CN114696884A - Method for dividing coverage area of satellite, switching method and related equipment - Google Patents
Method for dividing coverage area of satellite, switching method and related equipment Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
Abstract
The method comprises the steps of obtaining motion direction configuration information of a satellite, taking a motion direction represented by the motion direction configuration information of the satellite as a target direction, and dividing a beam coverage area of the satellite in a dividing mode that the coverage area of a cell in the target direction is larger than a set range threshold to obtain a plurality of cells. In addition, after the terminal prolongs the residence time of the terminal in each cell, the switching times can be reduced, and the signaling overhead of the air interface due to frequent measurement and switching configuration can be reduced.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a method for dividing a coverage area of a satellite, a method for handover, and a related device.
Background
At present, the global coverage of the wireless Internet can be realized through a satellite relay existing communication protocol (4G \5G), and the adopted satellite types comprise a synchronous satellite, a low-orbit satellite and other low-earth orbit satellites.
Since the satellite has a large coverage area on the ground, such a large coverage area is not suitable for serving terrestrial users through only one logical cell, and thus, it needs to be divided into finer cells. The low earth orbit satellite is in a high-speed flight state relative to the ground originally, and the coverage area of one satellite is subdivided into more cells, so that the stay time of the terminal in each cell is too short, and the cells of the terminal are frequently switched. The terminal cannot stay in each cell for a long time, so that the terminal does not have enough time to report the measurement result, the satellite base station is difficult to obtain an accurate measurement result, and cell switching based on measurement cannot be performed.
In addition, the frequent switching of the terminal cell may cause the air interface to be configured by frequent measurement and switching, and the signaling overhead is large.
Disclosure of Invention
In order to solve the foregoing technical problems, embodiments of the present application provide a method for dividing a coverage area of a satellite, a handover method, and related devices, so as to achieve the purposes of supporting cell handover based on measurement, reducing handover times, and reducing signaling overhead of an air interface due to frequent measurement and handover configuration, and the technical solution is as follows:
a method of partitioning a coverage area of a satellite, comprising:
acquiring motion direction information of a satellite;
dividing a beam coverage area of the satellite by taking a movement direction represented by the movement direction information of the satellite as a target direction in a dividing mode that the coverage area of a cell in the target direction is larger than a set range threshold value, so as to obtain a plurality of cells, wherein the set range threshold value is set on the basis of a condition of reducing the number of times of terminal switching;
configuring the satellite based on the information related to each cell.
Optionally, the dividing the beam coverage area of the satellite in a dividing manner that the coverage area of the cell in the target direction is greater than a set range threshold to obtain a plurality of cells includes:
and dividing the beam coverage area of the satellite in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold value and the coverage area of the cell in the target direction is larger than the coverage areas of the cells in other directions to obtain a plurality of cells.
Optionally, the dividing the beam coverage area of the satellite in a dividing manner that the coverage area of the cell in the target direction is greater than a set range threshold and the coverage area of the cell in the target direction is greater than the coverage areas of the cells in other directions to obtain a plurality of cells includes:
determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, and respectively using the straight lines as long axes;
and respectively determining short shafts matched with the long shafts, wherein the long shafts are larger than the short shafts, and respectively taking an elliptical area, which belongs to each long shaft and the short shaft matched with the long shaft in the beam coverage area of the satellite and has a coverage range in the target direction larger than a set range threshold value, as a cell.
Optionally, the determining, in the beam coverage area of the satellite, straight lines of which the directions are consistent with the target direction and are respectively used as long axes includes:
and determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, wherein the straight lines are formed by intersecting the boundaries of the two end points and the beam coverage area of the satellite and are respectively used as long axes.
The areas covered by the plurality of cells include beam coverage areas of the satellites.
A method of handover, comprising:
when a terminal accesses a satellite, sending measurement configuration information to the terminal so that the terminal measures the signal quality of a current service cell based on the measurement configuration information, and reporting a cell switching request when the signal quality of the current service cell is lower than a set threshold value; the current serving cell is one of a plurality of cells obtained by the satellite according to any one of the division methods;
receiving the cell switching request, and issuing a neighbor cell search instruction to the terminal so that the terminal searches neighbor cells, measures the signal quality of each neighbor cell when at least one neighbor cell is searched, and reports the signal quality of each neighbor cell to the satellite;
and judging whether the terminal needs to be switched from the current service cell to the adjacent cell or not based on the signal quality of each adjacent cell and the signal quality of the current service cell.
