WO2022217170A1 - Indications et utilisation de ressources de liaison latérale - Google Patents

Indications et utilisation de ressources de liaison latérale Download PDF

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Publication number
WO2022217170A1
WO2022217170A1 PCT/US2022/070673 US2022070673W WO2022217170A1 WO 2022217170 A1 WO2022217170 A1 WO 2022217170A1 US 2022070673 W US2022070673 W US 2022070673W WO 2022217170 A1 WO2022217170 A1 WO 2022217170A1
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WIPO (PCT)
Prior art keywords
sidelink
sidelink resources
candidate
resources
scheduled
Prior art date
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PCT/US2022/070673
Other languages
English (en)
Inventor
Tugcan Aktas
Seyedkianoush HOSSEINI
Yeliz Tokgoz
Original Assignee
Qualcomm Incorporated
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Publication date
Priority claimed from US17/450,781 external-priority patent/US20220322371A1/en
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of WO2022217170A1 publication Critical patent/WO2022217170A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for indicating and using sidelink resources.
  • NR which may also be referred to as 5G
  • 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 (DL), using CP- OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s- OFDM)) on the uplink (UL), as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s- OFDM)
  • MIMO multiple-input multiple-output
  • a method of wireless communication performed by a first user UE includes receiving, from a second UE, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second UE and one or more scheduled sidelink resources from among the one or more candidate sidelink resources, and transmitting, to the second UE, a communication in one of the one or more candidate sidelink resources.
  • a first UE for wireless communication includes a memory and one or more processors, coupled to the memory, configured to select one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE; schedule, from among the one or more candidate sidelink resources based at least in part on signal-to-interference ratios for the one or more candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first UE; and transmit, to the second UE, an indication of the one or more candidate sidelink resources and the one or more scheduled sidelink resources.
  • a first UE for wireless communication includes a memory and one or more processors, coupled to the memory, configured to receive, from a second UE, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second UE and one or more scheduled sidelink resources from among the one or more candidate sidelink resources, and transmit, to the second UE, a communication in one of the one or more candidate sidelink resources.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to select one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE; schedule, from among the one or more candidate sidelink resources based at least in part on signal-to-interference ratios for the one or more candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first UE; and transmit, to the second UE, an indication of the one or more candidate sidelink resources and the one or more scheduled sidelink resources.
  • a non-transitory computer-readable medium storing a set of instructions for wireless communication includes one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to receive, from a second UE, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second UE and one or more scheduled sidelink resources from among the one or more candidate sidelink resources, and transmit, to the second UE, a communication in one of the one or more candidate sidelink resources.
  • a first apparatus for wireless communication includes means for selecting one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second apparatus to use for transmission to the first apparatus; means for scheduling, from among the one or more candidate sidelink resources based at least in part on signal-to-interference ratios for the one or more candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first apparatus; and means for transmitting, to the second apparatus, an indication of the one or more candidate sidelink resources and the one or more scheduled sidelink resources.
  • a first apparatus for wireless communication includes means for receiving, from a second apparatus, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second apparatus and one or more scheduled sidelink resources from among the one or more candidate sidelink resources, and means for transmitting, to the second apparatus, a communication in one of the one or more candidate sidelink resources.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the drawings and specification.
  • 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.
  • 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, or artificial intelligence -enabled devices).
  • Aspects may be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components.
  • FIG. 1 is a diagram illustrating an example of a wireless network, in accordance with the present disclosure.
  • FIG. 2 is a diagram illustrating an example of a base station in communication with a user equipment (UE) in a wireless network, in accordance with the present disclosure.
  • UE user equipment
  • Fig. 3 is a diagram illustrating an example of sidelink communications, in accordance with the present disclosure.
  • Fig. 4 is a diagram illustrating an example of selecting sidelink resources, in accordance with the present disclosure.
  • Fig. 5 is a diagram illustrating an example of using a resource report for sidelink resources, in accordance with the present disclosure.
  • Fig. 6 is a diagram illustrating an example of indicating and using scheduled sidelink resources, in accordance with the present disclosure.
  • Fig. 7B is a diagram illustrating an example of resolving report conflicts, in accordance with the present disclosure.
  • Fig. 8 is a diagram illustrating examples of resources for requesting and reporting, in accordance with the present disclosure.
  • Fig. 9 is a diagram illustrating an example of indicating sidelink resources, in accordance with the present disclosure.
  • FIGs. 12-13 are block diagrams of example apparatuses for wireless communication, in accordance with the present disclosure.
  • 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 (NR) network and/or an LTE network, among other examples.
  • the wireless network 100 may include a number of base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 1 lOd) and other network entities.
  • a base station (BS) is an entity that communicates with user equipment (UEs) and may also be referred to as an NR BS, a Node B, a gNB, a 5G node B (NB), an access point, or a transmit receive point (TRP).
  • Each BS may provide communication coverage for a particular geographic area.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG)).
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e g., three) cells.
