Mobility management method, base station, terminal, storage medium, and computer program product
By configuring the priority relationship of different types of beams for the terminal and performing mobility management, the problem of inconsistent beam coverage in asymmetric coverage scenarios in satellite systems is solved, reducing the number of handovers and improving signal quality and mobility performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA MOBILE COMM LTD RES INST
- Filing Date
- 2024-12-23
- Publication Date
- 2026-06-23
AI Technical Summary
In satellite systems, due to the inconsistent coverage range of different beams in the same cell under asymmetric coverage scenarios, the mobility performance of terminals varies greatly on different beams, especially the number of beam switching and signal quality issues when covering low-altitude and ground areas.
By differentiating information such as user type, service model, and user location, priority relationships of different types of beams are configured for the terminal, and mobility management is performed based on priority relationships and beam measurement results to improve the mobility performance of the terminal.
It reduces the number of terminal handovers and improves coverage performance, especially during beam switching in low-altitude and ground areas, improving signal quality and terminal mobility.
Smart Images
Figure CN122269378A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of wireless communication technology, and in particular to a mobility management method, base station, terminal, storage medium, and computer program product. Background Technology
[0002] In satellite systems, different beams are assigned different priorities based on their importance or applicable scenarios. This prioritization mechanism helps the system manage and use resources more effectively, ensuring that critical missions or high-priority communications are given priority.
[0003] Existing beam priority definitions typically define the priority of terminal-scheduled beams, which mainly selects different beams to schedule data for users based on the performance and load of the beam corresponding to the terminal's location.
[0004] See Figure 1 The low-altitude coverage scenario shown exhibits asymmetric coverage networking. Air-to-ground base stations can form beams for low-altitude coverage and beams for ground coverage, while ground base stations can form beams for ground coverage. In this networking scenario, the coverage range of beams within the same cell varies significantly, resulting in substantial differences in coverage and interference. Existing protocols enhance measurements for different beams covering different altitudes, but this primarily addresses scenarios where the coverage range is generally consistent, rather than scenarios with significant asymmetric coverage differences. The biggest problem in this asymmetric scenario is the inconsistent coverage range of different beams within the same cell, leading to significant differences in terminal mobility performance across different beams. For example, the first type of beam used for low-altitude coverage has a much lower number of handovers at low altitudes compared to the second type of beam used for ground coverage. The second type of beam uses sidelobe coverage at low altitudes, resulting in rapid changes in the Signal-to-Interference-plus-Noise Ratio (SINR) and Reference Signal Receiving Power (RSRP), leading to poor performance. Summary of the Invention
[0005] This application provides a mobility management method, base station, terminal, storage medium, and computer program product. It distinguishes user type, service model, user location, and other information to configure different types of beam priority relationships for the terminal. Based on the priority relationship and beam measurement results, it performs mobility management on the terminal, improving the terminal's mobility performance, reducing the number of handovers, and improving coverage performance.
[0006] The technical solution of this application embodiment is implemented as follows:
[0007] This application provides a mobility management method applied to a base station, the method comprising:
[0008] Based on the terminal's first information, a priority relationship between a first type of beam and a second type of beam is determined for the terminal; the first information includes user type, service type, and at least one of the coverage area, wherein the first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas.
[0009] Based on the priority relationship and the beam measurement results reported by the terminal, mobility management is performed on the terminal.
[0010] In the above method, determining the priority relationship between the first type of beam and the second type of beam for the terminal based on the terminal's first information includes:
[0011] If the first information indicates that the terminal is located in a low-altitude region, the priority relationship is determined to be that the priority of the first type of beam is higher than that of the second type of beam;
[0012] If the first information indicates that the terminal is located in a ground area, the priority relationship is determined to be that the second type of beam has a higher priority than the first type of beam.
[0013] In the above method, the beam measurement results include: the measurement results of the synchronization signal block (SSB) on each type of beam in each of the first, second, and third cells;
[0014] The first cell is the cell where the terminal is located;
[0015] The second cell is a neighboring cell configured with the first type of beam and the second type of beam;
[0016] The third cell is a neighboring cell configured with the second type of beam;
[0017] Measurements for each SSB include: Reference Signal Received Power (RSRP) and / or Signal-to-Interference-plus-Noise Ratio (SINR).
[0018] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0019] If the priority relationship is such that the first type of beam has a higher priority than the second type of beam, and the following condition is met, the terminal is controlled to switch to the first type of beam of the second cell:
[0020] The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is less than or equal to a first threshold.
[0021] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0022] When the priority relationship is such that the first type of beam has a higher priority than the second type of beam, the terminal is prohibited from switching beams if the following condition is met:
[0023] The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than a first threshold.
[0024] The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to the second threshold.
[0025] The difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is greater than a third threshold, or is less than or equal to the third threshold and greater than a fourth threshold.
