Backward reference signal configuration

Abstract

Embodiments of the present disclosure relate to fallback reference signal configuration. According to embodiments of the present disclosure, a first device determines an original resource and a fallback resource for transmitting a reference signal. If the reference signal cannot be transmitted using the original resource, the reference signal can be retransmitted using the fallback resource. In this way, the positioning accuracy is improved and the positioning service latency is reduced. In addition, flexible transmission opportunities are provided for the reference signal.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to communication technologies, and more particularly, to methods, devices, and computer-readable media for fallback reference signal configuration. Background Art

[0002] With the development of communication technologies, positioning technologies have been proposed. Generally, reference signals can be used to perform positioning measurements. A network device can determine resources for transmitting reference signals. To improve positioning accuracy, further research is still needed. Summary of the Invention

[0003] Generally, embodiments of the present disclosure relate to a method for fallback reference signal configuration and a corresponding device.

[0004] In a first aspect, a method is provided. The method includes: determining a first configuration of a reference signal, the first configuration indicating a set of resources for transmitting the reference signal, the reference signal being used for positioning a third device. The method further includes determining a second configuration of the reference signal, the second configuration being associated with a set of fallback resources for transmitting the reference signal. The method further includes sending the first configuration and the second configuration to at least one of a second device, a third device, or a fourth device.

[0005] In a second aspect, a method is provided. The method includes receiving, at a second device and from a first device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a set of resources for transmitting the reference signal, and the second configuration being associated with a set of fallback resources for transmitting the reference signal, the reference signal being used for positioning a third device. The method further includes sending the first configuration and the second configuration to the third device and / or the fourth device.

[0006] In a third aspect, a method is provided. The method includes receiving, at a third device and from a first device and / or a second device, a first configuration of a reference signal and a second configuration of the reference signal, the reference signal being used for positioning the third device. The method further includes obtaining, from the first configuration, a set of resources for transmitting the reference signal. The method further includes determining, based on the first configuration and the second configuration, a set of fallback resources for transmitting the reference signal.

[0007] In a fourth aspect, a method is provided. The method includes receiving, at a fourth device and from a first device and / or a second device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a set of resources for transmitting the reference signal, and the second configuration being associated with a set of fallback resources for transmitting the reference signal, the reference signal being used for positioning a third device. The method further includes detecting, based on the first configuration and the second configuration, a reference signal sent by the third device and / or the first device.

[0008] In a fifth aspect, a first device is provided. The first device includes at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the first device to determine a first configuration of a reference signal, the first configuration indicating a set of resources for the transmission of the reference signal, the reference signal being used to locate a third device. The first device is further caused to determine a second configuration of the reference signal, the second configuration being associated with a set of fallback resources for the transmission of the reference signal. The first device is further caused to send the first configuration and the second configuration to at least one of a second device, a third device, or a fourth device.

[0009] In a sixth aspect, a second device is provided. The second device includes at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the second device to receive, at the second device and from the first device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a set of resources for the transmission of the reference signal, and the second configuration being associated with a set of fallback resources for the transmission of the reference signal, the reference signal being used to locate a third device. The second device is further caused to send the first configuration and the second configuration to the third device and / or the fourth device.

[0010] In a seventh aspect, a third device is provided. The third device includes at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the third device to receive, at the third device and from the first device and / or the second device, a first configuration of a reference signal and a second configuration of the reference signal, the reference signal being used to locate the third device. The third device is further caused to obtain, from the first configuration, the set of resources for the transmission of the reference signal. The third device is further caused to determine, based on the first configuration and the second configuration, the set of fallback resources for the transmission of the reference signal.

[0011] In an eighth aspect, a fourth device is provided. The fourth device includes at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code are configured to, together with the at least one processor, cause the fourth device to receive, at the fourth device and from the first device and / or the second device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a set of resources for the transmission of the reference signal, and the second configuration being associated with a set of fallback resources for the transmission of the reference signal, the reference signal being used to locate a third device. The fourth device is further caused to detect, based on the first configuration and the second configuration, a reference signal sent by the third device and / or the first device.

[0012] In a ninth aspect, an apparatus is provided. The apparatus includes components for determining a first configuration of a reference signal, the first configuration indicating a resource set for the transmission of the reference signal, the reference signal being used for positioning a third device; components for determining a second configuration of the reference signal, the second configuration being associated with a fallback resource set for the transmission of the reference signal; and components for sending the first configuration and the second configuration to at least one of a second device, a third device, or a fourth device.

[0013] In a tenth aspect, an apparatus is provided. The apparatus includes components for receiving, at a second device and from a first device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a resource set for the transmission of the reference signal, and the second configuration being associated with a fallback resource set for the transmission of the reference signal, the reference signal being used for positioning a third device; and components for sending the first configuration and the second configuration to the third device and / or the fourth device.

[0014] In an eleventh aspect, an apparatus is provided. The apparatus includes components for receiving, at a third device and from a first device and / or a second device, a first configuration of a reference signal and a second configuration of the reference signal, the reference signal being used for positioning the third device; components for obtaining, from the first configuration, a resource set for the transmission of the reference signal; and components for determining, based on the first configuration and the second configuration, a fallback resource set for the transmission of the reference signal.

[0015] In a twelfth aspect, an apparatus is provided. The apparatus includes components for receiving, at a fourth device and from a first device and / or a second device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a resource set for the transmission of the reference signal, and the second configuration being associated with a fallback resource set for the transmission of the reference signal, the reference signal being used for positioning a third device; and components for detecting, based on the first configuration and the second configuration, a reference signal sent by the third device and / or the first device.

[0016] In a thirteenth aspect, a computer-readable medium is provided, including program instructions for causing an apparatus to perform at least the method according to the fifth, sixth, seventh, or eighth aspect above.

[0017] It should be understood that the Summary of the Invention section is not intended to identify the key or essential features of the embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Through the following description, other features of the present disclosure will become readily understandable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Some example embodiments will now be described with reference to the accompanying drawings, in which:

[0019] Figure 1Shows a schematic diagram of a communication system according to an embodiment of the present disclosure;

[0020] Figure 2 Shows a signaling diagram of the interaction between devices according to an embodiment of the present disclosure;

[0021] Figure 3 Shows a signaling diagram of the interaction between devices according to an embodiment of the present disclosure;

[0022] Figures 4A to 4C Shows a schematic diagram of the mapping between resources according to an embodiment of the present disclosure;

[0023] Figure 5 Shows a flowchart of a method according to an embodiment of the present disclosure;

[0024] Figure 6 Shows a flowchart of a method according to an embodiment of the present disclosure;

[0025] Figure 7 Shows a flowchart of a method according to an embodiment of the present disclosure;

[0026] Figure 8 Shows a flowchart of a method according to an embodiment of the present disclosure;

[0027] Figure 9 Shows a simplified block diagram of a device suitable for implementing an embodiment of the present disclosure; and

[0028] Figure 10 Shows a block diagram of an example computer-readable medium according to some example embodiments of the present disclosure.

[0029] In all the figures, the same or similar reference numerals denote the same or similar elements. Detailed Description

[0030] The principles of the present disclosure will now be described with reference to some example embodiments. It should be understood that the description of these embodiments is only for the purpose of illustration and to assist those skilled in the art in understanding and implementing the present disclosure, and does not imply any limitation on the scope of the present invention. The disclosure described herein can be implemented in various ways other than those described below.

