Method and apparatus for sidelink communication sequencing

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive, from a base station on an access link, a first downlink control information (DCI) for scheduling a first communication on a physical sidelink shared channel (PSSCH) and a second DCI for scheduling a second communication on the PSSCH. The first communication and the second communication may be scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request identifiers on the PSSCH. The UE may send the scheduled first and second communications. Many other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. non-provisional patent application No. 17 / 303,344, filed on May 27, 2021, entitled “SIDELINK COMMUNICATION ORDERING,” which is expressly incorporated herein by reference. Technical Field

[0003] Aspects of the present disclosure generally relate to wireless communications and techniques and apparatus for sequencing 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, and 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 a number of base stations (BSs) that may support communications for a number of user equipments (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, and an "uplink" (or "reverse link") refers to a communication link from a UE to a BS. As further described in detail herein, a BS may be referred to as a Node B, a gNB, an Access Point (AP), a Radio Head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G Node B, and the like.

[0006] The above multiple access technologies have been adopted in a variety of 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 may also be referred to as 5G) is an enhanced set of LTE mobile standards promulgated by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation, so as to better support mobile broadband Internet access. As the demand for mobile broadband access continues to increase, further improvements to LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes receiving, from a base station on an access link, first downlink control information (DCI) that schedules a first communication on a physical sidelink shared channel (PSSCH) and a second DCI that schedules a second communication on the PSSCH. The first communication and the second communication may be scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH. The method may include sending the scheduled first communication and the second communication.

[0008] In some aspects, a method of wireless communication performed by a base station includes sending, to a UE on an access link, a first DCI that schedules a first communication to be sent by the UE on a PSSCH and a second DCI that schedules a second communication to be sent by the UE on the PSSCH. The first DCI and the second DCI may be sent and scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The method may include sending the first DCI and the second DCI according to the rule.

[0009] In some aspects, a method of wireless communication performed by a UE includes: receiving a first communication from a transmitting UE on a PSSCH; and sending feedback for the first communication on a physical sidelink feedback channel (PSFCH). The method may include: receiving a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH. The method may include: sending feedback for the second communication on the PSFCH.

[0010] In some aspects, a UE for wireless communication includes a memory and one or more processors coupled to the memory, configured to: receive a first DCI scheduling a first communication on a PSSCH and a second DCI scheduling a second communication on the PSSCH from a base station on an access link. The first communication and the second communication may be scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The one or more processors may be configured to send the scheduled first communication and the second communication.

[0011] In some aspects, a base station for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors configured to: send a first DCI to a UE on an access link that schedules a first communication to be sent by the UE on a PSSCH and a second DCI that schedules a second communication to be sent by the UE on the PSSCH. The first DCI and the second DCI may be sent and scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The one or more processors may be configured to send the first DCI and the second DCI according to the rule.

[0012] In some aspects, a UE for wireless communication includes a memory and one or more processors coupled to the memory, the one or more processors configured to: receive a first communication from a transmitting UE on a PSSCH, send feedback for the first communication on a PSFCH, and receive a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The one or more processors may be configured to send feedback for the second communication on the PSFCH.

[0013] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive, from a base station on an access link, a first DCI scheduling a first communication on a PSSCH and a second DCI scheduling a second communication on the PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and send the scheduled first communication and the second communication.

[0014] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a base station, cause the base station to: send a first DCI scheduling a first communication to be sent by the UE on a PSSCH and a second DCI scheduling a second communication to be sent by the UE on the PSSCH to a UE on an access link, wherein the first DCI and the second DCI are sent and scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and the first DCI and the second DCI are sent according to the rule.

[0015] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a UE, cause the UE to: receive a first communication from a transmitting UE on a PSSCH, send feedback for the first communication on a PSFCH, and receive a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and send the feedback for the second communication on the PSFCH.

[0016] In some aspects, an apparatus for wireless communication includes: a unit for receiving, from a base station on an access link, a first DCI for scheduling a first communication on a PSSCH and a second DCI for scheduling a second communication on the PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH; and a unit for sending the first communication and the second communication as scheduled.

[0017] In some aspects, an apparatus for wireless communication includes: a unit for sending a first DCI scheduling a first communication to be sent by the UE on a PSSCH and a second DCI scheduling a second communication to be sent by the UE on the PSSCH to a UE on an access link, wherein the first DCI and the second DCI are sent and scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and a unit for sending the first DCI and the second DCI according to the rule.

[0018] In some aspects, an apparatus for wireless communication includes: a unit for receiving a first communication from a transmitting UE on a PSSCH; a unit for sending feedback for the first communication on a PSFCH; a unit for receiving a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH; and a unit for sending feedback for the second communication on the PSFCH.

[0019] Aspects of the present invention 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 fully described herein with reference to and as illustrated in the accompanying drawings and description.

[0020] The features and technical advantages of the examples according to the present disclosure have been outlined quite extensively above so that the subsequent specific embodiments can be better understood. 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 the same purpose of performing the present disclosure. Such equivalent constructions do not deviate from the scope of protection of the attached claims. When considered in conjunction with the accompanying drawings, the characteristics of the concepts disclosed herein (both their organization and method of operation) and the associated advantages will be better understood according to the description below. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to limit the limits of the claims.

[0021] Although various aspects are described in the present disclosure by describing some examples, it will be understood by those skilled in the art that such aspects can be implemented in many 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 equipment, retail / purchase devices, medical devices, or devices enabled by 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 devices 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 adders). It is expected that the aspects described herein can be practiced in various devices, components, systems, distributed arrangements, or end-user devices of different sizes, shapes, and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to fully understand the above features of the present disclosure, a more specific description of the invention briefly summarized above can be obtained by referring to various aspects (some of which are shown in the accompanying drawings). However, it should be noted that the accompanying drawings show only some typical aspects of the present disclosure, and since the description may allow other equally effective aspects, it is not considered to be a limitation on its scope. The same reference numerals in different drawings may identify the same or similar elements.

[0023] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0024] Figure 2 is a diagram showing an example of a base station communicating with a user equipment (UE) in a wireless network according to the present disclosure.

[0025] Figure 3 is a diagram illustrating an example of sidelink communications according to the present disclosure.

[0026] Figure 4 is a diagram illustrating examples of sidelink communications and access link communications according to the present disclosure.

[0027] Figure 5 is a diagram illustrating an example of rules for overlapping sidelink communications according to the present disclosure.

[0028] Figure 6is a diagram illustrating an example of rules for sequencing sidelink communications according to the present disclosure.

[0029] Figure 7 is a diagram illustrating an example of rules for sequencing sidelink communications according to the present disclosure.

[0030] Figure 8 is a diagram illustrating an example of rules for sequencing sidelink communications according to the present disclosure.

[0031] Fig. 9 is a diagram illustrating an example of rules for sequencing sidelink communications according to the present disclosure.

[0032] Fig.10 is a diagram illustrating an example of rules for sequencing sidelink communications according to the present disclosure.

[0033] Fig.11 is a diagram illustrating an example process performed, for example, by a UE according to the present disclosure.

[0034] Fig.12 is a diagram illustrating an example process performed, for example, by a base station according to the present disclosure.

[0035] Fig.13 is a diagram illustrating an example process performed, for example, by a UE according to the present disclosure.

[0036] Figure 14-16 is a block diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0037] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be interpreted as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. Based on the teachings herein, it should be understood by those skilled in the art that the protection 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 can 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 implemented using other structures, functions, or structures and functions other than the various aspects of the disclosure set forth herein or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0038] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and methods 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 may be implemented using hardware, software, or a combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0039] 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 RATs beyond 5G (e.g., 6G).

[0040] Figure 1 is a diagram showing an example of a wireless network 100 according to the present disclosure. Among other examples, the wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network. The wireless network 100 may include a number 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 the BS may also be referred to as an NR BS, a Node B, a gNB, a 5G Node B (NB), an access point, a 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.

[0041] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by 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 1In the example shown, the BS may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and the BS may be a femto BS for femto cell 102c. The BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably herein.

[0042] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected with each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (e.g., direct physical connections or virtual networks, etc.) using any suitable transport network.

