Deregistration method for passive internet of things device, device, storage medium, and product

Abstract

Disclosed in the present disclosure are a deregistration method for a passive Internet of Things device, a device, a storage medium and a product. The deregistration method comprises: acquiring a trigger condition for executing a deregistration operation for a passive Internet of Things device; and if it is determined that the trigger condition is satisfied, sending first information to a second device, the first information being used for requesting to execute the deregistration operation for the passive Internet of Things device, and the first information at least carrying identification information of the passive Internet of Things device. The present disclosure can actively execute the method and process for the registration operation for the passive Internet of Things device, by setting triggering conditions in a plurality of devices in a cellular passive Internet of Things to trigger the execution of the deregistration operation, effective management of the passive Internet of Things device can be achieved, thereby saving communication network resources.

Description

Deregistration method, device, storage medium and product for passive IoT device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims the priority of Chinese patent application with application number 202410195124.3 and application date of February 21, 2024. The entire content of this Chinese patent application is incorporated herein by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of Internet of Things, and in particular to a deregistration method, device, storage medium, and product for a passive Internet of Things device. Background Art

[0004] Driven by the internet and radio frequency identification (RFID) technologies, the Internet of Things (IoT) has rapidly developed and gained widespread adoption, aiming to achieve the interconnection of everything. With the development of passive backscatter technology, the passive IoT has gradually emerged in recent years. Compared to the active IoT, the sensors and tags in the passive IoT convert available wireless signals into energy while simultaneously transmitting information to target nodes. This solves the problem of active IoT sensors requiring battery power, which results in high manufacturing and maintenance costs.

[0005] In related technologies, a new passive IoT architecture, based on passive IoT technology and combined with cellular network technology, can achieve increased communication transmission distance, low-cost large-scale networking, and support the positioning of passive IoT devices. Because passive IoT sensors and tags require readers to send excitation signals to establish communication with them, passive IoT sensors and tags cannot actively send signals. Therefore, the network cannot timely obtain the connection status of passive IoT devices, and cannot effectively manage the registration status of passive IoT devices. Summary of the Invention

[0006] In view of this, the embodiments of the present disclosure provide a deregistration method, device, storage medium and product for a passive IoT device, aiming to provide a method for actively deregistering a passive IoT device in a cellular passive IoT scenario, thereby achieving effective management of the passive IoT device and saving communication network resources.

[0007] The technical solution of the embodiment of the present disclosure is implemented as follows:

[0008] In a first aspect, an embodiment of the present disclosure provides a deregistration method for a passive IoT device, which is applied to a first device and includes:

[0009] Obtaining trigger conditions for performing a deregistration operation on a passive IoT device; and

[0010] If it is determined that the trigger condition is met, sending the first information to the second device;

[0011] The first information is used to request the deregistration operation of the passive Internet of Things device, and the first information carries at least the identification information of the passive Internet of Things device.

[0012] In some embodiments, the first device is a unified data management (UDM) network element, the second device is a cellular passive management network element, and the method further includes:

[0013] receiving a first response message sent by the second device, where the first response message carries identification information and deregistration instruction information of the passive Internet of Things device; and

[0014] Based on the first response information, clear the stored first related information;

[0015] The first relevant information includes the contract information of the passive Internet of Things device.

[0016] In some embodiments, the first device is a passive Internet of Things server, the second device is a cellular passive management network element, and the method further includes:

[0017] receiving first response information sent by the second device, where the first response information carries at least identification information and deregistration instruction information of the passive Internet of Things device; and

[0018] Based on the first response information, clear the stored second related information;

[0019] The second relevant information includes registration information of the passive Internet of Things device.

[0020] In some embodiments, the first device is the passive IoT device, the second device is a reader / writer, and if it is determined that the trigger condition is satisfied, sending the first information to the second device includes:

[0021] receiving a passive Internet of Things instruction sent by the second device; and

[0022] If it is determined that the trigger condition is met, sending the first information to the second device based on the passive Internet of Things instruction;

[0023] The first information also carries registration request information.

[0024] In some embodiments, the method further comprises:

[0025] receiving a second message carrying deregistration instruction information sent by the second device; and

[0026] Based on the second information, the state of the passive Internet of Things device is changed to a deregistered state.

[0027] In some embodiments, the first device is the passive IoT device, the second device is a reader / writer, and if it is determined that the trigger condition is satisfied, sending the first information to the second device includes:

[0028] If it is determined that the trigger condition is met, changing the state of the passive IoT device to a deregistered state;

[0029] receiving a passive Internet of Things instruction sent by the second device; and

[0030] Based on the passive Internet of Things instruction, sending the first information to the second device;

[0031] The first information also carries status change indication information.

[0032] In some embodiments, if the first device is a UDM network element, the trigger condition includes one or more of the following conditions: expiration of the contracted service time of the passive Internet of Things device at the UDM network element and receipt of registration update indication information of the passive Internet of Things device;

[0033] If the first device is a passive Internet of Things server, the trigger condition includes at least one or more of the following conditions: the registration time of the passive Internet of Things device with the passive Internet of Things server expires and active deregistration instruction information of the passive Internet of Things device is received;

[0034] If the first device is the passive Internet of Things device, the trigger condition includes one or more of the following conditions: the contract service time of the passive Internet of Things device in the UDM network element expires, the registration time of the passive Internet of Things device in the passive Internet of Things server expires, and the physical location of the passive Internet of Things device changes.

[0035] In a second aspect, an embodiment of the present disclosure provides a deregistration method for a passive IoT device, which is applied to a second device. The method includes:

[0036] receiving first information sent by a first device, where the first information is used to request a deregistration operation of the passive Internet of Things device, and the first information carries at least identification information of the passive Internet of Things device; and

[0037] Based on the first information, sending third information to a third device;

[0038] Among them, the third information carries at least the identification information of the passive Internet of Things device.

[0039] In some embodiments, the first device is a UDM network element or a passive IoT server, the second device is a cellular passive management network element, and the third device is a passive IoT device;

[0040] The sending, based on the first information, third information to the third device includes:

[0041] Acquire service context information of the passive IoT device based on the identification information of the passive IoT device carried in the first information, where the service context information is stored on the second device and includes at least identification information of a radio access network (RAN) element serving the passive IoT device; and

[0042] Send the third information to the RAN network element; wherein the RAN network element is used to send the third information to the third device via the reader / writer serving the passive Internet of Things device based on the identification information of the passive Internet of Things device, and the third information also carries deregistration indication information.

[0043] In some embodiments, the method further comprises:

[0044] receiving second response information sent by the third device;

[0045] Based on the second response information, clearing the stored third related information; and

[0046] Based on the second response information, sending a first response information to the UDM network element and the passive Internet of Things server;

[0047] Among them, the second response information carries the identification information and state change indication information of the passive Internet of Things device; the first response information carries the identification information and deregistration indication information of the passive Internet of Things device; and the third relevant information includes the service context information.

[0048] In some embodiments, the first device is a passive IoT device, the second device is a reader / writer, and the third device is a UDM network element and a cellular passive management network element;

[0049] The sending, based on the first information, third information to the third device includes:

[0050] Based on the first information, sending third information to a third device via the RAN network element serving the passive IoT device;

[0051] The third information also carries identification information of the reader / writer; the third information also carries deregistration request information or status change indication information.

[0052] In some embodiments, the method further comprises:

[0053] receiving at least one of third response information and fourth response information sent by the third device; and

[0054] If it is determined that at least one of the third response information and the fourth response information carries the deregistration instruction information, sending a second message carrying the deregistration instruction information to the first device based on at least one of the third response information and the fourth response information;

[0055] The third response information is the response information of the third information sent by the UDM network element, and the fourth response information is the response information of the third information sent by the cellular passive management network element.

