Information transmission method and device, core network equipment and terminal equipment

Abstract

The invention provides an information transmission method and device, core network equipment and terminal equipment, and belongs to the field of communication, and the information transmission method provided by the embodiment of the invention comprises the steps that first core network equipment receives a first message, and the first message is used for triggering the first core network equipment to page the terminal equipment through a first network; and the first core network device sends first information to the terminal device through a second core network device, the first information being used for triggering the terminal device to enter a connected state in the first network, or the first information being used for reminding a user. The method can improve the reliability of data transmission and the user experience.

Description

Technical Field

[0001] This application relates to the field of communications, and more particularly, to an information transmission method, apparatus, core network device, and terminal device. Background Art

[0002] In some scenarios, the terminal may not successfully receive a paging message, resulting in missed calls or missed data, which affects the user experience. For example, in the New Radio Non-Terrestrial Network (NR NTN) scenario, there is no retransmission mechanism for paging messages in NR NTN, which may cause the terminal device to fail to successfully receive a paging message; or, the signal received by the terminal is very weak, which may cause the terminal device to fail to successfully parse a paging message.

[0003] Therefore, there is a need in the art to provide an information transmission method to improve the reliability of data transmission and the user experience. Summary of the Invention

[0004] Embodiments of this application provide an information transmission method, apparatus, core network device, and terminal device, which can improve the reliability of data transmission and the user experience.

[0005] In a first aspect, an information transmission method is provided, which is executed by a first core network device. The method includes:

[0006] The first core network device receives a first message, where the first message is used to trigger the first core network device to page a terminal device through a first network;

[0007] The first core network device sends first information to the terminal device through a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind the user.

[0008] In a second aspect, an information transmission method is provided, which is executed by a terminal device. The method includes:

[0009] The terminal device receives first information through a second network, where the first information is used to trigger the terminal device to enter a connected state in a first network, or the first information is used to remind the user.

[0010] In a third aspect, an information transmission apparatus is provided, which is characterized by including:

[0011] A receiving unit, configured to receive a first message, where the first message is used to trigger a first core network device to page a terminal device through a first network;

[0012] A sending unit, configured to send first information to the terminal device via a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

[0013] In a fourth aspect, there is provided an information transmission device, characterized by comprising:

[0014] A receiving unit, configured to receive first information via a second network, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

[0015] In a fifth aspect, there is provided a core network device, where the core network device includes a processor and a memory, the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the first aspect are implemented.

[0016] In a sixth aspect, there is provided a core network device, including a processor and a communication interface, where the communication interface is configured to:

[0017] Receive a first message, where the first message is used to trigger the first core network device to page the terminal device via a first network;

[0018] Send first information to the terminal device via a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

[0019] In a fifth aspect, there is provided a terminal device, where the terminal device includes a processor and a memory, the memory stores a program or instructions that can run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0020] In a seventh aspect, there is provided a terminal device, including a processor and a communication interface, where the communication interface is configured to receive first information via a second network, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

[0021] In an eighth aspect, there is provided a readable storage medium, where a program or instructions are stored on the readable storage medium, and when the program or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0022] In a tenth aspect, there is provided a wireless communication system, including: a terminal device and a core network device, where the core network device can be configured to execute the steps of the method described in the first aspect, and the terminal device can be configured to execute the steps of the method described in the second aspect.

[0023] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface. The communication interface is coupled to the processor, and the processor is configured to run programs or instructions to implement the method described in the first aspect or the method described in the second aspect.

[0024] In the twelfth aspect, a computer program / program product is provided. The computer program / program product is stored in a storage medium, and the program / program product is executed by at least one processor to implement the steps of the method described in the first aspect or the steps of the method described in the second aspect.

[0025] In an embodiment of the present application, a first core network device receives a first message, which is used to trigger the first core network device to page a terminal device through a first network; the first core network device sends first information to the terminal device through a second core network device, and the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind the user. Equivalently, even if the first core network device cannot page the terminal device through the first network, it is possible to make the terminal device enter a connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a block diagram of a wireless communication system to which the embodiments of the present application can be applied.

[0028] Figure 2 is a schematic diagram of a paging process provided by an embodiment of the present application.

[0029] Figure 3 is a schematic flowchart of an information transmission method provided by an embodiment of the present application.

[0030] Figure 4 is a schematic flowchart of another information transmission method provided by an embodiment of the present application.

[0031] Figure 5 is a schematic flowchart of an address acquisition method provided by an embodiment of the present application.

[0032] Figure 6It is a schematic flowchart of another address acquisition method provided by an embodiment of the present application.

[0033] Figure 7 It is a schematic flowchart of another address acquisition method provided by an embodiment of the present application.

[0034] Figure 8 It is a schematic block diagram of an information transmission device provided by an embodiment of the present application.

[0035] Figure 9 It is a schematic block diagram of another information transmission device provided by an embodiment of the present application.

[0036] Figure 10 It is a schematic block diagram of a communication device provided by an embodiment of the present application.

[0037] Figure 11 It is a schematic block diagram of a core network device provided by an embodiment of the present application.

[0038] Figure 12 It is a schematic block diagram of a terminal device provided by an embodiment of the present application. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0040] The terms "first", "second", etc. in the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "or" in the present application means at least one of the connected objects. For example, "A or B" covers three scenarios, namely, Scenario 1: including A and not including B; Scenario 2: including B and not including A; Scenario 3: including both A and B. The character " / " generally indicates an "or" relationship between the associated objects before and after.

[0041] The term "indication" in this application can be either a direct indication (or an explicit indication) or an indirect indication (or an implicit indication). Among them, a direct indication can be understood as that the sender clearly informs the receiver of specific information, operations to be performed, request results, etc. in the sent indication; an indirect indication can be understood as that the receiver determines the corresponding information according to the indication sent by the sender, or makes a judgment and determines the operations to be performed or request results, etc. according to the judgment result.

[0042] It should be noted that the technology described in the embodiments of this application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), or other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes the New Radio (NR) system for example purposes, and uses NR terms in most of the following descriptions, but these technologies can also be applied to systems other than the NR system, such as the 6th Generation (6G) communication system. th Generation, 6G) communication system.

[0043] Figure 1 A block diagram of a wireless communication system to which the embodiments of this application can be applied is shown.

[0044] As Figure 1 shown, the wireless communication system includes a terminal 11 and a network-side device 12.

[0045] Among them, the terminal 11 can be a mobile phone, a tablet personal computer, a laptop computer, a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR) device, a virtual reality (VR) device, a robot, a wearable device, a flight vehicle, a vehicle user equipment (VUE), a shipborne device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication functions, such as refrigerators, TVs, washing machines, or furniture, etc.), a game console, a personal computer (PC), an ATM, or a self-service machine, etc., which are terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart earphones, smart glasses, smart jewelry (such as smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle chains, etc.), smart wristbands, smart clothing, etc. Among them, vehicle user equipment can also be referred to as vehicle terminals, vehicle controllers, vehicle modules, vehicle components, vehicle chips, or vehicle units, etc. In addition to the above terminal devices, it can also be a chip inside the terminal, such as a modem chip or a system on chip (SoC). It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application.

[0046] The network-side device 12 can include an access network device or a core network device.

