Object searching method and device based on label equipment

Abstract

The invention provides an object searching method and device based on label equipment, and belongs to the technical field of wireless communication. The object searching method based on the tag device comprises the steps that an access network element receives a first instruction, the first instruction indicates searching of a target tag device, and the first instruction carries a target identifier of the target tag device; the network element of the access network configures report and measurement configuration information for the terminal in the preset query area according to the target identifier, and sends the report and measurement configuration information to the terminal; the network element of the access network determines a sending position of the reference signal according to the target identifier, and sends the reference signal at the sending position; and the network element of the access network receives the measurement report of the reference signal reported by the terminal, and determines whether the target label device exists near the terminal according to the measurement report. According to the technical scheme provided by the invention, the aim of searching objects in a wide area network by using the existing terminal can be fulfilled.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technology, and in particular to a method and device for finding an object based on a tag device. Background Art

[0002] In the existing technology, dedicated equipment can be used to achieve object search. The dedicated equipment sends out Bluetooth signals so that terminals near it in the "search" network can detect them. The terminals can send the location of the dedicated equipment to the network and provide it to the user. However, the cost of such dedicated equipment is relatively high and it needs to have the ability to actively transmit beacons. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and device for finding objects based on tag devices, which can achieve the purpose of finding objects in a wide area network by utilizing existing terminals.

[0004] To solve the above technical problems, the embodiments of the present invention provide the following technical solutions:

[0005] A method for finding an object based on a tag device, comprising:

[0006] The access network element receives a first instruction, wherein the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device;

[0007] The access network element configures reporting and measurement configuration information for a terminal in a preset query area according to the target identifier, and sends the reporting and measurement configuration information to the terminal;

[0008] The access network element determines a sending position of a reference signal according to the target identifier, and sends the reference signal at the sending position;

[0009] The access network element receives a measurement report of the reference signal reported by the terminal, and determines whether the target tag device exists near the terminal according to the measurement report.

[0010] In some embodiments, the method further comprises:

[0011] The access network element sends a second instruction to the target tag device, so that the target tag device performs frequency shift forwarding on the reference signal according to the second instruction, and the second instruction carries the target identifier.

[0012] In some embodiments, the frequency shift forwarding is that the target tag device frequency shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the target tag device.

[0013] In some embodiments, determining whether the target tag device exists near the terminal according to the measurement report includes:

[0014] If the received measurement report meets the preset conditions, it is determined that the target tag device exists near the terminal, and the preset conditions include: N consecutive measurement reports from the same terminal indicate that the measurement quality of the reference signal is better than a preset threshold, N is the number of frequency hopping, and N is a positive integer.

[0015] In some embodiments, if the received measurement report does not meet the preset condition, the method further includes:

[0016] Expand the scope of the preset query area.

[0017] In some embodiments, after determining that there is a target tag device near the terminal, the method further includes:

[0018] The access network element sends a third instruction to the target tag device, where the third instruction instructs the target tag device to stop performing frequency shift forwarding on the reference signal.

[0019] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0020] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0021] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal.

[0022] In some embodiments, the sending position of the reference signal in time and / or frequency and / or on the antenna port is determined by at least one of the following:

[0023] Electronic Product Code (EPC) of the target tag device;

[0024] The identification number of the terminal to which the target tag device belongs;

[0025] The ID of the group to which the target label device belongs.

[0026] In some embodiments, the reference signal is any one of the following:

[0027] Signals of fixed or variable duration;

[0028] Signals with fixed or variable bandwidth.

[0029] In some embodiments, the reference signal is any one of the following:

[0030] Channel state information reference signal CSI-RS;

[0031] Tracking reference signal TRS;

[0032] Positioning reference signal PRS;

[0033] Synchronization signal block SSB.

[0034] The embodiment of the present invention further provides a method for finding an object based on a tag device, comprising:

[0035] The terminal receives the reporting and measurement configuration information sent by the access network element;

[0036] The terminal receives a reference signal forwarded by the tag device;

[0037] The terminal measures the reference signal according to the reporting and measurement configuration information, and reports a measurement report of the reference signal to the access network element.

[0038] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0039] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0040] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal;

[0041] The sending position of the reference signal is determined by the target identifier.

[0042] The embodiment of the present invention further provides a method for finding an object based on a tag device, comprising:

[0043] The tag device receives a reference signal from an access network element;

[0044] The tag device performs frequency shifting on the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, and the position of the frequency-shifted reference signal is determined by the identifier of the tag device.

[0045] In some embodiments, the method further comprises:

[0046] The tag device receives a second instruction from the access network element, where the second instruction instructs a target tag device to perform frequency shift forwarding on the reference signal, and the second instruction carries a target identifier of the target tag device;

[0047] The tag device frequency-shifts the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, including:

[0048] When the tag device identifies itself as the target identifier, the tag device performs frequency shifting on the reference signal and sends the frequency shifted reference signal to surrounding terminals.

[0049] In some embodiments, the frequency shift forwarding is that the tag device frequency-shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the tag device.

[0050] In some embodiments, the method further comprises:

[0051] The tag device receives a third instruction from the access network element, where the third instruction instructs to stop frequency shifting and forwarding the reference signal.

[0052] In some embodiments, the tag device receiving a reference signal from an access network element includes:

[0053] The tag device determines a sending position of the reference signal and receives the reference signal at the sending position, wherein the sending position of the reference signal in time and / or frequency and / or antenna port is determined by at least one of the following:

[0054] Electronic Product Code (EPC) of the target tag device;

[0055] The identification number of the terminal to which the target tag device belongs;

[0056] The ID of the group to which the target tag device belongs.

