Wireless communication system and method for neighbor cell handover

Abstract

The application discloses a wireless communication system and a neighbor cell switching method. The system comprises a control center, a plurality of base stations and a plurality of terminals in a network, and the types of the plurality of base stations comprise a first base station with 5G ultra-remote coverage and a second base station without 5G ultra-remote coverage. The control center is responsible for collecting base station information, constructing a base station group database, and configuring a neighbor cell relationship and a switching strategy. The base station receives a measurement report of the terminal. If the measurement report triggers the neighbor cell switching strategy, the base station ranks the neighbor cell base stations according to the communication quality, attempts to switch to the best neighbor cell base station, and continues to attempt until success if the switching fails. When the switching fails, the base station reports a time advance to the control center. The control center counts the time advance, and if the time advance exceeds a threshold, adjusts the cell configuration radius. The application solves the technical problem that the switching fails due to the inconsistency between the access distance and the cell radius configuration in the 5G ultra-remote coverage cell group in a sea area and other scenes.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to a wireless communication system and a neighbor cell handover method. BACKGROUND

[0002] In the 5G standalone networking mode, handover in mobility management is an important technology to ensure that the user equipment does not drop during movement. When the terminal moves to the edge of the cell coverage, the signal quality of the current service cell becomes poor, while the signal quality of the adjacent cell is good, which triggers the coverage-based handover to prevent call interruption due to poor signal quality. However, in open areas such as sea areas, the existing 5G handover process may cause unnecessary handover attempts due to ultra-long distance coverage and slow signal attenuation, especially after the random access message fails. In addition, in environments such as sea areas, 5G signals may be affected by reflection and scattering, resulting in unstable signal quality, making it difficult for the existing handover scheme to effectively control and implement smooth handover of signals. These problems may cause call interruption or data connection quality degradation, affecting user experience.

[0003] At present, there is no effective solution to the above problems. SUMMARY

[0004] The embodiments of the present application provide a wireless communication system and a neighbor cell handover method to at least solve the technical problem that the handover frequently fails due to inconsistent access distance and cell radius configuration in the 5G ultra-long coverage cell group in scenarios such as sea areas.

[0005] According to an aspect of the embodiments of the present application, a wireless communication system is provided, comprising: a management center, a plurality of base stations and a plurality of terminals in a network, types of the plurality of base stations comprising: first base stations with 5G ultra-remote coverage enabled and second base stations with 5G ultra-remote coverage disabled, wherein the management center is configured to acquire base station information of the plurality of base stations in a target area selected by a target object, construct a base station group database according to the base station information, and configure each base station with a neighbor relation and a neighbor handover strategy; each base station is configured to acquire a measurement report reported by each terminal accessing the base station; for each terminal, if the measurement report of the terminal triggers the neighbor handover strategy of the base station, each neighbor base station corresponding to the base station is sorted in descending order of communication quality according to the measurement report of the terminal, and the terminal is attempted to be handed over to a neighbor base station with the highest communication quality according to the sorting result, if the handover fails, the terminal is attempted to be handed over to a next neighbor base station in the sorting result until the handover succeeds; wherein each neighbor base station with a handover failure is configured to report a timing advance corresponding to the terminal and the neighbor base station with the handover failure to the management center when the handover fails due to access distance; the management center is further configured to count a total number of the timing advances reported by each base station; for each base station, if the total number of the timing advances reported by the base station exceeds a preset threshold, a cell radius of the base station is adjusted according to a plurality of timing advances reported by the base station.

[0006] Optionally, the management center is configured to acquire base station information of the plurality of base stations in a target area selected by a target object, wherein the base station information at least comprises: base station number, physical cell identifier, 5G ultra-remote coverage attribute, and cell configuration radius; the plurality of base stations are networked and a base station group database is constructed, wherein the base station group database comprises a sub-database corresponding to each base station, and the sub-database comprises: base station information of the base station, each timing advance reported by the base station, and a total number of the reported timing advances.

[0007] Optionally, the management center is further configured to close an automatic neighbor relation function of the plurality of base stations; for each target first base station, each second base station is sequentially configured as a neighbor of the target first base station and a neighbor handover strategy based on A3 event is configured, each first base station is sequentially configured as a neighbor of the target first base station and a neighbor handover strategy based on a combination of A3 event and A5 event is configured, wherein the target first base station is any first base station in the plurality of first base stations; for each target second base station, each first base station is sequentially configured as a neighbor of the target second base station and a neighbor handover strategy based on a combination of A3 event and A5 event is configured, and each second base station adjacent to a coverage area of the target second base station is sequentially configured as a neighbor of the target second base station and a neighbor handover strategy based on A3 event is configured, wherein the target second base station is any second base station in the plurality of second base stations.

[0008] Optionally, the management center is further configured to test the communication state of the terminal in the target area; if there is a communication abnormality problem caused by cell coverage, the first prompt information is sent to the target object, wherein the first prompt information is used to prompt that the multiple base stations of the networking need to be reselected; if there is a communication abnormality problem caused by data transmission rate, the second prompt information is sent to the target object, wherein the second prompt information is used to prompt that the data transmission configuration parameters of each base station of the current networking need to be adjusted.

[0009] Optionally, each base station is configured to acquire the measurement report reported by each terminal accessing the base station, wherein the measurement report comprises signal quality parameters and time advance of each adjacent base station measured by the terminal, and the type of the signal quality parameter comprises at least one of the following: reference signal received power, reference signal received quality, and signal to interference plus noise ratio; for each terminal, the communication quality of each adjacent base station corresponding to the adjacent relationship of the base station is determined according to the measurement report of the terminal.

