Method for aperiodic positioning reference signal transmission

Abstract

A method of wireless communication is disclosed for use in a wireless terminal. The method includes receiving, from a network entity, a terminal configuration associated with aperiodic positioning reference signals (PRSs), receiving, from a serving node of the wireless terminal, downlink control information (DCI) triggering at least one aperiodic PRS, and receiving the at least one aperiodic PRS based on the received DCI and the terminal configuration.

Description

[0001] This document relates generally to wireless communications.

[0002] In existing fifth-generation (5G) New Radio (NR) systems, the downlink positioning reference signal (DL PRS) only supports periodic transmission, resulting in several drawbacks. For example, DL PRS, which only supports periodic transmission, is not power- and resource-efficient and cannot adapt to mobile user equipment (UE). In addition, the inability to dynamically update quasi-co-location (QCL) information leads to increased communication failures. Furthermore, using DL PRS makes it difficult to meet temporary requirements of UEs, such as low-latency positioning or instantaneous higher positioning accuracy.

[0003] Therefore, how to improve the disadvantages caused by the DL PRS supporting only periodic transmission will be discussed.

[0004] This document relates to methods, systems, and devices for transmitting one or more aperiodic positioning reference signals.

[0005] The present disclosure relates to a wireless communication method used in a wireless terminal. The wireless communication method includes:

[0006] receiving a terminal configuration associated with an aperiodic positioning reference signal (PRS) from a network entity,

[0007] receiving downlink control information DCI triggering at least one aperiodic PRS from a serving node of the wireless terminal, and

[0008] At least one aperiodic PRS is received based on the received DCI and a terminal configuration associated with the aperiodic PRS.

[0009] Various embodiments may preferably implement the following features:

[0010] Preferably, the terminal configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, node ID information, a PRS resource set ID, or a PRS resource ID.

[0011] Preferably, the terminal configuration is received via a serving node of the wireless terminal.

[0012] Preferably, the terminal configuration is transparent to the service node.

[0013] Preferably, the wireless communication method further comprises transmitting a request command for the aperiodic PRS to a network entity or a serving node.

[0014] Preferably, the request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

[0015] Preferably, the DCI includes a field triggering at least one aperiodic PRS, wherein the field indicates at least one of triggering state ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information, or quasi co-location information.

[0016] Preferably, the at least one time of receiving the at least one aperiodic PRS is determined based on a time of receiving the DCI triggering the at least one aperiodic PRS and at least one PRS offset corresponding to the at least one aperiodic PRS.

[0017] Preferably, the time of receiving a PRS transmitted by the serving node other than the at least one aperiodic PRS is after the time of receiving the DCI triggering the at least one aperiodic PRS plus a PRS offset corresponding to the PRS transmitted by the serving node other than the at least one aperiodic PRS.

[0018] Preferably, the time of receiving a PRS transmitted by the neighboring node other than the at least one aperiodic PRS is after the time of the virtual DCI plus a PRS offset corresponding to the PRS transmitted by the neighboring node other than the at least one aperiodic PRS, wherein the time of the virtual DCI is determined based on the time of receiving the DCI triggering the at least one aperiodic PRS and at least one of a subframe offset or a system frame number offset between the serving node and the neighboring node.

[0019] Preferably, the at least one aperiodic PRS is received within at least one measurement gap in at least one measurement gap repetition period.

[0020] Preferably, a time gap between the time of receiving the DCI and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold value.

[0021] Preferably, the time associated with the earliest PRS of the at least one aperiodic PRS triggered by the DCI is selected based on one of a capability of the wireless terminal, a start time of a measurement gap in which the earliest PRS of the at least one aperiodic PRS triggered by the DCI is located, or a time of receiving the earliest PRS of the at least one aperiodic PRS triggered by the DCI.

[0022] The present disclosure relates to a wireless communication method for use in a network entity, the wireless communication method comprising:

[0023] transmitting, to a wireless terminal, a terminal configuration associated with an aperiodic positioning reference signal, PRS, and

[0024] A node configuration associated with the aperiodic PRS is transmitted to each of the wireless terminal's serving node and at least one neighboring node.

[0025] Various embodiments may preferably implement the following features:

[0026] Preferably, at least one of the terminal configuration or the node configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, node ID information, a PRS resource set ID, or a PRS resource ID.

[0027] Preferably, the terminal configuration is transmitted via a serving node of the wireless terminal.

[0028] Preferably, the terminal configuration is transparent to the service node.

[0029] Preferably, the wireless communication method further comprises receiving a request command for an aperiodic PRS from the wireless terminal, and transmitting information associated with at least one aperiodic PRS for the wireless terminal to a serving node of the wireless terminal.

[0030] Preferably, the wireless communication method further comprises transmitting a request command for the aperiodic PRS to the serving node.

[0031] Preferably, the request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

[0032] The present disclosure relates to a wireless communication method used in a service node. The wireless communication method includes:

[0033] receiving a node configuration associated with an aperiodic positioning reference signal (PRS) from a network entity, and

[0034] Downlink control information (DCI) triggering at least one aperiodic PRS is transmitted to the wireless terminal.

[0035] Various embodiments may preferably implement the following features:

[0036] Preferably, the node configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, node ID information, a PRS resource set ID, or a PRS resource ID.

[0037] Preferably, the DCI includes a field for triggering at least one non-periodic PRS, wherein the field indicates at least one of triggering status ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information or quasi-co-location information.

[0038] Preferably, the wireless communication method further comprises receiving a terminal configuration of the aperiodic PRS associated with the wireless terminal from a network entity, and transmitting the terminal configuration to the wireless terminal.

[0039] Preferably, the terminal configuration is transparent to the service node.

[0040] Preferably, the wireless communication method further comprises receiving a request command for the aperiodic PRS from the wireless terminal or the network entity.

[0041] Preferably, the request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

[0042] Preferably, the wireless communication method further comprises receiving information associated with at least one aperiodic PRS from a network entity.

[0043] Preferably, the wireless communication method further comprises transmitting, to at least one neighboring node, information associated with at least one PRS transmitted by the at least one neighboring node other than the at least one aperiodic PRS.

[0044] The present disclosure relates to a wireless terminal. The wireless terminal includes a communication unit configured to:

[0045] receiving a terminal configuration associated with an aperiodic positioning reference signal (PRS) from a network entity,

[0046] receiving downlink control information DCI triggering at least one aperiodic PRS from a serving node of the wireless terminal, and

[0047] At least one aperiodic PRS is received based on the received DCI and a terminal configuration associated with the aperiodic PRS.