[0031] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure pertains.

[0032] References to "one embodiment", "an embodiment", "example embodiment", etc. in this disclosure mean that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Moreover, these phrases do not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is considered within the knowledge of those skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments, whether or not explicitly described.

[0033] It should be understood that although the terms "first" and "second" etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the example embodiments. As used herein, the term "and / or" includes any and all combinations of one or more of the listed terms.

[0034] The terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the example embodiments. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprise", "comprising", "have", "having", "include", and / or "including", when used herein, specify the presence of the stated features, elements, and / or components, etc., but do not preclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0035] As used in this application, the term "circuitry" may refer to one or more or all of the following:

[0036] (a) A pure hardware circuit implementation (such as an implementation only in analog and / or digital circuitry) and

[0037] (b) A combination of hardware circuitry and software, such as (where applicable):

[0038] (i) A combination of (one or more) analog and / or digital hardware circuitry and software / firmware, and

[0039] (ii) Any portion of (one or more) hardware processors (including (one or more) digital signal processors) with software, software, and (one or more) memories, which work together to enable a device (such as a mobile phone or a server) to perform various functions, and

[0040] (c) One or more hardware circuits and / or one or more processors, such as one or more microprocessors or portions of one or more microprocessors, require software (e.g., firmware) to operate, but the software may be absent when the operation does not require it.

[0041] This definition of circuitry applies to all uses of the term in this application, including in any claims. As a further example, as used in this application, the term circuitry also encompasses implementations that are only hardware circuits or processors (or multiple processors) or portions of hardware circuits or processors and their (or their) accompanying software and / or firmware. For example, if applicable to a particular claim element, the term circuitry also encompasses a baseband integrated circuit or a processor integrated circuit for a mobile device, or a similar integrated circuit in a server, a cellular network device, or other computing or network device.

[0042] As used herein, the term "communication network" refers to a network that follows any suitable communication standard, such as Long Term Evolution (LTE), LTE Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA), High Speed Packet Access (HSPA), NarrowBand Internet of Things (NB-IoT), New Radio (NR), etc. In addition, the communication between a terminal device and a network device in a communication network can be performed according to any suitable generation of communication protocols, including but not limited to first generation (1G), second generation (2G), 2.5G, 2.65G, third generation (3G), fourth generation (4G), 4.5G, future fifth generation (5G) communication protocols, and / or any other protocols known currently or developed in the future. Embodiments of the present disclosure can be applied in various communication systems. Given the rapid development of communication, there will of course also be future types of communication technologies and systems in which the present disclosure can be embodied. It should not be construed as limiting the scope of the present disclosure to the above systems.

[0043] As used herein, the term "network device" refers to a node in a communication network through which a terminal device accesses the network and receives services therefrom. Depending on the terminology and technology of the application, the network device can refer to a base station (BS) or an access point (AP), such as Node B (NodeB or NB), evolved Node B (eNodeB or eNB), NR NB (also known as gNB), remote radio unit (RRU), radio head (RH), remote radio head (RRH), relay, low power node (such as femto, pico), and so on.

[0044] The term "terminal device" refers to any terminal device capable of wireless communication. By way of example and not limitation, a terminal device may also be referred to as a communication device, user equipment (UE), subscriber station (SS), portable subscriber station, mobile station (MS), or access terminal (AT). Terminal devices may include, but are not limited to, mobile phones, cellular phones, smart phones, IP voice (VoIP) phones, wireless local loop phones, tablet computers, wearable terminal devices, personal digital assistants (PDAs), portable computers, desktop computers, image capture terminal devices (such as digital cameras), game terminal devices, music storage and playback devices, in-vehicle wireless terminal devices, wireless endpoints, mobile stations, laptop embedded devices (LEE), laptop mounted devices (LME), USB dongles, smart devices, wireless client devices (CPE), Internet of Things (IoT) devices, watches or other wearable devices, head-mounted displays (HMD), vehicles, drones, medical devices and applications (e.g., remote surgery), industrial devices and applications (e.g., robots and / or other wireless devices operating in an industrial and / or automated processing chain environment), consumer electronic devices, devices operating on commercial and / or industrial wireless networks, etc. In the following description, the terms "terminal device", "communication device", "terminal", "user equipment", and "UE" may be used interchangeably.

[0045] As mentioned above, in order to improve positioning accuracy, further research is still needed. A research project has been conducted in the 3rd Generation Partnership Project (3GPP) for positioning support in New Radio (NR). As an output of the research project phase, it is recommended to specify the following positioning solutions for NR Rel-16: Downlink Time Difference of Arrival (DL-TDOA); Uplink Time Difference of Arrival (UL-TDOA); Downlink Angle of Departure (DL-AoD); Uplink Angle of Arrival (UL-AoA); Multi-Cell Round Trip Time (Multi-RTT).

[0046] Subsequent work items have been proposed to specify positioning support. The goal is to specify solutions to enable RAT-related (for FR1 and FR2) and RAT-independent NR positioning technologies, as shown in Table 1.

[0047] Table 1

[0048]

[0049] Currently, general enhancements to the Rel-16 NR positioning features are being discussed in the RAN to determine the scope of Rel-17 NR positioning, including (but not limited to): high-precision positioning (centimeter level) and low-latency positioning.

[0050] For new use cases (e.g., V2X, IIoT, etc.), Rel-17 positioning should provide more stringent performance: for V2X use cases, we support a relative lateral accuracy of 0.1 m and a longitudinal accuracy of 0.5 m as defined as requirements in TS 22.186; for IIoT use cases, especially for factory / campus scenarios, we support an accuracy of 0.2 m as defined as requirements in TR 22.804. In addition, many companies mentioned the hope for a latency of <100 ms.

[0051] However, there are some potential positioning RS discard problems.

[0052] Case 1: Conflict with other higher-priority channels

[0053] Generally, positioning has a lower priority relative to data (although there are some exceptions that can be considered in very strict positioning requirements). When the semi-periodic or periodic PRS conflicts with other higher-priority channels, the PRS transmission may be discarded.

[0054] Taking the UL positioning RS (i.e., SRS) as an example, the priority rules between PUCCH, PUSCH, and SRS are shown in Table 2 below.

[0055] Table 2

[0056]

[0057] It is observed that in most cases, SRS has a lower transmission priority than PUCCH and PUSCH.

[0058] Case 2: When LBT fails in the unlicensed band

[0059] In the unlicensed band, the listen-before-talk (LBT) operation may be mandatory, where the device should check the channel availability before sending data. If the PRS transmitter checks the channel busy (i.e., LBT fails), the PRS should not be sent.

[0060] The event of PRS discard may be unknown on the receiver side. In UL-TDoA positioning, due to the overlap with PUCCH, SRS is not sent. The adjacent cell (expecting PRS reception) does not know the event of SRS discard. When performing ToA measurement, the adjacent cell cannot obtain the correct arrival time based on PUCCH. Then, incorrect positioning measurements will be reported to the Location Measurement Function (LMF).

[0061] Even if the receiver knows the event of PRS discard, the positioning measurement report will be lost. This will also affect the positioning estimation in the LMF. Therefore, in order to meet the positioning requirements of high accuracy and low latency and provide seamless positioning services, a new mechanism is needed to overcome the PRS discard problem.

