Handover decision determination method, apparatus, communication system, and storage medium

Abstract

The application provides a handover decision determination method and device, a communication system and a storage medium. The method can be applied to the technical field of wireless communication. In the scheme, in the network state of RRC connection, a terminal device collects a measurement report, obtains a warning level and a report priority for evaluating the measurement report based on an AI model, and reports the measurement report, the warning level and the report priority to a source base station; the source base station formulates different cell handover decisions according to the measurement report, the warning level and the report priority, such as performing cell handover, calling auxiliary data related to subsequent cell handover decisions from a target base station, storing the measurement report in the source base station, and deleting historical measurement reports stored in the source base station. By setting the AI model in the terminal device, part of the work of evaluating the measurement report can be undertaken, the burden of the base station is reduced, the success rate of handover is improved, and the occurrence of invalid links is effectively avoided.

Description

Technical Field

[0001] The present application relates to the field of wireless communication technology, and in particular to a switching decision determination method, device, communication system and storage medium. Background Art

[0002] Handover (HO) refers to the process of switching from the original voice channel to a new idle voice channel to continue the call when the terminal device moves from one base station coverage area to another or when the call quality deteriorates due to external interference.

[0003] During the handover process, a terminal device continuously transmits its own measurement reports to the source base station based on the radio resource control (RRC) protocol. The source base station evaluates these measurement reports to determine whether a handover is necessary and, if so, sends a handover request to the target base station. The source base station sequentially evaluates all measurement reports submitted by each terminal device, resulting in a heavy evaluation burden and a high risk of link failures. Summary of the Invention

[0004] The present application provides a handover decision determination method, device, communication system and storage medium to solve the problem that the source base station has a heavy burden on evaluating measurement reports and is prone to failed links.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, a handover decision determination method is provided. This method can be executed, for example, by a terminal device, or by a component configured in the terminal device (such as a circuit, chip, or chip system), or by a logic module or software that implements all or part of the terminal device's functions. The following description uses a terminal device as an example.

[0007] The method may include: the terminal device obtains a measurement report of the measurement object under the RRC connection; the terminal device inputs the measurement report into the first model to obtain a warning level and a report priority corresponding to the measurement report, the warning level is used to indicate the urgency of the cell switching of the terminal device, and the report priority is used to indicate the importance of the warning level; the terminal device sends the measurement report, the warning level and the report priority to the source base station, and the measurement report, the warning level and the report priority are used to determine the cell switching decision.

[0008] In the above solution, since a first model (such as an AI model) is set up in the terminal device, after the terminal device collects the measurement report, it can input the measurement report into the first model to obtain the warning level and report priority used to evaluate the measurement report, and report the measurement report, warning level, and report priority to the source base station. The source base station can then make a cell switching decision based on the measurement report, warning level, and report priority. It can be understood that the first model set up in the terminal device can take on part of the work of evaluating the measurement report, reducing the burden on the base station, improving the success rate of switching, and effectively avoiding the occurrence of failed links.

[0009] In one possible implementation, the report priority can be determined based on at least one of the following: the similarity of data in measurement reports obtained at different times, the geographic location of the terminal device, the terminal device's movement speed, the terminal device's movement direction, and the predicted relationship between the terminal device's movement direction and network performance trends. In the above solution, these parameters can be used to measure the importance of the measurement report. For example, if the terminal device's warning level is high but the terminal device's movement speed is very slow, the report priority is low.

[0010] In one possible implementation, the measurement report includes the cell's signal quality. The measurement report is sent via a first signaling message, with the warning level and reporting priority included in the measurement report. Alternatively, the measurement report is sent via a first signaling message, with the warning level and reporting priority included via a second signaling message. In the above scheme, the measurement report, warning level, and reporting priority can be sent via a single signaling message or via two signaling messages. It will be appreciated that sending the information via a single signaling message reduces overhead, while sending the information via two signaling messages increases information transmission flexibility.

[0011] In a second aspect, a handover decision determination method is provided. This method can be performed, for example, by a source base station, or by components configured in the source base station (such as circuits, chips, or chip systems), or by a logic module or software capable of implementing all or part of the functions of the source base station. This application is not limited to this. The following description uses the source base station as an example.

[0012] The method may include: a source base station receiving a measurement report from a terminal device, as well as an alert level and a report priority corresponding to the measurement report, wherein the alert level is used to indicate the urgency of a cell handover for the terminal device, and the report priority is used to indicate the importance of the alert level; the source base station determining a cell handover decision based on the measurement report, the alert level, and the report priority. The cell handover decision may include at least one of the following: executing a cell handover; retrieving auxiliary data related to a subsequent cell handover decision from a target base station; storing the measurement report in the source base station, the measurement report being used to determine a subsequent cell handover decision; and deleting historical measurement reports stored in the source base station.

[0013] In the above solution, the terminal device not only provides the source base station with a measurement report, but also provides the corresponding warning level and reporting priority. The source base station can then integrate these parameters to make the current cell handover decision. Different warning level and reporting priority values ​​will result in different cell handover decisions made by the source base station. As can be seen, the terminal device partially takes on the task of evaluating the measurement report, thereby reducing the burden on the base station, improving the success rate of handovers, and effectively preventing link failures.

[0014] In one possible implementation, if the cell switching decision includes executing cell switching, after determining the cell switching decision, the method may also include: the source base station calls the second model to determine the first target base station based on the measurement report and the historical measurement report; the source base station sends a switching request message to the first target base station, and the switching request message includes the first measurement report, the warning level and report priority corresponding to the first measurement report, and the report priority corresponding to the first measurement report is higher than the report priority corresponding to other measurement reports; the source base station receives a switching response message from the first target base station, and the switching response message indicates that switching access is allowed.

[0015] In the above solution, when the source base station determines that a cell handover decision is to execute a cell handover, it can invoke a second model (e.g., an AI model) to search for the optimal target base station for the cell handover based on measurement reports and historical measurement reports. It can be appreciated that searching for and initiating a handover request to the optimal target base station improves the success rate of cell handovers and ensures call quality for the terminal device.

[0016] In one possible implementation, if the cell switching decision includes: calling auxiliary data related to subsequent cell switching decisions from the target base station, then after determining the cell switching decision, the method may also include: the source base station calls the second model to determine the second target base station based on the measurement report and the historical measurement report; the source base station sends a data request message to the second target base station, the data request message is used to call auxiliary data related to subsequent cell switching decisions, the data request message includes the second measurement report, the warning level and report priority corresponding to the second measurement report, and the report priority corresponding to the second measurement report is higher than the report priority corresponding to other measurement reports; the source base station receives a data response message from the second target base station, the data response message includes auxiliary data, and the auxiliary data is used to determine subsequent cell switching decisions.

[0017] In the above scheme, when the source base station determines that the current time is not the best time for cell switching, but switching may occur in the future, it enters the switching preparation mode. The source base station can call auxiliary data related to subsequent cell switching decisions from the target base station, thereby facilitating the formulation of subsequent cell switching decisions based on the auxiliary data.

[0018] In one possible implementation, the auxiliary data may include at least one of the following: the service quality of the second target base station, the network status of the second target base station, the cell identification information of the second target base station, and the credibility of switching from the source base station to the second target base station.

[0019] In one possible implementation, after receiving the auxiliary data from the second target base station, the method may further include: re-determining the cell switching decision based on the latest received measurement report, the warning level and report priority corresponding to the latest received measurement report, and the auxiliary data.

[0020] In the above scheme, compared with the cell switching decision made based on the measurement report, after obtaining the auxiliary data from the target base station, the source base station can integrate the auxiliary data, the latest received measurement report, the warning level and report priority corresponding to the latest received measurement report, and re-formulate a more accurate cell switching decision.

[0021] In one possible implementation, if the cell switching decision includes storing the measurement report in the source base station, then after determining the cell switching decision, the method may further include: storing the measurement report, and the warning level and report priority corresponding to the measurement report in the source base station.

[0022] In the above solution, when the source base station determines that handover will not occur in a short time, but the information obtained from the terminal device is of reference value, the source base station can store this information to prepare for subsequent handover decisions.

[0023] In a possible implementation, if the cell handover decision includes deleting the historical measurement report stored in the source base station, then after determining the cell handover decision, the method may further include: deleting the historical measurement report stored in the source base station.

[0024] In the above solution, when the source base station determines that no handover will occur within a short period of time and the information obtained from the terminal device is of low importance, the source base station can delete the information to release the occupied storage space.

[0025] In a third aspect, a handover decision determination method is provided. This method can be executed, for example, by a target base station, or by a component configured in the target base station (such as a circuit, chip, or chip system), or by a logic module or software capable of implementing all or part of the target base station's functions, although this application is not limited thereto. The following description uses the target base station (also referred to as the second target base station) as an example.

[0026] The method can comprise: receiving, by the target base station, a data request message from the source base station, the data request message comprising a measurement report, an early warning level corresponding to the measurement report, and a report priority, the early warning level indicating an urgency of cell switching of the terminal device, and the report priority indicating an importance of the early warning level; invoking, by the target base station, the third model to determine whether a switching requirement is met based on the measurement report, the early warning level corresponding to the measurement report, the report priority, and historical measurement reports stored in the target base station; and sending, by the target base station, a data response message to the source base station if the switching requirement is met, the data response message comprising auxiliary data for determining a subsequent cell switching decision.