[0026] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0027] If the priority relationship is such that the first type of beam has a higher priority than the second type of beam, and the following condition is met, the terminal beam is controlled to switch to the second type of beam of the third cell:
[0028] The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than a first threshold.
[0029] The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to a second threshold.
[0030] The difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to the fourth threshold and greater than the fifth threshold.
[0031] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0032] If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, the terminal is controlled to switch to the second type of beam of the third cell if the following condition is met:
[0033] The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to the sixth threshold.
[0034] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0035] If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, and the following condition is met, the terminal is controlled to switch to the first type of beam in the second cell:
[0036] The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is greater than the sixth threshold.
[0037] The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is less than or equal to the seventh threshold.
[0038] In the above method, the step of performing mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal includes:
[0039] If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, then the terminal is prohibited from switching beams if the following conditions are met:
[0040] The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is greater than the sixth threshold.
[0041] The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than the seventh threshold.
[0042] The above method also includes:
[0043] A measurement control message is sent to the terminal so that the terminal can make a beam switching decision and trigger the reporting of the beam measurement results;
[0044] The measurement control message includes beam priority information and a switching event based on the beam priority configuration.
[0045] In the above method, the beam priority information includes:
[0046] If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam;
[0047] If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
[0048] In the above method, the switching event includes: a first event and a second event;
[0049] The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same;
[0050] The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
[0051] This application provides a mobility management method applied to a terminal, the method comprising:
[0052] The beam measurement results are reported to the base station so that the base station can perform mobility management on the terminal based on the priority relationship between the first type of beam and the second type of beam determined for the terminal and the beam measurement results;
[0053] The first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas.
[0054] The above method also includes:
[0055] The system receives measurement control messages sent by the base station; wherein the measurement control messages include beam priority information and handover events based on beam priority configuration.
[0056] Based on the measurement control message, a beam switching determination is made, and if a beam switching is determined, the beam measurement result is reported to the base station.
[0057] In the above method, the beam priority information includes:
[0058] If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam;
[0059] If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
[0060] In the above method, the switching event includes: a first event and a second event;
[0061] The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same;
[0062] The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
[0063] This application provides a base station, including: a first processor, a first memory, and a first communication bus;
[0064] The first communication bus is used to establish a communication connection between the first processor and the first memory;
[0065] The first processor is configured to execute one or more computer programs stored in the first memory to implement a mobility management method applied to a base station.
[0066] This application provides a terminal, including: a second processor, a second memory, and a second communication bus;
[0067] The second communication bus is used to establish a communication connection between the second processor and the second memory;
[0068] The second processor is configured to execute one or more computer programs stored in the second memory to implement a mobility management method applied to the terminal.
[0069] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements steps in a mobility management method applied to a base station, or steps in a mobility management method applied to a terminal.
[0070] This application provides a computer program product, including a computer program that, when executed, implements steps in a mobility management method applied to a base station, or steps in a mobility management method applied to a terminal.
[0071] This application provides a mobility management method, a base station, a terminal, a storage medium, and a computer program product. The method applied to a base station includes: determining a priority relationship between a first type of beam and a second type of beam for the terminal based on first information of the terminal; the first information includes user type, service type, and at least one of the following: the first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas; and performing mobility management on the terminal based on the priority relationship and beam measurement results reported by the terminal. The technical solution provided by this application distinguishes user type, service model, user location, and other information to configure different types of beam priority relationships for the terminal. Based on the priority relationship and beam measurement results, it performs mobility management on the terminal, improving the terminal's mobility performance, reducing handover frequency, and improving coverage performance. Attached Figure Description
[0072] Figure 1 This is a schematic diagram of an exemplary network structure in the prior art;
[0073] Figure 2 A flowchart illustrating a mobility management method provided in this application embodiment. Figure 1 ;
[0074] Figure 3 A flowchart illustrating a mobility management method provided in this application embodiment. Figure 2 ;
[0075] Figure 4 A schematic diagram of a base station structure provided in an embodiment of this application. Figure 1 ;
[0076] Figure 5 A schematic diagram of a base station structure provided in an embodiment of this application. Figure 2 ;
[0077] Figure 6 A schematic diagram of the structure of a terminal provided in this application embodiment. Figure 1 ;
[0078] Figure 7 A schematic diagram of the structure of a terminal provided in this application embodiment. Figure 2 . Detailed Implementation
[0079] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0080] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below through embodiments and in conjunction with the accompanying drawings. The embodiments below can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.
[0081] Furthermore, the technical solutions described in the embodiments of this application can be combined arbitrarily without conflict.
[0082] This application provides a mobility management method implemented through a base station and a terminal.
[0083] The mobility management method provided in this application is applicable to... Figure 1 In the network scenario shown, the coverage range of beams within the same cell varies significantly, resulting in substantial differences in coverage and interference. In this asymmetric scenario, the coverage range of different types of beams within the same cell is inconsistent, leading to significant differences in terminal mobility performance across different beams. Specifically, the first type of beam is used to cover low-altitude areas, while the second type is used to cover ground areas.
