Sidelink feedback channel occasions in resource block set
Patent Information
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2023-07-28
- Publication Date
- 2026-06-10
Smart Images

Figure CN2023109775_06022025_PF_FP_ABST
Abstract
Description
SIDELINK FEEDBACK CHANNEL OCCASIONS IN RESOURCE BLOCK SET
[0001] FIELD OF THE DISCLOSURE
[0002] Aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for using sidelink feedback channel occasions in a resource block set.BACKGROUND
[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or the like) . Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) . LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
[0004] A wireless network may include one or more network nodes that support communication for wireless communication devices, such as a user equipment (UE) or multiple UEs. A UE may communicate with a network node via downlink communications and uplink communications. “Downlink” (or “DL” ) refers to a communication link from the network node to the UE, and “uplink” (or “UL” ) refers to a communication link from the UE to the network node. Some wireless networks may support device-to-device communication, such as via a local link (e.g., a sidelink (SL) , a wireless local area network (WLAN) link, and / or a wireless personal area network (WPAN) link, among other examples) .
[0005] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate on a municipal, national, regional, and / or global level. New Radio (NR) , which may be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink, using CP-OFDM and / or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink, as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR, and other radio access technologies remain useful.SUMMARY
[0006] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE) . The method may include receiving a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set. The method may include transmitting a first physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0007] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving a PSSCH communication in an RB set. The method may include transmitting, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source identifier (ID) , a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0008] Some aspects described herein relate to a method of wireless communication performed by a UE. The method may include receiving a PSSCH communication. The method may include transmitting a PSFCH communication in a dedicated physical resource block (PRB) resource with a guard band that is at an edge of a common PRB.
[0009] Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be individually or collectively configured to receive a PSSCH communication in an RB set. The one or more processors may be individually or collectively configured to transmit a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0010] Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be individually or collectively configured to receive a PSSCH communication in an RB set. The one or more processors may be individually or collectively configured to transmit, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0011] Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be individually or collectively configured to receive a PSSCH communication. The one or more processors may be individually or collectively configured to transmit a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB.
[0012] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive a PSSCH communication in an RB set. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0013] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive a PSSCH communication in an RB set. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0014] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive a PSSCH communication. The set of instructions, when executed by one or more processors of the UE, may cause the UE to transmit a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB.
[0015] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a PSSCH communication in an RB set. The apparatus may include means for transmitting a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0016] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a PSSCH communication in an RB set. The apparatus may include means for transmitting, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving user equipment ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0017] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a PSSCH communication. The apparatus may include means for transmitting a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB.
[0018] Aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, UE, base station, network entity, network node, wireless communication device, and / or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
[0019] The foregoing has outlined rather broadly the features and technical advantages of examples according to the disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. Characteristics of the concepts disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes of illustration and description, and not as a definition of the limits of the claims.
[0020] While aspects are described in the present disclosure by illustration to some examples, those skilled in the art will understand that such aspects may be implemented in many different arrangements and scenarios. Techniques described herein may be implemented using different platform types, devices, systems, shapes, sizes, and / or packaging arrangements. For example, some aspects may be implemented via integrated chip embodiments or other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices) . Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating described aspects and features may include additional components and features for implementation and practice of claimed and described aspects. For example, transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or summers) . It is intended that aspects described herein may be practiced in a wide variety of devices, components, systems, distributed arrangements, and / or end-user devices of varying size, shape, and constitution.BRIEF DESCRIPTION OF THE DRAWINGS
[0021] So that the above-recited features of the present disclosure can be understood in detail, a more particular description, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.
[0022] Fig. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.
[0023] Fig. 2 is a diagram illustrating an example of a network node in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.
[0024] Fig. 3 is a diagram illustrating an example of sidelink communications, in accordance with the present disclosure.
[0025] Fig. 4 is a diagram illustrating an example of sidelink communications and access link communications, in accordance with the present disclosure.
[0026] Fig. 5 is a diagram illustrating an example of selecting sidelink resources, in accordance with the present disclosure.
[0027] Fig. 6 is a diagram illustrating an example of partitioned physical sidelink feedback channel (PSFCH) occasions, in accordance with the present disclosure.
[0028] Fig. 7 is a diagram illustrating an example of transmitting PSFCH communications, in accordance with the present disclosure.
[0029] Fig. 8 is a diagram illustrating an example of PSFCH occasion mapping, in accordance with the present disclosure.
[0030] Fig. 9 is a diagram illustrating an example of transmitting PSFCH communications, in accordance with the present disclosure.
[0031] Fig. 10 is a diagram illustrating an example of guard band resource elements (REs) , in accordance with the present disclosure.
[0032] Fig. 11 is a diagram illustrating an example of a guard band, in accordance with the present disclosure.
[0033] Fig. 12 is a diagram illustrating an example of guard band resource elements (REs) , in accordance with the present disclosure.
[0034] Fig. 13 is a diagram illustrating an example of transmitting a PSFCH communication with a guard band, in accordance with the present disclosure.
[0035] Fig. 14 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
[0036] Fig. 15 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
[0037] Fig. 16 is a diagram illustrating an example process performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure.
[0038] Fig. 17 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.DETAILED DESCRIPTION
[0039] Various aspects relate generally to wireless communication and more particularly to sidelink communications. Some aspects more specifically relate to a first user equipment (UE) transmitting communications to, and receiving feedback from, a second UE. After the first UE transmits a physical sidelink shared channel (PSSCH) communication, there may be multiple physical sidelink feedback channel (PSFCH) opportunities (occasions) for transmission. Different PSFCH occasions may be mapped to different resource sets. A PSFCH resource set may include a set of physical resource blocks (PRBs) or a resource block (RB) set. PSFCH occasions in different RB sets may not help with the use and continuation of channel occupancy times. In some aspects, PSFCH occasions may be located within the same RB set (s) occupied by the PSSCH communications. However, it has not been specified how the PSFCH resource pool is to be partitioned for multiple PSFCH occasions that are in the same RB set.
[0040] According to various aspects described herein, different PSFCH occasions may be frequency division multiplexed (FDMed) and evenly partitioned in PSFCH PRBs within each RB set. PSFCH occasions may be evenly partitioned by dividing a frequency bandwidth or PRBs evenly among PSFCH occasions in an RB set that is the same RB set in which the PSSCH communication was received. Each PSFCH occasion may have the same bandwidth or quantity of PRBs.
[0041] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, by evenly partitioning PSFCH occasions in a slot of an RB set (same RB set of the PSSCH communication) , the UE may optimize PSFCH resources. Optimizing PSFCH resources conserves signaling resources.
[0042] Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0043] Several aspects of telecommunication systems will now be presented with reference to various apparatuses and techniques. These apparatuses and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, or the like (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or combinations thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0044] While aspects may be described herein using terminology commonly associated with a 5G or New Radio (NR) radio access technology (RAT) , aspects of the present disclosure can be applied to other RATs, such as a 3G RAT, a 4G RAT, and / or a RAT subsequent to 5G (e.g., 6G) .
[0045] Fig. 1 is a diagram illustrating an example of a wireless network 100, in accordance with the present disclosure. The wireless network 100 may be or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE) ) network, among other examples. The wireless network 100 may include one or more network nodes 110 (shown as a network node 110a, a network node 110b, a network node 110c, and a network node 110d) , a UE 120 or multiple UEs 120 (shown as a UE 120a, a UE 120b, a UE 120c, a UE 120d, and a UE 120e) , and / or other entities. A network node 110 is a network node that communicates with UEs 120. As shown, a network node 110 may include one or more network nodes. In some aspects, a network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit) . As another example, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs) , one or more distributed units (DUs) , or one or more radio units (RUs) ) .