[0056] In a third aspect, an embodiment of the present disclosure provides a deregistration method for a passive IoT device, which is applied to a third device. The method includes:

[0057] receiving third information sent by the second device; and

[0058] Based on the third information, performing a deregistration operation of the passive IoT device;

[0059] Among them, the third information carries at least the identification information of the passive Internet of Things device.

[0060] In some embodiments, the second device is a cellular passive management network element, and the third device is a passive Internet of Things device; performing a deregistration operation of the passive Internet of Things device based on the third information includes:

[0061] Based on the third information, changing the state of the passive Internet of Things device to a deregistered state; and

[0062] Sending second response information to the second device;

[0063] The third information also carries deregistration indication information, and the second response information carries identification information and state change indication information of the passive Internet of Things device.

[0064] In some embodiments, the second device is a reader / writer, and the third device is a UDM network element; performing the deregistration operation of the passive IoT device based on the third information includes:

[0065] Based on the third information, clearing the stored first related information; and

[0066] Sending third response information to the second device;

[0067] Among them, the third response information is the response information of the third information, and the first relevant information includes the contract information of the passive Internet of Things device; if the third information carries the deregistration request information, then the third response information carries the deregistration indication information.

[0068] In some embodiments, the second device is a reader / writer, and the third device is a passive cellular management network element; performing the deregistration operation based on the third information includes:

[0069] Based on the third information, clearing the stored third related information;

[0070] Sending fourth response information to the second device; and

[0071] Based on the third information, sending fourth information to the passive Internet of Things server;

[0072] Among them, the fourth response information is the response information of the third information, and the third related information includes the service context information of the passive Internet of Things device; the fourth information carries the identification information and deregistration indication information of the passive Internet of Things device; if the third information carries the deregistration request information, then the fourth response information carries the deregistration indication information.

[0073] In a fourth aspect, an embodiment of the present disclosure provides a first device comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is configured to execute the steps of the method described in the first aspect when running the computer program.

[0074] In a fifth aspect, an embodiment of the present disclosure provides a second device comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is configured to execute the steps of the method described in the second aspect when running the computer program.

[0075] In a sixth aspect, an embodiment of the present disclosure provides a third device, comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein the processor is configured to execute the steps of the method described in the third aspect when running the computer program.

[0076] In a seventh aspect, an embodiment of the present disclosure provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the first aspect, the second aspect or the third aspect are implemented.

[0077] In an eighth aspect, an embodiment of the present disclosure provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the method described in the first aspect, the second aspect, or the third aspect.

[0078] The technical solution provided by the embodiments of the present disclosure obtains trigger conditions for executing a deregistration operation on a passive IoT device; if the trigger conditions are determined to be met, a first message is sent to a second device, wherein the first message is used to request execution of the deregistration operation on the passive IoT device and the first message carries at least identification information of the passive IoT device. Thus, the present disclosure provides a method and process for proactively executing a deregistration operation on a passive IoT device. By setting trigger conditions on multiple devices in a cellular passive IoT to trigger the deregistration operation, effective management of passive IoT devices is achieved, conserving communication network resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] FIG1 is a schematic diagram of the architecture of a cellular passive Internet of Things in the related art;

[0080] FIG2 is a schematic diagram of a method for communication between a passive IoT device and a reader / writer according to an embodiment of the present disclosure;

[0081] FIG3 is a flow chart of a method for deregistering a passive IoT device applied to a first device according to an embodiment of the present disclosure;

[0082] FIG4 is a schematic diagram of the architecture of a cellular passive Internet of Things according to an embodiment of the present disclosure;

[0083] FIG5 is a flow chart of a method for deregistering a passive IoT device applied to a second device according to an embodiment of the present disclosure;

[0084] FIG6 is a flow chart of a method for deregistering a passive IoT device applied to a third device according to an embodiment of the present disclosure;

[0085] FIG7 is a flow chart of a method for deregistering a passive IoT device in an application example of the present disclosure;

[0086] FIG8 is a schematic flow chart of a method for deregistering a passive IoT device in another application example of the present disclosure;

[0087] FIG9 is a schematic flow chart of a method for deregistering a passive IoT device in another application example of the present disclosure;

[0088] FIG10 is a schematic structural diagram of a first device according to an embodiment of the present disclosure;

[0089] FIG11 is a schematic structural diagram of a second device according to an embodiment of the present disclosure;

[0090] FIG12 is a schematic structural diagram of the third device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0091] The present disclosure will be described in further detail below with reference to the accompanying drawings and embodiments.

[0092] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0093] In related technologies, passive IoT systems can only meet local coverage application scenarios and lack mobility management methods.

[0094] Figure 1 is a schematic diagram of the architecture of a cellular passive Internet of Things (CIoT). The CIoT includes core network elements, user equipment (UE), RAN elements, and a data network (DN). The core network elements include an access and mobility management function (AMF), a network exposure function (NEF), a network slice selection function (NSSF), an authentication server function (AUSF), a policy control function (PCF), a unified data management (UDM), a session management function (SMF), and a user plane function (UPF).

[0095] Here, UE is specifically a passive IoT device. The passive IoT device refers to an ambient IoT device (Ambient IoT Device), including but not limited to: passive devices based on the backscatter principle (for example, passive tags), semi-passive devices based on the backscatter principle (for example, semi-passive tags) and active communication devices with power consumption at the level of hundreds of microwatts. The passive IoT device can also be called an ultra-low power terminal. It can be understood that the passive tag is only one form of the passive IoT device, and those skilled in the art can understand that the passive IoT device is not limited to the form of passive tags. The ultra-low power terminal can be a passive tag, a tag with active reporting capability, or other communication equipment based on radio frequency energy harvesting technology, backscattering technology, low-power computing technology, etc. The power consumption of the ultra-low power terminal is at or below the level of hundreds of microwatts.

[0096] It should be noted that RAN network elements connect to readers and writers, and data exchange with passive IoT devices is based on the readers and writers. As shown in Figure 2, the reader and writer transmit RF excitation signals to activate the passive tags of passive IoT devices. The passive tags use backscatter communication technology to modulate their own information onto the RF signal. The reader and writer receives the reflected signal from the passive tag and demodulates it, thus enabling information transmission between the reader and the passive tag.

[0097] Here, the radio frequency excitation signal may also be sent by an independent exciter.

[0098] It can be understood that the cellular passive Internet of Things reuses the cellular network infrastructure and network scale of the existing communication network, achieving the functions of increasing communication transmission distance, low-cost large-scale networking and supporting the positioning of passive Internet of Things devices.

[0099] It should be noted that since at least one of the passive tags and / or sensors installed on the passive IoT device cannot actively send information to the cellular network and cannot actively initiate registration or deregistration processes like terminal devices on the cellular network, it is necessary to set up an effective mechanism to enable the network to obtain the status of the passive IoT device in a timely manner and manage it, as well as support the registration and deregistration processes of the passive IoT device.

[0100] Based on this, the embodiment of the present disclosure provides a deregistration method for a passive IoT device, aiming to provide a method for actively deregistering a passive IoT device in a cellular passive IoT scenario, thereby achieving effective management of the passive IoT device and saving communication network resources.

[0101] The embodiment of the present disclosure provides a deregistration method for a passive IoT device, as shown in Figure 3. The deregistration method is applied to a first device and includes the following steps 301-302.

[0102] Step 301: Obtain a trigger condition for executing a deregistration operation of a passive IoT device.

