Downlink signaling processing method and device, communication device and storage medium

Abstract

The invention relates to a downlink signaling processing method and device, a communication device and a storage medium. In at least one embodiment of the present disclosure, in a handover process of a radio access network (RAN) node, if an access and mobility management function (AMF) receives a downlink signaling sent by a network function (NF), indication information is sent to the NF, the indication information is used for indicating that the RAN node is performing handover, so that the NF knows that the downlink signaling has not been sent successfully; the method comprises the following steps of: switching an NF (Network Function) to an S-RAN node, reserving a downlink signaling sent by an NF (Network Function) by the AMF, receiving a switching-based result sent by the S-RAN node by the AMF after the switching process is ended, and directly sending the reserved downlink signaling to the S-RAN node or a T-RAN node by the AMF; when the downlink signaling is successfully sent, the AMF sends the notification message to the NF to inform the NF of the sending result of the downlink instruction, the NF does not need to send the same downlink signaling again, and the signaling overhead is reduced.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to the field of communication technology, and in particular to a method and device for processing downlink signaling, a communication device, and a storage medium. Background Art

[0002] At present, during the handover process of the Radio Access Network (RAN) node, if the network function (NF) triggers the sending of downlink signaling, the source RAN node in the handover process will send a rejection message to the access and mobility management function (AMF), which indicates that the RAN node is performing a handover, and then the AMF returns the indication that the RAN node is performing a handover to the NF, and the NF starts the protection timer. After the handover is completed or the handover fails or the handover is canceled or the protection timer times out, the NF will retry to send the downlink signaling.

[0003] It can be seen that during the RAN node switching process, the NF triggers the sending of downlink signaling. After the switching is completed or failed or canceled or the protection timer times out, the NF needs to retry to send the downlink signaling, that is, the same signaling is sent twice or more, resulting in signaling waste. Summary of the invention

[0004] At least one embodiment of the present disclosure provides a method, device, communication device and storage medium for processing downlink signaling.

[0005] In a first aspect, an embodiment of the present disclosure proposes a method for processing downlink signaling, which is applied to an access and mobility management function AMF, and the method includes:

[0006] During the handover process of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the AMF sends an indication message to the NF and retains the downlink signaling, where the indication message is used to indicate that the RAN node is performing the handover;

[0007] Based on the handover result, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node; the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed;

[0008] AMF sends a notification message to NF, which carries the sending result of the downlink instruction.

[0009] In some embodiments, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result, including:

[0010] The AMF sends a downlink signaling to the T-RAN node based on the handover result, indicating that the handover is completed;

[0011] The AMF sends downlink signaling to the S-RAN node based on the handover result being handover failure or handover cancellation.

[0012] In some embodiments, after receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF, including:

[0013] After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored;

[0014] If the indication information is not stored, the AMF sends downlink signaling to the S-RAN node;

[0015] The AMF receives a rejection message sent by the S-RAN node, where the rejection message carries indication information;

[0016] AMF stores indication information;

[0017] The AMF sends a downlink signaling sending failure message to the NF, and the downlink signaling sending failure message carries indication information.

[0018] In some embodiments, the method for processing downlink signaling further includes:

[0019] After AMF receives the downlink signaling sent by NF, if it is determined that the indication information is stored, AMF does not send downlink signaling to S-RAN, but directly sends the indication information to NF.

[0020] In some embodiments, after the AMF determines the switching result, the method for processing the downlink signaling further includes:

[0021] The AMF deletes the stored indication information.

[0022] In some embodiments, the method for processing downlink signaling further includes:

[0023] During the switching process of the radio access network RAN ​​node, if the AMF receives multiple downlink signalings, the AMF sends multiple downlink signalings to the S-RAN node or T-RAN node based on the switching result.

[0024] In some embodiments, multiple downlink signaling messages are sent to the S-RAN node or the T-RAN node in a unified manner, including:

[0025] The AMF sends multiple downlink signaling messages to the S-RAN node or T-RAN node through one message.

[0026] In a second aspect, the embodiment of the present disclosure further proposes a method for processing downlink signaling, which is applied to a network function NF, and the method includes:

[0027] NF sends downlink signaling to AMF;

[0028] The NF receives the indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover;

[0029] Based on the indication of the indication information, NF waits to receive the notification message sent by AMF, and the notification message carries the sending result of the downlink instruction.

[0030] In some embodiments, the method for processing downlink signaling further includes:

[0031] After receiving the indication information sent by AMF, NF starts the notification timer;

[0032] If the notification timer has not expired and the NF receives the notification message sent by the AMF, the NF stops the notification timer; or,

[0033] If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

[0034] In some embodiments, the method for processing downlink signaling further includes:

[0035] If NF receives the notification message sent by AMF and the sending result of the downlink instruction carried in the notification message is failure, NF resends the downlink signaling to AMF.

[0036] In a third aspect, an embodiment of the present disclosure further proposes a downlink signaling processing device, which is applied to an access and mobility management function AMF, and the device includes:

[0037] The first unit is configured to, during a handover process of a radio access network RAN ​​node, after receiving a downlink signaling sent by a network function NF, send indication information to the NF and retain the downlink signaling, wherein the indication information is used to indicate that the RAN node is performing a handover;

[0038] The second unit is configured to send downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result; wherein the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed;

[0039] The third unit is used to send a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

[0040] In a fourth aspect, the embodiment of the present disclosure further proposes a downlink signaling processing device, which is applied to a network function NF, and the device includes:

[0041] The first unit is used to send downlink signaling to the AMF;

[0042] A second unit is used to receive indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover;

[0043] The third unit is used to wait for receiving the notification message sent by the AMF based on the indication of the indication information, and the notification message carries the sending result of the downlink instruction.