[0057] In some embodiments, the reference signal is any one of the following:

[0058] Signals of fixed or variable duration;

[0059] Signals with fixed or variable bandwidth.

[0060] In some embodiments, the reference signal is any one of the following:

[0061] Channel state information reference signal CSI-RS;

[0062] Tracking reference signal TRS;

[0063] Positioning reference signal PRS;

[0064] Synchronization signal block SSB.

[0065] The embodiment of the present invention further provides a device for finding objects based on a tag device, which is applied to an access network element and includes a transceiver and a processor.

[0066] The transceiver is used to receive a first instruction, the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device;

[0067] The processor is used to configure reporting and measurement configuration information for terminals in a preset query area according to the target identifier;

[0068] The transceiver is further configured to send the reporting and measurement configuration information to the terminal; determine a sending position of a reference signal according to the target identifier, and send the reference signal at the sending position; and receive a measurement report of the reference signal reported by the terminal;

[0069] The processor is further configured to determine whether the target tag device exists near the terminal according to the measurement report.

[0070] The embodiment of the present invention further provides a device for finding objects based on a tag device, which is applied to a terminal and includes a transceiver and a processor.

[0071] The transceiver is used to receive the reporting and measurement configuration information sent by the access network element; receive the reference signal forwarded by the tag device;

[0072] The processor is configured to measure the reference signal according to the reporting and measurement configuration information;

[0073] The transceiver is further configured to report a measurement report of the reference signal to the access network element.

[0074] The embodiment of the present invention further provides a device for finding objects based on a tag device, which is applied to the tag device and includes a transceiver and a processor.

[0075] The transceiver is used to receive a reference signal from an access network element; frequency-shift the reference signal, and send the frequency-shifted reference signal to surrounding terminals, wherein the position of the frequency-shifted reference signal is determined by the identifier of the tag device.

[0076] An embodiment of the present invention also provides a tag device-based object finding device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; when the processor executes the program, the tag device-based object finding method as described above is implemented.

[0077] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the object-finding method based on a tag device as described above are implemented.

[0078] The embodiments of the present invention have the following beneficial effects:

[0079] In the above scheme, the access network element sends a reference signal, the tag device receives the reference signal of the access network element, the terminal's reporting and measurement configuration information, and the reference signal sending position are determined by the target identifier, the measurement result of the reference signal measured by the terminal can be used to distinguish the identifier of the tag device, the access network element receives the measurement result of the reference signal fed back by the terminal, and the identifier of the tag device can be distinguished according to the measurement result of the reference signal fed back by the terminal, thereby identifying the target tag device, and realizing the search for the target tag device. This embodiment can achieve the effect of identifying the target tag device without modifying the implementation of the existing terminal, thereby realizing the use of the existing terminal to achieve the purpose of finding objects in the wide area network. BRIEF DESCRIPTION OF THE DRAWINGS

[0080] Figure 1 It is a flowchart of a method for finding an object based on a tag device according to an embodiment of the present invention;

[0081] Figure 2 A schematic diagram of an access network element sending a reference signal according to an embodiment of the present invention;

[0082] Figure 3 This is a schematic diagram of a target tag device performing frequency shift forwarding on a reference signal according to an embodiment of the present invention;

[0083] Figure 4 A schematic diagram of a terminal measuring a reference signal according to an embodiment of the present invention;

[0084] Figure 5 A schematic diagram of a non-target tag device performing frequency shift forwarding on a reference signal according to an embodiment of the present invention;

[0085] Figure 6 A schematic diagram of a terminal measuring a reference signal according to an embodiment of the present invention;

[0086] Figure 7 This is a schematic diagram of the structure of a device for finding an object based on a tag device according to an embodiment of the present invention;

[0087] Figure 8 It is a schematic diagram of the composition of the object-finding device based on the tag device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0088] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention more clear, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0089] The embodiment of the present invention provides a method and apparatus for finding an object based on a tag device, which can achieve the purpose of finding an object in a wide area network by utilizing an existing terminal.

[0090] An embodiment of the present invention provides a method for finding an object based on a tag device, comprising:

[0091] The access network element receives a first instruction, wherein the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device, wherein the first instruction may be sent by a core network element or an application;

[0092] The access network element configures reporting and measurement configuration information for a terminal in a preset query area according to the target identifier, and sends the reporting and measurement configuration information to the terminal. The reporting and measurement configuration information configured by the access network element for the terminal is related to the target identifier. The reporting and measurement configuration information configured for the terminal can be obtained in a predefined manner according to the target identifier. The predefined manner can be a network-side device configuration or a preconfiguration or a protocol definition. The terminal can measure and report the reference signal on the resources indicated by the reporting and measurement configuration information;

[0093] The access network element determines a sending position of a reference signal according to the target identifier, and sends the reference signal at the sending position, where the sending position of the reference signal is obtained in a predefined manner according to the target identifier, and the predefined manner may be a network side device configuration or preconfiguration or protocol definition;

[0094] The access network element receives a measurement report of the reference signal reported by the terminal, and determines whether the target tag device exists near the terminal based on the measurement report; specifically, if the received measurement report meets a preset condition, it is determined that the target tag device exists near the terminal, and the preset condition includes: N consecutive measurement reports from the same terminal indicate that the measurement quality of the reference signal is better than a preset threshold, N is the number of frequency hops, and N is a positive integer.

