CN114172612A - Cell search method, cell search device, electronic equipment and computer-readable storage medium - Google Patents
Cell search method, cell search device, electronic equipment and computer-readable storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0079—Acquisition of downlink reference signals, e.g. detection of cell-ID
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The invention discloses a cell searching method, a cell searching device, electronic equipment and a computer readable storage medium, wherein the method comprises the following steps: acquiring the power of any candidate cell; and when the power of any M continuous candidate cells is not greater than the first power threshold, adjusting the first power threshold to be a second power threshold, wherein M is a positive integer, and the second power threshold is smaller than the first power threshold. Therefore, the method can dynamically adjust the access power threshold according to the power measurement result to realize cell self-adaptive search, thereby improving the cell access speed when the signal is strong and the cell access success rate when the signal is weak.
Description
Technical Field
The present invention relates to the field of mobile communications technologies, and in particular, to a cell search method and apparatus, an electronic device, and a computer-readable storage medium.
Background
The cell search refers to a process of acquiring time and frequency synchronization between a UE (User Equipment) and a cell and detecting an Identity Document (ID) of the cell. Currently, the commonly used cell search mainly includes two types: first, a PPA (Power Priority Algorithm) cell search is adopted, that is, when a cell with the strongest Power is searched, access is attempted; second, a cell search using SPA (Speed Priority Algorithm) is performed, that is, when a cell with power greater than a power threshold is searched, an access is attempted.
However, with the PPA scheme, there is a problem that the search speed is slow when the signal is strong; for the SPA scheme, there is a problem in that a cell access success rate is low when a signal is weak.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide a cell search method, which can dynamically adjust an access power threshold according to a power measurement result to implement cell adaptive search, thereby increasing a cell access speed when a signal is strong and a cell access success rate when a signal is weak.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the invention is to propose an electronic device.
A fourth object of the present invention is to provide a cell search apparatus.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a cell search method, including: acquiring the power of any candidate cell; and when the power of any M continuous candidate cells is not greater than the first power threshold, adjusting the first power threshold to be a second power threshold, wherein M is a positive integer, and the second power threshold is smaller than the first power threshold.
According to the cell search method, the power of any candidate cell is obtained, and when the power of M continuous arbitrary candidate cells is not greater than the first power threshold, the first power threshold is adjusted to be the second power threshold. Therefore, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
According to an embodiment of the invention, the method further comprises: and when the power of any candidate cell is greater than the first power threshold value, carrying out cell access.
According to an embodiment of the invention, the method further comprises: and when the number of the acquired candidate cells with the power larger than the first power threshold reaches a first value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the first power threshold, and performing cell access.
According to an embodiment of the invention, the method further comprises: and when the cell access fails, keeping the first power threshold unchanged.
According to an embodiment of the invention, after adjusting the first power threshold to the second power threshold, the method further comprises: acquiring the power of any other candidate cell; and when the power of any N continuous candidate cells is not greater than the second power threshold, adjusting the second power threshold to be a third power threshold, wherein N is a positive integer greater than M, and the third power threshold is smaller than the second power threshold.
According to an embodiment of the invention, the method further comprises: and when the acquired power of the candidate cell is greater than a second power threshold value, carrying out cell access.
According to an embodiment of the invention, the method further comprises: and when the number of the acquired candidate cells with the power larger than the second power threshold reaches a second value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the second power threshold, and performing cell access.
According to an embodiment of the invention, the method further comprises: and keeping the second power threshold unchanged when the cell access fails.
According to an embodiment of the invention, the method further comprises: and when the acquired power of the candidate cell is not more than the third power threshold, delaying the first time threshold, and then acquiring the power of any candidate cell again.
To achieve the above object, a second embodiment of the present invention provides a computer-readable storage medium, on which a cell search program is stored, and the cell search program, when executed by a processor, implements the cell search method of the first embodiment.
According to the computer-readable storage medium of the embodiment of the invention, by the cell search method, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
In order to achieve the above object, a third embodiment of the present invention provides an electronic device, which includes a memory, a processor, and a cell search program stored in the memory and executable on the processor, where the processor implements the cell search method of the first embodiment when executing the cell search program.
