CN112020107B - Method and device for optimizing pilot frequency switching start-up threshold and computing equipment - Google Patents
Method and device for optimizing pilot frequency switching start-up threshold and computing equipment Download PDFInfo
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- CN112020107B CN112020107B CN201910459067.4A CN201910459067A CN112020107B CN 112020107 B CN112020107 B CN 112020107B CN 201910459067 A CN201910459067 A CN 201910459067A CN 112020107 B CN112020107 B CN 112020107B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
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- 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
- H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- 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
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Abstract
The invention discloses a method, a device and a computing device for optimizing a pilot frequency switching start threshold, wherein the method comprises the following steps: dividing a plurality of level intervals; aiming at a given cell, acquiring the frequency of pilot frequency switching of the cell in a base station in each level interval in a first time period, and calculating the pilot frequency switching efficiency of each level interval; and adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval. Therefore, according to the scheme of the invention, the pilot frequency switching efficiency of the level interval reflects the concentrated situation of the pilot frequency switching in the level interval, and the start-up threshold of the pilot frequency switching is adjusted according to the pilot frequency switching efficiency, so that a user can effectively enter the pilot frequency measurement process, and the reduction of the user speed transmission efficiency caused by the early start of the pilot frequency start-up is avoided.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a pilot frequency switching start-up threshold optimization method, a pilot frequency switching start-up threshold optimization device and computing equipment.
Background
In the LTE pilot frequency switching process based on coverage, after meeting A2, reporting an A2 measurement report, issuing pilot frequency measurement configuration A5 and terminating pilot frequency measurement configuration A1 by a base station side, starting the pilot frequency measurement by a terminal according to the pilot frequency measurement configuration, and judging to report an A5 report to initiate a switching process when meeting an A5 event. When the UE is in a connected state and the signal quality of the serving cell is lower than a certain threshold, a User Equipment (User Equipment, UE for short) reports an event a2 measurement report that triggers inter-frequency measurement, and an eNodeB (Evolved Node B) issues an inter-frequency handover measurement related event configuration. Fig. 1a shows a schematic diagram of determining a start-up measurement threshold, and as shown in fig. 1a, when the sum of the primary serving cell level (Ms) and the handover hysteresis (Hys) is lower than the a2 threshold (Thresh), the ue reports a trigger inter-frequency measurement event a 2. When the user equipment enters a pilot frequency measurement stage (i.e. after the user receives the pilot frequency measurement configuration), the user equipment periodically measures the pilot frequency, if the pilot frequency switching execution A5 threshold is met (the target frequency point is greater than the threshold value), an A5 measurement report is reported, and then a pilot frequency switching process is initiated. Fig. 1b shows a schematic diagram of determining an inter-frequency handover threshold, as shown in fig. 1b, under the condition that the event of triggering a2 in fig. 1a is satisfied (Ms + Hys is lower than Thresh1 of the a2 threshold), if a difference between a sum of an inter-frequency neighbor cell level (Mn), a frequency offset (Ofn) of the inter-frequency neighbor cell, and a cell offset (Ocn) of the inter-frequency neighbor cell, and a handover hysteresis (Hys) is higher than a5 threshold (Thresh2), an a5 measurement report is reported.
The existing network inter-frequency switching A2 start-up threshold (Thresh in fig. 1a or Thresh1 in fig. 1 b) is set according to a recommended value, newly-built sites are subjected to single test, capacity expansion single test, indoor and outdoor collaborative optimization, and user complaints are personalized modification, but personalized setting is also a test experience value, and the A2 start-up threshold is set only according to the experience value, so that unreasonable threshold setting is easily caused. As shown in fig. 1b, setting too high a2 start-up thresholds (a2 Thresh1 and a2 Thresh2) may cause the ue to easily meet the thresholds, resulting in long-time inter-frequency measurement, and during the 6ms (GAP1 measurement mode: 6ms is used for inter-frequency measurement every 40 ms) period of the inter-frequency measurement GAP, the ue cannot perform radio high-speed data transmission, which affects the user data transmission efficiency by about 20%.
Disclosure of Invention
In view of the above, the present invention is proposed to provide an optimization method, apparatus and computing device for inter-frequency handover initiation threshold, which overcome the above problems or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a method for optimizing a pilot frequency handover start threshold, comprising:
dividing a plurality of level intervals;
aiming at a given cell, acquiring the frequency of pilot frequency switching of the cell in a base station in each level interval in a first time period, and calculating the pilot frequency switching efficiency of each level interval;
and adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval.
Optionally, the calculating the inter-frequency handover efficiency of each level interval further includes:
and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval.
Optionally, the adjusting the start-up threshold for inter-frequency handover according to the inter-frequency handover efficiency of each level interval further includes:
and judging whether a first level interval with the pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the first level interval.