[0027] In the above scheme, when the target base station receives the data request message from the source base station, if the target base station determines that the switching requirement is met based on the historical measurement reports and the currently received measurement report, the target base station can return the auxiliary data to the source base station. It can be understood that, by returning the auxiliary data to the source base station, the target base station can facilitate the source base station to fuse the auxiliary data, the latest received measurement report, the early warning level corresponding to the latest received measurement report, and the report priority, to make a more accurate cell switching decision, which can also reduce the burden of the source base station to some extent, improve the success rate of switching, and effectively avoid the occurrence of a failed link.

[0028] In a possible implementation, the target base station stores the measurement report for determining a subsequent cell switching decision. In the above scheme, since each base station provides network services for multiple terminal devices, the target base station is also a source base station of other terminal devices. After obtaining the measurement report, the target base station can also store the measurement report to facilitate making a subsequent cell switching decision.

[0029] In a fourth aspect, an electronic device is provided, which comprises a processing module and a communication module. The processing module is configured to: obtain a measurement report of a measurement object under RRC connection; and input the measurement report into a first model to obtain an early warning level corresponding to the measurement report and a report priority, the early warning level indicating an urgency of cell switching of the terminal device, and the report priority indicating an importance of the early warning level. The communication module is configured to: send the measurement report, the early warning level, and the report priority to a source base station, the measurement report, the early warning level, and the report priority being used to determine a cell switching decision.

[0030] In a fifth aspect, an electronic device is provided, which includes a processing module and a communication module. The communication module is used to: receive a measurement report from a terminal device, and an early warning level and a report priority corresponding to the measurement report, the early warning level is used to indicate the urgency of a cell switch of the terminal device, and the report priority is used to indicate the importance of the early warning level. The processing module is used to: determine a cell switching decision based on the measurement report, the early warning level and the report priority. The cell switching decision may include at least one of the following: executing a cell switch; calling auxiliary data related to a subsequent cell switching decision; storing a measurement report in a source base station, the measurement report being used to determine a subsequent cell switching decision; and deleting a historical measurement report stored in the source base station.

[0031] In a sixth aspect, a communication device is provided, which includes a communication module. The communication module is used to: receive a data request message from a source base station, and the data request message may include a measurement report, and an early warning level and a report priority corresponding to the measurement report, the early warning level is used to indicate the urgency of a cell switch of the terminal device, and the report priority is used to indicate the importance of the early warning level. The processing module is used to: call a third model based on the measurement report, the early warning level and the report priority corresponding to the measurement report, and the historical measurement report stored in the target base station to determine whether the switching requirement is met. The communication module is also used to: if the switching requirement is met, the target base station sends a data response message to the source base station, and the data response message includes auxiliary data, and the auxiliary data is used to determine subsequent cell switching decisions.

[0032] The fourth, fifth and sixth aspects are the device-side implementations corresponding to the first, second and third aspects. The explanations, supplements and descriptions of the beneficial effects of the first, second and third aspects also apply to the fourth, fifth and sixth aspects and will not be repeated here.

[0033] In a seventh aspect, a communication device is provided, comprising a processor. The processor is coupled to a memory and can be configured to execute instructions or data in the memory to implement the method of any possible implementation of the first, second, or third aspects described above. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

[0034] In one implementation, the communication interface may be a transceiver, or an input / output interface.

[0035] In another implementation, the communication device is a chip configured in a terminal device, a source base station, or a target base station. When the communication device is a chip configured in a terminal device, a source base station, or a target base station, the communication interface may be an input / output interface.

[0036] In an eighth aspect, a processor is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor executes the method in any possible implementation of any aspect.

[0037] In a specific implementation, the processor may be one or more chips, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, or various logic circuits. The input signal received by the input circuit may be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit may be, for example, but not limited to, output to and transmitted by a transmitter. The input circuit and the output circuit may be the same circuit, which functions as an input circuit and an output circuit at different times. The embodiments of the present application do not limit the specific implementation of the processor and various circuits.

[0038] In a ninth aspect, a communication device is provided, comprising a processor and a memory. The processor is configured to read instructions stored in the memory and receive signals via a receiver and transmit signals via a transmitter to execute the method of any possible implementation of any of the above aspects.

[0039] In a possible implementation, there are one or more processors and one or more memories.

[0040] In a tenth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instructions), which, when executed, enables a computer to execute a method in any possible implementation of any of the above aspects.

[0041] In an eleventh aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program (also referred to as code or instructions). When the computer-readable storage medium is executed, the computer executes the method in any possible implementation of any of the above aspects.

[0042] In a twelfth aspect, embodiments of the present application provide a chip system comprising one or more processors configured to retrieve and execute instructions stored in a memory, thereby executing the method of any of the above aspects or any possible implementations of each aspect. The chip system may be composed of a chip or may include a chip and other discrete devices.

[0043] Among them, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0044] In a thirteenth aspect, a communication system is provided, including the aforementioned terminal device, source base station, and target base station. In a possible implementation, the communication system may further include other devices that communicate with the terminal device, source base station, and / or target base station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of a communication system provided in this application;

[0046] Figure 2 A schematic diagram of a communication system under RRC connection provided by this application;

[0047] Figure 3 Schematic diagram of the five switching types provided for this application;

[0048] Figure 4 Schematic diagram of the inter-gNB handover process via Xn provided in this application;

[0049] Figure 5 A schematic diagram of an application scenario of the handover decision determination method of the present application;

[0050] Figure 6 A flowchart of a method for determining a handover decision in the present application;

[0051] Figure 7 A schematic diagram of the CNN of this application;

[0052] Figure 8 A flowchart of a method for executing a handover decision in the present application;

[0053] Figure 9 A flowchart of another method for executing a handover decision in the present application;

[0054] Figure 10 A flowchart of another method for executing a handover decision in the present application;

[0055] Figure 11 A flowchart of another method for executing a handover decision in the present application;

[0056] Figure 12 A schematic block diagram of an electronic device provided in this application;

[0057] Figure 13 This is a schematic block diagram of a communication device provided in this application. DETAILED DESCRIPTION

[0058] The terms "first" and "second" and the like in the description of the present application and in the claims of the present application are used for the purpose of differentiating different objects, or for the purpose of differentiating different treatments of the same object, rather than for the purpose of describing a specific order of the objects. In addition, the terms "comprise" and "have" and any variations thereof in the description of the present application are intended to cover the inclusions not exclusions. For example, a process, method, system, product or device that comprises a series of steps or units is not limited to the listed steps or units, but can optionally further comprise other steps or units that are not listed, or can optionally further comprise other steps or units that are inherent to the process, method, product or device. In the embodiments of the present application, "a plurality of" includes two or more. In the embodiments of the present application, the words "exemplary" or "for example" or the like are used to mean serving as an example, instance, or illustration. In addition, the network architecture and business scenarios described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that, as the network architecture evolves and new business scenarios appear, the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems.

[0059] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0060] The technical solutions provided in the embodiments of the present application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, general packet radio service (GPRS), wireless local area network (WLAN), long term evolution (LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD) system, sidelink communication system, universal mobile telecommunication system (UMTS), world-wide interoperability for microwave access (WiMAX) communication system, non-terrestrial network (NTN) communication system, fifth generation (5G) mobile communication system or new radio (NR) system, etc. Among them, the 5G mobile communication system can include non-standalone (NSA) and / or standalone (SA) networking. The technical solutions provided in the embodiments of the present application can also be applied to future communication systems, which are not limited by the embodiments of the present application.

[0061] Figure 1 A schematic diagram of a communication system 00 provided in an embodiment of the present application.

[0062] The communication system 00 may include network devices such as Figure 1 The network device 01 is shown. The communication system 00 may also include terminal devices, such as Figure 1 The terminal device 02 is shown. The network device 01 and the terminal device 02 can communicate via a wireless link.

[0063] Figure 1 The example shows a network device 01 and a terminal device 02. In a possible implementation, the communication system 00 may also include multiple network devices and / or multiple terminal devices.

[0064] The network devices in the embodiments of the present application may be network-side devices such as access network devices and core network devices. Access network devices are sometimes also referred to as access nodes. Access network devices have wireless transceiver functions and are used to communicate with terminal devices. Access network devices include, but are not limited to, base stations, evolved NodeBs (eNodeBs), Transmitter Relays (TRRPs), gNBs in 5G mobile communication systems, next-generation evolved NodeBs (ng-eNBs) in 5G mobile communication systems, access network devices or modules of access network devices in open access networks (ORAN) systems, satellites in NTN communication systems, base stations in future mobile communication systems, or access nodes in wireless fidelity (Wi-Fi) systems. Access network devices may also be modules or units that implement some of the functions of a base station. Access network devices may be macro base stations, micro base stations, indoor stations, relay nodes, donor nodes, or wireless controllers in cloud radio access network (CRAN) scenarios. Access network devices may also be servers, wearable devices, or in-vehicle devices. The multiple access network devices in a communication system can be base stations of the same type or different types. A base station can communicate with a terminal device directly or through a relay station. A terminal device can communicate with multiple base stations using different access technologies. The embodiments of this application do not limit the specific technology or device form factor used by the access network devices.