According to the electronic equipment provided by the embodiment of the invention, by the cell searching method, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive searching is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
In order to achieve the above object, a fourth aspect of the present invention provides a cell search apparatus, including: an obtaining module, configured to obtain power of any candidate cell; the determining module is configured to adjust the first power threshold to a second power threshold when the powers of M consecutive arbitrary candidate cells are not greater than the first power threshold, where M is a positive integer, and the second power threshold is smaller than the first power threshold.
According to the cell search device of the embodiment of the invention, the acquisition module acquires the power of any candidate cell, and the determination module adjusts the first power threshold to the second power threshold when the power of any M continuous candidate cells is not greater than the first power threshold. Therefore, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
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Fig. 1 is a flowchart illustrating a cell search method according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a cell search method according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cell search method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The cell search refers to a process of acquiring time and frequency synchronization between the UE and the cell and detecting the cell ID. Cell search is a very critical step in a mobile communication system, and is also the first step for a terminal to establish a communication link with a network side. In the application of the mobile communication system, after the terminal is powered on, it needs to search a suitable cell (for example, the cell with the strongest power) as soon as possible, and then achieve time and frequency synchronization with the cell to acquire the detailed information of the cell, and the terminal can use the service of the network after logging in the cell to perform subsequent system information reading and data transmission.
Currently, the commonly used cell search mainly includes two types: first, cell search using PPA, i.e. attempting access when searching for the strongest cell; second, cell search using SPA, i.e. attempting access when a cell with a power greater than a power threshold is searched. For the PPA scheme, no matter whether the signal is good or bad, the time consumption of the whole process is close, power measurement of a predetermined number of times and one-time access attempt are required, and for the case that the signal is strong, the power measurement of the predetermined number of times causes unnecessary time waste, so that the cell search speed is slow, namely the PPA scheme has poor performance in the aspect of search time under a strong signal scene; for the SPA scheme, when the power threshold is set unreasonably, for example, when the power threshold is set high, the speed of searching potential frequency points becomes slow, and when the signal is weak, a cell with proper power cannot be searched all the time, which results in repeated power measurement; when the power threshold is set to be low, the cell access success rate when the signal is weak can be reduced, that is, the access success rate of the SPA scheme is not good under a weak signal scene. Based on the above, the present application provides a cell search method, which can dynamically adjust an access power threshold according to a power measurement result, and implement cell adaptive search, so as to improve a cell access speed when a signal is strong and an access success rate when the signal is weak.
Fig. 1 is a flowchart of a cell search method according to an embodiment of the present invention. As shown in fig. 1, the cell search method may include the steps of:
step S101, acquiring power of any candidate cell.
Specifically, the cell search method of the present application may be applied to a user terminal, such as a mobile phone, a tablet computer, a wearable device, and the like. During cell search, the user terminal may scan any candidate cell according to a PLMN (Public Land Mobile Network) selection criterion and the like, obtain and record a power measurement result, where the power measurement result is power of any candidate cell obtained by scanning.
Step S102, when the powers of the continuous M arbitrary candidate cells are not greater than the first power threshold, the first power threshold is adjusted to be a second power threshold, M is a positive integer, and the second power threshold is smaller than the first power threshold.
It should be noted that, before the cell search is performed, an initial power threshold may be determined based on empirical data, where the initial power threshold is a power threshold that can be empirically guaranteed to search for a candidate cell, and in a specific example, the initial power threshold may be set to-110 dBm.
When searching for a cell, the initial power threshold value is used as a first power threshold value, then the acquired power of any candidate cell is compared with the first power threshold value (such as-110 dBm), if the power of the candidate cell is not greater than the first power threshold value, the candidate cell and the corresponding candidate cell power value are recorded, then any candidate cell is continuously scanned, if the power of the candidate cell is not greater than the first power threshold value, the candidate cell and the corresponding candidate cell power value are recorded, and the process is circulated until the power of M (such as 3) arbitrary candidate cells is not greater than the first power threshold value, which indicates that the power measurement result of the current candidate cell is poor, namely the signal of the current candidate cell is weak, at this time, the first power threshold value is adjusted to a second power threshold value, wherein the second power threshold value is less than the first power threshold value, such as the second power threshold may be set to-120 dBm.