Optionally, the adjusting the start-up threshold for inter-frequency handover according to the inter-frequency handover efficiency of each level interval further includes:
if the first level interval does not exist, judging whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to a second efficiency threshold value exist, and if the two continuous second level intervals exist, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the two continuous second level intervals; and the second efficiency threshold value is greater than the first efficiency threshold value.
Optionally, the adjusting the pilot frequency switching start threshold according to the pilot frequency switching efficiency of each level interval further includes:
if two continuous second level intervals do not exist, judging whether three continuous third level intervals exist, wherein the sum of the pilot frequency switching efficiency exceeds or equals to a third efficiency threshold value, and if three continuous third level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the three continuous third level intervals.
Optionally, after the adjusting the start-up threshold of the inter-frequency handover according to the inter-frequency handover efficiency of each level interval, the method further includes:
replacing the original starting threshold by the adjusted starting threshold;
monitoring the different frequency switching-out untimely proportion of the cell in a second time period, and judging whether the different frequency switching-out untimely proportion exceeds a untimely threshold value; if so, lifting the adjusted starting threshold according to a preset step length; wherein the second time period is less than the first time period.
Optionally, the pilot frequency out-of-time proportion is calculated by the following steps:
and solving the sum of the times of the cell different frequency switching failure and the times of the terminal desynchronizing reconstruction to other cells in the cell, and calculating the ratio of the sum of the times to the times of the cell different frequency switching request to obtain the different frequency switching untimely proportion.
According to another aspect of the present invention, an apparatus for optimizing a threshold for inter-frequency handover initiation is provided, which includes:
the dividing module is suitable for dividing a plurality of level intervals;
the switching efficiency calculation module is suitable for acquiring the frequency of pilot frequency switching of a cell in a base station in each level interval in a first time period aiming at a given cell and calculating the pilot frequency switching efficiency of each level interval;
and the adjusting module is suitable for adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval.
Optionally, the handover efficiency calculating module is further adapted to:
and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval.
Optionally, the adjusting module is further adapted to:
and judging whether a first level interval with the pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the first level interval.
Optionally, the adjusting module is further adapted to:
if the first level interval does not exist, judging whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to a second efficiency threshold value exist, and if the two continuous second level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the two continuous second level intervals; wherein the second efficiency threshold is greater than the first efficiency threshold.
Optionally, the adjusting module is further adapted to:
if two continuous second level intervals do not exist, judging whether three continuous third level intervals exist, wherein the sum of the pilot frequency switching efficiency exceeds or equals to a third efficiency threshold value, and if three continuous third level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the three continuous third level intervals.
Optionally, the apparatus further comprises: a correction module adapted to: replacing the original starting threshold by the adjusted starting threshold; monitoring the different frequency switching-out untimely proportion of the cell in a second time period, and judging whether the different frequency switching-out untimely proportion exceeds a untimely threshold value; if so, lifting the adjusted starting threshold according to a preset step length; wherein the second time period is less than the first time period.
Optionally, the modification module is further adapted to:
and solving the sum of the times of the cell different frequency switching failure and the times of the terminal desynchronizing reconstruction to other cells in the cell, and calculating the ratio of the sum of the times to the times of the cell different frequency switching request to obtain the different frequency switching untimely proportion.
According to yet another aspect of the present invention, there is provided a computing device comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the pilot frequency switching start-up threshold optimization method.
According to another aspect of the present invention, a computer storage medium is provided, where at least one executable instruction is stored in the storage medium, and the executable instruction causes a processor to perform operations corresponding to the above method for optimizing a inter-frequency handover start-up threshold.
According to the pilot frequency switching start-up threshold optimization method, device and computing equipment, aiming at a given cell, optimization adjustment is performed on the start-up threshold of the cell once every first time period according to big data so as to reduce the start-up threshold to a proper value; the pilot frequency switching efficiency of each level interval is adjusted, so that the process of adjusting the start-up threshold has support of big data, and the result is more reliable; and aiming at a given cell, by utilizing the optimization scheme, the individualized starting and measuring threshold corresponding to the cell can be adjusted and obtained, and the starting and measuring threshold which is uniformly set according to an empirical value is not needed, so that the adjustment result has higher pertinence, and the actual switching condition of the given cell is better met. Therefore, by utilizing the scheme of the invention, the starting threshold is corrected, so that the user equipment can enter the pilot frequency measurement process more effectively instead of starting pilot frequency starting too early, and the user perception is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1a is a schematic diagram illustrating the determination of a threshold;
fig. 1b shows a schematic diagram of the judgment of the inter-frequency handover threshold;
FIG. 2 is a flowchart illustrating a method for optimizing a pilot frequency handover initiation threshold according to an embodiment of the present invention;
FIG. 3 is a flowchart of a method for optimizing a pilot frequency handover initiation threshold according to another embodiment of the present invention;
FIG. 4 is a diagram illustrating a divided level interval and the number of inter-frequency handovers in an embodiment;
fig. 5 shows a diagram of inter-frequency handover efficiency for each level interval of fig. 4;
fig. 6 is a flowchart illustrating a method for optimizing a inter-frequency handover start threshold according to an embodiment of the present invention;
fig. 7 shows a functional block diagram of an apparatus for optimizing a inter-frequency handover initiation threshold according to an embodiment of the present invention;
FIG. 8 illustrates a schematic structural diagram of a computing device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 2 is a flowchart illustrating a method for optimizing a inter-frequency handover initiation threshold according to an embodiment of the present invention. The embodiment mainly corrects the situation that the start-up threshold is set too high. As shown in fig. 2, the method includes:
in step S201, a plurality of level sections are divided.