  • the terms “eNB”, “base station”, “NR BS”, “gNB”, “TRP”, “AP”, “node B”, “5G NB”, and “cell” may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, or a virtual network using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS).
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay BS 1 lOd may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay BS may also be referred to as a relay station, a relay base station, or a relay.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, such as macro BSs, pico BSs, femto BSs, and/or relay BSs. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 watts).
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, directly or indirectly, via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE 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 (WUL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • a cellular phone e.g., a smart phone
  • PDA personal digital assistant
  • WUL wireless local loop
  • Some UEs may be considered machine-type communication (MTC) or evolved or enhanced machine-type communication (eMTC) UEs.
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and/or location tags that may communicate with abase station, another device (e.g., remote device), or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Intemet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • IoT Intemet-of-Things
  • NB-IoT narrowband internet of things
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components and/or memory components.
  • the processor components and the memory components may be coupled together.
  • the processor components e.g., one or more processors
  • the memory components e.g., a memory
  • the processor components and the memory components may be operatively coupled, communicatively coupled, electronically coupled, and/or electrically coupled.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular RAT and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, and/or an air interface.
  • a frequency may also be referred to as a carrier, and/or a frequency channel.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another).
  • 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-pedestrian (V2P) protocol, or a vehicle-to-infrastructure (V2I) protocol), and/or a mesh network.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • UE 120a may indicate available sidelink resources to UE 120e, and the UE 120e may select a sidelink resource for transmission from these available sidelink resources.
  • the UE 120e may also sense a sidelink channel to determine which sidelink resources are available.
  • the UE 120e may select a sidelink resource for transmission from the sidelink resources that UE 120a indicates as available and/or from the sidelink resources that UE 120e senses are available.
  • the UE 102a may schedule one or more preferred sidelink resources on behalf of the UE 102e.
  • Devices of wireless network 100 may communicate using the electromagnetic spectmm, which may be subdivided based on frequency or wavelength into various classes, bands, channels, or the like.
  • devices of wireless network 100 may communicate using an operating band having a first frequency range (FR1), which may span from 410 MHz to 7.125 GHz, and/or may communicate using an operating band having a second frequency range (FR2), which may span from 24.25 GHz to 52.6 GHz.
  • FR1 and FR2 are sometimes referred to as mid-band frequencies.
  • FR1 is often referred to as a “sub-6 GHz” band.
  • millimeter wave may broadly represent frequencies within the EHF band, frequencies within FR2, and/or mid-band frequencies (e.g., less than 24.25 GHz). It is contemplated that the frequencies included in FR1 and FR2 may be modified, and techniques described herein are applicable to those modified frequency ranges.
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 is a diagram illustrating an example 200 of a base station 110 in communication with a UE 120 in a wireless network 100, in accordance with the present disclosure.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T > 1 and R > 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS(s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, upper layer signaling) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • CQIs channel quality indicators
  • Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, grants, upper layer signaling) and provide overhead symbols and control symbols.
  • SRPI semi
  • Antennas may include, or may be included within, one or more antenna panels, antenna groups, sets of antenna elements, and/or 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.
  • An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include a set of coplanar antenna elements and/or a set of non-coplanar antenna elements.
  • An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include antenna elements within a single housing and/or antenna elements within multiple housings.
  • An antenna panel, an antenna group, a set of antenna elements, and/or an antenna array may include one or more antenna elements coupled to one or more transmission and/or reception components, such as one or more components of Fig. 2.
  • 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 controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM), and transmitted to base station 110.
  • control information e.g., for reports that include RSRP, RSSI, RSRQ, and/or CQI
  • Transmit processor 264 may also generate reference symbols for one or more reference signals.
  • the symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM
  • a modulator and a demodulator (e.g., MOD/DEMOD 254) of the UE 120 may be included in a modem of the UE 120.
  • the UE 120 includes a transceiver.
  • the transceiver may include any combination of antenna(s) 252, modulators and/or demodulators 254, MIMO detector 256, receive processor 258, transmit processor 264, and/or TX MIMO processor 266.
  • the transceiver may be used by a processor (e.g., controller/processor 280) and memory 282 to perform aspects of any of the methods described herein (for example, as described with reference to Figs. 1-13).
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 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 UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Base station 110 may include a scheduler 246 to schedule UEs 120 for downlink and/or uplink communications.
  • a modulator and a demodulator (e.g., MOD/DEMOD 232) of the base station 110 may be included in a modem of the base station 110.
  • the base station 110 includes a transceiver.
  • the transceiver may include any combination of antenna(s) 234, modulators and/or demodulators 232, MIMO detector 236, receive processor 238, transmit processor 220, and/or TX MIMO processor 230.
  • the transceiver may be used by a processor (e.g., controller/processor 240) and memory 242 to perform aspects of any of the methods described herein (for example, as described with reference to Figs. 1-13).
  • Controller/processor 280 of UE 120 and/or any other component(s) of Fig. 2 may perform one or more techniques associated with indicating and using sidelink resources, as described in more detail elsewhere herein.