In some embodiments, the cell search method further includes: and when the power of any candidate cell is greater than the first power threshold value, carrying out cell access.
Further, when the cell access fails, the first power threshold is kept unchanged.
Specifically, when the power of any candidate cell is large enough, that is, when the signal is strong enough, the set first power threshold is a power threshold that can guarantee successful access of the cell without selecting the largest power cell, when any candidate cell with the power larger than the first power threshold is obtained, cell access is attempted through a device such as a mobile terminal, if the selected candidate cell can be accessed once, the cell access speed when the signal is strong is increased, if access fails, the first power threshold is guaranteed to be unchanged, new any candidate cell with the power larger than the first power threshold is continuously obtained, access is attempted, and the process is repeated until the candidate cell is successfully accessed.
In some embodiments, the cell search method further includes: and when the number of the acquired candidate cells with the power larger than the first power threshold reaches a first value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the first power threshold, and performing cell access.
Specifically, when the power of any candidate cell is large, that is, a signal is strong, before the powers of M (e.g., 3) any candidate cells are all continuously greater than a first power threshold, if the power of the candidate cell is greater than the first power threshold, recording the powers of the candidate cell and the corresponding candidate cell, and when the number of the recorded acquired candidate cells reaches a first value, acquiring a candidate cell with the maximum power from the candidate cells with the acquired power greater than the first power threshold as an access point and attempting to access, and if the access is successful, ending the cell search; if the access fails, keeping the first power threshold unchanged, re-acquiring the power of any new candidate cell, and acquiring the candidate cell with the maximum power from the candidate cells with the acquired power greater than the first power threshold to try to access when the number of the acquired candidate cells with the power greater than the first power threshold reaches a preset first value, and repeating the steps until the candidate cells are successfully accessed.
It should be noted that, in the scanning process, when the number of the acquired candidate cells whose power is greater than the first power threshold reaches the first value, it indicates that the power measurement result of the current candidate cell is better, that is, the signal is stronger, and at this time, cell selection is performed and cell access is attempted, so that the cell access speed when the signal is stronger can be increased.
Therefore, the method can dynamically adjust the access power threshold according to the power measurement result, and realize cell self-adaptive search so as to improve the cell access speed when the signal is strong and the access success rate when the signal is weak.
In some embodiments, after adjusting the first power threshold to the second power threshold, the cell search method further includes: acquiring the power of any other candidate cell; and when the power of any N continuous candidate cells is not greater than the second power threshold, adjusting the second power threshold to be a third power threshold, wherein N is a positive integer greater than M, and the third power threshold is smaller than the second power threshold.
Specifically, after adjusting the first power threshold to the second power threshold, in a specific example, the second power threshold is set to-120 dBm. When the cell search is carried out, scanning any other candidate cell to obtain and record a power measurement result, wherein the power measurement result is the power of the any other candidate cell obtained by scanning; the acquired power of any candidate cell is then compared to a second power threshold (e.g. -120dBm), if the power of the candidate cell is not larger than the second power threshold, recording the candidate cell and the corresponding power value of the candidate cell, then continuing to scan any candidate cell, if the power of the candidate cell is still not greater than the second power threshold, the candidate cell and the corresponding candidate cell power value are recorded, and the process is repeated until the power of any of N (e.g. 5) candidate cells is not greater than the second power threshold, which indicates that the power measurement result of the current candidate cell is poor, i.e., the current candidate cell signal is weak, the second power threshold is adjusted to the third power threshold, wherein the third power threshold is less than the second power threshold, for example, the third power threshold may be set to-130 dBm.
It should be noted that, when the third power threshold is used as the determination condition and a candidate cell larger than the third power threshold still cannot be quickly searched, it indicates that the third power threshold is still inappropriate (too large), and the third power threshold may be adjusted, for example, the third power threshold is reduced from-130 dBm to-140 dBm to reduce the difficulty of cell signal search, and if the power threshold (-140dBm) is still not satisfied, the third power threshold may be sequentially adjusted to-150 dBm to-160 dBm, etc. to improve the access success rate when the power of the candidate cell is smaller.
In some embodiments, the cell search method further includes: and when the acquired power of the candidate cell is greater than the second power threshold, performing cell access.