Optionally, the method further includes:
for each cell, configuring the relationship between the cell and the first adjacent cell as an asymmetric adjacent cell relationship, wherein the asymmetric adjacent cell relationship represents that the cell is allowed to be switched to the first adjacent cell and the first adjacent cell is not allowed to be switched back to the cell;
the first adjacent cell is a cell with signals overlapped with other satellites and the cell.
Optionally, the method further includes:
and configuring the priority of the neighbor cell switching between the satellite and other satellites to be higher than the priority of the neighbor cell switching in the satellite.
An apparatus for dividing a coverage area of a satellite, comprising:
the acquisition module is used for acquiring the motion direction information of the satellite;
a dividing module, configured to divide a beam coverage area of the satellite in a dividing manner that a coverage area of a cell in the target direction is greater than a set range threshold, to obtain multiple cells, where a moving direction represented by moving direction information of the satellite is used as a target direction, and the set range threshold is set based on a condition that terminal switching times are reduced;
a configuration module for configuring the satellite based on the information related to each cell.
Optionally, the dividing module is specifically configured to:
and dividing the beam coverage area of the satellite in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold value and the coverage area of the cell in the target direction is larger than the coverage areas of the cells in other directions to obtain a plurality of cells.
Optionally, the dividing module is specifically configured to:
determining a plurality of straight lines with the direction consistent with the target direction in the beam coverage area of the satellite, and respectively taking the straight lines as long axes;
and respectively determining short shafts matched with the long shafts, wherein the long shafts are larger than the short shafts, and respectively taking an elliptical area, which belongs to each long shaft and the short shaft matched with the long shaft in the beam coverage area of the satellite and has a coverage range in the target direction larger than a set range threshold value, as a cell.
Optionally, the dividing module is specifically configured to:
and determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, wherein the straight lines are formed by intersecting the boundaries of the two end points and the beam coverage area of the satellite and are respectively used as long axes.
Optionally, the coverage area of the multiple cells includes a beam coverage area of the satellite.
A switching device, comprising:
a sending module, configured to, when obtaining motion direction configuration information of a satellite, take a motion direction represented by the motion direction configuration information of the satellite as a target direction, divide a beam coverage area of the satellite in a division manner in which a coverage area of a cell in the target direction is larger than coverage areas of cells in other directions, and obtain a plurality of cells, send measurement configuration information to a terminal when the terminal accesses the satellite, so that the terminal measures signal quality of a current serving cell based on the measurement configuration information, and report a cell handover request when the signal quality of the current serving cell is lower than a set threshold value, where the current serving cell is one of the cells;
the instruction issuing module is used for receiving the cell switching request and issuing an adjacent cell searching instruction to the terminal so as to enable the terminal to search adjacent cells, measure the signal quality of each adjacent cell when at least one adjacent cell is searched, and report the signal quality of each adjacent cell to the satellite;
and the judging module is used for judging whether the terminal needs to be switched from the current service cell to the adjacent cell or not based on the signal quality of each adjacent cell and the signal quality of the current service cell.
Optionally, the apparatus further comprises:
a first configuration module, configured to configure, for each cell, a relationship between the cell and a first neighboring cell thereof as an asymmetric neighboring cell relationship, where the asymmetric neighboring cell relationship represents that the cell is allowed to be switched to the first neighboring cell thereof, and the first neighboring cell is not allowed to be switched back to the cell;
the first adjacent cell is a cell with signals overlapped with other satellites and the cell.
Optionally, the apparatus further comprises:
and the second configuration module is used for configuring that the priority of the neighbor cell switching between the satellite and other satellites is higher than the priority of the neighbor cell switching in the satellite.
A server, comprising: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor, when executing the program, is configured to implement the steps of the method for dividing a coverage area of a satellite according to any of claims 1 to 6.
A satellite communication station, comprising: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor is configured to implement each step of the handover method according to any one of the above-mentioned embodiments when executing the program.
