Method and apparatus for data transmission, storage medium, communication device and communication system

Description

1 / 154 “METHOD AND APPARATUS FOR DATA TRANSMISSION, STORAGE MEDIUM, COMMUNICATION DEVICE AND COMMUNICATION SYSTEM” CROSS-REFERENCE TO RELATED REQUEST

[001] This application is an International Application in National Stage No. PCT / CN2023 / 087093, filed on April 7, 2023, which is incorporated herein by reference in its entirety for all purposes. FIELD OF TECHNIQUE

[002] The present invention relates to the field of communication technologies and, in particular, to a method and apparatus for data transmission, a storage medium, a communication device and a communication system. BACKGROUND

[003] In current wireless communication systems, based on wireless mobile communication technology, various standards and protocols can be used for data transmission between a base station and a wireless mobile device. When the wireless mobile device transmits data to the network, regardless of the amount of data transmitted, the wireless mobile device may be required to establish a connection with the network. SUMMARY

[004] The present disclosure provides a method and apparatus for transmitting data, a storage medium, a communication device and a communication system.

[005] A first aspect of the embodiments of the present disclosure provides a method of data transmission, which is performed by a core network device and includes: to receive the first information sent by an access network device, where the first information is related to the configuration status of small data transmission. Petition 870250091214, dated 06 / 10 / 2025, pp. 188 / 353 2 / 154 carrying a terminal device; or sending the second piece of information to the access network device, where the second piece of information relates to terminated mobile communication based on the core network.

[006] With reference to some modalities of the first aspect, in some modalities, the method also includes: Based on the initial information, determine whether to transmit buffered downlink information, where downlink information includes signaling and / or buffered data, to perform core network-based terminated mobile communication.

[007] With reference to some modalities of the first aspect, in some modalities, the initial information includes at least one of the following: Initial information indicates whether the terminal device is configured for small data transmission; a first type of information corresponding to the small-scale data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; Limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; A first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 189 / 353 3 / 154

[008] With reference to some embodiments of the first aspect, in some embodiments, determining, based on the first information, whether buffered downlink information should be transmitted includes: Based on the initial indication information, determine that the terminal device is configured for small-scale data transmission and transmit the downlink information corresponding to that small-scale data transmission.

[009] With reference to some embodiments of the first aspect, in some embodiments, determining, based on the first information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information, transmitting downlink information corresponding to small-scale data transmission.

[0010] With reference to some embodiments of the first aspect, in some embodiments, determining, based on the first information, whether buffered downlink information should be transmitted includes: An extended discontinuous receive cycle, represented by the extended discontinuous receive cycle parameter, is greater than or equal to a predefined cycle, transmitting downlink information corresponding to small data transmission.

[0011] With reference to some embodiments of the first aspect, in some embodiments, determining, based on the first information, whether buffered downlink information should be transmitted includes: The data size of the first type of information in the downlink information is less than or equal to a data limit represented by the boundary information, transmitting the Petition 870250091214, dated 06 / 10 / 2025, pp. 190 / 353 4 / 154 downlink information corresponding to small data transmission.

[0012] With reference to some embodiments of the first aspect, in some embodiments, determining, based on the first information, whether buffered downlink information should be transmitted includes: A second protocol data unit session identifier corresponding to the first type of information in the downlink information is consistent with the first protocol data unit session identifier, and / or a second quality of service flow identifier corresponding to the first type of information in the downlink information is consistent with the first quality of service flow identifier, transmitting the downlink information corresponding to the small data transmission.

[0013] With reference to some modalities of the first aspect, in some modalities, receiving the first information sent by the access network device includes: to receive an initial message sent by the access network device, in which the first message carries the initial information.

[0014] With reference to some modalities of the first aspect, in some modalities, receiving the first message sent by the access network device includes: Receive a message from the control plane sent by the access network device.

[0015] With reference to some modalities of the first aspect, in some modalities, the reception of the first message sent by the access network device includes: receive a user plan message sent by Petition 870250091214, dated 06 / 10 / 2025, pp. 191 / 353 5 / 154 network access device.

[0016] With reference to some modalities of the first aspect, in some modalities, the reception of the first message sent by the access network device includes: Receive a terminal device idle state transition report message sent by the access network device.

[0017] With reference to some embodiments of the first aspect, in some embodiments, the idle state transition report message is sent after the access network device switches the terminal device to an idle state.

[0018] With reference to some modalities of the first aspect, in some modalities, the method also includes: To determine the transmission of buffered downlink information and, based on the initial information, transmit the downlink information corresponding to the small data transmission to the access network device.

[0019] With reference to some modalities of the first aspect, in some modalities, the second information includes at least one of the following: The second piece of information indicates the start of a buffer; a second type of information corresponding to the downlink information stored in buffer; Time information corresponding to downlink information stored in buffer; a data size corresponding to the downlink information stored in buffer; a third session identifier for the protocol data unit corresponding to the stored downlink information Petition 870250091214, dated 06 / 10 / 2025, pp. 192 / 353 6 / 154 in buffer; a third quality of service flow identifier corresponding to the buffered downlink information.

[0020] With reference to some embodiments of the first aspect, in some embodiments, sending the second information to the access network device includes: send a second message to the access network device, where the second message carries the second piece of information.

[0021] With reference to some embodiments of the first aspect, in some embodiments, sending the second message to the access network device includes: Send a message from the control plane to the access network device.

[0022] With reference to some embodiments of the first aspect, in some embodiments, the sending of the second message to the access network device includes: Send a user plan message to the access network device.

[0023] With reference to some modalities of the first aspect, in some modalities, the method also includes: receive the third piece of information sent by the access network device; and determine, based on this third piece of information, whether to transmit the downlink information corresponding to the small data transmission.

[0024] With reference to some modalities of the first aspect, in some modalities, the third piece of information includes at least one of the following: a third piece of information indicating the core network device that the terminal device is capable of receiving Petition 870250091214, dated 06 / 10 / 2025, page 193 / 353 7 / 154 ber as informações de downlink; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is able to receive; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is able to receive.

[0025] With reference to some modalities of the first aspect, in some modalities, the method also includes: Determine the transmission of downlink information corresponding to the small data transmission and, based on the third piece of information, transmit the downlink information corresponding to the small data transmission to the access network device.

[0026] A second aspect of the embodiments of the present disclosure provides a method of data transmission, which is performed by an access network device and includes: Send the first information to a core network device, where the first information relates to the configuration status of small-scale data transmission from a terminal device; or receive the second information sent by the core network device, where the second information relates to the terminated mobile communication based on the core network.

[0027] With reference to some modalities of the second aspect, in some modalities, the initial information includes at least one of the following: initial information indicating whether the device Petition 870250091214, dated 06 / 10 / 2025, pp. 194 / 353 8 / 154 tivo terminal is configured for small-scale data transmission; a first type of information corresponding to the small-scale data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; Limit information corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; A first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[0028] With reference to some embodiments of the second aspect, in some embodiments, the sending of the first information to the core network device includes: Send an initial message to the core network device, where the first message carries the first piece of information.

[0029] With reference to some embodiments of the second aspect, in some embodiments, sending the first message to the core network device includes: Send a message from the control plane to the core network device.

[0030] With reference to some embodiments of the second aspect, in some embodiments, sending the first message to the core network device includes: Send a message from the user's plan to the core network device. Petition 870250091214, dated 06 / 10 / 2025, pp. 195 / 353 9 / 154

[0031] With reference to some embodiments of the second aspect, in some embodiments, sending the first message to the core network device includes: Send a report message indicating an inactive state transition from the terminal device to the core network device.

[0032] With reference to some embodiments of the second aspect, in some embodiments, the sending of the idle state transition report message from the terminal device to the core network device includes: Switch the terminal device to an inactive state and send the inactive state transition report message to the core network device.

[0033] With reference to some modalities of the second aspect, in some modalities, the method also includes: to receive the downlink information corresponding to the small data transmission and transmitted by the core network device based on the initial information.

[0034] With reference to some modalities of the second aspect, in some modalities, the method also includes: Send the downlink information transmitted by the core network device to the terminal device via small data transmission.

[0035] With reference to some modalities of the second aspect, in some modalities, the method also includes: Determine, based on the second piece of information, whether to send a third piece of information to the core network device, where the third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and the downlink information includes signaling and / or data buffered by the core network device for the purpose of Petition 870250091214, dated 06 / 10 / 2025, page 196 / 353 10 / 154 cut the terminated mobile communication based on the core network.

[0036] With reference to some modalities of the second aspect, in some modalities, the second piece of information includes at least one of the following: The second piece of information indicates the start of a buffer; a second type of information corresponding to the downlink information stored in buffer; Time information corresponding to downlink information stored in buffer; a data size corresponding to the downlink information stored in buffer; a third session identifier for the protocol data unit corresponding to the buffered downlink information; a third quality of service flow identifier corresponding to the buffered downlink information.

[0037] With reference to some embodiments of the second aspect, in some embodiments, receiving the second piece of information sent by the core network device includes: receive a second message sent by the core network device, where the second message carries the second piece of information.

[0038] With reference to some embodiments of the second aspect, in some embodiments, receiving the second message sent by the core network device includes: Receive a message from the control plane sent by the core network device.

[0039] With reference to some modalities of the second aspect, in some modalities, the reception of the second message Petition 870250091214, dated 06 / 10 / 2025, p. 197 / 353 11 / 154 sent by the core network device includes: Receive a user plan message sent by the core network device.

[0040] With reference to some modalities of the second aspect, in some modalities, the method also includes: determine when to send the third piece of information to the core network device and generate the third piece of information based on the second piece of information; and send the third piece of information to the core network device.

[0041] With reference to some modalities of the second aspect, in some modalities, the third piece of information includes at least one of the following: Third piece of information indicates that the core network device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is able to receive; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is able to receive.

[0042] With reference to some modalities of the second aspect, in some modalities, the method also includes: to receive downlink information corresponding to small data transmissions transmitted by the core network device based on third-party information.

[0043] With reference to some modalities of the second aspect, in some modalities, the method also includes: Petition 870250091214, dated 06 / 10 / 2025, pp. 198 / 353 12 / 154 send the downlink information transmitted by the core network device to the terminal device via small data transmission.

[0044] A third aspect of the embodiments of the present disclosure provides a method of data transmission, which is performed by a communication system that includes an access network device, a core network device and a terminal device, and includes: The access network device sends an initial message to the core network device and receives initial information from the core network device, where the initial information relates to the configuration status of the small data transmission of the terminal device; or the core network device sends a second message to the access network device and receives the second message from the access network device, where the second message relates to the terminated mobile communication based on the core network.

[0045] A fourth aspect of the modalities of this disclosure provides a data transmission apparatus, including: A first receiving module, configured to receive the first information sent by an access network device, where the first information relates to the configuration status of the data transmission of a terminal device; or the device includes: A first transmission module, configured to send the second piece of information to the access network device, where the second piece of information is related to the terminated mobile communication based on the core network.

[0046] A fifth aspect of the present disclosure modalities Petition 870250091214, of 06 / 10 / 2025, p. 199 / 353 13 / 154 tion provides a data transmission device, including: a second transmission module, configured to send the initial information to a core network device, where the initial information relates to the data transmission configuration status of a terminal device; or the device includes: A second receiving module, configured to receive secondary information sent by the core network device, where this secondary information relates to terminated mobile communication based on the core network.

[0047] A sixth aspect of the present disclosure provides a communication device, including: one or more processors; where the processor is configured to invoke computer instructions, causing the communication device to implement the data transmission method according to optional implementations of the first aspect and the second aspect.

[0048] A seventh aspect of the embodiments of the present disclosure provides a communication system, including a core network device and an access network device, wherein the core network device is configured to implement the data transmission method according to the optional implementations of the first aspect, and the access network device is configured to implement the data transmission method according to the optional implementation of the second aspect.

[0049] An eighth aspect of the embodiments of the present disclosure provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions and, when the computer instructions are executed on a communication device, the communication device Petition 870250091214, dated 06 / 10 / 2025, pp. 200 / 353 14 / 154 The company is forced to implement the data transmission method according to the optional implementations of the first and second aspects.

[0050] The technical solutions provided in the embodiments of this disclosure may include the following beneficial effects. The first piece of information sent by an access network device is received, where the first piece of information relates to the configuration status of the small data transmission of a terminal device; or a second piece of information is sent to the access network device, where the second piece of information relates to the core network-based terminated mobile communication, so that the core network device can consider the configuration status of the small data transmission of the terminal device when processing the downlink information from the terminal device, and the access network device can recognize the situation related to the core network-based terminated mobile communication.

[0051] It should be understood that both the previous general description and the detailed description below are merely illustrative and explanatory and are not restrictive of disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] To illustrate more clearly the technical solutions in the embodiments of this disclosure, the drawings necessary for the description of the embodiments are presented below. The following drawings are only some embodiments of this disclosure and do not specifically limit the scope of protection of this disclosure.

[0053] FIG. 1a is a schematic structural diagram illustrating a communication system according to an embodiment of this disclosure.

[0054] FIG. 1 b is a schematic diagram illustrating another communication system according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, pp. 201 / 353 15 / 154 disclosure.

[0055] FIG. 2a is a flowchart that illustrates a method of data transmission according to an embodiment of the present disclosure.

[0056] FIG. 2b is a flowchart that illustrates another method of data transmission according to an embodiment of the present disclosure.

[0057] FIG. 2c is a flowchart that illustrates another method of data transmission according to an embodiment of the present disclosure.

[0058] FIG. 2d is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0059] FIG. 2e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0060] FIG. 2f is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0061] FIG. 2g is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0062] FIG. 3a is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0063] FIG. 3b is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0064] FIG. 3c is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, p. 202 / 353 16 / 154 disclosure.

[0065] Figure 3d is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0066] FIG. 3e is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0067] FIG. 3f is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0068] FIG. 4a is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0069] FIG. 4b is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0070] FIG. 4c is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0071] FIG. 4d is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0072] FIG. 4e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0073] FIG. 4f is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0074] FIG. 4g is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, pp. 203 / 353 17 / 154 disclosure.

[0075] FIG. 5a is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0076] FIG. 5b is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure.

[0077] FIG. 5c is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0078] FIG. 5d is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0079] FIG. 5e is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0080] FIG. 5f is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0081] FIG. 5g is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0082] FIG. 5h is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0083] FIG. 6a is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present disclosure.

[0084] FIG. 6b is a flowchart that illustrates yet another method of data transmission, according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, pp. 204 / 353 18 / 154 disclosure.

[0085] FIG. 7a is a block diagram of a 1000 data transmission device, according to an embodiment of the present disclosure.

[0086] FIG. 7b is a block diagram of yet another 1100 data transmission device, according to an embodiment of the present disclosure.

[0087] FIG. 8a is a block diagram of another data transmission device 2000, according to an embodiment of the present disclosure.

[0088] FIG. 8b is a block diagram of yet another 2100 data transmission device, according to an embodiment of the present disclosure.

