Node Selection Method, Electronic Device, and Storage Medium

Abstract

The present application discloses a node selection method, an electronic device, and a storage medium. The method includes: the first network access node selects a second network access node according to the historical second network access node information; wherein, the historical second network access node information includes the node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access nodes are second network access nodes that have successfully established a second network connection with the UE. Based on the embodiments of the present application, when the UE accesses the second network, there is no need to perform cell signal quality measurement and reporting operations, which improves the efficiency of the first network access node in selecting the second network access node, and thus saves the time spent by the UE in accessing the second network.

Description

Technical Field

[0001] This application relates to the field of communications, and in particular, to a method for selecting a node, an electronic device, and a storage medium. Background Art

[0002] Currently, under the non-standalone (NSA) networking architecture adopted in 5G network deployment, the control plane (CP) of the 5G New Radio (NR) network is anchored to the 4G Long-Term Evolution (LTE) network. When a user equipment (UE) desires to transmit data traffic through the 5G network, it is necessary to first establish a 4G network connection with an LTE node, then perform NR measurements, report the measured NR cell signal strength, quality, etc. to the LTE node, and then the LTE node selects an NR node based on the measurement report, and further allocates 5G radio resources for the UE. In this way, the UE can use the 5G network for data transmission.

[0003] When the 5G radio resources are released and the UE desires to access the 5G network again, it is necessary to repeat the above NR measurement and reporting operations to re-select the NR node. This process is relatively cumbersome, redundant, and time-consuming. Summary of the Invention

[0004] The following is an overview of the subject matter described in detail in this document. This overview is not intended to limit the scope of protection of the claims.

[0005] On the one hand, embodiments of this application provide a method for selecting a node, an electronic device, and an electronic device storage medium, which can reduce the time taken for the UE to access the 5G network.

[0006] On the other hand, embodiments of this application provide a method for selecting a node, which is applied to a user equipment (UE) under non-standalone NSA networking. The method includes:

[0007] Sending historical second network access node information to a first network access node, so that the first network access node selects a second network access node according to the historical second network access node information;

[0008] Wherein, the historical second network access node information includes the node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access node is a second network access node that has successfully established a second network connection with the UE.

[0009] On the other hand, embodiments of this application provide a method for selecting a node, which is applied to a first network access node under non-standalone NSA networking. The method includes:

[0010] Obtain historical second network access node information, where the historical second network access node information includes node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access nodes are second network access nodes that have successfully established a second network connection with a user equipment UE;

[0011] Select a second network access node according to the historical second network access node information, and cause the UE currently to be connected to the second network to establish a second network connection with the selected second network access node.

[0012] On the other hand, an embodiment of the present application provides an electronic device, including:

[0013] A memory for storing programs;

[0014] A processor for executing the programs stored in the memory. When the processor executes the programs stored in the memory, the processor is used to execute the node selection method as described above.

[0015] On yet another aspect, an embodiment of the present application provides a storage medium storing computer-executable instructions for executing the above-mentioned node selection method.

[0016] An embodiment of the present application includes: the first network access node selects a second network access node according to the historical second network access node information; where the historical second network access node information includes node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access nodes are second network access nodes that have successfully established a second network connection with the UE. Based on the embodiment of the present application, when the UE accesses the second network, there is no need to perform cell signal quality measurement and reporting work, which improves the efficiency of the first network access node in selecting the second network access node, and thus saves the time spent by the UE in accessing the second network.

[0017] Other features and advantages of the present application will be described in the subsequent specification, and, in part, will be obvious from the specification, or will be understood by implementing the present application. The objectives and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the specification, the claims, and the drawings. Description of the Drawings

[0018] The drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation to the technical solution of the present application.

