Ground network neighbor cell information acquisition method, device and network system

Abstract

The invention provides a ground network neighbor cell information acquisition method and device and a network system, and relates to the technical field of wireless communication, and the method not only can guarantee the accuracy of a TN neighbor cell switching target determined by an NTN base station, but also can avoid the frequency point and cell information of a single TN base station from being out of a domain, reduces the leakage risk of the position information of the TN base station, and improves the user experience. And the network security of the NTN is improved. Moreover, in the method, the satellite-ground cooperation unit does not directly participate in the real-time interaction process of the NTN terminal and the NTN base station, so that the time delay of the NTN terminal signaling is reduced, the reliability of the NTN network service is improved on the whole, and the NTN user experience is improved. In addition, according to the method, the requirements for the computing power and storage of the NTN base station are reduced, and the calculation amount of the NTN base station is reduced. The condition of cell PCI conflict is considered, and the accuracy of the TN neighbor cell switching target is improved.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a method, apparatus and network system for obtaining neighboring cell information in a terrestrial network. Background Technology

[0002] When a connected non-terrestrial network (NTN) terminal is located within the coverage area of ​​a terrestrial network (TN), and the service scenario requires the NTN terminal to migrate to the TN, the NTN base station needs to send the frequency and cell information of TN neighboring cells to the NTN terminal. Specifically, based on the frequency band of the NTN terminal, the NTN base station should send the frequency and cell information of TN neighboring cells within that frequency band.

[0003] Because of the large coverage area of ​​a TN cell, a TN neighbor cell may encompass multiple TN cells, resulting in potential neighbor cell relationships between multiple TN cells and the NTN base station. Furthermore, due to factors such as improper planning, automatic adjustment of neighbor cell relationships, network expansion and upgrades, and physical environment, Physical Cell Identifier (PCI) conflicts may occur. This necessitates that the NTN terminal measure more TN cells and, after obtaining the PCI of the TN cells, further execute an air interface global cell identifier (CGI) lookup process to determine a suitable handover target.

[0004] To ensure measurement accuracy, existing TN neighbor cell information acquisition methods incorporate a Space-Earth Coordination Unit (SECU) into the NTN terminal's measurement workflow. The SECU possesses satellite orbit estimation capabilities and a knowledge base of TN base station distribution information. After receiving location information reported by the NTN terminal, the NTN base station interacts with the SECU. Based on the location information provided by the NTN terminal, the SECU accurately obtains the frequency points and cell information of surrounding TN base stations and sends this information to the NTN base station. Subsequently, the NTN base station can selectively send measurement frequency points and cell information for the TN neighbor cells of that specific NTN terminal. This method not only reduces unnecessary measurement actions but also simplifies the CGI query process, thereby improving the overall system efficiency and accuracy.

[0005] However, in regeneration mode, the NTN base station is on a satellite, while the satellite coordination unit is on the ground. NTN terminal signaling-level interaction will face latency issues with both the air interface (UU) and the dual air interface of the power supply, reducing the reliability of NTN network services. Due to the large number of NTN terminals and the high mobility of NTN base stations, a large number of NTN terminals will centrally access and require interaction with the satellite-ground coordination unit, increasing the demands on the satellite-ground coordination unit and the power supply link.

[0006] Furthermore, since NTN and TN base stations belong to different networks, if the frequency and cell information of the TN base station are sent to the NTN base station, on the one hand, the frequency and cell information of the TN base station will be out of the domain, that is, transmitted through two different networks, NT and NTN, which increases the risk of leakage of the location information of the TN base station and poses a security problem. On the other hand, since the computing power and storage of the NTN base station are limited, it cannot perform such computationally intensive operations, which will cause the NTN base station to operate under overload. Summary of the Invention

[0007] This application provides a method, apparatus, and network system for obtaining neighboring cell information in a terrestrial network, in order to address the deficiencies existing in related technologies.

[0008] This application provides a method for obtaining neighboring cell information in a terrestrial network, applied to an NTN base station, including: Receive location information from the NTN terminal; Based on the location information, the frequency point and cell information of the target TN cell cluster where the NTN terminal is located are determined by applying the TN cell cluster information at the wave position level within the orbital coverage area of ​​the NTN base station, and neighbor cell measurement information is sent to the NTN terminal; the TN cell cluster information is predetermined and sent by the satellite-ground coordination unit; the neighbor cell measurement information is determined based on the frequency point of the target TN cell cluster. The system receives the TN neighbor cell PCI reported by the NTN terminal after measurement based on the neighbor cell measurement information, and searches for the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster. Based on the number of CGIs, the TN neighbor cell handover target of the NTN terminal is determined.

[0009] This application also provides a method for obtaining neighboring cell information in a terrestrial network, applied to a satellite-ground cooperative unit, including: It is determined that the NTN base station is connected to the gateway station, and the orbital coverage area of ​​the NTN base station is determined based on the ephemeris information of the NTN base station; Using wave positions as the unit, the TN cells within the orbital coverage area are divided into at least one TN cell cluster, and the TN cell cluster information of the at least one TN cell cluster is determined; The TN cell cluster information is sent to the NTN base station.

[0010] This application also provides a terrestrial network neighbor cell information acquisition device, applied to an NTN base station, comprising: The information receiving module is used to receive the location information of the NTN terminal; The information delivery module is used to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located based on the location information and the TN cell cluster information at the wave position level within the orbital coverage area of ​​the NTN base station, and to send neighbor cell measurement information to the NTN terminal; the TN cell cluster information is predetermined and sent by the satellite-ground coordination unit; the neighbor cell measurement information is determined based on the frequency point of the target TN cell cluster; The PCI lookup module is used to receive the TN neighbor cell PCI reported by the NTN terminal after measurement based on the neighbor cell measurement information, and to look up the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster. The TN neighbor cell determination module is used to determine the TN neighbor cell handover target of the NTN terminal based on the number of CGIs.

[0011] This application also provides a terrestrial network neighbor cell information acquisition device, applied to a satellite-ground cooperative unit, comprising: The coverage area determination module is used to determine the connection between the NTN base station and the gateway station, and to determine the orbital coverage area of ​​the NTN base station based on the ephemeris information of the NTN base station. The cell division module is used to divide the TN cells within the orbital coverage area into at least one TN cell cluster based on the wave position, and to determine the TN cell cluster information of the at least one TN cell cluster. The information transmission module is used to send the TN cell cluster information to the NTN base station.

[0012] This application also provides a network system, including: an NTN terminal, an NTN base station, and a satellite-ground cooperative unit; The NTN base station is communicatively connected to the NTN terminal and the satellite-ground coordination unit, respectively. The NTN terminal is used to send location information to the NTN base station; The NTN base station is used to perform the terrestrial network neighbor cell information acquisition method as described in any one of claims 1-5; The satellite-ground coordination unit is used to execute the ground network neighbor cell information acquisition method as described in any one of claims 6-11.

[0013] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the terrestrial network neighbor cell information acquisition method as described above.