Compared with the prior art, the beneficial effects of this application do:
in the method, the beam coverage area of the satellite is divided by obtaining the movement direction configuration information of the satellite and taking the movement direction represented by the movement direction configuration information of the satellite as a target direction in a dividing mode that the coverage area of a cell in the target direction is larger than a set range threshold value to obtain a plurality of cells, so that the divided cells have a larger range in the target direction and meet the requirement of reducing the switching times of a terminal. In addition, after the terminal prolongs the residence time of the terminal in each cell, the switching times can be reduced, and the signaling overhead of the air interface due to frequent measurement and switching configuration can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic flowchart of a method for dividing a coverage area of a satellite according to embodiment 1 of the present application;
fig. 2 is a flowchart illustrating a method for dividing a coverage area of a satellite according to embodiment 2 of the present application;
fig. 3 is a flowchart illustrating a method for dividing a coverage area of a satellite according to embodiment 3 of the present application;
FIG. 4 is a schematic diagram illustrating a scenario of dividing a coverage area of a satellite according to the present application;
fig. 5 is a schematic view of a division scenario of a coverage area of another satellite provided in the present application;
fig. 6 is a flowchart illustrating a method for dividing a coverage area of a satellite according to embodiment 4 of the present application;
FIG. 7 is a schematic diagram illustrating a scenario of dividing a coverage area of another satellite provided by the present application;
fig. 8 is a flowchart illustrating a method for dividing a coverage area of a satellite according to embodiment 5 of the present application;
FIG. 9 is a schematic diagram illustrating a scenario of division of a coverage area of another satellite provided in the present application;
fig. 10 is a schematic diagram of a handover scenario of a terminal in an overlapping area of a satellite 1 and a satellite 2;
fig. 11 is a schematic logical structure diagram of a device for dividing a coverage area of a satellite according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a flowchart of a method for dividing a coverage area of a satellite according to embodiment 1 of the present application is shown, where the method for dividing a coverage area of a satellite may be applied to a server, as shown in fig. 1, and the method may include, but is not limited to, the following steps:
and step S11, acquiring the motion direction information of the satellite.
In this embodiment, the coverage area of the satellite may be divided in advance before the satellite operates. Specifically, the motion direction information of the satellite can be obtained from the configuration parameters of the satellite. Of course, the information of the moving direction of the satellite can also be uploaded artificially. The motion direction information of the satellite may be, but is not limited to: and configuring information of the motion direction of the satellite.
The motion direction information of the satellite can be acquired from the configuration parameters of the satellite once every set time, and the motion direction information after the satellite is updated can be acquired in time when the motion direction configuration information of the satellite in the configuration parameters is updated.
The setting time can be set according to needs, and is not limited in the application.
Under the condition of manually uploading the movement direction information of the satellite, if the movement direction information of the satellite changes, the movement direction information of the satellite can be manually uploaded in time, and the timeliness of acquiring the movement direction information of the satellite is ensured.
The motion direction information of the satellite may characterize the motion direction of the satellite, e.g., moving from south to north.
In this embodiment, the satellite may be, but is not limited to: a low orbit satellite.
Step S12, taking the motion direction represented by the motion direction information of the satellite as a target direction, and dividing the beam coverage area of the satellite in a dividing manner that the coverage area of a cell in the target direction is greater than a set range threshold, so as to obtain a plurality of cells, where the set range threshold is set based on a condition of reducing the number of times of terminal handover.
The beam coverage area of the satellite is divided in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold, the coverage area of the divided cell in the target direction can be larger, the requirement for reducing the switching times of the terminal is met, the stay time of the terminal in each cell can be prolonged when the satellite moves in the target direction, the terminal can report the measurement result within enough time, the accuracy of the measurement result obtained by a satellite base station is ensured, and therefore cell switching based on measurement is supported.
It should be noted that, the overlapping area between different cells may be set according to the requirement of the terminal measurement. The size of the overlap region is not limited in this application.
It is understood that in order to ensure the reliability of communication, a plurality of satellites may be required to operate, and the cell division before each satellite operates may be performed in the division manner described in steps S11-S12. Of course, with the partitioning method introduced in steps S11-S12, there may be a case where the partitioned cells do not completely cover the beam coverage area of the satellite, in which case, by setting the overlapping area of multiple satellites, it is ensured that the beam coverage area of each satellite can be completely covered by the cells belonging to different satellites, and the reliability of terminal communication is ensured.
In this embodiment, the specific implementation of the multiple cells is obtained by dividing the beam coverage area of the satellite in a dividing manner that the coverage area of the cell in the target direction is greater than a set range threshold, which may be, but is not limited to:
and dividing the beam coverage area of the satellite in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold value and the coverage area of the cell in the target direction is equal to the coverage areas of the cells in other directions to obtain a plurality of cells.
Step S13, configuring the satellite based on the information related to each cell.
