Downlink signaling processing method and device, network side equipment and medium

Abstract

The embodiment of the invention relates to a downlink signaling processing method and device, network side equipment and a medium, if a source radio access network RAN node receives a downlink signaling from a network function NF node in the process of executing a switching process for a target RAN node, a first message is returned to the NF node, and the downlink signaling is reserved, the downlink signaling is sent to the target RAN node; wherein the first message is used for indicating that the source RAN node is currently executing a switching process; the target RAN node is used for processing the downlink signaling and sending a notification message to the NF node, and the notification message comprises a processing result of the downlink signaling. According to the embodiment of the invention, the receiving and transmitting period of the downlink signaling can be effectively shortened, and the processing timeliness of the downlink signaling can be effectively guaranteed.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a downlink signaling processing method, device, network side equipment and medium. Background Art

[0002] When the RAN (Radio Access Network) node switches, the core network side is not aware of it. At this time, the CN (Core Network) NF (Network Function) node may still transmit messages to the source RAN node. In the existing method of processing downlink signaling during switching in RAN non-service scenarios, it is necessary to determine the switching result (such as RAN switching success or failure), and then the NF (such as AMF, Access and Mobility Management Function) node will try to resend the downlink signaling based on the switching result. At present, there is no method for processing downlink signaling during switching in RAN service scenarios. If the existing method for processing downlink signaling during switching in RAN non-service scenarios continues to refer to, the sending and receiving cycle of downlink signaling during switching is extended, which will further make it difficult to process downlink signaling in a timely manner. Summary of the invention

[0003] In order to solve the above technical problems, the present disclosure provides a downlink signaling processing method, apparatus, network side equipment and medium.

[0004] The embodiment of the present disclosure provides a downlink signaling processing method, which is applied to a source radio access network RAN ​​node, comprising: if downlink signaling is received from a network function NF node during a handover process for a target RAN node, returning a first message to the NF node and retaining the downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing the handover process; sending the downlink signaling to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

[0005] Optionally, the sending the downlink signaling to the target RAN node includes: sending the downlink signaling to the target RAN node upon receiving a resource release message sent by the target RAN node.

[0006] Optionally, the resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0007] Optionally, sending the downlink signaling to the target RAN node includes: sending the downlink signaling to the target RAN node upon receiving an end identifier sent by the NF node; wherein the end identifier is used to indicate that the downlink data has been sent.

[0008] Optionally, sending the downlink signaling to the target RAN node includes: when there are multiple downlink signalings, combining the multiple downlink signalings and sending them to the target RAN node.

[0009] Optionally, the first message also carries information of the target RAN node.

[0010] Optionally, the method further includes: if the switching process fails to be executed or if the switching process is canceled, processing the downlink signaling.

[0011] The embodiment of the present disclosure provides a downlink signaling processing method, which is applied to an NF node, including: sending downlink signaling to a source RAN node; if a first message returned by the source RAN node for the downlink signaling is received, waiting to receive a notification message for the downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a handover process, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the handover process, the target RAN node is used to process the downlink signaling, and send the notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

[0012] Optionally, the first message also carries information of the target RAN node.

[0013] Optionally, the method further includes: sending the downlink signaling to the target RAN node.

[0014] Optionally, the method also includes: starting a timer when the first message is received; if the notification message is not received within a preset time length corresponding to the timer, determining a current RAN node of the service terminal; wherein the current RAN node is the source RAN node or the target RAN node; and sending the downlink signaling to the current RAN node.

[0015] Optionally, the method further includes: if the notification message is received within a preset time period corresponding to the timer, stopping the timer.

[0016] Optionally, there are multiple downlink signalings, and starting the timer when the first message is received includes: for each first message corresponding to the downlink signaling, starting the timer corresponding to the first message when the first message is received.

[0017] Optionally, the method further includes: for each of the timers, if a notification message corresponding to the timer is received within a preset time length corresponding to the timer, stopping the timer.

[0018] Optionally, there are multiple downlink signaling messages, and starting the timer when the first message is received includes: starting the timer when a first message corresponding to the first downlink signaling message is received.

[0019] Optionally, the method further includes: if a notification message corresponding to each downlink signaling is received within a preset time length corresponding to the timer, stopping the timer.

[0020] Optionally, the sending the downlink signaling to the current RAN node includes: sending a target downlink signaling among multiple downlink signalings to the current RAN node; wherein, the NF node does not receive a notification message corresponding to the target downlink signaling within a preset time length corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

[0021] Optionally, there are multiple downlink signalings, and the multiple downlink signalings share one notification message.

[0022] An embodiment of the present disclosure provides a downlink signaling processing method, which is applied to a target RAN node, comprising: upon receiving downlink signaling sent by a source RAN node corresponding to a handover process currently being executed, processing the downlink signaling; sending a notification message to an NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes a processing result of the downlink signaling.

[0023] Optionally, the resource release message sent to the source RAN node during the handover process carries a signaling transmission identifier, where the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0024] Optionally, sending a notification message to the NF node corresponding to the downlink signaling includes: when the number of received downlink signaling is multiple, sending a notification message to the NF node corresponding to the downlink signaling, the one notification message including the processing results of the multiple downlink signalings.

[0025] Optionally, the method further includes: receiving downlink signaling sent by the NF node.

[0026] An embodiment of the present disclosure provides a network side device, which serves as a source RAN node and includes a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: if downlink signaling is received from a network function NF node during the process of executing a switching process for a target RAN node, a first message is returned to the NF node and the downlink signaling is retained; wherein the first message is used to indicate that the source RAN node is currently executing a switching process; the downlink signaling is sent to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

[0027] Optionally, the sending the downlink signaling to the target RAN node includes: sending the downlink signaling to the target RAN node upon receiving a resource release message sent by the target RAN node.

[0028] Optionally, the resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0029] Optionally, sending the downlink signaling to the target RAN node includes: sending the downlink signaling to the target RAN node upon receiving an end identifier sent by the NF node; wherein the end identifier is used to indicate that the downlink data has been sent.

[0030] Optionally, sending the downlink signaling to the target RAN node includes: when there are multiple downlink signalings, combining the multiple downlink signalings and sending them to the target RAN node.

[0031] Optionally, the first message also carries information of the target RAN node.

[0032] Optionally, the processor is further used to perform the following operations: if the switching process fails to be executed or if the switching process is canceled, processing the downlink signaling.

[0033] An embodiment of the present disclosure provides a network side device, which serves as a target RAN node and includes a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: upon receiving downlink signaling sent by a source RAN node corresponding to a switching process currently being executed, processing the downlink signaling; sending a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes the processing result of the downlink signaling.

[0034] Optionally, the resource release message sent to the source RAN node during the handover process carries a signaling transmission identifier, where the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0035] Optionally, sending a notification message to the NF node corresponding to the downlink signaling includes: when the number of received downlink signaling is multiple, sending a notification message to the NF node corresponding to the downlink signaling, the one notification message including the processing results of the multiple downlink signalings.

[0036] Optionally, the processor is further used to perform the following operations: receiving downlink signaling sent by the NF node.

[0037] An embodiment of the present disclosure provides a network side device, which serves as a NF node and includes a memory, a transceiver, and a processor: the memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: sending downlink signaling to a source RAN node; if a first message returned by the source RAN node for the downlink signaling is received, waiting to receive a notification message for the downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a switching process, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the switching process, the target RAN node is used to process the downlink signaling, and send the notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

[0038] Optionally, the first message also carries information of the target RAN node.

[0039] Optionally, the processor is further configured to perform the following operations: sending the downlink signaling to the target RAN node.

[0040] Optionally, the processor is further used to perform the following operations: starting a timer when the first message is received; if the notification message is not received within a preset time length corresponding to the timer, determining a current RAN node serving the terminal; wherein the current RAN node is the source RAN node or the target RAN node; and sending the downlink signaling to the current RAN node.

[0041] Optionally, the processor is further used to perform the following operations: if the notification message is received within a preset time period corresponding to the timer, stop the timer.