[0062] According to an embodiment of the present disclosure, a first device determines an original resource and a fallback resource for transmitting a reference signal. If the reference signal cannot be transmitted using the original resource, the reference signal can be retransmitted using the fallback resource. This can improve positioning accuracy and reduce positioning service latency. In addition, flexible transmission opportunities are provided for the reference signal.

[0063] Figure 1 A schematic diagram of a communication system 100 in which embodiments of the present disclosure can be implemented is shown. The communication system 100, which is part of a communication network, includes a first device 110. The communication system 100 also includes a second device 120. The communication 100 also includes third devices 130-1, 130-2,......, 130-N, where N is an integer (collectively referred to as "(multiple) third devices 130"). The communication 100 also includes a fourth device 140. It should be understood that Figure 1 the number of different devices shown is given for illustrative purposes and does not imply any limitation.

[0064] The first device 110 and the fourth device 140 can be network devices. By way of example only, the first device 110 is a serving network device, and the fourth device 140 is an adjacent network device. The second device 120 can be a location server for managing the location of a device. For example, the second device 120 can be a Location Management Function (LMF). In some embodiments, the second device 120 can be a core network device. Alternatively, the second device 120 can also be at a network device. The third device 130 can be a terminal device. It should be noted that the first device 110 and the fourth device 140 can be interchanged. The first device 110 and the third device 130 can also be interchanged.

[0065] Communication in the communication system 100 can be implemented according to any suitable (multiple) communication protocols, including but not limited to cellular communication protocols of the first generation (1G), second generation (2G), third generation (3G), fourth generation (4G), and fifth generation (5G), wireless local area network communication protocols (such as Institute of Electrical and Electronics Engineers (IEEE) 802.11, etc.), and / or any other protocol known currently or developed in the future. In addition, the communication can utilize any suitable wireless communication technology, including but not limited to: Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Frequency Division Duplexing (FDD), Time Division Duplexing (TDD), Multiple Input Multiple Output (MIMO), Orthogonal Frequency Division Multiple Access (OFDMA), and / or any other technology known currently or developed in the future.

[0066] Figure 2A signaling diagram showing an interaction 200 between devices according to an embodiment of the present disclosure. The interaction 200 can be implemented between any suitable devices. For illustrative purposes only, the interaction 200 is described with reference to a first device 110, a second device 120, and a third device 130-1. It should be noted that the third device 130-1 is only an example and not a limitation.

[0067] The first device 110 determines 2010 a first configuration of a reference signal. In some embodiments, the reference signal can be an uplink reference signal. Alternatively or additionally, the reference signal can be a downlink reference signal. For example, the reference signal can be a positioning reference signal (PRS). Alternatively, the reference signal can be a sounding reference signal (SRS). It should be understood that embodiments of the present disclosure cover cases of positioning using all possible reference signals (such as CSI-RS in DL and PRACH in UL). For illustrative purposes only, the details of the interaction 200 are described with reference to PRS.

[0068] The first configuration indicates a resource set for the transmission of PRS. In some embodiments, the first device 110 can determine one or more timings for PRS. For example, the first configuration can indicate a resource set allocated for a PRS timing.

[0069] The first device 110 determines 2015 a second configuration of PRS. The second configuration is associated with a fallback resource set for sending PRS. In some embodiments, the first device 110 can determine one or more timings for PRS. For example, the second configuration can indicate a fallback resource set allocated for a floated PRS timing. One PRS may occupy frequency and / or time resources. Thus, if the original timing is not available, the PRS can be sent in a new location.

[0070] In some embodiments, the first device 110 can determine at least one offset in the time domain and / or frequency domain relative to the resource set. The first device 110 can generate a second configuration indicating the offset. Alternatively or additionally, the first device 110 can directly determine the fallback resource set, and the second configuration can explicitly indicate the fallback resource set.

[0071] The resource set can be associated with at least one fallback resource set. Figures 4A to 4C Shows the association between the resource set and the fallback resource set. It should be noted that Figures 4A to 4C the number of timings shown in

[0072] As Figure 4AAs shown, PRS timing 410-1 corresponds to floating PRS timing 420-1, and PRS timing 410-2 corresponds to floating PRS timing 420-2. In other words, a set of resources for PRS corresponds to a set of fallback resources for PRS. In this case, if an RPS discard occurs at PRS timing 410-1, the RPS can be retransmitted at floating RPS timing 420-1. If an RPS discard occurs at PRS timing 410-2, the RPS can be retransmitted at floating RPS timing 420-2. In this case, the first device 110 can determine an offset in the time domain and / or the frequency domain.

[0073] As Figure 4B shown, PRS timing 430-1 corresponds to floating PRS timings 440-1 and 440-2, and PRS timing 430-2 corresponds to floating PRS timings 440-3 and 440-4. In other words, a set of resources for PRS corresponds to more than one set of fallback resources for PRS. In this case, if an RPS discard occurs at PRS timing 430-1, the RPS can be retransmitted at floating RPS timing 440-1 or 440-2. If an RPS discard occurs at PRS timing 430-2, the RPS can be retransmitted at floating RPS timing 440-3 or 440-4. In this case, the first device 110 can determine more than one offset in the time domain and / or the frequency domain. The number of offsets can correspond to the number of floating PRS timings corresponding to one PRS timing.

[0074] As Figure 4C shown, PRS timings 450-1 and 450-2 correspond to floating PRS timing 460-1, and PRS timings 450-3 and 450-4 correspond to floating PRS timing 460-2. In other words, more than one set of resources for PRS corresponds to a set of fallback resources for PRS. In this case, if an RPS discard occurs at PRS timing 450-1 or 450-2, the RPS can be retransmitted at floating RPS timing 460-1. If an RPS discard occurs at PRS timing 450-3 or 450-4, the RPS can be retransmitted at floating RPS timing 460-2. In this case, the first device 110 can determine more than one offset in the time domain and / or the frequency domain. The number of offsets can correspond to the number of PRS timings corresponding to one floating PRS timing.

[0075] Returning to Figure 2 , the first device 110 sends the first configuration and the second configuration to the second device 120. For example, the first configuration and the second configuration can be sent to the second device 120 via the New Radio Positioning Protocol A (NRPPa) protocol.

[0076] The second device 120 sends 2025 the first configuration and the second configuration to the third device 130-1. For example, the first configuration and the second configuration may be sent to the third device 130-1 via the Long-Term Evolution Positioning Protocol (LPP) protocol.

[0077] The first device 110 may determine 2030 whether the resource set is available. For example, the first device 110 may determine whether the PRS conflicts with other higher-priority channels. Generally, the PRS has a lower priority than data. If the PRS conflicts with other higher-priority channels, then the resource set is not available, which means that the PRS transmission may be discarded. Alternatively or additionally, the first device 110 may check the channel availability. If the channel is busy, then the resource set is not available, which means that the PRS transmission may be discarded. In some embodiments, if the resource set for uplink transmission is reallocated for downlink transmission, then the resource set is not available, which means that the PRS transmission may be discarded. In other embodiments, if the resource set for downlink transmission is reallocated for uplink transmission, then the resource set is not available, which means that the PRS transmission may be discarded.

[0078] If the resource set is available, the first device 110 may send 2035 the PRS to the third device 130-1. The third device 130-1 detects 2040 the PRS based on the first configuration. For example, the third device 130-1 may obtain the resource set for the PRS and detect whether the resource set is used to send the PRS. If the third device 130-1 has detected the PRS based on the first configuration, then the third device 130-1 may perform positioning measurements on the detected PRS. If the PRS cannot be detected based on the first configuration, then the third device 130-1 may detect the PRS based on the second configuration.