[0019] Figure 1It is a flowchart of a node selection method provided by an embodiment of the present application;

[0020] Figure 2 It is a flowchart of sending historical second network access node information to a first network access node provided by an embodiment of the present application;

[0021] Figure 3 It is a flowchart of another node selection method provided by an embodiment of the present application;

[0022] Figure 4 It is a flowchart of another node selection method provided by an embodiment of the present application;

[0023] Figure 5 It is a flowchart of obtaining historical second network access node information provided by an embodiment of the present application;

[0024] Figure 6 It is a flowchart of selecting a second network access node according to historical second network access node information provided by an embodiment of the present application;

[0025] Figure 7 It is a structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be understood that in the description of the embodiments of the present application, the meaning of multiple (or plural) is more than two, and understandings such as greater than, less than, exceeding, etc. do not include the number itself, and understandings such as above, below, within, etc. include the number itself. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0028] Under the NSA networking architecture adopted in the early stage of 5G network deployment, the core network is the Evolved Packet Core (EPC) or the new generation core (NGC) / 5G core (5GC). The evolved node B (eNB) that provides LTE access service serves as the master node and can establish control plane and user plane connections with the core network for the UE. The next generation NodeB (gNB) in 5G that provides NR access service serves as the secondary node and can only establish user plane connections with the core network for the user equipment. This means that the control plane of the 5G network is anchored to the 4G network. Based on this, under NSA networking, the steps for the UE to access the 5G network are roughly as follows:

[0029] S1. The UE establishes a 4G network connection with the LTE node;

[0030] S2. The LTE node configures the UE to measure NR signals;

[0031] S3. The UE measures NR signals according to the configuration and sends a measurement report to the LTE node;

[0032] S4. The LTE node selects an NR node according to the measurement report and sends a request for providing access resources to the corresponding NR node;

[0033] S5. The NR node replies with access resource configuration to the LTE node;

[0034] S6. The LTE node sends the access resource configuration to the UE;

[0035] S7. The UE uses the access resource configuration to establish a 5G network connection with the NR node.

[0036] When the 5G radio resources are released and the UE wants to access the 5G network again, it needs to repeat the above NR measurement and reporting work to re-select the NR node. This process is rather cumbersome, redundant, and time-consuming.

[0037] The embodiments of the present application provide a node selection method, an electronic device, and a storage medium, which can reduce the time taken for the UE to access the 5G network.

[0038] Figure 1 The flowchart of a node selection method provided by the embodiments of the present application is shown. This method is applied to the user equipment UE under non-standalone NSA networking, as Figure 1 shown, this method includes the following steps:

[0039] S110. Send historical second network access node information to the first network access node, so that the first network access node selects a second network access node according to the historical second network access node information.

[0040] Among them, the historical second network access node information includes the node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access node is a second network access node that has successfully established a second network connection with the UE.

[0041] It should be understood that the first network access node and the second network access node in the embodiments of the present application are nodes of two different systems. Specifically, the first network access node may be a base station with an access system of LTE; the second network access node may be a base station with an access system of NR.

[0042] Exemplarily, as Figure 2 shown, sending the historical second network access node information to the first network access node may specifically include the following steps:

[0043] S111. Establish a first network connection with the first network access node;

[0044] S112. Obtain historical second network access node information matching the first network access node;

[0045] S113. Send the historical second network access node information to the first network access node through the first network connection.

[0046] Specifically, the UE first establishes a first network connection with the first network access node, and under normal circumstances, camps on the cell covered by the first network access node and maintains a first network connection with the first network access node. When the UE desires to access the second network, it obtains the historical second network access node information matching the first network access node to which it is connected, and sends the historical second network access node information to the first network access node, so that the first network access node selects a second network access node from multiple historical second network access nodes within its coverage area, and then the selected second network access node provides second network resources for the UE.

[0047] Optionally, the historical second network access node information may be stored in the UE. In specific implementation, a historical second network access node list may be constructed in the UE, and the node identifiers of the historical second network access nodes are recorded through the historical second network access node list. It should be noted that the historical second network access node information may also be stored in a cloud server or other memories, and the present application does not make too many limitations on this.

[0048] Optionally, the historical second network access node information may further include: the historical connection success times corresponding to the node identifier. Here, the historical connection success times represent the number of times the historical second network access node has successfully established a second network connection with this UE. In specific implementation, in the above historical second network access node information list, for the node identifiers corresponding to each historical second network access node, the historical connection success times can be recorded.