[0010] Optionally, in the process of attempting to switch the terminal to the target adjacent base station, the source base station is configured to send a handover request message to the target adjacent base station and receive a handover request acknowledgement message fed back by the target adjacent base station; send a radio resource control reconfiguration message to the terminal; the terminal is configured to send a random access request message to the target adjacent base station in response to the radio resource control reconfiguration message; in the case of successful random access, send a radio resource control reconfiguration complete message to the target adjacent base station; the target adjacent base station is configured to send a path switch request message to an access and mobility management function network element in response to the radio resource control reconfiguration complete message, receive a path switch acknowledgement message fed back by the access and mobility management function network element, and send a terminal context release message to the source base station; in the case of random access failure of the terminal, send a failure notification message to the source base station, and determine the access distance between the terminal and the target adjacent base station according to the time advance reported by the terminal when requesting to access the target adjacent base station, if the access distance is greater than the cell configuration radius of the target adjacent base station, report the time advance to the management center; the management center is configured to add the time advance to a sub-database corresponding to the target adjacent base station in the base station group database, and add one to the total number of the time advances reported in the sub-database; the source base station is configured to continue to attempt to switch the terminal to the next target adjacent base station in response to the failure notification message.

[0011] Optionally, the management center is configured to determine the access distance corresponding to each time advance reported by the base station and determine the average value of the multiple access distances when the total number of the time advances reported by any base station exceeds a preset threshold; if the average value is greater than a preset maximum cell radius corresponding to the base station, adjust the cell configuration radius of the base station to the preset maximum cell radius; if the average value is not greater than the preset maximum cell radius, adjust the cell configuration radius of the base station to the average value.

[0012] According to another aspect of the embodiments of the present application, a method for handover of a neighboring cell is also provided, which is applied to a management center and includes: obtaining base station information of a plurality of base stations in a target area selected by a target object, constructing a base station group database according to the base station information, and configuring a neighboring cell relationship and a handover strategy for each base station; wherein the types of the plurality of base stations include: a first base station with 5G ultra-remote coverage enabled and a second base station without 5G ultra-remote coverage enabled; each base station is configured to obtain a measurement report reported by each terminal accessing the base station, for each terminal, if the measurement report of the terminal triggers the handover strategy of the base station, each neighboring cell base station corresponding to the base station is sorted in descending order of communication quality according to the measurement report of the terminal, and the terminal is attempted to be handed over to a neighboring cell base station with the highest communication quality according to the sorting result, if the handover fails, the terminal is attempted to be handed over to a neighboring cell base station in the next sorting result, and the process is repeated until the handover is successful; each failed neighboring cell base station is configured to report a timing advance corresponding to the terminal and the failed neighboring cell base station to the management center when the handover fails due to access distance; and the total number of timing advances reported by each base station is counted, for each base station, if the total number of timing advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to the plurality of timing advances reported by the base station.

[0013] According to another aspect of the embodiments of the present application, a method for handover of a neighboring cell is also provided, which is applied to a base station and includes: obtaining a measurement report reported by each terminal accessing the base station, wherein the type of the base station includes: a first base station with 5G ultra-remote coverage enabled or a second base station without 5G ultra-remote coverage enabled; for each terminal, if the measurement report of the terminal triggers the handover strategy of the base station, each neighboring cell base station corresponding to the base station is sorted in descending order of communication quality according to the measurement report of the terminal; and the terminal is attempted to be handed over to a neighboring cell base station with the highest communication quality according to the sorting result, if the handover fails, the terminal is attempted to be handed over to a neighboring cell base station in the next sorting result, and the process is repeated until the handover is successful; wherein each failed neighboring cell base station is configured to report a timing advance corresponding to the terminal and the failed neighboring cell base station to the management center when the handover fails due to access distance; and the management center is configured to adjust the cell radius of each base station according to the plurality of timing advances reported by each base station.

[0014] According to another aspect of the embodiments of the present application, an electronic device is also provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the above-mentioned method for handover of a neighboring cell through the computer program.

[0015] In the embodiment of the present application, the management center, a plurality of base stations and a plurality of terminals in the network, the types of the plurality of base stations include: the first base station opening 5G ultra-coverage and the second base station not opening 5G ultra-coverage, wherein the management center is configured to obtain the base station information of the plurality of base stations in the target area selected by the target object, construct a base station group database according to the base station information, and configure the adjacent area relationship and the adjacent area handover strategy for each base station; each base station is configured to obtain the measurement report reported by each terminal accessing the base station; for each terminal, if the measurement report of the terminal triggers the adjacent area handover strategy of the base station, the base station corresponding to each adjacent area base station is sorted according to the communication quality from high to low according to the measurement report of the terminal, and the terminal is tried to be switched to the adjacent area base station with the highest communication quality according to the sorting result, if the switching fails, the terminal is tried to be switched to the next adjacent area base station in the sorting result, until the switching succeeds; wherein each adjacent area base station for switching failure is configured to report the time advance corresponding to the terminal and the adjacent area base station for switching failure to the management center when the switching failure is caused by the access distance; the management center is further configured to count the total number of time advances reported by each base station; for each base station, if the total number of time advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to the plurality of time advances reported by the base station. In this way, by using accurate adjacent area relationship management and dynamic handover strategy, the handover success rate of the terminal between the base stations can be improved, the intelligent analysis and adjustment of the management center help to optimize the network coverage, especially in the ultra-coverage area, to ensure that the signal coverage is neither excessive nor insufficient, thereby solving the technical problem that the handover failure is often caused by the inconsistency between the access distance and the cell radius configuration in the 5G ultra-coverage cell group in the sea area and other scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 is a structural schematic diagram of an optional wireless communication system according to an embodiment of the present application;

[0018] Figure 2 is a flow schematic diagram of an optional cell group planning method of a plurality of base stations according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of an optional adjacent area relationship of a plurality of base stations according to an embodiment of the present application;

[0020] Figure 4 is an optional iteration optimization schematic diagram of the cell radius and the time advance of each base station according to an embodiment of the present application;

[0021] Figure 5 is a flowchart of an optional terminal and adjacent base station 1 random access failure and adjacent base station 2 random access success according to an embodiment of the application;

[0022] Figure 6 is a flowchart of an optional adjacent cell handover method according to an embodiment of the application;

[0023] Figure 7 is a flowchart of another optional adjacent cell handover method according to an embodiment of the application;

[0024] Figure 8 is a structural schematic diagram of an optional electronic device according to an embodiment of the application. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] In order to better understand the embodiments of the present application, first, the translation explanation of some nouns or terms appearing in the description of the embodiments of the present application is as follows:

[0028] Timing Advance (TA): an important parameter in 5G network, the base station measures the offset between the received signal and the expected arrival time, then calculates the required timing advance, instructs the terminal to adjust the advance time of its uplink transmission, which helps to keep all terminals in the cell transmission in time synchronization.

