Passive tag-based cross-regional logistics tracking method and system

Abstract

The invention relates to a cross-regional logistics tracking method and system based on passive tags, each transport vehicle is equipped with a wireless terminal, and the method comprises the following steps: a console pages the wireless terminals on the transport vehicles in a certain period; the wireless terminal on the transport vehicle receives the paging, determines the real-time position of the wireless terminal, and reports the real-time position to a console; and the console generates a vehicle trajectory diagram according to the feedback of the wireless terminal, compares the vehicle trajectory diagram with historical data, and determines whether the state of the transport vehicle is abnormal according to a comparison result. The invention relates to the technical field of passive Internet of Things, and can track and monitor commodities in a cross-regional logistics scene.

Description

Technical Field

[0001] The present invention relates to a cross-regional logistics tracking method and system based on passive tags, and relates to the technical field of passive Internet of Things. Background Art

[0002] By attaching passive tags to goods, the goods can be located, checked and managed through the interaction between the reader and the passive tags, which greatly reduces the burden of manual inventory of goods and realizes the automated management of goods.

[0003] Currently, cellular passive IoT tags are divided into three categories: Class A tags, Class B tags, and Class C tags, among which:

[0004] 1. Class A tag (also known as type 1 or Device 1): ~1W peak power consumption, with energy storage capability, initial sampling frequency offset (SFO) up to 10Xppm, and neither DL nor UL amplification. The device's UL transmissions are backscattered on an externally provided carrier.

[0005] 2. Class B tags (also known as type 2-A or Device 2a): Peak power consumption ≤ several hundred W, with energy storage function, initial sampling frequency offset (SFO) up to 10X ppm, and DL and / or UL amplification function. The UL transmission of this device is backscattered on an externally provided carrier.

[0006] 3. Class C tags (also known as type 2-B or Device 2b): Peak power consumption ≤ several hundred W, with energy storage function, initial sampling frequency offset (SFO) up to 10X ppm, and DL and / or UL amplification function. The device's UL transmission is generated internally.

[0007] Patent application CN 116468231A (Application Number: 202310359957.4, Invention Title: A Method, Device, Intelligent Terminal, and Storage Medium for Determining Freight Transport Anomalies, Application Date: March 31, 2023, Applicant: Shenzhen Meikai Innovation Technology Co., Ltd.) discloses a method, device, intelligent terminal, and storage medium for determining freight transport anomalies, comprising: a wireless device installed on a transport vehicle emits a radio frequency signal; a passive freight tag within the radiation range of the radio frequency signal is powered on when activated by the radio frequency signal, the passive freight tag being installed on the freight loaded on the transport vehicle; after being powered on, the passive freight tag transmits first freight information to a target terminal; the target terminal receives the first freight information, compares the first freight information with pre-stored second freight information, and determines whether the freight transport is abnormal based on the comparison result. Through the above method, automatic inventory of freight and inspection for freight anomalies are achieved during transportation, eliminating the need for manual inspection of freight by transport personnel, improving freight inspection efficiency, and avoiding the occurrence of freight loss. This technical solution involves a wireless device (i.e., a reader) inside the truck activating a passive tag (i.e., a Class A passive tag). Once activated, the passive tag transmits cargo information to a target terminal inside the truck, which then determines whether the cargo is abnormal. This technical solution operates only within the truck and can only determine whether cargo has fallen out of the truck. It does not involve tracking a moving truck, let alone cargo that has fallen out of the truck.

[0008] Since the reader's operating range is limited to a certain distance, it is impossible to track and monitor goods in cross-regional logistics scenarios. Therefore, how to track and monitor goods in cross-regional logistics scenarios has become a key technical issue for technical personnel. Summary of the Invention

[0009] In view of this, the purpose of the present invention is to provide a cross-regional logistics tracking method and system based on passive tags, which can track and monitor goods in cross-regional logistics scenarios.