[0103] Step 302: If it is determined that the trigger condition is met, the first information is sent to the second device.

[0104] The first information is used to request a deregistration operation of the passive Internet of Things device, and the first information carries at least identification information of the passive Internet of Things device.

[0105] It is understood that the first device in the embodiment of the present disclosure sets a trigger condition, and when it determines that the trigger condition is met, it actively sends a first message requesting the deregistration of the passive IoT device. The deregistration of the passive IoT device is performed by a network-side device and the passive IoT device. The network-side device clears the relevant information of the deregistered passive IoT device, and the passive IoT device changes its state to a deregistered state.

[0106] Furthermore, the first device includes a UDM network element, a passive Internet of Things server or a passive Internet of Things device.

[0107] Here, the passive IoT server stores the registration information of the passive IoT devices.

[0108] The embodiments of the present disclosure provide a schematic diagram of the architecture of a cellular passive IoT, as shown in Figure 4. Compared to the traditional cellular passive IoT architecture, the embodiments of the present disclosure add a cellular passive management network element, which is used to enable communication between the passive IoT server, RAN network elements, and core network elements, and to store relevant information about passive IoT devices.

[0109] In an application example of the present disclosure, the cellular passive management network element and the NEF network element are combined into one network element.

[0110] In another application example of the present disclosure, the cellular passive management network element and the UPF network element are combined into one network element. If the cellular passive management network element and the UPF network element are combined into one network element, the cellular passive Internet of Things does not set the NEF network element.

[0111] Here, the passive IoT device exchanges data with the corresponding reader / writer through the set passive tag, and exchanges data with the RAN network element through the reader / writer.

[0112] Furthermore, the second device includes a cellular passive management network element or a reader / writer.

[0113] Furthermore, if the first device is a UDM network element or a passive Internet of Things server, the corresponding second device is a cellular passive management network element; if the first device is a passive Internet of Things device, the corresponding second device is a reader / writer.

[0114] Exemplarily, if the first device is a UDM network element, the triggering condition includes one or more of the following conditions: expiration of the contracted service time of the passive IoT device in the UDM network element and receipt of registration update indication information of the passive IoT device;

[0115] If the first device is a passive IoT server, the triggering condition includes at least one or more of the following conditions: expiration of the registration time of the passive IoT device with the passive IoT server and receipt of active deregistration instruction information of the passive IoT device;

[0116] If the first device is a passive IoT device, the triggering condition includes one or more of the following conditions: expiration of the contracted service time of the passive IoT device in the UDM network element, expiration of the registration time of the passive IoT device in the passive IoT server, and change of the physical location of the passive IoT device.

[0117] It can be understood that the UDM network element and the passive IoT device store the contract service time of the passive IoT device, and the passive IoT server and the passive IoT device store the registration time of the passive IoT device. When at least one of the contract service time and the registration time expires and no renewal indication information is received, the trigger body condition set by the first device is met, and the first request is actively sent.

[0118] It is understandable that when a passive IoT device detects a change in physical location, it will also actively send a first request.

[0119] It should be noted that the trigger conditions set on the first device are not limited to the above-mentioned trigger conditions. The trigger conditions provided in the embodiment of the present disclosure are only example conditions for implementing the technical solution of the present disclosure. The technical solution of the embodiment of the present disclosure can also be implemented by setting other trigger conditions on the first device (for example, detecting that the passive tag has fallen off).

[0120] Exemplarily, the first device is a unified data management function (UDM) network element, and the second device is a cellular passive management network element. The method further includes:

[0121] receiving first response information sent by the second device, where the first response information carries identification information and deregistration instruction information of the passive Internet of Things device; and

[0122] Based on the first response information, clear the stored first related information;

[0123] Among them, the first relevant information includes the contract information of the passive Internet of Things device.

[0124] Here, the first response information is the response information indicating that the passive IoT device has completed the deregistration operation. The UDM network element completes the deregistration operation based on the identification information and deregistration indication information of the passive IoT device, and clears the stored contract information of the passive IoT device.

[0125] Here, the contract information of the passive Internet of Things device includes identification information of the passive Internet of Things device, contract service time, contract service package, contract service quality and contract service strategy.

[0126] In an application example of the present disclosure, the UDM network element stores service context information of the passive Internet of Things device, and the UDM network element also clears the stored service context information of the passive Internet of Things device based on the first response information.

[0127] Exemplarily, the first device is a passive Internet of Things server, the second device is a cellular passive management network element, and the method further includes:

[0128] receiving first response information sent by the second device, where the first response information carries at least identification information and deregistration instruction information of the passive Internet of Things device; and

[0129] Based on the first response information, clear the stored second related information;

[0130] The second relevant information includes registration information of the passive Internet of Things device.

[0131] Here, the passive Internet of Things server completes the deregistration operation based on the identification information and deregistration instruction information of the passive Internet of Things device, and clears the stored registration information of the passive Internet of Things device.

[0132] Here, the registration information of the passive IoT device includes identification information, status information and registration time of the passive IoT device.

[0133] Exemplarily, the first device is a passive IoT device, and the second device is a reader / writer. If it is determined that a trigger condition is met, sending the first information to the second device includes:

[0134] receiving a passive Internet of Things instruction sent by a second device; and

[0135] If it is determined that the trigger condition is met, sending the first information to the second device based on the passive Internet of Things instruction;

[0136] The first information also carries registration request information.

[0137] It should be noted that since the passive tag of the passive Internet of Things device cannot actively send information to the reader, when it is determined that the trigger conditions set by the passive Internet of Things device are met, an excitation signal corresponding to the passive Internet of Things instruction sent by the reader is required to send the first information.

[0138] Here, the passive Internet of Things instruction can be an inventory instruction or a read-write instruction. The embodiment of the present disclosure does not specifically limit the function of the passive Internet of Things instruction. It only requires an excitation signal corresponding to the passive Internet of Things instruction to send the first information.

[0139] Exemplarily, the deregistration method further includes:

[0140] receiving a second message carrying deregistration instruction information sent by a second device; and

[0141] Based on the second information, the state of the passive Internet of Things device is changed to a deregistered state.

[0142] Here, the second information is response information of the deregistration request of the passive Internet of Things device. The second information carries deregistration indication information. The passive Internet of Things device changes its own state to the deregistration state based on the deregistration indication information.

[0143] Exemplarily, the first device is a passive IoT device, and the second device is a reader / writer. If it is determined that a trigger condition is met, sending the first information to the second device includes:

[0144] If the trigger condition is determined to be met, the state of the passive IoT device is changed to the unregistered state;

[0145] receiving a passive Internet of Things instruction sent by a second device; and

[0146] Sending the first information to the second device based on the passive Internet of Things instruction;

[0147] The first information also carries status change indication information.

[0148] Here, when it is determined that the trigger condition of the passive Internet of Things device is met, the state of the passive Internet of Things device is changed to the deregistered state; when the passive Internet of Things device receives the passive Internet of Things instruction, it sends the first information to the reader based on the excitation signal corresponding to the passive Internet of Things instruction, wherein the state change indication information carried by the first information indicates that the state of the passive Internet of Things device has been changed to the deregistered state.

[0149] It is understandable that when it is determined that the trigger conditions of the passive Internet of Things device are met, the passive Internet of Things device can send a deregistration request message, wait for the core network device to respond, and then change its own status to the deregistration state; the passive Internet of Things device can also directly change its own status to the deregistration state, and after receiving the passive Internet of Things instruction, send a status change indication message to indicate the status change.