Further, when the cell access fails, the second power threshold is kept unchanged.
Specifically, after the first power threshold is adjusted to the second power threshold, when the power of any candidate cell is sufficiently large relative to the adjusted second power threshold, that is, when the signal is sufficiently strong relative to the second power threshold, the adjusted second power threshold is a power threshold that can ensure successful access of the cell without selecting the cell with the largest power, when the power of the acquired candidate cell is greater than the second power threshold, the cell access is attempted through a device such as a mobile terminal, if the selected candidate cell can be accessed once, the cell access speed at the time of the stronger signal is increased, if the access fails, it is ensured that the first power threshold is unchanged, a new candidate cell with the largest power is continuously acquired from the acquired candidate cells, and the access is attempted, and the above-mentioned steps are repeated until the candidate cell is successfully accessed.
It should be noted that the acquired candidate cells include all the candidate cell powers acquired when the first power threshold is taken as the determination condition and any other candidate cell powers acquired when the second power threshold is taken as the determination condition, that is, all the candidate cell powers acquired when the first power threshold is taken as the determination condition and any other candidate cell powers acquired when the second power threshold is taken as the determination condition are both compared with the second power threshold, and a candidate cell larger than the second power threshold is selected as the access cell to attempt access.
In some embodiments, the cell search method further includes: and when the number of the acquired candidate cells with the power larger than the second power threshold reaches a second value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the second power threshold, and performing cell access.
Specifically, after the first power threshold is adjusted to the second power threshold, the power of any candidate cell is larger than the adjusted second power threshold, that is, when the signal is stronger than the second power threshold, before the powers of N (e.g., 5) arbitrary candidate cells continuously appear, none of which is larger than the second power threshold, if the power of the candidate cell is larger than the second power threshold in the acquired candidate cells, the power of the candidate cell and the corresponding candidate cell is recorded, and when the number of the acquired candidate cells reaches a preset second value, the candidate cell with the largest power is acquired from the candidate cells whose acquired powers are larger than the second power threshold as an access point and tries to access, and if the access is successful, the cell search is ended; and if the access fails, keeping the second power threshold unchanged, re-acquiring the power of any new candidate cell, and acquiring the candidate cell with the maximum power from the candidate cells with the acquired power greater than the second power threshold to try to access when the number of the acquired candidate cells with the power greater than the second power threshold reaches a second value, and repeating the steps until the candidate cells are successfully accessed.
It should be noted that the acquired candidate cells include all the candidate cell powers acquired when the first power threshold is used as the determination condition and any other candidate cell powers acquired when the second power threshold is used as the determination condition, that is, before all powers of N (for example, 5) arbitrary candidate cells continuously appear and are not greater than the second power threshold, all the candidate cell powers acquired when the first power threshold is used as the determination condition and any other candidate cell powers acquired when the second power threshold is used as the determination condition are compared with the second power threshold, and a candidate cell greater than the second power threshold is selected from the candidate cell powers, and the candidate cell powers and the corresponding candidate cell powers are recorded.
In some embodiments, the cell search method further includes: and when the acquired power of the candidate cell is not more than the third power threshold, delaying the first time threshold, and then acquiring the power of any candidate cell again.
Specifically, when the third power threshold is used as the determination condition, and when the acquired power of the candidate cell is not greater than the third power threshold, it indicates that the signal of the candidate cell at the current location is very weak, and may wait for a preset time directly before restarting a new round of attempts, i.e., acquiring the power of any candidate cell, because the ue may move to an area with a strong signal as time passes.
As a specific example, referring to fig. 2, the cell search method may include the following steps:
step S201, scanning any candidate cell, that is, when searching for a cell, the mobile terminal scans any candidate cell, so as to perform subsequent operations such as system information reading and data transmission.
Step S202, obtaining the power of any candidate cell, that is, obtaining and recording the power measurement result of any candidate cell.
Step S203, determine whether the candidate cell power is greater than the first power threshold. If yes, executing step S204; otherwise, step S208 is performed. That is, the candidate cell power obtained in each scan is compared with the first power threshold, and if the candidate cell power threshold is greater than the first power threshold, step S204 is executed; otherwise, step S208 is performed.