[0047] Among them, the access network device may also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device may include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc. Among them, the base station may be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home Node B (HNB), home evolved Node B, Transmission Reception Point (TRP), or some other suitable term in the art. As long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiments of this application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0048] The core network device may include, but is not limited to, at least one of the following: core network nodes, core network functions, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.but not limited to at least one of the following: core network node, core network function, Mobility Management Entity (MME), Access and Mobility Management Function (AMF), Session Management Function (SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (L-NEF), Binding Support Function (BSF), Application Function (AF), Short Message Service Function (SMSF), Short Message Service Center (SC), Short Message Service (SMS), interworking MSC for short message service (IWMSC), Equipment Identity Register (EIR), IP Multimedia Subsystem Application Server (IMS AS), etc. It should be noted that in the embodiments of this application, only the core network devices in the NR system are taken as examples for introduction, and the specific types of core network devices are not limited.

[0049] For better understanding of the embodiments of the present application, the related technologies of the present application will be described.

[0050] Figure 2 It is a schematic diagram of the paging process 200 provided by the embodiments of the present application.

[0051] As Figure 2 shown, the paging process 200 of the terminal device in the 5G network may include:

[0052] S201, the UPF receives the downlink data sent to the terminal device.

[0053] S202, the UPF sends a data notification message to the SMF, and the data notification message is used to notify the SMF that there is downlink data that needs to be sent to the terminal device.

[0054] S203, the SMF sends a request message to the AMF, and the request message is used to request to send downlink data to the terminal device, and the request message may be a Namf_Communication_N1N2MessageTransfer message.

[0055] S204, the AMF sends a paging message to all base stations (gNBs) in the area where the terminal device is located.

[0056] S205, all base stations in the area where the terminal device is located send paging messages to page the terminal device within their coverage area.

[0057] However, in some scenarios, the terminal may not be able to successfully receive the paging message, resulting in missed calls or missed data, affecting the user experience. For example, in the New Radio Non-Terrestrial Network (NR NTN) scenario of the 5th Generation Mobile Communication Technology (5G), due to the lack of a retransmission mechanism for paging messages in NR NTN, the terminal device may not be able to successfully receive the paging message, resulting in missed calls or missed data, affecting the user experience; or, the signal received by the terminal is very weak, which may cause the terminal device to be unable to successfully parse the paging message, resulting in missed calls or missed data, affecting the user experience.

[0058] In view of this, the embodiments of the present application provide an information transmission method, device, core network device, and terminal device, which can improve the reliability of data transmission and the user experience.

[0059] The following will describe in detail the information transmission provided by the embodiments of the present application with reference to the accompanying drawings and through some embodiments and their application scenarios.

[0060] Figure 3 It is a schematic flowchart of an information transmission method 300 according to an embodiment of the present application.

[0061] As Figure 3 shown, the information transmission method 300 may include at least some of the following:

[0062] S301, a first core network device receives a first message, where the first message is used to trigger the first core network device to page a terminal device through a first network.

[0063] Exemplarily, the first core network device may be an AMF or a device with AMF function.

[0064] Exemplarily, the first message may be a request message, and the request message is used to request to send downlink data to the terminal device.

[0065] S302, the first core network device sends first information to the terminal device through a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

[0066] Exemplarily, the first core network device may directly send the first information to the terminal device through the second core network device after receiving the first message; or, after receiving the first message, the first core network device may first send a paging message to all base stations in the area where the terminal device is located, and send the first information to the terminal device through the second core network device when the sending condition of the first information is met.

[0067] Exemplarily, the second core network device may be an SMSF or a device with SMSF function.

[0068] Exemplarily, the first information for reminding the user includes but is not limited to at least one of the following: the first information may be used to remind the user to enter a connected state in the first network, the first information may be used to remind the user that the first network is paging the terminal device, the first information may be used to remind the user that there is downlink data, the first information may be used to remind the user that there is an incoming call, the first information may be used to remind the user that there is a short message, the first information may be used to remind the user to align with the first network, the first information may be used to remind the user to align with the orientation or direction where the access network device of the first network is located.

[0069] Exemplarily, if the first information is used to trigger the terminal device to enter a connected state in the first network, after receiving the first information, the terminal device enters a connected state in the first network through the first information.

[0070] Exemplarily, if the first information is used to trigger the terminal device to enter the connected state in the first network, the terminal device may not display the first information to the user.

[0071] Exemplarily, if the first information is used to remind the user, the terminal device may display the first information to the user.

[0072] It should be noted that the user here is the user who uses or operates the terminal device.

[0073] In this embodiment, the first core network device sends the first information to the terminal device through the second core network device. The first information is used to trigger the terminal device to enter the connected state in the first network, or the first information is used to remind the user. Equivalently, even if the first core network device cannot page the terminal device through the first network, it can still enable the terminal device to enter the connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience.

[0074] In some embodiments, S302 may include:

[0075] When the first condition is met, the first core network device sends the first information to the terminal device through the second core network device;

[0076] Wherein, the first condition includes at least one of the following:

[0077] After the first core network device sends a paging message to the terminal device through the first network, it does not receive a non-access stratum (NAS) message sent by the terminal device within a predetermined time period;

[0078] The first core network device predicts that the terminal device cannot receive the paging message;

[0079] The radio access technology of the first network is a specific radio access technology.

[0080] Exemplarily, the predetermined time period may be a time period agreed upon by the protocol, or rather, the predetermined time period may be information stored by the first core network device. Or, the predetermined time period may be a time period configured by other devices, or rather, the predetermined time period may be a time period obtained or received by the first core network device from other devices.

[0081] Exemplarily, when the radio access technology of the first network is a specific radio access technology, it can be determined that the first core network device predicts that the terminal device cannot receive the paging message. For example, when the technical parameters adopted by the radio access technology of the first network are specific values, it can be determined that the radio access technology of the first network is a specific radio access technology, and further it can be determined that the first core network device predicts that the terminal device cannot receive the paging message. The technical parameters include, but are not limited to, at least one of the following: operating frequency band, transmission mode, modulation method, protocol standard, etc.

[0082] Exemplarily, the first core network device predicting that the terminal device cannot receive the paging message includes: the probability that the first core network device predicts that the terminal device cannot receive the paging message is greater than or equal to a preset threshold.

[0083] In some embodiments, the first information includes at least one of the following: a first address, a second address; wherein, the first address is the Mobile Station International Integrated Services Digital Network Number (MSISDN) corresponding to a first identifier, and the first identifier is the permanent identifier used by the terminal device within the first network; the second address is the MSISDN corresponding to a second identifier, and the second identifier is the permanent identifier used by the terminal device within the second network.

[0084] It should be noted that the MSISDN involved in the present application can also be replaced by a Generic Public Subscription Identifier (GPSI).

[0085] Exemplarily, the first identifier includes, but is not limited to: a Subscription Permanent Identifier (SUPI), an International Mobile Subscriber Identity (IMSI).

[0086] Exemplarily, the second identifier includes, but is not limited to: SUPI, IMSI.

[0087] Exemplarily, the first address and the second address may be the same or different.

[0088] It should be noted that the first address is the address used by the terminal device within the first network, and the second address is the address used by the terminal device within the second network. In other alternative embodiments, the first address or the second address may also be in other forms of addresses, and the present application does not make specific limitations thereto.