[0048] Various embodiments may preferably implement the following features:

[0049] Preferably, the wireless terminal further includes a processor configured to execute the wireless communication method described in any one of the above methods.

[0050] The present disclosure relates to a network entity. The network entity includes a communication unit, which is configured to:

[0051] transmitting a terminal configuration associated with an aperiodic positioning reference signal (PRS) to a wireless terminal, and

[0052] A node configuration associated with the aperiodic PRS is transmitted to each of the wireless terminal's serving node and at least one neighboring node.

[0053] Various embodiments may preferably implement the following features:

[0054] Preferably, the network entity further includes a processor configured to execute the wireless communication method described in any one of the above methods.

[0055] The present disclosure relates to a service node. The service node includes a communication unit configured to:

[0056] receiving a node configuration associated with an aperiodic positioning reference signal (PRS) from a network entity, and

[0057] Downlink control information (DCI) triggering at least one aperiodic PRS is transmitted to the wireless terminal.

[0058] Various embodiments may preferably implement the following features:

[0059] Preferably, the service node further includes a processor configured to execute any one of the wireless communication methods described above.

[0060] The present disclosure relates to a computer program product, which includes a computer-readable program medium code stored thereon. When the code is executed by a processor, the processor implements any one of the wireless communication methods described above.

[0061] The exemplary embodiments disclosed herein are intended to provide features that will become apparent with reference to the following description when taken in conjunction with the accompanying drawings. According to various embodiments, exemplary 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 not limitation, and that various modifications may be made to the disclosed embodiments while remaining within the scope of the present disclosure as will be apparent to those skilled in the art reading this disclosure.

[0062] Therefore, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. In addition, the specific order and / 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 can be rearranged while remaining within the scope of the present disclosure. 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 example order, and unless otherwise expressly stated, the present disclosure is not limited to the specific order or hierarchy presented.

[0063] These and other aspects and embodiments thereof are described in more detail in the drawings, the description, and the claims.

[0064] Figure 1 An example of a schematic diagram of a wireless terminal according to an embodiment of the present disclosure is shown.

[0065] Figure 2 An example of a schematic diagram of a wireless network node according to an embodiment of the present disclosure is shown.

[0066] Figure 3 A schematic diagram of a network according to an embodiment of the present disclosure is shown.

[0067] Figure 4 A schematic diagram illustrating fields in downlink control information for triggering an aperiodic downlink positioning reference signal according to an embodiment of the present disclosure is shown.

[0068] Figure 5 A schematic diagram illustrating fields in downlink control information for triggering an aperiodic downlink positioning reference signal according to an embodiment of the present disclosure is shown.

[0069] Figure 6 A timing diagram of signals transmitted / received by a serving node and a neighboring node according to an embodiment of the present disclosure is shown.

[0070] Figure 7 A timing diagram of signals transmitted / received by a serving node and a neighboring node according to an embodiment of the present disclosure is shown.

[0071] Figure 8 A timing diagram of a measurement gap pattern according to an embodiment of the present disclosure is shown.

[0072] Figure 9 A timing diagram of a measurement gap pattern according to an embodiment of the present disclosure is shown.

[0073] Figure 10 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0074] Figure 11 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0075] Figure 12 A flow chart illustrating a process according to an embodiment of the present disclosure is shown.

[0076] Figure 1A schematic diagram of a wireless terminal 10 according to an embodiment of the present disclosure is provided. The wireless terminal 10 may be a user equipment (UE), a mobile phone, a laptop, a tablet, an e-book, or a portable computer system, and is not limited thereto. The wireless terminal 10 may include a processor 100 such as a microprocessor or an application-specific integrated circuit (ASIC), a storage unit 110, and a communication unit 120. The storage unit 110 may be any data storage device that stores program code 112 accessed and executed by the processor 100. Embodiments of the storage unit 112 include, but are not limited to, a subscriber identity module (SIM), a read-only memory (ROM), a flash memory, a random access memory (RAM), a hard disk, and an optical data storage device. The communication unit 120 may be a transceiver and is used to send and receive signals (e.g., messages or data packets) based on the processing results of the processor 100. In an embodiment, the communication unit 120 communicates with the user via Figure 1 At least one antenna 122 is shown for transmitting and receiving signals.

[0077] In an embodiment, the storage unit 110 and the program code 112 may be omitted, and the processor 100 may include the storage unit with the stored program code.

[0078] The processor 100 may implement any one of the steps of the exemplary embodiments on the wireless terminal 10 , for example, by executing the program code 112 .

[0079] The communication unit 120 may be a transceiver. Alternatively or additionally, the communication unit 120 may be combined into a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless network node (eg, a base station), respectively.

[0080] Figure 2A schematic diagram of a radio network node 20 according to an embodiment of the present disclosure is provided. The radio network node 20 may be a satellite, a base station (BS), a network entity, a mobility management entity (MME), a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), a radio access network (RAN) node, a next generation RAN (NG-RAN), a data network, a core network, or a radio network controller (RNC), but is not limited thereto. Furthermore, the radio network node 20 may include (or execute) at least one network function, such as an access and mobility management function (AMF), a session management function (SMF), a user plane function (UPF), a policy control function (PCF), an application function (AF), a location management function (LMF), etc. The radio network node 20 may include a processor 200 (such as a microprocessor or an ASIC), a memory unit 210, and a communication unit 220. The memory unit 210 may be any data storage device that stores program code 212 accessed and executed by the processor 200. Examples of the memory unit 212 include, but are not limited to, a SIM card, a ROM, a flash memory, a RAM, a hard disk, and an optical data storage device. The communication unit 220 may be a transceiver and is used to send and receive signals (eg, messages or data packets) according to the processing results of the processor 200. In an example, the communication unit 220 is connected via Figure 2 At least one antenna 222 is shown in FIG for transmitting and receiving signals.

[0081] In an embodiment, the storage unit 210 and the program code 212 may be omitted. The processor 200 may include a storage unit with stored program code.

[0082] The processor 200 may implement any of the steps described in the exemplary embodiments on the radio network node 20 , for example, via executing the program code 212 .

[0083] The communication unit 220 may be a transceiver. Alternatively or additionally, the communication unit 220 may be combined into a transmitting unit and a receiving unit configured to transmit and receive signals to and from a wireless terminal (eg, a user equipment), respectively.

