Side link positioning system and method

Abstract

The disclosure relates to sending, by a first wireless communication device, a message to a second wireless communication device. The message may be used for the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more sidelink positioning reference signals (SL-PRSs) from a resource pool.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communications and, more particularly, to sidelink positioning. Background Art

[0002] Sidelink (SL) communication refers to wireless communication between two or more User Equipment (UE). In this type of communication, two or more UEs that are geographically close can communicate without being routed to a network (e.g., a base station (BS)) or a core network. Therefore, data transmission in SL communication is different from typical cellular network communication, which includes sending data to the network and receiving data from the network. In SL communication, data is transmitted directly from the source UE to the target UE, for example, through a unified air interface (e.g., PC5 interface) without passing through the network. Summary of the invention

[0003] The example embodiments disclosed herein are intended to solve problems related to one or more problems existing in the prior art, as well as to provide other features, which will become apparent when referring to the detailed description below and in conjunction with the accompanying drawings. According to multiple embodiments, example systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and are not restrictive, and it is obvious to a person of ordinary skill in the art who reads this disclosure that various modifications may be made to the disclosed embodiments while remaining within the scope of this disclosure.

[0004] Some embodiments of the present disclosure relate to systems, methods, apparatuses, and non-transitory computer-readable media for sending a message from a first wireless communication device (e.g., a transmitting UE) to a second wireless communication device (e.g., a receiving UE). The message can be used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more sidelink positioning reference signals (SL-PRS) from a resource pool.

[0005] In some embodiments, one or more SL-PRS modes can be (pre) configured in one of the following layers: Radio Resource Connection (RRC) layer, Sidelink Sidelink Positioning Protocol (SLPP), PC5 Radio Resource Control (PC5-RRC), PC5 Signaling (PC5 Signalling, PC5-S), Medium Access Control (MAC) layer, or application layer.

[0006] In some embodiments, the message may include one or more sidelink control information (SCI) messages. The one or more SCI messages can be used to indicate the frequency domain resources and / or time domain resources of the SL-PRS, the frequency domain resources and / or time domain resources of at least one SL-PRS to be punctured, the remaining frequency domain resources and / or remaining time domain resources of the SL-PRS after puncturing, or the frequency domain resources and / or time domain resources of the PSSCH.

[0007] In some embodiments, the transmission candidate position of one or more SCI messages can be mapped to the position of the frequency domain resources and / or the position of the time domain resources corresponding to one or more SL-PRS. The transmission candidate position of at least one of the one or more SCI messages can be preconfigured. One or more SL-PRS can be frequency domain multiplexed. One or more SCI messages can explicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS. The frequency domain resources corresponding to the SL-PRS configured by one or more SCI messages may include at least one of the following items: one or more resource element (RE) offsets, one or more symbol / slot offsets, one or more subchannel offsets, or one or more frequency indexes.

[0008] In some embodiments, one or more SCI messages may implicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS. One or more SCI messages may have a (pre-)configured mapping relationship with the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

[0009] In some embodiments, the message can be (pre) configured to be one of multiple modes determined as multiple SL-PRS (pre) configurations. The mode can be (pre) configured in one of the following layers: RRC layer, SLPP, PC5-RRC, PC5-S, MAC layer, or application layer. The message may include one or more side link control information (SCI) messages. One or more SCI messages may explicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS. The frequency domain resources corresponding to the SL-PRS configured by one or more SCI messages may include at least one of the following items: one or more RE offset lists, one or more subchannel offset lists, or one or more frequency index lists.

[0010] In some embodiments, one or more SCI messages may implicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS. One or more SCI messages may have a (pre) configured mapping relationship with the frequency domain resources and / or time domain resources of the SL-PRS. The frequency domain resources of the SL-PRS may be the same as each other.

[0011] In some embodiments, a bandwidth list corresponding to multiple SL-PRSs may be (pre) configured in one of the following layers: RRC layer, SLPP, PC5-RRC, PC5-S, MAC layer, or application layer. The message may be (pre) configured to indicate a bandwidth corresponding to each SL-PRS. The message may include one or more sidelink control information (SCI) messages.

[0012] In some embodiments, the frequency domain resources of each of the SL-PRS are continuous or discontinuous, and the granularity of the frequency domain resources is in units of resource units, resource blocks, subchannels, or interleaving indices. The difference between the time domain resources of each of the SL-PRS and the time domain resources of the corresponding PSSCH transmission carrying the SL-PRS related information can be limited. The SL-PRS related information may include at least one of the SL-PRS configuration information and / or the SL-PRS measurement results.

[0013] In some embodiments, the message may also be used to indicate whether to puncture the frequency domain resources and / or time domain resources used to receive or send at least one SL-PRS. The punctured frequency domain resources and / or time domain resources may be determined by at least one of the first wireless communication device, the second wireless communication device, or a third wireless communication device different from the first wireless communication device or the second wireless communication device.

[0014] In some embodiments, the message may be further (pre)configured to indicate puncturing information. The puncturing information includes at least one of the following: a puncturing indicator, a puncturing type, a puncturing number, a puncturing frequency length, a puncturing frequency starting point, a puncturing duration, a puncturing time starting point, a puncturing offset, a puncturing time domain resource indication value (TRIV), a puncturing frequency domain resource indication value (FRIV), a puncturing request, a puncturing resource location indicator, or a puncturing report. The puncturing information may be determined by the first wireless communication device, or a third wireless communication device different from the first wireless communication device or the second wireless communication device.

[0015] In some embodiments, the location of the frequency domain resources and / or time domain resources of at least one SL-PRS to be punctured is configurable or preconfigured. The remaining frequency domain resources and / or remaining time domain resources of the SL-PRS after puncturing may be (pre) configured to be received by the second wireless communication device. In a time slot or a time, the total power used to send at least one SL-PRS may be constant. In a time slot or a time, the power used to send at least one SL-PRS per resource unit / resource block / subchannel / subband may be constant.

[0016] Some embodiments of the present disclosure relate to systems, methods, apparatuses, and non-transitory computer-readable media related to a second wireless communication device receiving a message from a first wireless communication device, wherein the message can be used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more sidelink positioning reference signals (SL-PRS) from a resource pool.

[0017] In some embodiments, the message may include one or more Sidelink Control Information (SCI) messages.One or more SL-PRS may be frequency domain multiplexed.

[0018] In some embodiments, the first wireless communication device may receive / perceive based on a multiplexing index corresponding to at least one message. The first wireless communication device may select / report resources of at least one SL-PRS. The second wireless communication device may receive at least one of the one or more SL-PRSs based on the corresponding multiplexing index. The second wireless communication device may receive at least one SL-PRS.

[0019] In some embodiments, the one or more SCI messages may be used to indicate the frequency domain resources and / or time domain resources of the SL-PRS, the frequency domain resources and / or time domain resources of at least one SL-PRS to be punctured, the remaining frequency domain resources and / or remaining time domain resources of the SL-PRS after puncturing, or the frequency domain resources and / or time domain resources of the PSSCH. The second wireless communication device may receive another SCI message from the third wireless communication device, the other SCI message being based on at least one of the one or more SCI messages and / or based on a report sent by the third wireless communication device. The second wireless communication device may receive at least one SL-PRS.

[0020] In some embodiments, the first wireless communication device may receive / sense based on information (including puncturing information) from at least one message, respectively. The first wireless communication device may select / report resources of at least one SL-PRS.

[0021] The above-described embodiments and other aspects and implementations thereof are described in more detail in the drawings, the description and the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] A number of example embodiments of the present invention will be described in detail below with reference to the following drawings. The drawings are provided for illustrative purposes only and only describe example embodiments of the present invention to facilitate the reader's understanding of the present invention. Therefore, the drawings should not be construed as limiting the breadth, scope or applicability of the present invention. It should be noted that for clarity and ease of description, these drawings are not necessarily drawn to scale.

[0023] Figure 1A is a schematic diagram illustrating an example wireless communication network in accordance with various embodiments.