In this embodiment, the information related to each cell may include, but is not limited to: coverage of cells and overlap between cells.
After the plurality of cells are obtained through division, the satellite may be configured according to the information related to each cell, specifically, the angle of the antenna of the satellite and the like may be configured, so that the coverage area of each antenna is matched with the coverage area of the corresponding cell.
In the method, the beam coverage area of the satellite is divided by obtaining the movement direction configuration information of the satellite and taking the movement direction represented by the movement direction configuration information of the satellite as a target direction in a dividing mode that the coverage area of a cell in the target direction is larger than a set range threshold value to obtain a plurality of cells, so that the divided cells have a larger range in the target direction and meet the requirement of reducing the switching times of a terminal. In addition, after the terminal prolongs the residence time of the terminal in each cell, the switching times can be reduced, and the signaling overhead of the air interface due to frequent measurement and switching configuration can be reduced.
As another alternative embodiment of the present application, referring to fig. 2, a flowchart of a method for dividing a coverage area of a satellite according to embodiment 2 of the present application is provided, where this embodiment mainly relates to a refinement of the method for dividing a coverage area of a satellite described in the foregoing embodiment 1, as shown in fig. 2, the method may include, but is not limited to, the following steps:
and step S21, acquiring the motion direction information of the satellite.
For details of the step S21, reference may be made to the related description of the step S11 in embodiment 1, and details are not repeated here.
Step S22, taking the motion direction represented by the motion direction configuration information of the satellite as a target direction, and dividing the beam coverage area of the satellite in a dividing manner that the coverage area of a cell in the target direction is greater than a set range threshold and the coverage area of the cell in the target direction is greater than the coverage areas of the cells in other directions to obtain a plurality of cells.
In this embodiment, the setting range threshold is set based on a condition of reducing the number of times of terminal switching.
It can be understood that the coverage of the cell in other directions than the target direction has less influence on the requirement of the terminal for performing handover based on the measurement, and therefore, the coverage of the cell in other directions may be weakened, and specifically, the beam coverage area of the satellite may be divided in a dividing manner that the coverage of the cell in the target direction is greater than the set range threshold, and the coverage of the cell in the target direction is greater than the coverage of the cell in other directions.
Step S23, configuring the satellite based on the information related to each cell.
The detailed process of step S23 can be referred to the related description of step S13 in embodiment 1, and is not repeated here.
As another alternative embodiment of the present application, referring to fig. 3, a flowchart of a method for dividing a coverage area of a satellite according to embodiment 3 of the present application is provided, where this embodiment mainly is a refinement of the method for dividing a coverage area of a satellite described in the foregoing embodiment 2, as shown in fig. 3, the method may include, but is not limited to, the following steps:
and step S31, acquiring the motion direction information of the satellite.
Step S32, taking the motion direction represented by the motion direction configuration information of the satellite as a target direction, and determining multiple straight lines with directions consistent with the target direction in the beam coverage area of the satellite, where the multiple straight lines are respectively used as long axes.
Step S33, respectively determining short axes matched with each of the long axes, and respectively regarding an elliptical area, to which each of the long axes and the short axes matched with the long axes in the beam coverage area of the satellite belong, of which the coverage area in the target direction is larger than a set range threshold, as a cell, where the long axis is larger than the short axis.
After the respective major axes are determined, a minor axis matching each of the major axes can be determined. The lengths of the short axes matched with different long axes can have difference with each other or can be kept consistent.
In the case that the lengths of the short axes matched with different long axes may have differences from each other, the divided cells may be referred to as fig. 4, and as shown in fig. 4, the long axes and the short axes of the divided cells 1, 2, and 3 have differences.
In the case that the lengths of the short axes matched with different long axes are all kept consistent, the divided cells can be seen in fig. 5, as shown in fig. 5, and the lengths of the short axes of the divided cells 1, 2, 3, 4 and 5 are consistent.
Steps S32-S33 are a specific implementation of step S22 in example 2.
Step S34, configuring the satellite based on the information related to each cell.
The detailed process of step S34 can be referred to the related description of step S23 in embodiment 2, and is not repeated here.
As another alternative embodiment of the present application, referring to fig. 6, there is provided a flowchart of a method for dividing a coverage area of a satellite according to embodiment 4 of the present application, where this embodiment mainly is a refinement of the method for dividing a coverage area of a satellite described in the above embodiment 3, as shown in fig. 6, the method may include, but is not limited to, the following steps:
and step S41, acquiring the motion direction information of the satellite.