[0089] FIG. 9 is a block diagram illustrating a communication device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0090] The embodiments of this disclosure provide a method and apparatus for data transmission, a storage medium, a communication device, and a communication system. In some embodiments, terms such as data transmission method, information processing method, and communication method may be interchangeable, terms such as data transmission apparatus, information processing apparatus, and communication device may be interchangeable, and terms such as communication system, information processing system, and communication system may be interchangeable.

[0091] The modalities of this disclosure are not exhaustive, but are merely illustrative of some modalities, without the intention of specifically limiting the scope of protection of this Petition 870250091214, dated 06 / 10 / 2025, pp. 205 / 353 19 / 154 disclosure. In the case of no contradiction, each step in a given modality can be implemented as an independent modality, and the steps can be combined arbitrarily. For example, the solution after removing some of the steps in a given modality can also be implemented as an independent modality, and the order of the steps in a given modality can be arbitrarily swapped. Furthermore, the optional implementations in a given modality can be combined arbitrarily. Additionally, modalities can be combined arbitrarily. For example, some or all of the steps in different modalities can be combined arbitrarily, and a given modality can be arbitrarily combined with the optional implementations of other modalities.

[0092] The terms used in the embodies of this disclosure are for the sole purpose of describing specific embodies and are not intended to limit this disclosure. The unique expressions “a”, “an”, “the”, “the above”, “said”, “the preceding”, “this” and the like in the embodies of this disclosure also include plural expressions, unless clearly indicated otherwise in the context. In the embodies of this disclosure, “a plurality of” means two or more.

[0093] Prefixed words such as “first” and “second” in the embodiments of this disclosure are used only to distinguish different objects described and do not constitute a limitation as to the position, order, priority, quantity, or content of the objects described. For the description of the objects described, reference may be made to the context description in the claims or embodiments, and no redundant limitation should be made due to the use of prefixed words. For example, if the object described is a field, the ordinal numbers before the field in the first field and in the second field Petition 870250091214, dated 06 / 10 / 2025, pp. 206 / 353 The 20 / 154 field does not limit a field location or sequence, and the first and second fields do not limit whether the field modified by the first and second fields are in the same message, nor do they limit a sequence of the first and second fields. For another example, if the object described is a level, the ordinal numbers before "level" in first and second levels do not limit a priority between levels. For another example, the number of objects described is not limited by the ordinal number and can be one or more. Taking the first device as an example, the number of devices can be one or more.Furthermore, objects modified by different prefixed words can be the same or different; for example, if a described object is "device," "first device" and "second device" can be the same device or different devices, and their types can be the same or different. And, for another example, if a described object is "information," "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0094] Modes of description such as at least one (at least one item, at least one piece) of A, B, C..., A and / or B and / or C... in the embodiments of this disclosure include a case where any one of A, B, C... exists alone, and also include any combination of any multiple of A, B, C..., and each case may exist alone. For example, at least one of A, B, C includes cases where A, B, C exists alone, the combination A and B exists, the combination A and C exists, the combination B and C exists, and the combination A and B and C exists. For example, A and / or B includes cases where A exists alone, B exists alone, and there is a combination of A and B.

[0095] In some modalities, “in one case, A; in another case, B”, “in response to one case, A; in response to another case, B” and similar may include the following technical solutions, according to the Petition 870250091214, dated 06 / 10 / 2025, p. 207 / 353 21 / 154 cases. A is performed independently of B, i.e., in some modalities, A. B is performed independently of A, i.e., in some modalities, B. A and B are performed selectively, i.e., A or B is selected to be performed in some modalities. A and B are both performed, i.e., A and B in some modalities. The situation is also similar when there are more branches, such as A, B, and C.

[0096] In some embodiments, “comprising A”, “including A”, “indicating A” and “carrying A” may be interpreted as directly carrying A, or may be interpreted as indirectly indicating A.

[0097] In some forms, the terms “in response to”, “in response to the determination that”, “in the event of”, “while”, “when”, “in the event of”, “if” and similar terms may be interchangeable.

[0098] In some modalities, terms such as “greater than”, “greater than or equal to”, “not less than”, “more than”, “more than”, “greater than or equal to”, “not less than”, “greater than”, “greater than or equal to”, “not less than” and “above” can be substituted for each other, and terms such as “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “not greater than”, “less than or equal to”, “not greater than” and “below” can be substituted for each other.

[0099] In some applications, terms such as “radio”, “wireless”, “radio access network (RAN)”, “access network (AN)” and “RAN-based” may be interchangeable.

[00100] In some modalities, “predetermined” and “predefined” may be interpreted as pre-specified in a protocol, or may be interpreted as performing a predefined action by a device or similar.

[00101] In some modalities, the device and similar may Petition 870250091214, dated 06 / 10 / 2025, pp. 208 / 353 22 / 154 can be interpreted as physical or virtual, and their names are not limited to the names described in the modalities, and terms such as “device”, “equipment”, “device”, “network element”, “node”, “function”, “unit”, “entity”, “system”, “chip”, “chip system” and “body” can be interchangeable.

[00102] In some modalities, information and similar names are not limited to the names described in the modalities, and terms such as “information”, “message”, “signaling”, “report”, “configuration”, “indication”, “parameter” and “data” may be interchangeable.

[00103] In some modalities, terms such as “instruction” and “program” may be interchangeable.

[00104] In some modalities, “obtain”, “acquire”, “derive”, “receive” and “transmit (send and / or receive)” can be substituted for each other and can be interpreted as a plurality of meanings, such as receiving from another subject, obtaining from a protocol, processing by oneself and implementing autonomously.

[00105] In some modalities, “send”, “report”, “deliver” and “transmit (send and / or receive)” can be used interchangeably.

[00106] In some cases, the data, information and similar items acquired comply with the laws and regulations of the country where the data is located.

[00107] In some modalities, data, information and the like may be obtained after obtaining the user's consent.

[00108] Furthermore, each element, each row or each column in the embodiments table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row or any column can also be implemented as an independent embodiment.

[00109] It should be noted that all self-acquisition actions Petition 870250091214, dated 06 / 10 / 2025, pp. 209 / 353 23 / 154 Any information or data in this disclosure is provided under the premise of compliance with the relevant data protection regulations of the local country and obtaining authorization from the owner of the corresponding device.

[00110] In the embodiments of the present disclosure, although the operations are described in a specific order in the drawings, this should not be understood as requiring that these operations be performed in the specific order shown or in a serial order, or requiring that all the operations shown be performed to obtain the desired results. In certain circumstances, multitasking and parallel processing may be advantageous. Furthermore, it is also advantageous to send multiple pieces of information through the same message.

[00111] The following describes an application environment for a data transmission method according to some modalities.

[00112] FIG. 1a is a schematic structural diagram illustrating a communication system according to an embodiment of the present disclosure. As shown in FIG. 1a, a communication system 100 includes a terminal device 101, a network access device (RAN) 102 and a core network device 103.

[00113] In some embodiments, the communication system 100 is, for example, a long-term evolution (LTE) system, a 5th generation (5G) mobile communications system, a new 5G radio (NR) system or other future communications system, but is not limited to them.

[00114] In some embodiments, the terminal device 101 is, for example, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), a mobile phone, a wearable device, an Internet of Things device, a car with a communication function, a smart car, a tablet (Pad), a computer Petition 870250091214, dated 06 / 10 / 2025, page 210 / 353 24 / 154 with a wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in autonomous driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transport security, a wireless terminal device in a smart city, or a wireless terminal device in a smart home.

[00115] In some embodiments, the access network device 102 is, for example, a transmit-receive point (TRP), an evolved NodeB (eNB), a next-generation NodeB (gNB) in an NR system, a base station in another future communication system, or an access node in a wireless fidelity (WiFi) system, but is not limited to these. In some embodiments, the access network device may include a central unit (CU) and a distributed unit (DU), where the CU may also be called the control unit. The protocol layers of the access network device may be divided using a CU-DU structure, the functions of some protocol layers are centrally controlled by the CU, the functions of some or all of the remaining protocol layers are distributed in the DU, and the CU centrally controls the DU, but is not limited to this.

[00116] In some embodiments, the core network device 103 may be a device, including one or more network elements, or it may be a plurality of devices or groups of devices, each including all or some functions of one or more network elements. The network element may be virtual or physical.

[00117] It can be understood that the communication system described in the modalities of this disclosure is intended to illustrate more clearly the technical solutions of the modalities of this disclosure. Petition 870250091214, dated 06 / 10 / 2025, p. 211 / 353 25 / 154 tion and does not constitute a limitation on the technical solutions provided in the embodiments of this disclosure. Those skilled in the art may know that, with the evolution of system architectures and the emergence of new service scenarios, the technical solutions provided in the embodiments of this disclosure are also applicable to similar technical problems.

[00118] The following embodiments of the present disclosure may be applied to communication system 100 or to some of the main bodies shown in FIG. 1, but are not limited to them. The main bodies shown in FIG. 1 are examples; the communication system may include all or part of the main bodies of FIG. 1, or may include other main bodies different from those in FIG. 1. The number of main bodies is arbitrary, and the connection relationship between the main bodies is illustrative. The main bodies may not be connected or may be connected, and the connection may be arbitrary, which may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection. Furthermore, the names of the communication system and the entities are not limited.

[00119] FIG. 1b is a schematic diagram illustrating another communication system according to an embodiment of the present disclosure. As shown in FIG. 1b, the communication system includes a terminal device, an access network device, a network element with access and mobility management (AMF) function, a network element with session management (SMF) function, and a network element with user plane function (UPF).

[00120] In some embodiments, the network element of the access and mobility management function is used for managing access and mobility of the terminal device on the mobile network, including providing a message transmission channel. Petition 870250091214, dated 06 / 10 / 2025, pp. 212 / 353 26 / 154 session management for the terminal device and the session management function, the provision of authentication and authentication functions for terminal device access, the maintenance of access points of the core network control plane of the terminal device and the access network device, and the like, and the name of the network element of the access and mobility management function is not limited to this.

[00121] In some embodiments, the session management function network element is used for session management of terminal devices on the mobile network, including tunnel maintenance, allocation and management of terminal device addresses, selection and control of the session management function network element, policy application, quality of service (QoS) control and the like, and the name of the session management function network element is not limited to this.

[00122] In some embodiments, the network element of the session management function is configured to route and forward a user plane data packet, including packet routing and forwarding, policy enforcement, traffic reporting, quality of service processing, and the like.

[00123] In some implementations, the access network device provides the core network device with an extended discontinuous receive cycle (eDRX) parameter configured for the terminal device. When downlink information arrives, a network element on the core network device, for example, the access and mobility management function network element, evaluates the reachability of the terminal device based on the extended discontinuous receive cycle parameter. If the evaluation result is negative, the access and mobility management function network element estimates the wait time and buffers the information. Petition 870250091214, dated 06 / 10 / 2025, pp. 213 / 353 27 / 154 downlink information and notifies another network element. For example, the session management function network element and the user plane function network element buffer downlink information. When the evaluation result is positive, the access network device is notified to switch the terminal device to a connected state (CONNECTED), and the access network device sends a message to the terminal device to complete the transmission of downlink information, thus implementing core network-terminated mobile communication (CN-based MT communication), where the name is not limited to this. For example, core network-terminated communication can also be called high-latency communication functions.

[00124] In some implementations, when the terminal device is in the inactive (INDACTIVE) state, the access network device requests and receives, based on the small data transmission (SDT) configured for the terminal device, downlink small data directed to the terminal device from a network element of the core network device, for example, a user plane function network element, and triggers the paging of the small data transmission. The terminal device sends a request to the access network device based on the paging, receives the small data delivered by the access network device, and sends small data to the user plane function network element through the access network device, thus implementing small data transmission, where the name of the same is not limited to that.For example, small-scale data transmission may also be called mobile-terminated small-scale data transmission (MT-SDT).

[00125] Based on the previous implementation, when evaluating the accessibility of the terminal device, such as the network element on the device Petition 870250091214, dated 06 / 10 / 2025, p. 214 / 353 28 / 154 of the core network, for example, the network element of the access and mobility management function, assesses the accessibility of the terminal device as inaccessible, it chooses to buffer the downlink information. Consequently, if the terminal device is equipped with small data transmission at this time, the small data that serves as downlink information must be buffered on the core network side, instead of being transmitted to the terminal device based on small data transmission.

[00126] FIG. 2a is a flowchart illustrating a data transmission method according to an embodiment of the present disclosure. As shown in FIG. 2a, the data transmission method can be applied to a core network device and includes the following step(s).

[00127] In step S210a, the first information sent by an access network device is received.

[00128] The initial information relates to the configuration status of the small data transmission of the terminal device.

[00129] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit (PDU) corresponding to the small data transmission configured for the terminal device; and a first Petition 870250091214, dated 06 / 10 / 2025, pp. 215 / 353 29 / 154 ro Quality of Service flow identifier corresponding to the small data transmission configured for the terminal device.

[00130] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00131] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00132] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00133] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00134] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00135] In some modes, the limit information indicates a data volume (datavolume), configured for the terminal device, of information that can be transmitted by means of small data transmission.

[00136] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission. Petition 870250091214, dated 06 / 10 / 2025, pp. 216 / 353 30 / 154 port configured for the terminal device.

[00137] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00138] In some embodiments, the initial information includes MT-SDT and / or MO-SDT (Mobile Originated-SDT) configuration information of the terminal device.

[00139] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with session management function, a network element with user plane function and the like.

[00140] In some modes, the network element of the access and mobility management function receives the first information sent by the access network device.

[00141] In some embodiments, the network element of the session management function receives the first information sent by the access network device.

[00142] In some embodiments, the network element of the user plane function receives the first information sent by the access network device.

[00143] In some modes, an initial message sent by an access network device is received, where the initial message carries the first information, and the first information is related to the configuration status of the data transmission of a terminal device.

[00144] In some embodiments, the first message is a control plane (CP) message; and the core network device receives the control plane message sent by the device of Petition 870250091214, dated 06 / 10 / 2025, pp. 217 / 353 31 / 154 access network.

[00145] In some embodiments, the first message is a user plane (UP) message; and the core network device receives the user plane message sent by the access network device.

[00146] In some embodiments, the first message is an idle state transition report message; and the core network device receives the idle state transition report message from the terminal device sent by the access network device. In some embodiments, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00147] It is specified in some embodiments of this disclosure that the core network device receives the first information sent by the access network device, where the first information relates to the small data transmission configuration status of the terminal device. Based on the first information, the core network device can learn about the small data transmission configuration status of the terminal device.

[00148] FIG. 2b is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 2b, the data transmission method can be applied to a core network device and includes the following step(s):

[00149] In step S210b, the first information sent by an access network device is received.

[00150] The first piece of information relates to the configuration status of the small data transmission of the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 218 / 353 32 / 154

[00151] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit (PDU) session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00152] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00153] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00154] In some embodiments, the first type of information indicates a direction of information transmission supported by the small data transmission configured for the terminal device. In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00155] In some modalities, the limit information indicates Petition 870250091214, dated 06 / 10 / 2025, pp. 219 / 353 33 / 154 a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00156] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00157] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00158] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00159] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00160] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00161] In some modes, the network element responsible for access and mobility management receives the initial information sent by the access network device.

