CN110839262A - Cell reselection method, network side equipment and terminal - Google Patents
Cell reselection method, network side equipment and terminal Download PDFInfo
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- CN110839262A CN110839262A CN201810929514.3A CN201810929514A CN110839262A CN 110839262 A CN110839262 A CN 110839262A CN 201810929514 A CN201810929514 A CN 201810929514A CN 110839262 A CN110839262 A CN 110839262A
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- frequency offset
- doppler frequency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
- H04W36/0088—Scheduling hand-off measurements
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Abstract
The invention provides a cell reselection method, network side equipment and a terminal, and belongs to the technical field of wireless communication. The cell reselection method is applied to a terminal, and comprises the following steps: judging the motion state of the robot, wherein the motion state comprises height information and/or speed information; and determining the reselection priorities of the cells of different types according to the motion state of the cells. The technical scheme of the invention can enable the terminal to reselect the most appropriate target cell.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a cell reselection method, a network device, and a terminal.
Background
The cell reselection scheme of the existing terminal only considers the speed, and the estimation method of the terminal speed is the number of passing (handover or reselection) cells in unit time. In addition, if the terminal considers altitude when performing cell reselection, one possible solution is that the terminal discriminates from altitude information measured by its GPS, but the problem is that the accuracy of the GPS altitude information is limited and the terminal does not know the altitude information of the base station, and thus cannot discriminate whether it is higher than the base station. In summary, the cell reselection scheme of the conventional terminal has limited consideration factors, and cannot ensure that the most suitable target cell is reselected.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a cell reselection method, a network side device and a terminal, which can enable the terminal to reselect an optimal target cell.
To solve the above technical problem, embodiments of the present invention provide the following technical solutions:
in one aspect, a cell reselection method is provided, which is applied to a terminal, and the method includes:
judging the motion state of the robot, wherein the motion state comprises height information and/or speed information;
and determining the reselection priorities of the cells of different types according to the motion state of the cells.
Further, the method further comprises:
receiving a system message issued by a network side device, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
Further, the determining the motion state of the self includes:
and judging the motion speed state of the self according to the threshold value of the Doppler frequency offset.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell with the speed identifier matched with the motion speed state of the cell as the cell with the highest reselection priority.
Further, the threshold includes a first doppler frequency offset threshold and a second doppler frequency offset threshold, the first doppler frequency offset threshold is smaller than the second doppler frequency offset threshold, and the determining the motion speed state according to the doppler frequency offset threshold includes:
calculating the Doppler frequency offset value of the self;
when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
Further, the determining the motion state of the self includes:
and when the received system message of the resident cell carries a flight identifier and the detected neighbor cell is included in the flight neighbor cell list, judging that the resident cell is in a flight state.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell carrying the flight identifier as the cell with the highest reselection priority.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
when the cell is in a flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier and the self movement speed state in all the cells carrying the flight identifier, and setting the closest cell as the cell with the highest reselection priority;
when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
The embodiment of the invention also provides a cell reselection method, which is applied to network side equipment and comprises the following steps:
sending a system message to a terminal, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
The embodiment of the invention also provides a terminal, which comprises a processor and a transceiver,
the processor is used for judging the motion state of the processor, the motion state comprises height information and/or speed information, and the reselection priorities of different types of cells are determined according to the motion state of the processor.
Further, the transceiver is configured to receive a system message sent by a network side device, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
Further, the processor is specifically configured to determine a motion speed state of the processor according to the threshold value of the doppler frequency offset.
Further, the processor is specifically configured to set a cell whose speed identifier matches with its own moving speed state as a cell with the highest reselection priority.
Further, the threshold values include a first doppler frequency offset threshold value and a second doppler frequency offset threshold value, the first doppler frequency offset threshold value is smaller than the second doppler frequency offset threshold value,
the processor is specifically configured to calculate a doppler frequency offset value of the processor; when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
Further, the processor is specifically configured to determine that the processor is in a flight state when the received system message of the cell camping carries a flight identifier and the detected neighboring cell is included in the flying neighboring cell list.
Further, the processor is specifically configured to set a cell carrying a flight identifier as a cell with a highest reselection priority.
Further, the processor is specifically configured to, when the processor is in the flight state, determine a reselection priority of the cell according to a proximity degree of the velocity identifier in all cells carrying the flight identifier to the motion velocity state of the processor, and set a cell closest to the velocity identifier as a cell with a highest reselection priority; when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
The embodiment of the invention also provides a network side device, which comprises a processor and a transceiver,
the transceiver is configured to send a system message to a terminal, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
The embodiment of the invention also provides a network unit, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the program, implements the cell reselection method as described above.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the cell reselection method as described above.
