Reserved resource indication for sidelink

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may send a reservation of a sidelink resource for communications of the UE, wherein the sidelink resource was previously reserved by a transmitter UE for communications of the transmitter UE; and receive an indication that the sidelink resource is reserved and the UE is not permitted to reserve the sidelink resource. A number of other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 023,508, filed on May 12, 2020, entitled “RESERVED RESOURCE INDICATION FOR SIDELINK,” and U.S. Non-Provisional Patent Application No. 17 / 302,735, filed on May 11, 2021, entitled “RESERVED RESOURCE INDICATION FOR SIDELINK,” which are expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and to techniques and apparatus for indicating reserved resources in sidelink communications. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support 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 set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) that may support communications for multiple user equipment (UEs). A UE may communicate with a BS via a downlink and an uplink. A "downlink" (or "forward link") refers to a communication link from a BS to a UE, while an "uplink" (or "reverse link") refers to a communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, etc.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user devices to communicate at the city, country, region and even global level. NR, which can also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards, which use orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and support beamforming, multiple-input multiple-output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] In some aspects, a wireless communication method performed by a user equipment (UE) may include: sending a reservation for side link resources for communication with the UE, wherein the side link resources were previously reserved by a transmitter UE for communication with the transmitter UE; and receiving an indication that the side link resources are reserved and the UE is not permitted to reserve the side link resources.

[0008] In some aspects, a wireless communication method performed by a UE may include: receiving a reservation for side link resources for communication with the first transmitter UE from a first transmitter UE, wherein the side link resources were previously reserved by a second transmitter UE for communication with the second transmitter UE; and sending an indication that the side link resources are reserved and the first transmitter UE is not permitted to reserve the side link resources.

[0009] In some aspects, a UE for wireless communication may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to send a reservation of a sidelink resource for communication of the UE, wherein the sidelink resource was previously reserved by a transmitter UE for communication of the transmitter UE; and receive an indication that the sidelink resource is reserved and the UE is not permitted to reserve the sidelink resource.

[0010] In some aspects, a UE for wireless communication may include a memory and one or more processors coupled to the memory. The memory and the one or more processors may be configured to receive a reservation of a sidelink resource for communication of the first transmitter UE from a first transmitter UE, wherein the sidelink resource was previously reserved by a second transmitter UE for communication of the second transmitter UE; and send an indication that the sidelink resource is reserved and the first transmitter UE is not permitted to reserve the sidelink resource.

[0011] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to send a reservation of a sidelink resource for communication of the UE, wherein the sidelink resource was previously reserved by a transmitter UE for communication of the transmitter UE; and receive an indication that the sidelink resource is reserved and the UE is not permitted to reserve the sidelink resource.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a UE, the one or more instructions may cause the one or more processors to receive a reservation of a sidelink resource for communication of the first transmitter UE from a first transmitter UE, wherein the sidelink resource was previously reserved by a second transmitter UE for communication of the second transmitter UE; and send an indication that the sidelink resource is reserved and the first transmitter UE is not permitted to reserve the sidelink resource.

[0013] In some aspects, an apparatus for wireless communication may include components for sending a reservation of side link resources for communications to the apparatus, wherein the side link resources were previously reserved by a transmitter apparatus for communications to the transmitter apparatus; and components for receiving an indication that the side link resources are reserved and that the apparatus is not permitted to reserve the side link resources.

[0014] In some aspects, an apparatus for wireless communication may include: a component for receiving a reservation of side link resources for communication of the first transmitter device from a first transmitter device, wherein the side link resources were previously reserved by a second transmitter device for communication of the second transmitter device; and a component for sending that the side link resources are reserved and the first transmitter device is not permitted to reserve the side link resources.

[0015] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as described herein with reference to the drawings and descriptions.

[0016] The features and technical advantages of the examples according to the present disclosure have been outlined quite extensively above in order to better understand the detailed description below. Additional features and advantages will be described below. The disclosed concepts and specific examples can be easily used as the basis for modifying or designing other structures for achieving the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein, their organization and operation methods, and the associated advantages will be better understood from the following description. Each of the accompanying drawings is provided for the purpose of illustration and description and is not provided as a definition of limitations to the claims.

[0017] Although various aspects are described in the present disclosure by way of illustration of some examples, it will be appreciated by those skilled in the art that these aspects can be implemented in a variety of different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip embodiments or other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial instruments, retail / procurement devices, medical devices, or devices supporting artificial intelligence). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. The device incorporating the various aspects and features described may include additional components and features for implementing and practicing the claimed and described aspects. For example, the transmission and reception of wireless signals may include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers). The various aspects described herein are intended to be implemented in devices, components, systems, distributed arrangements, or end-user devices of various sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to be able to understand the above-mentioned features of the present disclosure in detail, reference may be made to various aspects for a more specific description (which has been briefly summarized above), some of which are shown in the accompanying drawings. However, it should be noted that the drawings only show certain typical aspects of the present disclosure and should not be considered as limiting the scope of the present disclosure, as the description may admit of other equally effective aspects. The same reference numerals in different drawings may represent the same or similar elements.

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

[0020] Figure 2 is a diagram showing an example of communication between a base station and a UE in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example of side link communication according to the present disclosure.

[0022] Figure 4 is a diagram showing an example of side link communication and access link communication according to the present disclosure.

[0023] Figure 5 is a diagram illustrating an example of reserved resource indication for sidelink communication according to the present disclosure.

[0024] Figure 6 and Figure 7 is a diagram illustrating an example process performed, for example, by a user device according to the present disclosure. DETAILED DESCRIPTION

[0025] Various aspects of the present disclosure will be described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in a variety of different forms and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. On the contrary, these aspects are provided so that the present disclosure becomes thorough and complete, and fully conveys the scope of the present disclosure to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently or in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method practiced using other structures, functions, or structures and functions in addition to or different from the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of the claims.

[0026] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether these elements are implemented in the form of hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] It should be noted that although various aspects may be described herein using terminology generally associated with 5G or NR radio access technologies (RATs), various aspects of the present disclosure may be applied to other RATs, such as 3G RATs, 4G RATs, and / or post-5G RATs (e.g., 6G RATs).

[0028] Figure 1is a diagram showing an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, etc. The wireless network 100 may include a plurality of base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE), and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0029] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may permit unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may permit unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may permit restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS of macro cell 102a, BS 110b may be a pico BS of pico cell 102b, and BS 110c may be a femto BS of femto cell 102c. A BS may support one or more (e.g., three) cells. Herein, the terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5GNB", and "cell" may be used interchangeably.

[0030] In some aspects, the cell is not necessarily fixed, and the geographical area of ​​the cell can move according to the location of the mobile BS. In some aspects, the BS can be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network, through various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0031] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and send data transmissions to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1In the example shown, relay BS 110d may communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS may also be referred to as a relay station, relay base station, relay, or the like.