Step S204, recording the power of the candidate cell, recording the number n of the cells with the power of the candidate cell larger than a first power threshold value through a counter, wherein the initial value of n is 0, and assigning: and n is n +1, namely when the power of the candidate cell is greater than the first power threshold, recording the power of the candidate cell, and counting the number of the cells with the power of the candidate cell greater than the first power threshold.
In step S205, it is determined whether n reaches the first value. If yes, go to step S206; otherwise, return to step S201. Recording the number of the candidate cells with the power larger than the first power threshold, and executing step S206 if the number of the candidate cells with the power larger than the first power threshold reaches a preset first value; otherwise, returning to step S201, scanning any candidate cell again until the counted number of cells with the candidate cell power greater than the first power threshold reaches the first value.
Step S206, selecting the maximum power value from the candidate cells with the acquired power greater than the first power threshold for attempting access, that is, comparing the powers of the candidate cells with the acquired power greater than the first power threshold, acquiring the cell with the maximum power as the access point, and attempting access.
Step S207, determine whether the access is successful. If yes, ending the operation, and indicating that the cell search is successful; otherwise, returning to step S201, the scanning is performed again on any candidate cell.
Step S208, whether the continuous M times are not more than the first power threshold value. If so, go to step S209; otherwise, return to step S201. That is, when M times of continuous occurrences of the candidate cell power not greater than the first power threshold, it indicates that the setting of the first power threshold at this time is not reasonable, and needs to be adjusted, and step S209 is executed, otherwise, the step S201 is returned to, that is, the first power threshold is continuously used as the determination condition.
In step S209, the first power threshold is adjusted to a second power threshold, that is, the second power threshold is used as a determination condition for cell search in the next operation, and the second power threshold needs to be smaller than the first power threshold.
In step S210, any other candidate cell is scanned, that is, in the cell search, any other candidate cell is continuously scanned.
In step S211, the powers of all the recorded candidate cells are obtained, that is, the powers of all the candidate cells obtained when the first power threshold is used as the determination condition and the powers of any other candidate cells obtained when the second power threshold is used as the determination condition are obtained.
In step S212, it is determined whether the candidate cell power is greater than the second power threshold. If so, go to step S213; otherwise, step S217 is performed. Comparing the powers of all candidate cells obtained when the first power threshold is used as a judgment condition and the powers of any other candidate cells obtained when the second power threshold is used as a judgment condition with the second power threshold, and executing the step S213 if the power of the candidate cells is greater than the second power threshold; otherwise, step S217 is performed.
Step S213, recording the power of the candidate cell, recording the number m of the cells with the power of the candidate cell larger than a second power threshold value through a counter, wherein the initial value of m is 0, and assigning: and m is m +1, namely when the power of the candidate cell is greater than the second power threshold, recording the power of the candidate cell, and counting the number of the cells with the power of the candidate cell greater than the second power threshold.
In step S214, it is determined whether m reaches the second value. If so, step S215 is performed, otherwise, step S210 is returned to. That is, the number of cells with the candidate cell power greater than the second power threshold is recorded, if the number of cells with the candidate cell power greater than the second power threshold reaches the preset second value, step S215 is executed, otherwise, step S210 is returned to.
Step S215, selecting the maximum power value from the candidate cells with the acquired power greater than the second power threshold for attempting access, that is, comparing the powers of the candidate cells with the acquired power greater than the second power threshold, acquiring the cell with the maximum power as the access point, and attempting access.
Step S216, judge whether the access is successful. If yes, ending the operation, and indicating that the cell search is successful; otherwise, returning to step S210, another optional candidate cell is scanned again.
Step S217, whether the N consecutive times are not greater than the second power threshold. If yes, go to step S218; otherwise, return to step S210. That is, when the power of the candidate cell is not greater than the second power threshold for N times, it indicates that the setting of the second power threshold is not reasonable, and needs to be adjusted, and step S218 is executed, otherwise, the process returns to step S201, i.e., the second power threshold is continuously used as the determination condition.
In step S218, the second power threshold is adjusted to a third power threshold, that is, the third power threshold is used as a determination condition for cell search in the next operation, and the third power threshold needs to be smaller than the second power threshold.
