WO2024073919A1 - Procédés et appareils pour une transmission sl-prs pour positionnement sl de type rtt - Google Patents

Procédés et appareils pour une transmission sl-prs pour positionnement sl de type rtt Download PDF

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Publication number
WO2024073919A1
WO2024073919A1 PCT/CN2022/130957 CN2022130957W WO2024073919A1 WO 2024073919 A1 WO2024073919 A1 WO 2024073919A1 CN 2022130957 W CN2022130957 W CN 2022130957W WO 2024073919 A1 WO2024073919 A1 WO 2024073919A1
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Prior art keywords
transmission
resource
prs
resources
transceiver
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PCT/CN2022/130957
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English (en)
Inventor
Xiaodong Yu
Zhennian SUN
Hongmei Liu
Haipeng Lei
Xin Guo
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Lenovo (Beijing) Limited
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Priority to PCT/CN2022/130957 priority Critical patent/WO2024073919A1/fr
Publication of WO2024073919A1 publication Critical patent/WO2024073919A1/fr

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    • 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
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink

Definitions

  • Embodiments of the present application generally relate to wireless communication technology, especially to methods and apparatuses for a sidelink positioning reference signal (SL-PRS) transmission for round trip time (RTT) -type sidelink (SL) positioning.
  • S-PRS sidelink positioning reference signal
  • RTT round trip time
  • SL sidelink positioning reference signal
  • V2X Vehicle to everything
  • UEs user equipments
  • a sidelink is a long-term evolution (LTE) feature introduced in 3GPP Release 12, and enables a direct communication between proximal UEs, and data does not need to go through a base station (BS) or a core network.
  • LTE long-term evolution
  • a PRS and a sounding reference signal (SRS) are designed to transmit on the Uu link for positioning, while sidelink PRS is not designed. Therefore, it is advantage to provide methods and apparatus for transmitting SL-PRS.
  • SRS sounding reference signal
  • the first UE may include: a transceiver; and a processor coupled to the transceiver.
  • the processor of the first UE is configured to: determine a first sidelink (SL) resource and a set of SL resources based on one of: indication information indicated, configured, or pre-configured to the first UE, and performing a resource selection operation; and transmit a first SL transmission on the first SL resource via the transceiver to a second UE, wherein the first SL transmission indicates the set of SL resources.
  • SL sidelink
  • the indication information includes at least one of the following: a first indicator for indicating a SL grant for at least one of the first SL resource or the set of SL resources; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first SL resource and the set of SL resources.
  • the first SL transmission includes at least one of the following: a first sidelink positioning reference signal (SL-PRS) transmission; or sidelink control information (SCI) .
  • SL-PRS first sidelink positioning reference signal
  • SCI sidelink control information
  • the SCI includes at least one of the following: an indicator for indicating the set of SL resources; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first SL resource and the set of SL resources.
  • the one or more resource allocation patterns are configured or pre-configured to the first UE and the second UE.
  • the set of SL resources includes at least one of the following: a second SL resource for a second SL transmission; or a third SL resource for a third SL transmission.
  • the processor of the first UE is configured to: transmit the second SL transmission on the second SL resource via the transceiver to the second UE; and receive the third SL transmission on the third SL resource via the transceiver from the second UE.
  • the first SL transmission includes a first SL-PRS transmission
  • the second SL transmission includes a second SL-PRS transmission
  • the third SL transmission includes at least one of the following: a third SL-PRS transmission; or a measurement report in response to the first SL-PRS transmission; or a measurement report in response to both the first SL-PRS transmission and the second SL-PRS transmission.
  • the processor of the first UE is configured to receive both the second SL transmission on the second SL resource and the third SL transmission on the third SL resource via the transceiver from the second UE.
  • the first SL transmission includes a first SL-PRS transmission
  • at least one of the second SL transmission or the third SL transmission includes at least one of the following: a fourth SL-PRS transmission; or a measurement report in response to the first SL-PRS transmission.
  • the second SL resource and the third SL resource belong to a single time slot.
  • the indication information includes a second indicator for indicating that the second SL transmission and the third SL transmission are transmitted by the second UE to the first UE in the single time slot.
  • the first SL transmission includes a third indicator for indicating that the second SL transmission and the third SL transmission are transmitted by the second UE to the first UE in the single time slot.
  • the processor of the first UE is configured to: transmit the second SL transmission on the second SL resource via the transceiver to the second UE; and receive a fourth SL transmission on a fourth SL resource via the transceiver from the second UE.
  • the first SL transmission includes a first SL-PRS transmission
  • the fourth SL transmission includes at least one of the following: a fifth SL-PRS transmission; or a measurement report in response to the first SL-PRS transmission.
  • the first SL transmission includes a first SL-PRS transmission
  • the second SL transmission includes a sixth SL-PRS transmission
  • the fourth SL transmission includes at least one of the following: a seventh SL-PRS transmission; or a measurement report in response to both the first SL-PRS transmission and the sixth SL-PRS transmission.
  • the fourth SL resource is selected by the second UE within a resource selection window which is starting from the first SL resource and ending at the second SL resource in a time domain; or the fourth SL resource is indicated by the indication information.
  • the first SL resource for the first SL transmission and the second SL resource for the second SL transmission belong to a single time slot.
  • the processor of the first UE is configured to transmit sidelink control information (SCI) via the transceiver to the second UE, to indicate that the first SL transmission and the second SL transmission are transmitted by the first UE to the second UE in the single time slot.
  • SCI sidelink control information
  • At least one of the indication information, the third indicator, or the SCI includes at least one of the following: a total number of two or more SL-PRS transmissions within the single time slot; a pattern index value of a positioning reference signal (PRS) pattern of the two or more SL-PRS transmissions; or a total number of symbols for the SL-PRS pattern of the two or more SL-PRS transmissions.
  • PRS positioning reference signal
  • the two or more SL-PRS transmissions are allocated in: two or more sets of continuous symbols in the single time slot; or two or more sets of noncontinuous symbols in the single time slot; or different resource elements (RE) s in a frequency domain but with same one or more symbols in the single time slot.
  • RE resource elements
  • the processor of the first UE is configured to: transmit a SL resource scheduling request for round trip time (RTT) -type SL positioning via the transceiver to a network node; and receive the indication information via the transceiver from the network node.
  • RTT round trip time
  • the indication information is included in downlink control information (DCI) or higher layer signaling.
  • DCI downlink control information
  • the first UE may include: a transceiver; and a processor coupled to the transceiver.
  • the processor of the first UE may be configured to: receive a first sidelink (SL) transmission on a first SL resource via the transceiver from a second UE, wherein the first SL transmission indicates a set of SL resources; determine a second SL resource based on at least one of: the first SL transmission received from the second UE; or indication information indicated, configured, or pre-configured to the first UE; and transmit a second SL transmission on the second SL resource via the transceiver to the second UE.
  • SL sidelink
  • the indication information includes at least one of the following: a first indicator for indicating a SL grant for the second SL resource; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first SL resource, the second SL resource, and the set of SL resources.
