Methods, devices and computer storage media of communication
By adjusting reference signal configurations based on measurement reports, the method addresses the challenge of enhancing positioning performance and coverage in cellular networks using intermediate nodes like RIS, improving identification and scheduling for better network deployment.
Patent Information
- Application Number
- PCT/CN2024/084900
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-10-02
AI Technical Summary
Existing cellular network deployments face challenges in providing coverage due to the limitations of regular full-stack cells, and there is a lack of effective solutions for improving positioning performance using reconfigurable intelligent surfaces (RIS) without proper scheduling and measurement strategies.
A method involving a network device that transmits reference signal configurations to a terminal device and intermediate nodes, receives measurement reports, and adjusts configurations based on path measurements to identify the association and location of intermediate nodes, such as RIS, to enhance positioning accuracy.
This approach allows for improved identification and scheduling of intermediate nodes, enhancing RIS-based positioning performance by determining whether an intermediate node is associated with a path and its location, thereby improving coverage and accuracy.
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Figure CN2024084900_02102025_PF_FP_ABST
Abstract
Description
METHODS, DEVICES AND COMPUTER STORAGE MEDIA OF COMMUNICATIONTECHNICAL FIELD
[0001] Embodiments of the present disclosure generally relate to the field of telecommunication, and specifically relate to methods, devices, and computer storage media of communication.BACKGROUND
[0002] Coverage is a fundamental aspect of cellular network deployments. Mobile operators rely on different types of network nodes (or network devices) to offer blanket coverage in their deployments. Deployment of regular full-stack cells is one option, but it may not be always possible (for example, due to no availability of backhaul) or economically viable. Radio frequency (RF) repeaters as a new type of network nodes have been widely deployed to supplement the coverage provided by regular full-stack cells.
[0003] Network-controlled repeater is introduced by adding side control information for beam management based on RF repeater, to extend the coverage in HF with a higher efficient method. Further, reconfigurable intelligent surface (RIS) is proposed as one further evolution of a type of neighbour cell relation (NCR) .SUMMARY
[0004] In general, embodiments of the present disclosure provide devices, methods, and computer storage media of communication.
[0005] In a first aspect, there is provided a network device. The network device comprises: a processor configured to cause the first device to: transmit a first reference signal (RS) configuration to a terminal device; transmit at least one second RS configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; receive, from the terminal device, a first measurement report comprising measurement results about at least one first path; and transmit, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; receive, from the terminal device, a second measurement report comprising measurement results about at least one second path; and determine, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node.
[0006] In a second aspect, there is provided a terminal device. The terminal device comprises: a processor configured to cause the first device to: receive, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; determine at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; and determine a position of terminal device by measuring reflection signals from at least one associated intermediate node.
[0007] In a third aspect, there is provided a communication method performed by a network device. The method comprises: transmitting a first reference signal (RS) configuration to a terminal device; transmitting at least one second RS configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; receiving, from the terminal device, a first measurement report comprising measurement results about at least one first path; and transmitting, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; receiving, from the terminal device, a second measurement report comprising measurement results about at least one second path; and determining, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node.
[0008] In a fourth aspect, there is provided a communication method performed by a terminal device. The method comprises: receiving, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; determining at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; and determining a position of terminal device by measuring reflection signals from at least one associated intermediate node.
[0009] In a fifth aspect, there is provided a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to carry out the method according to the third, or fourth aspect.
[0010] Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features, and advantages of the present disclosure will become more apparent, wherein:
[0012] FIG. 1 illustrates a schematic diagram of an example communication network in which some embodiments of the present disclosure can be implemented;
[0013] FIG. 2 illustrates a signaling chart illustrating process of communication according to some example embodiments of the present disclosure;
[0014] FIG. 3A illustrates example measurement results of paths;
[0015] FIG. 3B illustrates another example measurement results of paths;
[0016] FIG. 4A to FIG. 4C illustrate examples of comparation among two measurements;
[0017] FIG. 5A and FIG. 5B illustrate schematics diagram of an example communication network;
[0018] FIG. 6 illustrates a flowchart of a communication method implemented at a network device according to some example embodiments of the present disclosure;
[0019] FIG. 7 illustrates a flowchart of a communication method implemented at a terminal device according to some example embodiments of the present disclosure; and
[0020] FIG. 8 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
[0021] Throughout the drawings, the same or similar reference numerals represent the same or similar element.DETAILED DESCRIPTION
[0022] Principle of the present disclosure will now be described with reference to some example embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. Embodiments described herein can be implemented in various manners other than the ones described below.
[0023] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0024] As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure / network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further have ‘multicast / broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM. The term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
[0025] The term “network device” refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
[0026] The terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
[0027] The terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
[0028] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator. In some embodiments, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0029] As used herein, the term “repeater device” refers to a device which can provide an amplify-and-forward function between a terminal device and a network device, especially, the terminal device may be out of coverage of the network device or may be blocked from a communication with the network device. In some embodiments, the repeater device may receive control information from the network device to enhance the amply-and-forward function. Examples of the repeater device may include, but not be limited to, an NCR and the like. For the purposes of discussion, some embodiments of the present disclosure will be discussed by taking an NCR as the example of the repeater device.
[0030] In some embodiments, the repeater device may comprise a control module and a forwarding module. The control module communicates with a network device via a control link (C-link) , for example, to receive the control information. The forwarding module performs amplify-and-forwarding of downlink (DL) / uplink (UL) RF signals between a network device and a terminal device via a backhaul link and an access link. The control and forwarding modules may be implemented as hardware, firmware, and / or algorithm-based software components of the repeater device and may be collocated or apart from each other. Examples of the control and forwarding modules may include, but not be limited to, an NCR mobile termination (NCR-MT) and an NCR forwarding (NCR-Fwd) . For the purposes of discussion, some embodiments of the present disclosure will be discussed by taking the NCR-MT and NCR-Fwd as examples of the control and forwarding modules of the repeater device.
[0031] As used herein, the term “resource, ” “transmission resource, ” “forwarding resource, ” “access resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like. In the following, unless explicitly stated, a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
[0032] The terminal device, the network device and the repeater device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function and can be used to predict some information.
[0033] The terminal or the network device may work on several frequency ranges, e.g., FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed / unlicensed / shared spectrum. The terminal device may have more than one connection with the network devices under Multi- Radio Dual Connectivity (MR-DC) application scenario. The terminal device or the network device can work on full duplex, flexible duplex, and cross division duplex modes.
[0034] The embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
[0035] In some embodiments, the terminal device may be connected to a first network device and a second network device. One of the first network device and the second network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In some embodiments, the first network device may be a first RAT device and the second network device may be a second RAT device. In some embodiments, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In some embodiments, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In some embodiments, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
[0036] 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. The term “includes” and its variants are to be read as open terms that mean “includes, but is not limited to. ” The term ‘based on’ is to be read as “at least in part based on. ” The term “one embodiment” and “an embodiment” are to be read as “at least one embodiment. ” The term “another embodiment” is to be read as “at least one other embodiment. ” The terms “first, ” “second, ” and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
[0037] In some examples, values, procedures, or apparatus are referred to as “best, ” “lowest, ” “highest, ” “minimum, ” “maximum, ” or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
[0038] As discussed above, coverage is a fundamental aspect of cellular network deployments. However, deployment of regular full-stack cells may not be always possible or economically viable. New types of nodes have been considered to increase flexibility of mobile operators for network deployments.