  • controller/processor 280 of UE 120 and/or any other component(s) of Fig. 2 may perform or direct operations of, for example, process lOOO ofFig. 10, process 1100 ofFig. 11, and/or other processes as described herein.
  • Memory 282 may store data and program codes for UE 120, respectively.
  • 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.
  • the one or more instructions when executed (e.g., directly, or after compiling, converting, and/or interpreting) by one or more processors of the UE 120, may cause the one or more processors and/orthe UE 120 to perform or direct operations of, for example, process 1000 of Fig. 10, process 1100 of Fig. 11, and/or other processes as described herein.
  • executing instructions may include running the instructions, converting the instructions, compiling the instructions, and/or interpreting the instructions, among other examples.
  • a first UE (e.g., UE 120) includes means for selecting one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE, means for scheduling, from among the one or more candidate sidelink resources based at least in part on signal-to-interference ratios for the one or more candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first UE, and/or means for transmitting, to the second UE, an indication of the one or more candidate sidelink resources and the one or more scheduled sidelink resources.
  • the means for the first UE to perform operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, or memory 282.
  • the first UE includes means for receiving, from a second UE, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second UE and one or more scheduled sidelink resources from among the one or more candidate sidelink resources, and/or means for transmitting, to the second UE, a communication in one of the one or more candidate sidelink resources.
  • the means for the first UE to perform operations described herein may include, for example, one or more of antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller/processor 280, or memory 282.
  • Fig. 2 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. For example, 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 controller/processor 280.
  • controller/processor 280 As indicated above, Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 is a diagram illustrating an example 300 of sidelink communications, in accordance with the present disclosure.
  • a first UE 302 may communicate with a second UE 304 (and one or more other UEs) via one or more sidelink channels 310.
  • UE 302 and UE 304 may communicate using the one or more sidelink channels 310 for P2P communications, D2D communications, V2X communications (e.g., which may include Y2V communications, V2I communications, and/or V2P communications) and/or mesh networking.
  • UE 302 and UE 304 may correspond to one or more other UEs.
  • the one or more sidelink channels 310 may include a physical sidelink control channel (PSCCH) 315, a physical sidelink shared channel (PSSCH) 320, and/or a physical sidelink feedback channel (PSFCH) 325.
  • the PSCCH 315 may be used to 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 base station (e.g., base station 110) via an access link or an access channel.
  • PDCCH physical downlink control channel
  • PUCCH physical uplink control 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 base station via an access link or an access channel.
  • 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).
  • HARQ hybrid automatic repeat request
  • ACK NACK acknowledgement or negative acknowledgement
  • TPC transmit power control
  • SR scheduling request
  • the one or more sidelink channels 310 may use resource pools.
  • a scheduling assignment (e.g., included in SCI 330) may be transmitted in sub channels using specific resource blocks (RBs) across time.
  • 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).
  • a scheduling assignment and associated data transmissions are not transmitted on adjacent RBs.
  • UE 304 may operate using a transmission mode where resource selection and/or scheduling is performed by UE 302 (e.g., rather than a base station). In some aspects, UE 302 and/or UE 304 may perform resource selection and/or scheduling by sensing channel availability for transmissions.
  • UE 304 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, may measure an RSRQ parameter (e.g., a PSSCH-RSRQ parameter) associated with various sidelink channels, and/or may determine a signal-to-interference ratio (SIR) associated with another UE on a sidelink channel.
  • S-RSSI sidelink-RSSI
  • RSRP parameter e.g., a PSSCH-RSRP parameter
  • RSRQ parameter e.g., a PSSCH-RSRQ parameter
  • SIR signal-to-interference ratio
  • UE 304 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, UE 304 may perform resource selection and/or scheduling by determining a channel busy rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating a maximum number of resource blocks that UE 304 can use for a particular set of subframes).
  • CBR channel busy rate
  • 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 a modulation and coding scheme (MCS) to be used for the upcoming sidelink transmission.
  • MCS modulation and coding scheme
  • UE 302 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, UE 302 may generate a sidelink grant for event-driven scheduling, such as for an on-demand sidelink message.
  • SPS semi-persistent scheduling
  • UE 302 and UE 304 may operate in sidelink resource allocation Mode 2, in which UE 302 and UE 304 schedule or reserve their own sidelink resources without the assistance or direction of a base station (Mode 1).
  • UE 302 may indicate available sidelink resources to UE 304, and UE 304 may select a sidelink resource for transmission from these available sidelink resources.
  • UE 304 may also sense one or more of the sidelink channels 310 to determine which sidelink resources are available.
  • UE 304 may select a sidelink resource for transmission from the sidelink resources that UE 302 indicates as available and/or from the sidelink resources that UE 304 senses are available.
  • UE 302 may schedule one or more preferred sidelink resources on behalf of UE 304.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • FIG. 4 is a diagram illustrating an example 400 of selecting sidelink resources, in accordance with the present disclosure.
  • Example 400 shows a UE 402 (e.g., a UE 302) that may receive communications on a sidelink channel from other UEs (e.g., a UE 304), such as UE 404, UE 406, and/or UE 408.
