Information transmission methods and apparatuses, core network devices and terminal device

Abstract

The present application relates to the field of communications. Provided are information transmission methods and apparatuses, core network devices and a terminal device. An information transmission method provided in the embodiments of the present application comprises: a first core network device receiving a first message, the first message being used for triggering the first core network device to page a terminal device by means of a first network; and the first core network device sending first information to the terminal device by means of 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 notifying a user. The method can improve the reliability of data transmission and user experience.

Description

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

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on December 7, 2023, with application number 202311678532.6 and invention name “Information Transmission Method, Device, Core Network Equipment and Terminal Equipment”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of communications, and more specifically, to an information transmission method, apparatus, core network equipment, and terminal equipment. Background Art

[0004] In some scenarios, a terminal may not be able to successfully receive paging messages, resulting in missed calls or data, impacting the user experience. For example, in New Radio Non-Terrestrial Network (NR NTN) scenarios, NR NTN lacks a paging message retransmission mechanism, which may prevent the terminal device from successfully receiving paging messages. Alternatively, the terminal may be unable to successfully interpret paging messages due to a weak signal.

[0005] Therefore, there is a need in the art to provide an information transmission method to improve the reliability of data transmission and user experience. Summary of the Invention

[0006] The embodiments of the present application provide an information transmission method, apparatus, core network equipment, and terminal equipment, which can improve the reliability of data transmission and user experience.

[0007] In a first aspect, an information transmission method is provided, which is performed by a first core network device. The method includes:

[0008] The first core network device receives 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;

[0009] The first core network device sends 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 a connected state in the first network, or the first information is used to remind a user.

[0010] In a second aspect, an information transmission method is provided, which is performed by a terminal device, and the method includes:

[0011] The terminal device receives first information through the 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.

[0012] In a third aspect, an information transmission device is provided, comprising:

[0013] 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;

[0014] A sending unit is used to send 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 a connected state in the first network, or the first information is used to remind the user.

[0015] In a fourth aspect, an information transmission device is provided, comprising:

[0016] The receiving unit is used to receive first information through the 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 the user.

[0017] In a fifth aspect, a core network device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be 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.

[0018] In a sixth aspect, a core network device is provided, including a processor and a communication interface, wherein the communication interface is used to:

[0019] receiving 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;

[0020] A first message is sent to the terminal device through the second core network device, where the first message is used to trigger the terminal device to enter a connected state in the first network, or the first message is used to remind the user.

[0021] In a fifth aspect, a terminal device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be 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.

[0022] In the seventh aspect, a terminal device is provided, comprising a processor and a communication interface, wherein the communication interface is used to receive first information through a second network, 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.

[0023] In an eighth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is 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.

[0024] In the tenth aspect, a wireless communication system is provided, comprising: a terminal device and a core network device, wherein the core network device can be used to execute the steps of the method described in the first aspect, and the terminal device can be used to execute the steps of the method described in the second aspect.

[0025] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0026] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the method described in the first aspect, or to implement the steps of the method described in the second aspect.

[0027] In an embodiment of the present application, a first core network device receives a first message, and the first message is used to trigger the first core network device to page a terminal device through the first network; the first core network device sends a first message to the terminal device through a second core network device, and the first message is used to trigger the terminal device to enter a connected state in the first network, or the first message is used to remind the user. This is equivalent to enabling the terminal device to enter a connected state in the first network or to achieve the purpose of reminding the user, even if the first core network device cannot page the terminal device through the first network, thereby improving the reliability of data transmission and user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application.

[0030] FIG2 is a schematic diagram of a paging process provided in an embodiment of the present application.

[0031] FIG3 is a schematic flowchart of an information transmission method provided in an embodiment of the present application.

[0032] FIG4 is a schematic flowchart of another information transmission method provided in an embodiment of the present application.

[0033] FIG5 is a schematic flowchart of an address acquisition method provided in an embodiment of the present application.

[0034] FIG6 is a schematic flowchart of another address acquisition method provided in an embodiment of the present application.

[0035] FIG7 is a schematic flowchart of another address acquisition method provided in an embodiment of the present application.

[0036] FIG8 is a schematic block diagram of an information transmission device provided in an embodiment of the present application.

[0037] FIG9 is a schematic block diagram of another information transmission device provided in an embodiment of the present application.

[0038] FIG10 is a schematic block diagram of a communication device provided in an embodiment of the present application.

[0039] Figure 11 is a schematic block diagram of a core network device provided in an embodiment of the present application.

[0040] Figure 12 is a schematic block diagram of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0042] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, 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 generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0043] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0044] It is worth noting that the technology described in the embodiments of the present 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 the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and the NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as the 6th generation (6G) system. th Generation, 6G) communication system.

[0045] FIG1 shows a block diagram of a wireless communication system applicable to an embodiment of the present application.

[0046] As shown in FIG1 , the wireless communication system includes a terminal 11 and a network-side device 12 .

[0047] The terminal 11 may be a mobile phone, tablet computer, laptop computer, notebook computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), augmented reality (AR), virtual reality (VR) device, robot, wearable device, flight vehicle, vehicle user equipment (VUE), shipborne equipment, pedestrian user equipment (PUE), smart home (home appliances with wireless communication functions, such as refrigerators, televisions, washing machines, or furniture), game console, personal computer (PC), ATM or self-service machine, etc. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. The vehicle-mounted device may also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit. In addition to the aforementioned terminal devices, it may also be a chip within a 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 this application.

[0048] The network side device 12 may include an access network device or a core network device.