[0029] Automatic Neighbor Relation (ANR): A key technology for optimizing network performance and reducing manual configuration requirements. It allows base stations to automatically discover neighboring base stations with which they have interference or potential handover relationships. Through measurement reports reported by terminals, base stations can identify neighboring base stations that terminals frequently report as having high signal strength. It allows the network to automatically discover and add neighboring cells, identify and delete mismatched or redundant neighboring cells, and optimize neighboring cell attributes.

[0030] PCI (Physical Cell Identity): A parameter used to uniquely identify a cell, distinguishing different cells, especially in dense network scenarios, to ensure that user equipment can correctly identify and connect to the serving cell.

[0031] Reference Signal Received Power (RSRP) refers to the average signal power received on all resource elements carrying the reference signal within a given symbol. It reflects the wireless signal strength between the terminal and the base station and is an important parameter for evaluating wireless link quality; a higher RSRP value indicates better signal coverage.

[0032] Reference Signal Received Quality (RSRQ): This reflects the signal quality and is calculated by comparing the received reference signal power (RSRP) with the total interference plus noise power (RSSI). The higher the RSRQ value, the better the signal quality.

[0033] Signal-to-Noise Ratio (SNR): This represents the ratio of the power of the useful signal to the power of the background noise.

[0034] Example 1

[0035] According to an embodiment of this application, a wireless communication system is first provided, such as... Figure 1 As shown, the system includes at least: a control center 11, multiple networked base stations, and multiple terminals 13 (1-s). The multiple base stations include: a first base station 121 (1-m) with 5G ultra-long-range coverage enabled, and a second base station 122 (1-n) without 5G ultra-long-range coverage enabled.

[0036] Control Center 11 is used to obtain base station information of multiple base stations in the target area selected by the target object, construct a base station group database based on the base station information, and configure neighbor cell relationships and neighbor cell handover strategies for each base station.

[0037] The base station is configured to obtain a measurement report reported by each terminal accessing the base station; for each terminal, if the measurement report of the terminal triggers a handover strategy of the base station, the base station sorts each neighboring base station corresponding to the base station according to the communication quality from high to low according to the measurement report of the terminal, and attempts to hand over the terminal to the neighboring base station with the highest communication quality according to the sorting result, and if the handover fails, attempts to hand over the terminal to the next neighboring base station in the sorting result until the handover succeeds; wherein each neighboring base station that fails to hand over is configured to report the time advance corresponding to the terminal and the neighboring base station that fails to hand over to the management center when the handover fails due to access distance.

[0038] The management center 11 is further configured to count the total number of time advances reported by each base station; for each base station, if the total number of time advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to the multiple time advances reported by the base station.

[0039] The functions of each part of the wireless communication system will be described in combination with the specific implementation process.

[0040] In order to overcome the challenges encountered in the 5G network coverage of open areas such as sea areas, especially to solve the problem of handover failure caused by mismatching of access distance and cell radius configuration, the first base station with 5G ultra-long coverage and the second base station without 5G ultra-long coverage, and the management center are used to configure the neighboring relationship and the handover strategy, so as to ensure seamless connection and optimized network performance of the terminal in the handover process between cells.

[0041] Firstly, in the target area selected by the target object, in order to enable the terminal to efficiently hand over to the base station with the strongest signal, the management center obtains the base station information of multiple base stations in the target area selected by the target object, constructs a base station group database according to the base station information, and configures the neighboring relationship and the neighboring handover strategy for each base station, wherein the base station information at least includes: base station number, physical cell identifier, 5G ultra-long coverage attribute, and cell configuration radius; and then the multiple base stations are networked and a base station group database is constructed, wherein the base station group database includes a sub-database corresponding to each base station, and the sub-database includes the base station information of the base station, and in particular, it also includes the time advance corresponding to the terminal and the total number of time advances reported by each neighboring base station that fails to hand over to the management center when the handover fails due to access distance.

[0042] Optionally, considering that the automatic neighbor relation function can not take into account all specific network conditions and service requirements, the management center is further configured to turn off the automatic neighbor relation function of the plurality of base stations; for each target first base station, the management center in turn configures each of the other first base stations as a neighbor of the target first base station, and configures a neighbor switching strategy based on an A3 event, and in turn configures each of the second base stations as a neighbor of the target first base station, and configures a neighbor switching strategy based on a combination of A3 event and A5 event, wherein the target first base station is any one of the plurality of first base stations; for each target second base station, in turn, each of the first base stations is configured as a neighbor of the target second base station, and a neighbor switching strategy based on a combination of A3 event and A5 event is configured, and in turn, other second base stations adjacent to the coverage area of the target second base station are configured as neighbors of the target second base station, and a neighbor switching strategy based on an A3 event is configured, wherein the target second base station is any one of the plurality of second base stations.

[0043] Wherein, A3 event is an important measurement event in 5G network, used to trigger handover between cells, the basic principle of A3 event is that when the signal quality of the neighbor cell is higher than the serving cell by a preset offset, the handover will be triggered, this offset can be positive or negative, depending on the network configuration. A5 event is also a measurement event for triggering cell handover, the characteristic of A5 event is that it combines the deterioration of the signal quality of the serving cell and the improvement of the signal quality of one or more neighbor cells, specifically, A5 event will be triggered when the signal quality of the serving cell is lower than a preset threshold (Thresh1), and the signal quality of at least one neighbor cell is higher than another preset threshold (Thresh2).

[0044] Optionally, the management center is further configured to test the communication state of the terminal in the target area; if there is a communication abnormality problem caused by cell coverage, a first prompt information is sent to the target object, the first prompt information is used to prompt the need to reselect the plurality of base stations for networking; if there is a communication abnormality problem caused by data transmission rate, a second prompt information is sent to the target object, the second prompt information is used to prompt the need to adjust the data transmission configuration parameters of each base station in the current networking.