[0024] Figure 1B is a block diagram illustrating an example wireless communication system for sending and receiving downlink, uplink and / or SL communication signals in accordance with various embodiments.

[0025] Figure 2 Example scenarios of SL communication according to various embodiments are shown.

[0026] Figure 3 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0027] Figure 4 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0028] Figure 5 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0029] Figure 6is a schematic diagram illustrating example side link positioning according to various embodiments.

[0030] Figure 7 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0031] Figure 8 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0032] Fig. 9 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0033] Fig.10 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0034] Fig.11 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0035] Fig.12 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0036] Fig.13 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0037] Fig.14 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0038] Fig.15 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0039] Fig.16 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0040] Fig.17 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0041] Fig.18 is a schematic diagram illustrating example side link positioning according to various embodiments.

[0042] Fig.19 is a flow chart illustrating an example sidelink positioning method according to various embodiments. DETAILED DESCRIPTION

[0043] Various example embodiments of the present invention are described below with reference to the accompanying drawings to enable those of ordinary skill in the art to implement and use the present invention. It will be apparent to those of ordinary skill in the art that, after reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the present invention. Therefore, the present invention is not limited to the example embodiments and applications described and illustrated herein. In addition, the specific order or hierarchy of steps in the methods disclosed herein are merely exemplary methods. Based on design preferences, the specific order or hierarchy of steps of the disclosed methods or processes may be rearranged while remaining within the scope of the present invention. Therefore, it will be understood by those of ordinary skill in the art that the methods and techniques disclosed herein present various steps or actions in an exemplary order, and unless otherwise expressly stated, the present invention is not limited to the specific order or hierarchy presented.

[0044] With the emergence of wireless multimedia services, users' requirements for high data rates and user experience are constantly increasing, which puts higher requirements on the system capacity and coverage of traditional cellular networks. In addition, public safety, social networks, close-range data sharing, and local advertising have gradually expanded the demand for proximity services, which allow users to understand and communicate with nearby users or objects. Traditional network-centric cellular networks have limited high data rate capabilities and limited support for proximity services. In this case, device-to-device (D2D) communication came into being to address the shortcomings of the network-centric model. The application of D2D technology can reduce the burden on cellular networks, reduce UE battery consumption, increase data rates, and enhance the robustness of network infrastructure, thereby meeting the requirements of the above-mentioned high data rate services and proximity services. D2D technology is also known as Proximity Service (ProSe), one-way / sidelink / SL communication, etc.

[0045] In order to improve the reliability, data rate and latency of SL communication, carrier aggregation (CA) can be implemented for SL communication. In CA, two or more component carriers (CC) are aggregated to support a wider frequency domain transmission bandwidth. In some examples, the vehicle-mounted UE can perform SL reception and transmission on one or more CCs simultaneously. The embodiments disclosed herein relate to data segmentation and data replication based on CA.

[0046] See also Figure 1A, which shows an example wireless communication network 100. The wireless communication network 100 demonstrates group communication within a cellular network. In a wireless communication system, the network-side communication nodes or networks may include next generation NodeB (gNB), Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) NodeB (also known as Evolved NodeB, eNodeB or eNB), pico base stations, femto base stations, transmission points (Transmission Reception Point, TRP), access points (Access Point, AP), etc. Terminal-side nodes or UEs may include devices such as mobile devices, smart phones, cellular phones, personal digital assistants (PDA), tablet computers, laptops, wearable devices, vehicles with vehicle-mounted communication systems, and the like. In Figure 1A In the embodiment, the network side communication node and the terminal side communication node are represented by network 102, UE 104a and UE 104b respectively. In some embodiments, network 102 and UE 104a / 104b are sometimes referred to as "wireless communication nodes" and "wireless communication devices" respectively. Such communication nodes / communication devices can perform wireless communication.

[0047] exist Figure 1AIn the illustrated embodiment, the network 102 may define a cell 101, in which a UE 104a and a UE 104b are located. The UE 104a and / or the UE 104b may move or remain stationary within the coverage area of ​​the cell 101. The UE 104a may communicate with the network 102 via a communication channel 103a. Similarly, the UE 104b may communicate with the network 102 via a communication channel 103b. In addition, the UE 104a and the UE 104b may communicate with each other via a communication channel 105. The communication channels 103a and 103b between the corresponding UEs and the network may be implemented using an interface such as a Uu interface, which is also referred to as a Universal Mobile Telecommunication System (UMTS) air interface. The communication channel 105 between UEs is an SL communication channel, which can be implemented using a PC5 interface, wherein the PC5 interface is introduced to address the needs of high mobility and high-density applications, such as D2D communication, vehicle-to-vehicle (V2V) communication, vehicle-to-pedestrian (V2P) communication, vehicle-to-infrastructure (V2I) communication, vehicle-to-network (V2N) communication, etc. In some cases, the vehicle network communication mode can be collectively referred to as vehicle-to-everything (V2X) communication. The network 102 is connected to the core network (CN) 108 via an external interface 107 (e.g., an Iu interface).

[0048] In some examples, a remote UE (e.g., UE 104b) that does not communicate directly with network 102 or CN 108 (e.g., does not establish communication channel link 103b) communicates indirectly with network 102 and CN 108 using SL communication channel 105 through a relay UE (e.g., UE 104a), wherein the relay UE can communicate directly with network 102 and CN 108, or if the relay UE cannot communicate directly with 102 and CN 108, the remote UE communicates indirectly with network 102 and CN 108 through another relay UE that can communicate directly with network 102 and CN 108.

[0049] Figure 1B A block diagram of an example wireless communication system for sending and receiving downlink, uplink, and SL communication signals according to various embodiments of the present disclosure is shown. In some embodiments, the system may be implemented in a wireless communication system such as described above. Figure 1A The wireless communication network 100 may be used to send and receive data in a wireless communication environment.

[0050] The system usually includes Figure 1A The network 102 and UE 104a and UE 104b described. The network 102 includes a network transceiver module 110, a network antenna 112, a network memory module 116, a network processor module 114, and a network communication module 118, each of which is coupled to and interconnected with each other via a data communication bus 120 as needed. The UE 104a includes a UE transceiver module 130a, a UE antenna 132a, a UE memory module 134a, and a UE processor module 136a, each of which is coupled to and interconnected with each other via a data communication bus 140a as needed. Similarly, the UE 104b includes a UE transceiver module 130b, a UE antenna 132b, a UE memory module 134b, and a UE processor module 136b, each of which is coupled to and interconnected with each other via a data communication bus 140b as needed. The network 102 communicates with the UE 104a and UE 104b via one or more communication channels 150, which can be any wireless channel or other medium known in the art suitable for data transmission as described herein.

[0051] The system may also include Figure 1B Any number of modules other than the modules shown. It should be understood by those skilled in the art that various illustrative blocks, modules, circuits, and processing logics associated with the embodiments disclosed herein can be implemented in hardware, computer-readable software, firmware, or any actual combination thereof. In order to clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps will be generally described according to their functions. Whether such functions are implemented as hardware, firmware, or software depends on the specific application and the design constraints imposed on the entire system. A technician familiar with the concepts described herein can implement such functions in an appropriate manner for each specific application, but such implementation decisions should not be interpreted as limiting the scope of the present invention.