[0095] The reporting and measurement configuration information configured by the access network element for the terminal and the sending position of the reference signal are obtained in a predefined manner based on the target identifier. The position of the reference signal forwarded by the non-target tag device through frequency shifting does not match the reporting and measurement configuration information configured by the access network element for the terminal. The quality of the reference signal forwarded by the non-target tag device through frequency shifting measured by the terminal will be very poor. The position of the reference signal forwarded by the target tag device through frequency shifting matches the reporting and measurement configuration information configured by the access network element for the terminal. The reference signal forwarded by the target tag device through frequency shifting measured by the terminal has good quality. Therefore, the measurement report of the reference signal reported by the terminal can determine whether the reference signal measured by the terminal is forwarded by the target tag device through frequency shifting, and then determine whether there is a target tag device near the terminal.

[0096] In this embodiment, the access network element sends a reference signal, the tag device receives the reference signal of the access network element, and performs corresponding frequency shift forwarding on the reference signal. The position of the reference signal after the frequency shift is determined by the identifier of the tag device. Therefore, the position of the reference signal after the frequency shift can be used to distinguish the identifier of the tag device. The access network element receives the measurement result of the reference signal fed back by the terminal. The identifier of the tag device can be distinguished according to the measurement result of the reference signal fed back by the terminal, thereby identifying the target tag device and searching for the target tag device. This embodiment can achieve the effect of identifying the target tag device without modifying the implementation of the existing terminal, thereby achieving the purpose of finding objects in the wide area network by using the existing terminal.

[0097] Among them, the frequency shift forwarding is that the target tag device forwards the received signal to a series of frequencies at a series of moments in a predefined manner. The predefined manner is related to the identification of the target tag device. The predefined manner can be a network-side device configuration or preconfiguration or protocol definition. Some simple tag devices are limited by cost, volume and power consumption, and often cannot perform overly complex RF and baseband signal processing. Frequency shifting is highly feasible as a relatively simple and low-power signal processing method.

[0098] In some embodiments, the method further comprises:

[0099] The access network element sends a second instruction to the target tag device, so that the target tag device performs frequency shift forwarding on the reference signal according to the second instruction, and the second instruction carries the target identifier.

[0100] In this embodiment, the access network element may send a second instruction to the target label device, instructing the target label device to perform frequency shifting and forwarding on the reference signal, so that non-target label devices do not need to perform frequency shifting and forwarding on the reference signal; of course, in this embodiment, the access network element may not send the second instruction to the target label device, so that all label devices will perform frequency shifting and forwarding on the reference signal.

[0101] In some embodiments, if the received measurement report does not meet the preset condition, the method further includes:

[0102] Expanding the range of the preset query area. In this embodiment, the preset query area can be pre-defined according to the range of the cell or tracking area. When the target tag device is not found, the range of the preset query area can be expanded to increase the possibility of finding the target tag device.

[0103] In some embodiments, after determining that there is a target tag device near the terminal, the method further includes:

[0104] The access network element sends a third instruction to the target tag device, where the third instruction instructs the target tag device to stop performing frequency shift forwarding on the reference signal, thereby avoiding unnecessary power consumption of the target tag device.

[0105] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0106] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0107] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal.

[0108] In some embodiments, the sending position of the reference signal in time and / or frequency and / or on the antenna port is determined by at least one of the following:

[0109] Electronic Product Code (EPC) of the target tag device;

[0110] The identification number of the terminal to which the target tag device belongs;

[0111] The ID of the group to which the target tag device belongs.

[0112] The target tag device can be uniquely determined through the above information, and the sending position of the reference signal can be made to correspond one-to-one with the target tag device.

[0113] In some embodiments, the reference signal is any one of the following:

[0114] Signals of fixed or variable duration;

[0115] Signals with fixed or variable bandwidth.

[0116] In some embodiments, the reference signal is any one of the following:

[0117] Channel state information reference signal CSI-RS;

[0118] Tracking reference signal TRS;

[0119] Positioning reference signal PRS;

[0120] Synchronization signal block SSB.

[0121] Among them, in the New Radio (NR) system, CSI-RS can start at any symbol of the 14 symbols in a time slot. The flexible time domain configuration of NR allows CSI-RS resources to be sent at the beginning of a time slot and receive CSI feedback at the end of the time slot (depending on the processing capability of the UE). This fast feedback makes the CSI information more accurate (for example, when moving quickly, the channel changes rapidly over time). In the frequency domain, CSI-RS can be mapped to any resource element (RE) position. The ports of NR's CSI-RS are grouped according to the code division multiplexing groups (CDM groups) that support antenna ports. Therefore, the position refers to the position of the first RE of the continuous frequency domain resources occupied by each CDM Group of a CSI-RS.

[0122] NR supports grouping all ports of CSI-RS: CDM Grouping. Each port of each CDM Group occupies the same time-frequency resources, usually containing at least two and continuous REs, and uses orthogonal cover codes (OCC) to distinguish each port. The mapping to time-frequency resources can be flexibly configured. A multi-port CSI-RS can contain multiple CDM Groups, and each CDM Group contains multiple ports, that is: the number of CSI-RS ports = the number of CDM groups * the number of ports contained in each group, such as 32 ports.

[0123] CSI-RS density refers to REs / Port / RB (the number of REs occupied by a port in a RB). The three CSI-RS densities of the Long Term Evolution (LTE) system are 1 / 3, 1 / 2 and 1, and the three CSI-RS densities of NR are 1 / 2, 1 and 3. Among them, 1 / 2 is only used for CSI acquisition, which can reduce the overhead of the pilot signal and transmit CSI-RS only in odd or even physical resource blocks (PRBs).