[0089] In some embodiments, the method 300 may further include:

[0090] The first core network device obtains second information from the terminal device through the first network; wherein, the second information includes at least one of the following: the second address, indication information, and a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device within the second network.

[0091] Exemplarily, the first core network device receives the second information from the terminal device through the first network.

[0092] Exemplarily, the first core network device may obtain the second address from the terminal device through the first network; alternatively, the first core network device obtains the indication information from the terminal device through the first network and determines the second address based on the indication information; alternatively, the first core network device obtains the third identifier from the terminal device through the first network and obtains the second address based on the third identifier.

[0093] Exemplarily, the third identifier is a temporary identifier assigned by the third core network device to the terminal device when the terminal device registers in the second network, and the third core network device may be an MME or a device with MME function.

[0094] Exemplarily, the third identifier may be a Globally Unique Temporary Identity (GUTI).

[0095] In some embodiments, the second information includes the indication information, and the method 300 may further include:

[0096] The first core network device determines the first address as the second address based on the indication information.

[0097] Exemplarily, since the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, it shows that the terminal device shares one address in the first network and the second network. In this case, the first core network device may directly determine the first address as the second address.

[0098] In some embodiments, the second information includes the third identifier, and the method 300 may further include:

[0099] The first core network device obtains the second address or the second identifier from a third core network device based on the third identifier; the second identifier is used for the first core network device to obtain the second address from a fourth core network device based on the second identifier.

[0100] Exemplarily, after obtaining the third identifier, the first core network device obtains the second address from the third core network device based on the third identifier. For example, after obtaining the third identifier, the first core network device sends a first request to the third core network device, the first request includes the third identifier, and after receiving the first request, the third core network device sends a first response to the first core network device, the first response includes the second address.

[0101] Exemplarily, after obtaining the third identifier, the first core network device obtains the second identifier from a third core network device based on the third identifier, and obtains the second address from the fourth core network device based on the second identifier. For example, after obtaining the third identifier, the first core network device sends a first request to the fourth core network device, the first request includes the third identifier, and after receiving the first request, the fourth core network device sends a first response to the first core network device, the first response includes the second identifier. After receiving the first response, the first core network device sends a second request to the fourth core network device, the second request includes the second identifier, and after receiving the second request, the fourth core network device sends a second response to the first core network device, the second response includes the second address.

[0102] Exemplarily, the third core network device may be an MME or a device with MME functionality.

[0103] Exemplarily, the fourth core network device may be a UDM or a device with UDM functionality.

[0104] In some embodiments, the second information further includes tracking area update (TAU) information; wherein, the first core network device obtaining the second address or the second identifier from the third core network device based on the third identifier may be implemented as:

[0105] The first core network device obtains the second address or the second identifier from the third core network device based on the third identifier and the TAU information.

[0106] Exemplarily, after obtaining the third identifier and the TAU information, the first core network device obtains the second address from the third core network device based on the third identifier and the TAU information. For example, after obtaining the third identifier and the TAU information, the first core network device sends a first request to the third core network device, the first request includes the third identifier and the TAU information, after receiving the first request, the third core network device verifies the TAU information, and in the case of successful verification, sends a first response to the first core network device, the first response includes the second address.

[0107] Of course, in other alternative embodiments, the third core network device verifies the TAU information, and in the case of unsuccessful verification, may also send a first response to the first core network device, the first response includes the second identifier, so that the first core network device can obtain the second address from the fourth core network device based on the second identifier.

[0108] Exemplarily, after obtaining the third identifier and the TAU information, the first core network device obtains the second identifier from the third core network device based on the third identifier and the TAU information, and obtains the second address from the fourth core network device based on the second identifier. For example, after obtaining the third identifier and the TAU information, the first core network device sends a first request to the fourth core network device, the first request includes the third identifier and the TAU information, after receiving the first request, the fourth core network device verifies the TAU information, and in the case of successful verification, sends a first response to the first core network device, the first response includes the second identifier. After receiving the first response, the first core network device sends a second request to the fourth core network device, the second request includes the second identifier, after receiving the second request, the fourth core network device sends a second response to the first core network device, the second response includes the second address.

[0109] In some embodiments, the second information is carried in at least one of the following messages:

[0110] Registration message, uplink NAS message, service request message.

[0111] Of course, in other alternative embodiments, the second information may be carried in any message sent by the terminal device to the first core network device, and the present application does not make specific limitations thereon.

[0112] In some embodiments, the method 300 may further include:

[0113] The first core network device obtains the subscription information of the terminal device from the fourth core network device, and the subscription information includes the second address.

[0114] Exemplarily, the first core network device sends a subscription information request to the fourth core network device. After receiving the subscription information request, the fourth core network device sends a subscription information response to the first core network device, and the subscription information response includes the second address.

[0115] In some embodiments, the first core network device obtaining the subscription information of the terminal device from the fourth core network device can be implemented as:

[0116] During the registration process of the terminal device in the first network, the first core network device obtains the subscription information from the fourth core network; wherein, the fourth core network device is used to obtain the second address from the terminal device through the fifth core network device before the registration process.

[0117] Exemplarily, during the registration process of the terminal device in the first network, the first core network device sends a subscription information request to the fourth core network device. After receiving the subscription information request, the fourth core network device sends a subscription information response to the first core network device, and the subscription information response includes the second address.

[0118] Exemplarily, the fourth core network device obtains an address configuration request from the terminal device through the fifth core network device before the registration process, and the address configuration request is used to request the configuration of the second address.

[0119] Exemplarily, the fourth core network device may be a UDM or a device with UDM function.

[0120] Exemplarily, the fifth core network device may be an IMS AS or a device with IMS AS function.

[0121] In some embodiments, the first information is a short message, the first address is the original address of the short message, and the second address is the destination address of the short message.

[0122] Of course, in other alternative embodiments, the first information may also be any message or information in the message that can be sent to the terminal device through the second core network device, and the present application does not make specific limitations thereto.

[0123] In some embodiments, S302 may include:

[0124] The first core network device sends the first information to the terminal device through the second core network device and the second network.

[0125] Exemplarily, the first core network device sends the first information to the terminal device through the second core network device and the access network device in the second network.

[0126] In some embodiments, the first network is a New Radio Non-Terrestrial Network (NR NTN), and the second network is a Narrow Band Internet of Things (NB IOT); alternatively, the first network is the 5th generation mobile communication technology (5G), and the second network is the 4th generation mobile communication technology (4G); alternatively, the first network is the 6th generation mobile communication technology (6G), and the second network is 4G; alternatively, the first network is 6G, and the second network is 5G.

[0127] It should be understood that the solution provided in this application can also be extended to any applicable scenario where the second network helps the first network enter the connected state or reminds the user through the second network. For example, taking the scenario of terrestrial 5G + 4G (i.e., the first network is terrestrial 5G and the second network is terrestrial 4G) as an example, if the 5G signal is poor somewhere on the ground, the first information can be sent to the terminal device through the 4G network to trigger the terminal device to enter the connected state in 5G or remind the user. Again, the second network can be a Narrow Band Internet of Things (NB IOT) or a terrestrial network 4G (TN 4G) network; the first network can be a terrestrial network 5G (TN 5G), etc.

[0128] The technical solution of this application will be described below through Embodiment 1 - Embodiment 4.