[0039] Radio frequency (RF) repeaters as a new type of network nodes have been widely deployed to supplement the coverage provided by regular full-stack cells. Further, RIS is proposed as one further evolution of a type of NCR.
[0040] By far, study on location or sensing based on RIS is proposed. As for as reference system, all the measurements are taken in a certain frame of reference, e.g., that of the receiver. References, sometimes called anchor points, have known states. There may be multiple position references, as in cellular localization or satellite positioning, which may in turn place requirements in terms of synchronization, array calibration, as well as dedicated control signals. The geometric placement of the reference plays an important role in the accuracy of a localization system, an effect commonly measured through the geometric dilution of precision (GDOP) .
[0041] Further, when a RIS used as a reflector, it could be interpreted in two different ways: as part of the passive environment, acting like any scatterer or reflector or refractor, or alternatively as part of the infrastructure, playing a similar role as a global reference or anchor point.
[0042] No solution has been proposed about how to schedule the RIS to improve the positioning performance of terminal device. In order to improve the positioning performance, it needs to measure and identify the channel based on RIS before scheduling the RIS according to the positioning requirements.
[0043] According to the present disclosure, a solution for an intermediate node-based (especially for an RIS-based) communication. In this solution, the first device transmits a first reference signal (RS) configuration to a terminal device; transmit at least one second RS configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; receives, from the terminal device, a first measurement report comprising measurement results about at least one first path; and transmits, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; receives, from the terminal device, a second measurement report comprising measurement results about at least one second path; and determines, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node.
[0044] In this way, the information about the intermediate node may be well identified, and thus the RIS-based positioning may be improved.
[0045] As used herein, signals reflected by an intermediate node may refer to: signals reflected by an intermediate node, signals scattered by an intermediate node, signals refracted by an intermediate node, signals diffracted by an intermediate node and so on.
[0046] The RIS is used as example of the intermediate node for describing some example embodiments of the present disclosure. It is noted that these example embodiments of the present disclosure are equally applicable to other intermediate.
[0047] Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
[0048] EXAMPLE OF COMMUNICATION NETWORK
[0049] FIG. 1 illustrates a schematic diagram of an example communication network 100 in which some embodiments of the present disclosure can be implemented.
[0050] As shown in FIG. 1, the communication network 100 may comprise a terminal device 110 and a network device 120 that may serve the terminal device 110. Between the terminal device 110 and the network device 120, there may be one or more intermediate nodes, such as, the intermediate node 130-1 to 130-4 (individually or collectively referred to as an intermediate node 130) .
[0051] Further, each intermediate node 130 may comprised a control unit 135 and an array of reflectors 138. An example of the intermediate node 130 is RIS. In particular, signals may be reflected / scattered / refracted / diffracted at the intermediate node 130.
[0052] In some embodiment, the intermediate node 130 may be turned on by default. Further, Reflecting, refracting and other operation of the intermediate node 130 is controlled by the network device 120. For example, the network device 120 provides one or more configuration parameters to the intermediate node 130, where the one or more configuration parameters include one or more of the following: gain, the number of antennas, space between antennas, phase shift of antenna, beam index, application time for the configuration / indication for reflecting / refracting signals. It should be noted that in some other cases, the intermediate node 130 may be controlled by other mode rather than the network device 120. If so, all the discussions about the network device discussed herein may be applicable to the other controller device. Merely for brevity, the same or similar contents are omitted herein.
[0053] Further, in FIG. 1, although the control unit 135 is deployed within the intermediate node 130, the control unit 135 also may be deployed outside the intermediate node 130. The present disclosure is not limited in this regard.
[0054] In some embodiments, at least below parameters may be updated by different configurations: reflecting / refracting gain (if the gain =0 or the gain is lower than a pre-defined value, the intermediate node 130 is turned off or switch to a low power consumption mode without reflecting / refracting signal) , reflecting / refracting phase (which may be indicated by beam index) , reflecting / refracting antenna’s number is (if number of antenna = 0, the intermediate node 130 is turned off or switch to a low power consumption mode) and the space between antennas.
[0055] In the example of FIG. 1, there may be a plurality of paths between the terminal device 110 and the network device 120, i.e., path 140-1 to 140-5, which are individually or collectively referred to as a path 140. Further, one or more paths may be direct path, such as, path 140-3, and one or more paths may be indirect path, such as, paths 140-1, 140-1, 140-4 and 140-5.
[0056] As illustrated in FIG. 1, an indirect path may include two sub-links: one between network device 120 and the intermediate node 130, and the other is between the intermediate node 130 and terminal device 110. Further, the direct path is not associated with the intermediate node 130, which may be line of sight (LOS) or non-line of sight (NLOS) path.
[0057] As used herein, a path via intermediate node 130 / RIS, a path associated with intermediate node 130 / RIS, an indirect path may be used interchangeably.
[0058] As used herein, term “simultaneously” refer to the time delay difference between the path and the first path is less than cyclic prefix (CP) length, then the path is defined as a path can be received simultaneously with the first path, and / or the difference of arrival (DOA) of the path is within the coverage of the beam for another path, and the AoA of the path is within the coverage of the beam for another path.
[0059] In some embodiments, the terminal device 110 and the network device 120 may communicate with each other via the intermediate node 130, or communicate with each other directly. The wireless communication channel may comprise a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a physical random-access channel (PRACH) , a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) and a physical broadcast channel (PBCH) . Of course, any other suitable channels are also feasible.
[0060] In the example of FIG. 1, in some embodiments, the terminal device 110 may include a UE and the network device 120 may include a network device serving the terminal device. In this specific example embodiment, a link from the terminal device 110 to the network device 120 is referred to as uplink, while a link from the network device 120 to the terminal device 110 is referred to as a downlink.
[0061] In downlink, the network device 120 is a transmitting (TX) device (or a transmitter) and the terminal device 110 is a receiving (RX) device (or a receiver) . Correspondingly, in uplink, the network device 120 is an RX device (or a receiver) and the terminal device 110 is a TX device (or a transmitter) .
[0062] It is to be understood that the number of devices and their connections shown in FIG. 1 are only for the purpose of illustration without suggesting any limitation. The communication environment 100A may include any suitable number of devices configured to implementing example embodiments of the present disclosure.
[0063] The communications in the communication environment 100 may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
[0064] EXAMPLE PROCESSES
[0065] Principle and implementations of the present disclosure will be described in detail below with reference to FIG. 2, which shows a signaling chart illustrating process 200 of communication according to some example embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1. As illustrated in FIG. 2, the process 200 may involve the terminal device 110, the network device 120, the intermediate node 130. In the following descriptions, an RIS may be described as an example of the intermediate node 130.
[0066] In the following descriptions, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, 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 that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0067] It is to be understood that the operations at the terminal device110 and the network device120 should be coordinated. In other words, the network device120 and the terminal device110 should have common understanding about configurations, parameters and so on. Such common understanding may be implemented by any suitable interactions between the network device120 and the terminal device110 or both the network device120 and the terminal device110 applying the same rule / policy. In the following, although some operations are described from a perspective of the terminal device110, it is to be understood that the corresponding operations should be performed by the network device120. Similarly, although some operations are described from a perspective of the network device120, it is to be understood that the corresponding operations should be performed by the terminal device110. Merely for brevity, some of the same or similar contents are omitted here.