[0042] Optionally, there are multiple downlink signalings, and starting the timer when the first message is received includes: for each first message corresponding to the downlink signaling, starting the timer corresponding to the first message when the first message is received.

[0043] Optionally, the processor is further used to perform the following operations: for each of the timers, if a notification message corresponding to the timer is received within a preset time length corresponding to the timer, stop the timer.

[0044] Optionally, there are multiple downlink signaling messages, and starting the timer when the first message is received includes: starting the timer when a first message corresponding to the first downlink signaling message is received.

[0045] Optionally, the processor is further used to perform the following operations: if a notification message corresponding to each downlink signaling is received within a preset time length corresponding to the timer, stopping the timer.

[0046] Optionally, the sending the downlink signaling to the current RAN node includes: sending a target downlink signaling among multiple downlink signalings to the current RAN node; wherein, the NF node does not receive a notification message corresponding to the target downlink signaling within a preset time length corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

[0047] Optionally, there are multiple downlink signalings, and the multiple downlink signalings share one notification message.

[0048] An embodiment of the present disclosure provides a downlink signaling processing device, which is applied to a source RAN node, including: a first message returning unit, configured to return a first message to a network function NF node and retain the downlink signaling if downlink signaling is received from the NF node during a handover process for a target RAN node; wherein the first message is used to indicate that the source RAN node is currently performing a handover process; a downlink signaling sending unit, configured to send the downlink signaling to the target RAN node; wherein the target RAN node is configured to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

[0049] An embodiment of the present disclosure provides a downlink signaling processing device, which is applied to a target RAN node, including: a downlink signaling processing unit, configured to process the downlink signaling when receiving downlink signaling sent by a source RAN node corresponding to a handover process currently being executed; a notification message sending unit, configured to send a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes a processing result of the downlink signaling.

[0050] An embodiment of the present disclosure provides a downlink signaling processing device, which is applied to a NF node, including: a downlink signaling sending unit, configured to send downlink signaling to a source RAN node; a notification message receiving unit, configured to wait for receiving a notification message for the downlink signaling if a first message returned by the source RAN node for the downlink signaling is received; wherein the first message is used to indicate that the source RAN node is currently executing a handover procedure, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the handover procedure, the target RAN node is used to process the downlink signaling, and send the notification message to the NF node, and the notification message includes a processing result of the downlink signaling.

[0051] An embodiment of the present disclosure provides a processor-readable storage medium, wherein the processor-readable storage medium stores a program, wherein the program is used to enable the processor to execute any of the aforementioned methods.

[0052] In the above technical solution provided by the embodiment of the present disclosure, if the NF node sends downlink signaling to the source RAN node while the source RAN node is executing the handover process, the source RAN node will return a first message (used to indicate that the source RAN node is currently executing the handover process) to the NF node and retain the downlink signaling, and then send the downlink signaling to the target RAN node, and the target RAN node will process the downlink signaling and send a notification message (including the processing result of the downlink signaling) to the NF node. In the above method, the source RAN node will directly send the downlink signaling received during the handover to the target RAN node, so that the target RAN node can process the signaling in time and notify the NF node of the processing result, without the need for the NF node to resend the downlink signaling after determining the handover result, so that the sending and receiving cycle of the downlink signaling can be effectively shortened, and the timeliness of the processing of the downlink signaling can also be effectively guaranteed.

[0053] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present disclosure, nor is it intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0056] Figure 1 A schematic diagram of a network structure provided in an embodiment of the present disclosure;

[0057] FIG. 2( a ) is a network architecture diagram provided by an embodiment of the present disclosure;

[0058] FIG2( b ) is a network architecture diagram provided by an embodiment of the present disclosure;

[0059] FIG2( c ) is a network architecture diagram provided by an embodiment of the present disclosure;

[0060] Figure 3 A flowchart of a downlink signaling processing method provided by an embodiment of the present disclosure;

[0061] Figure 4 A flowchart of a downlink signaling processing method provided by an embodiment of the present disclosure;

[0062] Figure 5A flowchart of a downlink signaling processing method provided by an embodiment of the present disclosure;

[0063] Figure 6 A schematic diagram of an interaction flow of a downlink signaling processing method provided in an embodiment of the present disclosure;

[0064] Figure 7 A schematic diagram of an interaction of a RAN switching process provided by an embodiment of the present disclosure;

[0065] Figure 8 A schematic diagram of an interaction flow of a downlink signaling processing method provided in an embodiment of the present disclosure;

[0066] Fig. 9 A schematic diagram of an interaction flow of a downlink signaling processing method provided in an embodiment of the present disclosure;

[0067] Fig.10 A schematic diagram of an interaction flow of a downlink signaling processing method provided in an embodiment of the present disclosure;

[0068] Fig.11 A schematic diagram of an interaction flow of a downlink signaling processing method provided in an embodiment of the present disclosure;

[0069] Fig.12 A schematic diagram of the structure of a network testing device provided by an embodiment of the present disclosure;

[0070] Fig.13 A schematic diagram of the structure of a network testing device provided by an embodiment of the present disclosure;

[0071] Fig.14 A schematic diagram of the structure of a network testing device provided by an embodiment of the present disclosure;

[0072] Fig.15 A schematic diagram of the structure of a downlink signaling processing device provided in an embodiment of the present disclosure;

[0073] Fig.16 A schematic diagram of the structure of a downlink signaling processing device provided in an embodiment of the present disclosure;

[0074] Fig.17 A schematic diagram of the structure of a downlink signaling processing device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0075] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0076] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0077] In the prior art, if the AMF node sends downlink signaling during the handover, the RAN node will reject the N2 interface process and indicate that the Xn handover is in progress, and then resend it after the handover is successful. Specifically, if the AMF node generates N2 downlink signaling during the handover and receives a rejection message from the NG-RAN (Next Generation Radio Access Network) node for the N2 interface process (such as location reporting control, DL NAS message transmission, etc.), and the message indicates that the Xn handover process is in progress, the AMF node can retry the same N2 interface process when the handover is completed or the handover fails. When the guard timer of the N2 interface process times out, the handover is considered to have failed. In addition, when the RAN node receives the N1 and / or N2 request initiated by the SMF (Session Management Function) node and indicates that the request is temporarily rejected due to the ongoing handover procedure, the SMF node will also start the locally configured guard timer, and any NF node (such as an SMF node) should retain any signaling message for the AMF node for a specific UE during the handover preparation phase, unless it is detected that the handover execution has been completed or the handover has failed / cancelled. When a NF node (such as an SMF node) receives detection information that a switch has been completed or failed or when a timer expires, it can retry to initiate the request, but not more than a pre-configured number of times.

[0078] However, since the above method requires the NF node to try to resend the downlink signaling after the RAN switching succeeds or fails, it not only prolongs the downlink signaling receiving and sending cycle, making it difficult to process the downlink signaling in time, but also requires the NF node to resend the downlink signaling, which also has corresponding problems such as signaling waste. In order to improve at least one of the above problems, the embodiments of the present disclosure provide a downlink signaling processing method, apparatus, network side device and medium, which are described in detail below.

[0079] First, refer to Figure 1 , Figure 1 : is a schematic diagram of a network structure applicable to the embodiment of the present disclosure, including a core network, a source RAN node, a target RAN node, and a terminal device. The source RAN node and the target RAN node in the embodiment of the present disclosure may be a base station or a RAN device, and the specific types of the source RAN node and the target RAN node are not limited here. Figure 1The source RAN node and the target RAN node are simply shown to be connected to the same core network. In actual applications, they may be connected to different core networks, which is not limited here. Figure 1 In the figure, the terminal device is further illustrated, the purpose is to illustrate that the terminal device may be connected to the RAN node, but it does not mean that the terminal device must be involved in the processing of downlink signaling. For example, in some cases, the RAN node can process the downlink signaling by itself without transmitting the downlink signaling to the terminal device. The terminal device can be a device that provides voice and / or data connectivity to the user, a handheld device with wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the terminal device may also be different. For example, in a 5G system, the terminal device can be called a user equipment (User Equipment, UE).