[0049] Access network equipment may also be referred to as radio access network (RAN) equipment, radio access network functions, or radio access network units. Access network equipment may include base stations, wireless local area network (WLAN) access points (AS), or wireless fidelity (WiFi) nodes. Among them, the base station can 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 (homeevolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the field. As long as the same technical effect is achieved, the base station is not limited to a specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0050] The core network device may include but is not limited to at least one of the following: core network node, core network function, mobility management entity (MME), access mobility management function (AMF), session management function (SMF), user plane function (UPF), policy control function (PCF), policy and charging rules function unit (PCRF), edge application service discovery function (EASDF), unified data management (UDM), unified data storage (UDR), home user server (HSS), centralized network configuration (CNC), network storage function (NRF), network exposure function (NEF), local NEF (L-NEF), binding support function (BSF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), network access function (UMF), Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is 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 ( Function, AF), Short Message Service Function (SMSF), Short Message Service Center (SC), Short Message Service (SMS) is used to provide short message service Interworking Mobile Switching Center (interworking MSC for short message service, IWMSC), Equipment Identity Register (Equipment Identity Register, EIR), IP Multimedia Subsystem Application Server (IMS AS) is etc. It should be noted that in the embodiment of the present application, only the core network device in the NR system is introduced as an example, and the specific type of the core network device is not limited.

[0051] In order to facilitate a better understanding of the embodiments of the present application, the technologies related to the present application are explained.

[0052] FIG2 is a schematic diagram of a paging process 200 provided in an embodiment of the present application.

[0053] As shown in FIG2 , the paging process 200 of a terminal device in a 5G network may include:

[0054] S201, UPF receives downlink data sent to the terminal device.

[0055] S202, UPF sends a data notification message to SMF, where the data notification message is used to notify SMF that there is downlink data that needs to be sent to the terminal device.

[0056] S203, SMF sends a request message to AMF, where the request message is used to request sending downlink data to the terminal device, and the request message may be a Namf_Communication_N1N2MessageTransfer message.

[0057] S204, AMF sends a paging message to all base stations (gNB) in the area where the terminal device is located.

[0058] S205: All base stations in the area where the terminal device is located send paging messages to page the terminal device within their coverage areas.

[0059] 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 fifth-generation mobile communication technology (5-Generation, 5G) New Radio Non-Terrestrial Network (NR NTN) scenario, because NR NTN does not have a paging message retransmission mechanism, 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.

[0060] In view of this, the embodiments of the present application provide an information transmission method, apparatus, core network equipment, and terminal equipment, which can improve the reliability of data transmission and user experience.

[0061] The information transmission provided by the embodiments of the present application is described in detail below through some embodiments and their application scenarios in combination with the accompanying drawings.

[0062] FIG3 is a schematic flowchart of an information transmission method 300 according to an embodiment of the present application.

[0063] As shown in FIG3 , the information transmission method 300 may include at least part of the following contents:

[0064] 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.

[0065] Exemplarily, the first core network device may be an AMF or a device having AMF function.

[0066] Exemplarily, the first message may be a request message, and the request message is used to request sending downlink data to the terminal device.

[0067] S302, the first core network device sends 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 a connected state in the first network, or the first information is used to remind the user.

[0068] 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, the first core network device may first send a paging message to all base stations in the area where the terminal device is located after receiving the first message, and send the first information to the terminal device through the second core network device if the sending condition of the first information is met.

[0069] Exemplarily, the second core network device may be an SMSF or a device having SMSF functionality.

[0070] Exemplarily, the first information is used to remind the user including but not limited to at least one of the following: the first information can be used to remind the user to enter a connected state in the first network, the first information can be used to remind the user that the first network is paging the terminal device, the first information can be used to remind the user that there is downlink data, the first information can be used to remind the user that there is an incoming call, the first information can be used to remind the user that there is a text message, the first information can be used to remind the user to align with the first network, and the first information can be used to remind the user to align with the position or direction of the access network device of the first network.

[0071] Exemplarily, if the first information is used to trigger the terminal device to enter a connected state on the first network, after receiving the first information, the terminal device enters a connected state on the first network through the first information.

[0072] Exemplarily, if the first information is used to trigger the terminal device to enter a connected state in the first network, the terminal device may not display the first information to the user.

[0073] Exemplarily, if the first information is used to remind the user, the terminal device may display the first information to the user.

[0074] It should be noted that the user here is a user who uses or operates the terminal device.

[0075] In this embodiment, the first core network device sends a first message to the terminal device via the second core network device. The first message is used to trigger the terminal device to enter a connected state on the first network, or the first message is used to alert a user. This means that even if the first core network device cannot page the terminal device via the first network, the terminal device can still enter a connected state on the first network or alert the user, thereby improving data transmission reliability and user experience.

[0076] In some embodiments, the S302 may include:

[0077] 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;

[0078] The first condition includes at least one of the following:

[0079] After the first core network device sends a paging message to the terminal device through the first network, the first core network device does not receive a non-access stratum (NAS) message sent by the terminal device within a predetermined time period;

[0080] The first core network device predicts that the terminal device cannot receive the paging message;

[0081] The wireless access technology of the first network is a specific wireless access technology.

[0082] Exemplarily, the predetermined duration may be a duration agreed upon in a protocol, or the predetermined duration may be information stored by the first core network device. Alternatively, the predetermined duration may be a duration configured by another device, or the predetermined duration may be a duration obtained or received by the first core network device from another device.

[0083] Exemplarily, when the wireless access technology of the first network is a specific wireless 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 used by the wireless access technology of the first network are specific values, it can be determined that the wireless access technology of the first network is a specific wireless 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.