  • UE 402 e.g., a UE 302
  • UE 304 e.g., a UE 304
  • UE 404 e.g., UE 304
  • UE 404 e.g., UE 404
  • UE 406 e.g., UE 408
  • UE 404 is a transmitting UE that is transmitting communications to UE 402, which is a receiving UE.
  • UE 404 may use a report from UE 402, which may act as a reporting UE that reports available sidelink resources.
  • Example 400 shows an availability report from UE 402 to UE 404 and a communication from UE 404 to UE 402.
  • UE 404 may sense the sidelink channel in a sensing window to determine which sidelink resources (e g., subcarriers, subchannels) are available.
  • 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 per transmission priority and receive priority pair.
  • UE 404 may measure DMRSs on a PSCCH or a PSSCH, according to a configuration.
  • UE 404 may prepare to transmit a communication to UE 402.
  • UE 404 may have already sensed previous sidelink resources and successfully decoded SCI from UE 406 and UE 408.
  • UE 404 may try to reserve sidelink resources, and thus may check the availability of the future sidelink resources reserved by UE 406 and UE 408 by sensing the sidelink channel in the sensing window.
  • UE 404 may measure an RSRP of a signal from UE 408 in sidelink resource 410, and an RSRP of a signal from UE 406 in sidelink resource 412.
  • the corresponding sidelink resource may be available for reservations by UE 404.
  • UE 404 may reserve the sidelink resource (which may be a random selection from available resources). For example, UE 404 may select and reserve sidelink resource 414 for transmission. This may be in a time slot after which UE 406 and UE 408 had used sidelink resources, and UE 404 may have sensed these sidelink resources earlier.
  • 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).
  • PDB packet delay budget
  • UE 404 may be power-sensitive and thus may not afford to continually sense all of the sidelink resources.
  • UE 402 may be more capable of sensing and reporting on the sidelink resources because, for example, UE 402 may be a smart phone while UE 404 may be a smart watch.
  • UE 402 may receive unicast communications from UE 404, and UE 402 may report back available resources to UE 404.
  • UE 402 may continually sense the sidelink resources and measure interference levels involving neighboring UEs. For example, UE 402 may measure an RSRP of a signal from neighboring UE 406 as -92 dBm and an RSRP of a signal from neighboring UE 408 as -102 dBm.
  • UE 402 may mark a sidelink resource that was reserved by UE 408 as available for use for a communication from UE 404 to UE 402. This may be useful when UE 404 has more than one data stream with varying Quality of Service (QoS) requirements or transmissions with different MCS indices.
  • QoS Quality of Service
  • UE 402 may transmit a report 502 indicating an availability of each sidelink resource. Rows in the report 502 may represent subcarriers or subchannels, and columns may represent time units (e.g., slots, symbols).
  • the report 502 may be a binary report, such as a bitmap. For example, UE 402 may report a 1 bit for available and a 0 bit for unavailable.
  • Fig. 6 is a diagram illustrating an example 600 of indicating and using scheduled sidelink resources, in accordance with the present disclosure.
  • UE 402 may prefer that UE 404 use sidelink resources with lower expected interference levels over other sidelink resources. If so, according to various aspects described herein, UE 402 may schedule one or more sidelink resources on behalf of UE 404 when indicating available sidelink resources to UE 404. UE 402 may still allow UE 404 to select other sidelink resources from the remaining available sidelink resources. By scheduling preferred sidelink resources for UE 404 that are available, UE 402 may cause UE 404 to conserve power, processing resources, and signaling resources because UE 404 performs less sensing and scheduling of sidelink resources. UE 404 may still have flexibility to sense the sidelink channel and select sidelink resources to avoid interference or collisions that degrade communications, which conserves power, processing resources, and signaling resources that would otherwise be wasted on failed transmissions and retransmissions.
  • UE 404 may be configured to make a maximum of N transmissions for a packet or for a transport block.
  • UE 402 may sense the channel and select a set of candidate sidelink resources in the resource selection window of UE 404 for the N transmissions. Within the set of candidate sidelink resources, UE 402 may select and schedule M scheduled sidelink resources, where M may be 0 or up to N of the candidate sidelink resources (0 ⁇ M ⁇ N) of UE 404.
  • Example 600 shows a report 602 from UE 402 indicating the set of candidate sidelink resources (resources marked with a “1”). The report 602 also indicates a scheduled sidelink resource (resource marked with “S”) that UE 402 has scheduled for UE 404 based at least in part on sensing the sidelink channel and detecting lower interference for the scheduled sidelink resource.
  • S scheduled sidelink resource
  • UE 404 may resolve a conflict and/or prioritize the scheduling sidelink resources of different UEs in various ways. For example, UE 404 may compare priorities of packets destined for each destination UE and use the sidelink resource scheduled by the UE whose packet has the highest priority. UE 404 may compare remaining PDBs of corresponding packets for each UE destination and use the scheduled sidelink resource for the packet with the shortest remaining PDB.
