR-SCI may indicate the Tx beam of the second UE (e.g., a reserved Tx beam of the second UE). The RR-SCI may indicate an identifier associated with the second UE (e.g., a Tx UE ID). The RR-SCI may include sidelink resources of the second UE (e.g., reserved sidelink resources of the second UE). The Tx beam indicated in the RR-SCI may be different from the beam that transmitted the RR-SCI.

[0080] In some aspects, the first UE can receive periodic S-SSBs from the second UE. These periodic S-SSBs can indicate an identifier associated with the second UE. The first UE can then receive RR-SCIs from the second UE, at least in part, based on the periodic S-SSBs received from the second UE.

[0081] In some aspects, the first UE may perform a PSSCH scan. The first UE may determine the identifier associated with the second UE based at least in part on the PSSCH scan. The first UE may then receive RR-SCI from the second UE based at least in part on the PSSCH scan.

[0082] As shown by reference numeral 604 in the attached figure, a first UE can transmit data on the sidelink resources of the second UE using the Tx beam of the first UE, which does not spatially overlap with the Tx beam of the second UE. The first UE can transmit data to a fourth UE (Rx UED). Before transmitting data, the first UE can determine that the Tx beam of the second UE does not conflict with the Tx beam of the first UE (e.g., spatially overlaps). The first UE can determine the Tx beam of the second UE at least in part based on the RR-SCI received from the second UE. After determining that the Tx beams of the first UE and the second UE do not spatially overlap, the first UE can transmit data on the sidelink resources of the second UE.

[0083] In some aspects, a Tx beam associated with a Tx UE (e.g., Tx UE A) can be used by the Tx UE on sidelink resources, while other Tx UEs (e.g., Tx UE B) can use different Tx beams on the same sidelink resources. Due to SDM, multiple transmissions by multiple Tx UEs on the same sidelink resources can proceed without conflict when multiple Tx UEs each use different Tx beams.

[0084] In some aspects, multiple Tx-Rx UE pairs (e.g., the first pair of Tx UE A and Rx UE C, and the second pair of Tx UE B and Rx UE D) can be spatially multiplexed on the same sidelink resources. To enable multiple Tx-Rx UE pairs to spatially multiplexed on the same sidelink resources, the PSCCH on subsequent sidelink resources (except for the initial PSCCH carrying the directional RR-SCI) can be transmitted using a narrow beam.

[0085] As indicated above, provide Figure 6 As an example. Other examples can be related to... Figure 6 The descriptions are different.

[0086] Figure 7 This is a diagram illustrating an example 700 of sidelink control signaling with Tx beam indication according to this disclosure.

[0087] like Figure 7 As shown, Tx UE A( Figure 6 The second UE in the middle can be connected with Rx UE C ( Figure 6 The third UE in the system communicates with the third UE. Tx UE B ( Figure 6The first UE in the middle can be connected with Rx UE D( Figure 6 Tx UE A can be configured to use a first Tx beam (Tx beam 0), a second Tx beam (Tx beam 1), and a third Tx beam (Tx beam 2). The first and second Tx beams can be associated with a first direction, and the third Tx beam can be associated with a second direction opposite to the first direction. Rx UE C can be configured to use an Rx beam. Tx UE B can be configured to use a Tx beam, and Rx UE D can be configured to use an Rx beam. Additionally, in this example, Tx UE E can communicate with Rx UE F.

[0088] As an example, Tx UE A can send an RR-SCI to Rx UE C. The RR-SCI sent from Tx UE A to Rx UE C may include a first Tx beam associated with Tx UE A. Tx UE B can receive and decode the RR-SCI sent from Tx UE A. Although the RR-SCI can be sent from Tx UE A to Rx UE C, the RR-SCI can be omnidirectional, so it can be received and decoded at Tx UE B. Tx UE B can receive the RR-SCI and, at least in part, identify the first Tx beam associated with Tx UE A and the sidelink resources associated with Tx UE A based on the RR-SCI. Tx UE B can determine that the Tx beam associated with Tx UE B is different from the first Tx beam associated with Tx UE A. When the Tx beam associated with Tx UE B is different from the Tx beam associated with Tx UE A, Tx UE B can transmit data on the sidelink resources associated with Tx UE A.

[0089] In some cases, Tx UE B can receive RR-SCI from Tx UE A, and Tx UE B can determine the sidelink resources of Tx UE A, but not the Tx beam of Tx UE A. In this case, Tx UE B can assume that the sidelink resources of Tx UE A cannot be used by Tx UE B.