  • the first SL transmission includes at least one of the following: a first sidelink positioning reference signal (SL-PRS) transmission; or sidelink control information (SCI) .
  • SL-PRS first sidelink positioning reference signal
  • SCI sidelink control information
  • the SCI includes at least one of the following: a second indicator for indicating the set of SL resources; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first SL resource, the second SL resource, and the set of SL resources.
  • the one or more resource allocation patterns are configured or pre-configured to the first UE and the second UE.
  • the processor of the first UE is configured to transmit a third SL transmission via the transceiver to the second UE on a third SL resource within the set of SL resources.
  • the first SL transmission includes a first SL-PRS transmission
  • at least one of the second SL transmission or the third SL transmission includes at least one of the following: a second SL-PRS transmission; or a measurement report in response to the first SL-PRS transmission.
  • the second SL resource for the second SL transmission and the third SL resource for the third SL transmission belong to a single time slot.
  • the indication information includes a third indicator for indicating that the second SL transmission and the third SL transmission are transmitted by the first UE to the second UE in the single time slot.
  • the first SL transmission includes a fourth indicator for indicating that the second SL transmission and the third SL transmission are transmitted by the first UE to the second UE in the single time slot.
  • the processor of the first UE is configured to receive a fourth SL transmission via the transceiver from the second UE on a fourth SL resource.
  • the first SL transmission includes a first SL-PRS transmission
  • the fourth SL transmission includes a third SL-PRS transmission
  • the second SL transmission includes at least one of the following: a fourth SL-PRS transmission; or a measurement report in response to both the first SL-PRS transmission and the third SL-PRS transmission.
  • the second SL resource for the second SL transmission belongs to the set of SL resources indicated by the first SL transmission; or the second SL resource for the second SL transmission does not belong to the set of SL resources but is selected by the first UE within a resource selection window which is starting from the first SL resource and ending at the fourth SL resource; or the second SL resource for the second SL transmission is indicated by the indication information.
  • the first SL resource for the first SL transmission and the fourth SL resource for the fourth SL transmission belong to a single time slot.
  • the processor of the first UE is configured to receive sidelink control information (SCI) via the transceiver from the second UE, to indicate that the first SL transmission and the fourth SL transmission are transmitted by the first UE to the second UE in the single time slot.
  • SCI sidelink control information
  • the indication information includes a fifth indicator for indicating that the first SL transmission and the fourth SL transmission are transmitted by the first UE to the second UE in the single time slot.
  • At least one of the third indicator, the fourth indicator, or the fifth indicator includes: a total number of two or more SL-PRS transmissions within the single time slot; a pattern index value of a positioning reference signal (PRS) pattern of the two or more SL-PRS transmissions; or a total number of symbols for the SL-PRS pattern of the two or more SL-PRS transmissions.
  • PRS positioning reference signal
  • the two or more SL-PRS transmissions are allocated on: two or more sets of continuous symbols in the single time slot; or two or more sets of noncontinuous symbols in the single time slot; or different resource elements (RE) s in a frequency domain but with same one or more symbols in the single time slot.
  • RE resource elements
  • the processor of the first UE is configured to receive the indication information via the transceiver from a network node.
  • the indication information is included in downlink control information (DCI) or higher layer signaling.
  • DCI downlink control information
  • the network node may include: a transceiver; and a processor coupled to the transceiver.
  • the processor may be configured to: receive a sidelink (SL) resource scheduling request via the transceiver from a first user equipment (UE) ; and transmit first indication information via the transceiver to the first UE, wherein the first indication information includes a first indicator for indicating a SL grant for a first set of SL resources for the first UE.
  • SL sidelink
  • UE user equipment
  • the first indication information includes a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first set of SL resources.
  • the first set of SL resources includes at least one of the following: one or more resources for one or more first SL transmissions transmitted from the first UE to a second UE; or one or more resources for one or more second SL transmissions transmitted from the second UE to the first UE.
  • the one or more first SL transmissions include at least one of the following: a first sidelink positioning reference signal (SL-PRS) transmission; or sidelink control information (SCI) .
  • SL-PRS first sidelink positioning reference signal
  • SCI sidelink control information
  • the SCI includes at least one of the following: a second indicator for indicating a second set of SL resources; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with at least one of the first set of SL resources or the second set of SL resources.
  • the one or more resource allocation patterns are configured or pre-configured to the first UE and the second UE.
  • the one or more second SL transmissions include at least one of the following: a second SL-PRS transmission; or a measurement report in response to one or more SL-PRS transmissions in the one or more first SL transmissions.
  • the processor of the network node is configured to transmit second indication information via the transceiver to a second UE, and wherein the second indication information includes at least one of: a third indicator for indicating a SL grant for a second SL resource; a fourth indicator for indicating that two or more transmissions transmitted between the second UE and the first UE are in a single time slot; or a pattern index value of a resource allocation pattern within one or more resource allocation patterns in a time domain associated with the first set of SL resources and the second SL resource.
  • the first indication information includes a fifth indicator for indicating that two or more transmissions transmitted between the second UE and the first UE are in a single time slot.
  • At least one of the first indication information or the second indication information is included in downlink control information (DCI) or higher layer signaling.
  • DCI downlink control information
  • Some embodiments of the present disclosure provide a method performed by a first UE.
  • the method may include: determining a first sidelink (SL) resource and a set of SL resources based on one of: indication information configured or pre-configured to the first UE, and performing a resource selection operation; and transmitting a first SL transmission on the first SL resource to a second UE, wherein the first SL transmission indicates the set of SL resources.
  • SL sidelink
  • Some embodiments of the present disclosure provide a method performed by a first UE.
  • the method may include: receiving a first sidelink (SL) transmission on a first SL resource from a second UE, wherein the first SL transmission indicates a set of SL resources; determining a second SL resource based on at least one of: the first SL transmission received from the second UE; or indication information configured or pre-configured to the first UE; and transmitting a second SL transmission on the second SL resource to the second UE.
  • SL sidelink
  • Some embodiments of the present disclosure provide a method performed by a network node (e.g., a BS) .
  • the method may include: receiving a sidelink (SL) resource scheduling request from a first user equipment (UE) ; and transmitting first indication information to the first UE, wherein the first indication information includes an indicator for indicating a SL grant for a first set of SL resources for the first UE.
  • SL sidelink
  • UE user equipment
  • Some embodiments of the present application also provide an apparatus for wireless communications.
  • the apparatus includes: a non-transitory computer-readable medium having stored thereon computer-executable instructions; a receiving circuitry; a transmitting circuitry; and a processor coupled to the non-transitory computer-readable medium, the receiving circuitry and the transmitting circuitry, wherein the computer-executable instructions cause the processor to implement any of the above-mentioned method performed by a UE or a network node (e.g., a BS) .
  • a network node e.g., a BS
  • FIG. 1 illustrates an exemplary wireless communication system in accordance with some embodiments of the present application.
  • FIG. 2 illustrates an exemplary diagram of RTT or single-sided RTT (SS-RTT) for sidelink positioning in accordance with some embodiments of the present application.