[0079] If PRS discard occurs, the first device 110 uses the fallback resource set to send the PRS. For example, the first device 110 may determine 2045 whether the fallback resource set is available. The first device 110 sends 2050 the PRS to the third device 130-1 using the fallback resource set. The third device 130-1 detects 2055 the PRS based on the first configuration and the second configuration. The third device 130-1 determines the fallback resource set based on the first configuration and the second configuration. In some embodiments, the third device 130-1 may obtain the fallback resource set from the second configuration. In other embodiments, the third device 130-1 may obtain at least one offset from the second configuration and determine the fallback resource set based on the resource set and the at least one offset value. The third device 130-1 may perform measurements on the received PRS. In this way, the positioning accuracy is improved, and the positioning service latency is also reduced. In addition, flexible transmission opportunities can be provided.

[0080] Figure 3 A signaling diagram showing the interaction 300 between devices according to an embodiment of the present disclosure. The interaction 300 can be implemented between any suitable devices. For illustrative purposes, the interaction 300 is described with reference to a first device 110, a second device 120, a third device 130-1, and a fourth device 140. It should be noted that the third device 130-1 is only an example and not a limitation.

[0081] The first device 110 determines 3010 a first configuration of a reference signal. In some embodiments, the reference signal can be an uplink reference signal. Alternatively or additionally, the reference signal can be a downlink reference signal. For example, the reference signal can be a PRS. Alternatively, the reference signal can be an SRS. For illustrative purposes only, the details of the interaction 300 are described with reference to the SRS.

[0082] The first configuration indicates a set of resources for transmitting the SRS. In some embodiments, the first device 110 can determine one or more timings for the SRS. For example, the first configuration can indicate a set of resources allocated for the SRS timing.

[0083] The first device 110 determines 3015 a second configuration of the SRS. The second configuration is associated with a fallback set of resources for transmitting the SRS. In some embodiments, the first device 110 can determine one or more timings for the SRS. For example, the second configuration can indicate a fallback set of resources allocated for a floating SRS timing. An SRS may occupy frequency and / or time resources. Thus, if the original timing is not available, the SRS can be transmitted in a new location.

[0084] In some embodiments, the first device 110 can determine at least one offset in the time domain and / or frequency domain with respect to the set of resources. The first device 110 can generate a second configuration indicating the offset. Alternatively or additionally, the first device 110 can directly determine the fallback set of resources, and the second configuration can explicitly indicate the fallback set of resources.

[0085] As described above, the set of resources can be associated with at least one fallback set of resources. The details of the association between the set of resources and the fallback set of resources have been described above Figures 4A to 4C Similarly, in some embodiments, one set of resources for the SRS corresponds to one fallback set of resources for the SRS. Alternatively, one set of resources for the SRS corresponds to more than one fallback set of resources for the SRS. In other embodiments, more than one set of resources for the SRS corresponds to one fallback set of resources for the SRS.

[0086] In an example embodiment, the first device 110 sends the first configuration and the second configuration 3020 to the second device 120. For example, the first configuration and the second configuration may be sent to the second device 120 via the NRPPa protocol.

[0087] In some embodiments, the second device 120 may send the first configuration and the second configuration 3025 to the third device 130-1. For example, the first configuration and the second configuration may be sent to the third device 130-1 via the LPP protocol.

[0088] In some embodiments, the first device 110 may send the first configuration and the second configuration 3030 to the third device 130-1. For example, the first configuration and the second configuration may be sent to the third device 130-1 via radio resource control (RRC) signaling. Alternatively or additionally, the first configuration and the second configuration may be sent to the third device 130-1 via physical layer (PHY) signaling.

[0089] In other embodiments, the second device 120 may send the first configuration and the second configuration 3035 to the fourth device 140. For example, the first configuration and the second configuration may be sent to the fourth device 140 via the NRPPa protocol.

[0090] In some embodiments, the first device 110 may send the first configuration and the second configuration 3040 to the fourth device 140. For example, the first configuration and the second configuration may be sent to the fourth device via the X2 interface.

[0091] The third device 130-1 obtains 3045 a resource set for SPS transmission from the first configuration. For example, the third device 130-1 may obtain an SPS occasion from the first configuration.

[0092] The third device 130-1 determines 3050 a fallback resource set for sending SPS from the second configuration. For example, the third device 130-1 may obtain an offset relative to the resource set from the second configuration and determine the fallback resource set based on the resource set and the offset value. Alternatively, the third device 130-1 may directly obtain the fallback resource set from the second configuration.

[0093] In some embodiments, the first device 110 may send 3055 a first scheduling request to the third device 130-1. For example, the first device 110 may configure a periodic SRS. Alternatively, the first device 110 may configure a semi-periodic SRS.

[0094] If the resource set is available, the third device 130-1 sends 3060 SRS to the fourth device 140 and / or the first device 110. The third device 130-1 may send the SRS after receiving the first scheduling request. Alternatively, the third device 130-1 may send the SRS without the first scheduling request. The fourth device 140 detects 3070 SRS based on the first configuration. If the SRS is detected, the fourth device 140 may perform measurements on the detected SRS.

[0095] If the resource set is not available, the third device 130-1 may use the fallback resource set to send 3080 SRS without receiving a second scheduling request. In some embodiments, the third device 130-1 may also determine whether the fallback resource set is available.

[0096] In some embodiments, the first device 110 determines whether 3060 SRS is sent. For example, the first device 110 may determine whether SRS discard occurs based on a predetermined rule (e.g., a channel priority rule). If the first device 110 determines that SRS discard occurs, the first device 110 sends a 3075 second scheduling request to the third device 130-1. For example, the first device 110 may schedule an aperiodic SRS transmission. The third device 130-1 may use the fallback resource set to send 3080 SRS to the fourth device 140 after receiving the second scheduling request.

[0097] The fourth device 140 detects 3085 SRS based on the second configuration. The fourth device 140 may perform positioning measurements on the detected SRS. In this way, the positioning accuracy is improved, and the positioning service latency is also reduced. In addition, flexible transmission opportunities can be provided.

[0098] Figure 5 A flowchart of a method 500 according to an embodiment of the present disclosure is shown. The method 500 may be implemented at any suitable device. For example, the method may be implemented at the first device 110. In other embodiments, the method may be implemented at the fourth device 140.

[0099] In block 510, the first device 110 determines a first configuration of a reference signal. In some embodiments, the reference signal may be an uplink reference signal. Alternatively or additionally, the reference signal may be a downlink reference signal. For example, the reference signal may be a PRS. Alternatively, the reference signal may be an SRS. For illustrative purposes only, the details of the interaction 200 are described with reference to the PRS.

[0100] The first configuration indicates a resource set for the transmission of PRS. In some embodiments, the first device 110 may determine one or more timings for the PRS. For example, the first configuration may indicate a resource set allocated for a PRS timing.

[0101] In block 520, the first device 110 determines a second configuration for the PRS. The second configuration is associated with a fallback resource set for the transmission of the PRS. In some embodiments, the first device 110 may determine one or more timings for the PRS. For example, the second configuration may indicate a fallback resource set allocated for a floating PRS timing. A PRS may occupy frequency and / or time resources. Thus, if the original timing is not available, the PRS can be sent at a new location.