[0065] In practical applications, multiple network devices can collaborate to assist terminal devices in achieving wireless access, with different network devices each implementing portions of a base station's functionality. For example, a network device can be a centralized unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU). The CU and DU can be separate or included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or radio unit, such as a remote radio unit (RRU), an active antenna unit (AAU), or a remote radio head (RRH).

[0066] In the embodiments of the present application, the apparatus for implementing the function of a network device may be a network device, or may be a device capable of supporting the network device in implementing the function, such as a processor, circuit, chip, or chip system. The device may be installed in the network device or connected to the network device for use. In the technical solutions provided in the present application, the technical solutions provided in the present application are described using the network device as an example.

[0067] The terminal device in the embodiments of the present application may be a wireless terminal device capable of receiving network device scheduling and instruction information. A wireless terminal device may be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing device connected to a wireless modem. For example, the terminal device may communicate with one or more core networks or the Internet via a radio access network (RAN). The terminal device may also be referred to as a terminal, user equipment (UE), mobile station, or mobile terminal. The terminal device can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), the Internet of Things (IoT), ultra-reliable low-latency communication (URLLC), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, or satellite communication. The terminal device may be a mobile phone, tablet computer, computer with wireless transceiver function, wearable device, vehicle, aircraft (such as drone, helicopter, airplane), hot air balloon, ship, robot, robotic arm or smart home device, etc. The embodiments of the present application do not limit the form of the terminal device.

[0068] In the embodiments of the present application, the apparatus for implementing the functions of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device in implementing the functions, such as a processor, circuit, chip, or chip system. The apparatus may be installed in the terminal device or connected to the terminal device for use. In the technical solutions provided in the present application, the technical solutions provided in the present application are described using the terminal device as an example.

[0069] The access network equipment and / or the terminal equipment can be fixed or movable. The access network equipment and / or the terminal equipment can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; they can also be deployed on the water surface; they can also be deployed on airplanes, balloons and artificial satellites in the air. The embodiments of the present application do not limit the application scenarios of the access network equipment and the terminal equipment. The access network equipment and the terminal equipment can be deployed in the same scenario or different scenarios. For example, the access network equipment and the terminal equipment are deployed on land at the same time; or, the access network equipment is deployed on land and the terminal equipment is deployed on the water surface, etc., and no further examples are given.

[0070] Figure 2 A schematic diagram of a communication system under RRC connection provided in an embodiment of the present application.

[0071] The communication system can be applicable to 5G NR or evolved universal terrestrial radio access (E-UTRA). The communication system can include functional entities such as terminal equipment, access network equipment, and core network equipment. Each functional entity communicates through corresponding interfaces. Figure 2 As shown, terminal devices can communicate with each other via the proximity-based services communication 5 (PC5) interface, and the gNB or ng-eNB and terminal devices can communicate via the radio interface between UTRAN and UE (Uu interface). For example, a terminal device can connect to an access network device via the ng-eNB via the LTE-Uu interface. A terminal device can also connect to an access network device via the gNB via the NR-Uu interface.

[0072] Access network equipment is equipment in the access network, which is mainly used to implement functions such as resource scheduling, wireless resource management and wireless resource control of terminal equipment. For example, the access network can be Figure 2 The next generation radio access network (NG-RAN) shown in Figure 1 can include one or more access network devices, such as Figure 2In one possible implementation, the gNB can also be a TRP or a transmission measurement function (TMF), and the ng-eNB can also be a TRP or a transmission point (TP). Access network devices can communicate with core network devices via wired or wireless means, for example, Figure 2 The NG-C interface shown is connected to the core network. The radio access network is able to send positioning reference signals (PRS), receive sounding reference signals (SRS), and obtain related measurement information.

[0073] An access network device can cover one or more cells. For example, one access network device (e.g., ng-eNB) covers one cell, while another access network device (e.g., gNB) covers another cell. A terminal device can reside on the access network device in one of the cells and be in a connected state. Furthermore, the terminal device can transition from the connected state to an inactive state (i.e., a non-connected state) through the RRC release process. A terminal device in the non-connected state can remain in the original cell and conduct uplink and / or downlink transmissions with the access network device in the original cell based on the terminal device's transmission parameters in the original cell. A terminal device in the non-connected state can also move to a new cell and conduct uplink and / or downlink transmissions with the access network device in the new cell based on the terminal device's transmission parameters in the new cell.

[0074] Core network equipment is mainly used for network management, control and data transmission. Core network equipment may include Figure 2 The access and mobility management function (AMF), location management function (LMF) and other functional entities or network elements are shown.

[0075] The AMF can receive location service requests related to terminal devices from the location service (LCS) entity or other network elements of the 5G core network (5G core, 5GC), or the AMF itself can start some location services on behalf of specific terminal devices and forward the location service requests to the LMF.

[0076] The LMF is responsible for supporting different types of location services for terminal devices, calculating and feeding location information within the network, and providing functions such as positioning process management, terminal capability acquisition, assistance data provision, and terminal location estimation. Specifically, it supports terminal device location calculation, obtains downlink location measurements or estimates from terminal devices, and obtains uplink location measurements from the NG-RAN. The control plane and user plane of the LMF are the Enhanced-Serving Mobile Location Center (E-SMLC) and the Secure User Plane Locator Platform (SLP), respectively. The LMF can exchange signals with the NG-RAN and terminal devices. For example, the LMF and gNB or ng-eNB exchange information via New Radio Positioning Protocol Annex (NRPPa) messages, such as obtaining PRS and SRS configuration information, cell timing, and cell location information. Another example is the LMF and terminal devices exchange terminal device capability information, assistance information, and measurement information via LTE Positioning Protocol (LPP) messages.

[0077] It should be noted that Figure 2 This is just an illustrative framework diagram. Figure 2 The number of nodes, number of cells and status of terminal devices included in the system are not restricted. Figure 3 In addition to the functional nodes shown, other nodes may also be included, such as gateway devices, application servers, etc.

[0078] To facilitate understanding of the embodiments of the present application, the following briefly explains the terms used in the embodiments of the present application. Alternatively, reference may be made to the explanations in the 3rd Generation Partnership Project (3GPP) standard protocols for some of the terms. It should be understood that the technical terms used in the embodiments of the present application are intended only as examples and are not intended to be limiting. For example, as technology evolves, technical terms may also change. While other technical terms may have the same technical meaning, they should also apply to the present application.

[0079] In a mobile communication network, when a terminal device is in an RRC connected state, if it moves from one base station coverage area to another, or if call quality degrades due to external interference, it needs to switch from the original channel to another idle channel. This process is called HO.

[0080] Taking 5G networks as an example, when a terminal device roams or moves from one NR Node B (gNB) to another, a handover (HO) is required. HO is crucial for both data and voice session connections. Based on the routes involved in the handover, 5G networks typically include five types of handovers: intra-gNB handover, inter-gNB handover via Xn, inter-gNB handover via N2, inter-gNB-based inter-AMF N14 handover, and inter-RAT-based N26 handover.

[0081] For example, Figure 3 A schematic diagram showing five switching types.

[0082] like Figure 4 As shown in Figure 2, handover occurs within a gNB when a UE moves from one cell to another connected to the same gNB. Because the security termination point remains unchanged, there is no need to change the access stratum (AS) security algorithm during an intra-gNB handover. If the UE does not receive an indication of a new AS security algorithm during an intra-gNB handover, the UE can continue to use the same AS security algorithm as before.

[0083] When a UE is handed over between gNBs via the Xn interface from a source gNB to a target gNB, this handover is called an inter-gNB via Xn handover. Regarding security, the source gNB includes the UE security capabilities, such as the encryption and integrity algorithms used in the original cell, in the Handover Request message. The target gNB can select the highest-priority algorithm from the received UE security capabilities based on the locally configured algorithms.

[0084] When the source and target gNBs do not have an active Xn interface or handover is not allowed on the Xn interface, the gNBs may decide to perform handover on the N2 interface. This type of handover is called inter-gNB handover via N2. In this type of handover, the AMF plays the role of an anchor to coordinate between the source and target gNBs to make the handover successful.

[0085] 3GPP defines the N14 interface to connect two access and AMFs belonging to two different operators or serving two public land mobile networks (PLMNs). When the source gNB and target gNB are connected to different AMFs, handover can be triggered via the N14 interface.

[0086] In addition, to support inter-radio access technology (RAT) mobility, 3GPP defines the N26 interface that connects the 5G Advanced Mobile Function (AMF) to the 4G Mobility Management Entity (MME). When a carrier's 5G coverage is incomplete and the coverage gap is filled by 4G, the UE can perform a handover from 5G to 4G. This handover is called an inter-RAT-based N26 handover.

