CN117354880A - Handover methods and equipment, core network equipment, terminals, computer equipment and media - Google Patents

Abstract

The invention discloses a switching method and device, core network equipment, a terminal, computer equipment and a medium, and relates to the technical field of base communication. The switching method is applied to the source base station and comprises the following steps: first response information is received from the first base station. A second set is obtained from the terminal. And determining a target base station in the adjacent base stations of the source base station according to the first set and the second set. And switching the terminal to the target base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The terminal is a terminal corresponding to the first handover request. When the terminal is in RRC_CONNECTED state and the source base station sends a switching request to the target base station, the target base station is selected from two aspects of user service requirement and wireless resource in view of the slicing condition of the PDU session of the terminal according to the measurement report of the terminal to the target base station and the wireless resource management information, so as to provide better network service for the user as much as possible.

Description

Handover methods and equipment, core network equipment, terminals, computer equipment and media

Technical field

The present invention relates to the field of communication technology, and in particular to a switching method and equipment, core network equipment, terminals, computer equipment and media.

Background technique

When the terminal is in the radio resource control connection mode RRC_CONNECTED state, if the terminal is about to exceed the coverage of the source base station due to movement, that is, the source base station is about to be unable to continue to provide services to the terminal, the terminal needs to be switched from the source base station to the target base station. . During the mobility process of the control plane in related technologies, the source base station needs to configure the measurement process of the terminal so that the terminal performs wireless signal measurements on adjacent base stations of the source base station according to the measurement configuration and sends a measurement report to the source base station, so that the source base station can The target base station is determined from neighboring base stations based on the measurement report and radio resource management information. After determining the target base station, the source base station sends a handover request to the target base station. The handover request carries information related to the protocol data unit (PDU) session. The PDU session information includes fragmentation information, QoS (Quality of Service, Quality of Service) flow level, and QoS configuration information. After receiving the handover request, the target base station performs an access control check on the terminal and sends a handover request response to the source base station. After receiving the handover request response, the source base station instructs the terminal to switch to the target base station through radio resource control RRC signaling. The terminal receives the instruction to complete time-frequency synchronization with the target base station, and sends RRC signaling to the target base station to complete the handover.

It can be seen that the source base station does not consider the fragmentation of the terminal PDU session when determining the target base station. That is to say, if the target base station does not support a certain piece of fragmentation information ordered by the terminal, the target base station will refuse to provide services for the PDU session corresponding to a certain piece of fragmentation information that the target base station does not support. At this time, if the terminal switches to the target base station, the PDU session corresponding to a piece of fragmentation information not supported by the target base station is interrupted because it is not supported by the target base station. If the source base station retains the PDU session corresponding to a piece of fragmentation information that the target base station does not support on the source base station side, as the terminal moves beyond the coverage of the source base station, it will also cause a piece of information that the target base station does not support. The PDU session corresponding to the fragmentation information is interrupted, thus affecting the user experience.

Contents of the invention

The technical problem to be solved by the present invention is: during the movement of the terminal, if a base station switching occurs, when the target base station does not support a certain fragmentation information, it may result in a certain fragmentation information that the target base station does not support. The PDU session is interrupted, resulting in a decrease in user experience.

In view of the above-mentioned shortcomings of the existing technology, the following solutions are provided:

In a first aspect, the present invention provides a handover method, which is applied to a source base station. The method includes: receiving first response information from the first base station. Get the second collection. The target base station is determined among adjacent base stations of the source base station according to the first set and the second set. and, switching the terminal to the target base station. Wherein, the first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal. The important session is a session corresponding to an important service determined based on the service subscription relationship, and/or a session corresponding to an application currently in the foreground of the terminal.

Optionally, obtaining the second set includes: querying whether the corresponding relationship between important services and sessions determined based on the ordering relationship is stored locally, and if so, obtaining the important session identifier based on the corresponding relationship between important services and sessions determined based on the ordering relationship. According to the important session identifier, the important sessions in the PDU sessions currently established by the terminal are determined, and the information of the fragments corresponding to the important sessions in the PDU sessions currently established by the terminal is obtained. And, generating a second set based on the information of the fragments corresponding to the important session among the fragments corresponding to the PDU session currently established by the terminal.

Optionally, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the ordering relationship. Then, the corresponding relationship between important services and sessions determined based on the ordering relationship stored locally by the source base station is sent to the source base station by the core network device in response to detecting that the terminal has subscribed to the important service and accessed the source base station.

Optionally, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the ordering relationship. Then, the correspondence between important services and sessions determined based on the ordering relationship and stored locally by the source base station is sent by the second base station to the source base station. The second base station is the base station that switches the terminal to the source base station.

Optionally, obtaining the second set includes: querying the core network device for the correspondence between important services and sessions determined based on the ordering relationship, so as to obtain the important session identifier. According to the important session identifier, the important sessions in the PDU sessions currently established by the terminal are determined, and the information of the fragments corresponding to the important sessions in the PDU sessions currently established by the terminal is obtained. And, generating a second set based on the information of the fragments corresponding to the important session among the fragments corresponding to the PDU session currently established by the terminal.

Optionally, obtaining the second set includes: querying the terminal for a session identifier corresponding to the application currently in the foreground. According to the session identifier corresponding to the application currently in the foreground, obtain the information of the shard corresponding to the session corresponding to the application currently in the foreground. And, generating a second set based on the information of the shards corresponding to the session corresponding to the application currently in the foreground.

Optionally, determining the target base station among adjacent base stations of the source base station according to the first set and the second set includes: determining whether the first set and the second set include the same fragments. If so, the base station is reselected among the neighboring base stations of the source base station according to the second set to determine the target base station. If not, the first base station is determined to be the target base station.

Optionally, reselecting a base station among neighboring base stations of the source base station according to the second set to determine the target base station includes: respectively sending the second set to each base station in at least one other neighboring base station of the source base station. A third set of respective base stations from at least one other neighboring base station of the source base station is received respectively. and determining whether there is at least one third base station in at least one other neighbor base station of the source base station based on a third set of respective base stations from the at least one other neighbor base station of the source base station. If present, the target base station is determined among at least one third base station and the first base station. If it does not exist, the first base station is determined to be the target base station. The base station that sends the third set that is not an empty set is the third base station. Wherein, at least one other neighboring base station of the source base station is at least one base station other than the first base station among the neighboring base stations of the source base station. The third set of base stations from the source base station's at least one other neighbor base station is returned by each of the source base station's at least one other neighbor base station based on its own support for one or more shards in the second set. A set consisting of one or more shards in the second set supported by itself. Or the set is an empty set returned by each base station in at least one other neighboring base station of the source base station based on the fact that it does not support any fragment in the second set.

Optionally, determining the target base station in the at least one third base station and the first base station includes: calculating the target base station in the at least one third base station according to the importance of fragments in the third set of each third base station in the at least one third base station. The weighted value of each third base station. Obtain the fourth set, and calculate the weighted value of the first base station according to the importance of the fragments in the fourth set. Issue a second measurement instruction to the terminal. And, determine the target base station among the first base station and the at least one third base station according to the first measurement result, the weighting value of the first base station, the second measurement result, and the weighting value of each of the at least one third base station. Among them, the fourth set is the difference set between the second set and the first set. The second measurement instruction is used to instruct the terminal to perform wireless signal measurement on each of the at least one third base station and send the second measurement result to the source base station. The target base station is the base station with the largest weight value among the first base station and at least one third base station whose measurement results meet the handover conditions. The first measurement result is a measurement result from the terminal that the source base station instructs the terminal to measure adjacent base stations of the source base station before receiving the first response information from the first base station. If there are multiple base stations with the largest weighted values and the same weighted values among the first base station and at least one third base station whose measurement results meet the handover conditions, the target base station is the wireless signal quality among multiple base stations with the largest weighted values and the same weighted values. Best base station.

Optionally, switching the terminal to the target base station includes: sending second handover request information to the target base station, so that the target base station performs access control check on the terminal. And, receive the handover request response information from the target base station, and send radio resource control RRC signaling to the terminal, so that the terminal completes time-frequency synchronization with the target base station and then sends RRC signaling to the target base station to complete the handover.