[0084] Figure 3 Schematic diagram of a network according to an embodiment of the present disclosure is shown. Figure 3 In the example, the network includes a network entity, a UE, a serving node for the UE, and two neighboring nodes (i.e., neighboring node 1 and neighboring node 2). In an embodiment, the serving node and neighboring nodes 1 and 2 may be RAN nodes, base stations, or gNBs. In this embodiment, a downlink positioning reference signal (DL PRS) is configured based on the following procedure. Note that in this disclosure, the DL PRS may be equivalent to the PRS.

[0085] 1) DL PRS is configured to the UE by a network entity (e.g., LMF). In embodiments, the configuration of the DL PRS (e.g., DL PRS configuration) is communicated to the UE via a serving node and is transparent to the serving node of the UE.

[0086] 2) The network entity can also inform the serving node and neighboring nodes 1 and 2 of the DL PRS configuration. Note that each of the serving node and neighboring nodes 1 and 2 can only receive the DL PRS configuration related to itself.

[0087] 3) The UE receives the DL PRS configured by the network entity (e.g., LMF).

[0088] 4) In embodiments, the framework of the DL PRS configuration is shown below:

[0089] (1) The network entity can configure M frequency layers, where M is a positive integer. In embodiments, a single frequency layer is a set of DL PRS resource sets across one or more nodes (e.g., the serving node and / or neighboring nodes 1 and / or 2) that have the same subcarrier spacing (SCS), the same cyclic prefix (CP) type, the same center frequency, the same reference frequency point (e.g., point A), the same configured bandwidth (BW), and the same comb configuration (e.g., combSize). In embodiments, a frequency layer is identified by a frequency layer identification (ID).

[0090] (2) N nodes are configured under each frequency layer, where N is a positive integer, and the N nodes are identified by node ID information. Note that in this disclosure, a node can be equivalent to a neighboring node and / or a serving node.

[0091] (3) Each node configures a DL PRS resource set, where each DL PRS resource set is identified by a respective DL PRS resource set ID.

[0092] (4) In embodiments, a DL PRS resource is configured in each DL PRS resource set and is identified by a respective DL PRS resource ID.

[0093] In this disclosure, methods for aperiodic DL PRS transmission are disclosed. In embodiments, at least one of trigger state ID information, frequency layer ID information, node ID information, DL PRS resource set ID information, DL PRS resource ID information, transmission offset information, and path loss reference information, and quasi co-location (QCL) (related) information associated with aperiodic DL PRS can be dynamically determined (updated or overridden) by DL control information (DCI).

[0094] In this disclosure, trigger state ID information denotes information indicating at least one trigger state and / or at least one trigger state ID. Similarly, frequency layer ID information denotes information indicating at least one frequency layer and / or at least one frequency layer state ID, node ID information indicates at least one node (e.g., wireless network node, BS, RAN node, gNB, etc.) and / or at least one node ID, and so on.

[0095] In this disclosure, the method of configuring aperiodic DL PRS is exemplified in the following embodiments.

[0096] In an embodiment, the aperiodic DL PRS is configured by a network entity (e.g., LMF). In this embodiment, the configuration of aperiodic DL PRS (e.g., aperiodic DL PRS configuration) is communicated to the UE via the serving node of the UE and is transparent to the serving node. Furthermore, the configuration associated with each DL PRS can be uniquely identified by at least one of a frequency layer ID, node ID information, DL PRS set ID, and / or DL PRS resource ID. In an embodiment, the serving node of the UE and the neighboring nodes of the UE can also receive the aperiodic DL PRS configuration from the network entity. Note that each of the serving node and / or the neighboring nodes can only receive the configuration of aperiodic DL PRS that needs to be communicated by itself.

[0097] In an embodiment, the aperiodic DL PRS is configured by a network entity (e.g., LMF). In this embodiment, the configuration of aperiodic DL PRS (e.g., aperiodic DL PRS configuration) is communicated to the UE via the serving node of the UE and is transparent to the serving node. Furthermore, the configuration associated with each aperiodic DL PRS is packaged into a specific trigger state, where each trigger state is associated with at least one of a frequency layer ID, node ID information, DL PRS set ID, and / or DL PRS resource ID. In an embodiment, the serving node of the UE and the neighboring nodes of the UE can also receive the aperiodic DL PRS configuration from the network entity. Note that each of the serving node and / or the neighboring nodes can only receive the configuration of aperiodic DL PRS that needs to be communicated by itself.

[0098] In an embodiment, the aperiodic DL PRS is configured by the LMF. In this embodiment, the aperiodic DL PRS configuration is transmitted to the serving node, and the UE is notified of the aperiodic DL PRS configuration through RRC signaling from the serving node. That is, the serving node confirms the aperiodic DL PRS configuration associated with the UE. In addition, the configuration associated with each DL PRS in the aperiodic DL PRS configuration can be uniquely identified by at least one of the frequency layer ID, node ID information, DL PRS set ID and / or DL ​​PRS resource ID. In an embodiment, the serving node of the UE and the neighboring nodes of the UE can also receive the aperiodic DL PRS configuration from the network entity. Note that each of the serving node and / or the neighboring nodes can only receive the aperiodic DL PRS configuration associated with itself.

[0099] In an embodiment, the aperiodic DL PRS is configured by the LMF. In this embodiment, the aperiodic DL PRS configuration is transmitted to the serving node, and the UE is notified of the aperiodic DL PRS configuration through RRC signaling. In addition, the configuration associated with each DL PRS is packaged into a specific trigger state, where each trigger state is associated with at least one of a frequency layer ID, node ID information, a DL PRS set ID, and / or a DL PRS resource ID. In an embodiment, the serving node of the UE and the neighboring nodes of the UE may also receive the aperiodic DL PRS configuration from the network entity. Note that each of the serving node and / or the neighboring nodes may only receive the aperiodic DL PRS configuration associated with itself.

[0100] In the present disclosure, a method of triggering an aperiodic DL PRS is illustrated as follows.

[0101] In an embodiment, the aperiodic DL PRS may be triggered (e.g., requested) by the LMF. For example, the LMF may transmit some information (e.g., a request command) requesting the aperiodic DL PRS to be transmitted to the serving node and / or the neighboring node. Based on the information received from the network entity, the serving node transmits corresponding DCI to the UE to trigger the aperiodic DL PRS.

[0102] In an embodiment, an aperiodic DL PRS may be triggered (e.g., requested) by a UE. For example, the UE may transmit a request command to the LMF for triggering an aperiodic DL PRS, wherein the request command is transparent to the serving node. Based on the request command, the LMF transmits information associated with the aperiodic DL PRS (e.g., a request command) to the serving node and / or a neighboring node. Based on the information associated with the aperiodic DL PRS, the serving node transmits DCI to the UE for triggering the aperiodic DL PRS.