[0044] In a fifth aspect, an embodiment of the present disclosure further provides a communication device, including a memory, a transceiver, and a processor:

[0045] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0046] During the handover of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the access and mobility management function AMF sends indication information to the NF and retains the downlink signaling, where the indication information is used to indicate that the RAN node is performing the handover;

[0047] Based on the handover result, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node; the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed;

[0048] AMF sends a notification message to NF, which carries the sending result of the downlink instruction.

[0049] In some embodiments, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result, including:

[0050] The AMF sends a downlink signaling to the T-RAN node based on the handover result, indicating that the handover is completed;

[0051] The AMF sends downlink signaling to the S-RAN node based on the handover result being handover failure or handover cancellation.

[0052] In some embodiments, after receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF, including:

[0053] After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored;

[0054] If the indication information is not stored, the AMF sends downlink signaling to the S-RAN node;

[0055] The AMF receives a rejection message sent by the S-RAN node, where the rejection message carries indication information;

[0056] AMF stores indication information;

[0057] The AMF sends a downlink signaling sending failure message to the NF, and the downlink signaling sending failure message carries indication information.

[0058] In some embodiments, after the AMF receives the downlink signaling sent by the NF, if it is determined that the indication information is stored, the AMF does not send the downlink signaling to the S-RAN, but directly sends the indication information to the NF.

[0059] In some embodiments, after the AMF determines the switching result, the AMF deletes the stored indication information.

[0060] In some embodiments, during the switching process of the radio access network RAN ​​node, if the AMF receives multiple downlink signalings, the AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node based on the switching result.

[0061] In some embodiments, multiple downlink signaling messages are sent to the S-RAN node or the T-RAN node in a unified manner, including:

[0062] The AMF sends multiple downlink signaling messages to the S-RAN node or T-RAN node through one message.

[0063] In a sixth aspect, an embodiment of the present disclosure further provides a communication device, including a memory, a transceiver, and a processor:

[0064] A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of a processor; and a processor for reading the computer program in the memory and performing the following operations:

[0065] The network function NF sends downlink signaling to the AMF;

[0066] The NF receives the indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover;

[0067] Based on the indication of the indication information, NF waits to receive the notification message sent by AMF, and the notification message carries the sending result of the downlink instruction.

[0068] In some embodiments, after receiving the indication information sent by the AMF, the NF starts the notification timer;

[0069] If the notification timer has not expired and the NF receives the notification message sent by the AMF, the NF stops the notification timer; or,

[0070] If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

[0071] In some embodiments, when the NF receives a notification message sent by the AMF, and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF resends the downlink signaling to the AMF.

[0072] In the seventh aspect, the embodiments of the present disclosure further propose a processor-readable storage medium, which stores a program, and the program is used to enable the processor to execute the downlink signaling processing method of any embodiment of the first aspect or execute the downlink signaling processing method of any embodiment of the second aspect.

[0073] In at least one embodiment of the present disclosure, during the RAN node switching process, if the AMF receives downlink signaling sent by the NF, an indication message is sent to the NF, where the indication message is used to indicate that the RAN node is performing the switching, so that the NF knows that the downlink signaling has not been sent successfully; and the AMF retains the downlink signaling sent by the NF. When the switching process is completed, the AMF directly sends the retained downlink signaling to the S-RAN node or the T-RAN node based on the switching result; when the downlink signaling is sent successfully, the AMF sends a notification message to the NF to inform the NF of the sending result of the downlink instruction, and the NF does not need to send the same downlink signaling again, thereby reducing signaling overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure, and a person skilled in the art can also obtain other drawings based on these drawings.

[0075] Figure 1 This is the interaction flow chart of the current downlink signaling;

[0076] Figure 2 A flowchart of a method for processing downlink signaling provided in an embodiment of the present disclosure;

[0077] Figure 3 A flowchart of another method for processing downlink signaling provided by an embodiment of the present disclosure;

[0078] Figure 4 An interactive flow chart of downlink signaling provided in an embodiment of the present disclosure;

[0079] Figure 5 A schematic diagram of a downlink signaling processing device provided in an embodiment of the present disclosure;

[0080] Figure 6 A schematic diagram of another downlink signaling processing device provided in an embodiment of the present disclosure;

[0081] Figure 7 A schematic diagram of a communication device provided in an embodiment of the present disclosure;

[0082] Figure 8 A schematic diagram of another communication device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0083] In order to more clearly understand the above-mentioned purposes, features and advantages of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. The specific embodiments described herein are only used to explain the present disclosure, rather than to limit the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in the field belong to the scope of protection of the present disclosure.