[0102] In some embodiments, the first device 110 may determine at least one offset in the time domain and / or frequency domain with respect to the resource set. The first device 110 may generate a second configuration indicating the offset. Alternatively or additionally, the first device 110 may directly determine the fallback resource set, and the second configuration may explicitly indicate the fallback resource set.

[0103] In block 530, the first device 110 transmits the first configuration and the second configuration. In an exemplary embodiment, the first device 110 may transmit the first configuration and the second configuration to the second device 120. For example, the first configuration and the second configuration may be transmitted to the second device 120 via the NRPPa protocol.

[0104] In some embodiments, the first device 110 may transmit the first configuration and the second configuration to the third device 130-1. For example, the first configuration and the second configuration may be transmitted to the third device 130-1 via RRC signaling. Alternatively or additionally, the first configuration and the second configuration may be transmitted to the third device 130-1 via PHY signaling.

[0105] In some embodiments, the first device 110 may transmit the first configuration and the second configuration to the fourth device 140. For example, the first configuration and the second configuration may be transmitted to the fourth device via the X2 interface.

[0106] In some embodiments, the first device 110 may determine whether the resource set is available. For example, the first device 110 may determine whether the PRS conflicts with other higher-priority channels. Generally, the PRS has a lower priority relative to data. If the PRS conflicts with other higher-priority channels, the PRS transmission may be discarded. Alternatively or additionally, the first device 110 may check the channel availability. If the channel is busy, the PRS transmission may be discarded.

[0107] If the resource set is available, the first device 110 may send a PRS to the third device 130-1. If PRS discard occurs, the first device 110 uses the fallback resource set to send the PRS. For example, the first device 110 may determine whether the fallback resource set is available. The first device 110 uses the fallback resource set to send a PRS to the third device 130-1.

[0108] In some embodiments, the first device 110 may send a 3055 first scheduling request to the third device 130-1. For example, the first device 110 may configure a periodic SRS. Alternatively, the first device 110 may configure a semi-periodic SRS.

[0109] In some embodiments, the first device 110 determines 3060 whether an SRS is sent. For example, the first device 110 may determine whether SRS discard occurs based on a predetermined rule (e.g., a channel priority rule). If the first device 110 determines that SRS discard occurs, the first device 110 sends a 3075 second scheduling request to the third device 130-1. For example, the first device 110 may schedule an aperiodic SRS transmission.

[0110] Figure 6 A flowchart of a method 600 according to an embodiment of the present disclosure is shown. The method 600 may be implemented at any suitable device. For example, the method may be implemented at the second device 120.

[0111] At block 610, the second device 120 receives a first configuration and a second configuration from the first device 110. For example, the first configuration and the second configuration may be sent to the second device 120 via the NRPPa protocol.

[0112] In some embodiments, the reference signal may be an uplink reference signal. Alternatively or additionally, the reference signal may be a downlink reference signal. For example, the reference signal may be a PRS. Alternatively, the reference signal may be an SRS.

[0113] The first configuration indicates a resource set for the transmission of the PRS. For example, the first configuration may indicate the resource set allocated for the PRS occasion. The second configuration indicates a fallback resource set for the transmission of the PRS. In some embodiments, the second configuration may indicate the fallback resource set allocated for the floating PRS occasion. One PRS may occupy frequency and / or time resources. Thus, if the original occasion is not available, the PRS may be sent at a new location.

[0114] In some embodiments, a resource set for SRS corresponds to a fallback resource set for SRS. Alternatively, a resource set for SRS corresponds to more than one fallback resource set for SRS. In other embodiments, more than one resource set for SRS corresponds to a fallback resource set for SRS.

[0115] At block 620, the second device 120 sends the first configuration and the second configuration to the third device 130-1 and / or the fourth device. For example, the first configuration and the second configuration may be sent to the third device 130-1 via the LPP protocol. Alternatively, the first configuration and the second configuration may be sent to the fourth device 140 via the NRPPa protocol.

[0116] Figure 7 A flowchart of a method 700 according to an embodiment of the present disclosure is shown. The method 700 may be implemented at any suitable device. For example, the method may be implemented at the third device 130-1.

[0117] At block 710, the third device 130-1 receives the first configuration and the second configuration from the first device 110 and / or the second device 120. For example, the first configuration and the second configuration may be sent to the third device 130-1 via the LPP protocol. Alternatively, the first configuration and the second configuration may be sent to the third device 130-1 via RRC signaling and / or PHY signaling.

[0118] In some embodiments, the reference signal may be an uplink reference signal. Alternatively or additionally, the reference signal may be a downlink reference signal. For example, the reference signal may be a PRS. Alternatively, the reference signal may be an SRS.

[0119] The first configuration indicates a resource set for the transmission of PRS. For example, the first configuration may indicate a resource set allocated for a PRS occasion. The second configuration indicates a fallback resource set for the transmission of PRS. In some embodiments, the second configuration may indicate a fallback resource set allocated for a floating PRS occasion. A PRS may occupy frequency and / or time resources. Thus, if the original occasion is unavailable, the PRS may be sent in a new location.

[0120] In some embodiments, a resource set for SRS corresponds to a fallback resource set for SRS. Alternatively, a resource set for SRS corresponds to more than one fallback resource set for SRS. In other embodiments, more than one resource set for SRS corresponds to a fallback resource set for SRS.

[0121] At block 720, the third device 130-1 obtains a set of resources for SPS transmission based on the first configuration and the second configuration. For example, the third device 130-1 may obtain the SPS occasion from the first configuration.

[0122] At block 730, the third device 130-1 determines a set of fallback resources for sending the SPS based on the second configuration. For example, the third device 130-1 may obtain an offset value from the second configuration for the set of resources, and determine the set of fallback resources based on the set of resources and the offset value. Alternatively, the third device 130-1 may directly obtain the set of fallback resources. The third device 130-1 determines the set of fallback resources based on the second configuration. In some embodiments, the third device 130-1 may obtain the set of fallback resources from the second configuration. In other embodiments, the third device 130-1 may obtain at least one offset from the second configuration, and determine the set of fallback resources based on the set of resources and the at least one offset value.

[0123] In some embodiments, the third device 130-1 may detect the PRS based on the first configuration. If the third device 130-1 has detected the PRS based on the first configuration, the third device 130-1 may perform positioning measurements on the detected PRS. If the PRS cannot be detected based on the first configuration, the third device 130-1 may detect the PRS based on the second configuration.

[0124] If the set of resources is available, the third device 130-1 may send the SRS to the fourth device 140 and / or the first device 110. If the set of resources is not available, the third device 130-1 may use the set of fallback resources to send the SRS. In some embodiments, the third device 130-1 may also determine whether the set of fallback resources is available. In some embodiments, the third device 130-1 may receive a first scheduling request from the first device 110. For example, the first device 110 may configure a periodic SRS. Alternatively, the first device 110 may configure a semi-periodic SRS. In other embodiments, the third device 130-1 may send the SRS to the fourth device 140 and / or the first device 110 without receiving the first scheduling request.

[0125] The third device 130-1 may receive a second scheduling request from the first device 110. For example, the first device 110 may schedule an aperiodic SRS transmission. The third device 130-1 may use the set of fallback resources to send the SRS to the fourth device 140 after receiving the second scheduling request. In other embodiments, the third device 130-1 may use the set of fallback resources to send the SRS to the fourth device 140 without receiving the second scheduling request.