Step S42, taking the motion direction represented by the motion direction configuration information of the satellite as a target direction, determining multiple straight lines in which the directions are consistent with the target direction and two end points intersect with the beam coverage area of the satellite, and taking the straight lines as long axes respectively.
Step S42 is a specific implementation manner of step S32 in example 3.
And step S43, respectively determining the minor axis matched with each major axis, and respectively taking an elliptical area, to which each major axis and the minor axis matched with the major axis in the beam coverage area of the satellite belong, of which the coverage area in the target direction is larger than a set range threshold value as a cell.
In the case that a plurality of directions are determined to be consistent with the target direction in the beam coverage area of the satellite, and the two end points are respectively taken as long axes of straight lines intersecting at the boundary of the beam coverage area of the satellite, the divided cells may refer to fig. 7, as shown in fig. 7, and the long axes of the cell 1, the cell 2, the cell 3, the cell 4, and the cell 5 intersect at the boundary of the beam coverage area of the satellite.
Step S44, configuring the satellite based on the information related to each cell.
The detailed process of step S44 can be referred to the related description of step S13 in embodiment 1, and is not repeated here.
In this embodiment, it is determined that a plurality of directions are consistent with the target direction in the beam coverage area of the satellite, and a straight line in which two end points intersect with the boundary of the beam coverage area of the satellite is respectively used as a long axis, so that a large range of the divided cell in the target direction can be ensured, the residence time of the terminal in the cell can be prolonged to a large extent, the accuracy of the measurement result obtained by the satellite base station can be improved, and the reliability of cell switching based on measurement can be improved.
As another alternative embodiment of the present application, referring to fig. 8, a flowchart of a method for dividing a coverage area of a satellite according to embodiment 5 of the present application is provided, where this embodiment mainly is a refinement of the method for dividing a coverage area of a satellite described in the above embodiment 3, as shown in fig. 8, the method may include, but is not limited to, the following steps:
and step S51, acquiring the motion direction information of the satellite.
Step S52, taking the motion direction represented by the motion direction configuration information of the satellite as a target direction, determining a plurality of directions in a beam coverage area of the satellite, where the directions are consistent with the target direction, and two end points of the straight line intersect with the beam coverage area of the satellite, taking the determined straight line as a target straight line, dividing all or part of the target straight lines in the plurality of target straight lines respectively to obtain a plurality of sub straight lines, and taking each sub straight line as a long axis.
In this embodiment, the manner and the number of times of dividing each target straight line are not limited.
Step S52 is a specific implementation manner of step S32 in example 3.
Step S53, determining short axes matched with each long axis respectively, and regarding an elliptical area, to which each long axis and the short axis matched with the long axis belong, in the beam coverage area of the satellite and the coverage area in the target direction is larger than a set range threshold, as a cell.
Determining a plurality of straight lines with the same direction as the target direction in the beam coverage area of the satellite, wherein two end points of the straight lines intersect with the beam coverage area of the satellite, taking the determined straight lines as target straight lines, dividing each target straight line to obtain a plurality of sub straight lines, and taking each sub straight line as a long axis respectively, wherein the divided cells can refer to fig. 9, as shown in fig. 9, the target straight lines can be divided into 2 to obtain 2 sub straight lines, the sum of the long axes of the cell 1 and the cell 2 intersects with the boundary of the beam coverage area of the satellite, and the sum of the long axes of the cell 3 and the cell 4 intersects with the boundary of the beam coverage area of the satellite. The major axes of cell 5, cell 6 and cell 7 intersect the boundaries of the beam coverage area of the satellite.
In this embodiment, the process of determining, in the beam coverage area of the satellite, a plurality of directions that are consistent with the target direction and two end points of which intersect with the beam coverage area of the satellite, taking the determined straight line as a target straight line, dividing all or part of the target straight lines in the plurality of target straight lines respectively to obtain a plurality of sub straight lines, taking each sub straight line as a long axis, determining a short axis matching each long axis respectively, and taking each long axis and an elliptical area to which the short axis matching the long axis belongs in the beam coverage area of the satellite as a small area may be, but is not limited to:
and determining a minor axis matched with each major axis according to the principle that the size of each elliptical area is equal, and respectively using the elliptical areas to which each major axis and the matched minor axis belong in the beam coverage area of the satellite as cells. For example, when the major axis 1 is larger than the major axis 2, the minor axis 1 matching the major axis 1 is smaller than the minor axis matching the major axis 2, and the elliptical areas to which the major axis 1 and the minor axis 1 belong are equal in size to the elliptical areas to which the major axis 2 and the minor axis 2 belong.