[0084] Exemplarily, the first core network device predicts that the terminal device cannot receive the paging message, including: the first core network device predicts that the probability that the terminal device cannot receive the paging message is greater than or equal to a preset threshold.

[0085] 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 the first identifier, and the first identifier is a 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 a permanent identifier used by the terminal device in the second network.

[0086] It should be noted that the MSISDN involved in this application can also be replaced by a Generic Public Subscription Identifier (GPSI).

[0087] Exemplarily, the first identifier includes but is not limited to: a Subscription Permanent Identifier (SUPI) and an International Mobile Subscriber Identity (IMSI).

[0088] Exemplarily, the second identifier includes but is not limited to: SUPI, IMSI.

[0089] Illustratively, the first address and the second address may be the same or different.

[0090] It is worth noting that the first address is the address used by the terminal device in the first network, and the second address is the address used by the terminal device in the second network. In other alternative embodiments, the first address or the second address may also be other forms of addresses, which are not specifically limited in this application.

[0091] In some embodiments, the method 300 may further include:

[0092] 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

[0093] Exemplarily, the first core network device receives the second information from the terminal device through the first network.

[0094] Exemplarily, the first core network device may obtain the second address from the terminal device through the first network; or, the first core network device may obtain the indication information from the terminal device through the first network, and determine the second address based on the indication information; or, the first core network device may obtain a third identifier from the terminal device through the first network, and obtain the second address based on the third identifier.

[0095] Exemplarily, the third identifier is a temporary identifier allocated by the third core network device to the terminal device when the terminal device registers in the second network. The third core network device may be an MME or a device with MME functions.

[0096] Exemplarily, the third identifier may be a Globally Unique Temporary Identity (GUTI).

[0097] In some embodiments, the second information includes the indication information, and the method 300 may further include:

[0098] The first core network device determines the first address as the second address based on the indication information.

[0099] Exemplarily, since the indication information indicates that the terminal device supports one number for multiple terminals or supports multiple registrations, it means that the terminal device shares an address in the first network and the second network. In this case, the first core network device can directly determine the first address as the second address.

[0100] In some embodiments, the second information includes the third identifier, and the method 300 may further include:

[0101] The first core network device obtains the second address or the second identifier from the 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 the fourth core network device based on the second identifier.

[0102] Exemplarily, after the first core network device obtains the third identifier, it obtains the second address from the third core network device based on the third identifier. For example, after the first core network device obtains the third identifier, it sends a first request to the third core network device, where the first request includes the third identifier. After the third core network device receives the first request, it sends a first response to the first core network device, where the first response includes the second address.

[0103] Exemplarily, after the first core network device obtains the third identifier, it obtains the second identifier from the 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 the first core network device obtains the third identifier, it sends a first request to the fourth core network device, the first request includes the third identifier, and after the fourth core network device receives the first request, it 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.

[0104] Exemplarily, the third core network device may be an MME or a device having MME functions.

[0105] Exemplarily, the fourth core network device may be a UDM or a device having a UDM function.

[0106] In some embodiments, the second information further includes tracking area update (TAU) information; wherein the first core network device obtains the second address or the second identifier from the third core network device based on the third identifier, which can be implemented as follows:

[0107] 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.

[0108] Exemplarily, after the first core network device obtains the third identifier and the TAU information, it obtains the second address from the third core network device based on the third identifier and the TAU information. For example, after the first core network device obtains the third identifier and the TAU information, it sends a first request to the third core network device, where 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, if the verification is successful, sends a first response to the first core network device, where the first response includes the second address.

[0109] Of course, in other alternative embodiments, the third core network device verifies the TAU information, and if the verification fails, it may also send a first response to the first core network device, and 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.

[0110] Exemplarily, after the first core network device obtains the third identifier and the TAU information, it 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 the first core network device obtains the third identifier and the TAU information, it sends a first request to the fourth core network device, the first request including the third identifier and the TAU information. After receiving the first request, the fourth core network device verifies the TAU information and, if the verification passes, sends a first response to the first core network device, the first response including 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 including 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 including the second address.

[0111] In some embodiments, the second information is carried in at least one of the following messages:

[0112] Registration message, uplink NAS message, service request message.

[0113] 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 this application does not make any specific limitation on this.

[0114] In some embodiments, the method 300 may further include:

[0115] The first core network device obtains the contract information of the terminal device from the fourth core network device, and the contract information includes the second address.

[0116] Exemplarily, the first core network device sends a contract information request to the fourth core network device. After receiving the contract information request, the fourth core network device sends a contract information response to the first core network device, and the contract information response includes the second address.

[0117] In some embodiments, the first core network device obtains the subscription information of the terminal device from the fourth core network device, which may be implemented as follows:

[0118] 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.

[0119] Exemplarily, during the registration process of the terminal device in the first network, the first core network device sends a contract information request to the fourth core network device. After receiving the contract information request, the fourth core network device sends a contract information response to the first core network device, and the contract information response includes the second address.

[0120] 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 configuration of the second address.

[0121] Exemplarily, the fourth core network device may be a UDM or a device having a UDM function.

[0122] Exemplarily, the fifth core network device may be an IMS AS or a device having IMS AS functions.

[0123] 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.

[0124] Of course, in other alternative embodiments, the first information may also be any message or information in a message that can be sent to the terminal device through the second core network device, and this application does not make any specific limitations on this.

[0125] In some embodiments, the S302 may include:

[0126] The first core network device sends the first information to the terminal device through the second core network device and the second network.

[0127] 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.