  • UE 404 may postpone sidelink resource selection for a group of transmissions, transmissions for a cluster of UEs, or for all transmissions. UE 404 may postpone transmissions for a given number of slots and recheck the report combining at a corresponding slot with new reports that are received during this time.
  • UE 404 may avoid a sidelink resource scheduled by UE 402 since the sidelink resource is indicated as unavailable according to at least one other UE. Then, UE 404 may select a sidelink resource from available sidelink resources indicated in an availability report from UE 402, after combining the availability report with availability reports of other UEs. UE 404 may combine the availability reports by group or per cluster. UE 404 may mark the avoided sidelink resource as unavailable in other reports.
  • UE 404 may still use the scheduled sidelink resource.
  • UE 404 may have the location information (e.g., the zone IDs or location coordinates) of UE 402, UE 406, and/or UE 408. If the distance between UEs, such as between UE 402 and UE 406, is smaller than a pre-configured threshold, UE 404 may avoid the scheduled resource.
  • UE 404 may select a sidelink resource based at least in part on the parameters described above in connection with Fig. 7A.
  • a parameter may satisfy a parameter threshold that is specific to the parameter. For example, if the sidelink resource scheduled by UE 402 corresponds to a packet with a priority level higher than a pre-configured priority threshold, then UE 404 may use the scheduled sidelink resource.
  • UE 404 may select the scheduled resource to be used with UE 402 and select other sidelink resources for other UEs after combining availability reports of the other UEs.
  • the scheduled sidelink resource that is selected may be marked as unavailable in other availability reports.
  • UE 404 may select one of the conflicting scheduled sidelink resources randomly. By following such rules for conflicting sidelink resource reports, UE 404 may improve throughput and reduce latency while attempting to reduce conflicts. As a result, UE 404 and other UEs conserve processing resources and signaling resources.
  • Fig. 7A and Fig. 7B are provided as examples. Other examples may differ from what is described with regard to Fig. 7A and Fig. 7B.
  • Fig. 8 is a diagram illustrating examples 800 and 802 of resources for requesting and reporting, in accordance with the present disclosure.
  • Fig. 9 is a diagram illustrating an example 900 of indicating sidelink resources, in accordance with the present disclosure.
  • Example 900 shows time and frequency sidelink resources (e g., frequency subchannels and time slots) that may be marked as scheduled.
  • a reporting period may be 8 slots.
  • UE 402 may have information of a periodic pattern for arrival of new packets with respect to UE 404. For example, a new packet of a transport block may arrive in slot 3 (as a resource selection trigger). UE 402 may also have information that UE 404 is going to use a Report 0 from UE 402 at slot 0 for an initial resource selection for the transport block. Accordingly, UE 402 may mark a subset of resources in Report 0, but not in Report 1 or Report 2. Therefore, there may be no scheduled resources indicated in Report 1 or Report 2, because only Report 0 applies to slot 3. UE 404 may then make 4 sidelink resource selections based at least in part on the Report 0 received in slot 0. In other words, UE 402 may use periodicity information for UE 404 to mark candidate sidelink resources and/or scheduled sidelink resources. If traffic at UE 404 is periodic, then the reporting of UE 402 may also be periodic.
  • UE 402 may schedule (mark) resources only when UE 402 expects that UE 404 is going to use the scheduled resources for a newly generated packet. Therefore, the scheduling of resources may be selective and apply to only a subset of reports in time. This conserves signaling resources.
  • UE 404 may request a sidelink resource availability report from UE 402.
  • UE 402 may use requests from UE 404 as triggering events to schedule sidelink resources for UE 404.
  • UE 402 may still generate a report due to some other triggering event (e g., mobility operations, change in UE status, traffic conditions) and may leave some candidate sidelink resources unscheduled (unmarked) so that UE 404 may select other candidate sidelink resources if there is a need (e g., for retransmissions).
  • some other triggering event e g., mobility operations, change in UE status, traffic conditions
  • UE 404 may select other candidate sidelink resources if there is a need (e g., for retransmissions).
  • Fig. 9 is provided as an example. Other examples may differ from what is described with regard to Fig 9.
  • Fig. 10 is a diagram illustrating an example process 1000 performed, for example, by a first UE, in accordance with the present disclosure.
  • Example process 1000 is an example where the UE (e g., UE 120, UE 402) performs operations associated with sidelink resource indications and usage.
  • the UE e g., UE 120, UE 402 performs operations associated with sidelink resource indications and usage.
  • UE 402 may be referred to as a “first UE” and UE 404 may be referred to as a “second UE” when discussing operations from the viewpoint of UE 402.
  • UE 404 may be referred to as the “first UE” and UE 402 may be referred to as the “second UE” when discussing operations from the viewpoint of UE 404.
  • process 1000 may include selecting one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE (block 1010).
  • the UE e.g., using selection component 1208 depicted in Fig. 12
  • process 1000 includes receiving a communication from the second UE on one of the one or more scheduled sidelink resources.