[0014] This application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the terrestrial network neighbor cell information acquisition method as described above.

[0015] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the terrestrial network neighbor cell information acquisition method as described above.

[0016] The terrestrial network neighbor cell information acquisition method, apparatus, and network system provided in this application determine the frequency and cell information of the target TN cell cluster where the NTN terminal is located by using TN cell cluster information pre-determined and transmitted by the satellite-ground coordination unit. This not only ensures the accuracy of the TN neighbor cell handover target determined by the NTN base station, but also avoids the out-of-domain frequency and cell information of a single TN base station, reducing the risk of leakage of TN base station location information and improving the network security of the NTN network. Moreover, the satellite-ground coordination unit does not directly participate in the real-time interaction between the NTN terminal and the NTN base station; it only needs to establish a communication connection with the NTN base station once in advance. This reduces the signaling latency of the NTN terminal, increases the overall reliability of NTN network services, and improves the NTN user experience. Furthermore, this method only needs to filter the frequency and cell information of the target TN cell cluster from the TN cell cluster information, without processing all the frequency and cell information of the TN base station. This also greatly reduces the computing power and storage requirements of the NTN base station, reducing the computational load of the NTN base station. This method finally combines the number of CGIs to determine the TN neighbor cell handover target for the NTN terminal, taking into account the situation of cell PCI conflict, and further improves the accuracy of the TN neighbor cell handover target. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the interaction process between SECU, NTN terminal and NTN base station in the existing TN neighbor cell information acquisition method.

[0019] Figure 2This is one of the flowcharts illustrating the method for obtaining neighboring cell information in a terrestrial network provided in this application.

[0020] Figure 3 This is a schematic diagram of the interaction process between the NTN base station, NTN terminal, and SECU when the TN cell cluster information provided in this application is obtained by the SECU through the first or second partitioning method.

[0021] Figure 4 This is a schematic diagram of the interaction process between the NTN base station, NTN terminal, and SECU when the TN cell cluster information provided in this application is jointly determined by the SECU through the first division method and the second division method.

[0022] Figure 5 This is the second flowchart illustrating the method for obtaining neighboring cell information in a terrestrial network provided in this application.

[0023] Figure 6 This is a flowchart illustrating the first division method in the terrestrial network neighbor cell information acquisition method provided in this application.

[0024] Figure 7 This is a flowchart illustrating the second partitioning method in the terrestrial network neighbor cell information acquisition method provided in this application.

[0025] Figure 8 This is a schematic diagram of each TN cell cluster and TN cell within each wavelength position of the NTN base station in the terrestrial network neighbor cell information acquisition method provided in this application.

[0026] Figure 9 This is one of the structural schematic diagrams of the terrestrial network neighbor cell information acquisition device provided in this application.

[0027] Figure 10 This is the second schematic diagram of the terrestrial network neighbor cell information acquisition device provided in this application.

[0028] Figure 11 This is a schematic diagram of the network system provided in this application.

[0029] Figure 12 This is a schematic diagram of the structure of the electronic device provided in this application. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] like Figure 1 As shown, existing TN neighbor cell information acquisition methods involve the Space-Earth Coordination Unit (SECU) in the NTN terminal (User Equipment) measurement service process. The SECU possesses satellite orbit estimation capabilities and a knowledge base of TN base station (gNB) distribution information.

[0032] After the NTN UE accesses the NTN gNB, the NTN gNB can send a location query request to the NTN UE. The NTN UE then reports its location, and the NTN gNB receives the reported location information. Subsequently, the NTN gNB interacts with the SECU, sending an NTN UE neighboring TN cell query request. Based on the location information provided by the NTN UE, the SECU can accurately obtain the frequency points and cell information of TN gNBs in the vicinity of that location and respond to the NTN UE neighboring TN cell query, sending the obtained information back to the NTN gNB. Then, the NTN gNB can selectively send measurement frequency points and cell information of TN neighboring cells for that NTN UE. The NTN UE then performs TN neighboring cell PCI measurement and reporting based on the measurement frequency points. After receiving the TN neighboring cell PCI, the NTN gNB can initiate a handover procedure, executing an air interface CGI query process to determine a suitable handover target. This method not only reduces unnecessary measurement actions but also simplifies the CGI query process, thereby improving the overall system efficiency and accuracy. However, when configuring TN neighbor cells in NTN gNB, this method faces several challenges, including latency issues during UU and dual air interface interactions at the signaling level of a large number of NTN UEs, insufficient computing power and storage of NTN base stations to support the large number of TN neighbor cells per wavelength, high probability of PCI collisions, and inability to export frequency and cell information of TN base stations.

[0033] Based on this, this application provides a method for obtaining neighboring cell information of a terrestrial network to address the aforementioned problems existing in the prior art.

[0034] Figure 2 This is a flowchart illustrating a method for obtaining neighboring cell information in a terrestrial network, as provided in an embodiment of this application. Figure 2 As shown, this method is applied to an NTN base station and includes: S21, Receive the location information of the NTN terminal; S22, based on the location information, using the TN cell cluster information at the wavelet level within the orbital coverage area of ​​the NTN base station, the frequency point and cell information of the target TN cell cluster where the NTN terminal is located are determined, and neighbor cell measurement information is sent to the NTN terminal; the TN cell cluster information is predetermined and sent by the satellite-ground coordination unit; the neighbor cell measurement information is determined based on the frequency point of the target TN cell cluster; S23, receive the TN neighbor cell PCI reported by the NTN terminal after measurement based on the neighbor cell measurement information, and search for the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster; S24, based on the number of CGIs, determine the TN neighbor cell handover target of the NTN terminal.

[0035] Specifically, the method for obtaining neighboring cell information of a terrestrial network provided in this application embodiment is executed by a terrestrial network neighboring cell information obtaining device, which can be configured in an NTN base station.

[0036] First, step S21 is executed. After the NTN terminal accesses the NTN base station, the NTN base station can receive the location information of the NTN terminal, which can be latitude and longitude information.

[0037] Then, step S22 is executed, which uses the location information of the NTN terminal and the TN cell cluster information at the wavelet level within the track coverage area of ​​the NTN base station to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located.

[0038] Among them, the TN cell cluster information can be obtained by the SECU in advance by dividing the TN cells under each wave position within the track coverage area of ​​the NTN base station and reporting it to the NTN base station.

[0039] The orbital coverage area of ​​an NTN base station can include multiple wavelength positions, each corresponding to one or more TN cell clusters, and each TN cell cluster has TN cell cluster information. Wavelength-level TN cell cluster information refers to the TN cell cluster information of each TN cell cluster under each wavelength position.

[0040] TN cell cluster information may include the cluster identifier (ID), cluster location information, shape, and information about the TN cells contained within the cluster. Cluster location information may include the cluster's latitude and longitude. TN cell information may include the TN cell's PCI, Tracking Area Code (TAC), Synchronization Signal Block Measurement Timing Configuration (SMTC), CGI, and the carrier frequency, spectrum bandwidth, coverage parameters, and status information used by the cell. Coverage parameters may include transmit power and antenna configuration, while status information includes whether the cell is active and its load status.