[0052] The wireless transmission from the antenna of one of UE 104a and UE 104b to the antenna of network 102 is called uplink transmission, and the wireless transmission from the antenna of network 102 to the antenna of one of UE 104a and UE 104b is called downlink transmission. According to some embodiments, each of UE transceiver module 130a and UE transceiver module 130b may be referred to as uplink transceiver or UE transceiver in this article. The uplink transceiver may include a transmitter circuit and a receiver circuit, and the transmitter circuit and the receiver circuit are each coupled to the corresponding antenna 132a and antenna 132b. The duplex switch may alternately couple the uplink transmitter or receiver to the uplink antenna in a time division duplex manner. Similarly, the network transceiver module 110 may be referred to as a downlink transceiver or network transceiver in this article. The downlink transceiver may include a radio frequency (RF) transmitter circuit and a receiver circuit, and the transmitter circuit and the receiver circuit are both coupled to antenna 112. The duplex switch may alternately couple the downlink transmitter or receiver to the downlink antenna 112 in a time division duplex manner. The operation of the transceiver 110, the transceiver 130a, and the transceiver 130b is coordinated in time so that the uplink receiver is coupled to the antenna 132a and the antenna 132b to receive the transmission through the wireless communication channel 150 while the downlink transmitter is coupled to the antenna 112. In some embodiments, the UE 104a and the UE 104b may use the UE transceiver 130a and the UE transceiver 130b to communicate with the network 102 through the wireless communication channel 150 through the respective antennas 132a and 132b. The wireless communication channel 150 may be any wireless channel or other medium known in the art suitable for downlink and / or uplink data transmission as described herein. The UE 104a and the UE 104b may communicate with each other through the wireless communication channel 170. The wireless communication channel 170 may be any wireless channel or other medium suitable for SL transmission of data as described herein.

[0053] UE transceiver 130a, UE transceiver 130b and network transceiver 110 are all configured to communicate via wireless data communication channel 150, and cooperate with appropriately configured antenna devices capable of supporting specific wireless communication protocols and modulation schemes. In some embodiments, UE transceiver 130a, UE transceiver 130b and network transceiver 110 are configured to support industry standards such as Long Term Evolution (LTE) and emerging 5G standards and 6G standards. However, it should be understood that the present disclosure is not necessarily limited to specific standards and related protocols in application. On the contrary, UE transceiver 130a and UE transceiver 130b and network transceiver 110 can be configured to support alternative or other wireless data communication protocols, including future standards or variations thereof.

[0054] Processor module 136a, processor module 136b and processor module 114 can each be implemented or realized using a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof to perform the functions described herein. In this manner, the processor can be implemented as a microprocessor, a controller, a microcontroller, a state machine, etc. The processor can also be implemented as a combination of computing devices, for example, a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, a combination of one or more microprocessors and a digital signal processor core, or any other such configuration.

[0055] In addition, the methods and algorithms associated with the embodiments disclosed herein may be directly embodied in hardware, firmware, software modules executed by the processor module 114, the processor module 136a, and the processor module 136b, respectively, or any practical combination thereof. The memory module 116, the memory module 134a, and the memory module 134b may be implemented as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. In this regard, the memory module 116, the memory module 134a, and the memory module 134b may be coupled to the memory module 116, the memory module 134a, and the memory module 134b, respectively, so that the processor module 114, the processor module 136a, and the processor module 136b can read information from the memory module 116, the memory module 134a, and the memory module 134b, respectively, and write information to the memory module 116, the memory module 134a, and the memory module 134b, respectively. The memory module 116, the memory module 134a, and the memory module 134b may also be integrated into their respective processor modules 114, the processor modules 136a, and the processor modules 136b. In some embodiments, the memory modules 116, the memory modules 134a, and the memory modules 134b each include a cache memory for storing temporary variables or other intermediate information during the execution of instructions of the memory modules 116, the memory modules 134a, and the memory modules 134b, respectively. The memory modules 116, the memory modules 134a, and the memory modules 134b may also each include a non-volatile memory for storing instructions executed by the processor modules 114, the processor modules 136a, and the processor modules 136b, respectively.

[0056] The network communication module 118 generally refers to the hardware, software, firmware, processing logic, and / or other components of the network 102 that enable the network transceiver 110 to communicate bidirectionally with other network components and communication nodes configured to communicate with the network 102. For example, the network communication module 118 can be configured to support Internet or WiMAX traffic. In a non-limiting typical deployment, the network communication module 118 provides an 802.3 Ethernet interface so that the network transceiver 110 can communicate with a traditional Ethernet-based computer network. In this way, the network communication module 118 may include a physical interface for connecting to a computer network (e.g., a mobile switching center (MSC)). The term "configured for" or "configured to" used herein for a specific operation or function refers to a device, component, circuit, structure, machine, signal, etc. that is physically constructed, programmed, formatted, and / or arranged to perform a specified operation or function. The network communication module 118 can allow the network 102 to communicate with other networks or core networks via wired or wireless connections.

[0057] In some embodiments, both UE 104a and UE 104b may operate in a hybrid communication network in which the UE communicates with the network 102 and also with other UEs, such as between UE 104a and UE 104b. As described in further detail below, UE 104a and UE 104b support SL communication with other UEs, as well as downlink / uplink communication between the network 102 and UE 104a and UE 104b. Typically, SL communication allows UE 104a and UE 104b to establish a direct communication link with each other, or with other UEs from different cells, without forwarding data between UEs through the network 102.

[0058] Figure 2 is a schematic diagram illustrating an example system 200 for SL communication according to various embodiments. Figure 2 As shown, the network 210 (eg Figure 1A The network 102) broadcasts a signal, which is received by the first UE 220, the second UE 230 and the third UE 240. Figure 2 UE 220 and UE 230 in the figure are shown as vehicles with an onboard communication network, and UE 240 is shown as a mobile device. As shown in SL, UE 220-UE 240 can communicate with each other (e.g., directly send and receive) over the air interface without being forwarded by network 210 or core network 250. This type of V2X communication is called PC5-based V2X communication or V2X SL communication.

[0059] As used herein, when two UEs 104a or UE 104b perform SL communication with each other through communication channel 105 / communication channel 170, the UE that sends data to another UE is referred to as a transmitting (TX) UE, and the UE that receives data is referred to as a receiving (RX) UE.

[0060] With the development of sidelink technology, there may be more reference signals designed for sidelinks to meet the needs of different technical directions. For example, sidelink positioning technology may require a sidelink positioning reference signal. In response to this demand, a dedicated resource pool and / or a shared resource pool for a sidelink positioning reference signal (SL-PRS) has emerged. How to send and receive SL-PRS (e.g., including signal design, resource allocation, measurement, frequency hopping, or repetition) in a dedicated resource pool and / or a shared resource pool is an important and urgent issue. The present disclosure is dedicated to solving this related problem.

[0061] The following aspects can be studied. The performance and feasibility of potential solutions for SL positioning can consider relative positioning, ranging, and / or absolute positioning (e.g., for Radio Access Network (RAN) 1, RAN2). In order to meet the accuracy requirements of identification, it may be necessary to evaluate the bandwidth requirements (e.g., for RAN1). The study of positioning methods (e.g., time difference of arrival (TDOA), round trip time (RTT), angle of arrival (AOA)) may include combining SL positioning measurements with other radio access technology (RAT) dependent positioning measurements (e.g., user plane (Uu) based measurements) (e.g., for RAN1). The study of sidelink reference signals for positioning purposes from a physical layer perspective may include signal design, resource allocation, measurements, related procedures, reuse of existing reference signals, procedures (from sidelink communication or from positioning) (e.g., for RAN1). In order to enable sidelink positioning to cover UE-based positioning and network-based positioning (e.g., RAN2, including coordination and alignment with RAN3 and SA2 as needed), it may be necessary to study the positioning architecture and signaling procedures (e.g., configuration, measurement reporting). When bandwidth requirements are determined and research on sidelink communications in unlicensed spectrum has progressed, whether unlicensed spectrum can be considered in further work.

[0062] For each configured downlink PRS resource, the UE may assume that the sequence r(m) is multiplied by a factor of β PRS Scaled and mapped to resource units (k, l) according to the following formula p,μ :

[0063]

[0064] m=0,1,…

[0065]

[0066] When the following conditions are met:

[0067] Resource unit (k,l) p,μ Located within the resource block occupied by the downlink PRS resources configured for the UE;

[0068] Symbol 1 is not used by any synchronization signal / physical broadcast channel (SS / PBCH) block used by the serving cell for downlink PRS sent from the same serving cell, nor is it used by any SS / PBCH block used by a non-serving cell for downlink PRS sent from the same non-serving cell. The time-frequency positions of these SS / PBCH blocks are provided to the UE by higher layers.