[0150] It can be understood that the embodiments of the present disclosure provide a method and process for actively executing the deregistration operation of a passive Internet of Things device. By setting trigger conditions on multiple devices in a cellular passive Internet of Things to trigger the execution of the deregistration operation, effective management of the passive Internet of Things devices can be achieved, saving communication network resources.

[0151] Illustratively, an embodiment of the present disclosure provides a deregistration method for a passive IoT device, as shown in Figure 5. The deregistration method is applied to a second device, and includes the following steps 501-502.

[0152] Step 501: Receive first information sent by a first device, where the first information is used to request a deregistration operation of a passive Internet of Things device, and the first information carries at least identification information of the passive Internet of Things device.

[0153] Step 502: Send third information to a third device based on the first information.

[0154] The third information at least carries identification information of the passive Internet of Things device.

[0155] Furthermore, the second device includes a cellular passive management network element or a reader / writer.

[0156] Furthermore, the third device includes a passive Internet of Things device, or at least one of a cellular passive management network element and a UDM network element.

[0157] Furthermore, if the second device is a cellular passive management network element, correspondingly, the third device is a passive Internet of Things device; if the second device is a reader / writer, correspondingly, the third device includes at least one of a cellular passive management network element and a UDM network element.

[0158] Exemplarily, the first device is a UDM network element or a passive Internet of Things server, the second device is a cellular passive management network element, and the third device is a passive Internet of Things device; based on the first information, sending the third information to the third device includes:

[0159] Based on the identification information of the passive Internet of Things device carried in the first information, obtaining service context information of the passive Internet of Things device, where the service context information is stored on the second device and includes at least identification information of a radio access network RAN ​​network element serving the passive Internet of Things device; and

[0160] Send the third information to the RAN network element; wherein the RAN network element is used to send the third information to the third device via the reader / writer serving the passive Internet of Things device based on the identification information of the passive Internet of Things device, and the third information also carries registration indication information.

[0161] It should be noted that the cellular passive management network element stores the service context information of the passive IoT device, and the service context information includes the identification information of the RAN network element and the core network element serving the passive IoT device; based on obtaining the service context information of the passive IoT device, the cellular passive management network element determines the communication path connecting the passive IoT device.

[0162] Here, the cellular passive management network element may set an air interface to directly send the third information to the RAN network element.

[0163] Here, the third information is used to instruct the passive IoT device to perform a deregistration operation.

[0164] In an application example of the present disclosure, a cellular passive management network element obtains identification information of an AMF network element serving a passive IoT device and sends third information to the AMF network element; after receiving the third information, the AMF network element sends the third information to the RAN network element.

[0165] It can be understood that after the RAN network element receives the third information, it determines the reader / writer serving the passive IoT device based on the identification information of the passive IoT device carried in the third information. After the reader / writer receives the third information, it generates an excitation signal and sends the deregistration indication information to the passive IoT device.

[0166] Exemplarily, the first device is a UDM network element or a passive Internet of Things server, the second device is a cellular passive management network element, and the third device is a passive Internet of Things device; the deregistration method further includes:

[0167] receiving second response information sent by the third device;

[0168] Based on the second response information, clearing the stored third related information; and

[0169] Based on the second response information, the first response information is sent to the UDM network element or the passive Internet of Things server.

[0170] Among them, the second response information carries the identification information and state change indication information of the passive Internet of Things device; the first response information carries the identification information and deregistration indication information of the passive Internet of Things device; and the third related information includes service context information.

[0171] It can be understood that the second response information is a response information to the deregistration indication information sent by the passive Internet of Things device. The state change indication information carried by the second response information indicates that the state of the passive Internet of Things device has changed to a deregistered state. The cellular passive management network element clears the stored service context information of the corresponding passive Internet of Things device based on the identification information and state change indication information of the passive Internet of Things device.

[0172] It should be noted that regardless of whether the first device is a UDM network element or a passive Internet of Things server, that is, regardless of whether the UDM network element or the passive Internet of Things server sends the first information requesting to perform the deregistration operation of the passive Internet of Things device, after the cellular passive management network element receives the second response information, it will send the first response information to the UDM network element or the passive Internet of Things server to instruct the UDM network element or the passive Internet of Things server to perform their respective deregistration operations.

[0173] Exemplarily, the first device is a passive IoT device, the second device is a reader / writer, and the third device is a UDM network element and a cellular passive management network element; based on the first information, sending the third information to the third device includes:

[0174] Based on the first information, third information is sent to the third device via the RAN network element serving the passive Internet of Things device.

[0175] The third information also carries identification information of the reader / writer; the third information also carries deregistration request information or status change indication information.

[0176] Here, the third information carries not only the information carried by the first information but also the identification information of the reader / writer.

[0177] It should be noted that the reader can send the third information based on the first information received from a passive IoT device, or can send the third information based on the first information received from multiple passive IoT devices.

[0178] It should be noted that the reader sends an access network (AN) message to the RAN network element. The AN message carries at least a non-access service (NAS) message, the identification information of the passive IoT device and the identification information of the reader, as well as deregistration request information or status change indication information. The NAS message carries at least the identification information of the passive IoT device, the identification information of the reader, and deregistration request information or status change indication information. The NAS message can also carry the identification information of the passive IoT server (including the full domain name, IP address and tunnel ID). After receiving the AN message, the RAN network element directly sends the third information to the UDM network element or the passive IoT server.

[0179] In an application example of the present disclosure, after receiving the AN message, the RAN network element sends the NAS message carried in the AN message to the AMF network element, and the AMF network element sends the third information to the UDM network element and the passive Internet of Things server.

[0180] Exemplarily, the first device is a passive IoT device, the second device is a reader / writer, and the third device is a UDM network element and a cellular passive management network element; the deregistration method further includes:

[0181] receiving at least one of third response information and fourth response information sent by the third device;

[0182] If it is determined that at least one of the third response information and the fourth response information carries the deregistration instruction information, a second message carrying the deregistration instruction information is sent to the first device based on at least one of the third response information and the fourth response information.

[0183] The third response information is response information of the third information sent by the UDM network element, and the fourth response information is response information of the third information sent by the cellular passive management network element.

[0184] It should be noted that if the first information sent by the passive Internet of Things device carries deregistration request information, at least one of the UDM network element and the cellular passive management network element generates deregistration indication information based on the deregistration request information, and at least one of the third response information and the fourth response information carries the deregistration indication information.

[0185] In an application example of the present disclosure, if it is determined that at least one of the third response information and the fourth response information does not carry deregistration indication information, a fifth response information is sent to the passive Internet of Things device, wherein the fifth response information indicates that at least one of the UDM network element and the cellular passive management network element has performed a deregistration operation.

[0186] The embodiment of the present disclosure provides a deregistration method for a passive IoT device, as shown in Figure 6. The deregistration method is applied to a third device and includes the following steps 601-602.

[0187] Step 601: Receive third information sent by the second device.

[0188] Step 602: Based on the third information, perform a deregistration operation of the passive IoT device.

[0189] The third information at least carries identification information of the passive Internet of Things device.

[0190] Furthermore, the third device includes a passive Internet of Things device, or at least one of a cellular passive management network element and a UDM network element.

[0191] Furthermore, if the third device is a passive Internet of Things device, correspondingly, the second device is a cellular passive management network element; if the third device includes at least one of a cellular passive management network element and a UDM network element, correspondingly, the second device is a reader / writer.

[0192] Exemplarily, the second device is a cellular passive management network element, and the third device is a passive Internet of Things device; based on the third information, performing a deregistration operation of the passive Internet of Things device includes:

[0193] Based on the third information, changing the state of the passive IoT device to a deregistered state; and

[0194] Sending a second response message to the second device.