[0049] When the historical second network access node information includes the historical connection success times corresponding to the node identifier, the first network access node selects the second network access node according to the historical second network access node information, which may include: determining the connection priority of the historical second network access node according to the historical connection success times; and selecting the second network access node from the N historical second network access nodes according to the connection priority. For example, if the historical second network access node information contains three nodes, NR1, NR2, and NR3, and the corresponding historical connection success times are 3, 1, and 2, then the above three nodes are sorted in descending order of connection priority as: NR1, NR3, NR2; the first network access node selects the NR1 node with the highest connection priority according to the connection priority to provide the second network resource for the UE.

[0050] Optionally, the above N historical second network access nodes may be N second network access nodes that have successfully established a second network connection with this UE within a preset time period. Generally speaking, when a user moves to a cell covered by a certain second network access node, the user will stay in the cell for a period of time. Therefore, in order to improve the success rate of the second network access node selected by the first network access node to establish a second network connection with the UE currently waiting to access the second network, the preset time period can be set to one day ago, one week ago, etc., and only the N second network access nodes that have successfully established a second network connection with this UE within the preset time period from now are included in the historical second network access node list. Of course, it can also be set to an unlimited time range, that is, within an unlimited time range, the N second network access nodes that have most recently successfully established a second network connection with this UE are included in the historical second network access node list. In specific implementation, the specific number of N can be set, for example, set N to be equal to 3.

[0051] As Figure 3 shown, optionally, the method of this embodiment further includes the following steps:

[0052] S120, establish a second network connection with the selected second network access node. When the second network connection fails to be established, feedback the connection failure information to the first network access node, so that the first network access node reselects the second network access node according to the historical second network access node information.

[0053] Exemplarily, after the first network access node selects the second network access node, it sends the access configuration of the selected second network access node to the UE, so that the UE establishes a second network connection with the selected second network access node. If the establishment of the second network connection fails, the UE feeds back the connection failure information to the first network access node, so that the first network access node re-selects the second network access node according to the historical second network access node information.

[0054] Exemplarily, when the first network access node re-selects the second network access node according to the historical second network access node information, it can select the second network access node with the second highest connection priority ranking in the above historical second network access node list as the new node, and make the UE establish a second network connection with the newly selected second network access node.

[0055] Figure 4 The flowchart of a node selection method provided by an embodiment of the present application is shown. This method is applied to the first network access node in a non-standalone NSA network, such as Figure 4 As shown, the method includes the following steps:

[0056] S210, obtain the historical second network access node information;

[0057] S220, select the second network access node according to the historical second network access node information, and make the UE currently waiting to access the second network establish a second network connection with the selected second network access node.

[0058] Among them, the historical second network access node information includes the node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the historical second network access node is the second network access node that has successfully established a second network connection with the user equipment UE.

[0059] Such as Figure 5 As shown, in a possible implementation manner, the historical second network access node information can be stored in the UE currently waiting to access the second network. Based on this, in step S210, obtaining the historical second network access node information may include, but is not limited to, the following sub-steps:

[0060] S211, establish a first network connection with the UE currently waiting to access the second network;

[0061] S212, through the first network connection, receive the historical second network access node information sent by the UE currently waiting to access the second network.

[0062] Exemplarily, the first network access node receives historical second network access node information from a UE currently to be connected to a second network. The historical second network access node information includes the node identifiers of N historical second network access nodes. Here, the historical second network access nodes represent the second network access nodes that have successfully established a second network connection with the UE currently to be connected to the second network.

[0063] Optionally, the historical second network access node information received by the first network access node from the UE currently to be connected to the second network may further include: the historical connection success times corresponding to the node identifiers. Here, the historical connection success times represent the number of times that the historical second network access nodes have successfully established a second network connection with the UE currently to be connected to the second network.

[0064] In another possible implementation, the historical second network access node information may be stored in the first network access node. Based on this, in step S210, obtaining the historical second network access node information includes: the first network access node obtaining the historical second network access node information from local.

[0065] Exemplarily, the historical second network access node information obtained by the first network access node from local includes the node identifiers of N historical second network access nodes.