According to the principle that the size of each elliptical area is equal, the minor axis matched with each major axis is determined, and the elliptical areas to which each major axis and the matched minor axis belong in the beam coverage area of the satellite are respectively used as cells, so that the equal range of each cell can be realized, and the stability of terminal communication is ensured.
The detailed process of step S54 can be referred to the related description of step S13 in embodiment 1, and is not repeated here.
In another embodiment 6 of the present application, another handover method is presented, which may include, but is not limited to, the following steps:
step S61, when obtaining the movement direction configuration information of the satellite, taking the movement direction represented by the movement direction configuration information of the satellite as a target direction, determining the division mode of the range of the expanded size area in the target direction as a template, dividing the beam coverage area of the satellite according to the template to obtain a plurality of cells, when the terminal accesses the satellite, sending the measurement configuration information to the terminal so that the terminal measures the signal quality of the current serving cell based on the measurement configuration information, and when the signal quality of the current serving cell is lower than a set threshold value, reporting a cell switching request.
The current serving cell is one of a plurality of cells.
In this embodiment, details of a process of obtaining a plurality of cells by obtaining motion direction configuration information of a satellite, taking a motion direction represented by the motion direction configuration information of the satellite as a target direction, determining a division manner of a range of an extended size region in the target direction as a template, and dividing a beam coverage area of the satellite according to the template may refer to related descriptions in any one of the method embodiments of embodiments 1 to 5, which are not described herein again.
Step S62, receiving the cell switching request, and issuing an adjacent cell searching instruction to the terminal so that the terminal searches adjacent cells, when at least one adjacent cell is searched, measuring the signal quality of each adjacent cell, and reporting the signal quality of each adjacent cell to the satellite;
step S63, based on the signal quality of each neighboring cell and the signal quality of the current serving cell, determining whether the terminal needs to be switched from the current serving cell to the neighboring cell.
And if the terminal is judged to need to be switched from the current service cell to the adjacent cell, switching the terminal from the current service cell to the adjacent cell.
In this embodiment, for each cell, the relationship between the cell and the first neighboring cell may be configured to be an asymmetric neighboring cell relationship, where the asymmetric neighboring cell relationship represents that the cell is allowed to be switched to the first neighboring cell, and the first neighboring cell is not allowed to be switched back to the cell.
The first adjacent cell is a cell with signals overlapped with other satellites and the cell.
In this embodiment, for each cell, the relationship between the cell and the first neighboring cell is configured to be an asymmetric neighboring cell relationship, which can ensure that the terminal is not switched back to the cell after being switched to the cell of another satellite, and avoid frequent switching.
In this embodiment, it may also be configured that the priority of the neighbor cell switching between the satellite and the other satellite is higher than the priority of the neighbor cell switching in the satellite. After the priority of the neighbor cell handover between the satellite and the other satellite is configured to be higher than the priority of the neighbor cell handover in the satellite, if the priority of the neighbor cell handover is in an overlapping area between the two satellites, the handover from the cell of one satellite to the cell of the other satellite can be completed first, and then the cell handover in the other satellite is performed. As shown in fig. 10, when the satellite 1 and the satellite 2 overlap each other, the terminal performs handover from the cell of the satellite 1 to the cell of the satellite 2, and then performs handover of the cell in the satellite 2.
In this embodiment, on the premise that the movement direction configuration information of the satellite is acquired, the movement direction represented by the movement direction configuration information of the satellite is taken as a target direction, and the beam coverage area of the satellite is divided in a dividing manner that the coverage area of a cell in the target direction is larger than the coverage areas of the cells in other directions, so as to obtain a plurality of cells, cell switching can be performed based on measurement.
Next, a description will be given of a device for dividing a coverage area of a satellite according to the present application, and the device for dividing a coverage area of a satellite described below and the method for dividing a coverage area of a satellite described above may be referred to in correspondence with each other.
Referring to fig. 11, the device for dividing the coverage area of the satellite includes: an acquisition module 100, a division module 200 and a storage module 300.
The acquiring module 100 is configured to acquire motion direction information of a satellite.