[0010] In order to achieve the above objectives, the present invention provides a cross-regional logistics tracking method based on passive tags, wherein each transport vehicle is equipped with a wireless terminal, including:

[0011] Step 1: The control console pages the wireless terminal on the transport vehicle at a certain period;

[0012] Step 2: The wireless terminal on the transport vehicle receives the paging, determines its real-time location, and reports the real-time location to the control console;

[0013] Step 3: The console generates a vehicle trajectory map based on the feedback from the wireless terminal, compares it with historical data, and determines whether the transport vehicle status is abnormal based on the comparison results.

[0014] In order to achieve the above-mentioned purpose, the present invention also provides a cross-regional logistics tracking system based on passive tags, in which each transport vehicle is equipped with a wireless terminal, including:

[0015] The control console pages the wireless terminal on the transport vehicle at a certain period, and then generates a vehicle trajectory map based on the feedback from the wireless terminal. It compares the map with historical data to determine whether the transport vehicle status is abnormal based on the comparison results;

[0016] The wireless terminal receives the paging message from the control console, determines its own real-time location, and reports the real-time location to the control console.

[0017] In order to achieve the above object, the present invention further provides a computing device, comprising:

[0018] memory and processor;

[0019] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the cross-regional logistics tracking method based on passive tags are implemented.

[0020] In order to achieve the above-mentioned object, the present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the cross-regional logistics tracking method based on passive tags.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the present invention effectively solves the problem of tracking and managing goods in cross-regional logistics scenarios. By using 5G mobile phones as group managers, the real-time location of passive tags can be sent to the base station, and the base station forwards it to the control server (i.e., the console) through the 5G core network, thereby realizing the monitoring and tracking of trucks and passive tags; the present invention realizes differentiated monitoring and management based on the value of goods by introducing Class C passive tags. When there is no 5G terminal around the Class C tag, the Class C passive tag is used as a group manager to realize the supervision of high-value goods. Even if there is no 5G terminal around the passive tag, the location information can still be reported to the console; when there are multiple Class C tags in the same area The present invention can also select only one Class C tag as the group manager according to the power-saving strategy, thereby ensuring the monitoring of passive tags while saving the power of passive tags to the greatest extent; the present invention also realizes the grouping and management of goods according to the status of goods (in the warehouse, during cross-regional logistics, in the store) by performing three-level identification on the tags (group identification | category identification | product serial number identification). It can also be applied in warehouses and stores, and by analyzing the time periods of the day, the quantity of goods, the type of goods or the shelf life of goods, it can achieve accurate and efficient guidance on the type, quantity, speed, etc. of purchases. By comparing with historical data, it can issue warnings when anomalies occur and when the quantity of goods is abnormal, so as to realize intelligent supervision of goods. The present invention can also be used during cross-regional logistics when the transportation When the transport vehicle is in an abnormal state (for example, the position deviates from the safe area, the vehicle is traveling too fast / too slow / detained for a timeout / fails to arrive at the designated location within the specified time) or when the passive tag is in an abnormal state (for example, lost), different levels of warnings are issued. When the transport vehicle and the passive tag return to normal, the warning level is lowered or the warning is lifted according to the situation, thereby realizing graded warning and graded lifting of warnings according to the severity of the loss. When there are 5G mobile phones in the same area, the present invention uses the 5G mobile phone as the group manager. When there are no 5G mobile phones in the same area but there are multiple Class C terminals, a Class C terminal can be used as the group manager according to the power saving strategy, and the group can be split and merged according to the position change of the passive tag, thereby realizing graded warning and graded lifting of warnings. Flexible and targeted group management determines the number of groups that need to be established based on the number of abnormal areas and the number of Class C terminals in the area. The more abnormal areas there are, the larger the number of groups that need to be established, and the fewer abnormal areas there are, the fewer the number of groups that need to be established. This enables group splitting based on the occurrence of abnormalities and group merging based on the recovery of abnormalities, ultimately achieving efficient and targeted supervision of passive tags. The present invention also flexibly determines group managers (elects group managers, adds group managers, deletes group managers) for different situations, and achieves tracking and early warning of Class C tags and Class A tags in warehouses, stores, normal trucks, abnormal trucks, trucks, and Class C tags and Class A tags that have fallen out of trucks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is a flow chart of a cross-regional logistics tracking method based on passive tags, which is shown as an exemplary embodiment of the present invention.