Optionally, the second handover request information includes indication information, and the indication information is used to instruct the target base station to ignore fragments that the target base station does not support and allow the terminal to access.

In a second aspect, the present invention provides a handover method, applied to core network equipment, including: receiving first query information from a source base station. And, sending the correspondence between important services and sessions determined according to the ordering relationship to the source base station, so that the source base station obtains the important session identifier based on the correspondence between important services and sessions determined according to the ordering relationship and obtains the second set according to the important session identifier. The first query information is used to query the core network device for the corresponding relationship between important services and sessions determined based on the ordering relationship. The first query information is sent by the source base station to the core network device after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal.

In a third aspect, the present invention provides a handover method, applied to a terminal, including: receiving second query request information from a source base station. and sending the session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station obtains the second set according to the session identifier corresponding to the application currently in the foreground. The second query request information is used to query the terminal for the session identifier corresponding to the application currently in the foreground. The second query request information is sent by the source base station to the terminal after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The second set includes fragments corresponding to the session corresponding to the application currently in the foreground of the terminal among the fragments corresponding to the PDU session currently established by the terminal.

In a fourth aspect, the present invention provides a switching device, including a first response information receiving module, a second set obtaining module, a target base station determining module and a switching module. The first response information receiving module is configured to: receive the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The second set acquisition module is set to: acquire the second set. The second set includes a set of fragments corresponding to important sessions in the information of fragments corresponding to the PDU session currently established by the terminal. The important session is a session corresponding to an important service determined based on the service subscription relationship, and/or a session corresponding to an application currently in the foreground of the terminal. The target base station determination module is configured to: determine the target base station among adjacent base stations of the source base station according to the first set and the second set. The switching module is set to: switch the terminal to the target base station.

In a fifth aspect, the present invention provides a core network device, including a first query request information receiving module and a corresponding relationship sending module. The first query request information receiving module is configured to: receive the first query information from the source base station. The first query information is used to query the core network device for the corresponding relationship between important services and sessions determined based on the ordering relationship. The first query information is sent by the source base station to the core network device after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The correspondence sending module is configured to: send to the source base station the correspondence between important services and sessions determined according to the ordering relationship, so that the source base station obtains the important session identifier based on the correspondence between important services and sessions determined according to the ordering relationship and obtains the important session identifier based on the important session. Identifies the second collection. The second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal.

In a sixth aspect, the present invention provides a terminal, including: a second query request information receiving module and a session identification sending module. The second query request information receiving module is configured to: receive the second query request information from the source base station. The second query request information is used to query the terminal for the session identifier corresponding to the application currently in the foreground. The second query request information is sent by the source base station to the terminal after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. The session identifier sending module is configured to: send the session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station obtains the second set according to the session identifier corresponding to the application currently in the foreground. The second set includes fragments corresponding to the session corresponding to the application currently in the foreground of the terminal among the fragments corresponding to the PDU session currently established by the terminal.

In a seventh aspect, the present invention provides a computer device, including a memory and a processor. A computer program is stored in the memory. When the processor runs the computer program stored in the memory, the processor executes the above switching method.

In an eighth aspect, the present invention provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the processor executes the above switching method.

The beneficial effects of the switching method and equipment, core network equipment, terminals, computer equipment and media provided by the present invention include: when the terminal is in the RRC_CONNECTED state and the source base station sends a handover request to the target base station, The measurement report and wireless resource management information of the base station also take into account the fragmentation of the terminal PDU session. The target base station is selected from the perspective of user business needs and wireless resources to provide users with a better network as much as possible. Serve.

Description of drawings

Figure 1 is a schematic diagram of an application scenario of a switching method in an embodiment of the present invention;

Figure 2 is a flow chart of a switching method in an embodiment of the present invention;

Figure 3 is a flow chart of another switching method in an embodiment of the present invention;

Figure 4 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 5 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 6 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 7 is a schematic diagram of a front-end application in an embodiment of the present invention;

Figure 8 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 9 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 10 is a flow chart of another switching method in an embodiment of the present invention;

Figure 11 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 12 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 13 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 14 is a flow chart of yet another switching method in an embodiment of the present invention;

Figure 15 is a structural diagram of a switching device in an embodiment of the present invention;

Figure 16 is a structural diagram of another switching device in an embodiment of the present invention;

Figure 17A is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 17B is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 17C is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 18 is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 19 is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 20 is a structural diagram of yet another switching device in an embodiment of the present invention;

Figure 21 is a structural diagram of a core network device in an embodiment of the present invention;

Figure 22 is a structural diagram of a terminal in an embodiment of the present invention;

Figure 23 is a structural diagram of another terminal in an embodiment of the present invention;

Figure 24 is a structural diagram of yet another terminal in an embodiment of the present invention;

Figure 25 is a structural diagram of a computer device in an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

It can be understood that the specific embodiments and drawings described here are only used to explain the present invention, but not to limit the present invention.

It can be understood that, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

It can be understood that, for convenience of description, only the parts related to the present invention are shown in the drawings of the present invention, and the parts irrelevant to the present invention are not shown in the drawings.

It can be understood that each unit and module involved in the embodiments of the present invention may correspond to only one entity structure, or may be composed of multiple entity structures, or multiple units and modules may be integrated into one entity structure.

It can be understood that, provided there is no conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in a sequence different from that marked in the drawings.

It can be understood that the flowcharts and block diagrams of the present invention illustrate the architecture, functions, and operations of the systems, devices, equipment, and methods that may be implemented according to various embodiments of the present invention. Each box in the flow chart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for realizing the specified function. Furthermore, each block or combination of blocks in the block diagrams and flowchart illustrations may be implemented by a hardware-based system that performs the specified functions, or by a combination of hardware and computer instructions.

It can be understood that the units and modules involved in the embodiments of the present invention can be implemented in software or hardware. For example, the units and modules can be located in a processor.

Some embodiments of the present invention provide a handover method, which can be applied in the scenario shown in Figure 1. As shown in Figure 1, the base station 10 is the base station that currently provides network services to the user's terminal 20. Base station 11, base station 12, and base station 13 are respectively adjacent to the coverage area of base station 10. That is, when the base station 10 is the source base station, the base station 11, the base station 12, and the base station 13 are respectively adjacent base stations of the source base station. As the user moves, the terminal 20 may move away from the base station 10 and enter the coverage area of the base station 11, or the base station 12, or the base station 13. During this process, a switching of the base station that provides network services to the terminal 20 will occur. .

It can be understood that in FIG. 1 , the terminal 20 can be any form of mobile intelligent device, such as a vehicle-mounted terminal or a smartphone. The embodiment of the present invention is not limited to the form of the terminal 20 .

Some embodiments of the present invention provide a handover method, which is applied to the source base station (base station 10). As shown in Figure 2, the method includes steps 201 to 204.

Step 201: Receive first response information from the first base station.

In step 201, the first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request.

In some embodiments, as shown in Figure 3, before step 201, the switching method may further include steps 205 to 207.

Step 205: Perform measurement configuration for the terminal and send the first measurement instruction to the terminal.

In step 205, the first measurement instruction is used to instruct the terminal to perform wireless signal measurement according to the measurement configuration and send the first measurement result to the source base station.

It can be understood that when the source base station performs measurement configuration for the terminal, it can specify that the terminal performs wireless signal measurement on a certain base station among adjacent base stations (such as the first base station). If the measurement result meets the handover requirements, the certain base station is determined to be the wireless signal. The target base station performs handover. If it does not match, another base station is designated to measure again. The source base station can also designate a terminal to measure multiple base stations among adjacent base stations, and determine a target base station among the multiple base stations based on the measurement results.

For example, as shown in Figure 1, the base station 10 recognizes that the terminal 20 is about to exceed the coverage of the base station 10 as the user moves, then the source base station can instruct the terminal 20 to contact the adjacent base stations of the source base station (for example, base station 11, One or more of the base stations 12, 13) perform wireless signal measurements.

Step 206: Receive the first measurement result from the terminal, and determine the first base station among adjacent base stations of the source base station based on the first measurement result and the radio resource management information.