[0080] Further, for ease of understanding, the embodiments of the present disclosure provide network architecture diagrams as shown in FIG. 2(a), FIG. 2(b) and FIG. 2(c), respectively, illustrating three different connection relationships between the RAN node and the core network, and simply illustrating that the RAN architecture includes RAN function unit 1, RAN function unit 2, RAN function unit 3, and RAN function unit n, and simply illustrating that the core network architecture includes NF1, NF2, NF3, NF4, NF5, NFn, etc. It should be noted that FIG. 2(a), FIG. 2(b) and FIG. 2(c) are only simple illustrations of possible connection relationships between the RAN node and the core network in different network architectures, and therefore, the functional units included in the RAN architecture and the NFs included in the core network architecture are not illustrated in detail, and there is no need to limit the specific types of each RAN functional unit or each NF. Among them, the RAN functional unit 2 in FIG. 2(a) can be a CU-CP, and NF4 can be an AMF. FIG. 2(a) presents the network architecture corresponding to the current N2 interface, and the RAN node can establish a connection with the core network through the AMF in the core network. Figures 2(b) and 2(c) are examples of the connection relationship between the RAN node and the core network in the RAN service-oriented scenario. The difference is that Figure 2(b) regards the RAN as a whole, and the RAN is not service-oriented, while the RAN in Figure 2(c) is also service-oriented. The above are simple illustrations of the network architecture applicable to the embodiments of the present disclosure.

[0081] The embodiments of the present disclosure can be well applied to the above network architecture. It can be understood that the network architecture and business scenarios described in the embodiments of the present disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of the present disclosure. Those skilled in the art can know that with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present disclosure are also applicable to similar technical problems.

[0082] The embodiment of the present disclosure first provides a downlink signaling processing method applied to a source RAN node. Figure 3 The schematic diagram of a flow chart of a downlink signaling processing method shown in FIG. 1 shows that the source RAN node mainly performs the following steps S302 to S304:

[0083] Step S302: If downlink signaling is received from a network function NF node during the process of executing a handover process for a target RAN node, a first message is returned to the NF node and the downlink signaling is retained; wherein the first message is used to indicate that the source RAN node is currently executing a handover process.

[0084] The embodiments of the present disclosure do not limit downlink signaling. For example, the downlink signaling may be an N1 message and / or an N2 message. Specifically, the downlink signaling may be a downlink NAS message, a downlink RAN ​​configuration message, a location reporting control message, a downlink RIM information message, etc., which are not listed one by one here.

[0085] The source RAN node in the embodiment of the present disclosure may retain the downlink signaling for subsequent processing based on the retained downlink signaling, such as sending the downlink signaling to the target RAN node, or having the source RAN node process the downlink signaling in the event of a RAN handover failure or handover cancellation, so there is no need for the NF node to send additional downlink signaling.

[0086] Step S304: Send the downlink signaling to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, where the notification message includes the processing result of the downlink signaling.

[0087] The embodiment of the present disclosure does not limit the form in which the source RAN node sends downlink signaling to the target RAN node. For example, the source RAN node can send downlink signaling to the target RAN node alone, or the source RAN node can attach the downlink signaling to other messages that need to be sent to the target RAN node, thereby saving signaling overhead. The source RAN node can send downlink signaling to the target RAN node during the handover process. The embodiment of the present disclosure does not limit the timing when the source RAN node sends downlink signaling to the target RAN node. The specific timing when the source RAN node sends downlink signaling to the target RAN node during the handover process can be flexibly set according to needs.

[0088] The target RAN node processes the downlink signaling in at least two ways: (1) the target RAN node processes the downlink signaling by itself, such as parsing or encapsulating the downlink message. (2) the target RAN node transmits the downlink signaling to the UE. That is, the target RAN node can determine the processing method according to the downlink signaling. For example, if the downlink signaling is a system message, the target RAN node can process it by itself without sending it to the UE. The downlink signaling is terminated at the target RAN node. If the downlink signaling is a message that needs to be received by the UE, the target RAN node needs to transmit the downlink signaling to the UE.

[0089] The target RAN node may also directly send a notification message containing the processing result of the downlink signaling to the NF node. For example, when the target RAN node sends the downlink signaling to the UE, the processing result of the downlink signaling may be used to inform the NF node of the success or failure of the downlink signaling transmission.

[0090] In the above manner, the source RAN node will directly send the downlink signaling received during the handover to the target RAN node, so that the target RAN node can process the signaling in time and notify the NF node of the processing result. There is no need for the NF node to resend the downlink signaling after determining the handover result. Therefore, the sending and receiving cycle of the downlink signaling can be effectively shortened, and the timeliness of the processing of the downlink signaling can be effectively guaranteed.

[0091] In some implementations of the above step S304, the embodiment of the present disclosure provides two opportunities for the source RAN node to send downlink signaling to the target RAN node, which are described below respectively:

[0092] Opportunity 1: When receiving the resource release message sent by the target RAN node, the source RAN node sends the downlink signaling to the target RAN node.

[0093] In some specific implementation examples, the resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0094] In some other specific implementation examples, the resource release message does not carry a signaling transmission identifier, and the source RAN node automatically sends the downlink signaling from the NF node after receiving the resource release message from the target RAN node by default.

[0095] Opportunity 2: When the source RAN node receives the end marker sent by the NF node, it sends the downlink signaling to the target RAN node; wherein the end marker is used to indicate that the downlink data has been sent, and the downlink data can specifically be downlink user data. Exemplarily, the end marker can be an N3 End marker. Specifically, the N3 End marker is sent by the NF node to the user plane of the source RAN node, and the user plane of the source RAN node can instruct the control plane of the source RAN node to send the downlink signaling to the target RAN node.

[0096] In practical applications, the above-mentioned timing 1 or timing 2 can be flexibly selected according to needs, and no limitation is made here. In addition, the source RAN node does not need to send downlink signaling to the target RAN node alone, but can attach the downlink signaling to other messages and bring them to the target RAN node. For example, in the case of timing 1, the source RAN node can attach the downlink signaling to the resource release confirmation message that originally needs to be returned to the target RAN node. Therefore, not only will the signaling overhead not be increased, but compared with the prior art, the embodiment of the present disclosure will further reduce the overhead of the downlink signaling sent by the NF after determining the handover result.

[0097] In some implementations of the above step S304, when there are multiple downlink signaling messages, the source RAN node combines the multiple downlink signaling messages and sends them to the target RAN node. By the above method, the signaling overhead can also be effectively reduced.

[0098] In some specific implementations, the first message also carries information about the target RAN node. That is, the source RAN node not only informs the NF node that the handover process is currently being executed, but also informs the NF node of the information about the target RAN node, so that the NF node can directly send downlink signaling to the target RAN node when needed. For example, if the timer set by the NF node times out, but the NF node still has not received the processing result of the downlink signaling from the target RAN node, it can send downlink signaling to the target RAN node again. The reasons for the above problems include but are not limited to the source RAN node failing to successfully send the downlink signaling to the target RAN node, or the RAN handover process is not completed. Through the above method, it can effectively ensure that the downlink signaling can be transmitted to the target RAN node, and improve the reliability of signaling processing.

[0099] In some implementations, the source RAN node may further perform the following steps: if the handover process fails or if the handover process is canceled, then process the downlink signaling. Since the source RAN node saves the downlink signaling, the downlink signaling may be directly processed if the handover process fails or if the handover process is terminated. The way the source RAN node processes the downlink signaling may refer to the way the target node processes the downlink signaling, and will not be described in detail here.

[0100] The present disclosure further provides a downlink signaling processing method applied to a target RAN node. Figure 4 The flowchart of a downlink signaling processing method shown in FIG. 1 is a flowchart of a downlink signaling processing method, in which the target RAN node mainly performs the following steps S402 to S404:

[0101] Step S402: upon receiving downlink signaling sent by the source RAN node corresponding to the currently executed handover process, the target RAN node processes the downlink signaling. The specific manner in which the target RAN node processes the downlink signaling can refer to the above-mentioned related contents, which will not be described in detail here.