[0084] Figure 2 A flowchart illustrating a mobility management method provided in this application embodiment. Figure 1 .like Figure 2 As shown in the embodiments of this application, the mobility management method applied to a base station mainly includes the following steps:
[0085] S101. Based on the terminal's first information, determine the priority relationship between the first type of beam and the second type of beam for the terminal; the first information includes user type, service type, and at least one of the coverage area, the first type of beam is used to cover the low-altitude area, and the second type of beam is used to cover the ground area.
[0086] In the embodiments of this application, the base station determines the priority relationship between the first type of beam and the second type of beam for the terminal based on the terminal's first information.
[0087] In embodiments of this application, the base station can determine the priority relationship between two types of beams for the terminal based on the terminal's first information, including: if the first information indicates that the terminal is located in a low-altitude area, the priority relationship is determined to be that the first type of beam has a higher priority than the second type of beam; if the first information indicates that the terminal is located in a ground area, the priority relationship is determined to be that the second type of beam has a higher priority than the first type of beam.
[0088] It should be noted that, in the embodiments of this application, the first information may include user type, service type, and at least one of the coverage area. For example, the first information includes user type. If the user type is a low-altitude user, the priority relationship is that the first type of beam has a higher priority than the second type of beam. If the user type is a ground user, the priority relationship is that the second type of beam has a higher priority than the first type of beam. The specific first information can be selected based on actual needs and application scenarios, and this application embodiment does not limit it.
[0089] It should be noted that in the embodiments of this application, the priority relationship between the two types of beams determined by the base station for the terminal is not known to the terminal, but only to the base station. The base station can use this priority relationship to perform mobility management of the terminal, as detailed in step S102.
[0090] S102. Based on priority relationships and beam measurement results reported by the terminal, perform mobility management on the terminal.
[0091] In the embodiments of this application, as described in step S101 above, the base station can determine the priority relationship between the two types of beams for the terminal. In addition, the base station can also receive the beam measurement results reported by the terminal, and thus perform mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal.
[0092] In the embodiments of this application, the beam measurement results include: the measurement results of the synchronization signal / PBCH block (SSB) on each type of beam in each of the first cell, the second cell, and the third cell;
[0093] The first cell is the cell where the terminal is located;
[0094] The second cell is a neighboring cell configured with both type 1 and type 2 beams;
[0095] The third cell is a neighboring cell configured with the second type of beam;
[0096] The measurement results for each SSB include: RSRP and / or SINR.
[0097] It should be noted that, in the embodiments of this application, the base station itself can be configured with two SSBs at the same frequency but different time domains. One of the two SSBs is carried on a first type beam and the other is carried on a second type beam. The base station can send co-frequency measurement information to the terminal. The terminal co-frequency measurement reports the measurement results of the SSBs on each type beam of its cell and neighboring cells, that is, the beam measurement results.
[0098] It should be noted that, in the embodiments of this application, for the neighboring cells of the first cell where the terminal is located, there may be a second cell that is configured with both the first type of beam and the second type of beam, which is also known as a low-altitude neighboring cell. Alternatively, there may be a third cell that is configured with only the second type of beam, which is also known as a ground neighboring cell. The specific second cell and third cell are not limited in the embodiments of this application. The beam types configured in different cells may be the same, but the specific beam attributes, such as beam direction and the SSB carried by the beam, may be different.
[0099] In the embodiments of this application, the base station performs mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal. There are two cases: the first case is that the terminal is located in a low-altitude area, and the priority relationship is that the first type of beam has a higher priority than the second type of beam; the second case is that the terminal is located in a ground area, and the priority relationship is that the second type of beam has a higher priority than the first type of beam.
[0100] It should be noted that, in the embodiments of this application, for the sake of simplification, SSB1 in the following text represents the SSB on the first type of beam, and SSB2 represents the SSB on the second type of beam.
[0101] The following explanation focuses on the terminal mobility management method in the first scenario.
[0102] In the embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal, including: when the priority relationship is that the priority of the first type beam is higher than that of the second type beam, if the following condition is met, the base station controls the terminal to switch to the first type beam of the second cell: the difference between the measurement result of the SSB on the first type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is less than or equal to a first threshold.
[0103] It should be noted that, in the embodiments of this application, if the terminal is located in a low-altitude area, the priority relationship is that the priority of the first type beam is higher than that of the second type beam. Considering that the second cell is configured with a first type beam for covering the low-altitude area, the base station can prioritize analyzing the beam difference between the first type beam of the first cell and the second type beam of the second cell, and compare the measurement results of SSB on the first type beam of the first cell and the second cell. Specifically, if the RSRP of SSB1 of the first cell - the RSRP of SSB1 of the second cell ≤ the first threshold, the terminal can switch to the first type beam of the second cell, without considering the second type beam of the second cell and the third cell which is only configured with the second type beam.