In step S219, any other candidate cell is scanned, that is, in the cell search, any other candidate cell is continuously scanned.
In step S220, the powers of all the recorded candidate cells are obtained, that is, the powers of all the candidate cells obtained when the first power threshold and the second power threshold are used as the determination conditions and the powers of any other candidate cells obtained when the second power threshold is used as the determination conditions are obtained.
Step S221, determining whether the candidate cell power is greater than a third power threshold. If yes, go to step S222; otherwise, step S226 is executed. Comparing the powers of all candidate cells obtained when the first power threshold and the second power threshold are used as judgment conditions and the powers of any other candidate cells obtained when the third power threshold is used as a judgment condition with the third power threshold, and executing the step S222 if the power of the candidate cells is greater than the third power threshold; otherwise, step S226 is executed.
Step S222, recording the power of the candidate cell, recording the number k of the cells with the power of the candidate cell larger than a second power threshold value through a counter, wherein the initial value of k is 0, and assigning: and k is k +1, namely when the power of the candidate cell is greater than the third power threshold, recording the power of the candidate cell, and counting the number of the cells with the power of the candidate cell greater than the third power threshold.
In step S223, it is determined whether k reaches the third value. If so, step S224 is performed, otherwise, step S219 is returned to. That is, the number of cells with the candidate cell power greater than the third power threshold is recorded, if the number of cells with the candidate cell power greater than the third power threshold reaches the preset third value, step S224 is executed, otherwise, step S219 is returned to.
Step S224, selecting the maximum power value from the candidate cells with the acquired power greater than the third power threshold for attempting access, that is, comparing the powers of the candidate cells with the acquired power greater than the third power threshold, acquiring the cell with the maximum power as the access point, and attempting access.
Step S225, determine whether the access is successful. If yes, ending the operation, and indicating that the cell search is successful; otherwise, returning to step S219, another arbitrary candidate cell is scanned again.
In step S226, whether the acquired power of the candidate cell is not greater than the third power threshold. If yes, returning to the step S201, waiting for a period of time and restarting a new round of attempt; otherwise, it returns to step S219. That is, when a suitable cell is not searched using the third power threshold as a determination condition, a new round of attempt is restarted after waiting for a while, because the ue may move to a strong signal area with the passage of time.
It should be noted that, along with the movement of the ue, the ue may move from an area with a poor signal to an area with a strong signal, and an over-search phenomenon may also occur after the first power threshold is adjusted to the second power threshold, and at this time, the second power threshold may be adjusted to the first power threshold again, so as to improve the cell access speed when the signal is strong.
In summary, according to the cell search method of the embodiment of the present invention, the power of any candidate cell is obtained, and when the powers of M consecutive arbitrary candidate cells are not greater than the first power threshold, the first power threshold is adjusted to the second power threshold. Therefore, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
Embodiments of the present invention also provide a computer-readable storage medium having stored thereon a cell search program, which when executed by a processor, implements a cell search method as described above.
According to the computer-readable storage medium of the embodiment of the invention, by the cell search method, the access power threshold is dynamically adjusted according to the power measurement result, and the cell adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
An embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a cell search program stored in the memory and executable on the processor, and when the processor executes the cell search program, the cell search method as described above is implemented.
According to the electronic equipment provided by the embodiment of the invention, by the cell searching method, the access power threshold is dynamically adjusted according to the power measurement result, and the cell self-adaptive searching is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
Fig. 3 is a schematic structural diagram of a cell search apparatus according to an embodiment of the present invention. As shown in fig. 3, the cell search apparatus 100 includes: an acquisition module 110 and a determination module 120.
The obtaining module 110 is configured to obtain power of any candidate cell; the determining module 120 is configured to adjust the first power threshold to a second power threshold when the powers of M consecutive arbitrary candidate cells are not greater than the first power threshold, where M is a positive integer and the second power threshold is smaller than the first power threshold.
In some embodiments, the determining module 120 is further specifically configured to: and when the power of any candidate cell is greater than the first power threshold value, carrying out cell access.
In some embodiments, the determining module 120 is further specifically configured to: and when the number of the acquired candidate cells with the power larger than the first power threshold reaches a first value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the first power threshold, and performing cell access.