  • SS-RTT single-sided RTT
  • FIG. 3 illustrates an exemplary diagram of double-sided RTT (DS-RTT) for sidelink positioning in accordance with some embodiments of the present application.
  • DS-RTT double-sided RTT
  • FIG. 4 illustrates a flow chart of a method performed by a UE in accordance with some embodiments of the present application.
  • FIG. 5 illustrates a flow chart of a method performed by a UE in accordance with some embodiments of the present application.
  • FIG. 6 illustrates a flow chart of a method performed by a network node in accordance with some embodiments of the present application.
  • FIGS. 7A-9 illustrate exemplary diagrams of RTT-type SL positioning in accordance with some embodiments of the present application.
  • FIGS. 10A-10C illustrate exemplary diagrams of resource allocation patterns in accordance with some embodiments of the present application.
  • FIGS. 11A-11C illustrate exemplary diagrams of SL-PRS patterns in accordance with some embodiments of the present application.
  • FIG. 12 illustrates a block diagram of an exemplary apparatus in accordance with some embodiments of the present application.
  • FIG. 1 illustrates an exemplary wireless communication system in accordance with some embodiments of the present application.
  • a wireless communication system 100 may include a base station (e.g., BS 120) and some UEs 110 (e.g., UE 110a, UE 110b, and UE 110c) .
  • UEs 110 e.g., UE 110a, UE 110b, and UE 110c
  • FIG. 1 illustrates an exemplary wireless communication system in accordance with some embodiments of the present application.
  • a wireless communication system 100 may include a base station (e.g., BS 120) and some UEs 110 (e.g., UE 110a, UE 110b, and UE 110c) .
  • UEs 110a, UE 110a, UE 110b, and UE 110c e.g., UE 110a, UE 110b, and UE 110c
  • FIG. 1 illustrates an exemplary wireless communication system in accordance with some embodiments of the present application.
  • BS 120 may be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, a Home Node-B, a relay node, or a device, or described using other terminology used in the art.
  • BS 120 is generally a part of a radio access network that may include one or more controllers communicably coupled to one or more corresponding BSs.
  • BS 120 may communicate with UE (s) 110 via downlink (DL) communication signals.
  • DL downlink
  • UE 110 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like.
  • computing devices such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like.
  • UE (s) 110 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network.
  • UE (s) 110 includes wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like.
  • UE (s) 110 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, an IoT device, a vehicle, or a device, or described using other terminology used in the art.
  • UE (s) 110 may communicate with BS 120 via uplink (UL) communication signals.
  • UL uplink
  • Wireless communication system 100 may be compatible with any type of network that is capable of sending and receiving wireless communication signals.
  • wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a time division multiple access (TDMA) -based network, a code division multiple access (CDMA) -based network, an orthogonal frequency division multiple access (OFDMA) -based network, an LTE network, a 3GPP-based network, a 3GPP 5G network, a satellite communications network, a high altitude platform network, and/or other communications networks.
  • TDMA time division multiple access
  • CDMA code division multiple access
  • OFDMA orthogonal frequency division multiple access
  • wireless communication system 100 is compatible with 5G NR of the 3GPP protocol.
  • BS 120 may transmit data using an orthogonal frequency division multiple (OFDM) modulation scheme on the DL and UE (s) 110 may transmit data on the UL using a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) or cyclic prefix-OFDM (CP-OFDM) scheme.
  • DFT-S-OFDM discrete Fourier transform-spread-orthogonal frequency division multiplexing
  • CP-OFDM cyclic prefix-OFDM
  • the wireless communication system 100 may implement some other open or proprietary communication protocols, for example, WiMAX, among other protocols.
  • BS 120 and UE (s) 110 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Further, in some embodiments of the present disclosure, BS 120 and UE (s) 110 may communicate over licensed spectrums, whereas in some other embodiments, BS 120 and UE (s) 110 may communicate over unlicensed spectrums.
  • the present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.
  • BS 120 may define one or more cells, and each cell may have a coverage area 130.
  • some UEs e.g., UE 110a and UE 110b
  • BS 120 may not be the specific BS 120 as shown in FIG. 1 and can be any one of BSs 120 in a wireless communication system
  • some UEs e.g., UE 110c
  • BS 120 may not be the specific BS 120 as shown in FIG. 1 and can be any one of BSs 120 in a wireless communication system
  • some UEs e.g., UE 110c
  • the wireless communication system includes two BSs 120 with UE 110a being within the coverage of any one of the two BSs means that UE 110a is within the coverage of BS 120 (i.e., in-coverage) in the wireless communication system; and UE 110a being outside of the coverage of both BSs 120 means that UE 110a is outside the coverage of BS 120 (i.e., out-of-coverage) in the wireless communication system.
  • UE 110a and UE 110b may communicate with BS 120 via, for example, a Uu link (denoted by dotted arrow in FIG. 1) .
  • UE 110a, UE 110b, and UE 110c may communicate with each other via a sidelink (denoted by solid arrow in FIG. 1) .
  • Sidelink transmission may involve a physical sidelink control channel (PSCCH) and an associated physical sidelink shared channel (PSSCH) , which may be scheduled by the sidelink control information (SCI) carried on the PSCCH.
  • the SCI and associated PSSCH may be transmitted from a transmitting UE (hereinafter referred to as "Tx UE” ) to a receiving UE (hereinafter referred to as "Rx UE” ) in a unicast manner, to a group of Rx UEs in a groupcast manner, or to Rx UEs within a range in a broadcast manner.
  • Tx UE transmitting UE
  • Rx UE receiving UE
  • UE 110a may transmit data to UE 110b or UE 110c (acting as an Rx UE) .
  • sidelink communication supports UE-to-UE (U2U) direct communication using two transmission modes. Two sidelink resource allocation modes are supported, namely, mode 1 and mode 2. In mode 1, the sidelink resource is scheduled by the BS. In mode 2, a UE decides the sidelink transmission resources and timing in the resource pool based on the measurement result and sensing result. Sidelink communication includes NR sidelink communication and V2X sidelink communication.
  • UE1 is the trigger UE of the SL positioning and transmitting a SL-PRS (e.g., SL-PRS#1) to UE2.
  • a SL-PRS e.g., SL-PRS#1
  • mode 1 if UE2 sends a resource request after receiving SL-PRS#1, delay will be lager and decrease positioning accuracy.
  • mode 2 if UE2 performs a resource selection after receiving SL-PRS#1, delay will be lager and decrease positioning accuracy.
  • the resource allocation mechanism need to be enhanced for RTT-type SL positioning in both mode 1 and mode 2.
  • FIG. 2 illustrates an exemplary diagram of RTT or single-sided RTT (SS-RTT) for sidelink positioning in accordance with some embodiments of the present application.
  • SS-RTT single-sided RTT
  • the SL-RTT positioning method makes use of measurements of sidelink signals received from multiple anchor UEs, measured by the target UE and the measurements at multiple anchor UEs of sidelink signals transmitted from target UE.