The plurality of level intervals can divide the whole level range according to a specific level interval so as to enable the divided plurality of level intervals to cover the whole level range; or, the division may be performed according to a start-up threshold of the existing inter-frequency handover in a given cell, where the start-up threshold refers to a threshold that triggers the inter-frequency measurement event a2, and the start-up threshold may be a threshold set according to an empirical value, or a threshold adjusted by using the scheme of the present invention.
Step S202, aiming at a given cell, acquiring the frequency of the cell in the base station for carrying out pilot frequency switching in each level interval in a first time period, and calculating the pilot frequency switching efficiency in each level interval.
The given cell may be any cell having different frequency points with the neighboring cells. The scheme of the invention can adjust the start-up threshold individually aiming at a single given cell and obtain a better start-up threshold.
The method comprises the steps of executing big data acquisition and starting measurement threshold adjustment according to a first preset time period, and periodically correcting the starting measurement threshold of the different-frequency switching of a given cell.
The a5 measurement report reported by the ue to the base station includes the serving cell level and the inter-frequency neighbor cell level.
Specifically, a large number of a5 measurement reports of which the primary serving cell is the current given cell are obtained, the primary serving cell levels in each a5 measurement report are collected, the primary serving cell levels are matched to the divided level intervals, and the number of times of inter-frequency switching in each level interval is obtained. And calculating the pilot frequency switching efficiency of each level interval according to the number of pilot frequency switching occurring in each level interval, wherein the pilot frequency switching efficiency is a parameter for measuring the relative value of the number of pilot frequency switching occurring in a certain level interval compared with the number of pilot frequency switching occurring in other level intervals, for example, the pilot frequency switching efficiency is the ratio of the number of pilot frequency switching occurring in a certain level interval to the sum of the number of pilot frequency switching occurring in all level intervals, or the sum of the difference between the number of pilot frequency switching occurring in a certain level interval and the number of pilot frequency switching occurring in each level interval. In addition, the pilot frequency switching efficiency can reflect the concentrated interval of the execution level of the pilot frequency switching, and the correction is carried out based on the concentrated interval.
For example, the divided level intervals are interval a, interval b, interval c, and interval d in sequence from high to low, the number of inter-frequency switching occurring in each level interval is 10 times, 50 times, 30 times, and 10 times, respectively, so that the inter-frequency switching efficiency of interval b and interval c is higher than that of other level intervals, that is, inter-frequency switching occurs in interval b and interval c in a concentrated manner.
Step S203, adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval.
After the pilot frequency switching efficiency of each level interval is obtained through calculation, a level interval with relatively concentrated pilot frequency switching execution levels is obtained, and correspondingly, the start-up threshold of pilot frequency switching can be adjusted based on the level range corresponding to the concentrated level interval, so that the start-up threshold is reduced, the pilot frequency measurement time is shortened, and the influence on the service use of a user is reduced. It should be noted that, when adjusting the start-up threshold of inter-frequency handover, handover hysteresis needs to be considered.
Still taking the example in step S202 as an illustration, if the inter-frequency handover efficiency of the interval b and the interval c is high, the start-up threshold may be adjusted according to the upper limit level of the interval formed by the interval b and the interval c, for example, the adjusted start-up threshold is obtained by subtracting the handover delay from the upper limit level of the interval b.
The scheme of the invention can be automatically executed by an optimization platform, wherein, the big data of the A5 measurement report in the period is acquired again every first time period, and the big data is used as a support to adjust the start-up threshold of the given cell.