[0046] In some examples, a network node 110 is or includes a network node that communicates with UEs 120 via a radio access link, such as an RU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a fronthaul link or a midhaul link, such as a DU. In some examples, a network node 110 is or includes a network node that communicates with other network nodes 110 via a midhaul link or a core network via a backhaul link, such as a CU. In some examples, a network node 110 (such as an aggregated network node 110 or a disaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. A network node 110 may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G) , a gNB (e.g., in 5G) , an access point, a transmission reception point (TRP) , a DU, an RU, a CU, a mobility element of a network, a core network node, a network element, a network equipment, a RAN node, or a combination thereof. In some examples, the network nodes 110 may be interconnected to one another or to one or more other network nodes 110 in the wireless network 100 through various types of fronthaul, midhaul, and / or backhaul interfaces, such as a direct physical connection, an air interface, or a virtual network, using any suitable transport network.
[0047] In some examples, a network node 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP) , the term “cell” can refer to a coverage area of a network node 110 and / or a network node subsystem serving this coverage area, depending on the context in which the term is used. A network node 110 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 120 with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 having association with the femto cell (e.g., UEs 120 in a closed subscriber group (CSG) ) . A network node 110 for a macro cell may be referred to as a macro network node. A network node 110 for a pico cell may be referred to as a pico network node. A network node 110 for a femto cell may be referred to as a femto network node or an in-home network node. In the example shown in Fig. 1, the network node 110a may be a macro network node for a macro cell 102a, the network node 110b may be a pico network node for a pico cell 102b, and the network node 110c may be a femto network node for a femto cell 102c. A network node may support one or multiple (e.g., three) cells. In some examples, a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a network node 110 that is mobile (e.g., a mobile network node) .
[0048] In some aspects, the terms “base station” or “network node” may refer to an aggregated base station, a disaggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some aspects, “base station” or “network node” may refer to a CU, a DU, an RU, a Near-Real Time (Near-RT) RAN Intelligent Controller (RIC) , or a Non-Real Time (Non-RT) RIC, or a combination thereof. In some aspects, the terms “base station” or “network node” may refer to one device configured to perform one or more functions, such as those described herein in connection with the network node 110. In some aspects, the terms “base station” or “network node” may refer to a plurality of devices configured to perform the one or more functions. For example, in some distributed systems, each of a quantity of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to duplicate performance of at least a portion of the function, and the terms “base station” or “network node” may refer to any one or more of those different devices. In some aspects, the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. In some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may include more than one base station.
[0049] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive a transmission of data from an upstream node (e.g., a network node 110 or a UE 120) and send a transmission of the data to a downstream node (e.g., a UE 120 or a network node 110) . A relay station may be a UE 120 that can relay transmissions for other UEs 120. In the example shown in Fig. 1, the network node 110d (e.g., a relay network node) may communicate with the network node 110a (e.g., a macro network node) and the UE 120d in order to facilitate communication between the network node 110a and the UE 120d. A network node 110 that relays communications may be referred to as a relay station, a relay base station, a relay network node, a relay node, a relay, or the like.
[0050] The wireless network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, or the like. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. In some aspects, macro network nodes may have a high transmit power level (e.g., 5 to 40 watts) whereas pico network nodes, femto network nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts) .
[0051] A network controller 130 may couple to or communicate with a set of network nodes 110 and may provide coordination and control for these network nodes 110. The network controller 130 may communicate with the network nodes 110 via a backhaul communication link or a midhaul communication link. The network nodes 110 may communicate with one another directly or indirectly via a wireless or wireline backhaul communication link. In some aspects, the network controller 130 may be a CU or a core network device, or may include a CU or a core network device.
[0052] The UEs 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. A UE 120 may include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. A UE 120 may 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, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet) ) , an entertainment device (e.g., a music device, a video device, and / or a satellite radio) , a vehicular component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, a UE function of a network node, and / or any other suitable device that is configured to communicate via a wireless or wired medium.
[0053] Some UEs 120 may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs. An MTC UE and / or an eMTC UE may include, for example, a robot, an unmanned aerial vehicle, a remote device, a sensor, a meter, a monitor, and / or a location tag, that may communicate with a network node, another device (e.g., a remote device) , or some other entity. Some UEs 120 may be considered Internet-of-Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered a Customer Premises Equipment. A UE 120 may be included inside a housing that houses components of the UE 120, such as processor components and / or memory components. In some examples, the processor components and the memory components may be coupled together. In some aspects, the processor components (e.g., one or more processors) and the memory components (e.g., a memory) may be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.
[0054] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a particular RAT and may operate on one or more frequencies. A RAT may be referred to as a radio technology, an air interface, or the like. A frequency may be referred to as a carrier, a frequency channel, or the like. Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.
[0055] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using a network node 110 as an intermediary to communicate with one another) . For example, the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, or a vehicle-to-pedestrian (V2P) protocol) , and / or a mesh network. In such examples, a UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by the network node 110.
[0056] Devices of the wireless network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, channels, or the like. In some aspects, devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . It should be understood that although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “Sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0057] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified an operating band for these mid-band frequencies as frequency range designation FR3 (7.125 GHz –24.25 GHz) . Frequency bands falling within FR3 may inherit FR1 characteristics and / or FR2 characteristics, and thus may effectively extend features of FR1 and / or FR2 into mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. In some aspects, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz –71 GHz) , FR4 (52.6 GHz –114.25 GHz) , and FR5 (114.25 GHz –300 GHz) . Each of these higher frequency bands falls within the EHF band.
[0058] With the above examples in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like, if used herein, may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like, if used herein, may broadly represent frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and techniques described herein are applicable to those modified frequency ranges.
[0059] In some aspects, a UE (e.g., a UE 120) may include a communication manager 140. As described in more detail elsewhere herein, the communication manager 140 may receive a PSSCH communication in an RB set. The communication manager 140 may transmit a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0060] In some aspects, the communication manager 140 may receive a PSSCH communication in an RB set. The communication manager 140 may transmit a physical PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source identifier (ID) , a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0061] In some aspects, the communication manager 140 may receive a PSSCH communication. The communication manager 140 may transmit a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB. Additionally, or alternatively, the communication manager 140 may perform one or more other operations described herein.
[0062] As indicated above, Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
[0063] Fig. 2 is a diagram illustrating an example 200 of a network node 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure. The network node 110 may be equipped with a set of antennas 234a through 234t, such as T antennas (T ≥ 1) . The UE 120 may be equipped with a set of antennas 252a through 252r, such as R antennas (R ≥ 1) . The network node 110 of example 200 includes one or more radio frequency components, such as antennas 234 and a modem 232. In some examples, a network node 110 may include an interface, a communication component, or another component that facilitates communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs, or one or more DUs.