For example, after the terminal 20 performs wireless signal measurements on the base station 11, the base station 12, and the base station 13 respectively, the terminal 20 sends the wireless signal measurement results of the base station 11, the base station 12, and the base station 13 to the adjacent base stations of the base station 10, that is, to the base station 10Send the first measurement result. After receiving the first measurement result, the base station 10 may select the base station with the best measurement result (ie, the best signal) from the first measurement result as the first base station. For example, if among the first measurement results, the wireless signal measurement result of the terminal on the base station 11 is the best, the first base station can be determined to be the base station 11 .

Step 207: Send first handover request information to the first base station, so that the first base station sends first response information to the source base station.

In step 207, the first switching request information includes information about the PDU session currently established by the terminal. The information about the PDU session currently established by the terminal includes information about the fragments corresponding to the PDU session currently established by the terminal, the quality of service QoS flow level corresponding to the PDU session currently established by the terminal, and the information corresponding to the PDU session currently established by the terminal. QoS configuration information. In this way, the first base station can receive the first handover request information from the source base station, and send the first response information according to the information about the fragments corresponding to the PDU session carried in the first handover request information.

For example, the base station 10 sends the first handover request information to the base station 11. After receiving the first handover request information, the base station 11 obtains the fragment information carried in the first handover request information corresponding to the PDU session currently established by the terminal. , and confirm whether there are fragments that are not supported by the base station 11. If there are fragments that are not supported by the base station 11, generate the information about the fragments that are carried in the first handover request information and correspond to the PDU session currently established by the terminal. Set, that is, the first set. Next, enter step 201. Reference may be made to the relevant description of step 201, which will not be described again here.

Step 202: Obtain the second set.

In step 202, the second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal. The important session is a session corresponding to an important service determined based on the service subscription relationship, and/or a session corresponding to an application currently in the foreground of the terminal.

In some embodiments, the important session is a session corresponding to the important service determined based on the service ordering relationship. The core network can proactively send the corresponding relationship between the important service and the session determined based on the ordering relationship to the source base station, so that the source base station obtains the important session identifier. , as shown in Figure 4, the implementation method of step 202 may include steps 2021 to 2023.

Step 2021: Query whether the corresponding relationship between important services and sessions determined according to the ordering relationship is stored locally. If so, obtain the important session identifier based on the corresponding relationship between important services and sessions determined according to the ordering relationship.

In some embodiments, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the subscription relationship. Then, the corresponding relationship between important services and sessions determined based on the ordering relationship stored locally by the source base station is sent to the source base station by the core network device in response to detecting that the terminal has subscribed to the important service and accessed the source base station.

For example, the core network device may be a device responsible for session management. For example, the core network device may be an SMF (Session Management Function). The SMF is responsible for the management of the PDU session currently established by the terminal. All session controls are Completed by SMF. Or for example, the core network device can be UDM (Unified Data Management, unified data management functional entity) or UDR (Unified Data Repository, unified data storage functional entity). UDM or UDR is responsible for storing business ordering relationship data. Some have UDM and some have UDR. They have different divisions of labor. Standardized business ordering relationship data is generally stored in UDM, and operator-defined business ordering relationship data is stored in UDR. SMF and UDM or UDR can cooperate to complete the above functions. For example, if the core network device is an SMF, the SMF can query the UDM or UDR for the ordering relationship, and then determine the PDU session currently established by the terminal based on the correspondence between important services and sessions determined based on the ordering relationship and the PDU session information currently established by the terminal. Important conversation. Or for example, if the core network device is UDM or UDR, then UDM or UDR queries SMF for session information when receiving a query request from the source base station to determine the corresponding relationship between important services and sessions based on the ordering relationship and the terminal currently established The PDU session information determines the important sessions of the PDU session currently established by the terminal.

Understandably, the core network equipment (UDM or UDR) responds to detecting that the terminal has subscribed to an important service. The important service may also refer to the functions referred to in steps 201 to 204 of the present invention, that is, when switching the base station, the base station will not be switched due to the target. The site does not support a certain fragment, causing important sessions to be terminated, or switching being refused. For example, the technical function corresponding to the method from step 201 to step 204 itself can be ordered by the terminal as an important service.

It can be understood that when providing network services for terminals according to the switching method in the present invention (for example, the methods in steps 201 to 204), the core network device can also automatically precalculate the terminals (all terminals or those who have activated steps 201 to 204). 204)'s important session list (based on the important business correspondence determined according to the service ordering relationship and the PDU session currently established by the terminal), and is delivered in real time to the base station currently providing services to the terminal (i.e., the source base station ), at this time, as the last step after the handover process is completed, the source base station can send the important session list to the target base station, so that when the target base station becomes the new source base station, it can continue to provide the same service to the terminal.

In some embodiments, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the subscription relationship. Then, the correspondence between important services and sessions determined based on the ordering relationship and stored locally by the source base station is sent by the second base station to the source base station. The second base station is the base station that switches the terminal to the source base station.

It can be understood that the correspondence between important services and sessions determined based on the ordering relationship that is stored locally on the source base station does not necessarily come directly from the core network equipment, but may also come from the base station that provides services to the terminal before switching to the source base station ( For example, the second base station). In this way, the core network equipment does not need to care about which base station the terminal is currently moving to. When connecting to the network for the first time, it only needs to deliver the correspondence between important services and sessions determined based on the ordering relationship to the base station where the terminal first accesses. In other words, the correspondence between important services and sessions determined based on the subscription relationship will be transferred between base stations as the terminal switches between base stations, and the context of the terminal status will be transferred between base stations, thereby reducing the burden on core network equipment.

Step 2022: Determine important sessions in the PDU sessions currently established by the terminal according to the important session identifiers, and obtain information about fragments corresponding to the important sessions in the PDU sessions currently established by the terminal.

Step 2023: Generate a second set according to the information of the fragments corresponding to the important sessions among the fragments corresponding to the PDU session currently established by the terminal.

In some embodiments, the important session is a session corresponding to the important service determined based on the service subscription relationship. The source base station may also query the core network device for the corresponding relationship between the important services determined based on the subscription relationship and the session to obtain the important session identifier. As shown in Figure 5, step 202 may also include steps 2024 to 2026.

Step 2024: Query the core network device for the correspondence between important services and sessions determined based on the ordering relationship to obtain important session identifiers.

Step 2025: Determine important sessions in the PDU sessions currently established by the terminal according to the important session identifiers, and obtain information about fragments corresponding to the important sessions in the PDU sessions currently established by the terminal.

Step 2026: Generate a second set according to the information of the fragments corresponding to the important sessions among the fragments corresponding to the PDU session currently established by the terminal.

Understandably, important conversations may refer to conversations that the user does not want to be interrupted, such as a voice call the user is making, or the user is using the navigation function of the map. The conversation corresponding to the voice call or the navigation function of the map can be considered It's an important conversation.

In some embodiments, the important session is a session corresponding to the application currently in the foreground of the terminal. It can be understood that the session corresponding to the application in the foreground of the terminal may refer to the session corresponding to the application to which the interface currently presented on the terminal screen belongs. As shown in Figure 6, step 202 may also include steps 2027 to 2029.

Step 2027: Query the terminal for the session identifier corresponding to the application currently in the foreground.

For example, during a voice call, the user switches the screen to another application other than the voice call, and a call-in-progress mark will be displayed on the edge or corner of the screen. Then the other applications on the screen and the voice call belong to the same terminal. The application currently in the foreground. For example, as shown in Figure 5, the user is making a voice call and is viewing the calendar. The screen currently stays on the calendar interface, and there is a "Call Now" mark in the upper left corner of the screen. In this case, the calendar and the voice call both belong to the terminal's current interface. The application in the foreground. It is understandable that the application currently in the foreground of the terminal is not necessarily a network session. For example, the calendar in Figure 7 is usually an application that does not require a network connection.

Step 2028: According to the session identifier corresponding to the application currently in the foreground, obtain the information of the shard corresponding to the session corresponding to the application currently in the foreground.

Step 2029: Generate a second set based on the information about the shards corresponding to the session corresponding to the application currently in the foreground.

Step 203: Determine the target base station among the neighboring base stations of the source base station according to the first set and the second set.

In some embodiments, the implementation method of step 203 may include: determining whether the first set and the second set include the same fragments. If so, the base station is reselected among the neighboring base stations of the source base station according to the second set to determine the target base station. If not, the first base station is determined to be the target base station.