  • UE’s location is estimated based on measurements performed between two UEs, e.g., UE1 and UE2 as shown in FIG. 2.
  • SL-RTT does not require accurate synchronization between UEs.
  • SL-PRS#1 is transmitted by UE1 at time point a and arrives at UE2 at time point n.
  • SL-PRS#2 is transmitted by UE2 at time point k and arrives at UE1 at time point b.
  • the time difference between time point a and time point n is time of flight (TOF) .
  • the time difference between time point n and time point k is T reply .
  • the time difference between time point a and time point b is T round .
  • TOF SS-RTT (e.g., TOF as shown in FIG. 2) is the propagation time for a SL-PRS transmitted between two UEs, multiplying TOF SS-RTT by the speed of light can yield the distance between two UEs.
  • the performance and positioning accuracy of multi-RTT positioning method will be impacted by clock shift error of the UE due to the limited oscillator capability of the UE.
  • the estimated error of RTT Error SS-RTT is proportional to T reply whose unit normally is millisecond.
  • SL-RTT does not require perfect synchronization among different UEs, but its accuracy can be impacted by the UE’s clock shift error.
  • FIG. 3 illustrates an exemplary diagram of double-sided RTT (DS-RTT) for sidelink positioning in accordance with some embodiments of the present application.
  • DS-RTT may significantly improve positioning accuracy.
  • the signaling procedure, a measurement report, and potential specification impact of DS-RTT have not been studied.
  • one of the main differences between the measurement report of DS-RTT and that of SS-RTT is: a single UE (e.g., UE1) needs to report at least two Rx-Tx time differences, and those two Rx-Tx time differences may satisfy a certain timing relationship.
  • two UE Rx-Tx time differences may share a common time stamp, and the common time stamp can be the ending time stamp for the first UE Rx-Tx time difference and also the starting time stamp for the latter UE Rx-Tx time difference.
  • SL-PRS#1 is transmitted by UE1 at time point a and arrives at UE2 at time point n.
  • SL-PRS#2 is transmitted by UE2 at time point k and arrives at UE1 at time point b.
  • SL-PRS#3 is transmitted by UE1 at time point c and arrives at UE2 at time point m.
  • the time difference between time point a and time point b is T round1 .
  • the time difference between time point n and time point k is T reply1 .
  • the time difference between time point k and time point m is T round2 .
  • the time difference between time point b and time point c is T reply2 .
  • SL-PRS resource (s) are explicitly or implicitly indicated in SCI.
  • a UE helps to request SL resource (s) for the UE and a further UE, and a BS may send DCI to the UE or sends DCI to the UE and the further UE separately.
  • SL-PRS transmission (s) is determined based on configuration information and a reserved resource.
  • sub slot-based transmission for RTT-type SL positioning is introduced. More details will be illustrated in the following text in combination with the appended drawings.
  • FIG. 4 illustrates a flow chart of a method performed by a UE in accordance with some embodiments of the present application.
  • a UE e.g., UE 101 as shown and illustrated in FIG. 1 or UE1 as illustrated and shown in FIGS. 7A-10C
  • other devices may also be configured to perform the method as shown and illustrated in FIG. 4.
  • a UE may determine a SL resource (denoted as SL resource#1 for simplicity) and a set of SL resources based on one of “indication information indicated, configured, or pre-configured to the UE” and “performing a resource selection operation” .
  • the UE is denoted as UE#1 for simplicity.
  • UE#1 may transmit a SL transmission (denoted as 1st SL transmission) on SL resource#1 to a further UE (e.g., UE 101b or UE2 as shown and illustrated in FIGS. 1 and 7A-10C) .
  • the further UE is denoted as UE#2 for simplicity.
  • 1st SL transmission may indicate the set of SL resources.
  • UE#1 may transmit a SL resource scheduling request for RTT-type SL positioning to a network node (e.g., BS 120 or BS as illustrated and shown in FIGS. 1, 7A, 8A, and 9) , and receive the indication information from the network node.
  • the indication information is included in DCI or higher layer signaling (e.g., radio resource control (RRC) signaling or a medium access control (MAC) control element (CE) ) .
  • RRC radio resource control
  • CE medium access control element
  • the indication information includes at least one of the following:
  • an indicator for indicating a SL grant for at least one of SL resource#1 or the set of SL resources or
  • a pattern index value of a resource allocation pattern in time domain (e.g., any of Patterns 1-3 as shown and illustrated in FIGS. 10A-10C) associated with SL resource#1 and the set of SL resources.
  • 1st SL transmission (e.g., SL transmission#1 in FIGS. 7A-11C) includes a SL-PRS transmission and/or SCI.
  • the SCI includes at least one of the following:
  • a pattern index value of a resource allocation pattern in time domain (e.g., any of Patterns 1-3 as illustrated in FIGS. 10A-10C) associated with SL resource#1 and the set of SL resources.
  • the resource allocation pattern (s) are configured or pre-configured to UE#1 and UE#2.
  • the set of SL resources includes at least one of the following:
  • SL resource#2 a SL resource for a further SL transmission (denoted as 2nd SL transmission) ;
  • UE#1 may transmit 2nd SL transmission on SL resource#2 to UE#2, and receive 3rd SL transmission on SL resource#3 from UE#2.
  • 2nd SL transmission refers to “SL transmission#3”
  • 3rd SL transmission refers to “SL transmission#2” in the embodiments of FIG. 10A
  • 2nd SL transmission refers to “SL transmission#2”
  • 3rd SL transmission refers to “SL transmission#3” in the embodiments of FIG. 10B.
  • 1st SL transmission includes a SL-PRS transmission (denoted as 1st SL-PRS transmission)
  • 2nd SL transmission includes a SL-PRS transmission (denoted as 2nd SL-PRS transmission)
  • 3rd SL transmission includes at least one of the following:
  • UE#1 may receive both “2nd SL transmission on SL resource#2” and “3rd SL transmission on SL resource#3” from UE#2.
  • 1st SL transmission includes a SL-PRS transmission
  • at least one of 2nd SL transmission or 3rd SL transmission includes a SL-PRS transmission and/or a measurement report in response to the SL-PRS transmission in 1st SL transmission. Specific examples are described in the embodiments of FIG. 10C as follows.
  • SL resource#2 and SL resource#3 belong to a single time slot.
  • the indication information (which is indicated, configured, or pre-configured to UE#1) includes an indicator (denoted as indicator#2) for indicating that 2nd SL transmission and 3rd SL transmission are transmitted by UE#2 to UE#1 in the single time slot.
  • 1st SL transmission includes an indicator (denoted as indicator#3) for indicating that 2nd SL transmission and 3rd SL transmission are transmitted by UE#2 to UE#1 in the single time slot.
  • UE#1 may transmit 2nd SL transmission on SL resource#2 to UE#2, and receive another SL transmission (denoted as 4th SL transmission) on a SL resource (denoted as SL resource#4) from UE#2.
  • 1st SL transmission refers to “SL transmission#1”
  • 2nd SL transmission refers to “SL transmission#3”
  • 4th SL transmission refers to “SL transmission#2 on selected resource” .