[0023] Figure 2 This is a specific flowchart of an exemplary embodiment of the present invention showing that when there is no 5G terminal around the C-type tag, the C-type tag is used as a group manager to report location information to the console.

[0024] Figure 3 This is a specific flow chart showing an exemplary embodiment of the present invention, when multiple Class C tags exist in the same area, selecting a Class C tag as a group manager to report location information to a console.

[0025] Figure 4 The figure is a schematic structural diagram of a cross-regional logistics tracking system based on passive tags, showing an exemplary embodiment of the present invention.

[0026] Figure 5 It is a structural diagram of a computer device according to an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings.

[0028] The present invention can use Class A and Class C tags to manage the entry of goods into the warehouse, cross-regional logistics, etc. When goods enter the warehouse, all incoming goods are added to a warehouse group (one warehouse corresponds to one warehouse group), and a label identifier is configured for each product. For example, goods of ordinary value can be affixed with a Class A label, and more expensive goods can be affixed with a Class C label. The label identification can be as follows: XXX (group identifier) | YYYYYYY (product category) | ZZZZ (product serial number). When goods are shipped out of the warehouse, the shipped goods are deleted from the warehouse group and added to the outlier group of the transport vehicle transporting the goods (one truck corresponds to one outlier group). That is, the group identifier field of the label identifier on the goods is modified to the outlier group identifier to which it belongs. At the same time, 5G mobile phone wireless terminals are used as group managers of all passive tags to manage tag groups in the same location area (for example, in the same warehouse, in the same store, or on the same truck). The real-time location of the passive tags is sent to the base station, which then forwards it to the control server (i.e., the console) through the 5G core network, thereby realizing the monitoring and tracking of transport vehicles and passive tags.

[0029] like Figure 1As shown, the present invention proposes a cross-regional logistics tracking method based on passive tags. Each transport vehicle is equipped with a wireless terminal, which is used to manage all tags on the transport vehicle, including:

[0030] Step 1: The control console pages the wireless terminal on the transport vehicle at a certain period;

[0031] The cycle is set according to the transport monitoring level of the transport vehicle;

[0032] Step 2: The wireless terminal on the transport vehicle receives the paging, determines its real-time location, and reports the real-time location to the control console;

[0033] Step 3: The console generates a vehicle trajectory map based on the feedback from the wireless terminal, compares it with historical data, and determines whether the transport vehicle status is abnormal based on the comparison results.

[0034] In step three, the vehicle trajectory map is compared with historical data. If the comparison result shows that the vehicle position deviates from the safe area, travels too fast / too slow / stays for a certain period of time, or fails to arrive at the designated location at the designated time, the transport vehicle status is determined to be abnormal.

[0035] When a transport vehicle's status is determined to be abnormal, the transport monitoring level is raised and an alert is issued. The system then continues to page the wireless terminal on the transport vehicle at a period corresponding to the transport monitoring level. When the transport vehicle's status is determined to be normal, the transport monitoring level is lowered and the alert is lifted. The transport monitoring levels may further include a normal transport monitoring level and an emergency transport monitoring level. The transport vehicle's status may be initially set to the normal transport monitoring level and then upgraded to the emergency transport monitoring level when an abnormality is determined.

[0036] The present invention can also set Class A tags and Class C tags on the goods loaded on the transport vehicle, and monitor the goods through Class A tags and Class C tags. Step 2 includes:

[0037] The wireless terminal on the transport vehicle receives the paging, determines its own real-time location, and searches for the surrounding Class A and Class C tags. After receiving the response from the Class A and Class C tags, it reports the real-time location and the surrounding Class A and Class C tag information to the console.