It can be understood that, after acquiring the second set from the terminal, the source base station may compare the first set and the second set. If the fragmentation information in the second set does not exist in the first set (that is, the intersection of the first set and the second set is an empty set), it means that the session corresponds to a fragmentation that is not supported by the first base station. It is not an important session. Therefore, if there is no better choice, the first base station can be used as the target base station to perform base station switching. However, if part or all of the fragmentation information in the second set exists in the first set (that is, the intersection of the first set and the second set is not an empty set), it means that the fragmentation information is not supported by the first base station. Some of the corresponding sessions are important sessions. At this time, the source base station can reselect a base station among adjacent base stations, and use the reselected base station as the target base station to perform base station switching (the reselected base station may also be the first base station). , to avoid interruption of important conversations to the greatest extent.

In some embodiments, as shown in FIG. 8 , the method of reselecting a base station among neighboring base stations of the source base station according to the second set to determine the target base station may include steps 301 to 303 .

Step 301: Send the second set to each base station in at least one other neighboring base station of the source base station.

In step 301, at least one other neighboring base station of the source base station is at least one base station other than the first base station among the neighboring base stations of the source base station. For example, when the first base station is base station 11, at least one other neighboring base station of the source base station may include base station 12 and base station 13. At least one other neighboring base station of the source base station may include a plurality of base stations. By sending the second set to each of the at least one other neighboring base station of the source base station (for example, base station 12 and base station 13), at least one of the source base station may Each base station among other neighboring base stations checks itself according to the second set to see whether it has fragments it can support.

Step 302: Respectively receive a third set of base stations from at least one other neighboring base station of the source base station.

In step 302, the third set of base stations from at least one other neighboring base station of the source base station is that each base station of the at least one other neighboring base station of the source base station supports one or more shards in the second set according to itself. The returned set consists of one or more shards in the second set supported by itself. Or the set is an empty set returned by each base station in at least one other neighboring base station of the source base station based on the fact that it does not support any fragment in the second set.

It can be understood that each of the at least one other neighboring base stations of the source base station can send the third set to the source base station (for example, each of the at least one other neighboring base stations of the source base station supports part of the second set respectively. fragmentation), that is to say, the number of base stations in at least one other neighboring base station of the source base station may be the same as the number of the third set received by the source base station. For example, the base station 10 may receive the third set from the base station 12 or the third set from the base station 13 .

Step 303: Determine whether at least one third base station exists in at least one other neighboring base station of the source base station according to the third set of base stations from the at least one other neighboring base station of the source base station. If present, the target base station is determined among at least one third base station and the first base station. If it does not exist, the first base station is determined to be the target base station.

In step 303, the base station that sends the third set that is not an empty set is the third base station.

It can be understood that if the third set sent by a certain base station to the source base station among at least one other neighboring base station of the source base station is not an empty set, it means that this certain base station can be corresponding to the fragments in the second set. The session provides network services, and the base station is the third base station. If there is at least one third base station (for example, base station 12), the target base station may be further determined among the at least one third base station and the first base station. If there is no third base station, it means that none of the at least one other neighboring base station of the source base station is unable to provide services for the important session of the terminal. In this case, the first base station with the best signal can be considered as the target base station.

In some embodiments, as shown in Figure 9, the method of determining a target base station in at least one third base station and the first base station may include steps 3031 to 3034.

Step 3031: Calculate the weight value of each third base station in the at least one third base station according to the importance of the fragments in the third set of each third base station in the at least one third base station.

Step 3032: Obtain the fourth set, and calculate the weighted value of the first base station according to the importance of the fragments in the fourth set.

In step 3032, the fourth set is the difference set between the second set and the first set.

It can be understood that the importance of a fragment and the importance of the session corresponding to the fragment may be the same, that is, a weight may be assigned to the conversation corresponding to the fragment according to the importance of the session.

For example, in steps 3031 and 3032, the importance of the session can be determined based on the service subscription relationship or whether it is a session corresponding to the application in the terminal's foreground. For example, the importance of the session corresponding to the application in the terminal's foreground can be set to 5. , set the importance of the session determined based on the business subscription relationship to a positive value below 5 such as 1, or 2, or 3, or 4 (the weight may not be an integer, this is only an exemplary explanation). The weighted value of each third base station is the sum of the importance corresponding to each fragment in the third set sent by the third base station. For example, if there is a third base station, and base station 12 and base station 13 are both third base stations, and the third set from base station 12 includes three fragments, and the importance of the three fragments are 2, 3, and 3 respectively, then Base station 10 may determine that the weight value of base station 12 is 8. And the third set from the base station 13 includes two fragments, the importance of the two fragments is 1 and 4 respectively, then the base station 10 can determine that the weight value of the base station 13 is 5.

Step 3033: Issue a second measurement instruction to the terminal.

In step 3033, the second measurement instruction is used to instruct the terminal to perform wireless signal measurement on each of the at least one third base station and send the second measurement result to the source base station.

It can be understood that since the first measurement instruction has instructed the terminal to perform wireless signal measurements on some of the base stations adjacent to the source base station, if the base station indicated in the second measurement instruction in step 3033 by the terminal to measure is different from the base station indicated in the first measurement instruction. If the base station measured by the terminal has the same base station, it does not need to perform wireless signal measurement on the same base station, but directly obtains the terminal's wireless signal measurement result on the same base station from the first measurement result.

Step 3034: Determine the target base station among the first base station and at least one third base station based on the first measurement result, the weighted value of the first base station, the second measurement result, and the weighted value of each of the at least one third base station. .

In step 3034, the target base station is the base station with the largest weight value among the first base station and at least one third base station whose measurement results meet the handover conditions. The first measurement result is a measurement result from the terminal that the source base station instructs the terminal to measure adjacent base stations of the source base station before receiving the first response information from the first base station. If there are multiple base stations with the largest weighted values and the same weighted values among the first base station and at least one third base station whose measurement results meet the handover conditions, the target base station is the wireless signal quality among multiple base stations with the largest weighted values and the same weighted values. Best base station.

It can be understood that the first measurement result in step 3034 is the first measurement result in step 206, and the first measurement result includes the measurement result of the first base station. Therefore, the measurement result of the first base station can be determined based on the first measurement result and the measurement result of the first base station. The target base station is determined among the first base station and the at least one third base station based on the weighting value, the second measurement result and the weighting value of each of the at least one third base station.

It can be understood that in step 3033, instructing the terminal to perform wireless signal measurement on each of the at least one third base station according to the weighted value of each of the at least one third base station may be to instruct the terminal to perform wireless signal measurement on the current location of the terminal. The wireless signal quality of cells belonging to other adjacent base stations adjacent to the cell of the source base station is measured. The specific measurement method may be any one of methods one to three. The following embodiments illustrate the implementation of steps 3033 to 3034 in three ways.

Method 1: Sort the weighted value of the first base station and the weighted value of each third base station in at least one third base station from large to small, and sort the weighted value of the first base station and each third base station in the at least one third base station. The base station weighting values in descending order instruct the terminal to perform wireless signal measurements on the first base station and each of the at least one third base station (whether it is a certain base station of the at least one third base station or the first base station, If the first measurement result already contains the measurement result for the base station, the source base station may instruct the terminal to skip the measurement for the base station and obtain the result directly from the first measurement result). Each time a measurement is completed, the terminal sends a measurement result to the source base station. The source base station can perform detection based on the measurement results. If the measurement results meet the conditions for base station handover, the base station that meets the base station handover conditions can be determined to be the target base station. After determining the target base station, there is no need to measure base stations that are smaller than the weighted value of the target base station. For example, if the weighted value of the first base station is greater than the weighted value of each third base station in at least one third base station, the source base station can The measurement result of the first base station is directly obtained from the first measurement result, and the first base station can be determined as the target base station, thereby saving network resources and improving efficiency.

Method 2: Instruct the terminal at one time to perform wireless signal measurement on each of the first base station and at least one third base station (whether it is a base station among the at least one third base station or the first base station, if the first measurement result There is already a measurement result for the base station in the source base station. The source base station can instruct the terminal to skip the measurement of the base station and obtain the result directly from the first measurement result), and then select the weighted value from the base station whose measurement result meets the base station switching conditions. The largest base station is used as the target base station.