[0068] In addition, in the following description, some interactions are performed among the terminal device110 and the network device120 (such as, exchanging first and second information and so on) . It is to be understood that the interactions may be implemented either in one single signaling / message / configuration or multiple signaling / messages / configurations, including system information, a radio resource control (RRC) signalling, downlink control information (DCI) , uplink control information (UCI) , media access control (MAC) control element (CE) and so on. The present disclosure is not limited in this regard.
[0069] In operation, the network device 120 provides (210) related RS configuration to the terminal device and the intermediate node (s) 130. As illustrated in FIG. 2, the network device 120 transmits a first reference signal (RS) configuration to a terminal device 110 and further transmit at least one second RS configuration to at least one intermediate node 130.
[0070] Then, the network device 120 performs (215) RS transmission. As illustrated in FIG. 2, the RS transmission may be transmitted to the terminal device 110 directly and / or may be transmitted to the terminal device 110 via the intermediate node (s) 130, for example, the RS signals from the network device 120 may be reflected by the intermediate node (s) 130, and the reflected signals may be received by the terminal device 110.
[0071] As for the terminal device 110, the terminal device 110 may determine (220) the RS measurements per path based on the received signals (from the network device 120 and / or the intermediate node (s) 130) .
[0072] Then, the terminal device 110 transmits (225) a first measurement report to the network device 120, where the first measurement report comprises measurement results about at least one first path (i.e., the measured path) .
[0073] According to the present disclosure, the network device 120 may determine (230) new configuration (referred to as third RS configuration) for reflecting / refracting the RS at the intermedia node (s) 130 according to the reported measurements. As illustrated in FIG. 2, the network device 120 mat transmit, a third RS configuration to a first intermediate node of the at least one intermediate node 130 (also may transit other third RS configuration to other intermediate node (s) 130) , where the third RS configuration is different from the second RS configuration configured for the first intermediate node.
[0074] After that, the RS transmission may be further transmitted (240) to the terminal device 110 directly and / or may be transmitted to the terminal device 110 via the intermediate node (s) 130.
[0075] As for the terminal device 110, the terminal device 110 may determine (245) the measurements per path based on the new received RS signals. Then, the terminal device 110 may transmit (250) a second measurement report to the network device 110. Similar with the first measurement report, the second measurement report may comprise measurement results about at least one second path.
[0076] Based on the measurement results about at least one first path and the measurement results about at least one second path, the network device 110 may determine (255) first information of the first intermediate node, where the first information comprises at least one of the following:
[0077] ● whether the first intermediate node is associated with a path between the network device 120 and the terminal device 110, or
[0078] ● location information of the first intermediate node, and the location information may be the range / distance between the first intermediate node and the terminal device 110.
[0079] It can be seen, as for a path associated with the intermediate node 130, the network device 120 may measure and identify the path by configuring at least two sets of resources in different time (i.e., one is associated with the second RS configuration and the other is associated with the third RS configuration) . Thus, the network device 120 may receive two measurement results. The network device 120 may identify the path (es) by comparing the reported measurements corresponding to the two resource sets.
[0080] In some embodiments, the terminal device 110 may detect a plurality of paths. If so, the terminal device 120 may select part of the plurality of paths to report. For example, if a value of a measurement result is higher than a threshold, the terminal device 110 may report the path. In other words, only the path the reference signal received path power (RSRPP) of which is larger than a pre-defined / pre-configured value is reported, and the number of paths meets the reporting condition is M0. Further, the maximum number of paths to be reported may be represented M1, which may be pre-defined. In some embodiments, the number of reported paths is min (M1, M0) .
[0081] Additionally, as for the network device 120, after receiving the measurement report, the network device 120 also may select part of the intermediate node (s) 130 (i.e., part of the paths) , and then update the RS configuration (s) of the selected intermediate node (s) 130.
[0082] In operation, in addition to transmit the third RS configuration to the first intermediate node, the network device 120 also may transmit at least one further third RS configuration to at least one the intermediate node 130 different from the first intermediate node, where each further third RS configuration is different from the second RS configuration configured for a respective intermediate node.
[0083] In some embodiments, a total number (represented as M2) of the third RS configuration and the at least one further third RS configuration is smaller than a number of the at least one first path reported in the first measurement. Alternatively, or in addition, in some embodiments, the total number equals to a number of paths with a measurement result equal to or higher than a threshold. Alternatively, or in addition, in some embodiments, the total number is equal to or smaller than a maximum number.
[0084] As discussed above, each intermediate node 130 may be associated with a second RS configuration and a third RS configuration (referred to as a group of configurations) . In operation, at least two groups of configurations are needed. In some embodiments, the number of groups is associated with the number of paths reported by UE, for example, the number of groups <= Number of paths reported, or the number of groups = Number of paths the reported RSRPP of which is larger than a predefined value. Further, the number of groups is <= a Maximum number is M2 (for example, 4) . Further, the Maximum number of paths reported is M1, and M1>=M2.
[0085] In this way, the unnecessary transmission of the third RS configuration may be avoided.
[0086] In some embodiments, a time length of a duration used for collecting measurement reports is equal to or smaller than a threshold, and each measurement result comprises measurement results about at least one path. In this way, two measurement results may have comparability, and thus the network device 120 may determine the first information of the intermediate node 130 accordingly.
[0087] In some embodiments, a second RS configuration and a third RS configuration associated with a same intermediate node 130 are received at different time. The time duration including all the resources with different configurations on associated with a same intermediate node 130 is required to be less than a threshold. In this way, the channel variance during the two resources is ignorable. In some embodiments, the threshold may be associated with the coherence time.
[0088] In the following, how to report the measurements of the paths will be discussed. In some embodiments, the first measurement report may indicates at least one of the following:
[0089] ● at least one measured signal strength of the at least one first path,
[0090] ● at least one time delay of the at least one first path, or
[0091] ● at least one direction information for receiving the at least one first path.
[0092] In some embodiments, the measured signal strength may include but not be not limited to, layer 1 (L1) -reference signal receiving power (RSRP) , RSRP, L1-signal to interference plus noise ratio (SINR) , SINR, L1-received signal strength indication (RSSI) , RSSI, L1-reference signal receiving quality (RSRQ) , RSRQ and so on. All the matrices may be defined per path or per path set.
[0093] In some embodiments, the direction information may be a beam index. Further, Beam index may refer to RS ID, RS resource ID, resource set ID, antenna port ID, antenna port group ID, antenna array ID and so on.
[0094] Reference is now made to FIG. 3A, which illustrates example measurement results of paths. In the example of FIG. 3A, there are 4 paths with arriving time t0, t1, t2 and t3 respectively, and the measured signal strengths are p0, p1, p2 and p3.
[0095] In some embodiments, at least one of measured signal strength is indicated by at least one absolute measured value of the at least one first path. In the example of FIG. 3A, at least one of measured signal strength may be indicated by {p3, p1, p2, p0} in an ascending order of received power or {p0, p2, p1, p3} in a descending order of received power or {p0, p1, p2, p3} in order of received time for the path.