[0084] It should be noted that, in this document, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0085] Based on the TS23.502 protocol and the corresponding historical documents, the current downlink signaling interaction flow chart can be obtained as follows: Figure 1 As shown, in Figure 1 In the handover, the interacting entities involved include: the source radio access network node (S-RAN node) and the target radio access network node (T-RAN node) that are performing the handover, as well as the access and mobility management function (AMF) and the network function (NF), wherein the S-RAN node is the RAN node that serves the terminal before the handover. The T-RAN node is the RAN node that serves the terminal after the handover is completed. NF includes but is not limited to: SMF (Session Management function), PCF (Policy Control Function), LMF (Location Management Function), etc. Figure 1 As shown, the interaction process of downlink signaling includes but is not limited to the following steps 1 to 8:

[0086] Step 1: NF sends downlink signaling to AMF. The downlink signaling can be N1 interface signaling or N2 interface signaling.

[0087] Step 2: After receiving the downlink signaling, the AMF directly sends the downlink signaling to the S-RAN node.

[0088] Step 3: The S-RAN node sends a rejection message to the AMF, and the rejection message carries indication information, and the indication information is used to indicate that the RAN node is performing a handover. For example, the downlink signaling is N2 interface signaling, and the S-RAN rejects the N2 interface process (such as location reporting control, DL NAS message transmission, etc.), and the rejection message carries indication information, which is used to indicate that the RAN node is performing a handover.

[0089] Step 4: AMF sends a failure message to NF, which carries the aforementioned indication information.

[0090] Step 5: NF starts a timer, where the timer is a guard timer configured locally by NF.

[0091] When the wireless access network handover process is completed, step 6 is executed: AMF sends the handover result to NF, which can be handover completion, handover failure or handover cancellation. It should be noted that for different NFs, AMF may not need to send the handover result, which is not discussed or constrained here.

[0092] Step 7: After receiving the handover result or after the timer times out, the NF resends the downlink signaling to the AMF. The number of times the NF resends the downlink signaling does not exceed the pre-configured number of times.

[0093] Step 8: AMF sends downlink signaling to the S-RAN node or T-RAN node. If the handover result is handover failure or handover cancellation, AMF sends downlink signaling to the S-RAN node; if the handover result is handover completion, AMF sends downlink signaling to the T-RAN node.

[0094] It can be seen that in the current interaction process of downlink signaling, during the RAN node switching process, if the AMF sends downlink signaling to the S-RAN node, the S-RAN node rejects the downlink signaling and indicates that the RAN node is performing the switching by sending a rejection message carrying indication information to the AMF. The AMF sends a failure message carrying indication information to the NF, and the NF starts the timer. When the wireless access network switching process is completed, the AMF sends the switching result to the NF, and the NF sends the downlink signaling to the AMF again after receiving the switching result or after the timer expires. It can be seen that during the RAN node switching process, the NF triggers the sending of downlink signaling, and it is necessary for the NF to retry to send the downlink signaling after the switching is completed or the switching fails or the switching is canceled or the protection timer expires, that is, the same signaling is sent twice or more, resulting in signaling waste.

[0095] At least one embodiment of the present disclosure provides a method, device, communication device or storage medium for processing downlink signaling. During the switching process of a wireless access network RAN ​​node, if an access and mobility management function AMF receives downlink signaling sent by a network function NF, an indication message is sent to the NF, where the indication message is used to indicate that the RAN node is performing a switch, so that the NF knows that the downlink signaling has not been sent successfully; and the AMF retains the downlink signaling sent by the NF. When the switching process is completed, the AMF directly sends the retained downlink signaling to the S-RAN node or the T-RAN node based on the switching result; when the downlink signaling is sent successfully, the AMF sends a notification message to the NF to inform the NF of the sending result of the downlink instruction, and the NF does not need to send the same downlink signaling again, thereby reducing signaling overhead.

[0096] Figure 2 The present invention provides a flowchart of a method for processing downlink signaling provided in an embodiment of the present invention, wherein the method for processing downlink signaling is applied to an access and mobility management function AMF. Figure 2 As shown, the downlink signaling processing method may include but is not limited to steps 201 to 203:

[0097] In step 201, during the switching process of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF and retains the downlink signaling, where the indication information is used to indicate that the RAN node is performing switching.

[0098] In this embodiment, the AMF receives downlink signaling (including N1 interface signaling and / or N2 interface signaling) sent by the NF. If the switching process of the RAN node is being executed at this time, the AMF retains the downlink signaling and returns indication information to the NF to indicate that the RAN node is performing the switching.

[0099] In this embodiment, after receiving the indication information, the NF knows that the downlink signaling has not been sent successfully, so the NF enters the waiting stage, waiting for the sending result of the downlink signaling sent by the AMF, that is, waiting for the response of the successful sending of the downlink signaling.

[0100] In step 202, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result.

[0101] In this embodiment, when the switching process is completed, the AMF can receive the switching result sent by the S-RAN node, and the AMF directly sends the reserved downlink signaling to the S-RAN node or the T-RAN node, without the need for the NF to send the same downlink signaling again, thereby reducing signaling overhead.

[0102] In this embodiment, the AMF sends downlink signaling to the S-RAN node or the T-RAN node based on different handover results. For example, if the handover result is handover completion, the AMF indicates that the RAN node currently serving the terminal is the RAN node after the handover is completed (i.e., the T-RAN node), so the AMF sends downlink signaling to the T-RAN node. For another example, if the handover result is handover failure or handover cancellation, the AMF indicates that the RAN node currently serving the terminal is the RAN node serving the terminal before the handover (i.e., the S-RAN node), so the AMF sends downlink signaling to the S-RAN node.