[0041] The location information of the NTN terminal is compared with the cluster location information of each TN cell cluster to determine the target TN cell cluster where the NTN terminal is located, as well as the frequency point and cell information of the target TN cell cluster. The NTN base station can determine the measurement frequency point based on the frequency point of the target TN cell cluster, that is, select all or some of the frequency points from the frequency points of the target TN cell cluster as the measurement frequency point. Neighbor cell measurement information is determined based on the measurement frequency point and then sent to the NTN terminal.

[0042] For example, an NTN base station can combine at least one of the following information to obtain neighboring cell measurement information: measurement frequency point, measurement event, report configuration, measurement quantity, and measurement gap. This neighboring cell measurement information is used to guide the NTN terminal in performing measurement and control commands. Measurement events are the conditions that trigger the UE to report measurement data; report configuration includes reporting standards (periodic or event-triggered); and measurement quantities include reference signal received power (RSRP), received quality (RSRQ), and signal-to-interference-plus-noise ratio (SINR). The measurement gap is a reserved time period used to instruct the NTN terminal to perform inter-frequency or inter-system measurements.

[0043] The NTN terminal receives neighbor cell measurement information, measures the TN neighbor cells at the measurement frequency point based on the neighbor cell measurement information, obtains the TN neighbor cells, and reports the TN neighbor cell PCI to the NTN base station.

[0044] The NTN base station then proceeds to step S23, receiving the TN neighbor cell PCI reported by the NTN terminal after measurement based on neighbor cell measurement information, and searching for the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster where the NTN terminal is located. A TN neighbor cell PCI may only include one, but due to PCI conflicts, a TN neighbor cell PCI may correspond to multiple CGIs, meaning multiple TN neighbor cells share the same PCI.

[0045] The NTN base station finally executes step S24, which uses the number of CGIs to determine the TN neighbor cell handover target for the NTN terminal. Here, since the number of CGIs may include one or more, different methods can be used to determine the TN neighbor cell handover target for the NTN terminal depending on the number of CGIs. For example, when there is only one CGI, it is assumed that there is no PCI conflict, and the cell identified by the CGI can be directly used as the TN neighbor cell handover target for the NTN terminal. When there are multiple CGIs, it is assumed that there is a cell PCI conflict, and further CGI measurement is required through the NTN terminal. The NTN base station determines the identified cell based on the CGI information obtained from the CGI measurement by the NTN terminal and uses it as the TN neighbor cell handover target for the NTN terminal.

[0046] The terrestrial network neighbor cell information acquisition method provided in this application embodiment first uses the location information of the NTN terminal to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located from the TN cell cluster information at the wavelet level within the orbital coverage range of the NTN base station. Then, it sends neighbor cell measurement information to the NTN terminal to instruct it to perform measurements and report the TN neighbor cell PCI. The method then searches for the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster, and combines this with the number of CGIs to determine the TN neighbor cell handover target for the NTN terminal. This method uses TN cell cluster information pre-determined and sent by the satellite-ground coordination unit to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located. This not only ensures the accuracy of the TN neighbor cell handover target determined by the NTN base station, but also avoids the out-of-domain frequency point and cell information of a single TN base station, reducing the risk of leakage of the TN base station's location information and improving the network security of the NTN network. Furthermore, in this method, the satellite-ground coordination unit does not directly participate in the real-time interaction between the NTN terminal and the NTN base station. It only needs to establish a communication connection with the NTN base station once in advance. This reduces the signaling latency of the NTN terminal, increases the overall reliability of NTN network services, and improves the NTN user experience. In addition, this method only needs to filter the frequency points and cell information of the target TN cell cluster from the TN cell cluster information, without processing all frequency points and cell information of the TN base station. This also significantly reduces the computing power and storage requirements of the NTN base station, reducing its computational load. Finally, this method combines the number of CGIs to determine the TN neighbor cell handover target for the NTN terminal, considering the possibility of cell PCI conflicts, further improving the accuracy of the TN neighbor cell handover target.

[0047] Based on the above embodiments, the TN cell cluster information is obtained based on a first partitioning method or a second partitioning method; The first division method is based on the geographical location of each wavelength within the orbital coverage area; the second division method is based on the clustering of TN cells under each wavelength within the orbital coverage area according to the PCI distribution.

[0048] Specifically, in the embodiments of this application, the TN cell clusters can be obtained through either a first partitioning method or a second partitioning method. Under the first partitioning method, the shapes of the resulting TN cell clusters are consistent. Under the second partitioning method, the shapes of the resulting TN cell clusters are inconsistent, and the PCI in each TN cell cluster obtained through the second partitioning method is unique.

[0049] The first method of division involves equally dividing the geographical location of each wave position within the orbital coverage area. This could include, for example, the following steps: Obtain the cluster spacing, which can be preset as needed.

[0050] For any wave position within the orbital coverage area, the total number of clusters that can be placed within that wave position is calculated using the coverage diameter and cluster spacing. Here, the number of cluster rows and columns that can be placed within that wave position can be directly determined based on the ratio of the coverage diameter to the cluster spacing, thus obtaining the total number of clusters. Dividing according to the first method, the clusters within any wave position can be evenly arranged in rows and columns, and the total number of clusters can be the product of the number of cluster rows and the number of cluster columns.

[0051] Using the cluster spacing and the center position of any wavelength, cluster centers within any wavelength can be generated. The center position of any wavelength can be used as the first cluster center. The remaining cluster centers can be obtained by shifting the first cluster center forward, backward, left, and right using the cluster spacing. Here, it is necessary to ensure that each generated cluster center is within the coverage area of ​​the wavelength.

[0052] By utilizing the location information of each cluster center and each TN cell within any given wavelength, the TN cells belonging to each cluster within any given wavelength can be determined. For example, by calculating the distance between the location information of each TN cell and each cluster center, TN cells whose distance is less than a given threshold can be assigned to the corresponding cluster center.

[0053] Finally, the TN cells belonging to each cluster within any given wavelength are assigned to obtain each TN cell cluster, and thus the information of each TN cell cluster is obtained.

[0054] The second classification method involves clustering TN cells under each wavelength within the orbital coverage area according to the PCI distribution, where PCI distribution refers to the number of times PCI occurs.

[0055] For example, the second partitioning method may include the following steps: Determine the PCI of all TN cells within the target wavelength, which can be each wavelength within the orbital coverage area of ​​the NTN base station.

[0056] Count the occurrences of each PCI to determine the maximum occurrence count and the number of initial clusters equal to the maximum occurrence count. Each initial cluster can be empty and needs to be continuously filled.