Method 3: Sort the weighted value of the first base station and the weighted value of each third base station in at least one third base station from large to small, and select the top n weighted values from the first base station and at least one third base station. n base stations (n is an integer, and n is greater than zero but less than the total number of third base stations). Instruct the terminal to measure these base stations (whether it is a base station among at least one third base station or the first base station, if the first measurement result already contains a measurement result for the base station, the source base station can instruct the terminal to skip the base station. measurement, and obtain the result directly from the first measurement result), and then select the base station with the largest weight value as the target base station among the base stations whose measurement results meet the base station switching conditions. If all measurement results do not meet the base station switching conditions, the terminal is instructed to measure n base stations ranked from (n+1) to (n+n), and so on. It can be understood that when n=1, method three is equivalent to method two. When n is equal to the total number of third base stations, method three is equivalent to method one. In method three, the value of n is 1 to the total number of third base stations. Take integers between numbers as an example.

It can be understood that among the above three methods, if there are two or more base stations with the same weight value and both meet the base station switching conditions, the base station with the best measurement result is selected from the two or more base stations as the target base station.

Step 204: Switch the terminal to the target base station.

In some embodiments, as shown in Figure 10, the implementation method of step 204 may include steps 2041 to 2042.

Step 2041: Send the second handover request information to the target base station, so that the target base station performs access control check on the terminal.

In some embodiments, the second handover request information includes indication information, and the indication information is used to instruct the target base station to ignore fragments that the target base station does not support and allow the terminal to access.

It can be understood that the indication information included in the second handover request information can cause the target base station to no longer perform the steps in steps 201 to 203, thereby improving the response speed and bringing a better experience to the user.

Step 2042: Receive the handover request response information from the target base station, and send radio resource control RRC signaling to the terminal, so that the terminal completes time-frequency synchronization with the target base station and then sends RRC signaling to the target base station to complete the handover.

Through a handover method provided by some embodiments of the present invention, when the terminal is in the RRC_CONNECTED state and the source base station sends a handover request to the target base station, it can not only rely on the terminal's measurement report and wireless resource management information of the target base station, but also Taking into account the fragmentation of terminal PDU sessions, the target base station is selected from the perspective of user business requirements and wireless resources to provide users with better network services as much as possible.

The following is an example of some embodiments of the invention.

In the existing technology, when a terminal switches between base stations in the RRC_CONNECTED state, the mobility process of the control plane includes:

(1) The source base station configures the UE measurement process, and the UE performs wireless signal measurement according to the measurement configuration and sends a measurement report to the source base station.

(2) The source base station decides to handover the UE to other base stations based on the measurement report and radio resource management information.

(3) The source base station sends a handover request to the target base station, which includes: PDU session related information. PDU session information also includes: fragmentation information, QoS flow level, and QoS configuration information.

(4) The target base station performs access control check on the terminal. If the slice associated with a certain PDU session on the terminal is not supported on the target base station, the target base station will refuse to provide services for the corresponding PDU session.

(5) The target base station sends a handover request response to the source base station.

(6) The source base station instructs the terminal to switch to the target base station through RRC signaling.

(7) The terminal completes time-frequency synchronization with the target base station, and sends RRC signaling to the target base station to complete the handover.

The basic method is as follows:

1. The target base station sends the unsupported fragment set 1 to the source base station based on the fragmentation information corresponding to the terminal PDU session sent by the source base station.

2. The source base station obtains the fragment set 2 of important sessions in the current PDU session of the terminal.

a) Important conversations, including:

·Conversations corresponding to important businesses determined based on business subscription relationships.

·The session corresponding to the application currently in the foreground of the terminal, that is, the session corresponding to the application to which the interface currently presented on the terminal screen belongs.

―For some terminals, during a voice call, when switching to other applications (other than voice calls), a "call in progress" mark will be displayed at the edge or corner of the screen. At this time, it is determined whether "other applications" and "voice "Call" is also a "foreground" application. See Figure 7.

―Foreground applications do not necessarily have a network session. For example, "Calendar" is usually an application that does not require a network connection.

b) Get important conversations:

[1] Query whether the correspondence between important services and sessions determined by the ordering relationship is saved locally to obtain important session identifiers.

[2] Query the core network for the correspondence between important services and sessions determined based on the ordering relationship to obtain important session identifiers

[3] Query the terminal for the session ID corresponding to the application currently in the foreground.

c) Combine the above and the corresponding relationship between locally saved terminal sessions and shards to determine set 2.

3. If the intersection of set 1 and set 2 is not empty, send set 2 to other neighboring base stations and request other neighboring base stations to return the fragment set 3 in set 2 that they support respectively. And the calculation yields set 4.

·The intersection of set 1 and set 2 is not empty, indicating that the fragments that are not supported by the target base station include fragments corresponding to sessions that are important to the terminal.

·Adjacent base stations: base stations adjacent to the coverage area of the source base station.

·Other adjacent base stations: In addition to the target base station, base stations adjacent to the coverage area of the source base station.

·Set 4: The difference set between set 2 and set 1, that is, the set obtained after removing the shard entries in set 1 from set 2.

·Due to the existing technology, when the terminal is in the RRC_CONNECTED state, the source base station sends a handover request to the target base station based on the terminal's measurement report and radio resource management information of the target base station. The fragmentation of terminal PDU sessions is not considered. Therefore, the target base station may be the optimal choice only from the perspective of wireless resources, but may not be the optimal choice in terms of user business requirements.

4. The source base station calculates the weighted value for set 4 and each set 3, and instructs the terminal to measure each other adjacent base station, and when the measurement results meet the base station handover conditions, send a handover request to the base station that meets the conditions.

·Weighted value: The higher the importance of the session corresponding to the shard, the greater the weight value.

·Calculate the weighted value: The sum of the weight values corresponding to the shard entries in each collection is the weighted value of each collection. If the set is empty, the weight value is 0.

·Instruct the terminal to measure other neighboring base stations: In essence, it measures the wireless signal quality of cells adjacent to the cell where the terminal is currently located (belonging to other neighboring base stations) (belonging to other neighboring base stations)

·The specific measurement method can be one of the following methods:

―For all base stations whose weighted values are not 0, instruct the terminal to measure each base station in order from large to small weighted values. After each measurement is completed, the measurement results are checked. If the measurement results meet the base station switching conditions, the corresponding The base station issues a handover request.

―For all base stations whose weighted values are not 0, instruct the terminal to measure all other neighboring base stations at once, and then select the base station with the largest weighted value among the base stations whose measurement results meet the base station switching conditions and issue a handover request to it.

―For all base stations whose weighted values are not 0, select n base stations with the top n weighted values (when n=1, it is equivalent to the second item. When n is equal to the total number of weighted values, it is equivalent to the first item) , instructs the terminal to measure these base stations, and then selects the base station with the largest weight value among the base stations whose measurement results meet the base station switching conditions, and sends a handover request to it. If all measurement results do not meet the base station switching conditions, the terminal is instructed to measure n base stations ranked from n+1 to n+n, and so on.

·Among the above three methods, if the base station selected to be measured is the target base station, there is no need to instruct the terminal to measure this base station, because the terminal has already performed measurements on the target base station before step 1. Repeated measurements are not necessary.

·Among the above three methods, if the weighted values are the same and all meet the base station switching conditions, the base station with the best measurement results will be selected and a handover request will be sent to it.

·The weighted value calculated based on set 4 corresponds to the destination base station. Since the weight value corresponding to the destination base station is not necessarily smaller than that of other adjacent base stations, step 4.

The destination base station needs to be included in .

Base station switching conditions: the same as those used in the prior art. That is, the decision condition used in "(2) The source base station decides to switch the UE to another base station based on the measurement report and radio resource management information" in the related art.

Some embodiments of the present invention provide a switching method, which is applied to core network equipment. As shown in Figure 11, the switching method includes steps 1101 to 1102.

Step 1101: Receive first query information from the source base station.

In step 1101, the first query information is used to query the core network device for the corresponding relationship between important services and sessions determined based on the ordering relationship. The first query information is sent by the source base station to the core network device after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request.

