Cell handover method, device, system and electronic device

Abstract

The present disclosure relates to a cell handover method, apparatus, system and electronic device, and relates to the field of communication technologies. The cell handover method includes: broadcasting first position change information of a cell coverage reference point of a current serving cell within a first preset time period to a terminal, so that the terminal determines whether to trigger cell handover according to the first position change information; and sending relevant information for performing cell handover to the terminal when the terminal determines to trigger cell handover, so that the terminal performs cell handover according to the relevant information. The technical solution of the present disclosure can avoid introducing a large overhead for broadcast message update.

Description

Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular, to a cell handover method, a cell handover device, a cell handover system, an electronic device, and a non-volatile computer-readable storage medium. Background Art

[0002] There are two types of beams in a low-earth orbit satellite NTN (Non-Terrestrial Network) network: quasi-ground fixed beams and ground mobile beams. Since the cell coverage range of the ground mobile beam changes in real time as the satellite moves, its coverage state change rate is higher.

[0003] In the related art, the NR (New Radio) Rel-17 (Release-17) NTN project supports broadcasting the real-time position of the cell coverage reference point of the quasi-ground fixed beam cell at each moment to support location-based conditional handover. Summary of the Invention

[0004] The inventors of the present disclosure found the following problems in the above-related technologies: For the case where the reference point position is not fixed, a large broadcast message update overhead will be introduced, resulting in a decline in communication performance.

[0005] In view of this, the present disclosure proposes a cell handover technical solution that can avoid introducing a large broadcast message update overhead.

[0006] According to some embodiments of the present disclosure, there is provided a cell handover method on the network side, including: broadcasting, to a terminal, first position change information of a cell coverage reference point of a current serving cell within a first preset time period, so that the terminal determines whether to trigger a cell handover according to the first position change information; and sending, to the terminal, relevant information for performing a cell handover in the case where the terminal determines to trigger a cell handover, so that the terminal performs a cell handover according to the relevant information.

[0007] In some embodiments, the first position change information is used to instruct the terminal to predict a first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines whether to trigger a cell handover according to the first real-time position.

[0008] In some embodiments, the first real-time position is used to instruct the terminal to determine a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal, and trigger a cell handover when the first distance is greater than a first threshold.

[0009] In some embodiments, the cell handover method on the network side further includes: when the terminal determines to trigger a cell handover, predicting candidate cells for the cell handover according to the location information of the terminal returned by the terminal, and the relevant information of the cell handover includes the configuration information of the candidate cells.

[0010] In some embodiments, the configuration information of the candidate cell includes the second position change information of the cell coverage reference point of the candidate cell within a second preset time period, so that the terminal can perform cell handover according to the second position change information and the first position change information.

[0011] In some embodiments, the first position change information is used to instruct the terminal to predict the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal can determine the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the location information of the terminal; the second position change information is used to instruct the terminal to predict the second real-time position of the cell coverage reference point of the candidate cell according to the second position change information, so that the terminal can determine the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the location information of the terminal, and perform cell handover according to the first distance and the second distance.

[0012] In some embodiments, the cell handover is performed when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0013] In some embodiments, predicting candidate cells for the cell handover includes: predicting candidate cells according to the signal quality of the neighboring cells of the current serving cell returned by the terminal and the location information of the terminal.

[0014] In some embodiments, the configuration information of the candidate cell includes radio resource configuration information.

[0015] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within a first preset time period, and the time information corresponding to each of the multiple first positions.

[0016] In some embodiments, the cell handover method on the network side further includes: when the terminal completes the cell handover, receiving a resource release message sent by the target cell of the cell handover.

[0017] In some embodiments, the cell handover method on the network side further includes: when the terminal sends replacement request information for a candidate cell for the cell handover, updating the configuration information of the candidate cell according to the number of times the candidate cell is requested to be replaced.

[0018] In some embodiments, the candidate cells include the candidate cells at the current moment, and updating the configuration information of the candidate cells includes: when the number of times of being requested to be replaced is less than a fourth threshold, updating the configuration information of the candidate cells at the current moment; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, updating the configuration information of the candidate cells at the current moment and the configuration information of the candidate cells at a future moment.

[0019] In some embodiments, the cell handover method on the network side further includes: when a handover request message is sent from a terminal, updating the number of times the candidate cell is requested to be replaced; when the number of times of being requested to be replaced is less than the fourth threshold, sending the updated number of times the candidate cell is requested to be replaced to the target cell of the cell handover.

[0020] In some embodiments, the cell handover method on the network side further includes: when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, resetting the number of times the candidate cell is requested to be replaced to zero.

[0021] In some embodiments, the handover request message includes radio measurement information of adjacent cells of the current serving cell.

[0022] In some embodiments, the cell handover method on the network side further includes: when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, updating the first position change information to the third position change information; sending a prompt message indicating that the first position change information has been updated to the terminal, so that the terminal receives the third position change information.

[0023] According to some other embodiments of the present disclosure, there is provided a cell handover method on the terminal side, including: determining whether to trigger a cell handover according to the first position change information of the cell coverage reference point of the current serving cell broadcast by the current serving cell within a first preset time period; when it is determined to trigger a cell handover, returning the position information of the terminal to the current serving cell; performing a cell handover according to the relevant information for performing a cell handover sent by the current serving cell.

[0024] In some embodiments, determining whether to trigger a cell handover includes: predicting the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information; determining whether to trigger a cell handover according to the first real-time position.

[0025] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within a first preset time period, and time information corresponding to each of the multiple first positions.

[0026] In some embodiments, determining whether to trigger a cell handover includes: determining a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal; triggering a cell handover when the first distance is greater than a first threshold.

[0027] In some embodiments, the relevant information for cell handover includes the configuration information of the candidate cells for cell handover, and the candidate cells are predicted by the current serving cell according to the position information of the terminal.

[0028] In some embodiments, the configuration information of the candidate cells includes the second position change information of the cell coverage reference point of the candidate cells within a second preset time period, and performing a cell handover includes: performing a cell handover according to the second position change information and the first position change information.

[0029] In some embodiments, performing a cell handover includes: predicting a first real-time position of the cell coverage reference point of the current serving cell according to the first position change information; determining a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal; predicting a second real-time position of the cell coverage reference point of the candidate cell according to the second position change information; determining a second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the position information of the terminal; performing a cell handover according to the first distance and the second distance.

[0030] In some embodiments, performing a cell handover includes: performing a cell handover when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0031] In some embodiments, the cell handover method on the terminal side further includes: when it is determined to trigger a cell handover, returning the signal quality of the neighboring cells of the current serving cell to the current serving cell, for assisting the current serving cell to predict candidate cells.

[0032] In some embodiments, the cell handover method on the terminal side further includes: when the channel quality of the candidate cells for cell handover cannot meet the preset conditions, sending a replacement request message for the candidate cells for cell handover to the current serving cell; receiving the updated configuration information of the candidate cells sent by the current serving cell, and the configuration information of the candidate cells is updated according to the number of times the candidate cells are requested to be replaced.