  • 1st SL transmission includes a SL-PRS transmission
  • 4th SL transmission includes a SL-PRS transmission and/or a measurement report in response to the SL-PRS transmission in 1st SL transmission.
  • 1st SL transmission includes a SL-PRS transmission
  • 2nd SL transmission includes a SL-PRS transmission
  • 4th SL transmission includes a SL-PRS transmission and/or a measurement report in response to both SL-PRS transmissions in 1st SL transmission and 2nd SL transmission.
  • SL resource#4 is selected by UE#2 within a resource selection window which is starting from SL resource#1 and ending at SL resource#2 in a time domain. Specific examples are described in the embodiments of FIGS. 7A and 7B as follows. In some embodiments, SL resource#4 is indicated by the indication information (which is indicated, configured, or pre-configured to UE#1) . Specific examples are described in the embodiments of FIG. 9 as follows.
  • SL resource#1 for 1st SL transmission and SL resource#2 for 2nd SL transmission belong to a single time slot.
  • UE#1 may transmit SCI to UE#2, to indicate that 1st SL transmission and 2nd SL transmission are transmitted by UE#1 to UE#2 in the single time slot.
  • the indication information, indicator#3, and/or the SCI includes at least one of the following:
  • the two or more SL-PRS transmissions are allocated in: two or more sets of continuous symbols in the single time slot; or two or more sets of noncontinuous symbols in the single time slot; or different REs in frequency domain but with same one or more symbols in the single time slot.
  • FIG. 5 illustrates a flow chart of a method performed by a UE in accordance with some embodiments of the present application.
  • a UE e.g., UE 101 or UE2 as illustrated and shown in FIGS. 1 and 7A-10C
  • FIGS. 1 and 7A-10C UE 101 or UE2 as illustrated and shown in FIGS. 1 and 7A-10C
  • other devices may also be configured to perform the method as shown and illustrated in FIG. 5.
  • a UE receives a SL transmission on a SL resource from a further UE (e.g., UE#1 in the embodiments of FIG. 4) .
  • the SL transmission (e.g., 1st SL transmission in the embodiments of FIG. 4) indicates a set of SL resources.
  • UE#2 may determine a further SL resource based on at least one of:
  • UE#2 may receive the indication information from a network node (e.g., BS 120 or BS as illustrated and shown in FIGS. 1, 7A, 8A, and 9) .
  • the indication information is included in DCI or higher layer signaling (e.g., RRC signaling or a MAC CE) .
  • the indication information includes at least one of the following:
  • UE#2 may transmit a further SL transmission on the further SL resource to UE#1.
  • the SL transmission received in operation 501 includes a SL-PRS transmission and/or SCI.
  • the SCI may include at least one of the following:
  • resource allocation pattern (2) a pattern index value of a resource allocation pattern within resource allocation pattern (s) (e.g., Patterns 1-3 as illustrated in FIGS. 10A-10C) in a time domain associated with the SL resource, the further SL resource, and the set of SL resources.
  • the resource allocation pattern (s) are configured or pre-configured to UE#2 and UE#1.
  • UE#2 may transmit another SL transmission to UE#1 on a SL resource within the set of SL resources indicated by the SL transmission.
  • the SL transmission includes a SL-PRS transmission
  • at least one of the further SL transmission or the another SL transmission includes a SL-PRS transmission and/or a measurement report in response to the SL-PRS transmission in the SL transmission.
  • the further SL resource and the another SL resource belong to a single time slot.
  • the indication information (which is indicated, configured, or pre-configured to UE#2) includes an indicator (e.g., indicator#2 in the embodiments of FIG. 4) for indicating that the further SL transmission and the another SL transmission are transmitted by UE#2 to UE#1 in the single time slot.
  • the SL transmission received in operation 501 includes an indicator (e.g., indicator#3 in the embodiments of FIG. 4) for indicating that the further SL transmission and the another SL transmission are transmitted by UE#2 to UE#1 in the single time slot.
  • UE#2 may receive an additional SL transmission from UE#1 on an additional SL resource.
  • the SL transmission includes a SL-PRS transmission
  • the additional SL transmission includes a SL-PRS transmission
  • the further SL transmission includes: a SL-PRS transmission; and/or a measurement report in response to both SL-PRS transmissions in the SL transmission and the additional SL transmission.
  • the further SL resource belongs to the set of SL resources indicated by the SL transmission. In some further embodiments, the further SL resource does not belong to the set of SL resources but is selected by UE#2. Specific examples are described in the embodiments of FIGS. 7A and 7B as follows. In some other embodiments, the further SL resource is indicated by the indication information which is indicated, configured, or pre-configured to UE#2. Specific examples are described in the embodiments of FIG. 9 as follows.
  • the SL resource and the additional SL resource belong to a single time slot.
  • UE#2 may receive SCI from UE#1, to indicate that the SL transmission and the additional SL transmission are transmitted by UE#1 to UE#2 in the single time slot.
  • the indication information includes an indicator (denoted as indicator#4) for indicating that the SL transmission and the additional SL transmission are transmitted by UE#1 to UE#2 in the single time slot.
  • At least one of indicator#2, indicator#3, or indicator#4 includes:
  • the two or more SL-PRS transmissions may be allocated on: two or more sets of continuous symbols in the single time slot; or two or more sets of noncontinuous symbols in the single time slot; or different REs in a frequency domain but with same one or more symbols in the single time slot. Specific examples are described in the embodiments of FIGS. 11A-11C as follows.
  • FIG. 6 illustrates a flow chart of a method performed by a network node in accordance with some embodiments of the present application.
  • the method may be performed by a network node (e.g., BS 120 or BS as illustrated and shown in FIGS. 1, 7A, 8A, and 9) .
  • a network node e.g., a BS
  • FIGS. 1, 7A, 8A, and 9 a network node
  • a network node may receive a SL resource scheduling request from a UE (e.g., UE#1 in the embodiments of FIG. 4) .
  • the network node may transmit indication information to the UE.
  • the indication information is denoted as indication information#1 for simplicity and may include an indicator for indicating a SL grant for a set of SL resources for the UE.
  • indication information#1 includes a pattern index value of a resource allocation pattern within resource allocation pattern (s) in time domain (e.g., Patterns 1-3 as illustrated in FIGS. 10A-10C) associated with the set of SL resources.
  • the set of SL resources may include at least one of the following:
  • SL transmission (s) transmitted from the UE to a further UE include a SL-PRS transmission and/or SCI.
  • the SCI includes at least one of the following:
  • a pattern index value of a resource allocation pattern within resource allocation pattern (s) in a time domain (e.g., Patterns 1-3 as illustrated in FIGS. 10A-10C) associated with at least one of the set of SL resources or the further set of SL resources.
  • the resource allocation pattern (s) may be configured or pre-configured to UE#1 and UE#2.
  • SL transmission (s) include at least one of the following:
  • the network node may transmit further indication information (denoted as indication information#2) to UE#2.