[0045] Figure 2 A cell group planning method for a plurality of base stations is given, such as Figure 2As shown, the target object first selects a target area, selects the first base station opening 5G ultra-coverage and the second base station not opening 5G ultra-coverage in the area, and the cells of each base station, judges whether the coverage range of the cell meets the requirement, if not, the corresponding base station not opening or opening 5G ultra-coverage and the cell are selected again, if yes, for the first base station, the corresponding neighbor cells are added, the automatic neighbor cell relationship function of multiple base stations is closed, the neighbor cell switching strategy based on A3 event is configured, for the second base station, the neighbor cells are added according to the trajectory requirement, i.e. the actual moving trajectory and behavior mode of the terminal, the automatic neighbor cell relationship function of multiple base stations is closed, the neighbor cell switching strategy based on A3 event is configured, for the first base station and the second base station which are neighbor cells, the neighbor cell switching strategy based on the combination of A3 event and A5 event is configured, and whether the communication state of the terminal in the target area reaches the expected effect is tested again, if there is a communication abnormal problem caused by the cell coverage, the target area is selected again, i.e. the multiple base stations of the network are selected again, if there is a communication abnormal problem caused by the data transmission rate, the data transmission configuration parameters of each base station of the current network are adjusted, and through continuous selection and adjustment, the planning of the cell group of multiple base stations is finally completed.

[0046] For example, in Figure 3 As shown in the neighbor cell relationship diagram of multiple base stations, gNB1, gNB2, gNB3, gNB4 are 5G ultra-coverage base stations, gNB5, gNB6, gNB7 are 5G ultra-coverage base stations, each base station serves one cell, for the 5G ultra-coverage base station, the neighbor cell relationship is added, gNB1, gNB2, gNB3, gNB4 are neighbor cells to each other, the automatic neighbor cell relationship function is closed, and the neighbor cell switching strategy of A3 event is configured; for the 5G ultra-coverage base station, the base stations gNB5, gNB6 are configured with the neighbor cell relationship, the neighbor cell switching strategy of A3 event is set, and the switching relationship and strategy between the 5G ultra-coverage base station and the 5G ultra-coverage base station also need to be added, i.e. the base stations gNB1, gNB2, gNB3, gNB4 and the base stations gNB5, gNB6, gNB7 are configured with the switching relationship and the neighbor cell switching strategy of event A3 and event A5.

[0047] Optionally, each base station acquires the measurement report reported by each terminal accessing the base station, wherein the measurement report includes: the signal quality parameter and the time advance of each neighbor cell base station measured by the terminal, and the type of the signal quality parameter includes at least one of the following: reference signal received power, reference signal received quality, signal to interference plus noise ratio; for each terminal, the communication quality of each neighbor cell base station corresponding to the neighbor cell relationship of the base station is determined according to the measurement report of the terminal.

[0048] For each terminal, if the terminal's measurement report triggers the base station's neighbor cell handover policy, the base station sorts the neighbor cell base stations corresponding to the base station according to the terminal's measurement report in descending order of communication quality; then, it attempts to hand over the terminal to the neighbor cell base station with the highest communication quality based on the sorting results. If the handover fails, it attempts to hand over the terminal to the next neighbor cell base station in the sorting results until the handover is successful; in this case, each neighbor cell base station that fails to handover due to access distance reports the time advance between the terminal and the neighbor cell base station that failed to handover to the control center.

[0049] Similarly Figure 3 For example, when a terminal starts moving from the cell of gNB1, it reports a measurement report. gNB1 receives the measurement report reported by the terminal. The measurement report includes the measurement of the signal quality of multiple neighboring base stations, such as the physical cell identifiers corresponding to the base stations PCI5, PCI4, PCI2, PCI6, etc. gNB1 recommends the base station corresponding to PCI=5 as the neighboring base station with the highest communication quality.

[0050] As an optional implementation, to further iteratively optimize the cell radius and timing advance of each base station, after the control center receives the timing advance reported by any base station, it adds the timing advance to the sub-database corresponding to that base station in the base station group database, then increments the total number of timing advances reported in the sub-database by one, and adjusts the cell configuration radius of each base station based on the multiple timing advances reported by each base station. Specifically: when the total number of timing advances reported by any base station exceeds a preset threshold, the access distance corresponding to each timing advance reported by the base station is determined, and the average value of multiple access distances is determined; if the average value is greater than the preset maximum cell radius corresponding to the base station, the cell configuration radius of the base station is adjusted to the preset maximum cell radius; if the average value is not greater than the preset maximum cell radius, the cell configuration radius of the base station is adjusted to the average value. The process of iteratively optimizing the cell radius and timing advance of each base station by the control center is as follows: Figure 4 As shown.

[0051] Optionally, during the process of attempting to hand over the terminal to the target neighboring base station, the source base station sends a handover request message to the target neighboring base station, receives a handover request confirmation message from the target neighboring base station, and then sends a radio resource control reconfiguration message to the terminal; the terminal responds to the radio resource control reconfiguration message and sends a random access request message to the target neighboring base station.

[0052] In case of random access failure, the target neighbor base station sends a failure notification message to the source base station, and determines the access distance between the terminal and the target neighbor base station according to the time advance reported by the terminal when the terminal requests to access the target neighbor base station, and if the access distance is greater than the cell configuration radius of the target neighbor base station, the time advance is reported to the management center; the management center adds the time advance to the sub-database corresponding to the target neighbor base station in the base station group database, and adds one to the total number of the reported time advance in the sub-database; the source base station responds to the failure notification message and continues to attempt to hand over the terminal to the next target neighbor base station; in case of successful random access, the terminal sends a radio resource control reconfiguration complete message to the target neighbor base station; the target neighbor base station responds to the radio resource control reconfiguration complete message, sends a path switching request message to the access and mobility management function network element, and receives the path switching confirmation message fed back by the access and mobility management function network element, and then sends a terminal context release message to the source base station. Figure 5 A flowchart of the process that the terminal fails to randomly access the neighbor base station 1 and succeeds in randomly accessing the neighbor base station 2 is shown in FIG. 2, which includes the following steps: Figure 5

[0053] S1, the terminal sends a measurement report to the source base station;

[0054] S2, the source base station sends a handover request message to the neighbor base station 1;

[0055] S3, the neighbor base station 1 sends a handover request confirmation message to the source base station;