[0103] In step 203, the AMF sends a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

[0104] In this embodiment, after the AMF successfully sends the downlink signaling to the S-RAN node or the T-RAN node, a notification message is sent to the NF, and the notification message carries the sending result of the downlink instruction, so that the NF knows the sending result of the downlink instruction.

[0105] In some embodiments, a new service operation is predefined, and the AMF sends a notification message to the NF based on the service operation.

[0106] It can be seen that in the embodiment of the present disclosure, during the RAN node switching process, if the AMF receives the downlink signaling sent by the NF, it sends an indication message to the NF, where the indication message is used to indicate that the RAN node is performing the switching, so that the NF knows that the downlink signaling has not been sent successfully; and the AMF retains the downlink signaling sent by the NF. When the switching process is completed, the AMF directly sends the retained downlink signaling to the S-RAN node or the T-RAN node based on the switching result; when the downlink signaling is sent successfully, the AMF sends a notification message to the NF to inform the NF of the sending result of the downlink instruction, and the NF does not need to send the same downlink signaling again, thereby reducing the signaling overhead.

[0107] In some embodiments, Figure 1 An implementation of "after receiving the downlink signaling sent by the network function NF, the AMF sends the indication information to the NF" in step 201 is as follows, including steps A1 to A5:

[0108] Step A1: After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored.

[0109] In this embodiment, the indication information is sent by the S-RAN node to the AMF. When the AMF first receives the indication information sent by the S-RAN node, the AMF stores the indication information until the handover is completed. During this period, the AMF receives downlink signaling and no longer sends it to the S-RAN, but directly returns the indication information to the NF. The handover completion includes handover completion, handover failure, or handover cancellation. In some embodiments, when the AMF determines the handover result, it indicates that the handover is completed, so the AMF deletes the stored indication information.

[0110] In some embodiments, during the RAN node switching process and during the period when the AMF stores indication information, if the AMF receives multiple downlink signaling, the AMF sends the multiple downlink signaling to the S-RAN node or T-RAN node in a unified manner based on the switching result. Among them, the unified sending method is, for example, that the AMF sends multiple downlink signaling to the S-RAN node or T-RAN node through one message. The unified sending method can also form multiple downlink signaling into a message queue and send them to the S-RAN node or T-RAN node in a signaling interaction process. It should be noted that the unified sending method can be designed according to actual needs, and this embodiment does not limit the specific unified sending method.

[0111] It can be seen that AMF sends multiple downlink signalings to the S-RAN node or T-RAN node through one signaling interaction. AMF does not need to send each downlink signaling separately, that is, AMF does not need to send multiple downlink signalings through multiple signaling interactions, which can reduce signaling interactions and transmission resources.

[0112] Step A2: If the indication information is not stored, the AMF sends downlink signaling to the S-RAN node.

[0113] In this embodiment, after the AMF receives the downlink signaling sent by the NF, if it is determined that the indication information is not stored, it is considered that the RAN node switching is not currently being performed (in fact, the RAN node switching may be being performed, but the AMF has never sent downlink signaling to the S-RAN node), so the AMF directly sends the downlink signaling to the S-RAN node.

[0114] Step A3: AMF receives a rejection message sent by the S-RAN node, where the rejection message carries indication information.

[0115] In this embodiment, if RAN node switching is being performed, after the S-RAN node receives the downlink signaling sent by the AMF, it sends a rejection message to the AMF, and the rejection message carries indication information.

[0116] Step A4: AMF stores the indication information.

[0117] In this embodiment, after receiving the rejection message sent by the S-RAN node, the AMF extracts the indication information in the rejection message and stores the indication information until the handover is completed.

[0118] Step A5: AMF sends a downlink signaling sending failure message to NF, and the downlink signaling sending failure message carries indication information.

[0119] In this embodiment, after receiving the rejection message sent by the S-RAN node, the AMF sends a downlink signaling sending failure message to the NF, and carries indication information in the downlink signaling sending failure message, and the indication information enables the NF to know that the downlink signaling has not been sent successfully.

[0120] In some embodiments, Figure 1 An implementation of "after receiving the downlink signaling sent by the network function NF, the AMF sends the indication information to the NF" in step 201 is as follows:

[0121] After AMF receives the downlink signaling sent by NF, if it is determined that the indication information is stored, AMF does not send downlink signaling to the S-RAN node, but directly sends the indication information to NF.

[0122] Compared with the prior art, in which the AMF sends downlink signaling to the S-RAN node as long as it receives the downlink signaling sent by the NF, in this embodiment, if the AMF determines that the indication information is stored, it does not send downlink signaling to the S-RAN node, which can reduce signaling interaction and transmission resources.

[0123] Figure 3 The present invention provides another method for processing downlink signaling according to an embodiment of the present invention, and the method for processing downlink signaling is applied to a network function NF. Figure 3 As shown, the downlink signaling processing method includes but is not limited to the following steps 301 to 303:

[0124] In step 301, the NF sends downlink signaling to the AMF.

[0125] The downlink signaling may be N1 interface signaling or N2 interface signaling. In this embodiment, the NF is other NFs except AMF, for example, the NF includes but is not limited to: SMF (Session Management Function), PCF (Policy Control Function), LMF (Location Management Function), etc.

[0126] In step 302, the NF receives indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover.

