CN109819500B - Cell selection method, terminal, base station and communication equipment - Google Patents
Cell selection method, terminal, base station and communication equipment Download PDFInfo
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- CN109819500B CN109819500B CN201711163979.4A CN201711163979A CN109819500B CN 109819500 B CN109819500 B CN 109819500B CN 201711163979 A CN201711163979 A CN 201711163979A CN 109819500 B CN109819500 B CN 109819500B
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Abstract
The invention provides a cell selection method, a terminal, a base station and communication equipment. The method comprises the following steps: acquiring a broadcast message sent by a base station, wherein the broadcast message comprises the service height of the priority service of the base station; and selecting the cell according to the service height and the self height of the terminal. The method transmits the broadcast message through the base station, wherein the broadcast message comprises the service height of the priority service of the base station, so that the terminal can select the cell by taking the height as the priority based on the service height of the base station in the received broadcast message, thereby ensuring that the terminals working at different heights can be distinguished and select the proper high priority cell for service, and avoiding the problems of unreasonable occupation or waste of wireless resources caused by frequent selection and wrong selection of the high priority cell.
Description
Technical Field
The present invention relates to the field of wireless technologies, and in particular, to a cell selection method, a terminal, a base station, and a communication device.
Background
With the increasing diversification of terminal types and the expansion of service scenes, besides the geographic horizontal dimension, the mobile communication network also needs to meet the differentiated coverage requirements of the vertical dimension, such as terminals with height characteristics like unmanned aerial vehicles and the like, and scenes like layered coverage of air and buildings. The current outdoor base station of the mobile network is mainly designed for the traditional ground terminal and the ground scene, and the downward inclination angle of the main lobe of the antenna is relatively fixed (about 15 degrees). Due to factors such as side lobe coverage and sight propagation, on one hand, the wireless communication environment of the terminal working at a certain height is obviously different from that of the ground terminal, including the increase of strong signal adjacent cells, irregular distribution of service cells and the like, and more interference is generated on the ground terminal correspondingly; on the other hand, the wireless channel states of the terminals operating at different heights also have differences.
In view of the above, the core idea of research direction in which vertical cell deployment or cell vertical splitting becomes possible is to preferentially serve terminals operating at different heights (called height-first cells) with different cells through hardware or software restriction. Therefore, on one hand, it needs to be ensured that the terminal can select a proper cell according to the self height, and when the height has no good coverage, other cells with high priority can still provide basic service; on the other hand, the terminal should preferentially select the high priority cell highly corresponding to the terminal, and occupy the wireless resources of other high priority cells as little as possible.
When the terminal works at different heights, due to the factors such as antenna side lobe coverage, coverage overlapping areas exist in vertical dimensions of different height priority cells, and some problems exist in the setting of frequency priority, including:
if different high priority cells adopt different frequencies (corresponding priorities are different), in order to ensure that a terminal working at a certain height can correctly select the high priority cell, the frequency of the high priority cell needs to be configured with a higher priority, however, the priority is suitable for all terminals, so that the terminals working at other heights covered by the side lobe of the high priority cell can also select the service, and the effective utilization of wireless resources cannot be ensured.
If different high priority cells use the same frequency, because the frequency priority is not distinguished, a terminal working at a certain height may frequently reselect or switch among the high priority cells, and terminals working at other heights are difficult to distinguish the high priority cells, and the effective utilization of wireless resources cannot be guaranteed.
Disclosure of Invention
The technical scheme of the invention aims to provide a cell selection method, a terminal, a base station and communication equipment, and solves the problem that in the prior art, a terminal cannot distinguish a high-priority cell, so that wireless resources are unreasonably occupied or wasted.
The embodiment of the invention provides a cell selection method, which is applied to a terminal and comprises the following steps:
acquiring a broadcast message sent by a base station, wherein the broadcast message comprises the service height of the priority service of the base station;
and selecting the cell according to the service height and the self height of the terminal.
Preferably, the cell selection method, wherein the service height includes at least two height values or height range values with service priorities arranged from high to low.
Preferably, in the cell selection method, the broadcast message further includes an antenna height value of the base station.
Preferably, the method for cell selection, wherein the method for cell selection according to the service height includes:
acquiring the height of a terminal;
comparing the self-altitude with the service altitude of at least one base station to determine selectable candidate cells;
and according to the candidate cell, carrying out cell selection.