[0090] In some aspects, RR-SCI may include a Tx beam and / or a Tx beam in the opposite direction. For example, RR-SCI transmitted from Tx UE A to Rx UE C may include a third Tx beam associated with Tx UE A. The third Tx beam may be in the opposite direction to the first Tx beam associated with Tx UE A. In other words, the third Tx beam may be associated with a first direction and the first Tx beam may be associated with a second direction opposite to the first direction. RR-SCI may include a third Tx beam associated with Tx UE A to prevent, for example, data transmission between Tx UE E and Rx UE F from interfering with data reception at Rx UE C.

[0091] In some aspects, for cross-beam reservation, SCI-1 in the PSCCH can also be beamformed. Tx UEs (e.g., Tx UE A, Tx UE B, or Tx UE E) can reserve different beams for future data transmissions and / or retransmissions. RR-SCI can reserve resources associated with different beams for the current PSSCH and / or future PSSCHs.

[0092] As indicated above, provide Figure 7 As an example. Other examples can be related to... Figure 7 The descriptions are different.

[0093] Figure 8 This is a diagram illustrating an example 800 of sidelink control signaling with Tx beam indication according to this disclosure.

[0094] In some aspects, omnidirectional RR-SCI in high-frequency bands may not meet the coverage level of beamforming data channels. However, this RR-SCI is expected to be detected by multiple side-link UEs. To improve the coverage level of RR-SCI, low-frequency bands (e.g., 6 GHz) can be used to transmit RR-SCI for both side-links and NR-U side-links. Low-frequency bands can be paired with unlicensed high-frequency bands using carrier aggregation. Low-frequency bands can be used for control signaling (e.g., for transmitting RR-SCI) because they can increase the coverage area compared to high-frequency bands. High-frequency bands can employ carriers to achieve high data throughput.

[0095] like Figure 8 As shown, the first transmission opportunity can occur on sidelink resources associated with a subcarrier in the high-frequency band. TX UE (e.g., Figure 7 Tx UE A and / or Figure 7Tx UE B) can transmit RR-SCI on sidelink resources associated with an anchor carrier in the low-frequency band. The anchor carrier can be a first carrier in the low-frequency band, and the secondary carrier can be a second carrier in the high-frequency band. The first transmission opportunity and RR-SCI transmission can be separated by offset. RR-SCI transmitted on sidelink resources associated with an anchor carrier in the low-frequency band can be cross-carrier reservation. Cross-carrier reservation can indicate one or more sidelink resources associated with a secondary carrier in the high-frequency band. For example, RR-SCI can include cross-carrier reservation indicating two separate sidelink resources associated with a secondary carrier in the high-frequency band. One or more sidelink resources indicated by RR-SCI with cross-carrier reservation may occur later in time than the sidelink resources used to transmit RR-SCI with cross-carrier reservation.

[0096] In some aspects, RR-SCI, including cross-carrier reservation, can indicate an upcoming sidelink resource reservation in another carrier (e.g., a carrier other than the one in which the RR-SCI is transmitted). For example, the RR-SCI can be transmitted in an anchor channel associated with a low-frequency band, while the RR-SCI can be used to reserve upcoming sidelink resources on a subcarrier associated with a high-frequency band. Other UEs (e.g., Figure 7 The Tx UE and Rx UE can monitor the anchor channel associated with the low frequency band to detect RR-SCI with cross-carrier reservation.

[0097] In some aspects, RR-SCI with cross-carrier reservation can be transmitted in an anchor channel associated with a low-frequency band. RR-SCI may include SCI-1 carrying a reservation period. RR-SCI may include SCI-2 with cross-carrier resource reservation. When no data is transmitted with SCI-2, SCI-2 may be transmitted in a shortened PSSCH.

[0098] In SCI-1 and / or SCI-2, an RR-SCI with cross-carrier reservations may include reserved Tx beam indices (or multiple reserved Tx beam indices) for a subcarrier associated with a high-frequency band. In SCI-1 and / or SCI-2, an RR-SCI with cross-carrier reservations may include carrier indices for a subcarrier associated with a high-frequency band. When multiple subcarriers are available, carrier indices for the subcarriers may be included. In SCI-1 and / or SCI-2, an RR-SCI with cross-carrier reservations may include a time slot offset between the RR-SCI and a first transmission in a subcarrier associated with a high-frequency band. The time slot offset may be associated with a subcarrier number.

[0099] In some aspects, due to scheduling constraints, a cross-carrier reserved RR-SCI transmitted in an anchor carrier associated with a low frequency band may be inconsistent with a first transmission in a subcarrier associated with a high frequency band. For example, this scheduling constraint may be due to sensing performed in an anchor carrier associated with a low frequency band.

[0100] As indicated above, provide Figure 8 As an example. Other examples can be related to... Figure 8 The descriptions are different.