[0033] In some embodiments, the replacement request message includes the radio measurement information of the neighboring cells of the current serving cell.

[0034] In some embodiments, the candidate cells include the candidate cells at the current moment. The configuration information of the candidate cells is updated through the following steps: when the number of times of being requested to be replaced is less than the fourth threshold, the configuration information of the candidate cells at the current moment is updated; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the configuration information of the candidate cells at the current moment and the configuration information of the candidate cells at a future moment are updated.

[0035] In some embodiments, the cell handover method on the terminal side further includes: when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, receiving a prompt message that the first position change information corresponding to the current serving cell is updated, and the first position change information is updated to the third position change information; according to the prompt message, receiving the third position change information.

[0036] According to still some other embodiments of the present disclosure, there is provided a cell handover device on the network side, including: a sending unit, configured to broadcast, to a terminal, first position change information of a cell coverage reference point of a current serving cell within a first preset time period, so that the terminal determines whether to trigger a cell handover according to the first position change information, and when the terminal determines to trigger a cell handover, sending relevant information for performing a cell handover to the terminal, so that the terminal performs a cell handover according to the relevant information.

[0037] In some embodiments, the first position change information is used to instruct the terminal to predict a first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines whether to trigger a cell handover according to the first real-time position.

[0038] In some embodiments, the first real-time position is used to instruct the terminal to determine a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal, and trigger a cell handover when the first distance is greater than a first threshold.

[0039] In some embodiments, the cell handover device on the network side further includes: a prediction unit, configured to, when the terminal determines to trigger a cell handover, predict candidate cells for the cell handover according to the position information of the terminal returned by the terminal, and the relevant information for the cell handover includes the configuration information of the candidate cells.

[0040] In some embodiments, the configuration information of the candidate cells includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period, so that the terminal performs a cell handover according to the second position change information and the first position change information.

[0041] In some embodiments, the first location change information is used to instruct the terminal to predict the first real-time location of the cell coverage reference point of the current serving cell according to the first location change information, so that the terminal can determine the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time location and the location information of the terminal; the second location change information is used to instruct the terminal to predict the second real-time location of the cell coverage reference point of the candidate cell according to the second location change information, so that the terminal can determine the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time location and the location information of the terminal, and perform cell handover according to the first distance and the second distance.

[0042] In some embodiments, the cell handover is performed when the first distance is greater than the second threshold and the second distance is less than the third threshold.

[0043] In some embodiments, the prediction unit predicts candidate cells according to the signal quality of the neighboring cells of the current serving cell returned by the terminal and the location information of the terminal.

[0044] In some embodiments, the configuration information of the candidate cell includes radio resource configuration information.

[0045] In some embodiments, the first location change information includes multiple first locations of the cell coverage reference point of the current serving cell within a first preset time period, and the time information corresponding to each of the multiple first locations.

[0046] In some embodiments, the cell handover device on the network side further includes: a receiving unit, configured to receive a resource release message sent by the target cell of the cell handover when the terminal completes the cell handover.

[0047] In some embodiments, the cell handover device on the network side further includes: an updating unit, configured to update the configuration information of the candidate cell according to the number of times the candidate cell is requested to be replaced when the terminal sends replacement request information for the candidate cell for cell handover.

[0048] In some embodiments, the candidate cell includes the candidate cell at the current moment. When the number of times of being requested to be replaced is less than the fourth threshold, the updating unit updates the configuration information of the candidate cell at the current moment; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the updating unit updates the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at a future moment.

[0049] In some embodiments, when the terminal sends replacement request information, the updating unit updates the number of times the candidate cell is requested to be replaced; when the number of times of being requested to be replaced is less than the fourth threshold, the sending unit sends the updated number of times the candidate cell is requested to be replaced to the target cell of the cell handover.

[0050] In some embodiments, when the number of times the candidate cell is requested to be replaced is greater than or equal to a fourth threshold, the update unit resets the number of times the candidate cell is requested to be replaced to zero.

[0051] In some embodiments, the handover request information includes radio measurement information of neighboring cells of the current serving cell.

[0052] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, the update unit updates the first position change information to the third position change information; the sending unit sends a prompt message indicating that the first position change information has been updated to the terminal, so that the terminal receives the third position change information.

[0053] According to still some embodiments of the present disclosure, there is provided a cell handover device on the terminal side, including: a determination unit, configured to determine whether to trigger a cell handover according to the first position change information of the cell coverage reference point of the current serving cell broadcast within a first preset time period; a sending unit, configured to return the position information of the terminal to the current serving cell when it is determined to trigger a cell handover; a handover unit, configured to perform a cell handover according to the relevant information for performing a cell handover sent by the current serving cell.

[0054] In some embodiments, the determination unit predicts the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information; and determines whether to trigger a cell handover according to the first real-time position.

[0055] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within a first preset time period, and time information corresponding to each of the multiple first positions.

[0056] In some embodiments, the determination unit determines the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal; the handover unit triggers a cell handover when the first distance is greater than a first threshold.

[0057] In some embodiments, the relevant information for cell handover includes configuration information of candidate cells for cell handover, and the candidate cells are predicted by the current serving cell according to the position information of the terminal.

[0058] In some embodiments, the configuration information of the candidate cell includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period, and the handover unit performs a cell handover according to the second position change information and the first position change information.

[0059] In some embodiments, the handover unit predicts the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, determines the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal, predicts the second real-time position of the cell coverage reference point of the candidate cell according to the second position change information, determines the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the position information of the terminal, and performs cell handover according to the first distance and the second distance.

[0060] In some embodiments, the handover unit performs cell handover when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0061] In some embodiments, when determining that cell handover is triggered, the sending unit returns the signal quality of the neighboring cells of the current serving cell to the current serving cell, which is used to assist the current serving cell in predicting candidate cells.

[0062] In some embodiments, when the channel quality of the candidate cell for cell handover fails to meet the preset conditions, the sending unit sends replacement request information for the candidate cell for cell handover to the current serving cell. The cell handover device on the terminal side further includes a receiving unit, which is configured to receive the updated configuration information of the candidate cell sent by the current serving cell, and the configuration information of the candidate cell is updated according to the number of times the candidate cell is requested to be replaced.

[0063] In some embodiments, the replacement request information includes the radio measurement information of the neighboring cells of the current serving cell.

[0064] In some embodiments, the candidate cell includes the candidate cell at the current moment, and the update of the configuration information of the candidate cell is performed through the following steps: when the number of times of being requested to be replaced is less than a fourth threshold, the configuration information of the candidate cell at the current moment is updated; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at the future moment are updated.