[0102] Step S404, sending a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes the processing result of the downlink signaling. Specifically, the downlink signaling is sent by the NF node to the source RAN node during the RAN handover process.

[0103] In the above manner, the target RAN node can promptly process the downlink signaling sent by the source RAN node during the handover and notify the NF node of the processing result. The NF node does not need to resend the downlink signaling after the RAN handover succeeds or fails. Therefore, the sending and receiving cycle of the downlink signaling can be effectively shortened, and the timeliness of the processing of the downlink signaling can be effectively guaranteed.

[0104] In some specific implementations, the resource release message sent to the source RAN node during the handover process carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node. By setting the above identifier, the source RAN node can be clearly instructed to transmit the received downlink signaling to the target RAN node. In addition, the resource release message may not carry the signaling transmission identifier, but the default source RAN node automatically sends the downlink signaling from the NF node to the target RAN node after receiving the resource release message.

[0105] In some implementations of the above step S404, when the number of received downlink signalings is multiple, the target RAN node sends a notification message to the NF node corresponding to the downlink signaling, and the notification message includes the processing results of the multiple downlink signalings. In the above manner, the NF node can be informed of the processing results of multiple downlink signalings in a centralized manner using one notification message, which can effectively save signaling overhead compared to the case where a corresponding notification message is sent for each downlink signaling.

[0106] In some implementations, the target RAN node may also directly receive downlink signaling sent by the NF node. The disclosed embodiment does not limit the triggering condition for the NF node to send downlink signaling to the target RAN node. Exemplarily, the first message sent by the source RAN node to the NF node also carries information of the target RAN node, so that the NF node can directly send downlink signaling to the target RAN node as required. For example, if the timer set by the NF node times out but the NF node still has not received the processing result of the downlink signaling from the target RAN node, the NF node can send downlink signaling to the target RAN node again, thereby ensuring that the target RAN node can reliably receive and process the downlink signaling.

[0107] The present disclosure further provides a downlink signaling processing method applied to an NF node. Figure 5 The flowchart of a downlink signaling processing method shown in FIG. 1 is a flowchart of a downlink signaling processing method, in which the NF node mainly performs the following steps S502 to S504:

[0108] Step S502: Send downlink signaling to the source RAN node. The embodiment of the present disclosure does not restrict the timing when the NF node sends downlink signaling to the source RAN node.

[0109] Step S504: If a first message returned by the source RAN node for downlink signaling is received, wait for receiving a notification message for downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a handover process, and the downlink signaling is sent by the source RAN node to the target RAN node corresponding to the handover process, the target RAN node is used to process the downlink signaling, and send a notification message to the NF node, the notification message including the processing result of the downlink signaling.

[0110] In the above manner, even if the NF node sends downlink signaling to the source RAN node during the switching of the source RAN node, the source RAN node will directly send the downlink signaling to the target RAN node. The target RAN node can process the signaling in time and notify the NF node of the processing result. The NF node does not need to resend the downlink signaling after the RAN switching succeeds or fails. Therefore, the sending and receiving cycle of the downlink signaling can be effectively shortened, and the timeliness of the processing of the downlink signaling can be effectively guaranteed.

[0111] In some implementations, the first message also carries information of the target RAN node.

[0112] In some implementations, the NF node may also send downlink signaling to the target RAN node.

[0113] The above implementation methods can refer to the aforementioned related contents and will not be described again here.

[0114] In some implementations, the NF node may also perform the following steps A to C:

[0115] Step A: starting a timer when receiving a first message.

[0116] When the number of downlink signaling is one, the timer is started when the first message corresponding to the downlink signaling is received.

[0117] In the case where there are multiple downlink signaling messages, illustratively, the following method 1 or method 2 may be used to implement the downlink signaling message:

[0118] Method 1: For the first message corresponding to each downlink signaling, the timer corresponding to the first message is started when the first message is received. In other words, the NF node starts a corresponding timer for each first message corresponding to each downlink signaling during the switching period. If there are N downlink signalings in total, at most N timers are started, and the start time of different timers may be different, mainly depending on the reception time of the first message corresponding to each timer.

[0119] Method 2: Start the timer when receiving the first message corresponding to the first downlink signaling. In other words, the NF node starts only one timer for the first messages corresponding to multiple downlink signalings during the switching period, and starts the timer when receiving the first message corresponding to the first downlink signaling.

[0120] Step B: If the notification message is not received within the preset time length corresponding to the timer, the current RAN node of the service terminal is determined; wherein the current RAN node is the source RAN node or the target RAN node. That is, if the timer times out, but the NF node still does not receive the notification message from the target RAN node, it may be that the source RAN node has not successfully sent the downlink signaling to the target RAN node, or the RAN handover process has not been completed, or the RAN handover has failed or been canceled. Therefore, the NF node can first determine the current RAN node, which may be the source RAN node or the target RAN node.

[0121] Step C: Send downlink signaling to the current RAN node. The NF node sends downlink signaling to the current RAN node so that the current RAN node can process the downlink signaling in time, effectively ensuring the processing reliability of the downlink signaling.

[0122] In some implementations of the above step C, the NF node sends a target downlink signaling among multiple downlink signalings to the current RAN node; wherein the NF node does not receive a notification message corresponding to the target downlink signaling within a preset duration corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling. That is, the NF node only needs to send the downlink signaling (target downlink signaling) for which the processing result has not been received to the current RAN node, so that the current RAN node can process the target downlink signaling.

[0123] The NF node may also perform the following steps: if a notification message is received within the preset duration corresponding to the timer, the timer is stopped. In the case where there are multiple downlink signaling messages, for example, the following methods (1) and (2) may be used to implement the communication:

[0124] Method (1): for each timer, if a notification message corresponding to the timer is received within the preset duration corresponding to the timer, the timer is stopped. Method (1) is performed on the basis of the above-mentioned method 1.

[0125] Mode (2): If a notification message corresponding to each downlink signaling is received within the preset duration corresponding to the timer, the timer is stopped. Mode (2) is performed on the basis of the aforementioned mode 2. That is, in mode 2, notification messages corresponding to multiple downlink signaling share one timer, and the timer is stopped only when notification messages corresponding to multiple downlink signaling are received.

[0126] In some implementations, when there are multiple downlink signalings, the multiple downlink signalings share one notification message. In other words, after receiving multiple downlink signalings from the same NF node, the target RAN node can combine the processing results corresponding to the multiple downlink signalings into one notification message and send it to the NF node.

[0127] Based on the foregoing, the embodiments of the present disclosure provide multiple examples of interaction between the source RAN node, the target RAN node, and the NF node. For details, please refer to the following implementation examples 1 to 6:

[0128] Implementation example 1:

[0129] Implementation Example 1 briefly illustrates the core interaction steps between the source RAN node, the target RAN node and the NF node. Figure 6 The interactive flow diagram of a downlink signaling processing method shown in the figure mainly illustrates the following steps S602 to S610 during the handover of the RAN node:

[0130] Step S602: The NF node sends downlink signaling to the source RAN node.

[0131] Step S604: The source RAN node indicates to the NF node that the handover process is currently being executed.

[0132] Step S606: The source RAN node sends downlink signaling to the target RAN node.

[0133] Step S608: The target RAN node processes the downlink signaling.

[0134] Step S610: The target RAN node sends a processing result of the downlink signaling to the NF node.

[0135] It should be noted that Figure 6 The specific steps of the RAN handover process are not illustrated, but only the main interaction steps of the source RAN node, the target RAN node and the NF node for downlink signaling during the RAN handover are simply illustrated.

[0136] Further, in order to facilitate understanding of the RAN switching process, the embodiment of the present disclosure provides the following Figure 7 The interactive schematic diagram of a RAN handover process shown mainly illustrates the interactive process of the UE, the source RAN node, the target RAN node, the AMF node, the SMF node and the UPF (User Plane Function) node during the execution of the RAN handover, including the following steps 1 to 9:

[0137] Step 1a: The source RAN node reports RAN usage data to the AMF node.

[0138] Step 1b: The target RAN node sends an N2 path switching request to the AMF node.