[0126] Figure 8FIG. 800 shows a flowchart of a method 800 according to an embodiment of the present disclosure. The method 800 may be implemented at any suitable device. For example, the method may be implemented at the fourth device 140. In other embodiments, the method may be implemented at the first device 110.

[0127] At block 810, the fourth device 140 receives a first configuration and a second configuration from the first device 110 and / or the second device 120. For example, the first configuration and the second configuration may be sent to the fourth device 130-1 via the NRPPa protocol. Alternatively, the first configuration and the second configuration may be sent to the third device 130-1 via the X2 interface.

[0128] In some embodiments, the reference signal may be an uplink reference signal. Alternatively or additionally, the reference signal may be a downlink reference signal. For example, the reference signal may be a PRS. Alternatively, the reference signal may be an SRS.

[0129] The first configuration indicates a resource set for transmitting the PRS. For example, the first configuration may indicate a resource set allocated for a PRS occasion. The second configuration indicates a fallback resource set for transmitting the PRS. In some embodiments, the second configuration may be associated with a fallback resource set allocated for a floating PRS occasion. One PRS may occupy frequency and / or time resources. Thus, if the original occasion is unavailable, the PRS may be transmitted at a new location.

[0130] In some embodiments, one resource set for the SRS corresponds to one fallback resource set for the SRS. Alternatively, one resource set for the SRS corresponds to more than one fallback resource set for the SRS. In other embodiments, more than one resource set for the SRS corresponds to one fallback resource set for the SRS.

[0131] At block 820, the fourth device 140 detects a reference signal based on the first configuration and the second configuration. The reference signal may be sent by the third device 130. Alternatively or additionally, the reference signal may be sent by the first device 110. If the SRS is detected, the fourth device 140 may perform measurements on the detected SRS.

[0132] The third device 130-1 may send the SRS to the fourth device 140 using a fallback resource set after receiving the second scheduling request. The fourth device 140 may detect the SRS based on the second configuration. The fourth device 140 may determine the fallback resource set based on the second configuration. In some embodiments, the fourth device 140 may obtain the fallback resource set from the second configuration. In other embodiments, the fourth device 140 may obtain at least one offset from the second configuration and determine the fallback resource set based on the resource set and the at least one offset value. In this way, the positioning accuracy is improved and the positioning service latency is also reduced. In addition, flexible transmission opportunities can be provided.

[0133] In some embodiments, the apparatus (e.g., the first device 110) for performing the method 500 may include corresponding components for performing the corresponding steps in the method 500. These components may be implemented in any suitable manner. For example, it may be implemented by circuitry or software modules.

[0134] In some embodiments, the apparatus includes components for determining a first configuration of a reference signal, the first configuration indicating a resource set for the transmission of the reference signal, the reference signal being used for positioning the third device; components for determining a second configuration of the reference signal, the second configuration being associated with a fallback resource set for the transmission of the reference signal; and components for sending the first configuration and the second configuration to at least one of the second device, the third device, or the fourth device.

[0135] In some embodiments, the components for determining the second configuration of the reference include: components for determining a fallback resource set for the transmission of the reference signal; and components for generating the second configuration that explicitly indicates the fallback resource set.

[0136] In some embodiments, the components for determining the second configuration of the reference signal include: components for determining at least one offset in the time domain and / or frequency domain relative to the resource set for the transmission of the reference signal; and components for generating the second configuration indicating the offset such that the fallback resource set is determined based on the at least one offset and the resource set.

[0137] In some embodiments, the reference signal is a downlink reference signal, and the apparatus further includes: components for sending the downlink reference signal to the third device using the fallback resource set according to the determination that the resource set is unavailable.

[0138] In some embodiments, the reference signal is an uplink reference signal, and the apparatus further comprises: components for monitoring the transmission of the uplink reference signal; and components for sending a second scheduling request to a third device according to a determination that the third device cannot use a resource set to send the uplink reference signal, the second scheduling request being for sending the uplink reference signal based on a second configuration.

[0139] In some embodiments, the apparatus further comprises components for sending a first scheduling request to a third device, the first scheduling request being for sending the uplink reference signal based on a first configuration.

[0140] In some embodiments, one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

[0141] In some embodiments, the first device comprises a network device, the second device comprises a location server, the third device comprises a terminal device, and the fourth device comprises another network device.

[0142] In some embodiments, the apparatus (e.g., the second device 120) for performing method 600 may comprise corresponding components for performing the corresponding steps in method 600. These components may be implemented in any suitable manner. For example, it may be implemented by circuitry or software modules.

[0143] In some embodiments, the apparatus comprises components for receiving, at the second device and from the first device, a first configuration of a reference signal and a second configuration of the reference signal, the first configuration indicating a resource set for the transmission of the reference signal, and the second configuration being associated with a fallback resource set for the transmission of the reference signal, the reference signal being used to locate a third device; and components for sending the first configuration and the second configuration to the third device and / or the fourth device.

[0144] In some embodiments, the second configuration explicitly indicates the fallback resource set.

[0145] In some embodiments, the second configuration indicates at least one offset in the time domain and / or the frequency domain relative to the resource set, such that the fallback resource set is determined based on the at least one offset and the resource set.

[0146] In some embodiments, one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

[0147] In some embodiments, the first device comprises a network device, the second device comprises a location server, the third device comprises a terminal device, and the fourth device comprises an adjacent network device.

[0148] In some embodiments, the apparatus (e.g., the third device 130) for performing method 700 may include corresponding components for performing the corresponding steps in method 700. These components may be implemented in any suitable manner. For example, it may be implemented by circuitry or software modules.

[0149] In some embodiments, the apparatus includes components for receiving a first configuration of a reference signal and a second configuration of the reference signal at the third device and from the first device and / or the second device, the reference signal being used to locate the third device; components for obtaining a set of resources for the transmission of the reference signal from the first configuration; and components for determining a fallback set of resources for the transmission of the reference signal based on the first configuration and the second configuration.

[0150] In some embodiments, the components for determining the fallback set of resources include: components for obtaining at least one offset in the time domain and / or the frequency domain with respect to the set of resources from the second configuration; and components for determining the fallback set of resources based on the set of resources and the at least one offset.

[0151] In some embodiments, the components for determining the fallback set of resources include: components for obtaining the fallback set of resources from the second configuration.

[0152] In some embodiments, the reference signal is a downlink reference signal, and the apparatus further includes: components for detecting the downlink reference signal based on the first configuration; components for detecting the downlink reference signal based on the second configuration according to a determination of a failure to detect the downlink reference signal.

[0153] In some embodiments, the apparatus further includes components for performing a positioning measurement based on the downlink reference signal according to a determination of a successful detection of the downlink reference signal based on the second configuration.

[0154] In some embodiments, the reference signal is an uplink reference signal, and the apparatus further includes: components for determining whether the set of resources is available; components for receiving a second scheduling request from the first device according to a determination that the set of resources is not available, the second scheduling request being for transmitting the uplink reference signal based on the second configuration; and components for transmitting the uplink reference signal to the fourth device and / or the first device using the fallback set of resources.

[0155] In some embodiments, the reference signal is an uplink reference signal, and the apparatus further includes: components for receiving a first scheduling request from the first device, the first scheduling request being for transmitting the uplink reference signal based on the first configuration.