[0056] S4, the source base station sends a radio resource control reconfiguration message to the terminal;

[0057] S5, the terminal sends a random access request message to the neighbor base station 1;

[0058] S6, the neighbor base station 1 sends a failure notification message to the source base station;

[0059] S7, the source base station sends a handover request message to the neighbor base station 2;

[0060] S8, the neighbor base station 2 sends a handover request confirmation message to the source base station;

[0061] S9, the source base station sends a radio resource control reconfiguration message to the terminal; ​

[0062] S10, the terminal sends a random access request message RandomAccess Procedure to the neighbor base station 2;

[0063] S11, the terminal sends a radio resource control reconfiguration completion message RRC ReconfigurationComplete to the neighbor base station 2;

[0064] S12, the neighbor base station 2 sends a path switching request message Path SwitchReques to the access and mobile management function network element;

[0065] S13, the access and mobile management function network element sends a path switching confirmation message PathSwitchAck to the neighbor base station 2;

[0066] S14, the neighbor base station 2 sends a terminal context release message UE Context Release to the source base station.

[0067] After the source base station receives the terminal context release message, it will release the wireless resources and control plane resources related to the terminal, the neighbor switching process is completed, and the terminal will transmit information through the base station with high communication quality.

[0068] In the embodiment of the present application, the management center, the plurality of base stations and the plurality of terminals in the network, the types of the plurality of base stations include: the first base station with 5G ultra-coverage opened and the second base station without 5G ultra-coverage opened, wherein the management center is configured to obtain the base station information of the plurality of base stations in the target area selected by the target object, construct a base station group database according to the base station information, and configure the adjacent area relationship and the adjacent area handover strategy for each base station; each base station is configured to obtain the measurement report reported by each terminal accessing the base station; for each terminal, if the measurement report of the terminal triggers the adjacent area handover strategy of the base station, the adjacent area base stations corresponding to the base station are sorted in descending order of communication quality according to the measurement report of the terminal, and the terminal is attempted to be handed over to the adjacent area base station with the highest communication quality according to the sorting result, if the handover fails, the terminal is attempted to be handed over to the next adjacent area base station in the sorting result until the handover succeeds; wherein each adjacent area base station that fails to hand over is configured to report the timing advance of the terminal corresponding to the adjacent area base station that fails to hand over to the management center when the handover fails due to access distance; the management center is further configured to count the total number of timing advances reported by each base station; for each base station, if the total number of timing advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to the plurality of timing advances reported by the base station. In this way, by using accurate adjacent area relationship management and dynamic handover strategy, the handover success rate of the terminal between base stations can be improved, and the intelligent analysis and adjustment of the management center can help to optimize the network coverage, especially in the ultra-coverage area, to ensure that the signal coverage is neither excessive nor insufficient, thereby solving the technical problem that the handover frequently fails due to the inconsistency between the access distance and the cell radius configuration in the 5G ultra-coverage cell group in the sea area and other scenarios.

[0069] Embodiment 2

[0070] On the basis of the wireless communication system provided in embodiment 1, the present application further provides an adjacent area handover method applied to the management center. It should be noted that the steps shown in the flowchart of the drawing can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in different order from here.

[0071] Figure 6 is a flowchart of an adjacent area handover method according to the embodiment of the present application, as shown in Figure 5 the method comprises the following steps:

[0072] In step S602, base station information of a plurality of base stations in a target region selected by a target object is acquired, a base station group database is constructed according to the base station information, and a neighbor relation and a neighbor switching strategy are configured for each base station; wherein the types of the plurality of base stations include a first base station with 5G ultra-remote coverage opened and a second base station without 5G ultra-remote coverage opened; each base station is configured to acquire a measurement report reported by each terminal accessing the base station, for each terminal, if the measurement report of the terminal triggers the neighbor switching strategy of the base station, each neighbor base station corresponding to the base station is sorted in descending order of communication quality according to the measurement report of the terminal, and the terminal is switched to the neighbor base station with the highest communication quality according to the sorting result, if the switching fails, the terminal is switched to the next neighbor base station in the sorting result, and the switching is successful; each failed neighbor base station is configured to report a timing advance corresponding to the terminal and the failed neighbor base station to the control center when the switching fails due to access distance;

[0073] In step S604, the total number of timing advances reported by each base station is counted, for each base station, if the total number of timing advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to the plurality of timing advances reported by the base station.

[0074] The steps of the neighbor switching method are described in detail below in combination with a specific implementation process.

[0075] In the target region selected by the target object, in order to enable the terminal to be efficiently switched to the base station with the strongest signal, the control center acquires base station information of a plurality of base stations in a target region selected by a target object, constructs a base station group database according to the base station information, and configures a neighbor relation and a neighbor switching strategy for each base station, wherein the base station information at least includes: base station number, physical cell identifier, 5G ultra-remote coverage attribute, cell configuration radius; then the plurality of base stations are networked and a base station group database is constructed, wherein the base station group database includes a sub-database corresponding to each base station, the sub-database includes the base station information of the base station, and in particular, the time advance corresponding to the terminal and the failed neighbor base station, i.e., the total number of timing advances, reported by each failed neighbor base station when the switching fails due to access distance.

[0076] Optionally, considering that the automatic neighbor relation function can not take into account all specific network conditions and service requirements, the management center is further configured to turn off the automatic neighbor relation function of the plurality of base stations; for each target first base station, the management center successively configures each of the other first base stations as a neighbor of the target first base station and configures a neighbor switching strategy based on an A3 event, and successively configures each of the second base stations as a neighbor of the target first base station and configures a neighbor switching strategy based on a combination of the A3 event and an A5 event, wherein the target first base station is any one of the plurality of first base stations; for each target second base station, the management center successively configures each of the first base stations as a neighbor of the target second base station and configures a neighbor switching strategy based on a combination of the A3 event and the A5 event, and successively configures each of the other second base stations adjacent to the coverage area of the target second base station as a neighbor of the target second base station and configures a neighbor switching strategy based on the A3 event, wherein the target second base station is any one of the plurality of second base stations.