[0128] In some embodiments, the first network is the New Wireless Non-Terrestrial Network (NR NTN), and the second network is the Narrowband Internet of Things (NB IOT); or, the first network is the fifth generation mobile communication technology 5G, and the second network is the fourth generation mobile communication technology 4G; or, the first network is the sixth generation mobile communication technology 6G, and the second network is 4G; or, the first network is 6G, and the second network is 5G.

[0129] It should be understood that the solution provided in this application can also be extended to any applicable scenario in which the second network helps the first network enter a connected state or reminds the user through the second network. For example, taking the ground 5G+4G scenario (that is, the first network is ground 5G and the second network is ground 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 a connected state in 5G or remind the user. For example, the second network can be a narrow band Internet of Things (NB IOT) or a ground network 4G (TN 4G) network; the first network can be a ground network 5G (TN 5G), etc.

[0130] The technical solution of this application is described below through Examples 1 to 4.

[0131] Example 1:

[0132] 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.

[0133] FIG4 is a schematic flowchart of another information transmission method 410 provided in an embodiment of the present application.

[0134] As shown in FIG4 , the information transmission method 410 may include:

[0135] S411, UPF receives downlink data sent to the terminal device.

[0136] S412, UPF sends a data notification message to SMF, the data notification message is used to notify SMF that there is downlink data that needs to be sent to the terminal device.

[0137] S413, SMF sends a request message to 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.

[0138] S414, AMF sends a paging message to all base stations (gNB) in the area where the terminal device is located.

[0139] S415: All base stations in the area where the terminal device is located send paging messages to page the terminal device within their coverage areas.

[0140] S416, AMF generates first information.

[0141] Exemplarily, the first information is used to trigger the terminal device to enter a connected state on the NR-NTN, or the first information is used to alert a user. The first information used to alert the user includes, but is not limited to: the first information may be used to alert the user to enter a connected state on the NR-NTN, the first information may be used to alert the user that the NR-NTN is paging the terminal device, the first information may be used to alert the user to align with the NR-NTN, and the first information may be used to alert the user to align with the direction or orientation of an access network device of the NR-NTN. The access network device of the NR-NTN may be a satellite device.

[0142] For example, AMF may trigger the process of generating a text message based on the following conditions:

[0143] Condition 1: After the AMF sends a paging message via NR NTN, it does not receive a NAS message from the terminal device within a predetermined time.

[0144] Condition 2: The AMF predicts that the terminal device cannot receive or is likely to be unable to receive the paging message.

[0145] Condition 3: AMF determines that the access technology of the terminal device is NR NTN.

[0146] Exemplarily, the first information includes an original address and a target address. The original address is the MSISDN corresponding to the IMSI or SUPI used by the terminal device in the NR NTN. The target address is the MSISDN corresponding to the IMSI or SUPI used by the terminal device in the NB NTN.

[0147] It should be noted that NB NTN can also be IOT NTN or NB IOT NTN.

[0148] The target address can be determined in any of the following ways:

[0149] Method 1:

[0150] When registering within the NR NTN, a terminal device may include at least one of the following information in the registration message:

[0151] Destination address;

[0152] Indication information, used to indicate that the terminal device supports one number for multiple terminals or supports multiple registrations;

[0153] Temporary identifier of terminal equipment used in NB NTN, such as GUTI.

[0154] If the terminal device can carry the indication information in the registration message when registering in the NR NTN, the AMF can directly determine the original address of the first information as the destination address.

[0155] If the terminal device can carry a temporary identifier used by the terminal device in the NB NTN, such as GUTI, in the registration message when registering in the 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 the NB NTN from the MME based on the GUTI, such as IMSI or SUPI, and then obtain the destination address from the UDM based on the IMSI or SUPI.

[0156] Method 2:

[0157] AMF obtains the destination address from the contract information.

[0158] It is worth noting that the phone cards in the terminal device can be divided into three situations:

[0159] Case 1:

[0160] The terminal device can be configured with two independent SIM cards. These two SIM cards have their own MSISDNs. The MSISDN of one of the two SIM cards corresponds to a unique identifier in the NR NTN, and the MSISDN of the other of the two SIM cards corresponds to a unique identifier in the NB NTN. The corresponding unique identifier can be IMSI or SUPI.

[0161] Case 2:

[0162] A terminal device can be configured with two independent SIM cards. These two SIM cards use a common MSISDN. This common 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 SUPI. This feature is also known as the terminal device supporting multiple terminals, multiple SIM cards, or multiple numbers.

[0163] Case 3:

[0164] The terminal device can be configured with one SIM card, which uses one MSISDN. 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 SUPI. This feature can also be referred to as the terminal device supporting dual registration, multiple registration, dual steer, or multiple steer.

[0165] As can be seen from this, for cases 1, 2, and 3, the terminal device will correspond to a unique identifier in the NR NTN, which can also be called the permanent identifier used by the terminal device in the NR NTN. For example, this permanent identifier can be an IMSI or SUPI. The terminal device will correspond to a unique identifier in the NB NTN, which can also be called the permanent identifier used by the terminal device in the NB NTN. For example, this permanent identifier can be an IMSI or SUPI. Taking IMSI as an example, the permanent identifier used by the terminal device in the NR NTN can be recorded as IMSI-1, and the permanent identifier used by the terminal device in the NB NTN can be recorded as IMSI-2.

[0166] S417, AMF sends the first information to SMSF.

[0167] S418, SMSF sends the first message to SMS-IWMSC / SC.

[0168] S419, the SMS-IWMSC / SC routes the first message to the terminal device via the NB NTN according to the second address in the first message.