[0096] Alternatively, in some embodiments, one of at least one measured signal strength is used as a reference signal strength and indicated by an absolute measured value, and each of the other measured signal strengths is indciated by a differential value between an absolute measured value of the other measured signal strengths and the reference signal strength or between the absolute measured value of the other measured signal strengths and a previous absolute measured value. In the example of FIG. 3A, at least one of measured signal strength may be indicated by {p0, p0-p1, p0-p2, p0-p3} , {p3, p1-p3, p2-p1, p0-p2} , {p3, p1-p3, p2-p3, p0-p3} , {p0, p0-p2, p0-p1, p0-p3} , {p0, p0-p2, p2-p1, p1-p3} and so on. It should be understood that the reporting order of the at least one of measured signal strength may be any suitable order. The present disclosure is not limited in this regard.
[0097] The representation manner of at least one time delay is similar to that of the at least one of at least one measured signal strength. Specifically, in some embodiments, each of the at least one time delay is indicated by at least one receiving time of the at least one first path. In the example of FIG. 3A, at least one of measured signal strength may be indicated by {t0, t1, t2, t3} .
[0098] Alternatively, in some embodiments, each of the at least one time delay is indicated by a difference between the receiving time of the path and a reference time point, wherein the reference time point is synchronization time or the earliest receiving time of the at least one receiving time (for example, the first path on the present resource is taken as a reference path) . In the example of FIG. 3A, at least one of measured signal strength may be indicated by {t0-t0, t1-t0, t2-t0, t3-t0} , or {t0-tref, t1-tref, t2-tref, t3-tref} , tref is the reference time. In some embodiments, tref is the synchronization time of the terminal device 110.
[0099] The representation manner of at least one AoA is similar to that of the at least one of at least one measured signal strength. Specifically, in some embodiments, each of the at least one AoA is indicated by at least one absolute AOA value of the at least one path of the at least one first path.
[0100] Alternatively, in some embodiments, each of the at least one AoA is indicated by a difference between an absolute AoA value of the AoA and a reference AoA.
[0101] Alternatively, in some embodiments, one of at least one AoA is used as a reference AoA and indicated by an absolute AoA value, and each of the other AoAs is indciated by a differential value between an absolute AoA value of the other AoA and the reference AoA or between the absolute AoA value of the AoA and a previous absolute AoA value. As one example, the reference AoA may be a center pointing of the beam. As another example, the reference AoA may be an absolute AoA value of one path, such as the path with highest received power.
[0102] In some embodiments, a mapping relationship between reporting resource and RS resource (including time resource and beam resource) may be one-to-one. Additionally, in some embodiments, time information for the resources determining the measurements is included in the reported measurements during the reporting. Specifically, in some embodiments, the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path. The second measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one second path.
[0103] In this way, as the network device 120 may know the time for transmitting the second / third RS configuration, and thus the network device 120 may know the received measurement results are obtained based on which RS configuration.
[0104] In the following, how to adjust the RS configuration for the intermediate nodes 130 will be discussed. In some embodiments, the third RS configuration may be different from the second RS configuration in at least one of the following aspects:
[0105] ● a reflecting gain,
[0106] ● a reflecting phase,
[0107] ● a space between antennas used for reflecting, or
[0108] ● a number of antennas used for reflecting.
[0109] In some embodiments, the network device 120 may determine a path by comparing the measurement results about at least one first path and the measurement results about at least one second path, where a comparation result indicates a measurement result of the path is changed; and in accordance with a determination that the change is aligned with the difference between the two configurations for the first intermediate node, determine the path is associated with the first intermediate node.
[0110] Reference is now made to FIG. 3B, which illustrates an example of comparation among two measurements. In FIG. 3B, as there is no change, the measurement results are generally the same.
[0111] FIG. 4A and FIG. 4B illustrate examples of comparation among two measurements, where there are 3 paths and two intermediate nodes 130.
[0112] In the Example A of FIG. 4A, after receiving the first measurement report, the network device 120 may increase reflecting gain of intermediate node #1 (or increase the number of antennas of intermediate node #1) . After that, the second measurement report may be received. By comparing the first and second measurements, the network device 120 may notice that one measurement result of a path has increased. Thus, the network device 120 may understand the intermediate node #1 is an associated intermediate node of the terminal device 110.
[0113] In the example of Example A of FIG. 4A, the downlink gain from intermediate node #1 to terminal device 110 is updated / reconfigured / increased. By comparing p1 and p1’ , or the increased gain Δp, the path with delay t1 is identified as one path assisted by intermediate node #1.
[0114] In the Example B of FIG. 4A, after receiving the first measurement report, the network device 120 may decrease reflecting gain of intermediate node #1 (or decrease the number of antennas of intermediate node #1) . After that, the second measurement report may be received. By comparing the first and second measurements, the network device 120 may notice that one measurement result of a path have decreased. Thus, the network device 120 may understand the intermediate node #1 is an associated intermediate node of the terminal device 110.
[0115] In the Example A of FIG. 4B, after receiving the first measurement report, the network device 120 may change the reflecting phase from reflecting phase #1 to reflecting phase #2 (by indicating phase shift value, or indicate beam index) . After that, the second measurement report may be received. By comparing the first and second measurements, the network device 120 may notice that one measurement result of a path has increased. That is because, compared to the reflecting phase #1, reflecting phase #2 makes the path nearer to a central of the beam, and thus case an increasing of the measured signal strength. Thus, the network device 120 may understand the intermediate node #1 is an associated intermediate node of the terminal device 110.
[0116] In the Example B of FIG. 4B, after receiving the first measurement report, the network device 120 may change the reflecting phase from reflecting phase #2 to reflecting phase #1. After that, the second measurement report may be received. By comparing the first and second measurements, the network device 120 may notice that one measurement result of a path have decreased. That is because, compared to the reflecting phase #2, reflecting phase #1 makes the path nearer to an edge of the beam, and thus case a decreasing of the measured signal strength. Thus, the network device 120 may understand the intermediate node #1 is an associated intermediate node of the terminal device 110.
[0117] In some embodiments, the RS configuration of more than one intermediate node 130 may be adjusted. Specifically, in some embodiments, K intermediate nodes 130 may be reconfigured by corresponding third RS configurations, and K is an integer. In this event, an adjustment gain of each a first ceil (K / 2) intermediate nodes 130 is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each a second K-ceil (K / 2) intermediate nodes 130 is decreased by a product of ‘R’ and ‘n’ , ‘R’ is an adjustment step, and ‘n’ is an integer with a value range of from 1 to ceil (K / 2) . Further, value of n is determined by the number of paths received simultaneously. The Maximum number of paths to be identified may be K0, which may be a capability reported by the terminal device. In some embodiments, ceil (K / 2) may be replaced by floor (K / 2) .
[0118] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of ceil (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-ceil (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0119] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of floor (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K- floor (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , and wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0120] Additionally, in some embodiments, the adjustment step ‘R’ is determined based on a minimum resolution used by the terminal device 110 to distinguish different paths, the larger minimum resolution, the larger value of ‘R’ .
[0121] Additionally, in some embodiments, the network device 120 may receive information about the minimum resolution from the terminal device 110.
[0122] Example processes between the terminal device 110 and the network device 120 are discussed with reference to below table 1-1 to 1-4. Below table 1-1 illustrates measured signal strengths reported in first measurement report.
[0123] Table 1-1
[0124] As for the network device 120, after receiving the first measurement report, the network device 120 may adjust the RIS #1 to #5 as below table 1-2.