[0032] The wireless network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay BS, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a higher transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0033] A network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0034] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be fixed or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can also be a cellular phone (smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or instrument, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio, etc.), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing device, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0035] Some UEs may be considered as 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. A wireless node may provide, for example, a connection to or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included in a housing that houses components of UE 120 (e.g., processor components and / or memory components). In some aspects, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0036] Generally, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific RAT and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, channel, etc. Each frequency can support a single RAT within a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0037] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (e.g., without using base station 110 as an intermediary for communicating with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol or vehicle-to-infrastructure (V2I) protocol) and / or mesh network. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations performed by base station 110 as described elsewhere herein.

[0038] The devices of the wireless network 100 can communicate using an electromagnetic spectrum, which can be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 can communicate using an operating frequency band having a first frequency range (FR1) from 410 MHz to 7.125 GHz, and / or can communicate using an operating frequency band having a second frequency range (FR2) from 24.25 GHz to 52.6 GHz. The frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although part of FR1 is above 6 GHz, FR1 is often referred to as a "sub-6 GHz (below 6 GHz)" frequency band. Similarly, FR2 is also often referred to as a "millimeter wave" frequency band, although it is different from the extremely high frequency (EHF) frequency band (30 GHz-300 GHz) determined as a "millimeter wave" frequency band by the International Telecommunication Union (ITU). Therefore, unless otherwise stated, it should be understood that if used in this article, the term "sub-6 GHz" or the like can broadly represent frequencies below 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., above 7.125 GHz). Similarly, unless otherwise stated, it should be understood that the term "millimeter wave" and the like, if used herein, can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or mid-band frequencies (e.g., below 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0039] As mentioned above, Figure 1 is provided as an example. Other examples can be found in the reference Figure 1 The content described is different.

[0040] Figure 2 2 is a diagram illustrating an example 200 of base station 110 communicating with UE 120 in wireless network 100 according to the present disclosure. Base station 110 may be equipped with T antennas 234a through 234t and UE 120 may be equipped with R antennas 252a through 252r, where in general, T≥1 and R≥1.

[0041] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may also 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 signals (PSS) or secondary synchronization signals (SSS)). If applicable, a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and may provide T output symbol streams to T modulators (MOD) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may also process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.

[0042] At the UE 120, antennas 252a to 252r may receive downlink signals from the base station 110 and / or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may also process the input samples (e.g., for OFDM) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a channel quality indicator (CQI) parameter, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284.

[0043] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0044] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or may be included in one or more antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include a set of coplanar antenna elements and / or a set of non-coplanar antenna elements. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as Figure 2 One or more antenna elements of one or more components).

[0045] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may also generate reference symbols for one or more reference signals. If applicable, the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, further processed by modulators 254a through 254r (e.g., for DFT-s-FDM or CP-OFDM), and transmitted to the base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of the UE 120 may be included in a modem of the UE 120. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. A processor (e.g., controller / processor 280) and memory 282 may use the transceiver to perform aspects of any of the methods described herein (e.g., as described in reference to Figure 5-Figure 7 described).

[0046] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 if applicable, and further processed by the receive processor 238 to obtain decoded data and control information sent by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 for scheduling the UE 120 for downlink and / or uplink communications. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 232) of the base station 110 may be included in a modem of the base station 110. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. A processor (e.g., controller / processor 240) and memory 242 may use the transceiver to perform aspects of any of the methods described herein (e.g., as described in reference to Figure 5-Figure 7 described).

[0047] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components of the UE 120 may perform one or more techniques associated with the content described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the can perform or direct e.g. Figure 6 The process of 600 Figure 7 The operations of process 700 and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly executed or executed after compilation, conversion and / or interpretation), the one or more instructions may cause one or more processors, UE 120 and / or base station 110 to perform or direct, for example, Figure 6 The process of 600 Figure 7 The process 700 and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0048] In some aspects, UE 120 may include means for sending a reservation of a sidelink resource for communication with the UE, wherein the sidelink resource was previously reserved by the transmitter UE for communication with other UEs; means for receiving an indication that the sidelink resource is reserved and the UE is not permitted to reserve the sidelink resource, etc. In some aspects, these means may include a combination of Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0049] In some aspects, UE 120 may include means for receiving, from a first transmitter UE, a reservation of a sidelink resource for communication by the first transmitter UE, wherein the sidelink resource was previously reserved by a second transmitter UE for communication by the second transmitter UE; means for sending that the sidelink resource is reserved and the first transmitter UE is not permitted to reserve the sidelink resource, etc. In some aspects, these means may include combining Figure 2One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, etc.

[0050] although Figure 2 The blocks in the 200 and 210 are shown as distinct components, but the functionality described above with reference to the various blocks may be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functionality described with reference to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0051] As mentioned above, Figure 2 is provided as an example. Other examples can be found in the reference Figure 2 The content described is different.

[0052] Figure 3 is a diagram illustrating a sidelink communication example 300 according to the present disclosure.

[0053] 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 side link channels 310. UE 305-1 and 305-2 can communicate using one or more side link channels 310 to perform P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication and / or V2P communication) and / or mesh networking. In some aspects, UE 305 (e.g., UE 305-1 and / or UE 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more side link channels 310 can use a PC5 interface and / or can operate in a high frequency band (e.g., a 5.9 GHz band). Additionally or alternatively, UE 305 can use a global navigation satellite system (GNSS) timing to synchronize the timing of a transmission time interval (TTI) (e.g., a frame, a subframe, a time slot, or a symbol).

[0054] like Figure 3As further shown, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and / or a physical sidelink feedback channel (PSFCH) 325. The PSCCH 315 may be used to transmit control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communication with the base station 110 via an access link or access channel. The PSSCH 320 may be used to transmit data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communication with the base station 110 via an access link or access channel. For example, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) in which a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to transmit sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (eg, acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0055] In some aspects, one or more side link channels 310 may use a resource pool. For example, a scheduling allocation (e.g., included in SCI 330) may be transmitted in a subchannel across time using a specific resource block (RB). In some aspects, a data transmission associated with a scheduling allocation (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling allocation (e.g., using frequency division multiplexing). In some aspects, the scheduling allocation and the associated data transmission are not transmitted on adjacent RBs. In some aspects, a resource pool may be configured to have a plurality of RBs that are not a multiple of a domain frequency reservation unit (e.g., a subchannel). These RBs may be unused spare RBs.

[0056] In some aspects, the UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by the UE 305 (e.g., rather than the base station 110). Resource allocation may be based on reservations. In some aspects, frequency domain resource allocation may be in units of subchannels. In some aspects, resource reservations in the time domain may be in units of time slots. For example, a UE may reserve one or more subchannels using an SCI. An SCI transmission may reserve resources in the current time slot (the time slot in which the SCI is transmitted) and / or up to two future time slots.