[0066] Exemplarily, the historical second network access nodes are the second network access nodes that have successfully established a second network connection with the UE. Here, the UE may refer to different UEs and is not limited to the UE currently to be connected to the second network. In addition, in this embodiment, the historical second network access node information may further include: the historical connection success times corresponding to the node identifiers. Here, the historical connection success times represent the number of times that the historical second network access nodes have successfully established a second network connection with the UE, and the UE here may also refer to different UEs and is not limited to the UE currently to be connected to the second network.

[0067] Optionally, the historical second network access nodes may be the second network access nodes that have successfully established a second network connection with the UE currently to be connected to the second network, that is, only the second network access nodes that have successfully established a second network connection with the UE currently to be connected to the second network are taken as the historical second network access nodes for the first network access node to select.

[0068] Optionally, the above N historical second network access nodes may be N second network access nodes that have successfully established a second network connection with the UE or the UE currently to be connected to the second network within a preset time period. For example, in order to improve the success rate of establishing a second network connection between the second network access node selected by the first network access node and the UE currently to be connected to the second network, the preset time period may be set to one day ago, one week ago, etc. from now. Of course, it can also be set to an unlimited time range, that is, within an unlimited time range, the N second network access nodes that have most recently successfully established a second network connection with the UE or the UE currently to be connected to the second network are used as the historical second network access nodes. When specifically implemented, the specific number of N is set, for example, N is set to 3.

[0069] As Figure 6 shown, when the historical second network access node information includes the historical connection success times, in step S220, selecting a second network access node according to the historical second network access node information may include, but is not limited to, the following sub-steps:

[0070] S221, determining the connection priority of the historical second network access nodes according to the historical connection success times;

[0071] S222, selecting a second network access node from the N historical second network access nodes according to the connection priority.

[0072] For example, among the second network access node information obtained by the first network access node, there are three nodes, NR1, NR2, and NR3, and the corresponding historical connection success times are 3, 1, and 2. Then, the above three nodes are sorted in descending order of connection priority as: NR1, NR3, NR2; the first network access node selects the NR1 node with the highest connection priority according to the connection priority to provide second network resources for the UE.

[0073] When the first network access node receives the connection failure information fed back by the UE currently to be connected to the second network, it re-selects a second network access node according to the historical second network access node information. For example, it selects the NR3 node with the second highest connection priority to provide second network resources for the UE.

[0074] The following further introduces the node selection method provided by the embodiments of the present application through specific examples.

[0075] Example 1:

[0076] The UE stores a list of historical second network access nodes for recording the historical second network access nodes that have successfully established a second network connection with itself.

[0077] Table 1 is the list of historical second network access nodes stored in the UE

[0078] First network access node Historical second network access node Historical connection success times LTE1 NR1 3 LTE1 NR2 1 LTE1 NR3 2 LTE2 NR4 3 LTE2 NR5 1

[0079] Exemplarily, the steps for the UE to access the second network (i.e., the 5G network) include:

[0080] S11. The UE establishes a first network connection with the first network access node (assumed to be LTE1), and here the first network connection is a 4G network connection;

[0081] S12. When the UE needs to access the second network (i.e., the 5G network), it obtains the historical second network access node information matching the LTE1 node and sends it to the LTE1 node. Here, the historical second network access node information matching the LTE1 node includes three node identifiers, NR1, NR2, and NR3, and the historical connection success times corresponding to the node identifiers of NR1, NR2, and NR3 are 3, 1, and 2;

[0082] S13. The LTE1 node selects a second network access node according to the historical second network access node information from the UE. Specifically, it can determine the connection priorities of NR1, NR2, and NR3 according to the historical connection success times. For example, the connection priority ranking here is NR1, NR3, NR2. Then, it selects NR1 as the second network access node according to the connection priority and sends a request for providing access resources to the NR1 node;

[0083] S14. The NR1 node replies with the access resource configuration to the LTE1 node;

[0084] S15. The LTE1 node sends the access resource configuration to the UE;

[0085] S16. The UE uses the access resource configuration to establish a 5G network connection with the NR1 node.

[0086] Example 2:

[0087] The LTE node stores a historical second network access node list for recording the UEs that have established a first network connection with itself and the corresponding historical second network access nodes. Here, the historical second network access nodes are the NR nodes that have recently successfully established a 5G network connection with the corresponding UEs through this LTE node.