[0127] In this embodiment, after the NF receives the indication information sent by the AMF, it can be determined that the downlink signaling has not been sent successfully. In some embodiments, the NF sends a failure message by receiving the downlink signaling carrying the indication information, and then the NF extracts the indication information from the failure message.

[0128] In step 303, the NF waits to receive a notification message sent by the AMF based on the indication of the indication information, and the notification message carries the sending result of the downlink instruction.

[0129] In this embodiment, after receiving the indication information sent by AMF, NF knows that the downlink signaling has not been sent successfully, and NF enters the waiting stage, waiting for the result of the downlink signaling sent by AMF, that is, waiting for the response of the successful sending of the downlink signaling.

[0130] In this embodiment, after the AMF successfully sends the downlink signaling to the S-RAN node or the T-RAN node, a notification message is sent to the NF, and the notification message carries the sending result of the downlink instruction, so that the NF knows the sending result of the downlink instruction.

[0131] It can be seen that in the embodiment of the present disclosure, during the RAN node switching process, if the NF sends downlink signaling to the AMF, the NF receives the indication information sent by the AMF, and the indication information is used to indicate that the RAN node is performing the switching, so that the NF knows that the downlink signaling has not been sent successfully. The NF enters the waiting stage, waiting for the sending result of the downlink signaling sent by the AMF, that is, waiting for the response of the successful sending of the downlink signaling. There is no need for the NF to send the same downlink signaling again, which reduces the signaling overhead and simplifies the processing logic of the NF.

[0132] In some embodiments, Figure 3 After "NF receives the indication information sent by AMF" in step 302, the downlink signaling processing method further includes the following steps B1 to B3:

[0133] Step B1, NF starts the notification timer.

[0134] The notification timer is a guard timer configured locally by the NF and is used to detect the duration of waiting for a notification message, that is, to detect whether a notification message has been received.

[0135] Step B2: If the notification timer has not timed out and the NF receives the notification message sent by the AMF, the NF stops the notification timer.

[0136] In this embodiment, if the notification timer has not timed out and the NF receives the notification message sent by the AMF, it means that the NF has received the notification message within the specified time period, so the NF stops the notification timer.

[0137] Step B3: If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

[0138] In this embodiment, if the notification timer times out and the NF does not receive the notification message sent by the AMF, it means that the NF has not received the notification message within the specified time period. Therefore, the NF re-sends the downlink signaling to the AMF, which can improve the success rate of the downlink signaling transmission.

[0139] In some embodiments, the method for processing downlink signaling also includes: when the NF receives a notification message sent by the AMF, and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF re-sends the downlink signaling to the AMF.

[0140] In this embodiment, when the NF resends the downlink signaling to the AMF, if the RAN node switching process is not completed, the NF re-executes the downlink signaling to the AMF. Figure 2 and Figure 3 In the processes of each embodiment, if the RAN node switching process is completed, the AMF does not retain the downlink signaling, and directly sends the downlink signaling to the S-RAN node or the T-RAN node based on the switching result.

[0141] Based on the above embodiments, Figure 4 A downlink signaling interaction flow chart provided in an embodiment of the present disclosure, in Figure 4 In the handover, the interacting entities involved include: the source radio access network node (S-RAN node) and the target radio access network node (T-RAN node) that are performing the handover, as well as the access and mobility management function (AMF) and the network function (NF). Figure 4 As shown, the interaction process of downlink signaling includes but is not limited to the following steps 1 to 8:

[0142] Step 1: NF sends downlink signaling to AMF.

[0143] The downlink signaling may be N1 interface signaling or N2 interface signaling.

[0144] Step 2: AMF retains downlink signaling.

[0145] In this embodiment, during the RAN node switching process, if the AMF receives downlink signaling, the AMF retains the downlink signaling.

[0146] Step 3: AMF sends an indication message to NF.

[0147] In this embodiment, the AMF sends a downlink signaling failure message to the NF, and the downlink signaling failure message carries indication information. After receiving the indication information sent by the AMF, the NF knows that the downlink signaling has not been sent successfully, and the NF enters the waiting stage, waiting for the sending result of the downlink signaling sent by the AMF, that is, waiting for the response of the successful sending of the downlink signaling.

[0148] Step 4: NF starts the notification timer.

[0149] In this embodiment, step 4 is an optional step. After receiving the indication information, the NF starts the notification timer. The notification timer is a guard timer configured locally in the NF and is used to detect the duration of waiting for the notification message, that is, to detect whether the notification message is received.

[0150] In this embodiment, if the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

[0151] Step 5: The S-RAN node sends the switching result to the AMF.

[0152] In this embodiment, after the radio access network switching process is completed, the S-RAN node sends the switching result to the AMF.

[0153] Step 6: AMF sends downlink signaling to the S-RAN node or T-RAN node.

[0154] In this embodiment, after receiving the switching result sent by the S-RAN node, the AMF sends downlink signaling to the T-RAN node based on the switching result being switching completed; and sends downlink signaling to the S-RAN node based on the switching result being switching failure or switching cancellation.

[0155] Step 7: AMF sends a notification message to NF.

[0156] In this embodiment, the notification message carries the sending result of the downlink instruction.

[0157] Step 8: NF stops the notification timer.

[0158] In this embodiment, if the notification timer has not timed out and the NF receives the notification message sent by the AMF, the NF stops the notification timer.