[00162] In some embodiments, the session management function network element receives the first information sent by the access network device.

[00163] In some embodiments, the user plane function network element receives the first information sent by Petition 870250091214, dated 06 / 10 / 2025, pp. 220 / 353 34 / 154 network access device.

[00164] In some modes, a first message sent by an access network device is received, where the first message carries the first information, and the first information is related to the configuration status of the small data transmission of a terminal device.

[00165] In some embodiments, the first message is a control plane message; and the core network device receives the control plane message sent by the access network device.

[00166] In some embodiments, the first message is a user plane message; and the core network device receives the user plane message sent by the access network device.

[00167] In some embodiments, the first message is an idle state transition report message; and the core network device receives the idle state transition report message from the terminal device sent by the access network device. In some embodiments, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00168] In step S220b, it is determined, based on the first information, whether the buffered downlink information should be transmitted.

[00169] In some embodiments, downlink information includes signaling and / or buffered data to perform communication terminated on mobile devices based on the core network.

[00170] In some implementations, determine, based on the initial information, whether the stored downlink information Petition 870250091214, dated 06 / 10 / 2025, pp. 221 / 353 35 / 154 buffered data must be transmitted, including: Based on the initial indication information, determine that the terminal device is configured for small-scale data transmission and transmit the downlink information corresponding to that small-scale data transmission.

[00171] The initial information includes at least the initial indication information indicating whether the terminal device is configured with small data transmission. Optionally, the initial information may also include at least one of the following: a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00172] Optionally, if it is determined, based on the initial indication information, that the terminal device is configured for small data transmission, the downlink information corresponding to small data transmission is transmitted. Optionally, in response to the determination, based on the initial indication information, that the terminal device is configured for small data transmission, the downlink information corresponding to small data transmission is transmitted. Optionally, when it is determined, based on the initial indication information, that the terminal device Petition 870250091214, dated 06 / 10 / 2025, pp. 222 / 353 36 / 154 is configured with small data transmission; the downlink information corresponding to the small data transmission is transmitted.

[00173] In some implementations, determining, based on the first piece of information, whether buffered downlink information should be transmitted includes: Based on the initial indication information, determine that the terminal device is configured for small-scale data transmission and that the information in the downlink information belongs to a first type of information, transmitting the downlink information corresponding to small-scale data transmission.

[00174] The first piece of information includes at least one initial piece of information indicating whether the terminal device is configured with small data transmission and a first piece of information corresponding to the small data transmission configured for the terminal device. Optionally, the first piece of information may also include at least one of the following: an extended discontinuous receive cycle parameter configured for the terminal device; threshold information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00175] Optionally, if it is determined, based on the first indication information, that the terminal device is configured with small data transmission and that the information in the downlink information belongs to the first type of in Petition 870250091214, dated 06 / 10 / 2025, pp. 223 / 353 37 / 154 training, the downlink information corresponding to small data transmission is transmitted. Optionally, in response to the determination, based on the first indication information, that the terminal device is configured with small data transmission and that the information in the downlink information belongs to the first type of information, the downlink information corresponding to small data transmission is transmitted. Optionally, when it is determined, based on the first indication information, that the terminal device is configured with small data transmission and the information in the downlink information belongs to the first type of information, the downlink information corresponding to small data transmission is transmitted.

[00176] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00177] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00178] In some implementations, determining, based on the first piece of information, whether buffered downlink information should be transmitted includes: to determine, based on the initial indication information, Petition 870250091214, dated 06 / 10 / 2025, pp. 224 / 353 38 / 154 that the terminal device is configured with small data transmission, that the information in the downlink information belongs to the first type of information, and that an extended discontinuous receive cycle, represented by the extended discontinuous receive cycle parameter, is greater than or equal to a predefined cycle, transmitting downlink information corresponding to small data transmission.

[00179] The initial information includes at least: the first indication information indicating whether the terminal device is configured with small data transmission; the first type of information corresponding to the small data transmission configured for the terminal device; and the extended discontinuous receive cycle parameter configured for the terminal device. Optionally, the initial information may also include at least one of the following: limit information corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00180] Optionally, in a case where it is determined, based on the initial indication information, that the terminal device is configured for small data transmission, the information in the downlink information belongs to the first type of information, and the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to small data transmission is transmitted. Optionally, in response to the determination, based on the initial information Petition 870250091214, dated 06 / 10 / 2025, pp. 225 / 353 39 / 154 indication that the terminal device is configured for small data transmission, the information in the downlink information belongs to the first type of information, and the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to small data transmission is transmitted. Optionally, when it is determined, based on the first indication information, that the terminal device is configured for small data transmission, the information in the downlink information belongs to the first type of information and the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to small data transmission is transmitted.

[00181] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00182] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00183] In some modes, the predefined cycle is 10.24 seconds or greater than 10.24 seconds. Petition 870250091214, dated 06 / 10 / 2025, pp. 226 / 353 40 / 154

[00184] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: Based on the initial indication information, determine that the terminal device is configured for small data transmission, that the information in the downlink information belongs to the first type of information, that the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and that a data size of information belonging to the first type of information in the downlink information is less than or equal to a data limit represented by limit information, transmitting the downlink information corresponding to small data transmission.

[00185] The initial information includes at least: the initial indication information indicating whether the terminal device is configured with small data transmission; the first type of information corresponding to the small data transmission configured for the terminal device; the extended discontinuous receive cycle parameter configured for the terminal device; and the limit information corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00186] Optionally, in a case of determination, based on the first indication information, that the terminal device is Petition 870250091214, dated 06 / 10 / 2025, pp. 227 / 353 41 / 154 configured with small data transmission, the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted.Optionally, in response to the determination, based on the first indication information, that the terminal device is configured with small data transmission, the information in the downlink information belongs to the first information type, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the data size of the information belonging to the first information type in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to small data transmission is transmitted.Optionally, when it is determined, based on the initial indication information, that the terminal device is configured for small data transmission, the information in the downlink information belongs to the first information type, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the data size of the information belonging to the first information type in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to small data transmission is transmitted. Petition 870250091214, dated 06 / 10 / 2025, pp. 228 / 353 42 / 154

[00187] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00188] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00189] In some modes, the predefined cycle is 10.24 seconds or greater than 10.24 seconds.

[00190] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: Determine, based on the initial indication information, that the terminal device is configured for small data transmission, that the information in the downlink information belongs to the first type of information, that the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, that the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, and that a second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with a first one. Petition 870250091214, dated 06 / 10 / 2025, pp. 229 / 353 43 / 154 protocol data unit session identifier, and that a second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with a first quality of service flow identifier, transmitting the downlink information corresponding to the small data transmission.

[00191] The first information includes at least: the first indication information indicating whether the terminal device is configured with small data transmission; the first type of information corresponding to the small data transmission configured for the terminal device; the extended discontinuous receive cycle parameter configured for the terminal device; the limit information corresponding to the small data transmission configured for the terminal device; the first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and the first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00192] Optionally, if it is determined, based on the first indication information, that the terminal device is configured with small data transmission, the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information Petition 870250091214, dated 06 / 10 / 2025, pp. 230 / 353 44 / 154 The downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier; the downlink information corresponding to small data transmission is transmitted. Optionally, in response to the determination, based on the first indication information, that the terminal device is configured with small data transmission, the information in the downlink information belongs to the first type of information; the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle.If the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted. Optionally, when it is determined, based on the first indication information, that the terminal device is configured with small data transmission,The information in the downlink data belongs to the first type of information, the extended discontinuous receive cycle represented by the receive cycle parameter des. Petition 870250091214, dated 06 / 10 / 2025, pp. 231 / 353 45 / 154 continuous extended is greater than or equal to the predefined cycle, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.

[00193] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00194] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00195] In some modes, the predefined cycle is 10.24 seconds or greater than 10.24 seconds.

[00196] In some embodiments, when any of the session identifiers of the second protocol data unit is Petition 870250091214, dated 06 / 10 / 2025, pp. 232 / 353 46 / 154 consistent with the first protocol data unit session identifier and the second quality of service flow identifier is consistent with the first quality of service flow identifier, as well as other condition(s) in the previous implementation, are met, the downlink information corresponding to the small data transmission is transmitted.

[00197] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information, transmitting downlink information corresponding to small-scale data transmission.

[00198] The initial information includes at least the first type of information corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00199] Optionally, if the information in the downlink information belongs to the first type of information, the downlink information corresponding to the small data transmission is transmitted. Optionally, in response to the information in the Petition 870250091214, dated 06 / 10 / 2025, pp. 233 / 353 47 / 154 downlink formations belonging to the first type of information, the downlink information corresponding to small-scale data transmission is transmitted. Optionally, when the information in the downlink information belongs to the first type of information, the downlink information corresponding to small-scale data transmission is transmitted.

[00200] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information, and the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, transmitting the downlink information corresponding to small data transmission.

[00201] The first piece of information includes at least the first type of information corresponding to the small data transmission configured for the terminal device and the extended discontinuous receive cycle parameter configured for the terminal device. Optionally, the first piece of information may also include at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00202] Optionally, if the information in the down information Petition 870250091214, dated 06 / 10 / 2025, pp. 234 / 353 48 / 154 link belongs to the first information type and the extended discontinuous reception cycle represented by the extended discontinuous reception cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to the small data transmission is transmitted. Optionally, in response to the fact that the information in the downlink information belongs to the first information type and the extended discontinuous reception cycle represented by the extended discontinuous reception cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to the small data transmission is transmitted.Optionally, when the information in the downlink information belongs to the first type of information and the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the downlink information corresponding to the small data transmission is transmitted.

[00203] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00204] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00205] In some modes, the predefined cycle is 10.24 Petition 870250091214, dated 06 / 10 / 2025, pp. 235 / 353 49 / 154 seconds or greater than 10.24 seconds.

[00206] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information; the data size of the information belonging to the first type of information in the downlink information is less than or equal to a data limit represented by the limit information, transmitting the downlink information corresponding to small data transmission.

[00207] The initial information includes at least the first type of information corresponding to the small data transmission configured for the terminal device and the limit information corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; an extended discontinuous receive cycle parameter configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00208] Optionally, if the information in the downlink information belongs to the first type of information and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted. Optionally, Petition 870250091214, dated 06 / 10 / 2025, pp. 236 / 353 50 / 154 In response to this, the information in the downlink information belongs to the first type of information and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted. Optionally, when the information in the downlink information belongs to the first type of information and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted.

[00209] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00210] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00211] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information, a second session identifier of the unit. Petition 870250091214, dated 06 / 10 / 2025, pp. 237 / 353 51 / 154 protocol data corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and a second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier.

[00212] The initial information includes at least the first type of information corresponding to the small data transmission configured for the terminal device, the first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device, and the first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; an extended discontinuous receive cycle parameter configured for the terminal device; and limit information corresponding to the small data transmission configured for the terminal device.

[00213] Optionally, in the case where the information in the downlink information belongs to the first information type, the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first information type in the downlink information is consistent with the first quality of service flow identifier. Petition 870250091214, dated 06 / 10 / 2025, pp. 238 / 353 52 / 154 Quality of Service, the downlink information corresponding to the small data transmission is transmitted. Optionally, in response to the fact that the information in the downlink information belongs to the first type of information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.Optionally, when the information in the downlink information belongs to the first type of information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.

[00214] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the Petition 870250091214, dated 06 / 10 / 2025, pp. 239 / 353 53 / 154 terminal device.

[00215] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00216] In some embodiments, when either of the second protocol data unit session identifiers is consistent with the first protocol data unit session identifier and the second quality of service flow identifier is consistent with the first quality of service flow identifier, as well as other condition(s) in the previous implementation being met, the downlink information corresponding to the small data transmission is transmitted.

[00217] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first type of information; the extended discontinuous reception cycle represented by the extended discontinuous reception cycle parameter is greater than or equal to the predefined cycle; the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information; transmitting the downlink information corresponding to small data transmission.

[00218] The initial information includes at least: the first type of information corresponding to small data transmission configured for the terminal device; the extended discontinuous receive cycle parameter configured for the terminal device; and the limit information corresponding to the transmission of Petition 870250091214, dated 06 / 10 / 2025, pp. 240 / 353 54 / 154 small data configured for the terminal device. Optionally, the initial information may also include at least one of the following: initial indication information indicating whether the terminal device is configured for small data transmission; a first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00219] Optionally, in the case where the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted.Optionally, in response to the fact that the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted. Optionally, when the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, and the size... Petition 870250091214, dated 06 / 10 / 2025, pp. 241 / 353 55 / 154 If the data from the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the downlink information corresponding to the small data transmission is transmitted.

[00220] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00221] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00222] In some modes, the predefined cycle is 10.24 seconds or greater than 10.24 seconds.

[00223] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to the first information type; the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle; the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the... Petition 870250091214, dated 06 / 10 / 2025, pp. 242 / 353 56 / 154 protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, transmitting the downlink information corresponding to the small data transmission.

[00224] The initial information includes at least: the first type of information corresponding to the small data transmission configured for the terminal device; the extended discontinuous receive cycle parameter configured for the terminal device; the first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and the first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; and limit information corresponding to the small data transmission configured for the terminal device.

[00225] Optionally, if the information in the downlink information belongs to the first information type, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier .... Petition 870250091214, dated 06 / 10 / 2025, pp. 243 / 353 57 / 154 downlink information is consistent with the first quality of service flow identifier; downlink information corresponding to small data transmission is transmitted.Optionally, in response to the fact that the information in the downlink information belongs to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.Optionally, when the information in the downlink information belongs to the first information type, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first information type in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.

[00226] In some modalities, the fact that the information in the Petition 870250091214, dated 06 / 10 / 2025, pp. 244 / 353 58 / 154 downlink information belonging to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00227] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00228] In some modes, the predefined cycle is 10.24 seconds or greater than 10.24 seconds.

[00229] In some embodiments, when either of the session identifiers of the second protocol data unit is consistent with the first protocol data unit session identifier and the second quality of service flow identifier is consistent with the first quality of service flow identifier, as well as other condition(s) in the previous implementation are met, the downlink information corresponding to the small data transmission is transmitted.

[00230] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink information belongs to a first type of information; the data size of the information belonging to the first type of information in the downlink information is less than or equal to a data limit represented by the limit information, a second session identifier of the unit of Petition 870250091214, dated 06 / 10 / 2025, pp. 245 / 353 59 / 154 protocol data corresponding to the information belonging to the first type of information in the downlink information is consistent with a first session identifier of the protocol data unit, and a second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with a first quality of service flow identifier, transmitting the downlink information corresponding to the small data transmission.

[00231] The initial information includes at least: the first type of information corresponding to the small data transmission configured for the terminal device; the limit information corresponding to the small data transmission configured for the terminal device; the first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and the first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; and an extended discontinuous receive cycle parameter configured for the terminal device.