Step 1102: Send the correspondence between important services and sessions determined according to the ordering relationship to the source base station, so that the source base station obtains the important session identifier based on the correspondence between the important service and session determined according to the ordering relationship and obtains the second set according to the important session identifier. .

In step 1102, the second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal.

It can be understood that for the core network equipment in steps 1101 and 1102, reference can be made to the relevant description of the core network equipment in step 2021 in the above embodiment, which will not be described again here.

Some embodiments of the present invention provide a switching method, which is applied to a terminal. As shown in Figure 12, the method includes steps 1201 to 1202.

Step 1201: Receive second query request information from the source base station.

In step 1201, the second query request information is used to query the terminal for the session identifier corresponding to the application currently in the foreground. The second query request information is sent by the source base station to the terminal after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request. as well as

Step 1202: Send the session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station obtains the second set according to the session identifier corresponding to the application currently in the foreground.

In step 1202, the second set includes fragments corresponding to the session corresponding to the application currently in the foreground of the terminal among the fragments corresponding to the PDU session currently established by the terminal.

In some embodiments, as shown in Figure 13, the method further includes steps 1301 to 1302.

Step 1301: Receive the first measurement instruction from the source base station.

In step 1301, the first measurement instruction is used to instruct the terminal to perform wireless signal measurement according to the measurement configuration and send the first measurement result to the source base station. Among them, the measurement configuration is the configuration performed by the source base station for the terminal.

Step 1302: Perform wireless signal measurements on the base stations included in the measurement configuration in the first measurement instruction, and send the first measurement results to the source base station, so that the source base station performs wireless signal measurement on adjacent base stations of the source base station based on the first measurement results and wireless resource management information. Determine the first base station.

It can be understood that for the first measurement instruction in step 1301 and the first measurement result and the method for the source base station to determine the first base station in step 1302, reference can be made to the relevant descriptions in the above embodiments, which will not be described again here.

In some embodiments, as shown in Figure 14, the method further includes steps 1401 to 1402.

Step 1401: Receive a second measurement instruction from the source base station.

Step 1402: Perform wireless signal measurement on the base station included in the measurement configuration in the second measurement instruction, and send the second measurement result to the source base station.

It can be understood that for the second measurement instruction in step 1401 and the second measurement result in step 1402, reference can be made to the relevant descriptions in the above embodiments, which will not be described again here.

In some embodiments, the method further includes: receiving RRC signaling from the source base station to complete time-frequency synchronization with the target base station and handover to the target base station.

It can be understood that for the RRC signaling and the target base station, reference can be made to the relevant descriptions in the above embodiments, which will not be described again here.

Some embodiments of the present invention provide a switching device. As shown in Figure 15, the switching device 1500 includes a first response information receiving module 1501, a second set obtaining module 1502, a target base station determining module 1503, and a switching module 1504.

The first response information receiving module 1501 is configured to: receive the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request.

The second set acquisition module 1502 is configured to: acquire the second set. The second set includes a set of fragments corresponding to important sessions in the information of fragments corresponding to the PDU session currently established by the terminal. The important session is a session corresponding to an important service determined based on the service subscription relationship, and/or a session corresponding to an application currently in the foreground of the terminal.

The target base station determination module 1503 is configured to: determine the target base station among the neighboring base stations of the source base station according to the first response information.

The switching module 1504 is configured to: switch the terminal to the target base station.

In some embodiments, as shown in Figure 16, the switching device 1500 also includes a first measurement instruction sending module 1505, a first measurement result receiving module 1506, and a first switching request information sending module 1507.

The first measurement instruction sending module 1505 is configured to perform measurement configuration for the terminal and send the first measurement instruction to the terminal. The first measurement instruction is used to instruct the terminal to perform wireless signal measurement according to the measurement configuration and send the first measurement result to the source base station.

The first measurement result receiving module 1506 is configured to: receive the first measurement result from the terminal, and determine the first base station among the neighboring base stations of the source base station based on the first measurement result and the radio resource management information.

The first handover request information sending module 1507 is configured to: send the first handover request information to the first base station, so that the first base station sends the first response information to the source base station.

In some embodiments, as shown in Figure 17A, the second collection acquisition module 1502 includes a local query unit 1521, an important session determination unit 1522, and a second collection generation unit 1523.

The local query unit 1521 is configured to query whether the corresponding relationship between important services and sessions determined according to the ordering relationship is stored locally. If so, obtain the important session identifier based on the corresponding relationship between the important services and sessions determined according to the ordering relationship.

In some embodiments, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the subscription relationship. Then, the corresponding relationship between important services and sessions determined based on the ordering relationship stored locally by the source base station is sent to the source base station by the core network device in response to detecting that the terminal has subscribed to the important service and accessed the source base station.

In some embodiments, if the source base station locally stores the corresponding relationship between important services and sessions determined based on the subscription relationship. Then, the correspondence between important services and sessions determined based on the ordering relationship and stored locally by the source base station is sent by the second base station to the source base station. The second base station is the base station that switches the terminal to the source base station.

The important session determining unit 1522 is configured to: determine important sessions in the PDU sessions currently established by the terminal according to the important session identifiers, and obtain information about fragments corresponding to the important sessions in the PDU sessions currently established by the terminal.

The second set generating unit 1523 is configured to: generate a second set based on the information of the fragments corresponding to the important session among the fragments corresponding to the PDU session currently established by the terminal.

In some embodiments, as shown in Figure 17B, the second collection acquisition module 1502 includes a first query request information sending unit 1524, an important session determination unit 1522, and a second collection generation unit 1523.

The first query request information sending unit 1524 is configured to query the core network device for the corresponding relationship between important services and sessions determined based on the ordering relationship, so as to obtain the important session identifier.

The important session determining unit 1522 is configured to: determine important sessions in the PDU sessions currently established by the terminal according to the important session identifiers, and obtain information about fragments corresponding to the important sessions in the PDU sessions currently established by the terminal.

The second set generating unit 1523 is configured to: generate a second set based on the information of the fragments corresponding to the important session among the fragments corresponding to the PDU session currently established by the terminal.

In some embodiments, as shown in Figure 17C, the second set acquisition module 1502 includes a second query request information sending unit 1525, a session identification receiving unit 1526, and a second set generating unit 1523.

The second query request information sending unit 1525 is configured to query the terminal for the session identifier corresponding to the application currently in the foreground.

The session identification receiving unit 1526 is configured to obtain, according to the session identification corresponding to the application currently in the foreground, the information of the fragment corresponding to the session corresponding to the application currently in the foreground.

The second set generating unit 1523 is configured to generate a second set based on the information of the fragments corresponding to the session corresponding to the application currently in the foreground.

In some embodiments, the target base station determination module 1503 is configured to determine whether the first set and the second set include the same fragments. If so, the base station is reselected among the neighboring base stations of the source base station according to the second set to determine the target base station. If not, the first base station is determined to be the target base station.

In some embodiments, as shown in Figure 18, the switching device 1500 also includes a second set sending module 1508, a third set receiving module 1509 and a third base station judging module 1510.

The second set sending module 1508 is configured to send the second set to each base station in at least one other neighboring base station of the source base station. At least one other neighboring base station of the source base station is at least one base station other than the first base station among the neighboring base stations of the source base station.

The third set receiving module 1509 is configured to respectively receive a third set of base stations from at least one other neighboring base station of the source base station. The third set of base stations from the source base station's at least one other neighbor base station is returned by each of the source base station's at least one other neighbor base station based on its own support for one or more shards in the second set. A set consisting of one or more shards in the second set supported by itself. Or the set is an empty set returned by each base station in at least one other neighboring base station of the source base station based on the fact that it does not support any fragment in the second set.

The third base station determination module 1510 is configured to determine whether there is at least one third base station in at least one other neighboring base station of the source base station according to a third set of base stations from the at least one other neighboring base station of the source base station. If it exists, the target base station determining module 1503 determines the target base station among at least one third base station and the first base station. If it does not exist, the target base station determination module 1503 determines the first base station as the target base station. The base station that sends the third set that is not an empty set is the third base station.