[0069] The timeslot number meets certain conditions.

[0070] And wherein, antenna port p=5000; It is the first symbol of the downlink PRS in the time slot and is given by the higher-layer parameter dl-PRS-ResourceSymbolOffset; time domain L PRS ∈{2, 4, 6, 12}, the size of the downlink PRS resource is given by the high-level parameter dl-PRS-NumSymbols; the time domain L PRS ∈{2, 4, 6, 12} the size of the downlink PRS resources is given by the higher layer parameter dl-PRS-NumSymbols; and the comb size Given by the higher-layer parameter dl-PRS-CombSizeN-andoffset for configuring the downlink PRS resources for RTT-based propagation delay compensation, otherwise given by the higher-layer parameter dl-PRS-CombSizeN, such that the combination is one of {2, 2}, {4, 2}, {6, 2}, {12, 2}, {4, 4}, {12, 4}, {6, 6}, {12, 6} and {12, 12}.

[0071] In some embodiments, the high layer may mean / indicate at least one of a radio resource control (RRC) layer, a sidelink positioning protocol (SLPP), PC5-RRC, PC5-S, a MAC layer, or an application layer. The physical layer may mean / indicate first-level sidelink control information (SCI), second-level SCI, SCI for SL positioning reference signal (PRS), or MAC CE.

[0072] Example 1

[0073] For a resource pool for transmitting a sidelink positioning reference signal (SL-PRS), the bandwidth of the SL-PRS may be equal to or less than the bandwidth of the resource pool. In some embodiments, the bandwidth of the SL-PRS may be regarded as / considered to be the bandwidth of the resource pool.

[0074] Figure 3 is a schematic diagram showing an example full-bandwidth sidelink positioning reference signal according to multiple embodiments. In the example of a dedicated resource pool, the SL-PRS can be sent and received using the same bandwidth as the resource pool (e.g., the dedicated resource pool). For the process of SL-PRS transmission and reception (e.g., the bandwidth of the SL-PRS is the same as the resource pool), the parameters of the SL-PRS can be (pre)configured by the upper layer. The lower layer may not indicate the (frequency of) SL-PRS.

[0075] In addition, the SL-PRS may be sent with or without a sidelink control information (SCI) indication (e.g., the SCI may or may not be in a dedicated resource pool). For example, the SL-PRS may be transmitted without an SCI. All parameters may be (pre)configured by higher layers, including bandwidth, periodicity, priority, and / or resource allocation. Other parameters of the SL-PRS may be (pre)configured by the configuration of a resource pool or frequency layer.

[0076] For mode 1, the configuration based on DCI 3 may be sent by the TRP. For mode 2, the configuration may come from higher layers or (pre) configuration. In some embodiments, the SL-PRS may be sent periodically or aperiodically.

[0077] For another case, if the bandwidth of the SL-PRS is smaller than the bandwidth of the resource pool, this process is also useful. For example, all SL-PRSs in the resource pool may have the same bandwidth, and the bandwidth may be the lowest or highest frequency domain in the resource pool.

[0078] Example 2

[0079] In some embodiments, the bandwidth of the sidelink positioning reference signal (SL-PRS) can be the same as the resource pool (e.g., a dedicated resource pool). Some parameters of the SL PRS can be (pre)configured or come from higher layers, while other parameters can come from lower layers (e.g., considering frequency division multiplexing (FDM) for some signals or channels).

[0080] For the shared resource pool, the physical sidelink shared channel (PSSCH) and SL-PRS may be transmitted via FDM.

[0081] Figure 4 is a schematic diagram illustrating an example full bandwidth sidelink positioning reference signal frequency division multiplexing or comb pattern according to various embodiments. For a dedicated resource pool, the process may be the same as the example of FDM of different SL-PRSs. For the FDM scheme, different SL-PRSs may be transmitted in the same time domain (e.g., SL-PRS1 and SL-PRS2 may be transmitted in the dedicated resource pool frequency domain).

[0082] The partitioning of the frequency domain, including different frequency granularities (continuous or discontinuous), can be (pre-)configured or come from higher layers, such as a comb pattern or a sub-channel pattern.

[0083] For different signals or channels in the same frequency domain, there may be two schemes to indicate the sidelink positioning reference signal (SL-PRS), which may be explicit indication and implicit indication.

[0084] Solution 1: Explicit indication, for example, PRS comb pattern. The low-layer sidelink control information (SCI) may indicate a frequency offset (eg, resource unit (RE) offset, subchannel offset) or other frequency indexes through bits of an SCI signal.

[0085] Solution 2: Implicit indication: The candidate position of SCI transmission can implicitly indicate the mapping of SL-PRS frequency index.

[0086] It can be like the example of SL-PRS FDM (e.g. Figure 5 and Figure 6 ) to transmit SCI signals. Figure 5 is a schematic diagram showing different time-domain SL-PRS (single port) examples according to various embodiments. Figure 6Schematic diagram showing different time domain and / or different frequency domain SL-PRS (single port) examples according to multiple embodiments. For a dedicated resource pool, considering the complexity of SCI blind detection, the SCI can be defined in the frequency domain. For example, there can only be one SCI in a defined area. The SCI can have a fixed frequency position.

[0087] Based on these conditions, for Scheme 1 (explicit indication), there is no restriction on the fixed mapping relationship between the time domain and frequency domain of SCI and the SL-PRS resource position. SCI can obtain the time and frequency of SL-PRS. For FDM or comb mode of SL-PRS, SCI may include REoffset (RE offset) or other frequency index.

[0088] exist Figure 6 In the example, SCI 1 may contain / include resource information in the frequency domain and time domain that may indicate SL-PRS1.

[0089] For scheme 2 (implicit indication), the time domain and frequency domain of the SCI may have a fixed mapping relationship with the SL-PRS resource position (e.g., Figure 6 ). If SCI 1 is transmitted in a fixed area, SL-PRS1 may be determined within the mapped area. In other words, if the UE does not perform any signal or channel transmission in the resources of SL-PRS1, the UE may not transmit anything in the resources of SCI 1. The candidate locations for SCI transmission may be mapped with SL-PRS transmission.

[0090] Example 3 (Multiple panels or multiple ports)

[0091] In some embodiments, it is beneficial to transmit SL-PRS or other signals / channels through multiple panels or multiple ports. Based on the multiple panels of the UE, one anchor UE can be regarded / identified / perceived as two anchors for positioning. For example, the time difference of arrival (TDOA) positioning method may limit the minimum number of anchors. Multi-panel or multi-port transmission can reduce the requirement for the number of anchor UEs.

[0092] In some embodiments, multiple panels or multiple ports can reduce the impact of geometric dilution of precision (GDOP). Therefore, multiple panels or multiple ports can be supported at least in SL positioning.

[0093] For SL-PRS comb patterns, at least one comb pattern may be supported in a timeslot. The at least one comb pattern may be (pre)configured by a higher layer. The physical layer may indicate which comb pattern(s) are used. At least one comb pattern in a timeslot may be used for different ports or panels.

[0094] For multi-port transmission, SL-PRS can be FDM and / or time division multiplexing (TDM). For example, SL-PRS can be transmitted via FDM in a dedicated resource pool. SL-PRS can also be indicated by two schemes. These two schemes can be explicit indication and implicit indication.

[0095] Solution 1: Explicit indication, for example, PRS comb pattern. The low-layer SCI may indicate a frequency offset list (eg, a resource element (RE) offset list, a subchannel offset list) or other frequency index lists through bits of an SCI signal.

[0096] Solution 2: Implicit indication: The frequency of SCI transmission can implicitly indicate the mapping of the SL-PRS frequency index list.