[0124] In NR, the CSI-RS bandwidth is always configured within the bandwidth part (Bandwidth Part, BWP), which can be configured as the entire BWP bandwidth or a bandwidth smaller than the BWP, but the allocated RBs must be continuous. The base station configures the RB starting position (relative to CRB#0) and the RB number (starting RB, number of RB) through the Radio Resource Control (RRC) to indicate to the terminal (User Equipment, UE).

[0125] The embodiment of the present invention further provides a method for finding an object based on a tag device, comprising:

[0126] The terminal receives the reporting and measurement configuration information sent by the access network element;

[0127] The terminal receives a reference signal forwarded by the tag device;

[0128] The terminal measures the reference signal according to the reporting and measurement configuration information, and reports a measurement report of the reference signal to the access network element.

[0129] The reporting and measurement configuration information configured by the access network element for the terminal and the sending position of the reference signal are obtained in a predefined manner based on the target identifier. The position of the reference signal forwarded by the non-target tag device through frequency shifting does not match the reporting and measurement configuration information configured by the access network element for the terminal. The quality of the reference signal forwarded by the non-target tag device through frequency shifting measured by the terminal will be very poor. The position of the reference signal forwarded by the target tag device through frequency shifting matches the reporting and measurement configuration information configured by the access network element for the terminal. The reference signal forwarded by the target tag device through frequency shifting measured by the terminal has good quality. Therefore, the measurement report of the reference signal reported by the terminal can determine whether the reference signal measured by the terminal is forwarded by the target tag device through frequency shifting, and then determine whether there is a target tag device near the terminal.

[0130] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0131] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0132] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal;

[0133] The sending position of the reference signal is determined by the target identifier.

[0134] The embodiment of the present invention further provides a method for finding an object based on a tag device, comprising:

[0135] The tag device receives a reference signal from an access network element;

[0136] The tag device performs frequency shifting on the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, and the position of the frequency-shifted reference signal is determined by the identifier of the tag device.

[0137] In this embodiment, the position of the frequency-shifted reference signal can be obtained in a predefined manner based on the identification of the tag device. The position of the reference signal forwarded by the non-target tag device through frequency shifting does not match the reporting and measurement configuration information configured by the access network element for the terminal. The quality of the reference signal forwarded by the non-target tag device through frequency shifting measured by the terminal will be very poor. The position of the reference signal forwarded by the target tag device through frequency shifting matches the reporting and measurement configuration information configured by the access network element for the terminal. The quality of the reference signal forwarded by the target tag device through frequency shifting measured by the terminal has better quality.

[0138] In this embodiment, the access network element sends a reference signal, the tag device receives the reference signal of the access network element, and performs corresponding frequency shift forwarding on the reference signal. The position of the reference signal after the frequency shift is determined by the identifier of the tag device. Therefore, the position of the reference signal after the frequency shift can be used to distinguish the identifier of the tag device. The access network element receives the measurement result of the reference signal fed back by the terminal. The identifier of the tag device can be distinguished according to the measurement result of the reference signal fed back by the terminal, thereby identifying the target tag device and searching for the target tag device. This embodiment can achieve the effect of identifying the target tag device without modifying the implementation of the existing terminal, thereby achieving the purpose of finding objects in the wide area network by using the existing terminal.

[0139] Among them, the frequency shift forwarding is that the target tag device forwards the received signal to a series of frequencies at a series of moments in a predefined manner. The predefined manner is related to the identification of the target tag device. The predefined manner can be a network-side device configuration or preconfiguration or protocol definition. Some simple tag devices are limited by cost, volume and power consumption, and often cannot perform overly complex RF and baseband signal processing. Frequency shifting is highly feasible as a relatively simple and low-power signal processing method.

[0140] In some embodiments, the method further comprises:

[0141] The tag device receives a second instruction from the access network element, where the second instruction instructs a target tag device to perform frequency shift forwarding on the reference signal, and the second instruction carries a target identifier of the target tag device;

[0142] The tag device frequency-shifts the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, including:

[0143] When the tag device identifies itself as the target identifier, the tag device performs frequency shifting on the reference signal and sends the frequency shifted reference signal to surrounding terminals.

[0144] In this embodiment, the access network element may send a second instruction to the target label device, instructing the target label device to perform frequency shifting and forwarding on the reference signal, so that non-target label devices do not need to perform frequency shifting and forwarding on the reference signal; of course, in this embodiment, the access network element may not send the second instruction to the target label device, so that all label devices will perform frequency shifting and forwarding on the reference signal.

[0145] In some embodiments, the method further comprises:

[0146] The tag device receives a third instruction from the access network element, and the third instruction instructs to stop frequency-shifting and forwarding the reference signal. After determining that there is a target tag device near the terminal, the access network element can send a third instruction to the tag device, and the third instruction instructs the tag device to stop frequency-shifting and forwarding the reference signal, thereby avoiding unnecessary power consumption of the tag device.

[0147] In some embodiments, the tag device receiving a reference signal from an access network element includes:

[0148] The tag device determines a sending position of the reference signal and receives the reference signal at the sending position, wherein the sending position of the reference signal in time and / or frequency and / or antenna port is determined by at least one of the following:

[0149] Electronic Product Code (EPC) of the target tag device;

[0150] The identification number of the terminal to which the target tag device belongs;

[0151] The ID of the group to which the target tag device belongs.

[0152] The target tag device can be uniquely determined through the above information, and the sending position of the reference signal can be made to correspond one-to-one with the target tag device.