[0057] In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmissions. For example, the UE 305 may measure received signal strength indicator (RSSI) parameters associated with various sidelink channels (e.g., sidelink-RSSI (S-RSSI) parameters), may measure reference signal received power (RSRP) parameters associated with various sidelink channels (e.g., PSSCH-RSRP parameters), and / or may measure reference signal received quality (RSRQ) parameters associated with various sidelink channels (e.g., PSSCH-RSRQ parameters), and may select a transmission channel for sidelink communication based at least in part on these parameters.

[0058] Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling using the SCI 330 received in the PSCCH 315, which may indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining channel occupancy rates (CBRs) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 may use for a particular set of subframes).

[0059] In a transmission mode in which resource selection and / or scheduling is performed by the UE 305, the UE 305 may generate a sidelink grant and may send the grant in the SCI 330. For example, the sidelink grant may indicate one or more parameters (e.g., transmission parameters) to be used for an upcoming sidelink transmission, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transmission on the PSSCH 320, one or more subframes to be used for the upcoming sidelink transmission, and / or a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission. In some aspects, the UE 305 may generate a sidelink grant that indicates one or more parameters of a semi-persistent scheduling (SPS), such as a periodicity of the sidelink transmission. Additionally or alternatively, the UE 305 may generate a sidelink grant for event-driven scheduling (e.g., for an on-demand sidelink message).

[0060] As mentioned above, Figure 3 is provided as an example. Other examples can be found in the reference Figure 3 The content described is different.

[0061] Figure 4 is a diagram illustrating an example 400 of side link communications and access link communications according to the present disclosure.

[0062] like Figure 4As 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 in conjunction with Figure 3 As further shown, in some sidelink modes, the base station 110 can communicate with the Tx / Rx UE 405 via a first access link. Additionally or alternatively, in some sidelink modes, the base station 110 can communicate with the Rx / Tx UE 410 via a second access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 can correspond to one or more UEs described elsewhere herein, such as Figure 1 120. Therefore, the direct link between the UE 120 (e.g., via the PC5 interface) may be referred to as a side link, and the direct link between the base station 110 and the UE 120 (e.g., via the Uu interface) may be referred to as an access link. Side link communications may be transmitted via the side link, and access link communications may be transmitted via the access link. Access link communications may be downlink communications (from the base station 110 to the UE 120) or uplink communications (from the UE 120 to the base station 110).

[0063] As mentioned above, Figure 4 is provided as an example. Other examples can be found in the reference Figure 4 The content described is different.

[0064] Sidelink transmissions (interchangeably referred to herein as "communications") may have associated priorities. In some cases, a UE with a communication having a higher priority or the same priority as another UE's communication may preempt the resource reservation of another UE. For example, a first transmitter UE may reserve sidelink resources for a communication having a first priority. A transmitter UE is a UE that sends communications, plans to send communications, is capable of sending communications, and the like. A second transmitter UE may reserve the same sidelink resources for a communication having a second priority. If the second priority is higher than or equal to the first priority, the communication of the second transmitter UE may preempt the communication of the first UE, in which case the second transmitter UE may use the reserved resources for transmission, while the first transmitter UE does not use the resources for transmission. The concept of preemption may facilitate the transmission of higher priority transmissions when multiple UEs compete for the same resources.

[0065] In some cases, a UE with a lower priority communication may inappropriately preempt the communication of a transmitter UE with a higher priority communication. This may occur because the preempting UE is unaware of the resource reservation of the transmitter UE. In some cases, the UE may miss the resource reservation of the transmitter UE due to half-duplex operation, prioritization within the UE, failure to decode the SCI, etc. In some cases, the UE may fail to decode the SCI due to a variety of reasons (including, for example, noise, interference, multiple SCI instances in the PSCCH opportunity, too far from the transmitter, etc.). In some cases, the UE may inappropriately preempt the communication due to decoding the SCI reserving the same resource and making a preemption decision based on the lower priority associated with the reservation rather than the higher priority associated with another reservation of the resource. Resource conflicts and inappropriate communication preemption may limit the performance of sidelink communications.

[0066] Various aspects of the techniques and apparatus described herein help reduce inappropriate preemption by notifying a UE that a sidelink resource has been reserved and that the UE's preemption of the resource is inappropriate. In some aspects, a transmitter UE may send a reservation for a sidelink resource previously reserved by another transmitter UE for another communication. The transmitter UE may receive an indication that the sidelink resource is reserved and that the UE is not permitted to reserve the sidelink resource.

[0067] In some aspects, the indication may be sent by the transmitter UE that first reserved the resource, the receiver UE to receive the communication from the UE, the receiver UE to receive the communication from the transmitter UE, another UE, a base station, etc. In this way, the transmitter UE may be notified before inappropriately preempting another communication. The transmitter UE may reserve another resource, send its communication on another resource, cancel the communication, etc. In some aspects, unused spare RBs (e.g., for feedback) from a resource pool may be used to provide notifications, thereby helping to avoid inappropriate preemption without increasing signaling overhead and traffic on available side link resources.

[0068] Figure 5 is a diagram illustrating an example 500 of a reserved resource indication for sidelink communication according to the present disclosure. As shown, a transmitter UE A 120, a receiver UE A 120, a transmitter UE B 120, and a receiver UE B 120 may communicate with each other using sidelink communication. In some aspects, the receiver UE A 120 may be a UE that is to receive communication from the transmitter UE A 120 (also interchangeably referred to as an "intended receiver" of communication from the transmitter UE A 120), and the receiver UE B 120 may be a UE that is to receive communication from the transmitter UE B 120 (also interchangeably referred to as an "intended receiver" of transmissions from the transmitter UE B 120).

[0069] As indicated by reference numeral 505, the transmitter UE A 120 may transmit a reservation of the side link resources 510 for communication, thereby reserving the side link resources 510. In some aspects, the side link resources 510 may include frequency domain resources (e.g., one or more subchannels, etc.), time domain resources (e.g., one or more time slots, etc.), etc. In some aspects, the transmitter UE A 120 may reserve the side link resources by indicating the resource reservation in the SCI transmitted using the previously reserved resources 515.

[0070] As shown at 520, the transmitter UE B 120 may send a reservation of the sidelink resources 510 to be used for communication. The communication may include a unicast transmission, a broadcast transmission, a multicast transmission, etc. In some aspects, the transmitter UE B 120 may send the reservation using SCI in the previously reserved sidelink resources 525.

[0071] As shown by reference numeral 530, transmitter UE B 120 may receive an indication that side link resources 510 are reserved and transmitter UE B 120 is not permitted to reserve side link resources 510. In some aspects, the indication may be referred to as a conflict indication. The indication may be sent to transmitter UE B 120 based at least in part on a determination that transmitter UE B 120 is not permitted to preempt communications of transmitter UE A 120. In some aspects, the determination may be based at least in part on a priority of communications of transmitter UE A 120, transmitter UE B 120, etc. In some aspects, the communication priority of transmitter UE A 120 may be higher than or equal to the communication priority of transmitter UE B 120.