A dividing module 200, configured to divide a beam coverage area of the satellite by using a moving direction represented by the moving direction information of the satellite as a target direction and using a dividing manner that a coverage area of a cell in the target direction is greater than a set range threshold, so as to obtain multiple cells, where the set range threshold is set based on a condition that the number of times of terminal handover is reduced.
A configuration module 300 configured to configure the satellite based on the information related to each cell.
In this embodiment, the dividing module 200 may be specifically configured to:
and dividing the beam coverage area of the satellite in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold value and the coverage area of the cell in the target direction is larger than the coverage areas of the cells in other directions to obtain a plurality of cells.
In this embodiment, the dividing module 200 may be specifically configured to:
determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, and respectively using the straight lines as long axes;
and respectively determining short shafts matched with the long shafts, wherein the long shafts are larger than the short shafts, and respectively taking an elliptical area, which belongs to each long shaft and the short shaft matched with the long shaft in the beam coverage area of the satellite and has a coverage range in the target direction larger than a set range threshold value, as a cell.
In this embodiment, the dividing module 200 may be specifically configured to:
and determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, wherein the straight lines are formed by intersecting the boundaries of the two end points and the beam coverage area of the satellite and are respectively used as long axes.
Wherein the areas covered by the plurality of cells comprise beam coverage areas of the satellite.
In another embodiment of the present application, there is provided a switching apparatus including:
a sending module, configured to, when obtaining motion direction configuration information of a satellite, divide a beam coverage area of the satellite by using a division manner in which a coverage area of a cell in the target direction is larger than coverage areas of cells in other directions as a target direction, and obtain multiple cells, send measurement configuration information to a terminal when the terminal accesses the satellite, so that the terminal measures signal quality of a current serving cell based on the measurement configuration information, and report a cell handover request when the signal quality of the current serving cell is lower than a set threshold, where the current serving cell is one of the multiple cells;
the instruction issuing module is used for receiving the cell switching request and issuing an adjacent cell searching instruction to the terminal so as to enable the terminal to search adjacent cells, measure the signal quality of each adjacent cell when at least one adjacent cell is searched, and report the signal quality of each adjacent cell to the satellite;
and the judging module is used for judging whether the terminal needs to be switched from the current service cell to the adjacent cell or not based on the signal quality of each adjacent cell and the signal quality of the current service cell.
In this embodiment, the switching device may further include:
a first configuration module, configured to configure, for each cell, a relationship between the cell and a first neighboring cell thereof as an asymmetric neighboring cell relationship, where the asymmetric neighboring cell relationship represents that the cell is allowed to be switched to the first neighboring cell thereof, and the first neighboring cell is not allowed to be switched back to the cell;
the first adjacent cell is a cell with signals overlapped with other satellites and the cell.
In this embodiment, the switching device may further include:
and the second configuration module is used for configuring that the priority of the neighbor cell switching between the satellite and other satellites is higher than the priority of the neighbor cell switching in the satellite.
In another embodiment of the present application, there is provided a server including: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor, when executing the program, is configured to implement the steps of the method for dividing a coverage area of a satellite as described in any one of method embodiments 1-5.
In another embodiment of the present application, there is provided a satellite communication station including: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor is configured to implement the steps of the handover method as described in method embodiment 6 when executing the program.
It should be noted that each embodiment is mainly described as a difference from the other embodiments, and the same and similar parts between the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
For convenience of description, the above devices are described as being divided into various units by function, and are described separately. Of course, the functionality of the units may be implemented in one or more software and/or hardware when implementing the present application.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The method for dividing the coverage area of the satellite, the method for switching the coverage area of the satellite and the related devices are described in detail above, and a specific example is applied in the text to explain the principle and the implementation of the application, and the description of the above embodiment is only used to help understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (12)
1. A method for partitioning a coverage area of a satellite, comprising:
acquiring motion direction information of a satellite;
taking the motion direction represented by the motion direction information of the satellite as a target direction, and dividing a beam coverage area of the satellite in a dividing manner that the coverage area of a cell in the target direction is greater than a set range threshold to obtain a plurality of cells, wherein the set range threshold is set on the basis of a condition of reducing the number of terminal switching times;
configuring the satellite based on the information related to each cell.
2. The method of claim 1, wherein the dividing the beam coverage area of the satellite in a manner that the coverage area of the cell in the target direction is larger than a set range threshold to obtain a plurality of cells comprises:
and dividing the beam coverage area of the satellite in a dividing mode that the coverage area of the cell in the target direction is larger than a set range threshold value and the coverage area of the cell in the target direction is larger than the coverage areas of the cells in other directions to obtain a plurality of cells.