[0153] In some embodiments, the reference signal is any one of the following:

[0154] Signals of fixed or variable duration;

[0155] Signals with fixed or variable bandwidth.

[0156] In some embodiments, the reference signal is any one of the following:

[0157] Channel state information reference signal CSI-RS;

[0158] Tracking reference signal TRS;

[0159] Positioning reference signal PRS;

[0160] Synchronization signal block SSB.

[0161] The technical solution of the present invention is further described below in conjunction with the accompanying drawings. Figure 1 As shown, the object-finding method based on the tag device of this embodiment includes the following steps:

[0162] Step 1: An access network element receives a first instruction, where the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device, wherein the first instruction may be sent by a core network element or an application, and the access network element may specifically be a base station;

[0163] Step 2: The access network element configures reporting and measurement configuration information for the terminals in the preset query area;

[0164] Taking the access network element as a base station as an example, the base station configures CSI measurement and reporting configuration Σ(ID1) for the UE according to the ID1 that needs to be found in the query area S, where Σ(ID1) can be determined in the following manner:

[0165] Method 1: A fixed CSI measurement and reporting location (including time, frequency domain, port, etc.);

[0166] Method 2: Map different ID1s to different measurement resources and reporting locations (including time, frequency domain, port, etc.). For example, in terms of time, with the current UE measuring CSI-RS with a maximum period of 640 slots, if frequency division duplexing (FDD) is considered, there can be N t = 640 resources. Assuming that the frequency hopping scheme is considered, the number of frequency hopping strips is N. strip =4, assuming that CSI-RS is sent in each slot, and the CSI-RS with adjacent intervals of 160-slot are grouped together, then there can be N t = 160 resources. In terms of frequency, the minimum bandwidth occupied by CSI-RS is 24 RB, and there are 273 RBs in a 100 MHz bandwidth, so there can be N in the frequency domain. f = 10 resources. Therefore, there can be N t *N f= 1600 resources are available. The network side can map ID1 to a measurement resource among these resources and configure it to the UE for measurement. The simplest way is to map ID1 to N t *N f =1600 to obtain the remainder, and map ID1 to one of the measurement resources according to the remainder.

[0167] Step 3: The access network element sends a second instruction to the target tag device, so that the target tag device performs frequency shift forwarding on the reference signal according to the second instruction, and the second instruction carries the target identifier;

[0168] This step is optional and can be performed or not.

[0169] Step 4: The access network element determines a sending position of a reference signal according to the target identifier, and sends the reference signal at the sending position. The sending position of the reference signal is obtained in a predefined manner according to the target identifier. The predefined manner may be a network side device configuration or a preconfiguration or a protocol definition.

[0170] Taking the access network element as a base station as an example, the base station determines the sending position Ω(ID1) of the base station reference signal according to the ID1 of the tag to be found (that is, the target tag device, Tag), and sends the corresponding reference signal (such as CSI-RS). The base station can send reference signals (which can be reference signals such as CSI-RS) at different times according to a certain frequency domain pattern. The base station can send reference signals (such as CSI-RS) at a set of times (T1, T2, T3, T4, ... T Nstrip ) sends CSI-RS reference signals, and the positions of these CSI-RS in the frequency domain are (f1, f2, ... f Nstrip ). Where N strip is the number of frequency hopping.

[0171] ((f1,f2,…f n ) corresponds to a unique identifier of a set of tags to be found. This unique identifier may correspond to:

[0172] The EPC number of the tag;

[0173] The ID number of the UE to which the Tag belongs (such as IMEI, IMSI, etc.);

[0174] The number of the group to which the tag belongs, etc.

[0175] In a specific example, f in Ω(ID1) iIt can take {1,2,3,4,5…10} values ​​(corresponding to the minimum bandwidth occupied by CSI-RS is 24RB, 100MHz bandwidth has 273RB, so the frequency domain can have N f = 10 resources), the EPC number and time position T i Combine them into a Hash code, that is, Hash (EPC number, T i )->A number in {1,2,3,4,5…10}, that is, at a certain time position T i After that, we can use the time position T i Do Hash coding to determine the f corresponding to the time position Ti i .

[0176] Step 5: The tag device performs frequency shifting on the received reference signal and sends the frequency shifted reference signal to surrounding terminals;

[0177] The tag performs a corresponding frequency shift operation Ψ(ID) according to its own ID and forwards the reference signal S to potential UEs in the vicinity.

[0178] Tag at time (T1, T2, T3, T4, ... T n ) respectively place the frequency domain positions at (f1,f2,…f n ) to perform frequency shift operation on the reference signal S. First, determine the subband position (f1, f2, ... f) of the reference signal S to be shifted. n ), can be determined based on Ω(ID) in step 4.

[0179] Secondly, the target subband position f0 of the moved reference signal S is determined, which can be determined according to Σ(ID) in step 2. Generally speaking, the moved reference signal position is a fixed subband position f0 at different times in order to ensure that the implementation of the existing terminal does not change, because the existing terminal can only measure at a fixed subband position when performing CSI-RS measurement.

[0180] The signal S may be a signal of fixed time length or variable time length; it may also be a signal of fixed bandwidth or variable bandwidth. (f1,f2,…f n ) corresponds to a unique identifier of a set of tags to be found.

[0181] Step 6: The terminal measures the reference signal according to the reporting and measurement configuration information, and reports the measurement report of the reference signal to the access network element;

[0182] The terminal reports the CSI measurement result according to the measurement configuration Σ(ID1). The terminal measures the CSI-RS in subband B determined according to Σ(ID1) configured by the base station, and reports the measurement result to the base station in a timely manner. The measured subband B is related to the position of the CSI-RS after the frequency shift to f0 in step 2. Subband B contains the time-frequency position of the transmission of the frequency-shifted CSI-RS.