The embodiment of the invention has the following beneficial effects:
in the above scheme, the terminal determines its own motion state, where the motion state includes altitude information and/or speed information, and after determining its own motion state, the terminal determines reselection priorities of different types of cells according to its own motion state, so that the terminal in different motion states can reselect the most suitable cell for camping.
Drawings
Fig. 1 is a flowchart illustrating a cell retransmission method applied to a terminal according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a cell retransmission method applied to a network side device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a terminal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a network-side device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
Embodiments of the present invention provide a cell reselection method, a network device, and a terminal, which enable the terminal to reselect an optimal target cell.
An embodiment of the present invention provides a cell reselection method, which is applied to a terminal, and as shown in fig. 1, the method includes:
step 101: judging the motion state of the terminal, wherein the motion state comprises height information and/or speed information, so that the terminal is distinguished from being located on a high-speed railway, being at medium and low speed, being a flying unmanned aerial vehicle and the like;
step 102: and determining reselection priorities of different types of cells according to the motion states of the cells, so that the situation that the high-speed rail terminal resides in the high-speed rail cell and the unmanned aerial vehicle terminal resides in the unmanned aerial vehicle cell can be ensured.
In this embodiment, the terminal determines a motion state of the terminal, where the motion state includes height information and/or speed information, and after determining the motion state of the terminal, the terminal determines reselection priorities of different types of cells according to the motion state of the terminal, so that the terminal in different motion states can reselect a cell where the terminal is most suitable to camp.
Further, the method further comprises:
receiving a system message issued by a network side device, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
Further, the determining the motion state of the self includes:
and judging the motion speed state of the self according to the threshold value of the Doppler frequency offset.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell with the speed identifier matched with the motion speed state of the cell as the cell with the highest reselection priority.
Further, the threshold includes a first doppler frequency offset threshold and a second doppler frequency offset threshold, the first doppler frequency offset threshold is smaller than the second doppler frequency offset threshold, and the determining the motion speed state according to the doppler frequency offset threshold includes:
calculating the Doppler frequency offset value of the self;
when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
Further, the determining the motion state of the self includes:
and when the received system message of the resident cell carries a flight identifier and the detected neighbor cell is included in the flight neighbor cell list, judging that the resident cell is in a flight state.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell carrying the flight identifier as the cell with the highest reselection priority.
Further, the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
when the cell is in a flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier and the self movement speed state in all the cells carrying the flight identifier, and setting the closest cell as the cell with the highest reselection priority;
when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
An embodiment of the present invention further provides a cell reselection method, which is applied to a network side device, and as shown in fig. 2, the method includes:
step 201: sending a system message to a terminal, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
In this embodiment, the system message sent by the network side device to the terminal carries a parameter for assisting the terminal in determining the motion state, which can help the terminal to determine its own motion state.
In this embodiment, the speed identifier is added to the cell system message sent to the terminal, so that when the terminal performs cell selection, the terminal may adjust the reselection priority of the corresponding cell according to the self moving speed and the speed identifier of the cell system message.
In this embodiment, a new threshold may also be added to the cell system message sent to the terminal: and the Doppler frequency offset threshold is used for comparing the Doppler frequency offset calculated by the terminal with the threshold of the system message so as to determine the moving speed of the terminal.
In this embodiment, a flight identifier may also be added to a cell system message sent to the terminal, so that when the terminal performs cell selection, the terminal may adjust the reselection priority of the corresponding cell according to whether the terminal flies and the flight identifier of the cell system message.
In this embodiment, a new neighbor cell list may also be added to a cell system message sent to the terminal, so that when the terminal finds that the resident cell has a flight identifier and the neighbor cell detected by the terminal is included in the new neighbor cell list, the terminal considers that the terminal belongs to the flight state.
In summary, the terminal may adjust the reselection priorities of different types of cells according to its motion state (including altitude information and speed information).
The cell reselection method of the present invention is further described below with reference to specific embodiments, taking network side equipment as an example, and:
a network side:
1) the base station carries a special identifier of a cell or beam, namely a speed identifier, in a provided system message, where the speed identifier is used to represent that the cell or beam provides a service for a terminal with a corresponding moving speed, and the speed identifier may include a high-speed identifier, a medium-speed identifier, and a low-speed identifier, where the high-speed identifier is used to represent that the cell or beam provides a service for a high-speed user, and so on.
2) The base station carries a special identifier of a cell or beam, namely a flight identifier, in a provided system message, and the flight identifier is used for representing that the cell or beam provides service for a flight terminal (such as an unmanned aerial vehicle).