[0087] Generally, different handover types correspond to different handover procedures. To facilitate understanding of the handover procedure, the following uses inter-gNB handover via Xn as an example to illustrate the specific process of inter-gNB handover via Xn.

[0088] like Figure 3 As shown, the inter-gNB handover process via Xn includes the following steps 1 to 13.

[0089] Step 1: The source gNodeB sends a measurement control message to the UE via an RRC Reconfiguration message, which includes the measurement object (same frequency / inter-frequency), measurement report configuration, and measurement gap configuration.

[0090] Step 2: The UE responds with an RRCReconfigurationComplete message to the source gNodeB.

[0091] Step 3: The UE performs measurements based on the received measurement control message. After the UE measures and determines that the event condition is met, it reports a measurement report to the source gNodeB.

[0092] Accordingly, the source gNodeB makes a handover strategy and target cell / frequency decision based on the measurement results.

[0093] Step 4: The source gNodeB initiates a handover request (HandoverRequest) to the gNodeB where the selected target cell is located (ie, the target gNodeB).

[0094] Accordingly, after receiving the handover request, the target gNodeB performs admission control and allocates UE instances and transmission resources after allowing admission.

[0095] Step 5, the target gNodeB replies to the source gNodeB with a Handover Request Acknowledge, allowing the handover access. If there is a partial PDU Session handover access failure, the message needs to carry the failed protocol data unit (PDU) session list.

[0096] Step 6, the source gNodeB sends the UE a RRC Reconfiguration message, asking the UE to perform handover to the target cell.

[0097] Step 7, the source gNodeB sends the packet data convergence protocol (PDCP) sequence number (SN) to the target gNodeB through SN Status Transfer.

[0098] Step 8, the UE sends the target gNodeB a RRC Reconfiguration Complete message, and the UE air interface handover to the target cell is complete.

[0099] Step 9, the target gNodeB sends the AMF a Path Switch Request message to inform the UE that the cell has been changed, and the message contains the target cell identity and the converted PDU Session list. After receiving the message, the AMF updates the downlink general packet radio service tunneling protocol user plane (GPRS tunneling protocol user plane, GTPU), and modifies the GTPU address on the radio access network (RAN) side to the target gNodeB.

[0100] Step 10, the AMF replies to the target gNodeB with a Path Switch Request Acknowledge message. If the AMF indicates in the Path Switch Request Acknowledge message that the AMF failed to establish a PDU Session, the gNodeB deletes the PDU Session that failed to be established.

[0101] Step 11, the target gNodeB sends the source gNodeB a UE Context Release message, and the source gNodeB releases the user that has been handed over.

[0102] Step 12: After switching to the target cell, the target gNodeB sends a measurement control message to the UE via an RRC reconfiguration message.

[0103] Step 13: After receiving the new measurement control message from the target gNodeB, the UE replies with an RRCReconfigurationComplete message.

[0104] During the handover process, a terminal device continuously transmits its own measurement reports to the source base station according to the RRC protocol. The source base station evaluates these measurement reports to determine whether a handover is necessary and, if so, sends a handover request to the target base station. The source base station sequentially evaluates all measurement reports submitted by each terminal device, resulting in a heavy evaluation burden and a high risk of link failures.

[0105] In view of the above problems, an embodiment of the present application provides a switching decision determination solution. In the RRC connected network state, the terminal device collects measurement reports, and obtains the warning level and report priority for evaluating the measurement report based on the AI ​​model, and reports the measurement report, warning level and report priority to the source base station; the source base station formulates different cell switching decisions based on the measurement report, warning level and report priority, such as executing cell switching, calling auxiliary data related to subsequent cell switching decisions from the target base station, storing the measurement report in the source base station, and deleting the historical measurement reports stored in the source base station. By setting up an AI model in the terminal device, it can undertake part of the work of evaluating the measurement report, reducing the burden on the base station, improving the success rate of switching, and effectively avoiding the occurrence of failed links.

[0106] It should be noted that the present embodiment does not limit the handover type to which the above-mentioned handover decision determination scheme is applied. For example, the handover decision determination scheme can be applied to Figure 5 It is understood that the handover decision determination method is also applicable to other handover types in the future.

[0107] For example, Figure 5 A schematic diagram showing an application scenario of the switching decision determination solution provided in this application.

[0108] like Figure 6 As shown, the source base station covers the first cell, and the target base station covers the second cell. The signal strength in the area near the base station in the first and second cells is stronger, referred to as the mainstream area. The signal strength in the area far from the base station in the first and second cells is weaker, referred to as the edge area. After the terminal device establishes an RRC connection with the source base station, the terminal device performs measurements based on the measurement control message.

[0109] When the terminal device resides in the mainstream area of ​​the first cell, the signal quality of the cell indicated by the measurement report is good. The terminal device obtains the warning level and report priority corresponding to the measurement report based on the first model set in the terminal device. At this time, the warning level indicates that the urgency of the terminal device's cell switching is low, and the report priority indicates that the warning level is less important. The terminal device reports the measurement report, the warning level and report priority corresponding to the measurement report to the base station of the first cell (i.e., the source base station). The base station of the first cell evaluates these parameters and determines that switching is not necessary.

[0110] When the terminal device moves to the edge area of ​​the first cell, the signal quality of the cell indicated by the measurement report is poor. Based on the AI ​​model, the terminal device obtains the warning level and report priority corresponding to the measurement report. At this moment, the warning level indicates that the terminal device has a high degree of urgency for cell switching, and the report priority indicates that the warning level is of high importance. The terminal device reports the measurement report, the warning level and report priority corresponding to the measurement report to the base station of the first cell. The base station of the first cell evaluates these parameters and decides to perform cell switching. For example, the base station of the first cell can call the second model, select the second cell as the target cell based on the measurement report and historical measurement reports, and initiate a switching request to the base station where the second cell is located (i.e., the target base station).

[0111] After the terminal device switches to the second cell, the base station of the second cell becomes the source base station for the terminal device. The terminal device continues to obtain the warning level and report priority corresponding to the latest collected measurement report based on the first model, and reports the measurement report, the warning level and report priority corresponding to the measurement report to the source base station, and the source base station evaluates these parameters.

[0112] The above-mentioned scheme provided by the embodiment of the present application is described in detail below in conjunction with the corresponding flowchart. It can be understood that the schematic flowchart provided in the embodiment of the present application mainly uses different devices (such as terminal devices, source base stations, and target base stations) as the execution subjects of the interactive schematic to illustrate the method, but the present application does not limit the execution subjects of the interactive schematic. For example, the devices in the schematic flowchart (such as terminal devices, source base stations, and target base stations) may also be chips, chip systems, or processors that support the device to implement the method, or may be logic modules or software that can implement all or part of the functions of the device. For a unified explanation here, in the interactive process of the embodiment of the present application, the message or signaling interaction involved may adopt messages or signaling in the standard, or may be newly introduced messages or signaling, and the embodiment of the present application does not specifically limit this.

[0113] Figure 6 This is a flow chart of a method for determining a handover decision provided in an embodiment of the present application. It can be understood that Figure 1The terminal device in can be Figure 2 or Figure 6 The terminal device in the term "terminal device" may also refer to a device in the terminal device (such as a processor, chip, or chip system); Figure 1 The source base station in can be Figure 2 or Figure 6 The base station in the present invention may also refer to a device in the base station (such as a processor, chip, or chip system, etc.).

[0114] like Figure 7 As shown, the method may include the following S101 to S104.

[0115] S101, the terminal device obtains a measurement report of a measurement object under an RRC connection.

[0116] The measurement report may include the signal quality of the cell.

[0117] In conjunction with the description of steps 1 to 3 in the above embodiment, under the RRC connection, the source base station sends a measurement control message to the terminal device via an RRC reconfiguration message. The terminal device replies to the source base station with an RRC reconfiguration complete message and performs measurements based on the received measurement control message to obtain a measurement report. The measurement control message may include a measurement object, a report configuration, a measurement identifier, a quantity configuration, a measurement gap, and an effective measurement window.

[0118] The measurement objects mentioned above refer to the radio resources or signals that the terminal device needs to measure. Different types of measurements involve different resources or signals. Measurement objects help network devices determine which frequencies, times, and reference signals the terminal device needs to measure.

[0119] The above-mentioned reporting configuration defines how the terminal device reports the measurement results after completing the measurement, such as the conditions for triggering the report, the type of reference signal, the format of the report content, etc. In some embodiments, the reporting configuration can be periodic, such as reporting the measurement report every period. In other embodiments, the reporting configuration can also be triggered based on specific events.

[0120] The measurement identity can associate measurement object 1 (e.g., NR cell) with a reporting configuration (e.g., periodic reporting). Each measurement task has a unique identifier so that network devices can track reports and associate them with reporting configurations.

[0121] The above quantity configuration defines how to filter the measurement results and decide which measurement data should be retained or discarded, thereby ensuring the validity and accuracy of the measurement results.

[0122] The measurement gap and effective measurement window are used to ensure that the terminal device has sufficient time to perform the measurement task without interfering with other communication tasks or sessions.