[0064] At the network node 110, a transmit processor 220 may receive data, from a data source 212, intended for the UE 120 (or a set of UEs 120) . The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE 120 based at least in part on one or more channel quality indicators (CQIs) received from that UE 120. The network node 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS (s) selected for the UE 120 and may provide data symbols for the UE 120. The transmit processor 220 may 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 generate reference symbols for reference signals (e.g., a cell-specific reference signal (CRS) or a demodulation reference signal (DMRS) ) and synchronization signals (e.g., a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) ) . A transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and / or the reference symbols, if applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) , shown as modems 232a through 232t. In some aspects, each output symbol stream may be provided to a modulator component (shown as MOD) of a modem 232. Each modem 232 may use a respective modulator component to process a respective output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modem 232 may further use a respective modulator component to process (e.g., convert to analog, amplify, filter, and / or upconvert) the output sample stream to obtain a downlink signal. The modems 232a through 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) , shown as antennas 234a through 234t.
[0065] At the UE 120, a set of antennas 252 (shown as antennas 252a through 252r) may receive the downlink signals from the network node 110 and / or other network nodes 110 and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) , shown as modems 254a through 254r. In some aspects, each received signal may be provided to a demodulator component (shown as DEMOD) of a modem 254. Each modem 254 may use a respective demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) a received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modems 254, may perform MIMO detection on the received symbols if applicable, and may provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to a data sink 260, and may 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. A 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, among other examples. In some examples, one or more components of the UE 120 may be included in a housing 284.
[0066] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the network node 110 via the communication unit 294.
[0067] One or more antennas (e.g., antennas 234a through 234t and / or antennas 252a through 252r) may include, or may be included within, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, among other examples. An antenna panel, an antenna group, a set of antenna elements, and / or an antenna array may include one or more antenna elements (within a single housing or multiple housings) , a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmission and / or reception components, such as one or more components of Fig. 2.
[0068] 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 that include RSRP, RSSI, RSRQ, and / or CQI) from the controller / processor 280. The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modems 254 (e.g., for DFT-s-OFDM or CP-OFDM) , and transmitted to the network node 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of the antenna (s) 252, the modem (s) 254, the MIMO detector 256, the receive processor 258, the transmit processor 264, and / or the TX MIMO processor 266. The transceiver may be used by a processor (e.g., the controller / processor 280) and the memory 282 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 3-17) .
[0069] At the network node 110, the uplink signals from UE 120 and / or other UEs may be received by the antennas 234, processed by the modem 232 (e.g., a demodulator component, shown as DEMOD, of the modem 232) , detected by a MIMO detector 236 if applicable, and further processed by a 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 a data sink 239 and provide the decoded control information to the controller / processor 240. The network node 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, the modem 232 of the network node 110 may include a modulator and a demodulator. In some examples, the network node 110 includes a transceiver. The transceiver may include any combination of the antenna (s) 234, the modem (s) 232, the MIMO detector 236, the receive processor 238, the transmit processor 220, and / or the TX MIMO processor 230. The transceiver may be used by a processor (e.g., the controller / processor 240) and the memory 242 to perform aspects of any of the methods described herein (e.g., with reference to Figs. 3-17) .
[0070] A controller / processor of a network entity (e.g., a controller / processor 240 of the network node 110) , the controller / processor 280 of the UE 120, and / or any other component (s) of Fig. 2 may perform one or more techniques associated with using PSFCH occasions, as described in more detail elsewhere herein. In some aspects, the controller / processor 240 of the network node 110, the controller / processor 280 of the UE 120, and / or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 1400 of Fig. 14, process 1500 of Fig. 15, process 1600 of Fig. 16, and / or other processes as described herein. The memory 242 and the memory 282 may store data and program codes for the network node 110 and the UE 120, respectively. In some examples, the memory 242 and / or the 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. In some aspects, the one or more instructions, when executed (e.g., directly, or after compiling, converting, and / or interpreting) by one or more processors of the network node 110 and / or the UE 120, may cause the one or more processors, the UE 120, and / or the network node 110 to perform or direct operations of, for example, process 1400 of Fig. 14, process 1500 of Fig. 15, process 1600 of Fig. 16, and / or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.
[0071] In some aspects, a UE (e.g., a UE 120) includes means for receiving a PSSCH communication in an RB set; and / or means for transmitting a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0072] In some aspects, a UE (e.g., a UE 120) includes means for receiving a PSSCH communication in an RB set; and / or means for transmitting, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0073] In some aspects, a UE (e.g., a UE 120) includes means for receiving a PSSCH communication; and / or means for transmitting a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.
[0074] In some aspects, an individual processor may perform all of the functions described as being performed by the one or more processors. In some aspects, one or more processors may collectively perform a set of functions. In some aspects, a first set of (one or more) processors of the one or more processors may perform a first function described as being performed by the one or more processors, and a second set of (one or more) processors of the one or more processors may perform a second function described as being performed by the one or more processors. The first set of processors and the second set of processors may be the same set of processors or may be different sets of processors. Reference to “one or more processors” should be understood to refer to any one or more of the processors described in connection with Fig. 2. Reference to “one or more memories” should be understood to refer to any one or more memories of a corresponding device, such as the memory described in connection with Fig. 2. In some aspects, functions described as being performed by one or more memories can be performed by the same subset of the one or more memories or different subsets of the one or more memories.
[0075] While blocks in Fig. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. In some aspects, the functions 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.
[0076] As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
[0077] Deployment of communication systems, such as 5G NR systems, may be arranged in multiple manners with various components or constituent parts. In a 5G NR system, or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element, a base station, or a network equipment may be implemented in an aggregated or disaggregated architecture. In some aspects, a base station (such as a Node B (NB) , an evolved NB (eNB) , an NR base station, a 5G NB, an access point (AP) , a TRP, or a cell, among other examples) , or one or more units (or one or more components) performing base station functionality, may be implemented as an aggregated base station (also known as a standalone base station or a monolithic base station) or a disaggregated base station. “Network entity” or “network node” may refer to a disaggregated base station, or to one or more units of a disaggregated base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof) .
[0078] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit) . A disaggregated base station (e.g., a disaggregated network node) may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more CUs, one or more DUs, or one or more RUs) . In some examples, a CU may be implemented within a network node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed throughout one or multiple other network nodes. The DUs may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU also can be implemented as virtual units, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples.
[0079] Base station-type operation or network design may consider aggregation characteristics of base station functionality. In some aspects, disaggregated base stations may be utilized in an IAB network, an open radio access network (O-RAN (such as the network configuration sponsored by the O-RAN Alliance) ) , or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN) ) to facilitate scaling of communication systems by separating base station functionality into one or more units that can be individually deployed. A disaggregated base station may include functionality implemented across two or more units at various physical locations, as well as functionality implemented for at least one unit virtually, which can enable flexibility in network design. The various units of the disaggregated base station can be configured for wired or wireless communication with at least one other unit of the disaggregated base station.
[0080] Fig. 3 is a diagram illustrating an example 300 of sidelink communications, in accordance with the present disclosure.
[0081] As shown in Fig. 3, a first UE 305-1 may communicate with a second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. The UEs 305-1 and 305-2 may communicate using the one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (e.g., which may include V2V communications, V2I communications, and / or V2P communications) and / or mesh networking. In some aspects, the UEs 305 (e.g., UE 305-1 and / or UE 305-2) may correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 may use a PC5 interface and / or may operate in a high frequency band (e.g., the 5.9 GHz band) . Additionally, or alternatively, the UEs 305 may synchronize timing of transmission time intervals (TTIs) (e.g., frames, subframes, slots, or symbols) using global navigation satellite system (GNSS) timing.