[0159] In some embodiments, if the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF ( Figure 4 not shown).

[0160] In some embodiments, when the NF receives a notification message sent by the AMF, and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF resends the downlink signaling to the AMF.

[0161] When NF sends downlink signaling to AMF again, if the RAN node switching process is not completed, it will be re-executed Figure 2 and Figure 3 In the processes of each embodiment, if the RAN node switching process is completed, the AMF does not retain the downlink signaling, and directly sends the downlink signaling to the S-RAN node or the T-RAN node based on the switching result.

[0162] visible, Figure 4 The interaction process of downlink signaling shown in Figure 1 The interaction process of downlink signaling shown in the figure reduces Figure 1 Steps 2 and 3 in , thus reducing signaling interaction and transmission resources. Figure 1 In step 7, that is, the NF does not need to send the same downlink signaling again, thereby reducing signaling overhead.

[0163] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity of description, they are all described as a series of action combinations, but those skilled in the art will understand that the embodiments of the present disclosure are not limited by the described action sequence, because according to the embodiments of the present disclosure, some steps can be performed in other sequences or simultaneously. In addition, those skilled in the art will understand that the embodiments described in the specification are all optional embodiments.

[0164] Figure 5 A schematic diagram of a downlink signaling processing device provided in an embodiment of the present disclosure is applied to an access and mobility management function AMF, such as Figure 5 As shown, the device includes but is not limited to: a first unit 51, a second unit 52 and a third unit 53, which are specifically described as follows:

[0165] The first unit 51 is configured to, in a radio access network RAN ​​node handover process, after receiving a downlink signaling sent by a network function NF, send indication information to the NF and retain the downlink signaling, wherein the indication information is used to indicate that the RAN node is performing a handover;

[0166] The second unit 52 is configured to send downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result; wherein the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed;

[0167] The third unit 53 is used to send a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

[0168] In some embodiments, the second unit 52 sends downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result, including:

[0169] Based on the handover result being handover completed, sending downlink signaling to the T-RAN node;

[0170] Based on the handover result being handover failure or handover cancellation, a downlink signaling is sent to the S-RAN node.

[0171] In some embodiments, after receiving the downlink signaling sent by the network function NF, the first unit 51 sends indication information to the NF, including:

[0172] After receiving the downlink signaling sent by the NF, determine whether the indication information is stored;

[0173] If the indication information is not stored, sending downlink signaling to the S-RAN node;

[0174] receiving a rejection message sent by the S-RAN node, where the rejection message carries indication information;

[0175] storing instruction information;

[0176] A downlink signaling sending failure message is sent to the NF, where the downlink signaling sending failure message carries indication information.

[0177] In some embodiments, the first unit 51 is further configured to:

[0178] After receiving the downlink signaling sent by the NF, if it is determined that the indication information is stored, the downlink signaling is not sent to the S-RAN, and the indication information is sent directly to the NF.

[0179] In some embodiments, the second unit 52 is further configured to:

[0180] After the switching result is determined, the stored instruction information is deleted.

[0181] In some embodiments, the second unit 52 is further used for:

[0182] During the handover process of the radio access network RAN ​​node, if multiple downlink signalings are received, the multiple downlink signalings are uniformly sent to the S-RAN node or the T-RAN node based on the handover result.

[0183] In some embodiments, the second unit 52 uniformly sends multiple downlink signalings to the S-RAN node or the T-RAN node, including:

[0184] Multiple downlink signaling messages are sent to the S-RAN node or the T-RAN node through one message.

[0185] Figure 5 For details of the various embodiments of the downlink signaling processing device shown, please refer to Figure 2 To avoid repetition, the various embodiments of the method for processing downlink signaling are not described again.

[0186] Figure 6 A schematic diagram of another downlink signaling processing device provided in an embodiment of the present disclosure is applied to a network function NF, such as Figure 6 As shown, the device includes but is not limited to: a first unit 61, a second unit 62 and a third unit 63, which are specifically described as follows:

[0187] The first unit 61 is used to send downlink signaling to the AMF;

[0188] The second unit 62 is used to receive indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover;

[0189] The third unit 63 is used to wait for receiving a notification message sent by the AMF based on the indication of the indication information, where the notification message carries the sending result of the downlink instruction.

[0190] In some embodiments, the second unit 62 is further used to: start the notification timer after receiving the indication information sent by the AMF. The first unit 61 is also used to: if the notification timer has not timed out and a notification message sent by the AMF is received, stop the notification timer; or, if the notification timer has timed out and the notification message sent by the AMF is not received, resend the downlink signaling to the AMF.

[0191] In some embodiments, the first unit 61 is further used for: receiving a notification message sent by the AMF, and the sending result of the downlink instruction carried in the notification message is a sending failure, then re-sending the downlink signaling to the AMF.

[0192] Figure 6 For details of the various embodiments of the downlink signaling processing device shown, please refer to Figure 3 To avoid repetition, the various embodiments of the method for processing downlink signaling are not described again.