[0129] Embodiment 1:

[0130] In this embodiment, taking the first network as NR-NTN and the second network as NB-NTN as an example, the information transmission method provided in this application is described in combination with the paging process of the terminal device.

[0131] Figure 4 It is a schematic flowchart of another information transmission method 410 provided by an embodiment of this application.

[0132] As Figure 4 shown, the information transmission method 410 may include:

[0133] S411, the UPF receives the downlink data sent to the terminal device.

[0134] S412, the UPF sends a data notification message to the SMF, and the data notification message is used to notify the SMF that there is downlink data that needs to be sent to the terminal device.

[0135] S413. The SMF sends a request message to the AMF. The request message is used to request to send downlink data to the terminal device, and the request message can be a Namf_Communication_N1N2MessageTransfer message.

[0136] S414. The AMF sends a paging message to all base stations (gNBs) within the area where the terminal device is located.

[0137] S415. All base stations within the area where the terminal device is located send a paging message to page the terminal device within its coverage area.

[0138] S416. The AMF generates the first information.

[0139] Exemplarily, the first information is used to trigger the terminal device to enter the connected state in NR-NTN, or the first information is used to remind the user. The first information being used to remind the user includes, but is not limited to: the first information can be used to remind the user that the terminal device enters the connected state in NR-NTN, the first information can be used to remind the user that NR-NTN is paging the terminal device, the first information can be used to remind the user to align with NR-NTN, and the first information can be used to remind the user to align with the orientation or direction where the access network device of NR-NTN is located. The access network device of NR-NTN can be a satellite device.

[0140] Exemplarily, the AMF can trigger the process of generating a short message according to the following conditions:

[0141] Condition 1: After the AMF sends a paging message through NR NTN, it does not receive a NAS message sent by the terminal device within a predetermined time period.

[0142] Condition 2: The AMF anticipates that the terminal device cannot receive or is very likely not to receive the paging message.

[0143] Condition 3: The AMF determines that the access technology of the terminal device is NR NTN.

[0144] Exemplarily, the first information includes a source address and a destination address. The source address is the MSISDN corresponding to the IMSI or SUPI used by the terminal device in NR NTN. The destination address is the MSISDN corresponding to the IMSI or SUPI used by the terminal device in NB NTN.

[0145] It should be noted that NB NTN can also be IOT NTN or NB IOT NTN.

[0146] Among them, the destination address can be determined by any one of the following methods:

[0147] Method 1:

[0148] When the terminal device registers in NR NTN, it can carry at least one of the following information in the registration message:

[0149] The target address;

[0150] The indication information, which is used to indicate that the terminal device supports one number for multiple terminals or supports multiple registrations;

[0151] The temporary identifier used by the terminal device in NB NTN, such as GUTI.

[0152] If the terminal device can carry the indication information in the registration message when registering in NR NTN, the AMF can directly determine the source address of the first information as the destination address.

[0153] If the terminal device can carry the temporary identifier used by the terminal device in NB NTN, such as GUTI, in the registration message when registering in NR NTN, the AMF can obtain the destination address from the MME based on the GUTI, or the AMF can obtain the permanent identifier used by the terminal device in NB NTN, such as IMSI or SUPI, from the MME based on the GUTI, and then obtain the destination address from the UDM based on the IMSI or SUPI.

[0154] Method 2:

[0155] The AMF obtains the destination address from the subscription information.

[0156] It should be noted that the phone cards in the terminal device can be divided into three cases:

[0157] Case 1:

[0158] The terminal device can be configured with 2 independent SIM cards. These 2 SIM cards each have their own MSISDN, and the MSISDN of one of the 2 SIM cards corresponds to a unique identifier in NR NTN, and the MSISDN of the other SIM card in the 2 SIM cards corresponds to a unique identifier in NB NTN. The corresponding unique identifier can be IMSI or SUPI.

[0159] Case 2:

[0160] The terminal device can be configured with 2 independent SIM cards. These 2 SIM cards use a common MSISDN, and this common MSISDN corresponds to a unique identifier in NR NTN and a unique identifier in NB NTN. The corresponding unique identifier can be IMSI or SUPI. This feature can also be referred to as the terminal device supporting one number for multiple terminals, or one number for multiple SIMs or one number for multiple cards.

[0161] Case 3:

[0162] The terminal device can be configured with one SIM card. This SIM card uses one MSISDN, and this MSISDN corresponds to a unique identifier in the NR NTN and a unique identifier in the NB NTN. The corresponding unique identifier can be an IMSI or a SUPI. This feature can also be referred to as the terminal device supporting dual registration, multiple registration, dual steer, or multiple steer.

[0163] Thus, for Cases 1, 2, and 3, the terminal device will correspond to a unique identifier in the NR NTN, which can also be referred to as the permanent identifier used by the terminal device in the NR NTN. For example, this permanent identifier can be an IMSI or a SUPI. The terminal device will correspond to a unique identifier in the NB NTN, which can also be referred to as the permanent identifier used by the terminal device in the NB NTN. For example, this permanent identifier can be an IMSI or a SUPI. Taking the IMSI as an example, the permanent identifier used by the terminal device in the NR NTN can be denoted as IMSI-1, and the permanent identifier used by the terminal device in the NB NTN can be denoted as IMSI-2.

[0164] S417, the AMF sends the first information to the SMSF.

[0165] S418, the SMSF sends the first information to the SMS-IWMSC / SC.

[0166] S419, the SMS-IWMSC / SC routes it to the terminal device through the NB NTN according to the second address in the first information.

[0167] S4110, the terminal device enters the connected state according to the first information.

[0168] Exemplarily, the terminal device enters the connected state in the NR NTN according to the first information.

[0169] It should be noted that if the first information is used to trigger the terminal device to enter the connected state in the first network, after receiving the first information, the terminal device is triggered by the first information to enter the connected state in the first network. If the first information is used to trigger the terminal device to enter the connected state in the first network, the terminal device may not display the first information. If the first information is used to remind the user, the terminal device may display the first information to the user.

[0170] In this embodiment, the AMF sends the first information to the terminal device through the SMSF. Based on this, even if the AMF cannot page the terminal device through NR-NTN, the first information can be used to enable the terminal device to enter the connected state in NR-NTN or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience.

[0171] Of course, Figure 4 This is only an example of the present application and should not be construed as a limitation of the present application.

[0172] For example, in other alternative embodiments, the AMF can also obtain the target address, indication information, or the temporary identifier used by the terminal device in NB NTN through an uplink NAS message, a service request message, or other information. The present application does not make specific limitations in this regard.

[0173] Embodiment 2:

[0174] In this embodiment, assume that the first network is NR-NTN, the second network is NB-NTN, the permanent identifier used by the terminal device when it is in the registered state in NRNTN is denoted as IMSI-1, and the permanent identifier used by the terminal device when it is in the registered state in NB NTN is denoted as IMSI-2. Then, the AMF can obtain or determine the target address, that is, the MSISDN corresponding to IMSI-2, through the information carried in the registration message.

[0175] Figure 5 It is a schematic flowchart of an address acquisition method 420 provided by an embodiment of the present application.

[0176] As Figure 5 shown, the address acquisition method 420 may include:

[0177] S421, the terminal device sends a registration message to the AMF, which includes a destination address or indication information.