  • indication information#2 may include at least one of:
  • indication information#1 includes an indicator for indicating that multiple transmissions transmitted between UE#1 and UE#2 are in a single time slot. In some embodiments, at least one of indication information#1 or indication information#2 is included in DCI or higher layer signaling (e.g., RRC signaling or a MAC CE) .
  • FIGS. 7A and 7B illustrate exemplary diagrams of RTT-type SL positioning in accordance with some embodiments of the present application.
  • the embodiments of FIG. 7A refer to RTT-type SL positioning in mode 1.
  • UE1 requests a set of SL resources for UE1, and then a BS (e.g., gNB) indicates the set of SL resources to UE1.
  • UE1 may transmit a request at time point x as shown in FIG. 7A, e.g., a SL resource scheduling request, to the BS for the set of SL resources.
  • the set of SL resources may include at least one resource for at least one SL transmission from UE1 to UE2.
  • a SL transmission from UE1 to UE2 may include a SL-PRS transmission and/or SCI.
  • the BS may send a SL grant to UE1 for SL transmission (s) on the set of SL resources.
  • the BS indicates or informs the set of SL resources in DCI that arrives at UE1 at time point y as shown in FIG. 7A.
  • the BS transmits higher layer signaling, e.g., RRC signaling or a MAC CE, to indicate the set of SL resources to UE1.
  • FIG. 7B refer to RTT-type SL positioning in mode 2.
  • UE1 may perform a resource selection operation, to select resource (s) for transmitting SL transmission (s) (e.g., SL transmission#1) to UE2.
  • SL transmission e.g., SL transmission#1
  • UE1 sends SL transmission#1, which may include SCI and its associated SL-PRS transmission, based on the received SL grant from the BS in FIG. 7A or the resource selection operation in FIG. 7B.
  • the SCI may include an indicator to indicate reserved resource (s) for subsequent transmission (s) of UE1 after SL transmission#1. That is, the SCI may indicate and reserve resource (s) being used or to be used by UE1.
  • SL transmission#1 may include SCI for reserving a subsequent resource for another SL transmission, e.g., SL transmission#3 which arrives at UE2 at time point m (e.g., slot m) .
  • UE2 may determine SL resource (s) for SL transmission (s) from UE2 to UE1. For instance, UE2 may perform a resource selection operation within a resource selection window based on the time interval of SL transmission#1 (from UE1) and the time interval of SL transmission#3 (from UE1) .
  • the boundary of the resource selection window is after the time interval of SL transmission#1 (e.g., slot n) and before the time interval of SL transmission#3 (e.g., slot m) .
  • T1 is the processing time of decoding SL transmission#1.
  • T2 is potential processing time of decoding SL transmission#2 on selected resource (e.g., at time point k) from UE2 to UE1.
  • the resource selection window is starting from n+T1 and ending at m-T2.
  • UE2 may transmit SL transmission#2 on selected resource to UE1 at time point k (e.g., slot k) .
  • FIGS. 8A and 8B illustrate further exemplary diagrams of RTT-type SL positioning in accordance with some embodiments of the present application.
  • FIG. 8A refers to RTT-type SL positioning in mode 1.
  • UE1 requests a set of SL resources for both UE1 and UE2, and then a BS (e.g., gNB) indicates the set of SL resources to UE1 only.
  • a BS e.g., gNB
  • UE1 may send a SL resource scheduling request (e.g., including an identity (ID) of UE2) at time point x to the BS, to request the set of SL resources for both UE1 and UE2.
  • the BS may send a SL grant to UE1 for SL transmissions on the set of SL resources for both UE1 and UE2.
  • the SL grant is included in DCI that arrives at UE1 at time point y as shown in FIG. 8A or higher layer signaling, e.g., RRC or MAC CE.
  • the set of SL resources may include “at least one resource for at least one SL transmission from UE1 to UE2” and “at least one resource for at least one SL transmission from UE2 to UE1” .
  • a SL transmission from UE1 to UE2 may include a SL-PRS transmission and/or SCI.
  • a SL transmission from UE2 to UE1 may include SL-PRS transmission and/or its associated measurement report transmission which is in response to the SL-PRS transmission from UE1 to UE2.
  • FIG. 8B refer to RTT-type SL positioning in mode 2. Similar to FIG. 7B, in the embodiments of FIG. 8B, UE1 may perform a resource selection operation, to select resource (s) for transmitting SL transmission (s) (e.g., SL transmission#1) to UE2.
  • SL transmission e.g., SL transmission#1
  • UE1 sends SL transmission#1, which may include SCI and/or its associated SL-PRS transmission, based on the received SL grant from the BS in FIG. 8A or the resource selection operation in FIG. 8B.
  • the SCI may include an indicator to indicate reserved resource (s) for subsequent transmission (s) of both UE2 and UE1 after SL transmission#1.
  • the SCI in SL transmission#1 in the embodiments of FIGS. 8A and 8B may indicate and reserve resource (s) being used or to be used by both UE1 and UE2. For instance, the SCI in SL transmission#1 in FIGS.
  • 8A and 8B may include an indicator to indicate “a reserved resource for SL transmission#2 from UE2 to UE1 at time point k” and/or “a reserved resource for SL transmission#3 from UE1 to UE2 at time point m” .
  • FIG. 9 illustrate another exemplary diagram of RTT-type SL positioning in accordance with some embodiments of the present application.
  • the embodiments of FIG. 9 refer to RTT-type SL positioning in mode 1.
  • UE1 requests a set of SL resources for both UE1 and UE2, and then a BS indicates the set of SL resources to UE1 and UE2 separately.
  • UE1 may send a sidelink scheduling request (e.g., including ID of UE2) to a BS for a set of SL resources.
  • the set of SL resources can include “at least one resource for at least one SL transmission from UE1 to UE2” and “at least one resource for at least one SL transmission from UE2 to UE1” .
  • a SL transmission from UE1 to UE2 may include a SL-PRS transmission and/or SCI.
  • a SL transmission from UE2 to UE1 may include a SL-PRS transmission and/or its associated measurement report transmission which is in response to the SL-PRS transmission from UE1 to UE2.
  • the BS may send a SL grant to UE1 for at least one SL transmission on the set of SL resources. Then, the BS may further send a SL grant to UE2 for at least one SL transmission on the set of SL resources.
  • the BS may send a SL grant to UE1 in DCI#1 that arrives at UE1 at time point y as shown in FIG. 9 or in higher layer signaling (e.g., RRC signaling or a MAC CE) .
  • UE1 may send SCI and its associated SL-PRS transmission, e.g., in SL transmission#1 at time point n and SL transmission#3 at time point m, based on the SL grant.
  • the BS may further send a SL grant to UE2 in DCI#2 that arrives at UE2 at time point z as shown in FIG. 9 or in higher layer signaling (e.g., RRC signaling or a MAC CE) .
  • UE2 may send SCI and its associated SL-PRS transmission based on the received SL grant, e.g., in SL transmission#2 at time point k, based on the SL grant.