[0077] The A3 event is an important measurement event in a 5G network, used to trigger handover between cells. The basic principle of the A3 event is that when the signal quality of a neighbor cell is higher than that of a serving cell by a preset offset, handover is triggered. The offset can be positive or negative, depending on the network configuration. The A5 event is also a measurement event used to trigger cell handover. The A5 event is characterized by combining the deterioration of the signal quality of the serving cell and the improvement of the signal quality of one or more neighbor cells. Specifically, the A5 event is triggered when the signal quality of the serving cell is lower than a preset threshold (Thresh1) and the signal quality of at least one neighbor cell is higher than another preset threshold (Thresh2).

[0078] Optionally, the management center is further configured to test the communication state of the terminal in the target area; if there is a communication abnormality problem caused by cell coverage, the first prompt information is sent to the target object, the first prompt information prompting the need to reselect the plurality of base stations for networking; if there is a communication abnormality problem caused by data transmission rate, the second prompt information is sent to the target object, the second prompt information prompting the need to adjust the data transmission configuration parameters of each base station in the current networking.

[0079] As an optional implementation, in order to further iteratively optimize the cell radius and time advance of each base station, in the case of random access failure, the target neighbor base station sends a failure notification message to the source base station, and determines the access distance between the terminal and the target neighbor base station according to the time advance reported by the terminal when requesting to access the target neighbor base station. If the access distance is greater than the cell configuration radius of the target neighbor base station, the time advance is reported to the management center, the management center adds the time advance to the sub-database corresponding to the target neighbor base station in the base station group database, and adds one to the total number of time advances reported in the sub-database. According to the multiple time advances reported by each base station, the cell configuration radius of each base station is adjusted. Specifically, when the total number of time advances reported by any base station exceeds a preset threshold, the access distances corresponding to the time advances reported by the base station are determined, and the average of the multiple access distances is determined. If the average is greater than the preset maximum cell radius corresponding to the base station, the cell configuration radius of the base station is adjusted to the preset maximum cell radius. If the average is not greater than the preset maximum cell radius, the cell configuration radius of the base station is adjusted to the average.

[0080] It should be noted that the implementation steps of the neighbor cell switching method in the embodiments of the present application correspond to the implementation process of each module in the wireless communication system in Embodiment 1. Since Embodiment 1 has been described in detail, the details not embodied in this embodiment can be referred to Embodiment 1, and will not be described in detail here.

[0081] Embodiment 3

[0082] On the basis of the wireless communication system provided in Embodiment 1, the embodiments of the present application further provide a neighbor cell switching method applied to a base station. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that here.

[0083] Figure 7 is a flowchart of a neighbor cell switching method provided by the embodiments of the present application, as shown in Figure 7 the method comprises the following steps:

[0084] Step S702, obtaining the measurement report reported by each terminal accessing the base station, wherein the type of the base station includes: a first base station with 5G ultra-remote coverage or a second base station without 5G ultra-remote coverage;

[0085] Step S704, for each terminal, if the measurement report of the terminal triggers the neighbor cell switching strategy of the base station, the neighbor base stations corresponding to the base station are sorted in descending order of communication quality according to the measurement report of the terminal;

[0086] Step S706, according to the ranking results, attempt to switch the terminal to the highest communication quality of the neighbor base station, if the switch fails to attempt to switch the terminal to the next neighbor base station in the ranking results, until the switch is successful; wherein, each failed to switch the neighbor base station for the access distance caused by the switch failure, the terminal and the time advance corresponding to the failed to switch the neighbor base station are reported to the control center; the control center is used to adjust the cell radius of each base station according to the multiple time advance reported by each base station.

[0087] The steps of the neighbor switching method are described below in combination with the specific implementation process.

[0088] Optionally, each base station acquires the measurement report reported by each terminal of the access base station, wherein the measurement report includes: the signal quality parameters and the time advance of each neighbor base station measured by the terminal, wherein the type of signal quality parameter includes at least one of the following: reference signal received power, reference signal received quality, signal to interference plus noise ratio; for each terminal, the communication quality of each neighbor base station corresponding to the neighbor relationship of the base station is determined according to the measurement report of the terminal.

[0089] For each terminal, if the measurement report of the terminal triggers the neighbor switching strategy of the base station, the base station sorts each neighbor base station corresponding to the base station according to the communication quality from high to low according to the measurement report of the terminal; then according to the ranking results, attempt to switch the terminal to the highest communication quality of the neighbor base station, if the switch fails to attempt to switch the terminal to the next neighbor base station in the ranking results, until the switch is successful; wherein, each failed to switch the neighbor base station in the access distance caused by the switch failure, the terminal and the time advance corresponding to the failed to switch the neighbor base station are reported to the control center.

[0090] Optionally, in the process of attempting to switch the terminal to the target neighbor base station, the source base station sends a handover request message to the target neighbor base station, and receives a handover request acknowledgement message feedback by the target neighbor base station, and then sends a radio resource control reconfiguration message to the terminal; the terminal responds to the radio resource control reconfiguration message and sends a random access request message to the target neighbor base station.

[0091] In case of random access failure, the target neighbor cell base station sends a failure notification message to the source base station, and determines an access distance between the terminal and the target neighbor cell base station according to the timing advance reported by the terminal when the terminal requests to access the target neighbor cell base station, and if the access distance is greater than a cell configuration radius of the target neighbor cell base station, the timing advance is reported to the management center; the management center adds the timing advance to a sub-database corresponding to the target neighbor cell base station in the base station group database, and adds one to the total number of the timing advances reported in the sub-database; the source base station responds to the failure notification message and continues to attempt to hand over the terminal to the next target neighbor cell base station; in case of successful random access, the terminal sends a radio resource control reconfiguration complete message to the target neighbor cell base station; the target neighbor cell base station responds to the radio resource control reconfiguration complete message, sends a path switching request message to an access and mobility management function network element, and receives a path switching confirmation message fed back by the access and mobility management function network element, and then sends a terminal context release message to the source base station.

[0092] It should be noted that each implementation step of the neighbor cell handover method in the embodiments of the present application corresponds to the implementation process of each module in the wireless communication system in Embodiment 1, and since the detailed description has been made in Embodiment 1, the details not embodied in the present embodiment can be referred to Embodiment 1, and will not be described in more detail here.