[0178] When the terminal device registers in NR-NTN, the terminal device can send a registration message to the AMF and carry at least one of the following information in the registration message:

[0179] The destination address, that is, the MSISDN corresponding to IMSI-2;

[0180] The indication information, which is used to indicate that the terminal device supports one number for multiple terminals or supports multiple registrations.

[0181] Exemplarily, the indication information indicating that the terminal device supports one number for multiple terminals can also be understood as: the indication information is used to indicate that the terminal device supports dual registration, multiple registration, dual transmission, or multiple transmission.

[0182] S422, the AMF obtains the MSISDN corresponding to IMSI-2.

[0183] When the information carried by the terminal device in the registration message is the MSISDN corresponding to IMSI-2, the AMF directly obtains the MSISDN corresponding to IMSI-2 from the registration message.

[0184] When the information carried by the terminal device in the registration message is the indication information, the AMF considers that the calling and called addresses of the first information are the same, that is, the original address of the first information can be determined as the destination address, or in other words, the MSISDN corresponding to IMSI-1 can be directly determined as the MSISDN corresponding to IMSI-2.

[0185] S423, the terminal device completes the authentication process.

[0186] S424, perform the registration process of the AMF in the UDM.

[0187] S425, the AMF obtains the subscription information of the terminal device from the UDM.

[0188] S426, the terminal device receives the registration acceptance message sent by the AMF.

[0189] In this embodiment, the AMF can obtain or determine the target address, that is, the MSISDN corresponding to IMSI-2, through the information carried in the registration message, thereby ensuring the transmission reliability of the first information.

[0190] Of course, Figure 5 This is only an example of the present application and should not be construed as a limitation of the present application.

[0191] For example, in other alternative embodiments, the AMF can also obtain the target address or indication information through an uplink NAS message, a service request message, or other information, and the present application does not make specific limitations thereon.

[0192] Embodiment 3:

[0193] In this embodiment, it is assumed that the first network is NR-NTN, the second network is NB-NTN, the permanent identifier used by the terminal device when it is in the registered state in NR-NTN is denoted as IMSI-1, and the permanent identifier used by the terminal device when it is in the registered state in NB-NTN is denoted as IMSI-2. Then, the AMF can request the target address, that is, the MSISDN corresponding to IMSI-2, through the information carried in the registration message.

[0194] Figure 6 It is a schematic flowchart of an address acquisition method 430 provided by an embodiment of the present application.

[0195] As Figure 6 shown, the address acquisition method 430 may include:

[0196] S431, the terminal device sends a registration message to the AMF.

[0197] When the terminal device is registered within NR-NTN, the terminal device can send a registration message to the AMF and carry the temporary identifier used by the terminal device within NB-NTN, such as GUTI, in the registration message. Optionally, the terminal device can also carry TAU information in this registration message.

[0198] S432, the AMF sends a context request message to the MME according to the GUTI.

[0199] Among them, the context request message includes the temporary identifier used by the terminal device within NB-NTN, such as GUTI. Optionally, the context request message includes TAU information, and the TAU information is used by the MME to authenticate the identity of the terminal device.

[0200] After the AMF sends a context request message to the MME according to the GUTI, it can also receive the mobility management context (Mobile Management Context, MM context) sent by the MME. The mobility management context includes the MSISDN corresponding to IMSI-2 or the permanent identifier used by the terminal device within NB-NTN. The permanent identifier used by the terminal device within NB-NTN can be IMSI-2. For example, when the context request message includes TAU information, the MME authenticates the identity of the terminal device based on the TAU information and, in the case of successful authentication, sends the mobility management context to the AMF.

[0201] S433, the AMF obtains the MSISDN corresponding to IMSI-2.

[0202] When the mobility management context includes the MSISDN corresponding to IMSI-2, the AMF directly obtains the MSISDN corresponding to IMSI-2 from the mobility management context.

[0203] When the mobility management context includes IMSI-2, the AMF requests the MSISDN corresponding to IMSI-2 from the UDM based on IMSI-2.

[0204] S433, The terminal device completes the authentication process.

[0205] S434, Execute the registration process of the AMF in the UDM.

[0206] S435, The AMF obtains the subscription information of the terminal device from the UDM.

[0207] S436, The terminal device receives the registration acceptance message sent by the AMF.

[0208] In this embodiment, the AMF can request the target address, that is, the MSISDN corresponding to IMSI-2, from the MME or UDM through the information carried in the registration message, thereby ensuring the transmission reliability of the first information.

[0209] Of course, Figure 6 This is only an example of the present application and should not be construed as a limitation of the present application.

[0210] For example, in other alternative embodiments, the AMF can also obtain the GUTI or TAU information through the uplink NAS message, service request message or other information, and the present application does not make specific limitations on this.

[0211] Embodiment 4:

[0212] In this embodiment, assume that the first network is NR-NTN, the second network is NB-NTN, the permanent identifier used by the terminal device when it is in the registered state in NR-NTN is denoted as IMSI-1, and the permanent identifier used by the terminal device when it is in the registered state in NB-NTN is denoted as IMSI-2. Then the AMF can obtain the target address, that is, the MSISDN corresponding to IMSI-2, from the subscription information.

[0213] Figure 7 It is a schematic flowchart of an address acquisition method 440 provided by an embodiment of the present application.

[0214] As Figure 7 shown, the address acquisition method 440 may include:

[0215] S441, The terminal device sends the MSISDN corresponding to IMSI-2 to the IMS AS.

[0216] For example, the terminal device may send the MSISDN corresponding to IMSI-2 to the IMS AS through the Ut interface. The Ut interface is the interface between the terminal device and the AS. For example, the terminal device may send the MSISDN corresponding to IMSI-2 to the IMS AS through the Ut interface in response to the call forwarding configuration.

[0217] S442, the IMS AS sends the MSISDN corresponding to IMSI-2 to the UDM.

[0218] For example, the IMS AS sends the MSISDN corresponding to IMSI-2 to the HSS+UDM.

[0219] S443, the terminal device sends a registration message to the AMF.

[0220] S444, the terminal device completes the authentication process.

[0221] S445, execute the registration process of the AMF in the UDM.

[0222] S446, the AMF obtains the subscription information of the terminal device from the UDM, which includes the MSISDN corresponding to IMSI-2.

[0223] S447, the AMF saves the MSISDN corresponding to IMSI-2 so that the first information involved above can be sent based on the MSISDN corresponding to IMSI-2 subsequently.

[0224] S448, the terminal device receives the registration acceptance message sent by the AMF.

[0225] In this embodiment, the AMF can obtain the target address, that is, the MSISDN corresponding to IMSI-2, by obtaining the subscription information, thereby ensuring the transmission reliability of the first information.

[0226] It should be understood that Examples 1-4 are introduced by taking the non-ground 5G (i.e., New Radio Non Terrestrial Network (NR-NTN)) + 4G (i.e., Narrow Band Non Terrestrial Network (NB-NTN)) scenario as an example. In other alternative embodiments, the solution provided in this application can also be applied to the ground 5G + 4G situation, and can even be applied to similar scenarios such as 6G + 5G or 6G + 4G. For example, taking the ground 5G + 4G scenario as an example, if the 5G signal is poor somewhere on the ground, the first information is sent to the terminal device through the 4G network to trigger the terminal device to enter the connected state in 5G or to remind the user. In other words, the solution provided in this application can also be extended to any applicable scenario where the second network helps the first network enter the connected state or reminds the user through the second network. For example, the second network can be Narrow Band Internet of Things (NB IOT) or Terrestrial Network 4G (TN 4G) network; the first network can be Terrestrial Network 5G (TN 5G), etc.