[0156] In some embodiments, the reference signal is an uplink reference signal, and the apparatus further includes components for sending an uplink reference signal to a fourth device and / or a first device using a fallback resource set according to a determination that a resource set is unavailable.

[0157] In some embodiments, one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

[0158] In some embodiments, the first device includes a network device, the second device includes a location server, and the third device includes a terminal device.

[0159] In some embodiments, the apparatus for performing method 800 (e.g., the fourth device 140) may include corresponding components for performing the corresponding steps in method 800. These components may be implemented in any suitable manner. For example, it may be implemented by circuitry or software modules.

[0160] In some embodiments, the apparatus includes components for receiving a first configuration of a reference signal and a second configuration of the reference signal at the fourth device and from the first device and / or the second device, the first configuration indicating a resource set for the transmission of the reference signal, and the second configuration being associated with a fallback resource set for the transmission of the reference signal, the reference signal being used to locate the third device; and components for detecting the reference signal sent by the third device and / or the first device based on the first configuration and the second configuration.

[0161] In some embodiments, the second configuration explicitly indicates the fallback resource set.

[0162] In some embodiments, the apparatus further includes components for obtaining at least one offset in the time domain and / or the frequency domain with respect to the resource set from the second configuration; and components for determining the fallback resource set based on the at least one offset and the resource set.

[0163] In some embodiments, the components for detecting the reference signal include: components for detecting the reference signal on the resource set; and components for detecting the reference signal on the fallback resource set according to a determination of a failure to detect the reference signal.

[0164] In some embodiments, the apparatus further includes components for performing a positioning measurement based on the reference signal according to a determination of a successful detection of the reference signal based on the second configuration.

[0165] In some embodiments, one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

[0166] In some embodiments, the first device includes a network device, the second device includes a location server, the third device includes a terminal device, and the fourth device includes another network device.

[0167] Figure 9 is a simplified block diagram of a device 900 suitable for implementing embodiments of the present disclosure. The device 900 may be provided to implement a communication device, such as Figure 1 the first device 110, the second device 120, the third device 130, and the fourth device 140 shown. As shown, the device 900 includes one or more processors 910, one or more memories 920 coupled to the processors 910, and one or more communication modules 940 coupled to the processors 910.

[0168] The communication module 940 is used for two-way communication. The communication module 940 has at least one antenna to facilitate communication. The communication interface may represent any interface necessary for communicating with other network elements.

[0169] The processor 910 may be of any type suitable for the local technical network and may include, by way of non-limiting example, one or more of the following: a general-purpose computer, a special-purpose computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The device 900 may have multiple processors, such as an application-specific integrated circuit chip that is subordinate in time to a clock synchronized with the main processor.

[0170] The memory 920 may include one or more non-volatile memories and one or more volatile memories. Examples of non-volatile memories include, but are not limited to, read-only memory (ROM) 924, electrically programmable read-only memory (EPROM), flash memory, hard disk, optical disc (CD), digital video disc (DVD), and other magnetic storage and / or optical storage. Examples of volatile memories include, but are not limited to, random access memory (RAM) 922 and other volatile memories that do not persist during a power outage.

[0171] The computer program 930 includes computer-executable instructions executed by the associated processor 910. The program 930 may be stored in the ROM 924. The processor 910 may execute any suitable actions and processes by loading the program 930 into the RAM 922.

[0172] Embodiments of the present disclosure may be implemented by the program 920 such that the device 900 may execute any process of the present disclosure as discussed with reference to Figures 2 to 8 Embodiments of the present disclosure may also be implemented by hardware or by a combination of software and hardware.

[0173] In some example embodiments, program 930 may be tangibly embodied in a computer-readable medium, which may include within device 900 (such as in memory 920) or other storage devices accessible by device 900. Device 900 may load program 930 from the computer-readable medium into RAM 922 for execution. The computer-readable medium may include any type of tangible non-volatile memory, such as ROM, EPROM, flash memory, hard disk, CD, DVD, etc. Figure 10 An example of a computer-readable medium 1000 in the form of a CD or DVD is shown. Program 930 is stored on the computer-readable medium.

[0174] It should be understood that future networks may utilize network function virtualization (NFV), which is a network architecture concept that proposes virtualizing network node functions into "building blocks" or entities that can be operably connected or linked together to provide services. Virtualized network functions (VNFs) may include one or more virtual machines that run computer program code using standard or common types of servers instead of custom hardware. Cloud computing or data storage may also be utilized. In radio communications, this may mean that node operations are performed at least in part in a central / centralized unit CU (such as a server, host, or node), which is operably coupled to a distributed unit DU (such as a radio head / node). Node operations may also be distributed among multiple servers, nodes, or hosts. It should also be understood that the labor distribution between core network operations and base station operations may vary depending on the implementation.

[0175] In one embodiment, a server may generate a virtual network through which the server communicates with the distributed unit. Generally speaking, a virtual network may involve the process of combining hardware and software network resources and network functions into a single, software-based management entity virtual network. Such a virtual network may provide a flexible operation distribution between the server and the radio head / node. In practice, any digital signal processing tasks may be performed in the CU or the DU, and the boundary of the responsibility transfer between the CU and the DU may be selected according to the implementation.

[0176] Thus, in one embodiment, a CU-DU architecture is implemented. In this case, device 1000 may be included in a central unit (e.g., a control unit, an edge cloud server, a server), which is operatively coupled (e.g., via a wireless or wired network) to a distributed unit (e.g., a remote radio head / node). That is, the central unit (e.g., an edge cloud server) and the distributed unit may be separate devices that communicate with each other via a wireless circuit path or via a wired connection. Alternatively, they may be in the same entity that communicates via a wired connection or the like. The edge cloud or edge cloud server may serve multiple distributed units or radio access networks. In one embodiment, at least some of the described processes may be performed by the central unit. In another embodiment, device 900 may alternatively be included in the distributed unit, and at least some of the described processes may be performed by the distributed unit.

[0177] In one embodiment, the execution of at least some functions of device 900 may be shared between two physically separate devices (DU and CU) that form an operating entity. Thus, the device may be viewed as depicting an operating entity that includes one or more physically separate devices for performing at least some of the described processes. In one embodiment, such a CU-DU architecture may provide a flexible distribution of operations between the CU and the DU. In practice, any digital signal processing task may be performed in the CU or the DU, and the boundary of the transfer of responsibilities between the CU and the DU may be selected according to the implementation. In one embodiment, device 1000 controls the execution of the process, regardless of the location of the device and regardless of where the process / function is performed.

[0178] Generally, the various embodiments of the present disclosure may be implemented in hardware or special-purpose circuits, software, logic, or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software executable by a controller, a microprocessor, or other computing device. Although the various aspects of the embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other graphical representation, it should be understood that the blocks, devices, systems, techniques, or methods described herein may be implemented, as non-limiting examples, in: hardware, software, firmware, special-purpose circuits or logic, general-purpose hardware or a controller or other computing device, or some combination thereof.

[0179] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, that are executed in a device on a target real or virtual processor to perform as described above with reference to Figures 5 to 8The described methods range from 500 to 800. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform specific tasks or implement specific abstract data types. In various embodiments, the functions of program modules can be combined or split among program modules as needed. Machine-executable instructions for program modules can be executed within local or distributed devices. In a distributed device, program modules can be located in both local and remote storage media.