According to the method for optimizing the pilot frequency switching start-up threshold provided by the embodiment, aiming at a given cell, optimization adjustment is performed on the start-up threshold of the cell once according to big data every other first time period so as to reduce the start-up threshold to a proper value; and adjusting according to the pilot frequency switching efficiency of each level interval, wherein the pilot frequency switching efficiency is obtained by calculating the big data of the acquired A5 measurement report and can reflect the concentrated interval in which the pilot frequency switching occurs, and the pilot frequency switching efficiency is corrected and adjusted and the determined start-up threshold is supported by the big data, so that the result is more reliable; moreover, aiming at a given cell, by utilizing the optimization scheme, the individualized starting and detecting threshold corresponding to the cell can be adjusted and obtained, and the starting and detecting threshold which is uniformly set according to the empirical value is not only needed, so that the adjustment result is more targeted, and the actual switching condition of the given cell is better met. Therefore, by using the scheme of the embodiment, the starting threshold is corrected, so that the user equipment can more effectively enter the pilot frequency measurement process instead of starting pilot frequency starting too early, and the user perception is improved.
Fig. 3 is a flowchart illustrating a method for optimizing a inter-frequency handover initiation threshold according to another embodiment of the present invention. In the embodiment, based on fig. 2, the adjusted start-up threshold is further subjected to lifting correction. As shown in fig. 3, the method includes:
step S301, aiming at a given cell, acquiring a starting threshold of the cell different frequency switching, and dividing a plurality of level intervals according to the starting threshold.
Specifically, the plurality of level intervals are divided according to the start-up threshold, so that the divided level intervals can be matched with the current start-up threshold, for example, the divided level intervals are all below the start-up threshold.
In a specific embodiment of the present invention, the start-up threshold is set as an upper limit level of a level range in which inter-frequency handover may occur, a value obtained by subtracting a preset level from the start-up threshold is set as a lower limit level of the level range in which inter-frequency handover may occur, where the preset level may be determined according to an empirical value, and then the determined level range is divided into a plurality of level intervals according to a set level interval. The accuracy of the subsequent correction start-up threshold can be improved by adjusting the set step length of the level interval.
For example, if the conventional threshold is-88 dbm, the preset level is 40dbm, and the set level interval is 4dbm, the level range from-128 dbm to-88 dbm is divided every 4dbm, and the following level intervals [ -128, -124], [ -124, -120], [ -120, -116] … … [ -92, -88] are obtained in sequence.
Step S302, collecting the frequency of the inter-frequency switching of the cell in the base station in each level interval, and calculating the inter-frequency switching efficiency of each level interval.
The frequency of pilot frequency switching of each level interval can be counted by collecting an A5 measurement report reported to the base station by the user equipment and matching the level of the main service cell in the A5 measurement report with each level interval.
Fig. 4 is a diagram illustrating the divided level intervals and the number of inter-frequency handovers in an embodiment. In fig. 4, 18 level sections are set in total, wherein a level range corresponding to-140 dbm to-76 dbm is subdivided into 16 level sections, and a range smaller than-140 dbm is divided into one level section, and a level range larger than-76 dbm is divided into another level section. The rsrp (reference Signal Receiving power) is a reference Signal received power.
In this embodiment, for each level interval, a ratio of the number of inter-frequency handovers in the level interval to a sum of the number of inter-frequency handovers in a plurality of level intervals is calculated to obtain the inter-frequency handover efficiency of the level interval, where a higher inter-frequency handover efficiency of a level interval indicates that the inter-frequency handovers of the execution levels in the level interval are more concentrated. However, the present invention is not limited to the method for calculating the inter-frequency handover efficiency.
Fig. 5 shows a diagram of inter-frequency handover efficiency for each level interval of fig. 4. As shown in fig. 5, the inter-frequency handover performing level is concentrated in the-96 dbm to-84 dbm section, and the inter-frequency handover efficiencies of the three sections-96 dbm to-92 dbm, -92dbm to-88 dbm, and-88 dbm to-84 dbm constituting the section are sequentially reduced to 51%, 37%, and 9%, respectively.
Step S303, adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval.
Theoretically, in order to ensure the success rate of handover, on the basis of the existing pilot frequency handover start-up threshold, the highest execution level for pilot frequency handover should be very close to the start-up threshold, but not necessarily be a level interval with higher handover efficiency, which may cause the terminal to enter into the pilot frequency measurement too early, and affect the normal service of the user. Taking fig. 5 as an example, the highest execution level for the inter-frequency handover is between-84 dbm and-80 dbm, and the existing measurement threshold should be close to-80 dbm, but obviously, the efficiency of the inter-frequency handover in the level interval between-84 dbm and-80 dbm is not high. Therefore, in this embodiment, the measurement threshold is adjusted according to the inter-frequency handover efficiency of each level interval.
Specifically, the optimization platform automatically judges whether a first level interval exists in which the pilot frequency switching efficiency exceeds or equals to a first efficiency threshold value, and if the first level interval exists, the test starting threshold of pilot frequency switching is adjusted according to the upper limit level of the first level interval. When the first level interval exists, it indicates that the execution level of the inter-frequency switching is mainly concentrated in the first level interval, and at this time, the upper limit level of the first level interval may be directly corrected to the adjusted start-up threshold, or a level value obtained by subtracting the switching delay from the upper limit level of the first level interval may be set as the adjusted start-up threshold.