[0065] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, the receiving unit receives a prompt message that the first position change information is updated, the first position change information is updated to the third position change information, and according to the prompt message, the receiving unit receives the third position change information.

[0066] According to some further embodiments of the present disclosure, there is provided a cell handover system, including: a first cell handover device configured to perform the cell handover method on the terminal side in any of the above embodiments; and a second cell handover device configured to perform the cell handover method on the network side in any of the above embodiments.

[0067] According to some further embodiments of the present disclosure, there is provided an electronic device, including: a memory; and a processor coupled to the memory, the processor being configured to execute, based on instructions stored in the memory device, the cell handover method on the network side or the cell handover method on the terminal side in any of the above embodiments.

[0068] According to some further embodiments of the present disclosure, there is provided a non-volatile computer-readable storage medium having stored thereon a computer program, which when executed by a processor implements the cell handover method on the network side or the cell handover method on the terminal side in any of the above embodiments.

[0069] In the above embodiments, the network side broadcasts the trajectory change information of the cell coverage reference point, so that the terminal can decide whether to trigger cell handover based on this information. In this way, not only can cell handover be achieved without introducing a large overhead for updating broadcast messages, but also the accuracy and robustness of cell handover can be improved, thereby improving communication performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] The drawings forming a part of the specification depict embodiments of the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0071] Referring to the drawings, the present disclosure can be more clearly understood from the following detailed description:

[0072] Figure 1 A flowchart showing some embodiments of the cell handover method of the present disclosure;

[0073] Figure 2a A schematic diagram showing some embodiments of the ground mobile beam satellite cell of the present disclosure;

[0074] Figure 2b A signaling diagram showing some embodiments of the cell handover method of the present disclosure;

[0075] Figure 2c A flowchart showing some other embodiments of the cell handover method of the present disclosure;

[0076] Figure 2d A flowchart showing some further embodiments of the cell handover method of the present disclosure;

[0077] Figure 3 A flowchart showing some still further embodiments of the cell handover method of the present disclosure;

[0078] Figure 4a Block diagram showing some embodiments of the cell handover device of the present disclosure;

[0079] Figure 4b Block diagram showing other embodiments of the cell handover device of the present disclosure;

[0080] Figure 5 Block diagram showing some embodiments of the electronic device of the present disclosure;

[0081] Figure 6 Block diagram showing other embodiments of the electronic device of the present disclosure;

[0082] Figure 7 Block diagram showing some embodiments of the cell handover system of the present disclosure. Detailed implementation manners

[0083] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure.

[0084] Meanwhile, it should be understood that, for the sake of convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationship.

[0085] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation to the present disclosure and its application or use.

[0086] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0087] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0088] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0089] As described above, adding cell coverage reference point information to the broadcast message of the quasi-ground fixed beam cell can support location-based quasi-ground fixed beam conditional handover. However, for ground mobile beams, since the position of the cell coverage reference point is not fixed, if the real-time position information of the broadcast cell coverage reference point is introduced, a large broadcast message update overhead will be incurred. Therefore, the above method does not support location information-based ground mobile beam conditional handover.

[0090] In view of the above technical problems, according to the characteristics of a terrestrial mobile beam satellite cell, the present disclosure enables a terminal to predict changes in the cell coverage reference point based on network-side broadcast messages, so that the terminal can obtain the real-time position of the cell coverage reference point, and then trigger a conditional handover based on the position information. In this way, the accuracy and robustness of the handover of the terrestrial mobile beam satellite cell can be improved.

[0091] For example, the technical solution of the present disclosure can be implemented through the following embodiments.

[0092] Figure 1 A flowchart showing some embodiments of the cell handover method of the present disclosure.

[0093] As Figure 1 shown, in step 110, first position change information of the cell coverage reference point (Reference point) of the current serving cell within a first preset time period is broadcast to the terminal, so that the terminal determines whether to trigger a cell handover according to the first position change information.

[0094] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within the first preset time period, and time information corresponding to each of the multiple first positions.

[0095] For example, the first position change information is trajectory change information, and the current serving cell is a terrestrial mobile beam satellite cell. The terrestrial mobile beam satellite cell broadcasts the trajectory change information of its cell coverage reference point. The trajectory change information may include a list of the cell coverage reference point positions and their corresponding relationships with time.

[0096] In some embodiments, the first position change information is used to instruct the terminal to predict the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines whether to trigger a cell handover according to the first real-time position.

[0097] For example, the first real-time position is used to instruct the terminal to determine the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal, and trigger a cell handover when the first distance is greater than a first threshold.

[0098] For example, the terminal calculates the distance between the terminal and the cell coverage reference point of the current serving cell according to the trajectory change information of the cell coverage reference point, the ephemeris information corresponding to the current serving cell, and the position information of the terminal; when the distance is greater than the first threshold, it triggers the process of reporting measurement to the current serving cell.

[0099] For example, the content of the measurement report may include the location information of the terminal and the signal quality of the neighboring cells of the current serving cell.

[0100] In step 120, when the terminal determines that a cell handover is triggered, relevant information for cell handover is sent to the terminal so that the terminal can perform cell handover according to the relevant information.

[0101] In some embodiments, when the terminal determines that a cell handover is triggered, candidate cells for the cell handover are predicted based on the location information of the terminal returned by the terminal, and the relevant information for cell handover includes the configuration information of the candidate cells.

[0102] For example, the network side (such as the current serving cell) sends a conditional handover configuration (such as relevant information for cell handover) to the terminal according to the content of the measurement report.

[0103] In some embodiments, the configuration information of the candidate cells includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period, so that the terminal can perform cell handover according to the second position change information and the first position change information.

[0104] For example, the network side can predict multiple candidate cells based on ephemeris information and the location information of the terminal, and send a conditional handover configuration. The conditional handover configuration may include radio resource configuration information and trajectory change information of the candidate cells (such as second position change information of the cell coverage reference point of the candidate cell within a second preset time period).

[0105] In some embodiments, the first position change information is used to indicate that the terminal predicts the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal can determine the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the location information of the terminal.

[0106] In some embodiments, the second position change information is used to indicate that the terminal predicts the second real-time position of the cell coverage reference point of the candidate cell according to the second position change information, so that the terminal can determine the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the location information of the terminal, and perform cell handover according to the first distance and the second distance.

[0107] For example, the cell handover is performed when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0108] For example, in the case where there are multiple candidate cells, the terminal accesses the candidate cells in sequence according to the conditional handover configuration. The execution conditions for this step may include: the terminal predicts the changes in the positions of the cell coverage reference points of the current serving cell and the candidate cells over time based on the trajectory change information (such as the real-time positions of the cell coverage reference points of the current serving cell and the candidate cells at the current moment); when the distance between the terminal and the cell coverage reference point of the current serving cell is greater than a second threshold and the distance between the terminal and the cell coverage reference point of the candidate cell is less than a third threshold, conditional handover is executed to switch the terminal to the target cell (such as this candidate cell).