[0169] S4110, the terminal device enters the connection state according to the first information.

[0170] Exemplarily, the terminal device enters a connected state in the NR NTN according to the first information.

[0171] It is worth noting that if the first information is used to trigger the terminal device to enter a connected state on the first network, then after receiving the first information, the terminal device triggers the terminal device to enter a connected state on the first network through the first information. If the first information is used to trigger the terminal device to enter a connected state on the first network, the terminal device may not display the first information. If the first information is used to remind a user, the terminal device may display the first information to the user.

[0172] In this embodiment, AMF sends the first information to the terminal device through SMSF. Based on this, even if AMF cannot page the terminal device through NR-NTN, the first information can enable the terminal device to enter a connected state in NR-NTN or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and user experience.

[0173] Of course, FIG4 is merely an example of the present application and should not be construed as limiting the present application.

[0174] For example, in other alternative embodiments, the AMF may also obtain the target address, indication information, or a temporary identifier used by the terminal device in the NB NTN through an uplink NAS message, a service request message, or other information. This application does not specifically limit this.

[0175] Example 2:

[0176] In this embodiment, assuming that the first network is NR-NTN and the second network is NB-NTN, when the terminal device is in a registered state in NR NTN, the permanent identifier used is recorded as IMSI-1, and when the terminal device is in a registered state in NB NTN, the permanent identifier used is recorded as IMSI-2. 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.

[0177] FIG5 is a schematic flowchart of an address acquisition method 420 provided in an embodiment of the present application.

[0178] As shown in FIG5 , the address acquisition method 420 may include:

[0179] S421, the terminal device sends a registration message to the AMF, which includes the destination address or indication information.

[0180] When registering within the NR-NTN, the terminal device may send a registration message to the AMF and include at least one of the following information in the registration message:

[0181] Destination address, that is, the MSISDN corresponding to IMSI-2;

[0182] The indication information is used to indicate that the terminal device supports one number for multiple terminals or supports multiple registrations.

[0183] Exemplarily, the indication information indicating that the terminal device supports one-number-multiple-terminals can also be understood as: the indication information is used to indicate that the terminal device supports dual registration, multiple registration, dual steer or multiple steer.

[0184] S422, AMF obtains the MSISDN corresponding to IMSI-2.

[0185] 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.

[0186] When the information carried by the terminal device in the registration message is this 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 the MSISDN corresponding to IMSI-1 can be directly determined as the MSISDN corresponding to IMSI-2.

[0187] S423: The terminal device completes the authentication process.

[0188] S424, execute the AMF registration process in UDM.

[0189] S425, AMF obtains the contract information of the terminal device from UDM.

[0190] S426: The terminal device receives the registration acceptance message sent by AMF.

[0191] In this embodiment, the AMF can obtain or determine the target address, that is, the MSISDN corresponding to the IMSI-2, through the information carried in the registration message, thereby ensuring the transmission reliability of the first information.

[0192] Of course, FIG5 is merely an example of the present application and should not be construed as limiting the present application.

[0193] For example, in other alternative embodiments, the AMF may also obtain the target address or indication information through an uplink NAS message, a service request message, or other information, which is not specifically limited in this application.

[0194] Example 3:

[0195] In this embodiment, assuming that the first network is NR-NTN and 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 recorded as IMSI-1, and the permanent identifier used by the terminal device when it is in the registered state in NB NTN is recorded as IMSI-2. The AMF can request the target address through the information carried in the registration message, that is, the MSISDN corresponding to IMSI-2.

[0196] FIG6 is a schematic flowchart of an address acquisition method 430 provided in an embodiment of the present application.

[0197] As shown in FIG6 , the address acquisition method 430 may include:

[0198] S431: The terminal device sends a registration message to the AMF.

[0199] When registering within the NR-NTN, the terminal device may send a registration message to the AMF and include the temporary identifier used by the terminal device within the NB NTN, such as the GUTI. Optionally, the terminal device may also include TAU information in the registration message.

[0200] S432: AMF sends a context request message to MME according to GUTI.

[0201] The context request message includes a temporary identifier used by the terminal device in the NB NTN, such as a GUTI. Optionally, the context request message includes TAU information, which is used by the MME to verify the identity of the terminal device.

[0202] 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 the IMSI-2 or the permanent identifier used by the terminal device in the NB NTN. The permanent identifier used by the terminal device in the NB NTN can be IMSI-2. For example, when the context request message includes TAU information, the MME verifies the identity of the terminal device based on the TAU information, and if the verification is successful, sends the mobility management context to the AMF.

[0203] S433: AMF obtains the MSISDN corresponding to IMSI-2.

[0204] When the mobility management context includes the MSISDN corresponding to IMSI-2, the AMF obtains the MSISDN corresponding to IMSI-2 directly from the mobility management context.

[0205] When the mobility management context includes IMSI-2, the AMF requests the UDM for the MSISDN corresponding to IMSI-2 based on IMSI-2.

[0206] S433: The terminal device completes the authentication process.

[0207] S434, execute the AMF registration process in UDM.

[0208] S435, AMF obtains the contract information of the terminal device from UDM.

[0209] S436: The terminal device receives the registration acceptance message sent by AMF.

[0210] 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.

[0211] Of course, FIG6 is merely an example of the present application and should not be construed as limiting the present application.

[0212] For example, in other alternative embodiments, the AMF may also obtain GUTI or TAU information through an uplink NAS message, a service request message, or other information, which is not specifically limited in this application.