[0101] In some cases, multiple Tx UEs and Rx UEs can be configured using a star topology. An Rx UE can establish an Rx beam pointing to a corresponding Tx UE. A Tx UE can be an anchor UE configured to use a Tx beam pointing to a corresponding Rx UE. Tx and Rx beams can be configured for Rx and Tx UEs during the initial beam selection process or during PSSCH beam scanning.

[0102] In some aspects, wide beams can be used to transmit RR-SCI. Data can be transmitted according to resource reservations indicated by the RR-SCI, and narrow beams can also be used to transmit data. The transmission of RR-SCI and the transmission of data at least partially based on RR-SCI can be separated by an X symbol switching gap, where X is a positive integer.

[0103] In some cases, a first Tx UE may use a Tx beam pointing towards a target Rx UE to transmit an RR-SCI (e.g., a beamformed RR-SCI), but the RR-SCI may not be detected by other Tx and / or Rx UEs included in the star topology. A second Tx UE in the direction of the target Rx UE's Rx beam may transmit in the direction of the target Rx UE and use the same sidelink resources as the first Tx UE. The second Tx UE may transmit in the direction of the target Rx UE because the second Tx UE may not detect the RR-SCI transmitted by the first Tx UE.

[0104] Figure 9 This is a diagram illustrating an example 900 of sidelink control signaling with Tx beam indication according to this disclosure.

[0105] like Figure 9As shown, Tx UE A can communicate with Rx UE C. Tx UE A can be the anchor UE, and Rx UE C can be the target UE. Tx UE B can communicate with Rx UE D. Tx UE B can be the anchor UE, and in this example, Tx UE B can be the interference anchor node. Tx / Rx UE E can communicate with Tx / Rx UE F. Tx / Rx UE F can be the anchor UE, and in this example, Tx / Rx UE E can be the interference UE.

[0106] As an example, Tx UE A can send RR-SCI. RR-SCI can be detected by Rx UE C, Rx UE D, and / or Tx / Rx UE F. However, RR-SCI may not be detected by Tx UE B because Tx UE A may send RR-SCI in the opposite direction to Tx UE B. Without detecting RR-SCI sent by Rx UE A, Tx UE B can use the sidelink resources of Tx UE A to send data to Rx UE D. Furthermore, Tx / Rx UE E can be configured to listen for RR-SCI in the direction of Tx / Rx UE F, and Tx / Rx UE E may not detect RR-SCI sent by Tx UE A.

[0107] In some respects, an Rx UE receiving RR-SCI from a Tx UE can relay or forward RR-SCI in the Rx beam direction used to receive RR-SCI.

[0108] exist Figure 9 In the example shown, Rx UE C can receive the RR-SCI sent by Tx UE A, and Rx UE C can relay the RR-SCI in the Rx beam direction used by Rx UE C. Therefore, Tx UE B can receive the relayed RR-SCI from Rx UE C. Tx UE B can determine the sidelink resources of Tx UE A at least in part based on the relayed RR-SCI received from Rx UE C.

[0109] exist Figure 9 In another example shown, Tx / Rx UE F can receive the RR-SCI transmitted by Tx UE A, and Tx / Rx UE F can relay the RR-SCI in the Rx beam direction used by Tx / Rx UE F. Therefore, Tx / Rx UE E can receive the relayed RR-SCI from Tx / Rx UE F. Tx / Rx UE E can determine the sidelink resources of Tx UE A at least in part based on the relayed RR-SCI received from Tx / Rx UE F.

[0110] As indicated above, provide Figure 9 As an example. Other examples can be related to... Figure 9 The descriptions are different.

[0111] Figure 10 This is a diagram illustrating an example 1000 of sidelink control signaling with transmit beam indication according to this disclosure. Figure 10 As shown, Example 1000 includes communication between a first UE (e.g., UE 120a), a second UE (e.g., UE 120e), and a third UE (e.g., UE 120f). In some aspects, the first UE, the second UE, and the third UE may be included in a wireless network such as wireless network 100. The first UE, the second UE, and the third UE may communicate on a wireless sidelink.

[0112] As shown in the attached figure, reference numeral 1002, the third UE ( Figure 9 The Tx UE A) can send to the second UE ( Figure 9 The Rx UE (C) transmits RR-SCI. The second UE can use the Rx beam of the second UE to receive RR-SCI.

[0113] As shown by reference numeral 1004 in the attached figure, the second UE can relay the RR-SCI in the Rx beam direction of the second UE. In other words, the second UE can transmit the relayed RR-SCI in the Rx beam direction of the second UE. The relayed RR-SCI can be transmitted by the first UE ( Figure 9 The Tx signal is received by the UE B. When the direction of the second UE corresponds to the Rx beam direction of the first UE, the first UE can receive the RR-SCI relayed from the second UE.