[0183] like Figure 2 As shown, the access network element sends a reference signal; Figure 3 As shown, if the tag is correct, that is, the target tag device, the reference signal can be correctly moved to the target subband ( Figure 3 as shown in the rectangular box in the figure); Figure 4 As shown, the terminal can correctly detect and report the measurement quality of the reference signal.

[0184] like Figure 5 As shown in Figure 1, the wrong tag, that is, the non-target tag device, cannot completely move the reference signal to the target subband ( Figure 5 as shown in the rectangular box in the figure); Figure 6 As shown, the terminal cannot correctly detect and report the measurement quality of the reference signal, and the measurement quality reported by the terminal is very poor.

[0185] Step 7: The access network element receives the reference signal measurement report reported by the terminal, and determines whether there is a target tag device near the terminal according to the measurement report.

[0186] Taking the access network element as a base station as an example, the base station determines whether ID1 is around a certain UE based on the CSI measurement results reported by multiple UEs, where:

[0187] (1) If the tag corresponding to ID1 is found near a UE, the network is informed of the search result.

[0188] (2) If the tag corresponding to ID1 is not found near a certain UE, the search range is expanded until the target tag is found and then the network is informed.

[0189] Specifically, the base station can identify whether the tag corresponding to ID1 is near a certain UE according to the CSI measurement result fed back by the UE. For example, the base station receives N consecutive strip If the quality of the CSI report is good, it can be considered that the tag to be found (corresponding to ID1) exists around the UE;

[0190] Good quality means that: a measurement result of a reference signal received by the terminal is higher than a received level (Reference Signal Received Power, reference signal received power), or a measurement result of a reference signal received by the terminal is higher than a signal-to-noise and interference ratio (signal-to-noise and interference ratio, SINR) or a reference signal received quality (Reference Signal Received Quality, RSRQ), or a measurement result of a reference signal received by the terminal is higher than a modulation and coding scheme (Modulation and coding scheme, MCS) and / or a channel quality indicator (CQI) level;

[0191] Optionally, the base station infers the location of the Tag according to the location of the UE.

[0192] Step 8: The access network element sends a third instruction to the target tag device, where the third instruction instructs the target tag device to stop frequency shifting and forwarding the reference signal, thereby avoiding unnecessary power consumption of the target tag device.

[0193] This step is optional and can be performed or not.

[0194] In addition, in order to implement the above process, so that the base station can uniquely and correctly find the tag, and the reference signal forwarded by the tag can be measured by the surrounding UEs and fed back to the base station, some additional restrictions are required, such as:

[0195] In an area (cell or TA area), the tag can be represented by a unique set of frequency hopping sequences (f1, f2, ... f n ) is determined; the base station sends the CSI-RS signal at the corresponding position according to the frequency hopping sequence corresponding to the tag to be found; only the CSI-RS signal reflected by this tag can fall within the same subband (24RB) and be detected by nearby UEs and reported to the base station.

[0196] This embodiment uses the existing terminal (without changing the implementation of the existing terminal) to achieve the purpose of searching for objects in the wide area network, and has the following advantages:

[0197] More terminals: The existing terminals under the operator's network are large in number and widely distributed, which can widely help locate the target tag devices;

[0198] Lower standby time: Using the operator network signal to send signals on demand, and the tag device then forwards the signals, which can effectively reduce the power consumption of the tag device, and it is expected to achieve a working time of 10 years or even longer;

[0199] Low cost: The tag device is designed according to the requirements of frequency shift amplification. The tag device only needs simple baseband processing and universal batteries, which can have a low cost.

[0200] Small size: The tag device only needs a simple baseband processor and a universal battery. The tag device has a small size and can be carried more widely on various objects.

[0201] The embodiment of the present invention also provides a device for finding objects based on a tag device, which is applied to an access network element, such as Figure 7 As shown, it includes a transceiver 21 and a processor 22,

[0202] The transceiver 21 is used to receive a first instruction, the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device;

[0203] The processor 22 is used to configure reporting and measurement configuration information for terminals in a preset query area according to the target identifier;

[0204] The transceiver 21 is further configured to send the reporting and measurement configuration information to the terminal; determine a sending position of a reference signal according to the target identifier, and send the reference signal at the sending position; and receive a measurement report of the reference signal reported by the terminal;

[0205] The processor 22 is further configured to determine whether the target tag device exists near the terminal according to the measurement report.

[0206] In some embodiments, the transceiver 21 is further configured to send a second instruction to the target tag device so that the target tag device performs frequency shift forwarding on the reference signal according to the second instruction, and the second instruction carries the target identifier.

[0207] The frequency shift forwarding is that the target tag device frequency shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the target tag device.

[0208] In some embodiments, the processor 22 is used to determine that the target tag device exists near the terminal if the received measurement report meets a preset condition, and the preset condition includes: N consecutive measurement reports from the same terminal indicate that the measurement quality of the reference signal is better than a preset threshold, N is the number of frequency hops, and N is a positive integer.

[0209] In some embodiments, if the received measurement report does not satisfy the preset condition, the processor 22 is further configured to expand the range of the preset query area.

[0210] In some embodiments, the transceiver 21 is further configured to send a third instruction to the target tag device, wherein the third instruction instructs the target tag device to stop performing frequency shift forwarding on the reference signal.