  • the communication is an initial transmission of a transport block from the second UE.
  • process 1000 includes receiving a communication from the second UE on one of the one or more candidate sidelink resources that is not one of the one or more scheduled sidelink resources.
  • the indication is transmitted based at least in part on a request from the second UE or a triggering event.
  • process 1000 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 10. Additionally, or alternatively, two or more of the blocks of process 1000 may be performed in parallel.
  • Fig. 11 is a diagram illustrating an example process 1100 performed, for example, by a first UE, in accordance with the present disclosure.
  • Example process 1100 is an example where the UE (e g., UE 120, UE 404) performs operations associated with sidelink resource indications and usage.
  • the first UE of Fig. 11 (e.g., UE 404) may be the second UE described in connection with Fig. 10.
  • Process 1100 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.
  • process 1100 includes sensing the sidelink channel, and transmitting the communication includes transmitting the communication to the second UE in one of the one or more candidate sidelink resources that is not among the one or more scheduled sidelink resources, based at least in part on the sensing of the sidelink channel.
  • the indication includes a bitmap for the one or more candidate sidelink resources, and the one or more scheduled sidelink resources are marked in the indication as scheduled.
  • the communication is a generated packet that has not been transmitted
  • process 1100 includes selecting the one of the one or more candidate sidelink resources based at least in part on sidelink resource information from a third UE.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the third UE.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of a packet priority or a remaining PDB.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE
  • process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of an application of a fairness rule to the second UE and the third UE or a buffer status corresponding to flows from the first UE to the second UE and the third UE.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE
  • process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of sidelink channel state information reports for the second UE and the third UE, pathloss information for the second UE and the third UE, distance estimations for the second UE and the third UE, or zone identifiers for the second UE and the third UE.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on, for links to the second UE and the third UE, one or more of reliability requirements, power control levels, feedback message utilization states, communication range requirements, or communication cast types.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and process 1100 includes considering a conflicted scheduled sidelink resource as unavailable for transmission and transmitting the communication on another scheduled sidelink resource or candidate sidelink resource indicated by the second UE.
  • the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE
  • process 1100 includes considering a conflicted candidate sidelink resource or a conflicted scheduled sidelink resource as available for transmission and proceeding with transmitting the communication on the conflicted scheduled sidelink resource, based at least in part on one or more of a location of the third UE with respect to one or more of the first UE or the second UE, a network layout of the third UE with respect to one or more of the first UE or the second UE, or a sensing result for the conflicted scheduled sidelink resource satisfying an interference threshold.
  • the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidelink resource information from the one or more other UEs per group of UEs.
  • the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE, and process 1100 includes postponing selection of the one of the one or more candidate sidelink resources for transmission.
  • the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE
  • process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidelink resource information from the one or more other UEs, without consideration of the one or more candidate sidelink resources indicated by the second UE.
  • process 1100 includes iteratively removing sidelink resource information for individual UEs of the other UEs from consideration until an availability threshold is satisfied.
  • the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with one of the one or more scheduled sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidelink resource information from the one or more other UEs based at least in part on a specified parameter for the first UE satisfying a parameter threshold.
  • the sidelink resource information from one or more other UEs includes one or more scheduled sidelink resources that conflict with one of the one or more scheduled sidelink resources indicated by the second UE, and process 1100 includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by candidate sidelink resources in the sidelink resource information from the one or more other UEs.
  • process 1100 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 11. Additionally, or alternatively, two or more of the blocks of process 1100 may be performed in parallel.
  • Fig. 12 is a block diagram of an example apparatus 1200 for wireless communication.
  • the apparatus 1200 may be a first UE, or a first UE may include the apparatus 1200.
  • the apparatus 1200 includes a reception component 1202 and a transmission component 1204, which may be in communication with one another (for example, via one or more buses and/or one or more other components).
  • the apparatus 1200 may communicate with another apparatus 1206 (such as a UE, a base station, or another wireless communication device) using the reception component 1202 and the transmission component 1204.
  • the apparatus 1200 may include one or more of a selection component 1208 and/or a scheduling component 1210, among other examples.
  • the apparatus 1200 may be configured to perform one or more operations described herein in connection with Figs. 1-9. Additionally, or alternatively, the apparatus 1200 may be configured to perform one or more processes described herein, such as process 1000 of Fig. 10.
  • the apparatus 1200 and/or one or more components shown in Fig. 12 may include one or more components of the UE described above in connection with Fig. 2. Additionally, or alternatively, one or more components shown in Fig. 12 may be implemented within one or more components described above 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 a memory.
  • a component may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by a controller or a processor to perform the functions or operations of the component.
  • the reception component 1202 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 1206.
  • the reception component 1202 may provide received communications to one or more other components of the apparatus 1200.
  • the reception component 1202 may perform signal processing on the received communications (such as fdtering, 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 1200.
  • the reception component 1202 may include one or more antennas, a demodulator, a MIMO detector, a receive processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2.
  • the transmission component 1204 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1206.