[0109] In some embodiments, the configuration information of the candidate cell includes radio resource configuration information.

[0110] In some embodiments, candidate cells are predicted based on the signal quality of the neighboring cells of the current serving cell returned by the terminal and the position information of the terminal.

[0111] In some embodiments, when the terminal has completed a cell handover, a resource release message sent by the target cell of the cell handover is received.

[0112] For example, when the terminal performs multiple handovers, that is, in the case of including multiple target cells, the target cells sequentially send resource release messages to the source cell of the cell handover.

[0113] In some embodiments, when the terminal sends replacement request information for a candidate cell for cell handover, the configuration information of the candidate cell is updated according to the number of times the candidate cell is requested to be replaced. For example, the replacement request information includes radio measurement information of the neighboring cells of the current serving cell.

[0114] For example, for a certain candidate cell, when the requirements for its channel quality cannot meet the execution requirements of conditional handover, the terminal sends a replacement request message for this candidate cell to the current serving cell. The replacement request message may include a radio measurement report performed by the neighboring cells of the current serving cell; the network side maintains the conditional handover configuration and updates the counter of this candidate cell, and each time a replacement request message for this candidate cell is received, the value of the counter is incremented by one.

[0115] In some embodiments, the candidate cells include the candidate cells at the current moment. When the number of times of being requested to be replaced is less than a fourth threshold, the configuration information of the candidate cells at the current moment is updated; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the configuration information of the candidate cells at the current moment and the configuration information of the candidate cells at future moments are updated.

[0116] In some embodiments, when a replacement request message is sent from a terminal, the number of times the candidate cell is requested to be replaced is updated; when the number of times requested to be replaced is less than a fourth threshold, the updated number of times the candidate cell is requested to be replaced is sent to the target cell for cell handover.

[0117] For example, when the counter value is less than the fourth threshold, the network side only updates the configuration of the candidate cell that should be accessed at the current moment; when the counter value is greater than or equal to the fourth threshold, the network side updates the configuration of the candidate cells at the current moment and in the future.

[0118] In some embodiments, when the number of times requested to be replaced is greater than or equal to the fourth threshold, the number of times the candidate cell is requested to be replaced is reset to zero.

[0119] For example, when only the configuration of the candidate cell accessed at the current moment is updated, the value of the counter of this candidate cell is passed to the target cell along with the cell handover; when the configuration of the candidate cells at the current moment and in the future is updated, the counter of this candidate cell is reset to zero, and the target cell starts to maintain this counter again.

[0120] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, the first position change information is updated to the third position change information; a prompt message indicating that the first position change information has been updated is sent to the terminal so that the terminal can receive the third position change information.

[0121] For example, a terrestrial mobile beam satellite cell broadcasts the trajectory change information of its cell coverage reference point information; when the satellite corresponding to the terrestrial mobile beam satellite cell moves to the farthest point position of the trajectory change information, a trajectory change information update process is triggered; the satellite broadcasts the updated trajectory change information and updates the valueTag value in the SIB1 (System Information Block) message, and the updated valueTag value is used to indicate to the terminal that the trajectory change information has been updated and needs to be received again; when the terminal receives that the valueTag value in the broadcast message has changed, it receives the updated trajectory change information in the broadcast message again.

[0122] Figure 2a A schematic diagram showing some embodiments of the terrestrial mobile beam satellite cell of the present disclosure.

[0123] As Figure 2a shown, satellite A and satellite B respectively correspond to different terrestrial mobile beam satellite cells. The terminal is located in the overlapping area of the two terrestrial mobile beam satellite cells, that is, the handover area.

[0124] The coverage area of a satellite cell with a ground moving beam always changes as the satellite moves. If the cell coverage reference point information is broadcast in real time, a large overhead for updating broadcast messages will be introduced. Therefore, it is necessary for the network side to provide relevant auxiliary information so that the terminal can accurately infer the position of the cell coverage reference point, and then achieve accurate conditional handover based on the position information.

[0125] In some embodiments, the network side can broadcast the trajectory change information of the cell coverage reference point. Based on this information, the terminal infers the real-time position of the cell coverage reference point and triggers a conditional handover. In this way, the accuracy and robustness of the handover of the satellite cell with a ground moving beam can be improved.

[0126] For example, first, the network side broadcasts the trajectory change information of the cell coverage reference point, indicating the change of the cell coverage reference point over time within a period of time; second, the terminal determines whether it is at the edge of the cell based on the real-time position of the cell coverage reference point predicted according to the broadcast message, and then determines whether to trigger a measurement report; then, the network side predicts multiple candidate target cells based on the terminal position reported by the terminal, and in the conditional handover configuration, sends the trajectory change information of the cell coverage reference point of the candidate cell to the terminal; finally, the terminal predicts the position change of the cell coverage reference point of the candidate cell based on this information and autonomously triggers the execution of the conditional handover.

[0127] Figure 2b A signaling diagram showing some embodiments of the cell handover method of the present disclosure.

[0128] As Figure 2b shown, in event 210b, the satellite cell with a ground moving beam (i.e., the current serving satellite) broadcasts the trajectory change information of its cell coverage reference point. The trajectory change information may include a list of the position of the cell coverage reference point and its correspondence with time.

[0129] In event 220b, the terminal calculates the distance between the terminal and the cell coverage reference point of the current serving cell according to the trajectory change information of the cell coverage reference point, the ephemeris information corresponding to the current serving cell, and the position information of the terminal; when the distance is greater than a first threshold (threshold 1), the process of triggering a measurement report to the current serving cell is started.

[0130] In event 230b, the terminal reports measurements to the serving satellite. For example, the content of the measurement report may include the position information of the terminal and the signal quality of the neighboring cells of the current serving cell.

[0131] In event 240b, the serving satellite can predict multiple candidate cells according to the ephemeris information and the position information of the terminal.

[0132] In event 250b, the serving satellite sends a handover request to candidate satellite 1 corresponding to candidate cell 1 and candidate satellite 2 corresponding to candidate cell 2, and receives handover responses from candidate satellite 1 and candidate satellite 2.

[0133] In step 260b, the serving satellite distributes conditional handover configurations. The conditional handover configurations may include radio resource configuration information and trajectory change information of the candidate cells.

[0134] In step 270b, the terminal accesses the candidate cells in sequence according to the conditional handover configurations. The execution conditions for this step may include: the terminal predicts the change of the positions of the cell coverage reference points of the current serving cell and the candidate cells over time according to the trajectory change information; when the distance between the terminal and the cell coverage reference point of the current serving cell is greater than a second threshold (threshold 2), and the distance between the terminal and the cell coverage reference point of the candidate cell is less than a third threshold (threshold 3), conditional handover is executed to switch the terminal to the target cell.