[0125] Table 1-2
[0126] Below table 1-3 illustrates a measured signal strengths reported in a second measurement report.
[0127] Table 1-3
[0128] As for the network device 120, a comparation result may be obtained as illustrated in below Table 1-4.
[0129] Table 1-4
[0130] By comparing the first and second measurements results, the network device 120 may determine that intermediate nodes #1, #2, #4 and #5 are associated with the terminal device 110, and path#3 isn’ t associated with any intermediate node, intermediate node#3 isn’ t associated with any path too. More specifically, the intermediate node #1 is associated with path #4 (as the adjustment value of the intermediate node #1 is -4 and the change value of path #4 is -4) , the intermediate node #2 is associated with path #2 (as the adjustment value of the intermediate node #1 is -2 and the change value of path #4 is -2) , the intermediate node #4 is associated with path #4 (as the adjustment value of the intermediate node #4 is +4 and the change value of path #1 is _4) , the intermediate node #5 is associated with path #5 (as the adjustment value of the intermediate node #5 is +6 and the change value of path #4 is +6) . Further, as the adjustment value of the intermediate node #5 is +2, and no change value is aligned with this adjustment value, and thus intermediate node#3 is not associated with any path (i.e., the intermediate node#3 is not associated with the terminal device 110) .
[0131] It should be understood that the above specific example discussed with reference to tables 1, 1-1 to 1-4 are only for the purpose of illustration without suggesting any limitations. Actually, the number of paths / intermediate nodes, the adjustments, the measured signal strengths may be changed according to specific scenarios.
[0132] Reference is now made to FIG. 4C, FIG. 4C illustrates an example of comparation among two measurements, where the reflecting gain of intermediate node #1 increases and the reflecting gain of intermediate node #2 decreases. In this example, both the intermediate node #1 and the intermediate node #2 are identified once.
[0133] In some embodiments, the network device 120 may further determine a distance between the first intermediate node and the terminal device 110 based on the location of the first intermediate node and the measurement result of the first intermediate node.
[0134] According to the above processes, the network device 120 may determine a set of associated intermediate nodes 130 of the terminal device 110, each of the set of associated intermediate nodes 130 being associated with a path between the network device 120 and the terminal device 110.
[0135] With the determination of associated intermediate node, a further information including the distance between the intermediate node and the terminal device, the angle of the link between the intermediate node and the terminal device is determined according to the reported measurement. In some embodiments, the location information of intermediate node is shared to network device, the network device estimates the distance by excluded the influence of the first sub-link between network device and the intermediate node.
[0136] Then, the network device 120 may further determine (260) at least one associated intermediate node 130 from the set of associated intermediate nodes 130 for assisting positioning measurement of the terminal device 110 based on at least one of the following:
[0137] ● a resource associated with the intermediate node, or
[0138] ● a distance between the intermediate node 130 and the terminal device 110.
[0139] In some embodiments, the network device 120 may determine the associated intermediate node 130 to be an intermediate node 130 for assisting positioning measurement in accordance with at least one of the following:
[0140] ● a determination that the associated intermediate node 130 is associated with a resource associated with at least one further associated intermediate node,
[0141] ● a determination that the associated intermediate node 130 is associated with a resource associated with a LOS path between the network device 120 and the terminal device 110, determine the intermediate node 130 as an intermediate node 130 for assisting positioning measurement, or
[0142] ● a determination that a distance between the associated intermediate node 130 and the terminal device 110 is equal to or smaller than a threshold.
[0143] In some embodiments, it is expected to achieve a minimum the number of resources needed for determining the location / position of the terminal device 110. In operation, the resource for positioning is chosen in descending order of the number of paths associated with an intermediate node 130. Thus, the intermediate node 130 which has at least two associated with an intermediate node 130 may be selected first. In this way, only one RTT time is needed to report to determine the location, that is because measurement information related to more than one reference / anchor points may be obtained based on the once reporting of multiple paths assisted by multiple intermediate nodes.
[0144] In some embodiments, the resource for positioning is chosen in descending order of the sum of (LOS path, number of paths assisted by RIS) , where the LOS path is illustrated by a probability larger than a predefine value (such as 80%) . Generally speaking, the larger RSRPP corresponds to the higher LOS probability, and / or the less time delay corresponds to a higher LOS probability. In operation, the resource with LOS path is chosen first, then according to the descending order of the number of paths associated with different intermediate node 130.
[0145] In some embodiments, if the measurement based on a single resource is not enough to get the location information, then the network device 120 choose the second resource according to the previous positioning results. Reference is now made to FIG. 5A. In the example of FIG. 5A, a location range may be determined based on previous measurements, then additional intermediate node (520-1 or 520-1) near the possible location (or near to one possible central point and / or far away to another possible central point, such that large delay / received power difference between the two central points is present when any intermediate node 130 is applied.
[0146] In some embodiments, the chosen intermediate node 130 is then indicated to be turn on with configured {beam index, gain, time resource} , or {direction, activated antennas, gain, time resource} and so on, where the possible locations are position 510-1 and 510-2 in FIG. 5.
[0147] In some embodiments, when scheduling the intermediate node 130, a higher accuracy of positioning is expected, which may be achieved by reducing the distance between anchor point (RIS) and the terminal device 110, as illustrated in FIG. 5B. In operation, the intermediate node 130 is chosen in the ascending order of distance between the intermediate node 130 and terminal device 110.
[0148] In some embodiments, the related resource is activated / chosen as resource for positioning.
[0149] In some embodiments, the resource is chosen in the descending order of number of paths assisted by RIS and the distance between the intermediate node 130 and terminal device 110 is less than a predefined / preconfigured value.
[0150] In some embodiments, if one resource can’ t get the accurate location information, then further resource / RIS can be chosen based on the previous results, as discussed above.
[0151] Continue to refer to FIG. 2. As illustrated, the network device 120 may transmit, to the terminal device 110, a message comprising a set of first information of a set of associated intermediate nodes 130 of the terminal device 110, each of the set of associated intermediate nodes 130 being associated with a path between the network device 120 and the terminal device 110.
[0152] Based on the set of first information of a set of associated intermediate nodes 130, the terminal device 110 may determine at least one associated intermediate node 130 from the set of associated intermediate nodes 130 for performing positioning measurement, and determine a position of terminal device 110 by measuring reflection signals from at least one associated intermediate node.
[0153] In some embodiments, the terminal device 110 may determine the associated intermediate node 130 to be an intermediate node 130 for assisting positioning measurement in accordance with at least one of the following:
[0154] ● a determination that the associated intermediate node 130 is associated with a resource associated with at least one further associated intermediate node,
[0155] ● a determination that the associated intermediate node 130 is associated with a resource associated with a LOS path between the network device 120 and the terminal device 110, determine the intermediate node 130 as an intermediate node 130 for assisting positioning measurement, or
[0156] ● a determination that a distance between the associated intermediate node 130 and the terminal device 110 is equal to or smaller than a threshold.
[0157] That is, the set of first information of a set of associated intermediate nodes 130 may be known to terminal device 110 (for example, the network device 120 shares the set of first information of a set of associated intermediate nodes 130 to the terminal device 110 via additional signaling (s) ) . In some embodiments, information of the intermediate nodes 130 which introduces new path to a UE is indicated to the terminal device 110, including the index of the intermediate nodes 130 for each of the paths associated with an intermediate node 130.