  • time point z is after time point y and prior to time point k. In the embodiments as shown in FIG. 9, time point z is after time point n. In some other embodiments of the present application, the time point z may be prior to time point n without departing from the spirit and scope of the disclosure.
  • the BS may further send indication information (in DCI#1 or higher layer signaling) to UE1, to indicate which resource is reserved for UE2 for transmitting a SL transmission, e.g., the resource at time point k for transmitting SL transmission#2.
  • indication information in DCI#1 or higher layer signaling
  • FIGS. 10A-10C illustrate exemplary diagrams of resource allocation patterns in accordance with some embodiments of the present application.
  • a resource allocation pattern may also be named as “a RTT-type SL positioning pattern” or the like.
  • the resource allocation patterns in the embodiments of FIGS. 10A-10C are named as Pattern 1, Pattern 2, and Pattern 3, respectively.
  • SL transmission#1 is transmitted by UE1 at time point a and arrives at UE2 at time point n.
  • SL transmission#2 is transmitted by UE2 at time point k and arrives at UE1 at time point b.
  • SL transmission#3 is transmitted by UE1 at time point c and arrives at UE2 at time point m. Definitions of T round1 , T reply1 , T round2 , and T reply2 in FIG. 10A are the same as those in the embodiments of FIG. 3.
  • SL transmission#1 and/or SL transmission#3 may include a SL-PRS transmission and/or SCI.
  • SL transmission#2 may include a SL-PRS transmission and/or a measurement report transmission which is in response to the SL-PRS transmission in SL transmission#1.
  • Pattern 2 as shown in FIG. 10B is similar to Pattern 1.
  • SL transmission#2 is transmitted by UE1 at time point b and arrives at UE2 at time point k.
  • the time difference between time point a and time point c is T round1 .
  • the time difference between time point n and time point m is T reply1 .
  • the time difference between time point b and time point c is T round2 .
  • the time difference between time point k and time point m is T reply2 .
  • SL transmission#1 and/or SL transmission#2 may include a SL-PRS transmission and/or SCI.
  • SL transmission#3 may include a SL-PRS transmission and/or a measurement report transmission which is in response to both SL-PRS transmissions in SL transmission#1 and SL transmission#2.
  • Pattern 3 as shown in FIG. 10C is similar to Pattern 1.
  • SL transmission#3 is transmitted by UE2 at time point m and arrives at UE1 at time point c.
  • the time difference between time point a and time point b is T round1 .
  • the time difference between time point n and time point k is T reply1 .
  • the time difference between time point a and time point c is T round2 .
  • the time difference between time point n and time point m is T reply2 .
  • SL transmission#1 may include a SL-PRS transmission and/or SCI.
  • SL transmission#2 and/or SL transmission#3 may include a SL-PRS transmission and/or a measurement report transmission which is in response to the SL-PRS transmission in SL transmission#1.
  • Pattern 1, Pattern 2, and Pattern 3 in FIGS. 10A-10C may be applicable for the embodiments of any of FIGS. 4-9.
  • the embodiments of FIGS. 7A-9 refer to Pattern 1, in which UE1 firstly transmits SL transmission#1 to UE2, UE2 secondly transmits SL transmission#2 to UE1, and then UE1 transmits SL transmission#3 to UE2.
  • Pattern 2 is applied to the embodiments of any of FIGS. 7A-9, UE1 transmits SL transmission#1 and SL transmission#2 to UE2, and then UE2 transmits SL transmission#3 to UE1.
  • Pattern 3 is applied to the embodiments of any of FIGS.
  • UE1 transmits SL transmission#1 to UE2, and then UE2 transmits SL transmission#2 and SL transmission#3 to UE1.
  • the manners or methods for determining a reserved resource of UE1 and UE2 in mode 1 or mode 2 described in the embodiments of FIGS. 7A-9 are still applied when Pattern 2 or Pattern 3 is applied.
  • a UE determines its SL transmission (s) on a reserved resource and transmit the SL transmission (s) on the reserved resource (s)
  • the UE’s determination can be based on a certain resource allocation pattern, e.g., Pattern 1.
  • a certain resource allocation pattern e.g., Pattern 1
  • a standard specification may specify that a certain resource allocation pattern (e.g., Pattern 1) should be used.
  • multiple patterns are (pre-) configured by a BS and/or indicated by higher layer signaling to the UE.
  • UE2 in any of FIGS. 7A-9 may determine that the first resource (i.e., resource at time point k) reserved by SCI in SL transmission#1 can be used for SL transmission#2 from UE2 to UE1.
  • Pattern 2 is (pre-) configured, UE2 may determine that the second resource (i.e., resource at time point m) reserved by SCI in SL transmission#1 can be used for SL transmission#3 from UE2 to UE1.
  • DCI in a DL transmission and/or SCI in a SL transmission include a pattern index value of a resource allocation pattern (e.g., Patten 1, Pattern 2 and/or Patten 3) .
  • the pattern index value is indicated by one bit. For instance, “0” represents Pattern 1, and “1” represents Pattern 2.
  • the pattern index value is indicated by multiple bits. For instance, if two bits are used, “00” represents Pattern 1, “01” represents Pattern 2, “10” represents Pattern 3, and “11” represents other cases (e.g., another pattern or an invalid case) .
  • resource (s) reserved by SCI in a SL transmission may be a set of resources indicated by a BS (e.g., a gNB) in mode 1 or a set of resources selected by UE1 in mode 2.
  • a BS e.g., a gNB
  • SL transmission#1 and SL transmission#2 can be transmitted in the same slot.
  • DCI includes an indicator to indicate UE1, to transmit SL transmission#1 and SL transmission#2 in the same slot.
  • SCI which is transmitted from UE1, includes an indicator to indicate UE2 that SL transmission#1 and SL transmission#2 are transmitted in the same slot.
  • Specific examples are described in the embodiments of FIGS. 11A-11C as follows.
  • SL-PRS transmission#1 and SL-PRS transmission#2 in FIGS. 11A-11C correspond to two SL-PRS transmissions in SL transmission#1 and SL transmission#2 in Pattern 2 which are transmitted in a single time slot by applying three SL-PRS patterns in any of FIGS. 11A-11C.
  • SL transmission#2 and SL transmission#3 can be transmitted in the same slot.
  • DCI includes an indicator to indicate UE2, to transmit SL transmission#2 and SL transmission#3 in the same slot.
  • SCI which is transmitted from UE1, includes an indicator to indicate UE2, to transmit SL transmission#2 and SL transmission#3 in the same slot.
  • Specific examples are described in the embodiments of FIGS. 11A-11C as follows.
  • SL-PRS transmission#1 and SL-PRS transmission#2 in FIGS. 11A-11C correspond to two SL-PRS transmissions in SL transmission#2 and SL transmission#3 in Pattern 3 which are transmitted in a single time slot by applying three SL-PRS patterns in any of FIGS. 11A-11C.
  • FIGS. 11A-11C illustrate exemplary diagrams of SL-PRS patterns in accordance with some embodiments of the present application.