[0093] Embodiment 4

[0094] According to the embodiments of the present application, a computer program product is also provided, which includes a computer program, wherein the computer program is executed by a processor to implement the neighbor cell handover method in Embodiment 2 or Embodiment 3.

[0095] According to the embodiments of the present application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein a device where the non-volatile storage medium is located executes the neighbor cell handover method in Embodiment 2 or Embodiment 3 by running the computer program.

[0096] According to the embodiments of the present application, a processor is also provided, which is used to run a computer program, wherein the computer program is executed to implement the neighbor cell handover method in Embodiment 2 or Embodiment 3.

[0097] According to the embodiments of the present application, an electronic device is also provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the neighbor cell handover method in Embodiment 2 or Embodiment 3 by the computer program.

[0098] Specifically, the computer program running time can further implement the following steps: obtaining the measurement report reported by each terminal accessing the base station, wherein the type of the base station includes: the first base station with 5G ultra-remote coverage opened or the second base station with 5G ultra-remote coverage not opened; for each terminal, if the measurement report of the terminal triggers the adjacent area handover strategy of the base station, the adjacent area base stations corresponding to the base station are sorted in descending order of communication quality according to the measurement report of the terminal; according to the sorting result, the terminal is attempted to be switched to the adjacent area base station with the highest communication quality, and if the switching fails, the terminal is attempted to be switched to the next adjacent area base station in the sorting result until the switching succeeds; each failed adjacent area base station is configured to report the time advance corresponding to the terminal and the failed adjacent area base station to the control center when the switching fails due to the access distance; and the control center is configured to adjust the cell radius of each base station according to the total number of time advances reported by each base station.

[0099] Specifically, the computer program running time can further implement the following steps: obtaining the measurement report reported by each terminal accessing the base station, wherein the type of the base station includes: the first base station with 5G ultra-remote coverage opened or the second base station with 5G ultra-remote coverage not opened; for each terminal, if the measurement report of the terminal triggers the adjacent area handover strategy of the base station, the adjacent area base stations corresponding to the base station are sorted in descending order of communication quality according to the measurement report of the terminal; according to the sorting result, the terminal is attempted to be switched to the adjacent area base station with the highest communication quality, and if the switching fails, the terminal is attempted to be switched to the next adjacent area base station in the sorting result until the switching succeeds; each failed adjacent area base station is configured to report the time advance corresponding to the terminal and the failed adjacent area base station to the control center when the switching fails due to the access distance; and the control center is configured to adjust the cell radius of each base station according to the total number of time advances reported by each base station.

[0100] As an optional implementation, the above-mentioned electronic device can exist in the form of a mobile terminal, a computer terminal or a similar computing device. Figure 8 A hardware structure block diagram of an electronic device for implementing an adjacent area handover method is shown. As shown in FIG. 1, the electronic device includes a processor 101, a memory 102, a bus 103, a communication interface 104, and a power supply 105. Figure 8As shown, the electronic device 80 may include one or more processors 802 (shown as 802a, 802b, ..., 802n in the figure) 802 (processor 802 may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 804 for storing data, and a transmission device 806 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 8 The structure shown is for illustrative purposes only and does not limit the structure of the electronic device described above. For example, electronic device 80 may also include components that are more... Figure 8 The more or fewer components shown, or having the same Figure 8 The different configurations shown.

[0101] It should be noted that the aforementioned one or more processors 802 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element of the electronic device 80. As involved in the embodiments of this application, the data processing circuits serve as a processor control mechanism (e.g., selection of a variable resistor termination path connected to an interface).

[0102] The memory 804 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the neighbor cell handover method in this embodiment. The processor 802 executes various functional applications and data processing by running the software programs and modules stored in the memory 804, thereby implementing the above-mentioned application vulnerability detection method. The memory 804 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 804 may further include memory remotely located relative to the processor 802, and these remote memories can be connected to the electronic device 80 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0103] The transmission device 806 is configured to receive or send data via a network. The network can include a wireless network provided by a communication provider of the electronic device 80. In one embodiment, the transmission device 806 includes a network interface controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one embodiment, the transmission device 806 can be a radio frequency (RF) module that is configured to communicate with the Internet wirelessly.

[0104] The display can be a touch screen liquid crystal display (LCD) that enables a user to interact with a user interface of the electronic device 80.

[0105] The above-mentioned embodiment numbers are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0106] In the above-mentioned embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0107] In the several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the device embodiment described above is only schematic. For example, the division of the units can be a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0108] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0109] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The above integrated unit can be realized in the form of hardware or in the form of software functional unit.

[0110] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0111] The above is only the preferred embodiment of the present application. It should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A wireless communication system, characterized by The system comprises: a management and control center, a plurality of base stations and a plurality of terminals in a network, types of the plurality of base stations comprising: a first base station with 5G ultra-remote coverage enabled and a second base station without 5G ultra-remote coverage enabled, wherein the management and control center is configured to acquire base station information of the plurality of base stations in a target area selected by a target object, construct a base station group database according to the base station information, and configure a neighbor relation and a neighbor handover strategy for each of the base stations; each base station is configured to acquire a measurement report reported by each terminal accessing the base station; for each terminal, if the measurement report of the terminal triggers the neighbor handover strategy of the base station, the base station sorts each neighbor base station corresponding to the base station according to the communication quality from high to low according to the measurement report of the terminal, attempts to hand over the terminal to the neighbor base station with the highest communication quality according to the sorting result, and if the handover fails, attempts to hand over the terminal to the next neighbor base station in the sorting result until the handover is successful; wherein each neighbor base station with handover failure is configured to report a timing advance corresponding to the terminal and the neighbor base station with handover failure to the management and control center when the handover fails due to access distance. The management and control center is further configured to count the total number of timing advances reported by each base station; for each base station, if the total number of timing advances reported by the base station exceeds a preset threshold, the cell radius of the base station is adjusted according to a plurality of timing advances reported by the base station.

2. The system of claim 1, wherein the management and control center is configured to acquire base station information of the plurality of base stations in the target area selected by the target object, wherein the base station information at least includes: base station number, physical cell identifier, 5G ultra-remote coverage attribute and cell configuration radius; the plurality of base stations are networked and the base station group database is constructed, wherein the base station group database includes a sub-database corresponding to each base station, and the sub-database includes: the base station information of the base station, each timing advance reported by the base station and the total number of reported timing advances.