[0072] In some aspects, the indication may be sent by receiver UE A 120, receiver UE B 120, etc. In some aspects, the indication may be sent by transmitter UE A 120. In some aspects, the indication may be sent by a base station (e.g., Figure 1 In some aspects, the transmitter UE B 120 may send a message to the base station indicating that the transmitter UE B 120 is not permitted to reserve the side link resource. In some aspects, the transmitter UE B 120 may send an indication to the base station indicating that the transmitter UE B 120 receives an indication that the side link resource 510 is reserved and that the transmitter UE B 120 is not permitted to reserve the side link resource 510.

[0073] In some aspects, based at least in part on receiving the indication, the transmitter UE B 120 can cancel the communication. In some aspects, the transmitter UE B 120 can use different side link resources to send the communication. Different side link resources can be side link resources different from side link resources 510, and the transmitter UE B 120 can use different side link resources instead of side link resources 510 to send the communication. In some aspects, different side link resources can be selected by the transmitter UE B 120, allocated by the base station, etc. In some aspects, the transmitter UE B 120 can reserve another side link resource 535 for sending the communication. As shown in the figure, another side link resource 535 can have a position different from the side link resource 510 in the time domain and / or frequency domain.

[0074] In some aspects, the indication that the side link resources 510 are reserved and the transmitter UE B 120 is not allowed to reserve the side link resources 510 may not identify the transmitter UE A 120. In some aspects, the indication may be carried in a broadcast transmission. The indication may be carried on a dedicated physical channel. In some aspects, the dedicated physical channel may be a sequence-based physical channel. In some aspects, the indication may be carried on the PSCCH. In some aspects, the indication may be carried in the SCI on the PSCCH. In some aspects, the SCI may include a first phase (phase 1) SCI (SCI-1) transmission. The indication may be explicitly indicated in the SCI-1 transmission. In some aspects, the indication may be carried in a dedicated second phase (phase 2) SCI format (SCI-2) transmission. In some aspects, the indication may be implied by an additional reservation (re-reservation) of the side link resources 510 for the communication of the transmitter UE A 120. This indication may be implied based at least in part on the communication of sender UE A 120 having a higher priority than the communication of sender UE B 120 .

[0075] In some aspects, the indication may be carried in a media access control (MAC)-control element (CE). In some aspects, the indication may include a signaling sequence similar to a sequence for sending PSFCH feedback. In some aspects, the indication may include a sequence carried on a single frequency network (SFN) resource. In some aspects, the indication may include a PSFCH sequence, wherein the SFN includes the PSFCH. For example, in some aspects, a single resource may be used to carry the indication. A single resource may include a PSFCH resource. In some aspects, one or more PSFCH resources may be used to carry the indication. One or more PSFCH resources may be unused PSFCH resources (e.g., not used for feedback). In some aspects, the indication may include a sequence generated and based at least in part on a source identifier of the UE. In some aspects, the indication may include a sequence sent at least in part based on a source identifier of the UE. In some aspects, one or more standby physical RBs from a sidelink resource pool may be used to carry the indication.

[0076] Various aspects of the above techniques help reduce inappropriate preemption by notifying the UE that a side link resource has been reserved and that the UE's preemption of the resource is inappropriate. In this way, the sender UE can be notified before inappropriately preempting another communication. The sender UE can reserve another resource, send its communication on another resource, cancel the communication, etc. In some aspects, unused spare RBs from a resource pool can be used to provide this notification, thereby helping to avoid inappropriate preemption without increasing signaling overhead and traffic on the available side link resources.

[0077] As mentioned above, Figure 5 is provided as an example. Other examples can be found in the reference Figure 5 The content described is different.

[0078] Figure 6 6 is a diagram illustrating an example process 600 performed, for example, by a UE in accordance with the present disclosure. Example process 600 is an example of a UE (eg, UE 120) performing operations associated with reserved resource indication for a sidelink.

[0079] like Figure 6 As shown, in some aspects, process 600 may include sending a reservation of sidelink resources for communication of the UE, wherein the sidelink resources were previously reserved by a transmitter UE for communication of the transmitter UE (block 610). For example, as described above, the UE (e.g., using transmit processor 264, controller / processor 280, memory 282, etc.) may send a reservation of sidelink resources for communication of the UE. In some aspects, the sidelink resources were previously reserved by a transmitter UE for communication of the transmitter UE.

[0080] like Figure 6 As further shown in FIG. 6 , in some aspects, process 600 may include receiving an indication that sidelink resources are reserved and the UE is not permitted to reserve sidelink resources (block 620). For example, as described above, the UE (e.g., using receive processor 258, controller / processor 280, memory 282, etc.) may receive an indication that sidelink resources are reserved and the UE is not permitted to reserve sidelink resources.

[0081] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or be combined with one or more other processes described elsewhere herein.

[0082] In a first aspect, receiving an indication includes receiving an indication based at least in part on a determination that the UE is not permitted to preempt communications of a sender UE.

[0083] In a second aspect, alone or in combination with the first aspect, the indication is received from a sender UE.

[0084] In a third aspect, alone or in combination with the first aspect, the indication is received from a receiver UE, wherein the receiver UE comprises an intended receiver of communications of a UE, an intended receiver of communications of a sender UE, or a combination thereof.

[0085] In a fourth aspect, alone or in combination with the first aspect, the indication is received from a base station.

[0086] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, process 600 includes sending a message to a base station indicating that the UE is not permitted to reserve sidelink resources.

[0087] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, the determination that the UE is not permitted to preempt the communication of the sender UE is based at least in part on a priority of the communication of the sender UE.

[0088] In a seventh aspect, alone or in combination with the sixth aspect, the communication priority of the transmitter UE is higher than or equal to the communication priority of the UE.

[0089] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the transmitter UE reserves sidelink resources using the sidelink control information.

[0090] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, process 600 includes canceling communications of the UE based at least in part on receiving the indication.

[0091] In a tenth aspect, either alone or in combination with one or more of the first to eighth aspects, process 600 includes sending communications of the UE using different sidelink resources instead of the sidelink resources based at least in part on receiving an indication.

[0092] In an eleventh aspect, alone or in combination with the tenth aspect, different side link resources are allocated by a base station.

[0093] In a twelfth aspect, alone or in combination with the tenth aspect, different sidelink resources are selected by the UE.

[0094] In a thirteenth aspect, alone or in combination with the tenth aspect, process 600 includes reserving different sidelink resources selected by the UE.

[0095] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the communication of the UE includes unicast transmission, broadcast transmission or multicast transmission.

[0096] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, it is indicated that a transmitter UE is not identified.

[0097] In a sixteenth aspect, either alone or in combination with one or more of the first to fifteenth aspects, an indication is carried in a broadcast transmission.

[0098] In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, the indication is carried on a dedicated physical channel.