[0043] The wireless network 100 may also include a relay station. A relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data 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 1 In the example shown in , a relay BS 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay BS may also be referred to as a relay station, a relay base station, a relay, or the like.

[0044] The wireless network 100 may be a heterogeneous network including different types of BSs, such as macro BSs, pico BSs, femto BSs, relay BSs, 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 high 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).

[0045] A network controller 130 may be coupled to a set of BSs and 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 (eg, directly or indirectly via a wireless or wired backhaul).

[0046] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a 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 device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio device), a vehicle-mounted 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 medium or a wired medium.

[0047] 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 a network (e.g., a wide area network such as the Internet or a cellular network) or a connection to the network via a wired communication link or a 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 user premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component and / or a memory component). In some aspects, a processor component and a 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 operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0048] 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, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or RAT networks can be deployed.

[0049] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary to communicate 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 described elsewhere herein performed by base station 110.

[0050] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, frequency bands, channels, etc. based on frequency or wavelength. For example, the devices of the wireless network 100 may communicate using an operating frequency band having a first frequency range (FR1) (which may span from 410 MHz to 7.125 GHz), and / or may communicate using an operating frequency band having a second frequency range (FR2) (which may span from 24.25 GHz to 52.6 GHz). Frequencies between FR1 and FR2 are sometimes referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to as a "sub-6 GHz" band. Similarly, FR2 is often referred to as a "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) identified as a "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise specifically stated, it should be understood that the term "below 6 GHz" and the like (if used herein) can broadly refer to frequencies less than 6 GHz, frequencies within FR1, and / or mid-band frequencies (e.g., greater than 7.125 GHz). Similarly, unless otherwise specifically 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., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 can be modified, and the techniques described herein can be applied to those modified frequency ranges.

[0051] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive, from a base station on an access link, a first downlink control information (DCI) for scheduling a first communication on a physical sidelink shared channel (PSSCH) and a second DCI for scheduling a second communication on the PSSCH. The first communication and the second communication may be scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH. The communication manager 140 may send the scheduled first and second communications. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0052] In some aspects, the base station 110 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may send to the UE on an access link a first DCI that schedules a first communication to be sent by the UE on a PSSCH and a second DCI that schedules a second communication to be sent by the UE on a PSSCH. The first DCI and the second DCI may be sent and the first communication and the second communication may be scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The communication manager 150 may send the first DCI and the second DCI according to the rule. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0053] In some aspects, UE 120 may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive a first communication from a transmitting UE on a PSSCH, send feedback for the first communication on a physical sidelink feedback channel (PSFCH), and receive a second communication from the transmitting UE scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The communication manager 140 may send feedback for the second communication on the PSFCH. Additionally or alternatively, the communication manager 140 may perform one or more other operations described herein.

[0054] As indicated above, Figure 1 are provided as examples. Other examples can be found in Figure 1 Different than described.

[0055] Figure 2is 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.

[0056] At the base station 110, the transmit processor 220 may receive data intended for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for the 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 the 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)). 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 (if applicable), and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modem 232 may process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) 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.

[0057] 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. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) received signals to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM) to obtain received symbols. A 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. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 260, and provide decoded control information and system information to a 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 CQI parameter, etc. In some aspects, one or more components of the UE 120 may be included in the housing 284 .

[0058] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. For example, the network controller 130 may include one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0059] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or may be included within one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, among other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or antenna elements within multiple housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements coupled to one or more transmit and / or receive components, such as Figure 2 One or more components of a

[0060] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI) from a controller / processor 280. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266 (if any), further processed by the modulators 254a through 254r (e.g., for DFT-s-OFDM 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 antennas 252, modulators and / or demodulators 254, MIMO detectors 256, receive processors 258, transmit processors 264, and / or TX MIMO processors 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 1-16 described).

[0061] 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 to schedule the UE 120 for downlink communication and / or uplink communication. 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 antennas 234, modulators and / or demodulators 232, MIMO detectors 236, receive processors 238, transmit processors 220, and / or TX MIMO processors 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 1-16 described).

[0062] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other components in the base station 110 may perform one or more techniques associated with sequencing sidelink communications, as 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 may perform or direct e.g. Fig.11 Process 1100, Fig.12 The process 1200 Fig.13 The operations of process 1300 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, or 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, Fig.11 Process 1100, Fig.12 The process 1200 Fig.13 The process 1300 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.

[0063] In some aspects, the UE 120 includes: a unit for receiving, from a base station on an access link, a first DCI for scheduling a first communication on a PSSCH and a second DCI for scheduling a second communication on the PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH; and / or a unit for sending the scheduled first communication and the second communication. The unit for the UE 120 to perform the operations described herein may include, for example, one or more of the communication manager 140, the antenna 252, the demodulator 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the modulator 254, the controller / processor 280, or the memory 282.

[0064] In some aspects, the base station 110 includes: a unit for sending a first DCI to a UE on an access link that schedules a first communication to be sent by the UE on a PSSCH and a second DCI to schedule a second communication to be sent by the UE on a PSSCH, wherein the first DCI and the second DCI are sent and the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and / or a unit for sending the first DCI and the second DCI according to the rule. The unit for the base station 110 to perform the operations described herein may include, for example, one or more of the communication manager 150, the transmit processor 220, the TX MIMO processor 230, the modulator 232, the antenna 234, the demodulator 232, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246.

[0065] In some aspects, the UE 120 includes: a unit for receiving a first communication from a transmitting UE on a PSSCH; a unit for sending feedback for the first communication on a PSFCH; a unit for receiving a second communication scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on a PSSCH from a transmitting UE; and / or a unit for sending feedback for the second communication on a PSFCH. The units for the UE 120 to perform the operations described herein may include, for example, one or more of the communication manager 140, the antenna 252, the demodulator 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, the TX MIMO processor 266, the modulator 254, the controller / processor 280, or the memory 282.

[0066] Although Figure 2 The blocks in the 200 and 210 are shown as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described with respect 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.

[0067] As indicated above, Figure 2 are provided as examples. Other examples can be found in Figure 2 Different than described.

[0068] Figure 3 is a diagram illustrating an example 300 of sidelink communications in accordance with the present disclosure.

[0069] like Figure 3As shown, a transmitting device such as a first UE 305 can communicate with a receiving device such as a second UE 310 (and one or more other UEs) via one or more sidelink channels 315. UE 305 and UE 310 can communicate using one or more sidelink channels 315 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication and / or vehicle to pedestrian (V2P) communication) and / or mesh network. In some aspects, UE 305 and UE 310 may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, one or more sidelink channels 315 may use a PC5 interface and / or may operate in a high frequency band (e.g., a 5.9 GHz band). Additionally or alternatively, UE 305 and UE 310 may use a global navigation satellite system (GNSS) timing to synchronize the timing of a transmission time interval (TTI) (e.g., a frame, subframe, time slot, or symbol).

[0070] like Figure 3 As further shown, the one or more sidelink channels 315 may include a physical sidelink control channel (PSCCH) 320, a PSSCH 325, and / or a physical PSFCH 330. The PSCCH 320 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 communications with the base station 110 via an access link or access channel. The PSSCH 325 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 communications with the base station 110 via an access link or access channel. For example, the PSCCH 320 may carry sidelink control information (SCI) 335, which may indicate various control information for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, and / or space resources), where a transport block (TB) 340 may be carried on the PSSCH 325. The TB 340 may include data. The PSFCH 330 may be used to send sidelink feedback 345 , such as HARQ feedback (eg, acknowledgement or negative acknowledgement (ACK / NACK) information), transmit power control (TPC), and scheduling request (SR).

[0071] In some aspects, one or more sidelink channels 315 may use a resource pool. For example, a scheduling assignment (e.g., included in SCI 335) may be sent in a subchannel using specific resource blocks (RBs) across time. In some aspects, a data transmission associated with a scheduling assignment (e.g., on PSSCH 325) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, a scheduling assignment and associated data transmission are not sent on adjacent RBs.