[0082] As further shown in Fig. 3, the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a PSSCH 320, and / or a PSFCH 325. The PSCCH 315 may be used to communicate control information, similar to a physical downlink control channel (PDCCH) and / or a physical uplink control channel (PUCCH) used for cellular communications with a network node 110 via an access link or an access channel. The PSSCH 320 may be used to communicate data, similar to a physical downlink shared channel (PDSCH) and / or a physical uplink shared channel (PUSCH) used for cellular communications with a network node 110 via an access link or an access channel. In some aspects, the PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information used for sidelink communications, such as one or more resources (e.g., time resources, frequency resources, and / or spatial resources) where a transport block (TB) 335 may be carried on the PSSCH 320. The TB 335 may include data. The PSFCH 325 may be used to communicate sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgement or negative acknowledgement (ACK / NACK) information) , transmit power control (TPC) , and / or a scheduling request (SR) .
[0083] Although shown on the PSCCH 315, in some aspects, the SCI 330 may include multiple communications in different stages, such as a first stage SCI (SCI-1) and a second stage SCI (SCI-2) . The SCI-1 may be transmitted on the PSCCH 315. The SCI-2 may be transmitted on the PSSCH 320. The SCI-1 may include, for example, an indication of one or more resources (e.g., time resources, frequency resources, and / or spatial resources) on the PSSCH 320, information for decoding sidelink communications on the PSSCH, a quality of service (QoS) priority value, a resource reservation period, a PSSCH DMRS pattern, an SCI format for the SCI-2, a beta offset for the SCI-2, a quantity of PSSCH DMRS ports, and / or an MCS. The SCI-2 may include information associated with data transmissions on the PSSCH 320, such as a HARQ process ID, a new data indicator (NDI) , a source identifier, a destination identifier, and / or a channel state information (CSI) report trigger.
[0084] In some aspects, the one or more sidelink channels 310 may use resource pools. In some aspects, a scheduling assignment (e.g., included in SCI 330) may be transmitted in sub-channels using specific RBs across time. In some aspects, data transmissions (e.g., on the PSSCH 320) associated with a scheduling assignment 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 transmissions are not transmitted on adjacent RBs.
[0085] In some aspects, a UE 305 may operate using a sidelink transmission mode (e.g., Mode 1) where resource selection and / or scheduling is performed by a network node 110 (e.g., a base station, a CU, or a DU) . In some aspects, the UE 305 may receive a grant (e.g., in downlink control information (DCI) or in a radio resource control (RRC) message, such as for configured grants) from the network node 110 (e.g., directly or via one or more network nodes) for sidelink channel access and / or scheduling. In some aspects, a UE 305 may operate using a transmission mode (e.g., Mode 2) where resource selection and / or scheduling is performed by the UE 305 (e.g., rather than a network node 110) . In some aspects, the UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmissions. In some aspects, the UE 305 may measure an RSSI parameter (e.g., a sidelink-RSSI (S-RSSI) parameter) associated with various sidelink channels, may measure an RSRP parameter (e.g., a PSSCH-RSRP parameter) associated with various sidelink channels, and / or may measure an RSRQ parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and may select a channel for transmission of a sidelink communication based at least in part on the measurement (s) .
[0086] Additionally, or alternatively, the UE 305 may perform resource selection and / or scheduling using SCI 330 received in the PSCCH 315, which may indicate occupied resources and / or channel parameters. Additionally, or alternatively, the UE 305 may perform resource selection and / or scheduling by determining a channel busy ratio (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that the UE 305 can use for a particular set of subframes) .
[0087] In the transmission mode where resource selection and / or scheduling is performed by a UE 305, the UE 305 may generate sidelink grants, and may transmit the grants in SCI 330. A 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 to be used for the upcoming sidelink transmission on the PSSCH 320 (e.g., for TBs 335) , one or more subframes to be used for the upcoming sidelink transmission, and / or an MCS to be used for the upcoming sidelink transmission. In some aspects, a UE 305 may generate a sidelink grant that indicates one or more parameters for semi-persistent scheduling (SPS) , such as a periodicity of a 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.
[0088] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with respect to Fig. 3.
[0089] Fig. 4 is a diagram illustrating an example 400 of sidelink communications and access link communications, in accordance with the present disclosure.
[0090] As shown in Fig. 4, a transmitter (Tx) / receiver (Rx) UE 405 and an Rx / Tx UE 410 may communicate with one another via a sidelink, as described above in connection with Fig. 3. As further shown, in some sidelink modes, a network node 110 may communicate with the Tx / Rx UE 405 (e.g., directly or via one or more network nodes) , such as via a first access link. Additionally, or alternatively, in some sidelink modes, the network node 110 may communicate with the Rx / Tx UE 410 (e.g., directly or via one or more network nodes) , such as via a first access link. The Tx / Rx UE 405 and / or the Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as the UE 120 of Fig. 1. 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 network node 110 and a UE 120 (e.g., via a Uu interface) may be referred to as an access link. Sidelink communications may be transmitted via the sidelink, and access link communications may be transmitted via the access link. An access link communication may be either a downlink communication (from a network node 110 to a UE 120) or an uplink communication (from a UE 120 to a network node 110) .
[0091] As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
[0092] Fig. 5 is a diagram illustrating an example 500 of selecting sidelink resources, in accordance with the present disclosure. Example 500 shows a UE 502 (e.g., a UE 120) that may receive communications on a sidelink channel from other UEs, such as UE 504, UE 506, and / or UE 508.
[0093] As described in connection with Fig. 5, UE 504 is a transmitting UE that is transmitting communications to UE 502, which is a receiving UE. UE 504 may use a report from UE 502, which may act as a reporting UE that reports available sidelink resources, preferred sidelink resources, non-preferred sidelink resources, or sidelink resource conflicts. Example 500 shows an availability report from UE 502 to UE 504 and a communication from UE 504 to UE 502. Sidelink mode 2 resource selection may be performed in both a licensed band and an unlicensed band. UE 504 may receive SCI from UE 502 and decode the reservation information that is carried in SCI. If the RSRP of the SCI is larger than a threshold (e.g., availability threshold configured or preconfigured per transmission priority and receive priority pair) , UE 504 may respect this reservation information and exclude the reserved resources in the resource selection window.
[0094] In SL-U, UE 504 may sense the sidelink channel. If UE 504 is to transmit a communication to UE 502, UE 504 may sense the sidelink channel in a sensing window to determine which sidelink resources (e.g., subcarriers, subchannels) are available. UE 504 may use a listen-before-talk (LBT) procedure to sense the channel. The LBT procedure maybe a Type 1 LBT procedure, where UE 504 listens for multiple slots (e.g., 9 milliseconds (ms) ) and uses a counter. A sidelink resource may be considered available if the sidelink resource was clear or had a signal energy (e.g., RSRP) that satisfied an availability threshold (e.g., measured interference or energy on the channel is lower than a maximum decibel-milliwatts (dBm) or dB, RSRP threshold) . The availability threshold may be configured or preconfigured per transmission priority and receive priority pair. UE 504 may measure DMRSs on a PSCCH or a PSSCH, according to a configuration.