[0227] For the information transmission method provided in the embodiments of the present application, the execution subject may be an information transmission device. In the embodiments of the present application, taking the information transmission device executing the information transmission method as an example, the information transmission device provided in the embodiments of the present application is described.

[0228] Figure 8 Fig. shows a schematic block diagram of an information transmission device 500 according to an embodiment of the present application.

[0229] As Figure 8 shown, the information transmission device 500 includes:

[0230] A receiving unit 501, configured to receive a first message, where the first message is used to trigger a first core network device to page a terminal device through a first network;

[0231] A sending unit 502, configured to send first information to the terminal device through a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind the user.

[0232] In some embodiments, the sending unit 502 is specifically configured to:

[0233] Send the first information to the terminal device through the second core network device when a first condition is met;

[0234] Wherein, the first condition includes at least one of the following:

[0235] After the first core network device sends a paging message to the terminal device through the first network, it does not receive a non-access stratum (NAS) message sent by the terminal device within a predetermined time duration.

[0236] The first core network device predicts that the terminal device cannot receive the paging message.

[0237] The radio access technology of the first network is a specific radio access technology.

[0238] In some embodiments, the first information includes at least one of the following: a first address, a second address.

[0239] Wherein, the first address is a mobile station international integrated services digital network number (MSISDN) corresponding to a first identifier, and the first identifier is a permanent identifier used by the terminal device within the first network.

[0240] The second address is an MSISDN corresponding to a second identifier, and the second identifier is a permanent identifier used by the terminal device within a second network.

[0241] In some embodiments, the receiving unit 501 is further configured to:

[0242] Obtain second information from the terminal device through the first network.

[0243] Wherein, the second information includes at least one of the following: the second address, indication information, a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device within the second network.

[0244] In some embodiments, the second information includes the indication information, and the receiving unit 501 is further configured to:

[0245] Determine the first address as the second address based on the indication information.

[0246] In some embodiments, the second information includes the third identifier, and the receiving unit 501 is further configured to:

[0247] Obtain the second address or the second identifier from a third core network device based on the third identifier; the second identifier is used by the first core network device to obtain the second address from a fourth core network device based on the second identifier.

[0248] In some embodiments, the second information further includes tracking area update (TAU) information.

[0249] Wherein, the receiving unit 501 is specifically configured to:

[0250] Obtain the second address or the second identifier from the third core network device based on the third identifier and the TAU information.

[0251] In some embodiments, the second information is carried in at least one of the following messages:

[0252] Registration message, uplink non-access stratum NAS message, service request message.

[0253] In some embodiments, the receiving unit 501 is further configured to:

[0254] Obtain the subscription information of the terminal device from a fourth core network device, where the subscription information includes the second address.

[0255] In some embodiments, the receiving unit 501 is specifically configured to:

[0256] During the registration process of the terminal device in the first network, obtain the subscription information from the fourth core network; wherein, the fourth core network device is used to obtain the second address from the terminal device through a fifth core network device before the registration process.

[0257] In some embodiments, the first information is a short message, the first address is the source address of the short message, and the second address is the destination address of the short message.

[0258] In some embodiments, the sending unit 502 is specifically configured to:

[0259] Send the first information to the terminal device through the second core network device and the second network.

[0260] In some embodiments, the first core network device is an Access and Mobility Management Function (AMF).

[0261] In some embodiments, the first network is a New Radio Non-Terrestrial Network (NR NTN), the second network is a Narrowband Internet of Things (NB-IoT); or, the first network is a 5th Generation Mobile Communication Technology (5G), the second network is a 4th Generation Mobile Communication Technology (4G); or, the first network is a 6th Generation Mobile Communication Technology (6G), the second network is 4G; or, the first network is 6G, the second network is 5G.

[0262] In some embodiments, the first information is used to remind the user of at least one of the following:

[0263] The first information is used to remind the user that the first network enters the connected state, the first information is used to remind the user that the first network is paging the terminal device, the first information is used to remind the user that there is downlink data, the first information is used to remind the user that there is an incoming call, the first information is used to remind the user that there is a short message, the first information is used to remind the user to align with the first network, and the first information is used to remind the user of the orientation or direction where the access network device of the first network is located.

[0264] It should be understood that the information transmission device 600 provided in the embodiments of the present application may correspond to the first core network device in the method embodiments of the present application, and the above (or other) operations or functions of each unit in the information transmission device 600 are respectively for implementing Figures 3 to 7 the corresponding processes of the first core network device in the method embodiments shown, and for the sake of brevity, they will not be elaborated here.

[0265] In this embodiment, the information transmission device sends the first information to the terminal device through the second core network device. Even if the first core network device cannot page the terminal device through the first network, it can also enable the terminal device to enter the connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience.

[0266] Figure 9 FIG. shows a schematic block diagram of an information transmission device 600 according to an embodiment of the present application.

[0267] As Figure 9 shown, the information transmission device 600 includes:

[0268] A receiving unit 601, configured to receive the first information through a second network, where the first information is used to trigger the terminal device to enter the connected state in the first network, or the first information is used to remind the user.

[0269] In some embodiments, the first information includes at least one of the following: a first address, a second address;

[0270] Wherein, the first address is a mobile station international integrated services digital network number MSISDN corresponding to a first identifier, and the first identifier is a permanent identifier used by the terminal device in the first network;

[0271] The second address is an MSISDN corresponding to a second identifier, and the second identifier is a permanent identifier used by the terminal device in the second network.

[0272] In some embodiments, the receiving unit 601 is further configured to:

[0273] Send a second piece of information to a first core network device via the first network;

[0274] Wherein, the second piece of information includes at least one of the following: the second address, indication information, and a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device within the second network.

[0275] In some embodiments, the second piece of information further includes tracking area update (TAU) information.

[0276] In some embodiments, the second piece of information is carried in at least one of the following messages:

[0277] Registration message, uplink non-access stratum (NAS) message, service request message.

[0278] In some embodiments, the receiving unit 601 is further configured to:

[0279] Send the second address to the first core network device.

[0280] In some embodiments, the first network is a new radio non-terrestrial network (NR NTN), and the second network is a narrowband Internet of Things (NB-IoT); alternatively, the first network is the fifth-generation mobile communication technology (5G), and the second network is the fourth-generation mobile communication technology (4G); alternatively, the first network is the sixth-generation mobile communication technology (6G), and the second network is 4G; alternatively, the first network is 6G, and the second network is 5G.

[0281] It should be understood that the information transmission device 500 provided in the embodiments of the present application may correspond to the terminal in the method embodiments of the present application, and the above (or other) operations or functions of each unit in the information transmission device 500 are respectively for implementing Figure 4 the corresponding processes executed by the terminal in the method embodiments of the present application. For the sake of brevity, they are not described in detail herein.

[0282] In this embodiment, the information transmission device receives the first information via the second network. Even if the first core network device cannot page the terminal device via the first network, it can enable the terminal device to enter the connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience.