In some embodiments, the determining module 120 is further specifically configured to: and when the cell access fails, keeping the first power threshold unchanged.
In some embodiments, after adjusting the first power threshold to the second power threshold, the obtaining module 110 is further configured to obtain the power of any other candidate cell: the determining module 120 is further configured to adjust the second power threshold to a third power threshold when the powers of N consecutive arbitrary candidate cells are not greater than the second power threshold, where N is a positive integer greater than M, and the third power threshold is smaller than the second power threshold.
In some embodiments, the determining module 120 is further specifically configured to: and acquiring the candidate cell with the maximum power from the acquired candidate cells, and performing cell access.
In some embodiments, the determining module 120 is further specifically configured to: and when the number of the acquired candidate cells with the power larger than the second power threshold reaches a second value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the second power threshold, and performing cell access.
In some embodiments, the determining module 120 is further specifically configured to: and keeping the second power threshold unchanged when the cell access fails.
In some embodiments, the determining module 120 is further specifically configured to: and when the acquired power of the candidate cell is not more than the third power threshold, delaying the first time threshold, and then acquiring the power of any candidate cell again.
It should be noted that, for the description of the cell search apparatus in the present application, please refer to the description of the cell search method in the present application, which is not repeated herein.
According to the cell search device of the embodiment of the invention, the acquisition module acquires the power of any candidate cell, and the determination module adjusts the first power threshold to be the second power threshold when the powers of the continuous M arbitrary candidate cells are not greater than the first power threshold. Therefore, the access power threshold can be dynamically adjusted according to the power measurement result, and the cell self-adaptive search is realized, so that the cell access speed when the signal is strong and the cell access success rate when the signal is weak are improved.
It should be noted that the present application may be applied to communication systems such as 4G LTE (Long Term Evolution), 5G NR (New Radio interface), and the like, and is not limited herein.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. A method of cell search, the method comprising:
acquiring the power of any candidate cell;
when the power of any M continuous candidate cells is not greater than a first power threshold, adjusting the first power threshold to be a second power threshold, wherein M is a positive integer, and the second power threshold is smaller than the first power threshold.
2. The cell search method of claim 1, further comprising:
and when the power of any candidate cell is greater than the first power threshold value, carrying out cell access.
3. The cell search method of claim 1, further comprising:
and when the number of the acquired candidate cells with the power larger than the first power threshold reaches a first value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the first power threshold, and performing cell access.
4. The cell search method of claim 2 or 3, wherein the method further comprises:
and when the cell access fails, keeping the first power threshold unchanged.
5. The cell search method of claim 1, wherein after adjusting the first power threshold to a second power threshold, the method further comprises:
acquiring the power of any other candidate cell;
when the power of any N continuous candidate cells is not greater than a second power threshold, adjusting the second power threshold to a third power threshold, wherein N is a positive integer greater than M, and the third power threshold is smaller than the second power threshold.
6. The cell search method of claim 5, further comprising:
and when the acquired power of the candidate cell is greater than the second power threshold, performing cell access.
7. The cell search method of claim 5, further comprising:
and when the number of the acquired candidate cells with the power larger than the second power threshold reaches a second value, acquiring the candidate cell with the maximum power from the candidate cells with the acquired power larger than the second power threshold, and performing cell access.
8. The cell search method according to claim 6 or 7, wherein the method further comprises:
and when the cell access fails, keeping the second power threshold unchanged.
9. The cell search method of claim 5, further comprising:
and when the acquired power of the candidate cell is not more than the third power threshold, delaying the first time threshold, and then acquiring the power of any candidate cell again.
10. A computer-readable storage medium, having stored thereon a cell search program which, when executed by a processor, implements a cell search method according to any one of claims 1-9.
11. An electronic device comprising a memory, a processor, and a cell search program stored on the memory and executable on the processor, the processor implementing the cell search method according to any one of claims 1-9 when executing the cell search program.
12. A cell search apparatus, comprising:
an obtaining module, configured to obtain power of any candidate cell;
the determining module is configured to, when the powers of M consecutive arbitrary candidate cells are not greater than a first power threshold, adjust the first power threshold to a second power threshold, where M is a positive integer, and the second power threshold is smaller than the first power threshold.
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