[0114] In some cases, a third UE may transmit an RR-SCI, but the first UE may not be able to detect the RR-SCI transmitted by the third UE. For example, the third UE may transmit an RR-SCI in a first direction, while the first UE may be in a second direction opposite to the first direction. In this example, when the first UE cannot receive the RR-SCI directly from the third UE, the first UE can receive the relayed RR-SCI from the second UE.

[0115] As shown by reference numeral 1006 in the attached figure, the first UE can determine the sidelink resources of the third UE at least in part based on the relayed RR-SCI. The first UE can determine the Tx beam of the third UE at least in part based on the relayed RR-SCI.

[0116] As shown by reference numeral 1008 in the attached figure, when the Tx beam of the first UE and the Tx beam of the third UE do not overlap spatially, the first UE can perform sidelink transmission on the sidelink resources of the third UE. Alternatively, when the Tx beam of the first UE and the Tx beam of the third UE overlap spatially, the first UE can perform sidelink transmission outside the sidelink resources of the third UE.

[0117] As indicated above, provide Figure 10 As an example. Other examples can be related to... Figure 10 The descriptions are different.

[0118] Figure 11 This is an illustration of example 1100 of sidelink control signaling with transmit beam indication according to this disclosure.

[0119] like Figure 11 As shown, it is possible to access Tx UEs (e.g., on sidelink resources) via sidelink resources. Figure 10 The Tx UE A) sends RR-SCI. It can be sent from the Rx UE (e.g., on sidelink resources). Figure 10 The Rx UE (C) transmits a relayed RR-SCI. The transmission of the RR-SCI and the relayed RR-SCI can be separated by an offset. The relayed RR-SCI can indicate one or more sidelink resources associated with the Tx UE. For example, the relayed RR-SCI can indicate two separate sidelink resources associated with the Tx UE.

[0120] In some aspects, after receiving an RR-SCI from a Tx UE, the Rx UE can relay the RR-SCI in the Rx beam direction associated with the Rx UE (i.e., transmit a relayed RR-SCI). The relayed RR-SCI may include an SCI-1 carrying a reservation period. The relayed RR-SCI may include an SCI-2 with a relayed resource reservation. SCI-2 may include an identifier associated with the Tx UE. SCI-2 may include a timeslot offset between the RR-SCI and the relayed RR-SCI, wherein the relayed RR-SCI may be transmitted at a later time compared to the RR-SCI. The timeslot offset can be adapted to the scheduling delay of the Rx UE. When no data is transmitted with SCI-2, SCI-2 may be transmitted in a shortened PSSCH.

[0121] In some aspects, multiple Rx UEs can decode a relayed RR-SCI to determine the sidelink resources and / or Tx beams associated with a Tx UE. The sidelink resources can be located later in time compared to the relayed RR-SCI. For example, a Tx UE can reserve sidelink resources after slot n+x, where the RR-SCI can be transmitted at slot n, and the maximum scheduling delay of the relayed RR-SCI can be x, where n and x are positive integers. In some aspects, the slot offset between the relayed RR-SCI and the sidelink resources associated with it can allow sufficient time for the relayed RR-SCI to be received and decoded on other UEs.

[0122] As indicated above, provide Figure 11 As an example. Other examples can be related to... Figure 11 The descriptions are different.

[0123] Figure 12 This is a diagram illustrating an example 1200 of sidelink control signaling with transmit beam indication according to this disclosure.

[0124] like Figure 12 As shown, Tx UE A can transmit a first RR-SCI on a first sidelink resource. The first RR-SCI can indicate one or more sidelink resources associated with Tx UE A. Tx UE B can transmit a second RR-SCI on a second sidelink resource. The second RR-SCI can indicate one or more sidelink resources associated with Tx UE B. Tx UE B can transmit the second RR-SCI at a later time compared to the first RR-SCI transmitted by Tx UE A.

[0125] In some aspects, Rx UE C can receive a first RR-SCI from Tx UE A. Rx UE C can relay the first RR-SCI in the Rx beam direction of Rx UE C. The relayed first RR-SCI can indicate one or more sidelink resources associated with Tx UE A. Rx UE D can receive a second RR-SCI from Tx UE B. Rx UE D can relay the second RR-SCI in the Rx beam direction of Rx UE D. The relayed second RR-SCI can indicate one or more sidelink resources associated with Tx UE B. Rx UE D can send the relayed second RR-SCI at a later time compared to the relayed first RR-SCI sent by Rx UE C.

[0126] In some respects, the scheduling delay associated with relayed RR-SCI transmissions may allow other Tx UEs to transmit RR-SCIs, which could potentially lead to conflicts in sidelink resources.