[00232] Optionally, in the case where the information in the downlink information belongs to the first type of information, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the boundary information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information. Petition 870250091214, dated 06 / 10 / 2025, pp. 246 / 353 60 / 154 downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.Optionally, in response to the fact that the information in the downlink information belongs to the first type of information, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.Optionally, when the information in the downlink information belongs to the first information type, the data size of the information belonging to the first information type in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type. Petition 870250091214, dated 06 / 10 / 2025, pp. 247 / 353 61 / 154 of information in the downlink information is consistent with the first quality of service flow identifier; the downlink information corresponding to the transmission of small data is transmitted.

[00233] In some embodiments, the fact that the information in the downlink information belongs to the first type of information includes the following cases: the information in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00234] In some embodiments, when at least some information in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00235] In some embodiments, when either of the second protocol data unit session identifiers is consistent with the first protocol data unit session identifier and the second quality of service flow identifier is consistent with the first quality of service flow identifier, as well as other condition(s) in the previous implementation are met, the downlink information corresponding to the small data transmission is transmitted.

[00236] In some implementations, determining, based on initial information, whether buffered downlink information should be transmitted includes: The information in the downlink data belongs to the first type of information, the discontinuous reception cycle extends Petition 870250091214, dated 06 / 10 / 2025, pp. 248 / 353 62 / 154 of the extended discontinuous reception cycle parameter is greater than or equal to the predefined cycle, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, transmitting the downlink information corresponding to the small data transmission.

[00237] The initial information includes at least: the first type of information corresponding to the small data transmission configured for the terminal device; the extended discontinuous receive cycle parameter configured for the terminal device; the limit information corresponding to the small data transmission configured for the terminal device; the first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and the first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Optionally, the initial information may also include an initial indication indicating whether the terminal device is configured with small data transmission.

[00238] Optionally, if the information in the downlink information belongs to the first type of information, the reception cycle Petition 870250091214, dated 06 / 10 / 2025, pp. 249 / 353 If the extended discontinuous reception cycle parameter is greater than or equal to the predefined cycle, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted. Optionally,In response to the fact that the information in the downlink information belongs to the first information type, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the data size of the information belonging to the first information type in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first information type in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first information type in the downlink information is consistent with the first quality of service flow identifier.The downlink information corresponding to small data transmissions is transmitted. Optionally, when the information in the downlink information per, Petition 870250091214, dated 06 / 10 / 2025, pages 250 / 353 64 / 154 percem to the first type of information, the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to the predefined cycle, the data size of the information belonging to the first type of information in the downlink information is less than or equal to the data limit represented by the limit information, the second session identifier of the protocol data unit corresponding to the information belonging to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier, the downlink information corresponding to the small data transmission is transmitted.

[00239] In some embodiments, the information contained in the downlink information belongs to the first type of information, including the following cases: the information contained in the downlink information belongs to the signaling corresponding to the small data transmission configured for the terminal device; and the information contained in the downlink information belongs to the data corresponding to the small data transmission configured for the terminal device.

[00240] In some embodiments, when at least some information contained in the downlink information belongs to the first type of information and another condition in the previous implementation is met, the downlink information corresponding to the small data transmission is transmitted.

[00241] In some modes, the standard cycle is 10.24 seconds or greater than 10.24 seconds. Petition 870250091214, dated 06 / 10 / 2025, pp. 251 / 353 65 / 154

[00242] In some embodiments, when either of the session identifiers of the second protocol data unit is consistent with the first protocol data unit session identifier and the quality of service flow identifier is consistent with the first quality of service flow identifier, as well as other condition(s) in the previous implementation being met, the downlink information corresponding to the small data transmission is transmitted.

[00243] In some embodiments, the core network device does not transmit buffered downlink information when at least one of the following is determined: the terminal device is not configured for small data transmission; the downlink information does not belong to the first information type; the extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is shorter than the predefined cycle; the data size of the information belonging to the first information type in the downlink information is greater than the data limit represented by the limit information; the second protocol data unit session identifier corresponding to the information belonging to the first information type in the downlink information is inconsistent with the first protocol data unit session identifier;and the second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is inconsistent with the first quality of service flow identifier.

[00244] It is specified in some embodiments of this disclosure that the core network receives the first information sent by the access network device and determines, based on the first information, whether to transmit the stored downlink information. Petition 870250091214, dated 06 / 10 / 2025, pp. 252 / 353 66 / 154 of the data is buffered, where the initial information relates to the small data transmission configuration status of the terminal device. Based on this initial information, the core network device can learn about the small data transmission configuration status of the terminal device and determine, based on the configuration status, whether to transmit the buffered downlink information to the terminal device, thus ensuring that the downlink information can arrive, reducing core network memory overhead, reducing terminal paging to a connected state by the core network due to insufficient memory, and also reducing signaling overhead and device power consumption.

[00245] FIG. 2c is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in Figure 2c, the data transmission method can be applied to a core network device and includes the following step(s).

[00246] In step S2101c, a first message sent by an access network device is received.

[00247] The first message carries the initial information, and the initial information relates to the configuration status of the small data transmission of the terminal device.

[00248] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00249] In some modalities, the network element of the access and mobility management function receives the first message. Petition 870250091214, dated 06 / 10 / 2025, page 253 / 353 67 / 154 gem sent by the access network device.

[00250] In some embodiments, the session management function network element receives the first message sent by the access network device.

[00251] In some embodiments, the user plane function network element receives the first message sent by the access network device.

[00252] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00253] In some modes, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00254] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00255] In some modalities, the first type of information Petition 870250091214, dated 06 / 10 / 2025, pp. 254 / 353 68 / 154 indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00256] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00257] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00258] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00259] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00260] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00261] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00262] It is specified in some embodiments of this disclosure that the core network device receives the first message sent by the access network device and learns about the small data transmission configuration status of the device. Petition 870250091214, dated 06 / 10 / 2025, pages 255 / 353 69 / 154 terminal based on the first message.

[00263] FIG. 2d is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 2d, the data transmission method can be applied to a core network device and includes the following step(s):

[00264] In step S2101d, a control plane message sent by an access network device is received.

[00265] The control plane message carries the initial information, and the initial information relates to the configuration status of the small data transmission of the terminal device.

[00266] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00267] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission. Petition 870250091214, dated 06 / 10 / 2025, pp. 256 / 353 70 / 154

[00268] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00269] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00270] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00271] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00272] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted through small data transmission.

[00273] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00274] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmissions configured for the terminal device.

[00275] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the device. Petition 870250091214, dated 06 / 10 / 2025, pages 257 / 353 71 / 154 terminal.

[00276] In some embodiments, the control plane message is a Next Generation Application Protocol (NGAP) message.

[00277] It is specified in some embodiments of this disclosure that the core network device receives the control plane message sent by the access network device and learns the small data transmission configuration status of the terminal device based on the control plane message.

[00278] Figure 2e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in Figure 2e, the data transmission method can be applied to a core network device and includes the following step(s).

[00279] In step S2101e, a user plan message sent by an access network device is received.

[00280] The first message carries the initial information, and the initial information relates to the configuration status of the small data transmission of the terminal device.

[00281] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 258 / 353 72 / 154 minai; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00282] In some modes, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00283] In some embodiments, the first type of information corresponding to the small-scale data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00284] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00285] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00286] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00287] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00288] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission. Petition 870250091214, dated 06 / 10 / 2025, pp. 259 / 353 73 / 154 port configured for the terminal device.

[00289] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00290] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00291] In some embodiments, the user plane message is a user plane message (GTP-U) of the General Packet Radio Service (GPRS) tunneling protocol. For example, a GTPU user plane message packet header carries the initial information.

[00292] It is specified in some embodiments of this disclosure that the core network device receives the user plane message sent by the access network device and learns about the small data transmission configuration status of the terminal device based on the user plane message.

[00293] FIG. 2f is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 2f, the data transmission method can be applied to a core network device and includes the following step(s):

[00294] In step S2101f, an inactive state transition report message from the terminal device sent by the access network device is received.

[00295] The inactive state transition report message carries the initial information, and the initial information relates to the small data transmission configuration status of the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 260 / 353 74 / 154

[00296] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00297] In some embodiments, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in a small data transmission.

[00298] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00299] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00300] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink. Petition 870250091214, dated 06 / 10 / 2025, pp. 261 / 353 75 / 154

[00301] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00302] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00303] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00304] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00305] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00306] In some modes, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00307] It is specified in some embodiments of this disclosure that the core network device receives the idle state transition report message from the terminal device sent by the access network device and learns about the small data transmission configuration status of the terminal device based on the idle state transition report message.

[00308] FIG. 2g is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, pp. 262 / 353 76 / 154 disclosure. As shown in FIG. 2g, the data transmission method can be applied to a core network device and includes the following step(s).

[00309] In the S210g stage, the first information sent by an access network device is received.

[00310] The initial information relates to the configuration status of the small data transmission of the terminal device.

[00311] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00312] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with session management function, a network element with user plane function and the like.

[00313] In some modes, the network element of the access and mobility management function receives the first information sent by the access network device. Petition 870250091214, dated 06 / 10 / 2025, pp. 263 / 353 77 / 154

[00314] In some embodiments, the network element of the session management function receives the first information sent by the access network device.

[00315] In some embodiments, the network element of the user plane function receives the first information sent by the access network device.

[00316] In some modes, an initial message sent by an access network device is received, where the initial message carries the first information, and the first information is related to the configuration status of the data transmission of a terminal device.

[00317] In some embodiments, the first message is a control plane message; and the core network device receives the control plane message sent by the access network device.

[00318] In some embodiments, the first message is a user plane message; and the core network device receives the user plane message sent by the access network device.

[00319] In some embodiments, the first message is an idle state transition report message; and the core network device receives the idle state transition report message from the terminal device sent by the access network device. In some embodiments, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00320] In step S220g, it is determined, based on the initial information, whether the buffered downlink information should be transmitted.

[00321] In some modes, downlink information in Petition 870250091214, dated 06 / 10 / 2025, pp. 264 / 353 78 / 154 include signaling and / or buffered data to perform core network-terminated mobile communication.

[00322] For an optional implementation of step S220g, reference may be made to an optional implementation of step S220b in FIG. 2b and other associated parts in the embodiments involved in FIG. 2b, which will not be repeated here.

[00323] In the S230g step, the transmission of buffered downlink information is determined, and downlink information corresponding to small data transmission is transmitted to the access network device based on the initial information.

[00324] The core network device determines whether to transmit the buffered downlink information based on the first information and then transmits, to the access network device based on the first information, the downlink information corresponding to the small data transmission configured for the terminal device.

[00325] Optionally, when determining the transmission of buffered downlink information, the downlink information corresponding to the small data transmission is transmitted to the access network device based on the first information. Optionally, in response to the determination of the transmission of buffered downlink information, the downlink information corresponding to the small data transmission is transmitted to the access network device based on the first information. Optionally, when determining the transmission of buffered downlink information, the downlink information corresponding to the small data transmission is transmitted to the access network device based on the first information. Petition 870250091214, dated 06 / 10 / 2025, pp. 265 / 353 79 / 154

[00326] It is specified in some embodiments of this disclosure that the core network device receives the initial information sent by the access network device, determines, based on the initial information, whether to transmit the buffered downlink information, and transmits, to the access network device based on the initial information, the downlink information corresponding to the small data transmission, where the initial information relates to the small data transmission configuration status of the terminal device.Based on the initial information, the core network device can learn about the small data transmission configuration status of the terminal device and determine, based on the configuration status, whether to transmit buffered downlink information to the terminal device and the specific content of the transmitted downlink information, so as to perform the small data transmission of the terminal device, thus ensuring the arrival of downlink information, reducing core network memory overhead, reducing terminal paging to a connected state by the core network due to insufficient memory, and also reducing signaling overhead and device power consumption.

[00327] FIG. 3a is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3a, the data transmission method can be applied to a core network device and includes the following step(s):

[00328] In step S310a, the second piece of information is sent to the access network device.

[00329] The second piece of information relates to terminated mobile communication based on the core network. Petition 870250091214, dated 06 / 10 / 2025, pp. 266 / 353 80 / 154

[00330] In some embodiments, the second information includes at least one of the following: second indication information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00331] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00332] In some embodiments, the network element of the access and mobility management function sends the second information to the access network device.

[00333] In some embodiments, the session management function network element sends the second piece of information to the access network device.

[00334] In some embodiments, the user plane function network element sends the second information to the access network device.

[00335] In some embodiments, a second message is sent to the access network device, where the second message carries the second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00336] In some embodiments, the second message is a control plane message; and the core network device sends the Petition 870250091214, dated 06 / 10 / 2025, pp. 267 / 353 81 / 154 message from the control plane to the access network device.

[00337] In some embodiments, the second message is a user plane message; and the core network device sends the user plane message to the access network device.

[00338] Some embodiments of this disclosure provide that the core network device sends second information to the access network device, where the second information relates to the core network-based terminated mobile communication. Based on this second information, the access network device can learn about the status of the core network-based terminated mobile communication on the core network side. Consequently, it can be understood that, when performing data transmission from the terminal device, the access network device can consider the status of the core network-based terminated mobile communication on the core network side.

[00339] FIG. 3b is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3b, the data transmission method can be applied to a core network device and includes the following step(s).

[00340] In step S3101b, a second message is sent to the access network device.

[00341] The second message carries a second piece of information, and that second piece of information relates to terminated mobile communication based on the core network.

[00342] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information. Petition 870250091214, dated 06 / 10 / 2025, pp. 268 / 353 82 / 154 buffered data; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00343] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with session management function, a network element with user plane function and the like.

[00344] In some modes, the network element with access and mobility management function sends the second message to the access network device.

[00345] In some modes, the network element with session management function sends the second message to the access network device.

[00346] In some embodiments, the network element with user plane function sends the second message to the access network device.

[00347] It is specified in some embodiments of this disclosure that the core network device sends the second message to the access network device, to notify the access network device about the status related to the terminated mobile communication based on the core network.

[00348] FIG. 3c is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3c, the data transmission method can be applied to a core network device and includes the following step(s). Petition 870250091214, dated 06 / 10 / 2025, pp. 269 / 353 83 / 154

[00349] In step S3101c, a control plane message is sent to the access network device.

[00350] The control plane message carries a second piece of information, and that second piece of information relates to the terminated mobile communication based on the core network.

[00351] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00352] In some embodiments, the control plane message is a next-generation application protocol message.

[00353] Some embodiments of this disclosure provide that the core network device sends the control plane message to the access network device to inform it of the status related to the terminated mobile communication based on the core network.

[00354] FIG. 3d is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3d, the data transmission method can be applied to a core network device and includes the following step(s):

[00355] In step S3101d, a user plan message is sent to the access network device.

[00356] The user plan message loads a second Petition 870250091214, dated 06 / 10 / 2025, pp. 270 / 353 84 / 154 information, and the second piece of information relates to terminated mobile communication based on the core network.

[00357] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating a buffer start; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00358] In some embodiments, the user plane message is a General Packet Radio Service (GPRS) Tunneling Protocol User Plane (GTP-U) message and, for example, a packet header of the GTP-U message carries the second piece of information.