[0057] Each TN cell corresponding to the PCI with the highest occurrence frequency is assigned to an initial cluster, so that each initial cluster is assigned one TN cell. The location information of the TN cell assigned to each initial cluster is used as the cluster center of the initial cluster, and the coverage radius of the TN cell assigned to each initial cluster is used as the cluster radius of the initial cluster.

[0058] The remaining PCIs are traversed in descending order of their occurrence frequency. For each PCI encountered, the distance between each TN cell corresponding to the current PCI and the cluster center of each initial cluster is used to assign each TN cell to the nearest other TN cell that does not contain the current PCI, thus forming a TN cell cluster. The cluster radius is then updated, i.e., the cluster shape is updated, thus determining the TN cell cluster information. Here, the PCI within each TN cell cluster is unique.

[0059] In this embodiment, the satellite-ground coordination unit provides two methods for determining TN cell cluster information. The first partitioning method requires less computing power resources from the NTN base station, while the second partitioning method requires more computing power resources from the NTN base station. Thus, different partitioning methods can be selected according to the computing power capabilities of the NTN base station, thereby achieving flexibility in partitioning method selection and improving the adaptability of the scheme to NTN base stations with different computing power.

[0060] Based on the above embodiments, determining the TN neighbor cell handover target of the NTN terminal based on the number of CGIs includes: If the number of CGIs is 1, then the cell identified by the CGI is determined as the TN neighbor cell handover target; If there are multiple CGIs, CGI measurement information is sent to the NTN terminal, and CGI information reported by the NTN terminal after performing CGI measurement based on the CGI measurement information is received. Based on the CGI information, the TN neighbor cell handover target is determined.

[0061] Specifically, when determining the TN neighbor cell handover target for an NTN terminal, if the number of CGIs is 1, the cell identified by the GI can be directly determined as the handover target for the T in the N neighbor cell.

[0062] If there are multiple CGIs, the NTN base station can first send CGI measurement information to the NTN terminal. The CGI measurement information is used to instruct the NTN terminal to measure the signal quality of multiple CGI-identified cells. The terminal can select the cell with the best signal quality to report its CGI information, or it can sort the CGIs according to the signal quality of the identified cells from high to low and then report them.

[0063] Subsequently, the NTN base station can receive CGI information reported by the NTN terminal after performing CGI measurements based on CGI measurement information, and can determine the TN neighbor cell handover target based on the CGI information. If the CGI information includes one CGI, the NTN base station can directly use the cell identified by that CGI as the TN neighbor cell handover target. If the CGI information includes multiple CGIs, the NTN base station can select one CGI according to the actual situation and use the cell identified by that CGI as the TN neighbor cell handover target.

[0064] In this application embodiment, the cases of having one or more CGIs are considered, and in the case of multiple CGIs, a scheme is given to determine the TN neighbor cell handover target by measuring CGIs through the NTN terminal, which can avoid the occurrence of PCI conflicts.

[0065] As a preferred embodiment, the TN cell cluster information is initialized based on a first division method and updated with new TN cell cluster information every preset period. The new TN cell cluster information is obtained by dividing each TN cell cluster under the specified TN cell cluster wavelength based on a second division method. The designated TN cell cluster is the TN cell cluster with corresponding CGI information determined within the preset period; the first division method is based on the geographical location of each wavelength position within the orbital coverage area; the second division method is based on the clustering of TN cells under each wavelength position within the orbital coverage area according to the PCI distribution.

[0066] Specifically, in this embodiment, the satellite-ground coordination unit can also combine a first partitioning method and a second partitioning method. The first partitioning method is used to perform an initial partitioning to obtain initialized TN cell cluster information, and every preset period, new TN cell cluster information is used to update the information. This new TN cell cluster information is obtained by partitioning each TN cell cluster under the specified TN cell cluster's wavelength using the second partitioning method. It can be understood that the specified TN cell cluster is a TN cell cluster with corresponding CGI information determined within the preset period, i.e., a TN cell cluster with PCI conflict, and the wavelength to which the specified TN cell cluster belongs is the wavelength with PCI conflict.

[0067] Here, the first and second partitioning methods are specifically described in the above embodiments and will not be repeated here. In particular, when using the second partitioning method to partition each TN cell cluster under the specified TN cell cluster to obtain new TN cell cluster information, the target TN cell cluster in the second partitioning method is the TN cell cluster with PCI conflict, that is, the TN cell cluster to which the specified TN cell cluster belongs.

[0068] In this embodiment, by combining the first and second partitioning methods, the function of dynamically adjusting cell clusters is added, which can reduce the probability of PCI collisions, reduce the probability of NTN base stations issuing CGI measurements, and speed up the handover execution time. Moreover, this scheme is suitable for NTN base stations with medium computing power, which can further improve the adaptability of the scheme to NTN base stations with different computing power.

[0069] Based on the above embodiments, receiving the location information of the NTN terminal includes: A location query request is sent to the NTN terminal; the location query request is used to instruct the NTN terminal to report the location information. Receive the location information reported by the NTN terminal based on the location query request.

[0070] Specifically, in the process of receiving the location information of the NTN terminal, the NTN base station can first send a location query request to the NTN terminal, which is used to instruct the NTN terminal to report the location information.

[0071] After receiving a location query request, the NTN terminal responds by reporting its own location information to the NTN base station. The NTN base station then receives this location information.

[0072] In this embodiment of the application, the location information of the NTN terminal is obtained by sending a location query request to the NTN terminal, which can improve the efficiency of obtaining location information.

[0073] Based on the above embodiments, such as Figure 3 The diagram shows the interaction process between the NTN base station, NTN terminal, and SECU when the TN cell cluster information is obtained by the SECU through the first or second partitioning method.

[0074] Figure 3 In this context, when an NTN base station accesses a gateway station, the SECU can obtain TN cell cluster information through either a first or second partitioning method. After establishing a link between the NTN base station and the SECU, the TN cell cluster information is uploaded to the NTN base station. This link establishment process can include physical layer connection establishment, protocol layer interaction, and upper-layer applications.

[0075] After an NTN terminal connects to an NTN base station, the NTN base station sends a location query request to the NTN terminal, and the NTN terminal reports its location information.

[0076] The NTN base station queries the frequency point and cell information of the target TN cell cluster where the NTN terminal is located based on the location information of the NTN terminal.

[0077] NTN base stations send neighbor cell measurement information to NTN terminals.

[0078] The NTN terminal performs measurements based on neighbor cell measurement information and then reports the TN neighbor cell PCI.

[0079] The NTN base station searches for the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster.

[0080] If the TN neighbor cell PCI matches the only neighbor cell in the cluster, meaning there is only one CGI corresponding to the TN neighbor cell PCI, then the NTN base station determines the cell identified by the CGI as the TN neighbor cell handover target and directly initiates the handover, ending the process.

[0081] If the TN neighbor cell PCI hits multiple neighbor cells within the cluster, that is, the CGI corresponding to the TN neighbor cell PCI includes multiple cells, then the NTN base station sends CGI measurement information to the NTN terminal.

[0082] The NTN terminal performs CGI measurements based on the CGI measurement information and then reports the CGI information.