[0139] Step 2: The AMF node sends an Nsmf_PDU session update SMC context request to the SMF node.

[0140] Step 3: The SMF node sends an N4 session modification request to the UPF node.

[0141] Step 4: The UPF node sends an N4 session modification response to the SMF node.

[0142] Step 5: The UPF node sends an N3 end identifier to the source RAN node, and the source RAN node sends an N3 end identifier to the target RAN node.

[0143] Step 6: The SMF node sends an Nsmf_PDU session update SMC context response to the AMF node.

[0144] Step 7: The AMF node sends an N2 path switching request confirmation to the target RAN node.

[0145] Step 8: The target RAN node sends a resource release message to the source RAN node.

[0146] Step 9, registration process.

[0147] The embodiments of the present disclosure do not limit the specific execution timing of the step of the source RAN node sending the downlink signaling to the target RAN node during the RAN handover process.

[0148] Implementation Example 2:

[0149] Based on the implementation example 1, the implementation example 2 further illustrates a downlink signaling processing method during the RAN handover process, see Figure 8 The interactive flow diagram of a downlink signaling processing method shown mainly illustrates the following steps S802 to S814:

[0150] Step S802: The NF node sends downlink signaling to the source RAN node.

[0151] Step S804: The source RAN node indicates to the NF node that the handover process is currently being executed.

[0152] Step S806, executing some steps in the RAN switching process.

[0153] Step S808: The source RAN node sends downlink signaling to the target RAN node.

[0154] Step S810, executing the remaining steps in the RAN handover process.

[0155] Step S812: The target RAN node sends the downlink signaling to the UE. In the second implementation example, the target RAN node processes the downlink signaling by transmitting the downlink signaling to the UE as an example.

[0156] Step S814: the target RAN node sends a processing result of the downlink signaling to the NF node. The processing result is used to inform the NF node of the success or failure of the downlink signaling transmission.

[0157] Understandably, Figure 8 It is only for illustrative purposes, and the step numbers do not represent an absolute order of precedence. For example, in some specific implementation examples, step S812 may be executed simultaneously with step S810, that is, during the execution of the remaining steps of the RAN handover process, the target RAN node may send downlink signaling to the UE.

[0158] Implementation example three:

[0159] On the basis of implementation example 2, implementation example 3 provides a timing for a source RAN node to send downlink signaling to a target RAN node (corresponding to the aforementioned timing 1), see Fig. 9 The interactive flow diagram of a downlink signaling processing method shown mainly illustrates the following steps S902 to S916:

[0160] Step S902: The NF node sends downlink signaling to the source RAN node.

[0161] Step S904: The source RAN node indicates to the NF node that the handover process is currently being executed.

[0162] Step S906, executing steps 1 to 7 in the RAN handover process. For details of steps 1 to 7, please refer to the above Figure 7 , I will not go into details here.

[0163] Step S908: The target RAN node sends a resource release message (carrying a downlink signaling transmission indication) to the source RAN node, wherein the downlink signaling transmission indication corresponds to the aforementioned signaling transmission identifier.

[0164] Step S910: The source RAN node sends a resource release confirmation message (carrying downlink signaling) to the target RAN node. Step S908 corresponds to step S910. Figure 7 Step 8 of the RAN handover process shown in FIG. Figure 7 The step of the source RAN node returning a resource release confirmation message to the target RAN node is omitted and not explicitly indicated.

[0165] Step S912: Execute step 9 in the RAN switching process.

[0166] Step S914: The target RAN node sends downlink signaling to the UE.

[0167] Step S916: The target RAN node sends the processing result of the downlink signaling to the NF node.

[0168] Implementation example 4:

[0169] On the basis of implementation example 2, implementation example 4 provides a timing for a source RAN node to send downlink signaling to a target RAN node (corresponding to the aforementioned timing 2), see Fig.10 The interactive flow diagram of a downlink signaling processing method shown mainly illustrates the following steps S1002 to S1014:

[0170] Step S1002: The NF node sends downlink signaling to the source RAN node.

[0171] Step S1004: The source RAN node indicates to the NF node that the handover process is currently being executed.

[0172] Step S1006, execute steps 1 to 4 in the RAN handover process. For details of steps 1 to 4, refer to the above Figure 7 , I will not go into details here.

[0173] Step S1008: The NF node sends an N3 end identifier to the source RAN node.

[0174] Step S1010: The source RAN node sends an N3 end identifier to the target RAN node. Steps S1008 to S1010 correspond to step 5.

[0175] Step S1012: The source RAN node sends downlink signaling to the target RAN node.

[0176] Step S1014: The target RAN node sends downlink signaling to the UE.

[0177] Step S1016: The target RAN node sends the processing result of the downlink signaling to the NF node.

[0178] Step S1018, execute steps 6 to 9 in the RAN handover process. Steps 6 to 9 may refer to the aforementioned Figure 7 , I will not go into details here.

[0179] Implementation Example 5:

[0180] Based on the aforementioned implementation examples 1 to 4, implementation example 5 mainly illustrates the improvement method on the NF node side. Specifically, after receiving the message sent by the source RAN node that the switching process is currently being executed, the NF node can start the timer. If the timer times out and the processing result sent by the target RAN for the downlink signaling (that is, the aforementioned notification message) has not been received, the NF node can determine the current RAN node (source RAN node or target RAN node), and then resend the downlink signaling to the current RAN node. If the NF node receives the processing result sent by the target RAN for the downlink signaling before the timer times out, the timer is stopped. If during the RAN node switching, the source RAN receives downlink signaling from the same NF node, the NF node can use the following two mechanisms when starting the timer:

[0181] Mechanism 1: The NF node starts a corresponding timer for each downlink signaling during the switching period.

[0182] Mechanism 2: Multiple downlink signalings sent by the NF node share the first timer started during the handover. When the timer expires, the NF node only resends the downlink signaling for which the processing result has not been received from the target RAN node. After the NF node receives the processing results of all downlink signalings from the target RAN node during the handover, the NF node can stop the timer.

[0183] In actual applications, after the target RAN node receives multiple downlink signalings from the same NF node, it can also combine the processing results of the multiple downlink signalings in implementation examples 1 to 5 into one notification message and send it to the NF node.

[0184] Implementation Example 6:

[0185] The embodiments of the present disclosure do not limit the downlink signaling, such as N1 message and / or N2 message, etc. In the sixth embodiment, the downlink signaling is the application of the location reporting control message (Location Reporting Control) in the third embodiment as an example, and the NF node is an LMF node, see Fig.11 The interactive flow diagram of a downlink signaling processing method shown mainly illustrates the following steps S1102 to S1108:

[0186] Step S1102: The LMF node sends a downlink location message to the source RAN node.

[0187] Step S1104: The source RAN node indicates to the LMF node that the handover process is currently being executed.

[0188] Step S1106, executing steps 1 to 7 in the RAN switching process.

[0189] Step S1108: The target RAN node sends a resource release message (carrying a downlink signaling transmission indication) to the source RAN node.

[0190] Step S1110: The source RAN node returns a resource release confirmation message (carrying a downlink location message) to the target RAN node.

[0191] Step S1112: The target RAN node sends a downlink location message to the UE.

[0192] Step S1114: The target RAN node sends the processing result of the downlink location message to the NF node.

[0193] It should be noted that the above-mentioned Implementation Examples 1 to 6 are exemplary descriptions provided by the embodiments of the present disclosure, which can be flexibly adjusted according to needs in actual applications and are not limited here.

[0194] In summary, in the downlink signaling processing method provided by the embodiment of the present disclosure, the source RAN node will directly send the downlink signaling received during the handover to the target RAN node, so that the target RAN node can process the signaling in time and notify the NF node of the processing result. There is no need for the NF node to resend the downlink signaling after determining the handover result. Therefore, the downlink signaling receiving and sending cycle can be effectively shortened, and the timeliness of downlink signaling processing can be effectively guaranteed. Furthermore, the downlink signaling sent by the source RAN node to the target RAN node can be attached to other messages and sent together without being sent separately, so there is no additional signaling overhead. On the contrary, since there is no need for the NF node to resend the downlink signaling after determining the handover result, compared with the related art, it can also effectively save signaling overhead and simplify the processing logic of the NF node.