[0104] It should be noted that, in the embodiments of this application, the value of the first threshold can be set according to actual needs and application scenarios, and the embodiments of this application do not impose any limitations.
[0105] In embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal. This may further include: when the priority relationship is that the first type of beam has a higher priority than the second type of beam, the terminal is prohibited from switching beams if the following conditions are met: the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the first type of beam in the second cell is greater than a first threshold; the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is less than or equal to a second threshold; the difference between the measurement result of the SSB on the second type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is greater than a third threshold, or less than or equal to the third threshold and greater than a fourth threshold.
[0106] It should be noted that, in the embodiments of this application, if the terminal is located in a low-altitude area, the priority relationship is that the priority of the first type of beam is higher than that of the second type of beam. Specifically, if the RSRP of SSB1 of the first cell minus the RSRP of SSB1 of the second cell is greater than the first threshold, and the RSRP of SSB1 of the first cell minus the RSRP of SSB2 of the third cell is less than the second threshold, and the RSRP of SSB2 of the first cell minus the RSRP of SSB2 of the third cell is greater than the third threshold, it means that the low-altitude local coverage is not as strong as the ground neighboring cell coverage. However, the second type of beam of the first cell is stronger than the second type of beam of the third cell. Therefore, the terminal can remain camped on the first type of beam of the first cell without switching beams.
[0107] It should be noted that, in the embodiments of this application, as described above, if the terminal is located in a low-altitude area, the priority relationship is that the priority of the first type beam is higher than that of the second type beam. Specifically, if the RSRP of SSB1 of the first cell - the RSRP of SSB1 of the second cell > the first threshold, and the RSRP of SSB1 of the first cell - the RSRP of SSB2 of the third cell ≤ the second threshold, and the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell ≤ the third threshold, it means that the coverage of the low-altitude local area is not as strong as the coverage of the ground neighboring cells, and the second type beam of the first cell is not as strong as the second type beam of the third cell. However, if the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell > the fourth threshold, it means that the third cell may be in a situation where there is too much interference from neighboring cells in the sidelobe coverage, and the ping-pong handover problem increases. In this case, the terminal can remain camped on the first type beam of the first cell and does not need to switch beams.
[0108] It should be noted that, in the embodiments of this application, the values of the second threshold, the third threshold and the fourth threshold can be set according to actual needs and application scenarios, and are not limited in the embodiments of this application.
[0109] In embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal. This may further include: when the priority relationship is that the first type of beam has a higher priority than the second type of beam, if the following conditions are met, controlling the terminal beam to switch to the second type of beam in the third cell: the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the first type of beam in the second cell is greater than a first threshold; the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is less than or equal to a second threshold; the difference between the measurement result of the SSB on the second type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is less than or equal to a fourth threshold and greater than a fifth threshold.
[0110] It should be noted that, in the embodiments of this application, if the terminal is located in a low-altitude area, the priority relationship is that the priority of the first type beam is higher than that of the second type beam. As mentioned above, specifically, if the RSRP of SSB1 of the first cell - the RSRP of SSB1 of the second cell > the first threshold, and the RSRP of SSB1 of the first cell - the RSRP of SSB2 of the third cell ≤ the second threshold, and the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell ≤ the fourth threshold, and of course, it is also less than the third threshold, and if the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell > the fifth threshold, it means that the third cell has good coverage for a period of time, such as during takeoff, and the terminal switches to the second type beam of the third cell.
[0111] It should be noted that, in the embodiments of this application, the value of the fifth threshold can be set according to actual needs and application scenarios, and the embodiments of this application do not impose any limitations.
[0112] The following explains the terminal mobility management method in the second scenario.
[0113] In the embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal, including: when the priority relationship is that the priority of the second type beam is higher than that of the first type beam, if the following condition is met, the base station controls the terminal to switch to the second type beam of the third cell: the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to the sixth threshold.
[0114] It should be noted that, in the embodiments of this application, if the terminal is located in the ground area, the priority relationship is that the priority of the second type beam is higher than that of the first type beam. The base station can prioritize analyzing the beam difference of the second type beams of the first cell and the third cell, and compare the measurement results of SSB on the second type beams of the first cell and the third cell. Specifically, if the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell ≤ the sixth threshold, the terminal can switch to the second type beam of the third cell without considering the second cell.
[0115] It should be noted that, in the embodiments of this application, the value of the sixth threshold can be set according to actual needs and application scenarios, and the embodiments of this application do not impose any limitations.
[0116] In embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal. This may further include: when the priority relationship is that the second type of beam has a higher priority than the first type of beam, if the following conditions are met, the terminal is controlled to switch to the first type of beam in the second cell: the difference between the measurement result of the SSB on the second type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is greater than a sixth threshold; the difference between the measurement result of the SSB on the second type of beam in the first cell and the measurement result of the SSB on the first type of beam in the second cell is less than or equal to a seventh threshold.