[0083] The NTN base station determines the TN neighbor cell handover target based on CGI information, initiates the handover, and the process ends.

[0084] Based on the above embodiments, such as Figure 4 The diagram shows the interaction process between the NTN base station, NTN terminal, and SECU when the TN cell cluster information is jointly determined by the SECU through the first and second partitioning methods.

[0085] Figure 4 Compared to Figure 3 The difference is: Figure 4 When the NTN base station accesses the gateway station, the SECU initializes the TN cell cluster information using the first partitioning method, and uploads the initialized TN cell cluster information to the NTN base station after the NTN base station establishes a link with the SECU. Afterward, a preset periodic timing is initiated.

[0086] After each preset period ends, the NTN base station sends the designated TN cell cluster to the SECU. The SECU divides the TN cell clusters under the specified TN cell cluster using the second division method to obtain the new TN cell cluster and the new TN cell cluster information, and then uploads the new TN cell cluster information to the NTN base station.

[0087] The NTN base station updates the initialized TN cell cluster information based on the new TN cell cluster information to obtain the updated TN cell cluster information.

[0088] In the next preset period, the NTN base station applies the updated TN cell cluster information obtained in the previous preset period.

[0089] like Figure 5 As shown, based on the above embodiments, this application also provides a method for obtaining neighboring cell information of a ground network, applied to a satellite-ground cooperative unit, including: S31, determine that the NTN base station is connected to the gateway station, and determine the orbital coverage area of ​​the NTN base station based on the ephemeris information of the NTN base station; S32, using wave positions as the unit, divide the TN cells within the orbital coverage area into at least one TN cell cluster, and determine the TN cell cluster information of the at least one TN cell cluster; S33, the TN cell cluster information is sent to the NTN base station.

[0090] Specifically, the method for obtaining neighboring cell information of the ground network provided in this application embodiment is executed by a ground network neighboring cell information acquisition device, which can be configured within the satellite-ground coordination unit.

[0091] First, step S31 is executed. When the NTN base station is connected to the gateway station, the satellite-ground coordination unit can use the ephemeris information of the NTN base station, combined with satellite orbit parameters and the relationship between the satellite and the Earth's surface position, to determine the orbital coverage area of ​​the NTN base station. The ephemeris information of the NTN base station refers to the precise position or trajectory table of the NTN base station during the Global Positioning System (GPS) measurement process, which changes over time and is a function of time.

[0092] Then, step S32 is executed, which divides the TN cells within the orbital coverage area into at least one TN cell cluster based on the wave position, and determines the TN cell cluster information of each TN cell cluster, namely the cluster identifier (ID), cluster location information, shape, and TN cell information contained within the cluster.

[0093] Finally, step S33 is executed to send the TN cell cluster information to the NTN base station.

[0094] The terrestrial network neighbor cell information acquisition method provided in this embodiment is applied to a space-ground coordination unit. First, it determines that the NTN base station is connected to the gateway station. Based on the ephemeris information of the NTN base station, it determines the orbital coverage area of ​​the NTN base station. Then, using wavenumbers as units, it divides the TN cells within the orbital coverage area into at least one TN cell cluster and determines the TN cell cluster information for each cluster. Finally, it sends the TN cell cluster information to the NTN base station. This method utilizes the space-ground coordination unit to determine and send the TN cell cluster information obtained within the orbital coverage area of ​​the NTN base station to the NTN base station when the NTN base station is connected to the gateway station. This avoids the frequency point and cell information of a single TN base station from going out of domain, reducing the risk of leakage of TN base station location information and improving the network security of the NTN network. Moreover, in this method, the space-ground coordination unit does not directly participate in the real-time interaction between the NTN terminal and the NTN base station; it only needs to establish a communication connection with the NTN base station once in advance. This reduces the signaling latency of the NTN terminal, increases the overall reliability of NTN network services, and improves the NTN user experience. Furthermore, the NTN base station can also ensure the accuracy of the determined TN neighbor cell handover target by using the transmitted TN cell cluster information.

[0095] Based on the above embodiments, the step of dividing the TN cells within the orbital coverage area into at least one TN cell cluster, using wave positions as the unit, includes: Based on the first or second division method, the TN cells within the orbital coverage area are divided into at least one TN cell cluster, using wave positions as the unit. The first division method is based on the geographical location of each wavelength within the orbital coverage area; the second division method is based on the clustering of TN cells under each wavelength within the orbital coverage area according to the PCI distribution.

[0096] Specifically, the satellite-ground coordination unit can use either the first or the second division method to divide the TN cells within the orbital coverage area.

[0097] Under the first partitioning method, the shapes of the resulting TN cell clusters are consistent; under the second partitioning method, the shapes of the resulting TN cell clusters are inconsistent.

[0098] The first partitioning method involves evenly dividing the geographical location of each wavelength position within the orbital coverage area. The second partitioning method involves clustering TN cells under each wavelength position within the orbital coverage area according to the PCI distribution, which is the frequency of occurrence of each PCI. The PCI in each TN cell cluster obtained by the second partitioning method is unique.

[0099] In this embodiment, the satellite-ground coordination unit provides two methods for determining TN cell cluster information. The first partitioning method requires less computing power resources from the NTN base station, while the second partitioning method requires more computing power resources from the NTN base station but can avoid PCI conflicts. Thus, different partitioning methods can be selected according to the computing power capabilities of the NTN base station, thereby achieving flexibility in partitioning method selection and improving the adaptability of the scheme to NTN base stations with different computing power.

[0100] Based on the above embodiments, and using the first division method, the TN cells within the orbital coverage area are divided into at least one TN cell cluster, with wave positions as the unit, including: Obtain the cluster spacing; For any wave position within the orbital coverage area, the total number of clusters that can be placed within any wave position is calculated based on the coverage diameter of the wave position and the cluster spacing. Based on the cluster spacing and the center position of any wavelength, the cluster centers within any wavelength are generated, and based on the cluster centers and the position information of each TN cell within any wavelength, the TN cells belonging to each cluster within any wavelength are determined. The TN cells belonging to each cluster within any given wavelength are assigned.

[0101] Specifically, such as Figure 6 As shown, the first division method may include the following steps: Obtain the cluster spacing, which can be preset as needed.

[0102] For any wave position within the orbital coverage area, determine the wave position's identifier (ID), wave position radius, and center position.

[0103] By using the ratio of the wavelength diameter to the cluster spacing, the number of cluster rows and cluster columns that can be placed within the wavelength can be determined, and thus the total number of clusters can be obtained.

[0104] Using the cluster spacing and the center position of a wavelength band, a cluster center can be generated, and it can be determined whether the cluster center is within that wavelength band. If it is not within the wavelength band, a new cluster center is generated; if it is within the wavelength band, the TN cells belonging to the cluster of the cluster center are determined using the cluster center and the location information of each TN cell within that wavelength band. For example, by calculating the distance between the location information of each TN cell and the cluster center, TN cells whose distance is less than a given threshold are assigned to the cluster center.