[0195] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure further provides a network side device, which serves as a source RAN node, such as Fig.12 The schematic diagram of the structure of a network test device shown includes a memory 1200, a transceiver 1210, and a processor 1220:

[0196] The memory 1200 is used to store computer programs; the transceiver 1210 is used to send and receive data under the control of the processor; the processor 1220 is used to read the computer program in the memory 1200 and perform the following operations:

[0197] If a downlink signaling is received from a network function NF node during the process of executing a handover procedure for a target RAN node, a first message is returned to the NF node and the downlink signaling is retained; wherein the first message is used to indicate that the source RAN node is currently executing a handover procedure;

[0198] The downlink signaling is sent to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes the processing result of the downlink signaling.

[0199] Among them, Fig.12In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 1220 represented by processor 1220 and various circuits of memory 1200 represented by memory 1200 are linked together. The bus architecture may also link together various other circuits such as peripherals, 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 1210 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 may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 1220 is responsible for managing the bus architecture and general processing, and the memory 1200 may store data used by the processor 1220 when performing operations.

[0200] The processor 1220 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor 1220 may also adopt a multi-core architecture.

[0201] In a possible implementation manner of the embodiment of the present disclosure, sending downlink signaling to the target RAN node includes: sending the downlink signaling to the target RAN node when a resource release message sent by the target RAN node is received.

[0202] In a possible implementation manner of the embodiment of the present disclosure, the resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0203] In a possible implementation manner of the embodiment of the present disclosure, sending downlink signaling to the target RAN node includes: sending downlink signaling to the target RAN node when an end identifier sent by the NF node is received; wherein the end identifier is used to indicate that the downlink data has been sent.

[0204] In a possible implementation manner of the embodiment of the present disclosure, sending the downlink signaling to the target RAN node includes: when there are multiple downlink signaling messages, combining the multiple downlink signaling messages and sending them to the target RAN node.

[0205] In a possible implementation manner of the embodiment of the present disclosure, the first message also carries information of the target RAN node.

[0206] In a possible implementation manner of the embodiment of the present disclosure, the processor 1220 is further configured to perform the following operations: if the handover process fails or if the handover process is canceled, then process downlink signaling.

[0207] It should be noted here that the network side device provided in the embodiment of the present invention can implement the corresponding method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0208] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure further provides a network side device, which serves as a target RAN node, such as Fig.13 The schematic diagram of the structure of a network test device shown includes a memory 1300, a transceiver 1310, and a processor 1320:

[0209] The memory 1300 is used to store computer programs; the transceiver 1310 is used to send and receive data under the control of the processor; the processor 1320 is used to read the computer program in the memory 1300 and perform the following operations:

[0210] Upon receiving downlink signaling sent by a source RAN node corresponding to a handover procedure currently being executed, processing the downlink signaling;

[0211] A notification message is sent to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes the processing result of the downlink signaling.

[0212] Among them, Fig.13 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 1320 represented by processor 1320 and various circuits of memory 1300 represented by memory 1300 are linked together. The bus architecture may also link together various other circuits such as peripherals, 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 1310 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 may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 1320 is responsible for managing the bus architecture and general processing, and the memory 1300 may store data used by the processor 1320 when performing operations.

[0213] The processor 1320 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor 1320 may also adopt a multi-core architecture.

[0214] In a possible implementation manner of the embodiment of the present disclosure, a resource release message sent to a source RAN node during a handover process carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0215] In a possible implementation of the embodiment of the present disclosure, a notification message is sent to the NF node corresponding to the downlink signaling, including: when the number of received downlink signaling is multiple, a notification message is sent to the NF node corresponding to the downlink signaling, and the notification message includes the processing results of the multiple downlink signaling.

[0216] In a possible implementation manner of the embodiment of the present disclosure, the processor 1320 is further configured to perform the following operations: receiving downlink signaling sent by the NF node.

[0217] It should be noted here that the network side device provided in the embodiment of the present invention can implement the corresponding method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0218] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure further provides a network side device, which serves as an NF node, such as Fig.14 The schematic diagram of the structure of a network test device shown includes a memory 1400, a transceiver 1410, and a processor 1420:

[0219] The memory 1400 is used to store computer programs; the transceiver 1410 is used to send and receive data under the control of the processor; the processor 1420 is used to read the computer program in the memory 1400 and perform the following operations:

[0220] Sending downlink signaling to the source RAN node;

[0221] If a first message returned by the source RAN node for downlink signaling is received, wait for receiving a notification message for downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a switching process, and the downlink signaling is sent by the source RAN node to the target RAN node corresponding to the switching process, the target RAN node is used to process the downlink signaling and send a notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

[0222] Among them, Fig.14 In the embodiment, the bus architecture may include any number of interconnected buses and bridges, specifically one or more processors 1420 represented by processor 1420 and various circuits of memory 1400 represented by memory 1400 are linked together. The bus architecture may also link together various other circuits such as peripherals, 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 1410 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 may include a wireless channel, a wired channel, an optical cable, and other transmission media. The processor 1420 is responsible for managing the bus architecture and general processing, and the memory 1400 may store data used by the processor 1420 when performing operations.

[0223] The processor 1420 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or a complex programmable logic device (CPLD). The processor 1420 may also adopt a multi-core architecture.

[0224] In a possible implementation manner of the embodiment of the present disclosure, the first message also carries information of the target RAN node.

[0225] In a possible implementation manner of the embodiment of the present disclosure, the processor 1420 is further configured to perform the following operations: sending downlink signaling to the target RAN node.

[0226] In a possible implementation manner of the embodiment of the present disclosure, the processor 1420 is further used to perform the following operations: start a timer when a first message is received; if no notification message is received within a preset time length corresponding to the timer, determine a current RAN node of the service terminal; wherein the current RAN node is a source RAN node or a target RAN node; and send downlink signaling to the current RAN node.

[0227] In a possible implementation of the embodiment of the present disclosure, the processor 1420 is further configured to perform the following operations: if a notification message is received within a preset time period corresponding to the timer, stop the timer.

[0228] In a possible implementation of the embodiment of the present disclosure, there are multiple downlink signalings, and a timer is started when a first message is received, including: for each first message corresponding to the downlink signaling, starting the timer corresponding to the first message when the first message is received.

[0229] In a possible implementation of the embodiment of the present disclosure, the processor 1420 is further configured to perform the following operations: for each timer, if a notification message corresponding to the timer is received within a preset time period corresponding to the timer, the timer is stopped.

[0230] In a possible implementation manner of the embodiment of the present disclosure, there are multiple downlink signalings, and starting the timer when the first message is received includes: starting the timer when the first message corresponding to the first downlink signaling is received.

[0231] In a possible implementation of the embodiment of the present disclosure, the processor 1420 is further configured to perform the following operations: if a notification message corresponding to each downlink signaling is received within a preset time period corresponding to the timer, the timer is stopped.

[0232] In a possible implementation manner of the embodiment of the present disclosure, sending downlink signaling to the current RAN node includes: sending target downlink signaling among multiple downlink signalings to the current RAN node; wherein the NF node does not receive a notification message corresponding to the target downlink signaling within a preset time length corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

[0233] In a possible implementation manner of the embodiment of the present disclosure, there are multiple downlink signaling messages, and the multiple downlink signaling messages share one notification message.

[0234] It should be noted here that the network side device provided in the embodiment of the present invention can implement the corresponding method steps implemented by the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0235] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure also provides a downlink signaling processing device, which can be applied to a source RAN node, such as Fig.15 The structural diagram of a downlink signaling processing device shown includes:

[0236] The first message returning unit 1500 is configured to return a first message to the NF node and retain the downlink signaling if downlink signaling is received from the network function NF node during the process of executing the handover process for the target RAN node; wherein the first message is used to indicate that the source RAN node is currently executing the handover process;

[0237] The downlink signaling sending unit 1510 is used to send the downlink signaling to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

[0238] In a possible implementation manner of the embodiment of the present disclosure, the downlink signaling sending unit 1510 is specifically configured to: upon receiving a resource release message sent by the target RAN node, send the downlink signaling to the target RAN node.