[0088] Table 2 is the historical second network access node list stored in the LTE node

[0089] UE Historical second network access node UE1 NR1, NR3 UE2 NR2, NR4 UE3 NR1, NR2

[0090] Exemplarily, the steps for UE1 to access the 5G network include:

[0091] S21. UE1 establishes a 4G network connection with the LTE node;

[0092] When the LTE node receives a request from UE1 to access the 5G network, it obtains historical secondary network access node information (i.e., NR1, NR3) that matches the UE1 node.

[0093]

[0092] The LTE node selects a secondary network access node based on the obtained historical secondary network access node information, that is, selects one of NR1 and NR3. Assuming NR1 is selected as the secondary network access node, it sends a request for providing access resources to the NR1 node.

[0094] The NR1 node replies with the access resource configuration to the LTE node.

[0095]

[0093] The LTE node sends the access resource configuration to UE1.

[0096] UE1 uses the access resource configuration to establish a 5G network connection with the NR1 node.

[0097] Example 3:

[0098]

[0094] The LTE node stores a list of historical secondary network access nodes for recording historical secondary network access nodes and their corresponding historical connection success counts. Here, the historical secondary network access nodes are NR nodes that have recently successfully established a 5G network connection with a UE (not limited to one UE) through this LTE node.

[0099] Table 3 shows the list of historical secondary network access nodes stored in the LTE node.

[0100] Historical second network access node Historical connection success times NR1 3 NR2 1 NR3 2

[0101]

[0095] Exemplarily, the steps for a UE to access the 5G network include:

[0102] S31: The UE establishes a 4G network connection with the LTE node.

[0103]

[0096] S32: When the LTE node receives a request from the UE to access the 5G network, it obtains the historical secondary network access node information.

[0104] S33: Select a secondary network access node based on the obtained historical secondary network access node information, that is, select one of NR1, NR2, and NR3. Specifically, the connection priority of the NR nodes can be determined according to the historical connection success counts. For example, the connection priority ranking here is NR1, NR3, NR2. Then, select NR1 as the secondary network access node according to the connection priority and send a request for providing access resources to the NR1 node.

[0105]

[0097] S34: The NR1 node replies with the access resource configuration to the LTE node.

[0106] S35. The LTE node sends the access resource configuration to the UE;

[0107] S36. The UE uses the access resource configuration to establish a 5G network connection with the NR1 node.

[0108] Compared with the prior art, the node selection method provided by the embodiments of the present application has the following advantages:

[0109] By applying the technical solution of the embodiments of the present application, the first network access node selects the second network access node according to the historical second network access node information, without waiting for the UE's cell signal quality measurement and reporting operations, effectively improving the efficiency of the first network access node in selecting the second network access node, and thus saving the time spent by the UE in accessing the second network.

[0110] Figure 7 FIG. shows the electronic device 300 provided by the embodiments of the present application. As Figure 7 shown, the electronic device 300 includes but is not limited to:

[0111] A memory 320 for storing programs;

[0112] A processor 310 for executing the programs stored in the memory 320. When the processor 310 executes the programs stored in the memory 320, the processor 310 is used to execute the above-mentioned node selection method.

[0113] The processor 310 and the memory 320 can be connected by a bus or other means.

[0114] The memory 320, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs, such as the node selection method described in the embodiments of the present application. The processor 310 realizes the above-mentioned node selection method by running the non-transitory software programs and instructions stored in the memory 320.

[0115] The memory 320 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store the execution of the above-mentioned node selection method. In addition, the memory 320 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 320 may optionally include a memory remotely provided with respect to the processor 310, and these remote memories can be connected to the processor 310 through a network. Examples of the above-mentioned network include but are not limited to the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0116] The non-transitory software program and instructions required to implement the above node selection method are stored in the memory 320. When executed by one or more processors 310, the above node selection method is executed. For example, execute Figure 1 the method step S110 described in Figure 2 the method steps S111 to S113 described in Figure 3 the method steps S110 and S120 described in Figure 4 the method steps S210 and S220 described in Figure 5 the method steps S211 to S212 described in Figure 6 the method steps S221 to S222 described in

[0117] The embodiment of the present application also provides a storage medium storing computer-executable instructions for executing the above node selection method.