[0123] Taking the NR signal strength periodic report as an example, the measurement control message is as follows:

[0124] Report trigger conditions: regular reporting;

[0125] Reference signal types: synchronization signal and physical broadcast channel (PBCH);

[0126] Report format: includes reference signal received power (RSRP) and reference signal receiving quality (RSRQ);

[0127] Reporting period: Report every 200 milliseconds;

[0128] Maximum number of cells: up to 4 cells can be reported;

[0129] Maximum number of beams per cell: A maximum of 3 beams can be reported per cell;

[0130] Report content: RSRP and RSRQ of each cell.

[0131] S102: The terminal device inputs the measurement report into the first model to obtain the warning level and report priority corresponding to the measurement report.

[0132] The first model is a lightweight artificial intelligence (AI) / machine learning (ML) model set in the terminal device, such as a convolutional neural network (CNN) model, a recurrent neural network (RNN) model, or a long short-term memory (LSTM) model. Taking the CNN model as an example, the CNN model may include an input layer, a convolutional layer, a pooling layer, a fully-connected layer, and an output layer. For example, Figure 5 A schematic diagram of a CNN model provided in this application.

[0133] For each measurement report collected by the terminal device under the RRC connection, the terminal device can perform the following steps: input each measurement report into the first model, the first model parses and predicts the measurement report, and outputs two parameters that match the measurement report: warning level , report priority Where t represents the time unit, such as time slot. In different time units, the warning level output by the first model is May vary, reporting priority It may also be different.

[0134] The above warning level It is used to represent the possibility of future switching for each measurement report and to indicate the urgency of cell switching for the terminal device. Figure 8 As shown, when the terminal device is located in an area close to the base station in the resident cell (i.e., the mainstream area), the signal strength in the mainstream area is strong. In this case, the possibility of switching in the future is low, and the warning level indicates that the urgency of the terminal device switching the cell is low; when the terminal device is located in an area far away from the base station in the resident cell (i.e., the edge area), the signal strength in the edge area is weak. In this case, the possibility of switching in the future is high, and the warning level indicates that the urgency of the terminal device switching the cell is high.

[0135] For example, Among them, A, B, C... are different scoring intervals, representing different warning levels. For example, ; A's score range is 90~100 points, with the highest warning level; B's score range is 80~90 points, with the second highest warning level; ... and so on, J's score range is 0~10 points, with the lowest warning level.

[0136] Priority of the above reports Represents the order of measurement reports, which is used to indicate the importance of the warning level. Among them, x is the priority of the impact report In some embodiments, x may include at least one of the following: similarity of data in measurement reports obtained at different times, geographic location of the terminal device, moving speed of the terminal device, moving direction of the terminal device, and predicted relationship between the moving direction of the terminal device and network performance trend.

[0137] Although the warning level Used to indicate the urgency of cell switching of terminal equipment, but in some scenarios, only relying on the warning level It may not be possible to make accurate cell handover decisions and priority reporting is required The auxiliary judgment is performed. For example, when the terminal device is located at the edge of the coverage signal of the base station, and the moving speed of the terminal device is very slow, a high warning level and a warning level with similar result size are generated in each time slot, and the report priority indicates that the emergency degree of the cell handover of the terminal device is low. For another example, when the terminal device is located at the edge of the coverage signal of the base station, and the terminal device moves towards the source base station, a high warning level and a warning level with similar result size are generated in each time slot, and the report priority indicates that the emergency degree of the cell handover of the terminal device is low. It can be understood that the warning level and the report priority The two parameters are used together, and the cell handover decision can be more accurately made.

[0138] S103, the terminal device sends the measurement report, the warning level corresponding to the measurement report, and the report priority to the source base station. Correspondingly, the source base station receives the measurement report, the warning level corresponding to the measurement report, and the report priority.

[0139] The measurement report, the warning level, and the report priority can be used to determine the cell handover decision.

[0140] In some embodiments, the measurement report is sent through the first signaling, and the warning level and the report priority are carried in the measurement report. Correspondingly, the source base station receives the first signaling. It can be understood that the warning level and the report priority carried in the measurement report can reduce the signaling overhead.

[0141] In another embodiment, the measurement report is sent through the first signaling, the warning level and the report priority are sent through the second signaling, and the first signaling and the second signaling are two signalings. Correspondingly, the source base station receives the first signaling and the second signaling. It can be understood that when two signalings are used, the warning level and the report priority are not limited by the sending time of the measurement report, and thus the transmission of information is more flexible.

[0142] S104, the source base station determines the cell handover decision according to the measurement report, the warning level, and the report priority.

[0143] The cell handover decision includes at least one of the following:

[0144] performing cell handover;

[0145] calling auxiliary data related to the subsequent cell handover decision from the target base station;

[0146] storing the measurement report in the source base station, and the measurement report is used to determine the subsequent cell handover decision;

[0147] The historical measurement reports stored in the source base station are deleted.

[0148] During the handover process, the source base station evaluates measurement reports to determine whether a handover is necessary. For example, if the RSRP and RSRQ values ​​in the measurement report meet the handover criteria, a handover request is sent to the base station in the target cell (i.e., the target base station). The source base station sequentially evaluates all measurement reports submitted by each terminal device, resulting in a heavy evaluation burden and a high risk of link failures. Furthermore, the source base station lacks real-time update and deletion capabilities for historical measurement reports, making handover decisions highly dependent on the source base station's evaluation system, which inadvertently increases the workload and complexity of the source base station.

[0149] In the solution of the present application, the terminal device can not only provide a measurement report to the source base station, but also provide an early warning level and a report priority corresponding to the measurement report, so that the source base station can combine these parameters to make the current cell switching decision. When the values ​​of the early warning level and the report priority are different, the cell switching decision made by the source base station is also different. It can be understood that the terminal device undertakes part of the work of evaluating the measurement report, thereby reducing the burden on the source base station, improving the success rate of the switching, and effectively avoiding the occurrence of failed links. In addition, the source base station can also predict whether a switch will occur in a short time based on the early warning level and the report priority, and based on this, the historical measurement reports are sorted out in real time, reducing the workload and difficulty of the source base station.

[0150] It should be noted that the above steps S101 to S104 describe the steps of handover preparation, which belong to the pre-handover process. After the source base station determines the cell handover decision, the source base station may also execute the corresponding cell handover decision.

[0151] The specific process of executing cell handover decision is described below by way of examples using four embodiments.

[0152] Example 1: No switching will occur in a short period of time and the information is of low importance.

[0153] In the first embodiment, the cell handover decision is to delete the historical measurement report stored in the source base station.

[0154] Figure 8 A flowchart of a method for executing a handover decision is provided in an embodiment of the present application.

[0155] like Figure 9 As shown, the method may include the following S201 to S205.

[0156] S201, the terminal device obtains a measurement report of a measurement object under an RRC connection.

[0157] S202, the terminal device inputs the measurement report into the first model to obtain a warning level and a report priority corresponding to the measurement report. The warning level The warning level is used to represent the possibility of future handover for each measurement report, and indicates the urgency of cell handover of the terminal device. The report priority The report priority is used to represent the order of the measurement report, and indicates the importance of the warning level.

[0158] S203, the terminal device sends the measurement report, the warning level and the report priority corresponding to the measurement report to the source base station. Correspondingly, the source base station receives the measurement report, the warning level and the report priority corresponding to the measurement report.

[0159] For specific implementation of S201 to S203, refer to the description of S101 to S103, which will not be repeated here.

[0160] S204, the source base station determines the cell handover decision as deleting the historical measurement report stored in the source base station according to the measurement report, the warning level and the report priority. The historical measurement report is a measurement report stored in the source base station and obtained before the measurement report obtained through S203.

[0161] S205, the source base station deletes the historical measurement report.

[0162] When the cell handover decision is to delete the historical measurement report stored in the source base station, the source base station can not store the measurement report obtained through S203. Of course, the source base station can also store the measurement report obtained through S203.

[0163] In some embodiments, the source base station also stores the warning level and the report priority corresponding to the historical measurement report. When the source base station organizes historical data, the warning level and the report priority corresponding to the historical measurement report can also be deleted.

[0164] It should be noted that S201 to S205 above are measurement actions in one period. After the source base station deletes the historical measurement report, the terminal device and the source base station still maintain the RRC connection, so in the next period the terminal device needs to continue to obtain the measurement report of the measurement object under the RRC connection, input the measurement report into the first model to obtain the warning level and the report priority corresponding to the measurement report, and send the measurement report, the warning level and the report priority corresponding to the measurement report to the source base station, so that the source base station can re-determine the cell handover decision according to the measurement report, the warning level and the report priority. Refer to the description of S101 to S104, which will not be repeated here.

[0165] In the above scheme, when the source base station determines that a handover will not occur in a short period of time based on the measurement report and the warning level and report priority corresponding to the measurement report, it indicates that the importance of the historical measurement reports obtained before this is low. Therefore, the source base station can sort out the historical measurement reports, delete the historical measurement reports, and update the current stored experience pool (for example, update the importance and warning threshold of the experience pool). The stored experience pool is used for training and prediction of the second model. For the second model, reference can be made to the description of the following embodiments three and four.