[0095] In some aspects, UE 504 may prepare to transmit a communication to UE 502. UE 504 may have already sensed previous sidelink resources and successfully decoded SCI from UE 506 and UE 508. UE 504 may try to reserve sidelink resources, and thus may check the availability of the future sidelink resources reserved by UE 506 and UE 508 by sensing the sidelink channel in the sensing window. UE 504 may measure an RSRP of a signal from UE 508 in sidelink resource 510, and an RSRP of a signal from UE 506 in sidelink resource 512. If an observed RSRP (RSRP projection) satisfies the RSRP threshold (e.g., is lower than a maximum RSRP) , the corresponding sidelink resource may be available for reservations by UE 504. UE 504 may reserve the sidelink resource (which may be a random selection from available resources) . In some aspects, UE 504 may select and reserve sidelink resource 514 for transmission. This may be in a time slot after which UE 506 and UE 508 had used sidelink resources, and UE 504 may have sensed these sidelink resources earlier. UE 504 may select and reserve sidelink resources only upon reaching a threshold level (e.g., 20%, 30%, or 50%availability) . UE 504 may increase or decrease the RSRP threshold as necessary to arrive at the threshold level. UE 504 may select and reserve sidelink resources in the current slot and up to two (or more) future slots. Reservations may be aperiodic or periodic (e.g., SCI signals period between 0 ms and 1000 ms) . Periodic resource reservation may be disabled.
[0096] There may be a resource selection trigger to trigger selection of sidelink resources after a processing time Tproc, 0, and before another processing time Tproc, 1 before a resource selection window from which sidelink resources are available. The resource selection window may be a time window from which sidelink resources may be selected, and the resource selection window may extend for a remaining packet delay budget (PDB) .
[0097] As indicated above, Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
[0098] Fig. 6 is a diagram illustrating an example 600 of partitioned PSFCH occasions, in accordance with the present disclosure.
[0099] After a PSSCH communication is transmitted, there may be multiple PSFCH opportunities for transmission (occasions) that are preconfigured. Each PSFCH occasion may have a different HARQ timeline and may be mapped to different PSFCH resource sets. A PSFCH resource set may include a set of PRBs or an RB set. Resources used for first PSFCH occasions may be restricted to a preconfigured resource set of the resource pool, and second PSFCH occasions may be mapped to a different preconfigured resource set in the resource pool. Different PSFCH occasions may be mapped to different resource sets. That is, in unlicensed sidelink (SL-U) , PSFCH occasions for a PSSCH communication may be located in different RB sets. PSFCH occasions in different RB sets does not help with the use and continuation of channel occupancy times.
[0100] In some aspects, PSFCH occasions may be located within the same RB set (s) occupied by the PSSCH communications. However, it has not been specified how the PSFCH resource pool is to be partitioned for multiple PSFCH occasions that are in the same RB set.
[0101] According to various aspects described herein, different PSFCH occasions may be FDMed and evenly partitioned in PSFCH PRBs within each RB set. PSFCH occasions may be evenly partitioned by dividing a frequency bandwidth or PRBs evenly among PSFCH occasions in an RB set that is the same RB set in which the PSSCH communication was received. Each PSFCH occasion may have the same bandwidth or quantity of PRBs. In some aspects, PSFCH PRBs for each subchannel or slot may be within the RB set that is occupied by the corresponding subchannel.
[0102] Example 600 shows two RB sets (RB set #0 and RB set #1) over multiple subchannels. PSFCH occasions are FDMed in each slot for an RB set. The PSFCH occasions are evenly partitioned, where each PSFCH occasion is of equal size. If there is a remainder of one or more PRBs after the quantity of PRBs is divided by the quantity of PSFCH occasions, the remainder of PRBs may be distributed to some PSFCH occasions or may be unused. The PSFCH occasions may span multiple subchannels.
[0103] Example 600 shows that PSFCH occasion 602 may be a first PSFCH occasion for subchannels #0-#4 (leading subchannel #0) . A UE may receive a PSSCH communication (e.g., in one subchannel, two subchannels, or three subchannels) . The UE may transmit a PSFCH communication (as feedback for the PSSCH communication) in PSFCH occasion 602. PSFCH communications may be repeated. PSFCH occasion 604 may be a second PSFCH occasion for a second PSFCH communication for the PSSCH communication, if needed. PSFCH occasion 606 may be a third PSFCH occasion for the PSSCH communication, if needed. PSFCH occasion 608 may be a fourth PSFCH occasion for the PSSCH communication, if needed. While RB set #0 includes four PSFCH occasions. An RB set may include other quantities of PSFCH occasions.
[0104] Example 600 shows that PSFCH occasion 610 may be a first PSFCH occasion for subchannels #5-#9 (leading subchannel #5) . The UE may transmit a PSFCH communication (as feedback for a PSSCH communication) in PSFCH occasion 610. PSFCH occasion 612 may be a second PSFCH occasion for the PSSCH communication, if needed. PSFCH occasion 614 may be a third PSFCH occasion for the PSSCH communication, if needed. PSFCH occasion 616 may be a fourth PSFCH occasion for the PSSCH communication, if needed.
[0105] By evenly partitioning PSFCH occasions in a slot of an RB set (same RB set of the PSSCH communication) , the UE may optimize PSFCH resources. Optimizing PSFCH resources conserves signaling resources.
[0106] In some aspects, the UE may determine to use a first subchannel of PSFCH to determine an PSFCH resource (e.g., dedicated PRB for PSFCH) based at least in part on a leading subchannel for the PSSCH being a first subchannel for the PSFCH. That is, PRBs corresponding to a PSFCH occasion index may be partitioned into multiple subsets, each subset corresponding to one subchannel / slot. The subset used to transmit the PSFCH communication may correspond to the leading subchannel of the PSSCH communication. In some aspects, if the leading subchannel is four, the UE may use a second PSFCH occasion.
[0107] As indicated above, Fig. 6 is provided as an example. Other examples may differ from what is described with regard to Fig. 6.
[0108] Fig. 7 is a diagram illustrating an example 700 of transmitting PSFCH communications, in accordance with the present disclosure. A UE 710 (e.g., UE 120) may communicate with another UE 720 (e.g., UE 120) on a sidelink communication within a wireless network (e.g., wireless network 100) .
[0109] Example 700 shows the use of evenly partitioned PSFCH occasions. As shown by reference number 725, UE 710 may transmit a PSSCH communication in an RB set. Multiple PSFCH occasions (e.g., first PSFCH occasion, second PSFCH occasion, third PSFCH occasion, fourth PSFCH occasion) may be evenly partitioned in the RB set. As shown by reference number 730, UE 720 may transmit a first PSFCH communication in the first PSFCH occasion. As shown by reference number 735, UE 720 may transmit a second PSFCH communication in a second PSFCH occasion, if necessary. As shown by reference number 740, UE 720 may transmit a third PSFCH communication in a third PSFCH occasion, if necessary. As shown by reference number 745, UE 720 may transmit a fourth PSFCH communication in a fourth PSFCH occasion, if necessary.
[0110] As indicated above, Fig. 7 is provided as an example. Other examples may differ from what is described with regard to Fig. 7.
[0111] Fig. 8 is a diagram illustrating an example 800 of PSFCH occasion mapping, in accordance with the present disclosure.
[0112] PSFCH PRBs for each subchannel / slot may be within the RB set that occupied by a corresponding subchannel for the PSSCH communication. In some aspects, a PSSCH communication may be mapped to PSFCH occasions based at least in part on one or more parameters. The parameters may include a source ID (PID) , a receiving UE member ID (MID) , the quantity of PSFCH occasions (K) in the RB set, and / or the PSFCH occasion index (k, k = 0 ~ (K-1) ) . In some aspects, a PSFCH occasion may be based at least in part on where may be the quantity of PRBs for each subchannel / slot.