Preferably, the cell selection method, wherein the cell selection according to the candidate cell comprises:
and when the number of the candidate cells is larger than the preset number, performing cell selection on the candidate cells again according to the frequency priority or the S criterion.
Preferably, the cell selection method, wherein the step of obtaining the altitude of the terminal itself includes:
and calculating the self height according to the transmission arrival time length and the vertical arrival angle of the reference signal of the base station.
Preferably, the cell selection method, wherein the step of obtaining the altitude of the terminal itself includes:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in a preset height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
Preferably, the cell selection method, wherein the step of comparing the self altitude with the service altitude of at least one base station to determine a selectable candidate cell comprises:
comparing the self height with the service height of at least one base station, and determining the base station of which the service height is matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
Preferably, the method for selecting a cell, wherein the step of comparing the self altitude with the service altitude of at least one base station and determining a base station with the service altitude matching with the self altitude comprises:
calculating a difference between the self-altitude and the service altitude of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height, wherein the base station is the base station with the service height matched with the self height.
Preferably, the cell selection method further includes:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
The embodiment of the present invention further provides another cell selection method, which is applied to a base station, and includes:
transmitting a broadcast message including a service height of the base station priority service.
Preferably, the cell selection method, wherein the service height includes at least two height values or height range values with service priorities arranged from high to low.
Preferably, in the cell selection method, the broadcast message further includes an antenna height value of the base station.
An embodiment of the present invention further provides a terminal, where the terminal includes:
a transceiver, configured to acquire a broadcast message sent by a base station, where the broadcast message includes a service height of a priority service of the base station;
and the processor is used for carrying out cell selection according to the service height and the self height of the terminal.
Preferably, the terminal, wherein the service height includes at least two height values or height range values with service priorities arranged from high to low.
Preferably, the terminal, wherein the broadcast message further includes an antenna height value of the base station.
Preferably, in the terminal, the processor is specifically configured to:
acquiring the height of a terminal;
comparing the self-altitude with the service altitude of at least one base station to determine selectable candidate cells;
and according to the candidate cell, carrying out cell selection.
Preferably, the terminal, wherein the processor is further configured to:
and when the number of the candidate cells is larger than the preset number, performing cell selection on the candidate cells again according to the frequency priority or the S criterion.
Preferably, in the terminal, the processor calculates the self-altitude according to a transmission arrival duration and a vertical arrival angle of a reference signal of the base station.
Preferably, the terminal, when acquiring the height of the terminal, the processor is specifically configured to:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in a preset height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
Preferably, the terminal, wherein the processor, when comparing the altitude of the terminal with the service altitude of at least one base station and determining a selectable candidate cell, is specifically configured to:
comparing the self height with the service height of at least one base station, and determining the base station of which the service height is matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
Preferably, the terminal, wherein the processor compares the self-altitude with the service altitude of at least one base station, and when determining a base station with the service altitude matching the self-altitude, the processor is specifically configured to:
calculating a difference between the self-altitude and the service altitude of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height, wherein the base station is the base station with the service height matched with the self height.
Preferably, the terminal, wherein the processor is further configured to:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
A specific embodiment of the present invention further provides a base station, including:
a transceiver for transmitting a broadcast message including a service height of the base station priority service.
Preferably, the base station, wherein the service height includes at least two height values or height range values with service priorities arranged from high to low.
Preferably, the base station further includes an antenna height value of the base station in the broadcast message.
The embodiment of the present invention further provides a communication device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor when executing the program implements a cell selection method as defined in any of the above.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the cell selection method as described in any one of the above.
One or more embodiments of the invention have at least the following beneficial effects:
the cell selection method according to the specific embodiment of the present invention sends a broadcast message through a base station, where the broadcast message includes a service height of a priority service of the base station, so that a terminal can perform cell selection with the height as a priority based on the service height of the base station in the received broadcast message, thereby ensuring that terminals working at different heights can distinguish and select a suitable high-priority cell for service, and avoiding the problem of unreasonable occupation or waste of wireless resources due to frequent selection and wrong selection of the high-priority cell.
Drawings
Fig. 1 is a flowchart illustrating a cell selection method according to an embodiment of the present invention;
FIG. 2 is a schematic flowchart of step S120 in FIG. 1;
fig. 3 is a flowchart illustrating a cell selection method according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of an interaction flow between a terminal and a base station according to the cell selection method in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
A first embodiment of the present invention provides a cell selection method, applied to a terminal, as shown in fig. 1, including:
s110, acquiring a broadcast message sent by a base station, wherein the broadcast message comprises a service height of a priority service of the base station;
and S120, selecting the cell according to the service height and the self height of the terminal.