[0097] It can be like the example of SL-PRS FDM (e.g. Figure 7 ) to transmit SCI signals. Figure 7 is a schematic diagram showing an example of a multi-panel SL-PRS using FDM SCI according to various embodiments. For a dedicated resource pool, considering the complexity of blind SCI detection, the SCI may be defined in the frequency domain. For example, there may be only one SCI in a defined area. The SCI may have a fixed frequency position.

[0098] These schemes can also be applied to SCI transmission without FDM. In other words, the frequency-restricted domain of an SCI transmission can be the entire bandwidth.

[0099] Based on these conditions, for Scheme 1 (explicit indication), there is no restriction on the fixed mapping relationship between the time domain and frequency domain of SCI and the SL-PRS resource position. SCI can obtain the time and frequency of SL-PRS. For FDM or comb mode of SL-PRS, SCI can include RE offset list or other frequency index list.

[0100] exist Figure 7 In the example, one SCI (SCI 1&2) may contain / include frequency list information that may indicate SL-PRS1 and SL-PRS2.

[0101] For scheme 2 (implicit indication), the time domain and frequency domain of SCI may have a fixed mapping relationship with the SL-PRS resource position (for example, Figure 7For example, the maximum port 2 in the SCI 1&2 is used. If SCI 1&2 is sent in a fixed area, SL-PRS1 and SL-PRS2 can be determined in the mapping area. SL-PRS1 can be transmitted through port 1 and SL-PRS2 can be transmitted through port 2. In other words, if the UE does not perform signal or channel transmission in the resource area of ​​SL-PRS1 and SL-PRS2, the UE may not transmit anything in the resources of SCI 1&2. The candidate location of SCI transmission can be mapped with multi-port SL-PRS transmission.

[0102] Solution 3: Combined Solution 1 and Solution 2. For example, the SCI resource location can map the time domain of the PRS. If SCI 1&2 has been specified, it can be sent in the time domain of SL-PRS1 or SL-PRS2. The sent SL-PRS can be obtained from the frequency index list (or REOffset, port ID or panel ID).

[0103] There is a mapping relationship between SCI, comb pattern, and FDM resource offset / index. For the number of these factors, x SCIs can map y comb patterns, and y comb patterns can map z FDM resource offset lists. The FDM resource offset list can contain at least one offset, where x, y, and z can be integers.

[0104] Example 4

[0105] For a resource pool used to send SL-PRS, the bandwidth of SL-PRS may be equal to or smaller than the bandwidth of the resource pool. In some embodiments, the bandwidth of SL-PRS may be smaller than the bandwidth of the resource pool.

[0106] Case 1: SL-PRS semi-static configuration

[0107] Figure 8 is a schematic diagram showing an example SL-PRS semi-static configuration according to multiple embodiments. In a dedicated resource pool, the SL-PRS can be sent and received with different bandwidths. The bandwidth can be a plurality of candidate values ​​(e.g., Figure 8 The bandwidth may be (pre)configured by a higher layer. The bandwidth list parameters of the SL-PRS may be (pre)configured by a higher layer. The bandwidth may be indicated by a lower layer, such as SCI. After the UE receives and decodes the SCI, the UE may determine the SL-PRS resource location.

[0108] For this case, the SL-PRS may also be FDM (eg, SL-PRS4 may be FDM with another SL-PRS1 in the same resource pool). The two dedicated resource pools may be similar (eg, one for SL-PRS4 and another for SL-PRS1).

[0109] Case 2: SL-PRS dynamic configuration

[0110] Fig. 9 is a schematic diagram showing an example SL-PRS dynamic configuration according to multiple embodiments. In a dedicated resource pool, SL-PRS can be sent and received with different bandwidths. The bandwidth of SL PRS can be flexible. The bandwidth can be (pre)configured by a lower layer (as indicated by SCI). After the UE receives and decodes the SCI, the UE can determine the SL-PRS resource location.

[0111] For this case, the SCI may include the starting PRB index and PRB length of the SL-PRS. The parameters of the SL PRS may be indicated by a lower layer.

[0112] Embodiment 5 (Frequency Resource Allocation for SL-PRS)

[0113] For the frequency domain in the resource pool, the frequency of the SL-PRS can be continuous or discontinuous. The granularity can be resource element (RE), resource block (RB), subchannel, interlace, or other granularity (e.g., subband). The granularity can include comb pattern, interlace, or frequency hopping. The granularity in the frequency domain can be the same as the granularity in the time domain.

[0114] For example, in a dedicated resource pool, SL-PRS can be transmitted from different sub-bands, and the frequency granularity of these sub-bands can be continuous ( Figure 8 ), or it can be discontinuous ( Fig.10 ). Fig.10 is a schematic diagram showing an example of discontinuous (or interleaved) SL-PRS according to various embodiments. In order to receive the SL-PRS, the lower layer may sense / know which frequency domain transmits the SL-PRS.

[0115] In the resource pool, frequency division multiplexing (FDM) of reference signals (RS) or channels (CH) (e.g., physical sidelink control channel (PSCCH) / physical sidelink shared channel (PSSCH), physical sidelink feedback channel (PSFCH)) can be supported. For dedicated resource pools, Figure 8 Subband 1 and subband 4 in Fig.10 Subband 1 and subband 2 in the RF spectrum support frequency division multiplexing.

[0116] In addition, frequency hopping of RS or CH transmission can be supported. For example, SL-PRS1 can be used in Fig.11 The comb pattern may be transmitted in sub-band 1 of the RF packet and may frequency hop in sub-band 2 (for a dedicated resource pool). In other aspects, the comb pattern may be viewed / identified as a frequency hopping rule.

[0117] The comb pattern, interleaving pattern, or frequency hopping rule / pattern may be viewed / identified as sub-bands with discrete frequency granularity.

[0118] Method 1: The subband mode, comb mode, or interleaving mode can be (pre)configured by a higher layer. The lower layer can contain / include an indicator of the mode or subband index. The mapping relationship can be (pre)configured by a higher layer information element (IE). For the physical layer, only the index concept may be involved. The higher layer can also provide a list of modes, and / or the SCI's preference for the modes in the list. The higher layer can indicate the index / offset of the resource location.

[0119] Method 2 (a more flexible method): The pattern in the physical layer IE (including comb pattern, interleaving pattern and / or frequency hopping rule / pattern) can indicate the resource location. If the pattern has been (pre)configured in the higher layer, the frequency index (for the physical layer) can be regarded / recognized as a continuous index for indication. Fig.11 is a schematic diagram showing an example of a SL-PRS comb pattern or frequency hopping pattern according to various embodiments. Fig.11 As an example shown, based on method 1, the physical layer may indicate subband 1 (eg, frequency domain of index 1 and index 3). Fig.11 As another example shown, based on method 2, the physical layer may first provide a mode description and may indicate an index / offset of the mode.

[0120] Example 6

[0121] In this embodiment, frequency hopping is taken as an example to discuss the flexible mode based on method 2 in embodiment 5. It can also be applied to the comb mode or the interleaving mode.

[0122] For a shared resource pool, a Class A SCI can indicate PSSCH and a Class B SCI can indicate SL-PRS. When a UE plans to send SL-PRS (based on Mode 2 sensing), it can know the reserved resources for PSSCH. Physical layer-based SL-PRS flexible frequency hopping can avoid PSSCH resource locations (such as Fig.12 The frequency hopping may be inter-band hopping or intra-band hopping in the same resource pool or in different resource pools.

[0123] Example 7

[0124] SL-PRS transmission in the dedicated resource pool may be associated with PSSCH transmission in the SL resource pool. There may be no PSSCH resources in the dedicated resource pool for SCI and / or SL-PRS transmission. Therefore, high-layer IE transmission may be included / contained in the associated PSSCH.

[0125] For example, the timing relationship between SL-PRS and the associated PSSCH may be of interest / discussion. The associated PSSCH may be transmitted earlier than the SL-PRS. Based on the information of the associated PSSCH, the SL-PRS may be correctly received.

[0126] Alternatively, the transmission of the associated PSSCH may be close to the SL-PRS. There may be a time window restriction for the transmission of the SL-PRS and the associated PSSCH (e.g. Fig.13 shown).