[0195] Among them, the third information also carries deregistration indication information, and the second response information carries identification information and state change indication information of the passive Internet of Things device.

[0196] It can be understood that the passive Internet of Things information is changed to a deregistered state based on the deregistration indication information, and the second response information indicating that the state has been changed to the deregistration state is sent to the reader.

[0197] Exemplarily, the second device is a reader / writer, and the third device is a UDM network element; performing a passive IoT device deregistration operation based on the third information includes:

[0198] Based on the third information, clearing the stored first related information; and

[0199] Sending third response information to the second device.

[0200] Among them, the third response information is the response information of the third information, and the first related information includes the contract information of the passive Internet of Things device; if the third information carries deregistration request information, the third response information carries deregistration indication information.

[0201] Exemplarily, the second device is a reader / writer, and the third device is a passive cellular management network element; performing a deregistration operation based on the third information includes:

[0202] Based on the third information, clearing the stored third related information;

[0203] Sending fourth response information to the second device; and

[0204] Based on the third information, fourth information is sent to the passive Internet of Things server.

[0205] Among them, the fourth response information is the response information of the third information, and the third related information includes the service context information of the passive Internet of Things device; the fourth information carries the identification information and deregistration indication information of the passive Internet of Things device; if the third information carries deregistration request information, the fourth response information carries the deregistration indication information.

[0206] Here, after the reader receives the first information sent by the passive Internet of Things device, it sends the third information to the UDM network element and the passive cellular management network element respectively. The passive cellular management network element performs its own deregistration operation based on the deregistration request information or deregistration indication information carried by the third information.

[0207] It can be understood that after the passive cellular management network element receives the third information, it sends the fourth information carrying the identification information of the passive Internet of Things device and the deregistration instruction information to the passive Internet of Things server, and the passive Internet of Things server clears the stored registration information of the passive Internet of Things device based on the fourth information.

[0208] It can be understood that in the technical solution of the present invention, when it is determined that the trigger conditions of the passive Internet of Things device are met, the first device requests to perform a deregistration operation, and the third device performs the deregistration operation, providing a method and process for actively performing a deregistration operation of a passive Internet of Things device in a cellular passive Internet of Things scenario, thereby achieving effective management of passive Internet of Things devices and saving communication network resources.

[0209] The present disclosure is further described in detail below with reference to application examples.

[0210] Application Example 1

[0211] This application example corresponds to a scenario in which the first device includes a UDM network element or a cellular IoT server, the second device is a cellular passive management network element, and the third device is a passive IoT device.

[0212] As shown in FIG7 , the deregistration method for a passive IoT device of this application example includes the following steps 701 a - 714 .

[0213] Step 701a: The UDM network element sends first information to the cellular passive management network element.

[0214] Step 701b: The passive Internet of Things server sends the first information to the cellular passive management network element.

[0215] Here, when the trigger condition set by the UDM network element is met, step 701a is executed; when the trigger condition set by the passive Internet of Things server is met, step 701b is executed.

[0216] Here, this application example executes step 701a or step 701b.

[0217] Here, the first information carries identification information of the passive Internet of Things device.

[0218] Here, the passive Internet of Things server can send the first information to the cellular passive management network element through the NEF network element. If the cellular passive management network element and the UPF network element are combined into one network element, the passive Internet of Things server directly sends the first information to the cellular passive management network element.

[0219] Step 702: The cellular passive management network element determines a RAN network element and sends third information to the RAN network element.

[0220] Here, the third information carries identification information and deregistration instruction information of the passive Internet of Things device.

[0221] Here, the cellular passive management network element can directly send the third information to the RAN network element; it can also send the third information to the AMF network element, and the AMF network element sends the third information to the RAN network element.

[0222] Step 703: The RAN network element sends the third information to the reader.

[0223] Here, the third information carries identification information and deregistration instruction information of the passive Internet of Things device.

[0224] Step 704: The reader sends the third information to the passive IoT device.

[0225] Here, the third information carries deregistration instruction information.

[0226] Here, step 704 sends the third information based on the excitation signal generated by the reader / writer, wherein the excitation signal may also be generated by the exciter.

[0227] Step 705: The passive IoT device changes to a deregistered state.

[0228] Here, the passive IoT device changes to a deregistered state based on the deregistration indication information.

[0229] Step 706: The passive IoT device sends a second response message to the reader.

[0230] Here, the second response information carries the identification information and state change indication information of the passive Internet of Things device.

[0231] Here, step 706 sends second response information based on the excitation signal generated in step 704 .

[0232] Step 707: The reader sends a second response message to the RAN network element.

[0233] Here, the second response information carries the identification information and state change indication information of the passive Internet of Things device.

[0234] Here, the second response information may be an AN message.

[0235] Step 708: The RAN network element sends a second response message to the cellular passive management network element.

[0236] Here, the second response information carries the identification information and state change indication information of the passive Internet of Things device.

[0237] Here, the second response information may be a NAS message.

[0238] Here, the RAN network element can directly send the second response information to the cellular passive management network element; it can also send the second response information to the AMF network element, and the AMF network element sends the second response information to the cellular passive management network element.

[0239] Step 709: The cellular passive management network element clears the stored service context information.

[0240] Here, the service context information of the passive Internet of Things device includes at least: identification information of the RAN network element and the AMF network element serving the passive Internet of Things device.

[0241] Step 710: The cellular passive management network element sends a first response message to the UDM network element.

[0242] Here, the first response information carries identification information and deregistration instruction information of the passive IoT device.

[0243] Step 711: The UDM network element clears the stored contract information.

[0244] Here, the contract information of the passive Internet of Things device includes at least: identification information of the passive Internet of Things device, contract service time, contract service package, contract service quality and contract service strategy.

[0245] Step 712: The cellular passive management network element sends a first response message to the passive Internet of Things device.

[0246] Here, the first response information carries identification information and deregistration instruction information of the passive IoT device.

[0247] Step 713: The reader sends a first response message to the passive IoT device.

[0248] Here, the first response information carries identification information and deregistration instruction information of the passive IoT device.

[0249] Here, this application example executes step 712 and / or step 713 .

[0250] Step 714: The passive IoT device clears the stored registration information.

[0251] Here, step 714 clears the stored registration information of the passive IoT device based on the first response information sent in step 712 or step 713.

[0252] Here, the registration information of the passive Internet of Things device includes at least: identification information, status information and registration time of the passive Internet of Things device.

[0253] It can be understood that Application Example 1 provides a method for deregistering passive IoT devices in a cellular passive IoT scenario when the trigger conditions set by the UDM network element or the passive IoT server are met, thereby achieving effective management of passive IoT devices and saving communication network resources.

[0254] Application Example 2

[0255] This application example corresponds to a scenario in which the first device includes a passive IoT device, the second device is a reader / writer, and the third device is at least one of a UDM network element and a cellular passive management network element.

[0256] As shown in FIG8 , the deregistration method for a passive IoT device of this application example includes the following steps 801 - 815 .

[0257] Step 801: The passive IoT device changes to a deregistered state.

[0258] Here, when the trigger condition set by the passive IoT device is met, step 801 is executed.

[0259] Step 802: The reader sends a passive IoT instruction to the passive IoT device.

[0260] Here, the passive Internet of Things instruction may be an inventory instruction or a read-write instruction.

[0261] Here, step 802 sends a passive Internet of Things instruction based on an excitation signal generated by the reader / writer, wherein the excitation signal may also be generated by an exciter.

[0262] Step 803: The passive IoT device sends the first information to the reader.

[0263] Here, the first information carries identification information and deregistration instruction information of the passive Internet of Things device.