The cell selection method according to the specific embodiment of the present invention sends a broadcast message through a base station, where the broadcast message includes a service height of a priority service of the base station, so that a terminal can perform cell selection with the height as a priority based on the service height of the base station in the received broadcast message, thereby ensuring that terminals working at different heights can distinguish and select a suitable high-priority cell for service, and avoiding the problem of unreasonable occupation or waste of wireless resources due to frequent selection and wrong selection of the high-priority cell.
In the cell selection method according to the first embodiment of the present invention, in step S110, in the broadcast message sent by the base station, the service level of the base station includes at least two level values or level ranges with service priorities arranged from high to low.
Specifically, different service priorities may be determined according to corresponding signal qualities, and in different altitudes or altitude ranges, the higher the signal quality, the higher the service priority level, and the lower the signal quality, the lower the service priority level.
Further, preferably, the service height of the base station may be an absolute value or a relative value, where the relative value is represented as a height difference of a cell antenna of the base station relative to the terminal; the absolute value is expressed as the absolute height of the cell antenna of the base station.
Preferably, in step S110, when the service height of the base station is a relative value, the broadcast message sent by the base station further includes the base station cell antenna height HantennaFor the terminal to determine its absolute height.
In the first embodiment of the present invention, according to fig. 2, step S120 specifically includes:
s121, acquiring the height of the terminal;
s122, comparing the self height with the service height of at least one base station, and determining selectable candidate cells;
and S123, selecting the cell according to the candidate cell.
Specifically, in step S121 according to the first embodiment of the present invention, one implementation of acquiring the height of the terminal may be:
and calculating the self height according to the arrival time and the vertical arrival angle of the reference signal of the base station.
Specifically, the self height may be a relative height of the terminal with respect to the base station cell antenna or an absolute height of the terminal.
When the height of the terminal is the relative height H of the terminal relative to the base station cell antennaue,relAccording to the reference signal transmission arrival time T of the base stationarrivalAnd perpendicular angle of arrival AarrivalThe following formula one can be adopted for calculating the self height:
where C is the speed of light.
Wherein, the time length T of reference signal transmissionarrivalThe time length from the transmission of the reference signal from the base station to the reception of the terminal may be obtained by subtracting the time point at which the reference signal is transmitted from the base station from the time point at which the reference signal is received by the terminal. When the height of the terminal is the absolute height H of the terminal relative to the base station cell antennaue,abs lThe process of calculating the self height comprises the following steps: calculating the relative height H according to the formula Iue,rel；
Relative height H obtained by calculationue,relThe absolute height H is further calculated by the following formula IIue,abs l：
Hue,abs＝Hantenna+Hue,rel；
Wherein HantennaThe base station cell antenna height may be included in a broadcast message of the base station, and the terminal is informed by the broadcast message.
By adopting the mode, the relative height of the terminal can be calculated by utilizing the arrival time and the vertical arrival angle of the reference signal of the base station; when the broadcast message of the base station also comprises the antenna height of the base station cell, the absolute height of the terminal can be further calculated.
In step S121 according to the first embodiment of the present invention, another implementation manner of acquiring the height of the terminal may be:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in the same height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
By adopting the mode, the terminal judges the self height according to the acquired service heights of the plurality of base stations, when the service height in the broadcast message of the base station is the absolute height, the terminal can judge and acquire the self absolute height, and when the service height in the broadcast message of the base station is the relative height, the terminal can judge and acquire the self relative height.
Specifically, the terminal counts the service heights and the reference signal qualities of the obtained multiple base stations, and if it is determined that the service heights of a preset number of base stations are all located in the same height range (preset height range) and the reference signal quality is greater than a preset quality value in the multiple base stations, it is determined that the self height is located in the preset height range. If the preset number of base stations is three-fourths of the total number of all base stations obtained by searching, and the service heights of the base stations are all located in the same height range, it can be determined that the height of the terminal is located in the height range.
Specifically, according to the determined preset height range, the height of the terminal itself may be determined to be a middle value of the preset height range.
In addition, when a plurality of height values with the same value exist in the preset height range, the height of the terminal can be determined to be the height value with the same value.
By adopting the mode, the terminal can determine the height of the terminal according to the service height broadcasted by the base station and the reference signal quality of the cell.