[0283] The information transmission device in the embodiments of the present application may be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or a core network device, or other devices other than terminals. Exemplarily, the terminal may include, but is not limited to, the types of the above-listed terminal 11, the core network device may include, but is not limited to, the types of the core network devices in the above-listed network-side devices 12, and other devices may be servers, Network Attached Storage (NAS), etc. The embodiments of the present application do not make specific limitations.

[0284] The information transmission device provided by the embodiments of the present application can implement Figures 4 to 7 each process involved in the method embodiments shown, and achieve the same technical effects. To avoid repetition, details are not described here again.

[0285] Figure 10 is an example of the communication device 700 provided by the embodiments of the present application.

[0286] As Figure 10 shown, the communication device 700 includes a processor 701 and a memory 702. A program or instruction that can run on the processor 701 is stored on the memory 702. When the program or instruction is executed by the processor 701, each step of the above information transmission method embodiment is implemented. For example, when the communication device 700 is a terminal, when the program or instruction is executed by the processor 701, each step executed by the terminal in the above information transmission method embodiment is implemented, and the same technical effects can be achieved. When the communication device 700 is a core network device, when the program or instruction is executed by the processor 701, each step executed by the first core network device in the above information transmission method embodiment is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again.

[0287] The embodiments of the present application further provide a core network device, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to implement the steps of the method embodiment as Figures 4 to 7 shown. The core network device embodiment corresponds to the above core network device method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to the core network device embodiment, and the same technical effects can be achieved.

[0288] Figure 11 is an example of the core network device 800 provided by the embodiments of the present application.

[0289] As Figure 11As shown, the core network device 800 includes: a processor 801, a network interface 802, and a memory 803. Among them, the network interface 802 is, for example, a common public radio interface (CPRI).

[0290] The core network device 800 according to an embodiment of the present invention may further include: instructions or programs stored on the memory 803 and executable on the processor 801. The processor 801 calls the instructions or programs in the memory 803 to execute Figures 4 to 7 the methods executed by the modules shown, and achieve the same technical effects. To avoid repetition, it will not be described in detail here.

[0291] An embodiment of the present application further provides a terminal, including a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement Figures 4 to 7 the steps in the method embodiment shown. This terminal embodiment corresponds to the above terminal-side method embodiment. Each implementation process and implementation manner of the above method embodiment can be applied to this terminal embodiment, and the same technical effects can be achieved.

[0292] Figure 12 It is a schematic diagram of the hardware structure of a terminal for implementing an embodiment of the present application.

[0293] As Figure 12 shown, the terminal 900 includes, but is not limited to: at least some components such as a radio frequency unit 901, a network module 902, an audio output unit 903, an input unit 904, a sensor 905, a display unit 906, a user input unit 907, an interface unit 906, a memory 909, and a processor 910.

[0294] Those skilled in the art can understand that the terminal 900 may further include a power source (such as a battery) for supplying power to each component. The power source can be logically connected to the processor 910 through a power management system, so as to implement functions such as management of charging, discharging, and power consumption management through the power management system. Figure 12 The terminal structure shown in does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be described in detail here.

[0295] It should be understood that in the embodiments of the present application, the input unit 904 may include a Graphics Processing Unit (GPU) 9041 and a microphone 9042. The graphics processor 9041 processes the image data of static pictures or videos obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 906 may include a display panel 9061, and the display panel 9061 may be configured in the form of, for example, a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes at least one of a touch panel 9071 and other input devices 9072. The touch panel 9071 is also referred to as a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. The other input devices 9072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, which will not be elaborated here.

[0296] In the embodiments of the present application, after receiving downlink data from a network-side device, the radio frequency unit 901 may transmit it to the processor 910 for processing; in addition, the radio frequency unit 901 may send uplink data to the network-side device. Generally, the radio frequency unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, etc.

[0297] The memory 909 can be used to store software programs or instructions as well as various data. The memory 909 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data. Among them, the first storage area can store an operating system, application programs or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 909 can include volatile memory or non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), a static random access memory (SRAM), a dynamic random access memory (DRAM), a synchronous dynamic random access memory (SDRAM), a double data rate synchronous dynamic random access memory (DDR SDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchlink dynamic random access memory (SLDRAM), and a direct rambus random access memory (DRRAM). The memory 909 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0298] The processor 910 may include one or at least two processing units; optionally, the processor 910 integrates an application processor and a modem processor. Among them, the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 910.

[0299] Among them, the radio frequency unit 901 is used to receive first information through a second network, where the first information is used to trigger the terminal device to enter a connected state in a first network, or the first information is used to remind the user.

[0300] In this embodiment, the terminal device receives the first information through the second network. Even if the first core network device cannot page the terminal device through the first network, it can enable the terminal device to enter the connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and the user experience.

[0301] It can be understood that the implementation processes of the implementation methods mentioned in this embodiment can refer to the relevant descriptions of the method embodiments and achieve the same or corresponding technical effects. To avoid repetition, they will not be elaborated here.

[0302] The embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, it realizes each process of the above-mentioned information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0303] Among them, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer-readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disks or optical discs, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0304] The embodiment of the present application also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run a program or instruction to realize each process of the above-mentioned information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0305] It should be understood that the chip mentioned in the embodiment of the present application can also be called a system-on-chip, system chip, chip system or system-on-chip.

[0306] The embodiment of the present application also provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to realize each process of the above-mentioned information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be elaborated here.

[0307] The embodiment of the present application also provides a communication system, including: a terminal and a core network device. The terminal can be used to execute the steps executed by the terminal in the above-mentioned information transmission method, and the core network device can be used to execute the steps executed by the core network device in the above-mentioned information transmission method.

[0308] It should be noted that in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising such element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0309] From the description of the above embodiments, those skilled in the art can clearly understand that the above method-related embodiments can be implemented by means of a computer software product plus a necessary general hardware platform, and of course, can also be implemented by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes several instructions for causing a terminal or a core network device to execute the methods described in the various embodiments of the present application.

[0310] The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms of embodiments without departing from the purpose of the present application and the scope protected by the claims. These embodiments are all within the protection scope of the present application.

Claims

1. An information transmission method, characterized in that, it includes: A first core network device receives a first message, where the first message is used to trigger the first core network device to page a terminal device through a first network; The first core network device sends first information to the terminal device through a second core network device, where the first information is used to trigger the terminal device to enter a connected state in the first network, or the first information is used to remind a user.

2. The method according to claim 1, characterized in that, the first core network device sending the first information to the terminal device through the second core network device includes: When a first condition is met, the first core network device sends the first information to the terminal device through the second core network device; wherein, the first condition includes at least one of the following: After the first core network device sends a paging message to the terminal device through the first network, it does not receive a non-access stratum (NAS) message sent by the terminal device within a predetermined time period; The first core network device predicts that the terminal device cannot receive the paging message; The radio access technology of the first network is a specific radio access technology.

3. The method according to claim 1 or 2, characterized in that, the first information includes at least one of the following: a first address, a second address; wherein, the first address is a mobile station international integrated services digital network number (MSISDN) corresponding to a first identifier, and the first identifier is a permanent identifier used by the terminal device in the first network; The second address is an MSISDN corresponding to a second identifier, and the second identifier is a permanent identifier used by the terminal device in a second network.

4. The method according to claim 3, characterized in that, the method further includes: The first core network device obtains second information from the terminal device through the first network; wherein, the second information includes at least one of the following: the second address, indication information, a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device in a second network.