[0166] It should be noted that in Example 1, since no switching occurs, the terminal device maintains an RRC connection with the source base station, and the terminal device continues to obtain measurement reports of the measurement objects. Please refer to the descriptions of S101 to S104 above and will not be repeated here.

[0167] Example 2: Switching will not occur in a short period of time, but the information is of reference value.

[0168] In the second embodiment, the cell handover decision is to store the measurement report in the source base station.

[0169] Figure 9 A flowchart of another method for executing a handover decision is provided in an embodiment of the present application.

[0170] like Figure 10 As shown, the method may include the following S301 to S305.

[0171] S301, the terminal device obtains a measurement report of a measurement object under an RRC connection.

[0172] S302: The terminal device inputs the measurement report into the first model to obtain the warning level and report priority corresponding to the measurement report. Used to represent the possibility of future handover for each measurement report, indicating the urgency of cell handover for the terminal device. Report priority Represents the order of measurement reports, used to indicate the importance of warning levels.

[0173] S303: The terminal device sends the measurement report, the warning level and the report priority corresponding to the measurement report to the source base station. Correspondingly, the source base station receives the measurement report, the warning level and the report priority corresponding to the measurement report.

[0174] For the specific implementation of S301 to S303, please refer to the description of S101 to S103, which will not be repeated here.

[0175] S304: The source base station determines, based on the measurement report, the warning level, and the report priority, a cell switching decision as follows: storing the measurement report in the source base station.

[0176] S305: The source base station stores the measurement report, as well as the warning level and report priority corresponding to the measurement report.

[0177] When the cell handover decision is to store the measurement report in the source base station, the source base station may continue to store the historical measurement report, that is, not delete the historical measurement report. The historical measurement report is a measurement report obtained before the measurement report obtained in S303 and stored in the source base station.

[0178] It should be noted that the above S301 to S305 are measurement actions within one cycle. After the source base station stores the measurement report, the terminal device still maintains an RRC connection with the source base station. Therefore, in the next cycle, the terminal device needs to continue to obtain the measurement report of the measurement object under the RRC connection, and input the measurement report into the first model to obtain the warning level and report priority corresponding to the measurement report, and send the measurement report and the warning level and report priority corresponding to the measurement report to the source base station, so that the source base station can redetermine the cell switching decision based on the measurement report, the warning level and the report priority. Please refer to the description of S101 to S104 and will not repeat them here.

[0179] In the above scheme, when the source base station determines that a handover will not occur in a short period of time based on the measurement report and the warning level and report priority corresponding to the measurement report, but the currently obtained information has reference value, the source base station can save the measurement report obtained through S303. The measurement reports stored in sequence in the source base station can be used as historical data for future handover evaluation. In addition, the source base station can also update the current stored experience pool (for example, update the importance and warning threshold of the experience pool). The stored experience pool is used for training and prediction of the second model. For the second model, reference can be made to the description of the following embodiments three and four, which will not be repeated here.

[0180] Embodiment 3: If there is a possibility of switching in the future, switch to the standby mode.

[0181] In the third embodiment, the cell handover decision is to call auxiliary data related to the subsequent cell handover decision from the target base station.

[0182] Figure 10 A flowchart of another method for executing a handover decision is provided in an embodiment of the present application.

[0183] like Figure 11 As shown, the method may include the following S401 to S409.

[0184] S401, the terminal device obtains a measurement report of a measurement object under an RRC connection.

[0185] S402: The terminal device inputs the measurement report into the first model to obtain the warning level and report priority corresponding to the measurement report. Used to represent the possibility of future handover for each measurement report, indicating the urgency of cell handover for the terminal device. Report priority Represents the order of measurement reports, used to indicate the importance of warning levels.

[0186] S403: The terminal device sends the measurement report, the warning level and the report priority corresponding to the measurement report to the source base station. Correspondingly, the source base station receives the measurement report, the warning level and the report priority corresponding to the measurement report.

[0187] For the specific implementation of S401 to S403, please refer to the description of S101 to S103, which will not be repeated here.

[0188] S404: The source base station determines, based on the measurement report, the warning level, and the report priority, a cell handover decision as follows: calling auxiliary data related to subsequent cell handover decisions from the target base station.

[0189] S405 : The source base station calls the second model to determine a base station of a target cell (hereinafter referred to as a second target base station) based on the measurement report and the historical measurement reports.

[0190] The second model mentioned above is an AI / ML model set up in the source base station, such as a deep learning (Transformer) model. The Transformer model is essentially an encoder-decoder architecture. The encoding component consists of multiple layers of encoders, and the decoding component also consists of the same number of layers of decoders.

[0191] After the source base station determines that the cell switching decision is to call auxiliary data related to subsequent cell switching decisions from the target base station based on the measurement report, warning level and report priority, the source base station can perform the following steps: input the measurement report into the second model, the second model parses and predicts the measurement report and historical measurement reports, and outputs the base station of the target cell (i.e., the second target base station).

[0192] S406: The source base station sends a data request message to the second target base station, where the data request message is used to retrieve auxiliary data related to subsequent cell handover decision. Correspondingly, the second target base station receives the data request message from the source base station.

[0193] The data request message may include a second measurement report, a warning level corresponding to the second measurement report, and a report priority. The second measurement report is a measurement report stored in the source base station, and the report priority corresponding to the second measurement report is higher than the report priority corresponding to other measurement reports.

[0194] It is understood that the second measurement report can be the measurement report received through S403, or it can be a historical measurement report obtained before the measurement report. Sending the measurement report with the highest reporting priority to the second target base station can help the second target base station more accurately determine whether it is necessary to provide auxiliary data to the target base station.

[0195] S407 , the second target base station calls the third model to determine whether the handover requirement is met based on the second measurement report, the warning level and report priority corresponding to the second measurement report, and the historical measurement reports stored in the second target base station.

[0196] After the second target base station receives the data request message from the source base station, the second target base station may perform the following steps: input the second measurement report in the data request message, the warning level corresponding to the second measurement report, and the report priority, into a third model; the third model parses and predicts the second measurement report and historical measurement reports, and outputs a determination result. If the determination result is that the handover requirement is met, the second target base station executes S408 below; if the determination result is that the handover requirement is not met, the second target base station does not return a data response message to the source base station.

[0197] The third model is an AI / ML model set in the second target base station, such as a deep learning (transformer) model. For the deep learning model, reference can be made to the description of S405 above, which will not be repeated here.

[0198] In some embodiments, the auxiliary data may include at least one of the following: the quality of service of the second target base station, the network status of the second target base station, the cell identification information of the second target base station, and the reliability of the handover from the source base station to the second target base station. Of course, the auxiliary data may also include other possible data, which is not specifically limited in this application.

[0199] In some embodiments, the second target base station may further store the second measurement report received in S406 in the second target base station. The second measurement report, as a historical measurement report, may be used to determine a subsequent cell handover decision.

[0200] S408: If the handover requirement is met, the second target base station sends a data response message to the source base station. Correspondingly, the source base station receives the data response message from the second target base station.

[0201] The data response message may include auxiliary data, and the auxiliary data is used to determine a subsequent cell switching decision.

[0202] S409 : The source base station re-determines the cell switching decision based on the latest received measurement report, the warning level and report priority corresponding to the latest received measurement report, and the auxiliary data.

[0203] The re-determined cell handover decision includes at least one of the following:

[0204] Perform cell handover;

[0205] Retrieving auxiliary data related to subsequent cell handover decisions from the target base station;

[0206] Storing the measurement report in the source base station, where the measurement report is used to determine a subsequent cell handover decision;

[0207] The historical measurement reports stored in the source base station are deleted.

[0208] Compared to the cell switching decision determined by the source base station in S104 based on the measurement report, warning level, and report priority, the cell switching decision made by the source base station in S409 by integrating the auxiliary data, the latest received measurement report, the warning level corresponding to the latest received measurement report, and the report priority is more accurate. For the method of obtaining the latest received measurement report, the warning level corresponding to the latest received measurement report, and the report priority, please refer to the description of S101 to S103 and will not be repeated here.

[0209] In the above scheme, when the source base station determines that there is a possibility of switching in the future based on the measurement report and the warning level and report priority corresponding to the measurement report, it switches to the preparation mode. The source base station sends a data request message to the target base station. If the target base station determines that the switching requirements are met based on the historical measurement report and the currently received measurement report, the target base station can return auxiliary data to the source base station. It can be understood that by returning the auxiliary data to the source base station, the target base station can facilitate the source base station to integrate the auxiliary data, the latest received measurement report, the warning level and report priority corresponding to the latest received measurement report, and re-formulate a more accurate cell switching decision. This can also reduce the burden on the source base station to a certain extent, improve the success rate of switching, and effectively avoid the occurrence of failed links.

[0210] Embodiment 4: directly making a switching request.

[0211] In the third embodiment, the cell handover decision is to execute the cell handover.

[0212] Figure 11 A flowchart of another method for executing a handover decision is provided in an embodiment of the present application.