[0180] The program code for performing the methods of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the program code is executed by the processor or controller, the functions / operations specified in the flowchart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0181] In the context of the present disclosure, the computer program code or related data can be carried by any suitable carrier to enable a device, apparatus, or processor to perform the various processes and operations described above. Examples of carriers include signals, computer-readable media, etc.

[0182] The computer-readable media can be a computer-readable signal medium or a computer-readable storage medium. The computer-readable media can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatuses, or any suitable combination of the foregoing. More specific examples of the computer-readable storage medium will include an electrical connection with one or more wires, a portable computer floppy disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0183] Furthermore, although the operations are described in a specific order, this should not be construed as requiring that the operations be performed in the specific order shown or in sequential order, or that all of the shown operations be performed to obtain the desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, the various features described in the context of a single embodiment can also be implemented separately or in any suitable sub-combination in multiple embodiments.

[0184] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts are disclosed as example forms of implementing the claims.

Claims

1. A method for communication, comprising: determining, at a first device, a first configuration of a downlink reference signal, the first configuration indicating a resource set for transmission of the downlink reference signal, the resource set including a transmission occasion for transmitting the downlink reference signal, wherein the downlink reference signal is used for positioning a third device, the first device includes a network device, and the third device includes a terminal device; determining a second configuration of the downlink reference signal, the second configuration being associated with a fallback resource set for retransmission of the downlink reference signal, wherein the fallback resource set includes a fallback transmission occasion for retransmission of the downlink reference signal, and the fallback transmission occasion for retransmission of the downlink reference signal is different from the transmission occasion for transmitting the downlink reference signal; sending the first configuration and the second configuration to at least one of a second device, a third device, or a fourth device, wherein the fourth device includes a network device adjacent to the first device; after sending the first configuration and the second configuration, determining whether a transmission occasion included in the resource set is available by determining whether the downlink reference signal is likely to be discarded for the transmission occasion included in the resource set; based on determining that the transmission occasion included in the resource set is available, at the transmission occasion included in the resource set for transmitting the downlink reference signal, the third device transmits the downlink reference signal; and based on determining that the transmission occasion included in the resource set is unavailable, at the fallback transmission occasion for retransmission of the downlink reference signal included in the fallback resource set, sending the downlink reference signal to the third device for retransmitting the downlink reference signal.

2. The method according to claim 1, wherein determining the second configuration of the downlink reference signal comprises: determining the fallback resource set for the transmission of the downlink reference signal; and generating the second configuration explicitly indicating the fallback resource set.

3. The method according to claim 1, wherein determining the second configuration of the downlink reference signal comprises: determining at least one offset in time domain and / or frequency domain relative to the resource set for the transmission of the downlink reference signal; and generating the second configuration indicating the offset such that the fallback resource set is determined based on the at least one offset and the resource set.

4. The method according to claim 1, wherein one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

5. A method for communication, comprising: Receiving, at a third device, a first configuration of a downlink reference signal and a second configuration of the downlink reference signal from a first device and / or a second device, wherein the downlink reference signal is used for positioning the third device, wherein the first device includes a network device, the second device includes a location server, and the third device includes a terminal device; Obtaining, from the first configuration, a resource set for transmission of the downlink reference signal, the resource set including a transmission occasion for transmitting the downlink reference signal; Determining, based on the second configuration and the first configuration, a fallback resource set for the transmission of the downlink reference signal, wherein the fallback resource set includes a fallback transmission occasion for retransmission of the downlink reference signal, and the fallback transmission occasion for retransmission of the downlink reference signal is different from the transmission occasion for transmitting the downlink reference signal; After receiving the first configuration and the second configuration, detecting the downlink reference signal based on the first configuration, and determining whether the transmission occasion included in the resource set is available by determining whether the downlink reference signal may be discarded for the transmission occasion included in the resource set; Detecting the downlink reference signal based on the second configuration at the fallback transmission occasion for retransmission of the downlink reference signal included in the fallback resource set according to a determination of a failure to detect the downlink reference signal at the transmission occasion for transmitting the downlink reference signal included in the resource set; And Performing a positioning measurement based on the downlink reference signal according to a determination of a success in detecting the downlink reference signal based on the second configuration.

6. The method according to claim 5, wherein determining the fallback resource set includes: Obtaining, from the second configuration, at least one offset in a time domain and / or a frequency domain relative to the resource set; And Determining the fallback resource set based on the resource set and the at least one offset.

7. The method according to claim 5, wherein determining the fallback resource set includes: Obtaining the fallback resource set from the second configuration.

8. The method according to claim 5, wherein one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

9. A method for communication, comprising: At a fourth device and receiving a first configuration of a downlink reference signal and a second configuration of the downlink reference signal from a first device and / or a second device, the first configuration indicating a resource set for transmission of the downlink reference signal, the resource set including a transmission occasion for transmitting the downlink reference signal, and the second configuration being associated with a fallback resource set for the transmission of the downlink reference signal, wherein the fallback resource set includes a fallback transmission occasion for retransmission of the downlink reference signal, and the fallback transmission occasion for retransmission of the downlink reference signal is different from the transmission occasion for transmitting the downlink reference signal, the downlink reference signal being used for positioning a third device, wherein the first device includes a network device, the second device includes a location server, the third device includes a terminal device, and the fourth device includes another network device; Based on the first configuration and the second configuration, detecting the downlink reference signal transmitted by the third device and / or the first device; Detecting the downlink reference signal at the transmission occasion included in the resource set; According to a determination of failure to detect the downlink reference signal, detecting the downlink reference signal at the fallback transmission occasion for retransmission of the downlink reference signal included in the fallback resource set; And According to a determination of success in detecting the downlink reference signal based on the second configuration, performing a positioning measurement based on the downlink reference signal.

10. The method according to claim 9, wherein the second configuration explicitly indicates the fallback resource set.

11. The method according to claim 9, further comprising: Obtaining at least one offset in the time domain and / or the frequency domain relative to the resource set from the second configuration; And Determining the fallback resource set based on the at least one offset and the resource set.

12. The method according to claim 9, wherein one resource set corresponds to one or more fallback resource sets, or more than one resource set corresponds to one fallback resource set.

13. A first device for communication, comprising: At least one processor; And At least one memory, including computer program code; The at least one memory and the computer program code are configured to, together with the at least one processor, cause the first device to perform any one of the methods according to claims 1 to 4.

14. A third device for communication, comprising: At least one processor; And At least one memory, including computer program code; The at least one memory and the computer program code are configured to, together with the at least one processor, cause the third device to perform any one of the methods according to claims 5 to 8.

15. A fourth device for communication, comprising: At least one processor; And At least one memory, including computer program code; The at least one memory and the computer program code are configured to, with the at least one processor, cause the fourth device to perform any of the methods according to claims 9 to 12.

16. A computer-readable storage medium comprising program instructions stored thereon, which instructions, when executed by a device, cause the device to perform the method according to any one of claims 1 to 4.

17. A computer-readable storage medium comprising program instructions stored thereon, which instructions, when executed by a device, cause the device to perform the method according to any one of claims 5 to 8.

18. A computer-readable storage medium comprising program instructions stored thereon, which instructions, when executed by a device, cause the device to perform the method according to any one of claims 9 to 12.

19. A device for communication comprising means for performing the method according to any one of claims 1 to 4.

20. A device for communication comprising means for performing the method according to any one of claims 5 to 8.

21. A device for communication comprising means for performing the method according to any one of claims 9 to 12.

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