  • one or more other components of the apparatus 1200 may generate communications and may provide the generated communications to the transmission component 1204 for transmission to the apparatus 1206.
  • the transmission component 1204 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 1206.
  • the transmission component 1204 may include one or more antennas, a modulator, a transmit MIMO processor, a transmit processor, a controller/processor, a memory, or a combination thereof, of the UE described above in connection with Fig. 2. In some aspects, the transmission component 1204 may be co-located with the reception component 1202 in a transceiver.
  • the selection component 1208 may select one or more candidate sidelink resources, from within a resource selection window after sensing a sidelink channel, that are available for a second UE to use for transmission to the first UE (apparatus 1200).
  • the reception component 1202 may sense the sidelink channel.
  • the scheduling component 1210 may schedule, from among the one or more candidate sidelink resources based at least in part on signal-to- mterference ratios for the one or more candidate sidelink resources, one or more scheduled sidelink resources that are preferred for transmission to the first UE.
  • the transmission component 1204 may transmit, to the second UE, an indication of the one or more candidate sidelink resources and the one or more scheduled sidelink resources.
  • Fig. 13 is a block diagram of an example apparatus 1300 for wireless communication.
  • the apparatus 1300 may be a first UE, or a first UE may include the apparatus 1300.
  • the apparatus 1300 includes a reception component 1302 and a transmission component 1304, which may be in communication with one another (for example, via one or more buses and/or one or more other components).
  • the apparatus 1300 may communicate with another apparatus 1306 (such as a UE, a base station, or another wireless communication device) using the reception component 1302 and the transmission component 1304.
  • the apparatus 1300 may include a selection component 1308, among other examples.
  • the apparatus 1300 may be configured to perform one or more operations described herein in connection with Figs.
  • the apparatus 1300 may be configured to perform one or more processes described herein, such as process 1100 of Fig. 11.
  • the apparatus 1300 and/or one or more components shown in Fig. 13 may include one or more components of the UE described above in connection with Fig. 2.
  • one or more components shown in Fig. 13 may be implemented within one or more components described above in connection with Fig. 2.
  • one or more components of the set of components may be implemented at least in part as software stored in a memory.
  • 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 a controller or a processor to perform the functions or operations of the component.
  • the transmission component 1304 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 1306.
  • one or more other components of the apparatus 1300 may generate communications and may provide the generated communications to the transmission component 1304 for transmission to the apparatus 1306.
  • the transmission component 1304 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 1306.
  • the reception component 1302 may receive, from a second UE, an indication of one or more candidate sidelink resources in a resource selection window of a sidelink channel that are available for transmission to the second UE and one or more scheduled sidelink resources from among the one or more candidate sidelink resources.
  • the transmission component 1304 may transmit, to the second UE, a communication in one of the one or more candidate sidelink resources.
  • the reception component 1302 may sense the sidelink channel, and the transmission component 1304 may transmit the communication to the second UE in one of the one or more candidate sidelink resources that is not among the one or more scheduled sidelink resources, based at least in part on the sensing of the sidelink channel.
  • the transmission component 1304 may transmit a request for the one or more candidate sidelink resources.
  • the selection component 1308 may select the one of the one or more candidate sidelink resources based at least in part on sidelink resource information from a third UE.
  • Fig. 13 The number and arrangement of components shown in Fig. 13 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. 13. Furthermore, two or more components shown in Fig. 13 may be implemented within a single component, or a single component shown in Fig. 13 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 13 may perform one or more functions described as being performed by another set of components shown in Fig. 13. [0162]
  • 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.
  • Aspect 4 The method of Aspect 1, further comprising receiving a communication from the second UE on one of the one or more candidate sidelink resources that is not one of the one or more scheduled sidelink resources.
  • Aspect 7 The method of any of Aspects 1-6, wherein the indication is transmitted for a generated packet that has not been transmitted.
  • Aspect 11 The method of Aspect 9 or 10, wherein the communication is an initial transmission of a transport block to the second UE.
  • Aspect 12 The method of any of Aspects 9-11, further comprising sensing the sidelink channel, and wherein transmitting the communication includes transmitting the communication to the second UE in one of the one or more candidate sidelink resources that is not among the one or more scheduled sidelink resources, based at least in part on the sensing of the sidelink channel.
  • Aspect 15 The method of any of Aspects 9-14, further comprising transmitting a request for the one or more candidate sidelink resources.
  • Aspect 16 The method of any of Aspects 9-15, further comprising selecting the one of the one or more candidate sidelink resources based at least in part on sidelink resource information from a third UE.
  • Aspect 17 The method of Aspect 16, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources indicated by the second UE, and wherein the method includes selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the third UE.
  • Aspect 18 The method of Aspect 16 or 17, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and wherein the method includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of a packet priority or a remaining packet delay budget.
  • Aspect 19 The method of any of Aspects 16-18, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and wherein the method includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of an application of a fairness rule to the second UE and the third UE or a buffer status corresponding to flows from the first UE to the second UE and the third UE.