[0113] Example 800 shows an example for two UEs with source IDs PID = 10 and PID = 11. K = 4 and Afirst set of four occasions that are mapped based at least in part on a first source ID (PID = 10) , and a second set of four occasions that are mapped based at least in part on a second source ID (PID = 11) . By mapping according to certain parameters, the UE may optimize PSFCH occasions in an RB set, which conserves signaling resources.
[0114] As indicated above, Fig. 8 is provided as an example. Other examples may differ from what is described with regard to Fig. 8.
[0115] Fig. 9 is a diagram illustrating an example 900 of transmitting PSFCH communications, in accordance with the present disclosure. A UE 910 (e.g., UE 120) may communicate with another UE 920 (e.g., UE 120) on a sidelink communication within a wireless network (e.g., wireless network 100) .
[0116] Example 900 shows that a PSSCH communication may be mapped to a PSFCH occasion. As shown by reference number 925, UE 910 may transmit a PSSCH communication in an RB set. UE 920 may map the PSSCH communication to a PSFCH occasion based at least in part on a source ID (e.g., ID for UE 910) , a receiving UE ID (e.g., ID for UE 920) , the quantity of PSFCH occasions in the RB set, and / or the PSFCH occasion index. As shown by reference number 930, UE 920 may transmit a PSFCH communication for the PSSCH communication in the mapped PSFCH occasion.
[0117] As indicated above, Fig. 9 is provided as an example. Other examples may differ from what is described with regard to Fig. 9.
[0118] Fig. 10 is a diagram illustrating an example 1000 of guard band resource elements (REs) , in accordance with the present disclosure.
[0119] For new PSFCH structures in SL-U, the common interlace may be transmitted by all of the sidelink receiving UEs to fulfill occupied channel bandwidth (OCB) constraints. Guard band PRBs and guard band REs may be used to mitigate in-band emission (IBE) . In some aspects, a truncated common PRB may be transmitted to alleviate IBE. Example 1000 shows dedicated PRBs (N=2 PRBs) between common PRBs. When a subcarrier spacing (SCS) is 60 kilohertz (KHz) , each PSFCH communication may occupy K4 dedicated PRBs and two common PRBs, where two common PRBs are located at the two edges of an RB set. In this case, guard band REs may be located at one edge of a common PRB.
[0120] In some aspects, the quantity of REs (N) used for a guard band may be preconfigured or configured via RRC signaling. Accordingly, the quantity of transmitted REs in a common PRB may be (12 -N) . A UE may receive an indication of the quantity of REs that are for the guard band.
[0121] As indicated above, Fig. 10 is provided as an example. Other examples may differ from what is described with regard to Fig. 10.
[0122] Fig. 11 is a diagram illustrating an example 1100 of a guard band, in accordance with the present disclosure.
[0123] In some aspects, guard band REs may be located at two edges of a common PRB, Each edge of a common PRB may have N / 2 guard band REs. Example 1100 shows a common PRB with two REs at each edge of the common PRB.
[0124] As indicated above, Fig. 11 is provided as an example. Other examples may differ from what is described with regard to Fig. 11.
[0125] Fig. 12 is a diagram illustrating an example 1200 of guard band REs, in accordance with the present disclosure.
[0126] In some aspects, a UE may follow a power allocation rule when a common PRB includes guard band REs. In some aspects, the UE may select a transmit power for the common PRB based at least in part on actual REs transmitted in the common PRB. The UE may replace the with in all the power control steps, where is the quantity of PRBs for common interlace and N is the quantity of REs used for a guard band.
[0127] In some aspects, the UE may use in PSFCH power control and drop the power allocated to guard band REs. In some aspects, the UE may select a transmit power for the common PRB based at least in part on a quantity of REs in the common PRB without subtracting REs of the guard band and dropping the REs of the guard band. The total power of one common PRB may be reduced if there are guard band REs. However, there may be an issue if N is large. When dropping power on N guard band REs, the UE may perform a partial guard band REs dropping. The dropping may start from the edge of common PRB, as shown in example 1200.
[0128] In some aspects, the UE may use in PSFCH power control and reallocate the power to the actual transmitted REs of the common PRB. In some aspects, the UE may select a transmit power for the common PRB based at least a quantity of REs in the common PRB without subtracting REs of the guard band and allocating power to REs actually used in the common PRB. In some aspects, the UE may reallocate all of the total power of one common PRB to the actual transmitted REs. In some aspects, the UE may reallocate the minimum required power of one common PRB to the actual transmitted REs.
[0129] As indicated above, Fig. 12 is provided as an example. Other examples may differ from what is described with regard to Fig. 12.
[0130] Fig. 13 is a diagram illustrating an example 1300 of transmitting a PSFCH communication with a guard band, in accordance with the present disclosure. A UE 1310 (e.g., UE 120) may communicate with another UE 1320 (e.g., UE 120) on a sidelink communication within a wireless network (e.g., wireless network 100) .
[0131] As shown by reference number 1325, UE 1310 may transmit a PSSCH communication in an RB set. As shown by reference number 1330, UE 1320 may transmit a PSFCH communication with a guard band at an edge of a common PRB, as described in connection with Figs 11 and 12.
[0132] As indicated above, Fig. 13 is provided as an example. Other examples may differ from what is described with regard to Fig. 13.
[0133] Fig. 14 is a diagram illustrating an example process 1400 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1400 is an example where the apparatus or the UE (e.g., UE 120, UE 720) performs operations associated with evenly partitioned PSFCH occasions.
[0134] As shown in Fig. 14, in some aspects, process 1400 may include receiving a PSSCH communication in an RB set (block 1410) . In some aspects, the UE (e.g., using reception component 1702 and / or communication manager 1706, depicted in Fig. 17) may receive a PSSCH communication in an RB set, as described above.
[0135] As further shown in Fig. 14, in some aspects, process 1400 may include transmitting a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set (block 1420) . In some aspects, the UE (e.g., using transmission component 1704 and / or communication manager 1706, depicted in Fig. 17) may transmit a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set, as described above.
[0136] Process 1400 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0137] In a first aspect, the multiple PSFCH occasions are frequency division multiplexed in a slot.
[0138] In a second aspect, alone or in combination with the first aspect, the multiple PSFCH occasions include the first PSFCH occasion, a second PSFCH occasion, a third PSFCH occasion, and a fourth PSFCH occasion, and wherein the method includes transmitting one or more of a second PSFCH communication for the PSSCH communication in the second PSFCH occasion of the multiple PSFCH occasions, a third PSFCH communication for the PSSCH communication in the third PSFCH occasion of the multiple PSFCH occasions, or a fourth PSFCH communication for the PSSCH communication in the fourth PSFCH occasion of the multiple PSFCH occasions.
[0139] Although Fig. 14 shows example blocks of process 1400, in some aspects, process 1400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 14. Additionally, or alternatively, two or more of the blocks of process 1400 may be performed in parallel.
[0140] Fig. 15 is a diagram illustrating an example process 1500 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1500 is an example where the apparatus or the UE (e.g., UE 120, UE 920) performs operations associated mapped PSFCH occasions.