[0239] In a possible implementation manner of the embodiment of the present disclosure, the resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0240] In a possible implementation manner of the embodiment of the present disclosure, the downlink signaling sending unit 1510 is specifically used to: upon receiving an end identifier sent by the NF node, send the downlink signaling to the target RAN node; wherein the end identifier is used to indicate that the downlink data has been sent.

[0241] In a possible implementation manner of the embodiment of the present disclosure, the downlink signaling sending unit 1510 is specifically configured to: when there are multiple downlink signaling messages, combine the multiple downlink signaling messages and send them to the target RAN node.

[0242] In a possible implementation manner of the embodiment of the present disclosure, the first message further carries information of the target RAN node.

[0243] In a possible implementation manner of the embodiment of the present disclosure, the device further includes a signaling processing unit, which is configured to process the downlink signaling if the switching process fails to be executed or if the switching process is canceled.

[0244] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement the corresponding method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0245] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure also provides a downlink signaling processing device, which can be applied to a target RAN node, such as Fig.16 The structural diagram of a downlink signaling processing device shown includes:

[0246] The downlink signaling processing unit 1600 is configured to process the downlink signaling upon receiving the downlink signaling sent by the source RAN node corresponding to the handover process currently being executed;

[0247] The notification message sending unit 1610 is used to send a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes the processing result of the downlink signaling.

[0248] In a possible implementation manner of the embodiment of the present disclosure, the resource release message sent to the source RAN node during the execution of the switching process carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

[0249] In a possible implementation of the embodiment of the present disclosure, the notification message sending unit 1610 is specifically used to: when the number of received downlink signaling is multiple, send a notification message to the NF node corresponding to the downlink signaling, and the one notification message includes the processing results of the multiple downlink signaling.

[0250] In a possible implementation manner of the embodiment of the present disclosure, the device also includes a signaling receiving unit, which is used to receive downlink signaling sent by the NF node.

[0251] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement the corresponding method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effects. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0252] In order to implement the above-mentioned downlink signaling processing method, the embodiment of the present disclosure also provides a downlink signaling processing device, which can be applied to NF nodes, such as Fig.17 The structural diagram of a downlink signaling processing device shown includes:

[0253] A downlink signaling sending unit 1700, configured to send downlink signaling to a source RAN node;

[0254] The notification message receiving unit 1710 is configured to wait for receiving a notification message for downlink signaling if a first message returned by the source RAN node for downlink signaling is received; wherein the first message is used to indicate that the source RAN node is currently executing a handover process, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the handover process, the target RAN node is used to process the downlink signaling, and send a notification message to the NF node, where the notification message includes a processing result of the downlink signaling.

[0255] In a possible implementation manner of the embodiment of the present disclosure, the first message further carries information of the target RAN node.

[0256] In a possible implementation manner of the embodiment of the present disclosure, the device further includes a signaling sending unit, configured to send the downlink signaling to the target RAN node.

[0257] In a possible implementation of the embodiment of the present disclosure, the device further includes:

[0258] A timer starting unit, configured to start a timer upon receiving the first message;

[0259] a RAN node determining unit, configured to determine a current RAN node of the service terminal if the notification message is not received within a preset duration corresponding to the timer; wherein the current RAN node is the source RAN node or the target RAN node;

[0260] A signaling sending unit is used to send the downlink signaling to the current RAN node.

[0261] In a possible implementation manner of the embodiment of the present disclosure, the device further includes a timer stopping unit, which is used to: stop the timer if the notification message is received within a preset time period corresponding to the timer.

[0262] In a possible implementation manner of the embodiment of the present disclosure, there are multiple downlink signalings, and the timer starting unit is specifically used to: for each first message corresponding to the downlink signaling, start the timer corresponding to the first message when the first message is received.

[0263] In a possible implementation manner of the embodiment of the present disclosure, the device further includes a timer stopping unit, which is used to stop each timer if a notification message corresponding to the timer is received within a preset time period corresponding to the timer.

[0264] In a possible implementation manner of the embodiment of the present disclosure, there are multiple downlink signalings, and the timer starting unit is specifically used to start the timer when a first message corresponding to the first downlink signaling is received.

[0265] In a possible implementation manner of the embodiment of the present disclosure, the device further includes a timer stopping unit, configured to stop the timer if a notification message corresponding to each downlink signaling is received within a preset time period corresponding to the timer.

[0266] In a possible implementation manner of the embodiment of the present disclosure, the signaling sending unit is specifically used to: send a target downlink signaling in a plurality of the downlink signalings to the current RAN node; wherein the NF node does not receive a notification message corresponding to the target downlink signaling within a preset time length corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

[0267] In a possible implementation manner of the embodiment of the present disclosure, there are multiple downlink signaling messages, and the multiple downlink signaling messages share one notification message.

[0268] It should be noted here that the above-mentioned device provided in the embodiment of the present disclosure can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as those in the method embodiment will not be described in detail here.

[0269] It should be noted that the unit division of the downlink signaling processing device in the embodiments of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0270] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the method described in each embodiment of the present disclosure.

[0271] 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 aforementioned downlink signaling processing method. 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)), 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.

[0272] Those skilled in the art will appreciate that the embodiments of the present disclosure may be provided as methods, devices, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program code.

[0273] The present disclosure is described with reference to the flowcharts and / or block diagrams of the methods, apparatuses, and computer program products according to the embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0274] These processor executable instructions may also be stored in a processor readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the processor readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0275] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A downlink signaling processing method, characterized in that: Applied to the source radio access network RAN ​​node, including: If a downlink signaling is received from a network function NF node during the process of executing a handover procedure for a target RAN node, a first message is returned to the NF node, and the downlink signaling is retained; wherein the first message is used to indicate that the source RAN node is currently executing a handover procedure; The downlink signaling is sent to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

2. The method according to claim 1, characterized in that The sending the downlink signaling to the target RAN node includes: In case of receiving the resource release message sent by the target RAN node, the downlink signaling is sent to the target RAN node.

3. The method according to claim 2, characterized in that The resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

4. The method according to claim 1, characterized in that: The sending the downlink signaling to the target RAN node includes: When the end identifier sent by the NF node is received, the downlink signaling is sent to the target RAN node; wherein the end identifier is used to indicate that the downlink data has been sent.

5. The method according to claim 1, characterized in that The sending the downlink signaling to the target RAN node includes: In the case that there are multiple downlink signaling messages, the multiple downlink signaling messages are combined and sent to the target RAN node.

6. The method according to claim 1, characterized in that The first message also carries information of the target RAN node.

7. The method according to claim 1, characterized in that The method further comprises: If the handover process fails to be executed or if the handover process is canceled, the downlink signaling is processed.

8. A downlink signaling processing method, characterized in that: Applied to NF nodes, including: Sending downlink signaling to the source RAN node; If a first message returned by the source RAN node for the downlink signaling is received, wait for receiving a notification message for the downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a switching process, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the switching process, the target RAN node is used to process the downlink signaling and send the notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

9. The method according to claim 8, characterized in that The first message also carries information of the target RAN node.

10. The method according to claim 9, characterized in that The method further comprises: The downlink signaling is sent to the target RAN node.

11. The method according to claim 9, characterized in that The method further comprises: starting a timer upon receiving the first message; If the notification message is not received within the preset duration corresponding to the timer, determining a current RAN node of the service terminal; wherein the current RAN node is the source RAN node or the target RAN node; Sending the downlink signaling to the current RAN node.

12. The method according to claim 11, characterized in that The method further comprises: If the notification message is received within the preset duration corresponding to the timer, the timer is stopped.

13. The method according to claim 11, characterized in that The number of the downlink signaling is multiple, and starting the timer when the first message is received includes: For each first message corresponding to the downlink signaling, a timer corresponding to the first message is started when the first message is received.