[0127] exist Figure 12 In the example shown, one or more sidelink resources associated with Tx UE A may be consistent with one or more sidelink resources associated with Tx UE B. For example, Tx UE B may send its own RR-SCI before receiving the relayed RR-SCI associated with Tx UE A.

[0128] In some aspects, when a relayed RR-SCI received at a Tx UE (e.g., from Rx UE C) indicates that a previous RR-SCI (e.g., sent by Tx UE A) has occupied at least a portion of sidelink resources, a Tx UE (e.g., Tx UE B) can cancel the overlapping resources. The previous RR-SCI may have been sent earlier than the one sent by the Tx UE. The previous RR-SCI may have sidelink resources that later conflict with the RR-SCI sent by the Tx UE. Based at least in part on the relayed RR-SCI indicating the previous RR-SCI, the Tx UE can determine not to use the overlapping sidelink resources for its data transmission. The decoding delay of the relayed RR-SCI can correspond to the latest time when the Tx UE can determine not to use the overlapping sidelink resources.

[0129] As indicated above, provide Figure 12 As an example. Other examples can be related to... Figure 12 The descriptions are different.

[0130] Figure 13 This is a diagram illustrating an example process 1300 performed, for example, by a first UE according to this disclosure. Example process 1300 is an example in which the first UE (e.g., UE 120) performs operations associated with sidelink control signaling having a transmit beam indication.

[0131] like Figure 13 As shown, in some aspects, process 1300 may include receiving resource reservation sidelink control information (RR-SCI) (block 1310) from the second UE, indicating the transmit beam of the second UE and the sidelink resources of the second UE. For example, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller / processor 280 and / or memory 282) may receive the resource reservation sidelink control information (RR-SCI) indicating the transmit beam of the second UE and the sidelink resources of the second UE from the second UE, as described above.

[0132] In some respects, the first UE can correspond to Figure 6 Tx UE B, and the second UE can correspond to Figure 6 TxUE A.

[0133] like Figure 13 As further shown, in some aspects, process 1300 may include transmitting data on the sidelink resources of the second UE using the transmission beam of the first UE that does not spatially overlap with the transmission beam of the second UE (block 1320). For example, the first UE (e.g., using antenna 252, transmission processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may use the transmission beam of the first UE that does not spatially overlap with the transmission beam of the second UE to transmit data on the sidelink resources of the second UE, as described above.

[0134] Process 1300 may include additional aspects, such as any single aspect or any combination of aspects described below and / or combined with one or more other processes described elsewhere herein.

[0135] In the first aspect, RR-SCI includes an identifier associated with the second UE.

[0136] In the second aspect, either alone or in combination with the first aspect, process 1300 includes resolving RR-SCI based at least in part on periodic sidelink synchronization signal blocks (S-SSBs) received at the first UE.

[0137] In the third aspect, receiving RR-SCI, either alone or in combination with one or more of the first and second aspects, includes receiving RR-SCI from the second UE based at least in part on a scan of the sidelink shared channel performed at the first UE.

[0138] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, process 1300 includes determining that the sidelink resources of the second UE are unavailable when information about the transmission beam of the second UE is unavailable at the first UE.

[0139] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the transmit beam of the second UE is the first transmit beam of the second UE, and RR-SCI indicates the second transmit beam of the second UE, and the first transmit beam of the second UE is associated with a first direction, and the second transmit beam of the second UE is associated with a second direction, which is opposite to the first direction.

[0140] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the RR-SCI is associated with the first carrier, and the RR-SCI includes cross-carrier resource reservation to indicate resource reservation of sidelink resources associated with the second carrier.

[0141] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the first carrier corresponds to a low-frequency band anchor carrier, and the second carrier corresponds to a high-frequency band subcarrier.

[0142] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the cross-carrier resource reservation RR-SCI includes one or more of the following: the transmit beam index associated with the second carrier, the carrier index associated with the second carrier, or the time slot offset between the RR-SCI and the first transmit in the second carrier.

[0143] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the RR-SCI includes an SCI-1 carrying a reserved periodicity, and the RR-SCI includes an SCI-2 having cross-carrier resource reservations.

[0144] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, SCI-2 with cross-carrier resource reservation is received via a shortened sidelink shared channel.

[0145] although Figure 13 Example blocks of process 1300 are shown, but in some respects, process 1300 may include additional blocks, fewer blocks, different blocks, or blocks similar to those in the example block. Figure 13 The different arrangements of blocks depicted in the diagram. Additionally or alternatively, two or more blocks of process 1300 can be executed in parallel.

[0146] Figure 14 This is a diagram illustrating an example process 1400 performed, for example, by a first UE according to this disclosure. Example process 1400 is an example in which the first UE (e.g., UE 120) performs operations associated with sidelink control signaling having a transmit beam indication.