[0038] By introducing Class C tags, the present invention can also monitor and manage goods based on their value. When there are no wireless terminals around a Class C tag, the Class C tag can be used as a group manager to monitor high-value goods, with the Class C tag reporting its location information to the control console. Figure 2 The figure shows a specific flow chart of using the C-type tag as a group manager to report location information to the console when there is no 5G terminal around the C-type tag. Figure 2As shown, step three may also include:

[0039] Step A1: The console compares the Class A and Class C tag information reported by the wireless terminal with the pre-stored tag information, and determines whether the Class A and Class C tags are lost (i.e., have left the truck) based on the comparison results. The console then adds the lost Class A and Class C tags to a lost tag list and determines whether the Class C tag exists in the lost tag list. If so, it indicates that only the Class C tag is lost, or both the Class C and Class A tags are lost, and an alarm is issued: "Class C tag is lost," and the process proceeds to the next step. If not, an alarm is issued: "Class A tag is lost," and the process ends.

[0040] Step A2: The console sends an activation message containing all Class C tag IDs in the lost tag list to activate the remote sending and receiving function of the Class C tags;

[0041] Step A3: The console pages all Class C tags in the lost tag list at a certain period;

[0042] Step A4: After receiving the paging call from the control station, the paged Class C tag determines its real-time location and searches for surrounding tags. After receiving responses from surrounding tags, it reports its real-time location and the surrounding tag information to the control station.

[0043] Step A5: The console generates a trajectory map for each Class C tag based on the reported information from the Class C tags, and compares each Class C tag trajectory map with the vehicle trajectory map of the transport vehicle to determine whether each Class C tag has been aggregated to the transport vehicle. The console then sends a deactivation message to the Class C tags that have been aggregated to the transport vehicle to deactivate their remote transceiver capabilities, and deletes the Class C tag and its surrounding Class A tags from the lost tag list.

[0044] Step A6: The console determines whether there are still Class C tags in the lost tag list. If so, go to step A3; if not, cancel the Class C tag loss alarm and end paging. If there are still Class A tags in the lost tag list, issue an alarm: "Lost Class A tags". If there are no Class A tags in the lost tag list, also cancel the Class A tag loss alarm.

[0045] When there are multiple Class C tags in the same area, the present invention can also select only one Class C tag as a group manager according to the power saving strategy, thereby saving the power of the passive tags to the greatest extent while ensuring the monitoring of the passive tags. Figure 3 The figure shows a specific flow chart of selecting a Class C tag as a group manager to report location information to the console when there are multiple Class C tags in the same area. Figure 3 As shown, step three may also include:

[0046] Step B1: The console compares the Class A and Class C tag information reported by the wireless terminal with the pre-stored tag information, and determines whether the Class A and Class C tags are lost (i.e., have left the truck) based on the comparison results. The console then adds the lost Class A and Class C tags to a lost tag list, and then determines whether the Class C tag exists in the lost tag list. If so, it indicates that only the Class C tag is lost, or both the Class C tag and the Class A tag are lost, and an alarm is issued: "Class C tag is lost," and the process proceeds to the next step. If not, an alarm is issued: "Class A tag is lost," and this process ends.

[0047] Step B2: The console sends an activation message containing the IDs of all Class C tags in the lost tag list to activate the remote sending and receiving function of the Class C tags. The activated Class C tags automatically become group owners and managers.

[0048] Step B3: The console periodically pages all group owner and administrator C-type tags in the lost tag list;

[0049] Step B4: The paged group owner / administrator's C-type tag determines its own real-time location and searches for surrounding tags. After receiving responses from surrounding tags, it reports the real-time location and surrounding response tag information to the console.

[0050] Step B5: The console determines whether there are multiple group owner / manager C-type tags in the same area based on the reported information from all group owner / manager C-type tags. If so, the console selects one of the C-type tags in the same area as the group owner / manager of the area based on the remaining power of the C-type tags. The console sends a deactivation message to the other group owner / manager C-type tags in the area to deactivate the remote transmission and reception capabilities of the other C-type tags, and then proceeds to the next step. If not, the console proceeds to the next step.