[0135] In step 280b, when the terminal is located at position L1, the distance between the terminal and the cell coverage reference point of the serving satellite is greater than the second threshold, and the distance between the terminal and the cell coverage reference point of candidate satellite 1 is less than the third threshold, the terminal is switched to the cell of candidate satellite 1.

[0136] When the terminal is located at position L2, the distance between the terminal and the cell coverage reference point of the serving satellite is greater than the second threshold, and the distance between the terminal and the cell coverage reference point of candidate satellite 2 is less than the third threshold, the terminal is switched to the cell of candidate satellite 2.

[0137] In this way, the terminal can perform autonomous handover without frequent measurement reporting and configuration, thereby improving the efficiency of cell handover and communication performance.

[0138] Figure 2c A flowchart showing some other embodiments of the cell handover method of the present disclosure.

[0139] As Figure 2c shown, in step 210c, the terminal determines that the channel quality of a certain candidate cell cannot meet the execution requirements for conditional handover.

[0140] In step 220c, the terminal sends a replacement request message for this candidate cell to the current serving cell. The replacement request message may include a radio measurement report of the neighboring cells of the current serving cell.

[0141] In step 230c, the network side maintains the conditional handover configuration and updates the counter of this candidate cell. Each time a replacement request message for this candidate cell is received, the value of the counter is incremented by one.

[0142] In step 240c, it is determined whether the value of the counter is greater than or equal to a fourth threshold (i.e., threshold 4). If it is greater, step 250c is executed; if it is less, step 270c is executed.

[0143] In step 250c, the network side updates the configuration of candidate cells at the current time and later times.

[0144] In step 260c, the counter of the candidate cell is reset to zero, and the target cell resumes maintaining the counter.

[0145] In step 270c, the network side only updates the configuration of the candidate cell that should be accessed at the current time.

[0146] In step 289c, the value of the counter of the candidate cell is passed to the target cell along with the cell handover.

[0147] Figure 2d Flowchart showing some further embodiments of the cell handover method of the present disclosure.

[0148] As Figure 2d shown, in step 210d, the terrestrial mobile beam satellite cell broadcasts the trajectory change information of its cell coverage reference point information.

[0149] In step 220d, it is determined whether the satellite corresponding to the terrestrial mobile beam satellite cell has moved to the farthest point position of the trajectory change information. If so, step 230d is executed; if not, step 210d is repeatedly executed.

[0150] In step 230d, a trajectory change information update process is triggered; the satellite broadcasts the updated trajectory change information and updates the valueTag value in the SIB1 message.

[0151] In step 240d, when the valueTag value in the broadcast message received by the terminal changes, the updated trajectory change information in the broadcast message is received again.

[0152] Figure 3 Flowchart showing some more embodiments of the cell handover method of the present disclosure.

[0153] As Figure 3 shown, in step 310, according to the first position change information of the cell coverage reference point of the current serving cell broadcast by the current serving cell within a first preset time period, it is determined whether to trigger a cell handover.

[0154] In step 320, when it is determined to trigger a cell handover, the location information of the terminal is returned to the current serving cell.

[0155] In step 330, cell handover is performed according to the relevant information for cell handover sent by the current serving cell.

[0156] In some embodiments, according to the first location change information, the first real-time location of the cell coverage reference point of the current serving cell is predicted; according to the first real-time location, it is determined whether to trigger cell handover.

[0157] In some embodiments, the first location change information includes multiple first locations of the cell coverage reference point of the current serving cell within a first preset time period, and the time information corresponding to each of the multiple first locations.

[0158] In some embodiments, according to the first real-time location and the location information of the terminal, the first distance between the terminal and the cell coverage reference point of the current serving cell is determined; when the first distance is greater than a first threshold, cell handover is triggered.

[0159] In some embodiments, the relevant information for cell handover includes the configuration information of the candidate cells for cell handover, and the candidate cells are predicted by the current serving cell according to the location information of the terminal.

[0160] In some embodiments, the configuration information of the candidate cells includes the second location change information of the cell coverage reference point of the candidate cells within a second preset time period. According to the second location change information and the first location change information, cell handover is performed.

[0161] In some embodiments, according to the first location change information, the first real-time location of the cell coverage reference point of the current serving cell is predicted; according to the first real-time location and the location information of the terminal, the first distance between the terminal and the cell coverage reference point of the current serving cell is determined; according to the second location change information, the second real-time location of the cell coverage reference point of the candidate cell is predicted; according to the second real-time location and the location information of the terminal, the second distance between the terminal and the cell coverage reference point of the candidate cell is determined; according to the first distance and the second distance, cell handover is performed.

[0162] In some embodiments, when the first distance is greater than a second threshold and the second distance is less than a third threshold, cell handover is performed.

[0163] In some embodiments, when it is determined to trigger cell handover, the signal quality of the neighboring cells of the current serving cell is returned to the current serving cell to assist the current serving cell in predicting candidate cells.

[0164] In some embodiments, when the channel quality of a candidate cell for cell handover fails to meet a preset condition, a replacement request message for the candidate cell for cell handover is sent to the current serving cell; updated configuration information of the candidate cell is received from the current serving cell, and the configuration information of the candidate cell is updated according to the number of times the candidate cell is requested to be replaced.

[0165] In some embodiments, the replacement request message includes radio measurement information of adjacent cells of the current serving cell.

[0166] In some embodiments, the candidate cell includes the candidate cell at the current moment, and the configuration information of the candidate cell is updated through the following steps: when the number of times of being requested to be replaced is less than a fourth threshold, the configuration information of the candidate cell at the current moment is updated; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at a future moment are updated.

[0167] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, a prompt message indicating that the first position change information is updated is received, and the first position change information is updated to the third position change information; according to the prompt message, the third position change information is received.

[0168] For example, in a ground mobile beam satellite cell, trajectory change information of broadcast cell coverage reference point information is broadcast. The trajectory change information is {(time 1, position 1); (time 2, position 2);

[0169] (time 3, position 3);}. The position information between different cell coverage reference points can be inferred in combination with ephemeris information.

[0170] For example, when the terminal is at position 4, the distance between position 4 and the position of cell coverage reference point 5 of the current serving cell is calculated according to the trajectory change information, ephemeris information, and position information of the terminal of the cell coverage reference point of the current serving cell; when the distance is greater than threshold 1, a measurement report is triggered. The reported content may include terminal position information and signal quality of adjacent cells of the current serving cell.

[0171] For example, the network side issues conditional handover configuration to the terminal according to the content of the measurement report. The network can predict multiple candidate cells according to ephemeris information and the position of the terminal, and issue configuration information: {(candidate cell 1, trajectory change information 1); (candidate cell 2, trajectory change information 2); (candidate cell 3, trajectory change information 3)}.