[0099] In an eighteenth aspect, alone or in combination with the seventeenth aspect, the dedicated physical channel is a sequence-based physical channel.

[0100] In a nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, an indication is carried on a PSCCH.

[0101] In a twentieth aspect, alone or in combination with the nineteenth aspect, an indication is carried in an SCI on a PSCCH.

[0102] In a twenty-first aspect, alone or in combination with the twentieth aspect, the SCI comprises a first stage SCI transmission.

[0103] In a twenty-second aspect, either alone or in combination with the twenty-first aspect, the indication is explicitly indicated using at least one bit in the first phase SCI transmission.

[0104] In aspect twenty-third, either alone or in combination with one or more of aspects one to twenty-second, the indication is implied by an additional reservation by the transmitter UE of side link resources for communication of the transmitter UE, wherein the additional reservation indicates that the priority of communication of the transmitter UE is higher than the priority of communication of the UE.

[0105] In the twenty-fourth aspect, alone or in combination with one or more of the first to twenty-third aspects, an indication is carried in a MAC-CE.

[0106] In the twenty-fifth aspect, alone or in combination with one or more of the first to twenty-third aspects, the indication is carried in a dedicated second stage sidelink control information format.

[0107] In a twenty-sixth aspect, alone or in combination with one or more of the first to twenty-fifth aspects, the indication comprises a sequence.

[0108] In a twenty-seventh aspect, alone or in combination with one or more of the first to twenty-sixth aspects, the indication includes a sequence identical to a PSFCH sequence.

[0109] In a twenty-eighth aspect, alone or in combination with one or more of the first to twenty-seventh aspects, the indication includes a sequence generated at least in part based on a source identifier of the UE.

[0110] In a twenty-ninth aspect, alone or in combination with one or more of the first to twenty-eighth aspects, the indication includes a sequence sent based at least in part on a source identifier of the UE.

[0111] In a thirtieth aspect, alone or in combination with one or more of the first to twenty-ninth aspects, the indication includes a sequence carried on a single resource.

[0112] In the thirty-first aspect, alone or in combination with the thirtieth aspect, the single resource includes a PSFCH resource.

[0113] In aspect 32, either alone or in combination with one or more of aspects 1 to 31, the indication is carried using one or more PSFCH resources.

[0114] In a thirty-third aspect, either alone or in combination with the thirty-second aspect, one or more PSFCH resources are not used for feedback.

[0115] In a thirty-fourth aspect, either alone or in combination with one or more of the first to thirty-third aspects, the indication is carried using one or more spare PRBs in a side link resource pool.

[0116] although Figure 6 An example block diagram of process 600 is shown, but in some aspects, process 600 may include more Figure 6 More blocks, fewer blocks, different blocks, or a different arrangement of blocks than those shown in . Additionally or alternatively, two or more blocks of process 600 may be performed in parallel.

[0117] Figure 7 7 is a diagram illustrating an example process 700 performed, for example, by a UE in accordance with the present disclosure. Example process 700 is an example of a UE (eg, UE 120) performing operations associated with reserved resource indication for a sidelink.

[0118] like Figure 7 As shown, in some aspects, process 700 may include receiving from a first transmitter UE a reservation of sidelink resources for communication of the first transmitter UE, wherein the sidelink resources were previously reserved by a second transmitter UE for communication of the second transmitter UE (block 710). For example, as described above, the UE (e.g., using the receive processor 258, the controller / processor 280, the memory 282, etc.) may receive from the first transmitter UE a reservation of sidelink resources for communication of the first transmitter UE. In some aspects, the sidelink resources were previously reserved by the second transmitter UE for communication of the second transmitter UE.

[0119] like Figure 7 As further shown in FIG. 7 , in some aspects, process 700 may include sending an indication that the sidelink resource is reserved and the first transmitter UE is not permitted to reserve the sidelink resource (block 720). For example, as described above, the UE (e.g., using transmit processor 264, controller / processor 280, memory 282, etc.) may send an indication that the sidelink resource is reserved and the first transmitter UE is not permitted to reserve the sidelink resource.

[0120] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below, and / or be combined with one or more other processes described elsewhere herein.

[0121] In a first aspect, sending the indication includes sending the indication based at least in part on a determination that the first transmitter UE is not permitted to preempt communications of the second transmitter UE.

[0122] In a second aspect, alone or in combination with the first aspect, the UE comprises a second transmitter UE.

[0123] In a third aspect, alone or in combination with the first aspect, the UE comprises a receiver UE, wherein the receiver UE comprises an intended receiver of communications of the first transmitter UE, an intended receiver of communications of the second transmitter UE, or a combination thereof.

[0124] In a fourth aspect, alone or in combination with one or more of the first to third aspects, process 700 includes sending a message to a base station indicating that the first transmitter UE is not permitted to reserve sidelink resources.

[0125] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, the determination that the first transmitter UE is not permitted to preempt the communication of the second transmitter UE is based at least in part on the priority of the communication of the second transmitter UE.

[0126] In a sixth aspect, alone or in combination with the fifth aspect, the communication priority of the second transmitter UE is higher than or equal to the communication priority of the first transmitter UE.

[0127] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the second transmitter UE reserves sidelink resources using the SCI.

[0128] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, communication of the first transmitter UE is cancelled based at least in part on the indication.

[0129] In a ninth aspect, either alone or in combination with one or more of the first to seventh aspects, the communication of the first transmitter UE is transmitted at least in part based on the indication, using a different sidelink resource instead of the sidelink resource.

[0130] In a tenth aspect, alone or in combination with the ninth aspect, different side link resources are allocated by a base station.

[0131] In an eleventh aspect, alone or in combination with the tenth aspect, different sidelink resources are selected by the first transmitter UE.

[0132] In a twelfth aspect, alone or in combination with the ninth aspect, different sidelink resources are reserved by the first transmitter UE based at least in part on the indication.

[0133] In a thirteenth aspect, alone or in combination with one or more of the first to twelfth aspects, the communication of the first transmitter UE includes unicast transmission, broadcast transmission or multicast transmission.

[0134] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the indication does not identify the second transmitter UE.

[0135] In a fifteenth aspect, either alone or in combination with one or more of the first to fourteenth aspects, an indication is carried in a broadcast transmission.

[0136] In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the indication is carried on a dedicated physical channel.

[0137] In a seventeenth aspect, alone or in combination with the sixteenth aspect, the dedicated physical channel is a sequence-based physical channel.

[0138] In the eighteenth aspect, alone or in combination with one or more of the first to seventeenth aspects, an indication is carried on the PSCCH.

[0139] In a nineteenth aspect, alone or in combination with the eighteenth aspect, the indication is carried in the SCI on the PSCCH.

[0140] In a twentieth aspect, alone or in combination with the nineteenth aspect, the SCI comprises a first stage SCI transmission.

[0141] In a twenty-first aspect, alone or in combination with the twentieth aspect, the indication is explicitly indicated using at least one bit in the first stage SCI transmission.