[0213] like Figures 1 to 11 As shown, the method may include the following S501 to S508.

[0214] S501, the terminal device obtains a measurement report of a measurement object under an RRC connection.

[0215] S502: The terminal device inputs the measurement report into the first model to obtain the warning level and report priority corresponding to the measurement report. Used to represent the possibility of future handover for each measurement report, indicating the urgency of cell handover for the terminal device. Report priority Represents the order of measurement reports, used to indicate the importance of warning levels.

[0216] S503: The terminal device sends the measurement report, the warning level and the report priority corresponding to the measurement report to the source base station. Correspondingly, the source base station receives the measurement report, the warning level and the report priority corresponding to the measurement report.

[0217] For the specific implementation of S401 to S403, please refer to the description of S101 to S103, which will not be repeated here.

[0218] S504: The source base station determines, based on the measurement report, the warning level, and the report priority, a cell handover decision: executing cell handover.

[0219] S505 : The source base station calls the second model to determine a base station of a target cell (hereinafter referred to as a first target base station) based on the measurement report and the historical measurement report.

[0220] The second model is an AI / ML model set in the source base station, such as a deep learning (transformer) model. For the deep learning model, please refer to the description of S405 above and will not be repeated here.

[0221] After the source base station determines that the cell switching decision is to perform cell switching based on the measurement report, warning level and report priority, the source base station can perform the following steps: input the measurement report into the second model, the second model parses and predicts the measurement report and historical measurement reports, and outputs the base station of the target cell (i.e., the first target base station).

[0222] S506: The source base station sends a handover request message to the first target base station. Correspondingly, the first target base station receives the handover request message from the source base station.

[0223] The handover request message may be used to request cell handover. The handover request message may include a first measurement report, the warning level corresponding to the first measurement report, and the report priority, wherein the report priority corresponding to the first measurement report is higher than the report priority corresponding to other measurement reports.

[0224] S507, the first target base station performs admission control, and allocates terminal device instances and transmission resources after allowing admission.

[0225] In some embodiments, the first target base station may also set up an AI / ML model. The above-mentioned handover request message may also include a measurement report, and an early warning level and a report priority corresponding to the measurement report. After the first target base station receives the handover request message, the first target base station may input the measurement report, and the early warning level and the report priority corresponding to the measurement report into the AI / ML model, so that the AI / ML model can determine whether to allow access based on this information and historical measurement reports.

[0226] S508: The first target base station returns a handover response message to the source base station. Accordingly, the source base station receives the handover response message from the first target base station.

[0227] The handover response message is used to indicate that handover access is allowed.

[0228] After the source base station receives the switching response message from the first target base station, the source base station can send an RRC reconfiguration message to the terminal device, requiring the terminal device to switch to the target cell where the first target base station is located. The terminal device can then initiate a path switching request. The specific implementation method can refer to the description of steps 6 to 13 in the above embodiment and will not be repeated here.

[0229] In the above solution, when the source base station determines, based on the measurement report and the warning level and report priority corresponding to the measurement report, that the current network environment is poor or that the terminal device is about to enter another coverage area, the source base station can determine that the cell handover decision is to immediately execute the cell handover and invoke the second model to search for the optimal target base station for the cell handover (such as the first target small cell) based on the measurement report and historical measurement reports. It can be understood that by searching for and initiating a handover request to the optimal target base station, the success rate of the cell handover is improved, ensuring the call quality of the terminal device.

[0230] It should be understood that Figures 1 to 11 The flowcharts or scenario diagrams shown are only for ease of understanding and are not intended to limit the embodiments of the present application to the examples shown in the diagrams. In fact, those skilled in the art will Figures 1 to 11 The examples in can be equivalently transformed to obtain more implementation methods.

[0231] Combined with the aboveFigures 12 to 13 , describes in detail the handover decision determination method provided by the embodiment of the present application. Figure 12 It should be understood that the communication device of the present invention can execute the various handover decision determination methods of the above embodiments of the present invention, that is, the specific working processes of the following various products can refer to the corresponding processes in the above method embodiments.

[0232] In the above embodiments, the LMF can execute some or all of the steps in each embodiment; the access network device can execute some or all of the steps in each embodiment. These steps or operations are only examples, and the embodiments of the present application can also execute other operations or variations of various operations. In addition, the various steps can be executed in different orders presented in the various embodiments, and it is possible that not all operations in the embodiments of the present application need to be executed. Moreover, the size of the sequence number of each step does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0233] Figure 12 is a schematic block diagram of an electronic device provided in an embodiment of the present application. The electronic device may be a communication device. Figure 13 As shown, the electronic device 120 may include a processing module 121 and a communication module 122. The processing module 121 may implement corresponding processing functions. The communication module 122 may implement corresponding communication functions, which may be internal communication functions of the electronic device 120 or communication functions between the electronic device 120 and other devices. Optionally, the communication module 122 may also be referred to as a communication interface or a communication module.

[0234] Optionally, the electronic device 120 further includes a storage module, which can be used to store instructions and / or data; the processing module 121 can read the instructions and / or data in the storage module, so that the electronic device 120 implements the aforementioned method embodiment.

[0235] In one possible implementation, the electronic device 120 may correspond to the terminal device in the above method embodiments, or a component configured in the terminal device (such as a circuit, chip, or chip system). The electronic device 120 can be used to execute the steps or processes executed by the terminal device in any of the above method embodiments.

[0236] Exemplarily, the processing module 121 is configured to: obtain a measurement report of a measurement object under an RRC connection; input the measurement report into a first model to obtain a warning level and a report priority corresponding to the measurement report, wherein the warning level is used to indicate the urgency of a cell handover for a terminal device, and the report priority is used to indicate the importance of the warning level. The communication module 122 is configured to: send the measurement report, the warning level, and the report priority to a source base station, wherein the measurement report, the warning level, and the report priority are used to determine a cell handover decision.

[0237] The above is only an example, and for detailed steps or processes, please refer to the description of the aforementioned embodiments.

[0238] In another possible implementation, the electronic device 120 may correspond to the source base station in the above method embodiments, or a component (such as a circuit, chip, or chip system) configured in the source base station. The electronic device 120 may be used to execute the steps or processes performed by the source base station in any of the above method embodiments.

[0239] Exemplarily, the communication module 122 is used to receive a measurement report from a terminal device, as well as an early warning level and a report priority corresponding to the measurement report, wherein the early warning level is used to indicate the urgency of a cell handover of the terminal device, and the report priority is used to indicate the importance of the early warning level. The processing module 121 is used to determine a cell handover decision based on the measurement report, the early warning level, and the report priority. The cell handover decision may include at least one of the following: executing a cell handover; calling auxiliary data related to a subsequent cell handover decision; storing the measurement report in the source base station, the measurement report being used to determine a subsequent cell handover decision; and deleting a historical measurement report stored in the source base station.

[0240] The above is only an example, and for detailed steps or processes, please refer to the description of the aforementioned embodiments.

[0241] In another possible implementation, the electronic device 120 may correspond to the target base station in the above method embodiments, or a component (such as a circuit, chip, or chip system) configured in the target base station. The electronic device 120 can be used to execute the steps or processes executed by the target base station in any of the above method embodiments.

[0242] Exemplarily, the communication module 122 is used to: receive a data request message from the source base station, where the data request message may include a measurement report, and an early warning level and a report priority corresponding to the measurement report, where the early warning level is used to indicate the urgency of a cell switch for the terminal device, and the report priority is used to indicate the importance of the early warning level. The processing module 121 is used to: call a third model to determine whether the switching requirements are met based on the measurement report, the early warning level and the report priority corresponding to the measurement report, and the historical measurement reports stored in the target base station. The communication module is also used to: if the switching requirements are met, the target base station sends a data response message to the source base station, where the data response message includes auxiliary data, and the auxiliary data is used to determine subsequent cell switching decisions.

[0243] The above is only an example, and for detailed steps or processes, please refer to the description of the aforementioned embodiments.

[0244] Figure 13 This is a schematic block diagram of a communication device 130 provided in an embodiment of the present application. The communication device 130 may be a terminal device, a chip, a chip system, or a processor that implements the above method at a source base station or a target base station. The communication device 130 may be used to implement the method described in the above method embodiment. For details, please refer to the description of the above method embodiment.

[0245] like ​ As shown, the communication device 130 may include one or more processors 131, which may also be referred to as processing units or processing modules, and may implement certain control functions. Processor 131 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, while the central processing unit may be used to control the communication device 130 (e.g., base station, baseband chip, user, user chip), execute software programs, and process software program data.

[0246] In a possible implementation, the processor 131 may also store instructions and / or data, and the instructions and / or data may be executed by the processor 131 so that the communication device 130 executes the method described in the above method embodiment.

[0247] In another possible implementation, the communication device 130 may include a communication interface 132 for implementing receiving and transmitting functions. For example, the communication interface 132 may be a transceiver circuit, an interface, an interface circuit, or a transceiver. The transceiver circuit, interface, interface circuit, or transceiver for implementing the receiving and transmitting functions may be separate or integrated. The transceiver circuit, interface, interface circuit, or transceiver may be used for reading and writing code / data, or may be used for transmitting or delivering signals.