[0147] like Figure 14 As shown, in some aspects, process 1400 may include receiving relayed resource reservation side link control information (RR-SCI) from the second UE (block 1410). For example, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller / processor 280 and / or memory 282) may receive relayed resource reservation side link control information (RR-SCI) from the second UE, as described above.

[0148] like Figure 14 As further shown, in some aspects, process 1400 may include determining the sidelink resources and transmit beam of the third UE at least in part based on the relayed RR-SCI (block 1420). For example, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may determine the sidelink resources and transmit beam of the third UE at least in part based on the relayed RR-SCI, as described above.

[0149] In some respects, the first UE can correspond to Figure 10 Tx UE B, the second UE can correspond to Figure 10 TxUE C, and the third UE can correspond to Figure 10 Tx UE A.

[0150] Process 1400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or combined with one or more other processes described elsewhere herein.

[0151] In the first aspect, receiving a relayed RR-SCI includes receiving a relayed RR-SCI when the direction of the second UE corresponds to the direction of the receiving beam of the first UE.

[0152] In the second aspect, alone or in combination with the first aspect, receiving RR-SCI includes receiving a relayed RR-SCI from a second UE when the first UE is unable to receive the RR-SCI associated with the relayed RR-SCI directly from the third UE.

[0153] In the third aspect, either alone or in combination with one or more of the first and second aspects, the relayed RR-SCI includes an identifier associated with the third UE, and a time slot offset between the RR-SCI and the relayed RR-SCI, which occurs later in time compared to the RR-SCI.

[0154] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the RR-SCI includes an SCI-2 indicating the sidelink resources of the third UE and the transmit beam of the third UE.

[0155] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the sidelink resources of the third UE are associated with the anchor carrier.

[0156] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the sidelink resources of the third UE are later in time compared to the relayed RR-SCI.

[0157] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 1400 includes transmitting an RR-SCI indicating the sidelink resources of the first UE, determining, at least in part, based on an indicator included in the relayed RR-SCI, that the sidelink resources of the third UE indicated in the relayed RR-SCI conflict with the sidelink resources of the first UE, and determining that data will not be transmitted on the sidelink resources of the first UE that conflict with the sidelink resources of the first UE.

[0158] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the relayed RR-SCI is received at a time later than the RR-SCI transmitted from the first UE by a defined offset.

[0159] although Figure 14 Example blocks of process 1400 are shown, but in some respects, process 1400 may include additional blocks, fewer blocks, different blocks, or blocks similar to those in the example block. Figure 14 The blocks are arranged in different ways as depicted in the diagram. Alternatively or concurrently, two or more blocks of process 1400 can be executed in parallel.

[0160] The following provides an overview of some aspects of this disclosure.

[0161] Aspect 1: A wireless communication method performed by a first user equipment (UE), comprising: receiving resource reservation sidelink control information (RR-SCI) from a second UE indicating a transmission beam of the second UE and sidelink resources of the second UE; and transmitting data on the sidelink resources of the second UE using the transmission beam of the first UE that does not spatially overlap with the transmission beam of the second UE.

[0162] Aspect 2: According to the method of aspect 1, wherein the RR-SCI includes an identifier associated with the second UE, and wherein the transmission beam indicated in the RR-SCI is different from the beam that transmits the RR-SCI.

[0163] Aspect 3: The method according to any one of Aspects 1 to 2 further includes: resolving RR-SCI based at least in part on the periodic side link synchronization signal block (S-SSB) received at the first UE.

[0164] Aspect 4: The method according to any one of Aspects 1 to 3, wherein receiving RR-SCI includes: receiving RR-SCI from the second UE based at least in part on a sidelink shared channel scan performed at the first UE.

[0165] Aspect 5: The method according to any one of Aspects 1 to 4 further includes: determining that the side link resources of the second UE are unavailable when information about the transmission beam of the second UE is unavailable at the first UE.

[0166] Aspect 6: The method according to any one of Aspects 1 to 5, wherein the transmit beam of the second UE is the first transmit beam of the second UE, wherein RR-SCI indicates the second transmit beam of the second UE, and wherein the first transmit beam of the second UE is associated with a first direction, and the second transmit beam of the second UE is associated with a second direction, which is opposite to the first direction.

[0167] Aspect 7: The method according to any one of Aspects 1 to 6, wherein the RR-SCI is associated with a first carrier and the RR-SCI includes cross-carrier resource reservation to indicate resource reservation for sidelink resources associated with a second carrier.

[0168] Aspect 8: According to the method of aspect 7, the first carrier corresponds to a low-frequency band anchor carrier and the second carrier corresponds to a high-frequency band subcarrier.