[0072] 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). In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. For example, the UE 305 may measure RSSI parameters associated with various sidelink channels (e.g., sidelink-RSSI (S-RSSI) parameters), may measure RSRP parameters associated with various sidelink channels (e.g., PSSCH-RSRP parameters), may measure RSRQ parameters associated with various sidelink channels (e.g., PSSCH-RSRQ parameters), and may select a channel for transmitting sidelink communications based at least in part on the measurements.

[0073] Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling using the SCI 335 received in the PSCCH 320, which may indicate occupied resources and / or channel parameters. Additionally or alternatively, the UE 305 may perform resource selection and / or scheduling by determining a channel busy rate (CBR) associated with each sidelink channel, 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).

[0074] 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 335. The sidelink grant may indicate, for example, 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 340) to be used for an upcoming sidelink transmission on the PSSCH 325, 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 indicating one or more parameters for 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, such as for an on-demand sidelink message.

[0075] As indicated above, Figure 3 are provided as examples. Other examples can be found in Figure 3 Different than described.

[0076] Figure 4 is a diagram illustrating an example 400 of sidelink and access link communications in accordance with the present disclosure.

[0077] like Figure 4 As shown in FIG. , UE 305 and UE 310 may communicate with each other via a side link, as described above in conjunction with Figure 3 As further shown, in some sidelink modes, BS 110 may communicate with UE 305 via a first access link. If UE 305 schedules communication resources for UE 310 with the assistance of base station 110, this may be referred to as sidelink "mode 1". If UE 305, rather than base station 110, schedules communication resources for UE 310, this may be referred to as sidelink "mode 2". UE 305 and UE 310 may correspond to one or more UEs described elsewhere herein, such as Figure 1120. Thus, a direct link between UEs 120 (e.g., via a PC5 interface) may be referred to as a sidelink, and a direct link between a base station and a UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be sent via a sidelink, and access link communications may be sent via an access link. Access link communications may be downlink communications (from a base station 110 to a UE 120) or uplink communications (from a UE 120 to a base station 110). In some aspects, a UE 305 may receive a first DCI that schedules a first communication on a PSSCH and a second DCI that schedules a second communication on a PSSCH. The UE 305 may send the first communication and the second communication according to the scheduling indicated by the first DCI and the second DCI, respectively.

[0078] For communications on the access link, BS110 may use a downlink "out of order" (OoO) rule to avoid UE 305 from receiving communications on the PDSCH out of order. For example, if a second communication on the PDSCH is received by UE 305 on the PDSCH before receiving the first communication, the second communication and the first communication may be out of order if the first communication is intended to be received by UE 305 before the second communication. To avoid this OoO scenario, the downlink OoO rule may specify that for a given HARQ process, UE 305 is not expected to receive the second communication until a HARQ-ACK for the first communication is sent. BS110 and UE 305 may also operate according to the uplink OoO rule. For example, the rule may specify that UE 305 is not expected to send a first communication on PUSCH concurrently with the second communication, and UE 305 may not be scheduled to send a second communication on PUSCH before the end of the first communication.

[0079] For sidelink communications, PSSCH and PSFCH are designed to be ordered. However, currently, there are no rules for ordering or overlapping communications with respect to DCI, HARQ ID, and communications on PSSCH, PSFCH, and PUCCH. There are currently no rules for ordering sidelink communications and HARQ feedback when the receiving UE of the sidelink channel is to send HARQ feedback. There are currently no rules for ordering sidelink communications with respect to listen-before-talk (LBT) failure reports. In the absence of explicit rules for sidelink channels, sidelink communications and HARQ feedback for sidelink communications may be received out of order or in a manner that consumes additional processing resources and signaling resources of the sidelink UE.

[0080] According to various aspects described herein, UE 305 may be configured to receive DCI and transmit communications according to one or more rules for sequencing or overlapping communications on PSSCH. Communications on PSSCH may be associated with a HARQ process identified by a HARQ ID. For example, in a first scenario where HARQ feedback is disabled and the HARQ ID is the same for a first communication and a second communication, a rule may specify that a second DCI scheduling a second communication may be received after the first communication is transmitted and before the second communication is transmitted. For this first scenario, another rule may specify that the first communication is transmitted after the second DCI is received.

[0081] In a second scenario where HARQ feedback is enabled and the HARQ ID is the same for the first communication and the second communication, the rule may specify that the second DCI may be received after sending feedback for the first communication. For this second scenario, another rule may specify that the second DCI is received after sending the first communication and before sending feedback for the first communication, and the second communication is sent after sending feedback for the first communication.

[0082] Another rule may specify that the first communication and the second communication do not overlap on the PSSCH, but may overlap if the HARQ IDs are different and the receiving UEs are different.Other rules may be specified, including for scenarios where the HARQ ID of the first communication is different from the HARQ ID of the second communication.

[0083] Example 400 shows an access link for uplink and downlink between BS 110 and UE 305 and sidelink (PSSCH and PSFCH) between UE 305 and UE 310. BS 110, UE 305, and UE 310 may operate in sidelink mode 1, where BS 110 uses DCI to schedule sidelink communications for UE 305. As shown in reference numeral 405, UE 305 may receive DCI (first DCI and second DCI). As shown in reference numeral 410, UE 305 may send communications (first communications and second communications) to UE 310. If feedback is enabled, UE 310 may send feedback to UE 305, as shown in reference numeral 415. As shown in reference numeral 420, UE 305 may send feedback to BS 110. In some scenarios, UE 310 may send feedback directly to BS 110. The timing of feedback, DCI, and sidelink communications may be based at least in part on rules for sequencing or overlapping sidelink communications. By following one or more rules for sequencing or overlapping sidelink communications, UE 305, UE 310, and / or BS 110 may save processing resources and signaling resources.

[0084] As indicated above, Figure 4 are provided as examples. Other examples can be found in Figure 4 Different than described.

[0085] Figure 5 5 is a diagram illustrating an example 500 of a rule for overlapping sidelink communications according to the present disclosure. BS 110 may send a scheduling DCI in DCI format 3_0 to UE 305 on PDCCH. UE 305 may send communications to UE 310 and another UE 514 on PSSCH. UE 305 may be considered a transmitting UE and may be an anchor node or controller serving multiple receivers (e.g., a sensor). UE 305 may frequency division multiplex (FDM) communications to different receivers. UE 310 and UE 514 may be considered receiving UEs.

[0086] The first communication 510 on the PSSCH may be scheduled by the first DCI 516, and the second communication 512 on the PSSCH may be scheduled by the second DCI 518. In some aspects, the rules may specify that it is not expected for the UE 305 to send two overlapping communications for the same HARQ ID on the PSSCH. Therefore, the UE 305 may not send the first communication 510 in the same time slot or time that overlaps with the second communication 512.

[0087] In some aspects, the rule may specify that the UE 305 may send two overlapping communications on the PSSCH for two corresponding receiving UEs (such as UE 310 and UE 514) associated with different HARQ IDs. Thus, the UE 305 may send a first communication 510 in the same time slot or time that overlaps with the second communication 512. The first DCI 516 may overlap with the second DCI 518. That is, the DCI may schedule a communication on the PSSCH in the same time slot as a previously scheduled communication on the PSSCH. The number of parallel communications that the UE 305 may send on the PSSCH may be based at least in part on the UE capabilities of the UE 305 or the stored configuration information. By specifying rules for overlapping sidelink communications, the UE 305 may operate more cleanly and avoid wasting processing resources and signaling resources.

[0088] In some aspects, when the UE 305 is configured with multiple resource pools, one or more rules for ordering or overlapping may be specified across the multiple resource pools. This may be more applicable when the HARQ process is shared across multiple resource pools. Alternatively, one or more rules may be applied for each resource pool.

[0089] As indicated above, Figure 5 are provided as examples. Other examples can be found in Figure 5Different than described.

[0090] Figure 6 600 and 602 are diagrams illustrating examples of rules for sequencing sidelink communications according to the present disclosure. Examples 600 and 602 illustrate a BS 110 sending a DCI to a UE 305. The UE 305 may send communications scheduled by the DCI.