[0193] The embodiment of the present disclosure also provides a processor-readable storage medium, the processor-readable storage medium stores a program, and the program is used to enable the processor to execute the steps of each embodiment of the processing method of downlink signaling. The processor-readable storage medium can be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (such as floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0194] Figure 7 A schematic diagram of a communication device provided in an embodiment of the present disclosure, such as Figure 7 As shown, the communication device provided in the embodiment of the present disclosure includes a memory 71, a transceiver 72, and a processor 73:

[0195] The memory 71 is used to store computer programs; the transceiver 72 is used to send and receive data under the control of the processor 73; the processor 73 is used to read the computer program in the memory 71 and execute:

[0196] During the handover of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the access and mobility management function AMF sends indication information to the NF and retains the downlink signaling, where the indication information is used to indicate that the RAN node is performing the handover;

[0197] Based on the handover result, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node; the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed;

[0198] AMF sends a notification message to NF, which carries the sending result of the downlink instruction.

[0199] In some embodiments, the AMF sends downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result, including:

[0200] The AMF sends a downlink signaling to the T-RAN node based on the handover result, indicating that the handover is completed;

[0201] The AMF sends downlink signaling to the S-RAN node based on the handover result being handover failure or handover cancellation.

[0202] In some embodiments, after receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF, including:

[0203] After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored;

[0204] If the indication information is not stored, the AMF sends downlink signaling to the S-RAN node;

[0205] The AMF receives a rejection message sent by the S-RAN node, where the rejection message carries indication information;

[0206] AMF stores indication information;

[0207] The AMF sends a downlink signaling sending failure message to the NF, and the downlink signaling sending failure message carries indication information.

[0208] In some embodiments, after the AMF receives the downlink signaling sent by the NF, if it is determined that the indication information is stored, the AMF does not send the downlink signaling to the S-RAN, but directly sends the indication information to the NF.

[0209] In some embodiments, after the AMF determines the switching result, the AMF deletes the stored indication information.

[0210] In some embodiments, during the switching process of the radio access network RAN ​​node, if the AMF receives multiple downlink signalings, the AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node based on the switching result.

[0211] In some embodiments, multiple downlink signaling messages are sent to the S-RAN node or the T-RAN node in a unified manner, including:

[0212] The AMF sends multiple downlink signaling messages to the S-RAN node or T-RAN node through one message.

[0213] Figure 7 In the embodiment, the transceiver 72 is used to receive and send data under the control of the processor 73. The bus architecture may include any number of interconnected buses and bridges, specifically various circuits of one or more processors represented by the processor 73 and the memory represented by the memory 71 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 72 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 73 is responsible for managing the bus architecture and general processing, and the memory 71 may store data used by the processor 73 when performing operations.

[0214] Figure 7In the embodiment, the processor 73 can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 73 or the instructions in the form of software. The processor 73 can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0215] Figure 8 A schematic diagram of another communication device provided in an embodiment of the present disclosure, such as Figure 8 As shown, the communication device provided in the embodiment of the present disclosure includes a memory 81, a transceiver 82, and a processor 83:

[0216] The memory 81 is used to store computer programs; the transceiver 82 is used to send and receive data under the control of the processor 83; the processor 83 is used to read the computer program in the memory 81 and execute:

[0217] The network function NF sends downlink signaling to the AMF;

[0218] The NF receives the indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover;

[0219] Based on the indication of the indication information, NF waits to receive the notification message sent by AMF, and the notification message carries the sending result of the downlink instruction.

[0220] In some embodiments, after receiving the indication information sent by the AMF, the NF starts the notification timer;

[0221] If the notification timer has not expired and the NF receives the notification message sent by the AMF, the NF stops the notification timer; or,

[0222] If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

[0223] In some embodiments, when the NF receives a notification message sent by the AMF, and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF resends the downlink signaling to the AMF.

[0224] Figure 8In the embodiment, the transceiver 82 is used to receive and send data under the control of the processor 83. The bus architecture may include any number of interconnected buses and bridges, specifically one or more processors represented by the processor 83 and various circuits of the memory represented by the memory 81 are linked together. The bus architecture may also link together various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface. The transceiver 82 may be a plurality of components, namely, a transmitter and a receiver, providing a unit for communicating with various other devices on a transmission medium, which transmission medium includes a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 83 is responsible for managing the bus architecture and general processing, and the memory 81 may store data used by the processor 83 when performing operations.

[0225] Figure 8 In the embodiment, the processor 83 can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit in the processor 83 or the instructions in the form of software. The processor 83 can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The general processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0226] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0227] Those skilled in the art will appreciate that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features from different embodiments is meant to be within the scope of the present disclosure and to form different embodiments.

[0228] Those skilled in the art will appreciate that the description of each embodiment has its own emphasis, and for parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0229] Although the embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for processing downlink signaling, applied to an access and mobility management function AMF, the method comprising: During the handover process of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF and retains the downlink signaling, where the indication information is used to indicate that the RAN node is performing the handover; The AMF sends the downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result; wherein the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed; The AMF sends a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

2. The method according to claim 1, wherein: The AMF sending the downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result includes: The AMF sends the downlink signaling to the T-RAN node based on the handover result that the handover is completed; The AMF sends the downlink signaling to the S-RAN node based on the handover result being handover failure or handover cancellation.

3. The method according to claim 1, wherein: After receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF, including: After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored; If the indication information is not stored, the AMF sends the downlink signaling to the S-RAN node; The AMF receives a rejection message sent by the S-RAN node, where the rejection message carries the indication information; The AMF stores the indication information; The AMF sends a downlink signaling sending failure message to the NF, and the downlink signaling sending failure message carries the indication information.