Preferably, when the height of the terminal is obtained in the above two manners, the method further includes:
when the terminal itself is provided with an altitude detection means (such as a global positioning system GPS or a barometer), the own altitude of the terminal obtained in the above manner is compared with a result detected by the altitude detection means provided on the terminal to verify the own altitude obtained by the calculation and determine a final own altitude.
In the embodiment of the present invention, with reference to fig. 2, step S122 compares the self-altitude with the service altitude of at least one base station, and the step of determining the selectable candidate cell specifically includes:
comparing the self height with the service height of at least one base station, and determining the base station with the service height matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
Through step S122, a cell with a service height of the base station matching the self height of the terminal is selected as a candidate cell from the service heights of at least one base station, that is, the self height of the terminal should be within the range of the service height of the candidate cell. Specifically, the step of comparing the self height with the service height of at least one base station and determining the base station with the service height matched with the self height comprises the following steps:
calculating the difference between the self height and the service height of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height as the base station with the service height matched with the self height.
Based on the mode, the terminal calculates the difference between the height of the terminal and the service height of each base station, and determines the cell corresponding to the minimum difference as a candidate cell. Specifically, when the difference is zero, the self height of the terminal is completely matched with the service height of the base station, and the candidate cell is the base station cell with the service height corresponding to the difference being zero; when the difference is not equal to zero, determining the cell corresponding to the minimum absolute value of the difference as a candidate cell according to a predetermined convention; or according to the prearranged or the upward matching of the network side indication, the service height of the base station is determined to be higher than the self height of the terminal, and the cell corresponding to the minimum difference between the service height and the self height is a candidate cell; in addition, it may also be determined that the service height of the base station is lower than the self height of the terminal according to a predetermined agreement or downward matching indicated by the network side, and the cell corresponding to the minimum absolute value of the difference between the service height and the self height is the candidate cell.
The method for selecting a cell according to the first embodiment of the present invention, based on the steps shown in fig. 1, preferably further includes:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
By utilizing the process, the service height of the base station in the current neighbor cell configuration is compared with the self height of the terminal, and if the difference between the current self height of the terminal and the service height of the base station in the neighbor cell configuration is determined to be small and the current signal intensity is high, the cell selection is not required to be started so as to obtain the base station cell with the smaller difference between the service height and the self height of the terminal.
In the cell selection method according to the first embodiment of the present invention, on the other hand, according to fig. 2, in step S123,
when the number of the candidate cells is less than or equal to the preset number, for example, less than or equal to 2, cell selection can be directly performed according to the determined candidate cells, and one of the candidate cells is selected as a handover cell;
and when the number of the candidate cells is larger than the preset number, for example, larger than 2, performing cell selection on the candidate cells again according to the frequency priority or the S criterion.
Based on the above manner, in the cell selection method according to the first embodiment of the present invention, when the number of candidate cells is greater than the preset number, the candidate cells may be cell-selected again according to the frequency priority or the S criterion, so as to ensure that the terminals operating at different heights respectively select suitable high priority cells for service, and avoid the problem of unreasonable occupation or waste of wireless resources due to the terminal being unable to distinguish the high priority cells, compared with the cell selection method in the prior art, on the basis of cell selection according to the frequency priority or the S criterion, the cell selection method based on the high priority is added.
In the above embodiments of the present invention, it can be understood that the reselection of the cell should also be one implementation process of the above cell selection.
The present invention also provides a cell selection method according to a second embodiment, which is applied to a base station, wherein as shown in fig. 3, the cell selection method includes:
and S310, sending a broadcast message including the service height of the priority service of the base station.
The cell selection method according to the specific embodiment of the present invention sends a broadcast message through a base station, where the broadcast message includes a service height of a priority service of the base station, so that a terminal can select a cell with the height as a priority based on the service height of the base station in the received broadcast message, thereby ensuring that terminals working at different heights can distinguish and select a suitable cell with the height priority for service, and avoiding the problem of unreasonable occupation or waste of wireless resources due to frequent selection and wrong selection of the cell with the height priority.
Specifically, the cell corresponding to the base station capable of transmitting the service height including the priority service is formed as a high priority cell.
In the second embodiment of the present invention, in step S310, in the broadcast message sent by the base station, the service level of the base station includes at least two level values or level ranges with service priorities arranged from high to low.