[0142] In aspect 22, either alone or in combination with one or more of aspects 1 to 21, the UE includes a second transmitter UE, and wherein the indication includes an additional reservation of side link resources for communication with the second transmitter UE, wherein the priority of communication with the second transmitter UE is higher than the priority of communication with the first transmitter UE.

[0143] In the twenty-third aspect, alone or in combination with one or more of the first to twenty-second aspects, an indication is carried in a MAC-CE.

[0144] In the twenty-fourth aspect, alone or in combination with one or more of the first to twenty-second aspects, the indication is carried in a dedicated second stage sidelink control information format.

[0145] In a twenty-fifth aspect, alone or in combination with one or more of the first to twenty-fourth aspects, the indication comprises a sequence.

[0146] In a twenty-sixth aspect, alone or in combination with one or more of the first to twenty-fifth aspects, the indication includes a sequence identical to a PSFCH sequence.

[0147] In a twenty-seventh aspect, alone or in combination with one or more of the first to twenty-sixth aspects, the indication comprises a sequence generated at least in part based on a source identifier of the first transmitter UE.

[0148] In a twenty-eighth aspect, alone or in combination with one or more of the first to twenty-seventh aspects, the indication comprises a sequence transmitted based at least in part on a source identifier of the first transmitter UE.

[0149] In a twenty-ninth aspect, alone or in combination with one or more of the first to twenty-eighth aspects, the indication includes a sequence carried on a single resource.

[0150] In a thirtieth aspect, alone or in combination with the twenty-ninth aspect, the single resource comprises a PSFCH resource.

[0151] In the thirty-first aspect, alone or in combination with one or more of the first to thirtieth aspects, the indication is carried using one or more PSFCH resources.

[0152] In the thirty-second aspect, either alone or in combination with the thirty-first aspect, one or more PSFCH resources are not used for feedback.

[0153] In a thirty-third aspect, either alone or in combination with one or more of aspects 1 to 32, the indication is carried using one or more spare PRBs in a side link resource pool.

[0154] although Figure 7 Example blocks of process 700 are shown, but in some aspects, process 700 may include more Figure 7 The blocks depicted in the process 700 may be more blocks, fewer blocks, different blocks, or blocks in a different arrangement. Additionally or alternatively, two or more of the blocks in the process 700 may be executed in parallel.

[0155] The following summarizes some aspects of the disclosure:

[0156] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: sending a reservation for a side link resource for communication with the UE, wherein the side link resource was previously reserved by a transmitter UE for communication with the transmitter UE; and receiving an indication that the side link resource is reserved and the UE is not permitted to reserve the side link resource.

[0157] Aspect 2: The method of aspect 1, wherein receiving the indication comprises receiving the indication based at least in part on a determination that the UE is not permitted to preempt communications of the sender UE.

[0158] Aspect 3: The method according to aspect 1 or 2, wherein the indication is received from a transmitter UE.

[0159] Aspect 4: The method according to aspect 1 or 2, wherein the indication is received from a receiver UE, wherein the receiver UE comprises: an intended receiver of the communication of the UE, an intended receiver of the communication of the sender UE, or a combination thereof.

[0160] Aspect 5: The method according to aspect 1 or 2, wherein the indication is received from a base station.

[0161] Aspect 6: The method according to any one of aspects 1-5 further comprises sending a message to the base station indicating that the UE is not permitted to reserve the sidelink resource.

[0162] Aspect 7: The method according to any of aspects 1-6, wherein the determination that the UE is not permitted to preempt the communication of the sender UE is based at least in part on the priority of the communication of the sender UE.

[0163] Aspect 8: The method according to aspect 7, wherein the priority of the communication of the sender UE is higher than or equal to the priority of the communication of the UE.

[0164] Aspect 9: The method according to any one of aspects 1-8, wherein the transmitter UE reserves the sidelink resources using the sidelink control information.

[0165] Aspect 10: The method according to any one of aspects 1-9, further comprising canceling the communication of the UE based at least in part on receiving the indication.

[0166] Aspect 11: The method according to any one of aspects 1-9 further comprises sending the communication of the UE using a different sidelink resource instead of the sidelink resource based at least in part on receiving the indication.

[0167] Aspect 12: The method according to Aspect 11, wherein the different side link resources are allocated by the base station.

[0168] Aspect 13: According to the method of Aspect 11, the different side link resources are selected by the UE.

[0169] Aspect 14: The method according to Aspect 13 further includes reserving different side link resources selected by the UE.

[0170] Aspect 15: The method according to any one of aspects 1-14, wherein the communication of the UE includes: unicast transmission, broadcast transmission or multicast transmission.

[0171] Aspect 16: The method according to any one of aspects 1-15, wherein the indication does not identify the sender UE.

[0172] Aspect 17: The method according to any one of aspects 1-16, wherein the indication is carried in a broadcast transmission.

[0173] Aspect 18: The method according to any one of aspects 1-17, wherein the indication is carried on a dedicated physical channel.

[0174] Aspect 19: The method according to Aspect 18, wherein the dedicated physical channel is a sequence-based physical channel.

[0175] Aspect 20: The method according to any one of aspects 1-19, wherein the indication is carried on a physical sidelink control channel (PSCCH).

[0176] Aspect 21: The method according to Aspect 20, wherein the indication is carried in Sidelink Control Information (SCI) on the PSCCH.

[0177] Aspect 22: The method according to Aspect 21, wherein the SCI comprises a phase 1 SCI (SCI-1) transmission.

[0178] Aspect 23: The method according to Aspect 22, wherein the indication is explicitly indicated using at least one bit in the SCI-1 transmission.

[0179] Aspect 24: A method according to any one of Aspects 1-23, wherein the indication is implied by an additional reservation by the transmitter UE of sidelink resources for communication of the transmitter UE, wherein the additional reservation indicates that the priority of the communication of the transmitter UE is higher than the priority of the communication of the UE.

[0180] Aspect 25: The method according to any one of aspects 1-24, wherein the indication is carried in a medium access control (MAC) control element.

[0181] Aspect 26: The method according to any one of aspects 1-24, wherein the indication is carried in a dedicated phase 2 sidelink control information format.

[0182] Aspect 27: A method according to any one of aspects 1-26, wherein the indication comprises a sequence.

[0183] Aspect 28: The method according to any one of aspects 1-27, wherein the indication comprises a sequence identical to a physical sidelink feedback channel sequence.

[0184] Aspect 29: The method according to any one of aspects 1-28, wherein the indication comprises a sequence generated based at least in part on a source identifier of the UE.

[0185] Aspect 30: The method according to any one of aspects 1-29, wherein the indication comprises a sequence sent based at least in part on a source identifier of the UE.

[0186] Aspect 31: The method according to any one of aspects 1-30, wherein the indication comprises a sequence carried on a single resource.

[0187] Aspect 32: The method according to Aspect 31, wherein the single resource comprises a physical sidelink feedback channel resource.