[0169] Aspect 9: According to the method of aspect 7, the cross-carrier resource reservation RR-SCI includes one or more of the following: a transmit beam index associated with the second carrier, a carrier index associated with the second carrier, or a time slot offset between the RR-SCI and the first transmit in the second carrier.

[0170] Aspect 10: According to the method of aspect 7, wherein the RR-SCI includes an SCI-1 carrying reserved periodicity, and the RR-SCI includes an SCI-2 having cross-carrier resource reservation.

[0171] Aspect 11: According to the method of aspect 10, the SCI-2 with cross-carrier resource reservation is received through a shortened side-link shared channel.

[0172] Aspect 12: A wireless communication method performed by a first user equipment (UE), comprising: receiving relayed resource reservation sidelink control information (RR-SCI) from a second UE; and determining, at least in part, a sidelink resource of a third UE and a transmission beam of the third UE based on the relayed RR-SCI.

[0173] Aspect 13: According to the method of aspect 12, receiving the relayed RR-SCI includes: receiving the relayed RR-SCI when the direction of the second UE corresponds to the direction of the receiving beam of the first UE.

[0174] Aspect 14: The method according to any one of Aspects 12 to 13, wherein receiving RR-SCI includes: receiving RR-SCI via relay from a second UE when the first UE is unable to directly receive RR-SCI associated with the relayed RR-SCI from a third UE.

[0175] Aspect 15: The method according to any one of Aspects 12 to 14, wherein the relayed RR-SCI includes: an identifier associated with a third UE; and a time slot offset between the RR-SCI and the relayed RR-SCI, which occurs later in time compared to the RR-SCI.

[0176] Aspect 16: According to the method of aspect 15, wherein the RR-SCI includes an SCI-2 indicating the sidelink resources of the third UE and the transmit beam of the third UE.

[0177] Aspect 17: The method of any one of Aspects 12 to 16, wherein the sidelink resources of the third UE are associated with the anchor carrier.

[0178] Aspect 18: According to the method of any one of Aspects 12 to 17, the sidelink resources of the third UE are later in time compared with the RR-SCI via relay.

[0179] Aspect 19: The method according to aspect 18 further includes: transmitting an RR-SCI indicating the sidelink resources of the first UE; determining, at least in part, based on an indicator included in the relayed RR-SCI, that the sidelink resources of the third UE indicated in the relayed RR-SCI conflict with the sidelink resources of the first UE; and determining not to transmit data on the sidelink resources of the first UE that conflict with the sidelink resources of the first UE.

[0180] Aspect 20: According to the method of aspect 19, the relayed RR-SCI is received later in time by a defined offset compared to the RR-SCI sent from the first UE.

[0181] Aspect 21: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more methods of aspects 1-11.

[0182] Aspect 22: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform one or more methods of aspects 1-11.

[0183] Aspect 23: A device for wireless communication, comprising at least one component for performing one or more methods of aspects 1-11.

[0184] Aspect 24: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform one or more methods of aspects 1-11.

[0185] Aspect 25: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 1-11.

[0186] Aspect 26: An apparatus for wireless communication at a device, comprising a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more methods of aspects 12-20.

[0187] Aspect 27: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the one or more processors being configured to perform one or more methods of aspects 12-20.

[0188] Aspect 28: A device for wireless communication, comprising at least one component for performing one or more methods of aspects 12-20.

[0189] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication, the code including instructions executable by a processor to perform one or more methods of aspects 12-20.

[0190] Aspect 30: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions including one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more methods of aspects 12-20.

[0191] The foregoing disclosure provides illustrations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations can be made based on the foregoing disclosure, or from practice in these aspects.

[0192] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. "Software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, application programs, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, programs and / or functions, and other examples, whether referred to as software, firmware, middleware, microcode, hardware description languages, or otherwise. As used herein, a "processor" is implemented in hardware and / or a combination of hardware and software. It is evident that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit these aspects. Therefore, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, as those skilled in the art will understand that software and hardware can be designed to implement the systems and / or methods, at least in part, based on the descriptions herein.

[0193] As used in this article, depending on the context, "meets the threshold" can mean a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0194] Although specific combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of aspects. Many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. Disclosure of aspects includes combinations of each dependent claim with each other claim in the claim set. As used herein, the phrase “at least one” referring to the list of items means any combination of these items, including single members. As an example, “at least one of a, b, or c” is intended to cover a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination having multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c or any other order of a, b, and c).

[0195] No element, action, or instruction used herein should be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “one” are intended to include one or more items and may be used interchangeably with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items relating to the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, etc.) and may be used interchangeably with “one or more.” If the intention is to use only one item, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “have,” “with,” “possess,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, unless explicitly stated otherwise (e.g., used in conjunction with “or” or “only one”), the term “or” when used in a series is intended to be inclusive and may be used interchangeably with “and / or.”