3. The method of claim 2, wherein the dividing the beam coverage area of the satellite in a manner that the coverage area of the cell in the target direction is larger than a set range threshold and the coverage area of the cell in the target direction is larger than the coverage areas of the cells in other directions to obtain a plurality of cells comprises:
determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, and respectively using the straight lines as long axes;
and respectively determining short shafts matched with the long shafts, wherein the long shafts are larger than the short shafts, and respectively taking an elliptical area, which belongs to each long shaft and the short shaft matched with the long shaft in the beam coverage area of the satellite and has a coverage range in the target direction larger than a set range threshold value, as a cell.
4. The method of claim 3, wherein said determining a plurality of lines having directions that coincide with the target direction in a beam coverage area of the satellite, each as a long axis, comprises:
and determining a plurality of straight lines with the directions consistent with the target direction in the beam coverage area of the satellite, wherein the straight lines are formed by intersecting the boundaries of the two end points and the beam coverage area of the satellite and are respectively used as long axes.
5. The method of claim 1, wherein the area covered by the plurality of cells comprises a beam coverage area of the satellite.
6. A method of handover, comprising:
when a terminal accesses a satellite, sending measurement configuration information to the terminal so that the terminal measures the signal quality of a current service cell based on the measurement configuration information, and reporting a cell switching request when the signal quality of the current service cell is lower than a set threshold value; the current serving cell is one of a plurality of cells obtained by the satellite according to the division method of any one of claims 1 to 5;
receiving the cell switching request, and issuing a neighbor cell search instruction to the terminal so that the terminal searches neighbor cells, measures the signal quality of each neighbor cell when at least one neighbor cell is searched, and reports the signal quality of each neighbor cell to the satellite;
and judging whether the terminal needs to be switched from the current service cell to the adjacent cell or not based on the signal quality of each adjacent cell and the signal quality of the current service cell.
7. The method of claim 6, further comprising:
for each cell, configuring the relationship between the cell and the first adjacent cell as an asymmetric adjacent cell relationship, wherein the asymmetric adjacent cell relationship represents that the cell is allowed to be switched to the first adjacent cell and the first adjacent cell is not allowed to be switched back to the cell;
the first adjacent cell is a cell with signals overlapped with other satellites and the cell.
8. The method of claim 6, further comprising:
and configuring the priority of the neighbor cell switching between the satellite and other satellites to be higher than the priority of the neighbor cell switching in the satellite.
9. An apparatus for dividing a coverage area of a satellite, comprising:
the acquisition module is used for acquiring the motion direction information of the satellite;
a dividing module, configured to divide a beam coverage area of the satellite in a dividing manner that a coverage area of a cell in the target direction is greater than a set range threshold, to obtain multiple cells, where a moving direction represented by moving direction information of the satellite is used as a target direction, and the set range threshold is set based on a condition that terminal switching times are reduced;
a configuration module for configuring the satellite based on the information related to each cell.
10. A switching device, comprising:
a sending module, configured to, when obtaining motion direction configuration information of a satellite, divide a beam coverage area of the satellite by using a division manner in which a coverage area of a cell in the target direction is larger than coverage areas of cells in other directions as a target direction, and obtain multiple cells, send measurement configuration information to a terminal when the terminal accesses the satellite, so that the terminal measures signal quality of a current serving cell based on the measurement configuration information, and report a cell handover request when the signal quality of the current serving cell is lower than a set threshold, where the current serving cell is one of the multiple cells;
the instruction issuing module is used for receiving the cell switching request and issuing an adjacent cell searching instruction to the terminal so as to enable the terminal to search adjacent cells, measure the signal quality of each adjacent cell when at least one adjacent cell is searched, and report the signal quality of each adjacent cell to the satellite;
and the judging module is used for judging whether the terminal needs to be switched from the current service cell to the adjacent cell or not based on the signal quality of each adjacent cell and the signal quality of the current service cell.
11. A server, comprising: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor, when executing the program, is configured to implement the steps of the method for dividing a coverage area of a satellite according to any of claims 1 to 6.
12. A satellite communication station, comprising: a processor, a memory, and a data bus through which the processor and the memory communicate;
the memory is used for storing programs;
the processor, when executing the program, is configured to implement the steps of the handover method according to any one of claims 6 to 7.
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