[0213] Example 4:

[0214] In this embodiment, assuming that the first network is NR-NTN and the second network is NB-NTN, when the terminal device is in a registered state in NR NTN, the permanent identifier used by the terminal device is recorded as IMSI-1, and when the terminal device is in a registered state in NB NTN, the permanent identifier used by the terminal device is recorded as IMSI-2. The AMF can obtain the target address from the subscription information, that is, the MSISDN corresponding to IMSI-2.

[0215] FIG7 is a schematic flowchart of an address acquisition method 440 provided in an embodiment of the present application.

[0216] As shown in FIG. 7 , the address acquisition method 440 may include:

[0217] S441: The terminal device sends the MSISDN corresponding to IMSI-2 to the IMS AS.

[0218] For example, the terminal device can send the MSISDN corresponding to IMSI-2 to the IMS AS via the Ut interface. The Ut interface is the interface between the terminal device and the AS. For example, in response to call forwarding configuration, the terminal device can send the MSISDN corresponding to IMSI-2 to the IMS AS via the Ut interface.

[0219] S442, the IMS AS sends the MSISDN corresponding to IMSI-2 to the UDM.

[0220] For example, the IMS AS sends the MSISDN corresponding to IMSI-2 to the HSS+UDM.

[0221] S443: The terminal device sends a registration message to the AMF.

[0222] S444: The terminal device completes the authentication process.

[0223] S445, execute the AMF registration process in UDM.

[0224] S446: AMF obtains the subscription information of the terminal device from the UDM, which includes the MSISDN corresponding to IMSI-2.

[0225] S447. The AMF saves the MSISDN corresponding to the IMSI-2 so that the first information mentioned above can be sent based on the MSISDN corresponding to the IMSI-2.

[0226] S448: The terminal device receives the registration acceptance message sent by AMF.

[0227] In this embodiment, the AMF can obtain the target address, that is, the MSISDN corresponding to the IMSI-2, by obtaining the subscription information, thereby ensuring the transmission reliability of the first information.

[0228] It should be understood that Examples 1 to 4 are introduced using the non-terrestrial 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 may also be applicable to the terrestrial 5G+4G scenario, and may even be applicable to similar scenarios such as 6G+5G or 6G+4G. For example, taking the terrestrial 5G+4G scenario as an example, if the 5G signal is poor somewhere on the ground, a first message is sent to the terminal device through the 4G network, triggering the terminal device to enter a connected state in 5G or to remind the user. In other words, the solution provided in this application may also be extended to any applicable scenario in which the second network helps the first network enter a connected state or reminds the user through the second network. For example, the second network may be a Narrow Band Internet of Things (NB IOT) or a terrestrial 4G (TN 4G) network; the first network may be a terrestrial 5G (TN 5G), etc.

[0229] The information transmission method provided in the embodiment of the present application can be executed by an information transmission device. In the embodiment of the present application, the information transmission device provided in the embodiment of the present application is described by taking the information transmission method executed by the information transmission device as an example.

[0230] FIG8 shows a schematic block diagram of an information transmission device 500 according to an embodiment of the present application.

[0231] As shown in FIG8 , the information transmission device 500 includes:

[0232] A receiving unit 501 is 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;

[0233] The sending unit 502 is used to send 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 a connected state in the first network, or the first information is used to remind the user.

[0234] In some embodiments, the sending unit 502 is specifically configured to:

[0235] When the first condition is met, sending the first information to the terminal device through the second core network device;

[0236] The first condition includes at least one of the following:

[0237] After the first core network device sends a paging message to the terminal device through the first network, the first core network device does not receive a non-access stratum NAS message sent by the terminal device within a predetermined time period;

[0238] The first core network device predicts that the terminal device cannot receive the paging message;

[0239] The wireless access technology of the first network is a specific wireless access technology.

[0240] In some embodiments, the first information includes at least one of the following: a first address, a second address;

[0241] The first address is a Mobile Station International Integrated Services Digital Network number (MSISDN) corresponding to the first identifier, and the first identifier is a permanent identifier used by the terminal device within the first network;

[0242] The second address is the MSISDN corresponding to the second identifier, and the second identifier is a permanent identifier used by the terminal device in the second network.

[0243] In some embodiments, the receiving unit 501 is further configured to:

[0244] obtaining second information from the terminal device through the first network;

[0245] Among them, 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

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

[0247] The first address is determined as the second address based on the indication information.

[0248] In some embodiments, the second information includes the third identifier, and the receiving unit 501 is further configured to:

[0249] The second address or the second identifier is obtained from the 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 the fourth core network device based on the second identifier.

[0250] In some embodiments, the second information further includes tracking area update TAU information;

[0251] The receiving unit 501 is specifically configured to:

[0252] The second address or the second identifier is obtained from the third core network device based on the third identifier and the TAU information.

[0253] In some embodiments, the second information is carried in at least one of the following messages:

[0254] Registration message, uplink non-access layer NAS message, service request message.

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

[0256] Obtain the contract information of the terminal device from the fourth core network device, where the contract information includes the second address.

[0257] In some embodiments, the receiving unit 501 is specifically configured to:

[0258] During the registration process of the terminal device in the first network, the subscription information is obtained 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.

[0259] 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.

[0260] In some embodiments, the sending unit 502 is specifically configured to:

[0261] The first information is sent to the terminal device through the second core network device and the second network.

[0262] In some embodiments, the first core network device is an access mobility management function AMF.

[0263] In some embodiments, the first network is the New Wireless Non-Terrestrial Network (NR NTN), and the second network is the Narrowband Internet of Things (NB IOT); or, the first network is the fifth generation mobile communication technology 5G, and the second network is the fourth generation mobile communication technology 4G; or, the first network is the sixth generation mobile communication technology 6G, and the second network is 4G; or, the first network is 6G, and the second network is 5G.