[0211] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0212] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0213] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal.

[0214] In some embodiments, the sending position of the reference signal in time and / or frequency and / or on the antenna port is determined by at least one of the following:

[0215] Electronic Product Code (EPC) of the target tag device;

[0216] The identification number of the terminal to which the target tag device belongs;

[0217] The ID of the group to which the target label device belongs.

[0218] In some embodiments, the reference signal is any one of the following:

[0219] Signals of fixed or variable duration;

[0220] Signals with fixed or variable bandwidth.

[0221] In some embodiments, the reference signal is any one of the following:

[0222] Channel state information reference signal CSI-RS;

[0223] Tracking reference signal TRS;

[0224] Positioning reference signal PRS;

[0225] Synchronization signal block SSB.

[0226] The embodiment of the present invention also provides a device for finding objects based on a tag device, which is applied to a terminal, such as Figure 7 As shown, it includes a transceiver 21 and a processor 22,

[0227] The transceiver 21 is used to receive the reporting and measurement configuration information sent by the access network element; receive the reference signal forwarded by the tag device;

[0228] The processor 22 is configured to measure the reference signal according to the reporting and measurement configuration information;

[0229] The transceiver 21 is further configured to report the measurement report of the reference signal to the access network element.

[0230] In some embodiments, the reporting and measurement configuration information indicates any of the following:

[0231] The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol;

[0232] For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal;

[0233] The sending position of the reference signal is determined by the target identifier.

[0234] The embodiment of the present invention also provides a device for finding objects based on a tag device, which is applied to a tag device, such as Figure 7 As shown, it includes a transceiver 21 and a processor 22,

[0235] The transceiver 21 is used to receive a reference signal from an access network element; frequency-shift the reference signal, and send the frequency-shifted reference signal to surrounding terminals. The position of the frequency-shifted reference signal is determined by the identifier of the tag device.

[0236] In some embodiments, the transceiver 21 is specifically used to receive a second instruction from the access network element, the second instruction instructs the target tag device to frequency-shift and forward the reference signal, and the second instruction carries the target identifier of the target tag device; when its own identifier is the target identifier, the reference signal is frequency-shifted, and the frequency-shifted reference signal is sent to surrounding terminals.

[0237] The frequency shift forwarding is that the tag device frequency shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the tag device.

[0238] In some embodiments, the transceiver 21 is further configured to receive a third instruction from the access network element, wherein the third instruction instructs to stop frequency shifting and forwarding the reference signal.

[0239] In some embodiments, the transceiver 21 is used to determine a sending position of the reference signal and receive the reference signal at the sending position, and the sending position of the reference signal in time and / or frequency and / or on the antenna port is determined by at least one of the following:

[0240] Electronic Product Code (EPC) of the target tag device;

[0241] The identification number of the terminal to which the target tag device belongs;

[0242] The ID of the group to which the target tag device belongs.

[0243] In some embodiments, the reference signal is any one of the following:

[0244] Signals of fixed or variable duration;

[0245] Signals with fixed or variable bandwidth.

[0246] In some embodiments, the reference signal is any one of the following:

[0247] Channel state information reference signal CSI-RS;

[0248] Tracking reference signal TRS;

[0249] Positioning reference signal PRS;

[0250] Synchronization signal block SSB.

[0251] The embodiment of the present invention also provides a device for finding objects based on a tag device, such as Figure 8 As shown, it includes a memory 31, a processor 32, and a computer program stored in the memory 31 and executable on the processor 32; when the processor 32 executes the program, the method for finding objects based on the tag device as described above is implemented. When the device for finding objects based on the tag device is applied to an access network element, the method for finding objects based on the tag device on the access network element side as described above is implemented; when the device for finding objects based on the tag device is applied to a tag device, the method for finding objects based on the tag device on the tag device side as described above is implemented; when the device for finding objects based on the tag device is applied to a terminal, the method for finding objects based on the tag device on the terminal side as described above is implemented.

[0252] An embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the steps in the object-finding method based on a tag device as described above are implemented.

[0253] Computer readable media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage terminal devices to be detected or any other non-transmission media that can be used to store information that can be accessed by the computer terminal device to be detected. As defined in this article, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carriers.

[0254] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for finding objects based on a tag device, characterized in that: include: The access network element receives a first instruction, wherein the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device; The access network element configures reporting and measurement configuration information for a terminal in a preset query area according to the target identifier, and sends the reporting and measurement configuration information to the terminal; The access network element determines a sending position of a reference signal according to the target identifier, and sends the reference signal at the sending position; The access network element receives a measurement report of the reference signal reported by the terminal, and determines whether the target tag device exists near the terminal according to the measurement report.

2. The object-finding method based on a tag device according to claim 1, characterized in that: The method further comprises: The access network element sends a second instruction to the target tag device, so that the target tag device performs frequency shift forwarding on the reference signal according to the second instruction, and the second instruction carries the target identifier.

3. The object-finding method based on a tag device according to claim 2, characterized in that: The frequency shift forwarding is that the target tag device frequency shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the target tag device.

4. The object-finding method based on a tag device according to claim 1, characterized in that: The determining, according to the measurement report, whether the target tag device exists near the terminal comprises: If the received measurement report meets the preset conditions, it is determined that the target tag device exists near the terminal, and the preset conditions include: N consecutive measurement reports from the same terminal indicate that the measurement quality of the reference signal is better than a preset threshold, N is the number of frequency hopping, and N is a positive integer.