3. The system of claim 1, wherein the management and control center is further configured to turn off the automatic neighbor relation function of the plurality of base stations; for each target first base station, each of the other first base stations is configured as a neighbor of the target first base station and a neighbor handover strategy based on A3 event is configured, each of the second base stations is configured as a neighbor of the target first base station and a neighbor handover strategy based on the combination of A3 event and A5 event is configured, wherein the target first base station is any one of the plurality of first base stations; for each target second base station, each of the first base stations is configured as a neighbor of the target second base station and a neighbor handover strategy based on the combination of A3 event and A5 event is configured, and each of the other second base stations adjacent to the coverage area of the target second base station is configured as a neighbor of the target second base station and a neighbor handover strategy based on A3 event is configured, wherein the target second base station is any one of the plurality of second base stations.

4. The system of claim 1, wherein the management and control center is further configured to test a communication state of the terminal in the target area, and send first prompt information to the target object if there is a communication abnormality problem caused by cell coverage, wherein the first prompt information is used to prompt that a plurality of base stations of the network need to be reselected, and send second prompt information to the target object if there is a communication abnormality problem caused by data transmission rate, wherein the second prompt information is used to prompt that data transmission configuration parameters of each base station of the current network need to be adjusted.

5. The system of claim 1, wherein each base station is configured to acquire a measurement report reported by each terminal accessing the base station, wherein the measurement report comprises signal quality parameters and time advance of each neighboring base station measured by the terminal, and the type of the signal quality parameters comprises at least one of the following: reference signal received power, reference signal received quality, and signal to interference plus noise ratio; and for each terminal, the communication quality of each neighboring base station corresponding to the neighboring relation of the base station is determined according to the measurement report of the terminal. In a process of attempting to handover the terminal to a target neighboring base station by the source base station, the source base station is configured to send a handover request message to the target neighboring base station, receive a handover request acknowledgement message fed back by the target neighboring base station, send a radio resource control reconfiguration message to the terminal, and send a terminal context release message to the target neighboring base station in response to a path switch acknowledgement message fed back by an access and mobility management function network element in response to a radio resource control reconfiguration complete message sent by the terminal in response to the radio resource control reconfiguration message in a case that random access succeeds.

6. The system of claim 2, wherein, the terminal is configured to send a random access request message to the target neighboring base station in response to the radio resource control reconfiguration message, and send a radio resource control reconfiguration complete message to the target neighboring base station in a case that random access succeeds. the target neighboring base station is configured to send a path switch request message to the access and mobility management function network element in response to the radio resource control reconfiguration complete message, receive the path switch acknowledgement message fed back by the access and mobility management function network element, and send the terminal context release message to the source base station. in a case that random access of the terminal fails, the target neighboring base station is configured to send a failure notification message to the source base station, determine an access distance between the terminal and the target neighboring base station according to a time advance reported by the terminal when the terminal requests to access the target neighboring base station, and report the time advance to the management and control center if the access distance is greater than a cell configuration radius of the target neighboring base station. the management and control center is configured to add the time advance to a sub-database corresponding to the target neighboring base station in the base station group database, and add one to a total number of the time advances reported in the sub-database. the source base station is configured to continue to attempt to handover the terminal to a next target neighboring base station in response to the failure notification message.

7. The system of claim 1, wherein the management and control center is configured to determine access distances corresponding to each time advance reported by any base station when a total number of the time advances reported by the base station exceeds the preset threshold, and determine an average value of a plurality of the access distances. ​ ​ ​ If the average value is greater than a preset maximum cell radius corresponding to the base station, a cell configuration radius of the base station is adjusted to the preset maximum cell radius; if the average value is not greater than the preset maximum cell radius, the cell configuration radius of the base station is adjusted to the average value.

8. A neighbor cell handover method, applied in a control center, characterized in that, Comprise: Obtaining base station information of a plurality of base stations in a target region selected by a target object, constructing a base station group database according to the base station information, and configuring a neighbor cell relationship and a neighbor cell handover strategy for each base station; wherein the types of the plurality of base stations include a first base station with 5G ultra-remote coverage opened and a second base station without 5G ultra-remote coverage opened; each base station is configured to obtain a measurement report reported by each terminal accessing the base station, for each terminal, if the measurement report of the terminal triggers the neighbor cell handover strategy of the base station, the base station corresponding to each neighbor cell base station is sorted according to the communication quality from high to low according to the measurement report of the terminal, and the terminal is attempted to be switched to the neighbor cell base station with the highest communication quality according to the sorting result, if the switching fails, the terminal is attempted to be switched to the next neighbor cell base station in the sorting result, until the switching succeeds; each failed neighbor cell base station is configured to report a time advance corresponding to the terminal and the failed neighbor cell base station to the management center when the switching fails due to access distance; Statistically counting the total number of time advances reported by each base station, for each base station, if the total number of time advances reported by the base station exceeds a preset threshold, adjusting the cell configuration radius of the base station according to the plurality of time advances reported by the base station.

9. A method for handover of a neighbor cell, applied to a base station, the method comprising: Comprise: Obtaining a measurement report reported by each terminal accessing a base station, wherein the type of the base station includes a first base station with 5G ultra-remote coverage opened or a second base station without 5G ultra-remote coverage opened For each terminal, if the measurement report of the terminal triggers the neighbor cell handover strategy of the base station, the base station corresponding to each neighbor cell base station is sorted according to the communication quality from high to low according to the measurement report of the terminal; According to the sorting result, the terminal is attempted to be switched to the neighbor cell base station with the highest communication quality, if the switching fails, the terminal is attempted to be switched to the next neighbor cell base station in the sorting result, until the switching succeeds; wherein each failed neighbor cell base station is configured to report a time advance corresponding to the terminal and the failed neighbor cell base station to the management center when the switching fails due to access distance; the management center is configured to adjust the cell configuration radius of each base station according to the plurality of time advances reported by each base station.

10. An electronic device, comprising: Comprise: A memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the neighbor cell handover method of claim 8 or claim 9 through the computer program.

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