Further, if the first level interval does not exist, whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to the second efficiency threshold value exist is judged, and if the two continuous second level intervals exist, the start-up threshold of pilot frequency switching is adjusted according to the upper limit level of the two continuous second level intervals. When the first level interval does not exist, the execution level of the pilot frequency switching is not mainly concentrated in one level interval, and at the moment, whether the execution level of the pilot frequency switching is concentrated in two continuous second level intervals is judged, so that the start-up threshold is adjusted according to the upper limit levels of the two continuous second level intervals, the upper limit level of the higher second level interval can be directly corrected to be the adjusted start-up threshold, or the level value obtained by subtracting the switching delay lag from the upper limit level of the higher second level interval can be set to be the adjusted start-up threshold. The second efficiency threshold is larger than the first efficiency threshold, so as to reduce the number of two continuous second level intervals meeting the second efficiency threshold, so that only one group of second level intervals is judged as far as possible, and in addition, if the sum of the pilot frequency switching efficiencies of a plurality of groups of two continuous second level intervals is judged to exceed the second efficiency threshold, the group with the higher level value is used as the basis for adjustment. Or, in some embodiments of the present invention, to avoid determining a plurality of groups of two consecutive second level intervals, whether a maximum value of a sum of pilot frequency switching efficiencies of the two consecutive level intervals exceeds or is equal to a second efficiency threshold value may be determined, and if the maximum value of the sum of pilot frequency switching efficiencies of the two consecutive level intervals exceeds or is equal to the second efficiency threshold value, the two consecutive level intervals with the maximum sum of pilot frequency switching efficiencies are determined as the second level intervals, and further, the adjustment of the measurement threshold is started.
Furthermore, if there are no two continuous second level intervals, it is determined whether there are three continuous third level intervals in which the sum of the inter-frequency handover efficiencies exceeds or equals to the third efficiency threshold, and if there are three continuous third level intervals, the inter-frequency handover start threshold is adjusted according to the upper limit levels of the three continuous third level intervals. When two continuous second level intervals do not exist, the execution level of the pilot frequency switching is relatively dispersed, at the moment, judgment is carried out on three continuous third level intervals, and the third efficiency threshold value is equal to or slightly smaller than the second efficiency threshold value through proper adjustment of the efficiency threshold value, so that the third level intervals are quickly judged and the adjustment of the start-testing threshold is carried out. Similarly, similar to determining two continuous second level intervals, in order to avoid determining multiple groups of third level intervals, whether the maximum value of the sum of the pilot frequency switching efficiencies of the three continuous level intervals exceeds or is equal to a third efficiency threshold may be determined, and if the maximum value of the sum of the pilot frequency switching efficiencies of the three continuous level intervals exceeds the third efficiency threshold, the three continuous level intervals with the maximum sum of the pilot frequency switching efficiencies are determined as the third level intervals, and further adjustment of the start detection threshold is performed.
In addition, if the corrected start-up threshold still cannot be determined through the three determination processes, the start-up threshold may be kept unchanged, or the start-up threshold may be decreased according to a fixed step length, or the upper limit of the level interval with the highest pilot frequency switching efficiency may be directly determined as the adjusted start-up threshold, which is not limited in the present invention.
Taking fig. 5 as an example for explanation, assuming that the first efficiency threshold is 60%, the second efficiency threshold and the third efficiency threshold are both 80%, the pilot frequency switching efficiency in fig. 5 is 51% at most and does not exceed 60%, and the maximum sum of the efficiencies of two consecutive level intervals is 51% + 37% + 88%, which is greater than the second efficiency threshold 80%, then the switching hysteresis is subtracted from the upper-limit level of the level interval from-92 dbm to-88 dbm to obtain the adjusted start-up threshold.
Through the step, the start-up threshold is adjusted according to the concentrated interval of the execution level reflected by the pilot frequency switching efficiency, and the pilot frequency measurement can be prevented from entering too early by reducing the start-up threshold while the switching efficiency is ensured.
Step S304, the adjusted start-up threshold is used for replacing the original start-up threshold, the different frequency cutting-out untimely proportion of the cell is monitored in a second time period, and whether the different frequency cutting-out untimely proportion exceeds the untimely threshold is judged; if so, lifting the adjusted start-up threshold according to a preset step length; wherein the second time period is less than the first time period.
Specifically, an Operation and Maintenance Center (OMC) platform on the autonomous Telnet network side of the optimization platform according to the embodiment is executed, and registers and queries a corresponding network element and a registered network element, and backs up a pilot frequency handover start threshold of a given cell so as to perform rollback and improve network security; and then correcting the start-up threshold in the OMC platform according to the adjusted start-up threshold.