  • Aspect 20 The method of any of Aspects 16-19, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and wherein the method includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on one or more of sidelink channel state information reports for the second UE and the third UE, pathloss information for the second UE and the third UE, distance estimations for the second UE and the third UE, or zone identifiers for the second UE and the third UE.
  • Aspect 21 The method of any of Aspects 16-20, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and wherein the method includes selecting the one of the one or more candidate sidelink resources for transmission based at least in part on, for links to the second UE and the third UE, one or more of reliability requirements, power control levels, feedback message utilization states, communication range requirements, or communication cast types.
  • Aspect 23 The method of any of Aspects 16-22, wherein the sidelink resource information from the third UE conflicts with the one or more candidate sidelink resources or the one or more scheduled sidelink resources indicated by the second UE, and wherein the method further comprises considering a conflicted scheduled sidelink resource as available for transmission and proceeding with transmitting the communication on a conflicted candidate sidelink resource or a conflicted scheduled sidelink resource, based at least in part on one or more of: a location of the third UE with respect to one or more of the first UE or the second UE; a network layout of the third UE with respect to one or more of the first UE or the second UE; or a sensing result for the conflicted scheduled sidelink resource satisfying an interference threshold.
  • Aspect 24 The method of any of Aspects 9-23, wherein the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE, and wherein the method further comprises selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidebnk resource information from the one or more other UEs per group of UEs.
  • Aspect 25 The method of any of Aspects 9-24, wherein the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE, and wherein the method further comprises selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidelink resource information from the one or more other UEs per geographical cluster of UEs.
  • Aspect 26 The method of any of Aspects 9-25, wherein the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with the one or more candidate sidelink resources indicated by the second UE, and wherein the method further comprises postponing selection of the one of the one or more candidate sidelink resources for transmission.
  • Aspect 28 The method of Aspect 27, further comprising iteratively removing sidelink resource information for individual UEs of the other UEs from consideration until an availability threshold is satisfied.
  • Aspect 29 The method of any of Aspects 9-28, wherein the sidelink resource information from one or more other UEs includes one or more candidate sidelink resources that conflict with one of the one or more scheduled sidelink resources indicated by the second UE, and wherein the method further comprises selecting the one of the one or more candidate sidelink resources for transmission that is also indicated as available by the sidelink resource information from the one or more other UEs based at least in part on a specified parameter for the first UE satisfying a parameter threshold.
  • Aspect 33 An apparatus for wireless communication, comprising at least one means for performing the method of one or more of Aspects 1-30.
  • Aspect 34 A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more of Aspects 1-30.
  • Aspect 35 A non-transitory computer-readable medium stonng 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 1-30.
  • the term “component” is intended to be broadly construed as hardware, firmware, 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.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • 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.
  • 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.
  • a phrase referring to “at least one of’ a list of items refers to any combination of those items, including single members.
  • “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).

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

De manière générale, divers aspects de la présente divulgation portent sur la communication sans fil. Selon certains aspects, un premier équipement utilisateur (UE) peut sélectionner au moins une ressource de liaison latérale candidate, à partir d'une fenêtre de sélection de ressources après la détection d'un canal de liaison latérale, qui est disponible pour être utilisée par un second UE en vue d'une transmission au premier UE. L'UE peut programmer, parmi les ressources de liaison latérale candidates en fonction, au moins en partie, de rapports signal sur brouillage pour les ressources de liaison latérale candidates, au moins une ressource de liaison latérale planifiée qui est préférée pour une transmission au premier UE. L'UE peut transmettre, au second UE, une indication des ressources de liaison latérale candidates et de ladite au moins une ressource de liaison latérale planifiée. La divulgation porte sur de nombreux autres aspects.
PCT/US2022/070673 2021-04-05 2022-02-16 Indications et utilisation de ressources de liaison latérale WO2022217170A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US202163200946P 2021-04-05 2021-04-05
US63/200,946 2021-04-05
US17/450,781 2021-10-13
US17/450,781 US20220322371A1 (en) 2021-04-05 2021-10-13 Sidelink resource indications and usage

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WO2022217170A1 true WO2022217170A1 (fr) 2022-10-13

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020011336A1 (fr) * 2018-07-09 2020-01-16 Telefonaktiebolaget Lm Ericsson (Publ) Indicateur à niveaux multiples de l'état de ressources radio pour une transmission d2d prévue
WO2020035142A1 (fr) * 2018-08-16 2020-02-20 Huawei Technologies Co., Ltd. Dispositifs et procédés de sélection de ressources de liaison latérale basée sur récepteur

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020011336A1 (fr) * 2018-07-09 2020-01-16 Telefonaktiebolaget Lm Ericsson (Publ) Indicateur à niveaux multiples de l'état de ressources radio pour une transmission d2d prévue
WO2020035142A1 (fr) * 2018-08-16 2020-02-20 Huawei Technologies Co., Ltd. Dispositifs et procédés de sélection de ressources de liaison latérale basée sur récepteur

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