[0051] Step B6: The console generates a trajectory map of each group owner / manager C-type tag based on the reported information of the group owner / manager C-type tag, and compares the trajectory map of each group owner / manager C-type tag with the vehicle trajectory map of the transport vehicle to determine whether each group owner / manager C-type tag has been aggregated into the transport vehicle. The console then sends a deactivation message to the group owner / manager C-type tag that has been aggregated into the transport vehicle to deactivate its remote transceiver capability, and simultaneously deletes the group owner / manager C-type tag and its surrounding corresponding A-type and C-type tags from the lost tag list.

[0052] Step B7: The console determines whether there is still a Class C tag for the group owner manager in the lost tag list. If so, go to step B3; if not, cancel the Class C tag loss alarm and end the paging of the Class C tag. If there is still a Class A tag in the lost tag list, continue to issue the alarm: "Lost Class A tag". If there is no Class A tag in the lost tag list, cancel the Class A tag loss alarm.

[0053] Step B5 may further include:

[0054] Based on the received power, the console calculates the power of each group owner manager's C-class tag and determines whether its power is lower than the preset minimum power. If so, it selects a new group owner manager from other C-class tags in the area where the group owner manager's C-class tag belongs, sends a deactivation message to the original group owner manager's C-class tag, and sends an activation message to the new group owner manager's C-class tag. The activated C-class tag automatically becomes the group owner manager.

[0055] Between steps B5 and B6, the following may also be included:

[0056] The console compares the C-type tag information of the surrounding responses reported by the group owner manager's C-type tag with the historical reported information, and determines based on the comparison results whether the C-type tags of the surrounding responses are lost (i.e., they have left the detection range of the group manager's C-type tag). If so, an activation message is sent to the lost C-type tag, and the activated C-type tag automatically becomes the group owner manager.

[0057] like Figure 4 As shown, the present invention proposes a cross-regional logistics tracking system based on passive tags, in which each transport vehicle is equipped with a wireless terminal, including:

[0058] The control console pages the wireless terminal on the transport vehicle at a certain period, and then generates a vehicle trajectory map based on the feedback from the wireless terminal. It compares the map with historical data to determine whether the transport vehicle status is abnormal based on the comparison results;

[0059] The wireless terminal receives the paging message from the control console, determines its own real-time location, and reports the real-time location to the control console.

[0060] See also Figure 5 , Figure 5 5 is a block diagram of a computing device 500 according to an exemplary embodiment of this specification. Components of the computing device 500 include, but are not limited to, a memory 510 and a processor 520. The processor 520 is connected to the memory 510 via a bus 530, and a database 550 is used to store data.

[0061] The computing device 500 also includes an access device 540 that enables the computing device 500 to communicate via one or more networks 560. Examples of such networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 540 may include one or more of any type of network interface (e.g., a network interface card (NIC)) whether wired or wireless, such as an IEEE 402.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, a Near Field Communication (NFC) interface, and the like.

[0062] In one embodiment of the present specification, the above components of the computing device 500 and Figure 5 Other components not shown in the figure may also be connected to each other, for example, via a bus. Figure 5 The computing device structure block diagram shown is for illustrative purposes only and is not intended to limit the scope of this specification. Those skilled in the art may add or replace other components as needed.

[0063] The computing device 500 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook computer, etc.), a mobile phone (e.g., a smartphone), a wearable computing device (e.g., a smartwatch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or a PC. The computing device 500 may also be a mobile or stationary server or a cloud server, etc.

[0064] The processor 520 is configured to execute the following computer executable instructions, which, when executed by the processor, implement the steps of the above-mentioned cross-regional logistics tracking method based on passive tags.

[0065] The above is a schematic diagram of a computing device according to this embodiment. It should be noted that the technical solution of this computing device is based on the same concept as the technical solution of the aforementioned cross-regional logistics tracking method based on passive tags. For details not described in detail in the technical solution of the computing device, please refer to the description of the technical solution of the aforementioned cross-regional logistics tracking method based on passive tags.

[0066] An embodiment of the present specification further provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the above-mentioned cross-regional logistics tracking method based on passive tags.