[0117] It should be noted that, in the embodiments of this application, if the terminal is located in the ground area, the priority relationship is that the priority of the second type beam is higher than that of the first type beam. Specifically, if the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell > the sixth threshold, and the RSRP of SSB2 of the first cell - the RSRP of SSB1 of the second cell ≤ the seventh threshold, it means that the ground coverage of this area is not as strong as the low-altitude neighboring cell coverage. In order to ensure that the terminal stays in the ground cell as much as possible, the seventh threshold can be set lower, and the terminal can switch to the first type beam of the second cell if the condition is met.
[0118] It should be noted that, in the embodiments of this application, the value of the seventh threshold can be set according to actual needs and application scenarios, and the embodiments of this application do not impose any limitations.
[0119] In the embodiments of this application, the base station performs mobility management on the terminal based on priority relationships and beam measurement results reported by the terminal, including: when the priority relationship is that the priority of the second type beam is higher than that of the first type beam, the terminal is prohibited from switching beams if the following conditions are met: the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is greater than a sixth threshold; the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is greater than a seventh threshold.
[0120] It should be noted that, in the embodiments of this application, if the terminal is located in the ground area, the priority relationship is that the priority of the second type beam is higher than that of the first type beam. Specifically, if the RSRP of SSB2 of the first cell - the RSRP of SSB2 of the third cell > the sixth threshold, and the RSRP of SSB2 of the first cell - the RSRP of SSB1 of the second cell > the seventh threshold, the terminal can remain camped on the second type beam of the first cell without switching beams.
[0121] In the embodiments of this application, by executing step S102, that is, based on the priority relationship and the beam measurement results reported by the terminal, the mobility management of the terminal can be performed, which can ensure that the terminal located in the low-altitude area prioritizes camping on the first type beam and switching between the first type beams, and the terminal located in the ground area prioritizes camping on the second type beam and switching between the second type beams. For example, a 3dB difference between the first type beams is sufficient for switching, and a 6-10dB difference between the first type beams and the second type beams is required for switching. Here, the interference of about 5dB larger second type beams is taken into account. A 3dB difference between the second type beams can also be used for switching when the first type beam does not meet the threshold. At this time, cell type does not need to be distinguished.
[0122] It should be noted that existing terminals initiate uplink synchronization on the Physical Random Access Channel (PRACH) resource corresponding to their strongest measured SSB. In this case, the SSB measured by the terminal and the SSB provided to the terminal by the base station will be misaligned. Therefore, the system and terminal need to be enhanced so that the system periodically uses downlink control information. ， The DCI and Medium Access Control (MAC) control elements (CE) inform the terminal of its Quasi Co-Location (QCL) relationship, and the terminal selects the resource corresponding to the SSB associated with the QCL for accessing resources.
[0123] In the embodiments of this application, the base station can also interact with the terminal with mobility management information based on beam priority, which will be described in detail below.
[0124] In the embodiments of this application, the base station may further perform the following steps: sending a measurement control message to the terminal for the terminal to make a beam switching judgment and triggering the reporting of beam measurement results; wherein, the measurement control message includes beam priority information and a switching event based on beam priority configuration.
[0125] It should be noted that, in the embodiments of this application, the base station adds beam priority information to the measurement control message when sending the measurement control message. The beam priority information includes: if the terminal is located in a low-altitude area, the priority of the first type of beam is higher than that of the second type of beam; if the terminal is located in a ground area, the priority of the second type of beam is higher than that of the first type of beam. For example, for a terminal located in a low-altitude area, the priority of SSB1 based on the 700MHz frequency point is higher than that of SSB2, or for a terminal located in a ground area, the priority of SSB2 based on the 700MHz frequency point is higher than that of SSB1.
[0126] It should be noted that, in the embodiments of this application, the base station can configure A3 events based on beam priority, i.e., handover events configured based on beam priority. The handover events include: a first event and a second event; the first event is used to determine whether to trigger beam handover when the measured beam priorities are the same; the second event is used to determine whether to trigger beam handover when the measured beam priorities are different. For example, the handover events configured by the base station to the terminal include A3 event 1 and A3 event 2. Based on this, when beams have the same priority, the terminal performs measurement and control according to the existing A3 event 1 (first event); if the measured beams are at different priorities, measurement and control are performed according to A3 event 2 (second event); the thresholds for events 1 and 2 are different, and A3 event 2, combined with existing multi-cell reporting rules, enables the terminal to report beam and cell handover requests at different priorities. It should be noted that, in the embodiments of this application, the base station sends measurement control messages to the terminal, and the terminal can use these messages to determine beam handover, thereby reporting beam measurement results to the base station when beam handover is required, improving the flexibility of the terminal in reporting beam measurement results. Upon receiving the beam measurement results reported by the terminal, the base station can execute the above step S102 to perform mobility management of the terminal based on the priority relationship determined for the terminal and the received beam measurement results.