  • Each SL-PRS pattern in the embodiments of FIGS. 11A-11C includes various number of symbols and/or various comb type.
  • a SL-PRS pattern may also be named as “a SL-PRS transmission pattern” or “a SL transmission pattern” or the like.
  • the resource allocation patterns in the embodiments of FIGS. 11A-11C are named as SL-PRS Pattern 1, SL-PRS Pattern 2, and SL-PRS Pattern 3, respectively.
  • a SL-PRS pattern can be indicated by SCI (e.g., SCI on physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) as shown in FIGS. 11A-11C) , for example, to indicate a SL-PRS pattern index value or indicate a total number of symbols for each SL-PRS pattern.
  • SCI e.g., SCI on physical sidelink control channel (PSCCH) or physical sidelink shared channel (PSSCH) as shown in FIGS. 11A-11C
  • PSCI physical sidelink control channel
  • PSSCH physical sidelink shared channel
  • following information may be transmitted from a BS to UE1 or UE2 or from UE1 to UE2:
  • a total number of multiple SL-PRS transmissions within the single time slot can be the total number of SL-PRS transmissions within a time slot, e.g., 2, which indicates that two SL-PRS transmissions are transmitted within a time slot.
  • SL-PRS Pattern 1, SL-PRS Pattern 2, or SL-PRS Pattern 3 includes two SL-PRS transmissions.
  • a SL-PRS Pattern includes three or more SL-PRS transmissions.
  • a pattern index value of a SL-PRS pattern of the multiple SL-PRS transmissions For example, a pattern index value of SL-PRS Pattern 1, SL-PRS Pattern 2, or SL-PRS Pattern 3 is transmitted to UE1 or UE2.
  • the multiple SL-PRS transmissions may be allocated in:
  • SL-PRS transmission#1 and SL-PRS transmission#2 are transmitted in two sets of continuous symbols of one time slot, and then it is RX/TX turn around in time domain.
  • a total number of symbols in SL-PRS transmission#1 and SL-PRS transmission#2 is less than or equal to a total number of symbols in the time slot.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are allocated in the same frequency resources in frequency domain.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are transmitted in two sets of noncontinuous symbols in one time slot, and then it is RX/TX turn around in time domain.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are transmitted in two sets of noncontinuous symbols with interlace structures.
  • a total number of two sets of noncontinuous symbols in SL-PRS transmission#1 and SL-PRS transmission#2 is less than or equal to a total number of symbols in the time slot.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are allocated in the same frequency resources in frequency domain.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are transmitted in different REs in frequency domain but with same symbols in one time slot, and then it is RX/TX turn around in time domain.
  • SL-PRS transmission#1 and SL-PRS transmission#2 are transmitted in REs with interlace structures and symbols with interlace structures.
  • a total number of symbols in SL-PRS transmission#1 and SL-PRS transmission#2 is less than or equal to a total number of symbols in the time slot.
  • FIG. 12 illustrates a block diagram of an exemplary apparatus 1200 in accordance with some embodiments of the present application.
  • the apparatus 1200 may include at least one processor 1206 and at least one transceiver 1202 coupled to the processor 1206.
  • the apparatus 1200 may be a UE or a network node (e.g., a BS) .
  • the transceiver 1202 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry.
  • the apparatus 1200 may further include an input device, a memory, and/or other components.
  • the apparatus 1200 may be a UE.
  • the transceiver 1202 and the processor 1206 may interact with each other so as to perform the operations with respect to the UEs described in FIGS. 1-11C.
  • the apparatus 1200 may be a network node (e.g., a BS) .
  • the transceiver 1202 and the processor 1206 may interact with each other so as to perform the operations with respect to the network node described in FIGS. 1-11C.
  • the apparatus 1200 may further include at least one non-transitory computer-readable medium.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 1206 to implement the method with respect to the UEs as described above.
  • the computer-executable instructions when executed, cause the processor 1206 interacting with transceiver 1202 to perform the operations with respect to the UEs described in FIGS. 1-11C.
  • the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 1206 to implement the method with respect to the network nodes (e.g., the BSs) as described above.
  • the computer-executable instructions when executed, cause the processor 1206 interacting with transceiver 1202 to perform the operations with respect to the network nodes described in FIGS. 1-11C.
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
  • the operations or steps of a method may reside as one or any combination or set of codes and/or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.
  • the terms “handover” and “path switch” may be used interchangeably.
  • the terms “includes, “ “including, “ or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
  • An element proceeded by “a, “ “an, “ or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.
  • the term “another” is defined as at least a second or more.
  • the term “having” and the like, as used herein, is defined as "including.
  • Expressions such as “A and/or B” or “at least one of A and B” may include any and all combinations of words enumerated along with the expression.
  • the expression “A and/or B” or “at least one of A and B” may include A, B, or both A and B.
  • the wording "the first, " “the second” or the like is only used to clearly illustrate the embodiments of the present application, but is not used to limit the substance of the present application.

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

Abstract

Des modes de réalisation de la présente demande concernent des procédés et des appareils de transmission de signal de référence de positionnement de liaison latérale (SL-PRS) pour un positionnement de liaison latérale (SL) de type temps aller-retour (RTT). Selon un mode de réalisation de la présente demande, un équipement utilisateur (UE) comprend un émetteur-récepteur et un processeur couplé à l'émetteur-récepteur ; et le processeur est configuré pour : déterminer une ressource de liaison latérale (SL) et un ensemble de ressources SL sur la base d'une information d'indication indiquée, configurée et/ou préconfigurée à l'UE, et réaliser une opération de sélection de ressources ; et transmettre une transmission SL sur la ressource SL par l'intermédiaire de l'émetteur-récepteur à un autre UE, la transmission SL indiquant l'ensemble de ressources SL.
PCT/CN2022/130957 2022-11-09 2022-11-09 Procédés et appareils pour une transmission sl-prs pour positionnement sl de type rtt WO2024073919A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109845373A (zh) * 2019-01-10 2019-06-04 北京小米移动软件有限公司 确定直连链路资源的方法、装置、用户设备及基站
US20210195577A1 (en) * 2019-12-20 2021-06-24 Qualcomm Incorporated Facilitating device-to-device communications
US20210314991A1 (en) * 2019-01-10 2021-10-07 Mediatek Singapore Pte. Ltd. Buffer status report transmission in a separate resource pool for vehicular communication
CN114339656A (zh) * 2020-09-29 2022-04-12 北京紫光展锐通信技术有限公司 辅链路资源处理方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109845373A (zh) * 2019-01-10 2019-06-04 北京小米移动软件有限公司 确定直连链路资源的方法、装置、用户设备及基站
US20210314991A1 (en) * 2019-01-10 2021-10-07 Mediatek Singapore Pte. Ltd. Buffer status report transmission in a separate resource pool for vehicular communication
US20210195577A1 (en) * 2019-12-20 2021-06-24 Qualcomm Incorporated Facilitating device-to-device communications
CN114339656A (zh) * 2020-09-29 2022-04-12 北京紫光展锐通信技术有限公司 辅链路资源处理方法及装置

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