[00359] Some embodiments of this disclosure provide that the core network device sends the user plan message to the access network device to inform it of the status related to the terminated mobile communication based on the core network.

[00360] FIG. 3e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3e, the data transmission method can be applied to a core network device and includes the following step(s).

[00361] In step S310e, the second piece of information is sent to the access network device.

[00362] The second piece of information relates to communication. Petition 870250091214, dated 06 / 10 / 2025, pp. 271 / 353 85 / 154 mobile terminated based on the core network.

[00363] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating a buffer start; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00364] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00365] In some embodiments, the network element of the access and mobility management function sends the second piece of information to the access network device.

[00366] In some embodiments, the session management function network element sends the second piece of information to the access network device.

[00367] In some embodiments, the user plane function network element sends the second piece of information to the access network device.

[00368] In some embodiments, a second message is sent to the access network device, where the second message carries the second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00369] In some modes, the second message is a Petition 870250091214, dated 06 / 10 / 2025, pp. 272 / 353 86 / 154 control plane message; and the core network device sends the control plane message to the access network device.

[00370] In some embodiments, the second message is a user plane message; and the core network device sends the user plane message to the access network device.

[00371] In step S320e, the third piece of information sent by the access network device is received.

[00372] In some embodiments, the third piece of information includes at least one of the following: a third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00373] In some modes, the access network device determines, based on the second piece of information received, whether to send the third piece of information to the core network device.

[00374] In step S330e, it is determined, based on third-party information, whether downlink information corresponding to small data transmission should be transmitted.

[00375] Some embodiments of this disclosure provide that the core network device sends the second piece of information to the access network device, where the second piece of information relates to the terminated mobile communication based on the core network; based on the second piece of information, the access network device can know the status related to the terminated mobile communication based on the core network; the core network device receives the third piece of information. Petition 870250091214, dated 06 / 10 / 2025, pp. 273 / 353 87 / 154 analyzed, according to the second piece of information, and sent by the access network device, and determines whether to transmit the downlink information corresponding to the small data transmission according to the third piece of information, so that the terminal device's reception capacity for the downlink information can be considered when performing the terminal device's data transmission.

[00376] FIG. 3f is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 3f, the data transmission method can be applied to a core network device and includes the following step(s).

[00377] In step S31 Of, the second piece of information is sent to the access network device.

[00378] The second piece of information relates to terminated mobile communication based on the core network.

[00379] In some embodiments, the second information includes at least one of the following: second indication information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00380] In some embodiments, the core network device includes an access and mobility management function network element, a sesPetição 870250091214, dated 06 / 10 / 2025, p. 274 / 353 88 / 154 are a network element of user plane function and similar.

[00381] In some embodiments, the network element of the access and mobility management function sends the second information to the access network device.

[00382] In some embodiments, the session management function network element sends the second piece of information to the access network device.

[00383] In some embodiments, the user plane function network element sends the second information to the access network device.

[00384] In some embodiments, a second message is sent to the access network device, where the second message carries a second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00385] In some embodiments, the second message is a control plane message; and the core network device sends the control plane message to the access network device.

[00386] In some embodiments, the second message is a user plane message; and the core network device sends the user plane message to the access network device.

[00387] In step S320f, the third piece of information sent by the access network device is received.

[00388] In some embodiments, the third piece of information includes at least one of the following: third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth identifier of Petition 870250091214, dated 06 / 10 / 2025, pp. 275 / 353 89 / 154 service quality flow corresponding to the downlink information that the terminal device is able to receive.

[00389] In some modes, the access network device determines, based on the second piece of information received, the sending of the third piece of information to the core network device.

[00390] In step S330f, it is determined, based on third-party information, whether downlink information corresponding to small data transmission should be transmitted.

[00391] In step S340f, it is determined that downlink information corresponding to small data transmission must be transmitted to the access network device based on third-party information.

[00392] The core network device determines, based on third-party information, the sending of downlink information corresponding to small data transmission and transmits, to the access network device based on third-party information, the downlink information corresponding to small data transmission configured for the terminal device.

[00393] Optionally, in the case of determining the transmission of downlink information corresponding to small data transmission, the downlink information corresponding to small data transmission is transmitted to the access network device based on third-party information. Optionally, in response to the determination of the transmission of downlink information corresponding to small data transmission, the downlink information corresponding to small data transmission is transmitted to the access network device based on third-party information. Optionally, when it is determined that the downlink information corresponding to small data transmission is transmitted to the device Petition 870250091214, dated 06 / 10 / 2025, pp. 276 / 353 90 / 154 network access based on third-party information.

[00394] Some embodiments of this disclosure provide that the core network device sends the second piece of information to the access network device, where the second piece of information relates to the terminated mobile communication based on the core network; based on the second piece of information, the access network device can know the status related to the terminated mobile communication based on the core network;Then, the core network device receives the third analyzed piece of information, based on the second piece of information sent by the access network device, and determines whether to transmit the downlink information corresponding to the small data transmission according to the third piece of information, so that the terminal device's reception capacity for the downlink information can be considered when performing the terminal device's data transmission, and the downlink information corresponding to the small data transmission configured for the terminal device can be transmitted according to the third piece of information.

[00395] FIG. 4a is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 4a, the data transmission method can be applied to an access network device and includes the following step(s).

[00396] In step S410a, the first information is sent to a core network device.

[00397] The initial information relates to the configuration status of the small data transmission of the terminal device.

[00398] In some modalities, the initial information includes at least one of the following: initial indication information Petition 870250091214, dated 06 / 10 / 2025, pp. 277 / 353 91 / 154 indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00399] In some embodiments, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00400] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00401] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00402] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00403] In some modes, the limit information indicates a data size, configured for the terminal device, of in Petition 870250091214, dated 06 / 10 / 2025, pp. 278 / 353 92 / 154 formations that can be transmitted via small data transmission.

[00404] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted through small data transmission.

[00405] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00406] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00407] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00408] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00409] In some modes, the first information is sent to a network element with an access and mobility management function.

[00410] In some modes, the first information is sent to a session management function network element.

[00411] In some embodiments, the first information is sent to a user plane function network element.

[00412] In some modes, a first message is sent to the core network device, where the first message carries Petition 870250091214, dated 06 / 10 / 2025, pp. 279 / 353 93 / 154 the first piece of information, and the first piece of information is related to the data transmission configuration status of a terminal device.

[00413] In some embodiments, the first message is a control plane message; and the access network device sends the control plane message to the core network device.

[00414] In some embodiments, the first message is a user plane message; and the access network device sends the user plane message to the core network device.

[00415] It is specified in some embodiments of this disclosure that the access network device sends the first information to the core network device, where the first information relates to the small data transmission configuration status of the terminal device. Based on the first information, the core network device can learn about the small data transmission configuration status of the terminal device.

[00416] FIG. 4b is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 4b, the data transmission method can be applied to an access network device and includes the following step(s):

[00417] In step S4101b, a first message is sent to the core network device.

[00418] The first message carries the first information, and the first information is related to the configuration status of the small data transmission of the terminal device.

[00419] In some forms, the initial information includes at least one of the following: initial indication information that indicates Petition 870250091214, dated 06 / 10 / 2025, pp. 280 / 353 94 / 154 if the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit (PDU) session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00420] In some modes, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00421] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00422] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00423] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00424] In some modes, the limit information indicates a data size, configured for the terminal device, of in Petition 870250091214, dated 06 / 10 / 2025, pp. 281 / 353 95 / 154 training sessions that can be transmitted via small-scale data transmission.

[00425] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00426] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00427] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00428] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00429] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00430] In some modes, the first message is sent to a network element with an access and mobility management function.

[00431] In some modes, the first message is sent to a session management function network element.

[00432] In some embodiments, the first message is sent to a user plane function network element.

[00433] It is specified in some forms of this disclosure Petition 870250091214, dated 06 / 10 / 2025, pp. 282 / 353 96 / 154 that the access network device sends the first message to the core network device, to notify the core network device about the configuration status of the access network device for small data transmission from the terminal device.

[00434] Figure 4c is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in Figure 4c, the data transmission method can be applied to an access network device and includes the following step(s).

[00435] In step S4101c, a control plane message is sent to the core network device.

[00436] The control plane message carries the first piece of information, and the first piece of information relates to the configuration status of the small data transmission of the terminal device.

[00437] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit (PDU) session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00438] In some modalities, the first type of information Petition 870250091214, dated 06 / 10 / 2025, pp. 283 / 353 97 / 154 indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00439] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00440] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00441] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00442] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00443] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted through small data transmission.

[00444] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00445] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the Petition 870250091214, dated 06 / 10 / 2025, pp. 284 / 353 98 / 154 terminal device.

[00446] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00447] In some embodiments, the control plane message is a next-generation application protocol message.

[00448] It is specified in some embodiments of this disclosure that the access network device sends the control plane message to the core network device, to notify the core network device about the configuration status of the access network device for small data transmission from the terminal device.

[00449] FIG. 4d is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 4d, the data transmission method can be applied to an access network device and includes the following step(s).

[00450] In step S4101d, a user plane message is sent to the core network device.

[00451] The user plan message carries the initial information, and the initial information relates to the configuration status of the small data transmission of the terminal device.

[00452] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; an initial information type corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; informs Petition 870250091214, dated 06 / 10 / 2025, pp. 285 / 353 99 / 154 limit settings corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit (PDU) corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00453] In some modes, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00454] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00455] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00456] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00457] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00458] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted through the transmission of Petition 870250091214, dated 06 / 10 / 2025, pp. 286 / 353 100 / 154 small data points.

[00459] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00460] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmissions configured for the terminal device.

[00461] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00462] In some embodiments, the user plane message is a General Packet Radio Service (GPRS) Tunneling Protocol User Plane (GTP-U) message and, for example, a GTP-U message packet header carries the initial information.

[00463] In some embodiments of this disclosure, the access network device sends the user plane message to the core network device, to notify the core network device about the configuration status of the access network device for small data transmissions from the terminal device.

[00464] FIG. 4e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 4e, the data transmission method can be applied to an access network device and includes the following step(s).

[00465] In step S4101e, an inactive state transition report message from the terminal device is sent to the core network device. Petition 870250091214, dated 06 / 10 / 2025, pp. 287 / 353 101 / 154

[00466] The inactive state transition report message carries the first information, and the first information relates to the small data transmission configuration status of the terminal device.

[00467] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00468] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00469] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00470] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 288 / 353 102 / 154

[00471] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00472] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00473] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00474] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00475] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00476] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00477] In some modes, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00478] It is specified in some embodiments of this disclosure that the access network device sends the idle state transition report message to the core network device, to notify it of the configuration status of the access network device. Petition 870250091214, dated 06 / 10 / 2025, p. 289 / 353 103 / 154 ra small data transmission from the terminal device.

[00479] FIG. 4f is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in Figure 4f, the data transmission method can be applied to an access network device and includes the following step(s):

[00480] In the S410f stage, the first information is sent to a core network device.

[00481] The first piece of information relates to the configuration status of the small data transmission of the terminal device.

[00482] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00483] In some modes, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small data transmission.

[00484] In some modalities, the first type of information Petition 870250091214, dated 06 / 10 / 2025, pp. 290 / 353 104 / 154 corresponding to small-scale data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00485] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00486] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00487] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00488] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00489] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00490] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00491] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device. Petition 870250091214, dated 06 / 10 / 2025, pp. 291 / 353 105 / 154

[00492] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00493] In some modes, the initial information is sent to a network element with an access and mobility management function.

[00494] In some modes, the initial information is sent to a session management function network element.

[00495] In some embodiments, the first information is sent to a user plane function network element.

[00496] In some modes, an initial message is sent to the core network device, where the initial message carries the first information, and the first information is related to the configuration status of the data transmission of a terminal device.

[00497] In some embodiments, the first message is a control plane message; and the access network device sends the control plane message to the core network device.

[00498] In some embodiments, the first message is a user plane message; and the access network device sends the user plane message to the core network device.

[00499] In the S420f stage, downlink information is received, corresponding to the transmission of small data from a core network device based on the initial information.

[00500] Downlink information, which is transmitted by the core network device based on the initial information and which corresponds to the data transmission from a terminal device configured for the terminal device, is received. Petition 870250091214, dated 06 / 10 / 2025, pp. 292 / 353 106 / 154

[00501] It is specified in some embodiments of this disclosure that the access network device sends the first information to the core network device, so that the core network device determines, based on the first information, whether to transmit the buffered downlink information and transmits, to the access network device, based on the first information, the downlink information corresponding to the small data transmission, where the first information relates to the small data transmission configuration status of the terminal device.Based on the initial information, the core network device can learn about the small data transmission configuration status of the terminal device and determine, based on the configuration status, whether to transmit the buffered downlink information to the terminal device and the specific content of the transmitted downlink information, so as to perform the small data transmission of the terminal device, thus ensuring the arrival of downlink information, reducing core network memory overhead, reducing terminal paging to a connected state by the core network due to insufficient memory, and also reducing signaling overhead and device power consumption.

[00502] FIG. 4g is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 4g, the data transmission method can be applied to an access network device and includes the following step(s).

[00503] In the S410g stage, the first information is sent to the core network device.

[00504] The first piece of information relates to the configuration status of the small data transmission device. Petition 870250091214, dated 06 / 10 / 2025, pp. 293 / 353 107 / 154 terminal.

[00505] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00506] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00507] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data.

[00508] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00509] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, Petition 870250091214, dated 06 / 10 / 2025, pp. 294 / 353 108 / 154 downlink or uplink and downlink.

[00510] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00511] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00512] In some embodiments, the first session identifier of the protocol data unit indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00513] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00514] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00515] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00516] In some modes, the initial information is sent to a network element with an access and mobility management function.

[00517] In some modes, the initial information is sent to a session management function network element. Petition 870250091214, dated 06 / 10 / 2025, pages 295 / 353 109 / 154

[00518] In some embodiments, the first information is sent to a user plane function network element.

[00519] In some embodiments, an initial message is sent to a core network device, where the initial message carries the first information, and the first information is related to the configuration status of the data transmission of a terminal device.

[00520] In some embodiments, the first message is a control plane message; and the access network device sends the control plane message to the core network device.

[00521] In some embodiments, the first message is a user plane message; and the access network device sends the user plane message to the core network device.

[00522] In the S420g stage, downlink information, corresponding to the transmission of small data that is transmitted by the core network device based on the initial information, is received.

[00523] Downlink information, which is transmitted by the core network device based on the initial information and which corresponds to the small data transmission configured for the terminal device, is received.

[00524] In the S430g stage, the downlink information transmitted by the core network device is transmitted to the terminal device via small data transmission.

[00525] Downlink information that is transmitted by the core network device and that corresponds to the small data transmission configured for the terminal device is sent to the terminal device via small data transmission.