Specifically, different service priorities may be determined according to corresponding signal qualities, and in different altitudes or altitude ranges, the higher the signal quality, the higher the service priority level, and the lower the signal quality, the lower the service priority level.
Further, preferably, the service height of the base station may be an absolute value or a relative value, where the relative value is represented as a height difference of a cell antenna of the base station relative to the terminal; the absolute value is expressed as the absolute height of the cell antenna of the base station.
Preferably, in step S310, when the service height of the base station is a relative value, the broadcast message sent by the base station further includes the base station cell antenna height HantennaFor the terminal to determine its absolute height and further perform cell selection。
Specifically, with reference to fig. 4, a specific process of using the cell selection method according to the embodiment of the present invention may include the steps of:
s410, the base station broadcasts the service height of the priority service of the base station through the broadcast message;
s420, the terminal acquires the service height of at least one base station;
s430, the terminal compares the self height with the acquired service height of at least one base station to determine selectable candidate cells;
s440, the terminal selects the cell according to the determined candidate cell.
Specifically, in the steps S430 to S440, the terminal obtains the self-altitude, compares the self-altitude with the service altitude of the base station, and performs the cell selection process, which may be determined according to the detailed description in the embodiment and will not be described herein again.
Another embodiment of the present invention further provides a terminal, which specifically includes:
a transceiver, configured to acquire a broadcast message sent by a base station, where the broadcast message includes a service height of a priority service of the base station;
and the processor is used for carrying out cell selection according to the service height and the self height of the terminal.
In the terminal according to the specific embodiment of the present invention, the base station sends the broadcast message, where the broadcast message includes the service height of the priority service of the base station, so that the terminal can perform cell selection with the height as the priority based on the service height of the base station in the received broadcast message, thereby ensuring that terminals working at different heights can distinguish and select a suitable cell with the height priority for service, and avoiding the problem of unreasonable occupation or waste of wireless resources due to frequent selection and wrong selection of the cell with the height priority.
In particular, the service height comprises at least two height values or height range values with service priorities arranged from high to low.
Different service priorities can be determined according to corresponding signal qualities, and in different heights or height ranges, the higher the signal quality, the higher the service priority level, and the lower the signal quality, the lower the service priority level.
In addition, the service height of the base station may be an absolute value or a relative value, where the relative value is represented as a height difference of a cell antenna of the base station relative to the terminal; the absolute value is expressed as the absolute height of the cell antenna of the base station.
Preferably, the broadcast message further includes an antenna height value of the base station, so that the terminal determines its absolute height.
In an embodiment of the present invention, the processor is specifically configured to:
acquiring the height of a terminal;
comparing the self-altitude with the service altitude of at least one base station to determine selectable candidate cells;
and according to the candidate cell, carrying out cell selection.
Preferably, the processor is further configured to:
and when the number of the candidate cells is larger than the preset number, performing cell selection on the candidate cells again according to the frequency priority or the S criterion.
Based on the above manner, when the number of candidate cells is greater than the preset number, the candidate cells may be subjected to cell selection again according to the frequency priority or the S criterion, so that compared with the cell selection method in the prior art, on the basis of performing cell selection according to the frequency priority or the S criterion, a cell selection method based on a high priority is added to ensure that terminals working at different heights respectively select appropriate high priority cells for service, thereby avoiding the problem of unreasonable occupation or waste of wireless resources due to the fact that the terminals cannot distinguish the high priority cells.
In one implementation manner of the terminal according to the embodiment of the present invention, the processor calculates the self-height according to a transmission arrival time length and a vertical arrival angle of a reference signal of the base station.
Specifically, the manner of calculating the self-height according to the arrival time of the reference signal and the vertical arrival angle of the base station may refer to the detailed description in the first embodiment, and is not described herein again.
In another embodiment of the terminal according to the embodiment of the present invention, when obtaining the self-height of the terminal, the processor is specifically configured to:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in a preset height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
In this embodiment of the present invention, when the processor compares the self-altitude with the service altitude of at least one base station to determine a selectable candidate cell, the processor is specifically configured to:
comparing the self height with the service height of at least one base station, and determining the base station of which the service height is matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
Wherein, the processor compares the self-height with the service height of at least one base station, and when determining the base station with the service height matched with the self-height, the processor is specifically configured to:
calculating a difference between the self-altitude and the service altitude of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height, wherein the base station is the base station with the service height matched with the self height.