3) And the base station carries the flying neighbor cell list in the provided system message. The neighbor cell list is used for helping the terminal to judge whether the terminal belongs to a flight state or not and whether the terminal needs to reselect a cell suitable for the unmanned aerial vehicle or not.
4) The base station carries one or more threshold information in the provided system message, and the threshold is a Doppler frequency offset value.
A terminal side:
1-1) the terminal calculates the Doppler frequency offset of the terminal and determines the motion speed state of the terminal according to the threshold of the Doppler frequency offset provided by the base station. For example, the base station issues two doppler frequency offset thresholds fd1 and fd2(fd1< fd2), and when the doppler frequency offset calculated by the terminal is less than fd1, the terminal considers itself to be in a low speed state; if the Doppler frequency offset is between fd1 and fd2, the Doppler frequency offset is considered to belong to a medium-speed state; if the Doppler shift is greater than fd2, the device is considered to be in the high speed state.
1-2) when the terminal identifies its own moving speed, the cell matching its moving speed can be set as the cell with the highest reselection priority. Specifically, the terminal reads a speed identifier in a cell system message, where the speed identifier may represent that the cell provides a service for the terminal in the high speed state or provides a service for the terminal in the medium speed state. When the terminal is in a high-speed state, the cell carrying the high-speed identifier may be set as the cell with the highest reselection priority, and so on.
2-1) when the terminal receives a flight identifier used for representing a cell or beam in a system message of a resident cell and providing service for a flight terminal (unmanned aerial vehicle), and the detected neighbor cell is contained in a flight neighbor cell list provided in the system message of the resident cell, the terminal considers that the terminal belongs to a flight state.
2-2) when the terminal determines that the terminal belongs to the flight state, setting the reselection priority of the cell which contains the flight identifier used for representing the cell or the beam serving the flight terminal (unmanned aerial vehicle) in the system message to be the highest.
3) When the terminal performs motion speed estimation and judges whether the terminal is in a flight state, the reselection priority is set according to the following conditions:
when the terminal belongs to the flight state, selecting the cell with the speed identifier closest to the speed estimation of the terminal as the highest priority from all the cells with the flight identifiers for providing service for the flight terminal (unmanned aerial vehicle), and so on.
When the terminal does not belong to the flight state, selecting a cell with the speed identifier closest to the speed estimation of the terminal as the highest priority from all cells without flight identifiers for providing services for flight terminals (unmanned aerial vehicles), and so on.
Embodiments of the present invention also provide a terminal, as shown in fig. 3, including a processor 31 and a transceiver 32,
the processor 31 is configured to determine a motion state of the processor, where the motion state includes altitude information and/or speed information, and determine reselection priorities of different types of cells according to the motion state of the processor.
In this embodiment, the terminal determines a motion state of the terminal, where the motion state includes height information and/or speed information, and after determining the motion state of the terminal, the terminal determines reselection priorities of different types of cells according to the motion state of the terminal, so that the terminal in different motion states can reselect a cell where the terminal is most suitable to camp.
Further, the transceiver 32 is configured to receive a system message sent by a network side device, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
Further, the processor 31 is specifically configured to determine a motion speed state of the processor according to the threshold value of the doppler frequency offset.
Further, the processor 31 is specifically configured to set a cell whose speed identifier matches with its own moving speed state as a cell with the highest reselection priority.
Further, the threshold values include a first doppler frequency offset threshold value and a second doppler frequency offset threshold value, the first doppler frequency offset threshold value is smaller than the second doppler frequency offset threshold value,
the processor 31 is specifically configured to calculate a doppler frequency offset value of itself; when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
Further, the processor 31 is specifically configured to determine that the processor is in a flight state when the received system message of the cell camping carries a flight identifier and the detected neighboring cell is included in the flying neighboring cell list.
Further, the processor 31 is specifically configured to set the cell carrying the flight identifier as the cell with the highest reselection priority.
Further, the processor 31 is specifically configured to determine a reselection priority of a cell according to a proximity degree of a velocity identifier in all cells carrying a flight identifier to a motion velocity state of the cell when the cell is in a flight state, and set a cell closest to the velocity identifier as a cell with a highest reselection priority; when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
An embodiment of the present invention further provides a network-side device, as shown in fig. 4, including a processor 41 and a transceiver 42,
the transceiver 42 is configured to send a system message to the terminal, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
In this embodiment, the system message sent by the network side device to the terminal carries a parameter for assisting the terminal in determining the motion state, which can help the terminal to determine its own motion state.
The embodiment of the invention also provides a network unit, which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor; the processor, when executing the program, implements the cell reselection method as described above.
The network unit may be a network side device or a terminal.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps in the cell reselection method as described above.
Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
While the foregoing is directed to the preferred embodiment of the present invention, 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 appended claims.