[0127] Figure 3 A flowchart illustrating a mobility management method provided in this application embodiment. Figure 2 .like Figure 3 As shown in the embodiments of this application, the mobility management method applied to the terminal mainly includes the following steps:
[0128] S201. Report the beam measurement results to the base station so that the base station can perform mobility management on the terminal based on the priority relationship between the first type of beam and the second type of beam determined for the terminal and the beam measurement results; wherein, the first type of beam is used to cover the low-altitude area and the second type of beam is used to cover the ground area.
[0129] In the embodiments of this application, corresponding to the base station-side method described above, the terminal can report beam measurement results to the base station so that the base station can perform mobility management on the terminal based on the priority relationship between the first type of beam and the second type of beam determined for the terminal and the beam measurement results.
[0130] It should be noted that, in the embodiments of this application, the explanations of the first type of beam and the second type of beam can be found in the relevant content on the base station side, and will not be repeated here.
[0131] In the embodiments of this application, the terminal reports beam measurement results to the base station, including: receiving a measurement control message sent by the base station; wherein the measurement control message includes beam priority information and a handover event configured based on the beam priority; determining beam handover based on the measurement control message, and reporting the beam measurement results to the base station if beam handover is determined.
[0132] In the embodiments of this application, the beam priority information includes: if the terminal is located in a low-altitude area, the priority of the first type of beam is higher than that of the second type of beam; if the terminal is located in a ground area, the priority of the second type of beam is higher than that of the first type of beam.
[0133] In embodiments of this application, the switching event includes: a first event and a second event; the first event is used to determine whether to trigger beam switching when the measured beam priorities are the same; the second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
[0134] It should be noted that, in the embodiments of this application, corresponding to the base station side method described above, the terminal can receive the measurement control message sent by the base station, make a judgment based on the beam priority information carried in the measurement control message and the handover event based on the beam priority configuration, and trigger the reporting of the beam measurement results.
[0135] For example, when a terminal is located in a low-altitude area, based on beam priority information, the terminal can know that the priority of the first type of beam is higher than that of the second type of beam. The terminal measures beam 1 of the current cell and beam 2 of a certain neighboring cell, where beam 1 is the first type of beam and beam 2 is the second type of beam. The two beams have different priorities. Based on this, the terminal determines whether the measurement results of beam 1 and beam 2 satisfy the second event. If they do, the terminal reports the beam measurement results to the base station.
[0136] Based on the aforementioned mobility management methods for base stations and terminals, the technical solution provided in this application distinguishes user type, service model, user location, and other information to configure different types of beam priorities for terminals. Different terminal types, service models, or coverage areas are prioritized and maintained on different types of beams. This improves terminal mobility performance, reduces handover frequency, and enhances coverage performance.
[0137] This application provides a base station. Figure 4 A schematic diagram of a base station structure provided in an embodiment of this application. Figure 1 .like Figure 4 As shown in the embodiments of this application, base station 1 includes:
[0138] The determining module 11 determines the priority relationship between a first type of beam and a second type of beam for the terminal based on the terminal's first information; the first information includes user type, service type, and at least one of the coverage area, wherein the first type of beam is used to cover low-altitude areas and the second type of beam is used to cover ground areas.
[0139] The management module 12 is used to perform mobility management on the terminal based on the priority relationship and the beam measurement results reported by the terminal.
[0140] In one embodiment of this application, the determining module 11 is configured to determine the priority relationship as follows: if the first information indicates that the terminal is located in a low-altitude area, the priority relationship is that the first type of beam has a higher priority than the second type of beam; if the first information indicates that the terminal is located in a ground area, the priority relationship is that the second type of beam has a higher priority than the first type of beam.
[0141] In one embodiment of this application, the beam measurement results include: the measurement results of the synchronization signal block (SSB) on each type of beam in each of the first, second, and third cells;
[0142] The first cell is the cell where the terminal is located;
[0143] The second cell is a neighboring cell configured with the first type of beam and the second type of beam;
[0144] The third cell is a neighboring cell configured with the second type of beam;
[0145] Measurements for each SSB include: Reference Signal Received Power (RSRP) and / or Signal-to-Interference-plus-Noise Ratio (SINR).
[0146] In one embodiment of this application, the management module 12 is configured to control the terminal to switch to the first type beam of the second cell if the following condition is met when the priority relationship is that the first type beam has a higher priority than the second type beam: the difference between the measurement result of the SSB on the first type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is less than or equal to a first threshold.
[0147] In one embodiment of this application, the management module 12 is configured to prohibit the terminal from switching beams when the priority relationship is that the first type of beam has a higher priority than the second type of beam, if the following conditions are met: the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the first type of beam in the second cell is greater than a first threshold; the difference between the measurement result of the SSB on the first type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is less than or equal to a second threshold; the difference between the measurement result of the SSB on the second type of beam in the first cell and the measurement result of the SSB on the second type of beam in the third cell is greater than a third threshold, or less than or equal to the third threshold and greater than a fourth threshold.