[0127] For multi-port and FDM transmission, SL-PRS and associated PSSCH can be transmitted simultaneously through different ports. For SL-PRS and associated PSSCH transmitted in a shared resource pool, the ports can be the same.

[0128] Example 8 (Perception)

[0129] Based on the perception method in the side link, the time domain granularity can be a time slot and the frequency domain granularity can be a subchannel. For the perception of SL-PRS (based on the comb pattern), if the UE transmits SL-PRS in the comb pattern resource area, the UE can receive SCI or SL-PRS and can select resources for transmission.

[0130] Solution 1: For comb pattern perception, the UE may not be able to distinguish the offset (REoffset list or index list) in the comb pattern. For SL pattern 2 perception, if the UE receives SCI or SL-PRS to reserve resources in the comb pattern, the UE may not select resources based on the comb pattern.

[0131] Solution 2: Based on Solution 1, there may be some enhancement methods. For periodic or repetitive SL-PRS transmission, frequency hopping at the symbol / time slot level or changes in the comb RE offset list may be used for different periods or repetition times, which may enhance the reliability of SL-PRS transmission.

[0132] Solution 3: For comb pattern perception, the UE can distinguish the offset / offset list (RE offset list or index list) in the comb pattern. For SL mode 2 perception, if the UE receives SCI or SL-PRS to reserve resources in the comb pattern, the UE can select the resources of the comb pattern based on the comb RE offset (list).

[0133] First, for SCI design and FDM transmission, REoffset(list) or symbolOffset(list) can be introduced.

[0134] The mode 2 sensing procedure may be modified for SL-PRS sensing. The original sensed reference signal received power (RSRP) may further take into account the occupancy of the comb pattern. The resource RSRP of the RE offset occupancy list or a smaller granularity may be considered. Resources may be considered unavailable only when the number of additional comb patterns is full or the remaining comb offsets in the comb pattern are less than the number of PRS to be transmitted.

[0135] Fig.14 is a schematic diagram showing example SL-PRS sensing according to various embodiments. Based on Scheme 1, if UE1 sends or reserves a SL-PRS1 resource position, UE2 may not send SL-PRS on a SL-PRS2 resource position based on Mode 2 sensing and combing pattern.

[0136] In addition, based on Scheme 2, for the enhanced method of Scheme 1, the SL-PRS1 periodicity or repetitiveness can be regarded / identified as frequency hopping in different subband / frequency granularity or frequency hopping at the symbol / time slot level for different comb RE offset transmissions (such as Fig.15 If the SL-PRS1 resource location is sent or reserved, then Fig.15 There may be no SL-PRS transmission between the upper SL-PRS1 and the lower SL-PRS1 in the example.

[0137] Based on scheme 3, if UE1 sends or reserves SL-PRS1 resource location based on mode 2 sensing and RE offset from SCI, UE2 can know / realize that SL-PRS2 resource location is not occupied. Therefore, UE2 can reserve or send SL-PRS in SL-PRS2.

[0138] Example 9

[0139] The time granularity of puncturing can be symbol level or time slot level. For a shared resource pool, the UE can perform puncturing in a fixed domain, such as a puncturing pattern. Puncturing can be performed in one or more fixed frequency domains or granularities. Fig.16is a schematic diagram showing an example of fixed puncturing of SL-PRS in a shared resource pool according to multiple embodiments. The puncturing granularity may be a subband in a resource pool, and the resource pool may contain / include one or more subchannels. Due to PSSCH transmission or reservation, SL-PRS1 transmission may be performed by puncturing subband 4. For SL-PRS3, the UE may know / be aware that there is no PSSCH transmission or reservation. SL-PRS3 may not be punctured. In some embodiments, more than one frequency domain or granularity may be punctured.

[0140] The puncturing pattern can be (pre)configured or from higher layers. The pattern can be static, semi-static, or dynamic. Puncturing means that resources may be dropped and the UE does not receive these punctured resources.

[0141] For SL-PRS repetition, periodic transmission, or different SL-PRS in a resource pool, the actual bandwidth of the SL-PRS may be the same or different. For SL-PRS with fixed puncturing, the same number of puncturing may mean / indicate that the actual bandwidth of the SL-PRS is the same. If the number of puncturing of these SL-PRS is different, power control problems may occur. There are two solutions to this problem.

[0142] Case 1: In one time slot or one opportunity, the total power is constant. This may mean / indicate that the more puncturing of one SL-PRS, the higher the power of the non-puncturing part may be. In one time slot or one opportunity, the total power used to send at least one SL-PRS is constant.

[0143] Case 2: In a time slot or a time, the power of each RE / RB / subchannel is constant. This may mean / indicate that the more puncturing of an SL-PRS, the total power of the SL-PRS may be reduced / lowered / reduced. In a time slot or a time, the power used to transmit at least one SL-PRS per resource unit / resource block / subchannel / subband is constant.

[0144] For a shared resource pool, the puncturing domain of the UE may not be fixed. Puncturing may be performed on one or more flexible frequency domains or granularities, which may have higher bandwidth efficiency and more flexible SL-PRS transmission puncturing.

[0145] Fig.17is a schematic diagram showing an example of SL-PRS fixed puncturing in a shared resource pool according to various embodiments. The puncturing granularity may be a subchannel based on the resource pool granularity. A puncturing may include / comprise one or more consecutive subchannels based on PSSCH or other conflicts / reservations. In some embodiments, one or more puncturing may be performed using the SL-PRS. A SL-PRS1 transmission may have one puncturing because one PSSCH transmission is reserved.

[0146] In order to make SL-PRS have the same actual bandwidth, for SL-PRS2, the puncturing frequency can be higher than the reserved frequency of PSSCH, and the puncturing frequency of SL-PRS2 can be the same as SL-PRS1. For SL-PRS3, the UE can know / realize that there is no PSSCH transmission or reservation. Therefore, SL-PRS3 may not be punctured. The actual bandwidth of SL-PRS3 can be greater than the actual bandwidth of SL-PRS1 and SL-PRS2.

[0147] For SL-PRS repetition, periodic transmission, or different SL-PRS in a resource pool, the actual bandwidth of the SL-PRS may be the same or different. For flexible puncturing of SL-PRS, puncturing of different total frequency lengths of these SL-PRS may cause power control problems. There are two solutions to this problem.

[0148] Case 1: In a time slot or a time opportunity, the total power is constant. This may mean / indicate that the more puncturing of an SL-PRS is, the higher the power of the non-puncturing part may be. In a time slot or a time opportunity, the total power used to send at least one SL-PRS is constant.

[0149] Case 2: In a time slot or a time, the power of each RE / RB / subchannel is constant. This may mean / indicate that the more a SL-PRS is punctured, the total power of the SL-PRS may be reduced / lowered / reduced. In a time slot or a time, the power used to transmit at least one SL-PRS per resource unit / resource block / subchannel / subband is constant.

[0150] Example 10

[0151] For fixed puncturing or flexible puncturing of SL-PRS, the puncturing information may be known to the SL-PRS receiving UE. The transmitting UE may notify these messages contained / included in the higher layer or physical layer.

[0152] For example, a fixed puncturing candidate region may be included in a high layer. The physical layer may indicate which puncturing index to use. For flexible puncturing, one or more SCIs may indicate puncturing information, including puncturing / discarding resources and / or remaining resources and / or original resources of the SL-PRS.