[0091] In examples 600 and 602, feedback may be disabled for the UE 305, and the HARQ ID for the DCI may be the same (HARQ 0). In some aspects, the rule illustrated by example 600 may specify that the UE 305 is not expected to send a second communication 512 scheduled by the second DCI 518 until after the first communication 510 for the same HARQ ID. The UE 305 may receive the second DCI 518 after the first communication 510 is sent. Another rule illustrated by example 602 may specify that the UE 305 is not expected to send the second communication 512 until after the end of the first communication 510 from the same HARQ ID. The UE 305 may receive the second DCI 518 before sending the first communication 510. In some aspects, the UE 305 may receive the second DCI 518 before the end of the first communication 510 for the same HARQ ID for blind retransmission.

[0092] As indicated above, Figure 6 Some examples are provided. Other examples can be found in Figure 6 Different than described.

[0093] Figure 7 700, 702, and 704 illustrate examples 110 of rules for sequencing sidelink communications according to the present disclosure. Examples 110, 702, and 704 illustrate BS 110 sending DCI to UE 305. UE 305 may send communications to UE 310 scheduled by the DCI.

[0094] In example 700, example 702, and example 704, feedback may be enabled for UE 305, and the HARQ ID used for the DCI may be the same (HARQ 0). UE 305 may not be ready to receive a new grant for the same HARQ ID because UE 305 may not have flushed the buffer after receiving feedback 710 for the first communication 510 from UE 310 on the PSFCH or after sending feedback 710 to BS 110. Feedback 710 sent on the PUCCH is shown as feedback 712. In some aspects, the rules illustrated by example 700 may specify that UE 305 is not expected to receive the second DCI 518 until UE 305 has sent feedback 712 on the PUCCH. BS 110 may require feedback 712 before scheduling a new transport block or rescheduling a retransmission. Another rule, illustrated by example 702 , may specify that the UE 305 receive the second DCI 518 after the end of the first communication 510 , but the second communication 512 is not expected to be sent before the UE 305 has sent feedback 712 .

[0095] In some aspects, the BS 110 may receive the feedback 712 directly from the UE 310 on the PUCCH, and the BS 110 may identify the feedback 712 as coming from the UE 310. The rule illustrated by the example 704 may specify that the UE 305 is not expected to receive the second DCI 518 until after the UE 305 has received the feedback 710 on the PSFCH, or after the UE 310 has sent the feedback 712 to the BS 110 on the PUCCH. The BS 110 may be expected to have information about the PSFCH pool configuration and the UE to which the feedback 712 belongs. The BS 110 may receive the feedback 712 from the UE 310 on the PUCCH, and the UE 310 may send the feedback 710 to the UE 305 on the PSFCH. The UE 305 may forward the priority indicator from the DCI and / or the PSFCH to HARQ feedback timing indicator to the UE 310 via the SCI. The UE 305 may use the feedback 710 from the UE 310 on the PSFCH for HARQ buffer management. The BS 110 may not send the second DCI 518 (another grant for the same HARQ ID) before the BS 110 receives the feedback 712 from the UE 310 on the PUCCH.

[0096] As indicated above, Figure 7 Some examples are provided. Other examples can be found in Figure 7 Different than described.

[0097] Figure 88 is a diagram illustrating examples 800, 802, and 804 of rules for sequencing sidelink communications according to the present disclosure. Examples 800, 802, and 804 illustrate BS 110 sending DCI to UE 305. UE 305 may send communications to UE 310 scheduled by the DCI.

[0098] In example 800, feedback may be disabled for UE 305 and the HARQ IDs used for DCI are different (HARQ0 and HARQ 1). The rules may specify that UE 305 does not expect second DCI 518 to schedule second communication 512 earlier than first communication 510. UE 305 may not expect OoO scheduling delays from DCI.

[0099] In examples 802 and 804, feedback may be enabled for UE 305, and the HARQ IDs used for DCI are different (HARQ 0 and HARQ 1). UE 305 may receive feedback 810 for the second communication 512 from UE 310 on the PSFCH, and UE 305 may send feedback 812 for the second communication 512 to BS 110 on the PUCCH. Note that feedback 812 is the same feedback as feedback 810, but feedback 810 is sent on the PSFCH and feedback 812 is sent on the PUCCH. In some aspects, the rules illustrated by example 802 may specify that it is not expected that UE 305 sends feedback 812 for the second communication 512 to BS 110 on the PUCCH before UE 305 sends feedback 712 for the first communication 510 to BS 110 on the PUCCH. That is, UE 305 may operate using OoO scheduling rules and OoO HARQ timing rules.

[0100] In example 804, BS 110 may receive feedback 712 and 812 directly from UE 310, and BS 110 may identify feedback 712 and 812 as coming from UE 310. The rules illustrated by example 804 may specify that UE 305 is not expected to receive second DCI 518 until after first DCI 516, and feedback 812 for second communication 512 is not expected to be sent on PUCCH until feedback 712 for first communication 510 is sent.

[0101] As indicated above, Figure 8 Some examples are provided. Other examples can be found in Figure 8 Different than described.

[0102] Fig. 99 is a diagram illustrating examples 900 and 902 of rules for ordering sidelink communications according to the present disclosure. Examples 900 and 902 illustrate that UE 310 may send feedback for communications received from UE 305.

[0103] In some aspects, the UE 305 may receive a PSFCH timing indication from the BS 110 on the PSCCH. The PSFCH timing indication may provide more flexible timing, but may still be limited by the rules used for sorting. In example 900, feedback may be enabled for the UE 305, and the HARQ ID used for the DCI may be the same (HARQ 0). The rule may specify that the UE 310 is not expected to receive the second communication 512 until the UE 310 has sent feedback 710 for the first communication to the UE 305 on the PSFCH. The UE 305 may expect feedback 710 on the PSFCH before scheduling a new transport block or rescheduling a transmission (in sidelink mode 2).

[0104] In example 902, the HARQ IDs used for the DCI are different (HARQ 0 and HARQ 1). The rule may specify that the UE 310 is not expected to send feedback 810 for the second communication 512 on the PSFCH until the UE 310 has sent feedback 710 for the first communication on the PSFCH to the UE 305. The second communication 512 may be received before the feedback 710 for the first communication 510 is sent.

[0105] As indicated above, Fig. 9 Some examples are provided. Other examples can be found in Figure 8 Different than described.

[0106] Fig.10 is a diagram illustrating an example 1000 of a rule for sequencing sidelink communications in accordance with the present disclosure. Example 1000 illustrates that BS 110 may send a DCI that schedules communications to be sent by UE 305.

[0107] In a shared or unlicensed band, a transmitting device may compete with other devices for channel access before transmitting on a shared or unlicensed channel to reduce and / or prevent conflicts on a shared or unlicensed channel. In order to compete for channel access, a transmitting device may perform a channel access process, such as an LBT process. The LBT process may be performed to determine whether a physical channel (e.g., a radio resource of a channel) is idle or busy (e.g., being used by another wireless communication device). The LBT process may include sensing or measuring a physical channel during a channel access gap (e.g., performing an RSRP measurement, detecting an energy level, or performing another type of measurement), and determining whether a shared or unlicensed channel is idle or busy based at least in part on a signal sensed or measured on the physical channel (e.g., based at least in part on whether the measurement satisfies a threshold). If the transmitting device determines that the LBT process is successful, the transmitting device may perform one or more transmissions on a shared or unlicensed channel during a transmission opportunity, which may extend the channel occupancy time (COT). The transmitting device may provide a failed or successful LBT report. The UE 305 may perform LBT and send an LBT report to the BS 110.

[0108] In some aspects, if there is an LBT failure, the UE 305 may send an early LBT report 910 on the PUCCH. The BS 110 may use the DCI 912 to reschedule the UE 305 for a retransmission 914 (same HARQ ID) before receiving feedback 712 for the first communication 510. In the case of an LBT failure, the UE 305 may desire to wait for a retransmission grant. The DCI 912 may be an additional grant for retransmission, or the first DCI 516 may indicate up to two retransmission resources.