[0264] Here, step 803 sends the first information based on the excitation signal generated in step 802.

[0265] Step 804: The reader sends the third information to the RAN network element.

[0266] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and deregistration instruction information.

[0267] Here, the third information may be an AN message.

[0268] Step 805: The RAN network element sends the third information to the AMF network element.

[0269] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and deregistration instruction information.

[0270] Here, the third information may be a NAS message.

[0271] Step 806: The AMF network element sends the third information to the UDM network element.

[0272] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and deregistration instruction information.

[0273] Step 807: The UDM network element clears the stored contract information.

[0274] Here, the contract information of the passive Internet of Things device includes at least: identification information of the passive Internet of Things device, contract service time, contract service package, contract service quality and contract service strategy.

[0275] Step 808: The AMF network element sends the third information to the cellular passive management network element.

[0276] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and deregistration instruction information.

[0277] Step 809: The cellular passive management network element clears the stored service context information.

[0278] Here, the service context information of the passive Internet of Things device includes at least: identification information of the RAN network element and the AMF network element serving the passive Internet of Things device.

[0279] Here, the RAN network element may also directly send the third information to the UDM network element and the cellular passive management network element.

[0280] Step 810: The UDM network element sends a third response message to the AMF network element.

[0281] Here, based on the completion of step 807, step 810 is executed.

[0282] Here, the third response information carries the identification information of the passive IoT device.

[0283] Step 811: The cellular passive management network element sends a fourth response message to the AMF network element.

[0284] Here, based on the completion of step 809, step 811 is executed.

[0285] Here, the fourth response information carries the identification information of the passive Internet of Things device.

[0286] Step 812: The cellular passive management network element sends the fourth information to the passive Internet of Things server.

[0287] Here, based on the completion of step 809, step 812 is executed.

[0288] Here, the fourth information carries identification information and removal indication information of the passive Internet of Things device.

[0289] Step 813: The AMF network element sends at least one of the third response information and the fourth response information to the reader.

[0290] Here, the AMF network element sends at least one of the third response information and the fourth response information to the RAN network element, and the RAN network element sends at least one of the third response information and the fourth response information to the reader / writer.

[0291] Here, at least one of the third response information and the fourth response information carries identification information of the passive Internet of Things device.

[0292] In step 814 , the reader sends a fifth response message to the passive IoT device.

[0293] Here, the fifth response information indicates that at least one of the UDM network element and the cellular passive management network element has performed a deregistration operation.

[0294] Here, based on the completion of step 813, step 814 is executed.

[0295] Here, step 814 is a preferred option in this application example.

[0296] Step 815: The reader sends the fourth information to the passive Internet of Things server.

[0297] Here, based on the completion of step 813, step 815 is executed.

[0298] Here, the fourth information carries identification information and removal indication information of the passive Internet of Things device.

[0299] Here, this application example executes at least one of step 812 and step 815 .

[0300] Step 816: The passive IoT device clears the stored registration information.

[0301] Here, step 816 is the fourth information sent in step 812 or step 815 to clear the stored registration information of the passive IoT device.

[0302] Here, the registration information of the passive Internet of Things device includes at least: identification information, status information and registration time of the passive Internet of Things device.

[0303] It can be understood that Application Example 2 provides a method for deregistering passive IoT devices in a cellular passive IoT scenario when the triggering conditions of the passive IoT server device are met, thereby achieving effective management of passive IoT devices and saving communication network resources.

[0304] Application Example 3

[0305] This application example corresponds to a scenario in which the first device includes a passive IoT device, the second device is a reader / writer, and the third device is at least one of a UDM network element and a cellular passive management network element.

[0306] As shown in FIG9 , the deregistration method for a passive IoT device of this application example includes the following steps 901 - 916 .

[0307] Step 901: The reader sends a passive IoT instruction to a passive IoT device.

[0308] Here, the passive Internet of Things instruction may be an inventory instruction or a read-write instruction.

[0309] Here, step 901 sends a passive Internet of Things instruction based on an excitation signal generated by the reader / writer, wherein the excitation signal may also be generated by an exciter.

[0310] Step 902: The passive IoT device sends first information to a reader / writer.

[0311] Here, when the trigger condition set by the passive IoT device is met, step 902 is executed.

[0312] Here, the first information carries identification information and deregistration request information of the passive Internet of Things device.

[0313] Here, step 902 sends the first information based on the excitation signal generated in step 901 .

[0314] Step 903: The reader sends the third information to the RAN network element.

[0315] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and the deregistration request information.

[0316] Here, the third information may be an AN message.

[0317] Step 904: The RAN network element sends the third information to the AMF network element.

[0318] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and the deregistration request information.

[0319] Here, the third information may be a NAS message.

[0320] Step 905: The AMF network element sends the third information to the UDM network element.

[0321] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and the deregistration request information.

[0322] Step 906: The UDM network element clears the stored contract information.

[0323] Here, the contract information of the passive Internet of Things device includes at least: identification information of the passive Internet of Things device, contract service time, contract service package, contract service quality and contract service strategy.

[0324] Step 907: The AMF network element sends the third information to the cellular passive management network element.

[0325] Here, the third information carries the identification information of the passive IoT device, the identification information of the reader / writer, and the deregistration request information.

[0326] Step 908: The cellular passive management network element clears the stored service context information.

[0327] Here, the service context information of the passive Internet of Things device includes at least: identification information of the RAN network element and the AMF network element serving the passive Internet of Things device.

[0328] Here, the RAN network element may also directly send the third information to the UDM network element and the cellular passive management network element.

[0329] Step 909: The UDM network element sends a third response message to the AMF network element.

[0330] Here, based on the completion of step 906, step 909 is executed.

[0331] Here, the third response information carries the identification information of the passive IoT device and deregistration instruction information.

[0332] Step 910: The cellular passive management network element sends a fourth response message to the AMF network element.

[0333] Here, based on the completion of step 908, step 910 is executed.

[0334] Here, the fourth response information carries the identification information of the passive Internet of Things device and the deregistration instruction information.

[0335] Step 911: The cellular passive management network element sends fourth information to the passive Internet of Things server.

[0336] Here, based on the completion of step 908, step 911 is executed.

[0337] Here, the fourth information carries identification information and removal indication information of the passive Internet of Things device.

[0338] Step 912: The AMF network element sends at least one of the third response information and the fourth response information to the reader.

[0339] Here, the AMF network element sends at least one of the third response information and the fourth response information to the RAN network element, and the RAN network element sends at least one of the third response information and the fourth response information to the reader / writer.

[0340] Here, at least one of the third response information and the fourth response information carries identification information and deregistration instruction information of the passive Internet of Things device.

[0341] Step 913: The reader sends the second information to the passive IoT device.

[0342] Here, the second information carries deregistration instruction information.

[0343] Step 914: The passive IoT device changes to a deregistered state.

[0344] Step 915: The reader sends the fourth information to the passive Internet of Things server.

[0345] Here, based on the completion of step 912, step 915 is executed.

[0346] Here, the fourth information carries identification information and removal indication information of the passive Internet of Things device.

[0347] Here, this application example executes at least one of step 911 and step 915 .

[0348] Step 916: The passive IoT device clears the stored registration information.

[0349] Here, step 916 is the fourth information sent in step 911 or step 915 to clear the stored registration information of the passive IoT device.

[0350] Here, the registration information of the passive Internet of Things device includes at least: identification information, status information and registration time of the passive Internet of Things device.

[0351] It can be understood that Application Example 3 provides a method for deregistering passive IoT devices in a cellular passive IoT scenario when the triggering conditions of the passive IoT server device are met, thereby achieving effective management of passive IoT devices and saving communication network resources.