[0103] In an embodiment, the UE does not transmit a request command, and the serving node directly transmits DCI for triggering the aperiodic DL PRS. In addition, the serving node may also notify the neighboring node of information of the aperiodic DL PRS that the neighboring node needs to transmit. Note that each neighboring node may receive information of the aperiodic DL PRS that needs to be transmitted by itself. In an embodiment, the serving node may transmit the aperiodic DL PRS through a connection between the serving node and the neighboring node (e.g., Figure 3 The serving node and each of the neighboring nodes 1 and 2 are shown as dashed lines for communicating with the neighboring nodes.

[0104] In an embodiment, the UE requests an aperiodic DL PRS. In this embodiment, the UE transmits a request command to the serving node. Based on the request command, the serving node transmits corresponding DCI to the UE to trigger the aperiodic DL PRS. In addition, the serving node may also notify the neighboring nodes of the information of the aperiodic DL PRS that needs to be transmitted by the neighboring nodes. Note that each neighboring node may receive the information of the aperiodic DL PRS that needs to be transmitted by itself. In an embodiment, the serving node may transmit the aperiodic DL PRS to the neighboring nodes through the connection between the serving node and the neighboring nodes (e.g., Figure 3 The serving node and each of the neighboring nodes 1 and 2 are shown as dashed lines for communicating with the neighboring nodes.

[0105] In an embodiment, the request command may have at least one of the following information: (Note that the following information may not be applicable only to aperiodic DL PRS)

[0106] A) Frequency information of the (requested) aperiodic DL PRS (eg, information related to center frequency and / or bandwidth);

[0107] B) Node ID information;

[0108] C) periodicity of the (requested) DL PRS (e.g., periodic, periodic DL PRS, semi-persistent DL PLS, or aperiodic DL PRS);

[0109] D) beam information of the (requested) DL PRS (e.g., wider or narrower beam),

[0110] E) Suspend or continue the transmission of DL PRS.

[0111] In an embodiment, the DCI field for triggering a non-periodic DL PRS is associated with (e.g., indicates or includes) at least one of triggering state ID information, frequency layer ID information, node ID information, DL PRS set ID information, DL PRS resource ID information, transmission offset information and / or quasi co-location (QCL) information.

[0112] In an embodiment, each codepoint of the DCI field used to trigger the aperiodic DL PRS is associated with at least one triggering state ID. Figure 4 FIG2 shows a schematic diagram of a DCI field for triggering an aperiodic DL PRS according to an embodiment of the present disclosure. Figure 4 In the DCI field for triggering aperiodic DL PRS, 4 bits are included, and each code point (i.e., 4 bits) of the DCI field is associated with (e.g., indicates) a single triggering state. For example, code point "0001" may be associated with a triggering state with ID "1." Based on the DCI field for triggering aperiodic DL PRS, the DL PRS associated with the triggering state with ID "1" is triggered and transmitted to the UE.

[0113] In an embodiment, each code point of the DCI field that triggers the aperiodic DL PRS is associated with at least one frequency layer ID. Figure 4 As an example, each code point in the DCI field is associated with (eg, indicates) a single frequency layer ID. Based on the DCI field for triggering the aperiodic DL PRS, the DL PRS associated with the indicated frequency layer ID is triggered.

[0114] In an embodiment, the DCI field that triggers the aperiodic DL PRS may be associated with (e.g., indicates) at least one combination of frequency layer ID information and node ID information. In this embodiment, the DL PRS associated with the frequency layer ID indicated by the DCI field and the node ID corresponding to the indicated frequency layer ID is triggered. Figure 5 FIG. 1 shows a schematic diagram of a DCI field for triggering aperiodic DL PRS according to an embodiment of the present disclosure. Figure 5 In the DCI field that triggers the aperiodic DL PRS, the DCI field includes two frequency layer ID information 1 and 2 and their corresponding node ID information. Figure 5 , the DL PRS associated with the frequency layer ID information 1 and the node ID information corresponding to (eg, after) the frequency layer ID information 1 is triggered. Figure 5 As shown in the DCI field, a DL PRS associated with frequency layer ID information 2 and node ID information corresponding to (eg, after) frequency layer ID information 2 is triggered.

[0115] In an embodiment, the radio frame boundaries of different nodes may not be completely aligned. Therefore, there may be a reference node, and each neighboring node other than the reference node may determine the system frame number (SFN) offset and / or subframe offset by comparing its radio frame with the radio frame of the reference node. The definitions of SFN offset and subframe offset are as follows.

[0116] SFN Offset: The SFN offset of a neighbor node specifies the SFN offset at the node antenna location between the reference node and the neighbor node. The SFN offset corresponds to the number of complete radio frames counted from the start of radio frame #0 of the reference node to the start of the nearest subsequent radio frame #0 of the neighbor node.

[0117] Subframe Offset: The subframe offset of a neighbor node specifies the frame boundary offset at the node antenna location between the reference node and the neighbor node, counted across the entire subframe. The subframe offset is counted from the start of subframe #0 of the reference node to the start of the nearest subsequent subframe #0 of the neighbor node and rounded down to a multiple of a subframe.

[0118] In an embodiment, an aperiodic DL PRS offset is provided and defines a time offset between a DCI reception time (i.e., a time when DCI is received) and an aperiodic DL PRS reception time (i.e., a time when the UE (expects) to receive an aperiodic UL PRS). In an embodiment, the aperiodic DL PRS offset may be determined based on the DCI that triggers the aperiodic DL PRS (e.g., offset information included in the DCI). In an embodiment, the aperiodic DL PRS offset may be provided for each DL PRS resource or each DL PRS resource set.

[0119] In an embodiment, there is an offset between the subframe containing the DCI triggering the aperiodic DL PRS resource set and the subframe in which the first symbol of the aperiodic DL PRS resource set is received by the UE. In this embodiment, all time offset information is determined based at least on the node (i.e., the serving node) in which the DCI triggering the aperiodic DL PRS is transmitted. In an embodiment, the time offset information is included in the DCI.