[0109] If feedback is enabled (for the same HARQ ID) and early LBT reporting is enabled, the rules may specify that if the UE 305 fails LBT prior to the first communication 510, the UE 305 is not expected to receive another DCI 912 until the UE 305 has sent an early LBT report on the PUCCH. If the LBT is successful, the UE 305 does not deviate from the normal process. That is, the UE 305 is not expected to receive another DCI 912 until the UE 305 has sent feedback 712 on the PUCCH. Although the UE 305 can use the DCI 912 for retransmissions, in some aspects, the UE 305 can use the DCI 912 for new transmissions by switching a new data indicator.

[0110] By specifying rules for receiving DCI, sending communications, and providing feedback on the sidelink, UE 305 and UE 310 can avoid out-of-order communications, undesirable overlaps, and other conflicts that degrade communications. Therefore, BS 110, UE 305, and UE 310 can save processing resources and signaling resources that would otherwise be consumed by retransmissions.

[0111] As indicated above, Fig.10 are provided as examples. Other examples can be found in Fig.10 Different than described.

[0112] Fig.11 1 is a diagram illustrating an example process 1100 performed, for example, by a UE in accordance with the present disclosure. Example process 1100 is an example in which a UE (eg, UE 120, UE 305) performs operations associated with sequencing sidelink communications.

[0113] like Fig.11 As shown, in some aspects, process 1100 may include receiving, from a base station on an access link, a first DCI for scheduling a first communication on a PSSCH and a second DCI for scheduling a second communication on a PSSCH (block 1110). For example, a UE (e.g., using Fig.14 The communication manager 140 and / or receiving component 1402 depicted in FIG. 1 can receive a first DCI for scheduling a first communication on a PSSCH and a second DCI for scheduling a second communication on a PSSCH from a base station on an access link, as described above. In some aspects, the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH.

[0114] like Fig.11 As further shown, in some aspects, process 1100 may include sending the scheduled first communication and the second communication (block 1120). For example, a UE (e.g., using Fig.14 The communication manager 140 and / or sending component 1404 depicted in FIG. 1404 may send the scheduled first communication and second communication as described above.

[0115] Process 1100 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0116] In a first aspect, the rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

[0117] In a second aspect, alone or in combination with the first aspect, a rule specifies that if the HARQ ID used for the first communication is different from the HARQ ID used for the second communication and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, the first communication and the second communication can overlap in time on the PSSCH.

[0118] In a third aspect, alone or in combination with one or more of the first and second aspects, feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after the first communication and before the second communication.

[0119] In a fourth aspect, alone or in combination with one or more of the first to third aspects, feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

[0120] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after sending feedback for the first communication to the base station.

[0121] In a sixth aspect, feedback is enabled, either alone or in combination with one or more of the first to fifth aspects, and a first DCI and a second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after the first communication and before feedback for the first communication is sent to the base station, and the second communication is after feedback for the first communication is sent to the base station.

[0122] In the seventh aspect, feedback is enabled, either alone or in combination with one or more of the first to sixth aspects, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after feedback for the first communication is received from a receiving UE that receives the first communication, or after feedback for the first communication is sent to the base station.

[0123] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that: the first communication is after the second DCI, and the second communication is after the first communication.

[0124] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that feedback for the first communication is to be sent to the base station before feedback for the second communication is sent to the base station.

[0125] In the tenth aspect, alone or in combination with one or more aspects of the first to ninth aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies: before the receiving UE that receives the second communication sends feedback for the second communication to the base station, the receiving UE that receives the first communication sends feedback for the first communication to the base station.

[0126] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second communication is after feedback for the first communication is received on the PSFCH from a receiving UE that received the first communication.

[0127] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that the second communication is before feedback for the first communication is received on the PSFCH from a receiving UE that receives the first communication.

[0128] In the thirteenth aspect, feedback and early LBT reporting are enabled, either alone or in combination with one or more of the first to twelfth aspects, and the first DCI and the second DCI are for the same HARQ ID, and the rules specify that if LBT fails before sending the first communication, the second DCI is not received until after the early LBT report is sent to the base station.

[0129] In a fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, the UE is configured with multiple resource pools, and the rule is applied across the multiple resource pools.

[0130] In a fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, the UE is configured with multiple resource pools, and a rule is applied for each resource pool.

[0131] although Fig.11 An example block diagram of process 1100 is shown, but in some aspects, process 1100 may include more Fig.11 More blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1100. Additionally or alternatively, two or more blocks of the process 1100 may be executed in parallel.

[0132] Fig.12 1 is a diagram illustrating an example process 1200 performed, for example, by a base station in accordance with the present disclosure. Example process 1200 is an example in which a base station (eg, base station 110) performs operations associated with sequencing sidelink communications.

[0133] like Fig.12 As shown, in some aspects, process 1200 may include sending, on an access link, to a UE a first DCI scheduling a first communication to be sent by the UE on a PSSCH and a second DCI scheduling a second communication to be sent by the UE on the PSSCH (block 1210). For example, a base station (e.g., using Fig.15 The communication manager 150 and / or the transmission component 1504 depicted in the figure can send a first DCI to the UE on the access link to schedule a first communication to be sent by the UE on the PSSCH and a second DCI to schedule a second communication to be sent by the UE on the PSSCH, as described above. In some aspects, the first DCI and the second DCI are sent and the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH.

[0134] like Fig.12 As further shown, in some aspects, process 1200 may include sending the first DCI and the second DCI according to a rule (block 1220). For example, a base station (e.g., using Fig.15 The communication manager 150 and / or the sending component 1504 depicted in the figure can send the first DCI and the second DCI according to the rules, as described above.

[0135] Process 1200 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0136] In a first aspect, the rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

[0137] In a second aspect, either alone or in combination with the first aspect, if the HARQ ID used for the first communication is different from the HARQ ID used for the second communication and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, the rule specifies that the first communication and the second communication can overlap in time on the PSSCH.

[0138] In a third aspect, alone or in combination with one or more of the first and second aspects, feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after the first communication and before the second communication.

[0139] In a fourth aspect, alone or in combination with one or more of the first to third aspects, feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

[0140] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is after receiving feedback for the first communication from the UE.

[0141] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rules specify: the second DCI is after the first communication and before feedback for the first communication is received from the UE, and the second communication is after feedback for the first communication is received from the UE.

[0142] In the seventh aspect, feedback is enabled, either alone or in combination with one or more of the first to sixth aspects, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second DCI is received by the UE after feedback for the first communication is received from a receiving UE that receives the first communication, or after feedback for the first communication is received by the base station.

[0143] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that: the first communication is after the second DCI, and the second communication is after the first communication.

[0144] In a ninth aspect, either alone or in combination with one or more of the first to eighth aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that feedback for the first communication is to be received from the UE before feedback for the second communication is received from the UE.

[0145] In the tenth aspect, alone or in combination with one or more of the first to ninth aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that feedback for the first communication is to be received from the receiving UE that receives the first communication before the receiving UE that receives the second communication receives feedback for the second communication.

[0146] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rule specifies that the second communication is received by the UE on the PSFCH after feedback for the first communication is received from a receiving UE that receives the first communication.

[0147] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and the rule specifies that the second communication is received by the UE on the PSFCH before feedback for the first communication is received from the receiving UE that receives the first communication.

[0148] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, feedback and early LBT reporting are enabled, and the first DCI and the second DCI are for the same HARQ ID, and the rules specify that if LBT fails before sending the first communication, the second DCI is not sent until an early LBT report is received from the UE.

[0149] although Fig.12 An example block diagram of process 1200 is shown, but in some aspects, process 1200 may include more Fig.12 The blocks depicted in the process 1200 may be more blocks, fewer blocks, different blocks, or differently arranged blocks. Additionally or alternatively, two or more blocks of the process 1200 may be executed in parallel.

[0150] Fig.13 1 is a diagram illustrating an example process 1300 performed, for example, by a UE in accordance with the present disclosure. Example process 1300 is an example in which a UE (eg, UE 120, UE 310) performs operations associated with sequencing sidelink communications.

[0151] like Fig.13 As shown, in some aspects, process 1300 may include receiving a first communication from a transmitting UE on a PSSCH (block 1310). For example, a UE (e.g., using Fig.16 The communication manager 140 and / or receiving component 1602 depicted in FIG. 1 may receive a first communication from a transmitting UE on the PSSCH, as described above.