[0264] In some embodiments, the first information is used to remind the user to include at least one of the following:

[0265] The first information is used to remind the user to enter a connected state in the first network, 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 text message, the first information is used to remind the user to aim at the first network, and the first information is used to remind the user to aim at the position or direction of the access network device of the first network.

[0266] It should be understood that the information transmission device 600 provided in the embodiment of the present application may correspond to the first core network device in the method embodiment of the present application, and the above-mentioned (or other) operations or functions of each unit in the information transmission device 600 are respectively for implementing the corresponding processes of the first core network device in the method embodiment shown in Figures 3 to 7. For the sake of brevity, they will not be repeated here.

[0267] 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, the terminal device can enter a connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and user experience.

[0268] FIG9 shows a schematic block diagram of an information transmission device 600 according to an embodiment of the present application.

[0269] As shown in FIG9 , the information transmission device 600 includes:

[0270] The receiving unit 601 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 on the first network, or the first information is used to remind a user.

[0271] In some embodiments, the first information includes at least one of the following: a first address, a second address;

[0272] The first address is a Mobile Station International Integrated Services Digital Network number (MSISDN) corresponding to the first identifier, and the first identifier is a permanent identifier used by the terminal device within the first network;

[0273] The second address is the MSISDN corresponding to the second identifier, and the second identifier is a permanent identifier used by the terminal device in the second network.

[0274] In some embodiments, the receiving unit 601 is further configured to:

[0275] Sending second information to the first core network device through the first network;

[0276] Among them, 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

[0277] In some embodiments, the second information further includes tracking area update TAU information.

[0278] In some embodiments, the second information is carried in at least one of the following messages:

[0279] Registration message, uplink non-access layer NAS message, service request message.

[0280] In some embodiments, the receiving unit 601 is further configured to:

[0281] Send the second address to the first core network device.

[0282] In some embodiments, the first network is a new wireless non-terrestrial network NR NTN, and the second network is a narrowband Internet of Things NB IOT; or, the first network is the fifth generation mobile communication technology 5G, and the second network is the fourth generation mobile communication technology 4G; or, the first network is the sixth generation mobile communication technology 6G, and the second network is 4G; or, the first network is 6G, and the second network is 5G.

[0283] It should be understood that the information transmission device 500 provided in the embodiment of the present application may correspond to the terminal in the method embodiment of the present application, and the above-mentioned (or other) operations or functions of each unit in the information transmission device 500 are respectively for implementing the corresponding processes executed by the terminal in the method embodiment of Figure 4. For the sake of brevity, they will not be repeated here.

[0284] In this embodiment, the information transmission 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, the terminal device can enter a connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and user experience.

[0285] The information transmission device in the embodiment of the present application can 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 can be a terminal or a core network device, or it can be a device other than a terminal. For example, the terminal can include but is not limited to the types of terminals 11 listed above, the core network device can include but is not limited to the types of core network devices in the network side devices 12 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiment of the present application.

[0286] The information transmission device provided in the embodiment of the present application can implement the various processes involved in the method embodiments shown in Figures 4 to 7 and achieve the same technical effects. To avoid repetition, they will not be described here.

[0287] FIG10 is an example of a communication device 700 provided in an embodiment of the present application.

[0288] As shown in Figure 10, the communication device 700 includes a processor 701 and a memory 702. The memory 702 stores a program or instruction that can be run on the processor 701. When the program or instruction is executed by the processor 701, the various steps of the above-mentioned information transmission method embodiment are implemented. For example, when the communication device 700 is a terminal, when the program or instruction is executed by the processor 701, the various steps performed by the terminal in the above-mentioned information transmission method embodiment are implemented, and the same technical effect can be achieved. When the communication device 700 is a core network device, when the program or instruction is executed by the processor 701, the various steps performed by the first core network device in the above-mentioned information transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, they will not be described here.

[0289] The present application also provides a core network device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiments shown in Figures 4 to 7. This core network device embodiment corresponds to the aforementioned core network device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this core network device embodiment and can achieve the same technical effects.

[0290] FIG11 is an example of a core network device 800 provided in an embodiment of the present application.

[0291] As shown in Figure 11, the core network device 800 includes: a processor 801, a network interface 802, and a memory 803. The network interface 802 is, for example, a common public radio interface (CPRI).

[0292] The core network device 800 of an embodiment of the present invention may also include: instructions or programs stored in the memory 803 and executable on the processor 801. The processor 801 calls the instructions or programs in the memory 803 to execute the methods executed by the modules shown in Figures 4 to 7 and achieve the same technical effect. To avoid repetition, they will not be elaborated here.

[0293] The present application also provides a terminal including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps in the method embodiments shown in Figures 4 to 7. This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects.

[0294] FIG12 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0295] As shown in Figure 12, the terminal 900 includes but is not limited to: 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 at least some of the components of the processor 910.

[0296] Those skilled in the art will appreciate that the terminal 900 may further include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 910 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG12 does not limit the terminal. The terminal may include more or fewer components than shown, or combine certain components, or arrange the components differently, which will not be described in detail here.

[0297] It should be understood that in an embodiment of the present application, the input unit 904 may include a graphics processing unit (GPU) 9041 and a microphone 9042, and the graphics processor 9041 processes the image data of a static picture or video 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 a liquid crystal display, an organic light emitting diode, etc. The user input unit 907 includes a touch panel 9071 and at least one of other input devices 9072. The touch panel 9071 is also called a touch screen. The touch panel 9071 may include two parts: a touch detection device and a touch controller. 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, and an operating stick, which will not be repeated here.