[0120] Figure 6 FIG. 1 shows a timing diagram of signals transmitted by a serving node and a neighboring node according to an embodiment of the present disclosure. Figure 6 In this example, the reference node is the serving node. Specifically, the subframe offset between the serving node and the neighboring node is 2 subframes, and the SCS is 15KHz. Figure 6 As shown, the UE receives the DCI of the serving node in the fourth subframe (i.e., the subframe with subframe number = 4) in the frame with SFN = i. In this embodiment, the aperiodic DL PRS offset of the aperiodic DL PRS transmitted in the serving node is 3 subframes. In this case, the first symbol of the aperiodic DL PRS is transmitted in the 7th subframe (i.e., the subframe with subframe number = 7) in the frame with SFN = i.

[0121] In an embodiment, the UE assumes that a virtual DCI is received from a neighboring node in the second subframe (i.e., the subframe with subframe number = 2). Note that the subframe where the virtual DCI is located is determined by the position where the DCI that triggers the DL PRS is received and at least one of the subframe offset and / or SFN offset between the serving node and the neighboring node. For example, the subframe number of the subframe where the virtual DCI is assumed is determined by subtracting 2 (i.e., the subframe offset) from 4 (i.e., the subframe number of the subframe where the DCI is received). In addition, the virtual DCI is a reference for the UE to determine the time offset of the aperiodic DL PRS transmitted by the neighboring node. Figure 6 In the illustrated embodiment, the time offset of the aperiodic DL PRS associated with the neighboring node (i.e., the aperiodic DL PRS offset) is 4 subframes. Based on the assumption related to the virtual DCI, the UE can determine that the first symbol of the aperiodic DL PRS is transmitted in the 6th subframe (i.e., the subframe with subframe number = 2 (virtual DCI) + 4 (DL PRS offset)). In other words, the UE can receive or expect to receive the aperiodic DL PRS from the neighboring node in the 6th subframe.

[0122] In an embodiment, the SCS is greater than 15 KHz and one subframe may have more than one time slot. In this embodiment, the time slot in which the first symbol of the aperiodic DL PRS is transmitted may be determined by the subframe offset and the time slot offset within the subframe.

[0123] In an embodiment, the offset between the time slot containing the DCI triggering the aperiodic DL PRS and the time slot in which the first symbol of the aperiodic DL PRS is received from the serving node is determined. In this embodiment, all time offset information is determined based on at least information associated with the node (i.e., the serving node) in which the DCI triggering the aperiodic DL PRS resource set is transmitted.

[0124] Figure 7 FIG. 1 shows a timing diagram of signals transmitted by a serving node and a neighboring node according to an embodiment of the present disclosure. Figure 7 In this example, the reference node is the serving node. More specifically, the subframe offset between the serving node and the neighboring node is 2 subframes, the SCS is 30KHz, and each subframe includes 2 time slots. Figure 7 As shown, the UE receives the DCI triggering the aperiodic DL PRS in the first time slot of the 4th subframe (ie, the 7th time slot). In this embodiment, the time slot offset of the aperiodic DL PRS transmitted by the serving node is 4 time slots.

[0125] In an embodiment, the UE assumes that the virtual DCI is on the 2nd subframe based on the subframe in which the DCI triggering the aperiodic PRS is received by the UE and at least one of the subframe offset and / or SFN offset between the serving node and the neighboring node. For example, the subframe number of the subframe in which the virtual DCI is assumed is determined by subtracting 2 (i.e., the subframe offset) from 4 (i.e., the subframe number of the subframe in which the DCI is received). Note that the virtual DCI is assumed to be in the last time slot of the determined subframe (i.e., the 2nd time slot or the 4th time slot of the 2nd subframe). In this embodiment, the virtual DCI is a reference for the UE to determine the time slot in which the aperiodic DL PRS is transmitted by the neighboring node. In this embodiment, the time offset of the aperiodic DL PRS transmitted by the neighboring node is 5 time slots. Therefore, the DL PRS transmitted by the neighboring node is in the first time slot of the 4th subframe (i.e., the 9th time slot = the 4th time slot (virtual DCI) + 5 time slots (the time offset of the aperiodic DL PRS transmitted by the neighboring node)).

[0126] Because the bandwidth / center frequency / SCS of DL PRS may be different from the bandwidth / center frequency / SCS of the serving cell, DL PRS may be received by the UE only during measurement gaps. More specifically, the network may configure Figure 8 The measurement gap pattern is shown, where the length of the measurement gap is called the measurement gap length (MGL) and the periodicity of the measurement gap pattern is called the measurement gap repetition period (MGRP). In an embodiment, the time when the UE receives the aperiodic DL PRS may take into account the measurement gap configuration.

[0127] In an embodiment, it is desirable that the UE does not measure (eg, receive) the aperiodic DL PRS outside of a measurement gap.

[0128] In an embodiment, the aperiodic DL PRS triggered by the same DCI is received within the same measurement gap.

[0129] In an embodiment, aperiodic DL PRSs triggered by the same DCI are received within a measurement gap (eg, in different MGRPs).

[0130] In an embodiment, aperiodic DL PRSs associated with the same trigger state ID and triggered by the same DCI are received within a measurement gap (eg, in different MGRPs).

[0131] In an embodiment, aperiodic DL PRSs associated with the same trigger state ID and triggered by the same DCI are received within the same measurement gap.

[0132] In an embodiment, the aperiodic DL PRS associated with the same frequency layer ID and triggered by the same DCI are received within the measurement gap (e.g., in different MGRPs).

[0133] In an embodiment, the aperiodic DL PRS associated with the same frequency layer ID and triggered by the same DCI are received within the same measurement gap.

[0134] In an embodiment, the time of receiving the DCI for the aperiodic DL PRS (e.g., DCI reception time) and the time of reporting the measurement results of the aperiodic DL PRS (e.g., reporting time) can comply with at least one of the following rules:

[0135] 1) The UE is not expected to receive any DCI for triggering the aperiodic DL PRS within the measurement gap.

[0136] 2) Any measurement (result) feedback (e.g., reporting) based on the aperiodic DL PRS is transmitted after the aperiodic DL PRS reception and outside the measurement gap.

[0137] In an embodiment, the time of receiving the aperiodic DL PRS can have some restrictions. For example, the time gap between the time of receiving the DCI for triggering the aperiodic DL PRS and the start time of the measurement gap is not less than (i.e., greater than and / or equal to) a first threshold, where the earliest aperiodic DL PRS triggered by the DCI is located within the measurement gap. Alternatively or additionally, the time gap between the time of receiving the DCI for triggering the aperiodic DL PRS and the time of receiving the earliest aperiodic DL PRS triggered by the DCI is not less than (i.e., greater than and / or equal to) a second threshold.

[0138] In an embodiment, the first threshold and / or the second threshold are determined based on the UE capability.