[0152] like Fig.13 As further shown, in some aspects, process 1300 may include sending feedback for the first communication on the PSFCH (block 1320). For example, as described above, the UE (e.g., using Fig.16 The communication manager 140 and / or the sending component 1604 depicted in FIG. 1 may send feedback for the first communication on the PSFCH.

[0153] like Fig.13 As further shown, in some aspects, process 1300 may include receiving from the transmitting UE a second communication scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH (block 1330). Fig.16 The communication manager 140 and / or receiving component 1602 depicted in FIG. 1 may receive from the transmitting UE a second communication scheduled according to rules for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, as described above.

[0154] like Fig.13 As further shown, in some aspects, process 1300 may include sending feedback for the second communication on the PSFCH (block 1340). For example, as described above, the UE (e.g., using Fig.16 The communication manager 140 and / or sending component 1604 depicted in FIG. 1 may send feedback for the second communication on the PSFCH.

[0155] Process 1300 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0156] In a first aspect, a first communication and a second communication are for the same HARQ ID, and the rule specifies that the second communication is to be received after sending feedback for the first communication.

[0157] In a second aspect, alone or in combination with the first aspect, the first communication and the second communication are for different HARQ IDs, and the rule specifies that the second communication is to be received before sending feedback for the first communication.

[0158] Process 1300 may include receiving and using the same rules as used for process 1100, and process 1100 may include receiving and using the same rules as used for process 1300. The rules used by the UE in process 1100 and by the UE in process 1300 may be received from the base station described in conjunction with process 1200. In some aspects, process 1100 may include any of the blocks or aspects described in conjunction with process 1300, and process 1300 may include any of the blocks or aspects described in conjunction with process 1100. For example, in some aspects, process 1100 may also include: receiving a third communication on the PSSCH, sending feedback for the third communication on the PSFCH, receiving a fourth communication scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH, and sending feedback for the second communication on the PSFCH. In some aspects, the third communication and the fourth communication may be for the same HARQ ID, and the rule specifies that the fourth communication is to be received after sending feedback for the third communication. In some aspects, the third communication and the fourth communication may be for different HARQ IDs, and the rule specifies that the fourth communication is to be received before sending feedback for the third communication.

[0159] Although Fig.13 Example blocks of process 1300 are shown, but in some aspects, process 1300 may include Fig.13 The blocks described in the process 1300 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 1300. Additionally or alternatively, two or more blocks of the process 1300 may be performed in parallel.

[0160] Fig.14 1 is a block diagram of an example apparatus 1400 for wireless communication. Apparatus 1400 may be a UE, or a UE may include apparatus 1400. In some aspects, apparatus 1400 includes a receiving component 1402 and a transmitting component 1404, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1400 may communicate with another apparatus 1406 (such as a UE, a base station, or another wireless communication device) using receiving component 1402 and transmitting component 1404. As further shown, apparatus 1100 may include a communication manager 140. In addition to other examples, communication manager 140 may also include feedback component 1408.

[0161] In some aspects, the apparatus 1400 may be configured to perform the Figure 1-Figure 10 Additionally or alternatively, the apparatus 1400 may be configured to perform one or more processes described herein, such as Fig.11In some aspects, the apparatus 1400 and / or Fig.14 One or more of the components shown may include the above combined Figure 2 One or more components of the UE described. Additionally or alternatively, the above may be combined Figure 2 One or more components described are implemented in Fig.14 One or more components shown. Additionally or alternatively, one or more components in a set of components may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0162] The receiving component 1402 may receive communications from the apparatus 1406, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1402 may provide the received communications to one or more other components of the apparatus 1400. In some aspects, the receiving component 1402 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the apparatus 1406. In some aspects, the receiving component 1402 may include the above in combination with Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0163] Transmit component 1404 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to device 1406. In some aspects, one or more other components of device 1406 may generate communications and may provide the generated communications to transmit component 1404 for transmission to device 1406. In some aspects, transmit component 1404 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to device 1406. In some aspects, transmit component 1404 may include the above in combination with Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, the transmit component 1404 can be co-located with the receive component 1402 in a transceiver.

[0164] The receiving component 1402 may receive, from a base station on an access link, a first DCI for scheduling a first communication on a PSSCH and a second DCI for scheduling a second communication on a PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The sending component 1404 may send the scheduled first and second communications. The feedback component 1408 and the receiving component 1402 may receive feedback for the first communication and / or the second communication. The feedback component 1408 and the sending component 1404 may send feedback to the base station.

[0165] Fig.14 The number and arrangement of components shown in are provided as examples. In practice, there may be Fig.14 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.14 Two or more components shown in the figure may be implemented in a single component, or Fig.14 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.14 A set (one or more) of components shown in can perform the operations described as being Fig.14 One or more functions performed by another set of components shown in FIG.

[0166] Fig.15 1 is a block diagram of an example apparatus 1500 for wireless communication. Apparatus 1500 may be a base station, or a base station may include apparatus 1500. In some aspects, apparatus 1500 includes a receiving component 1502 and a transmitting component 1504, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1500 may communicate with another apparatus 1506 (such as a UE, a base station, or another wireless communication device) using receiving component 1502 and transmitting component 1504. As further shown, apparatus 1100 may include a communication manager 150. In addition to other examples, communication manager 150 may also include a scheduling component 1508.

[0167] In some aspects, the apparatus 1500 may be configured to perform the Figure 1-Figure 10 Additionally or alternatively, the apparatus 1500 may be configured to perform one or more processes described herein, such as Fig.12 In some aspects, the apparatus 1500 and / or Fig.15 One or more of the components shown may include the above combined Figure 2 One or more components of the base station described. Additionally or alternatively, the above may be combined Figure 2 One or more components described are implemented in Fig.15 One or more components shown. Additionally or alternatively, one or more components in a set of components may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0168] The receiving component 1502 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1506. The receiving component 1502 may provide the received communications to one or more other components of the apparatus 1500. In some aspects, the receiving component 1502 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the apparatus 1506. In some aspects, the receiving component 1502 may include the above in combination with Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of a base station are described.

[0169] Transmit component 1504 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to device 1506. In some aspects, one or more other components of device 1506 may generate communications and may provide the generated communications to transmit component 1504 for transmission to device 1506. In some aspects, transmit component 1504 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to device 1506. In some aspects, transmit component 1504 may include the above in combination with Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described base stations. In some aspects, the transmit component 1504 can be co-located with the receive component 1502 in a transceiver.

[0170] The transmission component 1504 can send a first DCI to the UE on the access link to schedule a first communication to be sent by the UE on a physical sidelink shared channel (PSSCH) and a second DCI to schedule a second communication to be sent by the UE on the PSSCH, wherein the first DCI and the second DCI are sent. The scheduling component 1508 can schedule the first DCI, the second DCI, the first communication, and the second communication according to a rule for overlapping or ordering communications associated with one or more HARQIDs on the PSSCH. The transmission component 1504 can send the first DCI and the second DCI according to the rule.

[0171] Fig.15 The number and arrangement of components shown in are provided as examples. In practice, there may be Fig.15 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.15 Two or more components shown in the figure may be implemented in a single component, or Fig.15 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.15 A set (one or more) of components shown in can perform the operations described as being Fig.15 One or more functions performed by another set of components shown in FIG.

[0172] Fig.16 1 is a block diagram of an example apparatus 1600 for wireless communication. Apparatus 1600 may be a UE, or a UE may include apparatus 1600. In some aspects, apparatus 1600 includes a receiving component 1602 and a transmitting component 1604, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1600 may communicate with another apparatus 1606 (such as a UE, a base station, or another wireless communication device) using receiving component 1602 and transmitting component 1604. As further shown, apparatus 1100 may include a communication manager 140. In addition to other examples, communication manager 140 may also include feedback component 1608.