[0153] The puncturing information may include / comprise at least one of the following: a puncturing indicator (e.g., whether to puncture); a puncturing type (e.g., fixed puncturing or flexible puncturing); a puncturing number (e.g., a puncturing number); a puncturing length (list)-time domain (e.g., a puncturing length (list)); a puncturing start symbol (list)-time domain (e.g., a start symbol (time slot or other time granularity)); a puncturing end symbol (list)-time domain (e.g., an end symbol (time slot or other time granularity)); a puncturing length (list)-frequency domain (e.g., a puncturing length (list)); a puncturing start subchannel ( (list)-frequency domain (e.g., starting symbol (time slot or other frequency granularity)); puncturing end subchannel (list)-frequency domain (e.g., ending symbol (time slot or other frequency granularity)); puncturing TRIV (list) (e.g., one or more puncturing positions in the time domain); puncturing FRIV (list) (e.g., one or more puncturing positions in the frequency domain); puncturing comb offset (e.g., indicating a comb pattern); puncturing query (e.g., the sending UE can ask the receiving UE for puncturing information (whether puncturing is allowed)); or puncturing report (e.g., answering a puncturing query). One or more of these components can be used for puncturing / discarded resources and / or remaining resources and / or original resources of SL-PRS.

[0154] The puncturing trigger can be triggered by an explicit request or by a condition other than an explicit request. For an explicit request, the UE can include the request in the SCI or higher layers (MAC CE, SLPP). For the case triggered by a condition (e.g., based on the mode 2 perception method), the UE can select x% (e.g., 20%) of the resources for SL-PRS transmission, even if these 20% of the resources may conflict (e.g., based on mode 2 perception, these 20% are more suitable than the other 80%). SL-PRS can have a larger frequency domain than PSSCH. These 20% of resources may conflict with PSSCH.

[0155] Solution 1: According to the RSRP threshold obtained by 20% of the resources and the maximum RSRP limit threshold, puncturing may be triggered (for example, if the RSRP threshold of 20% is higher than the maximum RSRP limit threshold).

[0156] Solution 2: Based on the first random transmission of SL-PRS, the UE can determine whether there is a conflict. If there is a conflict, puncturing can be triggered on the selected resource region. If there is no conflict, puncturing may not be triggered on the selected resource region.

[0157] Solution 3: Based on the collision risk (CR) / collision-to-bandwidth ratio (CBR) in the resource pool. For dedicated resources, CR / CBR can be included. For shared resource pools, CR / CBR can take into account the impact of SL-PRS.

[0158] When the UE receives the SL-PRS based on the SCI, the UE may decode the SCI and / or may obtain / obtain / determine puncturing information from the SCI or a higher layer. Based on the puncturing information, the UE may receive / determine information about the SL-PRS.

[0159] For example, the receiving UE may receive the SL-PRS by using a 1-bit indicator in the SCI and acquiring puncturing information from the SCI of other UEs (eg, SCI 2C of an inter-UE coordination (IUC) UE, which may include the receiving UE).

[0160] Embodiment 11

[0161] For the scheme about puncturing, its main purpose is to avoid possible conflicts. For UEs that can send SL-PRS (or other signals / CH), the UE can obtain conflict / reservation information according to the sensing scheme. The conflict / reservation information can come from inter-UE coordination (IUC). Fig.18 is a schematic diagram showing an example of an inter-UE coordination (IUE) scheme for SL data according to various embodiments. For SL-PRS transmission, inter-UE coordination (IUC) may be introduced.

[0162] Fig.18 The process of (re)selecting SL data (PSCCH / PSSCH / PSFCH) resources (or SL-PRS resources) is shown. Based on UE A's IUC report on conflict / reservation information of SL data (PSCCH / PSSCH / PSFCH) or SL-PRS, UE B can send SL-PRS (or SL data) to other UEs (for example, UE A can also be a receiving UE) through the puncturing information indicated by the SCI.

[0163] For dedicated resource pools, the coordinating UE can provide information about SL-PRS transmission. For comb patterns of SL-PRS, inter-UE coordination can provide comb RE offsets as puncturing information. UEs can puncture selected resources based on conflict / reservation information perceived by the IUC or the transmitting UE.

[0164] For a shared resource pool, the coordinating UE may provide information about SL-PRS and PSSCH or other RS / CH transmissions. Based on this information, the transmitting UE may puncture and / or notify the receiving UE of the puncturing information via the SCI.

[0165] It should be understood that one or more features of the above-described embodiments are not limited to a particular embodiment, but may be combined in any manner (eg, in any priority and / or order, concurrently or otherwise).

[0166] Fig.19 1-1 shows a flowchart of side link positioning according to an embodiment of the present disclosure. Fig.18 In some embodiments, the method 1900 may be performed by a first wireless communication device. According to different embodiments, more, fewer, or different operations may be performed in the method 1900. Operations of at least one aspect may involve a system, method, apparatus, or computer-readable medium.

[0167] Some embodiments of the present disclosure relate to systems, methods, apparatuses, and non-transitory computer-readable media related to sending a message from a first wireless communication device (e.g., a transmitting UE) to a second wireless communication device (e.g., a receiving UE). The message can be used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more sidelink positioning reference signals (SL-PRS) from a resource pool.

[0168] Some embodiments of the present disclosure relate to systems, methods, apparatuses, and non-transitory computer-readable media related to receiving a message from a first wireless communication device by a second wireless communication device, wherein the message can be used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more sidelink positioning reference signals (SL-PRS) from a resource pool.

[0169] Although multiple embodiments of the present invention have been described above, it should be understood that they are presented only in an exemplary and not limiting manner. Similarly, various figures may depict example architectures or configurations, which are provided so that those of ordinary skill in the art can understand the exemplary features and functions of the present invention. However, such personnel will understand that the present invention is not limited to the example architectures or configurations shown, but can use a variety of alternative architectures and configurations to implement the present invention. In addition, as those of ordinary skill in the art will understand, one or more features of some embodiments may be combined with one or more features of another embodiment described herein. Therefore, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

[0170] It should also be understood that any reference to an element herein using names such as "first," "second," etc. does not generally limit the number or order of those elements. Rather, these names may be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to a first element and a second element does not mean that only two elements can be used, or that the first element must be located before the second element in some manner.

[0171] In addition, those of ordinary skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, and symbols such as those referenced in the description above may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0172] It will be further understood by those of ordinary skill in the art that any of the various schematic logic blocks, modules, processors, devices, circuits, methods, and functions described in conjunction with the aspects disclosed herein may be implemented by electronic hardware (e.g., digital implementations, analog implementations, or a combination of the two), firmware, various forms of design code or programs containing instructions (for convenience, may be referred to herein as "software" or "software modules"), or any combination of these technologies. In order to clearly illustrate this interchangeability of hardware, firmware, and software, various schematic components, blocks, modules, circuits, and steps have been described above generally according to their functions. Whether such functionality is implemented as hardware, firmware, or software, or a combination of these technologies, depends on the specific application and the design constraints imposed on the overall system. Technicians may implement the described functionality in various ways for each specific application, but such implementation decisions will not cause a departure from the scope of the present disclosure.

[0173] In addition, it will be understood by those of ordinary skill in the art that the various illustrative logic blocks, modules, devices, components and circuits described herein may be implemented within or performed by an integrated circuit (IC), which may include: a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logic blocks, modules and circuits may further include antennas and / or transceivers to communicate with various components within a network or within a device. The general purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration to perform the functions described herein.

[0174] If the function is implemented in software, the function can be stored as one or more instructions or codes on a computer-readable medium. Therefore, the steps of the method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media include both computer storage media and communication media, and communication media include any media that can enable a computer program or code to be transferred from one place to another. The storage medium can be any available medium that a computer can access. By way of example and in a non-limiting manner, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium that can be used to store desired program codes in the form of instructions or data structures and can be accessed by a computer.

[0175] In this document, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. In addition, for the purpose of discussion, various modules are described as discrete modules; however, it is obvious to those of ordinary skill in the art that two or more modules can be combined to form a single module that performs the associated functions according to embodiments of the present invention.

[0176] In addition, memory or other storage devices and communication components can be used in embodiments of the present invention.It should be understood that, for the sake of clarity, the above description has described embodiments of the present invention with reference to different functional units and processors.However, it will be apparent that any appropriate functional distribution between different functional units, processing logic elements or domains can be used without departing from the present invention.For example, the function illustrated as being performed by a separate processing logic element or controller can be performed by the same processing logic element or controller.Therefore, reference to a specific functional unit is only a reference to an appropriate device for providing the described function, rather than indicating a strict logical or physical structure or organization.