[00526] It is specified in some forms of this disclosure Petition 870250091214, dated 06 / 10 / 2025, pp. 296 / 353 110 / 154 that the access network device sends the first information to the core network device, so that the core network device determines, based on the first information, whether to transmit the buffered downlink information and transmits, to the access network device, based on the first information, the downlink information corresponding to the small data transmission, where the first information is related to the small data transmission configuration status of the terminal device.Based on the initial information, the core network device can learn about the small data transmission configuration status of the terminal device and determine, based on the configuration status, whether to transmit buffered downlink information to the terminal device and the specific content of the transmitted downlink information. The access network device then transmits the downlink information to the terminal device after receiving it, thus performing the small data transmission of the terminal device. This ensures that downlink information can reach the terminal, reducing core network memory overhead, reducing terminal paging by the core network to a connected state due to insufficient memory, and reducing signaling overhead and device power consumption.

[00527] FIG. 5a is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5a, the data transmission method can be applied to an access network device and includes the following step(s).

[00528] In step S510a, the second piece of information sent by the core network device is received.

[00529] The second piece of information relates to communication. Petition 870250091214, dated 06 / 10 / 2025, pp. 297 / 353 111 / 154 mobile terminated based on the core network.

[00530] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00531] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00532] In some modes, the second piece of information sent by the network element for access and mobility management is received.

[00533] In some modes, the second piece of information sent by the session management function network element is received.

[00534] In some modes, the second piece of information sent by the functional network element of the user plane is received.

[00535] In some modes, a second message sent by the core network device is received, where the second message carries the second piece of information, and the second piece of information is related to the mobile network-terminated communication based on the core network.

[00536] In some modes, the second message is a Petition 870250091214, dated 06 / 10 / 2025, pp. 298 / 353 112 / 154 control plane message; and the access network device receives the control plane message sent by the core network device.

[00537] In some embodiments, the second message is a user plane message; and the access network device receives the user plane message sent by the core network device.

[00538] Some embodiments of this disclosure provide that the access network device receives second information sent by the core network device, where the second information relates to mobile network-terminated communication based on the core network. Based on this second information, the access network device can learn about the status of the mobile network-terminated communication based on the core network on the core network side. Consequently, it can be understood that, when performing data transmission from the terminal device, the access network device can consider the status of the mobile network-terminated communication on the core network side.

[00539] FIG. 5b is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5b, the data transmission method can be applied to an access network device and includes the following step(s).

[00540] In step S510b, the second piece of information sent by the core network device is received.

[00541] The second piece of information relates to terminated mobile communication based on the core network.

[00542] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to Petition 870250091214, dated 06 / 10 / 2025, pp. 299 / 353 113 / 154 buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00543] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00544] In some modes, the second piece of information sent by the network element for access and mobility management is received.

[00545] In some modes, the second piece of information sent by the session management function network element is received.

[00546] In some embodiments, the second piece of information sent by the user plane function network element is received.

[00547] In some modes, a second message sent by the core network device is received, where the second message carries the second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00548] In some embodiments, the second message is a control plane message; and the access network device receives the control plane message sent by the core network device.

[00549] In some embodiments, the second message is a user plane message; and the access network device re Petition 870250091214, dated 06 / 10 / 2025, pages 300 / 353 114 / 154 receives the user piano message sent by the core network device.

[00550] In step S520b, it is determined, based on the second piece of information, whether the third piece of information should be sent to the core network device.

[00551] The third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00552] In some embodiments, to determine, based on the second piece of information, whether the third piece of information should be sent to the core network device, it is determined whether the third piece of information should be sent to the core network device in at least one of the following cases: there is downlink information buffered in the core network device; the information in the downlink information belongs to a small data transmission type corresponding to the small data transmission configured for the terminal device; a buffer time represented by time information corresponding to the downlink information is less than or equal to an extended discontinuous receive cycle represented by an extended discontinuous receive cycle parameter configured for the terminal device;a data size of information belonging to the small data transmission type in downlink information is less than or equal to a data limit corresponding to small data transmission configured for the terminal device; a third session identifier of the protocol data unit of information belonging to the small data transmission type in downlink information consists; Petition 870250091214, dated 06 / 10 / 2025, pp. 301 / 353 115 / 154 attempts with a first session identifier of the protocol data unit corresponding to the small data transmission configured for the terminal device; and a third quality of service flow identifier of the information belonging to the small data transmission type in the downlink information is consistent with a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device. Consequently, the sending of the third information to the core network device is determined.

[00553] In some embodiments, the existence of downlink information buffered in the core network device is determined based on the second indication information.

[00554] In some embodiments, it is determined, based on a second type of information, that the information in the downlink information belongs to the small data transmission type corresponding to the small data transmission configured for the terminal device.

[00555] In some embodiments, the third piece of information includes at least one of the following: a third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00556] In some forms of this disclosure, the access network device receives the second piece of information sent by the device. Petition 870250091214, dated 06 / 10 / 2025, pp. 302 / 353 116 / 154 The core network device determines, based on the second piece of information, whether to send the third piece of information to the core network device, where the second piece of information relates to mobile communication terminated on the core network, and the third piece of information is used to notify the core network device that the terminal device can receive downlink information. Based on the second piece of information, the access network device can learn about the status of mobile communication terminated on the core network on the core network side. Thus, when performing data transmission from the terminal device, the access network device can consider the status of mobile communication terminated on the core network on the core network side and determine whether to send the third piece of information to notify the core network device that the terminal device can receive downlink information.

[00557] FIG. 5c is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5c, the data transmission method can be applied to an access network device and includes the following step(s):

[00558] In step S5101c, a second message sent by the core network device is received.

[00559] The second message carries the second piece of information, and the second piece of information relates to terminated mobile communication based on the core network.

[00560] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the information of Petition 870250091214, dated 06 / 10 / 2025, pages 303 / 353 117 / 154 buffered downlink data; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00561] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with session management function, a network element with user plane function and the like.

[00562] In some modes, a second message sent by the network element with access and mobility management function is received.

[00563] In some modes, a second message sent by the network element with session management function is received.

[00564] In some modes, a second message sent by the network element with user plane function is received.

[00565] Some embodiments of this disclosure provide that the access network device receives the second message sent by the core network device, so as to acquire the status related to terminated mobile communication based on the core network on the core network side.

[00566] FIG. 5d is a flowchart illustrating another method of data transmission, according to an embodiment of the present disclosure. As shown in FIG. 5d, the data transmission method can be applied to an access network device and includes the following step(s).

[00567] In step S5101d, a control plane message sent by a core network device is received. Petition 870250091214, dated 06 / 10 / 2025, pp. 304 / 353 118 / 154

[00568] The control plane message carries a second piece of information, and that second piece of information relates to the terminated mobile communication based on the core network.

[00569] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating a buffer start; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00570] In some embodiments, the control plane message is a next-generation application protocol message.

[00571] Some embodiments of this disclosure provide that the access network device receives the control plane message sent by the core network device, so as to acquire the status related to terminated mobile communication based on the core network on the core network side.

[00572] FIG. 5e is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5e, the data transmission method can be applied to an access network device and includes the following step(s):

[00573] In step S5101e, a user plane message sent by a core network device is received.

[00574] The user plan message carries a second piece of information, and that second piece of information relates to communication. Petition 870250091214, dated 06 / 10 / 2025, pages 305 / 353 119 / 154 mobile terminated based on the core network.

[00575] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating a buffer start; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00576] In some embodiments, the user plane message is a General Packet Radio Service (GPRS) Tunneling Protocol User Plane (GTP-U) message and, for example, a packet header of the GTP-U message carries the second piece of information.

[00577] Some embodiments of this disclosure provide that the access network device receives the user plan message sent by the core network device, so as to acquire the status related to terminated mobile communication based on the core network on the core network side.

[00578] FIG. 5f is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5f, the data transmission method can be applied to an access network device and includes the following step(s).

[00579] In step S51 Of, the second piece of information sent by the core network device is received.

[00580] The second piece of information relates to communication. Petition 870250091214, dated 06 / 10 / 2025, pages 306 / 353 120 / 154 mobile terminated based on the core network.

[00581] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00582] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with session management function, a network element with user plane function and the like.

[00583] In some modes, the second piece of information sent by the network element of the access and mobility management function is received.

[00584] In some modes, the second piece of information sent by the network element of the session management function is received.

[00585] In some modes, the second piece of information sent by the network element of the user plane function is received.

[00586] In some modes, a second message sent by the core network device is received, where the second message carries the second piece of information, and the second piece of information is related to the mobile network-terminated communication based on the core network. Petition 870250091214, dated 06 / 10 / 2025, pages 307 / 353 121 / 154

[00587] In some embodiments, the second message is a control plane message; and the access network device receives the control plane message sent by the core network device.

[00588] In some embodiments, the second message is a user plane message; and the access network device receives the user plane message sent by the core network device.

[00589] In step S520f, it is determined, based on the second piece of information, whether the third piece of information should be sent to the core network device.

[00590] The third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00591] For an optional implementation of step S520f, the optional implementation of step S520b in FIG. 5b and other associated parts in the embodiments of FIG. 5b can be consulted, and the details are not described here again.

[00592] In step S530f, the sending of a third piece of information to the core network device is determined, and the third piece of information is generated based on the second piece of information.

[00593] In some embodiments, the third piece of information includes at least one of the following: a third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth session identifier of the Petition 870250091214, dated 06 / 10 / 2025, pp. 308 / 353 122 / 154 protocol data unit corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00594] In the S540f step, the third piece of information is sent to the core network device.

[00595] In some embodiments of this disclosure, the access network device receives the second piece of information sent by the core network device and determines, based on the second piece of information, whether to send the third piece of information to the core network device, where the second piece of information relates to the terminated mobile communication based on the core network, and the third piece of information is used to notify the core network device that the terminal device can receive the downlink information. Based on the second piece of information, the access network device can learn about the status of the terminated mobile communication based on the core network on the core network side.Consequently, when performing data transmission from the terminal device, the access network device can consider the status of the terminated mobile communication based on the core network on the core network side and send third-party information to notify the core network device that the terminal device can receive downlink information.

[00596] FIG. 5g is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5g, the data transmission method can be applied to an access network device and includes the following step(s).

[00597] In step S510g, the second piece of information sent by the core network device is received.

[00598] The second piece of information relates to communication. Petition 870250091214, dated 06 / 10 / 2025, pp. 309 / 353 123 / 154 mobile terminated based on the core network.

[00599] In some embodiments, the second piece of information includes at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00600] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00601] In some modes, the second piece of information sent by the network element for access and mobility management is received.

[00602] In some modes, the second piece of information sent by the network element of the session management function is received.

[00603] In some modes, the second piece of information sent by the network element of the user plane function is received.

[00604] In some modes, a second message sent by the core network device is received, where the second message carries the second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00605] In some embodiments, the second message is a message from the control plane; and the access network device re Petition 870250091214, dated 06 / 10 / 2025, pp. 310 / 353 124 / 154 receives the control plane message sent by the core network device.

[00606] In some embodiments, the second message is a user plane message; and the access network device receives the user plane message sent by the core network device.

[00607] In step S520g, it is determined, based on the second piece of information, whether the third piece of information should be sent to the core network device.

[00608] The third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00609] For an optional implementation of step S520g, the optional implementation of step S520b in FIG. 5b and other associated parts in the embodiments of FIG. 5b can be consulted, and the details are not described here again.

[00610] In the S530g step, the sending of the third piece of information to the core network device is determined, and the third piece of information is generated based on the second piece of information.

[00611] In some embodiments, the third piece of information includes at least one of the following: third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth identifier of Petition 870250091214, dated 06 / 10 / 2025, pp. 311 / 353 125 / 154 service quality flow corresponding to the downlink information that the terminal device is able to receive.

[00612] In the S540g step, the third piece of information is sent to the core network device.

[00613] In the S550g stage, downlink information, corresponding to small data transmission, which is transmitted by the core network device based on third-party information, is received.

[00614] Downlink information transmitted by the core network device based on third-party information and corresponding to the small data transmission configured for the terminal device is received.

[00615] In some embodiments of this disclosure, the access network device receives the second information sent by the core network device and determines, based on the second information, whether to send the third information to the core network device, where the second information relates to the terminated mobile communication based on the core network and the third information is used to notify the core network device that the terminal device can receive the downlink information. Based on the second information, the access network device can learn about the status of the terminated mobile communication based on the core network on the core network side.Thus, when performing data transmission from the terminal device, the access network device can consider the status of the terminated mobile communication based on the core network on the core network side and send third-party information to notify the core network device that the terminal device can receive downlink information, so that when performing data transmission from the terminal device, the core network device can consider its ability to receive the input. Petition 870250091214, dated 06 / 10 / 2025, pp. 312 / 353 126 / 154 downlink formations by the terminal device and transmit the downlink information corresponding to the small data transmission.

[00616] FIG. 5h is a flowchart illustrating another method of data transmission according to an embodiment of the present disclosure. As shown in FIG. 5h, the data transmission method can be applied to an access network device and includes the following step(s):

[00617] In step S510h, the second piece of information sent by the core network device is received.

[00618] The second piece of information relates to terminated mobile communication based on the core network.

[00619] In some embodiments, the second information includes at least one of the following: second indication information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00620] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00621] In some modes, the second piece of information sent by the network element for access and mobility management is received. Petition 870250091214, dated 06 / 10 / 2025, pages 313 / 353 127 / 154

[00622] In some modes, the second piece of information sent by the session management function network element is received.

[00623] In some modes, the second information sent by the user plane function network element is received.

[00624] In some modes, a second message sent by the core network device is received, where the second message carries a second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00625] In some embodiments, the second message is a control plane message; and the access network device receives the control plane message sent by the core network device.

[00626] In some embodiments, the second message is a user plane message; and the access network device receives the user plane message sent by the core network device.

[00627] In step S520h, it is determined, based on the second piece of information, whether the third piece of information should be sent to the core network device.

[00628] The third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00629] For an optional implementation of step S520h, the optional implementation of step S520b in FIG. 5b and other associated parts Petition 870250091214, dated 06 / 10 / 2025, pp. 314 / 353 128 / 154 cited in the modalities of FIG. 5b can be consulted, and the details are not described here again.

[00630] In step S530h, the sending of the third piece of information to the core network device is determined, and the third piece of information is generated based on the second piece of information.

[00631] In some embodiments, the third piece of information includes at least one of the following: a third piece of information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00632] In step S540h, the third piece of information is sent to the core network device.

[00633] In the S550h stage, downlink information is received, corresponding to the transmission of small data, which is transmitted by the core network device based on third-party information.

[00634] Downlink information that is transmitted by the core network device based on third-party information and that corresponds to the small data transmission configured for the terminal device is received.

[00635] In the S560h stage, the downlink information transmitted by the core network device is sent to the terminal device via small data transmission.

[00636] Downlink information transmitted by the core network device and corresponding to small data transmission Petition 870250091214, dated 06 / 10 / 2025, pages 315 / 353 The 129 / 154 port configured for the terminal device is sent to the terminal device via small data transmission.