[0105] Determine whether all cell clusters under the given wavelength have been generated. If not, continue generating cluster centers for the signal. If all have been generated, determine whether all cell clusters under all wavelengths have been generated. If not, continue selecting the next wavelength within the orbital coverage area to generate cell clusters. If all have been generated, the process ends.

[0106] Finally, the TN cells belonging to each cluster within any given wavelength are assigned to obtain each TN cell cluster, and thus the information of each TN cell cluster is obtained.

[0107] In this embodiment of the application, the first division method is used to determine the TN cell cluster information, which requires less computing power resources from the NTN base station and can solve the computing power resource problem of the NTN base station.

[0108] Based on the above embodiments, the second division method specifically includes: Determine the PCI of all TN cells within the target spectral position, count the occurrences of each PCI, determine the maximum occurrence count, and the same number of initial clusters as the maximum occurrence count; The TN cells corresponding to the PCI with the highest occurrence frequency are assigned to each initial cluster as cluster centers, and the remaining PCIs are traversed in descending order of their occurrence frequency. For the current PCI that is traversed, based on the distance between each TN cell corresponding to the current PCI and the cluster center of each initial cluster, the initial cluster to which each TN cell corresponding to the current PCI belongs (excluding other TN cells corresponding to the current PCI) is determined, and each TN cell corresponding to the current PCI is allocated.

[0109] Specifically, such as Figure 7 As shown, the second division method may include the following steps: Determine the PCI of all TN cells within the target wavelength. The target wavelength can be each wavelength within the orbital coverage area of ​​the NTN base station, or it can be the wavelength to which a specified TN cell cluster belongs when combined with the first partitioning method.

[0110] Count the occurrences of each PCI to determine the maximum occurrence count and the number of initial clusters equal to the maximum occurrence count. Each initial cluster can be empty and needs to be continuously filled.

[0111] Traverse each PCI in descending order of its occurrence frequency. Determine if the current PCI is the one with the highest occurrence frequency. If so, assign each TN cell corresponding to the PCI with the highest occurrence frequency to an initial cluster, so that each initial cluster has one TN cell. Use the location information of the TN cell assigned to each initial cluster as the cluster center of the initial cluster, and use the coverage radius of the TN cell assigned to each initial cluster as the cluster radius of the initial cluster.

[0112] If the current PCI encountered is not the PCI with the maximum number of occurrences, then process each TN cell corresponding to the current PCI, assign each TN cell to the initial cluster that is closest to it and does not contain other TN cells corresponding to the current PCI, and update the cluster radius, that is, update the cluster shape.

[0113] The process checks whether all cells corresponding to the current PCI have been processed. If so, it checks whether all PCIs have been traversed. If traversal is complete, the process ends, ultimately forming a TN cell cluster and determining the TN cell cluster information. If traversal is not complete, it continues to traverse the next PCI.

[0114] In this embodiment of the application, the PCI in each TN cell cluster formed by the second partitioning method is unique, which can avoid PCI conflict.

[0115] Based on the above embodiments, the step of dividing the TN cells within the orbital coverage area into at least one TN cell cluster, using wave positions as the unit, includes: Based on the first division method, using wave positions as the unit, the TN cells within the orbital coverage area are divided into at least one TN cell cluster; The step of sending the TN cell cluster information to the NTN base station further includes: The system receives a designated TN cell cluster within a preset period sent by the NTN base station, divides each TN cell cluster under the wavelength of the designated TN cell cluster according to the second division method, obtains new TN cell cluster information, and sends the new TN cell cluster information to the NTN base station. The first division method is based on the geographical location of each wave position within the orbital coverage area; the second division method is based on the clustering of TN cells under each wave position within the orbital coverage area according to the PCI distribution; the designated TN cell cluster is the TN cell cluster with corresponding CGI information among the target TN cell clusters determined within the preset period.

[0116] Specifically, in the embodiments of this application, in the scheme combining the first and second partitioning methods, such as Figure 4 As shown, the first division method is used to divide the TN cells within the orbital coverage area into at least one TN cell cluster, with the wave position as the unit. The TN cell cluster information of each TN cell cluster is the initialized TN cell cluster information.

[0117] The initialized TN cell cluster information is sent to the NTN base station, which can then... Figure 3 The subsequent steps will be executed until the switch is complete.

[0118] After each preset period ends, the NTN base station sends the designated TN cell clusters within the preset period to the satellite-ground coordination unit. The satellite-ground coordination unit divides each TN cell cluster under the wavelength of the designated TN cell cluster using the second division method, obtains the new TN cell clusters and the new TN cell cluster information, and sends the new TN cell cluster information to the NTN base station.

[0119] The NTN base station updates the initialized TN cell cluster information based on the new TN cell cluster information to obtain the updated TN cell cluster information.

[0120] In the next preset period, the NTN base station applies the updated TN cell cluster information obtained in the previous preset period.

[0121] In this embodiment, the satellite-ground cooperative unit determines TN cell cluster information by combining the first and second partitioning methods, which can realize the function of dynamically adjusting cell clusters, reduce the probability of PCI conflict, reduce the probability of NTN base station issuing CGI measurements, and speed up the handover execution time. Compared with the second partitioning method, it can reduce the computing power requirement of NTN base station.

[0122] Based on the above embodiments, the shape of each TN cell within any wavelength position is a regular graphic. The step of determining the TN cells belonging to each cluster within any given wavelength position based on the location information of each cluster center and each TN cell within any given wavelength position includes: Based on the radius of the inscribed circle of the regular shape, calculate the first center distance in the horizontal direction and the second center distance in the vertical direction between two adjacent regular shapes; For any cluster center, based on the cluster center, the first center distance, and the second center distance, the regular pattern contained in the cluster to which the cluster center belongs is determined, and based on the location information of each TN cell, the TN cells contained in the cluster to which the cluster center belongs are determined.

[0123] Specifically, such as Figure 8 As shown, each TN cell cluster within each wavelength position is a regular shape, such as a circle. The shape of each TN cell within each wavelength position is also a regular shape, and the TN cells within each TN cell cluster are closely arranged. Here, the regular shape can be a regular hexagon or other shapes; no specific limitation is made here. The following explanation uses a regular hexagon as an example only.

[0124] When determining the TN cell belonging to each cluster within any given wavelength position, the first center-to-center distance in the horizontal direction and the second center-to-center distance in the vertical direction between two adjacent regular hexagons can be calculated using the radius of the inscribed circle of each hexagon. If the center position of the wavelength position is set as (… The radius of the wave position is set to R, and the radius of the inscribed circle of the regular hexagon is set to r.

[0125] First center distance for: .

[0126] Second center distance for: .

[0127] Therefore, the number of cell rows in each cluster can also be calculated. and number of columns in the community They are respectively: , .