[0148] In one embodiment of this application, the management module 12 is configured to control the terminal beam to switch to the second type beam of the third cell if the following conditions are met when the priority relationship is that the first type beam has a higher priority than the second type beam: the difference between the measurement result of the SSB on the first type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is greater than a first threshold; the difference between the measurement result of the SSB on the first type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to a second threshold; and the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to a fourth threshold and greater than a fifth threshold.
[0149] In one embodiment of this application, the management module 12 is configured to control the terminal to switch to the second type beam of the third cell if the following condition is met when the priority relationship is that the second type beam has a higher priority than the first type beam: the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to a sixth threshold.
[0150] In one embodiment of this application, the management module 12 is configured to control the terminal to switch to the first type of beam in the second cell if the priority relationship is that the second type of beam has a higher priority than the first type of beam, and the following conditions are met:
[0151] The difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is greater than the sixth threshold; the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is less than or equal to the seventh threshold.
[0152] In one embodiment of this application, the management module 12 is configured to prohibit the terminal from switching beams if the following conditions are met when the priority relationship is that the second type beam has a higher priority than the first type beam: the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is greater than a sixth threshold; the difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the first type beam of the second cell is greater than a seventh threshold.
[0153] In one embodiment of this application, base station 1 further includes a communication module (not shown in the figure) for sending a measurement control message to the terminal so that the terminal can make a beam switching judgment and trigger the reporting of the beam measurement results; wherein, the measurement control message includes beam priority information and a switching event configured based on beam priority.
[0154] In one embodiment of this application, the beam priority information includes:
[0155] If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam;
[0156] If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
[0157] In one embodiment of this application, the switching event includes: a first event and a second event;
[0158] The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same;
[0159] The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
[0160] Based on the same inventive concept Figure 5A schematic diagram of a base station structure provided in an embodiment of this application. Figure 2 .like Figure 5 As shown, base station 1 includes: a first processor 13, a first memory 14, and a first communication bus 15;
[0161] The first communication bus 15 is used to realize the communication connection between the first processor 13 and the first memory 14;
[0162] The first processor 13 is configured to execute one or more computer programs stored in the first memory 14 to implement a mobility management method applied to a base station.
[0163] This application provides a terminal. Figure 6 A schematic diagram of the structure of a terminal provided in this application embodiment. Figure 1 .like Figure 6 As shown, in an embodiment of this application, terminal 2 includes:
[0164] The reporting module 21 is used to report beam measurement results to the base station so that the base station can perform mobility management on the terminal based on the priority relationship between the first type of beam and the second type of beam determined for the terminal and the beam measurement results.
[0165] The first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas.
[0166] In one embodiment of this application, terminal 2 further includes a receiving module (not shown in the figure) for receiving measurement control messages sent by the base station; wherein the measurement control messages include beam priority information and a handover event based on beam priority configuration;
[0167] The reporting module 21 is used to determine beam switching based on the measurement control message, and to report the beam measurement results to the base station if beam switching is determined.
[0168] In one embodiment of this application, the beam priority information includes:
[0169] If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam;
[0170] If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
[0171] In one embodiment of this application, the switching event includes: a first event and a second event;
[0172] The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same;
[0173] The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
[0174] Based on the same inventive concept Figure 7 A schematic diagram of the structure of a terminal provided in this application embodiment. Figure 2 .like Figure 7 As shown, terminal 2 includes: a second processor 22, a second memory 23, and a second communication bus 24;
[0175] The second communication bus 24 is used to realize the communication connection between the second processor 22 and the second memory 23;
[0176] The second processor 22 is used to execute one or more computer programs stored in the second memory 23 to implement a mobility management method applied to the terminal.
[0177] This application provides a computer program product, including a computer program that, when executed, implements steps in a mobility management method applied to a base station, or steps in a mobility management method applied to a terminal.
[0178] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements steps in a mobility management method applied to a base station, or steps in a mobility management method applied to a terminal.
[0179] Computer-readable storage media can be volatile memory, such as random-access memory (RAM); or non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); or devices that include one or any combination of the above-mentioned memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.
[0180] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of hardware embodiments, software embodiments, or embodiments combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.
[0181] This application is described with reference to schematic and / or block diagrams of implementations of methods, apparatus (systems), and computer program products according to embodiments of this application. It should be understood that each block of the schematic and / or block diagrams can be implemented by computer program instructions, and combinations of blocks in the schematic and / or block diagrams can be implemented. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the schematic and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.
[0182] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in the implementation flow diagram. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.
[0183] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.
[0184] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A mobility management method, characterized in that, Applied to a base station, the method includes: Based on the terminal's first information, a priority relationship between a first type of beam and a second type of beam is determined for the terminal; the first information includes user type, service type, and at least one of the coverage area, wherein the first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas. Based on the priority relationship and the beam measurement results reported by the terminal, mobility management is performed on the terminal.