[0173] In some aspects, the apparatus 1600 may be configured to perform the Figure 1-Figure 10 Additionally or alternatively, the apparatus 1600 may be configured to perform one or more processes described herein, such as Fig.13 In some aspects, the apparatus 1600 and / or Fig.16 One or more components shown in the figure may include the above combination Figure 2 One or more components of the UE described. Additionally or alternatively, the above may be combined Figure 2 One or more components described are implemented in Fig.16 One or more components shown. Additionally or alternatively, one or more components in a set of components may be at least partially implemented as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and executable by a controller or processor to perform the function or operation of the component.

[0174] The receiving component 1602 may receive communications from the apparatus 1606, such as reference signals, control information, data communications, or a combination thereof. The receiving component 1602 may provide the received communications to one or more other components of the apparatus 1600. In some aspects, the receiving component 1602 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the apparatus 1606. In some aspects, the receiving component 1602 may include the above in combination with Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0175] Transmit component 1604 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to device 1606. In some aspects, one or more other components of device 1606 may generate communications and may provide the generated communications to transmit component 1604 for transmission to device 1606. In some aspects, transmit component 1604 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to device 1606. In some aspects, transmit component 1604 may include the above in combination with Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the described UE. In some aspects, the transmit component 1604 can be co-located with the receive component 1602 in a transceiver.

[0176] The receiving component 1602 can receive a first communication from a transmitting UE on the PSSCH. The feedback component 1608 and the transmitting component 1604 can transmit feedback for the first communication on the PSFCH. The receiving component 1602 can receive a second communication from the transmitting UE, wherein the second communication is scheduled according to a rule for overlapping or ordering communications associated with one or more HARQ IDs on the PSSCH. The transmitting component 1604 can transmit feedback for the second communication on the PSFCH.

[0177] Fig.16 The number and arrangement of components shown in are provided as examples. In practice, there may be Fig.16 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Fig.16 Two or more components shown in may be implemented in a single component, or Fig.16 The single component shown in can be implemented as multiple distributed components. Additionally or alternatively, Fig.16 A set (one or more) of components shown in can perform the operations described as being Fig.16 One or more functions performed by another set of components shown in FIG.

[0178] The foregoing 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 are possible in light of the above disclosure or may be acquired from practice of the various aspects.

[0179] The following provides an overview of some aspects of the disclosure:

[0180] Aspect 1: A method for wireless communication performed by a user equipment (UE), comprising: receiving a first downlink control information (DCI) for scheduling a first communication on a physical sidelink shared channel (PSSCH) and a second DCI for scheduling a second communication on the PSSCH from a base station on an access link, wherein the first communication and the second communication are scheduled according to a rule for overlapping or sorting communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; and sending the scheduled first communication and the second communication.

[0181] Aspect 2: The method according to aspect 1, wherein the rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

[0182] Aspect 3: A method according to Aspect 1, wherein the rule specifies that if the HARQ ID used for the first communication is different from the HARQ ID used for the second communication, and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, then the first communication and the second communication can overlap in time on the PSSCH.

[0183] Aspect 4: The method according to any one of aspects 1-3, wherein feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after the first communication and before the second communication.

[0184] Aspect 5: The method according to any one of aspects 1-3, wherein feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that: the first communication is after the second DCI, and the second communication is after the first communication.

[0185] Aspect 6: The method according to any one of aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after sending feedback for the first communication to the base station.

[0186] Aspect 7: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies: the second DCI is after the first communication and before feedback for the first communication is sent to the base station, and the second communication is after the feedback for the first communication is sent to the base station.

[0187] Aspect 8: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after feedback for the first communication is received from a receiving UE that receives the first communication, or after the feedback for the first communication is sent to the base station.

[0188] Aspect 9: A method according to any one of aspects 1-3, wherein feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that: the first communication is after the second DCI, and the second communication is after the first communication.

[0189] Aspect 10: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that feedback for the first communication is to be sent to the base station before feedback for the second communication is sent to the base station.

[0190] Aspect 11: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies: feedback for the first communication is to be sent by the receiving UE that receives the first communication to the base station before feedback for the second communication is sent by the receiving UE that receives the second communication to the base station.

[0191] Aspect 12: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second communication is after feedback for the first communication is received from a receiving UE that receives the first communication on a physical sidelink feedback channel.

[0192] Aspect 13: A method according to any one of Aspects 1-3, wherein feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that the second communication is received before feedback for the first communication is received on a physical sidelink feedback channel from a receiving UE that receives the first communication.

[0193] Aspect 14: A method according to any one of Aspects 1-3, wherein feedback and early listen-before-talk (LBT) reporting are enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that if LBT fails before sending the first communication, the second DCI is not received until an early LBT report is sent to the base station.

[0194] Aspect 15: The method according to any one of aspects 1-14, wherein the UE is configured with multiple resource pools, and wherein the rule is applied across the multiple resource pools.

[0195] Aspect 16: The method according to any one of aspects 1-14, wherein the UE is configured with multiple resource pools, and wherein the rule is applied for each resource pool.

[0196] Aspect 17: A method of wireless communication performed by a base station, comprising: sending a first downlink control information (DCI) to a user equipment (UE) on an access link for scheduling a first communication to be sent by the UE on a physical sidelink shared channel (PSSCH) and a second DCI for scheduling a second communication to be sent by the UE on the PSSCH, wherein the first DCI and the second DCI are sent and scheduled according to a rule for overlapping or sorting communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; and the first DCI and the second DCI are sent according to the rule.

[0197] Aspect 18: The method according to aspect 17, wherein the rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

[0198] Aspect 19: A method according to Aspect 17, wherein the rule specifies that if the HARQ ID used for the first communication is different from the HARQ ID used for the second communication, and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, then the first communication and the second communication can overlap in time on the PSSCH.

[0199] Aspect 20: The method of aspect 17, wherein feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after the first communication and before the second communication.

[0200] Aspect 21: The method of aspect 17, wherein feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

[0201] Aspect 22: The method of aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after feedback is received from the UE for the first communication.

[0202] Aspect 23: A method according to Aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies: the second DCI is after the first communication and before feedback for the first communication is received from the UE, and the second communication is after the feedback for the first communication is received from the UE.

[0203] Aspect 24: A method according to Aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies: the second DCI is received by the UE after feedback for the first communication is received from a receiving UE that receives the first communication, or after the feedback for the first communication is received by the base station.

[0204] Aspect 25: The method according to aspect 17, wherein feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that: the first communication is after the second DCI, and the second communication is after the first communication.

[0205] Aspect 26: A method according to aspect 17, wherein feedback is enabled and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that feedback for the first communication is to be received from the UE before feedback for the second communication is received from the UE.

[0206] Aspect 27: A method according to Aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies: feedback for the first communication is to be received from the receiving UE that receives the first communication before feedback for the second communication is received by the receiving UE that receives the second communication.

[0207] Aspect 28: A method according to Aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second communication is after the UE receives feedback for the first communication from a receiving UE that receives the first communication on a physical sidelink feedback channel.

[0208] Aspect 29: A method according to Aspect 17, wherein feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that the second communication is before the UE receives feedback for the first communication from a receiving UE that receives the first communication on a physical sidelink feedback channel.

[0209] Aspect 30: A method according to Aspect 17, wherein feedback and early listen-before-talk (LBT) reporting are enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that if LBT fails before sending the first communication, the second DCI is not sent until an early LBT report is received from the UE.

[0210] Aspect 31: A method of wireless communication performed by a user equipment (UE), comprising: receiving a first communication from a transmitting UE on a physical sidelink shared channel (PSSCH); sending feedback for the first communication on a physical sidelink feedback channel (PSFCH); and receiving a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; and sending feedback for the second communication on the PSFCH.

[0211] Aspect 32: The method of aspect 31, wherein the first communication and the second communication are for the same HARQ ID, and wherein the rule specifies that the second communication is to be received after sending feedback for the first communication.

[0212] Aspect 33: The method of aspect 31, wherein the first communication and the second communication are for different HARQ IDs, and wherein the rule specifies that the second communication is to be received before sending feedback for the first communication.