[0139] In an embodiment, based on the UE capability, the UE can apply the restriction associated with at least one of the first threshold or the second threshold when receiving the aperiodic DL PRS.

[0140] Figure 9A timing diagram of a measurement gap pattern according to an embodiment of the present disclosure is shown. In this embodiment, the UE receives DCI for triggering an aperiodic DL PRS and the earliest aperiodic DL PRS triggered by the DCI is located in the next measurement gap. In an embodiment, the time gap T0 between the time of receiving the DCI for triggering the aperiodic DL PRS and the start time (i.e., the left boundary) of the next measurement gap is not less than (i.e., greater than or equal to) a threshold TH0. Alternatively or additionally, the time gap T1 between the time of receiving the DCI for triggering the aperiodic DL PRS and the time of receiving the earliest aperiodic DL PRS triggered by the DCI is less than (i.e., greater than or equal to) another threshold TH1. In an embodiment, the thresholds TH0 and / or TH1 are determined based on the UE capability. In an embodiment, based on the UE capability, the UE may consider limiting at least one of the time gaps T0 and T1 (e.g., T0 ≥ TH0 and / or T1 ≥ TH1).

[0141] In an embodiment, a reference node may be determined based on the DCI that triggers the aperiodic DL PRS. For example, the reference node may be a node corresponding to the lowest node ID within the triggering state indicated by the DCI that triggers the aperiodic DL PRS. Alternatively, the reference node may be a node corresponding to the lowest node ID within the frequency layer indicated by the DCI that triggers the aperiodic DL PRS. In an embodiment in which the DCI that triggers the aperiodic DL PRS indicating multiple frequency layers is triggered, the node corresponding to the lowest node ID within each frequency layer indicated by the DCI that triggers the aperiodic DL PRS is the reference node.

[0142] In an embodiment, aperiodic DL PRS may be indicated with a high priority. In this embodiment, reception of the aperiodic DL PRS may be prioritized over certain channels or signals. For example, when a signal / channel with a lower priority than the aperiodic DL PRS collides with the aperiodic DL PRS in the time domain within the MGL, the UE may only receive the aperiodic DL PRS.

[0143] Figure 10 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Figure 10 The process shown may be used in a wireless terminal (e.g., UE) and includes the following steps:

[0144] Step 1001: Receive terminal configuration associated with an aperiodic PRS from a network entity.

[0145] Step 1002: Receive DCI triggering at least one aperiodic PRS from a serving node of a wireless terminal.

[0146] Step 1003: Receive at least one aperiodic PRS based on the received DCI and the terminal configuration associated with the aperiodic PRS.

[0147] exist Figure 10 In the illustrated process, a wireless terminal receives a terminal configuration associated with an aperiodic PRS (e.g., an aperiodic PRS configuration or a configuration of an aperiodic PRS) from a network entity (e.g., a LMF). Furthermore, the wireless terminal may receive DCI triggering at least one aperiodic PRS from a serving node of the wireless terminal. Based on the received DCI and the terminal configuration, the wireless terminal receives at least one aperiodic PRS, for example, from the serving node and / or at least one neighboring node. In an embodiment, the wireless terminal may perform measurements (e.g., positioning) based on the received at least one aperiodic PRS.

[0148] In an embodiment, the terminal configuration associated with each aperiodic PRS includes (eg, indicates or is associated with) at least one of a trigger state identification ID, a frequency layer ID, node ID information, a PRS resource set ID, or a PRS resource ID.

[0149] In an embodiment, the terminal configuration is received via a serving node of the wireless terminal.In an embodiment, the terminal configuration is transparent to the serving node.

[0150] In an embodiment, the wireless terminal transmits a request command for an aperiodic PRS to a network entity or serving node.

[0151] In an embodiment, the request command includes at least one of frequency information of the (requested) aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the (requested) aperiodic PRS.

[0152] In an embodiment, the DCI includes a field for triggering at least one non-periodic PRS, wherein the field indicates at least one of triggering state ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information, or quasi-co-location information.

[0153] In an embodiment, at least one time of receiving the at least one aperiodic PRS is determined based on a time of receiving DCI triggering the at least one aperiodic PRS and at least one PRS offset corresponding to the at least one aperiodic PRS.

[0154] In an embodiment, the time of receiving the PRS transmitted by the serving node other than the at least one aperiodic PRS is after the time of receiving the DCI triggering the at least one aperiodic PRS plus a PRS offset corresponding to the PRS transmitted by the serving node other than the at least one aperiodic PRS.

[0155] In an embodiment, the time of receiving the PRS transmitted by the neighboring node other than the at least one aperiodic PRS is after the time of the virtual DCI plus the PRS offset corresponding to the PRS transmitted by the neighboring node other than the at least one aperiodic PRS, wherein the time of the virtual DCI is determined based on the time of receiving the DCI triggering the at least one aperiodic PRS and at least one of a subframe offset or a system frame number offset between the serving node and the neighboring node.

[0156] In an embodiment, at least one aperiodic PRS is received in at least one measurement gap in at least one measurement gap repetition period.

[0157] In an embodiment, a time gap between a time when the DCI is received and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold.

[0158] In an embodiment, the time associated with the earliest PRS of the at least one aperiodic PRS triggered by the DCI is selected based on one of a capability of the wireless terminal, a start time of a measurement gap in which the earliest PRS of the at least one aperiodic PRS triggered by the DCI is located, or a time at which the earliest PRS of the at least one aperiodic PRS triggered by the DCI is received.

[0159] Figure 11 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Figure 11 The process shown may be used in a network entity (e.g., LMF) and includes the following steps:

[0160] Step 1101: Transmit terminal configuration associated with an aperiodic PRS to a wireless terminal.

[0161] Step 1102: Transmit a node configuration associated with an aperiodic PRS to each of the serving node and at least one neighboring node.

[0162] exist Figure 11 In the illustrated process, the network entity transmits a terminal configuration associated with an aperiodic PRS to a wireless terminal (UE). In addition, the network entity also transmits a node configuration associated with an aperiodic PRS to each of the serving node and at least one neighboring node.

[0163] In an embodiment, the terminal configuration and / or node configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, a node ID information, a PRS resource set ID, or a PRS resource ID.

[0164] In an embodiment, the terminal configuration is transmitted via a serving node of the wireless terminal.

[0165] In an embodiment, terminal configuration is transparent to the service node.

[0166] In an embodiment, the network entity may receive a request command for an aperiodic PRS from the wireless terminal. Based on the request command, the network entity transmits information associated with at least one aperiodic PRS for the wireless terminal.