[0141] As shown in Fig. 15, in some aspects, process 1500 may include receiving a PSSCH communication in an RB set (block 1510) . In some aspects, the UE (e.g., using reception component 1702 and / or communication manager 1706, depicted in Fig. 17) may receive a PSSCH communication in an RB set, as described above.
[0142] As further shown in Fig. 15, in some aspects, process 1500 may include transmitting, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion (block 1520) . In some aspects, the UE (e.g., using transmission component 1704 and / or communication manager 1706, depicted in Fig. 17) may transmit, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion, as described above.
[0143] Process 1500 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0144] In a first aspect, the PSFCH occasion is mapped to the PSSCH communication further based at least in part on a quantity of subchannels or slots for PSFCH occasions.
[0145] Although Fig. 15 shows example blocks of process 1500, in some aspects, process 1500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 15. Additionally, or alternatively, two or more of the blocks of process 1500 may be performed in parallel.
[0146] Fig. 16 is a diagram illustrating an example process 1600 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 1600 is an example where the apparatus or the UE (e.g., UE 120, UE 1320) performs operations associated with using a guard band for PSFCH communications.
[0147] As shown in Fig. 16, in some aspects, process 1600 may include receiving a PSSCH communication (block 1610) . In some aspects, the UE (e.g., using reception component 1702 and / or communication manager 1706, depicted in Fig. 17) may receive a PSSCH communication, as described above.
[0148] As further shown in Fig. 16, in some aspects, process 1600 may include transmitting a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB (block 1620) . In some aspects, the UE (e.g., using transmission component 1704 and / or communication manager 1706, depicted in Fig. 17) may transmit a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB, as described above.
[0149] Process 1600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0150] In a first aspect, process 1600 includes receiving an indication of a quantity of REs that are for the guard band.
[0151] In a second aspect, alone or in combination with the first aspect, process 1600 includes selecting a transmit power for the common PRB based at least in part on actual REs transmitted in the common PRB.
[0152] In a third aspect, alone or in combination with one or more of the first and second aspects, process 1600 includes selecting a transmit power for the common PRB based at least in part on a quantity of REs in the common PRB without subtracting REs of the guard band and dropping the REs of the guard band.
[0153] In a fourth aspect, alone or in combination with one or more of the first through third aspects, dropping the REs includes dropping the REs starting from the edge of the common PRB.
[0154] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, process 1600 includes selecting a transmit power for the common PRB based at least a quantity of REs in the common PRB without subtracting REs of the guard band and allocating power to REs actually used in the common PRB.
[0155] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, allocating the power includes allocating a total power to the REs actually used in the common PRB.
[0156] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, allocating the power includes allocating a specified minimum power to the REs actually used in the common PRB.
[0157] Although Fig. 16 shows example blocks of process 1600, in some aspects, process 1600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 16. Additionally, or alternatively, two or more of the blocks of process 1600 may be performed in parallel.
[0158] Fig. 17 is a diagram of an example apparatus 1700 for wireless communication, in accordance with the present disclosure. The apparatus 1700 may be a UE (e.g., UE 120, UE 720, UE 920, UE 1320) , or a UE may include the apparatus 1700. In some aspects, the apparatus 1700 includes a reception component 1702, a transmission component 1704, and / or a communication manager 1706, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 1706 is the communication manager 140 described in connection with Fig. 1. As shown, the apparatus 1700 may communicate with another apparatus 1708, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 1702 and the transmission component 1704.
[0159] In some aspects, the apparatus 1700 may be configured to perform one or more operations described herein in connection with Figs. 1-13. Additionally, or alternatively, the apparatus 1700 may be configured to perform one or more processes described herein, such as process 1400 of Fig. 14, process 1500 of Fig. 15, process 1600 of Fig. 16, or a combination thereof. In some aspects, the apparatus 1700 and / or one or more components shown in Fig. 17 may include one or more components of the UE described in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 17 may be implemented within one or more components described in connection with Fig. 2. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. In some aspects, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0160] The reception component 1702 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1708. The reception component 1702 may provide received communications to one or more other components of the apparatus 1700. In some aspects, the reception component 1702 may perform signal processing on the received communications (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, or decoding, among other examples) , and may provide the processed signals to the one or more other components of the apparatus 1700. In some aspects, the reception component 1702 may include one or more antennas, one or more modems, one or more demodulators, one or more MIMO detectors, one or more receive processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2.
[0161] The transmission component 1704 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1708. In some aspects, one or more other components of the apparatus 1700 may generate communications and may provide the generated communications to the transmission component 1704 for transmission to the apparatus 1708. In some aspects, the transmission component 1704 may perform signal processing on the generated communications (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) , and may transmit the processed signals to the apparatus 1708. In some aspects, the transmission component 1704 may include one or more antennas, one or more modems, one or more modulators, one or more transmit MIMO processors, one or more transmit processors, one or more controllers / processors, one or more memories, or a combination thereof, of the UE described in connection with Fig. 2. In some aspects, the transmission component 1704 may be co-located with the reception component 1702 in one or more transceivers.
[0162] The communication manager 1706 may support operations of the reception component 1702 and / or the transmission component 1704. In some aspects, the communication manager 1706 may receive information associated with configuring reception of communications by the reception component 1702 and / or transmission of communications by the transmission component 1704. Additionally, or alternatively, the communication manager 1706 may generate and / or provide control information to the reception component 1702 and / or the transmission component 1704 to control reception and / or transmission of communications.
[0163] In some aspects, the reception component 1702 may receive a PSSCH communication in an RB set. The transmission component 1704 may transmit a first PSFCH communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0164] In some aspects, the reception component 1702 may receive a PSSCH communication in an RB set. The transmission component 1704 may transmit, a PSFCH communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source ID, a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0165] In some aspects, the reception component 1702 may receive a PSSCH communication. The transmission component 1704 may transmit a PSFCH communication in a dedicated PRB resource with a guard band that is at an edge of a common PRB. The reception component 1702 may receive an indication of a quantity of REs that are for the guard band. The communication manager 1706 may select a transmit power for the common PRB based at least in part on actual REs transmitted in the common PRB. The communication manager 1706 may select a transmit power for the common PRB based at least in part on a quantity of REs in the common PRB without subtracting REs of the guard band and dropping the REs of the guard band. The communication manager 1706 may select a transmit power for the common PRB based at least a quantity REs in the common PRB without subtracting REs of the guard band and allocating power to REs actually used in the common PRB.
[0166] The number and arrangement of components shown in Fig. 17 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 17. Furthermore, two or more components shown in Fig. 17 may be implemented within a single component, or a single component shown in Fig. 17 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 17 may perform one or more functions described as being performed by another set of components shown in Fig. 17.
[0167] The following provides an overview of some Aspects of the present disclosure:
[0168] Aspect 1: A method of wireless communication performed by a user equipment (UE) , comprising: receiving a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set; and transmitting a first physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.
[0169] Aspect 2: The method of Aspect 1, wherein the multiple PSFCH occasions are frequency division multiplexed in a slot.
[0170] Aspect 3: The method of any of Aspects 1-2, wherein the multiple PSFCH occasions include the first PSFCH occasion, a second PSFCH occasion, a third PSFCH occasion, and a fourth PSFCH occasion, and wherein the method includes transmitting one or more of: a second PSFCH communication for the PSSCH communication in the second PSFCH occasion of the multiple PSFCH occasions, a third PSFCH communication for the PSSCH communication in the third PSFCH occasion of the multiple PSFCH occasions, or a fourth PSFCH communication for the PSSCH communication in the fourth PSFCH occasion of the multiple PSFCH occasions.