[0158] With the set of first information of a set of associated intermediate nodes 130, the terminal device 110 may determine the position results directly. Additionally, the terminal device 110 may send a requirement on which intermediate node (s) 130 is (are) preferred for further positioning, where the requirement may include {RIS index, direction information} .
[0159] In some cases, there may be only one intermediate node 130. In this event, when updating the RS configuration of the intermediate node 130, turn off the RIS directly may be a simplest way for the second round measurement if only one path is detected on the resource and only one RIS is activated.
[0160] Additionally, all the other processes for this specific scenario where there is only one intermediate node 130 are similar to the processes discussed for the scenario where more than one intermediate node 130 are involved. Merely for brevity, the same or similar contents are omitted herein.
[0161] EXAMPLE METHODS
[0162] FIG. 6 illustrates a flowchart of a communication method 600 implemented at a network device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the network device 120 in FIG. 1.
[0163] At block 610, the network device transmits a first reference signal (RS) configuration to a terminal device.
[0164] At block 620, the network device transmits at least one second reference signal (RS) configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device.
[0165] At block 630, the network device receives, from the terminal device, a first measurement report comprising measurement results about at least one first path.
[0166] At block 640, the network device transmits, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node.
[0167] At block 650, the network device receives, from the terminal device, a second measurement report comprising measurement results about at least one second path.
[0168] At block 660, the network device determines, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node.
[0169] In some example embodiments, the network device may transmit, at least one further third RS configuration to at least one the intermediate node different from the first intermediate node, each further third RS configuration being different from the second RS configuration configured for a respective intermediate node, wherein a total number of the third RS configuration and the at least one further third RS configuration is smaller than a number of the at least one first path reported in the first measurement, or wherein the total number equals to a number of path with a measurement result equal to or higher than a threshold, or wherein the total number is equal to or smaller than a maximum number.
[0170] In some example embodiments, a time length of a duration used for collecting measurement reports is equal to or smaller than a threshold, and each measurement result comprises measurement results about at least one path.
[0171] In some example embodiments, third RS configuration is different from the second RS configuration in at least one of the following aspects: a reflecting gain, a reflecting phase, a space between antennas used for reflecting, or a number of antennas used for reflecting.
[0172] In some example embodiments, the first measurement report indicates at least one of the following: at least one measured signal strength of the at least one first path, at least one time delay of the at least one first path, or at least one direction information for receiving the at least one first path.
[0173] In some example embodiments, the reference time point is synchronization time or the earliest receiving time of the at least one receiving time, or each of the at least one AoA is indicated by at least one absolute AOA value of the at least one path of the at least one first path, each of the at least one AoA is indicated by a difference between an absolute AoA value of the AoA and a reference AoA, or one of at least one AoA is used as a reference AoA and indicated by an absolute AoA value, and each of the other AoAs is indicated by a differential value between an absolute AoA value of the other AoA and the reference AoA or between the absolute AoA value of the AoA and a previous absolute AoA value.
[0174] In some example embodiments, the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.
[0175] In some example embodiments, 2K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer, and wherein, an adjustment gain of each a first K intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each a second K intermediate nodes is decreased by a product of ‘R’ and ‘n’ , ‘R’ is an adjustment step, and ‘n’ is an integer with a value range of from 1 to K.
[0176] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of ceil (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-ceil (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0177] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of floor (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-floor (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , and wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0178] Additionally, in some embodiments, the adjustment step ‘R’ is determined based on a minimum resolution used by the terminal device 110 to distinguish different paths, the larger minimum resolution, the larger value of ‘R’ .
[0179] In some example embodiments, the adjustment step ‘R’ is determined based on a minimum resolution used by the terminal device to distinguish different paths.
[0180] In some example embodiments, the network device may receive information about the minimum resolution from the terminal device.
[0181] In some example embodiments, the network device may determine a path by comparing the measurement results about at least one first path and the measurement results about at least one second path, a comparation result indicating a measurement result of the path is changed; and in accordance with a determination that the change is aligned with the difference between the two configurations for the first intermediate node, determine the path is associated with the first intermediate node.
[0182] In some example embodiments, the network device may determine a distance between the first intermediate node and the terminal device based on the location of the first intermediate node and the measurement result of the first intermediate node.
[0183] In some example embodiments, the network device may determine a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; and determine at least one associated intermediate node from the set of associated intermediate nodes for assisting positioning measurement of the terminal device based on at least one of the following: a resource associated with the intermediate node, or a distance between the intermediate node and the terminal device.
[0184] In some example embodiments, the network device may determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following: a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node, a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, or a determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.
[0185] In some example embodiments, the network device may transmit, to the terminal device, a message comprising a set of first information of a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device.
[0186] In some example embodiments, the intermediate node is a reconfigurable intelligent surface (RIS) .
[0187] FIG. 7 illustrates a flowchart of a communication method 700 implemented at a terminal device in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 700 will be described from the perspective of the terminal device 110 in FIG. 1.
[0188] At block 710, receive, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device.
[0189] At block 720, determine at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement.
[0190] At block 730, determine a position of terminal device by measuring reflection signals from at least one associated intermediate node.
[0191] In some example embodiments, the terminal device may determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following: a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node, a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, or a determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.
[0192] In some example embodiments, the terminal device may receive, from the network device, a first reference signal (RS) configuration; perform measurements based on first RS configuration; and transmit, to the network device, a first measurement report indicating measurement results about at least one first path, at least part of the at least one first path is indirect path and associates with an intermediate node; and continue to perform measurements based on first RS configuration; and transmit, to the network device, a second measurement report indicating measurement results about at least one second path.
[0193] In some example embodiments, a value of a measurement result of each of at least one first path and at least one second path is higher than a threshold.
[0194] In some example embodiments, the first measurement report indicates at least one of the following: at least one measured signal strength of the at least one first path, at least one time delay of the at least one first path, or at least one direction information for receiving the at least one first path.
[0195] In some example embodiments, the reference time point is synchronization time or the earliest receiving time of the at least one receiving time, or each of the at least one AoA is indicated by at least one absolute AOA value of the at least one path of the at least one first path, each of the at least one AoA is indicated by a difference between an absolute AoA value of the AoA and a reference AoA, or one of at least one AoA is used as a reference AoA and indicated by an absolute AoA value, and each of the other AoAs is indicated by a differential value between an absolute AoA value of the other AoA and the reference AoA or between the absolute AoA value of the AoA and a previous absolute AoA value.
[0196] In some example embodiments, the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.
[0197] In some example embodiments, the terminal device may transmit information about a minimum resolution used by the terminal device to distinguish different paths to the network device.
[0198] In some example embodiments, the intermediate node is a reconfigurable intelligent surface (RIS) .