[00637] In some embodiments of this disclosure, the access network device receives the second information sent by the core network device and determines, based on the second information, whether to send the third information to the core network device, where the second information relates to mobile communication terminated on the core network, and the third information is used to notify the core network device that the terminal device can receive the downlink information.Based on the second piece of information, the access network device can learn about the status of the mobile communication terminated on the core network on the core network side, and when performing data transmission from the terminal device, the access network device can consider the status of the mobile communication terminated based on the core network on the core network side and send the third piece of information to notify the core network device that the terminal device can receive downlink information.Consequently, when performing data transmission from the terminal device, the core network device can consider the ability to receive downlink information from the terminal device and transmit the corresponding downlink information via small data transmission; and the access network device sends, to the terminal device, using small data transmission, the downlink information transmitted by the core network device, so as to perform small data transmission on the terminal device, thus ensuring that downlink information can arrive and reducing the terminal device's power consumption.

[00638] FIG. 6a is a flowchart that illustrates yet another method of data transmission according to an embodiment of the present Petition 870250091214, dated 06 / 10 / 2025, pp. 316 / 353 130 / 154 disclosure. As shown in FIG. 6a, the data transmission method can be used in the communications system shown in FIG. 1a, and the method includes the following step(s).

[00639] In step S610a, the access network device sends the first information to the core network device.

[00640] The initial information relates to the configuration status of the network access device for small data transmission from the terminal device.

[00641] In some embodiments, the first information includes at least one of the following: first indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00642] In some modalities, the first type of information indicates a type of information, configured for the terminal device, of information that can be transmitted in small-scale data transmission.

[00643] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, among others, signaling, data, or signaling and data. Petition 870250091214, dated 06 / 10 / 2025, pp. 317 / 353 131 / 154

[00644] In some embodiments, the first type of information indicates a direction of information transmission supported by small data transmission configured for the terminal device.

[00645] In some embodiments, the first type of information corresponding to the small data transmission configured for the terminal device includes, but is not limited to, uplink, downlink, or uplink and downlink.

[00646] In some modes, the limit information indicates a data size, configured for the terminal device, of information that can be transmitted via small data transmission.

[00647] In some modes, the limit information indicates a data volume, configured for the terminal device, of information that can be transmitted via small data transmission.

[00648] In some embodiments, the first protocol data unit session identifier indicates a protocol data unit session that supports small data transmission configured for the terminal device.

[00649] In some modes, the first quality of service flow identifier indicates a quality of service flow that supports small data transmission configured for the terminal device.

[00650] In some embodiments, the initial information includes MT-SDT and / or MO-SDT configuration information of the terminal device.

[00651] In some embodiments, the core network device includes a network element with access and mobility management function, a network element with management function of Petition 870250091214, dated 06 / 10 / 2025, pages 318 / 353 132 / 154 session, a network element with user plane function and similar.

[00652] In some modes, the access network device sends the initial information to a network element with access and mobility management functions.

[00653] In some modes, the access network device sends the initial information to a network element with session management function.

[00654] In some embodiments, the access network device sends the first information to a network element with user plane function.

[00655] In some embodiments, the access network device sends an initial message to the core network device, where the initial message carries the first information, and the first information is related to the configuration status of the small data transmission of the terminal device.

[00656] In some embodiments, the first message is a control plane message; and the access network device sends the control plane message to the core network device.

[00657] In some embodiments, the first message is a user plane message; and the access network device sends the user plane message to the core network device.

[00658] In some embodiments, the first message is an idle state transition report message; and the access network device sends the idle state transition report message from the terminal device to the core network device.

[00659] In some modes, the idle state transition report message is sent after the network device of Petition 870250091214, dated 06 / 10 / 2025, pp. 319 / 353 133 / 154 access to switch the terminal device to the inactive state.

[00660] In some embodiments, the core network device is configured with core network-based terminated mobile communication.

[00661] In some embodiments, if the terminal device supports small data transmissions, the terminal device may receive, in the idle state, downlink information corresponding to the small data transmission.On one side of the core network device, when downlink information arrives, for the terminal device in the idle state, especially for the terminal device whose configured extended discontinuous receive cycle is greater than or equal to 10.24 seconds and in the idle state, instead of sending the downlink information to the access network device to transmit the downlink information to the terminal device, the core network device evaluates the accessibility of the terminal device, performs a mobile-terminated communication based on the core network, and then sends the downlink information to the terminal device in the connected state, so that small data transmissions from the terminal device are not performed.

[00662] In step S620a, the core network device determines, based on the initial information, whether to transmit the buffered downlink information.

[00663] In some embodiments, downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00664] For an optional implementation of step S620a, reference may be made to an optional implementation of step S220b in FIG. 2b and other associated parts in the embodiments involved in Petition 870250091214, dated 06 / 10 / 2025, pp. 320 / 353 134 / 154 FIG. 2b, and the details are not described here again.

[00665] If the core network device determines to transmit the buffered downlink information based on the initial information, step S630a is performed.

[00666] In step S630a, the core network device transmits downlink information corresponding to small data transmission to the access network device based on the initial information.

[00667] In step S640a, the access network device sends, to the terminal device via small data transmission, the downlink information transmitted by the core network device.

[00668] It is specified in some embodiments of this disclosure that the access network device sends the first information to the core network device, where the first information relates to the configuration status of the access network device for small data transmission from the terminal device; the core network device determines, based on the first information, whether to transmit buffered downlink information; then, the core network device transmits, to the access network device, based on the first information, downlink information corresponding to the small data transmission; and the access network device sends, to the terminal device, using small data transmission, the downlink information transmitted by the core network device.Therefore, the core network device can learn about the configuration status of the small data transmission from the terminal device, thus avoiding a conflict between small data transmission and mobile communication terminated on the core network.

[00669] FIG. 6b is a flowchart that illustrates yet another method. Petition 870250091214, dated 06 / 10 / 2025, pp. 321 / 353 135 / 154 of data transmission according to an embodiment of the present disclosure. As shown in FIG. 6b, the data transmission method can be used in the communications system shown in FIG. 1a, and the method includes the following step(s).

[00670] In step S610b, the core network device sends the second piece of information to the access network device.

[00671] The second piece of information is / are related to terminated mobile communication based on the core network.

[00672] In some embodiments, the second information includes at least one of the following: second indication information indicating a buffer start; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00673] In some embodiments, the core network device includes an access and mobility management function network element, a session management function network element, a user plane function network element, and the like.

[00674] In some embodiments, the network element of the access and mobility management function sends the second information to the access network device.

[00675] In some embodiments, the network element of the session management function sends the second piece of information to the access network device.

[00676] In some modalities, the network element of the function Petition 870250091214, dated 06 / 10 / 2025, pages 322 / 353 136 / 154 of the user's piano sends the second piece of information to the access network device.

[00677] In some embodiments, the core network device sends a second message to the access network device, where the second message carries the second piece of information, and the second piece of information is related to the terminated mobile communication based on the core network.

[00678] In some embodiments, the second message is a control plane message; and the core network device sends the control plane message to the access network device.

[00679] In some embodiments, the second message is a user plane message; and the core network device sends the user plane message to the access network device.

[00680] In step S620b, the access network device determines, based on the second piece of information, whether to send the third piece of information to the core network device.

[00681] Third-party information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00682] For an optional implementation of step S620b, the optional implementation of step S520b in FIG. 5b and other associated parts in the embodiments of FIG. 5b can be consulted, and the details are not described here again.

[00683] If the access network device determines, based on the second piece of information, to send the third piece of information to the core network device, step S630b is performed.

[00684] In step S630b, the access network device sends the Petition 870250091214, dated 06 / 10 / 2025, pages 323 / 353 137 / 154 third piece of information to the core network device.

[00685] The third piece of information includes at least one of the following: third piece of information indicating to notify the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00686] In step S640b, the core network device determines, based on the third piece of information, whether to transmit the downlink information corresponding to the small data transmission.

[00687] If the core network device determines, based on third-party information, to transmit downlink information corresponding to small data transmission, step S650b is performed.

[00688] In the S650b stage, the core network device transmits, to the access network device, based on third-party information, the downlink information corresponding to the small data transmission.

[00689] In the S660b stage, the access network device sends, to the terminal device, via small data transmission, the downlink information transmitted by the core network device.

[00690] Some embodiments of this disclosure provide that the core network device sends a second piece of information to the access network device, where the second piece of information relates to mobile communication terminated on the core network; the device Petition 870250091214, dated 06 / 10 / 2025, pp. 324 / 353 138 / 154 The access network determines, based on the second piece of information, whether to send a third piece of information to the core network device, where the third piece of information is used to notify the core network device that the terminal device can receive downlink information. The access network device sends the third piece of information to the core network device; the core network device determines, based on the third piece of information, whether to transmit downlink information corresponding to the small data transmission; then, the core network device transmits the downlink information corresponding to the small data transmission to the access network device based on the third piece of information; and the access network device sends the downlink information transmitted by the core network device to the terminal device via the small data transmission.Therefore, the access network device can become aware of the status of the core network-based terminated mobile communication in order to determine whether to notify the core network about the receiving capability of the terminal device, and the core network device can become aware of the small data transmission configuration status of the terminal device and determine whether to transmit downlink information, thus avoiding a conflict between small data transmission and core network-based terminated mobile communication.

[00691] The following is yet another method of data transmission shown in an embodiment of this disclosure, and the method includes the following step(s).

[00692] 1. The base station sends the first information to the first network element using a first message. The first message can be any of a control plane message, a user plane message, or a message of Petition 870250091214, dated 06 / 10 / 2025, pages 325 / 353 139 / 154 inactive state transition report; the control plane message may be a next-generation application protocol message; the user plane message may be a user plane (GTP-U) message from the General Packet Radio Service (GPRS) tunneling protocol; and a packet header of the user plane message carries the first information.The initial information may include at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.The first network element is a network element for access and mobility management functions, a network element for session management functions, and a network element for user plane functions.

[00693] 2. The first network element determines, based on the initial information, whether to transmit the buffered downlink information. The first network element transmits the buffered downlink information in at least one of the following cases: the terminal device is configured for small data transmission; one type of downlink information belongs to one of the following signaling and data types: signaling and data corresponding to a first Petition 870250091214, dated 06 / 10 / 2025, pp. 326 / 353 140 / 154 type of information; an extended discontinuous receive cycle, represented by an extended discontinuous receive cycle parameter configured for the terminal device, is greater than or equal to a predefined cycle; a data size of the information belonging to the first type of information in the downlink information is less than or equal to a data limit represented by limit information; a second protocol data unit session identifier, corresponding to the information belonging to the first type of information in the downlink information, is consistent with the first protocol data unit session identifier; and a second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with the first quality of service flow identifier.

[00694] 3. The first network element determines the transmission of buffered downlink information, and the first network element transmits, to the base station, based on the first information, the downlink information corresponding to the small data transmission.

[00695] 4. The base station sends, to the terminal device, by means of small data transmission, the downlink information transmitted by the first network element.

[00696] The following is yet another method of data transmission shown in an embodiment of this disclosure, and the method includes the following step(s).

[00697] 1. The first network element sends the second piece of information to the base station using a second message. The second message can be a control plane message or a user plane message, where the control plane message can be a next application protocol message. Petition 870250091214, dated 06 / 10 / 2025, pp. 327 / 353 In the 141 / 154 generation, the user plane message can be a user plane (GTP-U) message of the General Packet Radio Service (GPRS) tunneling protocol, and a packet header of the user plane message carries the second information. The second information can include at least one of the following: second indication information indicating a buffer start; a second information type corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.The first network element is one of the following: an access and mobility management role network element, a session management role network element, and a user plane role network element.

[00698] 2. Based on the second piece of information, the base station determines whether to send the third piece of information to the first network element. The third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and the downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00699] 3. The base station determines the sending of the third piece of information, and the base station sends the third piece of information to the core network device. The third piece of information may include at least one of the following: third piece of information indicating the device to notify the core network device of Petition 870250091214, dated 06 / 10 / 2025, pp. 328 / 353 142 / 154 core network that the terminal device is capable of receiving downlink information from; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00700] 4. The first network element determines, based on the third piece of information, whether to transmit the downlink information corresponding to the small data transmission.

[00701] 5. The first network element determines the transmission of the buffered downlink information, and the first network element transmits, to the base station, based on the third piece of information, the downlink information corresponding to the small data transmission.

[00702] 6. The base station sends, to the terminal device, by means of small data transmission, the downlink information transmitted by the first network element.

[00703] It should be noted that multiple modalities or features separated by "or not" will affect other solutions, even if some of the features are not implementable. Furthermore, unless there is a contradiction, the modalities of this disclosure may be combined with the modalities or implementations involved in other data transmission methods and various optional solutions thereof, which will not be repeated here.

[00704] FIG. 7a is a block diagram of a 1000 data transmission device according to an embodiment of the present disclosure. As shown in FIG. 7a, the 1000 data transmission device can be used in a network device. Petition 870250091214, dated 06 / 10 / 2025, pp. 329 / 353 143 / 154 core, and the 1000 device may include: A first 1010 receiver module, configured to receive the first information sent by an access network device.

[00705] The initial information relates to the configuration status of the small data transmission of the terminal device.

[00706] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; a first protocol data unit (PDU) session identifier corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00707] In some embodiments, the first 1010 receiver module is configured to receive an initial message sent by an access network device, where the initial message carries the first information.

[00708] In some embodiments, the first 1010 receiver module is configured to receive a control plane message sent by an access network device.

[00709] In some modes, the first reception module 1010 is configured to receive a message from the user plan. Petition 870250091214, dated 06 / 10 / 2025, pages 330 / 353 144 / 154 sent by an access network device.

[00710] In some embodiments, the first 1010 receiver module is configured to receive an idle state transition report message from the terminal device sent by the access network device. In some embodiments, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00711] In some embodiments, the 1000 device also includes: a first determination module, configured to determine, based on the initial information, whether the buffered downlink information should be transmitted.

[00712] In some embodiments, downlink information includes signaling and / or buffered data to perform core network-based terminated mobile communication.

[00713] In some embodiments, the first determination module is configured to determine, based on the initial indication information, that the terminal device is configured with small data transmission and to transmit downlink information corresponding to the small data transmission.

[00714] In some embodiments, the first determination module is configured to transmit downlink information corresponding to small data transmission when the information in the downlink information belongs to a first information type.

[00715] In some embodiments, the first determination module is configured to transmit downlink information corresponding to small data transmission when an extended discontinuous receive cycle, represented by an extended discontinuous receive cycle parameter, is greater than or equal to a predefined cycle. Petition 870250091214, dated 06 / 10 / 2025, pp. 331 / 353 145 / 154

[00716] In some embodiments, the first determination module is configured to transmit downlink information corresponding to small data transmission when a data size of information belonging to the first type of information in the downlink information is less than or equal to a data limit represented by the limit information.

[00717] In some embodiments, the first determination module is configured to transmit downlink information corresponding to small data transmission when a second protocol data unit session identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with a first protocol data unit session identifier, and / or a second quality of service flow identifier corresponding to the information belonging to the first type of information in the downlink information is consistent with a first quality of service flow identifier.

[00718] In some embodiments, the 1000 device also includes: a first transmission module, configured to transmit downlink information corresponding to the transmission of small data to the access network device based on the first information.