5. The method according to claim 4, characterized in that, the second information includes the indication information, and the method further includes: The first core network device determines the first address as the second address based on the indication information.

6. The method according to claim 4 or 5, characterized in that, the second information includes the third identifier, and the method further includes: The first core network device obtains the second address or the second identifier from a third core network device based on the third identifier; the second identifier is used for the first core network device to obtain the second address from a fourth core network device based on the second identifier.

7. The method according to claim 6, characterized in that, the second information further includes tracking area update (TAU) information; wherein, the first core network device obtaining the second address or the second identifier from a third core network device based on the third identifier includes: The first core network device obtains the second address or the second identifier from the third core network device based on the third identifier and the TAU information.

8. The method according to any one of claims 4 to 7, wherein, the second information is carried in at least one of the following messages: registration message, uplink non-access stratum NAS message, service request message.

9. The method according to any one of claims 3 to 8, wherein, the method further includes: the first core network device obtains the subscription information of the terminal device from a fourth core network device, and the subscription information includes the second address.

10. The method according to claim 9, wherein, the first core network device obtains the subscription information of the terminal device from a fourth core network device, including: during the registration process of the terminal device in the first network, the first core network device obtains the subscription information from the fourth core network; wherein, the fourth core network device is used to obtain the second address from the terminal device through a fifth core network device before the registration process.

11. The method according to any one of claims 3 to 10, wherein, the first information is a short message, the first address is the source address of the short message, and the second address is the destination address of the short message.

12. The method according to any one of claims 1 to 11, wherein, the first core network device sends the first information to the terminal device through a second core network device, including: the first core network device sends the first information to the terminal device through the second core network device and a second network.

13. The method according to any one of claims 1 to 12, wherein, the first core network device is an access and mobility management function AMF.

14. The method according to any one of claims 1 to 13, wherein, the first network is a new radio non-terrestrial network NR NTN, the second network is a narrowband Internet of Things NB IOT; or, the first network is a fifth-generation mobile communication technology 5G, the second network is a fourth-generation mobile communication technology 4G; or, the first network is a sixth-generation mobile communication technology 6G, the second network is 4G; or, the first network is 6G, the second network is 5G.

15. The method according to any one of claims 1 to 14, wherein, the first information is used to remind the user of at least one of the following: the first information is used to remind the user that the first network enters the connected state, the first information is used to remind the user that the first network is paging the terminal device, the first information is used to remind the user that there is downlink data, the first information is used to remind the user that there is an incoming call, the first information is used to remind the user that there is a short message, the first information is used to remind the user to align with the first network, the first information is used to remind the user to align with the orientation or direction where the access network device of the first network is located.

16. An information transmission method, wherein, it includes: The terminal device receives the first information through the second network, where the first information is used to trigger the terminal device to enter the connected state in the first network, or the first information is used to remind the user.

17. According to the method described in claim 16, wherein, the first information includes at least one of the following: a first address, a second address; wherein, the first address is the Mobile Station International Integrated Services Digital Network Number (MSISDN) corresponding to the first identifier, and the first identifier is the permanent identifier used by the terminal device in the first network; the second address is the MSISDN corresponding to the second identifier, and the second identifier is the permanent identifier used by the terminal device in the second network.

18. According to the method described in claim 17, wherein, the method further includes: the terminal device sends second information to the first core network device through the first network; wherein, the second information includes at least one of the following: the second address, indication information, a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is the temporary identifier used by the terminal device in the second network.

19. According to the method described in claim 18, wherein, the second information further includes Tracking Area Update (TAU) information.

20. According to the method described in claim 18 or 19, wherein, the second information is carried in at least one of the following messages: registration message, uplink Non-Access Stratum (NAS) message, service request message.

21. According to the method described in any one of claims 17 to 20, wherein, the method further includes: the terminal device sends the second address to the first core network device.

22. According to the method described in any one of claims 16 to 21, wherein, the first network is a New Radio Non-Terrestrial Network (NR NTN), and the second network is a Narrowband Internet of Things (NB-IoT); or, the first network is the 5th Generation Mobile Communication Technology (5G), and the second network is the 4th Generation Mobile Communication Technology (4G); or, the first network is the 6th Generation Mobile Communication Technology (6G), and the second network is 4G; or, the first network is 6G, and the second network is 5G.

23. An information transmission device, wherein, comprising: a receiving unit, configured to receive a first message, where the first message is used to trigger the first core network device to page the terminal device through the first network; a sending unit, configured to send the first information to the terminal device through the second core network device, where the first information is used to trigger the terminal device to enter the connected state in the first network, or the first information is used to remind the user.

24. According to the device described in claim 23, wherein, the sending unit is specifically configured to: send the first information to the terminal device through the second core network device when a first condition is met; wherein, the first condition includes at least one of the following: After the first core network device sends a paging message to the terminal device through the first network, it does not receive a non-access stratum (NAS) message sent by the terminal device within a predetermined duration. The first core network device predicts that the terminal device cannot receive the paging message. The radio access technology of the first network is a specific radio access technology.

25. The apparatus according to claim 23 or 24, wherein, the first information includes at least one of the following: a first address, a second address; wherein, the first address is a mobile station international integrated services digital network number (MSISDN) corresponding to a first identifier, and the first identifier is a permanent identifier used by the terminal device within the first network; the second address is an MSISDN corresponding to a second identifier, and the second identifier is a permanent identifier used by the terminal device within a second network.

26. The apparatus according to claim 25, wherein, the receiving unit is further configured to: obtain second information from the terminal device through the first network; wherein, the second information includes at least one of the following: the second address, indication information, a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device within the second network; alternatively, the receiving unit is further configured to: obtain the subscription information of the terminal device from a fourth core network device, and the subscription information includes the second address.

27. An information transmission apparatus, wherein, comprises: a receiving unit, configured to receive first information through a second network, where the first information is used to trigger the terminal device to enter a connected state within a first network, or the first information is used to remind a user.

28. The apparatus according to claim 27, wherein, the first information includes at least one of the following: a first address, a second address; wherein, the first address is a mobile station international integrated services digital network number (MSISDN) corresponding to a first identifier, and the first identifier is a permanent identifier used by the terminal device within the first network; the second address is an MSISDN corresponding to a second identifier, and the second identifier is a permanent identifier used by the terminal device within a second network.

29. The apparatus according to claim 28, wherein, the receiving unit is further configured to: send the second information to a first core network device through the first network; or send the second address to a first core network device; wherein, the second information includes at least one of the following: the second address, indication information, a third identifier; the indication information indicates that the terminal device supports one number for multiple terminals or supports multi-registration, and the third identifier is a temporary identifier used by the terminal device within the second network.

30. A core network device, wherein, comprises a transceiver, a processor, and a memory, the memory stores a program or instruction that can run on the processor, and when the program or instruction is executed by the processor, it implements the steps in the information transmission method according to any one of claims 1 to 15.

31. A terminal device, characterized in that, it includes a transceiver, a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the steps in the information transmission method according to any one of claims 16 to 22 are implemented.

32. A readable storage medium, characterized in that, programs or instructions are stored on the readable storage medium, and when the programs or instructions are executed by a processor, the steps in the information transmission method according to any one of claims 1 to 15 are implemented, or the steps in the information transmission method according to any one of claims 16 to 22 are implemented.

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