[0199] EXAMPLE DEVICES AND APPARATUS
[0200] FIG. 8 is a simplified block diagram of a device 800 that is suitable for implementing embodiments of the present disclosure. The device 800 can be considered as a further example implementation of any of the devices as shown in FIG. 1. Accordingly, the device 800 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
[0201] As shown, the device 800 includes a processor 810, a memory 820 coupled to the processor 810, a suitable transceiver 840 coupled to the processor 810, and a communication interface coupled to the transceiver 840. The memory 820 stores at least a part of a program 830. The transceiver 840 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 840 may include at least one of a transmitter 842 and a receiver 844. The transmitter 842 and the receiver 844 may be functional modules or physical entities. The transceiver 840 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2 / Xn interface for bidirectional communications between eNBs / gNBs, S1 / NG interface for communication between a Mobility Management Entity (MME) / Access and Mobility Management Function (AMF) / SGW / UPF and the eNB / gNB, Un interface for communication between the eNB / gNB and a relay node (RN) , or Uu interface for communication between the eNB / gNB and a terminal device.
[0202] The program 830 is assumed to include program instructions that, when executed by the associated processor 810, enable the device 800 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 8. The embodiments herein may be implemented by computer software executable by the processor 810 of the device 800, or by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 810 and memory 820 may form processing means 850 adapted to implement various embodiments of the present disclosure.
[0203] The memory 820 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 820 is shown in the device 800, there may be several physically distinct memory modules in the device 800. The processor 810 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 800 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
[0204] According to embodiments of the present disclosure, a network device comprising a circuitry is provided. The circuitry is configured to: transmit a first reference signal (RS) configuration to a terminal device; transmit at least one second reference signal (RS) configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; receive, from the terminal device, a first measurement report comprising measurement results about at least one first path; and transmit, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; receive, from the terminal device, a second measurement report comprising measurement results about at least one second path; and determine, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the network device as discussed above.
[0205] According to embodiments of the present disclosure, a terminal device comprising a circuitry is provided. The circuitry is configured to: receive, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; determine at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; and determine a position of terminal device by measuring reflection signals from at least one associated intermediate node. According to embodiments of the present disclosure, the circuitry may be configured to perform any method implemented by the terminal device as discussed above.
[0206] The term “circuitry” used herein may refer to hardware circuits and / or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and / or digital hardware circuits with software / firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software / firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and / or firmware.
[0207] According to embodiments of the present disclosure, a network apparatus is provided. The network apparatus comprises means for transmitting a first reference signal (RS) configuration to a terminal device; means for transmitting at least one second reference signal (RS) configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; means for receiving, from the terminal device, a first measurement report comprising measurement results about at least one first path; and means for transmitting, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; means for receiving, from the terminal device, a second measurement report comprising measurement results about at least one second path; and means for determining, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: means for whether the first intermediate node is associated with a path between the network device and the terminal device, or means for location information of the first intermediate node. In some embodiments, the first apparatus may comprise means for performing the respective operations of the method 600. In some example embodiments, the first apparatus may further comprise means for performing other operations in some example embodiments of the method 600. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0208] According to embodiments of the present disclosure, a terminal apparatus is provided. The terminal apparatus comprises means for receiving, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; means for determining at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; and means for determining a position of terminal device by measuring reflection signals from at least one associated intermediate node. In some embodiments, the second apparatus may comprise means for performing the respective operations of the method 700. In some example embodiments, the second apparatus may further comprise means for performing other operations in some example embodiments of the method 700. The means may be implemented in any suitable form. For example, the means may be implemented in a circuitry or software module.
[0209] In summary, embodiments of the present disclosure provide the following aspects.
[0210] In an aspect, it is proposed a network device comprising: the first device may transmit a first reference signal (RS) configuration to a terminal device; transmit at least one second reference signal (RS) configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device; receive, from the terminal device, a first measurement report comprising measurement results about at least one first path; and transmit, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node; receive, from the terminal device, a second measurement report comprising measurement results about at least one second path; and determine, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following: whether the first intermediate node is associated with a path between the network device and the terminal device, or location information of the first intermediate node.
[0211] In some embodiments, the network device may transmit, at least one further third RS configuration to at least one the intermediate node different from the first intermediate node, each further third RS configuration being different from the second RS configuration configured for a respective intermediate node, wherein a total number of the third RS configuration and the at least one further third RS configuration is smaller than a number of the at least one first path reported in the first measurement, or wherein the total number equals to a number of path with a measurement result equal to or higher than a threshold, or wherein the total number is equal to or smaller than a maximum number.
[0212] In some embodiments, a time length of a duration used for collecting measurement reports is equal to or smaller than a threshold, and each measurement result comprises measurement results about at least one path.
[0213] In some embodiments, third RS configuration is different from the second RS configuration in at least one of the following aspects: a reflecting gain, a reflecting phase, a space between antennas used for reflecting, or a number of antennas used for reflecting.
[0214] In some embodiments, the first measurement report indicates at least one of the following: at least one measured signal strength of the at least one first path, at least one time delay of the at least one first path, or at least one direction information for receiving the at least one first path.
[0215] In some embodiments, the reference time point is synchronization time or the earliest receiving time of the at least one receiving time, or each of the at least one AoA is indicated by at least one absolute AOA value of the at least one path of the at least one first path, each of the at least one AoA is indicated by a difference between an absolute AoA value of the AoA and a reference AoA, or one of at least one AoA is used as a reference AoA and indicated by an absolute AoA value, and each of the other AoAs is indicated by a differential value between an absolute AoA value of the other AoA and the reference AoA or between the absolute AoA value of the AoA and a previous absolute AoA value.
[0216] In some embodiments, the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.
[0217] In some embodiments, 2K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer, and wherein, an adjustment gain of each a first K intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each a second K intermediate nodes is decreased by a product of ‘R’ a nd ‘n’ , ‘R’ is an adjustment step, and ‘n’ is an integer with a value range of from 1 to K.
[0218] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of ceil (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-ceil (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0219] In some embodiments, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer. An adjustment gain of each of floor (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-floor (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , and wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .
[0220] Additionally, in some embodiments, the adjustment step ‘R’ is determined based on a minimum resolution used by the terminal device 110 to distinguish different paths, the larger minimum resolution, the larger value of ‘R’ .
[0221] In some embodiments, the adjustment step ‘R’ is determined based on a minimum resolution used by the terminal device to distinguish different paths.
[0222] In some embodiments, the network device may receive information about the minimum resolution from the terminal device.
[0223] In some embodiments, the network device may determine a path by comparing the measurement results about at least one first path and the measurement results about at least one second path, a comparation result indicating a measurement result of the path is changed; and in accordance with a determination that the change is aligned with the difference between the two configurations for the first intermediate node, determine the path is associated with the first intermediate node.
[0224] In some embodiments, the network device may determine a distance between the first intermediate node and the terminal device based on the location of the first intermediate node and the measurement result of the first intermediate node.
[0225] In some embodiments, the network device may determine a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; and determine at least one associated intermediate node from the set of associated intermediate nodes for assisting positioning measurement of the terminal device based on at least one of the following: a resource associated with the intermediate node, or a distance between the intermediate node and the terminal device.
[0226] In some embodiments, the network device may determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following: a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node, a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, or a determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.
[0227] In some embodiments, the network device may transmit, to the terminal device, a message comprising a set of first information of a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device.
[0228] In some embodiments, the intermediate node is a reconfigurable intelligent surface (RIS) .
[0229] In an aspect, it is proposed a terminal device comprising: the first device may receive, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; determine at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; and determine a position of terminal device by measuring reflection signals from at least one associated intermediate node.
[0230] In some embodiments, the terminal device may determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following: a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node, a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, or a determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.