Specifically, when the difference is zero, the self height of the terminal is completely matched with the service height of the base station, and the candidate cell is the base station cell with the service height corresponding to the difference being zero; when the difference is not equal to zero, determining the cell corresponding to the minimum absolute value of the difference as a candidate cell according to a predetermined convention; or according to the prearranged or the upward matching of the network side indication, the service height of the base station is determined to be higher than the self height of the terminal, and the cell corresponding to the minimum difference between the service height and the self height is a candidate cell; in addition, it may also be determined that the service height of the base station is lower than the self height of the terminal according to a predetermined agreement or downward matching indicated by the network side, and the cell corresponding to the minimum absolute value of the difference between the service height and the self height is the candidate cell.
In addition, in the terminal according to the specific embodiment of the present invention, the processor is further configured to:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
By utilizing the process, the service height of the base station in the current neighbor cell configuration is compared with the self height of the terminal, and if the difference between the current self height of the terminal and the service height of the base station in the neighbor cell configuration is determined to be small and the current signal intensity is high, the cell selection is not required to be started so as to obtain the base station cell with the smaller difference between the service height and the self height of the terminal.
The terminal according to the specific embodiment of the present invention provides a cell selection mechanism based on a high priority, and by comparing the height of the terminal itself with the service height of the base station, it is ensured that terminals working at different heights distinguish and select a suitable high priority cell for service, and the problem of frequently selecting and erroneously selecting a high priority cell is avoided.
Another aspect of the present invention provides a base station, including:
a transceiver for transmitting a broadcast message including a service height of the base station priority service.
Specifically, the cell corresponding to the base station capable of transmitting the service height including the priority service is formed as a high priority cell.
Preferably, the service height comprises at least two height values or height range values with service priorities arranged from high to low.
Different service priorities can be determined according to corresponding signal qualities, and in different heights or height ranges, the higher the signal quality, the higher the service priority level, and the lower the signal quality, the lower the service priority level.
Preferably, the service height of the base station can be an absolute value or a relative value, wherein the relative value is represented as a height difference of a cell antenna of the base station relative to the terminal; the absolute value is expressed as the absolute height of the cell antenna of the base station.
In addition, the broadcast message further includes an antenna height value of the base station, so that the terminal determines its own absolute height and further performs cell selection.
The base station according to the specific embodiment of the present invention transmits the broadcast message including the service height of the priority service, so that the terminal can select the cell based on the service height of the base station in the received broadcast message, with the height as the priority, ensure that the terminals working at different heights distinguish and select the appropriate high priority cell for service, and avoid the problem that the radio resource is unreasonably occupied or wasted due to frequent selection and wrong selection of the high priority cell.
In another aspect, a communication device is provided, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor; the processor when executing the program implements a cell selection method as defined in any of the above.
Specifically, the communication device may be a base station or a terminal, and when the communication device is a terminal, the communication device is configured to perform the steps in the cell selection method according to any one of the above embodiments; when the communication device is a base station, the method is configured to perform the steps in the cell selection method according to any of the second embodiment.
Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the program, when executed by a processor, implements the steps in the cell selection method as described in any one of the above.
As will be understood by those skilled in the art from the detailed description of fig. 1 to 4 and the above description, the detailed implementation structure of the communication device or the computer-readable storage medium using the cell selection method according to the embodiment of the present invention will not be described in detail herein.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (26)
1. A cell selection method applied to a terminal is characterized by comprising the following steps:
acquiring a broadcast message sent by a base station, wherein the broadcast message comprises the service height of the priority service of the base station;
and selecting the cell according to the service height and the self height of the terminal.
2. The cell selection method of claim 1, wherein the service heights comprise at least two height values or height range values with service priorities arranged from high to low.
3. The cell selection method of claim 1, wherein the broadcast message further includes an antenna height value of the base station.
4. The method of claim 1, wherein the method of cell selection according to the service height comprises:
acquiring the height of a terminal;
comparing the self-altitude with the service altitude of at least one base station to determine selectable candidate cells;
and selecting the cell according to the candidate cell.
5. The cell selection method according to claim 4, wherein the step of performing cell selection based on the candidate cell comprises:
and when the number of the candidate cells is larger than the preset number, carrying out cell selection on the candidate cells again according to the frequency priority or the S criterion.
6. The cell selection method of claim 4, wherein the step of obtaining the self-height of the terminal comprises:
and calculating the self height according to the transmission arrival time length and the vertical arrival angle of the reference signal of the base station.