[0298] In the embodiment of the present application, after receiving downlink data from a network-side device, the RF unit 901 may transmit the data to the processor 910 for processing. Furthermore, the RF unit 901 may send uplink data to the network-side device. Typically, the RF unit 901 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0299] The memory 909 can be used to store software programs or instructions and 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, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 909 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may 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 may 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 (DDRSDRAM), an enhanced synchronous dynamic random access memory (ESDRAM), a synchronous link dynamic random access memory (SLDRAM), and a direct memory bus random access memory (DRRAM). The memory 909 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0300] Processor 910 may include one or at least two processing units. Optionally, processor 910 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 910.

[0301] The radio frequency unit 901 is used to receive first information through the 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 the user.

[0302] 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, the terminal device can enter a connected state in the first network or achieve the purpose of reminding the user, thereby improving the reliability of data transmission and user experience.

[0303] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be described here.

[0304] An 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, the various processes of the above-mentioned information transmission method embodiment are implemented and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0305] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0306] An embodiment of the present application also provides a chip, which includes a processor and a communication interface, the communication interface and the processor are coupled, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0307] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0308] An 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 implement the various processes of the above-mentioned information transmission method embodiment and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0309] An embodiment of the present application also provides a communication system, including: a terminal and a core network device, wherein the terminal can be used to execute the steps performed by the terminal in the information transmission method described above, and the core network device can be used to execute the steps performed by the core network device in the information transmission method described above.

[0310] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0311] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned method-related embodiments can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for causing a terminal or core network device to execute the methods described in various embodiments of the present application.

[0312] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for transmitting information, wherein: include: The first core network device receives 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; The first core network device sends 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 a connected state in the first network, or the first information is used to remind a user.

2. The method according to claim 1, wherein: The first core network device sends first information to the terminal device through the second core network device, including: 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; 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, the first core network device does not receive a non-access layer 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 wireless access technology of the first network is a specific wireless access technology.

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

4. The method according to claim 3, wherein: The method further comprises: The first core network device obtains second information from the terminal device through the first network; Among them, 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

5. The method according to claim 4, wherein: 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, wherein: 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 the 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 the fourth core network device based on the second identifier.

7. The method according to claim 6, wherein: The second information also includes tracking area update TAU information; The first core network device acquiring the second address or the second identifier from the 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 layer NAS message, service request message.

9. The method according to any one of claims 3 to 8, wherein: The method further comprises: The first core network device obtains the contract information of the terminal device from the fourth core network device, and the contract 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 the 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 the 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 an original address of the short message, and the second address is a 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 first information to the terminal device through the 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 the second network.

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

14. The method according to any one of claims 1 to 13, wherein: The first network is the new wireless non-terrestrial network NR NTN, and the second network is the narrow broadband Internet of Things NB IOT; or, the first network is the fifth generation mobile communication technology 5G, and the second network is the fourth generation mobile communication technology 4G; or, the first network is the sixth generation mobile communication technology 6G, and the second network is 4G; or, the first network is 6G, and 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 to include at least one of the following: The first information is used to remind the user to enter a connected state in the first network, 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 text message, the first information is used to remind the user to aim at the first network, and the first information is used to remind the user to aim at the position or direction of the access network device of the first network.

16. A method for transmitting information, wherein: include: The terminal device receives first information through the 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.

17. The method according to claim 16, wherein: The first information includes at least one of the following: a first address, a second address; The first address is a mobile station international integrated services digital network number MSISDN corresponding to the 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 the second identifier, and the second identifier is a permanent identifier used by the terminal device in the second network.

18. The method according to claim 17, wherein: The method further comprises: The terminal device sends second information to the first core network device through the first network; Among them, 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

19. The method according to claim 18, wherein: The second information also includes tracking area update TAU information.

20. The method according to claim 18 or 19, wherein: The second information is carried in at least one of the following messages: Registration message, uplink non-access layer NAS message, service request message.

21. The method according to any one of claims 17 to 20, wherein: The method further comprises: The terminal device sends the second address to the first core network device.

22. The method according to any one of claims 16 to 21, wherein: The first network is the New Wireless Non-Terrestrial Network NR NTN, and the second network is the Narrow Broadband Internet of Things NB IOT; or, the first network is the fifth generation mobile communication technology 5G, and the second network is the fourth generation mobile communication technology 4G; or, the first network is the sixth 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: include: A receiving unit, configured to receive a first message, wherein the first message is used to trigger a first core network device to page a terminal device through a first network; A sending unit is used to send first information to the terminal device through the second core network device, wherein 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.

24. The device according to claim 23, wherein: The sending unit is specifically used for: When the first condition is met, sending the first information to the terminal device through the second core network device; 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, the first core network device does not receive a non-access layer 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 wireless access technology of the first network is a specific wireless access technology.

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

26. The device according to claim 25, wherein The receiving unit is also used for: Acquire second information from the terminal device through the first network; 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network; Alternatively, the receiving unit is further used for: The contract information of the terminal device is obtained from the fourth core network device, where the contract information includes the second address.

27. An information transmission device, wherein: include: The receiving unit is used to receive first information through the 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 the user.

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

29. The device according to claim 28, wherein The receiving unit is also used for: Sending second information to the first core network device through the first network; or Sending the second address to the first core network device; Among them, 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 multiple registrations, and the third identifier is a temporary identifier used by the terminal device in the second network.

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

31. A terminal device, wherein: The method comprises a transceiver, a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is 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, wherein: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the 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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