[0213] Aspect 34: The method according to Aspect 1 also includes: receiving a third communication from a transmitting UE on a physical sidelink shared channel (PSSCH); sending feedback for the third communication on a physical sidelink feedback channel (PSFCH); and receiving a fourth communication from the transmitting UE, the fourth communication being scheduled according to a rule for overlapping or sorting communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; and sending feedback for the fourth communication on the PSFCH.

[0214] Aspect 35: The method according to aspect 34, wherein the third communication and the fourth communication are for the same HARQ ID, and wherein the rule specifies that the fourth communication is to be received after sending feedback for the third communication.

[0215] Aspect 36: The method of aspect 34, wherein the third communication and the fourth communication are for different HARQ IDs, and wherein the rule specifies that the fourth communication is to be received before sending feedback for the third communication.

[0216] Aspect 37: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 1 to 36.

[0217] Aspect 38: 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 according to one or more of aspects 1 to 36.

[0218] Aspect 39: An apparatus for wireless communication, comprising: at least one unit for performing the method according to one or more of aspects 1-36.

[0219] Aspect 40: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 36.

[0220] Aspect 41: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 36.

[0221] As used herein, the term "component" is intended to be broadly interpreted as hardware or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, processes and / or functions and other examples. As used herein, processors are implemented with a combination of hardware and / or hardware and software. It will be clear that the system or method described herein can be implemented by a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code for implementing these systems and / or methods does not limit various aspects. Therefore, the operation and performance of these systems and / or methods are described without reference to specific software codes--it should be understood that the software and hardware for implementing these systems and / or methods can be designed at least in part based on the description herein.

[0222] 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.

[0223] Although the combination of features is set forth in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many features in these features can be combined in a manner that is not specifically set forth in the claims and / or is not specifically disclosed in the specification. Although each dependent claim listed below may directly only rely on a claim, the disclosure of various aspects includes each dependent claim and each other claim combination in the claim set. As used herein, the phrase referring to "at least one of" in the list of items refers to any combination of these items (it includes a single member). For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc or any other sorting of a, b and c).

[0224] Elements, actions or instructions used herein should not be interpreted as critical or essential, unless clearly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more projects, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more projects connected with the article "the" mentioned, and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more projects (for example, related projects, unrelated projects, or the combination of related projects and unrelated projects), and can be used interchangeably with "one or more". In the case of being intended for only one project, phrases "only one" or similar languages ​​are used. In addition, as used herein, the terms "has", "have", "having" etc. are intended to be open terms. Further, the phrase "based on" is intended to mean "based on at least in part", unless otherwise clearly stated. Furthermore, as used herein, the term "or" when used in a series is intended to be inclusive and may be used interchangeably with "and / or" unless expressly stated otherwise (e.g., if used in conjunction with "either" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, configured to: Receiving, from a base station on an access link, first downlink control information (DCI) scheduling a first communication on a physical sidelink shared channel (PSSCH) and second DCI scheduling a second communication on the PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; as well as The scheduled first communication and the second communication are transmitted.

2. The UE according to claim 1, wherein: The rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

3. The UE according to claim 1, wherein: The rule specifies that if the HARQ ID for the first communication is different from the HARQ ID for the second communication and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, the first communication and the second communication can overlap in time on the PSSCH.

4. The UE according to claim 1, wherein: Feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after the first communication and before the second communication.

5. The UE according to claim 1, wherein: Feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

6. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after sending feedback for the first communication to the base station.

7. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after the first communication and before sending feedback for the first communication to the base station, and the second communication is after sending the feedback for the first communication to the base station.

8. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after feedback for the first communication is received from a receiving UE that receives the first communication, or after the feedback for the first communication received from the receiving UE is sent to the base station.

9. The UE according to claim 1, wherein: Feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

10. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that feedback for the first communication is to be sent to the base station before feedback for the second communication is sent to the base station.

11. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that before the receiving UE receiving the second communication sends feedback for the second communication to the base station, the receiving UE receiving the first communication sends feedback for the first communication to the base station.

12. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second communication is after receiving feedback for the first communication from a receiving UE that received the first communication on a physical sidelink feedback channel.

13. The UE according to claim 1, wherein: Feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that the second communication is before feedback for the first communication is received on a physical sidelink feedback channel from a receiving UE that received the first communication.

14. The UE according to claim 1, wherein: Feedback and early listen-before-talk (LBT) reporting are enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that if LBT fails before sending the first communication, the second DCI is not received until after an early LBT report is sent to the base station.

15. The UE according to claim 1, wherein: The UE is configured with a plurality of resource pools, and wherein the rule is applied across the plurality of resource pools.

16. The UE according to claim 1, wherein: The UE is configured with a plurality of resource pools, and wherein the rule is applied for each resource pool.

17. A base station for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, configured to: Sending to a user equipment (UE) on an access link first downlink control information (DCI) scheduling a first communication to be sent by the UE on a physical sidelink shared channel (PSSCH) and second DCI scheduling a second communication to be sent by the UE on the PSSCH, wherein the first DCI and the second DCI are sent and scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; as well as The first DCI and the second DCI are sent according to the rule.

18. The base station according to claim 17, wherein: The rule specifies that the first communication and the second communication do not overlap in time on the PSSCH.

19. The base station according to claim 17, wherein: The rule specifies that if the HARQ ID for the first communication is different from the HARQ ID for the second communication and if the receiving UE receiving the first communication is different from the receiving UE receiving the second communication, the first communication and the second communication can overlap in time on the PSSCH.

20. The base station according to claim 17, wherein: Feedback is disabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies: The second DCI is after the first communication and before the second communication; or The first communication follows the second DCI, and the second communication follows the first communication.

21. The base station according to claim 17, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies: The second DCI is after receiving feedback for the first communication from the UE; or The second DCI is after the first communication and before feedback is received from the UE for the first communication, and the second communication is after the feedback is received from the UE for the first communication.

22. The base station according to claim 17, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second DCI is after the UE receives feedback for the first communication from a receiving UE that receives the first communication, or after the base station receives the feedback for the first communication.

23. The base station according to claim 17, wherein: Feedback is disabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies that the first communication follows the second DCI, and the second communication follows the first communication.

24. The base station according to claim 17, wherein: Feedback is enabled, and the first DCI and the second DCI are for different HARQ IDs, and wherein the rule specifies: Before receiving feedback for the second communication from the UE, receiving feedback for the first communication from the UE; Before receiving the feedback for the second communication by the receiving UE receiving the second communication, receiving the feedback for the first communication from the receiving UE receiving the first communication; or The second communication is preceded by receipt by the UE of feedback for the first communication on a physical sidelink feedback channel from the receiving UE that received the first communication.

25. The base station according to claim 17, wherein: Feedback is enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that the second communication is after feedback for the first communication is received by the UE on a physical sidelink feedback channel from a receiving UE that received the first communication.

26. The base station according to claim 17, wherein: Feedback and early listen-before-talk (LBT) reporting are enabled, and the first DCI and the second DCI are for the same HARQ ID, and wherein the rule specifies that if LBT fails before sending the first communication, the second DCI is not sent until an early LBT report is received from the UE.

27. A user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors, coupled to the memory, configured to: receiving a first communication from a transmitting UE on a physical sidelink shared channel (PSSCH); sending feedback for the first communication on a physical sidelink feedback channel (PSFCH); as well as receiving a second communication from the transmitting UE, the second communication being scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; as well as Feedback for the second communication is sent on the PSFCH.

28. The UE according to claim 27, wherein: The first communication and the second communication are for the same HARQ ID, and wherein the rule specifies that the second communication is to be received after sending feedback for the first communication.

29. The UE according to claim 27, wherein: The first communication and the second communication are for different HARQ IDs, and wherein the rule specifies that the second communication is to be received before sending feedback for the first communication.

30. A method of wireless communication performed by a user equipment (UE), comprising: Receiving, from a base station on an access link, first downlink control information (DCI) scheduling a first communication on a physical sidelink shared channel (PSSCH) and second DCI scheduling a second communication on the PSSCH, wherein the first communication and the second communication are scheduled according to a rule for overlapping or ordering communications associated with one or more hybrid automatic repeat request (HARQ) identifiers (IDs) on the PSSCH; and The scheduled first communication and the second communication are transmitted.

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