[0172] For example, the terminal can access candidate target cells 1, 2, and 3 in sequence according to the configuration information. The execution conditions for this step include: The terminal infers the position change of the cell coverage reference points of the current serving cell and the candidate cells based on the trajectory change information 1, 2, and 3; When the distance between the terminal and the cell coverage reference point of the current serving cell is greater than threshold 2 and the distance between the terminal and the cell coverage reference point of the candidate cell is less than threshold value 3, condition switching is executed to switch to the target cell.

[0173] For example, the target cell sends resource release messages to the source cell in sequence.

[0174] For example, during the execution of handover, when the channel quality of the candidate cell fails to meet the requirements for condition switching execution, the terminal sends a replacement request message for the candidate cell to the current serving cell. This message may include a radio measurement report on the neighboring cells of the current serving cell.

[0175] For example, the network side maintains condition switching configuration and updates a counter. Each time a replacement request message for the candidate cell is received, the value of its counter is incremented by one.

[0176] For example, when the value of the counter is less than threshold 4, the network side only updates the configuration of the candidate cell that should be accessed at the current moment.

[0177] For example, when the value of the counter is greater than or equal to threshold 4, the network side updates the configuration of the candidate cells at the current moment and subsequent moments.

[0178] For example, when only the configuration of the candidate cell accessed at the current moment is updated, the value of the counter is passed to the target cell along with the handover.

[0179] For example, when the configuration of the candidate cells at the current moment and subsequent moments is updated, the counter is reset to zero, and the target cell starts to maintain the counter again.

[0180] For example, as the satellite moves, when the satellite moves to the position of the farthest point of the trajectory change information, a trajectory information update process is triggered.

[0181] For example, the satellite broadcasts the updated trajectory information and updates the valueTag value in the SIB1 message.

[0182] For example, when the valueTag value changes in the broadcast message received by the terminal, the terminal re-receives the trajectory change information in the broadcast message.

[0183] In the above embodiments, the network side broadcasts the trajectory change information of the cell coverage reference point to assist the terminal in predicting the real-time position of the satellite cell of the ground mobile beam. The network side predicts multiple candidate cells based on the position information and adds the trajectory information of the candidate cells to the condition configuration. The terminal can trigger multiple conditional handovers in sequence based on the position information, avoiding frequent interactions between the terminal and the network.

[0184] In the above embodiments, a conditional handover configuration update mechanism is designed. When the radio channel cannot meet the execution conditions of the conditional handover, the configuration is updated, and a conditional handover configuration update counter is introduced to control the number of updated configurations through the counter. A location-based cell coverage reference point trajectory information update mechanism is designed to avoid frequent updates of broadcast messages.

[0185] Figure 4a The block diagram showing some embodiments of the cell handover device of the present disclosure.

[0186] As Figure 4a shown, the cell handover device 4a on the network side includes: a sending unit 41a, configured to broadcast, to the terminal, first position change information of a cell coverage reference point of the current serving cell within a first preset time period, so that the terminal determines whether to trigger a cell handover according to the first position change information, and in the case that the terminal determines to trigger a cell handover, send relevant information for performing the cell handover to the terminal, so that the terminal performs the cell handover according to the relevant information.

[0187] In some embodiments, the first position change information is used to instruct the terminal to predict a first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines whether to trigger a cell handover according to the first real-time position.

[0188] In some embodiments, the first real-time position is used to instruct the terminal to determine a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal, and trigger a cell handover when the first distance is greater than a first threshold.

[0189] In some embodiments, the cell handover device 4a on the network side further includes: a prediction unit 42a, configured to, in the case that the terminal determines to trigger a cell handover, predict candidate cells for the cell handover according to the position information of the terminal returned by the terminal, where the relevant information for the cell handover includes configuration information of the candidate cells.

[0190] In some embodiments, the configuration information of the candidate cells includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period, so that the terminal performs a cell handover according to the second position change information and the first position change information.

[0191] In some embodiments, the first position change information is used to instruct the terminal to predict the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal can determine the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal; the second position change information is used to instruct the terminal to predict the second real-time position of the cell coverage reference point of the candidate cell according to the second position change information, so that the terminal can determine the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the position information of the terminal, and perform cell handover according to the first distance and the second distance.

[0192] In some embodiments, the cell handover is performed when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0193] In some embodiments, the prediction unit 42a predicts candidate cells according to the signal quality of the neighboring cells of the current serving cell returned by the terminal and the position information of the terminal.

[0194] In some embodiments, the configuration information of the candidate cell includes radio resource configuration information.

[0195] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within a first preset time period, and the time information corresponding to each of the multiple first positions.

[0196] In some embodiments, the cell handover device 4a on the network side further includes: a receiving unit 43a, configured to receive a resource release message sent by the target cell of the cell handover when the terminal completes the cell handover.

[0197] In some embodiments, the cell handover device 4a on the network side further includes: an updating unit 44a, configured to update the configuration information of the candidate cell according to the number of times the candidate cell is requested to be replaced when the terminal sends replacement request information for the candidate cell for cell handover.

[0198] In some embodiments, the candidate cell includes the candidate cell at the current moment. The updating unit updates the configuration information of the candidate cell at the current moment when the number of times being requested to be replaced is less than a fourth threshold; and updates the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at a future moment when the number of times being requested to be replaced is greater than or equal to the fourth threshold.

[0199] In some embodiments, when the update unit 44a receives a replacement request message from the terminal, it updates the number of times the candidate cell has been requested to be replaced; when the number of times requested to be replaced is less than the fourth threshold, the sending unit 41a sends the updated number of times the candidate cell has been requested to be replaced to the target cell for cell handover.

[0200] In some embodiments, when the number of times requested to be replaced is greater than or equal to the fourth threshold, the update unit 44a resets the number of times the candidate cell has been requested to be replaced to zero.

[0201] In some embodiments, the replacement request message includes radio measurement information of adjacent cells of the current serving cell.

[0202] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, the update unit 44a updates the first position change information to the third position change information; the sending unit 41a sends a prompt message indicating that the first position change information has been updated to the terminal, so that the terminal can receive the third position change information.

[0203] Figure 4b The block diagram showing other embodiments of the cell handover device of the present disclosure.

[0204] As Figure 4b shown, the cell handover device 4b includes: a determination unit 41b, configured to determine whether to trigger a cell handover according to the first position change information of the cell coverage reference point of the current serving cell broadcast within a first preset time period; a sending unit 42b, configured to return the position information of the terminal to the current serving cell when it is determined to trigger a cell handover; a handover unit 43b, configured to perform a cell handover according to the relevant information for cell handover sent by the current serving cell.

[0205] In some embodiments, the determination unit 41b predicts the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information; and determines whether to trigger a cell handover according to the first real-time position.

[0206] In some embodiments, the first position change information includes multiple first positions of the cell coverage reference point of the current serving cell within a first preset time period, and time information corresponding to each of the multiple first positions.

[0207] In some embodiments, the determination unit 41b determines the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the position information of the terminal; the handover unit 43b triggers a cell handover when the first distance is greater than the first threshold.