Claims (20)
1. A cell reselection method is applied to a terminal, and comprises the following steps:
judging the motion state of the robot, wherein the motion state comprises height information and/or speed information;
and determining the reselection priorities of the cells of different types according to the motion state of the cells.
2. The cell reselection method of claim 1, wherein the method further comprises:
receiving a system message issued by a network side device, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
3. The cell reselection method of claim 2, wherein the determining the motion state of the cell comprises:
and judging the motion speed state of the self according to the threshold value of the Doppler frequency offset.
4. The cell reselection method of claim 3, wherein the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell with the speed identifier matched with the motion speed state of the cell as the cell with the highest reselection priority.
5. The cell reselection method of claim 3, wherein the threshold includes a first doppler frequency offset threshold and a second doppler frequency offset threshold, the first doppler frequency offset threshold is smaller than the second doppler frequency offset threshold, and the determining the motion speed state according to the doppler frequency offset threshold includes:
calculating the Doppler frequency offset value of the self;
when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
6. The cell reselection method of claim 2, wherein the determining the motion state of the cell comprises:
and when the received system message of the resident cell carries a flight identifier and the detected neighbor cell is included in the flight neighbor cell list, judging that the resident cell is in a flight state.
7. The cell reselection method of claim 6, wherein the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
and setting the cell carrying the flight identifier as the cell with the highest reselection priority.
8. The cell reselection method of claim 2, wherein the determining reselection priorities of different types of cells according to the motion states of the cells comprises:
when the cell is in a flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier and the self movement speed state in all the cells carrying the flight identifier, and setting the closest cell as the cell with the highest reselection priority;
when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
9. A cell reselection method is applied to a network side device, and comprises the following steps:
sending a system message to a terminal, wherein the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
10. A terminal, comprising a processor and a transceiver,
the processor is used for judging the motion state of the processor, the motion state comprises height information and/or speed information, and the reselection priorities of different types of cells are determined according to the motion state of the processor.
11. The terminal of claim 10,
the transceiver is configured to receive a system message issued by a network side device, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
12. The terminal of claim 11, wherein the processor is specifically configured to determine a motion speed status of the terminal according to the threshold value of the doppler frequency offset.
13. The terminal of claim 12, wherein the processor is specifically configured to set a cell with a speed identifier matching with its own motion speed status as a cell with a highest reselection priority.
14. The terminal of claim 12, wherein the threshold values comprise a first Doppler frequency offset threshold value and a second Doppler frequency offset threshold value, wherein the first Doppler frequency offset threshold value is less than the second Doppler frequency offset threshold value,
the processor is specifically configured to calculate a doppler frequency offset value of the processor; when the calculated Doppler frequency offset value is smaller than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value belongs to a low-speed state; when the calculated Doppler frequency offset value is smaller than the second Doppler frequency offset threshold value and larger than the first Doppler frequency offset threshold value, judging that the Doppler frequency offset value is in a medium-speed state; and when the calculated Doppler frequency offset value is larger than the second Doppler frequency offset threshold value, judging that the self is in a high-speed state.
15. The terminal of claim 11, wherein the processor is specifically configured to determine that the terminal is in a flying state when the received system message of the camped cell carries a flying identifier and the detected neighboring cell is included in the flying neighboring cell list.
16. The terminal of claim 15, wherein the processor is specifically configured to set a cell carrying a flight identifier as a cell with a highest reselection priority.
17. The terminal of claim 11,
the processor is specifically configured to determine reselection priorities of the cells according to the closeness of the velocity identifiers in all the cells carrying the flight identifiers and the motion velocity state of the processor when the processor is in the flight state, and set the closest cell as a cell with the highest reselection priority; when the cell is in a non-flight state, determining the reselection priority of the cell according to the proximity degree of the speed identifier in all the cells which do not carry the flight identifier and the motion speed state of the cell, and setting the closest cell as the cell with the highest reselection priority.
18. A network side device, comprising a processor and a transceiver,
the transceiver is configured to send a system message to a terminal, where the system message carries at least one of the following parameters:
the speed identification of the cell or the wave beam is used for identifying that the cell or the wave beam provides service for the user with the corresponding speed;
the flight identification of the cell or the beam is used for identifying that the cell or the beam provides service for the flight terminal;
a flying neighbor list;
threshold value of doppler frequency offset.
19. A network element comprising a memory, a processor and a computer program stored on the memory and executable on the processor; wherein the processor, when executing the program, implements the cell reselection method of any of claims 1-8 or implements the cell reselection method of claim 9.
20. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps in the cell reselection method according to any one of claims 1 to 8 or carries out the steps in the cell reselection method according to claim 9.
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