In some embodiments, as shown in Figure 19, the switching device 1500 further includes a weighted value acquisition module 1511, a fourth set acquisition module 1512, and a second measurement instruction sending module 1513.

The weighting value acquisition module 1511 is configured to: calculate the weighting value of each third base station in the at least one third base station according to the importance of the fragments in the third set of each third base station in the at least one third base station.

The fourth set acquisition module 1512 is configured to: acquire the fourth set, and calculate the weighted value of the first base station according to the importance of the fragments in the fourth set. The fourth set is the difference set between the second set and the first set.

The second measurement instruction sending module 1513 is configured to: issue a second measurement instruction to the terminal. The second measurement instruction is used to instruct the terminal to perform wireless signal measurement on each of the at least one third base station and send the second measurement result to the source base station.

The target base station determination module 1503 is configured to: based on the first measurement result, the weighted value of the first base station, the second measurement result and the weighted value of each of the at least one third base station, determine the target base station and the at least one third base station. Determine the target base station among the base stations. The target base station is the base station with the largest weight value among the first base station and at least one third base station whose measurement results meet the handover conditions. The first measurement result is a measurement result from the terminal that the source base station instructs the terminal to measure adjacent base stations of the source base station before receiving the first response information from the first base station. If there are multiple base stations with the largest weighted values and the same weighted values among the first base station and at least one third base station whose measurement results meet the handover conditions, the target base station is the wireless signal quality among multiple base stations with the largest weighted values and the same weighted values. Best base station.

In some embodiments, as shown in Figure 20, the switching module 1504 includes a second switching request information sending unit 1541, a switching request response information receiving unit 1542, and an RRC signaling sending unit 1543.

The second handover request information sending unit 1541 is configured to send the second handover request information to the target base station, so that the target base station performs access control check on the terminal.

In some embodiments, the second handover request information includes indication information, and the indication information is used to instruct the target base station to ignore fragments that the target base station does not support and allow the terminal to access.

The handover request response information receiving unit 1542 is configured to receive handover request response information from the target base station.

The RRC signaling sending unit 1543 is configured to send radio resource control RRC signaling to the terminal, so that the terminal completes time-frequency synchronization with the target base station and then sends RRC signaling to the target base station to complete the handover.

For specific solutions and beneficial effects of a switching device provided by some embodiments of the present invention, reference may be made to the relevant description of a switching method provided by some embodiments of the present invention, which will not be described again here.

Some embodiments of the present invention provide a core network device. As shown in Figure 21, the core network device 2100 includes a first query request information receiving module 2101 and a corresponding relationship sending module 2102.

The first query request information receiving module 2101 is configured to: receive the first query information from the source base station. The first query information is used to query the core network device for the corresponding relationship between important services and sessions determined based on the ordering relationship. The first query information is sent by the source base station to the core network device after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request.

The correspondence sending module 2102 is configured to: send to the source base station the correspondence between important services and sessions determined according to the ordering relationship, so that the source base station obtains the important session identifier based on the correspondence between important services and sessions determined according to the ordering relationship and obtains the important session identifier according to the important The session ID is obtained from the second set. The second set includes a set of fragments corresponding to important sessions among the fragments corresponding to the PDU session currently established by the terminal.

For specific solutions and beneficial effects of a core network device provided by some embodiments of the present invention, reference may be made to the relevant description of a handover method provided by some embodiments of the present invention, which will not be described again here.

Some embodiments of the present invention provide a terminal. As shown in Figure 22, the terminal 2200 includes a second query request information receiving module 2201 and a session identification sending module 2202.

The second query request information receiving module 2201 is configured to: receive the second query request information from the source base station. The second query request information is used to query the terminal for the session identifier corresponding to the application currently in the foreground. The second query request information is sent by the source base station to the terminal after acquiring the first response information from the first base station. The first base station is one of the adjacent base stations of the source base station. The first response information is sent by the first base station to the source base station in response to receiving the first handover request information from the source base station. The first handover request information includes information about fragments corresponding to the PDU session currently established by the terminal. The first response information includes the first set. The first set includes a set of fragments that are not supported by the first base station among the fragments corresponding to the PDU session currently established by the terminal. The terminal is the terminal corresponding to the first handover request.

The session identifier sending module 2202 is configured to: send the session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station obtains the second set according to the session identifier corresponding to the application currently in the foreground. The second set includes fragments corresponding to the session corresponding to the application currently in the foreground of the terminal among the fragments corresponding to the PDU session currently established by the terminal.

In some embodiments, as shown in Figure 23, the terminal 2200 also includes a first measurement instruction receiving module 2203, a wireless signal measurement module 2204, and a first measurement result sending module 2205.

The first measurement instruction receiving module 2203 is configured to: receive the first measurement instruction from the source base station.

The wireless signal measurement module 2204 is configured to: perform wireless signal measurement on the base station included in the measurement configuration in the first measurement instruction.

The first measurement result sending module 2205 is configured to: send the first measurement result to the source base station, so that the source base station determines the first base station among neighboring base stations of the source base station based on the first measurement result and radio resource management information.

In some embodiments, as shown in Figure 24, the terminal 2200 further includes a second measurement instruction receiving module 2206 and a second measurement result sending module 2207.

The second measurement instruction receiving module 2206 is configured to receive a second measurement instruction from the source base station.

The wireless signal measurement module 2204 is also configured to perform wireless signal measurement on the base station included in the measurement configuration in the second measurement instruction.

The second measurement result sending module 2207 is configured to: send the second measurement result to the source base station.

In some embodiments, as shown in Figure 25, the terminal 2200 further includes an RRC signaling receiving module 2208. The RRC signaling receiving module 2208 is configured to receive RRC signaling from the source base station to complete time-frequency synchronization with the target base station and switch to the target base station.

For specific solutions and beneficial effects of a terminal provided by some embodiments of the present invention, reference may be made to the relevant description of a switching method provided by some embodiments of the present invention, which will not be described again here.

Some embodiments of the present invention provide a computer device. As shown in Figure 25, the computer device 2500 includes a memory 2501 and a processor 2502. A computer program is stored in the memory 2501. When the processor 2502 runs the computer program stored in the memory 2501, The processor 2502 executes the above switching method.

For specific solutions and beneficial effects of a computer device provided by some embodiments of the present invention, reference may be made to the relevant description of a switching method provided by some embodiments of the present invention, which will not be described again here.

Some embodiments of the present invention provide a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the processor executes the above switching method.

For specific solutions and beneficial effects of a computer-readable storage medium provided by some embodiments of the present invention, reference may be made to the relevant description of a switching method provided by some embodiments of the present invention, which will not be described again here.

Those of ordinary skill in the art can understand that all or some steps, systems, and functional modules/units in the devices disclosed above can be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may consist of several physical components. Components execute cooperatively. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit . Such software may be distributed on computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is known to those of ordinary skill in the art, the term computer storage media includes volatile and nonvolatile media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. removable, removable and non-removable media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, tapes, disk storage or other magnetic storage devices, or may Any other medium used to store the desired information and that can be accessed by a computer. Additionally, it is known to those of ordinary skill in the art that communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media .

It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (18)

1. A method of handover, applied to a source base station, the method comprising:

receiving first response information from a first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the protocol data unit PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request;

Acquiring a second set; the second set comprises a set of fragments corresponding to important sessions among fragments corresponding to PDU sessions currently established by the terminal; the important session is a session corresponding to an important service determined according to a service subscription relationship and/or a session corresponding to an application currently in the foreground of the terminal;

determining a target base station in the adjacent base stations of the source base station according to the first set and the second set; and

and switching the terminal to the target base station.

2. The handover method according to claim 1, wherein the acquiring the second set includes:

inquiring whether the corresponding relation between the important business and the session determined according to the subscription relation is stored locally, if so, obtaining an important session identifier based on the corresponding relation between the important business and the session determined according to the subscription relation;

determining an important session in the PDU session currently established by the terminal according to the important session identifier, and acquiring the information of the fragments corresponding to the important session in the PDU session currently established by the terminal; and

and generating a second set according to the information of the fragments corresponding to the important session in the fragments corresponding to the PDU session which is currently established by the terminal.