2. The method according to claim 1, characterized in that, The method of determining the priority relationship between the first type of beam and the second type of beam for the terminal based on the first information of the terminal includes: If the first information indicates that the terminal is located in a low-altitude region, the priority relationship is determined to be that the priority of the first type of beam is higher than that of the second type of beam; If the first information indicates that the terminal is located in a ground area, the priority relationship is determined to be that the second type of beam has a higher priority than the first type of beam.
3. The method according to claim 1, characterized in that, The beam measurement results include: the measurement results of the synchronization signal block (SSB) on each type of beam in each of the first, second, and third cells; The first cell is the cell where the terminal is located; The second cell is a neighboring cell configured with the first type of beam and the second type of beam; The third cell is a neighboring cell configured with the second type of beam; Measurements for each SSB include: Reference Signal Received Power (RSRP) and / or Signal-to-Interference-plus-Noise Ratio (SINR).
4. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: If the priority relationship is such that the first type of beam has a higher priority than the second type of beam, and the following condition is met, the terminal is controlled to switch to the first type of beam of the second cell: The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is less than or equal to a first threshold.
5. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: When the priority relationship is such that the first type of beam has a higher priority than the second type of beam, the terminal is prohibited from switching beams if the following condition is met: The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than a first threshold. The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to the second threshold. The difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is greater than a third threshold, or is less than or equal to the third threshold and greater than a fourth threshold.
6. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: If the priority relationship is such that the first type of beam has a higher priority than the second type of beam, and the following condition is met, the terminal beam is controlled to switch to the second type of beam of the third cell: The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than a first threshold. The difference between the measurement result of SSB on the first type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to a second threshold. The difference between the measurement result of the SSB on the second type beam of the first cell and the measurement result of the SSB on the second type beam of the third cell is less than or equal to the fourth threshold and greater than the fifth threshold.
7. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, the terminal is controlled to switch to the second type of beam of the third cell if the following condition is met: The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is less than or equal to the sixth threshold.
8. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, and the following condition is met, the terminal is controlled to switch to the first type of beam in the second cell: The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is greater than the sixth threshold. The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is less than or equal to the seventh threshold.
9. The method according to claim 3, characterized in that, The mobility management of the terminal based on the priority relationship and the beam measurement results reported by the terminal includes: If the priority relationship is such that the second type of beam has a higher priority than the first type of beam, then the terminal is prohibited from switching beams if the following conditions are met: The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the second type beam of the third cell is greater than the sixth threshold. The difference between the measurement result of SSB on the second type beam of the first cell and the measurement result of SSB on the first type beam of the second cell is greater than the seventh threshold.
10. The method according to claim 1, characterized in that, The method further includes: A measurement control message is sent to the terminal so that the terminal can make a beam switching decision and trigger the reporting of the beam measurement results; The measurement control message includes beam priority information and a switching event based on the beam priority configuration.
11. The method according to claim 10, characterized in that, The beam priority information includes: If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam; If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
12. The method according to claim 10, characterized in that, The switching events include: a first event and a second event; The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same; The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
13. A mobility management method, characterized in that, Applied to a terminal, the method includes: The beam measurement results are reported to the base station so that the base station can perform mobility management on the terminal based on the priority relationship between the first type of beam and the second type of beam determined for the terminal and the beam measurement results; The first type of beam is used to cover low-altitude areas, and the second type of beam is used to cover ground areas.
14. The method according to claim 13, characterized in that, The method further includes: The system receives measurement control messages sent by the base station; wherein the measurement control messages include beam priority information and handover events based on beam priority configuration. Based on the measurement control message, a beam switching determination is made, and if a beam switching is determined, the beam measurement result is reported to the base station.
15. The method according to claim 14, characterized in that, The beam priority information includes: If the terminal is located in a low-altitude region, the first type of beam has a higher priority than the second type of beam; If the terminal is located in a ground area, the second type of beam has a higher priority than the first type of beam.
16. The method according to claim 14, characterized in that, The switching events include: a first event and a second event; The first event is used to determine whether to trigger beam switching when the measured beam priorities are the same; The second event is used to determine whether to trigger beam switching when the measured beam priorities are different.
17. A base station, characterized in that, include: A first processor, a first memory, and a first communication bus; The first communication bus is used to establish a communication connection between the first processor and the first memory; The first processor is configured to execute one or more computer programs stored in the first memory to implement the mobility management method according to any one of claims 1-12.
18. A terminal, characterized in that, include: Second processor, second memory, and second communication bus; The second communication bus is used to establish a communication connection between the second processor and the second memory; The second processor is configured to execute one or more computer programs stored in the second memory to implement the mobility management method according to any one of claims 13-16.
19. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the mobility management method as described in any one of claims 1-16.
20. A computer program product, comprising a computer program, characterized in that, When the computer program is executed, it implements the mobility management method as described in any one of claims 1-16.