[0248] Optionally, the communication device 130 may include one or more memories 133, which may store instructions. These instructions may be executed on the processor 131, causing the communication device 130 to perform the method described in the above method embodiment. Optionally, the memory 133 may also store data. Optionally, the processor 131 may also store instructions and / or data. The processor 131 and memory 133 may be provided separately or integrated together.

[0249] It should be understood that, in one possible implementation, each step in the method embodiment provided in the present application can be completed by an integrated logic circuit of hardware in a processor or by instructions in the form of software. The steps of the method disclosed in conjunction with the embodiments of the present application can be directly embodied as being executed by a hardware processor, or can be executed by a combination of hardware and software modules in the processor. The software module can be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in a memory, and the processor reads the information in the memory and completes the steps of the above method in conjunction with its hardware. To avoid repetition, it will not be described in detail here.

[0250] In one implementation, the communication device 130 may correspond to the terminal device in the above-mentioned method embodiment and may be used to execute the various steps and / or processes performed by the terminal device in the above-mentioned method embodiment. The processor 131 may be used to execute instructions stored in the memory 133, and when the processor 131 executes the instructions stored in the memory, the processor 131 is used to execute the various steps and / or processes of the above-mentioned method embodiment corresponding to the terminal device.

[0251] In another implementation, the communication device 130 may correspond to the source base station in the above method embodiment, and may be used to execute the various steps and / or processes performed by the source base station in the above method embodiment. The processor 131 may be used to execute instructions stored in the memory 133, and when the processor 131 executes the instructions stored in the memory, the processor 131 is used to execute the various steps and / or processes of the method embodiment corresponding to the source base station.

[0252] In another implementation, the communication device 130 may correspond to the target base station in the above-mentioned method embodiment, and may be used to execute the various steps and / or processes performed by the target base station in the above-mentioned method embodiment. The processor 131 may be used to execute instructions stored in the memory 133, and when the processor 131 executes the instructions stored in the memory, the processor 131 is used to execute the various steps and / or processes of the above-mentioned method embodiment corresponding to the target base station.

[0253] It should be understood that the processing device may be one or more chips. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0254] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0255] Based on the methods provided in the embodiments of the present application, the present application also provides a chip system, which includes one or more processors configured to retrieve and execute instructions stored in a memory, thereby executing the methods of the embodiments of the present application. The chip system can be composed of a chip or can include a chip and other discrete devices.

[0256] The chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0257] According to the method provided in the embodiment of the present application, the present application also provides a communication system, which includes the aforementioned LMF and access network equipment.

[0258] According to the method provided in the embodiments of the present application, the present application also provides a computer program product, which includes: computer program code, which, when the computer program code runs on a computer, enables the computer to execute the various steps or processes performed by the LMF and access network device in any of the aforementioned method embodiments.

[0259] According to the method provided in the embodiments of the present application, the present application also provides a computer-readable storage medium, which stores program code. When the program code runs on a computer, the computer executes the various steps or processes performed by the LMF and access network device in any of the aforementioned method embodiments.

[0260] The computer-readable storage medium may be the aforementioned volatile memory or non-volatile memory, or may include both volatile memory and non-volatile memory.

[0261] In the embodiments of this application, each term and English abbreviation is provided for convenience of description and shall not constitute any limitation to this application. This application does not exclude the possibility of defining other terms that can achieve the same or similar functions in existing or future agreements.

[0262] In the above embodiments, all or part of the embodiments may be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments may be implemented in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part.

[0263] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0264] It should be understood that in the various embodiments of the present application, the size of the serial number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0265] In short, the above is only a preferred embodiment of the technical solution of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A handover decision determination method, characterized in that: The method is applied to a terminal device, and the method includes: Obtaining a measurement report of a measurement object under a radio resource control connection; Inputting the measurement report into a first model to obtain a warning level and a report priority corresponding to the measurement report, wherein the warning level is used to indicate the urgency of cell switching of the terminal device, and the report priority is used to indicate the importance of the warning level; The measurement report, the warning level, and the report priority are sent to a source base station, where the measurement report, the warning level, and the report priority are used to determine a cell handover decision.

2. The method according to claim 1, characterized in that The reporting priority is determined based on at least one of the following: the similarity of data in measurement reports obtained at different times, the geographical location of the terminal device, the moving speed of the terminal device, the moving direction of the terminal device, and the predicted relationship between the moving direction of the terminal device and the network performance trend.

3. The method according to claim 1 or 2, characterized in that The measurement report includes the signal quality of the cell; The measurement report is sent through first signaling, and the warning level and the report priority are carried in the measurement report; or, the measurement report is sent through first signaling, and the warning level and the report priority are sent through second signaling.

4. A handover decision determination method, characterized in that: The method is applied to a source base station, and includes: receiving a measurement report, an early warning level, and a report priority from a terminal device, wherein the early warning level and the report priority are obtained based on the measurement report, the early warning level is used to indicate the urgency of a cell handover of the terminal device, and the report priority is used to indicate the importance of the early warning level; determining a cell handover decision based on the measurement report, the warning level, and the report priority; The cell handover decision includes at least one of the following: Perform cell handover; Retrieving auxiliary data related to subsequent cell handover decisions from the target base station; storing the measurement report at the source base station, where the measurement report is used to determine a subsequent cell handover decision; The historical measurement reports stored in the source base station are deleted.

5. The method according to claim 4, characterized in that The cell handover decision includes: executing cell handover; After determining the cell switching decision, the method further includes: Invoking a second model to determine a first target base station based on the measurement report and the historical measurement report; sending a handover request message to the first target base station, where the handover request message includes a first measurement report, the warning level corresponding to the first measurement report, and the report priority, where the report priority corresponding to the first measurement report is higher than the report priority corresponding to other measurement reports; A handover response message is received from the first target base station, where the handover response message indicates that handover access is allowed.

6. The method according to claim 4, characterized in that The cell handover decision includes: retrieving the auxiliary data related to the subsequent cell handover decision from the target base station; After determining the cell handover decision, the method further includes: Invoking a second model to determine a second target base station based on the measurement report and the historical measurement report; sending a data request message to the second target base station, where the data request message is used to call auxiliary data related to a subsequent cell handover decision, the data request message including a second measurement report, the warning level corresponding to the second measurement report, and the report priority, where the report priority corresponding to the second measurement report is higher than the report priority corresponding to other measurement reports; A data response message is received from the second target base station, where the data response message includes the auxiliary data, and the auxiliary data is used to determine a subsequent cell switching decision.

7. The method according to claim 6, characterized in that The auxiliary data includes at least one of the following: the service quality of the second target base station, the network status of the second target base station, the cell identification information of the second target base station, and the credibility of switching from the source base station to the second target base station.

8. The method according to claim 6 or 7, characterized in that After receiving the data response message from the second target base station, the method further includes: The cell switching decision is re-determined according to the most recently received measurement report, the warning level and the report priority corresponding to the most recently received measurement report, and the auxiliary data.

9. The method according to claim 4, characterized in that The cell handover decision includes: storing the measurement report in the source base station; after the cell handover decision is determined, the method further includes: The source base station stores the measurement report, as well as the warning level and report priority corresponding to the measurement report.

10. The method according to claim 4, characterized in that The cell handover decision includes: deleting the historical measurement report stored in the source base station; After determining the cell handover decision, the method further includes: The historical measurement report stored in the source base station is deleted.

11. A handover decision determination method, characterized in that: The method is applied to a target base station, and the method includes: Receiving a data request message from a source base station, the data request message including a measurement report, a warning level, and a report priority, where the warning level and the report priority are obtained based on the measurement report, the warning level is used to indicate the urgency of a cell handover of a terminal device, and the report priority is used to indicate the importance of the warning level; Invoking a third model to determine whether a handover requirement is met based on the measurement report, the warning level and the report priority corresponding to the measurement report, and a historical measurement report stored in the target base station; If the handover requirement is met, a data response message is sent to the source base station, where the data response message includes auxiliary data, and the auxiliary data is used to determine a subsequent cell handover decision.

12. The method according to claim 11, characterized in that The method further comprises: The measurement report is stored in the target base station, and the measurement report is used to determine a subsequent cell handover decision.

13. A device, characterized in that: The device includes at least one processor, which is coupled to a memory, wherein a program or instruction is stored in the memory, and the processor executes the program or instruction so that the device is used to perform the method according to any one of claims 1 to 3, or the method according to any one of claims 4 to 10, or the method according to any one of claims 11 to 12.

14. A communication system, characterized in that: The communication system includes a terminal device, a source base station and a target base station; The terminal device is used to execute the method as described in any one of claims 1 to 3, the source base station is used to execute the method as described in any one of claims 4 to 10, and the target base station is used to execute the method as described in any one of claims 11 to 12.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program or instructions, which, when executed, causes a computer to execute the method according to any one of claims 1 to 3, or the method according to any one of claims 4 to 10, or the method according to any one of claims 11 to 12.

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