14. The method according to claim 13, characterized in that The method further comprises: For each of the timers, if a notification message corresponding to the timer is received within a preset duration corresponding to the timer, the timer is stopped.

15. The method according to claim 11, characterized in that The number of the downlink signaling is multiple, and starting the timer when the first message is received includes: The timer is started when a first message corresponding to the first downlink signaling is received.

16. The method according to claim 15, characterized in that The method further comprises: If a notification message corresponding to each downlink signaling is received within a preset time period corresponding to the timer, the timer is stopped.

17. The method according to any one of claims 13 to 16, characterized in that The sending the downlink signaling to the current RAN node includes: Sending a plurality of target downlink signalings in the downlink signaling to the current RAN node; wherein the NF node does not receive a notification message corresponding to the target downlink signaling within a preset duration corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

18. The method according to claim 8, characterized in that There are multiple downlink signaling messages, and the multiple downlink signaling messages share one notification message.

19. A downlink signaling processing method, characterized in that: Applied to target RAN nodes, including: Upon receiving downlink signaling sent by a source RAN node corresponding to a handover procedure currently being executed, processing the downlink signaling; Sending a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes a processing result of the downlink signaling.

20. The method according to claim 19, characterized in that The resource release message sent to the source RAN node during the handover process carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

21. The method according to claim 19, characterized in that The sending a notification message to the NF node corresponding to the downlink signaling includes: In the case where the number of received downlink signalings is multiple, a notification message is sent to the NF node corresponding to the downlink signaling, and the notification message includes the processing results of the multiple downlink signalings.

22. The method according to claim 19, characterized in that The method further comprises: Receive downlink signaling sent by the NF node.

23. A network side device, characterized in that: The network side device serves as a source RAN node, including a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: If a downlink signaling is received from a network function NF node during the process of executing a handover procedure for a target RAN node, a first message is returned to the NF node, and the downlink signaling is retained; wherein the first message is used to indicate that the source RAN node is currently executing a handover procedure; The downlink signaling is sent to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

24. The network side device according to claim 23, characterized in that: The sending the downlink signaling to the target RAN node includes: In case of receiving the resource release message sent by the target RAN node, the downlink signaling is sent to the target RAN node.

25. The network side device according to claim 24, characterized in that: The resource release message carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

26. The network side device according to claim 23, characterized in that: The sending the downlink signaling to the target RAN node includes: When the end identifier sent by the NF node is received, the downlink signaling is sent to the target RAN node; wherein the end identifier is used to indicate that the downlink data has been sent.

27. The network side device according to claim 23, characterized in that: The sending the downlink signaling to the target RAN node includes: In the case that there are multiple downlink signaling messages, the multiple downlink signaling messages are combined and sent to the target RAN node.

28. The network side device according to claim 23, characterized in that: The first message also carries information of the target RAN node.

29. The network side device according to claim 23, characterized in that: The processor is further configured to perform the following operations: If the handover process fails to be executed or if the handover process is canceled, the downlink signaling is processed.

30. A network side device, characterized in that: The network side device, as a target RAN node, includes a memory, a transceiver, and a processor: Memory for storing computer programs; a transceiver, for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Upon receiving downlink signaling sent by a source RAN node corresponding to a handover procedure currently being executed, processing the downlink signaling; Sending a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes a processing result of the downlink signaling.

31. The network side device according to claim 30, characterized in that: The resource release message sent to the source RAN node during the handover process carries a signaling transmission identifier, and the signaling transmission identifier is used to instruct the source RAN node to transmit the received downlink signaling to the target RAN node.

32. The network side device according to claim 30, characterized in that: The sending a notification message to the NF node corresponding to the downlink signaling includes: In the case where the number of received downlink signalings is multiple, a notification message is sent to the NF node corresponding to the downlink signaling, and the notification message includes the processing results of the multiple downlink signalings.

33. The network side device according to claim 30, characterized in that: The processor is further configured to perform the following operations: Receive downlink signaling sent by the NF node.

34. A network side device, characterized in that: The network side device serves as an NF node, including a memory, a transceiver, and a processor: a memory for storing a computer program; a transceiver for transmitting and receiving data under the control of the processor; A processor is configured to read the computer program in the memory and perform the following operations: Sending downlink signaling to the source RAN node; If a first message returned by the source RAN node for the downlink signaling is received, wait for receiving a notification message for the downlink signaling; wherein the first message is used to indicate that the source RAN node is currently executing a switching process, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the switching process, the target RAN node is used to process the downlink signaling and send the notification message to the NF node, and the notification message includes the processing result of the downlink signaling.

35. The network side device according to claim 34, characterized in that: The first message also carries information of the target RAN node.

36. The network side device according to claim 35, characterized in that: The processor is further configured to perform the following operations: The downlink signaling is sent to the target RAN node.

37. The network side device according to claim 35, characterized in that: The processor is further configured to perform the following operations: starting a timer upon receiving the first message; If the notification message is not received within the preset duration corresponding to the timer, determining a current RAN node of the service terminal; wherein the current RAN node is the source RAN node or the target RAN node; Sending the downlink signaling to the current RAN node.

38. The network side device according to claim 37, characterized in that: The processor is further configured to perform the following operations: If the notification message is received within the preset duration corresponding to the timer, the timer is stopped.

39. The network side device according to claim 37, characterized in that: The number of the downlink signaling is multiple, and starting the timer when the first message is received includes: For each first message corresponding to the downlink signaling, a timer corresponding to the first message is started when the first message is received.

40. The network side device according to claim 39, characterized in that: The processor is further configured to perform the following operations: For each of the timers, if a notification message corresponding to the timer is received within a preset duration corresponding to the timer, the timer is stopped.

41. The network side device according to claim 37, characterized in that: The number of the downlink signaling is multiple, and starting the timer when the first message is received includes: The timer is started when a first message corresponding to the first downlink signaling is received.

42. The network side device according to claim 41, characterized in that: The processor is further configured to perform the following operations: If a notification message corresponding to each downlink signaling is received within a preset time period corresponding to the timer, the timer is stopped.

43. The network side device according to any one of claims 39 to 42, characterized in that: The sending the downlink signaling to the current RAN node includes: Sending a plurality of target downlink signalings in the downlink signaling to the current RAN node; wherein the NF node does not receive a notification message corresponding to the target downlink signaling within a preset duration corresponding to a target timer, and the target timer is a timer corresponding to the target downlink signaling.

44. The network side device according to claim 34, characterized in that: There are multiple downlink signaling messages, and the multiple downlink signaling messages share one notification message.

45. A downlink signaling processing device, characterized in that: Applied to the source RAN node, including: A first message returning unit is configured to return a first message to a network function NF node and retain the downlink signaling if downlink signaling is received from the network function NF node during the process of executing the handover process for the target RAN node; wherein the first message is used to indicate that the source RAN node is currently executing the handover process; A downlink signaling sending unit is used to send the downlink signaling to the target RAN node; wherein the target RAN node is used to process the downlink signaling and send a notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

46. ​​A downlink signaling processing device, characterized in that: Applied to target RAN nodes, including: A downlink signaling processing unit, configured to process the downlink signaling upon receiving downlink signaling sent by a source RAN node corresponding to a handover process currently being executed; A notification message sending unit is used to send a notification message to the NF node corresponding to the downlink signaling; wherein the downlink signaling is sent by the NF node to the source RAN node, and the notification message includes a processing result of the downlink signaling.

47. A downlink signaling processing device, characterized in that: Applied to NF nodes, including: A downlink signaling sending unit, configured to send downlink signaling to a source RAN node; a notification message receiving unit, configured to wait for receiving a notification message for the downlink signaling if a first message returned by the source RAN node for the downlink signaling is received; wherein the first message is used to indicate that the source RAN node is currently executing a handover procedure, and the downlink signaling is sent by the source RAN node to a target RAN node corresponding to the handover procedure, the target RAN node is used to process the downlink signaling and send the notification message to the NF node, wherein the notification message includes a processing result of the downlink signaling.

48. 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 method according to any one of claims 1 to 7, or the method according to any one of claims 8 to 18, or the method according to any one of claims 19 to 22.

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