[0352] It should be noted that Application Example 1 and Application Example 2 can be implemented in the same cellular passive IoT scenario.

[0353] It should be noted that Application Example 1 and Application Example 3 can be implemented in the same cellular passive IoT scenario.

[0354] In order to implement the method of the embodiment of the present disclosure, the embodiment of the present disclosure further provides a first device. FIG10 only shows an exemplary structure of the first device rather than the entire structure. Part or all of the structure shown in FIG10 can be implemented as needed.

[0355] As shown in Figure 10 , a first device 1000 provided in an embodiment of the present disclosure includes: at least one processor 1001, a memory 1002, a user interface 1003, and at least one network interface 1004. The various components in the first device 1000 are coupled together via a bus system 1005. It will be appreciated that the bus system 1005 is used to enable connections and communications between these components. In addition to a data bus, the bus system 1005 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in Figure 10 , all of these buses are labeled as the bus system 1005.

[0356] The user interface 1003 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0357] The memory 1002 in the embodiment of the present disclosure is used to store various types of data to support the operation of the first device 1000. Examples of such data include: any computer program used to operate on the first device 1000.

[0358] The deregistration method for a passive IoT device applied to the first device 1000 disclosed in the embodiments of the present disclosure can be applied to or implemented by the processor 1001. The processor 1001 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the deregistration method for a passive IoT device applied to the first device 1000 can be performed by hardware integrated logic circuits or software instructions in the processor 1001. The processor 1001 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. The processor 1001 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present disclosure applied to the first device 1000. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present disclosure can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 1002. The processor 1001 reads the information in the memory 1002 and combines its hardware to complete the steps of the deregistration method for the passive Internet of Things device applied to the first device 1000 provided in the embodiment of the present disclosure.

[0359] In an exemplary embodiment, the first device 1000 can be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), FPGAs, general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to execute the aforementioned deregistration method for a passive IoT device applied to the first device 1000.

[0360] Furthermore, the first device includes a UDM network element, a passive Internet of Things server or a passive Internet of Things device.

[0361] In order to implement the method of the embodiment of the present disclosure, the embodiment of the present disclosure further provides a second device. FIG11 only shows an exemplary structure of the second device rather than the entire structure. Part or all of the structure shown in FIG11 can be implemented as needed.

[0362] As shown in FIG11 , the second device 1100 provided in an embodiment of the present disclosure includes: at least one processor 1101, a memory 1102, a user interface 1103, and at least one network interface 1104. The various components in the second device 1100 are coupled together via a bus system 1105. It will be appreciated that the bus system 1105 is used to enable connections and communications between these components. In addition to a data bus, the bus system 1105 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in FIG11 , all of the various buses are labeled as the bus system 1105.

[0363] The user interface 1103 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0364] The memory 1102 in the embodiment of the present disclosure is used to store various types of data to support the operation of the second device 1100. Examples of such data include any computer program used to operate on the second device 1100.

[0365] The deregistration method for a passive IoT device applied to a second device 1100 disclosed in the embodiments of the present disclosure can be applied to or implemented by processor 1101. Processor 1101 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the deregistration method for a passive IoT device applied to the second device 1100 can be performed by hardware integrated logic circuits or software instructions within processor 1101. The processor 1101 may be a general-purpose processor, a DSP, or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Processor 1101 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present disclosure for application to the second device 1100. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present disclosure can be directly executed by a hardware decoding processor or by a combination of hardware and software modules within the decoding processor. The software module can be located in a storage medium, which is located in the memory 1102. The processor 1101 reads the information in the memory 1102 and combines its hardware to complete the steps of the deregistration method for a passive Internet of Things device applied to the second device 1100 provided in the embodiment of the present disclosure.

[0366] In an exemplary embodiment, the second device 1100 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components to perform the aforementioned deregistration method for a passive IoT device applied to the second device 1100.

[0367] Furthermore, the second device includes a cellular passive management network element or a reader / writer.

[0368] Furthermore, if the first device is a UDM network element or a passive Internet of Things server, the corresponding second device is a cellular passive management network element; if the first device is a passive Internet of Things device, the corresponding second device is a reader / writer.

[0369] In order to implement the method of the embodiment of the present disclosure, the embodiment of the present disclosure further provides a third device. FIG12 only shows an exemplary structure of the third device rather than the entire structure. Part or all of the structure shown in FIG12 can be implemented as needed.

[0370] As shown in Figure 12 , the third device 1200 provided in an embodiment of the present disclosure includes: at least one processor 1201, a memory 1202, a user interface 1203, and at least one network interface 1204. The various components in the third device 1200 are coupled together via a bus system 1205. It will be appreciated that the bus system 1205 is used to enable connectivity and communication between these components. In addition to a data bus, the bus system 1205 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in Figure 12 , all of these buses are labeled as the bus system 1205.

[0371] The user interface 1203 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0372] The memory 1202 in the embodiment of the present disclosure is used to store various types of data to support the operation of the third device 1200. Examples of such data include: any computer program used to operate on the third device 1200.

[0373] The deregistration method for a passive IoT device applied to a third device 1200 disclosed in the embodiments of this disclosure can be applied to or implemented by processor 1201. Processor 1201 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the deregistration method for a passive IoT device applied to the third device 1200 can be performed by hardware integrated logic circuits or software instructions within processor 1201. The processor 1201 may be a general-purpose processor, a DSP, or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Processor 1201 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of this disclosure for use with the third device. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this disclosure can be directly executed by a hardware decoding processor or by a combination of hardware and software modules within the decoding processor. The software module can be located in a storage medium, which is located in the memory 1202. The processor 1201 reads the information in the memory 1202 and combines its hardware to complete the steps of the deregistration method for a passive Internet of Things device applied to the third device 1200 provided in the embodiment of the present disclosure.

[0374] In an exemplary embodiment, the third device 1200 may be implemented by one or more ASICs, DSPs, PLDs, CPLDs, FPGAs, general-purpose processors, controllers, MCUs, Microprocessors, or other electronic components to perform the aforementioned deregistration method for a passive IoT device applied to the third device 1200.

[0375] Furthermore, the third device includes a passive Internet of Things device, or at least one of a cellular passive management network element and a UDM network element.

[0376] Furthermore, if the first device is a UDM network element or a passive Internet of Things server and the second device is a cellular passive management network element, correspondingly, the third device is a passive Internet of Things device; if the first device is a passive Internet of Things device and the second device is a reader / writer, correspondingly, the third device includes at least one of a cellular passive management network element and a UDM network element.

[0377] It is understood that memories 1002, 1102, and 1202 may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Non-volatile memory may include read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); magnetic surface memory may include magnetic disk storage or magnetic tape storage. Volatile memory may include random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memories described in the embodiments of the present disclosure are intended to include, but are not limited to, these and any other suitable types of memories.

[0378] In an exemplary embodiment, the present disclosure further provides a storage medium, namely, a computer storage medium, which may be a computer-readable storage medium. For example, the storage medium may include a memory 1002 storing a computer program, which may be executed by a processor 1001 of a first device to complete the steps of the deregistration method for a passive IoT device according to the embodiment of the present disclosure. For another example, the storage medium may include a memory 1102 storing a computer program, which may be executed by a processor 1101 of a second device to complete the steps of the deregistration method for a passive IoT device according to the embodiment of the present disclosure. For another example, the storage medium may include a memory 1202 storing a computer program, which may be executed by a processor 1201 of a third device to complete the steps of the deregistration method for a passive IoT device according to the embodiment of the present disclosure. The computer-readable storage medium may be a memory such as a ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface storage, optical disk, or CD-ROM.