Claims

1. A first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, are configured to: Receive resource reservation sidelink control information (RR-SCI) from the second UE, which indicates the transmit beam of the second UE and the sidelink resources of the second UE. The RR-SCI is analyzed at least in part based on the periodic sidelink synchronization signal block S-SSB or the periodic beam scan signal received at the first UE; as well as Data is transmitted on the sidelink resources of the second UE using the transmission beam of the first UE that does not spatially overlap with the transmission beam of the second UE.

2. The UE according to claim 1, wherein, The RR-SCI includes an identifier associated with the second UE, and wherein the transmit beam indicated in the RR-SCI is different from the beam that transmits the RR-SCI.

3. The UE according to claim 1, wherein, The one or more processors are configured to: The RR-SCI is received from the second UE at least in part based on a sidelink shared channel scan performed at the first UE.

4. The UE according to claim 1, wherein, The one or more processors are further configured to: When the information regarding the transmit beam of the second UE is unavailable at the first UE, it is determined that the sidelink resources of the second UE are unavailable.

5. The UE according to claim 1, wherein, The transmit beam of the second UE is the first transmit beam of the second UE, wherein the RR-SCI indicates the second transmit beam of the second UE, and wherein the first transmit beam of the second UE is associated with a first direction and the second transmit beam of the second UE is associated with a second direction, wherein the second direction is opposite to the first direction.

6. The UE according to claim 1, wherein, The RR-SCI is associated with the first carrier, and the RR-SCI includes cross-carrier resource reservation to indicate resource reservation for sidelink resources associated with the second carrier.

7. The UE according to claim 6, wherein, The first carrier corresponds to a low-frequency anchor carrier, and the second carrier corresponds to a high-frequency subcarrier.

8. The UE according to claim 6, wherein, The RR-SCI that includes the cross-carrier resource reservation includes one or more of the following: the transmit beam index associated with the second carrier, the carrier index associated with the second carrier, or the time slot offset between the RR-SCI and the first transmit in the second carrier.

9. The UE according to claim 6, wherein, The RR-SCI includes SCI-1 carrying reserved periodicity, and the RR-SCI includes SCI-2 having the cross-carrier resource reservation.

10. The UE according to claim 9, wherein, The SCI-2 with the cross-carrier resource reservation is received via a shortened sidelink shared channel.

11. A method for wireless communication performed by a first user equipment (UE), comprising: Receive resource reservation sidelink control information (RR-SCI) from the second UE, which indicates the transmit beam of the second UE and the sidelink resources of the second UE. The RR-SCI is analyzed at least in part based on the periodic sidelink synchronization signal block S-SSB or the periodic beam scan signal received at the first UE; as well as Data is transmitted on the sidelink resources of the second UE using the transmission beam of the first UE that does not spatially overlap with the transmission beam of the second UE.

12. The method according to claim 11, wherein, Receiving the RR-SCI includes: The RR-SCI is received from the second UE at least in part based on a sidelink shared channel scan performed at the first UE.

13. The method of claim 11, further comprising: When the information regarding the transmit beam of the second UE is unavailable at the first UE, it is determined that the sidelink resources of the second UE are unavailable.

14. The method according to claim 11, wherein, The transmit beam of the second UE is the first transmit beam of the second UE, wherein the RR-SCI indicates the second transmit beam of the second UE, and wherein the first transmit beam of the second UE is associated with a first direction and the second transmit beam of the second UE is associated with a second direction, wherein the second direction is opposite to the first direction.

15. The method according to claim 11, wherein: The RR-SCI is associated with the first carrier, and the RR-SCI includes cross-carrier resource reservation to indicate resource reservation for sidelink resources associated with the second carrier; The first carrier corresponds to a low-frequency band anchor carrier, and the second carrier corresponds to a high-frequency band subcarrier; The RR-SCI that includes the cross-carrier resource reservation includes one or more of the following: the transmit beam index associated with the second carrier, the carrier index associated with the second carrier, or the time slot offset between the RR-SCI and the first transmit in the second carrier; The RR-SCI includes an SCI-1 carrying a reserved periodicity, and the RR-SCI includes an SCI-2 having the cross-carrier resource reservation, and the SCI-2 having the cross-carrier resource reservation is received via a shortened sidelink shared channel; or The RR-SCI includes an identifier associated with the second UE.

16. An apparatus for wireless communication, comprising components for performing the steps of the method as claimed in any one of claims 11-15.

17. A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions executable by a processor to perform the method as claimed in any one of claims 11-15.

Images