[0231] In some embodiments, the terminal device may receive, from the network device, a first reference signal (RS) configuration; perform measurements based on first RS configuration; and transmit, to the network device, a first measurement report indicating measurement results about at least one first path, at least part of the at least one first path is indirect path and associates with an intermediate node; and continue to perform measurements based on first RS configuration; and transmit, to the network device, a second measurement report indicating measurement results about at least one second path.
[0232] In some embodiments, a value of a measurement result of each of at least one first path and at least one second path is higher than a threshold.
[0233] In some embodiments, the first measurement report indicates at least one of the following: at least one measured signal strength of the at least one first path, at least one time delay of the at least one first path, or at least one direction information for receiving the at least one first path.
[0234] In some embodiments, the reference time point is synchronization time or the earliest receiving time of the at least one receiving time, or each of the at least one AoA is indicated by at least one absolute AOA value of the at least one path of the at least one first path, each of the at least one AoA is indicated by a difference between an absolute AoA value of the AoA and a reference AoA, or one of at least one AoA is used as a reference AoA and indicated by an absolute AoA value, and each of the other AoAs is indicated by a differential value between an absolute AoA value of the other AoA and the reference AoA or between the absolute AoA value of the AoA and a previous absolute AoA value.
[0235] In some embodiments, the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.
[0236] In some embodiments, the terminal device may transmit information about a minimum resolution used by the terminal device to distinguish different paths to the network device.
[0237] In some embodiments, the intermediate node is a reconfigurable intelligent surface (RIS) .
[0238] In an aspect, a network device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the network device discussed above.
[0239] In an aspect, a terminal device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the terminal device discussed above.
[0240] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0241] In an aspect, a computer readable medium having instructions stored thereon, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0242] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the network device discussed above.
[0243] In an aspect, a computer program comprising instructions, the instructions, when executed on at least one processor, causing the at least one processor to perform the method implemented by the terminal device discussed above.
[0244] Generally, 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 which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
[0245] 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, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGS. 1 to 8. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
[0246] Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
[0247] The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, 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.
[0248] Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, 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 that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
[0249] Although the present disclosure has been described in language specific to structural features and / or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims
1.A network device comprising:a processor configured to cause the network device to:transmit a first reference signal (RS) configuration to a terminal device;transmit at least one second RS configuration to at least one intermediate node, wherein the intermediate node reflects RSs from the network device;receive, from the terminal device, a first measurement report comprising measurement results about at least one first path; andtransmit, a third RS configuration to a first intermediate node of the at least one intermediate node, the third RS configuration being different from the second RS configuration configured for the first intermediate node;receive, from the terminal device, a second measurement report comprising measurement results about at least one second path; anddetermine, based on the measurement results about at least one first path and the measurement results about at least one second path, first information of the first intermediate node comprises at least one of the following:whether the first intermediate node is associated with a path between the network device and the terminal device, orlocation information of the first intermediate node.2.The network device of claim 1, wherein a time length of a duration used for collecting measurement reports is equal to or smaller than a threshold, and each measurement result comprises measurement results about at least one path.3.The network device of claim 1, wherein third RS configuration is different from the second RS configuration in at least one of the following aspects:a reflecting gain,a reflecting phase,a space between antennas used for reflecting, ora number of antennas used for reflecting.4.The network device of claim 1, wherein the first measurement report indicates at least one of the following:at least one measured signal strength of the at least one first path,at least one time delay of the at least one first path, orat least one direction information for receiving the at least one first path.5.The network device of claim 1, wherein the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.6.The network device of claim 1, wherein, K intermediate nodes are reconfigured by corresponding third RS configurations, and K is an integer, and wherein,an adjustment gain of each of ceil (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-ceil (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ , oran adjustment gain of each of floor (K / 2) intermediate nodes is increased by a product of ‘R’ and ‘n’ , and an adjustment gain of each of the other K-floor (K / 2) intermediate nodes is decreased by a product of ‘R’ and ‘m’ ,and wherein ‘R’ is an adjustment step, and ‘n’ and ‘m’ are integers with a value smaller than or equal to ceil (K / 2) .7.The network device of claim 1, wherein the processor is further configured to cause the network device to:determine a path by comparing the measurement results about at least one first path and the measurement results about at least one second path, a comparation result indicating a measurement result of the path is changed; andin accordance with a determination that the change is aligned with the difference between the two configurations for the first intermediate node, determine the path is associated with the first intermediate node.8.The network device of claim 7, wherein the processor is further configured to cause the network device to:determine a distance between the first intermediate node and the terminal device based on the location of the first intermediate node and the measurement result of the first intermediate node.9.The network device of claim 1, wherein the processor is further configured to cause the network device to:determine a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device; anddetermine at least one associated intermediate node from the set of associated intermediate nodes for assisting positioning measurement of the terminal device based on at least one of the following:a resource associated with the intermediate node, ora distance between the intermediate node and the terminal device.10.The network device of claim 9, wherein the processor is further configured to cause the network device to:determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following:a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node,a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, ora determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.11.The network device of claim 1, wherein the processor is further configured to cause the network device to:transmit, to the terminal device, a message comprising a set of first information of a set of associated intermediate nodes of the terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device.12.The network device of claim 1, wherein the intermediate node is a reconfigurable intelligent surface (RIS) .13.A terminal device comprising:a processor configured to cause the first device to:receive, from a network device, a message comprising a set of first information of a set of associated intermediate nodes of a terminal device, each of the set of associated intermediate nodes being associated with a path between the network device and the terminal device;determine at least one associated intermediate node from the set of associated intermediate nodes for performing positioning measurement; anddetermine a position of terminal device by measuring reflection signals from at least one associated intermediate node.14.The terminal device of claim 13, wherein the processor is further configured to cause the terminal device to:determine the associated intermediate node to be an intermediate node for assisting positioning measurement in accordance with at least one of the following:a determination that the associated intermediate node is associated with a resource associated with at least one further associated intermediate node,a determination that the associated intermediate node is associated with a resource associated with a direct path between the network device and the terminal device, determine the intermediate node as an intermediate node for assisting positioning measurement, ora determination that a distance between the associated intermediate node and the terminal device is equal to or smaller than a threshold.15.The terminal device of claim 13, wherein the processor is further configured to cause the terminal device to:receive, from the network device, a first reference signal (RS) configuration;perform measurements based on first RS configuration; andtransmit, to the network device, a first measurement report indicating measurement results about at least one first path, at least part of the at least one first path is indirect path and associates with an intermediate node; andcontinue to perform measurements based on first RS configuration; andtransmit, to the network device, a second measurement report indicating measurement results about at least one second path.16.The terminal device of claim 15, wherein a value of a measurement result of each of at least one first path and at least one second path is higher than a threshold.17.The terminal device of claim 15, wherein the first measurement report indicates at least one of the following:at least one measured signal strength of the at least one first path,at least one time delay of the at least one first path, orat least one direction information for receiving the at least one first path.18.The terminal device of claim 15, wherein the first measurement further comprises an indication indicating time information of a resource used for obtaining the measurement results about at least one first path.19.The terminal device of claim 13, wherein the processor is further configured to cause the terminal device to:transmit information about a minimum resolution used by the terminal device to distinguish different paths to the network device.20.The terminal device of claim 13, wherein the intermediate node is a reconfigurable intelligent surface (RIS) .
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