[0379] In an exemplary embodiment, the present disclosure also provides a computer program product, including a computer program, which can be executed by the processor 1001 of the first device, the processor 1101 of the second device, or the processor 1201 of the third device to complete the steps described in the method of the embodiment of the present disclosure.

[0380] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0381] In addition, the technical solutions described in the embodiments of the present disclosure can be arbitrarily combined without conflict.

[0382] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A method for deregistering a passive IoT device, applied to a first device, the method comprising: Get the trigger conditions for performing the deregistration operation of the passive IoT device; as well as If it is determined that the trigger condition is met, sending the first information to the second device; The first information is used to request the deregistration operation of the passive Internet of Things device, and the first information carries at least the identification information of the passive Internet of Things device.

2. The deregistration method according to claim 1, wherein: The first device is a unified data management function (UDM) network element, the second device is a cellular passive management network element, and the method further includes: receiving a first response message sent by the second device, where the first response message carries identification information and deregistration instruction information of the passive Internet of Things device; and Based on the first response information, clear the stored first related information; The first relevant information includes the contract information of the passive Internet of Things device.

3. The deregistration method according to claim 1, wherein: The first device is a passive Internet of Things server, the second device is a cellular passive management network element, and the method further includes: receiving first response information sent by the second device, where the first response information carries at least identification information and deregistration instruction information of the passive Internet of Things device; and Based on the first response information, clear the stored second related information; The second relevant information includes registration information of the passive Internet of Things device.

4. The deregistration method according to claim 1, wherein: The first device is the passive IoT device, the second device is a reader / writer, and if it is determined that the trigger condition is met, sending the first information to the second device includes: receiving a passive Internet of Things instruction sent by the second device; and If it is determined that the trigger condition is met, sending the first information to the second device based on the passive Internet of Things instruction; The first information also carries registration request information.

5. The deregistration method according to claim 4, further comprising: receiving a second message carrying deregistration instruction information sent by the second device; as well as Based on the second information, the state of the passive Internet of Things device is changed to a deregistered state.

6. The deregistration method according to claim 1, wherein: The first device is the passive IoT device, the second device is a reader / writer, and if it is determined that the trigger condition is met, sending the first information to the second device includes: If it is determined that the trigger condition is met, changing the state of the passive IoT device to a deregistered state; receiving a passive Internet of Things instruction sent by the second device; and Based on the passive Internet of Things instruction, sending the first information to the second device; The first information also carries status change indication information.

7. The deregistration method according to claim 1, wherein: If the first device is a UDM network element, the trigger condition includes one or more of the following conditions: the contracted service time of the passive Internet of Things device in the UDM network element expires and registration update indication information of the passive Internet of Things device is received; If the first device is a passive Internet of Things server, the trigger condition includes at least one or more of the following conditions: the registration time of the passive Internet of Things device with the passive Internet of Things server expires and active deregistration instruction information of the passive Internet of Things device is received; If the first device is the passive Internet of Things device, the trigger condition includes one or more of the following conditions: the contract service time of the passive Internet of Things device in the UDM network element expires, the registration time of the passive Internet of Things device in the passive Internet of Things server expires, and the physical location of the passive Internet of Things device changes.

8. A method for deregistering a passive IoT device, applied to a second device, the method comprising: Receive first information sent by a first device, where the first information is used to request a deregistration operation of the passive Internet of Things device, and the first information carries at least identification information of the passive Internet of Things device; as well as Based on the first information, sending third information to a third device; Among them, the third information carries at least the identification information of the passive Internet of Things device.

9. The deregistration method according to claim 8, wherein: The first device is a UDM network element or a passive Internet of Things server, the second device is a cellular passive management network element, and the third device is a passive Internet of Things device; The sending, based on the first information, third information to the third device includes: Based on the identification information of the passive Internet of Things device carried in the first information, obtain service context information of the passive Internet of Things device, where the service context information is stored in the second device and includes at least identification information of a radio access network (RAN) network element serving the passive Internet of Things device; and Send the third information to the RAN network element; wherein the RAN network element is used to send the third information to the third device via the reader / writer serving the passive Internet of Things device based on the identification information of the passive Internet of Things device, and the third information also carries deregistration indication information.

10. The deregistration method according to claim 9, further comprising: receiving second response information sent by the third device; Based on the second response information, clear the stored third related information; as well as Based on the second response information, sending a first response information to the UDM network element or the passive Internet of Things server; Among them, the second response information carries the identification information and state change indication information of the passive Internet of Things device; the first response information carries the identification information and deregistration indication information of the passive Internet of Things device; and the third relevant information includes the service context information.

11. The deregistration method according to claim 8, wherein: The first device is a passive Internet of Things device, the second device is a reader / writer, and the third device is a UDM network element and a cellular passive management network element; The sending, based on the first information, third information to the third device includes: Based on the first information, sending third information to a third device via the RAN network element serving the passive IoT device; The third information also carries identification information of the reader / writer; the third information also carries deregistration request information or status change indication information.

12. The deregistration method according to claim 11, further comprising: receiving at least one of third response information and fourth response information sent by the third device; If it is determined that at least one of the third response information and the fourth response information carries the deregistration instruction information, sending a second message carrying the deregistration instruction information to the first device based on at least one of the third response information and the fourth response information; The third response information is the response information of the third information sent by the UDM network element, and the fourth response information is the response information of the third information sent by the cellular passive management network element.

13. A method for deregistering a passive IoT device, applied to a third device, the method comprising: receiving third information sent by the second device; as well as Based on the third information, performing a deregistration operation of the passive IoT device; Among them, the third information carries at least the identification information of the passive Internet of Things device.

14. The deregistration method according to claim 13, wherein: The second device is a cellular passive management network element, and the third device is a passive Internet of Things device; and performing a deregistration operation of the passive Internet of Things device based on the third information includes: Based on the third information, changing the state of the passive IoT device to a deregistered state; and Sending second response information to the second device; The third information also carries deregistration indication information, and the second response information carries identification information and state change indication information of the passive Internet of Things device.

15. The deregistration method according to claim 13, wherein: The second device is a reader / writer, and the third device is a UDM network element; performing a passive IoT device deregistration operation based on the third information includes: Based on the third information, clearing the stored first related information; and Sending third response information to the second device; Among them, the third response information is the response information of the third information, and the first relevant information includes the contract information of the passive Internet of Things device; if the third information carries the deregistration request information, then the third response information carries the deregistration indication information.

16. The deregistration method according to claim 13, wherein: The second device is a reader / writer, and the third device is a passive cellular management network element; performing the deregistration operation based on the third information includes: Based on the third information, clearing the stored third related information; sending information representing a fourth response to the second device; and Based on the third information, sending fourth information to the passive Internet of Things server; Among them, the fourth response information is the response information of the third information, and the third related information includes the service context information of the passive Internet of Things device; the fourth information carries the identification information and deregistration indication information of the passive Internet of Things device; if the third information carries the deregistration request information, then the fourth response information carries the deregistration indication information.

17. A first device comprising: A processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, performs the steps of the method according to any one of claims 1 to 7.

18. A second device comprising: A processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, performs the steps of the method according to any one of claims 8 to 12.

19. A third device comprising: A processor and a memory for storing a computer program that can be run on the processor, wherein the processor, when running the computer program, performs the steps of the method according to any one of claims 13 to 16.

20. A storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 16 are implemented.

21. A computer program product comprising a computer program, wherein When the computer program is executed by a processor, the computer program implements the steps of the method according to any one of claims 1 to 16.

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