[0128] For any cluster center, using the cluster center, the first center distance, and the second center distance, determine the regular hexagons contained in the cluster to which the cluster center belongs. Assume the center point of the first cluster is the center position of the wave position; the center points of other clusters can be generated by offsetting the hexagonal grid arrangement. First, generate the first cluster. In the horizontal direction, for odd-numbered rows, the center point of each regular hexagon is offset along the x-axis. The step size movement, for even rows, is such that the center point of each regular hexagon moves along the x-axis at a distance of... The step size moves, but the entire row has a step size relative to the previous row. The horizontal offset. Vertically, each row has a y-axis offset relative to the previous row. The offset. For each generated cluster center (x, y), it is necessary to check whether it is located within the wave position, i.e., satisfying the following condition: .

[0129] Subsequently, the location information of each TN cell can be combined, that is, the location information of each TN cell can be mapped to the regular hexagon in each cluster, to obtain the TN cells contained in the cluster to which any cluster center belongs.

[0130] In this embodiment of the application, a specific implementation method is provided to ensure the feasibility of the first partitioning method.

[0131] like Figure 9 As shown, based on the above embodiments, this application provides a terrestrial network neighbor cell information acquisition device, applied to an NTN base station, comprising: Information receiving module 91 is used to receive the location information of the NTN terminal; The information delivery module 92 is used to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located based on the location information and the TN cell cluster information at the wave position level within the orbit coverage area of ​​the NTN base station, and to send neighbor cell measurement information to the NTN terminal; the TN cell cluster information is predetermined and sent by the satellite-ground coordination unit; the neighbor cell measurement information is determined based on the frequency point of the target TN cell cluster; PCI lookup module 93 is used to receive the TN neighbor cell PCI reported by the NTN terminal after measurement based on the neighbor cell measurement information, and to look up the CGI corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster. The TN neighbor cell determination module 94 is used to determine the TN neighbor cell handover target of the NTN terminal based on the number of CGIs.

[0132] Specifically, the functions of each module in the terrestrial network neighbor cell information acquisition device provided in this application embodiment correspond one-to-one with the operation flow of each step in the above-mentioned method embodiment with NTN base station as the execution subject, and the achieved effect is also the same. For details, please refer to the above embodiments, and this application embodiment will not repeat them.

[0133] like Figure 10 As shown, based on the above embodiments, this application provides a terrestrial network neighbor cell information acquisition device, applied to a satellite-ground cooperative unit, comprising: The coverage area determination module 101 is used to determine that the NTN base station is connected to the gateway station, and to determine the orbital coverage area of ​​the NTN base station based on the ephemeris information of the NTN base station; The cell division module 102 is used to divide the TN cells within the orbital coverage area into at least one TN cell cluster based on wave position, and to determine the TN cell cluster information of the at least one TN cell cluster. The information sending module 103 is used to send the TN cell cluster information to the NTN base station.

[0134] Specifically, the functions of each module in the ground network neighbor cell information acquisition device provided in this application embodiment correspond one-to-one with the operation flow of each step in the above-mentioned method embodiment with the satellite-ground coordination unit as the execution subject, and the achieved effect is also the same. For details, please refer to the above embodiments, and this application embodiment will not repeat them.

[0135] like Figure 11 As shown, based on the above embodiments, this application provides a network system including: an NTN terminal 111, an NTN base station 112, and a satellite-ground coordination unit 113; The NTN base station 112 is communicatively connected to the NTN terminal 111 and the satellite-ground coordination unit 113, respectively. The NTN terminal 111 is used to send location information to the NTN base station 112; The NTN base station 112 is used to execute the terrestrial network neighbor cell information acquisition method provided in the above embodiments; The satellite-ground coordination unit 113 is used to execute the ground network neighbor cell information acquisition method provided in the above embodiments.

[0136] In this embodiment, the network system can use TN cell cluster information pre-determined and sent by the satellite-ground coordination unit to determine the frequency point and cell information of the target TN cell cluster where the NTN terminal is located. This not only ensures the accuracy of the TN neighbor cell handover target determined by the NTN base station, but also avoids the out-of-domain frequency point and cell information of a single TN base station, reducing the risk of leakage of TN base station location information and improving the network security of the NTN network. Moreover, in this method, the satellite-ground coordination unit does not directly participate in the real-time interaction between the NTN terminal and the NTN base station; it only needs to establish a communication connection with the NTN base station in advance. This reduces the signaling latency of the NTN terminal, increases the overall reliability of NTN network services, and improves the NTN user experience. In addition, this method only needs to filter out the frequency point and cell information of the target TN cell cluster from the TN cell cluster information, without processing all the frequency points and cell information of the TN base station. This also greatly reduces the computing power and storage requirements of the NTN base station, reducing the computational load of the NTN base station. Finally, this method combines the number of CGIs to determine the TN neighbor cell handover target of the NTN terminal, and considers the situation of cell PCI conflict, further improving the accuracy of the TN neighbor cell handover target.

[0137] Figure 12 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 12 As shown, the electronic device may include a processor 810, a communications interface 820, a memory 830, and a communication bus 840, wherein the processor 810, the communications interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 can call logical instructions in the memory 830 to execute the terrestrial network neighbor cell information acquisition method provided in the above embodiments.

[0138] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to related technologies, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0139] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the terrestrial network neighbor cell information acquisition method provided in the above embodiments.

[0140] In another aspect, this application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, is implemented to perform the terrestrial network neighbor cell information acquisition method provided in the above embodiments. This computer-readable storage medium can be either a non-transitory computer-readable storage medium or a transient computer-readable storage medium, and is not specifically limited here.

[0141] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0142] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for acquiring ground network cell information, characterized by, Applied to a non-terrestrial network (NTN) base station, comprising: receiving position information of an NTN terminal; based on the position information, applying the ground network (TN) cell cluster information of the wave position level within the orbital coverage range of the NTN base station, determining the frequency point and cell information of the target TN cell cluster where the NTN terminal is located, and issuing neighbor cell measurement information to the NTN terminal; the TN cell cluster information is determined and sent by a satellite-ground cooperative unit in advance; the neighbor cell measurement information is determined based on the frequency point of the target TN cell cluster; receiving the TN neighbor cell physical cell identifier (PCI) reported by the NTN terminal after measurement based on the neighbor cell measurement information, and searching for the cell global identifier (CGI) corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster; based on the number of CGIs, determining the TN neighbor cell handover target of the NTN terminal. 2.The ground network cell information acquisition method of claim 1, wherein, The TN cell cluster information is obtained based on a first division method or a second division method; wherein the first division method is based on equal division of the geographical position of each wave position within the orbital coverage range; the second division method is based on clustering of TN cells under each wave position according to PCI distribution. 3.The ground network cell information acquisition method of claim 1, wherein, The determination of the TN neighbor cell handover target of the NTN terminal based on the number of CGIs comprises: if the number of CGIs is 1, the cell identified by the CGI is determined as the TN neighbor cell handover target; if the number of CGIs is multiple, CGI measurement information is issued to the NTN terminal, and CGI information reported by the NTN terminal after CGI measurement based on the CGI measurement information is received, and the TN neighbor cell handover target is determined based on the CGI information.