Taking Hua as an example, the correction process is as follows: MOD INTERFREQUEQGROUP: localcellld 123, inter freqho groupid 1, and inter freqhoa2 ThdRsrp-90.
Furthermore, after the original start-up threshold is replaced, the adjusted start-up threshold is used for triggering the entering of the pilot frequency measurement, and the pilot frequency cut-out untimely proportion of the cell is monitored in a second time period, wherein the untimely proportion of the pilot frequency cut-out is related to the set undersize of the start-up threshold, and the set undersize of the start-up threshold can cause the untimely pilot frequency switching of the user, so that the behaviors of link desynchronizing, line dropping, network disconnection and the like can occur. Based on this, in this embodiment, whether to further correct the adjusted start-up threshold is determined by monitoring the different frequency cut-out untimely ratio. And the second time period is smaller than the first time period, namely, the monitoring and the adjustment are carried out in the granularity of the second time period in the first time period after the start-up threshold is adjusted. For example, if the first time period is one week and the second time period is one hour, the start-up threshold is adjusted at a week granularity, and the adjusted start-up threshold is further modified at an hour granularity.
Furthermore, the pilot frequency out-of-time ratio refers to the ratio of the number of pilot frequency out-of-time times to the number of pilot frequency out-of-time times, and in a specific embodiment of the present invention, the sum of the number of times that the cell fails to switch out-of-frequency and the number of times that a terminal in the cell is out-of-step reconstructed to another cell is obtained, and the sum of the number of times is used as the number of times that the pilot frequency out-of-time is performed; then, the ratio of the sum of the times to the number of times of the request for the pilot frequency switching out of the cell is calculated to obtain the proportion of the pilot frequency switching out of time.
The cell inter-frequency handover failure times can be obtained by acquiring, by an optimization platform, handover failure trigger RRC (Radio Resource Control) reconstruction times in a cell inter-frequency handover process, optionally, acquiring a number of times that a recurring notification cause in a cell-level rrcconnectionrequest is "handover failure" within the same hour period, and physcelld is a given cell PCI.
And the times that the terminal in the cell is out of synchronization and reestablished to other cells can be counted by the optimization platform, the times that the neighbor cell in the RRC is the "otherFailure" in the rrcConnectionReestableRequest and the physCellId is the source cell can be counted, and the otherFailure can be equal to the wireless link failure because the reconfiguration failure of the bottom layer is less.
And when the pilot frequency cutting-out untimely proportion exceeds the untimely threshold value, the adjusted starting threshold is lifted by a preset step length, and optionally, the preset step length is set to be smaller than the difference value between the original starting threshold and the adjusted starting threshold, so that the condition that the starting threshold is set too large due to the fact that the adjusted starting threshold is corrected to exceed the original starting threshold is avoided. It should be noted that, after further correction by the preset step length, the step of monitoring the untimely ratio and determining needs to be executed circularly by the granularity of the second time period until the untimely ratio of the inter-frequency switching converges to the untimely threshold value or below.
For example, if the set non-timely threshold value is 1%, the preset step length is 2dbm, and when the non-timely proportion of the pilot frequency switching-out is judged to exceed 1%, the optimized platform can raise the adjusted start-up threshold by 2dbm until the non-timely proportion of the pilot frequency switching-out of the cell converges to 1%.
According to the pilot frequency switching start-up threshold optimization method provided by the embodiment, the main service cell level calculates the switching efficiency of each level interval through the cell level big data acquisition during pilot frequency switching, the start-up threshold is adjusted according to the interval switching efficiency, and the optimization process is automatically executed by an optimization platform without manual participation; after adjusting the start-up threshold, the platform autonomously monitors the pilot frequency switch-out untimely proportion index, and if the pilot frequency switch-out untimely proportion index does not reach the standard, the platform gradually backs down the start-up threshold to make the untimely proportion of the pilot frequency switch converge to the specified threshold. Therefore, according to the scheme of the embodiment, whether the pilot frequency switching start-up threshold of the existing network is accurate and timely is judged by collecting the level of the main service cell on the pilot frequency switching execution point, so that a user is prevented from entering the pilot frequency measurement too early, and on the basis, the pilot frequency switching out untimely proportion is monitored, so that the adjusted start-up threshold is further lifted and corrected, and the phenomena of link desynchronization, line drop, network disconnection and the like caused by the fact that the adjusted start-up threshold is too low are avoided, so that the user can effectively enter the pilot frequency measurement after the start-up threshold is optimized; and the whole process of the scheme is periodically and automatically executed by the optimization platform, so that the optimization process of starting the measurement threshold can be continuously and automatically carried out without manual participation.