[0188] Aspect 33: The method according to any one of aspects 1-32, wherein the indication is carried using one or more physical sidelink feedback channel (PSFCH) resources.

[0189] Aspect 34: The method according to Aspect 33, wherein the one or more PSFCH resources are not used for feedback.

[0190] Aspect 35: A method according to any one of aspects 1-34, wherein the indication is carried using one or more spare physical resource blocks (PRBs) in the sidelink resource pool.

[0191] Aspect 36: A wireless communication method performed by a user equipment (UE), comprising: receiving a reservation for side link resources for communication of the first transmitter UE from a first transmitter UE, wherein the side link resources were previously reserved by a second transmitter UE for communication of the second transmitter UE; and sending an indication that the side link resources are reserved and the first transmitter UE is not permitted to reserve the side link resources.

[0192] Aspect 37: The method of aspect 36, wherein sending the indication comprises sending the indication based at least in part on a determination that the first transmitter UE is not permitted to preempt communications of the second transmitter UE.

[0193] Aspect 38: The method according to Aspect 36 or 37, wherein the UE comprises a second transmitter UE.

[0194] Aspect 39: A method according to aspect 36 or 37, wherein the UE comprises a receiver UE, wherein the receiver UE comprises: an intended receiver of communications of the first transmitter UE, an intended receiver of communications of the second transmitter UE, or a combination thereof.

[0195] Aspect 40: The method according to any one of aspects 36-39 further comprises sending a message to the base station indicating that the first transmitter UE is not permitted to reserve the sidelink resource.

[0196] Aspect 41: The method according to any of aspects 36-40, wherein the determination that the first transmitter UE is not permitted to preempt the communication of the second transmitter UE is based at least in part on the priority of the communication of the second transmitter UE.

[0197] Aspect 42: The method according to Aspect 41, wherein the priority of the communication of the second transmitter UE is higher than or equal to the priority of the communication of the first transmitter UE.

[0198] Aspect 43: The method according to any one of aspects 36-42, wherein the second transmitter UE reserves the sidelink resource using the sidelink control information.

[0199] Aspect 44: The method according to any of aspects 36-43, wherein the communication of the first transmitter UE is cancelled based at least in part on the indication.

[0200] Aspect 45: The method according to any of aspects 36-43, wherein the communication of the first transmitter UE is transmitted using a different sidelink resource instead of the sidelink resource based at least in part on the indication.

[0201] Aspect 46: The method according to Aspect 45, wherein the different side link resources are allocated by a base station.

[0202] Aspect 47: The method according to Aspect 46, wherein the different sidelink resources are selected by the first transmitter UE.

[0203] Aspect 48: The method according to Aspect 45, wherein the different sidelink resources are reserved by the first transmitter UE based at least in part on the indication.

[0204] Aspect 49: The method according to any one of aspects 36-48, wherein the communication of the first transmitter UE comprises: unicast transmission, broadcast transmission or multicast transmission.

[0205] Aspect 50: The method according to any one of aspects 36-49, wherein the indication does not identify the second transmitter UE.

[0206] Aspect 51: The method according to any one of aspects 36-50, wherein the indication is carried in a broadcast transmission.

[0207] Aspect 52: The method according to any one of aspects 36-51, wherein the indication is carried on a dedicated physical channel.

[0208] Aspect 53: The method according to Aspect 52, wherein the dedicated physical channel is a sequence-based physical channel.

[0209] Aspect 54: A method according to any one of aspects 36-53, wherein the indication is carried on a physical sidelink control channel (PSCCH).

[0210] Aspect 55: The method according to Aspect 54, wherein the indication is carried in Sidelink Control Information (SCI) on the PSCCH.

[0211] Aspect 56: The method according to Aspect 55, wherein the SCI comprises a Phase 1 SCI (SCI-1) transmission.

[0212] Aspect 57: The method according to Aspect 56, wherein the indication is explicitly indicated using at least one bit in the SCI-1 transmission.

[0213] Aspect 58: A method according to any one of Aspects 36-57, wherein the UE includes a second transmitter UE, and wherein the indication includes an additional reservation of side link resources for communication of the second transmitter UE, wherein the priority of the communication of the second transmitter UE is higher than the priority of the communication of the first transmitter UE.

[0214] Aspect 59: The method according to any one of aspects 36-58, wherein the indication is carried in a medium access control (MAC) control element.

[0215] Aspect 60: The method according to any one of aspects 36-58, wherein the indication is carried in a dedicated phase 2 sidelink control information format.

[0216] Aspect 61: A method according to any of aspects 36-60, wherein the indication comprises a sequence.

[0217] Aspect 62: The method according to any one of aspects 36-61, wherein the indication comprises a sequence identical to a physical sidelink feedback channel sequence.

[0218] Aspect 63: The method according to any of aspects 36-62, wherein the indication comprises a sequence generated based at least in part on a source identifier of the first transmitter UE.

[0219] Aspect 64: The method according to any of aspects 36-63, wherein the indication comprises a sequence transmitted based at least in part on a source identifier of the first transmitter UE.

[0220] Aspect 65: A method according to any one of aspects 36-64, wherein the indication comprises a sequence carried on a single resource.

[0221] Aspect 66: The method according to Aspect 65, wherein the single resource comprises a physical sidelink feedback channel resource.

[0222] Aspect 67: The method according to any one of aspects 36-66, wherein the indication is carried using one or more physical sidelink feedback channel (PSFCH) resources.

[0223] Aspect 68: The method according to Aspect 67, wherein the one or more PSFCH resources are not used for feedback.

[0224] Aspect 69: A method according to any one of aspects 36-68, wherein the indication is carried using one or more spare physical resource blocks (PRBs) in the sidelink resource pool.

[0225] Aspect 70: 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 the method of one or more aspects of aspects 1-35.

[0226] Aspect 71: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more aspects of aspects 1-35.

[0227] Aspect 72: An apparatus for wireless communication, comprising at least one component for performing the method of one or more of aspects 1-35.

[0228] Aspect 73: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-35.

[0229] Aspect 74: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 1-35.

[0230] Aspect 75: 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 the method of one or more aspects of aspects 36-69.

[0231] Aspect 76: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors configured to perform the method of one or more aspects of aspects 36-69.

[0232] Aspect 77: An apparatus for wireless communication, comprising at least one component for performing the method of one or more of aspects 36-69.

[0233] Aspect 78: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 36-69.

[0234] Aspect 79: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method of one or more aspects of aspects 36-69.

[0235] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the various aspects.

[0236] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. "Software" should be broadly interpreted as representing instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable programs, execution threads, processes and / or functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language or other. As used herein, the processor is implemented with a combination of hardware and / or hardware and software. It is clear that the system and / or method described herein can be implemented with a combination of hardware and / or hardware and software in different forms. The actual special control hardware or software code used to implement these systems and / or methods does not limit the various aspects. Therefore, the operation and behavior of the system and / or method are described herein without mentioning specific software codes-it can be understood that, based at least in part on the description herein, software and hardware can be designed to implement the system and / or method.