[0167] In an embodiment, the network entity transmits a request command for an aperiodic PRS to the serving node.

[0168] In an embodiment, the request command includes at least one of frequency information of the (requested) aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the (requested) aperiodic PRS.

[0169] Figure 12 A flow chart illustrating a process according to an embodiment of the present disclosure is shown. Figure 12 The process shown may be used in a wireless network node (e.g., a serving node for a wireless terminal) and includes the following steps:

[0170] Step 1201: Receive node configuration associated with an aperiodic PRS from a network entity.

[0171] Step 1202: Transmit a DCI triggering at least one aperiodic PRS to a wireless terminal.

[0172] exist Figure 12 In the illustrated process, a serving node receives a node configuration associated with an aperiodic PRS from a network entity (e.g., a LMF). Note that a serving node may only receive a node configuration for an aperiodic PRS associated with itself. In addition, the serving node transmits a DCI triggering at least one aperiodic PRS to a wireless terminal.

[0173] In an embodiment, the node configuration associated with each of the aperiodic PRSs is associated with at least one of a trigger state identification ID, a frequency layer ID, node ID information, a PRS resource set ID, or a PRS resource ID.

[0174] In an embodiment, the DCI includes a field for triggering at least one non-periodic PRS, wherein the field indicates at least one of triggering state ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information or quasi-co-location information.

[0175] In an embodiment, the serving node may receive a terminal configuration associated with an aperiodic PRS (associated with the wireless terminal) from a network entity and transmit (eg, forward) the terminal configuration to the wireless terminal.

[0176] In an embodiment, terminal configuration is transparent to the service node.

[0177] In an embodiment, the serving node receives a request command for an aperiodic PRS from one of a wireless terminal or a network entity.

[0178] In an embodiment, the request command includes at least one of frequency information of the (requested) aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the (requested) aperiodic PRS.

[0179] In an embodiment, the serving node receives information associated with at least one aperiodic PRS from a network entity.

[0180] In an embodiment, the serving node may transmit, to the at least one neighboring node, information associated with at least one aperiodic PRS transmitted by the at least one neighboring node other than the at least one aperiodic PRS.

[0181] Although various embodiments of the present disclosure have been described above, it should be understood that they are presented by way of example only and not by way of limitation. Similarly, various figures may depict example architectures or configurations, which are provided to enable those of ordinary skill in the art to understand the exemplary features and functions of the present disclosure. However, such personnel will understand that the present disclosure is not limited to the example architectures or configurations shown, but may use a variety of alternative architectures and configurations to implement the present disclosure. In addition, as those of ordinary skill in the art will understand, one or more features of an embodiment 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.

[0182] It should also be understood that any reference to an element herein using designations such as "first," "second," etc., does not generally limit the quantity or order of those elements. Rather, these designations may be used herein as a convenient means of distinguishing between two or more elements or examples of elements. Thus, a reference to a first and a second element does not mean that only two elements may be employed, or that the first element must precede the second element in some manner.

[0183] In addition, those skilled 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 voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0184] Those skilled in the art will further understand that any of the various illustrative logical blocks, units, 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 units"), or any combination of these technologies.

[0185] In order to clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, units, circuits and steps have been described above generally in terms of 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 entire system. Technicians can implement the described functionality in various ways for each specific application, but such implementation decisions do not cause a departure from the scope of this disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, units, etc. can be configured to perform one or more functions described herein. The terms "configured to" or "configured for" used herein with respect to a specified operation or function refer to that the processor, device, component, circuit, structure, machine, unit, etc. is physically constructed, programmed and / or arranged to perform the specified operation or function.

[0186] Furthermore, it will be understood by those skilled in the art that the various illustrative logic blocks, units, 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, units, and circuits may further include an antenna and / or a transceiver to communicate with various components within a network or within a device. A 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, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other suitable configuration to perform the functions described herein. If the functions are implemented in software, the functions may be stored as one or more instructions or codes on a computer-readable medium. Thus, the steps of the methods or algorithms disclosed herein may be implemented as software stored on a computer-readable medium.

[0187] 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 not limitation, such computer-readable media can 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 code in the form of instructions or data structures and that can be accessed by a computer.

[0188] In this document, the term "unit" 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 units are described as discrete units; however, it is obvious to those skilled in the art that two or more units can be combined to form a single unit that performs the associated functions according to the embodiments of the present disclosure.

[0189] In addition, memory or other storage devices and communication components may be used in embodiments of the present disclosure. It should be understood that, for clarity, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any appropriate distribution of functions between different functional units, processing logic elements or domains may be used without departing from the present disclosure. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic element or controller. Therefore, references to specific functional units are merely references to appropriate means for providing the described functions, rather than indicating a strict logical or physical structure or organization.

[0190] 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, the present disclosure is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as set forth in the broadest scope of the claims below.

Claims

1. A wireless communication method used in a wireless terminal, the wireless communication method comprising: receiving, from a network entity, terminal configurations associated with aperiodic positioning reference signals (PRSs), wherein the terminal configurations associated with each of the aperiodic PRSs include at least one of trigger state identification IDs, frequency layer IDs, or node ID information; receiving downlink control information (DCI) triggering at least one aperiodic PRS from a serving node of the wireless terminal, and The at least one aperiodic PRS is received based on the received DCI and the terminal configuration, wherein a time gap between a time when the DCI is received and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold determined according to wireless terminal capabilities.

2. The wireless communication method according to claim 1, wherein: The terminal configuration is received via a serving node of the wireless terminal.

3. The wireless communication method according to claim 1, wherein: The terminal configuration is transparent to the service node.

4. The wireless communication method according to any one of claims 1 to 3, further comprising: A request command for an aperiodic PRS is transmitted to the network entity or the serving node. The wireless communication method according to claim 4 , wherein: The request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

6. The wireless communication method according to any one of claims 1 to 3 and 5, wherein: The DCI includes a field for triggering the at least one non-periodic PRS, wherein the field indicates at least one of trigger status ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information, or quasi-co-location information.

7. The wireless communication method according to any one of claims 1 to 3 and 5, wherein: At least one time of receiving the at least one aperiodic PRS is determined based on a time of receiving DCI triggering the at least one aperiodic PRS and at least one PRS offset corresponding to the at least one aperiodic PRS.

8. The wireless communication method according to claim 7, wherein: The time of receiving the PRS transmitted by the serving node other than the at least one aperiodic PRS is after the time of receiving the DCI triggering the at least one aperiodic PRS plus a PRS offset corresponding to the PRS transmitted by the serving node other than the at least one aperiodic PRS.