3. The handover method according to claim 2, wherein,

if the source base station locally stores the corresponding relation between the important business and the session determined according to the subscription relation; the correspondence between the important service and session determined according to the subscription relationship, which is locally stored by the source base station, is sent to the source base station by the core network device in response to detecting that the terminal subscribes to the important service and accesses the source base station.

4. The handover method according to claim 2, wherein if the source base station locally stores a correspondence between important services and sessions determined according to a subscription relationship; the corresponding relation between the important business and the session, which are locally stored by the source base station and are determined according to the subscription relation, is sent to the source base station by a second base station; the second base station is a base station that switches the terminal to the source base station.

5. The handover method according to claim 1, wherein the acquiring the second set includes:

inquiring the corresponding relation between the important business and the session determined according to the subscription relation to the core network equipment so as to obtain an important session identifier;

determining an important session in the PDU session currently established by the terminal according to the important session identifier, and acquiring the information of the fragments corresponding to the important session in the PDU session currently established by the terminal; and

And generating a second set according to the information of the fragments corresponding to the important session in the fragments corresponding to the PDU session which is currently established by the terminal.

6. The handover method according to claim 1, wherein the acquiring the second set includes:

inquiring a session identifier corresponding to an application currently in a foreground from a terminal;

acquiring the information of fragments corresponding to the session corresponding to the application currently in the foreground according to the session identifier corresponding to the application currently in the foreground; and

and generating a second set according to the information of the fragments corresponding to the session corresponding to the application currently in the foreground.

7. The handover method according to claim 1, wherein the determining a target base station among neighboring base stations of the source base station according to the first set and the second set comprises:

judging whether the first set and the second set comprise the same fragments or not; if yes, reselecting the base station in the adjacent base stations of the source base station according to the second set so as to determine the target base station; if not, determining the first base station as the target base station.

8. The method of handover according to claim 7, wherein reselecting a base station among neighboring base stations of the source base station according to the second set to determine the target base station comprises:

Transmitting the second set to each of at least one other neighboring base station of the source base station, respectively; at least one other adjacent base station of the source base station is at least one base station other than the first base station among the adjacent base stations of the source base station;

receiving a third set of each of at least one other neighboring base station from the source base station, respectively; the third set of each base station in the at least one other adjacent base station from the source base station is a set composed of one or more fragments in the second set supported by itself, which is returned by each base station in the at least one other adjacent base station of the source base station according to the one or more fragments in the second set supported by itself; or the set is an empty set returned by each base station in at least one other adjacent base station of the source base station according to the fact that the base station does not support any one of the fragments in the second set; and

determining whether at least one third base station is present in at least one other neighboring base station of the source base station according to the third set of individual base stations from the at least one other neighboring base station of the source base station; if so, determining the target base station in the at least one third base station and the first base station; if the first base station does not exist, determining the first base station as a target base station; the base stations that emit the third set that are not the null set are third base stations.

9. The handover method according to claim 8, wherein said determining the target base station among the at least one third base station and the first base station comprises:

calculating a weighted value of each third base station in the at least one third base station according to the importance degree of the fragments in the third set of each third base station in the at least one third base station;

acquiring a fourth set, and calculating a weighted value of the first base station according to the importance degree of the fragments in the fourth set; the fourth set is a difference set between the second set and the first set;

sending a second measurement instruction to the terminal; the second measurement instruction is used for indicating the terminal to measure wireless signals of each third base station in the at least one third base station and sending a second measurement result to the source base station; and

determining the target base station in the first base station and the at least one third base station according to a first measurement result, a weighted value of the first base station, a weighted value of the second measurement result and each third base station in the at least one third base station; the target base station is the base station with the largest weighting value in the base stations with the measurement results meeting the switching conditions in the first base station and at least one third base station; the first measurement result is a measurement result from the terminal, wherein the measurement result indicates the terminal to measure the adjacent base station of the source base station before the source base station receives the first response information from the first base station; if a plurality of base stations with the largest weighted values and the same weighted values exist in the base stations with the measurement results meeting the switching conditions in the first base station and the at least one third base station, the target base station is the base station with the best wireless signal quality in the base stations with the largest weighted values and the same weighted values.

10. The handover method according to claim 1, wherein the handover of the terminal to the target base station comprises:

sending second switching request information to the target base station so that the target base station performs access control check on the terminal; and

and receiving switching request response information from the target base station, and sending Radio Resource Control (RRC) signaling to the terminal so that the terminal and the target base station complete time-frequency synchronization and then send the RRC signaling to the target base station to complete switching.

11. The handover method according to claim 10, wherein the second handover request information includes indication information for instructing the target base station to ignore fragments not supported by the target base station and to allow the terminal to access.

12. A handover method applied to a core network device, comprising:

receiving first query information from a source base station; the first query information is used for querying the core network equipment for the corresponding relation between the important service and the session determined according to the subscription relation; the first query information is sent to the core network device by the source base station after acquiring first response information from a first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request; and

Sending the corresponding relation between the important business and the session determined according to the subscription relation to the source base station, so that the source base station obtains an important session identifier based on the corresponding relation between the important business and the session determined according to the subscription relation and obtains a second set according to the important session identifier; the second set includes a set of slices corresponding to important sessions among the slices corresponding to the PDU sessions currently established by the terminal.

13. The switching method is characterized by being applied to a terminal and comprising the following steps:

receiving second query request information from a source base station; the second inquiry request information is used for inquiring the session identifier corresponding to the application currently in the foreground to the terminal; the second inquiry request information is sent to the terminal after the source base station acquires first response information from the first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request; and

Transmitting a session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station acquires a second set according to the session identifier corresponding to the application currently in the foreground; the second set includes fragments corresponding to a session corresponding to an application currently in a foreground of the terminal among fragments corresponding to a PDU session currently established by the terminal.

14. A switching device, comprising:

a first response information receiving module configured to: receiving first response information from a first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request;

a second set acquisition module configured to: acquiring a second set; the second set comprises a set of fragments corresponding to important session in the fragments corresponding to PDU session currently established by the terminal; the important session is a session corresponding to an important service determined according to a service subscription relationship and/or a session corresponding to an application currently in the foreground of the terminal;

A target base station determining module configured to: determining a target base station in the adjacent base stations of the source base station according to the first set and the second set; and

a switching module configured to: and switching the terminal to the target base station.

15. A core network device, comprising:

a first query request information receiving module configured to: receiving first query information from a source base station; the first query information is used for querying the core network equipment for the corresponding relation between the important service and the session determined according to the subscription relation; the first query information is sent to the core network device by the source base station after acquiring first response information from a first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request; and

A correspondence sending module configured to: sending the corresponding relation between the important business and the session determined according to the subscription relation to a source base station, so that the source base station obtains an important session identifier based on the corresponding relation between the important business and the session determined according to the subscription relation and obtains a second set according to the important session identifier; the second set includes a set of slices corresponding to important sessions among the slices corresponding to the PDU sessions currently established by the terminal.

16. A terminal, comprising:

a second query request information receiving module configured to: receiving second query request information from a source base station; the second inquiry request information is used for inquiring the session identifier corresponding to the application currently in the foreground to the terminal; the second inquiry request information is sent to the terminal after the source base station acquires first response information from the first base station; the first base station is one base station in adjacent base stations of the source base station; the first response information is sent to the source base station by the first base station in response to receiving first switching request information from the source base station; the first switching request information comprises the information of the fragments corresponding to the PDU session which is currently established by the terminal; the first response information includes a first set; the first set comprises a set of fragments which are not supported by a first base station in the fragments corresponding to the PDU session which is currently established by the terminal; the terminal is a terminal corresponding to the first switching request; and

A session identifier sending module, configured to: transmitting a session identifier corresponding to the application currently in the foreground to the source base station, so that the source base station acquires a second set according to the session identifier corresponding to the application currently in the foreground; the second set includes fragments corresponding to a session corresponding to an application currently in a foreground of the terminal among fragments corresponding to a PDU session currently established by the terminal.

17. A computer device comprising a memory and a processor, the memory having stored therein a computer program, which when executed by the processor performs the handover method according to any one of claims 1 to 11, or claim 12, or claim 13.

18. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, performs the handover method according to any one of claims 1 to 11, or claim 12, or claim 13.