[0237] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0238] Even if a specific combination of features is described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, a plurality of these features can be combined in a manner that is not specifically described in the claims and / or not specifically disclosed in the specification. Although each of the listed dependent claims may only be directly subordinate to one claim, the disclosure of various aspects includes the combination of each dependent claim with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of those items, including a single member. As an example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other arrangement of a, b and c).

[0239] Unless explicitly described as critical or necessary, any element, behavior or instruction used herein should not be understood as critical or necessary. In addition, as used herein, the articles "one" and "an" are intended to include one or more items and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items quoted in conjunction with the article "the", and can be used interchangeably with "the one or more". In addition, as used herein, the terms "set / set" and "group" are intended to include one or more items (e.g., a combination of related items, unrelated items, or related and unrelated items), and can be used interchangeably with "one or more". If only for one project, the phrase "only one" or similar language is used. In addition, as used herein, the terms "have", "have", "with", etc. are intended to be open-ended terms. In addition, unless otherwise expressly stated, the phrase "based on" means "based at least in part on". Furthermore, as used herein, the term "or" when used in series is inclusive and can be used interchangeably with "and / or" unless expressly stated otherwise (eg, if used in conjunction with "either" or "only one of...").

Claims

1. An apparatus for wireless communication at a user equipment UE, comprising: one or more memories; as well as The one or more processors, based at least in part on information stored in the one or more memories, are configured to: sending, to a receiver UE, a reservation of sidelink resources for communication of the UE, wherein the sidelink resources were previously reserved by a transmitter UE for communication of the transmitter UE; as well as An indication is received from the receiver UE that the sidelink resources are reserved and the UE is not permitted to reserve the sidelink resources, wherein the indication comprises a sequence and is carried using one or more physical sidelink feedback channel (PSFCH) resources.

2. The device according to claim 1, wherein: The one or more processors for receiving the indication are configured to receive the indication based at least in part on a determination that the UE is not permitted to preempt communications of the sender UE.

3. The device according to claim 2, wherein: The determination that the UE is not permitted to preempt the communications of the sender UE is based at least in part on a priority of the communications of the sender UE, wherein the priority of the communications of the sender UE is higher than or equal to the priority of the communications of the UE.

4. The device according to claim 1, wherein: The receiver UE includes the transmitter UE.

5. The device according to claim 1, wherein: The receiver UE comprises: the intended receiver of the communication of the UE, the intended receiver of the communication of the sender UE, or A combination of them.

6. The device according to claim 1, wherein: The one or more processors are further configured to cancel communications of the UE based at least in part on receiving the indication.

7. The device according to claim 1, wherein: The one or more processors are further configured to transmit communications of the UE using different sidelink resources instead of the sidelink resources based at least in part on receiving the indication.

8. The device according to claim 7, wherein: The different sidelink resources are selected by the UE.

9. The device according to claim 1, wherein: The communication of the UE includes: Unicast transmission, Broadcast transmission, or Multicast transmission.

10. The device according to claim 1, wherein: The indication is carried in a first stage sidelink control information SCI transmission on the physical sidelink control channel PSCCH.

11. The device according to claim 10, wherein: The indication is explicitly indicated using at least one bit in the first phase SCI transmission.

12. The device according to claim 1, wherein: The indication is implied by an additional reservation by the sender UE of sidelink resources for communications of the sender UE, wherein the additional reservation indicates that the communications of the sender UE have a higher priority than the communications of the UE.

13. The device according to claim 1, wherein: The indication is carried in a Medium Access Control (MAC) control element.

14. The device according to claim 1, wherein: The indication is carried in a dedicated second stage sidelink control information format.

15. The device according to claim 1, wherein: The indication comprises the sequence which is the same as a physical sidelink feedback channel sequence.

16. The device according to claim 1, wherein The indication includes the sequence generated based at least in part on a source identifier of the UE.

17. The device according to claim 1, wherein: The indication includes the sequence sent based at least in part on a source identifier of the UE.

18. The device according to claim 1, wherein: The indication comprises the sequence carried on a single resource.

19. The device according to claim 18, wherein: The single resource comprises a physical sidelink feedback channel resource.

20. The device according to claim 1, wherein The one or more PSFCH resources are not used for feedback.

21. An apparatus for wireless communication at a user equipment UE, comprising: one or more memories; as well as The one or more processors, based at least in part on information stored in the one or more memories, are configured to: receiving, from a first transmitter UE, a reservation of sidelink resources for communication of the first transmitter UE, wherein the sidelink resources were previously reserved by a second transmitter UE for communication of the second transmitter UE; as well as An indication is sent to the first transmitter UE that the sidelink resources are reserved and the first transmitter UE is not permitted to reserve the sidelink resources, wherein the indication comprises a sequence and is carried using one or more physical sidelink feedback channel (PSFCH) resources.

22. The device according to claim 21, wherein The one or more processors for sending the indication are configured to send the indication based at least in part on a determination that the first transmitter UE is not permitted to preempt communications of the second transmitter UE.

23. The device according to claim 22, wherein: The determination that the first transmitter UE is not permitted to preempt the second transmitter UE's communications is based at least in part on a priority of the second transmitter UE's communications, wherein the priority of the second transmitter UE's communications is higher than or equal to the priority of the first transmitter UE's communications.

24. The device according to claim 21, wherein The UE includes the second transmitter UE.

25. The device according to claim 21, wherein The UE comprises a receiver UE, wherein the receiver UE comprises: an intended receiver of communications of the first transmitter UE, the intended receiver of the communication of the second sender UE, or A combination of them.

26. The device according to claim 21, wherein The UE comprises the second transmitter UE, and wherein the indication comprises an additional reservation of sidelink resources for the second transmitter UE, wherein communications of the second transmitter UE have a higher priority than communications of the first transmitter UE.

27. A wireless communication method performed by a user equipment UE, comprising: sending a reservation of sidelink resources for communication of the UE to a receiver UE, wherein the sidelink resources were previously reserved by a transmitter UE for communication of the transmitter UE; and An indication is received from the receiver UE that the sidelink resources are reserved and the UE is not permitted to reserve the sidelink resources, wherein the indication comprises a sequence and is carried using one or more physical sidelink feedback channel (PSFCH) resources.

28. A wireless communication method performed by a user equipment UE, comprising: receiving, from a first transmitter UE, a reservation of sidelink resources for communication of the first transmitter UE, wherein the sidelink resources were previously reserved by a second transmitter UE for communication of the second transmitter UE; and An indication is sent to the first transmitter UE that the sidelink resources are reserved and the first transmitter UE is not permitted to reserve the sidelink resources, wherein the indication comprises a sequence and is carried using one or more physical sidelink feedback channel (PSFCH) resources.

Images