[0177] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of this disclosure. Therefore, this disclosure is not intended to be limited to the embodiments shown herein, but is to be given the widest scope consistent with the novel features and principles disclosed herein, as set forth in the claims below.

Claims

1. A wireless communication method, comprising: The first wireless communication device sends a message to the second wireless communication device; The message is used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more side link positioning reference signals SL-PRS from a resource pool.

2. The wireless communication method according to claim 1, wherein: The pattern of the one or more SL-PRS is preconfigured in one of the following layers: radio resource connection RRC layer, side link positioning protocol SLPP, PC5 radio resource control PC5-RRC, PC5 signaling PC5-S, medium access control MAC layer, or application layer.

3. The wireless communication method according to claim 1, wherein: The message includes one or more side link control information SCI messages.

4. The wireless communication method according to claim 3, wherein: The one or more SCI messages are used to indicate: the frequency domain resources and / or time domain resources of the SL-PRS, the frequency domain resources and / or time domain resources of at least one SL-PRS to be punctured, the remaining frequency domain resources and / or remaining time domain resources of the SL-PRS after puncturing, or the frequency domain resources and / or time domain resources of the PSSCH.

5. The wireless communication method according to claim 3, wherein: The transmission candidate positions of the one or more SCI messages are mapped to the positions of the frequency domain resources and / or the positions of the time domain resources corresponding to the one or more SL-PRSs.

6. The wireless communication method according to claim 3, wherein: The transmission candidate position of at least one of the one or more SCI messages is preconfigured.

7. The wireless communication method according to claim 3, wherein: The one or more SL-PRSs are frequency domain multiplexed.

8. The wireless communication method according to claim 3, wherein: The one or more SCI messages explicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

9. The wireless communication method according to claim 8, wherein: The frequency domain resources corresponding to the SL-PRS preconfigured by the one or more SCI messages include at least one of the following items: one or more resource unit RE offsets, one or more symbol / time slot offsets, one or more sub-channel offsets, or one or more frequency indexes.

10. The wireless communication method according to claim 3, wherein: The one or more SCI messages implicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

11. The wireless communication method according to claim 10, wherein: The one or more SCI messages have a preconfigured mapping relationship with the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

12. The wireless communication method according to claim 1, wherein: The message is preconfigured to determine one of a plurality of patterns preconfigured to the plurality of SL-PRSs, and wherein the pattern is preconfigured in one of the following layers: RRC layer, SLPP, PC5-RRC, PC5-S, MAC layer, or application layer.

13. The wireless communication method according to claim 12, wherein: The message includes one or more side link control information SCI messages.

14. The wireless communication method according to claim 12, wherein: The one or more SCI messages explicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

15. The wireless communication method according to claim 14, wherein: The frequency domain resources corresponding to the SL-PRS preconfigured by the one or more SCI messages include at least one of the following items: one or more RE offset lists, one or more sub-channel offset lists, or one or more frequency index lists.

16. The wireless communication method according to claim 12, wherein: The one or more SCI messages implicitly configure the frequency domain resources and / or time domain resources corresponding to the SL-PRS.

17. The wireless communication method according to claim 16, wherein: The one or more SCI messages have a preconfigured mapping relationship with the frequency domain resources and / or time domain resources of the SL-PRS.

18. The wireless communication method according to any one of claims 2 to 17, wherein: The frequency domain resources of the SL-PRS are the same.

19. The wireless communication method according to claim 1, wherein: The bandwidth lists corresponding to the multiple SL-PRSs are preconfigured in one of the following layers: RRC layer, SLPP, PC5-RRC, PC5-S, MAC layer, or application layer.

20. The wireless communication method according to claim 1, wherein: The message is preconfigured to indicate a corresponding bandwidth for each SL-PRS.

21. The wireless communication method according to any one of claims 19 or 20, wherein: The message includes one or more side link control information SCI messages.

22. The wireless communication method according to claim 1, wherein: The frequency domain resources of each of the SL-PRSs are continuous or discontinuous, and the granularity of the frequency domain resources is in units of resource units, resource blocks, subchannels, or interleaving indexes.

23. The wireless communication method according to claim 1, wherein: The difference between the time domain resources of each of the SL-PRSs and the time domain resources of the corresponding PSSCH transmission carrying the SL-PRS related information is limited, and wherein the SL-PRS related information includes at least one of the SL-PRS configuration information and / or the SL-PRS measurement results.

24. The wireless communication method according to claim 4, wherein: The message is also used to indicate whether the frequency domain resources and / or time domain resources used to receive or send the at least one SL-PRS are punctured, and wherein the punctured frequency domain resources and / or time domain resources can be determined by at least one of: the first wireless communication device, the second wireless communication device, or a third wireless communication device different from the first wireless communication device or the second wireless communication device.

25. The wireless communication method according to any one of claims 1 or 4, wherein: The message is also preconfigured to indicate puncturing information, wherein the puncturing information includes at least one of the following: a puncturing indicator, a puncturing type, a puncturing number, a puncturing frequency length, a puncturing frequency starting point, a puncturing duration, a puncturing time starting point, a puncturing offset, a puncturing time domain resource indication value TRIV, a puncturing frequency domain resource indication value FRIV, a puncturing query, a puncturing resource location indicator, or a puncturing report.

26. The wireless communication method according to claim 25, wherein: The puncturing information is determined by the first wireless communication device, or by a third wireless communication device different from the first wireless communication device or the second wireless communication device.

27. The wireless communication method according to claim 24, wherein: The location of the frequency domain resources and / or time domain resources of the at least one SL-PRS to be punctured is configurable or preconfigured.

28. The wireless communication method according to any one of claims 24 to 27, wherein: The remaining frequency domain resources and / or remaining time domain resources of the punctured SL-PRS are preconfigured to be received by the second wireless communication device.

29. The wireless communication method according to any one of claims 27 to 28, wherein: In one time slot or one opportunity, the total power used to send the at least one SL-PRS is constant.

30. The wireless communication method according to any one of claims 27 to 28, wherein: In one time slot or one opportunity, the power used for transmitting the at least one SL-PRS per resource unit / resource block / subchannel / subband is constant.

31. A wireless communication method, comprising: receiving, by the second wireless communication device, a message from the first wireless communication device; The message is used by the second wireless communication device to determine frequency domain resources and / or time domain resources corresponding to one or more side link positioning reference signals SL-PRS from a resource pool.

32. The wireless communication method according to claim 31, wherein: The message includes one or more side link control information SCI messages.

33. The wireless communication method according to claim 31, wherein: The one or more SL-PRSs are frequency domain multiplexed.

34. The wireless communication method according to claim 33, further comprising: receiving, by the second wireless communication device, at least one of the one or more SL-PRSs based on a corresponding multiplexing index; and The at least one SL-PRS is received by the second wireless communication device.

35. The wireless communication method according to claim 32, wherein: The one or more SCI messages are used to indicate: the frequency domain resources and / or time domain resources of the SL-PRS, the frequency domain resources and / or time domain resources of at least one SL-PRS to be punctured, the remaining frequency domain resources and / or remaining time domain resources of the SL-PRS after puncturing, or the frequency domain resources and / or time domain resources of the PSSCH.

36. The wireless communication method according to claim 35, further comprising: receiving, by the second wireless communication device, another SCI message from a third wireless communication device, the another SCI message being based on at least one of the one or more SCI messages and / or based on a report sent by the third wireless communication device; and The at least one SL-PRS is received by the second wireless communication device.

37. A wireless communication device, comprising a processor and a memory, wherein: The processor is preconfigured to read code from the memory and execute the method according to any one of claims 1 to 36.

38. A computer program product comprising computer readable program medium code stored thereon, which, when executed by a processor, causes the processor to perform the method of any one of claims 1 to 36.

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