[00719] FIG. 7b is a block diagram of another 1100 data transmission device, according to an embodiment of the present disclosure. As shown in FIG. 7b, the 1100 data transmission device can be used in a core network device, and the 1100 device may include: A first transmission module, 1110, is configured to send secondary information to an access network device.

[00720] The second piece of information relates to Petition 870250091214, dated 06 / 10 / 2025, pages 332 / 353 146 / 154 mobile termination based on the core network.

[00721] In some embodiments, the second information includes at least one of the following: second indication information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00722] In some modes, the first 1110 transmission module is configured to send a second message to the access network device, where the second message carries the second information.

[00723] In some embodiments, the first 1110 sending module is configured to send a message from the control plane to the access network device.

[00724] In some modes, the first 1110 sending module is configured to send a message from the user plan to the access network device.

[00725] In some versions, the 1100 device also includes: a third receiving module, configured to receive third-party information sent by the access network device.

[00726] In some embodiments, third-party information includes at least one of the following: third-party information indicating the core network device that the terminal device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the device Petition 870250091214, dated 06 / 10 / 2025, pages 333 / 353 147 / 154 the terminal is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

[00727] In some embodiments, the 1100 device also includes: A second determination module, configured to determine, based on the third piece of information, whether to transmit downlink information corresponding to small data transmission.

[00728] In some embodiments, the 1100 device also includes: a second transmission module, configured to transmit downlink information corresponding to small data transmission to the access network device based on third-party information.

[00729] FIG. 8a is a block diagram of another data transmission apparatus 2000, according to an embodiment of the present disclosure. As shown in FIG. 8a, the data transmission apparatus 2000 can be used in an access network device, and the apparatus 2000 may include: A second 2010 transmission module, configured to send the initial information to a core network device.

[00730] The initial information relates to the configuration status of the small data transmission of the terminal device.

[00731] In some embodiments, the initial information includes at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; an initial type of information corresponding to the configured small data transmission. Petition 870250091214, dated 06 / 10 / 2025, pages 334 / 353 148 / 154 for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; boundary information corresponding to the small data transmission configured for the terminal device; a first session identifier of the protocol data unit (PDU) corresponding to the small data transmission configured for the terminal device; and a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

[00732] In some embodiments, the second 2010 transmission module is configured to send a first message to the core network device, where the first message carries the first information.

[00733] ​​In some embodiments, the second 2010 sending module is configured to send a message from the control plane to the core network device.

[00734] In some modes, the second 2010 sending module is configured to send a message from the user plane to the core network device.

[00735] In some embodiments, the second 2010 sending module is configured to send an idle state transition report message from the terminal device to the core network device.

[00736] In some modes, the idle state transition report message is sent after the access network device switches the terminal device to the idle state.

[00737] In some modes, the 2000 apparatus also includes: a fourth receiving module, configured to receive downlink information corresponding to small data transmissions transmitted by the core network device based on the first Petition 870250091214, dated 06 / 10 / 2025, pages 335 / 353 149 / 154 ras information.

[00738] In some embodiments, the 2000 device also includes: a third transmitter module, configured to send the downlink information transmitted by the core network device to the terminal device by means of small data transmission.

[00739] FIG. 8b is a block diagram of yet another data transmission apparatus 2100, according to an embodiment of the present disclosure. As shown in FIG. 8b, the data transmission apparatus 2100 can be used in an access network device, and the apparatus 2100 may include: a second 2110 receiver module, configured to receive the second set of information sent by the core network device.

[00740] The second piece of information relates to terminated mobile communication based on the core network.

[00741] In some embodiments, the second information includes at least one of the following: second indication information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; and a third quality of service flow identifier corresponding to the buffered downlink information.

[00742] In some embodiments, the second 2110 receiver module is configured to receive a second message sent by the core network device, where the second message carries Petition 870250091214, dated 06 / 10 / 2025, pages 336 / 353 150 / 154 the second piece of information.

[00743] In some embodiments, the second 2110 receiver module is configured to receive a control plane message sent by the core network device.

[00744] In some embodiments, the second 2110 receiver module is configured to receive a user plane message sent by the core network device.

[00745] In some embodiments, the 2100 device also includes: a third determination module, configured to determine, based on the second information, whether the third information should be sent to the core network device.

[00746] Third-party information is used to notify the core network device that the terminal device is capable of receiving downlink information, and downlink information includes signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication.

[00747] In some versions, the 2100 device also includes: a first generator module, configured to generate the third information based on the second information.

[00748] In some embodiments, the third piece of information includes at least one of the following: a third piece of information indicating that the core network device is capable of receiving downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; and a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving. Petition 870250091214, dated 06 / 10 / 2025, pp. 337 / 353 151 / 154

[00749] A fourth transmission module is configured to send the third piece of information to the core network device.

[00750] In some embodiments, the 2100 device also includes: a fifth receiving module, configured to receive downlink information corresponding to small data transmissions transmitted by the core network device based on the third piece of information.

[00751] A fifth transmission module is configured to send the downlink information transmitted by the core network device to the terminal device via small data transmission.

[00752] It should be understood that the division of units in the above device is merely a logical division of functions and, in actual implementation, all or some of the units may be integrated into a single physical entity or may be physically separated. Furthermore, the units in the device may be implemented in a form of software invoked by a processor. For example, the device includes a processor, the processor is connected to a memory, the memory stores computer instructions, and the processor invokes the computer instructions stored in memory to implement any of the above methods or to implement functions of the units in the above device. The processor is, for example, a general-purpose processor such as a central processing unit (CPU) or a microprocessor, and the memory is either in-device memory or off-device memory.Alternatively, the units in the device can be implemented in the form of a hardware circuit, and some or all of the functions of the units can be implemented through the design of the hardware circuit, and the hardware circuit can be understood as one or more processors. For example, in one implementation, the hardware circuit is a circuit. Petition 870250091214, dated 06 / 10 / 2025, pages 338 / 353 152 / 154 application-specific integrated circuit (ASIC), and the functions of some or all of the units are implemented by designing a logical relationship between the circuit elements. For another implementation, the hardware circuit can be implemented using a programmable logic device (PLD). Using a field-programmable gate array (FPGA) as an example, the hardware circuit can include a large number of logic gate circuits, and a connection relationship between the logic gate circuits is configured using a configuration file, to implement functions of some or all of the units. All the units of the above device can be implemented in a software form invoked by a processor, or they can be implemented in a hardware circuit form, or they can be partially implemented in a software form invoked by a processor, while the remaining part is implemented in a hardware circuit form.

[00753] In some embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor may be a circuit with instruction reading and execution capabilities, for example, a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU, which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor may implement a specific function using a logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or reconfigurable. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), for example, an FPGA. In a reconfigurable hardware circuit, a process in which the processor loads a configuration document to implement the configuration of Petition 870250091214, dated 06 / 10 / 2025, pp. 339 / 353 153 / 154 A hardware circuit can be understood as a process in which the processor loads instructions to implement functions of some or all of the previous units. Additionally, it can also be a hardware circuit designed for artificial intelligence, which can be understood as an ASIC, such as a Neural Network Processing Unit (NPU), a Tensor Processing Unit (TPU), a Deep Learning Processing Unit (DPU), and similar devices.

[00754] This disclosure further provides a computer-readable storage medium containing computer program instructions stored thereon, the program instructions, when executed by a processor, implementing the steps of the data transmission method provided by this disclosure.

[00755] FIG. 9 is a block diagram illustrating a communication device according to an embodiment of the present disclosure. The communication device is the network device 1700; for example, the network device 1700 may be provided as another logical network entity in a core network or in an access network. Referring to FIG. 17, the network device 1700 includes a processing component 1722, which further includes one or more processors, and memory resources represented by a memory 1732 for storing instructions executable by the processing component 1722, such as application programs. The application program stored in memory 1732 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1722 is configured to execute instructions to perform the steps of the communication method provided by the embodiments of the method above.

[00756] The 1700 network device may also include a 1726 power component configured to perform management Petition 870250091214, dated 06 / 10 / 2025, pages 340 / 353 154 / 154 power supply of the device 1700, a wired or wireless network interface 1750 configured to connect the network device 1700 to a network and an input / output interface 1758. The network device 1700 can operate based on an operating system stored in memory 1732, such as Windows Server™, Mac OS X™, Unix™, Linux™, Free BSD™ or similar.

[00757] Other embodiments of the present disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the present disclosure. This application is intended to encompass any variations, uses, or adaptations of the present disclosure, following its general principles and including deviations from the present disclosure that fall within known or customary practice in the art. The specification and examples are intended to be regarded as exemplary only, with the true scope and spirit of the disclosure being indicated by the following claims.

[00758] It should be understood that the present disclosure is not limited to the precise structures described above and shown in the drawings, and various modifications and alterations may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims. Petition 870250091214, dated 06 / 10 / 2025, pages 341 / 353

Claims

1 / 8 CLAIMS 1. A method of data transmission, performed by a core network device, characterized in that it comprises: receiving the first information sent by an access network device, wherein the first information relates to the configuration status of small-scale data transmission from a terminal device; or sending the second information to the access network device, wherein the second information relates to the terminated mobile communication based on the core network.

2. A method according to claim 1, characterized in that it further comprises: determining, based on initial information, whether buffered downlink information should be transmitted, wherein the downlink information comprises signaling and / or buffered data for performing core network-based terminated mobile communication.

3. Method according to claim 2, characterized in that the initial information comprises at least one of the following: initial indication information indicating whether the terminal device is configured with small data transmission; a first type of information corresponding to the small data transmission configured for the terminal device; an extended discontinuous receive cycle parameter configured for the terminal device; limit information corresponding to the small data transmission configured for the terminal device; or a first protocol data unit session identifier corresponding to the small data transmission configured for the terminal device; or a first quality of service flow identifier corresponding to the small data transmission configured for the terminal device.

4. Method according to claim 3, characterized in that determining, based on the first information, whether the buffered downlink information should be transmitted comprises at least one of: in response to the determination, based on the first indication information, that the terminal device is configured with small data transmission, transmitting the downlink information corresponding to small data transmission; in the case where the information in the downlink information belongs to the first type of information, transmitting the downlink information corresponding to small data transmission; in the case where an extended discontinuous receive cycle represented by the extended discontinuous receive cycle parameter is greater than or equal to a predefined cycle, transmitting the downlink information corresponding to small data transmission;In the event that the data size of the first type of information in the downlink information is less than or equal to a data limit represented by the limit information, transmit the downlink information corresponding to the small data transmission; or in the event that a second session identifier of the protocol data unit corresponding to the first type of information in the downlink information is consistent with the first session identifier of the protocol data unit, or a second quality of service flow identifier corresponding to the first type of information in the downlink information is consistent with the first quality of service flow identifier, transmit the downlink information corresponding to the small data transmission.

5. A method according to any one of claims 1 to 4, characterized in that receiving the first information sent by the access network device comprises: receiving a first message sent by the access network device, wherein the first message carries the first information; optionally, wherein receiving the first message sent by the access network device comprises at least one of: receiving a control plane message sent by the access network device; receiving a user plane message sent by the access network device; or receiving an idle state transition report message from the terminal device sent by the access network device; optionally, the idle state transition report message is sent after the access network device switches the terminal device to an idle state.

6. Method, according to any one of claims 2 to 5, characterized in that it further comprises: in response to the determination of the transmission of buffered downlink information, transmitting, to the access network device, based on the initial information, the downlink information corresponding to the transmission of small data.

7. A method according to claim 1, characterized in that the second piece of information comprises at least one of the following: a second piece of information indicating the start of a buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information; a third protocol data unit session identifier corresponding to the buffered downlink information; or a third quality of service flow identifier corresponding to the buffered downlink information; optionally, wherein the sending of the second piece of information to the access network device comprises at least one of: sending a second message to the access network device, wherein the second message carries the second piece of information;Send a control plane message to the access network device, where the control plane message carries the second piece of information; or send a user plane message to the access network device, where the user plane message carries the second piece of information.

8. Method, according to claim 7, characterized Petition 870250091214, dated 06 / 10 / 2025, p.345 / 353 5 / 8 because it further comprises: receiving the third piece of information sent by the access network device; and determining, based on the third piece of information, whether to transmit the downlink information corresponding to the small data transmission; optionally, where the third piece of information comprises at least one of the following: a third piece of information indicating to notify the core network device that the terminal device is capable of receiving the downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; or a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

9. Method according to claim 8, characterized in that it further comprises: in response to the determination of the transmission of downlink information corresponding to small data transmission, transmitting, based on the third piece of information, the downlink information corresponding to small data transmission to the access network device.

10. Data transmission method, performed by an access network device, characterized in that it comprises: sending the first information to a core network device, wherein the first information relates to the configuration status of small-scale data transmission from a terminal device; or receiving the second information sent by the core network device, wherein the second information relates to terminated mobile communication based on the core network.

11. A method according to claim 10, characterized in that it further comprises: determining, based on the second piece of information, whether the third piece of information should be sent to the core network device, wherein the third piece of information is used to notify the core network device that the terminal device is capable of receiving downlink information, and the downlink information comprises signaling and / or data buffered by the core network device to perform core network-based terminated mobile communication; optionally, wherein the second piece of information comprises at least one of the following: a second indication piece of information indicating the start of the buffer; a second type of information corresponding to the buffered downlink information; timing information corresponding to the buffered downlink information; a data size corresponding to the buffered downlink information;a third session identifier of the protocol data unit corresponding to the buffered downlink information; or a third quality of service flow identifier Petition 870250091214, dated 06 / 10 / 2025, pp. 347 / 353 7 / 8 corresponding to the buffered downlink information.

12. A method according to claim 10 or 11, characterized in that receiving the second piece of information sent by the core network device comprises: receiving a second message sent by the core network device, wherein the second message carries the second piece of information, or receiving a message from the control plane sent by the core network device, wherein the control plane message carries the second piece of information.

13. A method according to claim 12, characterized in that it further comprises: determining the sending of the third piece of information to the core network device and generating the third piece of information based on the second piece of information; and sending the third piece of information to the core network device; optionally, wherein the third piece of information comprises at least one of the following: a third piece of information indicating to notify the core network device that the terminal device is capable of receiving the downlink information; a third type of information corresponding to the downlink information that the terminal device is capable of receiving; a fourth protocol data unit session identifier corresponding to the downlink information that the terminal device is capable of receiving; or a fourth quality of service flow identifier corresponding to the downlink information that the terminal device is capable of receiving.

14. Core network device, characterized by the fact that Petition 870250091214, dated 06 / 10 / 2025, pp. 348 / 353 8 / 8 comprising: a memory configured to store instructions; and a processor, wherein the processor, through the execution of instructions, is configured to implement the method, as defined in any of claims 1 to 9.

15. Network access device, characterized in that it comprises: a memory configured to store instructions; and a processor, wherein the processor, through the execution of instructions, is configured to implement the method, as defined in any one of claims 10 to 13. Petition 870250091214, dated 06 / 10 / 2025, pp. 349 / 353

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