[0118] In one embodiment, the storage medium stores computer-executable instructions that are executed by one or more control processors 310. For example, when executed by one of the processors 310 in the above electronic device 300, the one or more processors 310 can be caused to execute the above node selection method. For example, execute Figure 1 the method step S110 described in Figure 2 the method steps S111 to S113 described in Figure 3 the method steps S110 and S120 described in Figure 4 the method steps S210 and S220 described in Figure 5 the method steps S211 to S212 described in Figure 6 the method steps S221 to S222 described in

[0119] The embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0120] Those of ordinary skill in the art will understand that all or some of the steps and systems disclosed in the above methods can be implemented as software, firmware, hardware, and their appropriate combinations. Some physical components or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include a computer storage medium (or non-transitory medium) and a communication medium (or transitory medium). As is well known to those of ordinary skill in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information, such as computer-readable instructions, data structures, program modules, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVDs) or other optical disk storage, magnetic cassettes, tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, as is well known to those of ordinary skill in the art, communication media typically includes computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transmission mechanism, and can include any information delivery medium.

[0121] The above is a specific description of the preferred embodiments of the present application. However, the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present application, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A node selection method, which is applied to a user equipment (UE) in a non-standalone NSA network. The method includes: Sending historical second network access node information to a first network access node, so that the first network access node selects a second network access node according to the historical second network access node information; Wherein, the historical second network access node information includes node identifiers of N historical second network access nodes that match the first network access node, N is an integer greater than or equal to 1, and the N historical second network access nodes are the N second network access nodes that have most recently successfully established a second network connection with this UE.

2. The method according to claim 1, characterized in that, The sending the historical second network access node information to the first network access node includes: Establishing a first network connection with the first network access node; Sending the historical second network access node information to the first network access node through the first network connection.

3. The method according to claim 1, wherein The historical second network access node information further includes: historical connection success times corresponding to the node identifiers.

4. The method according to claim 1, wherein The method further includes: Establishing a second network connection with the selected second network access node. When the establishment of the second network connection fails, feedbacking connection failure information to the first network access node, so that the first network access node re-selects a second network access node according to the historical second network access node information.

5. The method according to any one of claims 1 to 4, characterized in that The historical second network access node information is stored in the UE.

6. A node selection method, which is applied to a first network access node in a non-standalone NSA network. The method includes: Obtaining historical second network access node information that matches this first network access node. Wherein, the historical second network access node information includes node identifiers of N historical second network access nodes, N is an integer greater than or equal to 1, and the N historical second network access nodes are the N second network access nodes that have most recently successfully established a second network connection with a user equipment (UE) or a UE currently to be connected to a second network; Selecting a second network access node according to the historical second network access node information, so that the UE currently to be connected to the second network establishes a second network connection with the selected second network access node.

7. The method according to claim 6, wherein The historical second network access node information further includes: historical connection success times corresponding to the node identifiers; Correspondingly, the selecting the second network access node according to the historical second network access node information includes: Determining the connection priority of the historical second network access node according to the historical connection success times; Selecting a second network access node from the N historical second network access nodes according to the connection priority.

8. The method according to claim 6 or 7, characterized in that, The method further includes: When receiving the connection failure information feedback by the UE currently to be connected to the second network, re-selecting a second network access node according to the historical second network access node information.

9. The method according to claim 6 or 7, characterized in that, The historical second network access node information is stored in the UE currently to be connected to the second network; Correspondingly, the obtaining the historical second network access node information includes: Establishing a first network connection with the UE currently to be connected to the second network; Receive, via the first network connection, historical second network access node information sent by the UE currently to be connected to the second network.

10. The method according to claim 6 or 7, wherein the historical second network access node information is stored in the first network access node; Correspondingly, the obtaining of the historical second network access node information includes: the first network access node obtains the historical second network access node information from local.

11. An electronic device, characterized in that, including: a memory for storing a program; a processor for executing the program stored in the memory, and when the processor executes the program stored in the memory, the processor is configured to execute: the method according to any one of claims 1 to 10.

12. A storage medium, characterized in that, storing computer-executable instructions for executing: the method according to any one of claims 1 to 10.

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