[0171] Aspect 4: A method of wireless communication performed by a user equipment (UE) , comprising: receiving a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set; and transmitting, a physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source identifier (ID) , a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.
[0172] Aspect 5: The method of Aspect 4, wherein the PSFCH occasion is mapped to the PSSCH communication further based at least in part on a quantity of subchannels or slots for PSFCH occasions.
[0173] Aspect 6: A method of wireless communication performed by a user equipment (UE) , comprising: receiving a physical sidelink shared channel (PSSCH) communication; and transmitting a physical sidelink feedback channel (PSFCH) communication in a dedicated physical resource block (PRB) resource with a guard band that is at an edge of a common PRB.
[0174] Aspect 7: The method of Aspect 6, further comprising receiving an indication of a quantity of resource elements that are for the guard band.
[0175] Aspect 8: The method of any of Aspects 6-7, further comprising selecting a transmit power for the common PRB based at least in part on actual resource elements transmitted in the common PRB.
[0176] Aspect 9: The method of Aspect 8, further comprising selecting a transmit power for the common PRB based at least in part on a quantity of resource elements (REs) in the common PRB without subtracting REs of the guard band and dropping the REs of the guard band.
[0177] Aspect 10: The method of Aspect 9, wherein dropping the REs includes dropping the REs starting from the edge of the common PRB.
[0178] Aspect 11: The method of any of Aspects 6-10, further comprising selecting a transmit power for the common PRB based at least a quantity of resource elements (REs) in the common PRB without subtracting REs of the guard band and allocating power to REs actually used in the common PRB.
[0179] Aspect 12: The method of Aspect 11, wherein allocating the power includes allocating a total power to the REs actually used in the common PRB.
[0180] Aspect 13: The method of Aspect 11, wherein allocating the power includes allocating a specified minimum power to the REs actually used in the common PRB.
[0181] Aspect 14: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-13.
[0182] Aspect 15: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-13.
[0183] Aspect 16: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-13.
[0184] Aspect 17: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-13.
[0185] Aspect 18: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-13.
[0186] Aspect 19: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-13.
[0187] 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 may be made in light of the above disclosure or may be acquired from practice of the aspects.
[0188] As used herein, the term “component” is intended to be broadly construed as hardware and / or a combination of hardware and software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, and / or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. As used herein, a “processor” is implemented in hardware and / or a combination of hardware and software. It will be apparent that systems and / or methods described herein may be implemented in different forms of hardware and / or a combination of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limiting of the aspects. Thus, the operation and behavior of the systems and / or methods are described herein without reference to specific software code, since those skilled in the art will understand that software and hardware can be designed to implement the systems and / or methods based, at least in part, on the description herein.
[0189] The hardware and data processing apparatus used to implement the various illustrative logics, logical blocks, modules and circuits described in connection with the aspects disclosed herein may be implemented or performed with a general purpose single-or multi-chip processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, or any conventional processor, controller, microcontroller, or state machine. A processor also may be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration. In some aspects, particular processes and methods may be performed by circuitry that is specific to a given function.
[0190] As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, or the like.
[0191] Even though particular combinations of features are recited in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features may be combined in ways not specifically recited in the claims and / or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set. As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (e.g., a + a, a + a + a, a + a + b, a +a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0192] No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” or the like are intended to be open-ended terms that do not limit an element that they modify (e.g., an element “having” A may also have B) . Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise. Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (e.g., if used in combination with “either” or “only one of” ) .
Claims
1.A user equipment (UE) for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, individually or collectively configured to:receive a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set; andtransmit a first physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.2.The UE of claim 1, wherein the multiple PSFCH occasions are frequency division multiplexed in a slot.3.The UE of claim 1, wherein the multiple PSFCH occasions include the first PSFCH occasion, a second PSFCH occasion, a third PSFCH occasion, and a fourth PSFCH occasion, and wherein the one or more processors are individually or collectively configured to cause the UE to transmit one or more of:a second PSFCH communication for the PSSCH communication in the second PSFCH occasion of the multiple PSFCH occasions,a third PSFCH communication for the PSSCH communication in the third PSFCH occasion of the multiple PSFCH occasions, ora fourth PSFCH communication for the PSSCH communication in the fourth PSFCH occasion of the multiple PSFCH occasions.4.A user equipment (UE) for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, individually or collectively configured to:receive a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set; andtransmit, a physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a PSFCH occasion that is mapped to the PSSCH communication based at least in part on a source identifier (ID) , a receiving UE ID, a quantity of PSFCH occasions in the RB set, and an occasion index of the PSFCH occasion.5.The UE of claim 4, wherein the PSFCH occasion is mapped to the PSSCH communication further based at least in part on a quantity of subchannels or slots for PSFCH occasions.6.A user equipment (UE) for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, individually or collectively configured to:receive a physical sidelink shared channel (PSSCH) communication; andtransmit a physical sidelink feedback channel (PSFCH) communication in a dedicated physical resource block (PRB) resource with a guard band that is at an edge of a common PRB.7.The UE of claim 6, wherein the one or more processors are individually or collectively configured to receive an indication of a quantity of resource elements that are for the guard band.8.The UE of claim 6, wherein the one or more processors are individually or collectively configured to select a transmit power for the common PRB based at least in part on actual resource elements transmitted in the common PRB.9.The UE of claim 8, wherein the one or more processors are individually or collectively configured to select a transmit power for the common PRB based at least in part on a quantity of resource elements (REs) in the common PRB without subtracting REs of the guard band and dropping the REs of the guard band.10.The UE of claim 9, wherein the one or more processors, to drop the REs, are individually or collectively configured to drop the REs starting from the edge of the common PRB.11.The UE of claim 6, wherein the one or more processors are individually or collectively configured to select a transmit power for the common PRB based at least a quantity of resource elements (REs) in the common PRB without subtracting REs of the guard band and allocating power to REs actually used in the common PRB.12.The UE of claim 11, wherein the one or more processors, to allocate the power, are individually or collectively configured to allocate a total power to the REs actually used in the common PRB.13.The UE of claim 11, wherein the one or more processors, to allocate the power, are individually or collectively configured to allocate a specified minimum power to the REs actually used in the common PRB.14.A method of wireless communication performed by a user equipment (UE) , comprising:receiving a physical sidelink shared channel (PSSCH) communication in a resource block (RB) set; andtransmitting a first physical sidelink feedback channel (PSFCH) communication for the PSSCH communication in a first PSFCH occasion of multiple PSFCH occasions that are evenly partitioned in the RB set.15.The method of claim 14, wherein the multiple PSFCH occasions are frequency division multiplexed in a slot.16.The method of claim 14, wherein the multiple PSFCH occasions include the first PSFCH occasion, a second PSFCH occasion, a third PSFCH occasion, and a fourth PSFCH occasion, and wherein the method includes transmitting one or more of:a second PSFCH communication for the PSSCH communication in the second PSFCH occasion of the multiple PSFCH occasions,a third PSFCH communication for the PSSCH communication in the third PSFCH occasion of the multiple PSFCH occasions, ora fourth PSFCH communication for the PSSCH communication in the fourth PSFCH occasion of the multiple PSFCH occasions.