To facilitate an understanding of the optimization process of the above-described method embodiments of the present invention, a specific implementation flow is described below as a complete example. Fig. 6 is a flowchart illustrating a method for optimizing a inter-frequency handover start threshold according to an embodiment of the present invention. As shown in fig. 6, the optimization platform automatically reads the pilot frequency switching start-up threshold for backup, where the pilot frequency switching start-up threshold may be obtained by adjustment after determination of switching efficiency and determined by an empirical value. Or the platform is obtained after being lifted automatically so as to be convenient to roll back and further ensure the network security; calculating the switching efficiency in different regions according to the divided level regions, and judging a start-up threshold of frame-skipping different-frequency switching through the switching efficiency; after adjustment, outputting the adjusted start-up threshold and the Telnet network side OMC platform, and correspondingly correcting the start-up threshold in the network side OMC platform; and then, determining whether the untimely proportion of pilot frequency switching is up to the standard or not by monitoring the success rate of pilot frequency switching, if not, further lifting a start-up threshold in the OMC platform at the network side on the basis of the adjustment, and continuously and circularly executing the processes of monitoring, judging the untimely proportion of pilot frequency switching-out and lifting the start-up threshold in a second time period until the untimely proportion of pilot frequency switching-out is up to the standard.
Fig. 7 shows a functional block diagram of an apparatus for optimizing a inter-frequency handover initiation threshold according to an embodiment of the present invention. As shown in fig. 7, the apparatus includes:
a dividing module 701, adapted to divide a plurality of level intervals;
a switching efficiency calculating module 702, adapted to collect, for a given cell, the number of times of inter-frequency switching occurring in each level interval of the cell in the base station in a first time period, and calculate the inter-frequency switching efficiency in each level interval;
the adjusting module 703 is adapted to adjust a start-up threshold of the inter-frequency handover according to the inter-frequency handover efficiency of each level interval.
In an optional embodiment, the handover efficiency calculation module is further adapted to:
and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval.
In an alternative embodiment, the adjustment module is further adapted to:
and judging whether a first level interval with the pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the first level interval.
In an alternative embodiment, the adjustment module is further adapted to:
if the first level interval does not exist, judging whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to a second efficiency threshold value exist, and if the two continuous second level intervals exist, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the two continuous second level intervals; wherein the second efficiency threshold is greater than the first efficiency threshold.
In an alternative embodiment, the adjustment module is further adapted to:
if two continuous second level intervals do not exist, judging whether three continuous third level intervals exist, wherein the sum of the pilot frequency switching efficiency exceeds or equals to a third efficiency threshold value, and if three continuous third level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the three continuous third level intervals.
In an alternative embodiment, the apparatus further comprises: a correction module adapted to: replacing the original starting threshold by the adjusted starting threshold; monitoring the pilot frequency switching-out untimely proportion of the cell in a second time period, and judging whether the pilot frequency switching-out untimely proportion exceeds a untimely threshold value or not; if so, lifting the adjusted start-up threshold according to a preset step length; wherein the second time period is less than the first time period.
In an alternative embodiment, the correction module is further adapted to:
and solving the sum of the times of the cell different frequency switching failure and the times of the terminal desynchronizing reconstruction to other cells in the cell, and calculating the ratio of the sum of the times to the times of the cell different frequency switching request to obtain the different frequency switching untimely proportion.
The embodiment of the application provides a non-volatile computer storage medium, wherein at least one executable instruction is stored in the computer storage medium, and the computer executable instruction can execute the method for optimizing the pilot frequency switching start-up threshold in any method embodiment.
Fig. 8 is a schematic structural diagram of a computing device according to an embodiment of the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the computing device.
As shown in fig. 8, the computing device may include: a processor (processor)802, a Communications Interface 804, a memory 806, and a communication bus 808.
Wherein:
the processor 802, communication interface 804, and memory 806 communicate with one another via a communication bus 808.
A communication interface 804 for communicating with network elements of other devices, such as clients or other servers.
The processor 802 is configured to execute the program 810, and may specifically execute relevant steps in the above-described method for optimizing the inter-frequency handover initiation threshold.
In particular, the program 810 may include program code comprising computer operating instructions.
The processor 802 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present invention. The computing device includes one or more processors, which may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
The memory 806 stores a program 810. The memory 806 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 810 may be specifically configured to cause the processor 802 to perform the following operations:
dividing a plurality of level intervals;
aiming at a given cell, acquiring the frequency of pilot frequency switching of the cell in a base station in each level interval in a first time period, and calculating the pilot frequency switching efficiency of each level interval;
and adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval.
In an alternative embodiment, the program 810 may be further specifically configured to cause the processor 802 to: and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval.
In an alternative embodiment, the program 810 may be further specifically configured to cause the processor 802 to: and judging whether a first level interval with the pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the first level interval.
In an alternative embodiment, the program 810 may be further specifically configured to cause the processor 802 to: if the first level interval does not exist, judging whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to a second efficiency threshold value exist, and if the two continuous second level intervals exist, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the two continuous second level intervals; wherein the second efficiency threshold is greater than the first efficiency threshold.