7. The cell selection method of claim 4, wherein the step of obtaining the self-height of the terminal comprises:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in a preset height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
8. The cell selection method of claim 4, wherein the step of comparing the self altitude with the service altitude of at least one base station to determine selectable candidate cells comprises:
comparing the self height with the service height of at least one base station, and determining the base station of which the service height is matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
9. The cell selection method of claim 8, wherein the step of comparing the self altitude with the service altitude of at least one base station and determining the base station with the service altitude matching the self altitude comprises:
calculating a difference between the self-altitude and the service altitude of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height, wherein the base station is the base station with the service height matched with the self height.
10. The method of claim 1, further comprising:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
11. A cell selection method applied to a base station, the method comprising:
transmitting a broadcast message including a service height of the base station priority service;
wherein the service height comprises at least two height values or height range values with service priorities arranged from high to low.
12. The cell selection method of claim 11, wherein the broadcast message further includes an antenna height value of the base station.
13. A terminal, comprising:
a transceiver, configured to acquire a broadcast message sent by a base station, where the broadcast message includes a service height of a priority service of the base station;
and the processor is used for carrying out cell selection according to the service height and the self height of the terminal.
14. The terminal of claim 13, wherein the service heights comprise at least two height values or height range values with service priorities arranged from high to low.
15. The terminal of claim 13, wherein the broadcast message further comprises an antenna height value of the base station.
16. The terminal of claim 13, wherein the processor is specifically configured to:
acquiring the height of a terminal;
comparing the self-altitude with the service altitude of at least one base station to determine selectable candidate cells;
and selecting the cell according to the candidate cell.
17. The terminal of claim 16, wherein the processor is further configured to:
and when the number of the candidate cells is larger than the preset number, carrying out cell selection on the candidate cells again according to the frequency priority or the S criterion.
18. The terminal of claim 16, wherein the processor calculates the self-height according to a reference signal transmission arrival time and a vertical arrival angle of the base station.
19. The terminal of claim 16, wherein the processor, when obtaining the terminal's own altitude, is specifically configured to:
acquiring the service heights of a plurality of base stations and the reference signal quality of the plurality of base stations;
and if the service heights of a preset number of base stations in the plurality of base stations are all located in a preset height range and the reference signal quality is greater than a preset quality value, determining that the self height is located in the preset height range.
20. The terminal of claim 16, wherein the processor, when comparing the self altitude with the service altitude of at least one base station to determine selectable candidate cells, is specifically configured to:
comparing the self height with the service height of at least one base station, and determining the base station of which the service height is matched with the self height;
and determining the cell corresponding to the base station with the service height matched with the self height as the candidate cell.
21. The terminal of claim 20, wherein the processor compares the self-altitude with the service altitude of at least one base station, and when determining a base station with the service altitude matching the self-altitude, is specifically configured to:
calculating a difference between the self-altitude and the service altitude of each base station;
and determining the base station corresponding to the minimum absolute value of the difference between the service height and the self height, wherein the base station is the base station with the service height matched with the self height.
22. The terminal of claim 13, wherein the processor is further configured to:
acquiring the height of a terminal;
comparing the self height with the service heights of the priority services of all base stations in the current neighbor configuration;
if the difference between the service height of the priority service of each base station in the current neighbor cell configuration and the height of the base station is greater than a preset difference, and the signal intensity of the current cell of the terminal is higher than a preset value, cell selection is not required according to the service height; otherwise, starting the process of selecting the cell according to the service height.
23. A base station, comprising:
a transceiver for transmitting a broadcast message including a service height of the base station priority service;
wherein the service height comprises at least two height values or height range values with service priorities arranged from high to low.
24. The base station of claim 23, wherein the broadcast message further comprises an antenna height value of the base station.
25. A communication device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor; the processor, when executing the program, implements the cell selection method of any one of claims 1 to 10 or the cell selection method of any one of claims 11 to 12.
26. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the cell selection method according to any one of claims 1 to 10 or the cell selection method according to any one of claims 11 to 12.
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| CN111836322B (en) * | 2019-06-05 | 2023-04-28 | 北京骑胜科技有限公司 | Communication method, device, equipment and medium for sharing equipment |
| WO2021134496A1 (en) * | 2019-12-31 | 2021-07-08 | 华为技术有限公司 | Communication method and apparatus |
| CN111144954A (en) * | 2019-12-31 | 2020-05-12 | 聚好看科技股份有限公司 | Display resource releasing method and device |
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