[0208] In some embodiments, the relevant information for cell handover includes the configuration information of the candidate cells for cell handover, and the candidate cells are predicted by the current serving cell based on the location information of the terminal.

[0209] In some embodiments, the configuration information of the candidate cell includes the second position change information of the cell coverage reference point of the candidate cell within a second preset time period, and the handover unit performs cell handover based on the second position change information and the first position change information.

[0210] In some embodiments, the handover unit 43b predicts the first real-time position of the cell coverage reference point of the current serving cell according to the first position change information, determines the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first real-time position and the location information of the terminal, predicts the second real-time position of the cell coverage reference point of the candidate cell according to the second position change information, determines the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second real-time position and the location information of the terminal, and performs cell handover based on the first distance and the second distance.

[0211] In some embodiments, the handover unit 43b performs cell handover when the first distance is greater than a second threshold and the second distance is less than a third threshold.

[0212] In some embodiments, when determining that cell handover is triggered, the sending unit 42b returns the signal quality of the neighboring cells of the current serving cell to the current serving cell, which is used to assist the current serving cell in predicting candidate cells.

[0213] In some embodiments, when the channel quality of the candidate cell for cell handover fails to meet the preset conditions, the sending unit 42b sends replacement request information for the candidate cell for cell handover to the current serving cell. The cell handover device 4b on the terminal side further includes a receiving unit 44b, which is used to receive the updated configuration information of the candidate cell sent by the current serving cell, and the configuration information of the candidate cell is updated according to the number of times the candidate cell is requested to be replaced.

[0214] In some embodiments, the replacement request information includes the radio measurement information of the neighboring cells of the current serving cell.

[0215] In some embodiments, the candidate cells include the candidate cells at the current moment, and the configuration information of the candidate cells is updated through the following steps: when the number of times of being requested to be replaced is less than a fourth threshold, the configuration information of the candidate cells at the current moment is updated; when the number of times of being requested to be replaced is greater than or equal to the fourth threshold, the configuration information of the candidate cells at the current moment and the configuration information of the candidate cells at the future moment are updated.

[0216] In some embodiments, when the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, the receiving unit 44b receives a prompt message indicating that the first position change information has been updated, and the first position change information is updated to the third position change information. According to the prompt message, the receiving unit 44b receives the third position change information.

[0217] Figure 5 A block diagram showing some embodiments of the electronic device of the present disclosure.

[0218] As Figure 5 shown, the electronic device 5 of this embodiment includes: a memory 51 and a processor 52 coupled to the memory 51. The processor 52 is configured to execute the cell handover method on the network side or the cell handover method on the terminal side in any one of the embodiments of the present disclosure based on the instructions stored in the memory 51.

[0219] Among them, the memory 51 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory stores, for example, an operating system, application programs, a boot loader, a database, and other programs.

[0220] Figure 6 A block diagram showing some other embodiments of the electronic device of the present disclosure.

[0221] As Figure 6 shown, the electronic device 6 of this embodiment includes: a memory 610 and a processor 620 coupled to the memory 610. The processor 620 is configured to execute the cell handover method on the network side or the cell handover method on the terminal side in any one of the foregoing embodiments based on the instructions stored in the memory 610.

[0222] The memory 610 may include, for example, a system memory, a fixed non-volatile storage medium, etc. The system memory stores, for example, an operating system, application programs, a boot loader, and other programs.

[0223] The electronic device 6 may further include an input / output interface 630, a network interface 640, a storage interface 650, etc. These interfaces 630, 640, 650 and the memory 610 and the processor 620 may be connected through a bus 660, for example. Among them, the input / output interface 630 provides a connection interface for input / output devices such as a display, a mouse, a keyboard, a touch screen, a microphone, and a speaker. The network interface 640 provides a connection interface for various networking devices. The storage interface 650 provides a connection interface for external storage devices such as an SD card and a USB flash drive.

[0224] Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable non-transitory storage media including but not limited to disk storage, CD-ROM, optical storage, etc. that contain computer-usable program code.

[0225] Figure 7 A block diagram showing some embodiments of the cell handover system of the present disclosure.

[0226] As Figure 7 shown, the cell handover system 7 includes: a first cell handover device 71 for performing the cell handover method on the terminal side in any of the above embodiments; a second cell handover device 72 for performing the cell handover method on the network side in any of the above embodiments.

[0227] So far, the cell handover method, cell handover device, cell handover system, electronic device, and non-volatile computer-readable storage medium according to the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0228] The methods and systems of the present disclosure can be implemented in many ways. For example, the methods and systems of the present disclosure can be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is only for illustration, and the steps of the method of the present disclosure are not limited to the specific order described above unless otherwise specifically stated. In addition, in some embodiments, the present disclosure can also be implemented as a program recorded in a recording medium, and these programs include machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

[0229] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A cell handover method, comprising: Broadcasting first position change information of a cell coverage reference point of a current serving cell within a first preset time period to a terminal, so that the terminal determines whether to trigger a cell handover according to the first position change information; When the terminal determines to trigger the cell handover, sending relevant information for performing the cell handover to the terminal, so that the terminal performs the cell handover according to the relevant information, The relevant information for the cell handover includes configuration information of a candidate cell for the cell handover, and the configuration information of the candidate cell includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period, The first position change information is used to instruct the terminal to predict a first position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal; The second position change information is used to instruct the terminal to predict a second position of the cell coverage reference point of the candidate cell according to the second position change information, so that the terminal determines a second distance between the terminal and the cell coverage reference point of the candidate cell according to the second position and the position information of the terminal, and performs the cell handover according to the first distance and the second distance.

2. The cell handover method according to claim 1, wherein, The first position change information is used to instruct the terminal to predict a first position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines whether to trigger the cell handover according to the first position.

3. The cell handover method according to claim 2, wherein, The first position is used to instruct the terminal to determine a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal, and trigger the cell handover when the first distance is greater than a first threshold.

4. The cell handover method according to claim 1, further comprising: When the terminal determines to trigger the cell handover, predicting a candidate cell for the cell handover according to the position information of the terminal returned by the terminal, and the relevant information for the cell handover includes configuration information of the candidate cell.

5. The cell handover method according to claim 1, wherein, The cell handover is performed when the first distance is greater than a second threshold and the second distance is less than a third threshold.

6. The cell handover method according to claim 4, wherein, The predicting the candidate cell for the cell handover includes: Predicting the candidate cell according to the signal quality of adjacent cells of the current serving cell returned by the terminal and the position information of the terminal.

7. The cell handover method according to claim 4, wherein, The configuration information of the candidate cell includes radio resource configuration information.

8. The cell handover method according to any one of claims 1-7, wherein, The first position change information includes a plurality of first positions of the cell coverage reference point of the current serving cell within a first preset time period, and time information corresponding to each of the plurality of first positions.