In an alternative embodiment, the program 810 may specifically be further configured to cause the processor 802 to perform the following operations: if two continuous second level intervals do not exist, judging whether three continuous third level intervals exist, wherein the sum of the pilot frequency switching efficiency exceeds or equals to a third efficiency threshold value, and if three continuous third level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the three continuous third level intervals.
In an alternative embodiment, the program 810 may specifically be further configured to cause the processor 802 to perform the following operations: replacing the original starting threshold by the adjusted starting threshold;
monitoring the different frequency switching-out untimely proportion of the cell in a second time period, and judging whether the different frequency switching-out untimely proportion exceeds a untimely threshold value; if so, lifting the adjusted start-up threshold according to a preset step length; wherein the second time period is less than the first time period.
In an alternative embodiment, the program 810 may be further specifically configured to cause the processor 802 to: and solving the sum of the times of the cell different frequency switching failure and the times of the terminal desynchronizing reconstruction to other cells in the cell, and calculating the ratio of the sum of the times to the times of the cell different frequency switching request to obtain the different frequency switching untimely proportion.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore, may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. It will be appreciated by those skilled in the art that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components of the inter-frequency handover initiation threshold optimization apparatus according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website, or provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (8)
1. A method for optimizing a pilot frequency switch start-up threshold is characterized by comprising the following steps:
dividing a plurality of level intervals;
acquiring the frequency of pilot frequency switching of a cell in a base station in each level interval in a first time period aiming at a given cell, and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval;
adjusting the start-up threshold of the pilot frequency switch according to the pilot frequency switch efficiency of each level interval, wherein the start-up threshold comprises the following steps: judging whether a first level interval with pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a pilot frequency switching start-up threshold according to an upper limit level of the first level interval.
2. The method of claim 1, wherein adjusting the inter-frequency handover start threshold according to the inter-frequency handover efficiency of each level interval further comprises:
if the first level interval does not exist, judging whether two continuous second level intervals with the sum of the pilot frequency switching efficiency exceeding or equal to a second efficiency threshold value exist, and if the two continuous second level intervals exist, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the two continuous second level intervals; and the second efficiency threshold value is greater than the first efficiency threshold value.
3. The method of claim 2, wherein adjusting the inter-frequency handover start threshold according to the inter-frequency handover efficiency of each level interval further comprises:
if two continuous second level intervals do not exist, judging whether three continuous third level intervals exist, wherein the sum of the pilot frequency switching efficiency exceeds or equals to a third efficiency threshold value, and if three continuous third level intervals exist, adjusting the start-up threshold of pilot frequency switching according to the upper limit levels of the three continuous third level intervals.
4. The method according to claim 1, wherein after the adjusting the inter-frequency handover start threshold according to the inter-frequency handover efficiency of each level interval, the method further comprises:
replacing the original starting threshold by the adjusted starting threshold;
monitoring the pilot frequency switching-out untimely proportion of the cell in a second time period, and judging whether the pilot frequency switching-out untimely proportion exceeds a untimely threshold value or not; if so, lifting the adjusted start-up threshold according to a preset step length; wherein the second time period is less than the first time period.
5. The method according to claim 4, wherein the pilot frequency cut-out miscime ratio is calculated by the following steps:
and solving the sum of the times of the cell different frequency switching failure and the times of the terminal desynchronizing reconstruction to other cells in the cell, and calculating the ratio of the sum of the times to the times of the cell different frequency switching request to obtain the different frequency switching untimely proportion.
6. An apparatus for optimizing a pilot frequency handover start threshold, comprising:
the dividing module is suitable for dividing a plurality of level intervals;
the switching efficiency calculation module is suitable for acquiring the frequency of pilot frequency switching of a cell in a base station in each level interval in a first time period aiming at a given cell, and calculating the ratio of the frequency of pilot frequency switching of the level interval to the sum of the frequency of pilot frequency switching of a plurality of level intervals aiming at each level interval to obtain the pilot frequency switching efficiency of the level interval;
the adjusting module is suitable for adjusting the start-up threshold of the pilot frequency switching according to the pilot frequency switching efficiency of each level interval, and comprises the following steps: and judging whether a first level interval with the pilot frequency switching efficiency exceeding or equal to a first efficiency threshold value exists, and if the first level interval exists, adjusting a start-up threshold of pilot frequency switching according to the upper limit level of the first level interval.
7. A computing device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction causes the processor to execute the operation corresponding to the pilot frequency switching initiation threshold optimization method according to any one of claims 1-5.
8. A computer storage medium having at least one executable instruction stored therein, the executable instruction causing a processor to perform operations corresponding to the method for optimizing a inter-frequency handover initiation threshold according to any one of claims 1-5.
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