4. The method according to claim 3, wherein: The method further comprises: After the AMF receives the downlink signaling sent by the NF, if it is determined that the indication information is stored, the AMF does not send the downlink signaling to the S-RAN, but directly sends the indication information to the NF.

5. The method according to claim 3 or 4, wherein: After the AMF determines the switching result, the method further includes: The AMF deletes the stored indication information.

6. The method according to claim 1, wherein: The method further comprises: During the switching process of the radio access network RAN ​​node, if the AMF receives multiple downlink signalings, the AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node based on the switching result.

7. The method according to claim 6, wherein: The sending the multiple downlink signalings to the S-RAN node or the T-RAN node uniformly includes: The AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node through one message.

8. A method for processing downlink signaling, applied to a network function NF, the method comprising: The NF sends downlink signaling to the AMF; The NF receives the indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover; Based on the indication of the indication information, the NF waits to receive the notification message sent by the AMF, and the notification message carries the sending result of the downlink instruction.

9. The method according to claim 8, wherein: The method further comprises: After receiving the indication information sent by the AMF, the NF starts the notification timer; If the notification timer has not timed out and the NF receives the notification message sent by the AMF, the NF stops the notification timer; or, If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

10. The method according to claim 8 or 9, wherein: The method further comprises: If the NF receives the notification message sent by the AMF and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF resends the downlink signaling to the AMF.

11. A downlink signaling processing device, applied to an access and mobility management function AMF, the device comprising: A first unit is configured to, after receiving downlink signaling sent by a network function NF during a handover process of a radio access network RAN ​​node, send indication information to the NF and retain the downlink signaling, wherein the indication information is used to indicate that the RAN node is performing a handover; The second unit is configured to send the downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result; wherein the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed; The third unit is used to send a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

12. A downlink signaling processing device, applied to a network function NF, the device comprising: The first unit is used to send downlink signaling to the AMF; A second unit is configured to receive indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover; The third unit is used to wait for receiving a notification message sent by the AMF based on the indication of the indication information, and the notification message carries the sending result of the downlink instruction.

13. A communication device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: During the handover process of the radio access network RAN ​​node, after receiving the downlink signaling sent by the network function NF, the access and mobility management function AMF sends indication information to the NF and retains the downlink signaling, where the indication information is used to indicate that the RAN node is performing the handover; The AMF sends the downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result; wherein the S-RAN node is the RAN node serving the terminal before the handover, and the T-RAN node is the RAN node serving the terminal after the handover is completed; The AMF sends a notification message to the NF, where the notification message carries the sending result of the downlink instruction.

14. The communication device according to claim 13, wherein: The AMF sending the downlink signaling to the S-RAN node or the target radio access network T-RAN node based on the handover result includes: The AMF sends the downlink signaling to the T-RAN node based on the handover result that the handover is completed; The AMF sends the downlink signaling to the S-RAN node based on the handover result being handover failure or handover cancellation.

15. The communication device according to claim 13, wherein: After receiving the downlink signaling sent by the network function NF, the AMF sends indication information to the NF, including: After receiving the downlink signaling sent by the NF, the AMF determines whether the indication information is stored; If the indication information is not stored, the AMF sends the downlink signaling to the S-RAN node; The AMF receives a rejection message sent by the S-RAN node, where the rejection message carries the indication information; The AMF stores the indication information; The AMF sends a downlink signaling sending failure message to the NF, and the downlink signaling sending failure message carries the indication information.

16. The communication device according to claim 15, wherein: After the AMF receives the downlink signaling sent by the NF, if it is determined that the indication information is stored, the AMF does not send the downlink signaling to the S-RAN, but directly sends the indication information to the NF.

17. The communication device according to claim 15 or 16, wherein: After the AMF determines the switching result, the AMF deletes the stored indication information.

18. The communication device according to claim 13, wherein: During the switching process of the radio access network RAN ​​node, if the AMF receives multiple downlink signalings, the AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node based on the switching result.

19. The communication device according to claim 18, wherein: The sending the multiple downlink signalings to the S-RAN node or the T-RAN node uniformly includes: The AMF sends the multiple downlink signalings to the S-RAN node or the T-RAN node through one message.

20. A communication device, characterized in that: Including memory, transceiver, processor: A memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; and a processor for reading the computer program in the memory and performing the following operations: The network function NF sends downlink signaling to the AMF; The NF receives the indication information sent by the AMF, where the indication information is used to indicate that the RAN node is performing a handover; Based on the indication of the indication information, the NF waits to receive the notification message sent by the AMF, and the notification message carries the sending result of the downlink instruction.

21. The communication device according to claim 20, wherein: After receiving the indication information sent by the AMF, the NF starts the notification timer; If the notification timer has not timed out and the NF receives the notification message sent by the AMF, the NF stops the notification timer; or, If the notification timer times out and the NF does not receive the notification message sent by the AMF, the NF resends the downlink signaling to the AMF.

22. The communication device according to claim 20 or 21, wherein: If the NF receives the notification message sent by the AMF and the sending result of the downlink instruction carried in the notification message is a sending failure, the NF resends the downlink signaling to the AMF.

23. A processor-readable storage medium, characterized in that: The processor-readable storage medium stores a program, and the program is used to enable the processor to execute the downlink signaling processing method according to any one of claims 1 to 7 or the downlink signaling processing method according to claims 8 to 10.

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