9. The cell handover method according to any one of claims 1-7, further comprising: When the terminal completes the cell handover, receiving a resource release message sent by a target cell of the cell handover.

10. The cell handover method according to any one of claims 1-7 further includes: When the terminal sends replacement request information for a candidate cell for the cell handover, updating the configuration information of the candidate cell according to the number of times the candidate cell is requested to be replaced.

11. The cell handover method according to claim 10, wherein, The candidate cell includes the candidate cell at the current moment. The updating the configuration information of the candidate cell includes: When the number of times requested to be replaced is less than a fourth threshold, updating the configuration information of the candidate cell at the current moment; When the number of times requested to be replaced is greater than or equal to the fourth threshold, updating the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at a future moment.

12. The cell handover method according to claim 10 further includes: When the terminal sends the replacement request information, updating the number of times the candidate cell is requested to be replaced; When the number of times requested to be replaced is less than the fourth threshold, sending the updated number of times the candidate cell is requested to be replaced to the target cell of the cell handover.

13. The cell handover method according to claim 10 further includes: When the number of times requested to be replaced is greater than or equal to the fourth threshold, resetting the number of times the candidate cell is requested to be replaced to zero.

14. The cell handover method according to claim 10, wherein, The replacement request information includes radio measurement information of adjacent cells of the current serving cell.

15. The cell handover method according to any one of claims 1-7 further includes: When the satellite corresponding to the current serving cell moves to the farthest point position corresponding to the first position change information, updating the first position change information to the third position change information; Sending a prompt message indicating that the first position change information is updated to the terminal, so that the terminal receives the third position change information.

16. A cell handover method includes: Determining whether to trigger a cell handover according to the first position change information of the cell coverage reference point of the current serving cell broadcast within a first preset time period; Performing the cell handover according to the relevant information for performing the cell handover sent by the current serving cell, where the relevant information for the cell handover includes the configuration information of the candidate cell for the cell handover, and the configuration information of the candidate cell includes the second position change information of the cell coverage reference point of the candidate cell within a second preset time period. Wherein, the performing the cell handover includes: Predicting the first position of the cell coverage reference point of the current serving cell according to the first position change information; Determining the first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal; Predicting the second position of the cell coverage reference point of the candidate cell according to the second position change information; Determining the second distance between the terminal and the cell coverage reference point of the candidate cell according to the second position and the position information of the terminal; Performing the cell handover according to the first distance and the second distance.

17. The cell handover method according to claim 16, wherein, The determining whether to trigger a cell handover includes: Predict a first position of a cell coverage reference point of the current serving cell according to the first position change information; Determine whether to trigger the cell handover according to the first position; 18. The cell handover method according to claim 17, wherein, The determining whether to trigger the cell handover includes: Determine a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal; Trigger the cell handover when the first distance is greater than a first threshold; 19. The cell handover method according to claim 16, wherein the candidate cell is predicted by the current serving cell according to the position information of the terminal.

20. The cell handover method according to claim 16, wherein, The performing the cell handover includes: Perform the cell handover when the first distance is greater than a second threshold and the second distance is less than a third threshold; 21. The cell handover method according to claim 19, further comprising: When it is determined to trigger the cell handover, return signal quality of adjacent cells of the current serving cell to the current serving cell, for assisting the current serving cell to predict the candidate cell; 22. The cell handover method according to any one of claims 16-21, further comprising: When the channel quality of the candidate cell for the cell handover fails to meet a preset condition, send replacement request information for the candidate cell for the cell handover to the current serving cell; Receive updated configuration information of the candidate cell sent by the current serving cell, and the configuration information of the candidate cell is updated according to the number of times the candidate cell is requested to be replaced; 23. The cell handover method according to claim 22, wherein, The candidate cell includes a candidate cell at the current moment, The configuration information of the candidate cell is updated through the following steps: When the number of times of being requested to be replaced is less than a fourth threshold, update the configuration information of the candidate cell at the current moment; When the number of times of being requested to be replaced is greater than or equal to the fourth threshold, update the configuration information of the candidate cell at the current moment and the configuration information of the candidate cell at a future moment; 24. The cell handover method according to any one of claims 16-21, further comprising: When the satellite corresponding to the current serving cell moves to the position of the farthest point corresponding to the first position change information, receive a prompt message that the first position change information is updated, and the first position change information is updated to third position change information; Receive the third position change information according to the prompt message; 25. A cell handover device, comprising: A sending unit, configured to broadcast, to a terminal, first position change information of a cell coverage reference point of a current serving cell within a first preset time period, so that the terminal determines whether to trigger a cell handover according to the first position change information, and in a case that the terminal determines to trigger the cell handover, send relevant information for performing the cell handover to the terminal, so that the terminal performs the cell handover according to the relevant information, where the relevant information for the cell handover includes configuration information of a candidate cell for the cell handover, and the configuration information of the candidate cell includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period. Wherein, the first position change information is used to instruct the terminal to predict a first position of the cell coverage reference point of the current serving cell according to the first position change information, so that the terminal determines a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal. The second position change information is used to instruct the terminal to predict a second position of the cell coverage reference point of the candidate cell according to the second position change information, so that the terminal determines a second distance between the terminal and the cell coverage reference point of the candidate cell according to the second position and the position information of the terminal, and performs the cell handover according to the first distance and the second distance.

26. A cell handover device, comprising: A determining unit, configured to determine whether to trigger a cell handover according to first position change information of a cell coverage reference point of a current serving cell broadcast by the current serving cell within a first preset time period. A handover unit, configured to perform the cell handover according to relevant information for performing the cell handover sent by the current serving cell, where the relevant information for the cell handover includes configuration information of a candidate cell for the cell handover, and the configuration information of the candidate cell includes second position change information of the cell coverage reference point of the candidate cell within a second preset time period. Wherein, the handover unit predicts a first position of the cell coverage reference point of the current serving cell according to the first position change information, determines a first distance between the terminal and the cell coverage reference point of the current serving cell according to the first position and the position information of the terminal, predicts a second position of the cell coverage reference point of the candidate cell according to the second position change information, determines a second distance between the terminal and the cell coverage reference point of the candidate cell according to the second position and the position information of the terminal, and performs the cell handover according to the first distance and the second distance.

27. A cell handover system, comprising: A first cell handover device, configured to execute the cell handover method according to any one of claims 1-15. A second cell handover device, configured to execute the cell handover method according to any one of claims 16-24.

28. An electronic device, comprising: A memory; And A processor coupled to the memory, the processor being configured to execute the cell handover method according to any one of claims 1-15, or the cell handover method according to any one of claims 16-24, based on instructions stored in the memory.

29. A non-volatile computer-readable storage medium having stored thereon a computer program, which when executed by a processor implements the cell handover method according to any one of claims 1-15, or the cell handover method according to any one of claims 16-24.

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