4. The floor network cell information acquisition method according to claim 3, characterized by, The TN cell cluster information is initialized based on the first division method, and every preset period, new TN cell cluster information is used for updating, which is obtained by dividing each TN cell cluster under the specified TN cell cluster based on the second division method; The specified TN cell cluster is the TN cell cluster corresponding to the CGI information determined within the preset period; the first division method is based on equal division of the geographical position of each wave position within the orbital coverage range; the second division method is based on clustering of TN cells under each wave position according to PCI distribution.

5. The floor network cell information acquisition method according to any one of claims 1-4, characterized by, The receiving of the position information of the NTN terminal comprises: sending a position query request to the NTN terminal; the position query request is used to instruct the NTN terminal to report the position information; receiving the position information reported by the NTN terminal based on the position query request.

6. A method for acquiring ground network cell information, characterized by, Applied to a satellite-ground cooperative unit, comprising: determining that an NTN base station is connected to a gateway station, and determining the orbital coverage range of the NTN base station based on the ephemeris information of the NTN base station; dividing the TN cells within the orbital coverage range into at least one TN cell cluster in units of wave positions, and determining the TN cell cluster information of the at least one TN cell cluster; sending the TN cell cluster information to the NTN base station.

7. The floor network cell information acquisition method according to claim 6, characterized by, The TN cells in the orbit coverage range are divided into at least one TN cell cluster in units of wave positions, including: The TN cells in the orbit coverage range are divided into at least one TN cell cluster in units of wave positions based on the first division mode or the second division mode; The first division mode is based on equal division of the geographical position of each wave position in the orbit coverage range; and the second division mode is based on clustering of the TN cells under each wave position in the orbit coverage range according to the PCI distribution. 8.The ground network cell information acquisition method of claim 6, wherein, The TN cells in the orbit coverage range are divided into at least one TN cell cluster in units of wave positions, including: The TN cells in the orbit coverage range are divided into at least one TN cell cluster in units of wave positions based on the first division mode; The TN cell cluster information is further sent to the NTN base station, and then includes: Receiving the specified TN cell cluster in a preset period sent by the NTN base station, dividing each TN cell cluster under the wave position to which the specified TN cell cluster belongs based on the second division mode, obtaining new TN cell cluster information, and sending the new TN cell cluster information to the NTN base station; The first division mode is based on equal division of the geographical position of each wave position in the orbit coverage range; and the second division mode is based on clustering of the TN cells under each wave position in the orbit coverage range according to the PCI distribution; and the specified TN cell cluster is a TN cell cluster corresponding to the CGI information determined in the preset period.

9. The floor network cell information acquisition method according to claim 7 or 8, characterized by, The TN cells in the orbit coverage range are divided into at least one TN cell cluster in units of wave positions based on the first division mode, including: Obtaining a cluster spacing; For any wave position in the orbit coverage range, based on the coverage diameter of the any wave position and the cluster spacing, calculating the total number of clusters that can be placed in the any wave position; Based on the cluster spacing and the center position of the any wave position, generating cluster centers in the any wave position, and based on the cluster centers and the position information of the TN cells in the any wave position, determining the TN cells belonging to each cluster in the any wave position; The TN cells belonging to each cluster in the any wave position are allocated.

10. The floor network cell information acquisition method according to claim 9, wherein The shape of each TN cell in the any wave position is a regular polygon; Based on the cluster centers and the position information of the TN cells in the any wave position, determining the TN cells belonging to each cluster in the any wave position, including: Based on the inscribed circle radius of the regular polygon, calculating a first center distance in the horizontal direction and a second center distance in the vertical direction of two adjacent regular polygons; For any cluster center, based on the any cluster center, the first center distance and the second center distance, determining the regular polygons contained in the cluster to which the any cluster center belongs, and based on the position information of the TN cells, determining the TN cells contained in the cluster to which the any cluster center belongs.

11. The floor network cell information acquisition method according to claim 7 or 8, characterized by, The second division mode specifically includes: Determine the PCIs of all TN cells in the target wave position, count the number of occurrences of each PCI, determine the maximum number of occurrences and the same number of initial clusters as the maximum number of occurrences; Assign each TN cell corresponding to the PCI with the maximum number of occurrences to each initial cluster as a cluster center, and traverse the remaining PCIs in descending order of the number of occurrences of the PCIs; For the current PCI traversed, determine the initial cluster to which each TN cell corresponding to the current PCI belongs based on the distance between each TN cell corresponding to the current PCI and the cluster center of each initial cluster, and assign each TN cell corresponding to the current PCI.

12. A terrestrial network cell information acquisition apparatus characterized by comprising: Applied to an NTN base station, comprising: An information receiving module configured to receive position information of an NTN terminal; An information issuing module configured to determine frequency points and cell information of a target TN cell cluster in which the NTN terminal is located based on the position information, apply TN cell cluster information of a wave position level within an orbital coverage range of the NTN base station, and issue neighbor cell measurement information to the NTN terminal; the TN cell cluster information is determined and sent by a space-ground cooperative unit in advance; the neighbor cell measurement information is determined based on the frequency points of the target TN cell cluster; A PCI searching module configured to receive TN neighbor cell physical cell identifier (PCI) reported by the NTN terminal after measurement based on the neighbor cell measurement information, and search for a cell global identifier (CGI) corresponding to the TN neighbor cell PCI in the cell information of the target TN cell cluster; A TN neighbor cell determining module configured to determine a TN neighbor cell switching target of the NTN terminal based on the number of CGIs.

13. A terrestrial network cell information acquisition apparatus characterized by comprising: Applied to a space-ground cooperative unit, comprising: A coverage range determining module configured to determine that an NTN base station is connected to a gateway station, determine an orbital coverage range of the NTN base station based on ephemeris information of the NTN base station; A cell dividing module configured to divide TN cells within the orbital coverage range into at least one TN cell cluster in units of wave positions, and determine TN cell cluster information of the at least one TN cell cluster; An information sending module configured to send the TN cell cluster information to the NTN base station.

14. A network system characterized by comprising: Comprising: An NTN terminal, an NTN base station, and a space-ground cooperative unit; The NTN base station is communicatively connected to the NTN terminal and the space-ground cooperative unit; The NTN terminal is configured to send position information to the NTN base station; The NTN base station is configured to perform the ground network neighbor cell information acquisition method according to any one of claims 1-5; The space-ground cooperative unit is configured to perform the ground network neighbor cell information acquisition method according to any one of claims 6-11.

15. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the ground network neighbor cell information acquisition method according to any one of claims 1-11.

16. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the ground network neighbor cell information acquisition method according to any one of claims 1-11.

17. A computer program product comprising a computer program, characterized in that, The computer program, when executed by the processor, implements the ground network cell information acquisition method according to any one of claims 1-11.

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