[0067] The above is a schematic diagram of a computer-readable storage medium according to this embodiment. It should be noted that the technical solution of this storage medium is based on the same concept as the above-mentioned method for cross-regional logistics tracking based on passive tags. For details not described in detail in the technical solution of the storage medium, please refer to the description of the technical solution of the above-mentioned method or system for cross-regional logistics tracking based on passive tags.

[0068] An embodiment of the present specification further provides a computer program, wherein when the computer program is executed in a computer, the computer is instructed to execute the steps of the above-mentioned cross-regional logistics tracking method based on passive tags.

[0069] The above is a schematic diagram of a computer program according to this embodiment. It should be noted that the technical solution of this computer program is based on the same concept as the technical solution of the aforementioned method or system for tracking cross-regional logistics using passive tags. For details not described in detail in the technical solution of the computer program, please refer to the description of the technical solution of the aforementioned method or system for tracking cross-regional logistics using passive tags.

[0070] The foregoing description of this specification describes specific embodiments. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0071] The computer instructions include computer program code, which may be in source code form, object code form, executable file, or some intermediate form. The computer-readable medium may include any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a mobile hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunications signal, and a software distribution medium.

[0072] It should be noted that for the aforementioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cross-regional logistics tracking method based on passive tags, characterized in that: Each transport vehicle is equipped with a wireless terminal, including: Step 1: The control console pages the wireless terminal on the transport vehicle at a certain period; Step 2: The wireless terminal on the transport vehicle receives the paging, determines its real-time location, and reports the real-time location to the control console; Step 3: The console generates a vehicle trajectory map based on the feedback from the wireless terminal, compares it with historical data, and determines whether the transport vehicle status is abnormal based on the comparison results.

2. The method according to claim 1, characterized in that In step three, the vehicle trajectory map is compared with historical data. If the comparison result shows that the vehicle position deviates from the safe area, travels too fast or too slow, stays for a certain period of time, or fails to arrive at the designated location at the designated time, the transport vehicle status is determined to be abnormal.

3. The method according to claim 1, characterized in that The second step of placing the Class A and Class C labels on the cargo loaded on the transport vehicle includes: The wireless terminal on the transport vehicle receives the paging, determines its own real-time location, and searches for the surrounding Class A and Class C tags. After receiving the response from the Class A and Class C tags, it reports the real-time location and the surrounding Class A and Class C tag information to the console.

4. The method according to claim 3, characterized in that Step three also includes: Step A1: The console compares the Class A and Class C tag information reported by the wireless terminal with the pre-stored tag information, and determines whether the Class A and Class C tags are lost based on the comparison results. The console then adds the lost Class A and Class C tags to a lost tag list and determines whether the Class C tag exists in the lost tag list. If so, it indicates that only the Class C tag is lost, or both the Class C tag and the Class A tag are lost. The console issues an alarm: "Class C tag lost," and proceeds to the next step. If not, the console issues an alarm: "Class A tag lost," and the process ends. Step A2: The console sends an activation message containing all Class C tag IDs in the lost tag list to activate the remote sending and receiving function of the Class C tags; Step A3: The console pages all Class C tags in the lost tag list at a certain period; Step A4: After receiving the paging call from the control station, the paged Class C tag determines its real-time location and searches for surrounding tags. After receiving responses from surrounding tags, it reports its real-time location and the surrounding tag information to the control station. Step A5: The console generates a trajectory map for each Class C tag based on the reported information from the Class C tags, and compares each Class C tag trajectory map with the vehicle trajectory map of the transport vehicle to determine whether each Class C tag has been aggregated to the transport vehicle. The console then sends a deactivation message to the Class C tags that have been aggregated to the transport vehicle to deactivate their remote transceiver capabilities, and deletes the Class C tag and its surrounding Class A tags from the lost tag list. Step A6: The console determines whether there are still Class C tags in the lost tag list. If so, go to step A3; if not, cancel the Class C tag loss alarm and end paging. If there are still Class A tags in the lost tag list, issue an alarm: "Class A tag lost". If there are no Class A tags in the lost tag list, cancel the Class A tag loss alarm.