5. The object-finding method based on a tag device according to claim 4, characterized in that: If the received measurement report does not meet the preset condition, the method further includes: Expand the scope of the preset query area.

6. The object-finding method based on a tag device according to claim 3, characterized in that: After determining that there is a target tag device near the terminal, the method further includes: The access network element sends a third instruction to the target tag device, where the third instruction instructs the target tag device to stop performing frequency shift forwarding on the reference signal.

7. The object-finding method based on a tag device according to claim 1, characterized in that: The reporting and measurement configuration information indicates any of the following: The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol; For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal.

8. The object-finding method based on a tag device according to claim 1, characterized in that: The sending position of the reference signal in time and / or frequency and / or on the antenna port is determined by at least one of the following: Electronic Product Code (EPC) of the target tag device; The identification number of the terminal to which the target tag device belongs; The ID of the group to which the target label device belongs.

9. The object-finding method based on a tag device according to any one of claims 1 to 8, characterized in that: The reference signal is any one of the following: Signals of fixed or variable duration; Signals with fixed or variable bandwidth.

10. The object-finding method based on a tag device according to claim 9, characterized in that: The reference signal is any one of the following: Channel state information reference signal CSI-RS; Tracking reference signal TRS; Positioning reference signal PRS; Synchronization signal block SSB.

11. A method for finding objects based on a tag device, characterized in that: include: The terminal receives the reporting and measurement configuration information sent by the access network element; The terminal receives a reference signal forwarded by the tag device; The terminal measures the reference signal according to the reporting and measurement configuration information, and reports a measurement report of the reference signal to the access network element.

12. The object-finding method based on a tag device according to claim 11, characterized in that: The reporting and measurement configuration information indicates any of the following: The terminal measures the reference signal on a fixed resource and reports a measurement report of the reference signal, where the fixed resource is configured by the network side or agreed upon by a protocol; For different target identifiers, the terminal measures the reference signal on different resources and reports a measurement report of the reference signal; The sending position of the reference signal is determined by the target identifier.

13. A method for finding objects based on a tag device, characterized in that: include: The tag device receives a reference signal from an access network element; The tag device performs frequency shifting on the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, and the position of the frequency-shifted reference signal is determined by the identifier of the tag device.

14. The object-finding method based on a tag device according to claim 13, characterized in that: The method further comprises: The tag device receives a second instruction from the access network element, where the second instruction instructs a target tag device to perform frequency shift forwarding on the reference signal, and the second instruction carries a target identifier of the target tag device; The tag device frequency-shifts the reference signal, and sends the frequency-shifted reference signal to surrounding terminals, including: When the tag device identifies itself as the target identifier, the tag device performs frequency shifting on the reference signal and sends the frequency shifted reference signal to surrounding terminals.

15. The object-finding method based on a tag device according to claim 14, characterized in that: The frequency shift forwarding is that the tag device frequency shifts and forwards the received signal to a series of frequencies at a series of time points in a predefined manner, and the predefined manner is related to the identification of the tag device.

16. The object-finding method based on a tag device according to claim 13, characterized in that: The method further comprises: The tag device receives a third instruction from the access network element, where the third instruction instructs to stop frequency shifting and forwarding the reference signal.

17. The object-finding method based on a tag device according to claim 13, characterized in that: The tag device receiving a reference signal of an access network element includes: The tag device determines a sending position of the reference signal and receives the reference signal at the sending position, wherein the sending position of the reference signal in time and / or frequency and / or antenna port is determined by at least one of the following: Electronic Product Code (EPC) of the target tag device; The identification number of the terminal to which the target tag device belongs; The ID of the group to which the target label device belongs.

18. The object-finding method based on a tag device according to any one of claims 13 to 17, characterized in that: The reference signal is any one of the following: Signals of fixed or variable duration; Signals with fixed or variable bandwidth.

19. The object-finding method based on a tag device according to claim 18, characterized in that: The reference signal is any one of the following: Channel state information reference signal CSI-RS; Tracking reference signal TRS; Positioning reference signal PRS; Synchronization signal block SSB.

20. A device for finding objects based on a tag device, characterized in that: Applied to access network elements, including transceivers and processors, The transceiver is used to receive a first instruction, the first instruction instructs to find a target tag device, and the first instruction carries a target identifier of the target tag device; The processor is used to configure reporting and measurement configuration information for terminals in a preset query area according to the target identifier; The transceiver is further configured to send the reporting and measurement configuration information to the terminal; determine a sending position of a reference signal according to the target identifier, and send the reference signal at the sending position; and receive a measurement report of the reference signal reported by the terminal; The processor is further configured to determine whether the target tag device exists near the terminal according to the measurement report.

21. A device for finding objects based on a tag device, characterized in that: Applied to terminals, including transceivers and processors, The transceiver is used to receive the reporting and measurement configuration information sent by the access network element; receive the reference signal forwarded by the tag device; The processor is configured to measure the reference signal according to the reporting and measurement configuration information; The transceiver is further configured to report a measurement report of the reference signal to the access network element.

22. A device for finding objects based on a tag device, characterized in that: Applied to tag devices, including transceivers and processors, The transceiver is used to receive a reference signal from an access network element; frequency-shift the reference signal, and send the frequency-shifted reference signal to surrounding terminals, wherein the position of the frequency-shifted reference signal is determined by the identifier of the tag device.

23. A device for finding objects based on a tag device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor; characterized in that: When the processor executes the program, the object-finding method based on a tag device as described in any one of claims 1 to 19 is implemented.

24. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps in the object-finding method based on a tag device as described in any one of claims 1 to 19 are implemented.

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