9. The wireless communication method according to claim 7, wherein: The time of receiving the PRS transmitted by the neighboring node other than the at least one aperiodic PRS is after the time of the virtual DCI plus a PRS offset corresponding to the PRS transmitted by the neighboring node other than the at least one aperiodic PRS, The time of the virtual DCI is determined based on the time of receiving the DCI that triggers the at least one aperiodic PRS and at least one of a subframe offset or a system frame number offset between the serving node and the neighboring node.

10. The wireless communication method according to any one of claims 1 to 3, 5, 8 to 9, wherein: The at least one aperiodic PRS is received in at least one measurement gap in at least one measurement gap repetition period.

11. The wireless communication method according to claim 1, wherein: The time associated with the earliest PRS of the at least one aperiodic PRS triggered by the DCI is selected based on one of a capability of the wireless terminal, a start time of a measurement gap in which the earliest PRS of the at least one aperiodic PRS triggered by the DCI is located, or a time at which the earliest PRS of the at least one aperiodic PRS triggered by the DCI is received.

12. A wireless communication method used in a network entity, the wireless communication method comprising: transmitting a terminal configuration associated with an aperiodic positioning reference signal (PRS) to a wireless terminal, so that the wireless terminal receives the at least one aperiodic PRS according to the terminal configuration and downlink control information (DCI) triggering at least one aperiodic PRS, wherein a time gap between a time when the DCI is received and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold value determined according to wireless terminal capabilities, and A node configuration associated with an aperiodic PRS is transmitted to a serving node and each of at least one neighboring node of the wireless terminal, wherein at least one of the terminal configuration or the node configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, or a node ID information.

13. The wireless communication method according to claim 12, wherein: The terminal configuration is transmitted via a serving node of the wireless terminal.

14. The wireless communication method according to claim 13, wherein: The terminal configuration is transparent to the service node.

15. The wireless communication method according to any one of claims 12 to 14, further comprising: receiving a request command for the aperiodic PRS from the wireless terminal, and Information associated with at least one aperiodic PRS for the wireless terminal is transmitted to a serving node for the wireless terminal.

16. The wireless communication method according to any one of claims 12 to 14, further comprising: A request command for the aperiodic PRS is transmitted to the serving node.

17. The wireless communication method according to claim 15, wherein: The request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

18. A wireless communication method used in a service node, the wireless communication method comprising: receiving, from a network entity, node configurations associated with aperiodic positioning reference signals (PRSs), wherein the node configuration associated with each of the aperiodic PRSs comprises at least one of a trigger state identification (ID), a frequency layer ID, or node ID information; and Downlink control information (DCI) triggering at least one aperiodic PRS is transmitted to a wireless terminal, wherein a time gap between a time when the DCI is transmitted and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold determined according to a capability of the wireless terminal.

19. The wireless communication method according to claim 18, wherein: The DCI includes a field for triggering the at least one non-periodic PRS, wherein the field indicates at least one of trigger status ID information, frequency layer ID information, node ID information, resource set ID information, resource ID information, transmission offset information, path loss reference information, or quasi-co-location information.

20. The wireless communication method according to claim 18 or 19, further comprising: receiving, from the network entity, a terminal configuration of an aperiodic PRS associated with the wireless terminal, and The terminal configuration is transmitted to the wireless terminal.

21. The wireless communication method according to claim 20, wherein: The terminal configuration is transparent to the service node.

22. The wireless communication method according to any one of claims 18 to 19 and 21, further comprising: A request command for the aperiodic PRS is received from the wireless terminal or the network entity.

23. The wireless communication method according to claim 22, wherein: The request command includes at least one of frequency information of the aperiodic PRS, node ID information, periodicity information indicating the aperiodic PRS, or beam information of the aperiodic PRS.

24. The wireless communication method according to any one of claims 18 to 19, 21, and 23, further comprising: Information associated with the at least one aperiodic PRS is received from the network entity.

25. The wireless communication method according to any one of claims 18 to 19, 21, and 23, further comprising: Information associated with at least one PRS transmitted by the at least one neighboring node other than the at least one aperiodic PRS is transmitted to at least one neighboring node.

26. A wireless terminal comprising: A communication unit configured to: receiving, from a network entity, terminal configurations associated with aperiodic positioning reference signals (PRSs), wherein the terminal configurations associated with each of the aperiodic PRSs include at least one of trigger state identification IDs, frequency layer IDs, or node ID information; receiving downlink control information (DCI) triggering at least one aperiodic PRS from a serving node of the wireless terminal, and The at least one aperiodic PRS is received based on the received DCI and the terminal configuration, wherein a time gap between a time when the DCI is received and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold determined according to wireless terminal capabilities. 27 . The wireless terminal according to claim 26 , further comprising a processor configured to execute the wireless communication method according to claim 2 .

28. A network entity comprising: A communication unit configured to: transmitting a terminal configuration associated with an aperiodic positioning reference signal (PRS) to a wireless terminal, so that the wireless terminal receives the at least one aperiodic PRS according to the terminal configuration and downlink control information (DCI) triggering at least one aperiodic PRS, wherein a time gap between a time when the DCI is received and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold value determined according to a capability of the wireless terminal, and A node configuration associated with an aperiodic PRS is transmitted to a serving node and each of at least one neighboring node of the wireless terminal, wherein at least one of the terminal configuration or the node configuration associated with each of the aperiodic PRSs includes at least one of a trigger state identification ID, a frequency layer ID, or a node ID information.

29. The network entity according to claim 28, further comprising a processor configured to perform the wireless communication method according to any one of claims 13 to 17.

30. A service node, comprising: A communication unit configured to: receiving, from a network entity, node configurations associated with aperiodic positioning reference signals (PRSs), wherein the node configuration associated with each of the aperiodic PRSs comprises at least one of a trigger state identification (ID), a frequency layer ID, or node ID information; and Downlink control information (DCI) triggering at least one aperiodic PRS is transmitted to a wireless terminal, wherein a time gap between a time when the DCI is transmitted and a time associated with an earliest PRS of the at least one aperiodic PRS triggered by the DCI is greater than or equal to a threshold determined according to a capability of the wireless terminal.

31. The serving node according to claim 30, further comprising a processor configured to perform the wireless communication method according to any one of claims 19 to 25.

32. A computer program product comprising computer-readable program medium code stored thereon, which, when executed by a processor, causes the processor to implement the wireless communication method according to any one of claims 1 to 25.

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