5. The method according to claim 3, characterized in that Step three also includes: Step B1: The console compares the Class A and Class C tag information reported by the wireless terminal with the pre-stored tag information, and determines whether the Class A and Class C tags are lost based on the comparison results. The console then adds the lost Class A and Class C tags to a lost tag list, and then determines whether the Class C tag exists in the lost tag list. If so, it indicates that only the Class C tag is lost, or both the Class C tag and the Class A tag are lost. The console issues an alarm: "Class C tag lost," and proceeds to the next step. If not, the console issues an alarm: "Class A tag lost," and the process ends. Step B2: The console sends an activation message containing the IDs of all Class C tags in the lost tag list to activate the remote sending and receiving function of the Class C tags. The activated Class C tags automatically become group owners and managers. Step B3: The console periodically pages all group owner and administrator C-type tags in the lost tag list; Step B4: The paged group owner / administrator's C-type tag determines its own real-time location and searches for surrounding tags. After receiving responses from surrounding tags, it reports the real-time location and surrounding response tag information to the console. Step B5: The console determines whether there are multiple group owner / manager C-type tags in the same area based on the reported information from all group owner / manager C-type tags. If so, the console selects one of the C-type tags in the same area as the group owner / manager of the area based on the remaining power of the C-type tags. The console sends a deactivation message to the other group owner / manager C-type tags in the area to deactivate the remote transmission and reception capabilities of the other C-type tags, and then proceeds to the next step. If not, the console proceeds to the next step. Step B6: The console generates a trajectory map of each group owner / manager C-type tag based on the reported information of the group owner / manager C-type tag, and compares the trajectory map of each group owner / manager C-type tag with the vehicle trajectory map of the transport vehicle to determine whether each group owner / manager C-type tag has been aggregated into the transport vehicle. The console then sends a deactivation message to the group owner / manager C-type tag that has been aggregated into the transport vehicle to deactivate its remote transceiver capability, and simultaneously deletes the group owner / manager C-type tag and its surrounding corresponding A-type and C-type tags from the lost tag list. Step B7: The console determines whether there is still a Class C tag for the group owner or administrator in the lost tag list. If so, go to step B3; if not, cancel the Class C tag loss alarm and end the paging of the Class C tag. If there is still a Class A tag in the lost tag list, continue to issue the alarm: "Class A tag lost". If there is no Class A tag in the lost tag list, cancel the Class A tag loss alarm.

6. The method according to claim 5, characterized in that Step B5 also includes: Based on the received power, the console calculates the power of each group owner manager's C-class tag and determines whether its power is lower than the preset minimum power. If so, it selects a new group owner manager from other C-class tags in the area where the group owner manager's C-class tag belongs, sends a deactivation message to the original group owner manager's C-class tag, and sends an activation message to the new group owner manager's C-class tag. The activated C-class tag automatically becomes the group owner manager.

7. The method according to claim 5, characterized in that Between steps B5 and B6, the following is also included: The console compares the C-type tag information of the surrounding responses reported by the group owner manager's C-type tag with the historical reported information, and determines whether the C-type tags of the surrounding responses are lost based on the comparison results. If so, an activation message is sent to the lost C-type tag, and the activated C-type tag automatically becomes the group owner manager.

8. A cross-regional logistics tracking system based on passive tags, characterized in that: Each transport vehicle is equipped with a wireless terminal, including: The control console pages the wireless terminal on the transport vehicle at a certain period, and then generates a vehicle trajectory map based on the feedback from the wireless terminal. It compares the map with historical data to determine whether the transport vehicle status is abnormal based on the comparison results; The wireless terminal receives the paging message from the control console, determines its own real-time location, and reports the real-time location to the control console.

9. A computing device, characterized in that include: memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the cross-regional logistics tracking method based on passive tags according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that It stores computer-executable instructions, which, when executed by a processor, implement the steps of the cross-regional logistics tracking method based on passive tags as described in any one of claims 1 to 7.

Images